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-rw-r--r--bfd/nlm32-ppc.c1045
1 files changed, 1045 insertions, 0 deletions
diff --git a/bfd/nlm32-ppc.c b/bfd/nlm32-ppc.c
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--- /dev/null
+++ b/bfd/nlm32-ppc.c
@@ -0,0 +1,1045 @@
+/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
+ Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+
+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 "libbfd.h"
+
+/* The format of a PowerPC NLM changed. Define OLDFORMAT to get the
+ old format. */
+
+#define ARCH_SIZE 32
+
+#include "nlm/ppc-ext.h"
+#define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header
+
+#include "libnlm.h"
+
+#ifdef OLDFORMAT
+static boolean nlm_powerpc_backend_object_p
+ PARAMS ((bfd *));
+static boolean nlm_powerpc_write_prefix
+ PARAMS ((bfd *));
+#endif
+
+static boolean nlm_powerpc_read_reloc
+ PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
+static boolean nlm_powerpc_mangle_relocs
+ PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
+static boolean nlm_powerpc_read_import
+ PARAMS ((bfd *, nlmNAME(symbol_type) *));
+
+#ifdef OLDFORMAT
+static boolean nlm_powerpc_write_reloc
+ PARAMS ((bfd *, asection *, arelent *, int));
+#endif
+
+static boolean nlm_powerpc_write_import
+ PARAMS ((bfd *, asection *, arelent *));
+static boolean nlm_powerpc_write_external
+ PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
+
+#ifndef OLDFORMAT
+static boolean nlm_powerpc_set_public_section
+ PARAMS ((bfd *, nlmNAME(symbol_type) *));
+static bfd_vma nlm_powerpc_get_public_offset
+ PARAMS ((bfd *, asymbol *));
+#endif
+
+#ifdef OLDFORMAT
+
+/* The prefix header is only used in the old format. */
+
+/* PowerPC NLM's have a prefix header before the standard NLM. This
+ function reads it in, verifies the version, and seeks the bfd to
+ the location before the regular NLM header. */
+
+static boolean
+nlm_powerpc_backend_object_p (abfd)
+ bfd *abfd;
+{
+ struct nlm32_powerpc_external_prefix_header s;
+
+ if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
+ return false;
+
+ if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0
+ || bfd_h_get_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION)
+ return false;
+
+ return true;
+}
+
+/* Write out the prefix. */
+
+static boolean
+nlm_powerpc_write_prefix (abfd)
+ bfd *abfd;
+{
+ struct nlm32_powerpc_external_prefix_header s;
+
+ memset (&s, 0, sizeof s);
+ memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature);
+ bfd_h_put_32 (abfd, (bfd_vma) NLM32_POWERPC_HEADER_VERSION, s.headerVersion);
+ bfd_h_put_32 (abfd, (bfd_vma) 0, s.origins);
+
+ /* FIXME: What should we do about the date? */
+
+ if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
+ return false;
+
+ return true;
+}
+
+#endif /* OLDFORMAT */
+
+#ifndef OLDFORMAT
+
+/* There is only one type of reloc in a PowerPC NLM. */
+
+static reloc_howto_type nlm_powerpc_howto =
+ 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 */
+ "32", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false); /* pcrel_offset */
+
+/* Read a PowerPC NLM reloc. */
+
+static boolean
+nlm_powerpc_read_reloc (abfd, sym, secp, rel)
+ bfd *abfd;
+ nlmNAME(symbol_type) *sym;
+ asection **secp;
+ arelent *rel;
+{
+ bfd_byte temp[4];
+ bfd_vma val;
+ const char *name;
+
+ if (bfd_read (temp, sizeof (temp), 1, abfd) != sizeof (temp))
+ return false;
+
+ val = bfd_get_32 (abfd, temp);
+
+ /* The value is a word offset into either the code or data segment.
+ This is the location which needs to be adjusted.
+
+ The high bit is 0 if the value is an offset into the data
+ segment, or 1 if the value is an offset into the text segment.
+
+ If this is a relocation fixup rather than an imported symbol (the
+ sym argument is NULL), then the second most significant bit is 0
+ if the address of the data segment should be added to the
+ location addressed by the value, or 1 if the address of the text
+ segment should be added.
