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2007-08-14  H.J. Lu  <hongjiu.lu@intel.com>

	PR ld/4918
	* elf32-i386.c (elf_i386_relocate_section): Allow R_386_PC32
	on ___tls_get_addr for GD->LE/LD->LE transitions when not
	building shared library.

	* elf64-x86-64.c (elf64_x86_64_relocate_section): Allow
	R_X86_64_PC32 on __tls_get_addr for GD->LE/LD->LE transitions
	when not building shared library.

ld/testsuite/

2007-08-14  H.J. Lu  <hongjiu.lu@intel.com>

	PR ld/4918
	* ld-i386/i386.exp (i386tests): Add tlsgd1 and tlsld1 tests.
	* ld-x86-64/x86-64.exp (x86_64tests): Likewise.

	* ld-i386/tlsgd1.dd: New file.
	* ld-i386/tlsgd1.s: Likewise.
	* ld-i386/tlsld1.dd: Likewise.
	* ld-i386/tlsld1.s: Likewise.
	* ld-x86-64/tlsgd1.dd: Likewise.
	* ld-x86-64/tlsgd1.s: Likewise.
	* ld-x86-64/tlsld1.dd: Likewise.
	* ld-x86-64/tlsld1.s: Likewise.
This commit is contained in:
H.J. Lu
2007-08-14 19:48:21 +00:00
parent 6d307763fb
commit a3fadc9a17
14 changed files with 198 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
2007-08-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/4918
* elf32-i386.c (elf_i386_relocate_section): Allow R_386_PC32
on ___tls_get_addr for GD->LE/LD->LE transitions when not
building shared library.
* elf64-x86-64.c (elf64_x86_64_relocate_section): Allow
R_X86_64_PC32 on __tls_get_addr for GD->LE/LD->LE transitions
when not building shared library.
2007-08-14 Jan Kratochvil <jan.kratochvil@redhat.com>
* elfcode.h (NAME(_bfd_elf,bfd_from_remote_memory)): LOADBASE is now

29
bfd/elf32-i386.c
View File

@ -2652,6 +2652,8 @@ elf_i386_relocate_section (bfd *output_bfd,
{
unsigned int val, type;
bfd_vma roff;
unsigned long tls_r_symndx;
struct elf_link_hash_entry *tls_h;
/* GD->LE transition. */
BFD_ASSERT (rel->r_offset >= 2);
@ -2662,7 +2664,16 @@ elf_i386_relocate_section (bfd *output_bfd,
contents + rel->r_offset + 4)
== 0xe8);
BFD_ASSERT (rel + 1 < relend);
BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
tls_r_symndx = ELF32_R_SYM (rel[1].r_info);
BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info);
tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info];
BFD_ASSERT (tls_h != NULL
&& tls_h->root.root.string != NULL
&& strcmp (tls_h->root.root.string,
"___tls_get_addr") == 0);
BFD_ASSERT ((! info->shared
&& ELF32_R_TYPE (rel[1].r_info) == R_386_PC32)
|| ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
roff = rel->r_offset + 5;
val = bfd_get_8 (input_bfd,
contents + rel->r_offset - 1);
@ -2707,7 +2718,7 @@ elf_i386_relocate_section (bfd *output_bfd,
}
bfd_put_32 (output_bfd, tpoff (info, relocation),
contents + roff);
/* Skip R_386_PLT32. */
/* Skip R_386_PC32/R_386_PLT32. */
rel++;
continue;
}
@ -3191,6 +3202,8 @@ elf_i386_relocate_section (bfd *output_bfd,
if (! info->shared)
{
unsigned int val;
unsigned long tls_r_symndx;
struct elf_link_hash_entry *tls_h;
/* LD->LE transition:
Ensure it is:
@ -3206,10 +3219,18 @@ elf_i386_relocate_section (bfd *output_bfd,
BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
== 0xe8);
BFD_ASSERT (rel + 1 < relend);
BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
tls_r_symndx = ELF32_R_SYM (rel[1].r_info);
BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info);
tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info];
BFD_ASSERT (tls_h != NULL
&& tls_h->root.root.string != NULL
&& strcmp (tls_h->root.root.string,
"___tls_get_addr") == 0);
BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
|| ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
memcpy (contents + rel->r_offset - 2,
"\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
/* Skip R_386_PLT32. */
/* Skip R_386_PC32/R_386_PLT32. */
rel++;
continue;
}

