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users/ARM/
...
users/hjl/
| Author | SHA1 | Date | |
|---|---|---|---|
|
|
68e7d8090b | ||
|
|
efc9f749f7 |
628
bfd/elf32-i386.c
628
bfd/elf32-i386.c
@@ -1208,7 +1208,7 @@ elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
|
||||
from R_TYPE. */
|
||||
|
||||
static bfd_boolean
|
||||
elf_i386_check_tls_transition (bfd *abfd, asection *sec,
|
||||
elf_i386_check_tls_transition (asection *sec,
|
||||
bfd_byte *contents,
|
||||
Elf_Internal_Shdr *symtab_hdr,
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||||
struct elf_link_hash_entry **sym_hashes,
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||||
@@ -1221,22 +1221,6 @@ elf_i386_check_tls_transition (bfd *abfd, asection *sec,
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||||
struct elf_link_hash_entry *h;
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||||
bfd_vma offset;
|
||||
|
||||
/* Get the section contents. */
|
||||
if (contents == NULL)
|
||||
{
|
||||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||||
contents = elf_section_data (sec)->this_hdr.contents;
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||||
else
|
||||
{
|
||||
/* FIXME: How to better handle error condition? */
|
||||
if (!bfd_malloc_and_get_section (abfd, sec, &contents))
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||||
return FALSE;
|
||||
|
||||
/* Cache the section contents for elf_link_input_bfd. */
|
||||
elf_section_data (sec)->this_hdr.contents = contents;
|
||||
}
|
||||
}
|
||||
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||||
offset = rel->r_offset;
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||||
switch (r_type)
|
||||
{
|
||||
@@ -1397,7 +1381,8 @@ elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
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||||
const Elf_Internal_Rela *rel,
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||||
const Elf_Internal_Rela *relend,
|
||||
struct elf_link_hash_entry *h,
|
||||
unsigned long r_symndx)
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||||
unsigned long r_symndx,
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||||
bfd_boolean from_relocate_section)
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||||
{
|
||||
unsigned int from_type = *r_type;
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||||
unsigned int to_type = from_type;
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||||
@@ -1426,10 +1411,9 @@ elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
|
||||
to_type = R_386_TLS_IE_32;
|
||||
}
|
||||
|
||||
/* When we are called from elf_i386_relocate_section, CONTENTS
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||||
isn't NULL and there may be additional transitions based on
|
||||
TLS_TYPE. */
|
||||
if (contents != NULL)
|
||||
/* When we are called from elf_i386_relocate_section, there may
|
||||
be additional transitions based on TLS_TYPE. */
|
||||
if (from_relocate_section)
|
||||
{
|
||||
unsigned int new_to_type = to_type;
|
||||
|
||||
@@ -1473,7 +1457,7 @@ elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
|
||||
|
||||
/* Check if the transition can be performed. */
|
||||
if (check
|
||||
&& ! elf_i386_check_tls_transition (abfd, sec, contents,
|
||||
&& ! elf_i386_check_tls_transition (sec, contents,
|
||||
symtab_hdr, sym_hashes,
|
||||
from_type, rel, relend))
|
||||
{
|
||||
@@ -1515,6 +1499,255 @@ elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* With the local symbol, foo, we convert
