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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.
34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
#source: plt2.s
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#as: --64
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#ld: -z now -melf_x86_64
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#objdump: -dwr
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#target: i?86-*-*
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.*: +file format .*
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Disassembly of section .plt:
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0+400220 <.plt>:
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+[a-f0-9]+: ff 35 7a 01 20 00 push 0x20017a\(%rip\) # 6003a0 <_GLOBAL_OFFSET_TABLE_\+0x8>
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+[a-f0-9]+: ff 25 7c 01 20 00 jmp \*0x20017c\(%rip\) # 6003a8 <_GLOBAL_OFFSET_TABLE_\+0x10>
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+[a-f0-9]+: 0f 1f 40 00 nopl 0x0\(%rax\)
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0+400230 <fn1@plt>:
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+[a-f0-9]+: ff 25 7a 01 20 00 jmp \*0x20017a\(%rip\) # 6003b0 <fn1>
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+[a-f0-9]+: 68 00 00 00 00 push \$0x0
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+[a-f0-9]+: e9 e0 ff ff ff jmp 400220 <.plt>
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0+400240 <fn2@plt>:
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+[a-f0-9]+: ff 25 72 01 20 00 jmp \*0x200172\(%rip\) # 6003b8 <fn2>
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+[a-f0-9]+: 68 01 00 00 00 push \$0x1
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+[a-f0-9]+: e9 d0 ff ff ff jmp 400220 <.plt>
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Disassembly of section .text:
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0+400250 <_start>:
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+[a-f0-9]+: e8 db ff ff ff call 400230 <fn1@plt>
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+[a-f0-9]+: e8 e6 ff ff ff call 400240 <fn2@plt>
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+[a-f0-9]+: 81 7c 24 08 30 02 40 00 cmpl \$0x400230,0x8\(%rsp\)
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#pass
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