Linux下进程崩溃时定位源代码位置

gcc编译器的默认选项设置：

gcc -dumpspecs

gdb 调试打印完整字符串

如何在调试内核时，同时可以调试应用程序的做法：

(cskygdb) c

Continuing.

^C

Program received signal SIGINT, Interrupt.

default_idle () at arch/csky/kernel/process.c:83

83		__asm__ __volatile__(

(cskygdb) hb *0x00065e34           ==》对应应用反汇编处的地址

Hardware assisted breakpoint 1 at 0x65e34

(cskygdb) c

Continuing.

Program received signal SIGTRAP, Trace/breakpoint trap.

0x00065e36 in ?? ()

(cskygdb) disa

disable      disassemble

(cskygdb) disa

disable      disassemble

(cskygdb) disassemble

No function contains program counter for selected frame.

(cskygdb) disassemble $pc,$pc+30    ==》确认地址是否跟反汇编处的地址一样

Dump of assembler code from 0x65e36 to 0x65e54:

=> 0x00065e36:	st	r15, (r0, 24)

   0x00065e38:	st	r8, (r0, 28)

   0x00065e3a:	mov	r8, r0

   0x00065e3c:	st	r2, (r8, 8)

   0x00065e3e:	st	r3, (r8, 12)

   0x00065e40:	st	r4, (r8, 16)

   0x00065e42:	bmaski	r7, 0

   0x00065e44:	st	r7, (r8, 0)

   0x00065e46:	ld	r7, (r8, 12)

   0x00065e48:	bmaski	r6, 8

   0x00065e4a:	andn	r7, r7, r6

   0x00065e4c:	cmpnei	r7, 0

   0x00065e4e:	bt	0x65e5c

   0x00065e50:	ld	r2, (r8, 8)

   0x00065e52:	ld	r3, (r8, 12)

End of assembler dump.

(cskygdb) add-symbol-file /home/yingc/nfs/dvb/out.elf 0x00080e0  ==》0x00080e0是text段的地址

add symbol table from file "/home/yingc/nfs/dvb/out.elf" at

	.text_addr = 0x80e0

(y or n) y

Reading symbols from /home/yingc/nfs/dvb/out.elf...done.

(cskygdb) si

\0x00065e38	23	{

(cskygdb) l

18

19	#include "module/app_ioctl.h"

20	//#include "module/app_ca_manager.h"

21

22	status_t app_ioctl(uint32_t id, uint32_t cmd, void * params)

23	{

24	    status_t ret = GXCORE_ERROR;

25	    switch (cmd & (~0xff))

26	    {

27	        case APP_FRONTEND_BASE:

(cskygdb) n

\yingc@yingc:~/work/goxceed-dvbs-hd/test/solution/output$ csky-elf-readelf -S out.elf 
There are 28 section headers, starting at offset 0xa84da0:

Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            00000000 000000 000000 00      0   0  0
  [ 1] .init             PROGBITS        000080b4 0000b4 000022 00  AX  0   0  4
  [ 2] .text             PROGBITS        000080e0 0000e0 2f779a 00  AX  0   0 16
  [ 3] .fini             PROGBITS        002ff87c 2f787c 000016 00  AX  0   0  4
  [ 4] .rodata           PROGBITS        002ff8a0 2f78a0 071b60 00   A  0   0 16
  [ 5] .eh_frame         PROGBITS        00371400 369400 0013a8 00   A  0   0  4
  [ 6] .tdata            PROGBITS        003737a8 36a7a8 000004 00 WAT  0   0  4
  [ 7] .tbss             NOBITS          003737ac 36a7ac 000008 00 WAT  0   0  4
  [ 8] .ctors            PROGBITS        003737ac 36a7ac 000008 00  WA  0   0  4
  [ 9] .dtors            PROGBITS        003737b4 36a7b4 000008 00  WA  0   0  4
  [10] .jcr              PROGBITS        003737bc 36a7bc 000004 00  WA  0   0  4
  [11] .got              PROGBITS        003737c0 36a7c0 0000c4 04  WA  0   0  4
  [12] .data             PROGBITS        00373888 36a888 04a8f8 00  WA  0   0  8
  [13] .bss              NOBITS          003be180 3b5180 05a4cc 00  WA  0   0  8
  [14] .comment          PROGBITS        00000000 3b5180 000082 01  MS  0   0  1
  [15] .debug_aranges    PROGBITS        00000000 3b5202 008558 00      0   0  1
  [16] .debug_pubnames   PROGBITS        00000000 3bd75a 01cd87 00      0   0  1
  [17] .debug_info       PROGBITS        00000000 3da4e1 3b54ec 00      0   0  1
  [18] .debug_abbrev     PROGBITS        00000000 78f9cd 03ddac 00      0   0  1
  [19] .debug_line       PROGBITS        00000000 7cd779 19ac68 00      0   0  1
  [20] .debug_frame      PROGBITS        00000000 9683e4 043dc0 00      0   0  4
  [21] .debug_str        PROGBITS        00000000 9ac1a4 06262a 01  MS  0   0  1
  [22] .debug_loc        PROGBITS        00000000 a0e7ce 00e472 00      0   0  1
  [23] .debug_pubtypes   PROGBITS        00000000 a1cc40 061f78 00      0   0  1
  [24] .debug_ranges     PROGBITS        00000000 a7ebb8 0060e8 00      0   0  1
  [25] .shstrtab         STRTAB          00000000 a84ca0 0000fe 00      0   0  1
  [26] .symtab           SYMTAB          00000000 a85200 034710 10     27 7115  4
  [27] .strtab           STRTAB          00000000 ab9910 03845b 00      0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)

