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 Post subject: 常用的gdb指令
PostPosted: Tue Nov 22, 2011 6:48 pm 
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Joined: Fri Mar 04, 2011 9:36 pm
Posts: 500
記一下常用的gdb指令如下。下面是我早上debug用。

hylai@APC002 /cygdrive/c/mycode/patch
$ nds32le-elf-gdb.exe
GNU gdb (2011-07-29) 6.8
Copyright (C) 2008 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-mingw32 --target=nds32le-elf".
source E:\Andestech\AndeSight200MCU\toolchains\nds32le-elf-newlib-v2\bin\.Andesg
dbinit
(gdb) target remote:9900
Remote debugging using :9900
0x00005b68 in ?? ()
core0(gdb) file mainprog.adx
A program is being debugged already.
Are you sure you want to change the file? (y or n) y
Reading symbols from c:\mycode\patch\mainprog.adx...done.
core0(gdb) lo
Loading section .nds32_init, size 0x4 lma 0x500000
Loading section .init, size 0xc lma 0x500004
Loading section .text, size 0x95dc lma 0x500010
Loading section .rodata, size 0x338 lma 0x5095f0
Loading section .eh_frame, size 0x34 lma 0x509948
Loading section .ctors, size 0x4 lma 0x50997c
Loading section .dtors, size 0x4 lma 0x509980
Loading section .jcr, size 0x4 lma 0x509984
Loading section .data, size 0x870 lma 0x509988
Loading section .sdata_w, size 0x2c lma 0x50a1f8
Loading section .sdata_b, size 0x3 lma 0x50a224
Loading section FUNC_TABLE, size 0xc lma 0x510000
Start address 0x500010, load size 41487
Transfer rate: 519 KB/sec, 2963 bytes/write.
core0(gdb) file patch.adx
A program is being debugged already.
Are you sure you want to change the file? (y or n) y

Load new symbol table from "c:\mycode\patch\patch.adx"? (y or n) y
Reading symbols from c:\mycode\patch\patch.adx...done.
附註...這邊load code 2次是因為我寫的code是ROM加上ROM的patch。
所以load code2次。

core0(gdb) loLoading section FUNC_TABLE, size 0xc lma 0x510000
Loading section FUNC_PATCH, size 0x28 lma 0x510020
Start address 0x500010, load size 52
Transfer rate: 416 bits in <1 sec, 26 bytes/write.
core0(gdb) b main
Breakpoint 1 at 0x50017c
core0(gdb) disas main
No function contains specified address.
core0(gdb) disass main
No function contains specified address.
core0(gdb) c
Continuing.

