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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/mipsbsd.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'bfd/mipsbsd.c')
-rw-r--r--bfd/mipsbsd.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/bfd/mipsbsd.c b/bfd/mipsbsd.c
new file mode 100644
index 0000000..e7ba68d
--- /dev/null
+++ b/bfd/mipsbsd.c
@@ -0,0 +1,468 @@
+/* BFD backend for MIPS BSD (a.out) binaries.
+ Copyright (C) 1993, 94, 95, 97, 1998 Free Software Foundation, Inc.
+ Written by Ralph Campbell.
+
+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. */
+
+#define BYTES_IN_WORD 4
+/* #define ENTRY_CAN_BE_ZERO */
+#define N_HEADER_IN_TEXT(x) 1
+#define N_SHARED_LIB(x) 0
+#define N_TXTADDR(x) \
+ (N_MAGIC(x) != ZMAGIC ? (x).a_entry : /* object file or NMAGIC */\
+ TEXT_START_ADDR + EXEC_BYTES_SIZE /* no padding */\
+ )
+#define N_DATADDR(x) (N_TXTADDR(x)+N_TXTSIZE(x))
+#define TEXT_START_ADDR 4096
+#define TARGET_PAGE_SIZE 4096
+#define SEGMENT_SIZE TARGET_PAGE_SIZE
+#define DEFAULT_ARCH bfd_arch_mips
+#define MACHTYPE_OK(mtype) ((mtype) == M_UNKNOWN \
+ || (mtype) == M_MIPS1 || (mtype) == M_MIPS2)
+#define MY_symbol_leading_char '\0'
+
+#define MY(OP) CAT(mipsbsd_,OP)
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "libaout.h"
+
+#define SET_ARCH_MACH(ABFD, EXEC) \
+ MY(set_arch_mach)(ABFD, N_MACHTYPE (EXEC)); \
+ MY(choose_reloc_size)(ABFD);
+static void MY(set_arch_mach) PARAMS ((bfd *abfd, int machtype));
+static void MY(choose_reloc_size) PARAMS ((bfd *abfd));
+
+#define MY_write_object_contents MY(write_object_contents)
+static boolean MY(write_object_contents) PARAMS ((bfd *abfd));
+
+/* We can't use MY(x) here because it leads to a recursive call to CAT
+ when expanded inside JUMP_TABLE. */
+#define MY_bfd_reloc_type_lookup mipsbsd_reloc_howto_type_lookup
+#define MY_canonicalize_reloc mipsbsd_canonicalize_reloc
+
+#define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
+#define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols
+#define MY_final_link_callback unused
+#define MY_bfd_final_link _bfd_generic_final_link
+
+#define MY_backend_data &MY(backend_data)
+#define MY_BFD_TARGET
+
+#include "aout-target.h"
+
+static void
+MY(set_arch_mach) (abfd, machtype)
+ bfd *abfd;
+ int machtype;
+{
+ enum bfd_architecture arch;
+ long machine;
+
+ /* Determine the architecture and machine type of the object file. */
+ switch (machtype) {
+
+ case M_MIPS1:
+ arch = bfd_arch_mips;
+ machine = 3000;
+ break;
+
+ case M_MIPS2:
+ arch = bfd_arch_mips;
+ machine = 4000;
+ break;
+
+ default:
+ arch = bfd_arch_obscure;
+ machine = 0;
+ break;
+ }
+ bfd_set_arch_mach(abfd, arch, machine);
+}
+
+/* Determine the size of a relocation entry, based on the architecture */
+static void
+MY(choose_reloc_size) (abfd)
+ bfd *abfd;
+{
+ switch (bfd_get_arch(abfd)) {
+ case bfd_arch_sparc:
+ case bfd_arch_a29k:
+ case bfd_arch_mips:
+ obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
+ break;
+ default:
+ obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
+ break;
+ }
+}
+
+/* Write an object file in BSD a.out format.