259129 00065e34 <app_ioctl>:
259130 
259131 #include "module/app_ioctl.h"
259132 //#include "module/app_ca_manager.h"
259133 
259134 status_t app_ioctl(uint32_t id, uint32_t cmd, void * params)
259135 {
259136    65e34:▸  25f0      ▸ subi▸   r0, r0, 32
259137    65e36:▸  9f60      ▸ st▸ r15, (r0, 24)
259138    65e38:▸  9870      ▸ st▸ r8, (r0, 28)
259139    65e3a:▸  1208      ▸ mov▸r8, r0
259140    65e3c:▸  9228      ▸ st▸ r2, (r8, 8)
259141    65e3e:▸  9338      ▸ st▸ r3, (r8, 12)
259142    65e40:▸  9448      ▸ st▸ r4, (r8, 16)
259143     status_t ret = GXCORE_ERROR;
259144    65e42:▸  2c07      ▸ bmaski▸ r7, 0
259145    65e44:▸  9708      ▸ st▸ r7, (r8, 0)
259146     switch (cmd & (~0xff))
259147    65e46:▸  8738      ▸ ld▸ r7, (r8, 12)
259148    65e48:▸  2c86      ▸ bmaski▸ r6, 8
259149    65e4a:▸  1f67      ▸ andn▸   r7, r7, r6
259150    65e4c:▸  2a07      ▸ cmpnei▸ r7, 0
259151    65e4e:▸  e006      ▸ bt▸ 0x65e5c
259152     {
259153         case APP_FRONTEND_BASE:
259154             ret = nim_ioctl(id, cmd, params);

注意：hb 的个数有限制，即使disable的话，也可能会不响应下一个
Unable to handle kernel paging request at virtual address 00000000, epc == 90164fc4
。。。。。。
[   54.940000] CURRENT PROCESS:

[   54.940000]

[   54.950000] COMM=out.elf PID=922

[   54.950000] TEXT=00008000-0029e630 DATA=0029f630-0031d180 BSS=0031d180-0041e000

[   54.960000] USER-STACK=7faa2e80  KERNEL-STACK=904ef560

[   54.960000]

[   54.960000] PC: 0x90164fc4

[   54.970000] PSR: 0x8f150141

[   54.970000] r1:  0x00000030    syscallr2: 0x0000e190    r2: 0x0000e190    r3: 0x00000000

[   54.980000] r4:  0x9025908c    r5:  0xe470e190    r6:  0xe40e0020    r7:  0x9023b08c

[   54.990000] r8:  0x00000000    r9:  0x92cb4000    r10: 0x00001101    r11: 0x00000000

[   54.990000] r12: 0x902e6ef4    r13: 0x00043800    r14: 0x9023b08c    r15: 0x90162154

[   55.000000]

[   55.000000] CODE:

[   55.010000] 90164fa4: 97361c47 75737e87 1ce41254 f00e12e7

[   55.010000] 90164fb4: 3d06c607 1e26c217 3d05c527 1e25c237

[   55.020000] 90164fc4: 12359503 96052035 20732077 e7f00f47

[   55.020000] 90164fd4: 12236002 77637f7c 747b8607 75661c46

[   55.030000]

[   55.030000] KERNEL STACK:

[   55.030000] 92cb5dc0: 00000000 92cb5e54 000000a0 00000000

[   55.040000] 92cb5dd0: 0000011c 0000003b 902dd310 90029f84 
Unable to handle kernel paging request at virtual address 00000000, epc == c07055f0

