d258b82828
This patch adds "-z bndplt" option Linux/x86-64 linker to generate BND
prefix in PLT entries. It also updated Linux/x86-64 assembler not to
generate R_X86_64_PLT32_BND nor R_X86_64_PC32_BND relocations.
bfd/
2014-11-18 Igor Zamyatin <igor.zamyatin@intel.com>
* elf64-x86-64.c (elf_x86_64_check_relocs): Enable MPX PLT only
for -z bndplt.
gas/
2014-11-18 Igor Zamyatin <igor.zamyatin@intel.com>
* config/tc-i386-intel.c (i386_operator): Remove last argument
from lex_got call.
* config/tc-i386.c (reloc): Remove bnd_prefix from parameters'
list. Return always BFD_RELOC_32_PCREL.
* (output_branch): Remove condition for BFD_RELOC_X86_64_PC32_BND.
* (output_jump): Update call to reloc accordingly.
* (output_interseg_jump): Likewise.
* (output_disp): Likewise.
* (output_imm): Likewise.
* (x86_cons_fix_new): Likewise.
* (lex_got): Remove bnd_prefix from parameters' list in macro and
declarations. Don't use BFD_RELOC_X86_64_PLT32_BND.
* (x86_cons): Update call to lex_got accordingly.
* (i386_immediate): Likewise.
* (i386_displacement): Likewise.
* (md_apply_fix): Don't use BFD_RELOC_X86_64_PLT32_BND nor
BFD_RELOC_X86_64_PC32_BND.
* (tc_gen_reloc): Likewise.
include/
2014-11-18 Igor Zamyatin <igor.zamyatin@intel.com>
* bfdlink.h (struct bfd_link_info): Add bndplt.
ld/
2014-11-18 Igor Zamyatin <igor.zamyatin@intel.com>
* emulparams/elf_x86_64.sh (BNDPLT): Set to yes for x86_64.
* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Handle
"-z bndplt" if BNDPLT is yes.
(gld${EMULATION_NAME}_list_options): Add "-z bndplt" entry.
* ld.texinfo: Add description for bndplt.
ld/testsuite/
2014-11-18 Igor Zamyatin <igor.zamyatin@intel.com>
* testsuite/ld-x86-64/bnd-ifunc-1.d: Add bndplt option.
* testsuite/ld-x86-64/bnd-ifunc-2.d: Likewise.
* testsuite/ld-x86-64/bnd-plt-1.d: Likewise. Update dissassembly
sections.
* testsuite/ld-x86-64/mpx.exp: Handle mpx3 and mpx4 tests.
* testsuite/ld-x86-64/mpx1a.rd: Remove _BND from relocation name.
* testsuite/ld-x86-64/mpx1c.rd: Likewise.
* testsuite/ld-x86-64/mpx2a.rd: Likewise.
* testsuite/ld-x86-64/mpx2c.rd: Likewise.
* testsuite/ld-x86-64/mpx3.dd: New file.
* testsuite/ld-x86-64/mpx3a.s: Likewise.
* testsuite/ld-x86-64/mpx3b.s: Likewise.
* testsuite/ld-x86-64/mpx4.dd: Likewise.
* testsuite/ld-x86-64/mpx4a.s: Likewise.
* testsuite/ld-x86-64/mpx4b.s: Likewise.
54 lines
2.2 KiB
Makefile
54 lines
2.2 KiB
Makefile
#as: --64 -madd-bnd-prefix
|
|
#ld: -shared -melf_x86_64 -z bndplt
|
|
#objdump: -dw
|
|
|
|
#...