|
||||
mov foo@GOT[(%reg1)], %reg2
|
||||
to
|
||||
lea foo[@GOTOFF(%reg1)], %reg2
|
||||
and convert
|
||||
call/jmp *foo@GOT[(%reg)]
|
||||
to
|
||||
nop call foo/jmp foo nop
|
||||
When PIC is false, convert
|
||||
test %reg1, foo@GOT[(%reg2)]
|
||||
to
|
||||
test $foo, %reg1
|
||||
and convert
|
||||
binop foo@GOT[(%reg1)], %reg2
|
||||
to
|
||||
binop $foo, %reg2
|
||||
where binop is one of adc, add, and, cmp, or, sbb, sub, xor
|
||||
instructions. */
|
||||
|
||||
static
|
||||
bfd_boolean
|
||||
elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
|
||||
bfd_byte *contents,
|
||||
Elf_Internal_Rela *irel,
|
||||
struct elf_link_hash_entry *h,
|
||||
bfd_boolean *converted,
|
||||
struct bfd_link_info *link_info)
|
||||
{
|
||||
struct elf_i386_link_hash_table *htab;
|
||||
unsigned int opcode;
|
||||
unsigned int modrm;
|
||||
bfd_boolean baseless;
|
||||
Elf_Internal_Sym *isym;
|
||||
unsigned int addend;
|
||||
unsigned int nop;
|
||||
bfd_vma nop_offset;
|
||||
bfd_boolean is_pic;
|
||||
bfd_boolean to_reloc_32;
|
||||
unsigned int r_type;
|
||||
unsigned int r_symndx;
|
||||
bfd_vma roff = irel->r_offset;
|
||||
|
||||
if (roff < 2)
|
||||
return TRUE;
|
||||
|
||||
/* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
|
||||
addend = bfd_get_32 (abfd, contents + roff);
|
||||
if (addend != 0)
|
||||
return TRUE;
|
||||
|
||||
htab = elf_i386_hash_table (link_info);
|
||||
is_pic = bfd_link_pic (link_info);
|
||||
|
||||
r_type = ELF32_R_TYPE (irel->r_info);
|
||||
r_symndx = ELF32_R_SYM (irel->r_info);
|
||||
|
||||
modrm = bfd_get_8 (abfd, contents + roff - 1);
|
||||
baseless = (modrm & 0xc7) == 0x5;
|
||||
|
||||
if (r_type == R_386_GOT32X && baseless && is_pic)
|
||||
{
|
||||
/* For PIC, disallow R_386_GOT32X without a base register
|
||||
since we don't know what the GOT base is. Allow
|
||||
R_386_GOT32 for existing object files. */
|
||||
const char *name;
|
||||
|
||||
if (h == NULL)
|
||||
{
|
||||
isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
|
||||
r_symndx);
|
||||
name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
|
||||
}
|
||||
else
|
||||
name = h->root.root.string;
|
||||
|
||||
(*_bfd_error_handler)
|
||||
(_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
|
||||
abfd, name);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
opcode = bfd_get_8 (abfd, contents + roff - 2);
|
||||
|
||||
/* Convert mov to lea since it has been done for a while. */
|
||||
if (opcode != 0x8b)
|
||||
{
|
||||
/* Only convert R_386_GOT32X relocation for call, jmp or
|
||||
one of adc, add, and, cmp, or, sbb, sub, test, xor
|
||||
instructions. */
|
||||
if (r_type != R_386_GOT32X)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Convert to R_386_32 if PIC is false or there is no base
|
||||
register. */
|
||||
to_reloc_32 = !is_pic || baseless;
|
||||
|
||||
/* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
|
||||
referred to by the reloc. */
|
||||
if (h == NULL)
|
||||
{
|
||||
if (opcode == 0x0ff)
|
||||
/* Convert "call/jmp *foo@GOT[(%reg)]". */
|
||||
goto convert_branch;
|
||||
else
|
||||
/* Convert "mov foo@GOT[(%reg1)], %reg2",
|
||||
"test %reg1, foo@GOT(%reg2)" and
|
||||
"binop foo@GOT[(%reg1)], %reg2". */
|
||||
goto convert_load;
|
||||
}
|
||||
|
||||
/* Undefined weak symbol is only bound locally in executable
|
||||
and its reference is resolved as 0. */
|
||||
if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
|
||||
elf_i386_hash_entry (h)))
|
||||
{
|
||||
if (opcode == 0xff)
|
||||
{
|
||||
