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https://sourceware.org/git/binutils-gdb.git
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36938cabf0
"Unambiguous" is is in particular taking as reference the assembler, which also accepts certain insns - despite them allowing for varying operand size, and hence in principle being ambiguous - without any suffix. For example, from the very beginning of the life of x86-64 I had trouble understanding why a plain and simple RET had to be printed as RETQ. In case someone really used the 16-bit form, RETW disambiguates the two quite fine.
44 lines
1.6 KiB
D
44 lines
1.6 KiB
D
#source: ibt-plt-1.s
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#as: --x32
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#ld: -shared -m elf32_x86_64 --hash-style=sysv -z max-page-size=0x200000 -z noseparate-code
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#objdump: -dw
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.*: +file format .*
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Disassembly of section .plt:
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[a-f0-9]+ <.plt>:
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+[a-f0-9]+: ff 35 ([0-9a-f]{2} ){4}[ ]+push 0x[a-f0-9]+\(%rip\) # [a-f0-9]+ <_GLOBAL_OFFSET_TABLE_\+0x8>
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+[a-f0-9]+: ff 25 ([0-9a-f]{2} ){4}[ ]+jmp \*0x[a-f0-9]+\(%rip\) # [a-f0-9]+ <_GLOBAL_OFFSET_TABLE_\+0x10>
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+[a-f0-9]+: 0f 1f 40 00 nopl 0x0\(%rax\)
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+[a-f0-9]+: f3 0f 1e fa endbr64
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+[a-f0-9]+: 68 00 00 00 00 push \$0x0
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+[a-f0-9]+: e9 e2 ff ff ff jmp [a-f0-9]+ <.plt>
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+[a-f0-9]+: 66 90 xchg %ax,%ax
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+[a-f0-9]+: f3 0f 1e fa endbr64
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+[a-f0-9]+: 68 01 00 00 00 push \$0x1
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+[a-f0-9]+: e9 d2 ff ff ff jmp [a-f0-9]+ <.plt>
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+[a-f0-9]+: 66 90 xchg %ax,%ax
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Disassembly of section .plt.sec:
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[a-f0-9]+ <bar1@plt>:
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+[a-f0-9]+: f3 0f 1e fa endbr64
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+[a-f0-9]+: ff 25 ([0-9a-f]{2} ){4}[ ]+jmp \*0x[a-f0-9]+\(%rip\) # [a-f0-9]+ <bar1>
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+[a-f0-9]+: 66 0f 1f 44 00 00 nopw 0x0\(%rax,%rax,1\)
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[a-f0-9]+ <bar2@plt>:
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+[a-f0-9]+: f3 0f 1e fa endbr64
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+[a-f0-9]+: ff 25 ([0-9a-f]{2} ){4}[ ]+jmp \*0x[a-f0-9]+\(%rip\) # [a-f0-9]+ <bar2>
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+[a-f0-9]+: 66 0f 1f 44 00 00 nopw 0x0\(%rax,%rax,1\)
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Disassembly of section .text:
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[a-f0-9]+ <foo>:
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+[a-f0-9]+: 48 83 ec 08 sub \$0x8,%rsp
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+[a-f0-9]+: e8 e7 ff ff ff call [a-f0-9]+ <bar2@plt>
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+[a-f0-9]+: 48 83 c4 08 add \$0x8,%rsp
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+[a-f0-9]+: e9 ce ff ff ff jmp [a-f0-9]+ <bar1@plt>
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#pass
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