34
bfd/elf64-x86-64.c
View File

@ -2527,10 +2527,12 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
unsigned int i;
static unsigned char tlsgd[8]
= { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
unsigned long tls_r_symndx;
struct elf_link_hash_entry *tls_h;
/* GD->LE transition.
.byte 0x66; leaq foo@tlsgd(%rip), %rdi
.word 0x6666; rex64; call __tls_get_addr@plt
.word 0x6666; rex64; call __tls_get_addr
Change it into:
movq %fs:0, %rax
leaq foo@tpoff(%rax), %rax */
@ -2545,13 +2547,22 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
contents + rel->r_offset + 4 + i)
== tlsgd[i+4]);
BFD_ASSERT (rel + 1 < relend);
BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
tls_r_symndx = ELF64_R_SYM (rel[1].r_info);
BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info);
tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info];
BFD_ASSERT (tls_h != NULL
&& tls_h->root.root.string != NULL
&& strcmp (tls_h->root.root.string,
"__tls_get_addr") == 0);
BFD_ASSERT ((! info->shared
&& ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32)
|| ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
memcpy (contents + rel->r_offset - 4,
"\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
16);
bfd_put_32 (output_bfd, tpoff (info, relocation),
contents + rel->r_offset + 8);
/* Skip R_X86_64_PLT32. */
/* Skip R_X86_64_PC32/R_X86_64_PLT32. */
rel++;
continue;
}
@ -2919,9 +2930,12 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
case R_X86_64_TLSLD:
if (! info->shared)
{
unsigned long tls_r_symndx;
struct elf_link_hash_entry *tls_h;
/* LD->LE transition:
Ensure it is:
leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
We change it into:
.word 0x6666; .byte 0x66; movl %fs:0, %rax. */
BFD_ASSERT (rel->r_offset >= 3);
@ -2935,10 +2949,18 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
== 0xe8);
BFD_ASSERT (rel + 1 < relend);
BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
tls_r_symndx = ELF64_R_SYM (rel[1].r_info);
BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info);
tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info];
BFD_ASSERT (tls_h != NULL
&& tls_h->root.root.string != NULL
&& strcmp (tls_h->root.root.string,
"__tls_get_addr") == 0);
BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32
|| ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
memcpy (contents + rel->r_offset - 3,
"\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
/* Skip R_X86_64_PLT32. */
/* Skip R_X86_64_PC32/R_X86_64_PLT32. */
rel++;
continue;
}

15
ld/testsuite/ChangeLog
View File

@ -1,3 +1,18 @@
2007-08-14 H.J. Lu <hongjiu.lu@intel.com>
PR ld/4918
* ld-i386/i386.exp (i386tests): Add tlsgd1 and tlsld1 tests.
* ld-x86-64/x86-64.exp (x86_64tests): Likewise.
* ld-i386/tlsgd1.dd: New file.
* ld-i386/tlsgd1.s: Likewise.
* ld-i386/tlsld1.dd: Likewise.
* ld-i386/tlsld1.s: Likewise.
* ld-x86-64/tlsgd1.dd: Likewise.
* ld-x86-64/tlsgd1.s: Likewise.
* ld-x86-64/tlsld1.dd: Likewise.
* ld-x86-64/tlsld1.s: Likewise.
2007-08-13 Richard Sandiford <richard@codesourcery.com>
* ld-mips-elf/vxworks-forced-local-1.d,

6
ld/testsuite/ld-i386/i386.exp
View File

@ -109,6 +109,12 @@ set i386tests {
{emit-relocs.s} {{readelf --relocs emit-relocs.d}} "emit-relocs.so"}
{"-z combreloc relocation sections" "-shared -melf_i386 -z combreloc"
"--32" {combreloc.s} {{readelf -r combreloc.d}} "combreloc.so"}
{"TLS GD->LE transition" "-melf_i386"
"--32" {tlsgd1.s}
{{objdump -dwr tlsgd1.dd}} "tlsgd1"}
{"TLS LD->LE transition" "-melf_i386"
"--32" {tlsld1.s}
{{objdump -dwr tlsld1.dd}} "tlsld1"}
}
run_ld_link_tests $i386tests

