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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /bfd/xcofflink.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'bfd/xcofflink.c')
-rw-r--r--bfd/xcofflink.c6635
1 files changed, 6635 insertions, 0 deletions
diff --git a/bfd/xcofflink.c b/bfd/xcofflink.c
new file mode 100644
index 0000000..c882d23
--- /dev/null
+++ b/bfd/xcofflink.c
@@ -0,0 +1,6635 @@
+/* POWER/PowerPC XCOFF linker support.
+ Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+/* This file holds the XCOFF linker code. */
+
+#define STRING_SIZE_SIZE (4)
+
+/* In order to support linking different object file formats into an
+ XCOFF format, we need to be able to determine whether a particular
+ bfd_target is an XCOFF vector. FIXME: We need to rethink this
+ whole approach. */
+#define XCOFF_XVECP(xv) \
+ (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \
+ || strcmp ((xv)->name, "xcoff-powermac") == 0)
+
+/* Get the XCOFF hash table entries for a BFD. */
+#define obj_xcoff_sym_hashes(bfd) \
+ ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
+
+/* XCOFF relocation types. These probably belong in a header file
+ somewhere. The relocations are described in the function
+ _bfd_ppc_xcoff_relocate_section in this file. */
+
+#define R_POS (0x00)
+#define R_NEG (0x01)
+#define R_REL (0x02)
+#define R_TOC (0x03)
+#define R_RTB (0x04)
+#define R_GL (0x05)
+#define R_TCL (0x06)
+#define R_BA (0x08)
+#define R_BR (0x0a)
+#define R_RL (0x0c)
+#define R_RLA (0x0d)
+#define R_REF (0x0f)
+#define R_TRL (0x12)
+#define R_TRLA (0x13)
+#define R_RRTBI (0x14)
+#define R_RRTBA (0x15)
+#define R_CAI (0x16)
+#define R_CREL (0x17)
+#define R_RBA (0x18)
+#define R_RBAC (0x19)
+#define R_RBR (0x1a)
+#define R_RBRC (0x1b)
+
+/* The first word of global linkage code. This must be modified by
+ filling in the correct TOC offset. */
+
+#define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
+
+/* The remaining words of global linkage code. */
+
+static unsigned long xcoff_glink_code[] =
+{
+ 0x90410014, /* stw r2,20(r1) */
+ 0x800c0000, /* lwz r0,0(r12) */
+ 0x804c0004, /* lwz r2,4(r12) */
+ 0x7c0903a6, /* mtctr r0 */
+ 0x4e800420, /* bctr */
+ 0x0, /* start of traceback table */
+ 0x000c8000, /* traceback table */
+ 0x0 /* traceback table */
+};
+
+#define XCOFF_GLINK_SIZE \
+ (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
+
+/* We reuse the SEC_ROM flag as a mark flag for garbage collection.
+ This flag will only be used on input sections. */
+
+#define SEC_MARK (SEC_ROM)
+
+/* The ldhdr structure. This appears at the start of the .loader
+ section. */
+
+struct internal_ldhdr
+{
+ /* The version number: currently always 1. */
+ unsigned long l_version;
+ /* The number of symbol table entries. */
+ bfd_size_type l_nsyms;
+ /* The number of relocation table entries. */
+ bfd_size_type l_nreloc;
+ /* The length of the import file string table. */
+ bfd_size_type l_istlen;
+ /* The number of import files. */
+ bfd_size_type l_nimpid;
+ /* The offset from the start of the .loader section to the first
+ entry in the import file table. */
+ bfd_size_type l_impoff;
+ /* The length of the string table. */
+ bfd_size_type l_stlen;
+ /* The offset from the start of the .loader section to the first
+ entry in the string table. */
+ bfd_size_type l_stoff;
+};
+
+struct external_ldhdr
+{
+ bfd_byte l_version[4];
+ bfd_byte l_nsyms[4];
+ bfd_byte l_nreloc[4];
+ bfd_byte l_istlen[4];
+ bfd_byte l_nimpid[4];
+ bfd_byte l_impoff[4];
+ bfd_byte l_stlen[4];
+ bfd_byte l_stoff[4];
+};
+
+#define LDHDRSZ (8 * 4)
+
+/* The ldsym structure. This is used to represent a symbol in the
+ .loader section. */
+
+struct internal_ldsym
+{
+ union
+ {
+ /* The symbol name if <= SYMNMLEN characters. */
+ char _l_name[SYMNMLEN];
+ struct
+ {
+ /* Zero if the symbol name is more than SYMNMLEN characters. */
+ long _l_zeroes;
+ /* The offset in the string table if the symbol name is more
+ than SYMNMLEN characters. */
+ long _l_offset;
+ } _l_l;
+ } _l;
+ /* The symbol value. */
+ bfd_vma l_value;
+ /* The symbol section number. */
+ short l_scnum;
+ /* The symbol type and flags. */
+ char l_smtype;
+ /* The symbol storage class. */
+ char l_smclas;
+ /* The import file ID. */
+ bfd_size_type l_ifile;
+ /* Offset to the parameter type check string. */
+ bfd_size_type l_parm;
+};
+
+struct external_ldsym
+{
+ union
+ {
+ bfd_byte _l_name[SYMNMLEN];
+ struct
+ {
+ bfd_byte _l_zeroes[4];
+ bfd_byte _l_offset[4];
+ } _l_l;
+ } _l;
+ bfd_byte l_value[4];
+ bfd_byte l_scnum[2];
+ bfd_byte l_smtype[1];
+ bfd_byte l_smclas[1];
+ bfd_byte l_ifile[4];
+ bfd_byte l_parm[4];
+};
+
+#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
+
+/* These flags are for the l_smtype field (the lower three bits are an
+ XTY_* value). */
+
+/* Imported symbol. */
+#define L_IMPORT (0x40)
+/* Entry point. */
+#define L_ENTRY (0x20)
+/* Exported symbol. */
+#define L_EXPORT (0x10)
+
+/* The ldrel structure. This is used to represent a reloc in the
+ .loader section. */
+
+struct internal_ldrel
+{
+ /* The reloc address. */
+ bfd_vma l_vaddr;
+ /* The symbol table index in the .loader section symbol table. */
+ bfd_size_type l_symndx;
+ /* The relocation type and size. */
+ short l_rtype;
+ /* The section number this relocation applies to. */
+ short l_rsecnm;
+};
+
+struct external_ldrel
+{
+ bfd_byte l_vaddr[4];
+ bfd_byte l_symndx[4];
+ bfd_byte l_rtype[2];
+ bfd_byte l_rsecnm[2];
+};
+
+#define LDRELSZ (2 * 4 + 2 * 2)
+
+/* The list of import files. */
+
+struct xcoff_import_file
+{
+ /* The next entry in the list. */
+ struct xcoff_import_file *next;
+ /* The path. */
+ const char *path;
+ /* The file name. */
+ const char *file;
+ /* The member name. */
+ const char *member;
+};
+
+/* An entry in the XCOFF linker hash table. */
+
+struct xcoff_link_hash_entry
+{
+ struct bfd_link_hash_entry root;
+
+ /* Symbol index in output file. Set to -1 initially. Set to -2 if
+ there is a reloc against this symbol. */
+ long indx;
+
+ /* If we have created a TOC entry for this symbol, this is the .tc
+ section which holds it. */
+ asection *toc_section;
+
+ union
+ {
+ /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
+ set), this is the offset in toc_section. */
+ bfd_vma toc_offset;
+ /* If the TOC entry comes from an input file, this is set to the
+ symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
+ long toc_indx;
+ } u;
+
+ /* If this symbol is a function entry point which is called, this
+ field holds a pointer to the function descriptor. If this symbol
+ is a function descriptor, this field holds a pointer to the
+ function entry point. */
+ struct xcoff_link_hash_entry *descriptor;
+
+ /* The .loader symbol table entry, if there is one. */
+ struct internal_ldsym *ldsym;
+
+ /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
+ index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
+ this is the l_ifile value. */
+ long ldindx;
+
+ /* Some linker flags. */
+ unsigned short flags;
+ /* Symbol is referenced by a regular object. */
+#define XCOFF_REF_REGULAR (01)
+ /* Symbol is defined by a regular object. */
+#define XCOFF_DEF_REGULAR (02)
+ /* Symbol is defined by a dynamic object. */
+#define XCOFF_DEF_DYNAMIC (04)
+ /* Symbol is used in a reloc being copied into the .loader section. */
+#define XCOFF_LDREL (010)
+ /* Symbol is the entry point. */
+#define XCOFF_ENTRY (020)
+ /* Symbol is called; this is, it appears in a R_BR reloc. */
+#define XCOFF_CALLED (040)
+ /* Symbol needs the TOC entry filled in. */
+#define XCOFF_SET_TOC (0100)
+ /* Symbol is explicitly imported. */
+#define XCOFF_IMPORT (0200)
+ /* Symbol is explicitly exported. */
+#define XCOFF_EXPORT (0400)
+ /* Symbol has been processed by xcoff_build_ldsyms. */
+#define XCOFF_BUILT_LDSYM (01000)
+ /* Symbol is mentioned by a section which was not garbage collected. */
+#define XCOFF_MARK (02000)
+ /* Symbol size is recorded in size_list list from hash table. */
+#define XCOFF_HAS_SIZE (04000)
+ /* Symbol is a function descriptor. */
+#define XCOFF_DESCRIPTOR (010000)
+ /* Multiple definitions have been for the symbol. */
+#define XCOFF_MULTIPLY_DEFINED (020000)
+
+ /* The storage mapping class. */
+ unsigned char smclas;
+};
+
+/* The XCOFF linker hash table. */
+
+struct xcoff_link_hash_table
+{
+ struct bfd_link_hash_table root;
+
+ /* The .debug string hash table. We need to compute this while
+ reading the input files, so that we know how large the .debug
+ section will be before we assign section positions. */
+ struct bfd_strtab_hash *debug_strtab;
+
+ /* The .debug section we will use for the final output. */
+ asection *debug_section;
+
+ /* The .loader section we will use for the final output. */
+ asection *loader_section;
+
+ /* A count of non TOC relative relocs which will need to be
+ allocated in the .loader section. */
+ size_t ldrel_count;
+
+ /* The .loader section header. */
+ struct internal_ldhdr ldhdr;
+
+ /* The .gl section we use to hold global linkage code. */
+ asection *linkage_section;
+
+ /* The .tc section we use to hold toc entries we build for global
+ linkage code. */
+ asection *toc_section;
+
+ /* The .ds section we use to hold function descriptors which we
+ create for exported symbols. */
+ asection *descriptor_section;
+
+ /* The list of import files. */
+ struct xcoff_import_file *imports;
+
+ /* Required alignment of sections within the output file. */
+ unsigned long file_align;
+
+ /* Whether the .text section must be read-only. */
+ boolean textro;
+
+ /* Whether garbage collection was done. */
+ boolean gc;
+
+ /* A linked list of symbols for which we have size information. */
+ struct xcoff_link_size_list
+ {
+ struct xcoff_link_size_list *next;
+ struct xcoff_link_hash_entry *h;
+ bfd_size_type size;
+ } *size_list;
+
+ /* Magic sections: _text, _etext, _data, _edata, _end, end. */
+ asection *special_sections[6];
+};
+
+/* Information we keep for each section in the output file during the
+ final link phase. */
+
+struct xcoff_link_section_info
+{
+ /* The relocs to be output. */
+ struct internal_reloc *relocs;
+ /* For each reloc against a global symbol whose index was not known
+ when the reloc was handled, the global hash table entry. */
+ struct xcoff_link_hash_entry **rel_hashes;
+ /* If there is a TOC relative reloc against a global symbol, and the
+ index of the TOC symbol is not known when the reloc was handled,
+ an entry is added to this linked list. This is not an array,
+ like rel_hashes, because this case is quite uncommon. */
+ struct xcoff_toc_rel_hash
+ {
+ struct xcoff_toc_rel_hash *next;
+ struct xcoff_link_hash_entry *h;
+ struct internal_reloc *rel;
+ } *toc_rel_hashes;
+};
+
+/* Information that we pass around while doing the final link step. */
+
+struct xcoff_final_link_info
+{
+ /* General link information. */
+ struct bfd_link_info *info;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Hash table for long symbol names. */
+ struct bfd_strtab_hash *strtab;
+ /* Array of information kept for each output section, indexed by the
+ target_index field. */
+ struct xcoff_link_section_info *section_info;
+ /* Symbol index of last C_FILE symbol (-1 if none). */
+ long last_file_index;
+ /* Contents of last C_FILE symbol. */
+ struct internal_syment last_file;
+ /* Symbol index of TOC symbol. */
+ long toc_symindx;
+ /* Start of .loader symbols. */
+ struct external_ldsym *ldsym;
+ /* Next .loader reloc to swap out. */
+ struct external_ldrel *ldrel;
+ /* File position of start of line numbers. */
+ file_ptr line_filepos;
+ /* Buffer large enough to hold swapped symbols of any input file. */
+ struct internal_syment *internal_syms;
+ /* Buffer large enough to hold output indices of symbols of any
+ input file. */
+ long *sym_indices;
+ /* Buffer large enough to hold output symbols for any input file. */
+ bfd_byte *outsyms;
+ /* Buffer large enough to hold external line numbers for any input
+ section. */
+ bfd_byte *linenos;
+ /* Buffer large enough to hold any input section. */
+ bfd_byte *contents;
+ /* Buffer large enough to hold external relocs of any input section. */
+ bfd_byte *external_relocs;
+};
+
+static void xcoff_swap_ldhdr_in
+ PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *));
+static void xcoff_swap_ldhdr_out
+ PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *));
+static void xcoff_swap_ldsym_in
+ PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *));
+static void xcoff_swap_ldsym_out
+ PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *));
+static void xcoff_swap_ldrel_in
+ PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *));
+static void xcoff_swap_ldrel_out
+ PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *));
+static struct bfd_hash_entry *xcoff_link_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *));
+static struct internal_reloc *xcoff_read_internal_relocs
+ PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
+ struct internal_reloc *));
+static boolean xcoff_link_add_object_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean xcoff_link_check_archive_element
+ PARAMS ((bfd *, struct bfd_link_info *, boolean *));
+static boolean xcoff_link_check_ar_symbols
+ PARAMS ((bfd *, struct bfd_link_info *, boolean *));
+static boolean xcoff_link_check_dynamic_ar_symbols
+ PARAMS ((bfd *, struct bfd_link_info *, boolean *));
+static bfd_size_type xcoff_find_reloc
+ PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
+static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
+static boolean xcoff_link_add_dynamic_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean xcoff_mark_symbol
+ PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *));
+static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
+static void xcoff_sweep PARAMS ((struct bfd_link_info *));
+static boolean xcoff_build_ldsyms
+ PARAMS ((struct xcoff_link_hash_entry *, PTR));
+static boolean xcoff_link_input_bfd
+ PARAMS ((struct xcoff_final_link_info *, bfd *));
+static boolean xcoff_write_global_symbol
+ PARAMS ((struct xcoff_link_hash_entry *, PTR));
+static boolean xcoff_reloc_link_order
+ PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
+ struct bfd_link_order *));
+static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
+
+/* Routines to swap information in the XCOFF .loader section. If we
+ ever need to write an XCOFF loader, this stuff will need to be
+ moved to another file shared by the linker (which XCOFF calls the
+ ``binder'') and the loader. */
+
+/* Swap in the ldhdr structure. */
+
+static void
+xcoff_swap_ldhdr_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldhdr *src;
+ struct internal_ldhdr *dst;
+{
+ dst->l_version = bfd_get_32 (abfd, src->l_version);
+ dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms);
+ dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc);
+ dst->l_istlen = bfd_get_32 (abfd, src->l_istlen);
+ dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid);
+ dst->l_impoff = bfd_get_32 (abfd, src->l_impoff);
+ dst->l_stlen = bfd_get_32 (abfd, src->l_stlen);
+ dst->l_stoff = bfd_get_32 (abfd, src->l_stoff);
+}
+
+/* Swap out the ldhdr structure. */
+
+static void
+xcoff_swap_ldhdr_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldhdr *src;
+ struct external_ldhdr *dst;
+{
+ bfd_put_32 (abfd, src->l_version, dst->l_version);
+ bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms);
+ bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc);
+ bfd_put_32 (abfd, src->l_istlen, dst->l_istlen);
+ bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid);
+ bfd_put_32 (abfd, src->l_impoff, dst->l_impoff);
+ bfd_put_32 (abfd, src->l_stlen, dst->l_stlen);
+ bfd_put_32 (abfd, src->l_stoff, dst->l_stoff);
+}
+
+/* Swap in the ldsym structure. */
+
+static void
+xcoff_swap_ldsym_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldsym *src;
+ struct internal_ldsym *dst;
+{
+ if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0)
+ memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
+ else
+ {
+ dst->_l._l_l._l_zeroes = 0;
+ dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset);
+ }
+ dst->l_value = bfd_get_32 (abfd, src->l_value);
+ dst->l_scnum = bfd_get_16 (abfd, src->l_scnum);
+ dst->l_smtype = bfd_get_8 (abfd, src->l_smtype);
+ dst->l_smclas = bfd_get_8 (abfd, src->l_smclas);
+ dst->l_ifile = bfd_get_32 (abfd, src->l_ifile);
+ dst->l_parm = bfd_get_32 (abfd, src->l_parm);
+}
+
+/* Swap out the ldsym structure. */
+
+static void
+xcoff_swap_ldsym_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldsym *src;
+ struct external_ldsym *dst;
+{
+ if (src->_l._l_l._l_zeroes != 0)
+ memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
+ else
+ {
+ bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes);
+ bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset);
+ }
+ bfd_put_32 (abfd, src->l_value, dst->l_value);
+ bfd_put_16 (abfd, src->l_scnum, dst->l_scnum);
+ bfd_put_8 (abfd, src->l_smtype, dst->l_smtype);
+ bfd_put_8 (abfd, src->l_smclas, dst->l_smclas);
+ bfd_put_32 (abfd, src->l_ifile, dst->l_ifile);
+ bfd_put_32 (abfd, src->l_parm, dst->l_parm);
+}
+
+/* Swap in the ldrel structure. */
+
+static void
+xcoff_swap_ldrel_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldrel *src;
+ struct internal_ldrel *dst;
+{
+ dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr);
+ dst->l_symndx = bfd_get_32 (abfd, src->l_symndx);
+ dst->l_rtype = bfd_get_16 (abfd, src->l_rtype);
+ dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm);
+}
+
+/* Swap out the ldrel structure. */
+
+static void
+xcoff_swap_ldrel_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldrel *src;
+ struct external_ldrel *dst;
+{
+ bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr);
+ bfd_put_32 (abfd, src->l_symndx, dst->l_symndx);
+ bfd_put_16 (abfd, src->l_rtype, dst->l_rtype);
+ bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm);
+}
+
+/* Routines to read XCOFF dynamic information. This don't really
+ belong here, but we already have the ldsym manipulation routines
+ here. */
+
+/* Read the contents of a section. */
+
+static boolean
+xcoff_get_section_contents (abfd, sec)
+ bfd *abfd;
+ asection *sec;
+{
+ if (coff_section_data (abfd, sec) == NULL)
+ {
+ sec->used_by_bfd = bfd_zalloc (abfd,
+ sizeof (struct coff_section_tdata));
+ if (sec->used_by_bfd == NULL)
+ return false;
+ }
+
+ if (coff_section_data (abfd, sec)->contents == NULL)
+ {
+ coff_section_data (abfd, sec)->contents =
+ (bfd_byte *) bfd_malloc (sec->_raw_size);
+ if (coff_section_data (abfd, sec)->contents == NULL)
+ return false;
+
+ if (! bfd_get_section_contents (abfd, sec,
+ coff_section_data (abfd, sec)->contents,
+ (file_ptr) 0, sec->_raw_size))
+ return false;
+ }
+
+ return true;
+}
+
+/* Get the size required to hold the dynamic symbols. */
+
+long
+_bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ return (ldhdr.l_nsyms + 1) * sizeof (asymbol *);
+}
+
+/* Get the dynamic symbols. */
+
+long
+_bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
+ bfd *abfd;
+ asymbol **psyms;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+ coff_symbol_type *symbuf;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ coff_section_data (abfd, lsec)->keep_contents = true;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ strings = (char *) contents + ldhdr.l_stoff;
+
+ symbuf = ((coff_symbol_type *)
+ bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type)));
+ if (symbuf == NULL)
+ return -1;
+
+ elsym = (struct external_ldsym *) (contents + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ for (; elsym < elsymend; elsym++, symbuf++, psyms++)
+ {
+ struct internal_ldsym ldsym;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ symbuf->symbol.the_bfd = abfd;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ symbuf->symbol.name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ int i;
+
+ for (i = 0; i < SYMNMLEN; i++)
+ if (ldsym._l._l_name[i] == '\0')
+ break;
+ if (i < SYMNMLEN)
+ symbuf->symbol.name = (char *) elsym->_l._l_name;
+ else
+ {
+ char *c;
+
+ c = bfd_alloc (abfd, SYMNMLEN + 1);
+ if (c == NULL)
+ return -1;
+ memcpy (c, ldsym._l._l_name, SYMNMLEN);
+ c[SYMNMLEN] = '\0';
+ symbuf->symbol.name = c;
+ }
+ }
+
+ if (ldsym.l_smclas == XMC_XO)
+ symbuf->symbol.section = bfd_abs_section_ptr;
+ else
+ symbuf->symbol.section = coff_section_from_bfd_index (abfd,
+ ldsym.l_scnum);
+ symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma;
+
+ symbuf->symbol.flags = BSF_NO_FLAGS;
+ if ((ldsym.l_smtype & L_EXPORT) != 0)
+ symbuf->symbol.flags |= BSF_GLOBAL;
+
+ /* FIXME: We have no way to record the other information stored
+ with the loader symbol. */
+
+ *psyms = (asymbol *) symbuf;
+ }
+
+ *psyms = NULL;
+
+ return ldhdr.l_nsyms;
+}
+
+/* Get the size required to hold the dynamic relocs. */
+
+long
+_bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
+ bfd *abfd;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ return (ldhdr.l_nreloc + 1) * sizeof (arelent *);
+}
+
+/* The typical dynamic reloc. */
+
+static reloc_howto_type xcoff_dynamic_reloc =
+ HOWTO (0, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_POS", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false); /* pcrel_offset */
+
+/* Get the dynamic relocs. */
+
+long
+_bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
+ bfd *abfd;
+ arelent **prelocs;
+ asymbol **syms;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+ arelent *relbuf;
+ struct external_ldrel *elrel, *elrelend;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent));
+ if (relbuf == NULL)
+ return -1;
+
+ elrel = ((struct external_ldrel *)
+ (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ));
+ elrelend = elrel + ldhdr.l_nreloc;
+ for (; elrel < elrelend; elrel++, relbuf++, prelocs++)
+ {
+ struct internal_ldrel ldrel;
+
+ xcoff_swap_ldrel_in (abfd, elrel, &ldrel);
+
+ if (ldrel.l_symndx >= 3)
+ relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3);
+ else
+ {
+ const char *name;
+ asection *sec;
+
+ switch (ldrel.l_symndx)
+ {
+ case 0:
+ name = ".text";
+ break;
+ case 1:
+ name = ".data";
+ break;
+ case 2:
+ name = ".bss";
+ break;
+ default:
+ abort ();
+ break;
+ }
+
+ sec = bfd_get_section_by_name (abfd, name);
+ if (sec == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return -1;
+ }
+
+ relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
+ }
+
+ relbuf->address = ldrel.l_vaddr;
+ relbuf->addend = 0;
+
+ /* Most dynamic relocs have the same type. FIXME: This is only
+ correct if ldrel.l_rtype == 0. In other cases, we should use
+ a different howto. */
+ relbuf->howto = &xcoff_dynamic_reloc;
+
+ /* FIXME: We have no way to record the l_rsecnm field. */
+
+ *prelocs = relbuf;
+ }
+
+ *prelocs = NULL;
+
+ return ldhdr.l_nreloc;
+}
+