[root@gx3201 /]# lsmod

ohci_hcd 15264 0 - Live 0xc0074000

ehci_hcd 25520 0 - Live 0xc006c000

av 1121948 2 - Live 0xc06e2000

(cskygdb) p /x 0xc07055f0-0xc06e2000

$2 = 0x235f0

av.ko 反汇编：

105593 RetCode VPU_Init(PhysicalAddress workBuf,VirtualAddress Virtual_addr)

105594    235d6:   7547        lrw r5, 0x1E000

105595    235d8:   1254        mov r4, r5

105596    235da:   1ce4        addu    r4, r4, r14

105597     disFlagRegAddr[0] = BIT_FRM_DIS_FLG_0;

105598     disFlagRegAddr[1] = BIT_FRM_DIS_FLG_1;

105599     disFlagRegAddr[2] = BIT_FRM_DIS_FLG_2;

105600     disFlagRegAddr[3] = BIT_FRM_DIS_FLG_3;

105601

105602     for (i = 0; i < sizeof(bit_code) / sizeof(bit_code[0]); i += 4)

105603    235dc:   12e7        mov r7, r14

105604    235de:   f00e        br  0x235fc

105605     {

105606         dataH = (bit_code[i+0] << 16) | bit_code[i+1];

105607    235e0:   c607        ldh r6, (r7, 0)

105608    235e2:   3d06        lsli    r6, r6, 16

105609    235e4:   c217        ldh r2, (r7, 2)

105610    235e6:   1e26        or  r6, r6, r2

105611         dataL = (bit_code[i+2] << 16) | bit_code[i+3];

105612    235e8:   c527        ldh r5, (r7, 4)

105613    235ea:   3d05        lsli    r5, r5, 16

105614    235ec:   c237        ldh r2, (r7, 6)

105615    235ee:   1e25        or  r5, r5, r2

105616         VpuWriteMem(vir_code_buf+i*2, dataL);

105617    235f0:   9503        st  r5, (r3, 0)

105618 int VPU_IsBusy()

105619 {

105620     return VpuReadReg(BIT_BUSY_FLAG) != 0;

105621 }

105622 


  79     for (i = 0; i < sizeof(bit_code) / sizeof(bit_code[0]); i += 4)

  80     {

  81         dataH = (bit_code[i+0] << 16) | bit_code[i+1];

  82         dataL = (bit_code[i+2] << 16) | bit_code[i+3];

  83         VpuWriteMem(vir_code_buf+i*2, dataL);

  84         VpuWriteMem(vir_code_buf+i*2+4, dataH);

  85     }






gdb dump内存中的数据及查看代码段是否被冲：




(cskygdb) dump memory 111.yuv 0x94f54cc8 0x94f54cc8 + 0x450*200

(cskygdb) p 0x450

$7 = 1104

display -size 1104x200 111.yuv

Loading section .text, size 0x64b628 lma 0x90000000
    section progress: 100.0%, total progress: 100.0% 
Loading section .devtab, size 0xa28 lma 0x9064b628
    section progress: 100.0%, total progress: 100.0% 
Start address 0x90000458, load size 6602832
Transfer rate: 853 KB/sec, 4093 bytes/write.
0x90000458 in __reset_vector ()
(cskygdb) 46edfc
Undefined command: "46edfc".  Try "help".
(cskygdb) dump binary memory text.ok 0x90000000 0x90000000+0x46edfc
(cskygdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x900e99ce in idle_thread_main (data=0)
    at /home/yingc/work/gitcode/v1.9-dev/gxcoreapi/ecos3.0/packages/kernel/v3_0/src/common/thread.cxx:1244
1244            HAL_IDLE_THREAD_ACTION(idle_thread_loops[CYG_KERNEL_CPU_THIS()]);
(cskygdb) dump binary memory text1.ok 0x90000000 0x90000000+0x46edfc
(cskygdb) c

 21 SECTIONS
 22 {
 23 
 24     .text : {
 25             _start_text = .;
 26             . = ALIGN (0x4);
 27         . = ALIGN (0x4); *(.rel.*) *(.rela.*)
 28         . = ALIGN (0x4); _stext = .; _etext = .; _ftext = . ; *(.text*) *(.stub)
 29 
 30         . = ALIGN (0x4);
 31                                 _sdata = . ;
 32                                 __data_start = . ;
 33                                 data_start = . ;
 34                                 *(.got_plt)
 35                                 *(.got)
 36                                 FILL(0);
 37                                 . = ALIGN(0x20) ;
 38                                 LONG(-1)
 39                 . = ALIGN(0x20) ;
 40                 *(.rodata)
 41                 *(.rodata*)
 42                 *(.rodata1)
 43                 *(.rodata.*)
 44                 *(.rodata.str1.4)
 45                 *(.gnu.linkonce.r*)
 46                 *(.data)
 47                 *(.data*)