14
ld/testsuite/ld-i386/tlsgd1.dd Normal file
View File

@ -0,0 +1,14 @@
#source: tlsgd1.s
#as: --32
#ld: -melf_i386 tmpdir/tlsgd1
#objdump: -drw
#target: i?86-*-linux*
.*: +file format .*
Disassembly of section .text:
[a-f0-9]+ <_start>:
[ ]*[a-f0-9]+: 65 a1 00 00 00 00 mov %gs:0x0,%eax
[ ]*[a-f0-9]+: 81 e8 04 00 00 00 sub \$0x4,%eax
#pass

12
ld/testsuite/ld-i386/tlsgd1.s Normal file
View File

@ -0,0 +1,12 @@
.text
.globl _start
_start:
leal foo@TLSGD(,%ebx,1), %eax
call ___tls_get_addr
.globl foo
.section .tdata,"awT",@progbits
.align 4
.type foo, @object
.size foo, 4
foo:
.long 100

15
ld/testsuite/ld-i386/tlsld1.dd Normal file
View File

@ -0,0 +1,15 @@
#source: tlsld1.s
#as: --32
#ld: -melf_i386 tmpdir/tlsld1
#objdump: -drw
#target: i?86-*-linux*
.*: +file format .*
Disassembly of section .text:
[a-f0-9]+ <_start>:
[ ]*[a-f0-9]+: 65 a1 00 00 00 00 mov %gs:0x0,%eax
[ ]*[a-f0-9]+: 90 nop
[ ]*[a-f0-9]+: 8d 74 26 00 lea 0x0\(%esi\),%esi
#pass

12
ld/testsuite/ld-i386/tlsld1.s Normal file
View File

@ -0,0 +1,12 @@
.text
.globl _start
_start:
leal foo@TLSLDM(%ebx), %eax
call ___tls_get_addr
.globl foo
.section .tdata,"awT",@progbits
.align 4
.type foo, @object
.size foo, 4
foo:
.long 100

14
ld/testsuite/ld-x86-64/tlsgd1.dd Normal file
View File

@ -0,0 +1,14 @@
#source: tlsgd1.s
#as: --64
#ld: -melf_x86_64 tmpdir/tlsgd1
#objdump: -drw
#target: x86_64-*-linux*
.*: +file format .*
Disassembly of section .text:
[a-f0-9]+ <_start>:
[ ]*[a-f0-9]+: 64 48 8b 04 25 00 00 00 00 mov %fs:0x0,%rax
[ ]*[a-f0-9]+: 48 8d 80 fc ff ff ff lea -0x4\(%rax\),%rax
#pass

15
ld/testsuite/ld-x86-64/tlsgd1.s Normal file
View File

@ -0,0 +1,15 @@
.text
.globl _start
_start:
.byte 0x66
leaq foo@TLSGD(%rip), %rdi
.word 0x6666
rex64
call __tls_get_addr
.globl foo
.section .tdata,"awT",@progbits
.align 4
.type foo, @object
.size foo, 4
foo:
.long 100

13
ld/testsuite/ld-x86-64/tlsld1.dd Normal file
View File

@ -0,0 +1,13 @@
#source: tlsld1.s
#as: --64
#ld: -melf_x86_64 tmpdir/tlsld1
#objdump: -drw
#target: x86_64-*-linux*
.*: +file format .*
Disassembly of section .text:
[a-f0-9]+ <_start>:
[ ]*[a-f0-9]+: 66 66 66 64 48 8b 04 25 00 00 00 00 mov %fs:0x0,%rax
#pass

12
ld/testsuite/ld-x86-64/tlsld1.s Normal file
View File

@ -0,0 +1,12 @@
.text
.globl _start
_start:
leaq foo@TLSLD(%rip), %rdi
call __tls_get_addr
.globl foo
.section .tdata,"awT",@progbits
.align 4
.type foo, @object
.size foo, 4
foo:
.long 100

6
ld/testsuite/ld-x86-64/x86-64.exp
View File

@ -66,6 +66,12 @@ set x86_64tests {
{"TLS in debug sections" "-melf_x86_64"
"--64" {tlsg.s}
{{objdump -sj.debug_foobar tlsg.sd}} "tlsg"}
{"TLS GD->LE transition" "-melf_x86_64"
"--64" {tlsgd1.s}
{{objdump -dwr tlsgd1.dd}} "tlsgd1"}
{"TLS LD->LE transition" "-melf_x86_64"
"--64" {tlsld1.s}
{{objdump -dwr tlsld1.dd}} "tlsld1"}
}
run_ld_link_tests $x86_64tests