+/* Routine to create an entry in an XCOFF link hash table. */
+
+static struct bfd_hash_entry *
+xcoff_link_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == (struct xcoff_link_hash_entry *) NULL)
+ ret = ((struct xcoff_link_hash_entry *)
+ bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
+ if (ret == (struct xcoff_link_hash_entry *) NULL)
+ return (struct bfd_hash_entry *) ret;
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct xcoff_link_hash_entry *)
+ _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
+ table, string));
+ if (ret != NULL)
+ {
+ /* Set local fields. */
+ ret->indx = -1;
+ ret->toc_section = NULL;
+ ret->u.toc_indx = -1;
+ ret->descriptor = NULL;
+ ret->ldsym = NULL;
+ ret->ldindx = -1;
+ ret->flags = 0;
+ ret->smclas = XMC_UA;
+ }
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Create a XCOFF link hash table. */
+
+struct bfd_link_hash_table *
+_bfd_xcoff_bfd_link_hash_table_create (abfd)
+ bfd *abfd;
+{
+ struct xcoff_link_hash_table *ret;
+
+ ret = ((struct xcoff_link_hash_table *)
+ bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table)));
+ if (ret == (struct xcoff_link_hash_table *) NULL)
+ return (struct bfd_link_hash_table *) NULL;
+ if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
+ {
+ bfd_release (abfd, ret);
+ return (struct bfd_link_hash_table *) NULL;
+ }
+
+ ret->debug_strtab = _bfd_xcoff_stringtab_init ();
+ ret->debug_section = NULL;
+ ret->loader_section = NULL;
+ ret->ldrel_count = 0;
+ memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
+ ret->linkage_section = NULL;
+ ret->toc_section = NULL;
+ ret->descriptor_section = NULL;
+ ret->imports = NULL;
+ ret->file_align = 0;
+ ret->textro = false;
+ ret->gc = false;
+ memset (ret->special_sections, 0, sizeof ret->special_sections);
+
+ /* The linker will always generate a full a.out header. We need to
+ record that fact now, before the sizeof_headers routine could be
+ called. */
+ xcoff_data (abfd)->full_aouthdr = true;
+
+ return &ret->root;
+}
+
+/* Look up an entry in an XCOFF link hash table. */
+
+#define xcoff_link_hash_lookup(table, string, create, copy, follow) \
+ ((struct xcoff_link_hash_entry *) \
+ bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
+ (follow)))
+
+/* Traverse an XCOFF link hash table. */
+
+#define xcoff_link_hash_traverse(table, func, info) \
+ (bfd_link_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* Get the XCOFF link hash table from the info structure. This is
+ just a cast. */
+
+#define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
+
+/* Read internal relocs for an XCOFF csect. This is a wrapper around
+ _bfd_coff_read_internal_relocs which tries to take advantage of any
+ relocs which may have been cached for the enclosing section. */
+
+static struct internal_reloc *
+xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
+ require_internal, internal_relocs)
+ bfd *abfd;
+ asection *sec;
+ boolean cache;
+ bfd_byte *external_relocs;
+ boolean require_internal;
+ struct internal_reloc *internal_relocs;
+{
+ if (coff_section_data (abfd, sec) != NULL
+ && coff_section_data (abfd, sec)->relocs == NULL
+ && xcoff_section_data (abfd, sec) != NULL)
+ {
+ asection *enclosing;
+
+ enclosing = xcoff_section_data (abfd, sec)->enclosing;
+
+ if (enclosing != NULL
+ && (coff_section_data (abfd, enclosing) == NULL
+ || coff_section_data (abfd, enclosing)->relocs == NULL)
+ && cache
+ && enclosing->reloc_count > 0)
+ {
+ if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
+ external_relocs, false,
+ (struct internal_reloc *) NULL)
+ == NULL)
+ return NULL;
+ }
+
+ if (enclosing != NULL
+ && coff_section_data (abfd, enclosing) != NULL
+ && coff_section_data (abfd, enclosing)->relocs != NULL)
+ {
+ size_t off;
+
+ off = ((sec->rel_filepos - enclosing->rel_filepos)
+ / bfd_coff_relsz (abfd));
+ if (! require_internal)
+ return coff_section_data (abfd, enclosing)->relocs + off;
+ memcpy (internal_relocs,
+ coff_section_data (abfd, enclosing)->relocs + off,
+ sec->reloc_count * sizeof (struct internal_reloc));
+ return internal_relocs;
+ }
+ }
+
+ return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
+ require_internal, internal_relocs);
+}
+
+/* Given an XCOFF BFD, add symbols to the global hash table as
+ appropriate. */
+
+boolean
+_bfd_xcoff_bfd_link_add_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ switch (bfd_get_format (abfd))
+ {
+ case bfd_object:
+ return xcoff_link_add_object_symbols (abfd, info);
+
+ case bfd_archive:
+ /* If the archive has a map, do the usual search. We then need
+ to check the archive for stripped dynamic objects, because
+ they will not appear in the archive map even though they
+ should, perhaps, be included. If the archive has no map, we
+ just consider each object file in turn, since that apparently
+ is what the AIX native linker does. */
+ if (bfd_has_map (abfd))
+ {
+ if (! (_bfd_generic_link_add_archive_symbols
+ (abfd, info, xcoff_link_check_archive_element)))
+ return false;
+ }
+
+ {
+ bfd *member;
+
+ member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
+ while (member != NULL)
+ {
+ if (bfd_check_format (member, bfd_object)
+ && (! bfd_has_map (abfd)
+ || ((member->flags & DYNAMIC) != 0
+ && (member->flags & HAS_SYMS) == 0)))
+ {
+ boolean needed;
+
+ if (! xcoff_link_check_archive_element (member, info, &needed))
+ return false;
+ if (needed)
+ member->archive_pass = -1;
+ }
+ member = bfd_openr_next_archived_file (abfd, member);
+ }
+ }
+
+ return true;
+
+ default:
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+}
+
+/* Add symbols from an XCOFF object file. */
+
+static boolean
+xcoff_link_add_object_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ if (! _bfd_coff_get_external_symbols (abfd))
+ return false;
+ if (! xcoff_link_add_symbols (abfd, info))
+ return false;
+ if (! info->keep_memory)
+ {
+ if (! _bfd_coff_free_symbols (abfd))
+ return false;
+ }
+ return true;
+}
+
+/* Check a single archive element to see if we need to include it in
+ the link. *PNEEDED is set according to whether this element is
+ needed in the link or not. This is called via
+ _bfd_generic_link_add_archive_symbols. */
+
+static boolean
+xcoff_link_check_archive_element (abfd, info, pneeded)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ boolean *pneeded;
+{
+ if (! _bfd_coff_get_external_symbols (abfd))
+ return false;
+
+ if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
+ return false;
+
+ if (*pneeded)
+ {
+ if (! xcoff_link_add_symbols (abfd, info))
+ return false;
+ }
+
+ if (! info->keep_memory || ! *pneeded)
+ {
+ if (! _bfd_coff_free_symbols (abfd))
+ return false;
+ }
+
+ return true;
+}
+
+/* Look through the symbols to see if this object file should be
+ included in the link. */
+
+static boolean
+xcoff_link_check_ar_symbols (abfd, info, pneeded)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ boolean *pneeded;
+{
+ bfd_size_type symesz;
+ bfd_byte *esym;
+ bfd_byte *esym_end;
+
+ *pneeded = false;
+
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link
+ && info->hash->creator == abfd->xvec)
+ return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
+
+ symesz = bfd_coff_symesz (abfd);
+ esym = (bfd_byte *) obj_coff_external_syms (abfd);
+ esym_end = esym + obj_raw_syment_count (abfd) * symesz;
+ while (esym < esym_end)
+ {
+ struct internal_syment sym;
+
+ bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
+
+ if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
+ {
+ const char *name;
+ char buf[SYMNMLEN + 1];
+ struct bfd_link_hash_entry *h;
+
+ /* This symbol is externally visible, and is defined by this
+ object file. */
+
+ name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
+ if (name == NULL)
+ return false;
+ h = bfd_link_hash_lookup (info->hash, name, false, false, true);
+
+ /* We are only interested in symbols that are currently
+ undefined. If a symbol is currently known to be common,
+ XCOFF linkers do not bring in an object file which
+ defines it. We also don't bring in symbols to satisfy
+ undefined references in shared objects. */
+ if (h != (struct bfd_link_hash_entry *) NULL
+ && h->type == bfd_link_hash_undefined
+ && (info->hash->creator != abfd->xvec
+ || (((struct xcoff_link_hash_entry *) h)->flags
+ & XCOFF_DEF_DYNAMIC) == 0))
+ {
+ if (! (*info->callbacks->add_archive_element) (info, abfd, name))
+ return false;
+ *pneeded = true;
+ return true;
+ }
+ }
+
+ esym += (sym.n_numaux + 1) * symesz;
+ }
+
+ /* We do not need this object file. */
+ return true;
+}
+
+/* Look through the loader symbols to see if this dynamic object
+ should be included in the link. The native linker uses the loader
+ symbols, not the normal symbol table, so we do too. */
+
+static boolean
+xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ boolean *pneeded;
+{
+ asection *lsec;
+ bfd_byte *buf;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+
+ *pneeded = false;
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ /* There are no symbols, so don't try to include it. */
+ return true;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return false;
+ buf = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
+
+ strings = (char *) buf + ldhdr.l_stoff;
+
+ elsym = (struct external_ldsym *) (buf + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ for (; elsym < elsymend; elsym++)
+ {
+ struct internal_ldsym ldsym;
+ char nambuf[SYMNMLEN + 1];
+ const char *name;
+ struct bfd_link_hash_entry *h;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ /* We are only interested in exported symbols. */
+ if ((ldsym.l_smtype & L_EXPORT) == 0)
+ continue;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
+ nambuf[SYMNMLEN] = '\0';
+ name = nambuf;
+ }
+
+ h = bfd_link_hash_lookup (info->hash, name, false, false, true);
+
+ /* We are only interested in symbols that are currently
+ undefined. At this point we know that we are using an XCOFF
+ hash table. */
+ if (h != NULL
+ && h->type == bfd_link_hash_undefined
+ && (((struct xcoff_link_hash_entry *) h)->flags
+ & XCOFF_DEF_DYNAMIC) == 0)
+ {
+ if (! (*info->callbacks->add_archive_element) (info, abfd, name))
+ return false;
+ *pneeded = true;
+ return true;
+ }
+ }
+
+ /* We do not need this shared object. */
+
+ if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
+ {
+ free (coff_section_data (abfd, lsec)->contents);
+ coff_section_data (abfd, lsec)->contents = NULL;
+ }
+
+ return true;
+}
+
+/* Returns the index of reloc in RELOCS with the least address greater
+ than or equal to ADDRESS. The relocs are sorted by address. */
+
+static bfd_size_type
+xcoff_find_reloc (relocs, count, address)
+ struct internal_reloc *relocs;
+ bfd_size_type count;
+ bfd_vma address;
+{
+ bfd_size_type min, max, this;
+
+ if (count < 2)
+ {
+ if (count == 1 && relocs[0].r_vaddr < address)
+ return 1;
+ else
+ return 0;
+ }
+
+ min = 0;
+ max = count;
+
+ /* Do a binary search over (min,max]. */
+ while (min + 1 < max)
+ {
+ bfd_vma raddr;
+
+ this = (max + min) / 2;
+ raddr = relocs[this].r_vaddr;
+ if (raddr > address)
+ max = this;
+ else if (raddr < address)
+ min = this;
+ else
+ {
+ min = this;
+ break;
+ }
+ }
+
+ if (relocs[min].r_vaddr < address)
+ return min + 1;
+
+ while (min > 0
+ && relocs[min - 1].r_vaddr == address)
+ --min;
+
+ return min;
+}
+
+/* Add all the symbols from an object file to the hash table.
+
+ XCOFF is a weird format. A normal XCOFF .o files will have three
+ COFF sections--.text, .data, and .bss--but each COFF section will
+ contain many csects. These csects are described in the symbol
+ table. From the linker's point of view, each csect must be
+ considered a section in its own right. For example, a TOC entry is
+ handled as a small XMC_TC csect. The linker must be able to merge
+ different TOC entries together, which means that it must be able to
+ extract the XMC_TC csects from the .data section of the input .o
+ file.
+
+ From the point of view of our linker, this is, of course, a hideous
+ nightmare. We cope by actually creating sections for each csect,
+ and discarding the original sections. We then have to handle the
+ relocation entries carefully, since the only way to tell which
+ csect they belong to is to examine the address. */
+
+static boolean
+xcoff_link_add_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ unsigned int n_tmask;
+ unsigned int n_btshft;
+ boolean default_copy;
+ bfd_size_type symcount;
+ struct xcoff_link_hash_entry **sym_hash;
+ asection **csect_cache;
+ bfd_size_type linesz;
+ asection *o;
+ asection *last_real;
+ boolean keep_syms;
+ asection *csect;
+ unsigned int csect_index;
+ asection *first_csect;
+ bfd_size_type symesz;
+ bfd_byte *esym;
+ bfd_byte *esym_end;
+ struct reloc_info_struct
+ {
+ struct internal_reloc *relocs;
+ asection **csects;
+ bfd_byte *linenos;
+ } *reloc_info = NULL;
+
+ keep_syms = obj_coff_keep_syms (abfd);
+
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link)
+ {
+ if (! xcoff_link_add_dynamic_symbols (abfd, info))
+ return false;
+ }
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ /* We need to build a .loader section, so we do it here. This
+ won't work if we're producing an XCOFF output file with no
+ XCOFF input files. FIXME. */
+ if (xcoff_hash_table (info)->loader_section == NULL)
+ {
+ asection *lsec;
+
+ lsec = bfd_make_section_anyway (abfd, ".loader");
+ if (lsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->loader_section = lsec;
+ lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+ }
+ /* Likewise for the linkage section. */
+ if (xcoff_hash_table (info)->linkage_section == NULL)
+ {
+ asection *lsec;
+
+ lsec = bfd_make_section_anyway (abfd, ".gl");
+ if (lsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->linkage_section = lsec;
+ lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ lsec->alignment_power = 2;
+ }
+ /* Likewise for the TOC section. */
+ if (xcoff_hash_table (info)->toc_section == NULL)
+ {
+ asection *tsec;
+
+ tsec = bfd_make_section_anyway (abfd, ".tc");
+ if (tsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->toc_section = tsec;
+ tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ tsec->alignment_power = 2;
+ }
+ /* Likewise for the descriptor section. */
+ if (xcoff_hash_table (info)->descriptor_section == NULL)
+ {
+ asection *dsec;
+
+ dsec = bfd_make_section_anyway (abfd, ".ds");
+ if (dsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->descriptor_section = dsec;
+ dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ dsec->alignment_power = 2;
+ }
+ /* Likewise for the .debug section. */
+ if (xcoff_hash_table (info)->debug_section == NULL
+ && info->strip != strip_all)
+ {
+ asection *dsec;
+
+ dsec = bfd_make_section_anyway (abfd, ".debug");
+ if (dsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->debug_section = dsec;
+ dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+ }
+ }
+
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link)
+ return true;
+
+ n_tmask = coff_data (abfd)->local_n_tmask;
+ n_btshft = coff_data (abfd)->local_n_btshft;
+
+ /* Define macros so that ISFCN, et. al., macros work correctly. */
+#define N_TMASK n_tmask
+#define N_BTSHFT n_btshft
+
+ if (info->keep_memory)
+ default_copy = false;
+ else
+ default_copy = true;
+
+ symcount = obj_raw_syment_count (abfd);
+
+ /* We keep a list of the linker hash table entries that correspond
+ to each external symbol. */
+ sym_hash = ((struct xcoff_link_hash_entry **)
+ bfd_alloc (abfd,
+ (symcount
+ * sizeof (struct xcoff_link_hash_entry *))));
+ if (sym_hash == NULL && symcount != 0)
+ goto error_return;
+ coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
+ memset (sym_hash, 0,
+ (size_t) symcount * sizeof (struct xcoff_link_hash_entry *));
+
+ /* Because of the weird stuff we are doing with XCOFF csects, we can
+ not easily determine which section a symbol is in, so we store
+ the information in the tdata for the input file. */
+ csect_cache = ((asection **)
+ bfd_alloc (abfd, symcount * sizeof (asection *)));
+ if (csect_cache == NULL && symcount != 0)
+ goto error_return;
+ xcoff_data (abfd)->csects = csect_cache;
+ memset (csect_cache, 0, (size_t) symcount * sizeof (asection *));
+
+ /* While splitting sections into csects, we need to assign the
+ relocs correctly. The relocs and the csects must both be in
+ order by VMA within a given section, so we handle this by
+ scanning along the relocs as we process the csects. We index
+ into reloc_info using the section target_index. */
+ reloc_info = ((struct reloc_info_struct *)
+ bfd_malloc ((abfd->section_count + 1)
+ * sizeof (struct reloc_info_struct)));
+ if (reloc_info == NULL)
+ goto error_return;
+ memset ((PTR) reloc_info, 0,
+ (abfd->section_count + 1) * sizeof (struct reloc_info_struct));
+
+ /* Read in the relocs and line numbers for each section. */
+ linesz = bfd_coff_linesz (abfd);
+ last_real = NULL;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ last_real = o;
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ reloc_info[o->target_index].relocs =
+ xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL,
+ false, (struct internal_reloc *) NULL);
+ reloc_info[o->target_index].csects =
+ (asection **) bfd_malloc (o->reloc_count * sizeof (asection *));
+ if (reloc_info[o->target_index].csects == NULL)
+ goto error_return;
+ memset (reloc_info[o->target_index].csects, 0,
+ o->reloc_count * sizeof (asection *));
+ }
+
+ if ((info->strip == strip_none || info->strip == strip_some)
+ && o->lineno_count > 0)
+ {
+ bfd_byte *linenos;
+
+ linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz);
+ if (linenos == NULL)
+ goto error_return;
+ reloc_info[o->target_index].linenos = linenos;
+ if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
+ || (bfd_read (linenos, linesz, o->lineno_count, abfd)
+ != linesz * o->lineno_count))
+ goto error_return;
+ }
+ }
+
+ /* Don't let the linker relocation routines discard the symbols. */
+ obj_coff_keep_syms (abfd) = true;
+
+ csect = NULL;
+ csect_index = 0;
+ first_csect = NULL;
+
+ symesz = bfd_coff_symesz (abfd);
+ BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
+ esym = (bfd_byte *) obj_coff_external_syms (abfd);
+ esym_end = esym + symcount * symesz;
+ while (esym < esym_end)
+ {
+ struct internal_syment sym;
+ union internal_auxent aux;
+ const char *name;
+ char buf[SYMNMLEN + 1];
+ int smtyp;
+ flagword flags;
+ asection *section;
+ bfd_vma value;
+ struct xcoff_link_hash_entry *set_toc;
+
+ bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
+
+ /* In this pass we are only interested in symbols with csect
+ information. */
+ if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
+ {
+ if (sym.n_sclass == C_FILE && csect != NULL)
+ {
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+ csect = NULL;
+ }
+
+ if (csect != NULL)
+ *csect_cache = csect;
+ else if (first_csect == NULL || sym.n_sclass == C_FILE)
+ *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
+ else
+ *csect_cache = NULL;
+ esym += (sym.n_numaux + 1) * symesz;
+ sym_hash += sym.n_numaux + 1;
+ csect_cache += sym.n_numaux + 1;
+ continue;
+ }
+
+ name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
+ if (name == NULL)
+ goto error_return;
+
+ /* If this symbol has line number information attached to it,
+ and we're not stripping it, count the number of entries and
+ add them to the count for this csect. In the final link pass
+ we are going to attach line number information by symbol,
+ rather than by section, in order to more easily handle
+ garbage collection. */
+ if ((info->strip == strip_none || info->strip == strip_some)
+ && sym.n_numaux > 1
+ && csect != NULL
+ && ISFCN (sym.n_type))
+ {
+ union internal_auxent auxlin;
+
+ bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
+ sym.n_type, sym.n_sclass,
+ 0, sym.n_numaux, (PTR) &auxlin);
+ if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
+ {
+ asection *enclosing;
+ bfd_size_type linoff;
+
+ enclosing = xcoff_section_data (abfd, csect)->enclosing;
+ if (enclosing == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' has line numbers but no enclosing section"),
+ bfd_get_filename (abfd), name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
+ - enclosing->line_filepos);
+ if (linoff < enclosing->lineno_count * linesz)
+ {
+ struct internal_lineno lin;
+ bfd_byte *linpstart;
+
+ linpstart = (reloc_info[enclosing->target_index].linenos
+ + linoff);
+ bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
+ if (lin.l_lnno == 0
+ && ((bfd_size_type) lin.l_addr.l_symndx
+ == ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz)))
+ {
+ bfd_byte *linpend, *linp;
+
+ linpend = (reloc_info[enclosing->target_index].linenos
+ + enclosing->lineno_count * linesz);
+ for (linp = linpstart + linesz;
+ linp < linpend;
+ linp += linesz)
+ {
+ bfd_coff_swap_lineno_in (abfd, (PTR) linp,
+ (PTR) &lin);
+ if (lin.l_lnno == 0)
+ break;
+ }
+ csect->lineno_count += (linp - linpstart) / linesz;
+ /* The setting of line_filepos will only be
+ useful if all the line number entries for a
+ csect are contiguous; this only matters for
+ error reporting. */
+ if (csect->line_filepos == 0)
+ csect->line_filepos =
+ auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
+ }
+ }
+ }
+ }
+
+ /* Pick up the csect auxiliary information. */
+
+ if (sym.n_numaux == 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: class %d symbol `%s' has no aux entries"),
+ bfd_get_filename (abfd), sym.n_sclass, name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ bfd_coff_swap_aux_in (abfd,
+ (PTR) (esym + symesz * sym.n_numaux),
+ sym.n_type, sym.n_sclass,
+ sym.n_numaux - 1, sym.n_numaux,
+ (PTR) &aux);
+
+ smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
+
+ flags = BSF_GLOBAL;
+ section = NULL;
+ value = 0;
+ set_toc = NULL;
+
+ switch (smtyp)
+ {
+ default:
+ (*_bfd_error_handler)
+ (_("%s: symbol `%s' has unrecognized csect type %d"),
+ bfd_get_filename (abfd), name, smtyp);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+
+ case XTY_ER:
+ /* This is an external reference. */
+ if (sym.n_sclass == C_HIDEXT
+ || sym.n_scnum != N_UNDEF
+ || aux.x_csect.x_scnlen.l != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"),
+ bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum,
+ aux.x_csect.x_scnlen.l);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ /* An XMC_XO external reference is actually a reference to
+ an absolute location. */
+ if (aux.x_csect.x_smclas != XMC_XO)
+ section = bfd_und_section_ptr;
+ else
+ {
+ section = bfd_abs_section_ptr;
+ value = sym.n_value;
+ }
+ break;
+
+ case XTY_SD:
+ /* This is a csect definition. */
+
+ if (csect != NULL)
+ {
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+ }
+
+ csect = NULL;
+ csect_index = -1;
+
+ /* When we see a TOC anchor, we record the TOC value. */