+
+ If this is an imported symbol, the second most significant bit is
+ not used and must be 0. */
+
+ if ((val & NLM_HIBIT) == 0)
+ name = NLM_INITIALIZED_DATA_NAME;
+ else
+ {
+ name = NLM_CODE_NAME;
+ val &=~ NLM_HIBIT;
+ }
+ *secp = bfd_get_section_by_name (abfd, name);
+
+ if (sym == NULL)
+ {
+ if ((val & (NLM_HIBIT >> 1)) == 0)
+ name = NLM_INITIALIZED_DATA_NAME;
+ else
+ {
+ name = NLM_CODE_NAME;
+ val &=~ (NLM_HIBIT >> 1);
+ }
+ rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
+ }
+
+ rel->howto = &nlm_powerpc_howto;
+
+ rel->address = val << 2;
+ rel->addend = 0;
+
+ return true;
+}
+
+#else /* OLDFORMAT */
+
+/* This reloc handling is only applicable to the old format. */
+
+/* How to process the various reloc types. PowerPC NLMs use XCOFF
+ reloc types, and I have just copied the XCOFF reloc table here. */
+
+static reloc_howto_type nlm_powerpc_howto_table[] =
+{
+ /* Standard 32 bit relocation. */
+ 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 */
+
+ /* 32 bit relocation, but store negative value. */
+ HOWTO (1, /* 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_NEG", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 32 bit PC relative relocation. */
+ HOWTO (2, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_REL", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 16 bit TOC relative relocation. */
+ HOWTO (3, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_TOC", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* I don't really know what this is. */
+ HOWTO (4, /* type */
+ 1, /* 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_RTB", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* External TOC relative symbol. */
+ HOWTO (5, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_GL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Local TOC relative symbol. */
+ HOWTO (6, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_TCL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ { 7 },
+
+ /* Non modifiable absolute branch. */
+ HOWTO (8, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_BA", /* name */
+ true, /* partial_inplace */
+ 0x3fffffc, /* src_mask */
+ 0x3fffffc, /* dst_mask */
+ false), /* pcrel_offset */
+
+ { 9 },
+
+ /* Non modifiable relative branch. */
+ HOWTO (0xa, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_BR", /* name */
+ true, /* partial_inplace */
+ 0x3fffffc, /* src_mask */
+ 0x3fffffc, /* dst_mask */
+ false), /* pcrel_offset */
+
+ { 0xb },
+
+ /* Indirect load. */
+ HOWTO (0xc, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_RL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Load address. */
+ HOWTO (0xd, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_RLA", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ { 0xe },
+
+ /* Non-relocating reference. */
+ HOWTO (0xf, /* 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_REF", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ { 0x10 },
+ { 0x11 },
+
+ /* TOC relative indirect load. */
+ HOWTO (0x12, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_TRL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* TOC relative load address. */
+ HOWTO (0x13, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_TRLA", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable relative branch. */
+ HOWTO (0x14, /* type */
+ 1, /* 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_RRTBI", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable absolute branch. */
+ HOWTO (0x15, /* type */
+ 1, /* 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_RRTBA", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable call absolute indirect. */
+ HOWTO (0x16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_CAI", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable call relative. */
+ HOWTO (0x17, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_REL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable branch absolute. */
+ HOWTO (0x18, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_RBA", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable branch absolute. */