/* No direct branch to 0 for PIC. */
|
||||
if (is_pic)
|
||||
return TRUE;
|
||||
else
|
||||
goto convert_branch;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* We can convert load of address 0 to R_386_32. */
|
||||
to_reloc_32 = TRUE;
|
||||
goto convert_load;
|
||||
}
|
||||
}
|
||||
|
||||
if (opcode == 0xff)
|
||||
{
|
||||
/* We have "call/jmp *foo@GOT[(%reg)]". */
|
||||
if ((h->root.type == bfd_link_hash_defined
|
||||
|| h->root.type == bfd_link_hash_defweak)
|
||||
&& SYMBOL_REFERENCES_LOCAL (link_info, h))
|
||||
{
|
||||
/* The function is locally defined. */
|
||||
convert_branch:
|
||||
/* Convert R_386_GOT32X to R_386_PC32. */
|
||||
if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
|
||||
{
|
||||
/* Convert to "nop call foo". ADDR_PREFIX_OPCODE
|
||||
is a nop prefix. */
|
||||
modrm = 0xe8;
|
||||
nop = link_info->call_nop_byte;
|
||||
if (link_info->call_nop_as_suffix)
|
||||
{
|
||||
nop_offset = roff + 3;
|
||||
irel->r_offset -= 1;
|
||||
}
|
||||
else
|
||||
nop_offset = roff - 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert to "jmp foo nop". */
|
||||
modrm = 0xe9;
|
||||
nop = NOP_OPCODE;
|
||||
nop_offset = roff + 3;
|
||||
irel->r_offset -= 1;
|
||||
}
|
||||
|
||||
bfd_put_8 (abfd, nop, contents + nop_offset);
|
||||
bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
|
||||
/* When converting to PC-relative relocation, we
|
||||
need to adjust addend by -4. */
|
||||
bfd_put_32 (abfd, -4, contents + irel->r_offset);
|
||||
irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
|
||||
|
||||
*converted = TRUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* We have "mov foo@GOT[(%re1g)], %reg2",
|
||||
"test %reg1, foo@GOT(%reg2)" and
|
||||
"binop foo@GOT[(%reg1)], %reg2".
|
||||
|
||||
Avoid optimizing _DYNAMIC since ld.so may use its
|
||||
link-time address. */
|
||||
if (h == htab->elf.hdynamic)
|
||||
return TRUE;
|
||||
|
||||
/* def_regular is set by an assignment in a linker script in
|
||||
bfd_elf_record_link_assignment. */
|
||||
if ((h->def_regular
|
||||
|| h->root.type == bfd_link_hash_defined
|
||||
|| h->root.type == bfd_link_hash_defweak)
|
||||
&& SYMBOL_REFERENCES_LOCAL (link_info, h))
|
||||
{
|
||||
convert_load:
|
||||
if (opcode == 0x8b)
|
||||
{
|
||||
if (to_reloc_32)
|
||||
{
|
||||
/* Convert "mov foo@GOT[(%reg1)], %reg2" to
|
||||
"mov $foo, %reg2" with R_386_32. */
|
||||
r_type = R_386_32;
|
||||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||||
opcode = 0xc7;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert "mov foo@GOT(%reg1), %reg2" to
|
||||
"lea foo@GOTOFF(%reg1), %reg2". */
|
||||
r_type = R_386_GOTOFF;
|
||||
opcode = 0x8d;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Only R_386_32 is supported. */
|
||||
if (!to_reloc_32)
|
||||
return TRUE;
|
||||
|
||||
if (opcode == 0x85)
|
||||
{
|
||||
/* Convert "test %reg1, foo@GOT(%reg2)" to
|
||||
"test $foo, %reg1". */
|
||||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||||
opcode = 0xf7;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert "binop foo@GOT(%reg1), %reg2" to
|
||||
"binop $foo, %reg2". */
|
||||
modrm = (0xc0
|
||||
| (modrm & 0x38) >> 3
|
||||
| (opcode & 0x3c));
|
||||
opcode = 0x81;
|
||||
}
|
||||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||||
r_type = R_386_32;
|
||||
}
|
||||
|
||||
bfd_put_8 (abfd, opcode, contents + roff - 2);
|
||||
irel->r_info = ELF32_R_INFO (r_symndx, r_type);
|
||||
|
||||
*converted = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Rename some of the generic section flags to better document how they
