caa65211bb
The ld linker can transform indirect call to a locally defined function,
foo, via its GOT slot, to either "NOP call foo" or "call foo NOP" where
NOP is a 1-byte NOP padding. This patch adds a "-z call-nop=PADDING"
option to x86 ld to control 1-byte NOP padding for x86 call instruction.
PADDING is one of prefix-addr, prefix-nop, suffix-nop, prefix-NUMBER or
suffix-NUMBER.
bfd/
* elf32-i386.c (elf_i386_convert_load): Use call_nop_byte and
check call_nop_as_suffix for 1-byte NOP padding to pad call.
* elf64-x86-64.c (elf_x86_64_convert_load): Likewise.
include/
* bfdlink.h (bfd_link_info): Add call_nop_as_suffix and
call_nop_byte.
ld/
* ld/ld.texinfo: Document "-z call-nop=PADDING" option.
* emulparams/call_nop.sh: New file.
* emulparams/elf_i386_be.sh: Source
${srcdir}/emulparams/call_nop.sh.
* emulparams/elf_i386_chaos.sh: Likewise.
* emulparams/elf_i386_ldso.sh: Likewise.
* emulparams/elf_i386_vxworks.sh: Likewise.
* emulparams/elf_iamcu.sh: Likewise.
* emulparams/elf_k1om.sh: Likewise.
* emulparams/elf_l1om.sh: Likewise.
* emulparams/elf_x86_64.sh: Likewise.
* emultempl/elf32.em (gld${EMULATION_NAME}_before_parse): Set
link_info.call_nop_byte if $CALL_NOP_BYTE isn't empty.
ld/testsuite/
* ld-i386/call3.s: New file.
* ld-i386/call3a.d: Likewise.
* ld-i386/call3b.d: Likewise.
* ld-i386/call3c.d: Likewise.
* ld-i386/call3d.d: Likewise.
* ld-i386/call3e.d: Likewise.
* ld-i386/call3f.d: Likewise.
* ld-i386/call3g.d: Likewise.
* ld-i386/call3h.d: Likewise.
* ld-i386/load1-nacl.d: Likewise.
* ld-x86-64/call1.s: Likewise.
* ld-x86-64/call1a.d: Likewise.
* ld-x86-64/call1b.d: Likewise.
* ld-x86-64/call1c.d: Likewise.
* ld-x86-64/call1d.d: Likewise.
* ld-x86-64/call1e.d: Likewise.
* ld-x86-64/call1f.d: Likewise.
* ld-x86-64/call1g.d: Likewise.
* ld-x86-64/call1h.d: Likewise.
* ld-x86-64/call1i.d: Likewise.
* ld-x86-64/load1a-nacl.d: Likewise.
* ld-x86-64/load1b-nacl.d: Likewise.
* ld-x86-64/load1c-nacl.d: Likewise.
* ld-x86-64/load1d-nacl.d: Likewise.
48 lines
3.7 KiB
Makefile
48 lines
3.7 KiB
Makefile
#source: load1.s
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#as: --x32
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#ld: -shared -melf32_x86_64
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#objdump: -dw
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#notarget: x86_64-*-nacl*
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.*: +file format .*
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Disassembly of section .text:
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0+[a-f0-9]+ <_start>:
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[ ]*[a-f0-9]+: 13 05 5e 01 20 00 adc 0x20015e\(%rip\),%eax # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 03 1d 58 01 20 00 add 0x200158\(%rip\),%ebx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 23 0d 52 01 20 00 and 0x200152\(%rip\),%ecx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 3b 15 4c 01 20 00 cmp 0x20014c\(%rip\),%edx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 0b 35 46 01 20 00 or 0x200146\(%rip\),%esi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 1b 3d 40 01 20 00 sbb 0x200140\(%rip\),%edi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 2b 2d 3a 01 20 00 sub 0x20013a\(%rip\),%ebp # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 33 05 33 01 20 00 xor 0x200133\(%rip\),%r8d # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 85 3d 2c 01 20 00 test %r15d,0x20012c\(%rip\) # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 13 05 25 01 20 00 adc 0x200125\(%rip\),%rax # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 03 1d 1e 01 20 00 add 0x20011e\(%rip\),%rbx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 23 0d 17 01 20 00 and 0x200117\(%rip\),%rcx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 3b 15 10 01 20 00 cmp 0x200110\(%rip\),%rdx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 0b 3d 09 01 20 00 or 0x200109\(%rip\),%rdi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 1b 35 02 01 20 00 sbb 0x200102\(%rip\),%rsi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 2b 2d fb 00 20 00 sub 0x2000fb\(%rip\),%rbp # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 33 05 f4 00 20 00 xor 0x2000f4\(%rip\),%r8 # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 85 3d ed 00 20 00 test %r15,0x2000ed\(%rip\) # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 13 05 ef 00 20 00 adc 0x2000ef\(%rip\),%eax # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 03 1d e9 00 20 00 add 0x2000e9\(%rip\),%ebx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 23 0d e3 00 20 00 and 0x2000e3\(%rip\),%ecx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 3b 15 dd 00 20 00 cmp 0x2000dd\(%rip\),%edx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 0b 35 d7 00 20 00 or 0x2000d7\(%rip\),%esi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 1b 3d d1 00 20 00 sbb 0x2000d1\(%rip\),%edi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 2b 2d cb 00 20 00 sub 0x2000cb\(%rip\),%ebp # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 33 05 c4 00 20 00 xor 0x2000c4\(%rip\),%r8d # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 85 3d bd 00 20 00 test %r15d,0x2000bd\(%rip\) # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 13 05 b6 00 20 00 adc 0x2000b6\(%rip\),%rax # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 03 1d af 00 20 00 add 0x2000af\(%rip\),%rbx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 23 0d a8 00 20 00 and 0x2000a8\(%rip\),%rcx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 3b 15 a1 00 20 00 cmp 0x2000a1\(%rip\),%rdx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 0b 3d 9a 00 20 00 or 0x20009a\(%rip\),%rdi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 1b 35 93 00 20 00 sbb 0x200093\(%rip\),%rsi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 2b 2d 8c 00 20 00 sub 0x20008c\(%rip\),%rbp # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 33 05 85 00 20 00 xor 0x200085\(%rip\),%r8 # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 85 3d 7e 00 20 00 test %r15,0x20007e\(%rip\) # 2002d8 <_DYNAMIC\+0x78>
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#pass
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