+ HOWTO (0x19, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_RBAC", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable branch relative. */
+ HOWTO (0x1a, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_REL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Modifiable branch absolute. */
+ HOWTO (0x1b, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_REL", /* name */
+ true, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ false) /* pcrel_offset */
+};
+
+#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \
+ / sizeof nlm_powerpc_howto_table[0])
+
+/* Read a PowerPC NLM reloc. */
+
+static boolean
+nlm_powerpc_read_reloc (abfd, sym, secp, rel)
+ bfd *abfd;
+ nlmNAME(symbol_type) *sym;
+ asection **secp;
+ arelent *rel;
+{
+ struct nlm32_powerpc_external_reloc ext;
+ bfd_vma l_vaddr;
+ unsigned long l_symndx;
+ int l_rtype;
+ int l_rsecnm;
+ asection *code_sec, *data_sec, *bss_sec;
+
+ /* Read the reloc from the file. */
+ if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext)
+ return false;
+
+ /* Swap in the fields. */
+ l_vaddr = bfd_h_get_32 (abfd, ext.l_vaddr);
+ l_symndx = bfd_h_get_32 (abfd, ext.l_symndx);
+ l_rtype = bfd_h_get_16 (abfd, ext.l_rtype);
+ l_rsecnm = bfd_h_get_16 (abfd, ext.l_rsecnm);
+
+ /* Get the sections now, for convenience. */
+ code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+ data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+ bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
+
+ /* Work out the arelent fields. */
+ if (sym != NULL)
+ {
+ /* This is an import. sym_ptr_ptr is filled in by
+ nlm_canonicalize_reloc. */
+ rel->sym_ptr_ptr = NULL;
+ }
+ else
+ {
+ asection *sec;
+
+ if (l_symndx == 0)
+ sec = code_sec;
+ else if (l_symndx == 1)
+ sec = data_sec;
+ else if (l_symndx == 2)
+ sec = bss_sec;
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ rel->sym_ptr_ptr = sec->symbol_ptr_ptr;
+ }
+
+ rel->addend = 0;
+
+ BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT);
+
+ rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff);
+
+ BFD_ASSERT (rel->howto->name != NULL
+ && ((l_rtype & 0x8000) != 0
+ ? (rel->howto->complain_on_overflow
+ == complain_overflow_signed)
+ : (rel->howto->complain_on_overflow
+ == complain_overflow_bitfield))
+ && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1);
+
+ if (l_rsecnm == 0)
+ *secp = code_sec;
+ else if (l_rsecnm == 1)
+ {
+ *secp = data_sec;
+ l_vaddr -= bfd_section_size (abfd, code_sec);
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ rel->address = l_vaddr;
+
+ return true;
+}
+
+#endif /* OLDFORMAT */
+
+/* Mangle PowerPC NLM relocs for output. */
+
+static boolean
+nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count)
+ bfd *abfd;
+ asection *sec;
+ PTR data;
+ bfd_vma offset;
+ bfd_size_type count;
+{
+ return true;
+}
+
+/* Read a PowerPC NLM import record */
+
+static boolean
+nlm_powerpc_read_import (abfd, sym)
+ bfd *abfd;
+ nlmNAME(symbol_type) *sym;
+{
+ struct nlm_relent *nlm_relocs; /* relocation records for symbol */
+ bfd_size_type rcount; /* number of relocs */
+ bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */
+ unsigned char symlength; /* length of symbol name */
+ char *name;
+
+ if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
+ != sizeof (symlength))
+ return (false);
+ sym -> symbol.the_bfd = abfd;
+ name = bfd_alloc (abfd, symlength + 1);
+ if (name == NULL)
+ return false;
+ if (bfd_read (name, symlength, 1, abfd) != symlength)
+ return (false);
+ name[symlength] = '\0';
+ sym -> symbol.name = name;
+ sym -> symbol.flags = 0;
+ sym -> symbol.value = 0;
+ sym -> symbol.section = bfd_und_section_ptr;
+ if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
+ return (false);
+ rcount = bfd_h_get_32 (abfd, temp);
+ nlm_relocs = ((struct nlm_relent *)
+ bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
+ if (nlm_relocs == (struct nlm_relent *) NULL)
+ return false;
+ sym -> relocs = nlm_relocs;
+ sym -> rcnt = 0;
+ while (sym -> rcnt < rcount)
+ {