+ if (aux.x_csect.x_smclas == XMC_TC0)
+ {
+ if (sym.n_sclass != C_HIDEXT
+ || aux.x_csect.x_scnlen.l != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"),
+ bfd_get_filename (abfd), name, sym.n_sclass,
+ aux.x_csect.x_scnlen.l);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ xcoff_data (abfd)->toc = sym.n_value;
+ }
+
+ /* We must merge TOC entries for the same symbol. We can
+ merge two TOC entries if they are both C_HIDEXT, they
+ both have the same name, they are both 4 bytes long, and
+ they both have a relocation table entry for an external
+ symbol with the same name. Unfortunately, this means
+ that we must look through the relocations. Ick. */
+ if (aux.x_csect.x_smclas == XMC_TC
+ && sym.n_sclass == C_HIDEXT
+ && aux.x_csect.x_scnlen.l == 4
+ && info->hash->creator == abfd->xvec)
+ {
+ asection *enclosing;
+ struct internal_reloc *relocs;
+ bfd_size_type relindx;
+ struct internal_reloc *rel;
+
+ enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
+ if (enclosing == NULL)
+ goto error_return;
+
+ relocs = reloc_info[enclosing->target_index].relocs;
+ relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
+ sym.n_value);
+ rel = relocs + relindx;
+ if (relindx < enclosing->reloc_count
+ && rel->r_vaddr == (bfd_vma) sym.n_value
+ && rel->r_size == 31
+ && rel->r_type == R_POS)
+ {
+ bfd_byte *erelsym;
+ struct internal_syment relsym;
+
+ erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
+ + rel->r_symndx * symesz);
+ bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
+ if (relsym.n_sclass == C_EXT)
+ {
+ const char *relname;
+ char relbuf[SYMNMLEN + 1];
+ boolean copy;
+ struct xcoff_link_hash_entry *h;
+
+ /* At this point we know that the TOC entry is
+ for an externally visible symbol. */
+ relname = _bfd_coff_internal_syment_name (abfd, &relsym,
+ relbuf);
+ if (relname == NULL)
+ goto error_return;
+
+ /* We only merge TOC entries if the TC name is
+ the same as the symbol name. This handles
+ the normal case, but not common cases like
+ SYM.P4 which gcc generates to store SYM + 4
+ in the TOC. FIXME. */
+ if (strcmp (name, relname) == 0)
+ {
+ copy = (! info->keep_memory
+ || relsym._n._n_n._n_zeroes != 0
+ || relsym._n._n_n._n_offset == 0);
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ relname, true, copy,
+ false);
+ if (h == NULL)
+ goto error_return;
+
+ /* At this point h->root.type could be
+ bfd_link_hash_new. That should be OK,
+ since we know for sure that we will come
+ across this symbol as we step through the
+ file. */
+
+ /* We store h in *sym_hash for the
+ convenience of the relocate_section
+ function. */
+ *sym_hash = h;
+
+ if (h->toc_section != NULL)
+ {
+ asection **rel_csects;
+
+ /* We already have a TOC entry for this
+ symbol, so we can just ignore this
+ one. */
+ rel_csects =
+ reloc_info[enclosing->target_index].csects;
+ rel_csects[relindx] = bfd_und_section_ptr;
+ break;
+ }
+
+ /* We are about to create a TOC entry for
+ this symbol. */
+ set_toc = h;
+ }
+ }
+ }
+ }
+
+ /* We need to create a new section. We get the name from
+ the csect storage mapping class, so that the linker can
+ accumulate similar csects together. */
+ {
+ static const char *csect_name_by_class[] =
+ {
+ ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo",
+ ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0",
+ ".td"
+ };
+ const char *csect_name;
+ asection *enclosing;
+
+ if ((aux.x_csect.x_smclas >=
+ sizeof csect_name_by_class / sizeof csect_name_by_class[0])
+ || csect_name_by_class[aux.x_csect.x_smclas] == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: symbol `%s' has unrecognized smclas %d"),
+ bfd_get_filename (abfd), name, aux.x_csect.x_smclas);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ csect_name = csect_name_by_class[aux.x_csect.x_smclas];
+ csect = bfd_make_section_anyway (abfd, csect_name);
+ if (csect == NULL)
+ goto error_return;
+ enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
+ if (enclosing == NULL)
+ goto error_return;
+ if (! bfd_is_abs_section (enclosing)
+ && ((bfd_vma) sym.n_value < enclosing->vma
+ || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
+ > enclosing->vma + enclosing->_raw_size)))
+ {
+ (*_bfd_error_handler)
+ (_("%s: csect `%s' not in enclosing section"),
+ bfd_get_filename (abfd), name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ csect->vma = sym.n_value;
+ csect->filepos = (enclosing->filepos
+ + sym.n_value
+ - enclosing->vma);
+ csect->_raw_size = aux.x_csect.x_scnlen.l;
+ csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
+ csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
+
+ /* Record the enclosing section in the tdata for this new
+ section. */
+ csect->used_by_bfd =
+ (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
+ if (csect->used_by_bfd == NULL)
+ goto error_return;
+ coff_section_data (abfd, csect)->tdata =
+ bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
+ if (coff_section_data (abfd, csect)->tdata == NULL)
+ goto error_return;
+ xcoff_section_data (abfd, csect)->enclosing = enclosing;
+ xcoff_section_data (abfd, csect)->lineno_count =
+ enclosing->lineno_count;
+
+ if (enclosing->owner == abfd)
+ {
+ struct internal_reloc *relocs;
+ bfd_size_type relindx;
+ struct internal_reloc *rel;
+ asection **rel_csect;
+
+ relocs = reloc_info[enclosing->target_index].relocs;
+ relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
+ csect->vma);
+ rel = relocs + relindx;
+ rel_csect = (reloc_info[enclosing->target_index].csects
+ + relindx);
+ csect->rel_filepos = (enclosing->rel_filepos
+ + relindx * bfd_coff_relsz (abfd));
+ while (relindx < enclosing->reloc_count
+ && *rel_csect == NULL
+ && rel->r_vaddr < csect->vma + csect->_raw_size)
+ {
+ *rel_csect = csect;
+ csect->flags |= SEC_RELOC;
+ ++csect->reloc_count;
+ ++relindx;
+ ++rel;
+ ++rel_csect;
+ }
+ }
+
+ /* There are a number of other fields and section flags
+ which we do not bother to set. */
+
+ csect_index = ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+
+ xcoff_section_data (abfd, csect)->first_symndx = csect_index;
+
+ if (first_csect == NULL)
+ first_csect = csect;
+
+ /* If this symbol is C_EXT, we treat it as starting at the
+ beginning of the newly created section. */
+ if (sym.n_sclass == C_EXT)
+ {
+ section = csect;
+ value = 0;
+ }
+
+ /* If this is a TOC section for a symbol, record it. */
+ if (set_toc != NULL)
+ set_toc->toc_section = csect;
+ }
+ break;
+
+ case XTY_LD:
+ /* This is a label definition. The x_scnlen field is the
+ symbol index of the csect. I believe that this must
+ always follow the appropriate XTY_SD symbol, so I will
+ insist on it. */
+ {
+ boolean bad;
+
+ bad = false;
+ if (aux.x_csect.x_scnlen.l < 0
+ || (aux.x_csect.x_scnlen.l
+ >= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
+ bad = true;
+ if (! bad)
+ {
+ section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
+ if (section == NULL
+ || (section->flags & SEC_HAS_CONTENTS) == 0)
+ bad = true;
+ }
+ if (bad)
+ {
+ (*_bfd_error_handler)
+ (_("%s: misplaced XTY_LD `%s'"),
+ bfd_get_filename (abfd), name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ value = sym.n_value - csect->vma;
+ }
+ break;
+
+ case XTY_CM:
+ /* This is an unitialized csect. We could base the name on
+ the storage mapping class, but we don't bother except for
+ an XMC_TD symbol. If this csect is externally visible,
+ it is a common symbol. We put XMC_TD symbols in sections
+ named .tocbss, and rely on the linker script to put that
+ in the TOC area. */
+
+ if (csect != NULL)
+ {
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+ }
+
+ if (aux.x_csect.x_smclas == XMC_TD)
+ csect = bfd_make_section_anyway (abfd, ".tocbss");
+ else
+ csect = bfd_make_section_anyway (abfd, ".bss");
+ if (csect == NULL)
+ goto error_return;
+ csect->vma = sym.n_value;
+ csect->_raw_size = aux.x_csect.x_scnlen.l;
+ csect->flags |= SEC_ALLOC;
+ csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
+ /* There are a number of other fields and section flags
+ which we do not bother to set. */
+
+ csect_index = ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+
+ csect->used_by_bfd =
+ (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
+ if (csect->used_by_bfd == NULL)
+ goto error_return;
+ coff_section_data (abfd, csect)->tdata =
+ bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
+ if (coff_section_data (abfd, csect)->tdata == NULL)
+ goto error_return;
+ xcoff_section_data (abfd, csect)->first_symndx = csect_index;
+
+ if (first_csect == NULL)
+ first_csect = csect;
+
+ if (sym.n_sclass == C_EXT)
+ {
+ csect->flags |= SEC_IS_COMMON;
+ csect->_raw_size = 0;
+ section = csect;
+ value = aux.x_csect.x_scnlen.l;
+ }
+
+ break;
+ }
+
+ /* Check for magic symbol names. */
+ if ((smtyp == XTY_SD || smtyp == XTY_CM)
+ && aux.x_csect.x_smclas != XMC_TC
+ && aux.x_csect.x_smclas != XMC_TD)
+ {
+ int i;
+
+ i = -1;
+ if (name[0] == '_')
+ {
+ if (strcmp (name, "_text") == 0)
+ i = 0;
+ else if (strcmp (name, "_etext") == 0)
+ i = 1;
+ else if (strcmp (name, "_data") == 0)
+ i = 2;
+ else if (strcmp (name, "_edata") == 0)
+ i = 3;
+ else if (strcmp (name, "_end") == 0)
+ i = 4;
+ }
+ else if (name[0] == 'e' && strcmp (name, "end") == 0)
+ i = 5;
+
+ if (i != -1)
+ xcoff_hash_table (info)->special_sections[i] = csect;
+ }
+
+ /* Now we have enough information to add the symbol to the
+ linker hash table. */
+
+ if (sym.n_sclass == C_EXT)
+ {
+ boolean copy;
+
+ BFD_ASSERT (section != NULL);
+
+ /* We must copy the name into memory if we got it from the
+ syment itself, rather than the string table. */
+ copy = default_copy;
+ if (sym._n._n_n._n_zeroes != 0
+ || sym._n._n_n._n_offset == 0)
+ copy = true;
+
+ /* The AIX linker appears to only detect multiple symbol
+ definitions when there is a reference to the symbol. If
+ a symbol is defined multiple times, and the only
+ references are from the same object file, the AIX linker
+ appears to permit it. It does not merge the different
+ definitions, but handles them independently. On the
+ other hand, if there is a reference, the linker reports
+ an error.
+
+ This matters because the AIX <net/net_globals.h> header
+ file actually defines an initialized array, so we have to
+ actually permit that to work.
+
+ Just to make matters even more confusing, the AIX linker
+ appears to permit multiple symbol definitions whenever
+ the second definition is in an archive rather than an
+ object file. This may be a consequence of the manner in
+ which it handles archives: I think it may load the entire
+ archive in as separate csects, and then let garbage
+ collection discard symbols.
+
+ We also have to handle the case of statically linking a
+ shared object, which will cause symbol redefinitions,
+ although this is an easier case to detect. */
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ if (! bfd_is_und_section (section))
+ *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ name, true, copy, false);
+ else
+ *sym_hash = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (abfd, info, name,
+ true, copy, false));
+ if (*sym_hash == NULL)
+ goto error_return;
+ if (((*sym_hash)->root.type == bfd_link_hash_defined
+ || (*sym_hash)->root.type == bfd_link_hash_defweak)
+ && ! bfd_is_und_section (section)
+ && ! bfd_is_com_section (section))
+ {
+ /* This is a second definition of a defined symbol. */
+ if ((abfd->flags & DYNAMIC) != 0
+ && ((*sym_hash)->smclas != XMC_GL
+ || aux.x_csect.x_smclas == XMC_GL
+ || ((*sym_hash)->root.u.def.section->owner->flags
+ & DYNAMIC) == 0))
+ {
+ /* The new symbol is from a shared library, and
+ either the existing symbol is not global
+ linkage code or this symbol is global linkage
+ code. If the existing symbol is global
+ linkage code and the new symbol is not, then
+ we want to use the new symbol. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ }
+ else if (((*sym_hash)->root.u.def.section->owner->flags
+ & DYNAMIC) != 0)
+ {
+ /* The existing symbol is from a shared library.
+ Replace it. */
+ (*sym_hash)->root.type = bfd_link_hash_undefined;
+ (*sym_hash)->root.u.undef.abfd =
+ (*sym_hash)->root.u.def.section->owner;
+ }
+ else if (abfd->my_archive != NULL)
+ {
+ /* This is a redefinition in an object contained
+ in an archive. Just ignore it. See the
+ comment above. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ }
+ else if ((*sym_hash)->root.next != NULL
+ || info->hash->undefs_tail == &(*sym_hash)->root)
+ {
+ /* This symbol has been referenced. In this
+ case, we just continue and permit the
+ multiple definition error. See the comment
+ above about the behaviour of the AIX linker. */
+ }
+ else if ((*sym_hash)->smclas == aux.x_csect.x_smclas)
+ {
+ /* The symbols are both csects of the same
+ class. There is at least a chance that this
+ is a semi-legitimate redefinition. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED;
+ }
+ }
+ else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0
+ && ((*sym_hash)->root.type == bfd_link_hash_defined
+ || (*sym_hash)->root.type == bfd_link_hash_defweak)
+ && (bfd_is_und_section (section)
+ || bfd_is_com_section (section)))
+ {
+ /* This is a reference to a multiply defined symbol.
+ Report the error now. See the comment above
+ about the behaviour of the AIX linker. We could
+ also do this with warning symbols, but I'm not
+ sure the XCOFF linker is wholly prepared to
+ handle them, and that would only be a warning,
+ not an error. */
+ if (! ((*info->callbacks->multiple_definition)
+ (info, (*sym_hash)->root.root.string,
+ (bfd *) NULL, (asection *) NULL, 0,
+ (*sym_hash)->root.u.def.section->owner,
+ (*sym_hash)->root.u.def.section,
+ (*sym_hash)->root.u.def.value)))
+ goto error_return;
+ /* Try not to give this error too many times. */
+ (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED;
+ }
+ }
+
+ /* _bfd_generic_link_add_one_symbol may call the linker to
+ generate an error message, and the linker may try to read
+ the symbol table to give a good error. Right now, the
+ line numbers are in an inconsistent state, since they are
+ counted both in the real sections and in the new csects.
+ We need to leave the count in the real sections so that
+ the linker can report the line number of the error
+ correctly, so temporarily clobber the link to the csects
+ so that the linker will not try to read the line numbers
+ a second time from the csects. */
+ BFD_ASSERT (last_real->next == first_csect);
+ last_real->next = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, name, flags, section, value,
+ (const char *) NULL, copy, true,
+ (struct bfd_link_hash_entry **) sym_hash)))
+ goto error_return;
+ last_real->next = first_csect;
+
+ if (smtyp == XTY_CM)
+ {
+ if ((*sym_hash)->root.type != bfd_link_hash_common
+ || (*sym_hash)->root.u.c.p->section != csect)
+ {
+ /* We don't need the common csect we just created. */
+ csect->_raw_size = 0;
+ }
+ else
+ {
+ (*sym_hash)->root.u.c.p->alignment_power
+ = csect->alignment_power;
+ }
+ }
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ int flag;
+
+ if (smtyp == XTY_ER || smtyp == XTY_CM)
+ flag = XCOFF_REF_REGULAR;
+ else
+ flag = XCOFF_DEF_REGULAR;
+ (*sym_hash)->flags |= flag;
+
+ if ((*sym_hash)->smclas == XMC_UA
+ || flag == XCOFF_DEF_REGULAR)
+ (*sym_hash)->smclas = aux.x_csect.x_smclas;
+ }
+ }
+
+ *csect_cache = csect;
+
+ esym += (sym.n_numaux + 1) * symesz;
+ sym_hash += sym.n_numaux + 1;
+ csect_cache += sym.n_numaux + 1;
+ }
+
+ BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
+
+ /* Make sure that we have seen all the relocs. */
+ for (o = abfd->sections; o != first_csect; o = o->next)
+ {
+ /* Reset the section size and the line number count, since the
+ data is now attached to the csects. Don't reset the size of
+ the .debug section, since we need to read it below in
+ bfd_xcoff_size_dynamic_sections. */
+ if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
+ o->_raw_size = 0;
+ o->lineno_count = 0;
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ bfd_size_type i;
+ struct internal_reloc *rel;
+ asection **rel_csect;
+
+ rel = reloc_info[o->target_index].relocs;
+ rel_csect = reloc_info[o->target_index].csects;
+ for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
+ {
+ if (*rel_csect == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: reloc %s:%d not in csect"),
+ bfd_get_filename (abfd), o->name, i);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ /* We identify all symbols which are called, so that we
+ can create glue code for calls to functions imported
+ from dynamic objects. */
+ if (info->hash->creator == abfd->xvec
+ && *rel_csect != bfd_und_section_ptr
+ && (rel->r_type == R_BR
+ || rel->r_type == R_RBR)
+ && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
+ {
+ struct xcoff_link_hash_entry *h;
+
+ h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
+ h->flags |= XCOFF_CALLED;
+ /* If the symbol name starts with a period, it is
+ the code of a function. If the symbol is
+ currently undefined, then add an undefined symbol
+ for the function descriptor. This should do no
+ harm, because any regular object that defines the
+ function should also define the function
+ descriptor. It helps, because it means that we
+ will identify the function descriptor with a
+ dynamic object if a dynamic object defines it. */
+ if (h->root.root.string[0] == '.'
+ && h->descriptor == NULL)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ h->root.root.string + 1,
+ true, false, true);
+ if (hds == NULL)
+ goto error_return;
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, hds->root.root.string,
+ (flagword) 0, bfd_und_section_ptr,
+ (bfd_vma) 0, (const char *) NULL, false,
+ true,
+ (struct bfd_link_hash_entry **) &hds)))
+ goto error_return;
+ }
+ hds->flags |= XCOFF_DESCRIPTOR;
+ BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
+ && (h->flags & XCOFF_DESCRIPTOR) == 0);
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+ }
+ }
+
+ free (reloc_info[o->target_index].csects);
+ reloc_info[o->target_index].csects = NULL;
+
+ /* Reset SEC_RELOC and the reloc_count, since the reloc
+ information is now attached to the csects. */
+ o->flags &=~ SEC_RELOC;
+ o->reloc_count = 0;
+
+ /* If we are not keeping memory, free the reloc information. */
+ if (! info->keep_memory
+ && coff_section_data (abfd, o) != NULL
+ && coff_section_data (abfd, o)->relocs != NULL
+ && ! coff_section_data (abfd, o)->keep_relocs)
+ {
+ free (coff_section_data (abfd, o)->relocs);
+ coff_section_data (abfd, o)->relocs = NULL;
+ }
+ }
+
+ /* Free up the line numbers. FIXME: We could cache these
+ somewhere for the final link, to avoid reading them again. */
+ if (reloc_info[o->target_index].linenos != NULL)
+ {
+ free (reloc_info[o->target_index].linenos);
+ reloc_info[o->target_index].linenos = NULL;
+ }
+ }
+
+ free (reloc_info);
+
+ obj_coff_keep_syms (abfd) = keep_syms;
+
+ return true;
+
+ error_return:
+ if (reloc_info != NULL)
+ {
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (reloc_info[o->target_index].csects != NULL)
+ free (reloc_info[o->target_index].csects);
+ if (reloc_info[o->target_index].linenos != NULL)
+ free (reloc_info[o->target_index].linenos);
+ }
+ free (reloc_info);
+ }
+ obj_coff_keep_syms (abfd) = keep_syms;
+ return false;
+}
+
+#undef N_TMASK
+#undef N_BTSHFT
+
+/* This function is used to add symbols from a dynamic object to the
+ global symbol table. */
+
+static boolean
+xcoff_link_add_dynamic_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ asection *lsec;
+ bfd_byte *buf;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+ struct xcoff_import_file *n;
+ const char *bname;
+ const char *mname;
+ const char *s;
+ unsigned int c;
+ struct xcoff_import_file **pp;
+
+ /* We can only handle a dynamic object if we are generating an XCOFF
+ output file. */
+ if (info->hash->creator != abfd->xvec)
+ {
+ (*_bfd_error_handler)
+ (_("%s: XCOFF shared object when not producing XCOFF output"),
+ bfd_get_filename (abfd));
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ /* The symbols we use from a dynamic object are not the symbols in
+ the normal symbol table, but, rather, the symbols in the export
+ table. If there is a global symbol in a dynamic object which is
+ not in the export table, the loader will not be able to find it,
+ so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
+ libc.a has symbols in the export table which are not in the
+ symbol table. */
+
+ /* Read in the .loader section. FIXME: We should really use the
+ o_snloader field in the a.out header, rather than grabbing the
+ section by name. */
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: dynamic object with no .loader section"),
+ bfd_get_filename (abfd));
+ bfd_set_error (bfd_error_no_symbols);
+ return false;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return false;
+ buf = coff_section_data (abfd, lsec)->contents;
+
+ /* Remove the sections from this object, so that they do not get
+ included in the link. */
+ abfd->sections = NULL;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
+
+ strings = (char *) buf + ldhdr.l_stoff;
+
+ elsym = (struct external_ldsym *) (buf + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ);
+ for (; elsym < elsymend; elsym++)
+ {
+ struct internal_ldsym ldsym;
+ char nambuf[SYMNMLEN + 1];
+ const char *name;
+ struct xcoff_link_hash_entry *h;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ /* We are only interested in exported symbols. */
+ if ((ldsym.l_smtype & L_EXPORT) == 0)
+ continue;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
+ nambuf[SYMNMLEN] = '\0';
+ name = nambuf;
+ }
+
+ /* Normally we could not call xcoff_link_hash_lookup in an add
+ symbols routine, since we might not be using an XCOFF hash
+ table. However, we verified above that we are using an XCOFF
+ hash table. */
+
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
+ true, true);
+ if (h == NULL)
+ return false;
+
+ h->flags |= XCOFF_DEF_DYNAMIC;
+
+ /* If the symbol is undefined, and the BFD it was found in is
+ not a dynamic object, change the BFD to this dynamic object,
+ so that we can get the correct import file ID. */
+ if ((h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && (h->root.u.undef.abfd == NULL
+ || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
+ h->root.u.undef.abfd = abfd;
+
+ if (h->root.type == bfd_link_hash_new)
+ {
+ h->root.type = bfd_link_hash_undefined;
+ h->root.u.undef.abfd = abfd;
+ /* We do not want to add this to the undefined symbol list. */
+ }
+
+ if (h->smclas == XMC_UA
+ || h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ h->smclas = ldsym.l_smclas;
+
+ /* Unless this is an XMC_XO symbol, we don't bother to actually
+ define it, since we don't have a section to put it in anyhow.
