# 打印寄存器的值 ## 技巧 用gdb調試程序時，如果想查看寄存器的值，可以使用“i registers”命令（i是info命令縮寫），例如: (gdb) i registers rax 0x7ffff7dd9f60 140737351884640 rbx 0x0 0 rcx 0x0 0 rdx 0x7fffffffe608 140737488348680 rsi 0x7fffffffe5f8 140737488348664 rdi 0x1 1 rbp 0x7fffffffe510 0x7fffffffe510 rsp 0x7fffffffe4c0 0x7fffffffe4c0 r8 0x7ffff7dd8300 140737351877376 r9 0x7ffff7deb9e0 140737351956960 r10 0x7fffffffe360 140737488348000 r11 0x7ffff7a68be0 140737348275168 r12 0x4003e0 4195296 r13 0x7fffffffe5f0 140737488348656 r14 0x0 0 r15 0x0 0 rip 0x4004cd 0x4004cd <main+9> eflags 0x206 [ PF IF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 以上輸出不包括浮點寄存器和向量寄存器的內容。使用“i all-registers”命令，可以輸出所有寄存器的內容： (gdb) i all-registers rax 0x7ffff7dd9f60 140737351884640 rbx 0x0 0 rcx 0x0 0 rdx 0x7fffffffe608 140737488348680 rsi 0x7fffffffe5f8 140737488348664 rdi 0x1 1 rbp 0x7fffffffe510 0x7fffffffe510 rsp 0x7fffffffe4c0 0x7fffffffe4c0 r8 0x7ffff7dd8300 140737351877376 r9 0x7ffff7deb9e0 140737351956960 r10 0x7fffffffe360 140737488348000 r11 0x7ffff7a68be0 140737348275168 r12 0x4003e0 4195296 r13 0x7fffffffe5f0 140737488348656 r14 0x0 0 r15 0x0 0 rip 0x4004cd 0x4004cd <main+9> eflags 0x206 [ PF IF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 st0 0 (raw 0x00000000000000000000) st1 0 (raw 0x00000000000000000000) st2 0 (raw 0x00000000000000000000) st3 0 (raw 0x00000000000000000000) st4 0 (raw 0x00000000000000000000) st5 0 (raw 0x00000000000000000000) st6 0 (raw 0x00000000000000000000) st7 0 (raw 0x00000000000000000000) ...... 要打印單個寄存器的值，可以使用“i registers regname”或者“p $regname”，例如： (gdb) i registers eax eax 0xf7dd9f60 -136470688 (gdb) p $eax $1 = -136470688 參見[gdb手冊](https://sourceware.org/gdb/onlinedocs/gdb/Registers.html). ## 貢獻者 nanxiao