C:\Users\Jenda\Documents\ARM_GCC_Tools\bin>arm-none-eabi-gdb.exe
"C:\Users\Jenda\Documents\STM32\STM32L1\Debug test\Debug\Debug
test.elf"
C:\Users\Jenda\Documents\ARM_GCC_Tools\bin\arm-none-eabi-gdb.exe:
warning: Couldn't determine a path for the index cache directory.
GNU gdb (GNU Tools for Arm Embedded Processors 8-2018-q4-major)
8.2.50.20181213-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "--host=i686-w64-mingw32
--target=arm-none-eabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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<http://www.gnu.org/software/gdb/documentation/>.
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Reading symbols from C:\Users\Jenda\Documents\STM32\STM32L1\Debug
test\Debug\Debug test.elf...
(gdb) target remote localhost:3333 # připojení k OpenOCD
Remote debugging using localhost:3333
0x00000000 in ?? ()
(gdb) load # nahrání proramu na MCU
Loading section .isr_vector, size 0x13c lma 0x8000000
Loading section .text, size 0x1474 lma 0x800013c
Loading section .rodata, size 0x1c lma 0x80015b0
Loading section .init_array, size 0x4 lma 0x80015cc
Loading section .fini_array, size 0x4 lma 0x80015d0
Loading section .data, size 0xc lma 0x80015d4
Start address 0x80014f4, load size 5600
Transfer rate: 5 KB/sec, 933 bytes/write.
(gdb) monitor
reset halt # zastavení MCU
Unable to match requested speed 300 kHz, using 240 kHz
Unable to match requested speed 300 kHz, using 240 kHz
adapter speed: 240 kHz
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x080014f4 msp: 0x20004000
(gdb) l # zobrazení zdrojového kódu
warning: Source file is more recent than executable.
62 /**
63 * @brief The application entry point.
64 * @retval int
65 */
66 int main(void)
67 {
68 /* USER CODE BEGIN 1
*/
69
70 /* USER CODE END 1 */
71
(gdb) l 95 # zobrazení zdrojového kódu od řádky
85
90 MX_GPIO_Init();
91 /* USER CODE BEGIN 2
*/
92 volatile char
array[10];
93 array[0] = 'a';
94 array[1] = 'b';
95 //array[25] = 'x';
96 array[2] = 'c';
97 array[3] = 'd';
98
99 for (int i = 8;
i<10; i++) array[i] = i;
(gdb) b 97 # přidání breakpointu na řádek 97
Breakpoint 1 at 0x8001242: file ..\Src\main.c, line 97.
(gdb) c # pokračování běhu programu
Continuing.
Note: automatically using hardware breakpoints for read-only
addresses.
Breakpoint 1, main () at
..\Src\main.c:97 # běh se zastavil na bteakpointu
97 array[3] = 'd';
(gdb) c
Continuing.
Program received signal SIGINT, Interrupt.
HAL_GPIO_ReadPin (GPIOx=0x40020000, GPIO_Pin=1) at
..\Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c:401
401 }
(gdb) c
Continuing.
Program received signal SIGINT, Interrupt.
0x0800076e in HAL_GPIO_ReadPin (GPIOx=0x40020000, GPIO_Pin=1) at
..\Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c:392
392 if ((GPIOx->IDR
& GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
(gdb) c
Continuing.
Program received signal SIGINT, Interrupt.
0x08000764 in HAL_GPIO_ReadPin (GPIOx=0x40020000, GPIO_Pin=1) at
..\Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c:386
386 {
(gdb) c
Continuing.
Program received signal SIGINT, Interrupt.
0x08000782 in HAL_GPIO_ReadPin (GPIOx=0x40020000, GPIO_Pin=1) at
..\Drivers\STM32L1xx_HAL_Driver\Src\stm32l1xx_hal_gpio.c:401
401 }
(gdb) disas main # disassemblování funkce main
Dump of assembler code for function main:
0x08001224 <+0>: push
{r7, lr}
0x08001226 <+2>: sub
sp, #16
0x08001228 <+4>: add
r7, sp, #0
0x0800122a <+6>: bl
0x800017c <HAL_Init>
0x0800122e <+10>: bl
0x80012a0 <SystemClock_Config>
0x08001232 <+14>: bl
0x800132c <MX_GPIO_Init>
0x08001236 <+18>: movs
r3, #97 ; 0x61
0x08001238 <+20>: strb
r3, [r7, #0]
0x0800123a <+22>: movs
r3, #98 ; 0x62
0x0800123c <+24>: strb
r3, [r7, #1]
0x0800123e <+26>: movs
r3, #99 ; 0x63
0x08001240 <+28>: strb
r3, [r7, #2]
=> 0x08001242 <+30>:
movs r3, #100 ; 0x64