|
||||
are used here. */
|
||||
#define need_convert_load sec_flg0
|
||||
@@ -1536,6 +1769,7 @@ elf_i386_check_relocs (bfd *abfd,
|
||||
const Elf_Internal_Rela *rel;
|
||||
const Elf_Internal_Rela *rel_end;
|
||||
asection *sreloc;
|
||||
bfd_byte *contents;
|
||||
bfd_boolean use_plt_got;
|
||||
|
||||
if (bfd_link_relocatable (info))
|
||||
@@ -1550,6 +1784,15 @@ elf_i386_check_relocs (bfd *abfd,
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Get the section contents. */
|
||||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||||
contents = elf_section_data (sec)->this_hdr.contents;
|
||||
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
||||
{
|
||||
sec->check_relocs_failed = 1;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
|
||||
&& (get_elf_i386_backend_data (abfd)
|
||||
== &elf_i386_arch_bed));
|
||||
@@ -1649,10 +1892,10 @@ elf_i386_check_relocs (bfd *abfd,
|
||||
|= elf_gnu_symbol_ifunc;
|
||||
}
|
||||
|
||||
if (! elf_i386_tls_transition (info, abfd, sec, NULL,
|
||||
if (! elf_i386_tls_transition (info, abfd, sec, contents,
|
||||
symtab_hdr, sym_hashes,
|
||||
&r_type, GOT_UNKNOWN,
|
||||
rel, rel_end, h, r_symndx))
|
||||
rel, rel_end, h, r_symndx, FALSE))
|
||||
goto error_return;
|
||||
|
||||
switch (r_type)
|
||||
@@ -2029,9 +2272,22 @@ do_size:
|
||||
sec->need_convert_load = 1;
|
||||
}
|
||||
|
||||
if (elf_section_data (sec)->this_hdr.contents != contents)
|
||||
{
|
||||
if (!info->keep_memory)
|
||||
free (contents);
|
||||
else
|
||||
{
|
||||
/* Cache the section contents for elf_link_input_bfd. */
|
||||
elf_section_data (sec)->this_hdr.contents = contents;
|
||||
}
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
|
||||
error_return:
|
||||
if (elf_section_data (sec)->this_hdr.contents != contents)
|
||||
free (contents);
|
||||
sec->check_relocs_failed = 1;
|
||||
return FALSE;
|
||||
}
|
||||
@@ -2711,37 +2967,18 @@ elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* With the local symbol, foo, we convert
|
||||
mov foo@GOT[(%reg1)], %reg2
|
||||
to
|
||||
lea foo[@GOTOFF(%reg1)], %reg2
|
||||
and convert
|
||||
call/jmp *foo@GOT[(%reg)]
|
||||
to
|
||||
nop call foo/jmp foo nop
|
||||
When PIC is false, convert
|
||||
test %reg1, foo@GOT[(%reg2)]
|
||||
to
|
||||
test $foo, %reg1
|
||||
and convert
|
||||
binop foo@GOT[(%reg1)], %reg2
|
||||
to
|
||||
binop $foo, %reg2
|
||||
where binop is one of adc, add, and, cmp, or, sbb, sub, xor
|
||||
instructions. */
|
||||
/* Convert load via the GOT slot to load immediate. */
|
||||
|
||||
static bfd_boolean
|
||||
elf_i386_convert_load (bfd *abfd, asection *sec,
|
||||
struct bfd_link_info *link_info)
|
||||
{
|
||||
struct elf_i386_link_hash_table *htab;
|
||||
Elf_Internal_Shdr *symtab_hdr;
|
||||
Elf_Internal_Rela *internal_relocs;
|
||||
Elf_Internal_Rela *irel, *irelend;
|
||||
bfd_byte *contents;
|
||||
struct elf_i386_link_hash_table *htab;
|
||||
bfd_boolean changed_contents;
|
||||
bfd_boolean changed_relocs;
|
||||
bfd_boolean is_pic;
|
||||
bfd_boolean changed;
|
||||
bfd_signed_vma *local_got_refcounts;
|
||||
|
||||
/* Don't even try to convert non-ELF outputs. */
|
||||
@@ -2763,13 +3000,10 @@ elf_i386_convert_load (bfd *abfd, asection *sec,
|
||||
if (internal_relocs == NULL)
|
||||
return FALSE;
|
||||
|
||||
changed = FALSE;
|
||||
htab = elf_i386_hash_table (link_info);
|
||||
changed_contents = FALSE;
|
||||
changed_relocs = FALSE;
|
||||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||||
