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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.
61 lines
1.9 KiB
Makefile
61 lines
1.9 KiB
Makefile
#name: PR ld/20830 (.plt.got)
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#source: pr20830.s
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#as: --x32
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#ld: -melf32_x86_64 -shared -z relro --ld-generated-unwind-info --hash-style=sysv -z max-page-size=0x200000 -z noseparate-code
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#objdump: -dw -Wf
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.*: +file format .*
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Contents of the .eh_frame section:
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0+ 0000000000000014 00000000 CIE
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Version: 1
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Augmentation: "zR"
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Code alignment factor: 1
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Data alignment factor: -8
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Return address column: 16
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Augmentation data: 1b
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DW_CFA_def_cfa: r7 \(rsp\) ofs 8
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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0+18 0000000000000010 0000001c FDE cie=00000000 pc=0000000000000138..0000000000000144
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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0+2c 0000000000000020 00000030 FDE cie=00000000 pc=0000000000000120..0000000000000130
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DW_CFA_def_cfa_offset: 16
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DW_CFA_advance_loc: 6 to 0000000000000126
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DW_CFA_def_cfa_offset: 24
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DW_CFA_advance_loc: 10 to 0000000000000130
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DW_CFA_def_cfa_expression \(DW_OP_breg7 \(rsp\): 8; DW_OP_breg16 \(rip\): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit11; DW_OP_ge; DW_OP_lit3; DW_OP_shl; DW_OP_plus\)
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0+50 0000000000000010 00000054 FDE cie=00000000 pc=0000000000000130..0000000000000138
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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Disassembly of section .plt:
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0+120 <.plt>:
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+[a-f0-9]+: ff 35 e2 0e 20 00 push 0x200ee2\(%rip\) # 201008 <_GLOBAL_OFFSET_TABLE_\+0x8>
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+[a-f0-9]+: ff 25 e4 0e 20 00 jmp \*0x200ee4\(%rip\) # 201010 <_GLOBAL_OFFSET_TABLE_\+0x10>
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+[a-f0-9]+: 0f 1f 40 00 nopl 0x0\(%rax\)
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Disassembly of section .plt.got:
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0+130 <func@plt>:
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+[a-f0-9]+: ff 25 c2 0e 20 00 jmp \*0x200ec2\(%rip\) # 200ff8 <func>
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+[a-f0-9]+: 66 90 xchg %ax,%ax
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Disassembly of section .text:
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0+138 <foo>:
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+[a-f0-9]+: e8 f3 ff ff ff call 130 <func@plt>
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+[a-f0-9]+: 48 8b 05 b4 0e 20 00 mov 0x200eb4\(%rip\),%rax # 200ff8 <func>
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#pass
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