0x08001244 <+32>: strb
r3, [r7, #3]
0x08001246 <+34>: movs
r3, #8
0x08001248 <+36>: str
r3, [r7, #12]
0x0800124a <+38>: b.n
0x8001260 <main+60>
0x0800124c <+40>: ldr
r3, [r7, #12]
0x0800124e <+42>: uxtb
r1, r3
0x08001250 <+44>: mov
r2, r7
0x08001252 <+46>: ldr
r3, [r7, #12]
0x08001254 <+48>: add
r3, r2
0x08001256 <+50>: mov
r2, r1
0x08001258 <+52>: strb
r2, [r3, #0]
0x0800125a <+54>: ldr
r3, [r7, #12]
0x0800125c <+56>: adds
r3, #1
0x0800125e <+58>: str
r3, [r7, #12]
0x08001260 <+60>: ldr
r3, [r7, #12]
0x08001262 <+62>: cmp
r3, #11
0x08001264 <+64>: ble.n
0x800124c <main+40>
0x08001266 <+66>: movs
r1, #1
0x08001268 <+68>: ldr
r0, [pc, #44] ; (0x8001298
<main+116>)
0x0800126a <+70>: bl
0x800075c <HAL_GPIO_ReadPin>
0x0800126e <+74>: mov
r3, r0
0x08001270 <+76>: cmp
r3, #1
0x08001272 <+78>: bne.n
0x8001266 <main+66>
0x08001274 <+80>: movs
r2, #0
0x08001276 <+82>: movs
r1, #64 ; 0x40
0x08001278 <+84>: ldr
r0, [pc, #32] ; (0x800129c
<main+120>)
0x0800127a <+86>: bl
0x800078a <HAL_GPIO_WritePin>
0x0800127e <+90>: movs
r0, #200 ; 0xc8
0x08001280 <+92>: bl
0x8000258 <HAL_Delay>
0x08001284 <+96>: movs
r2, #1
0x08001286 <+98>: movs
r1, #64 ; 0x40
0x08001288
<+100>: ldr r0, [pc, #16] ; (0x800129c <main+120>)
0x0800128a
<+102>: bl 0x800078a <HAL_GPIO_WritePin>
0x0800128e
<+106>: movs r0, #200 ; 0xc8
--Type <RET> for more, q to quit, c to continue without
paging--
0x08001290
<+108>: bl 0x8000258 <HAL_Delay>
0x08001294
<+112>: b.n 0x8001266 <main+66>
0x08001296
<+114>: nop
0x08001298
<+116>: movs r0, r0
0x0800129a
<+118>: ands r2, r0
0x0800129c
<+120>: lsls r0, r0, #16
0x0800129e
<+122>: ands r2, r0
End of assembler dump.
(gdb) jump *0x80000 # spuštění kódu od adresy 0x80000
Continuing at 0x80000.
(gdb) i b # výpis aktivních breakpointů
Num Type Disp Enb Address What
1 breakpoint keep y
0x08001236 in main at ..\Src\main.c:93
breakpoint already hit
1 time
2 breakpoint keep y
0x08001242 in main at ..\Src\main.c:97
breakpoint already hit
1 time
(gdb) c
Continuing.
Program received signal SIGINT, Interrupt.
0x08001270 in main () at ..\Src\main.c:110
110 /* USER CODE END
WHILE */
(gdb) q
A debugging session is active.
Inferior 1 [Remote
target] will be detached.
Quit anyway? (y or n) y
Další zajímavostí je možnost tvorby vlastního skriptu:
(gdb) define hexdump
Type commands for definition of "hexdump".
End with a line saying just "end".
>dump binary memory dump.bin $arg0 $arg0+$arg1
>shell hexdump dump.bin -C
>end
(gdb)
(gdb) hexdump 0x80000 0x100
00000000 a1 00 38 d5 21 04 40 92 61 00 00 b4 5f 20 03 d5 |..8.!.@.a..._ ..|
00000010 ff ff ff 17 61 01 00 58 3f 00 00 91 61 01 00 58 |....a..X?...a..X|
00000020 e2 00 00 18 82 00 00 34 3f 84 00 f8 42 04 00 51 |.......4?...B..Q|
00000030 a2 ff ff 35 07 00 00 94 f5 ff ff 17 02 00 00 00 |...5............|
00000040 00 00 08 00 00 00 00 00 60 02 08 00 00 00 00 00 |........`.......|
00000050 fd 7b bf a9 fd 03 00 91 08 00 00 94 00 00 00 90 |.{..............|
00000060 00 a0 08 91 5b 00 00 94 00 00 00 90 00 80 09 91 |....[...........|
00000070 58 00 00 94 00 00 00 14 f3 0f 1f f8 80 00 8a d2 |X...............|
00000080 20 e4 a7 f2 01 00 40 b9 80 00 8a d2 20 e4 a7 f2 | .....@..... ...|
00000090 21 00 00 32 01 00 00 b9 00 0c 8a d2 20 e4 a7 f2 |!..2........ ...|
000000a0 1f 00 00 b9 80 09 8a d2 20 e4 a7 f2 61 00 80 52 |........ ...a..R|
000000b0 01 00 00 b9 00 0a 8a d2 20 e4 a7 f2 1f 00 00 b9 |........ .......|
000000c0 80 08 8a d2 20 e4 a7 f2 1f 00 00 b9 00 09 8a d2 |.... ...........|
000000d0 20 e4 a7 f2 c1 18 80 52 01 00 00 b9 00 0d 8a d2 | ......R........|
000000e0 20 e4 a7 f2 c1 21 80 52 01 00 00 b9 80 00 80 d2 | ....!.R........|
000000f0 00 e4 a7 f2 13 00 40 b9 73 66 0e 12 00 00 84 52 |......@.sf.....R|
00000100
https://stackoverflow.com/questions/9233095/memory-dump-formatted-like-xxd-from-gdb
