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author | H.J. Lu <hjl.tools@gmail.com> | 2018-02-05 08:38:16 -0800 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2018-02-05 08:38:16 -0800 |
commit | cd04836359da82ae1dc67e5a05565536f4427b51 (patch) | |
tree | fc72f6593a58e26174caadbfe9515204901fb318 /ld/testsuite/ld-x86-64/load1a.d | |
parent | b8df6ca79e69678a07d3216b9b2b552fce27cda8 (diff) | |
download | gdb-cd04836359da82ae1dc67e5a05565536f4427b51.zip gdb-cd04836359da82ae1dc67e5a05565536f4427b51.tar.gz gdb-cd04836359da82ae1dc67e5a05565536f4427b51.tar.bz2 |
x86: Remove the unused _GLOBAL_OFFSET_TABLE_
Since _GLOBAL_OFFSET_TABLE_ may be referenced implicitly on x86,
checking ref_regular_nonweak leaves the unused _GLOBAL_OFFSET_TABLE_
in output. This patch checks explicit GOT references instead.
ld-i386/discarded1.s and ld-x86-64/discarded1.s are updated to avoid
linker optimization which removes GOT references.
bfd/
PR ld/22782
* elf32-i386.c (elf_i386_check_relocs): Set got_referenced if
_GLOBAL_OFFSET_TABLE_ is referenced or GOT is needed to resolve
undefined weak symbol to 0.
* elf64-x86-64.c (elf_x86_64_check_relocs): Set got_referenced
if _GLOBAL_OFFSET_TABLE_ is referenced.
* elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Check
got_referenced instead of ref_regular_nonweak. Remove the
unused _GLOBAL_OFFSET_TABLE_ from symbol table.
* elfxx-x86.h (elf_x86_link_hash_table): Add got_referenced.
ld/
PR ld/22782
* testsuite/ld-i386/discarded1.s: Replace mov with div.
* testsuite/ld-x86-64/discarded1.s: Likewise.
* testsuite/ld-i386/i386.exp: Run pr22782.
* testsuite/ld-i386/load1-nacl.d: Updated for removing
_GLOBAL_OFFSET_TABLE_ from output.
* testsuite/ld-i386/load1.d: Likewise.
* testsuite/ld-x86-64/load1a-nacl.d: Likewise.
* testsuite/ld-x86-64/load1a.d: Likewise.
* testsuite/ld-x86-64/load1b-nacl.d: Likewise.
* testsuite/ld-x86-64/load1b.d: Likewise.
* testsuite/ld-i386/pr22782.d: New file.
* testsuite/ld-i386/pr22782.s: Likewise.
* testsuite/ld-x86-64/pr22782.s: Likewise.
* testsuite/ld-x86-64/pr22782a.d: Likewise.
* testsuite/ld-x86-64/pr22782b.d: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr22782a and pr22782b.
