我有一个来自嵌入式SH3
linux设备的核心文件,以及我主机linux中的交叉编译环境(sh3-linux-gdb)的gdb.
但我在使用gdb加载核心文件时遇到问题：
$sh3-linux-gdb ./myprogram ./core GNU gdb 6.3 copyright 2004 Free Software Foundation,Inc. ... This GDB was configured as "--host=i386-pc-linux-gnu --target=sh3-linux"... GDB can't read core files on this machine. (gdb)
为什么它无法读取核心文件？
有没有办法从目标系统读取核心文件到交叉gdb？
目标机器(SH3-linux)中有gdbserver,但不是gdb本身.
我能用gdbserver和sh3-linux-gdb对目标机器的进程进行运行时调试,所以应该正确编译sh3-linux-gdb.
编辑：
请求readelf转储：
[build]$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)
解决方法
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
它可能是旧gdb http://sourceware.org/bugzilla/show_bug.cgi?id=9542中的一个错误 – 所以尝试更新的gdb(7).
也可能以不支持的格式转储核心.什么是目标的操作系统,版本？
你可以发布输出或readelf -a核心？
