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Supprt TLS x32 IE->LE transition.

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bfd/

2011-03-03  H.J. Lu  <hongjiu.lu@intel.com>

	* elf64-x86-64.c (elf_x86_64_check_tls_transition): Supprt TLS
	x32 IE->LE transition.
	(elf_x86_64_relocate_section): Likewise.

ld/testsuite/

2011-03-03  H.J. Lu  <hongjiu.lu@intel.com>

	* ld-x86-64/tlsie4.dd: New.
	* ld-x86-64/tlsie4.s: Likewise.

	* ld-x86-64/x86-64.exp (x86_64tests): Add tlsie4.
This commit is contained in:
H.J. Lu 2011-03-03 22:11:33 +00:00
parent 2e3fd7679d
commit 4a4c5f250b
6 changed files with 80 additions and 8 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2011-03-03 H.J. Lu <hongjiu.lu@intel.com>
* elf64-x86-64.c (elf_x86_64_check_tls_transition): Supprt TLS
x32 IE->LE transition.
(elf_x86_64_relocate_section): Likewise.
2011-03-02 Bernd Schmidt <bernds@codesourcery.com>
* elflink.c (is_reloc_section): Remove function.

38
bfd/elf64-x86-64.c
View File

@ -913,16 +913,29 @@ elf_x86_64_check_tls_transition (bfd *abfd,
case R_X86_64_GOTTPOFF:
/* Check transition from IE access model:
movq foo@gottpoff(%rip), %reg
addq foo@gottpoff(%rip), %reg
mov foo@gottpoff(%rip), %reg
add foo@gottpoff(%rip), %reg
*/
if (offset < 3 || (offset + 4) > sec->size)
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 3);
if (val != 0x48 && val != 0x4c)
return FALSE;
/* Check REX prefix first. */
if (offset >= 3 && (offset + 4) <= sec->size)
{
val = bfd_get_8 (abfd, contents + offset - 3);
if (val != 0x48 && val != 0x4c)
{
/* X32 may have 0x44 REX prefix or no REX prefix. */
if (ABI_64_P (abfd))
return FALSE;
}
}
else
{
/* X32 may not have any REX prefix. */
if (ABI_64_P (abfd))
return FALSE;
if (offset < 2 || (offset + 3) > sec->size)
return FALSE;
}
val = bfd_get_8 (abfd, contents + offset - 2);
if (val != 0x8b && val != 0x03)
@ -3505,6 +3518,9 @@ elf_x86_64_relocate_section (bfd *output_bfd,
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x49,
contents + roff - 3);
else if (!ABI_64_P (output_bfd) && val == 0x44)
bfd_put_8 (output_bfd, 0x41,
contents + roff - 3);
bfd_put_8 (output_bfd, 0xc7,
contents + roff - 2);
bfd_put_8 (output_bfd, 0xc0 | reg,
@ -3517,6 +3533,9 @@ elf_x86_64_relocate_section (bfd *output_bfd,
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x49,
contents + roff - 3);
else if (!ABI_64_P (output_bfd) && val == 0x44)
bfd_put_8 (output_bfd, 0x41,
contents + roff - 3);
bfd_put_8 (output_bfd, 0x81,
contents + roff - 2);
bfd_put_8 (output_bfd, 0xc0 | reg,
@ -3528,6 +3547,9 @@ elf_x86_64_relocate_section (bfd *output_bfd,
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x4d,
contents + roff - 3);
else if (!ABI_64_P (output_bfd) && val == 0x44)
bfd_put_8 (output_bfd, 0x45,
contents + roff - 3);
bfd_put_8 (output_bfd, 0x8d,
contents + roff - 2);
bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),

7
ld/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2011-03-03 H.J. Lu <hongjiu.lu@intel.com>
* ld-x86-64/tlsie4.dd: New.
* ld-x86-64/tlsie4.s: Likewise.
* ld-x86-64/x86-64.exp (x86_64tests): Add tlsie4.
2011-02-25 H.J. Lu <hongjiu.lu@intel.com>
PR ld/12516

18
ld/testsuite/ld-x86-64/tlsie4.dd Normal file
View File

@ -0,0 +1,18 @@
#source: tlsie4.s
#as: --x32
#ld: -melf32_x86_64 tmpdir/tlsie4
#objdump: -drw
#target: x86_64-*-linux*
.*: +file format .*
Disassembly of section .text:
[a-f0-9]+ <_start>:
[ ]*[a-f0-9]+: c7 c0 fc ff ff ff mov \$0xfffffffc,%eax
[ ]*[a-f0-9]+: 8d 80 fc ff ff ff lea -0x4\(%rax\),%eax
[ ]*[a-f0-9]+: 41 c7 c0 fc ff ff ff mov \$0xfffffffc,%r8d
[ ]*[a-f0-9]+: 45 8d 80 fc ff ff ff lea -0x4\(%r8\),%r8d
[ ]*[a-f0-9]+: 41 c7 c4 fc ff ff ff mov \$0xfffffffc,%r12d
[ ]*[a-f0-9]+: 41 81 c4 fc ff ff ff add \$0xfffffffc,%r12d
#pass

16
ld/testsuite/ld-x86-64/tlsie4.s Normal file
View File

@ -0,0 +1,16 @@
.text
.globl _start
_start:
mov foo@GOTTPOFF(%rip), %eax
add foo@GOTTPOFF(%rip), %eax
mov foo@GOTTPOFF(%rip), %r8d
add foo@GOTTPOFF(%rip), %r8d
mov foo@GOTTPOFF(%rip), %r12d
add foo@GOTTPOFF(%rip), %r12d
.globl foo
.section .tdata,"awT",@progbits
.align 4
.type foo, @object
.size foo, 4
foo:
.long 100

3
ld/testsuite/ld-x86-64/x86-64.exp
View File

@ -87,6 +87,9 @@ set x86_64tests {
{"Split by file with 'l' flag on section." "-split-by-file -r"
"--64" {split-by-file1.s split-by-file2.s}
{{readelf -SW split-by-file.rd}} "split-by-file.o"}
{"TLS X32 IE->LE transition" "-melf32_x86_64"
"--x32" {tlsie4.s}
{{objdump -dwr tlsie4.dd}} "tlsie4"}
}
run_ld_link_tests $x86_64tests