Breakpoint 1, 0x0050017c in ?? ()
core0(gdb) disass $pc
No function contains specified address.
core0(gdb) disass 0x0050017c
No function contains specified address.
core0(gdb) disass *0x0050017c
No function contains specified address.
core0(gdb) x/10i 0x0050017c0x50017c: sethi $r0,#1296
0x500180: ori $r0,$r0,#0x0
0x500184: lwi $r1,[$r0+#0]
0x500188: movi $r0,#30
0x50018c: jral $lp,$r1
0x500190: mov55 $r1,$r0
0x500192: sethi $r0,#1289
0x500196: ori $r0,$r0,#0x5f0
0x50019a: sethi $r15,#1280
0x50019e: ori $r15,$r15,#0x204
core0(gdb) si
0x00500180 in ?? ()
core0(gdb) si
0x00500184 in ?? ()
core0(gdb) si
0x00500188 in ?? ()
core0(gdb) si
0x0050018c in ?? ()
core0(gdb) si
mul2 (x=0) at ../patchprog.c:22
22 int mul2(int x){
core0(gdb) disass $pc
Dump of assembler code for function mul2:
0x00510020 <mul2+0>: smw.adm $sp,[$sp],$sp,#0x8
0x00510024 <mul2+4>: addi $fp,$sp,#0
0x00510028 <mul2+8>: addi $sp,$sp,#-12
0x0051002c <mul2+12>: swi $r0,[$fp+#-8]
0x00510030 <mul2+16>: lwi $r1,[$fp+#-8]
0x00510034 <mul2+20>: movi $r0,#200
0x00510038 <mul2+24>: mul $r0,$r1,$r0
0x0051003c <mul2+28>: addi $sp,$fp,#0
0x00510040 <mul2+32>: lmw.bim $sp,[$sp],$sp,#0x8
0x00510044 <mul2+36>: ret $lp
End of assembler dump.
core0(gdb) si
0x00510024 22 int mul2(int x){
core0(gdb) si
0x00510028 22 int mul2(int x){
core0(gdb) si
0x0051002c 22 int mul2(int x){
core0(gdb) si
23 return x*200;
core0(gdb) si
0x00510034 23 return x*200;
core0(gdb) si
0x00510038 23 return x*200;
core0(gdb) si
24 }
core0(gdb) si
0x00510040 24 }
core0(gdb) si
0x00510044 in mul2 (x=50331644) at ../patchprog.c:24
24 }
core0(gdb) si
0x00500190 in ?? ()
core0(gdb) x/10i 0x500190
0x500190: mov55 $r1,$r0
0x500192: sethi $r0,#1289
0x500196: ori $r0,$r0,#0x5f0
0x50019a: sethi $r15,#1280
0x50019e: ori $r15,$r15,#0x204
0x5001a2: jral5 $r15
0x5001a4: sethi $r0,#1296
0x5001a8: ori $r0,$r0,#0x0
0x5001ac: lwi $r1,[$r0+#4]
0x5001b0: movi $r0,#30
core0(gdb) si
0x00500192 in ?? ()
core0(gdb) si
0x00500196 in ?? ()
core0(gdb) si
0x0050019a in ?? ()
core0(gdb) si
0x0050019e in ?? ()
core0(gdb) si
0x005001a2 in ?? ()
core0(gdb) si
0x00500204 in ?? ()
core0(gdb) x/10i 0x500204
0x500204: smw.adm $r1,[$sp],$r5,#0x0
0x500208: smw.adm $sp,[$sp],$sp,#0x2
0x50020c: addi $sp,$sp,#-8
0x500210: sethi $r1,#1290
0x500214: lwi $r1,[$r1+#504]
0x500218: mov55 $r2,$r0
0x50021a: mov55 $r0,$r1
0x50021c: lwi $r1,[$r1+#8]
0x500220: addi $r3,$sp,#12
0x500224: swi $r3,[$sp+#4]
core0(gdb) si
0x00500208 in ?? ()
core0(gdb) si
0x0050020c in ?? ()
core0(gdb) si
0x00500210 in ?? ()
core0(gdb) si
0x00500214 in ?? ()
core0(gdb) si
0x00500218 in ?? ()
core0(gdb) si
0x0050021a in ?? ()
core0(gdb) si
0x0050021c in ?? ()
core0(gdb) si
0x00500220 in ?? ()
core0(gdb) si
0x00500224 in ?? ()
core0(gdb) x/10i 0x500224
0x500224: swi $r3,[$sp+#4]
0x500228: sethi $r15,#1280
0x50022c: ori $r15,$r15,#0x270
0x500230: jral $lp,$r15
0x500234: addi10.sp #8
0x500236: lmw.bim $sp,[$sp],$sp,#0x2
0x50023a: addi10.sp #20
0x50023c: ret5 $lp
0x50023e: srli45 $r0,#0x0
0x500240: smw.adm $r2,[$sp],$r5,#0x0
core0(gdb) s
Cannot find bounds of current function
core0(gdb) si
0x00500228 in ?? ()
core0(gdb) si
0x0050022c in ?? ()
core0(gdb) si
0x00500230 in ?? ()
core0(gdb) b *0x500234
Breakpoint 2 at 0x500234
core0(gdb) c
Continuing.

Breakpoint 2, 0x00500234 in ?? ()
core0(gdb) si
0x00500236 in ?? ()
core0(gdb) si
0x0050023a in ?? ()
core0(gdb) si
0x0050023c in ?? ()
core0(gdb) si
0x005001a4 in ?? ()
core0(gdb) b *0x5001b8
Breakpoint 3 at 0x5001b8
core0(gdb) b *0x5001cc
Breakpoint 4 at 0x5001cc
core0(gdb) b *0x5001e0
Breakpoint 5 at 0x5001e0
core0(gdb) b *0x5001f4
Breakpoint 6 at 0x5001f4
core0(gdb) c
Continuing.

Breakpoint 3, 0x005001b8 in ?? ()
core0(gdb) c
Continuing.

Breakpoint 2, 0x00500234 in ?? ()
core0(gdb) c
Continuing.

Breakpoint 4, 0x005001cc in ?? ()
core0(gdb) c
Continuing.

Breakpoint 5, 0x005001e0 in ?? ()
core0(gdb) c
Continuing.

Breakpoint 2, 0x00500234 in ?? ()
core0(gdb) c
Continuing.

Breakpoint 6, 0x005001f4 in ?? ()
core0(gdb)


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 Post subject: Re: 常用的gdb指令
PostPosted: Wed Nov 23, 2011 10:56 am 
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Joined: Fri Mar 04, 2011 9:36 pm
Posts: 500
gdb裡也可以切換工作目錄
----------------------------------------------------------------
(gdb) target remote:9900
Remote debugging using :9900
0x0001b1b6 in ?? ()
core0(gdb) cd ..
Working directory E:\Andestech\AndeSight200MCU\toolchains\nds32le-elf-newlib-v2.

core0(gdb) cd c:
Working directory C:\.
core0(gdb) cd mycode
Working directory C:\mycode.
core0(gdb) ls
Undefined command: "ls". Try "help".
core0(gdb) cd patch/
Working directory C:\mycode\patch.
core0(gdb) file patch.adx


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