+ Instead, the relocation routines handle the DEF_DYNAMIC flag
+ correctly. */
+
+ if (h->smclas == XMC_XO
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ /* This symbol has an absolute value. */
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = ldsym.l_value;
+ }
+
+ /* If this symbol defines a function descriptor, then it
+ implicitly defines the function code as well. */
+ if (h->smclas == XMC_DS
+ || (h->smclas == XMC_XO && name[0] != '.'))
+ h->flags |= XCOFF_DESCRIPTOR;
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = h->descriptor;
+ if (hds == NULL)
+ {
+ char *dsnm;
+
+ dsnm = bfd_malloc (strlen (name) + 2);
+ if (dsnm == NULL)
+ return false;
+ dsnm[0] = '.';
+ strcpy (dsnm + 1, name);
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm,
+ true, true, true);
+ free (dsnm);
+ if (hds == NULL)
+ return false;
+
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ hds->root.type = bfd_link_hash_undefined;
+ hds->root.u.undef.abfd = abfd;
+ /* We do not want to add this to the undefined
+ symbol list. */
+ }
+
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+
+ hds->flags |= XCOFF_DEF_DYNAMIC;
+ if (hds->smclas == XMC_UA)
+ hds->smclas = XMC_PR;
+
+ /* An absolute symbol appears to actually define code, not a
+ function descriptor. This is how some math functions are
+ implemented on AIX 4.1. */
+ if (h->smclas == XMC_XO
+ && (hds->root.type == bfd_link_hash_undefined
+ || hds->root.type == bfd_link_hash_undefweak))
+ {
+ hds->smclas = XMC_XO;
+ hds->root.type = bfd_link_hash_defined;
+ hds->root.u.def.section = bfd_abs_section_ptr;
+ hds->root.u.def.value = ldsym.l_value;
+ }
+ }
+ }
+
+ if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
+ {
+ free (coff_section_data (abfd, lsec)->contents);
+ coff_section_data (abfd, lsec)->contents = NULL;
+ }
+
+ /* Record this file in the import files. */
+
+ n = ((struct xcoff_import_file *)
+ bfd_alloc (abfd, sizeof (struct xcoff_import_file)));
+ if (n == NULL)
+ return false;
+ n->next = NULL;
+
+ /* For some reason, the path entry in the import file list for a
+ shared object appears to always be empty. The file name is the
+ base name. */
+ n->path = "";
+ if (abfd->my_archive == NULL)
+ {
+ bname = bfd_get_filename (abfd);
+ mname = "";
+ }
+ else
+ {
+ bname = bfd_get_filename (abfd->my_archive);
+ mname = bfd_get_filename (abfd);
+ }
+ s = strrchr (bname, '/');
+ if (s != NULL)
+ bname = s + 1;
+ n->file = bname;
+ n->member = mname;
+
+ /* We start c at 1 because the first import file number is reserved
+ for LIBPATH. */
+ for (pp = &xcoff_hash_table (info)->imports, c = 1;
+ *pp != NULL;
+ pp = &(*pp)->next, ++c)
+ ;
+ *pp = n;
+
+ xcoff_data (abfd)->import_file_id = c;
+
+ return true;
+}
+
+/* Routines that are called after all the input files have been
+ handled, but before the sections are laid out in memory. */
+
+/* Mark a symbol as not being garbage, including the section in which
+ it is defined. */
+
+static INLINE boolean
+xcoff_mark_symbol (info, h)
+ struct bfd_link_info *info;
+ struct xcoff_link_hash_entry *h;
+{
+ if ((h->flags & XCOFF_MARK) != 0)
+ return true;
+
+ h->flags |= XCOFF_MARK;
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *hsec;
+
+ hsec = h->root.u.def.section;
+ if (! bfd_is_abs_section (hsec)
+ && (hsec->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, hsec))
+ return false;
+ }
+ }
+
+ if (h->toc_section != NULL
+ && (h->toc_section->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, h->toc_section))
+ return false;
+ }
+
+ return true;
+}
+
+/* The mark phase of garbage collection. For a given section, mark
+ it, and all the sections which define symbols to which it refers.
+ Because this function needs to look at the relocs, we also count
+ the number of relocs which need to be copied into the .loader
+ section. */
+
+static boolean
+xcoff_mark (info, sec)
+ struct bfd_link_info *info;
+ asection *sec;
+{
+ if (bfd_is_abs_section (sec)
+ || (sec->flags & SEC_MARK) != 0)
+ return true;
+
+ sec->flags |= SEC_MARK;
+
+ if (sec->owner->xvec == info->hash->creator
+ && coff_section_data (sec->owner, sec) != NULL
+ && xcoff_section_data (sec->owner, sec) != NULL)
+ {
+ register struct xcoff_link_hash_entry **hp, **hpend;
+ struct internal_reloc *rel, *relend;
+
+ /* Mark all the symbols in this section. */
+
+ hp = (obj_xcoff_sym_hashes (sec->owner)
+ + xcoff_section_data (sec->owner, sec)->first_symndx);
+ hpend = (obj_xcoff_sym_hashes (sec->owner)
+ + xcoff_section_data (sec->owner, sec)->last_symndx);
+ for (; hp < hpend; hp++)
+ {
+ register struct xcoff_link_hash_entry *h;
+
+ h = *hp;
+ if (h != NULL
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+ }
+ }
+
+ /* Look through the section relocs. */
+
+ if ((sec->flags & SEC_RELOC) != 0
+ && sec->reloc_count > 0)
+ {
+ rel = xcoff_read_internal_relocs (sec->owner, sec, true,
+ (bfd_byte *) NULL, false,
+ (struct internal_reloc *) NULL);
+ if (rel == NULL)
+ return false;
+ relend = rel + sec->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ asection *rsec;
+ struct xcoff_link_hash_entry *h;
+
+ if ((unsigned int) rel->r_symndx
+ > obj_raw_syment_count (sec->owner))
+ continue;
+
+ h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
+ if (h != NULL
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+ }
+
+ rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
+ if (rsec != NULL
+ && (rsec->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, rsec))
+ return false;
+ }
+
+ /* See if this reloc needs to be copied into the .loader
+ section. */
+ switch (rel->r_type)
+ {
+ default:
+ if (h == NULL
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common
+ || ((h->flags & XCOFF_CALLED) != 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && h->root.root.string[0] == '.'
+ && h->descriptor != NULL
+ && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
+ || ((h->descriptor->flags & XCOFF_IMPORT) != 0
+ && (h->descriptor->flags
+ & XCOFF_DEF_REGULAR) == 0))))
+ break;
+ /* Fall through. */
+ case R_POS:
+ case R_NEG:
+ case R_RL:
+ case R_RLA:
+ ++xcoff_hash_table (info)->ldrel_count;
+ if (h != NULL)
+ h->flags |= XCOFF_LDREL;
+ break;
+ case R_TOC:
+ case R_GL:
+ case R_TCL:
+ case R_TRL:
+ case R_TRLA:
+ /* We should never need a .loader reloc for a TOC
+ relative reloc. */
+ break;
+ }
+ }
+
+ if (! info->keep_memory
+ && coff_section_data (sec->owner, sec) != NULL
+ && coff_section_data (sec->owner, sec)->relocs != NULL
+ && ! coff_section_data (sec->owner, sec)->keep_relocs)
+ {
+ free (coff_section_data (sec->owner, sec)->relocs);
+ coff_section_data (sec->owner, sec)->relocs = NULL;
+ }
+ }
+ }
+
+ return true;
+}
+
+/* The sweep phase of garbage collection. Remove all garbage
+ sections. */
+
+static void
+xcoff_sweep (info)
+ struct bfd_link_info *info;
+{
+ bfd *sub;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *o;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_MARK) == 0)
+ {
+ /* Keep all sections from non-XCOFF input files. Keep
+ special sections. Keep .debug sections for the
+ moment. */
+ if (sub->xvec != info->hash->creator
+ || o == xcoff_hash_table (info)->debug_section
+ || o == xcoff_hash_table (info)->loader_section
+ || o == xcoff_hash_table (info)->linkage_section
+ || o == xcoff_hash_table (info)->toc_section
+ || o == xcoff_hash_table (info)->descriptor_section
+ || strcmp (o->name, ".debug") == 0)
+ o->flags |= SEC_MARK;
+ else
+ {
+ o->_raw_size = 0;
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ }
+ }
+ }
+ }
+}
+
+/* Record the number of elements in a set. This is used to output the
+ correct csect length. */
+
+boolean
+bfd_xcoff_link_record_set (output_bfd, info, harg, size)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ bfd_size_type size;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+ struct xcoff_link_size_list *n;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ /* This will hardly ever be called. I don't want to burn four bytes
+ per global symbol, so instead the size is kept on a linked list
+ attached to the hash table. */
+
+ n = ((struct xcoff_link_size_list *)
+ bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
+ if (n == NULL)
+ return false;
+ n->next = xcoff_hash_table (info)->size_list;
+ n->h = h;
+ n->size = size;
+ xcoff_hash_table (info)->size_list = n;
+
+ h->flags |= XCOFF_HAS_SIZE;
+
+ return true;
+}
+
+/* Import a symbol. */
+
+boolean
+bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
+ impmember)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ bfd_vma val;
+ const char *imppath;
+ const char *impfile;
+ const char *impmember;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ /* A symbol name which starts with a period is the code for a
+ function. If the symbol is undefined, then add an undefined
+ symbol for the function descriptor, and import that instead. */
+ if (h->root.root.string[0] == '.'
+ && h->root.type == bfd_link_hash_undefined
+ && val == (bfd_vma) -1)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = h->descriptor;
+ if (hds == NULL)
+ {
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ h->root.root.string + 1,
+ true, false, true);
+ if (hds == NULL)
+ return false;
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ hds->root.type = bfd_link_hash_undefined;
+ hds->root.u.undef.abfd = h->root.u.undef.abfd;
+ }
+ hds->flags |= XCOFF_DESCRIPTOR;
+ BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
+ && (h->flags & XCOFF_DESCRIPTOR) == 0);
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+
+ /* Now, if the descriptor is undefined, import the descriptor
+ rather than the symbol we were told to import. FIXME: Is
+ this correct in all cases? */
+ if (hds->root.type == bfd_link_hash_undefined)
+ h = hds;
+ }
+
+ h->flags |= XCOFF_IMPORT;
+
+ if (val != (bfd_vma) -1)
+ {
+ if (h->root.type == bfd_link_hash_defined
+ && (! bfd_is_abs_section (h->root.u.def.section)
+ || h->root.u.def.value != val))
+ {
+ if (! ((*info->callbacks->multiple_definition)
+ (info, h->root.root.string, h->root.u.def.section->owner,
+ h->root.u.def.section, h->root.u.def.value,
+ output_bfd, bfd_abs_section_ptr, val)))
+ return false;
+ }
+
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = val;
+ }
+
+ /* We overload the ldindx field to hold the l_ifile value for this
+ symbol. */
+ BFD_ASSERT (h->ldsym == NULL);
+ BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0);
+ if (imppath == NULL)
+ h->ldindx = -1;
+ else
+ {
+ unsigned int c;
+ struct xcoff_import_file **pp;
+
+ /* We start c at 1 because the first entry in the import list is
+ reserved for the library search path. */
+ for (pp = &xcoff_hash_table (info)->imports, c = 1;
+ *pp != NULL;
+ pp = &(*pp)->next, ++c)
+ {
+ if (strcmp ((*pp)->path, imppath) == 0
+ && strcmp ((*pp)->file, impfile) == 0
+ && strcmp ((*pp)->member, impmember) == 0)
+ break;
+ }
+
+ if (*pp == NULL)
+ {
+ struct xcoff_import_file *n;
+
+ n = ((struct xcoff_import_file *)
+ bfd_alloc (output_bfd, sizeof (struct xcoff_import_file)));
+ if (n == NULL)
+ return false;
+ n->next = NULL;
+ n->path = imppath;
+ n->file = impfile;
+ n->member = impmember;
+ *pp = n;
+ }
+
+ h->ldindx = c;
+ }
+
+ return true;
+}
+
+/* Export a symbol. */
+
+boolean
+bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ boolean syscall;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h->flags |= XCOFF_EXPORT;
+
+ /* FIXME: I'm not at all sure what syscall is supposed to mean, so
+ I'm just going to ignore it until somebody explains it. */
+
+ /* See if this is a function descriptor. It may be one even though
+ it is not so marked. */
+ if ((h->flags & XCOFF_DESCRIPTOR) == 0
+ && h->root.root.string[0] != '.')
+ {
+ char *fnname;
+ struct xcoff_link_hash_entry *hfn;
+
+ fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2);
+ if (fnname == NULL)
+ return false;
+ fnname[0] = '.';
+ strcpy (fnname + 1, h->root.root.string);
+ hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ fnname, false, false, true);
+ free (fnname);
+ if (hfn != NULL
+ && hfn->smclas == XMC_PR
+ && (hfn->root.type == bfd_link_hash_defined
+ || hfn->root.type == bfd_link_hash_defweak))
+ {
+ h->flags |= XCOFF_DESCRIPTOR;
+ h->descriptor = hfn;
+ hfn->descriptor = h;
+ }
+ }
+
+ /* Make sure we don't garbage collect this symbol. */
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+
+ /* If this is a function descriptor, make sure we don't garbage
+ collect the associated function code. We normally don't have to
+ worry about this, because the descriptor will be attached to a
+ section with relocs, but if we are creating the descriptor
+ ourselves those relocs will not be visible to the mark code. */
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0)
+ {
+ if (! xcoff_mark_symbol (info, h->descriptor))
+ return false;
+ }
+
+ return true;
+}
+
+/* Count a reloc against a symbol. This is called for relocs
+ generated by the linker script, typically for global constructors
+ and destructors. */
+
+boolean
+bfd_xcoff_link_count_reloc (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct xcoff_link_hash_entry *h;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false,
+ false));
+ if (h == NULL)
+ {
+ (*_bfd_error_handler) (_("%s: no such symbol"), name);
+ bfd_set_error (bfd_error_no_symbols);
+ return false;
+ }
+
+ h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
+ ++xcoff_hash_table (info)->ldrel_count;
+
+ /* Mark the symbol to avoid garbage collection. */
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+
+ return true;
+}
+
+/* This function is called for each symbol to which the linker script
+ assigns a value. */
+
+boolean
+bfd_xcoff_record_link_assignment (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct xcoff_link_hash_entry *h;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
+ false);
+ if (h == NULL)
+ return false;
+
+ h->flags |= XCOFF_DEF_REGULAR;
+
+ return true;
+}
+
+/* This structure is used to pass information through
+ xcoff_link_hash_traverse. */
+
+struct xcoff_loader_info
+{
+ /* Set if a problem occurred. */
+ boolean failed;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Link information structure. */
+ struct bfd_link_info *info;
+ /* Whether all defined symbols should be exported. */
+ boolean export_defineds;
+ /* Number of ldsym structures. */
+ size_t ldsym_count;
+ /* Size of string table. */
+ size_t string_size;
+ /* String table. */
+ bfd_byte *strings;
+ /* Allocated size of string table. */
+ size_t string_alc;
+};
+
+/* Build the .loader section. This is called by the XCOFF linker
+ emulation before_allocation routine. We must set the size of the
+ .loader section before the linker lays out the output file.
+ LIBPATH is the library path to search for shared objects; this is
+ normally built from the -L arguments passed to the linker. ENTRY
+ is the name of the entry point symbol (the -e linker option).