|
||||
is_pic = bfd_link_pic (link_info);
|
||||
|
||||
/* Get the section contents. */
|
||||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||||
contents = elf_section_data (sec)->this_hdr.contents;
|
||||
@@ -2783,269 +3017,48 @@ elf_i386_convert_load (bfd *abfd, asection *sec,
|
||||
for (irel = internal_relocs; irel < irelend; irel++)
|
||||
{
|
||||
unsigned int r_type = ELF32_R_TYPE (irel->r_info);
|
||||
unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
|
||||
unsigned int indx;
|
||||
unsigned int r_symndx;
|
||||
struct elf_link_hash_entry *h;
|
||||
unsigned int opcode;
|
||||
unsigned int modrm;
|
||||
bfd_vma roff;
|
||||
bfd_boolean baseless;
|
||||
Elf_Internal_Sym *isym;
|
||||
unsigned int addend;
|
||||
unsigned int nop;
|
||||
bfd_vma nop_offset;
|
||||
bfd_boolean to_reloc_32;
|
||||
bfd_boolean converted;
|
||||
|
||||
if (r_type != R_386_GOT32 && r_type != R_386_GOT32X)
|
||||
continue;
|
||||
|
||||
roff = irel->r_offset;
|
||||
if (roff < 2)
|
||||
continue;
|
||||
|
||||
/* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
|
||||
addend = bfd_get_32 (abfd, contents + roff);
|
||||
if (addend != 0)
|
||||
continue;
|
||||
|
||||
modrm = bfd_get_8 (abfd, contents + roff - 1);
|
||||
baseless = (modrm & 0xc7) == 0x5;
|
||||
|
||||
if (r_type == R_386_GOT32X && baseless && is_pic)
|
||||
{
|
||||
/* For PIC, disallow R_386_GOT32X without a base register
|
||||
since we don't know what the GOT base is. Allow
|
||||
R_386_GOT32 for existing object files. */
|
||||
const char *name;
|
||||
|
||||
if (r_symndx < symtab_hdr->sh_info)
|
||||
{
|
||||
isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
|
||||
r_symndx);
|
||||
name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
|
||||
}
|
||||
else
|
||||
{
|
||||
indx = r_symndx - symtab_hdr->sh_info;
|
||||
h = elf_sym_hashes (abfd)[indx];
|
||||
BFD_ASSERT (h != NULL);
|
||||
name = h->root.root.string;
|
||||
}
|
||||
|
||||
(*_bfd_error_handler)
|
||||
(_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
|
||||
abfd, name);
|
||||
goto error_return;
|
||||
}
|
||||
|
||||
opcode = bfd_get_8 (abfd, contents + roff - 2);
|
||||
|
||||
/* Convert mov to lea since it has been done for a while. */
|
||||
if (opcode != 0x8b)
|
||||
{
|
||||
/* Only convert R_386_GOT32X relocation for call, jmp or
|
||||
one of adc, add, and, cmp, or, sbb, sub, test, xor
|
||||
instructions. */
|
||||
if (r_type != R_386_GOT32X)
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Convert to R_386_32 if PIC is false or there is no base
|
||||
register. */
|
||||
to_reloc_32 = !is_pic || baseless;
|
||||
|
||||
/* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
|
||||
referred to by the reloc. */
|
||||
r_symndx = ELF32_R_SYM (irel->r_info);
|
||||
if (r_symndx < symtab_hdr->sh_info)
|
||||
{
|
||||
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
||||
abfd, r_symndx);
|
||||
|
||||
/* STT_GNU_IFUNC must keep GOT32 relocations. */
|
||||
if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
||||
continue;
|
||||
|
||||
h = NULL;
|
||||
if (opcode == 0x0ff)
|
||||
/* Convert "call/jmp *foo@GOT[(%reg)]". */
|
||||
goto convert_branch;
|
||||
else
|
||||
/* Convert "mov foo@GOT[(%reg1)], %reg2",
|
||||
"test %reg1, foo@GOT(%reg2)" and
|
||||
"binop foo@GOT[(%reg1)], %reg2". */
|
||||
goto convert_load;
|
||||
}
|
||||
|
||||
indx = r_symndx - symtab_hdr->sh_info;
|
||||
h = elf_sym_hashes (abfd)[indx];
|
||||
BFD_ASSERT (h != NULL);
|
||||
|
||||
while (h->root.type == bfd_link_hash_indirect
