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
3.8 KiB
Makefile
48 lines
3.8 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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#target: x86_64-*-nacl*
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.*: +file format .*
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Disassembly of section .text:
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0+ <_start>:
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[ ]*[a-f0-9]+: 13 05 fa 01 01 10 adc 0x100101fa\(%rip\),%eax # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 03 1d f4 01 01 10 add 0x100101f4\(%rip\),%ebx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 23 0d ee 01 01 10 and 0x100101ee\(%rip\),%ecx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 3b 15 e8 01 01 10 cmp 0x100101e8\(%rip\),%edx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 0b 35 e2 01 01 10 or 0x100101e2\(%rip\),%esi # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 1b 3d dc 01 01 10 sbb 0x100101dc\(%rip\),%edi # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 2b 2d d6 01 01 10 sub 0x100101d6\(%rip\),%ebp # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 33 05 cf 01 01 10 xor 0x100101cf\(%rip\),%r8d # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 85 3d c8 01 01 10 test %r15d,0x100101c8\(%rip\) # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 13 05 c1 01 01 10 adc 0x100101c1\(%rip\),%rax # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 03 1d ba 01 01 10 add 0x100101ba\(%rip\),%rbx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 23 0d b3 01 01 10 and 0x100101b3\(%rip\),%rcx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 3b 15 ac 01 01 10 cmp 0x100101ac\(%rip\),%rdx # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 0b 3d a5 01 01 10 or 0x100101a5\(%rip\),%rdi # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 1b 35 9e 01 01 10 sbb 0x1001019e\(%rip\),%rsi # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 2b 2d 97 01 01 10 sub 0x10010197\(%rip\),%rbp # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 33 05 90 01 01 10 xor 0x10010190\(%rip\),%r8 # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 85 3d 89 01 01 10 test %r15,0x10010189\(%rip\) # 10010200 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 13 05 8b 01 01 10 adc 0x1001018b\(%rip\),%eax # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 03 1d 85 01 01 10 add 0x10010185\(%rip\),%ebx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 23 0d 7f 01 01 10 and 0x1001017f\(%rip\),%ecx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 3b 15 79 01 01 10 cmp 0x10010179\(%rip\),%edx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 0b 35 73 01 01 10 or 0x10010173\(%rip\),%esi # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 1b 3d 6d 01 01 10 sbb 0x1001016d\(%rip\),%edi # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 2b 2d 67 01 01 10 sub 0x10010167\(%rip\),%ebp # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 33 05 60 01 01 10 xor 0x10010160\(%rip\),%r8d # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 85 3d 59 01 01 10 test %r15d,0x10010159\(%rip\) # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 13 05 52 01 01 10 adc 0x10010152\(%rip\),%rax # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 03 1d 4b 01 01 10 add 0x1001014b\(%rip\),%rbx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 23 0d 44 01 01 10 and 0x10010144\(%rip\),%rcx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 3b 15 3d 01 01 10 cmp 0x1001013d\(%rip\),%rdx # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 0b 3d 36 01 01 10 or 0x10010136\(%rip\),%rdi # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 1b 35 2f 01 01 10 sbb 0x1001012f\(%rip\),%rsi # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 2b 2d 28 01 01 10 sub 0x10010128\(%rip\),%rbp # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 33 05 21 01 01 10 xor 0x10010121\(%rip\),%r8 # 10010208 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 85 3d 1a 01 01 10 test %r15,0x1001011a\(%rip\) # 10010208 <_DYNAMIC\+0x78>
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#pass
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