Diffstat (limited to 'ld/testsuite/ld-x86-64/load1a.d')
-rw-r--r-- | ld/testsuite/ld-x86-64/load1a.d | 76 |
1 files changed, 38 insertions, 38 deletions
diff --git a/ld/testsuite/ld-x86-64/load1a.d b/ld/testsuite/ld-x86-64/load1a.d index 0eb4880..bbbd204 100644 --- a/ld/testsuite/ld-x86-64/load1a.d +++ b/ld/testsuite/ld-x86-64/load1a.d @@ -8,48 +8,48 @@ SYMBOL TABLE: #... -0+6001b8 l O .data 0+1 bar +0+60019e l O .data 0+1 bar #... -0+6001b9 g O .data 0+1 foo +0+60019f g O .data 0+1 foo #... Disassembly of section .text: 0+4000b0 <_start>: -[ ]*[a-f0-9]+: 81 d0 b8 01 60 00 adc \$0x6001b8,%eax -[ ]*[a-f0-9]+: 81 c3 b8 01 60 00 add \$0x6001b8,%ebx -[ ]*[a-f0-9]+: 81 e1 b8 01 60 00 and \$0x6001b8,%ecx -[ ]*[a-f0-9]+: 81 fa b8 01 60 00 cmp \$0x6001b8,%edx -[ ]*[a-f0-9]+: 81 ce b8 01 60 00 or \$0x6001b8,%esi -[ ]*[a-f0-9]+: 81 df b8 01 60 00 sbb \$0x6001b8,%edi -[ ]*[a-f0-9]+: 81 ed b8 01 60 00 sub \$0x6001b8,%ebp -[ ]*[a-f0-9]+: 41 81 f0 b8 01 60 00 xor \$0x6001b8,%r8d -[ ]*[a-f0-9]+: 41 f7 c7 b8 01 60 00 test \$0x6001b8,%r15d -[ ]*[a-f0-9]+: 48 81 d0 b8 01 60 00 adc \$0x6001b8,%rax -[ ]*[a-f0-9]+: 48 81 c3 b8 01 60 00 add \$0x6001b8,%rbx -[ ]*[a-f0-9]+: 48 81 e1 b8 01 60 00 and \$0x6001b8,%rcx -[ ]*[a-f0-9]+: 48 81 fa b8 01 60 00 cmp \$0x6001b8,%rdx -[ ]*[a-f0-9]+: 48 81 cf b8 01 60 00 or \$0x6001b8,%rdi -[ ]*[a-f0-9]+: 48 81 de b8 01 60 00 sbb \$0x6001b8,%rsi -[ ]*[a-f0-9]+: 48 81 ed b8 01 60 00 sub \$0x6001b8,%rbp -[ ]*[a-f0-9]+: 49 81 f0 b8 01 60 00 xor \$0x6001b8,%r8 -[ ]*[a-f0-9]+: 49 f7 c7 b8 01 60 00 test \$0x6001b8,%r15 -[ ]*[a-f0-9]+: 81 d0 b9 01 60 00 adc \$0x6001b9,%eax -[ ]*[a-f0-9]+: 81 c3 b9 01 60 00 add \$0x6001b9,%ebx -[ ]*[a-f0-9]+: 81 e1 b9 01 60 00 and \$0x6001b9,%ecx -[ ]*[a-f0-9]+: 81 fa b9 01 60 00 cmp \$0x6001b9,%edx -[ ]*[a-f0-9]+: 81 ce b9 01 60 00 or \$0x6001b9,%esi -[ ]*[a-f0-9]+: 81 df b9 01 60 00 sbb \$0x6001b9,%edi -[ ]*[a-f0-9]+: 81 ed b9 01 60 00 sub \$0x6001b9,%ebp -[ ]*[a-f0-9]+: 41 81 f0 b9 01 60 00 xor \$0x6001b9,%r8d -[ ]*[a-f0-9]+: 41 f7 c7 b9 01 60 00 test \$0x6001b9,%r15d -[ ]*[a-f0-9]+: 48 81 d0 b9 01 60 00 adc \$0x6001b9,%rax -[ ]*[a-f0-9]+: 48 81 c3 b9 01 60 00 add \$0x6001b9,%rbx -[ ]*[a-f0-9]+: 48 81 e1 b9 01 60 00 and \$0x6001b9,%rcx -[ ]*[a-f0-9]+: 48 81 fa b9 01 60 00 cmp \$0x6001b9,%rdx -[ ]*[a-f0-9]+: 