+ Section contents have already been written. We write the
+ file header, symbols, and relocation. */
+
+static boolean
+MY(write_object_contents) (abfd)
+ bfd *abfd;
+{
+ struct external_exec exec_bytes;
+ struct internal_exec *execp = exec_hdr (abfd);
+
+ /* Magic number, maestro, please! */
+ switch (bfd_get_arch(abfd)) {
+ case bfd_arch_m68k:
+ switch (bfd_get_mach(abfd)) {
+ case bfd_mach_m68010:
+ N_SET_MACHTYPE(*execp, M_68010);
+ break;
+ default:
+ case bfd_mach_m68020:
+ N_SET_MACHTYPE(*execp, M_68020);
+ break;
+ }
+ break;
+ case bfd_arch_sparc:
+ N_SET_MACHTYPE(*execp, M_SPARC);
+ break;
+ case bfd_arch_i386:
+ N_SET_MACHTYPE(*execp, M_386);
+ break;
+ case bfd_arch_a29k:
+ N_SET_MACHTYPE(*execp, M_29K);
+ break;
+ case bfd_arch_mips:
+ switch (bfd_get_mach(abfd)) {
+ case 4000:
+ case 6000:
+ N_SET_MACHTYPE(*execp, M_MIPS2);
+ break;
+ default:
+ N_SET_MACHTYPE(*execp, M_MIPS1);
+ break;
+ }
+ break;
+ default:
+ N_SET_MACHTYPE(*execp, M_UNKNOWN);
+ }
+
+ MY(choose_reloc_size)(abfd);
+
+ WRITE_HEADERS(abfd, execp);
+
+ return true;
+}
+
+/*
+ * MIPS relocation types.
+ */
+#define MIPS_RELOC_32 0
+#define MIPS_RELOC_JMP 1
+#define MIPS_RELOC_WDISP16 2
+#define MIPS_RELOC_HI16 3
+#define MIPS_RELOC_HI16_S 4
+#define MIPS_RELOC_LO16 5
+
+/*
+ * This is only called when performing a BFD_RELOC_MIPS_JMP relocation.
+ * The jump destination address is formed from the upper 4 bits of the
+ * "current" program counter concatenated with the jump instruction's
+ * 26 bit field and two trailing zeros.
+ * If the destination address is not in the same segment as the "current"
+ * program counter, then we need to signal an error.
+ */
+static bfd_reloc_status_type
+mips_fix_jmp_addr (abfd,reloc_entry,symbol,data,input_section,output_bfd)
+ bfd *abfd;
+ arelent *reloc_entry;
+ struct symbol_cache_entry *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+{
+ bfd_vma relocation, pc;
+
+ /* If this is a partial relocation, just continue. */
+ if (output_bfd != (bfd *)NULL)
+ return bfd_reloc_continue;
+
+ /* If this is an undefined symbol, return error */
+ if (bfd_is_und_section (symbol->section)
+ && (symbol->flags & BSF_WEAK) == 0)
+ return bfd_reloc_undefined;
+
+ /*
+ * Work out which section the relocation is targetted at and the
+ * initial relocation command value.
+ */
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
+
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+
+ pc = input_section->output_section->vma + input_section->output_offset +
+ reloc_entry->address + 4;
+
+ if ((relocation & 0xF0000000) != (pc & 0xF0000000))
+ return bfd_reloc_overflow;
+
+ return bfd_reloc_continue;
+}
+
+/*
+ * This is only called when performing a BFD_RELOC_HI16_S relocation.
+ * We need to see if bit 15 is set in the result. If it is, we add
+ * 0x10000 and continue normally. This will compensate for the sign extension
+ * when the low bits are added at run time.
+ */
+static bfd_reloc_status_type
+mips_fix_hi16_s PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+
+static bfd_reloc_status_type
+mips_fix_hi16_s (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ bfd_vma relocation;
+
+ /* If this is a partial relocation, just continue. */
+ if (output_bfd != (bfd *)NULL)
+ return bfd_reloc_continue;
+
+ /* If this is an undefined symbol, return error */
+ if (bfd_is_und_section (symbol->section)
+ && (symbol->flags & BSF_WEAK) == 0)
+ return bfd_reloc_undefined;
+
+ /*
+ * Work out which section the relocation is targetted at and the
+ * initial relocation command value.