+ asection *section;
+
+ if (nlm_powerpc_read_reloc (abfd, sym, &section,
+ &nlm_relocs -> reloc)
+ == false)
+ return false;
+ nlm_relocs -> section = section;
+ nlm_relocs++;
+ sym -> rcnt++;
+ }
+ return true;
+}
+
+#ifndef OLDFORMAT
+
+/* Write a PowerPC NLM reloc. */
+
+static boolean
+nlm_powerpc_write_import (abfd, sec, rel)
+ bfd *abfd;
+ asection *sec;
+ arelent *rel;
+{
+ asymbol *sym;
+ bfd_vma val;
+ bfd_byte temp[4];
+
+ /* PowerPC NetWare only supports one kind of reloc. */
+ if (rel->addend != 0
+ || rel->howto == NULL
+ || rel->howto->rightshift != 0
+ || rel->howto->size != 2
+ || rel->howto->bitsize != 32
+ || rel->howto->bitpos != 0
+ || rel->howto->pc_relative
+ || (rel->howto->src_mask != 0xffffffff && rel->addend != 0)
+ || rel->howto->dst_mask != 0xffffffff)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ sym = *rel->sym_ptr_ptr;
+
+ /* The value we write out is the offset into the appropriate
+ segment, rightshifted by two. This offset is the section vma,
+ adjusted by the vma of the lowest section in that segment, plus
+ the address of the relocation. */
+ val = bfd_get_section_vma (abfd, sec) + rel->address;
+ if ((val & 3) != 0)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ val >>= 2;
+
+ /* The high bit is 0 if the reloc is in the data section, or 1 if
+ the reloc is in the code section. */
+ if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
+ val -= nlm_get_data_low (abfd);
+ else
+ {
+ val -= nlm_get_text_low (abfd);
+ val |= NLM_HIBIT;
+ }
+
+ if (! bfd_is_und_section (bfd_get_section (sym)))
+ {
+ /* This is an internal relocation fixup. The second most
+ significant bit is 0 if this is a reloc against the data
+ segment, or 1 if it is a reloc against the text segment. */
+ if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
+ val |= NLM_HIBIT >> 1;
+ }
+
+ bfd_put_32 (abfd, val, temp);
+ if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp))
+ return false;
+
+ return true;
+}
+
+#else /* OLDFORMAT */
+
+/* This is used for the reloc handling in the old format. */
+
+/* Write a PowerPC NLM reloc. */
+
+static boolean
+nlm_powerpc_write_reloc (abfd, sec, rel, indx)
+ bfd *abfd;
+ asection *sec;
+ arelent *rel;
+ int indx;
+{
+ struct nlm32_powerpc_external_reloc ext;
+ asection *code_sec, *data_sec, *bss_sec;
+ asymbol *sym;
+ asection *symsec;
+ unsigned long l_symndx;
+ int l_rtype;
+ int l_rsecnm;
+ reloc_howto_type *howto;
+ bfd_size_type address;
+
+ /* Get the sections now, for convenience. */
+ code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+ data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+ bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
+
+ sym = *rel->sym_ptr_ptr;
+ symsec = bfd_get_section (sym);
+ if (indx != -1)
+ {
+ BFD_ASSERT (bfd_is_und_section (symsec));
+ l_symndx = indx + 3;
+ }
+ else
+ {
+ if (symsec == code_sec)
+ l_symndx = 0;
+ else if (symsec == data_sec)
+ l_symndx = 1;
+ else if (symsec == bss_sec)
+ l_symndx = 2;
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ }
+
+ bfd_h_put_32 (abfd, (bfd_vma) l_symndx, ext.l_symndx);
+
+ for (howto = nlm_powerpc_howto_table;
+ howto < nlm_powerpc_howto_table + HOWTO_COUNT;
+ howto++)
+ {
+ if (howto->rightshift == rel->howto->rightshift
+ && howto->size == rel->howto->size
+ && howto->bitsize == rel->howto->bitsize
+ && howto->pc_relative == rel->howto->pc_relative
+ && howto->bitpos == rel->howto->bitpos
+ && (howto->partial_inplace == rel->howto->partial_inplace
+ || (! rel->howto->partial_inplace
+ && rel->addend == 0))
+ && (howto->src_mask == rel->howto->src_mask
+ || (rel->howto->src_mask == 0
+ && rel->addend == 0))
+ && howto->dst_mask == rel->howto->dst_mask
+ && howto->pcrel_offset == rel->howto->pcrel_offset)
+ break;
+ }
+ if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ l_rtype = howto->type;
+ if (howto->complain_on_overflow == complain_overflow_signed)
+ l_rtype |= 0x8000;
+ l_rtype |= (howto->bitsize - 1) << 8;
+ bfd_h_put_16 (abfd, (bfd_vma) l_rtype, ext.l_rtype);
+
+ address = rel->address;
+
+ if (sec == code_sec)