+ FILE_ALIGN is the alignment to use for sections within the file
+ (the -H linker option). MAXSTACK is the maximum stack size (the
+ -bmaxstack linker option). MAXDATA is the maximum data size (the
+ -bmaxdata linker option). GC is whether to do garbage collection
+ (the -bgc linker option). MODTYPE is the module type (the
+ -bmodtype linker option). TEXTRO is whether the text section must
+ be read only (the -btextro linker option). EXPORT_DEFINEDS is
+ whether all defined symbols should be exported (the -unix linker
+ option). SPECIAL_SECTIONS is set by this routine to csects with
+ magic names like _end. */
+
+boolean
+bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
+ file_align, maxstack, maxdata, gc,
+ modtype, textro, export_defineds,
+ special_sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *libpath;
+ const char *entry;
+ unsigned long file_align;
+ unsigned long maxstack;
+ unsigned long maxdata;
+ boolean gc;
+ int modtype;
+ boolean textro;
+ boolean export_defineds;
+ asection **special_sections;
+{
+ struct xcoff_link_hash_entry *hentry;
+ asection *lsec;
+ struct xcoff_loader_info ldinfo;
+ int i;
+ size_t impsize, impcount;
+ struct xcoff_import_file *fl;
+ struct internal_ldhdr *ldhdr;
+ bfd_size_type stoff;
+ register char *out;
+ asection *sec;
+ bfd *sub;
+ struct bfd_strtab_hash *debug_strtab;
+ bfd_byte *debug_contents = NULL;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ {
+ for (i = 0; i < 6; i++)
+ special_sections[i] = NULL;
+ return true;
+ }
+
+ ldinfo.failed = false;
+ ldinfo.output_bfd = output_bfd;
+ ldinfo.info = info;
+ ldinfo.export_defineds = export_defineds;
+ ldinfo.ldsym_count = 0;
+ ldinfo.string_size = 0;
+ ldinfo.strings = NULL;
+ ldinfo.string_alc = 0;
+
+ xcoff_data (output_bfd)->maxstack = maxstack;
+ xcoff_data (output_bfd)->maxdata = maxdata;
+ xcoff_data (output_bfd)->modtype = modtype;
+
+ xcoff_hash_table (info)->file_align = file_align;
+ xcoff_hash_table (info)->textro = textro;
+
+ hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
+ false, false, true);
+ if (hentry != NULL)
+ hentry->flags |= XCOFF_ENTRY;
+
+ /* Garbage collect unused sections. */
+ if (info->relocateable
+ || ! gc
+ || hentry == NULL
+ || (hentry->root.type != bfd_link_hash_defined
+ && hentry->root.type != bfd_link_hash_defweak))
+ {
+ gc = false;
+ xcoff_hash_table (info)->gc = false;
+
+ /* We still need to call xcoff_mark, in order to set ldrel_count
+ correctly. */
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *o;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, o))
+ goto error_return;
+ }
+ }
+ }
+ }
+ else
+ {
+ if (! xcoff_mark (info, hentry->root.u.def.section))
+ goto error_return;
+ xcoff_sweep (info);
+ xcoff_hash_table (info)->gc = true;
+ }
+
+ /* Return special sections to the caller. */
+ for (i = 0; i < 6; i++)
+ {
+ asection *sec;
+
+ sec = xcoff_hash_table (info)->special_sections[i];
+ if (sec != NULL
+ && gc
+ && (sec->flags & SEC_MARK) == 0)
+ sec = NULL;
+ special_sections[i] = sec;
+ }
+
+ if (info->input_bfds == NULL)
+ {
+ /* I'm not sure what to do in this bizarre case. */
+ return true;
+ }
+
+ xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
+ (PTR) &ldinfo);
+ if (ldinfo.failed)
+ goto error_return;
+
+ /* Work out the size of the import file names. Each import file ID
+ consists of three null terminated strings: the path, the file
+ name, and the archive member name. The first entry in the list
+ of names is the path to use to find objects, which the linker has
+ passed in as the libpath argument. For some reason, the path
+ entry in the other import file names appears to always be empty. */
+ impsize = strlen (libpath) + 3;
+ impcount = 1;
+ for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
+ {
+ ++impcount;
+ impsize += (strlen (fl->path)
+ + strlen (fl->file)
+ + strlen (fl->member)
+ + 3);
+ }
+
+ /* Set up the .loader section header. */
+ ldhdr = &xcoff_hash_table (info)->ldhdr;
+ ldhdr->l_version = 1;
+ ldhdr->l_nsyms = ldinfo.ldsym_count;
+ ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
+ ldhdr->l_istlen = impsize;
+ ldhdr->l_nimpid = impcount;
+ ldhdr->l_impoff = (LDHDRSZ
+ + ldhdr->l_nsyms * LDSYMSZ
+ + ldhdr->l_nreloc * LDRELSZ);
+ ldhdr->l_stlen = ldinfo.string_size;
+ stoff = ldhdr->l_impoff + impsize;
+ if (ldinfo.string_size == 0)
+ ldhdr->l_stoff = 0;
+ else
+ ldhdr->l_stoff = stoff;
+
+ /* We now know the final size of the .loader section. Allocate
+ space for it. */
+ lsec = xcoff_hash_table (info)->loader_section;
+ lsec->_raw_size = stoff + ldhdr->l_stlen;
+ lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
+ if (lsec->contents == NULL)
+ goto error_return;
+
+ /* Set up the header. */
+ xcoff_swap_ldhdr_out (output_bfd, ldhdr,
+ (struct external_ldhdr *) lsec->contents);
+
+ /* Set up the import file names. */
+ out = (char *) lsec->contents + ldhdr->l_impoff;
+ strcpy (out, libpath);
+ out += strlen (libpath) + 1;
+ *out++ = '\0';
+ *out++ = '\0';
+ for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
+ {
+ register const char *s;
+
+ s = fl->path;
+ while ((*out++ = *s++) != '\0')
+ ;
+ s = fl->file;
+ while ((*out++ = *s++) != '\0')
+ ;
+ s = fl->member;
+ while ((*out++ = *s++) != '\0')
+ ;
+ }
+
+ BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
+
+ /* Set up the symbol string table. */
+ if (ldinfo.string_size > 0)
+ {
+ memcpy (out, ldinfo.strings, ldinfo.string_size);
+ free (ldinfo.strings);
+ ldinfo.strings = NULL;
+ }
+
+ /* We can't set up the symbol table or the relocs yet, because we
+ don't yet know the final position of the various sections. The
+ .loader symbols are written out when the corresponding normal
+ symbols are written out in xcoff_link_input_bfd or
+ xcoff_write_global_symbol. The .loader relocs are written out
+ when the corresponding normal relocs are handled in
+ xcoff_link_input_bfd. */
+
+ /* Allocate space for the magic sections. */
+ sec = xcoff_hash_table (info)->linkage_section;
+ if (sec->_raw_size > 0)
+ {
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+ sec = xcoff_hash_table (info)->toc_section;
+ if (sec->_raw_size > 0)
+ {
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+ sec = xcoff_hash_table (info)->descriptor_section;
+ if (sec->_raw_size > 0)
+ {
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+
+ /* Now that we've done garbage collection, figure out the contents
+ of the .debug section. */
+ debug_strtab = xcoff_hash_table (info)->debug_strtab;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *subdeb;
+ bfd_size_type symcount;
+ unsigned long *debug_index;
+ asection **csectpp;
+ bfd_byte *esym, *esymend;
+ bfd_size_type symesz;
+
+ if (sub->xvec != info->hash->creator)
+ continue;
+ subdeb = bfd_get_section_by_name (sub, ".debug");
+ if (subdeb == NULL || subdeb->_raw_size == 0)
+ continue;
+
+ if (info->strip == strip_all
+ || info->strip == strip_debugger
+ || info->discard == discard_all)
+ {
+ subdeb->_raw_size = 0;
+ continue;
+ }
+
+ if (! _bfd_coff_get_external_symbols (sub))
+ goto error_return;
+
+ symcount = obj_raw_syment_count (sub);
+ debug_index = ((unsigned long *)
+ bfd_zalloc (sub, symcount * sizeof (unsigned long)));
+ if (debug_index == NULL)
+ goto error_return;
+ xcoff_data (sub)->debug_indices = debug_index;
+
+ /* Grab the contents of the .debug section. We use malloc and
+ copy the names into the debug stringtab, rather than
+ bfd_alloc, because I expect that, when linking many files
+ together, many of the strings will be the same. Storing the
+ strings in the hash table should save space in this case. */
+ debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size);
+ if (debug_contents == NULL)
+ goto error_return;
+ if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
+ (file_ptr) 0, subdeb->_raw_size))
+ goto error_return;
+
+ csectpp = xcoff_data (sub)->csects;
+
+ symesz = bfd_coff_symesz (sub);
+ esym = (bfd_byte *) obj_coff_external_syms (sub);
+ esymend = esym + symcount * symesz;
+ while (esym < esymend)
+ {
+ struct internal_syment sym;
+
+ bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
+
+ *debug_index = (unsigned long) -1;
+
+ if (sym._n._n_n._n_zeroes == 0
+ && *csectpp != NULL
+ && (! gc
+ || ((*csectpp)->flags & SEC_MARK) != 0
+ || *csectpp == bfd_abs_section_ptr)
+ && bfd_coff_symname_in_debug (sub, &sym))
+ {
+ char *name;
+ bfd_size_type indx;
+
+ name = (char *) debug_contents + sym._n._n_n._n_offset;
+ indx = _bfd_stringtab_add (debug_strtab, name, true, true);
+ if (indx == (bfd_size_type) -1)
+ goto error_return;
+ *debug_index = indx;
+ }
+
+ esym += (sym.n_numaux + 1) * symesz;
+ csectpp += sym.n_numaux + 1;
+ debug_index += sym.n_numaux + 1;
+ }
+
+ free (debug_contents);
+ debug_contents = NULL;
+
+ /* Clear the size of subdeb, so that it is not included directly
+ in the output file. */
+ subdeb->_raw_size = 0;
+
+ if (! info->keep_memory)
+ {
+ if (! _bfd_coff_free_symbols (sub))
+ goto error_return;
+ }
+ }
+
+ if (info->strip != strip_all)
+ xcoff_hash_table (info)->debug_section->_raw_size =
+ _bfd_stringtab_size (debug_strtab);
+
+ return true;
+
+ error_return:
+ if (ldinfo.strings != NULL)
+ free (ldinfo.strings);
+ if (debug_contents != NULL)
+ free (debug_contents);
+ return false;
+}
+
+/* Add a symbol to the .loader symbols, if necessary. */
+
+static boolean
+xcoff_build_ldsyms (h, p)
+ struct xcoff_link_hash_entry *h;
+ PTR p;
+{
+ struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
+ size_t len;
+
+ /* If this is a final link, and the symbol was defined as a common
+ symbol in a regular object file, and there was no definition in
+ any dynamic object, then the linker will have allocated space for
+ the symbol in a common section but the XCOFF_DEF_REGULAR flag
+ will not have been set. */
+ if (h->root.type == bfd_link_hash_defined
+ && (h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_REF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (bfd_is_abs_section (h->root.u.def.section)
+ || (h->root.u.def.section->owner->flags & DYNAMIC) == 0))
+ h->flags |= XCOFF_DEF_REGULAR;
+
+ /* If all defined symbols should be exported, mark them now. We
+ don't want to export the actual functions, just the function
+ descriptors. */
+ if (ldinfo->export_defineds
+ && (h->flags & XCOFF_DEF_REGULAR) != 0
+ && h->root.root.string[0] != '.')
+ {
+ boolean export;
+
+ /* We don't export a symbol which is being defined by an object
+ included from an archive which contains a shared object. The
+ rationale is that if an archive contains both an unshared and
+ a shared object, then there must be some reason that the
+ unshared object is unshared, and we don't want to start
+ providing a shared version of it. In particular, this solves
+ a bug involving the _savefNN set of functions. gcc will call
+ those functions without providing a slot to restore the TOC,
+ so it is essential that these functions be linked in directly
+ and not from a shared object, which means that a shared
+ object which also happens to link them in must not export
+ them. This is confusing, but I haven't been able to think of
+ a different approach. Note that the symbols can, of course,
+ be exported explicitly. */
+ export = true;
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->root.u.def.section->owner != NULL
+ && h->root.u.def.section->owner->my_archive != NULL)
+ {
+ bfd *arbfd, *member;
+
+ arbfd = h->root.u.def.section->owner->my_archive;
+ member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL);
+ while (member != NULL)
+ {
+ if ((member->flags & DYNAMIC) != 0)
+ {
+ export = false;
+ break;
+ }
+ member = bfd_openr_next_archived_file (arbfd, member);
+ }
+ }
+
+ if (export)
+ h->flags |= XCOFF_EXPORT;
+ }
+
+ /* We don't want to garbage collect symbols which are not defined in
+ XCOFF files. This is a convenient place to mark them. */
+ if (xcoff_hash_table (ldinfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && (h->root.u.def.section->owner == NULL
+ || (h->root.u.def.section->owner->xvec
+ != ldinfo->info->hash->creator)))
+ h->flags |= XCOFF_MARK;
+
+ /* If this symbol is called and defined in a dynamic object, or it
+ is imported, then we need to set up global linkage code for it.
+ (Unless we did garbage collection and we didn't need this
+ symbol.) */
+ if ((h->flags & XCOFF_CALLED) != 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && h->root.root.string[0] == '.'
+ && h->descriptor != NULL
+ && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
+ || ((h->descriptor->flags & XCOFF_IMPORT) != 0
+ && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
+ && (! xcoff_hash_table (ldinfo->info)->gc
+ || (h->flags & XCOFF_MARK) != 0))
+ {
+ asection *sec;
+ struct xcoff_link_hash_entry *hds;
+
+ sec = xcoff_hash_table (ldinfo->info)->linkage_section;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = sec;
+ h->root.u.def.value = sec->_raw_size;
+ h->smclas = XMC_GL;
+ h->flags |= XCOFF_DEF_REGULAR;
+ sec->_raw_size += XCOFF_GLINK_SIZE;
+
+ /* The global linkage code requires a TOC entry for the
+ descriptor. */
+ hds = h->descriptor;
+ BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
+ || hds->root.type == bfd_link_hash_undefweak)
+ && (hds->flags & XCOFF_DEF_REGULAR) == 0);
+ hds->flags |= XCOFF_MARK;
+ if (hds->toc_section == NULL)
+ {
+ hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
+ hds->u.toc_offset = hds->toc_section->_raw_size;
+ hds->toc_section->_raw_size += 4;
+ ++xcoff_hash_table (ldinfo->info)->ldrel_count;
+ ++hds->toc_section->reloc_count;
+ hds->indx = -2;
+ hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
+
+ /* We need to call xcoff_build_ldsyms recursively here,
+ because we may already have passed hds on the traversal. */
+ xcoff_build_ldsyms (hds, p);
+ }
+ }
+
+ /* If this symbol is exported, but not defined, we need to try to
+ define it. */
+ if ((h->flags & XCOFF_EXPORT) != 0
+ && (h->flags & XCOFF_IMPORT) == 0
+ && (h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0
+ && (h->descriptor->root.type == bfd_link_hash_defined
+ || h->descriptor->root.type == bfd_link_hash_defweak))
+ {
+ asection *sec;
+
+ /* This is an undefined function descriptor associated with
+ a defined entry point. We can build up a function
+ descriptor ourselves. Believe it or not, the AIX linker
+ actually does this, and there are cases where we need to
+ do it as well. */
+ sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = sec;
+ h->root.u.def.value = sec->_raw_size;
+ h->smclas = XMC_DS;
+ h->flags |= XCOFF_DEF_REGULAR;
+ sec->_raw_size += 12;
+
+ /* A function descriptor uses two relocs: one for the
+ associated code, and one for the TOC address. */
+ xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
+ sec->reloc_count += 2;
+
+ /* We handle writing out the contents of the descriptor in
+ xcoff_write_global_symbol. */
+ }
+ else
+ {
+ (*_bfd_error_handler)
+ (_("warning: attempt to export undefined symbol `%s'"),
+ h->root.root.string);
+ h->ldsym = NULL;
+ return true;
+ }
+ }
+
+ /* If this is still a common symbol, and it wasn't garbage
+ collected, we need to actually allocate space for it in the .bss
+ section. */
+ if (h->root.type == bfd_link_hash_common
+ && (! xcoff_hash_table (ldinfo->info)->gc
+ || (h->flags & XCOFF_MARK) != 0)
+ && h->root.u.c.p->section->_raw_size == 0)
+ {
+ BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
+ h->root.u.c.p->section->_raw_size = h->root.u.c.size;
+ }
+
+ /* We need to add a symbol to the .loader section if it is mentioned
+ in a reloc which we are copying to the .loader section and it was
+ not defined or common, or if it is the entry point, or if it is
+ being exported. */
+
+ if (((h->flags & XCOFF_LDREL) == 0
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common)
+ && (h->flags & XCOFF_ENTRY) == 0
+ && (h->flags & XCOFF_EXPORT) == 0)
+ {
+ h->ldsym = NULL;
+ return true;
+ }
+
+ /* We don't need to add this symbol if we did garbage collection and
+ we did not mark this symbol. */
+ if (xcoff_hash_table (ldinfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ h->ldsym = NULL;
+ return true;
+ }
+
+ /* We may have already processed this symbol due to the recursive
+ call above. */
+ if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
+ return true;
+
+ /* We need to add this symbol to the .loader symbols. */
+
+ BFD_ASSERT (h->ldsym == NULL);
+ h->ldsym = ((struct internal_ldsym *)
+ bfd_zalloc (ldinfo->output_bfd,
+ sizeof (struct internal_ldsym)));
+ if (h->ldsym == NULL)
+ {
+ ldinfo->failed = true;
+ return false;
+ }
+
+ if ((h->flags & XCOFF_IMPORT) != 0)
+ h->ldsym->l_ifile = h->ldindx;
+
+ /* The first 3 symbol table indices are reserved to indicate the
+ sections. */
+ h->ldindx = ldinfo->ldsym_count + 3;
+
+ ++ldinfo->ldsym_count;
+
+ len = strlen (h->root.root.string);
+ if (len <= SYMNMLEN)
+ strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN);
+ else
+ {
+ if (ldinfo->string_size + len + 3 > ldinfo->string_alc)
+ {
+ size_t newalc;
+ bfd_byte *newstrings;
+
+ newalc = ldinfo->string_alc * 2;
+ if (newalc == 0)
+ newalc = 32;
+ while (ldinfo->string_size + len + 3 > newalc)
+ newalc *= 2;
+
+ newstrings = ((bfd_byte *)
+ bfd_realloc ((PTR) ldinfo->strings, newalc));
+ if (newstrings == NULL)
+ {
+ ldinfo->failed = true;
+ return false;
+ }
+ ldinfo->string_alc = newalc;
+ ldinfo->strings = newstrings;
+ }
+
+ bfd_put_16 (ldinfo->output_bfd, len + 1,
+ ldinfo->strings + ldinfo->string_size);
+ strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string);
+ h->ldsym->_l._l_l._l_zeroes = 0;
+ h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2;
+ ldinfo->string_size += len + 3;
+ }
+
+ h->flags |= XCOFF_BUILT_LDSYM;
+
+ return true;
+}
+
+/* Do the final link step. */
+
+boolean
+_bfd_xcoff_bfd_final_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd_size_type symesz;
+ struct xcoff_final_link_info finfo;
+ asection *o;
+ struct bfd_link_order *p;
+ size_t max_contents_size;
+ size_t max_sym_count;
+ size_t max_lineno_count;
+ size_t max_reloc_count;
+ size_t max_output_reloc_count;
+ file_ptr rel_filepos;
+ unsigned int relsz;
+ file_ptr line_filepos;
+ unsigned int linesz;
+ bfd *sub;
+ bfd_byte *external_relocs = NULL;
+ char strbuf[STRING_SIZE_SIZE];
+
+ if (info->shared)
+ abfd->flags |= DYNAMIC;
+
+ symesz = bfd_coff_symesz (abfd);
+
+ finfo.info = info;
+ finfo.output_bfd = abfd;
+ finfo.strtab = NULL;
+ finfo.section_info = NULL;
+ finfo.last_file_index = -1;
+ finfo.toc_symindx = -1;
+ finfo.internal_syms = NULL;
+ finfo.sym_indices = NULL;
+ finfo.outsyms = NULL;
+ finfo.linenos = NULL;
+ finfo.contents = NULL;
+ finfo.external_relocs = NULL;
+
+ finfo.ldsym = ((struct external_ldsym *)
+ (xcoff_hash_table (info)->loader_section->contents
+ + LDHDRSZ));
+ finfo.ldrel = ((struct external_ldrel *)
+ (xcoff_hash_table (info)->loader_section->contents
+ + LDHDRSZ
+ + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ));
+
+ xcoff_data (abfd)->coff.link_info = info;
+
+ finfo.strtab = _bfd_stringtab_init ();
+ if (finfo.strtab == NULL)
+ goto error_return;
+
+ /* Count the line number and relocation entries required for the
+ output file. Determine a few maximum sizes. */
+ max_contents_size = 0;
+ max_lineno_count = 0;
+ max_reloc_count = 0;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order)
+ {
+ asection *sec;
+
+ sec = p->u.indirect.section;
+
+ /* Mark all sections which are to be included in the
+ link. This will normally be every section. We need
+ to do this so that we can identify any sections which
+ the linker has decided to not include. */
+ sec->linker_mark = true;
+
+ if (info->strip == strip_none
+ || info->strip == strip_some)
+ o->lineno_count += sec->lineno_count;
+
+ o->reloc_count += sec->reloc_count;
+
+ if (sec->_raw_size > max_contents_size)
+ max_contents_size = sec->_raw_size;
+ if (sec->lineno_count > max_lineno_count)
+ max_lineno_count = sec->lineno_count;
+ if (coff_section_data (sec->owner, sec) != NULL
+ && xcoff_section_data (sec->owner, sec) != NULL
+ && (xcoff_section_data (sec->owner, sec)->lineno_count
+ > max_lineno_count))
+ max_lineno_count =
+ xcoff_section_data (sec->owner, sec)->lineno_count;
+ if (sec->reloc_count > max_reloc_count)
+ max_reloc_count = sec->reloc_count;
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ ++o->reloc_count;
+ }
+ }
+
+ /* Compute the file positions for all the sections. */
+ if (abfd->output_has_begun)
+ {
+ if (xcoff_hash_table (info)->file_align != 0)
+ abort ();
+ }
+ else
+ {
+ bfd_vma file_align;
+
+ file_align = xcoff_hash_table (info)->file_align;
+ if (file_align != 0)
+ {
+ boolean saw_contents;
+ int indx;
+ asection **op;
+ file_ptr sofar;
+
+ /* Insert .pad sections before every section which has
+ contents and is loaded, if it is preceded by some other
+ section which has contents and is loaded. */
+ saw_contents = true;
+ for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
+ {
+ if (strcmp ((*op)->name, ".pad") == 0)
+ saw_contents = false;
+ else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
+ && ((*op)->flags & SEC_LOAD) != 0)
+ {
+ if (! saw_contents)
+ saw_contents = true;
+ else
+ {
+ asection *n, *hold;
+
+ hold = *op;
+ *op = NULL;
+ n = bfd_make_section_anyway (abfd, ".pad");
+ BFD_ASSERT (*op == n);
+ n->next = hold;
+ n->flags = SEC_HAS_CONTENTS;
+ n->alignment_power = 0;
+ saw_contents = false;
+ }
+ }
+ }
+
+ /* Reset the section indices after inserting the new
+ sections. */
+ indx = 0;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ ++indx;
+ o->target_index = indx;
+ }
+ BFD_ASSERT ((unsigned int) indx == abfd->section_count);
+
+ /* Work out appropriate sizes for the .pad sections to force
+ each section to land on a page boundary. This bit of
+ code knows what compute_section_file_positions is going
+ to do. */
+ sofar = bfd_coff_filhsz (abfd);
+ sofar += bfd_coff_aoutsz (abfd);
+ sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff)
+ sofar += bfd_coff_scnhsz (abfd);
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (strcmp (o->name, ".pad") == 0)
+ {
+ bfd_vma pageoff;
+
+ BFD_ASSERT (o->_raw_size == 0);
+ pageoff = sofar & (file_align - 1);
+ if (pageoff != 0)
+ {
+ o->_raw_size = file_align - pageoff;
+ sofar += file_align - pageoff;
+ o->flags |= SEC_HAS_CONTENTS;
+ }
+ }
+ else
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) != 0)
+ sofar += BFD_ALIGN (o->_raw_size,
+ 1 << o->alignment_power);
+ }
+ }
+ }
+
+ if (! bfd_coff_compute_section_file_positions (abfd))
+ goto error_return;
+ }
+
+ /* Allocate space for the pointers we need to keep for the relocs. */
+ {
+ unsigned int i;
+
+ /* We use section_count + 1, rather than section_count, because
+ the target_index fields are 1 based. */
+ finfo.section_info =
+ ((struct xcoff_link_section_info *)
+ bfd_malloc ((abfd->section_count + 1)
+ * sizeof (struct xcoff_link_section_info)));
+ if (finfo.section_info == NULL)
+ goto error_return;
+ for (i = 0; i <= abfd->section_count; i++)
+ {
+ finfo.section_info[i].relocs = NULL;
+ finfo.section_info[i].rel_hashes = NULL;
+ finfo.section_info[i].toc_rel_hashes = NULL;
+ }
+ }
+
+ /* Set the file positions for the relocs. */
+ rel_filepos = obj_relocbase (abfd);
+ relsz = bfd_coff_relsz (abfd);
+ max_output_reloc_count = 0;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (o->reloc_count == 0)
+ o->rel_filepos = 0;
+ else
+ {
+ /* A stripped file has no relocs. However, we still
+ allocate the buffers, so that later code doesn't have to
+ worry about whether we are stripping or not. */
+ if (info->strip == strip_all)
+ o->rel_filepos = 0;
+ else
+ {
+ o->flags |= SEC_RELOC;
+ o->rel_filepos = rel_filepos;
+ rel_filepos += o->reloc_count * relsz;
+ }
+
+ /* We don't know the indices of global symbols until we have
+ written out all the local symbols. For each section in
+ the output file, we keep an array of pointers to hash
+ table entries. Each entry in the array corresponds to a
+ reloc. When we find a reloc against a global symbol, we
+ set the corresponding entry in this array so that we can
+ fix up the symbol index after we have written out all the
+ local symbols.
+
+ Because of this problem, we also keep the relocs in
+ memory until the end of the link. This wastes memory.