|
||||
|| h->root.type == bfd_link_hash_warning)
|
||||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||||
|
||||
/* STT_GNU_IFUNC must keep GOT32 relocations. */
|
||||
if (h->type == STT_GNU_IFUNC)
|
||||
continue;
|
||||
|
||||
/* Undefined weak symbol is only bound locally in executable
|
||||
and its reference is resolved as 0. */
|
||||
if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
|
||||
elf_i386_hash_entry (h)))
|
||||
{
|
||||
if (opcode == 0xff)
|
||||
{
|
||||
/* No direct branch to 0 for PIC. */
|
||||
if (is_pic)
|
||||
continue;
|
||||
else
|
||||
goto convert_branch;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* We can convert load of address 0 to R_386_32. */
|
||||
to_reloc_32 = TRUE;
|
||||
goto convert_load;
|
||||
}
|
||||
}
|
||||
|
||||
if (opcode == 0xff)
|
||||
{
|
||||
/* We have "call/jmp *foo@GOT[(%reg)]". */
|
||||
if ((h->root.type == bfd_link_hash_defined
|
||||
|| h->root.type == bfd_link_hash_defweak)
|
||||
&& SYMBOL_REFERENCES_LOCAL (link_info, h))
|
||||
{
|
||||
/* The function is locally defined. */
|
||||
convert_branch:
|
||||
/* Convert R_386_GOT32X to R_386_PC32. */
|
||||
if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
|
||||
{
|
||||
/* Convert to "nop call foo". ADDR_PREFIX_OPCODE
|
||||
is a nop prefix. */
|
||||
modrm = 0xe8;
|
||||
nop = link_info->call_nop_byte;
|
||||
if (link_info->call_nop_as_suffix)
|
||||
{
|
||||
nop_offset = roff + 3;
|
||||
irel->r_offset -= 1;
|
||||
}
|
||||
else
|
||||
nop_offset = roff - 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert to "jmp foo nop". */
|
||||
modrm = 0xe9;
|
||||
nop = NOP_OPCODE;
|
||||
nop_offset = roff + 3;
|
||||
irel->r_offset -= 1;
|
||||
}
|
||||
|
||||
bfd_put_8 (abfd, nop, contents + nop_offset);
|
||||
bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
|
||||
/* When converting to PC-relative relocation, we
|
||||
need to adjust addend by -4. */
|
||||
bfd_put_32 (abfd, -4, contents + irel->r_offset);
|
||||
irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
|
||||
|
||||
if (h)
|
||||
{
|
||||
if (h->got.refcount > 0)
|
||||
h->got.refcount -= 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (local_got_refcounts != NULL
|
||||
&& local_got_refcounts[r_symndx] > 0)
|
||||
local_got_refcounts[r_symndx] -= 1;
|
||||
}
|
||||
|
||||
changed_contents = TRUE;
|
||||
changed_relocs = TRUE;
|
||||
}
|
||||
}
|
||||
h = elf_i386_get_local_sym_hash (htab, sec->owner,
|
||||
(const Elf_Internal_Rela *) irel,
|
||||
FALSE);
|
||||
else
|
||||
{
|
||||
/* We have "mov foo@GOT[(%re1g)], %reg2",
|
||||
"test %reg1, foo@GOT(%reg2)" and
|
||||
"binop foo@GOT[(%reg1)], %reg2".
|
||||
h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
|
||||
while (h->root.type == bfd_link_hash_indirect
|
||||
|| h->root.type == bfd_link_hash_warning)
|
||||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||||
}
|
||||
|
||||
Avoid optimizing _DYNAMIC since ld.so may use its
|
||||
link-time address. */
|
||||
if (h == htab->elf.hdynamic)
|
||||
continue;
|
||||
/* STT_GNU_IFUNC must keep GOT32 relocations. */
|
||||
if (h != NULL && h->type == STT_GNU_IFUNC)
|
||||
continue;
|
||||
|
||||
/* def_regular is set by an assignment in a linker script in
|
||||
bfd_elf_record_link_assignment. */
|
||||
if ((h->def_regular
|
||||
|| h->root.type == bfd_link_hash_defined
|
||||
|| h->root.type == bfd_link_hash_defweak)
|
||||
&& SYMBOL_REFERENCES_LOCAL (link_info, h))
|
||||
converted = FALSE;
|
||||
if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
