gdb笔记
i reg 看寄存器 info
bt full backtrace
p $eax print
print有各种格式，p/x 16进制，p/o 8进制,p/s 字符
x/格式 地址
x $pc pc为程序指针也叫eip
x/i $pc 汇编指令 ★★★★★★★★★★
disas $pc disassemble 反汇编命令
(gdb) i regeax 0xfffffdfe -514ecx 0x8 8edx 0xb74c0ff4 -1219751948ebx 0xbfe34850 -1075623856esp 0xbfe347e0 0xbfe347e0ebp 0x85f1968 0x85f1968esi 0x1 1edi 0x85f08a8 140445864eip 0xb7721424 0xb7721424 <__kernel_vsyscall+16>eflags 0x200246 [ PF ZF IF ID ]cs 0x73 115ss 0x7b 123ds 0x7b 123es 0x7b 123fs 0x0 0gs 0x33 51(gdb) p $eax$1 = -514(gdb) p/x $eax$2 = 0xfffffdfe(gdb) p/d $eax$3 = -514(gdb) p/u $eax$4 = 4294966782(gdb) p/o $eax$5 = 037777776776(gdb) p/t $eax$6 = 11111111111111111111110111111110(gdb) p/c $eax$7 = -2 '\376'(gdb) p/f $eax$8 = -nan(0x7ffdfe)(gdb) p/s $eax$9 = -514(gdb) p/i $eaxFormat letter "i" is meaningless in "print" command.(gdb)