+ We could backpatch the file later, I suppose, although it
+ would be slow. */
+ finfo.section_info[o->target_index].relocs =
+ ((struct internal_reloc *)
+ bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
+ finfo.section_info[o->target_index].rel_hashes =
+ ((struct xcoff_link_hash_entry **)
+ bfd_malloc (o->reloc_count
+ * sizeof (struct xcoff_link_hash_entry *)));
+ if (finfo.section_info[o->target_index].relocs == NULL
+ || finfo.section_info[o->target_index].rel_hashes == NULL)
+ goto error_return;
+
+ if (o->reloc_count > max_output_reloc_count)
+ max_output_reloc_count = o->reloc_count;
+ }
+ }
+
+ /* We now know the size of the relocs, so we can determine the file
+ positions of the line numbers. */
+ line_filepos = rel_filepos;
+ finfo.line_filepos = line_filepos;
+ linesz = bfd_coff_linesz (abfd);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (o->lineno_count == 0)
+ o->line_filepos = 0;
+ else
+ {
+ o->line_filepos = line_filepos;
+ line_filepos += o->lineno_count * linesz;
+ }
+
+ /* Reset the reloc and lineno counts, so that we can use them to
+ count the number of entries we have output so far. */
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ }
+
+ obj_sym_filepos (abfd) = line_filepos;
+
+ /* Figure out the largest number of symbols in an input BFD. Take
+ the opportunity to clear the output_has_begun fields of all the
+ input BFD's. We want at least 6 symbols, since that is the
+ number which xcoff_write_global_symbol may need. */
+ max_sym_count = 6;
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ size_t sz;
+
+ sub->output_has_begun = false;
+ sz = obj_raw_syment_count (sub);
+ if (sz > max_sym_count)
+ max_sym_count = sz;
+ }
+
+ /* Allocate some buffers used while linking. */
+ finfo.internal_syms = ((struct internal_syment *)
+ bfd_malloc (max_sym_count
+ * sizeof (struct internal_syment)));
+ finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
+ finfo.outsyms = ((bfd_byte *)
+ bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
+ finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
+ * bfd_coff_linesz (abfd));
+ finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
+ finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
+ if ((finfo.internal_syms == NULL && max_sym_count > 0)
+ || (finfo.sym_indices == NULL && max_sym_count > 0)
+ || finfo.outsyms == NULL
+ || (finfo.linenos == NULL && max_lineno_count > 0)
+ || (finfo.contents == NULL && max_contents_size > 0)
+ || (finfo.external_relocs == NULL && max_reloc_count > 0))
+ goto error_return;
+
+ obj_raw_syment_count (abfd) = 0;
+ xcoff_data (abfd)->toc = (bfd_vma) -1;
+
+ /* We now know the position of everything in the file, except that
+ we don't know the size of the symbol table and therefore we don't
+ know where the string table starts. We just build the string
+ table in memory as we go along. We process all the relocations
+ for a single input file at once. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && p->u.indirect.section->owner->xvec == abfd->xvec)
+ {
+ sub = p->u.indirect.section->owner;
+ if (! sub->output_has_begun)
+ {
+ if (! xcoff_link_input_bfd (&finfo, sub))
+ goto error_return;
+ sub->output_has_begun = true;
+ }
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ {
+ if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
+ goto error_return;
+ }
+ else
+ {
+ if (! _bfd_default_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ }
+ }
+
+ /* Free up the buffers used by xcoff_link_input_bfd. */
+
+ if (finfo.internal_syms != NULL)
+ {
+ free (finfo.internal_syms);
+ finfo.internal_syms = NULL;
+ }
+ if (finfo.sym_indices != NULL)
+ {
+ free (finfo.sym_indices);
+ finfo.sym_indices = NULL;
+ }
+ if (finfo.linenos != NULL)
+ {
+ free (finfo.linenos);
+ finfo.linenos = NULL;
+ }
+ if (finfo.contents != NULL)
+ {
+ free (finfo.contents);
+ finfo.contents = NULL;
+ }
+ if (finfo.external_relocs != NULL)
+ {
+ free (finfo.external_relocs);
+ finfo.external_relocs = NULL;
+ }
+
+ /* The value of the last C_FILE symbol is supposed to be -1. Write
+ it out again. */
+ if (finfo.last_file_index != -1)
+ {
+ finfo.last_file.n_value = -1;
+ bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
+ (PTR) finfo.outsyms);
+ if (bfd_seek (abfd,
+ (obj_sym_filepos (abfd)
+ + finfo.last_file_index * symesz),
+ SEEK_SET) != 0
+ || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
+ goto error_return;
+ }
+
+ /* Write out all the global symbols which do not come from XCOFF
+ input files. */
+ xcoff_link_hash_traverse (xcoff_hash_table (info),
+ xcoff_write_global_symbol,
+ (PTR) &finfo);
+
+ if (finfo.outsyms != NULL)
+ {
+ free (finfo.outsyms);
+ finfo.outsyms = NULL;
+ }
+
+ /* Now that we have written out all the global symbols, we know the
+ symbol indices to use for relocs against them, and we can finally
+ write out the relocs. */
+ external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz);
+ if (external_relocs == NULL && max_output_reloc_count != 0)
+ goto error_return;
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct internal_reloc *irel;
+ struct internal_reloc *irelend;
+ struct xcoff_link_hash_entry **rel_hash;
+ struct xcoff_toc_rel_hash *toc_rel_hash;
+ bfd_byte *erel;
+
+ /* A stripped file has no relocs. */
+ if (info->strip == strip_all)
+ {
+ o->reloc_count = 0;
+ continue;
+ }
+
+ if (o->reloc_count == 0)
+ continue;
+
+ irel = finfo.section_info[o->target_index].relocs;
+ irelend = irel + o->reloc_count;
+ rel_hash = finfo.section_info[o->target_index].rel_hashes;
+ for (; irel < irelend; irel++, rel_hash++, erel += relsz)
+ {
+ if (*rel_hash != NULL)
+ {
+ if ((*rel_hash)->indx < 0)
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, (*rel_hash)->root.root.string,
+ (bfd *) NULL, o, irel->r_vaddr)))
+ goto error_return;
+ (*rel_hash)->indx = 0;
+ }
+ irel->r_symndx = (*rel_hash)->indx;
+ }
+ }
+
+ for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
+ toc_rel_hash != NULL;
+ toc_rel_hash = toc_rel_hash->next)
+ {
+ if (toc_rel_hash->h->u.toc_indx < 0)
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, toc_rel_hash->h->root.root.string,
+ (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
+ goto error_return;
+ toc_rel_hash->h->u.toc_indx = 0;
+ }
+ toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
+ }
+
+ /* XCOFF requires that the relocs be sorted by address. We tend
+ to produce them in the order in which their containing csects
+ appear in the symbol table, which is not necessarily by
+ address. So we sort them here. There may be a better way to
+ do this. */
+ qsort ((PTR) finfo.section_info[o->target_index].relocs,
+ o->reloc_count, sizeof (struct internal_reloc),
+ xcoff_sort_relocs);
+
+ irel = finfo.section_info[o->target_index].relocs;
+ irelend = irel + o->reloc_count;
+ erel = external_relocs;
+ for (; irel < irelend; irel++, rel_hash++, erel += relsz)
+ bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
+
+ if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
+ || bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
+ abfd) != relsz * o->reloc_count)
+ goto error_return;
+ }
+
+ if (external_relocs != NULL)
+ {
+ free (external_relocs);
+ external_relocs = NULL;
+ }
+
+ /* Free up the section information. */
+ if (finfo.section_info != NULL)
+ {
+ unsigned int i;
+
+ for (i = 0; i < abfd->section_count; i++)
+ {
+ if (finfo.section_info[i].relocs != NULL)
+ free (finfo.section_info[i].relocs);
+ if (finfo.section_info[i].rel_hashes != NULL)
+ free (finfo.section_info[i].rel_hashes);
+ }
+ free (finfo.section_info);
+ finfo.section_info = NULL;
+ }
+
+ /* Write out the loader section contents. */
+ BFD_ASSERT ((bfd_byte *) finfo.ldrel
+ == (xcoff_hash_table (info)->loader_section->contents
+ + xcoff_hash_table (info)->ldhdr.l_impoff));
+ o = xcoff_hash_table (info)->loader_section;
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents, o->output_offset,
+ o->_raw_size))
+ goto error_return;
+
+ /* Write out the magic sections. */
+ o = xcoff_hash_table (info)->linkage_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+ o = xcoff_hash_table (info)->toc_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+ o = xcoff_hash_table (info)->descriptor_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+
+ /* Write out the string table. */
+ if (bfd_seek (abfd,
+ (obj_sym_filepos (abfd)
+ + obj_raw_syment_count (abfd) * symesz),
+ SEEK_SET) != 0)
+ goto error_return;
+ bfd_h_put_32 (abfd,
+ _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
+ (bfd_byte *) strbuf);
+ if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
+ goto error_return;
+ if (! _bfd_stringtab_emit (abfd, finfo.strtab))
+ goto error_return;
+
+ _bfd_stringtab_free (finfo.strtab);
+
+ /* Write out the debugging string table. */
+ o = xcoff_hash_table (info)->debug_section;
+ if (o != NULL)
+ {
+ struct bfd_strtab_hash *debug_strtab;
+
+ debug_strtab = xcoff_hash_table (info)->debug_strtab;
+ BFD_ASSERT (o->output_section->_raw_size - o->output_offset
+ >= _bfd_stringtab_size (debug_strtab));
+ if (bfd_seek (abfd,
+ o->output_section->filepos + o->output_offset,
+ SEEK_SET) != 0)
+ goto error_return;
+ if (! _bfd_stringtab_emit (abfd, debug_strtab))
+ goto error_return;
+ }
+
+ /* Setting bfd_get_symcount to 0 will cause write_object_contents to
+ not try to write out the symbols. */
+ bfd_get_symcount (abfd) = 0;
+
+ return true;
+
+ error_return:
+ if (finfo.strtab != NULL)
+ _bfd_stringtab_free (finfo.strtab);
+ if (finfo.section_info != NULL)
+ {
+ unsigned int i;
+
+ for (i = 0; i < abfd->section_count; i++)
+ {
+ if (finfo.section_info[i].relocs != NULL)
+ free (finfo.section_info[i].relocs);
+ if (finfo.section_info[i].rel_hashes != NULL)
+ free (finfo.section_info[i].rel_hashes);
+ }
+ free (finfo.section_info);
+ }
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.sym_indices != NULL)
+ free (finfo.sym_indices);
+ if (finfo.outsyms != NULL)
+ free (finfo.outsyms);
+ if (finfo.linenos != NULL)
+ free (finfo.linenos);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (external_relocs != NULL)
+ free (external_relocs);
+ return false;
+}
+
+/* Link an input file into the linker output file. This function
+ handles all the sections and relocations of the input file at once. */
+
+static boolean
+xcoff_link_input_bfd (finfo, input_bfd)
+ struct xcoff_final_link_info *finfo;
+ bfd *input_bfd;
+{
+ bfd *output_bfd;
+ const char *strings;
+ bfd_size_type syment_base;
+ unsigned int n_tmask;
+ unsigned int n_btshft;
+ boolean copy, hash;
+ bfd_size_type isymesz;
+ bfd_size_type osymesz;
+ bfd_size_type linesz;
+ bfd_byte *esym;
+ bfd_byte *esym_end;
+ struct xcoff_link_hash_entry **sym_hash;
+ struct internal_syment *isymp;
+ asection **csectpp;
+ unsigned long *debug_index;
+ long *indexp;
+ unsigned long output_index;
+ bfd_byte *outsym;
+ unsigned int incls;
+ asection *oline;
+ boolean keep_syms;
+ asection *o;
+
+ /* We can just skip DYNAMIC files, unless this is a static link. */
+ if ((input_bfd->flags & DYNAMIC) != 0
+ && ! finfo->info->static_link)
+ return true;
+
+ /* Move all the symbols to the output file. */
+
+ output_bfd = finfo->output_bfd;
+ strings = NULL;
+ syment_base = obj_raw_syment_count (output_bfd);
+ isymesz = bfd_coff_symesz (input_bfd);
+ osymesz = bfd_coff_symesz (output_bfd);
+ linesz = bfd_coff_linesz (input_bfd);
+ BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
+
+ n_tmask = coff_data (input_bfd)->local_n_tmask;
+ n_btshft = coff_data (input_bfd)->local_n_btshft;
+
+ /* Define macros so that ISFCN, et. al., macros work correctly. */
+#define N_TMASK n_tmask
+#define N_BTSHFT n_btshft
+
+ copy = false;
+ if (! finfo->info->keep_memory)
+ copy = true;
+ hash = true;
+ if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
+ hash = false;
+
+ if (! _bfd_coff_get_external_symbols (input_bfd))
+ return false;
+
+ esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
+ esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
+ sym_hash = obj_xcoff_sym_hashes (input_bfd);
+ csectpp = xcoff_data (input_bfd)->csects;
+ debug_index = xcoff_data (input_bfd)->debug_indices;
+ isymp = finfo->internal_syms;
+ indexp = finfo->sym_indices;
+ output_index = syment_base;
+ outsym = finfo->outsyms;
+ incls = 0;
+ oline = NULL;
+
+ while (esym < esym_end)
+ {
+ struct internal_syment isym;
+ union internal_auxent aux;
+ int smtyp = 0;
+ boolean skip;
+ boolean require;
+ int add;
+
+ bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
+
+ /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
+ information. */
+ if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
+ {
+ BFD_ASSERT (isymp->n_numaux > 0);
+ bfd_coff_swap_aux_in (input_bfd,
+ (PTR) (esym + isymesz * isymp->n_numaux),
+ isymp->n_type, isymp->n_sclass,
+ isymp->n_numaux - 1, isymp->n_numaux,
+ (PTR) &aux);
+ smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
+ }
+
+ /* Make a copy of *isymp so that the relocate_section function
+ always sees the original values. This is more reliable than
+ always recomputing the symbol value even if we are stripping
+ the symbol. */
+ isym = *isymp;
+
+ /* If this symbol is in the .loader section, swap out the
+ .loader symbol information. If this is an external symbol
+ reference to a defined symbol, though, then wait until we get
+ to the definition. */
+ if (isym.n_sclass == C_EXT
+ && *sym_hash != NULL
+ && (*sym_hash)->ldsym != NULL
+ && (smtyp != XTY_ER
+ || (*sym_hash)->root.type == bfd_link_hash_undefined))
+ {
+ struct xcoff_link_hash_entry *h;
+ struct internal_ldsym *ldsym;
+
+ h = *sym_hash;
+ ldsym = h->ldsym;
+ if (isym.n_scnum > 0)
+ {
+ ldsym->l_scnum = (*csectpp)->output_section->target_index;
+ ldsym->l_value = (isym.n_value
+ + (*csectpp)->output_section->vma
+ + (*csectpp)->output_offset
+ - (*csectpp)->vma);
+ }
+ else
+ {
+ ldsym->l_scnum = isym.n_scnum;
+ ldsym->l_value = isym.n_value;
+ }
+
+ ldsym->l_smtype = smtyp;
+ if (((h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_IMPORT) != 0)
+ ldsym->l_smtype |= L_IMPORT;
+ if (((h->flags & XCOFF_DEF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_EXPORT) != 0)
+ ldsym->l_smtype |= L_EXPORT;
+ if ((h->flags & XCOFF_ENTRY) != 0)
+ ldsym->l_smtype |= L_ENTRY;
+
+ ldsym->l_smclas = aux.x_csect.x_smclas;
+
+ if (ldsym->l_ifile == (bfd_size_type) -1)
+ ldsym->l_ifile = 0;
+ else if (ldsym->l_ifile == 0)
+ {
+ if ((ldsym->l_smtype & L_IMPORT) == 0)
+ ldsym->l_ifile = 0;
+ else
+ {
+ bfd *impbfd;
+
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ impbfd = h->root.u.def.section->owner;
+ else if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ impbfd = h->root.u.undef.abfd;
+ else
+ impbfd = NULL;
+
+ if (impbfd == NULL)
+ ldsym->l_ifile = 0;
+ else
+ {
+ BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
+ ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
+ }
+ }
+ }
+
+ ldsym->l_parm = 0;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
+ xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
+ finfo->ldsym + h->ldindx - 3);
+ h->ldsym = NULL;
+
+ /* Fill in snentry now that we know the target_index. */
+ if ((h->flags & XCOFF_ENTRY) != 0
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ xcoff_data (output_bfd)->snentry =
+ h->root.u.def.section->output_section->target_index;
+ }
+
+ *indexp = -1;
+
+ skip = false;
+ require = false;
+ add = 1 + isym.n_numaux;
+
+ /* If we are skipping this csect, we want to skip this symbol. */
+ if (*csectpp == NULL)
+ skip = true;
+
+ /* If we garbage collected this csect, we want to skip this
+ symbol. */
+ if (! skip
+ && xcoff_hash_table (finfo->info)->gc
+ && ((*csectpp)->flags & SEC_MARK) == 0
+ && *csectpp != bfd_abs_section_ptr)
+ skip = true;
+
+ /* An XCOFF linker always skips C_STAT symbols. */
+ if (! skip
+ && isymp->n_sclass == C_STAT)
+ skip = true;
+
+ /* We skip all but the first TOC anchor. */
+ if (! skip
+ && isymp->n_sclass == C_HIDEXT
+ && aux.x_csect.x_smclas == XMC_TC0)
+ {
+ if (finfo->toc_symindx != -1)
+ skip = true;
+ else
+ {
+ bfd_vma tocval, tocend;
+
+ tocval = ((*csectpp)->output_section->vma
+ + (*csectpp)->output_offset
+ + isym.n_value
+ - (*csectpp)->vma);
+ /* We want to find out if tocval is a good value to use
+ as the TOC anchor--that is, whether we can access all
+ of the TOC using a 16 bit offset from tocval. This
+ test assumes that the TOC comes at the end of the
+ output section, as it does in the default linker
+ script. FIXME: This doesn't handle .tocbss sections
+ created from XMC_TD common symbols correctly. */
+
+ tocend = ((*csectpp)->output_section->vma
+ + (*csectpp)->output_section->_raw_size);
+
+ if (tocval + 0x10000 < tocend)
+ {
+ (*_bfd_error_handler)
+ (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"),
+ (unsigned long) (tocend - tocval));
+ bfd_set_error (bfd_error_file_too_big);
+ return false;
+ }
+
+ if (tocval + 0x8000 < tocend)
+ {
+ bfd_vma tocadd;
+
+ tocadd = tocend - (tocval + 0x8000);
+ tocval += tocadd;
+ isym.n_value += tocadd;
+ }
+
+ finfo->toc_symindx = output_index;
+ xcoff_data (finfo->output_bfd)->toc = tocval;
+ xcoff_data (finfo->output_bfd)->sntoc =
+ (*csectpp)->output_section->target_index;
+ require = true;
+ }
+ }
+
+ /* If we are stripping all symbols, we want to skip this one. */
+ if (! skip
+ && finfo->info->strip == strip_all)
+ skip = true;
+
+ /* We can skip resolved external references. */
+ if (! skip
+ && isym.n_sclass == C_EXT
+ && smtyp == XTY_ER
+ && (*sym_hash)->root.type != bfd_link_hash_undefined)
+ skip = true;
+
+ /* We can skip common symbols if they got defined somewhere
+ else. */
+ if (! skip
+ && isym.n_sclass == C_EXT
+ && smtyp == XTY_CM
+ && ((*sym_hash)->root.type != bfd_link_hash_common
+ || (*sym_hash)->root.u.c.p->section != *csectpp)
+ && ((*sym_hash)->root.type != bfd_link_hash_defined
+ || (*sym_hash)->root.u.def.section != *csectpp))
+ skip = true;
+
+ /* Skip local symbols if we are discarding them. */
+ if (! skip
+ && finfo->info->discard == discard_all
+ && isym.n_sclass != C_EXT
+ && (isym.n_sclass != C_HIDEXT
+ || smtyp != XTY_SD))
+ skip = true;
+
+ /* If we stripping debugging symbols, and this is a debugging
+ symbol, then skip it. */
+ if (! skip
+ && finfo->info->strip == strip_debugger
+ && isym.n_scnum == N_DEBUG)
+ skip = true;
+
+ /* If some symbols are stripped based on the name, work out the
+ name and decide whether to skip this symbol. We don't handle
+ this correctly for symbols whose names are in the .debug
+ section; to get it right we would need a new bfd_strtab_hash
+ function to return the string given the index. */
+ if (! skip
+ && (finfo->info->strip == strip_some
+ || finfo->info->discard == discard_l)
+ && (debug_index == NULL || *debug_index == (unsigned long) -1))
+ {
+ const char *name;
+ char buf[SYMNMLEN + 1];
+
+ name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
+ if (name == NULL)
+ return false;
+
+ if ((finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash, name, false,
+ false) == NULL))
+ || (finfo->info->discard == discard_l
+ && (isym.n_sclass != C_EXT
+ && (isym.n_sclass != C_HIDEXT
+ || smtyp != XTY_SD))
+ && bfd_is_local_label_name (input_bfd, name)))
+ skip = true;
+ }
+
+ /* We can not skip the first TOC anchor. */
+ if (skip
+ && require
+ && finfo->info->strip != strip_all)
+ skip = false;
+
+ /* We now know whether we are to skip this symbol or not. */
+ if (! skip)
+ {
+ /* Adjust the symbol in order to output it. */
+
+ if (isym._n._n_n._n_zeroes == 0
+ && isym._n._n_n._n_offset != 0)
+ {
+ /* This symbol has a long name. Enter it in the string
+ table we are building. If *debug_index != -1, the
+ name has already been entered in the .debug section. */
+ if (debug_index != NULL && *debug_index != (unsigned long) -1)
+ isym._n._n_n._n_offset = *debug_index;
+ else
+ {
+ const char *name;
+ bfd_size_type indx;
+
+ name = _bfd_coff_internal_syment_name (input_bfd, &isym,
+ (char *) NULL);
+ if (name == NULL)
+ return false;
+ indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
+ if (indx == (bfd_size_type) -1)
+ return false;
+ isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
+ }
+ }
+
+ if (isym.n_sclass != C_BSTAT
+ && isym.n_sclass != C_ESTAT
+ && isym.n_sclass != C_DECL
+ && isym.n_scnum > 0)
+ {
+ isym.n_scnum = (*csectpp)->output_section->target_index;
+ isym.n_value += ((*csectpp)->output_section->vma
+ + (*csectpp)->output_offset
+ - (*csectpp)->vma);
+ }
+
+ /* The value of a C_FILE symbol is the symbol index of the
+ next C_FILE symbol. The value of the last C_FILE symbol
+ is -1. We try to get this right, below, just before we
+ write the symbols out, but in the general case we may
+ have to write the symbol out twice. */
+ if (isym.n_sclass == C_FILE)
+ {
+ if (finfo->last_file_index != -1
+ && finfo->last_file.n_value != (long) output_index)
+ {
+ /* We must correct the value of the last C_FILE entry. */
+ finfo->last_file.n_value = output_index;
+ if ((bfd_size_type) finfo->last_file_index >= syment_base)
+ {
+ /* The last C_FILE symbol is in this input file. */
+ bfd_coff_swap_sym_out (output_bfd,
+ (PTR) &finfo->last_file,
+ (PTR) (finfo->outsyms
+ + ((finfo->last_file_index
+ - syment_base)
+ * osymesz)));
+ }
+ else
+ {
+ /* We have already written out the last C_FILE
+ symbol. We need to write it out again. We
+ borrow *outsym temporarily. */
+ bfd_coff_swap_sym_out (output_bfd,
+ (PTR) &finfo->last_file,
+ (PTR) outsym);
+ if (bfd_seek (output_bfd,