+ l_rsecnm = 0;
+ else if (sec == data_sec)
+ {
+ l_rsecnm = 1;
+ address += bfd_section_size (abfd, code_sec);
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ bfd_h_put_16 (abfd, (bfd_vma) l_rsecnm, ext.l_rsecnm);
+ bfd_h_put_32 (abfd, (bfd_vma) address, ext.l_vaddr);
+
+ if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext)
+ return false;
+
+ return true;
+}
+
+/* Write a PowerPC NLM import. */
+
+static boolean
+nlm_powerpc_write_import (abfd, sec, rel)
+ bfd *abfd;
+ asection *sec;
+ arelent *rel;
+{
+ return nlm_powerpc_write_reloc (abfd, sec, rel, -1);
+}
+
+#endif /* OLDFORMAT */
+
+/* Write a PowerPC NLM external symbol. This routine keeps a static
+ count of the symbol index. FIXME: I don't know if this is
+ necessary, and the index never gets reset. */
+
+static boolean
+nlm_powerpc_write_external (abfd, count, sym, relocs)
+ bfd *abfd;
+ bfd_size_type count;
+ asymbol *sym;
+ struct reloc_and_sec *relocs;
+{
+ unsigned int i;
+ bfd_byte len;
+ unsigned char temp[NLM_TARGET_LONG_SIZE];
+#ifdef OLDFORMAT
+ static int indx;
+#endif
+
+ len = strlen (sym->name);
+ if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte))
+ || bfd_write (sym->name, len, 1, abfd) != len)
+ return false;
+
+ bfd_put_32 (abfd, count, temp);
+ if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp))
+ return false;
+
+ for (i = 0; i < count; i++)
+ {
+#ifndef OLDFORMAT
+ if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel))
+ return false;
+#else
+ if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec,
+ relocs[i].rel, indx))
+ return false;
+#endif
+ }
+
+#ifdef OLDFORMAT
+ ++indx;
+#endif
+
+ return true;
+}
+
+#ifndef OLDFORMAT
+
+/* PowerPC Netware uses a word offset, not a byte offset, for public
+ symbols. */
+
+/* Set the section for a public symbol. */
+
+static boolean
+nlm_powerpc_set_public_section (abfd, sym)
+ bfd *abfd;
+ nlmNAME(symbol_type) *sym;
+{
+ if (sym->symbol.value & NLM_HIBIT)
+ {
+ sym->symbol.value &= ~NLM_HIBIT;
+ sym->symbol.flags |= BSF_FUNCTION;
+ sym->symbol.section =
+ bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+ }
+ else
+ {
+ sym->symbol.section =
+ bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+ }
+
+ sym->symbol.value <<= 2;
+
+ return true;
+}
+
+/* Get the offset to write out for a public symbol. */
+
+static bfd_vma
+nlm_powerpc_get_public_offset (abfd, sym)
+ bfd *abfd;
+ asymbol *sym;
+{
+ bfd_vma offset;
+ asection *sec;
+
+ offset = bfd_asymbol_value (sym);
+ sec = bfd_get_section (sym);
+ if (sec->flags & SEC_CODE)
+ {
+ offset -= nlm_get_text_low (abfd);
+ offset |= NLM_HIBIT;
+ }
+ else if (sec->flags & (SEC_DATA | SEC_ALLOC))
+ {
+ /* SEC_ALLOC is for the .bss section. */
+ offset -= nlm_get_data_low (abfd);
+ }
+ else
+ {
+ /* We can't handle an exported symbol that is not in the code or
+ data segment. */
+ bfd_set_error (bfd_error_invalid_operation);
+ /* FIXME: No way to return error. */
+ abort ();
+ }
+
+ return offset;
+}
+
+#endif /* ! defined (OLDFORMAT) */
+
+#include "nlmswap.h"
+
+static const struct nlm_backend_data nlm32_powerpc_backend =
+{
+ "NetWare PowerPC Module \032",
+ sizeof (Nlm32_powerpc_External_Fixed_Header),
+#ifndef OLDFORMAT
+ 0, /* optional_prefix_size */
+#else
+ sizeof (struct nlm32_powerpc_external_prefix_header),
+#endif
+ bfd_arch_powerpc,
+ 0,
+ false,
+#ifndef OLDFORMAT
+ 0, /* backend_object_p */
+ 0, /* write_prefix */
+#else
+ nlm_powerpc_backend_object_p,
+ nlm_powerpc_write_prefix,
+#endif
+ nlm_powerpc_read_reloc,
+ nlm_powerpc_mangle_relocs,
+ nlm_powerpc_read_import,
+ nlm_powerpc_write_import,
+#ifndef OLDFORMAT
+ nlm_powerpc_set_public_section,
+ nlm_powerpc_get_public_offset,
+#else
+ 0, /* set_public_section */
+ 0, /* get_public_offset */
+#endif
+ nlm_swap_fixed_header_in,
+ nlm_swap_fixed_header_out,
+ nlm_powerpc_write_external,
+ 0, /* write_export */
+};
+
+#define TARGET_BIG_NAME "nlm32-powerpc"
+#define TARGET_BIG_SYM nlmNAME(powerpc_vec)
+#define TARGET_BACKEND_DATA &nlm32_powerpc_backend
+
+#include "nlm-target.h"
generated by cgit v1.1 at 2024-11-04 10:04:11 +0000