7

我有一个core来自嵌入式 SH3 linux 设备的文件，以及我的主机 linux 中的交叉编译器环境 (sh3-linux-gdb) 的 gdb。

但我在使用 gdb 加载核心文件时遇到问题：

$ sh3-linux-gdb ./myprogram ./core
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
...
This GDB was configured as "--host=i386-pc-linux-gnu --target=sh3-linux"...
GDB can't read core files on this machine.
(gdb)

为什么它无法读取核心文件？有没有办法将核心文件从目标系统读取到交叉 gdb？

目标机器（SH3-linux）中有 gdbserver，但没有 gdb 本身。我能够使用gdbserverand对目标机器的进程进行运行时调试sh3-linux-gdb，因此sh3-linux-gdb应该正确编译。

编辑： 请求了 readelf 转储：

[build]$ sh3-linux-readelf -a core
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              CORE (Core file)
  Machine:                           Renesas / SuperH SH
  Version:                           0x1
  Entry point address:               0x0
  Start of program headers:          52 (bytes into file)
  Start of section headers:          0 (bytes into file)
  Flags:                             0x0
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         51
  Size of section headers:           0 (bytes)
  Number of section headers:         0
  Section header string table index: 0

There are no sections in this file.

There are no sections in this file.

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  NOTE           0x000694 0x00000000 0x00000000 0x00200 0x00000     0
  LOAD           0x001000 0x00400000 0x00000000 0x00000 0x01000 R E 0x1000
  ----- several boring lines removed -----
  LOAD           0x05a000 0x29952000 0x00000000 0x01000 0x01000 RW  0x1000
  LOAD           0x05b000 0x7be48000 0x00000000 0x15000 0x15000 RWE 0x1000

There is no dynamic section in this file.

There are no relocations in this file.

There are no unwind sections in this file.

No version information found in this file.

Notes at offset 0x00000694 with length 0x00000200:
  Owner         Data size       Description
  CORE          0x000000a8      NT_PRSTATUS (prstatus structure)
  CORE          0x0000007c      NT_PRPSINFO (prpsinfo structure)
  CORE          0x000000a0      NT_AUXV (auxiliary vector)
[build]$

EDIT2：与--core选项相同的问题：

$ sh3-linux-gdb ./myprogram --core=./core 
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i386-pc-linux-gnu --target=sh3-linux"...RUN GDB INIT
GDB can't read core files on this machine.
(gdb)
4

2 回答 2

1

根据http://forums.freescale.com/t5/68K-ColdFire-reg-Microprocessors/GDB-can-t-read-core-files/td-p/70181尝试

 sh3-linux-gdb ./myprogram --core=./core

这可能是旧 gdb http://sourceware.org/bugzilla/show_bug.cgi?id=9542中的错误- 所以也尝试更新的 gdb (7)。

也可能核心以不受支持的格式转储。目标的操作系统，版本是什么？

你可以发布输出或readelf -a core？

于 2011-08-23T14:45:41.680 回答
-2

可以调试您的应用程序，而不是直接使用 gdb，而是使用 gdb 服务器。您要做的第一件事是在目标系统中调用 gdbserver （您在问题中说该软件包已安装）：

gdbserver AAA.BBB.CCC.DDD:port ./myprogram

假设目标机器可以通过 IP 地址访问：AAA.BBB.CCC.DDD:port. 完成后，您可以通过指定目标远程服务器在开发机器中调用 gdb：

   % gdb ./myprogram
   % [...]
   (gdb) target remote AAA.BBB.CCC.DDD:port

请注意，目标远程服务器 IP 地址与 gdbserver 相同。

于 2011-07-21T11:14:35.293 回答