+ (obj_sym_filepos (output_bfd)
+ + finfo->last_file_index * osymesz),
+ SEEK_SET) != 0
+ || (bfd_write (outsym, osymesz, 1, output_bfd)
+ != osymesz))
+ return false;
+ }
+ }
+
+ finfo->last_file_index = output_index;
+ finfo->last_file = isym;
+ }
+
+ /* The value of a C_BINCL or C_EINCL symbol is a file offset
+ into the line numbers. We update the symbol values when
+ we handle the line numbers. */
+ if (isym.n_sclass == C_BINCL
+ || isym.n_sclass == C_EINCL)
+ {
+ isym.n_value = finfo->line_filepos;
+ ++incls;
+ }
+
+ /* Output the symbol. */
+
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
+
+ *indexp = output_index;
+
+ if (isym.n_sclass == C_EXT)
+ {
+ long indx;
+ struct xcoff_link_hash_entry *h;
+
+ indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
+ / isymesz);
+ h = obj_xcoff_sym_hashes (input_bfd)[indx];
+ BFD_ASSERT (h != NULL);
+ h->indx = output_index;
+ }
+
+ /* If this is a symbol in the TOC which we may have merged
+ (class XMC_TC), remember the symbol index of the TOC
+ symbol. */
+ if (isym.n_sclass == C_HIDEXT
+ && aux.x_csect.x_smclas == XMC_TC
+ && *sym_hash != NULL)
+ {
+ BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
+ BFD_ASSERT ((*sym_hash)->toc_section != NULL);
+ (*sym_hash)->u.toc_indx = output_index;
+ }
+
+ output_index += add;
+ outsym += add * osymesz;
+ }
+
+ esym += add * isymesz;
+ isymp += add;
+ csectpp += add;
+ sym_hash += add;
+ if (debug_index != NULL)
+ debug_index += add;
+ ++indexp;
+ for (--add; add > 0; --add)
+ *indexp++ = -1;
+ }
+
+ /* Fix up the aux entries and the C_BSTAT symbols. This must be
+ done in a separate pass, because we don't know the correct symbol
+ indices until we have already decided which symbols we are going
+ to keep. */
+
+ esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
+ esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
+ isymp = finfo->internal_syms;
+ indexp = finfo->sym_indices;
+ csectpp = xcoff_data (input_bfd)->csects;
+ outsym = finfo->outsyms;
+ while (esym < esym_end)
+ {
+ int add;
+
+ add = 1 + isymp->n_numaux;
+
+ if (*indexp < 0)
+ esym += add * isymesz;
+ else
+ {
+ int i;
+
+ if (isymp->n_sclass == C_BSTAT)
+ {
+ struct internal_syment isym;
+ unsigned long indx;
+
+ /* The value of a C_BSTAT symbol is the symbol table
+ index of the containing csect. */
+ bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
+ indx = isym.n_value;
+ if (indx < obj_raw_syment_count (input_bfd))
+ {
+ long symindx;
+
+ symindx = finfo->sym_indices[indx];
+ if (symindx < 0)
+ isym.n_value = 0;
+ else
+ isym.n_value = symindx;
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
+ (PTR) outsym);
+ }
+ }
+
+ esym += isymesz;
+ outsym += osymesz;
+
+ for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
+ {
+ union internal_auxent aux;
+
+ bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
+ isymp->n_sclass, i, isymp->n_numaux,
+ (PTR) &aux);
+
+ if (isymp->n_sclass == C_FILE)
+ {
+ /* This is the file name (or some comment put in by
+ the compiler). If it is long, we must put it in
+ the string table. */
+ if (aux.x_file.x_n.x_zeroes == 0
+ && aux.x_file.x_n.x_offset != 0)
+ {
+ const char *filename;
+ bfd_size_type indx;
+
+ BFD_ASSERT (aux.x_file.x_n.x_offset
+ >= STRING_SIZE_SIZE);
+ if (strings == NULL)
+ {
+ strings = _bfd_coff_read_string_table (input_bfd);
+ if (strings == NULL)
+ return false;
+ }
+ filename = strings + aux.x_file.x_n.x_offset;
+ indx = _bfd_stringtab_add (finfo->strtab, filename,
+ hash, copy);
+ if (indx == (bfd_size_type) -1)
+ return false;
+ aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
+ }
+ }
+ else if ((isymp->n_sclass == C_EXT
+ || isymp->n_sclass == C_HIDEXT)
+ && i + 1 == isymp->n_numaux)
+ {
+ /* We don't support type checking. I don't know if
+ anybody does. */
+ aux.x_csect.x_parmhash = 0;
+ /* I don't think anybody uses these fields, but we'd
+ better clobber them just in case. */
+ aux.x_csect.x_stab = 0;
+ aux.x_csect.x_snstab = 0;
+ if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
+ {
+ unsigned long indx;
+
+ indx = aux.x_csect.x_scnlen.l;
+ if (indx < obj_raw_syment_count (input_bfd))
+ {
+ long symindx;
+
+ symindx = finfo->sym_indices[indx];
+ if (symindx < 0)
+ aux.x_sym.x_tagndx.l = 0;
+ else
+ aux.x_sym.x_tagndx.l = symindx;
+ }
+ }
+ }
+ else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
+ {
+ unsigned long indx;
+
+ if (ISFCN (isymp->n_type)
+ || ISTAG (isymp->n_sclass)
+ || isymp->n_sclass == C_BLOCK
+ || isymp->n_sclass == C_FCN)
+ {
+ indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
+ if (indx > 0
+ && indx < obj_raw_syment_count (input_bfd))
+ {
+ /* We look forward through the symbol for
+ the index of the next symbol we are going
+ to include. I don't know if this is
+ entirely right. */
+ while (finfo->sym_indices[indx] < 0
+ && indx < obj_raw_syment_count (input_bfd))
+ ++indx;
+ if (indx >= obj_raw_syment_count (input_bfd))
+ indx = output_index;
+ else
+ indx = finfo->sym_indices[indx];
+ aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
+ }
+ }
+
+ indx = aux.x_sym.x_tagndx.l;
+ if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
+ {
+ long symindx;
+
+ symindx = finfo->sym_indices[indx];
+ if (symindx < 0)
+ aux.x_sym.x_tagndx.l = 0;
+ else
+ aux.x_sym.x_tagndx.l = symindx;
+ }
+ }
+
+ /* Copy over the line numbers, unless we are stripping
+ them. We do this on a symbol by symbol basis in
+ order to more easily handle garbage collection. */
+ if ((isymp->n_sclass == C_EXT
+ || isymp->n_sclass == C_HIDEXT)
+ && i == 0
+ && isymp->n_numaux > 1
+ && ISFCN (isymp->n_type)
+ && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
+ {
+ if (finfo->info->strip != strip_none
+ && finfo->info->strip != strip_some)
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
+ else
+ {
+ asection *enclosing;
+ unsigned int enc_count;
+ bfd_size_type linoff;
+ struct internal_lineno lin;
+
+ o = *csectpp;
+ enclosing = xcoff_section_data (abfd, o)->enclosing;
+ enc_count = xcoff_section_data (abfd, o)->lineno_count;
+ if (oline != enclosing)
+ {
+ if (bfd_seek (input_bfd,
+ enclosing->line_filepos,
+ SEEK_SET) != 0
+ || (bfd_read (finfo->linenos, linesz,
+ enc_count, input_bfd)
+ != linesz * enc_count))
+ return false;
+ oline = enclosing;
+ }
+
+ linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
+ - enclosing->line_filepos);
+
+ bfd_coff_swap_lineno_in (input_bfd,
+ (PTR) (finfo->linenos + linoff),
+ (PTR) &lin);
+ if (lin.l_lnno != 0
+ || ((bfd_size_type) lin.l_addr.l_symndx
+ != ((esym
+ - isymesz
+ - ((bfd_byte *)
+ obj_coff_external_syms (input_bfd)))
+ / isymesz)))
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
+ else
+ {
+ bfd_byte *linpend, *linp;
+ bfd_vma offset;
+ bfd_size_type count;
+
+ lin.l_addr.l_symndx = *indexp;
+ bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
+ (PTR) (finfo->linenos
+ + linoff));
+
+ linpend = (finfo->linenos
+ + enc_count * linesz);
+ offset = (o->output_section->vma
+ + o->output_offset
+ - o->vma);
+ for (linp = finfo->linenos + linoff + linesz;
+ linp < linpend;
+ linp += linesz)
+ {
+ bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
+ (PTR) &lin);
+ if (lin.l_lnno == 0)
+ break;
+ lin.l_addr.l_paddr += offset;
+ bfd_coff_swap_lineno_out (output_bfd,
+ (PTR) &lin,
+ (PTR) linp);
+ }
+
+ count = (linp - (finfo->linenos + linoff)) / linesz;
+
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
+ (o->output_section->line_filepos
+ + o->output_section->lineno_count * linesz);
+
+ if (bfd_seek (output_bfd,
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
+ SEEK_SET) != 0
+ || (bfd_write (finfo->linenos + linoff,
+ linesz, count, output_bfd)
+ != linesz * count))
+ return false;
+
+ o->output_section->lineno_count += count;
+
+ if (incls > 0)
+ {
+ struct internal_syment *iisp, *iispend;
+ long *iindp;
+ bfd_byte *oos;
+ int iiadd;
+
+ /* Update any C_BINCL or C_EINCL symbols
+ that refer to a line number in the
+ range we just output. */
+ iisp = finfo->internal_syms;
+ iispend = (iisp
+ + obj_raw_syment_count (input_bfd));
+ iindp = finfo->sym_indices;
+ oos = finfo->outsyms;
+ while (iisp < iispend)
+ {
+ if (*iindp >= 0
+ && (iisp->n_sclass == C_BINCL
+ || iisp->n_sclass == C_EINCL)
+ && ((bfd_size_type) iisp->n_value
+ >= enclosing->line_filepos + linoff)
+ && ((bfd_size_type) iisp->n_value
+ < (enclosing->line_filepos
+ + enc_count * linesz)))
+ {
+ struct internal_syment iis;
+
+ bfd_coff_swap_sym_in (output_bfd,
+ (PTR) oos,
+ (PTR) &iis);
+ iis.n_value =
+ (iisp->n_value
+ - enclosing->line_filepos
+ - linoff
+ + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
+ bfd_coff_swap_sym_out (output_bfd,
+ (PTR) &iis,
+ (PTR) oos);
+ --incls;
+ }
+
+ iiadd = 1 + iisp->n_numaux;
+ if (*iindp >= 0)
+ oos += iiadd * osymesz;
+ iisp += iiadd;
+ iindp += iiadd;
+ }
+ }
+ }
+ }
+ }
+
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
+ isymp->n_sclass, i, isymp->n_numaux,
+ (PTR) outsym);
+ outsym += osymesz;
+ esym += isymesz;
+ }
+ }
+
+ indexp += add;
+ isymp += add;
+ csectpp += add;
+ }
+
+ /* If we swapped out a C_FILE symbol, guess that the next C_FILE
+ symbol will be the first symbol in the next input file. In the
+ normal case, this will save us from writing out the C_FILE symbol
+ again. */
+ if (finfo->last_file_index != -1
+ && (bfd_size_type) finfo->last_file_index >= syment_base)
+ {
+ finfo->last_file.n_value = output_index;
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
+ (PTR) (finfo->outsyms
+ + ((finfo->last_file_index - syment_base)
+ * osymesz)));
+ }
+
+ /* Write the modified symbols to the output file. */
+ if (outsym > finfo->outsyms)
+ {
+ if (bfd_seek (output_bfd,
+ obj_sym_filepos (output_bfd) + syment_base * osymesz,
+ SEEK_SET) != 0
+ || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
+ output_bfd)
+ != (bfd_size_type) (outsym - finfo->outsyms)))
+ return false;
+
+ BFD_ASSERT ((obj_raw_syment_count (output_bfd)
+ + (outsym - finfo->outsyms) / osymesz)
+ == output_index);
+
+ obj_raw_syment_count (output_bfd) = output_index;
+ }
+
+ /* Don't let the linker relocation routines discard the symbols. */
+ keep_syms = obj_coff_keep_syms (input_bfd);
+ obj_coff_keep_syms (input_bfd) = true;
+
+ /* Relocate the contents of each section. */
+ for (o = input_bfd->sections; o != NULL; o = o->next)
+ {
+ bfd_byte *contents;
+
+ if (! o->linker_mark)
+ {
+ /* This section was omitted from the link. */
+ continue;
+ }
+
+ if ((o->flags & SEC_HAS_CONTENTS) == 0
+ || o->_raw_size == 0
+ || (o->flags & SEC_IN_MEMORY) != 0)
+ continue;
+
+ /* We have set filepos correctly for the sections we created to
+ represent csects, so bfd_get_section_contents should work. */
+ if (coff_section_data (input_bfd, o) != NULL
+ && coff_section_data (input_bfd, o)->contents != NULL)
+ contents = coff_section_data (input_bfd, o)->contents;
+ else
+ {
+ if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
+ (file_ptr) 0, o->_raw_size))
+ return false;
+ contents = finfo->contents;
+ }
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ int target_index;
+ struct internal_reloc *internal_relocs;
+ struct internal_reloc *irel;
+ bfd_vma offset;
+ struct internal_reloc *irelend;
+ struct xcoff_link_hash_entry **rel_hash;
+ long r_symndx;
+
+ /* Read in the relocs. */
+ target_index = o->output_section->target_index;
+ internal_relocs = (xcoff_read_internal_relocs
+ (input_bfd, o, false, finfo->external_relocs,
+ true,
+ (finfo->section_info[target_index].relocs
+ + o->output_section->reloc_count)));
+ if (internal_relocs == NULL)
+ return false;
+
+ /* Call processor specific code to relocate the section
+ contents. */
+ if (! bfd_coff_relocate_section (output_bfd, finfo->info,
+ input_bfd, o,
+ contents,
+ internal_relocs,
+ finfo->internal_syms,
+ xcoff_data (input_bfd)->csects))
+ return false;
+
+ offset = o->output_section->vma + o->output_offset - o->vma;
+ irel = internal_relocs;
+ irelend = irel + o->reloc_count;
+ rel_hash = (finfo->section_info[target_index].rel_hashes
+ + o->output_section->reloc_count);
+ for (; irel < irelend; irel++, rel_hash++)
+ {
+ struct xcoff_link_hash_entry *h = NULL;
+ struct internal_ldrel ldrel;
+ boolean quiet;
+
+ *rel_hash = NULL;
+
+ /* Adjust the reloc address and symbol index. */
+
+ irel->r_vaddr += offset;
+
+ r_symndx = irel->r_symndx;
+
+ if (r_symndx == -1)
+ h = NULL;
+ else
+ h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
+
+ if (r_symndx != -1 && finfo->info->strip != strip_all)
+ {
+ if (h != NULL
+ && h->smclas != XMC_TD
+ && (irel->r_type == R_TOC
+ || irel->r_type == R_GL
+ || irel->r_type == R_TCL
+ || irel->r_type == R_TRL
+ || irel->r_type == R_TRLA))
+ {
+ /* This is a TOC relative reloc with a symbol
+ attached. The symbol should be the one which
+ this reloc is for. We want to make this
+ reloc against the TOC address of the symbol,
+ not the symbol itself. */
+ BFD_ASSERT (h->toc_section != NULL);
+ BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
+ if (h->u.toc_indx != -1)
+ irel->r_symndx = h->u.toc_indx;
+ else
+ {
+ struct xcoff_toc_rel_hash *n;
+ struct xcoff_link_section_info *si;
+
+ n = ((struct xcoff_toc_rel_hash *)
+ bfd_alloc (finfo->output_bfd,
+ sizeof (struct xcoff_toc_rel_hash)));
+ if (n == NULL)
+ return false;
+ si = finfo->section_info + target_index;
+ n->next = si->toc_rel_hashes;
+ n->h = h;
+ n->rel = irel;
+ si->toc_rel_hashes = n;
+ }
+ }
+ else if (h != NULL)
+ {
+ /* This is a global symbol. */
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
+ {
+ /* This symbol is being written at the end
+ of the file, and we do not yet know the
+ symbol index. We save the pointer to the
+ hash table entry in the rel_hash list.
+ We set the indx field to -2 to indicate
+ that this symbol must not be stripped. */
+ *rel_hash = h;
+ h->indx = -2;
+ }
+ }
+ else
+ {
+ long indx;
+
+ indx = finfo->sym_indices[r_symndx];
+
+ if (indx == -1)
+ {
+ struct internal_syment *is;
+
+ /* Relocations against a TC0 TOC anchor are
+ automatically transformed to be against
+ the TOC anchor in the output file. */
+ is = finfo->internal_syms + r_symndx;
+ if (is->n_sclass == C_HIDEXT
+ && is->n_numaux > 0)
+ {
+ PTR auxptr;
+ union internal_auxent aux;
+
+ auxptr = ((PTR)
+ (((bfd_byte *)
+ obj_coff_external_syms (input_bfd))
+ + ((r_symndx + is->n_numaux)
+ * isymesz)));
+ bfd_coff_swap_aux_in (input_bfd, auxptr,
+ is->n_type, is->n_sclass,
+ is->n_numaux - 1,
+ is->n_numaux,
+ (PTR) &aux);
+ if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
+ && aux.x_csect.x_smclas == XMC_TC0)
+ indx = finfo->toc_symindx;
+ }
+ }
+
+ if (indx != -1)
+ irel->r_symndx = indx;
+ else
+ {
+ struct internal_syment *is;
+ const char *name;
+ char buf[SYMNMLEN + 1];
+
+ /* This reloc is against a symbol we are
+ stripping. It would be possible to handle
+ this case, but I don't think it's worth it. */
+ is = finfo->internal_syms + r_symndx;
+
+ name = (_bfd_coff_internal_syment_name
+ (input_bfd, is, buf));
+ if (name == NULL)
+ return false;
+
+ if (! ((*finfo->info->callbacks->unattached_reloc)
+ (finfo->info, name, input_bfd, o,
+ irel->r_vaddr)))
+ return false;
+ }
+ }
+ }
+
+ quiet = false;
+ switch (irel->r_type)
+ {
+ default:
+ if (h == NULL
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common)
+ break;
+ /* Fall through. */
+ case R_POS:
+ case R_NEG:
+ case R_RL:
+ case R_RLA:
+ /* This reloc needs to be copied into the .loader
+ section. */
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (r_symndx == -1)
+ ldrel.l_symndx = -1;
+ else if (h == NULL
+ || (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common))
+ {
+ asection *sec;
+
+ if (h == NULL)
+ sec = xcoff_data (input_bfd)->csects[r_symndx];
+ else if (h->root.type == bfd_link_hash_common)
+ sec = h->root.u.c.p->section;
+ else
+ sec = h->root.u.def.section;
+ sec = sec->output_section;
+
+ if (strcmp (sec->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (sec->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (sec->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (input_bfd),
+ sec->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ }
+ else
+ {
+ if (! finfo->info->relocateable
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (h->flags & XCOFF_IMPORT) == 0)
+ {
+ /* We already called the undefined_symbol
+ callback for this relocation, in
+ _bfd_ppc_xcoff_relocate_section. Don't
+ issue any more warnings. */
+ quiet = true;
+ }
+ if (h->ldindx < 0 && ! quiet)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' in loader reloc but not loader sym"),
+ bfd_get_filename (input_bfd),
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ ldrel.l_symndx = h->ldindx;
+ }
+ ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
+ ldrel.l_rsecnm = o->output_section->target_index;
+ if (xcoff_hash_table (finfo->info)->textro
+ && strcmp (o->output_section->name, ".text") == 0
+ && ! quiet)
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in read-only section %s"),
+ bfd_get_filename (input_bfd),
+ bfd_get_section_name (finfo->output_bfd,
+ o->output_section));
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+ xcoff_swap_ldrel_out (output_bfd, &ldrel,
+ finfo->ldrel);
+ BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ);
+ ++finfo->ldrel;
+ break;
+
+ case R_TOC:
+ case R_GL:
+ case R_TCL:
+ case R_TRL:
+ case R_TRLA:
+ /* We should never need a .loader reloc for a TOC
+ relative reloc. */
+ break;
+ }
+ }
+
+ o->output_section->reloc_count += o->reloc_count;
+ }
+
+ /* Write out the modified section contents. */
+ if (! bfd_set_section_contents (output_bfd, o->output_section,
+ contents, o->output_offset,
+ (o->_cooked_size != 0
+ ? o->_cooked_size
+ : o->_raw_size)))
+ return false;
+ }
+
+ obj_coff_keep_syms (input_bfd) = keep_syms;
+
+ if (! finfo->info->keep_memory)
+ {
+ if (! _bfd_coff_free_symbols (input_bfd))
+ return false;
+ }
+
+ return true;
+}
+
+#undef N_TMASK
+#undef N_BTSHFT
+
+/* Write out a non-XCOFF global symbol. */
+
+static boolean
+xcoff_write_global_symbol (h, p)
+ struct xcoff_link_hash_entry *h;
+ PTR p;
+{
+ struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p;
+ bfd *output_bfd;
+ bfd_byte *outsym;
+ struct internal_syment isym;
+ union internal_auxent aux;
+
+ output_bfd = finfo->output_bfd;
+ outsym = finfo->outsyms;
+
+ /* If this symbol was garbage collected, just skip it. */
+ if (xcoff_hash_table (finfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0)
+ return true;
+
+ /* If we need a .loader section entry, write it out. */
+ if (h->ldsym != NULL)
+ {
+ struct internal_ldsym *ldsym;
+ bfd *impbfd;
+
+ ldsym = h->ldsym;
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ {
+ ldsym->l_value = 0;
+ ldsym->l_scnum = N_UNDEF;
+ ldsym->l_smtype = XTY_ER;
+ impbfd = h->root.u.undef.abfd;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ ldsym->l_value = (sec->output_section->vma
+ + sec->output_offset
+ + h->root.u.def.value);
+ ldsym->l_scnum = sec->output_section->target_index;
+ ldsym->l_smtype = XTY_SD;
+ impbfd = sec->owner;
+ }
+ else
+ abort ();
+
+ if (((h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_IMPORT) != 0)
+ ldsym->l_smtype |= L_IMPORT;
+ if (((h->flags & XCOFF_DEF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_EXPORT) != 0)
+ ldsym->l_smtype |= L_EXPORT;
+ if ((h->flags & XCOFF_ENTRY) != 0)
+ ldsym->l_smtype |= L_ENTRY;
+
+ ldsym->l_smclas = h->smclas;
+
+ if (ldsym->l_ifile == (bfd_size_type) -1)
+ ldsym->l_ifile = 0;
+ else if (ldsym->l_ifile == 0)
+ {
+ if ((ldsym->l_smtype & L_IMPORT) == 0)
+ ldsym->l_ifile = 0;
+ else if (impbfd == NULL)
+ ldsym->l_ifile = 0;
+ else
+ {
+ BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
+ ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
+ }
+ }
+
+ ldsym->l_parm = 0;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
+ xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3);
+ h->ldsym = NULL;
+ }
+
+ /* If this symbol needs global linkage code, write it out. */
+ if (h->root.type == bfd_link_hash_defined
+ && (h->root.u.def.section
+ == xcoff_hash_table (finfo->info)->linkage_section))
+ {
+ bfd_byte *p;
+ bfd_vma tocoff;
+ unsigned int i;
+
+ p = h->root.u.def.section->contents + h->root.u.def.value;
+
+ /* The first instruction in the global linkage code loads a
+ specific TOC element. */
+ tocoff = (h->descriptor->toc_section->output_section->vma
+ + h->descriptor->toc_section->output_offset
+ - xcoff_data (output_bfd)->toc);
+ if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
+ tocoff += h->descriptor->u.toc_offset;
+ bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p);
+ for (i = 0, p += 4;
+ i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0];
+ i++, p += 4)
+ bfd_put_32 (output_bfd, xcoff_glink_code[i], p);
+ }
+
+ /* If we created a TOC entry for this symbol, write out the required
+ relocs. */
+ if ((h->flags & XCOFF_SET_TOC) != 0)
+ {
+ asection *tocsec;
+ asection *osec;
+ int oindx;
+ struct internal_reloc *irel;
+ struct internal_ldrel ldrel;
+ struct internal_syment irsym;
+ union internal_auxent iraux;
+
+ tocsec = h->toc_section;
+ osec = tocsec->output_section;
+ oindx = osec->target_index;
+ irel = finfo->section_info[oindx].relocs + osec->reloc_count;
+ irel->r_vaddr = (osec->vma
+ + tocsec->output_offset
+ + h->u.toc_offset);
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
+ {
+ h->indx = -2;
+ irel->r_symndx = obj_raw_syment_count (output_bfd);
+ }