+ */
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
+
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+
+ if (relocation & 0x8000)
+ reloc_entry->addend += 0x10000;
+
+ return bfd_reloc_continue;
+}
+
+static reloc_howto_type mips_howto_table_ext[] = {
+ {MIPS_RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield, 0,
+ "32", false, 0, 0xffffffff, false},
+ {MIPS_RELOC_JMP, 2, 2, 26, false, 0, complain_overflow_dont,
+ mips_fix_jmp_addr,
+ "MIPS_JMP", false, 0, 0x03ffffff, false},
+ {MIPS_RELOC_WDISP16, 2, 2, 16, true, 0, complain_overflow_signed, 0,
+ "WDISP16", false, 0, 0x0000ffff, false},
+ {MIPS_RELOC_HI16, 16, 2, 16, false, 0, complain_overflow_bitfield, 0,
+ "HI16", false, 0, 0x0000ffff, false},
+ {MIPS_RELOC_HI16_S, 16, 2, 16, false, 0, complain_overflow_bitfield,
+ mips_fix_hi16_s,
+ "HI16_S", false, 0, 0x0000ffff, false},
+ {MIPS_RELOC_LO16, 0, 2, 16, false, 0, complain_overflow_dont, 0,
+ "LO16", false, 0, 0x0000ffff, false},
+};
+
+static reloc_howto_type *
+MY(reloc_howto_type_lookup) (abfd, code)
+ bfd *abfd;
+ bfd_reloc_code_real_type code;
+{
+
+ if (bfd_get_arch (abfd) != bfd_arch_mips)
+ return 0;
+
+ switch (code)
+ {
+ case BFD_RELOC_CTOR:
+ case BFD_RELOC_32:
+ return (&mips_howto_table_ext[MIPS_RELOC_32]);
+ case BFD_RELOC_MIPS_JMP:
+ return (&mips_howto_table_ext[MIPS_RELOC_JMP]);
+ case BFD_RELOC_16_PCREL_S2:
+ return (&mips_howto_table_ext[MIPS_RELOC_WDISP16]);
+ case BFD_RELOC_HI16:
+ return (&mips_howto_table_ext[MIPS_RELOC_HI16]);
+ case BFD_RELOC_HI16_S:
+ return (&mips_howto_table_ext[MIPS_RELOC_HI16_S]);
+ case BFD_RELOC_LO16:
+ return (&mips_howto_table_ext[MIPS_RELOC_LO16]);
+ default:
+ return 0;
+ }
+}
+
+/*
+ * This is just like the standard aoutx.h version but we need to do our
+ * own mapping of external reloc type values to howto entries.