16434 9046ec14 T yaffs_ECCCalculateOther
16435 9046ecbc T yaffs_ECCCorrectOther
16436 9046edfc T __data_start
16437 9046edfc T _sdata
16438 9046edfc T data_start
16439 90473fc4 t __FUNCTION__.11312
16440 90473fd8 t __FUNCTION__.11303
16441 90473fec t __FUNCTION__.11293

ecos3.0/packages/hal/gx/ckmmu/ck610m/var/v3_0/src/ckmmu_ck610m.ld





gdb调试内核.gdbinit文件的写法：




  1 tar jtag jtag://127.0.1.1:1025

  2 handle SIG32 nostop noprint

  3 handle SIG33 nostop noprint

  4 #set $cr18=0x7d

  5 #set *0x0030a178 |= 0x7

  6 #set *0x0030a178 |= 0x3

  7 #set *0x0030a178 |= (1<<4)|(1<<5)

  8

  9 load

 10 #b main

 11 #display /i $pc

 12 #b IMG.c:1244

 13 #b widget.c:968

 14

 15 #c

 16 #q





编译中间结果：




 2155  make ARCH=csky CROSS_COMPILE=csky-linux- uImage -j4

 2156  make ARCH=csky CROSS_COMPILE=csky-linux- uImage -j4 V=1

 2157  csky-linux-gcc -Wp,-MD,net/sunrpc/.rpcb_clnt.o.d  -nostdinc -isystem /usr/local/csky-linux/bin/../lib/gcc/csky-linux/4.5.1/include -D__KERNEL__ -Iinclude  -I/home/yingc/gcyin/vgitcode/3211-sync/linux-2.6.27.55/arch/csky/include -include include/linux/autoconf.h -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O0 -fsigned-char -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O0 -I -pipe -DNO_FPU -D__ELF__ -DMAGIC_ROM_PTR -D__linux__ -DNO_TEXT_SECTIONS -Wa,-no-jsri2bsr,-mcpu=ck610f -Iarch/csky/gx3xxx/include -Wframe-larger-than=1024 -fno-stack-protector -fomit-frame-pointer -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(rpcb_clnt)"  -D"KBUILD_MODNAME=KBUILD_STR(sunrpc)" -c -o net/sunrpc/rpcb_clnt.o net/sunrpc/rpcb_clnt.c

 2158  csky-linux-gcc -Wp,-MD,net/sunrpc/.rpcb_clnt.o.d  -nostdinc -isystem /usr/local/csky-linux/bin/../lib/gcc/csky-linux/4.5.1/include -D__KERNEL__ -Iinclude  -I/home/yingc/gcyin/vgitcode/3211-sync/linux-2.6.27.55/arch/csky/include -include include/linux/autoconf.h -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O0 -fsigned-char -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O0 -I -pipe -DNO_FPU -D__ELF__ -DMAGIC_ROM_PTR -D__linux__ -DNO_TEXT_SECTIONS -Wa,-no-jsri2bsr,-mcpu=ck610f -Iarch/csky/gx3xxx/include -Wframe-larger-than=1024 -fno-stack-protector -fomit-frame-pointer -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(rpcb_clnt)"  -D"KBUILD_MODNAME=KBUILD_STR(sunrpc)" -c -o net/sunrpc/rpcb_clnt.o net/sunrpc/rpcb_clnt.c --save-temps

 2159  vi rpcb_clnt.i

 2160  vi net/sunrpc/rpcb_clnt.c +122 rpcb_clnt.i -O

 2161  csky-linux-gcc -Wp,-MD,net/sunrpc/.rpcb_clnt.o.d  -nostdinc -isystem /usr/local/csky-linux/bin/../lib/gcc/csky-linux/4.5.1/include -D__KERNEL__ -Iinclude  -I/home/yingc/gcyin/vgitcode/3211-sync/linux-2.6.27.55/arch/csky/include -include include/linux/autoconf.h -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O0 -fsigned-char -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -fno-delete-null-pointer-checks -O2 -I -pipe -DNO_FPU -D__ELF__ -DMAGIC_ROM_PTR -D__linux__ -DNO_TEXT_SECTIONS -Wa,-no-jsri2bsr,-mcpu=ck610f -Iarch/csky/gx3xxx/include -Wframe-larger-than=1024 -fno-stack-protector -fomit-frame-pointer -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(rpcb_clnt)"  -D"KBUILD_MODNAME=KBUILD_STR(sunrpc)" -c -o net/sunrpc/rpcb_clnt.o net/sunrpc/rpcb_clnt.c --save-temps