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ ldrel.l_vaddr = irel->r_vaddr;
+ ldrel.l_symndx = h->ldindx;
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+
+ /* We need to emit a symbol to define a csect which holds the
+ reloc. */
+ if (finfo->info->strip != strip_all)
+ {
+ if (strlen (h->root.root.string) <= SYMNMLEN)
+ strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN);
+ else
+ {
+ boolean hash;
+ bfd_size_type indx;
+
+ hash = true;
+ if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
+ hash = false;
+ indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string,
+ hash, false);
+ if (indx == (bfd_size_type) -1)
+ return false;
+ irsym._n._n_n._n_zeroes = 0;
+ irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
+ }
+
+ irsym.n_value = irel->r_vaddr;
+ irsym.n_scnum = osec->target_index;
+ irsym.n_sclass = C_HIDEXT;
+ irsym.n_type = T_NULL;
+ irsym.n_numaux = 1;
+
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym);
+ outsym += bfd_coff_symesz (output_bfd);
+
+ memset (&iraux, 0, sizeof iraux);
+ iraux.x_csect.x_smtyp = XTY_SD;
+ iraux.x_csect.x_scnlen.l = 4;
+ iraux.x_csect.x_smclas = XMC_TC;
+
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT,
+ 0, 1, (PTR) outsym);
+ outsym += bfd_coff_auxesz (output_bfd);
+
+ if (h->indx >= 0)
+ {
+ /* We aren't going to write out the symbols below, so we
+ need to write them out now. */
+ if (bfd_seek (output_bfd,
+ (obj_sym_filepos (output_bfd)
+ + (obj_raw_syment_count (output_bfd)
+ * bfd_coff_symesz (output_bfd))),
+ SEEK_SET) != 0
+ || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
+ output_bfd)
+ != (bfd_size_type) (outsym - finfo->outsyms)))
+ return false;
+ obj_raw_syment_count (output_bfd) +=
+ (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
+
+ outsym = finfo->outsyms;
+ }
+ }
+ }
+
+ /* If this symbol is a specially defined function descriptor, write
+ it out. The first word is the address of the function code
+ itself, the second word is the address of the TOC, and the third
+ word is zero. */
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0
+ && h->root.type == bfd_link_hash_defined
+ && (h->root.u.def.section
+ == xcoff_hash_table (finfo->info)->descriptor_section))
+ {
+ asection *sec;
+ asection *osec;
+ int oindx;
+ bfd_byte *p;
+ struct xcoff_link_hash_entry *hentry;
+ asection *esec;
+ struct internal_reloc *irel;
+ struct internal_ldrel ldrel;
+ asection *tsec;
+
+ sec = h->root.u.def.section;
+ osec = sec->output_section;
+ oindx = osec->target_index;
+ p = sec->contents + h->root.u.def.value;
+
+ hentry = h->descriptor;
+ BFD_ASSERT (hentry != NULL
+ && (hentry->root.type == bfd_link_hash_defined
+ || hentry->root.type == bfd_link_hash_defweak));
+ esec = hentry->root.u.def.section;
+ bfd_put_32 (output_bfd,
+ (esec->output_section->vma
+ + esec->output_offset
+ + hentry->root.u.def.value),
+ p);
+
+ irel = finfo->section_info[oindx].relocs + osec->reloc_count;
+ irel->r_vaddr = (osec->vma
+ + sec->output_offset
+ + h->root.u.def.value);
+ irel->r_symndx = esec->output_section->target_index;
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (strcmp (esec->output_section->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (esec->output_section->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (esec->output_section->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd),
+ esec->output_section->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+
+ bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
+
+ tsec = coff_section_from_bfd_index (output_bfd,
+ xcoff_data (output_bfd)->sntoc);
+
+ ++irel;
+ irel->r_vaddr = (osec->vma
+ + sec->output_offset
+ + h->root.u.def.value
+ + 4);
+ irel->r_symndx = tsec->output_section->target_index;
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (strcmp (tsec->output_section->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (tsec->output_section->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (tsec->output_section->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd),
+ tsec->output_section->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+ }
+
+ if (h->indx >= 0 || finfo->info->strip == strip_all)
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
+ if (h->indx != -2
+ && (finfo->info->strip == strip_all
+ || (finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash,
+ h->root.root.string, false, false)
+ == NULL))))
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
+ if (h->indx != -2
+ && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
+ memset (&aux, 0, sizeof aux);
+
+ h->indx = obj_raw_syment_count (output_bfd);
+
+ if (strlen (h->root.root.string) <= SYMNMLEN)
+ strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
+ else
+ {
+ boolean hash;
+ bfd_size_type indx;
+
+ hash = true;
+ if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
+ hash = false;
+ indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
+ false);
+ if (indx == (bfd_size_type) -1)
+ return false;
+ isym._n._n_n._n_zeroes = 0;
+ isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
+ }
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ {
+ isym.n_value = 0;
+ isym.n_scnum = N_UNDEF;
+ isym.n_sclass = C_EXT;
+ aux.x_csect.x_smtyp = XTY_ER;
+ }
+ else if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->smclas == XMC_XO)
+ {
+ BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section));
+ isym.n_value = h->root.u.def.value;
+ isym.n_scnum = N_UNDEF;
+ isym.n_sclass = C_EXT;
+ aux.x_csect.x_smtyp = XTY_ER;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ struct xcoff_link_size_list *l;
+
+ isym.n_value = (h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.value);
+ isym.n_scnum = h->root.u.def.section->output_section->target_index;
+ isym.n_sclass = C_HIDEXT;
+ aux.x_csect.x_smtyp = XTY_SD;
+
+ if ((h->flags & XCOFF_HAS_SIZE) != 0)
+ {
+ for (l = xcoff_hash_table (finfo->info)->size_list;
+ l != NULL;
+ l = l->next)
+ {
+ if (l->h == h)
+ {
+ aux.x_csect.x_scnlen.l = l->size;
+ break;
+ }
+ }
+ }
+ }
+ else if (h->root.type == bfd_link_hash_common)
+ {
+ isym.n_value = (h->root.u.c.p->section->output_section->vma
+ + h->root.u.c.p->section->output_offset);
+ isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
+ isym.n_sclass = C_EXT;
+ aux.x_csect.x_smtyp = XTY_CM;
+ aux.x_csect.x_scnlen.l = h->root.u.c.size;
+ }
+ else
+ abort ();
+
+ isym.n_type = T_NULL;
+ isym.n_numaux = 1;
+
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
+ outsym += bfd_coff_symesz (output_bfd);
+
+ aux.x_csect.x_smclas = h->smclas;
+
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
+ (PTR) outsym);
+ outsym += bfd_coff_auxesz (output_bfd);
+
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->smclas != XMC_XO)
+ {
+ /* We just output an SD symbol. Now output an LD symbol. */
+
+ h->indx += 2;
+
+ isym.n_sclass = C_EXT;
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
+ outsym += bfd_coff_symesz (output_bfd);
+
+ aux.x_csect.x_smtyp = XTY_LD;
+ aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
+
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
+ (PTR) outsym);
+ outsym += bfd_coff_auxesz (output_bfd);
+ }
+
+ if (bfd_seek (output_bfd,
+ (obj_sym_filepos (output_bfd)
+ + (obj_raw_syment_count (output_bfd)
+ * bfd_coff_symesz (output_bfd))),
+ SEEK_SET) != 0
+ || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd)
+ != (bfd_size_type) (outsym - finfo->outsyms)))
+ return false;
+ obj_raw_syment_count (output_bfd) +=
+ (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
+
+ return true;
+}
+
+/* Handle a link order which is supposed to generate a reloc. */
+
+static boolean
+xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
+ bfd *output_bfd;
+ struct xcoff_final_link_info *finfo;
+ asection *output_section;
+ struct bfd_link_order *link_order;
+{
+ reloc_howto_type *howto;
+ struct xcoff_link_hash_entry *h;
+ asection *hsec;
+ bfd_vma hval;
+ bfd_vma addend;
+ struct internal_reloc *irel;
+ struct xcoff_link_hash_entry **rel_hash_ptr;
+ struct internal_ldrel ldrel;
+
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ /* We need to somehow locate a symbol in the right section. The
+ symbol must either have a value of zero, or we must adjust
+ the addend by the value of the symbol. FIXME: Write this
+ when we need it. The old linker couldn't handle this anyhow. */
+ abort ();
+ }
+
+ howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
+ if (howto == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ h = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
+ link_order->u.reloc.p->u.name,
+ false, false, true));
+ if (h == NULL)
+ {
+ if (! ((*finfo->info->callbacks->unattached_reloc)
+ (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
+ (asection *) NULL, (bfd_vma) 0)))
+ return false;
+ return true;
+ }
+
+ if (h->root.type == bfd_link_hash_common)
+ {
+ hsec = h->root.u.c.p->section;
+ hval = 0;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ hsec = h->root.u.def.section;
+ hval = h->root.u.def.value;
+ }
+ else
+ {
+ hsec = NULL;
+ hval = 0;
+ }
+
+ addend = link_order->u.reloc.p->addend;
+ if (hsec != NULL)
+ addend += (hsec->output_section->vma
+ + hsec->output_offset
+ + hval);
+
+ if (addend != 0)
+ {
+ bfd_size_type size;
+ bfd_byte *buf;
+ bfd_reloc_status_type rstat;
+ boolean ok;
+
+ size = bfd_get_reloc_size (howto);
+ buf = (bfd_byte *) bfd_zmalloc (size);
+ if (buf == NULL)
+ return false;
+
+ rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
+ switch (rstat)
+ {
+ case bfd_reloc_ok:
+ break;
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ case bfd_reloc_overflow:
+ if (! ((*finfo->info->callbacks->reloc_overflow)
+ (finfo->info, link_order->u.reloc.p->u.name,
+ howto->name, addend, (bfd *) NULL, (asection *) NULL,
+ (bfd_vma) 0)))
+ {
+ free (buf);
+ return false;
+ }
+ break;
+ }
+ ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
+ (file_ptr) link_order->offset, size);
+ free (buf);
+ if (! ok)
+ return false;
+ }
+
+ /* Store the reloc information in the right place. It will get
+ swapped and written out at the end of the final_link routine. */
+
+ irel = (finfo->section_info[output_section->target_index].relocs
+ + output_section->reloc_count);
+ rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
+ + output_section->reloc_count);
+
+ memset (irel, 0, sizeof (struct internal_reloc));
+ *rel_hash_ptr = NULL;
+
+ irel->r_vaddr = output_section->vma + link_order->offset;
+
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
+ {
+ /* Set the index to -2 to force this symbol to get written out. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
+ irel->r_symndx = 0;
+ }
+
+ irel->r_type = howto->type;
+ irel->r_size = howto->bitsize - 1;
+ if (howto->complain_on_overflow == complain_overflow_signed)
+ irel->r_size |= 0x80;
+
+ ++output_section->reloc_count;
+
+ /* Now output the reloc to the .loader section. */
+
+ ldrel.l_vaddr = irel->r_vaddr;
+
+ if (hsec != NULL)
+ {
+ const char *secname;
+
+ secname = hsec->output_section->name;
+
+ if (strcmp (secname, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (secname, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (secname, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd), secname);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ }
+ else
+ {
+ if (h->ldindx < 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' in loader reloc but not loader sym"),
+ bfd_get_filename (output_bfd),
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ ldrel.l_symndx = h->ldindx;
+ }
+
+ ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
+ ldrel.l_rsecnm = output_section->target_index;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+
+ return true;
+}
+
+/* Sort relocs by VMA. This is called via qsort. */
+
+static int
+xcoff_sort_relocs (p1, p2)
+ const PTR p1;
+ const PTR p2;
+{
+ const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
+ const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
+
+ if (r1->r_vaddr > r2->r_vaddr)
+ return 1;
+ else if (r1->r_vaddr < r2->r_vaddr)
+ return -1;
+ else
+ return 0;
+}
+
+/* This is the relocation function for the RS/6000/POWER/PowerPC.
+ This is currently the only processor which uses XCOFF; I hope that
+ will never change. */
+
+boolean
+_bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd,
+ input_section, contents, relocs, syms,
+ sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ struct internal_reloc *relocs;
+ struct internal_syment *syms;
+ asection **sections;
+{
+ struct internal_reloc *rel;
+ struct internal_reloc *relend;
+
+ rel = relocs;
+ relend = rel + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ long symndx;
+ struct xcoff_link_hash_entry *h;
+ struct internal_syment *sym;
+ bfd_vma addend;
+ bfd_vma val;
+ struct reloc_howto_struct howto;
+ bfd_reloc_status_type rstat;
+
+ /* Relocation type R_REF is a special relocation type which is
+ merely used to prevent garbage collection from occurring for
+ the csect including the symbol which it references. */
+ if (rel->r_type == R_REF)
+ continue;
+
+ symndx = rel->r_symndx;
+
+ if (symndx == -1)
+ {
+ h = NULL;
+ sym = NULL;
+ addend = 0;
+ }
+ else
+ {
+ h = obj_xcoff_sym_hashes (input_bfd)[symndx];
+ sym = syms + symndx;
+ addend = - sym->n_value;
+ }
+
+ /* We build the howto information on the fly. */
+
+ howto.type = rel->r_type;
+ howto.rightshift = 0;
+ howto.size = 2;
+ howto.bitsize = (rel->r_size & 0x1f) + 1;
+ howto.pc_relative = false;
+ howto.bitpos = 0;
+ if ((rel->r_size & 0x80) != 0)
+ howto.complain_on_overflow = complain_overflow_signed;
+ else
+ howto.complain_on_overflow = complain_overflow_bitfield;
+ howto.special_function = NULL;
+ howto.name = "internal";
+ howto.partial_inplace = true;
+ if (howto.bitsize == 32)
+ howto.src_mask = howto.dst_mask = 0xffffffff;
+ else
+ {
+ howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1;
+ if (howto.bitsize == 16)
+ howto.size = 1;
+ }
+ howto.pcrel_offset = false;
+
+ val = 0;
+
+ if (h == NULL)
+ {
+ asection *sec;
+
+ if (symndx == -1)
+ {
+ sec = bfd_abs_section_ptr;
+ val = 0;
+ }
+ else
+ {
+ sec = sections[symndx];
+ /* Hack to make sure we use the right TOC anchor value
+ if this reloc is against the TOC anchor. */
+ if (sec->name[3] == '0'
+ && strcmp (sec->name, ".tc0") == 0)
+ val = xcoff_data (output_bfd)->toc;
+ else
+ val = (sec->output_section->vma
+ + sec->output_offset
+ + sym->n_value
+ - sec->vma);
+ }
+ }
+ else
+ {
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ val = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if (h->root.type == bfd_link_hash_common)
+ {
+ asection *sec;
+
+ sec = h->root.u.c.p->section;
+ val = (sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0
+ || (h->flags & XCOFF_IMPORT) != 0)
+ {
+ /* Every symbol in a shared object is defined somewhere. */
+ val = 0;
+ }
+ else if (! info->relocateable)
+ {
+ if (! ((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd, input_section,
+ rel->r_vaddr - input_section->vma)))
+ return false;
+
+ /* Don't try to process the reloc. It can't help, and
+ it may generate another error. */
+ continue;
+ }
+ }
+
+ /* I took the relocation type definitions from two documents:
+ the PowerPC AIX Version 4 Application Binary Interface, First
+ Edition (April 1992), and the PowerOpen ABI, Big-Endian
+ 32-Bit Hardware Implementation (June 30, 1994). Differences
+ between the documents are noted below. */
+
+ switch (rel->r_type)
+ {
+ case R_RTB:
+ case R_RRTBI:
+ case R_RRTBA:
+ /* These relocs are defined by the PowerPC ABI to be
+ relative branches which use half of the difference
+ between the symbol and the program counter. I can't
+ quite figure out when this is useful. These relocs are
+ not defined by the PowerOpen ABI. */
+ default:
+ (*_bfd_error_handler)
+ (_("%s: unsupported relocation type 0x%02x"),
+ bfd_get_filename (input_bfd), (unsigned int) rel->r_type);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ case R_POS:
+ /* Simple positive relocation. */
+ break;
+ case R_NEG:
+ /* Simple negative relocation. */
+ val = - val;
+ break;
+ case R_REL:
+ /* Simple PC relative relocation. */
+ howto.pc_relative = true;
+ break;
+ case R_TOC:
+ /* TOC relative relocation. The value in the instruction in
+ the input file is the offset from the input file TOC to
+ the desired location. We want the offset from the final
+ TOC to the desired location. We have:
+ isym = iTOC + in
+ iinsn = in + o
+ osym = oTOC + on
+ oinsn = on + o
+ so we must change insn by on - in.
+ */
+ case R_GL:
+ /* Global linkage relocation. The value of this relocation
+ is the address of the entry in the TOC section. */
+ case R_TCL:
+ /* Local object TOC address. I can't figure out the
+ difference between this and case R_GL. */
+ case R_TRL:
+ /* TOC relative relocation. A TOC relative load instruction
+ which may be changed to a load address instruction.
+ FIXME: We don't currently implement this optimization. */
+ case R_TRLA:
+ /* TOC relative relocation. This is a TOC relative load
+ address instruction which may be changed to a load
+ instruction. FIXME: I don't know if this is the correct
+ implementation. */
+ if (h != NULL && h->smclas != XMC_TD)
+ {
+ if (h->toc_section == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry"),
+ bfd_get_filename (input_bfd), rel->r_vaddr,
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
+ val = (h->toc_section->output_section->vma
+ + h->toc_section->output_offset);
+ }
+
+ val = ((val - xcoff_data (output_bfd)->toc)
+ - (sym->n_value - xcoff_data (input_bfd)->toc));
+ addend = 0;
+ break;
+ case R_BA:
+ /* Absolute branch. We don't want to mess with the lower
+ two bits of the instruction. */
+ case R_CAI:
+ /* The PowerPC ABI defines this as an absolute call which
+ may be modified to become a relative call. The PowerOpen
+ ABI does not define this relocation type. */
+ case R_RBA:
+ /* Absolute branch which may be modified to become a
+ relative branch. */
+ case R_RBAC:
+ /* The PowerPC ABI defines this as an absolute branch to a
+ fixed address which may be modified to an absolute branch
+ to a symbol. The PowerOpen ABI does not define this
+ relocation type. */
+ case R_RBRC:
+ /* The PowerPC ABI defines this as an absolute branch to a
+ fixed address which may be modified to a relative branch.
+ The PowerOpen ABI does not define this relocation type. */
+ howto.src_mask &= ~3;
+ howto.dst_mask = howto.src_mask;
+ break;
+ case R_BR:
+ /* Relative branch. We don't want to mess with the lower
+ two bits of the instruction. */
+ case R_CREL:
+ /* The PowerPC ABI defines this as a relative call which may
+ be modified to become an absolute call. The PowerOpen
+ ABI does not define this relocation type. */
+ case R_RBR:
+ /* A relative branch which may be modified to become an
+ absolute branch. FIXME: We don't implement this,
+ although we should for symbols of storage mapping class
+ XMC_XO. */
+ howto.pc_relative = true;
+ howto.src_mask &= ~3;
+ howto.dst_mask = howto.src_mask;
+ break;
+ case R_RL:
+ /* The PowerPC AIX ABI describes this as a load which may be
+ changed to a load address. The PowerOpen ABI says this
+ is the same as case R_POS. */
+ break;
+ case R_RLA:
+ /* The PowerPC AIX ABI describes this as a load address
+ which may be changed to a load. The PowerOpen ABI says
+ this is the same as R_POS. */
+ break;
+ }
+
+ /* If we see an R_BR or R_RBR reloc which is jumping to global
+ linkage code, and it is followed by an appropriate cror nop
+ instruction, we replace the cror with lwz r2,20(r1). This
+ restores the TOC after the glink code. Contrariwise, if the
+ call is followed by a lwz r2,20(r1), but the call is not
+ going to global linkage code, we can replace the load with a
+ cror. */
+ if ((rel->r_type == R_BR || rel->r_type == R_RBR)
+ && h != NULL
+ && h->root.type == bfd_link_hash_defined
+ && (rel->r_vaddr - input_section->vma + 8
+ <= input_section->_cooked_size))
+ {
+ bfd_byte *pnext;
+ unsigned long next;
+
+ pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
+ next = bfd_get_32 (input_bfd, pnext);
+
+ /* The _ptrgl function is magic. It is used by the AIX
+ compiler to call a function through a pointer. */
+ if (h->smclas == XMC_GL
+ || strcmp (h->root.root.string, "._ptrgl") == 0)
+ {
+ if (next == 0x4def7b82 /* cror 15,15,15 */
+ || next == 0x4ffffb82) /* cror 31,31,31 */
+ bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
+ }
+ else
+ {
+ if (next == 0x80410014) /* lwz r1,20(r1) */
+ bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */
+ }
+ }
+
+ /* A PC relative reloc includes the section address. */
+ if (howto.pc_relative)
+ addend += input_section->vma;
+
+ rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section,
+ contents,
+ rel->r_vaddr - input_section->vma,
+ val, addend);
+
+ switch (rstat)
+ {
+ default:
+ abort ();
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+ char buf[SYMNMLEN + 1];
+ char howto_name[10];
+
+ if (symndx == -1)
+ name = "*ABS*";
+ else if (h != NULL)
+ name = h->root.root.string;
+ else
+ {
+ name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
+ if (name == NULL)
+ return false;
+ }
+ sprintf (howto_name, "0x%02x", rel->r_type);
+
+ if (! ((*info->callbacks->reloc_overflow)
+ (info, name, howto_name, (bfd_vma) 0, input_bfd,
+ input_section, rel->r_vaddr - input_section->vma)))
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
generated by cgit v1.1 at 2024-11-28 11:52:54 +0000