GDB常用功能

执行时，常用-q去掉copyright等无用信息：

gdb ./a.out -q

 

Command	simple cmd	Effect
Starting and stopping
quit	q	Exit GDB
run	r	Run your program(give command line  arguments here)
kill	k	stop your program
set args		before run, set running args
BreakPoints
break sum	b sum	set breakpoint at entry to function sum
break *0x80483c3	b *0x80483c3	set breakpoint at address 0x80483c3
delete 1	d 1	delete breakpoint 1
delete	d	delete all breakpoint
Execution
stepi	si	execute one instruction
stepi 4	si 4	execute 4 instructions
nexti	ni	Like stepi, but process through function calls
continue	c	resume execution
finish	f	run until current function returns
Examining code
disas		Disassemble current function
disas sum		Disassemble function sum
disas 0x80483b7		Disassemble function around address 0x80483b7
disas 0x80483b7 0x80483c7		Disassemble code within specified address range
print /x $eip		Print program counter in hex
Examining data
print $eax	p $eax	Print contents of %eax in decimal
print /x $eax		Print contents of %eax in hex
print /t $eax		Print contents of %eax in binary
print 0x100		Print decimal representation of 0x100
print /x 555		Print hex representation of 555
print /x ($ebp+8)		Print contents of %ebp plus 8 in hex
print*(int*)0xbffff890		Printintegerataddress0xbffff890
print *(int *) ($ebp+8)		Print integer at address %ebp + 8
x/2w 0xbffff890		Examine two (4-byte) words starting at address 0xbffff890
x/20b sum		Examine first 20 bytes of function sum
Useful information
info frame		Information about current stack frame
info registers		Values of all the registers