 2162  vi rpcb_clnt.i

 2163  history





linux下用GDB调试可加载模块


http://blog.csdn.net/justlinux2010/article/details/8508333


[root@gx6602 /]# lsmod
ohci_hcd 19028 0 - Live 0xc009e000
ehci_hcd 33276 0 - Live 0xc00b9000
fe 221368 0 - Live 0xc03c7000
av 1933852 0 - Live 0xc0b7f000


yingc@yingc:~/nfs/lib/modules/2.6.27.55$ csky-linux-objdump -h av.ko


av.ko:     file format elf32-csky-little


Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .note.gnu.build-id 00000024  00000000  00000000  00000034  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  1 .text         000c1824  00000000  00000000    2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  2 .init.text    000001e8  00000000  00000000  000c187c  2**2


(cskygdb) add-symbol-file ~/nfs/lib/modules/2.6.27.55/av.ko
The address where /home/yingc/nfs/lib/modules/2.6.27.55/av.ko has been loaded is missing
(cskygdb) add-symbol-file ~/nfs/lib/modules/2.6.27.55/av.ko 0xc0b7f058
add symbol table from file "/home/yingc/nfs/lib/modules/2.6.27.55/av.ko" at
    .text_addr = 0xc0b7f058
(y or n) y
Reading symbols from /home/yingc/nfs/lib/modules/2.6.27.55/av.ko...done.
(cskygdb) b gx3201_hdmi_open




yingc@yingc:~/tmp$ csky-linux-gcc -O0 -g -I/usr/local/csky-linux -I/usr/local/csky-linux/csky-linux -I/usr/local/csky-linux/csky-linux/libc/usr/include  -L/usr/local/csky-linux/csky-linux/lib/libstdc++.a  thread.c -L/usr/local/csky-linux/libc/usr/lib/libpthread.a  -static

/tmp/ccCOd8La.o: In function `main':

/home/yingc/tmp/thread.c:31: undefined reference to `pthread_attr_init'

/home/yingc/tmp/thread.c:33: undefined reference to `pthread_attr_setstacksize'

/home/yingc/tmp/thread.c:35: undefined reference to `pthread_create'

/home/yingc/tmp/thread.c:41: undefined reference to `pthread_attr_destroy'

/tmp/ccCOd8La.o: In function `main':

thread.c:(.text+0x90): undefined reference to `pthread_attr_init'

thread.c:(.text+0x94): undefined reference to `pthread_attr_setstacksize'

thread.c:(.text+0x9c): undefined reference to `pthread_create'

thread.c:(.text+0xa8): undefined reference to `pthread_attr_destroy'

collect2: ld returned 1 exit status

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$ csky-linux-gcc -O0 -g -I/usr/local/csky-linux -I/usr/local/csky-linux/csky-linux -I/usr/local/csky-linux/csky-linux/libc/usr/include  -L/usr/local/csky-linux/csky-linux/lib/libstdc++.a  thread.c -L/usr/local/csky-linux/libc/usr/lib lpthread  -static

csky-linux-gcc: lpthread: 没有那个文件或目录

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$ csky-linux-gcc -O0 -g -I/usr/local/csky-linux -I/usr/local/csky-linux/csky-linux -I/usr/local/csky-linux/csky-linux/libc/usr/include  -L/usr/local/csky-linux/csky-linux/lib/libstdc++.a  thread.c -L/usr/local/csky-linux/libc/usr/lib -lpthread  -static

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$

yingc@yingc:~/tmp$ csky-linux-gcc -O0 -g -I/usr/local/csky-linux -I/usr/local/csky-linux/csky-linux -I/usr/local/csky-linux/csky-linux/libc/usr/include  -L/usr/local/csky-linux/csky-linux/lib/libstdc++.a  thread.c -L/usr/local/csky-linux/libc/usr/lib -lpthread  -static





hello world的本质-----预编译,编译，汇编




gcc -E hello.c -o hello.i

这个命令就是用来生成预处理后的文件的。
生成汇编代码文件的命令
gcc -S hello.i -o hello.s
汇编命令
gcc -c hello.s -o hello.o




aa
												


											
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