mirrors/binutils-gdb
1
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-11-24 18:44:20 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity
8860ff2e51
binutils-gdb/bfd/nlm32-ppc.c

1046 lines
36 KiB
C
Raw Normal View History

19990502 sourceware import
1999-05-03 15:29:11 +08:00
/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
* Many files: Changes to avoid gcc warnings: Add ATTRIBUTE_UNUSED as appropriate. Use EMPTY_HOWTO as appropriate. Fill in structure initializations. Add casts. * reloc.c (EMPTY_HOWTO): Define. * bfd-in2.h: Rebuild. * coff-h8300.c (h8300_reloc16_extra_cases): Remove useless comparisons against 0. * elf32-sparc.c (elf32_sparc_merge_private_bfd_data): Change previous_ibfd_e_flags to unsigned long. * vms.h (struct vms_private_data_struct): Change section_count to unsigned. * vms-gsd.c (_bfd_vms_slurp_gsd): Change psect_idx to unsigned. (_bfd_vms_write_gsd): Change symnum to unsigned. * vms-hdr.c (_bfd_vms_write_hdr): Change symnum to unsigned. * vms-tir.c (etir_sta): Change psect to unsigned. (alloc_section): Change idx to unsigned. (tir_sta, tir_ctl): Change psect to unsigned. (_bfd_vms_write_tir): Change len and before to bfd_size_type. * vms.c (priv_section_count): Change to unsigned.
1999-07-12 18:30:21 +08:00
Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc.
19990502 sourceware import
1999-05-03 15:29:11 +08:00
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)
* Many files: Changes to avoid gcc warnings: Add ATTRIBUTE_UNUSED as appropriate. Use EMPTY_HOWTO as appropriate. Fill in structure initializations. Add casts. * reloc.c (EMPTY_HOWTO): Define. * bfd-in2.h: Rebuild. * coff-h8300.c (h8300_reloc16_extra_cases): Remove useless comparisons against 0. * elf32-sparc.c (elf32_sparc_merge_private_bfd_data): Change previous_ibfd_e_flags to unsigned long. * vms.h (struct vms_private_data_struct): Change section_count to unsigned. * vms-gsd.c (_bfd_vms_slurp_gsd): Change psect_idx to unsigned. (_bfd_vms_write_gsd): Change symnum to unsigned. * vms-hdr.c (_bfd_vms_write_hdr): Change symnum to unsigned. * vms-tir.c (etir_sta): Change psect to unsigned. (alloc_section): Change idx to unsigned. (tir_sta, tir_ctl): Change psect to unsigned. (_bfd_vms_write_tir): Change len and before to bfd_size_type. * vms.c (priv_section_count): Change to unsigned.
1999-07-12 18:30:21 +08:00
bfd *abfd ATTRIBUTE_UNUSED;
asection *sec ATTRIBUTE_UNUSED;
PTR data ATTRIBUTE_UNUSED;
bfd_vma offset ATTRIBUTE_UNUSED;
bfd_size_type count ATTRIBUTE_UNUSED;
19990502 sourceware import
1999-05-03 15:29:11 +08:00
{
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"
Reference in New Issue Copy Permalink