48 81 cf b9 01 60 00 or \$0x6001b9,%rdi -[ ]*[a-f0-9]+: 48 81 de b9 01 60 00 sbb \$0x6001b9,%rsi -[ ]*[a-f0-9]+: 48 81 ed b9 01 60 00 sub \$0x6001b9,%rbp -[ ]*[a-f0-9]+: 49 81 f0 b9 01 60 00 xor \$0x6001b9,%r8 -[ ]*[a-f0-9]+: 49 f7 c7 b9 01 60 00 test \$0x6001b9,%r15 +[ ]*[a-f0-9]+: 81 d0 9e 01 60 00 adc \$0x60019e,%eax +[ ]*[a-f0-9]+: 81 c3 9e 01 60 00 add \$0x60019e,%ebx +[ ]*[a-f0-9]+: 81 e1 9e 01 60 00 and \$0x60019e,%ecx +[ ]*[a-f0-9]+: 81 fa 9e 01 60 00 cmp \$0x60019e,%edx +[ ]*[a-f0-9]+: 81 ce 9e 01 60 00 or \$0x60019e,%esi +[ ]*[a-f0-9]+: 81 df 9e 01 60 00 sbb \$0x60019e,%edi +[ ]*[a-f0-9]+: 81 ed 9e 01 60 00 sub \$0x60019e,%ebp +[ ]*[a-f0-9]+: 41 81 f0 9e 01 60 00 xor \$0x60019e,%r8d +[ ]*[a-f0-9]+: 41 f7 c7 9e 01 60 00 test \$0x60019e,%r15d +[ ]*[a-f0-9]+: 48 81 d0 9e 01 60 00 adc \$0x60019e,%rax +[ ]*[a-f0-9]+: 48 81 c3 9e 01 60 00 add \$0x60019e,%rbx +[ ]*[a-f0-9]+: 48 81 e1 9e 01 60 00 and \$0x60019e,%rcx +[ ]*[a-f0-9]+: 48 81 fa 9e 01 60 00 cmp \$0x60019e,%rdx +[ ]*[a-f0-9]+: 48 81 cf 9e 01 60 00 or \$0x60019e,%rdi +[ ]*[a-f0-9]+: 48 81 de 9e 01 60 00 sbb \$0x60019e,%rsi +[ ]*[a-f0-9]+: 48 81 ed 9e 01 60 00 sub \$0x60019e,%rbp +[ ]*[a-f0-9]+: 49 81 f0 9e 01 60 00 xor \$0x60019e,%r8 +[ ]*[a-f0-9]+: 49 f7 c7 9e 01 60 00 test \$0x60019e,%r15 +[ ]*[a-f0-9]+: 81 d0 9f 01 60 00 adc \$0x60019f,%eax +[ ]*[a-f0-9]+: 81 c3 9f 01 60 00 add \$0x60019f,%ebx +[ ]*[a-f0-9]+: 81 e1 9f 01 60 00 and \$0x60019f,%ecx +[ ]*[a-f0-9]+: 81 fa 9f 01 60 00 cmp \$0x60019f,%edx +[ ]*[a-f0-9]+: 81 ce 9f 01 60 00 or \$0x60019f,%esi +[ ]*[a-f0-9]+: 81 df 9f 01 60 00 sbb \$0x60019f,%edi +[ ]*[a-f0-9]+: 81 ed 9f 01 60 00 sub \$0x60019f,%ebp +[ ]*[a-f0-9]+: 41 81 f0 9f 01 60 00 xor \$0x60019f,%r8d +[ ]*[a-f0-9]+: 41 f7 c7 9f 01 60 00 test \$0x60019f,%r15d +[ ]*[a-f0-9]+: 48 81 d0 9f 01 60 00 adc \$0x60019f,%rax +[ ]*[a-f0-9]+: 48 81 c3 9f 01 60 00 add \$0x60019f,%rbx +[ ]*[a-f0-9]+: 48 81 e1 9f 01 60 00 and \$0x60019f,%rcx +[ ]*[a-f0-9]+: 48 81 fa 9f 01 60 00 cmp \$0x60019f,%rdx +[ ]*[a-f0-9]+: 48 81 cf 9f 01 60 00 or \$0x60019f,%rdi +[ ]*[a-f0-9]+: 48 81 de 9f 01 60 00 sbb \$0x60019f,%rsi +[ ]*[a-f0-9]+: 48 81 ed 9f 01 60 00 sub \$0x60019f,%rbp +[ ]*[a-f0-9]+: 49 81 f0 9f 01 60 00 xor \$0x60019f,%r8 +[ ]*[a-f0-9]+: 49 f7 c7 9f 01 60 00 test \$0x60019f,%r15 #pass |