gdb disassembler prints program offsets in decimal notation, for example:
gdb get_t_hr0 <<< "disas main"
...
0x0000000000400ff8 <+54>: jle 0x400fd3
0x0000000000400ffa <+56>: mov -0x30(%rbp),%rax
0x0000000000400ffe <+60>: cvtsi2sd %rax,%xmm0
0x0000000000401003 <+65>: movsd -0x27b(%rip),%xmm1 # 0x400d90
0x000000000040100b <+73>: mulsd %xmm0,%xmm1
0x000000000040100f <+77>: mov -0x28(%rbp),%rax
0x0000000000401013 <+81>: cvtsi2sd %rax,%xmm0
0x0000000000401018 <+86>: addsd %xmm1,%xmm0
0x000000000040101c <+90>: cvttsd2si %xmm0,%rax
0x0000000000401021 <+95>: mov %rax,-0x18(%rbp)
0x0000000000401025 <+99>: cvtsi2sdq -0x18(%rbp),%xmm0
0x000000000040102b <+105>: cvtsi2sdq -0x8(%rbp),%xmm1
0x0000000000401031 <+111>: movsd -0x2a1(%rip),%xmm2 # 0x400d98
0x0000000000401039 <+119>: divsd %xmm2,%xmm1
0x000000000040103d <+123>: subsd %xmm1,%xmm0
0x0000000000401041 <+127>: cvttsd2si %xmm0,%rax
0x0000000000401046 <+132>: mov %rax,-0x20(%rbp)
0x000000000040104a <+136>: mov -0x20(%rbp),%rax
0x000000000040104e <+140>: mov %rax,%rsi
0x0000000000401051 <+143>: mov $0x400d88,%edi
0x0000000000401056 <+148>: mov $0x0,%eax
0x000000000040105b <+153>: callq 0x400e10
0x0000000000401060 <+158>: mov $0x0,%eax
0x0000000000401065 <+163>: leaveq
0x0000000000401066 <+164>: retq All other OS diagnostic tools, like pstack, DTrace, etc. use hexadecimal notation, e.g.:
$ pstack 7633
7633: ora_lgwr_DB1
00007ffc40b7741a portfs (5, 4, 7fffbfff8400, 2, 3b9aba60, 7fffbfff8420)
00000000061dc6bd sskgpwwait () + dd
00000000061dc2a3 skgpwwait () + c3
00000000063de2c4 ksliwat () + 9b4
00000000063dd4af kslwaitctx () + af
00000000073094b7 ksarcv () + 167
00000000073082b9 ksbabs () + 2b9
00000000073064b1 ksbrdp () + 561
0000000006f0e779 opirip () + 2b9
00000000061277b0 opidrv () + 160
00000000061275c7 sou2o () + 97
0000000006127394 opimai_real () + a4
0000000006126eeb ssthrdmain () + 26b
0000000006126c59 main () + a9
0000000007787eb4 ???????? ()This mismatch is inconvenient when reverse engineering and troubleshooting.
I wrote a one-liner that converts the offsets in disassembled code to hexadecimal notation:
gdb get_t_hr0 <<< "disas main" | perl -pe 's/\+[0-9]+>/sprintf "+0x%x>", $&/ge'
...
0x0000000000400ff8 <+0x36>: jle 0x400fd3
0x0000000000400ffa <+0x38>: mov -0x30(%rbp),%rax
0x0000000000400ffe <+0x3c>: cvtsi2sd %rax,%xmm0
0x0000000000401003 <+0x41>: movsd -0x27b(%rip),%xmm1 # 0x400d90
0x000000000040100b <+0x49>: mulsd %xmm0,%xmm1
0x000000000040100f <+0x4d>: mov -0x28(%rbp),%rax
0x0000000000401013 <+0x51>: cvtsi2sd %rax,%xmm0
0x0000000000401018 <+0x56>: addsd %xmm1,%xmm0
0x000000000040101c <+0x5a>: cvttsd2si %xmm0,%rax
0x0000000000401021 <+0x5f>: mov %rax,-0x18(%rbp)
0x0000000000401025 <+0x63>: cvtsi2sdq -0x18(%rbp),%xmm0
0x000000000040102b <+0x69>: cvtsi2sdq -0x8(%rbp),%xmm1
0x0000000000401031 <+0x6f>: movsd -0x2a1(%rip),%xmm2 # 0x400d98
0x0000000000401039 <+0x77>: divsd %xmm2,%xmm1
0x000000000040103d <+0x7b>: subsd %xmm1,%xmm0
0x0000000000401041 <+0x7f>: cvttsd2si %xmm0,%rax
0x0000000000401046 <+0x84>: mov %rax,-0x20(%rbp)
0x000000000040104a <+0x88>: mov -0x20(%rbp),%rax
0x000000000040104e <+0x8c>: mov %rax,%rsi
0x0000000000401051 <+0x8f>: mov $0x400d88,%edi
0x0000000000401056 <+0x94>: mov $0x0,%eax
0x000000000040105b <+0x99>: callq 0x400e10
0x0000000000401060 <+0x9e>: mov $0x0,%eax
0x0000000000401065 <+0xa3>: leaveq
0x0000000000401066 <+0xa4>: retq