|
||||
irel, h, &converted, link_info))
|
||||
goto error_return;
|
||||
|
||||
if (converted)
|
||||
{
|
||||
changed = converted;
|
||||
if (h)
|
||||
{
|
||||
convert_load:
|
||||
if (opcode == 0x8b)
|
||||
{
|
||||
if (to_reloc_32)
|
||||
{
|
||||
/* Convert "mov foo@GOT[(%reg1)], %reg2" to
|
||||
"mov $foo, %reg2" with R_386_32. */
|
||||
r_type = R_386_32;
|
||||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||||
opcode = 0xc7;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert "mov foo@GOT(%reg1), %reg2" to
|
||||
"lea foo@GOTOFF(%reg1), %reg2". */
|
||||
r_type = R_386_GOTOFF;
|
||||
opcode = 0x8d;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Only R_386_32 is supported. */
|
||||
if (!to_reloc_32)
|
||||
continue;
|
||||
|
||||
if (opcode == 0x85)
|
||||
{
|
||||
/* Convert "test %reg1, foo@GOT(%reg2)" to
|
||||
"test $foo, %reg1". */
|
||||
modrm = 0xc0 | (modrm & 0x38) >> 3;
|
||||
opcode = 0xf7;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Convert "binop foo@GOT(%reg1), %reg2" to
|
||||
"binop $foo, %reg2". */
|
||||
modrm = (0xc0
|
||||
| (modrm & 0x38) >> 3
|
||||
| (opcode & 0x3c));
|
||||
opcode = 0x81;
|
||||
}
|
||||
bfd_put_8 (abfd, modrm, contents + roff - 1);
|
||||
r_type = R_386_32;
|
||||
}
|
||||
|
||||
bfd_put_8 (abfd, opcode, contents + roff - 2);
|
||||
irel->r_info = ELF32_R_INFO (r_symndx, r_type);
|
||||
|
||||
if (h)
|
||||
{
|
||||
if (h->got.refcount > 0)
|
||||
h->got.refcount -= 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (local_got_refcounts != NULL
|
||||
&& local_got_refcounts[r_symndx] > 0)
|
||||
local_got_refcounts[r_symndx] -= 1;
|
||||
}
|
||||
|
||||
changed_contents = TRUE;
|
||||
changed_relocs = TRUE;
|
||||
if (h->got.refcount > 0)
|
||||
h->got.refcount -= 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (local_got_refcounts != NULL
|
||||
&& local_got_refcounts[r_symndx] > 0)
|
||||
local_got_refcounts[r_symndx] -= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -3053,7 +3066,7 @@ convert_load:
|
||||
if (contents != NULL
|
||||
&& elf_section_data (sec)->this_hdr.contents != contents)
|
||||
{
|
||||
if (!changed_contents && !link_info->keep_memory)
|
||||
if (!changed && !link_info->keep_memory)
|
||||
free (contents);
|
||||
else
|
||||
{
|
||||
@@ -3064,7 +3077,7 @@ convert_load:
|
||||
|
||||
if (elf_section_data (sec)->relocs != internal_relocs)
|
||||
{
|
||||
if (!changed_relocs)
|
||||
if (!changed)
|
||||
free (internal_relocs);
|
||||
else
|
||||
elf_section_data (sec)->relocs = internal_relocs;
|
||||
@@ -4356,7 +4369,7 @@ r_386_got32:
|
||||
input_section, contents,
|
||||
symtab_hdr, sym_hashes,
|
||||
&r_type, tls_type, rel,
|
||||
relend, h, r_symndx))
|
||||
relend, h, r_symndx, TRUE))
|
||||
return FALSE;
|
||||
|
||||
if (r_type == R_386_TLS_LE_32)
|
||||
@@ -4817,7 +4830,7 @@ r_386_got32:
|
||||
input_section, contents,
|
||||
symtab_hdr, sym_hashes,
|
||||
&r_type, GOT_UNKNOWN, rel,
|
||||
relend, h, r_symndx))
|
||||
relend, h, r_symndx, TRUE))
|
||||
return FALSE;
|
||||
|
||||
if (r_type != R_386_TLS_LDM)
|
||||
@@ -5818,6 +5831,7 @@ elf_i386_add_symbol_hook (bfd * abfd,
|
||||
#define elf_backend_got_header_size 12
|
||||
#define elf_backend_plt_alignment 4
|
||||
#define elf_backend_extern_protected_data 1
|
||||
#define elf_backend_caches_rawsize 1
|
||||
|
||||
/* Support RELA for objdump of prelink objects. */
|
||||
#define elf_info_to_howto elf_i386_info_to_howto_rel
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user