+ */
+long
+MY(canonicalize_reloc)(abfd, section, relptr, symbols)
+ bfd *abfd;
+ sec_ptr section;
+ arelent **relptr;
+ asymbol **symbols;
+{
+ arelent *tblptr = section->relocation;
+ unsigned int count, c;
+ extern reloc_howto_type NAME(aout,ext_howto_table)[];
+
+ /* If we have already read in the relocation table, return the values. */
+ if (section->flags & SEC_CONSTRUCTOR) {
+ arelent_chain *chain = section->constructor_chain;
+
+ for (count = 0; count < section->reloc_count; count++) {
+ *relptr++ = &chain->relent;
+ chain = chain->next;
+ }
+ *relptr = 0;
+ return section->reloc_count;
+ }
+ if (tblptr && section->reloc_count) {
+ for (count = 0; count++ < section->reloc_count;)
+ *relptr++ = tblptr++;
+ *relptr = 0;
+ return section->reloc_count;
+ }
+
+ if (!NAME(aout,slurp_reloc_table)(abfd, section, symbols))
+ return -1;
+ tblptr = section->relocation;
+
+ /* fix up howto entries */
+ for (count = 0; count++ < section->reloc_count;)
+ {
+ c = tblptr->howto - NAME(aout,ext_howto_table);
+ tblptr->howto = &mips_howto_table_ext[c];
+
+ *relptr++ = tblptr++;
+ }
+ *relptr = 0;
+ return section->reloc_count;
+}
+
+static CONST struct aout_backend_data MY(backend_data) = {
+ 0, /* zmagic contiguous */
+ 1, /* text incl header */
+ 0, /* entry is text address */
+ 0, /* exec_hdr_flags */
+ TARGET_PAGE_SIZE, /* text vma */
+ MY_set_sizes,
+ 0, /* text size includes exec header */
+ 0, /* add_dynamic_symbols */
+ 0, /* add_one_symbol */
+ 0, /* link_dynamic_object */
+ 0, /* write_dynamic_symbol */
+ 0, /* check_dynamic_reloc */
+ 0 /* finish_dynamic_link */
+};
+
+const bfd_target aout_mips_little_vec =
+{
+ "a.out-mips-little", /* name */
+ bfd_target_aout_flavour,
+ BFD_ENDIAN_LITTLE, /* target byte order (little) */
+ BFD_ENDIAN_LITTLE, /* target headers byte order (little) */
+ (HAS_RELOC | EXEC_P | /* object flags */
+ HAS_LINENO | HAS_DEBUG |
+ HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
+ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
+ MY_symbol_leading_char,
+ ' ', /* ar_pad_char */
+ 15, /* ar_max_namelen */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
+ {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
+ bfd_generic_archive_p, MY_core_file_p},
+ {bfd_false, MY_mkobject, /* bfd_set_format */
+ _bfd_generic_mkarchive, bfd_false},
+ {bfd_false, MY_write_object_contents, /* bfd_write_contents */
+ _bfd_write_archive_contents, bfd_false},
+
+ BFD_JUMP_TABLE_GENERIC (MY),
+ BFD_JUMP_TABLE_COPY (MY),
+ BFD_JUMP_TABLE_CORE (MY),
+ BFD_JUMP_TABLE_ARCHIVE (MY),
+ BFD_JUMP_TABLE_SYMBOLS (MY),
+ BFD_JUMP_TABLE_RELOCS (MY),
+ BFD_JUMP_TABLE_WRITE (MY),
+ BFD_JUMP_TABLE_LINK (MY),
+ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+ (PTR) MY_backend_data,
+};
+
+const bfd_target aout_mips_big_vec =
+{
+ "a.out-mips-big", /* name */
+ bfd_target_aout_flavour,
+ BFD_ENDIAN_BIG, /* target byte order (big) */
+ BFD_ENDIAN_BIG, /* target headers byte order (big) */
+ (HAS_RELOC | EXEC_P | /* object flags */
+ HAS_LINENO | HAS_DEBUG |
+ HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
+ (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
+ MY_symbol_leading_char,
+ ' ', /* ar_pad_char */
+ 15, /* ar_max_namelen */
+ bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+ bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+ bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
+ bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+ bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+ bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
+ {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
+ bfd_generic_archive_p, MY_core_file_p},
+ {bfd_false, MY_mkobject, /* bfd_set_format */
+ _bfd_generic_mkarchive, bfd_false},
+ {bfd_false, MY_write_object_contents, /* bfd_write_contents */
+ _bfd_write_archive_contents, bfd_false},
+
+ BFD_JUMP_TABLE_GENERIC (MY),
+ BFD_JUMP_TABLE_COPY (MY),
+ BFD_JUMP_TABLE_CORE (MY),
+ BFD_JUMP_TABLE_ARCHIVE (MY),
+ BFD_JUMP_TABLE_SYMBOLS (MY),
+ BFD_JUMP_TABLE_RELOCS (MY),
+ BFD_JUMP_TABLE_WRITE (MY),
+ BFD_JUMP_TABLE_LINK (MY),
+ BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+ (PTR) MY_backend_data,
+};