Hi all,
I have two traces from gem5(x86-linux) and pin-tool and I find that
some of the instructions are different.
For example, the "syscall" in pin-tool trace is different from the one
"sysret" in gem5 trace. The pc address is also not right.
Is that a bug in gem5 or a misuse of the tracing function? Thanks a lot!
---------------------------------------------trace from
gem5---------------------------------------------
0x40f5af jnb 0x175
0x40f5b5 cmp rax, 0x4000
0x40f5bc jnbe 0x3a
0x40f5f8 sub rax, 0x4000
0x40f5ff mov edx, 0x4
0x40f604 call 0x31927
0x440f30 mov eax, 0x1c
0xffffffff80209788 sysret
0x440f37 cmp rax, 0xfffffffffffff001
0x440f3d jnb 0xfffffffffffd2d1d
0x440f43 ret
0x40f609 jmp 0xffffffffffffffb3
0x40f5be mov rax, DS:[rsp + 0x8]
0x40f5c3 mov rbx, DS:[rax + 0x628]
0x40f5ca cmp rbx, rax
0x40f5cd jz 0x8d
0x40f5d3 test DS:[rax + 0x308], 0x40
0x40f5da jnz 0xb6
0x40f5e0 xor edi, edi
0x40f5e2 mov eax, 0x3c
------------------------------------------trace from
pin-tool----------------------------------------
40f5b5 cmp rsi, 0x4000
40f5bc jnbe 0x40f5f8
40f5f8 sub rsi, 0x4000
40f5ff mov edx, 0x4
40f604 call 0x440f30
440f30 mov eax, 0x1c
440f35 syscall
440f37 cmp rax, 0xfffffffffffff001
440f3d jnb 0x413c60
440f43 ret
40f609 jmp 0x40f5be
40f5be mov rax, qword ptr [rsp+0x8]
40f5c3 mov rbx, qword ptr [rax+0x628]
40f5ca cmp rbx, rax
40f5cd jz 0x40f660
40f5d3 test byte ptr [rax+0x308], 0x40
40f5da jnz 0x40f696
40f5e0 xor edi, edi
40f5e2 mov eax, 0x3c
40f5e7 syscall
Weixing
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