|
|
0+2d0 <.plt>:
|
|
[ ]*[a-f0-9]+: ff 35 7a 01 20 00 pushq 0x20017a\(%rip\) # 200450 <_GLOBAL_OFFSET_TABLE_\+0x8>
|
|
[ ]*[a-f0-9]+: f2 ff 25 7b 01 20 00 bnd jmpq \*0x20017b\(%rip\) # 200458 <_GLOBAL_OFFSET_TABLE_\+0x10>
|
|
[ ]*[a-f0-9]+: 0f 1f 00 nopl \(%rax\)
|
|
[ ]*[a-f0-9]+: 68 03 00 00 00 pushq \$0x3
|
|
[ ]*[a-f0-9]+: f2 e9 e5 ff ff ff bnd jmpq 2d0 <\*ABS\*\+0x34c@plt-0x50>
|
|
[ ]*[a-f0-9]+: 0f 1f 44 00 00 nopl 0x0\(%rax,%rax,1\)
|
|
[ ]*[a-f0-9]+: 68 00 00 00 00 pushq \$0x0
|
|
[ ]*[a-f0-9]+: f2 e9 d5 ff ff ff bnd jmpq 2d0 <\*ABS\*\+0x34c@plt-0x50>
|
|
[ ]*[a-f0-9]+: 0f 1f 44 00 00 nopl 0x0\(%rax,%rax,1\)
|
|
[ ]*[a-f0-9]+: 68 01 00 00 00 pushq \$0x1
|
|
[ ]*[a-f0-9]+: f2 e9 c5 ff ff ff bnd jmpq 2d0 <\*ABS\*\+0x34c@plt-0x50>
|
|
[ ]*[a-f0-9]+: 0f 1f 44 00 00 nopl 0x0\(%rax,%rax,1\)
|
|
[ ]*[a-f0-9]+: 68 02 00 00 00 pushq \$0x2
|
|
[ ]*[a-f0-9]+: f2 e9 b5 ff ff ff bnd jmpq 2d0 <\*ABS\*\+0x34c@plt-0x50>
|
|
[ ]*[a-f0-9]+: 0f 1f 44 00 00 nopl 0x0\(%rax,%rax,1\)
|
|
|
|
Disassembly of section .plt.bnd:
|
|
|
|
0+320 <\*ABS\*\+0x34c@plt>:
|
|
[ ]*[a-f0-9]+: f2 ff 25 39 01 20 00 bnd jmpq \*0x200139\(%rip\) # 200460 <_GLOBAL_OFFSET_TABLE_\+0x18>
|
|
[ ]*[a-f0-9]+: 90 nop
|
|
|
|
0+328 <func1@plt>:
|
|
[ ]*[a-f0-9]+: f2 ff 25 39 01 20 00 bnd jmpq \*0x200139\(%rip\) # 200468 <_GLOBAL_OFFSET_TABLE_\+0x20>
|
|
[ ]*[a-f0-9]+: 90 nop
|
|
|
|
0+330 <func2@plt>:
|
|
[ ]*[a-f0-9]+: f2 ff 25 39 01 20 00 bnd jmpq \*0x200139\(%rip\) # 200470 <_GLOBAL_OFFSET_TABLE_\+0x28>
|
|
[ ]*[a-f0-9]+: 90 nop
|
|
|
|
0+338 <\*ABS\*\+0x340@plt>:
|
|
[ ]*[a-f0-9]+: f2 ff 25 39 01 20 00 bnd jmpq \*0x200139\(%rip\) # 200478 <_GLOBAL_OFFSET_TABLE_\+0x30>
|
|
[ ]*[a-f0-9]+: 90 nop
|
|
|
|
Disassembly of section .text:
|
|
|
|
0+340 <resolve1>:
|
|
[ ]*[a-f0-9]+: f2 e8 e2 ff ff ff bnd callq 328 <func1@plt>
|
|
|
|
0+346 <g1>:
|
|
[ ]*[a-f0-9]+: f2 e9 ec ff ff ff bnd jmpq 338 <\*ABS\*\+0x340@plt>
|
|
|
|
0+34c <resolve2>:
|
|
[ ]*[a-f0-9]+: f2 e8 de ff ff ff bnd callq 330 <func2@plt>
|
|
|
|
0+352 <g2>:
|
|
[ ]*[a-f0-9]+: f2 e9 c8 ff ff ff bnd jmpq 320 <\*ABS\*\+0x34c@plt>
|
|
#pass
|