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: --64
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#ld: -shared -melf_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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[a-f0-9]+ <_start>:
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[ ]*[a-f0-9]+: 13 05 ca 01 20 00 adc 0x2001ca\(%rip\),%eax # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 03 1d c4 01 20 00 add 0x2001c4\(%rip\),%ebx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 23 0d be 01 20 00 and 0x2001be\(%rip\),%ecx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 3b 15 b8 01 20 00 cmp 0x2001b8\(%rip\),%edx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 0b 35 b2 01 20 00 or 0x2001b2\(%rip\),%esi # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 1b 3d ac 01 20 00 sbb 0x2001ac\(%rip\),%edi # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 2b 2d a6 01 20 00 sub 0x2001a6\(%rip\),%ebp # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 44 33 05 9f 01 20 00 xor 0x20019f\(%rip\),%r8d # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 44 85 3d 98 01 20 00 test %r15d,0x200198\(%rip\) # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 13 05 91 01 20 00 adc 0x200191\(%rip\),%rax # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 03 1d 8a 01 20 00 add 0x20018a\(%rip\),%rbx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 23 0d 83 01 20 00 and 0x200183\(%rip\),%rcx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 3b 15 7c 01 20 00 cmp 0x20017c\(%rip\),%rdx # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 0b 3d 75 01 20 00 or 0x200175\(%rip\),%rdi # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 1b 35 6e 01 20 00 sbb 0x20016e\(%rip\),%rsi # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 48 2b 2d 67 01 20 00 sub 0x200167\(%rip\),%rbp # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 4c 33 05 60 01 20 00 xor 0x200160\(%rip\),%r8 # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 4c 85 3d 59 01 20 00 test %r15,0x200159\(%rip\) # 2003e0 <_DYNAMIC\+0xe0>
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[ ]*[a-f0-9]+: 13 05 5b 01 20 00 adc 0x20015b\(%rip\),%eax # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 03 1d 55 01 20 00 add 0x200155\(%rip\),%ebx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 23 0d 4f 01 20 00 and 0x20014f\(%rip\),%ecx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 3b 15 49 01 20 00 cmp 0x200149\(%rip\),%edx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 0b 35 43 01 20 00 or 0x200143\(%rip\),%esi # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 1b 3d 3d 01 20 00 sbb 0x20013d\(%rip\),%edi # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 2b 2d 37 01 20 00 sub 0x200137\(%rip\),%ebp # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 44 33 05 30 01 20 00 xor 0x200130\(%rip\),%r8d # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 44 85 3d 29 01 20 00 test %r15d,0x200129\(%rip\) # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 13 05 22 01 20 00 adc 0x200122\(%rip\),%rax # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 03 1d 1b 01 20 00 add 0x20011b\(%rip\),%rbx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 23 0d 14 01 20 00 and 0x200114\(%rip\),%rcx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 3b 15 0d 01 20 00 cmp 0x20010d\(%rip\),%rdx # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 0b 3d 06 01 20 00 or 0x200106\(%rip\),%rdi # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 1b 35 ff 00 20 00 sbb 0x2000ff\(%rip\),%rsi # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 48 2b 2d f8 00 20 00 sub 0x2000f8\(%rip\),%rbp # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 4c 33 05 f1 00 20 00 xor 0x2000f1\(%rip\),%r8 # 2003e8 <_DYNAMIC\+0xe8>
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[ ]*[a-f0-9]+: 4c 85 3d ea 00 20 00 test %r15,0x2000ea\(%rip\) # 2003e8 <_DYNAMIC\+0xe8>
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#pass
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