=====GNU Debugger=====

==a==Links==a==

[[http://wap-pool.math.uni-bayreuth.de/prog/main.html Über Debugger auf den Seiten der Universität Bayreuth]] (gdb, GVD, DDD, Watcom)
http://herbert.the-little-red-haired-girl.org/c-tips/gcc/index.html#gdb
http://galileocomputing.de/openbook/linux/linux_kap21_003.htm#mj2c3920392b80b1b880c509056e00f1b0


==a==Verwendung==a==

%%gdb myExecutable%%

Für andere Architekturen siege gdb-multiarch oder Beispiel [[STM32L412]] and [[STLink]]


==a==Kommandos==a==

Kommandos für den gdb

run
backtrace
list
print <value>
quit



==a==Installation von  gdb-multiarch==a==

Install [[GnuDebugger]] for other archtectures if not at ARM anyway e.g. Raspberry Pi
%%sudo apt install gdb-multiarch%%

Execute with example from [[STM32L412]]
%%gdb-multiarch asm.o%%

%%
Type "apropos word" to search for commands related to "word"...
Reading symbols from asm.o...

(gdb) disassemble led_setup
Dump of assembler code for function led_setup:
   0x0000007e <+0>:	push	{r0, r1, lr}
   0x00000080 <+2>:	ldr.w	r1, [pc, #-4]	; 0x80 <led_setup+2>
   0x00000084 <+6>:	ldr	r0, [r1, #0]
   0x00000086 <+8>:	orr.w	r0, r0, #2
   0x0000008a <+12>:	str	r0, [r1, #0]
   0x0000008c <+14>:	ldr.w	r1, [pc, #-4]	; 0x8c <led_setup+14>
   0x00000090 <+18>:	ldr.w	r0, [pc, #-4]	; 0x90 <led_setup+18>
   0x00000094 <+22>:	str	r0, [r1, #0]
   0x00000096 <+24>:	bl	0x9c <led_on>
   0x0000009a <+28>:	pop	{r0, r1, pc}


%%


Disassemble and show binary code
%%
(gdb) disassemble /r led_setup
%%


%%
(gdb) disassemble /r main
Dump of assembler code for function main:
   0x00000000 <+0>:	00 f0 30 f8	bl	0x64 <systick_setup>
   0x00000004 <+4>:	00 f0 3b f8	bl	0x7e <led_setup>
   0x00000008 <+8>:	4f f0 00 00	mov.w	r0, #0
   0x0000000c <+12>:	4f f0 05 01	mov.w	r1, #5
   0x00000010 <+16>:	4f f0 01 02	mov.w	r2, #1
   0x00000014 <+20>:	4f f0 00 03	mov.w	r3, #0
   0x00000018 <+24>:	af f2 04 04	subw	r4, pc, #4
   0x0000001c <+28>:	25 68	ldr	r5, [r4, #0]
   0x0000001e <+30>:	5f f8 04 60	ldr.w	r6, [pc, #-4]	; 0x1c <main+28>
   0x00000022 <+34>:	5f f8 04 70	ldr.w	r7, [pc, #-4]	; 0x20 <main+32>
   0x00000026 <+38>:	5f f8 04 a0	ldr.w	r10, [pc, #-4]	; 0x24 <main+36>

%%

%%
(gdb) dump binary memory asm_memory.bin 0x0 0xbc
%%





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Siehe auch {{backlinks}}