我正在尝试调试64位程序,但gdb似乎认为它有i386架构。
# file /usr/local/bin/foo
/usr/local/bin/foo: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.4.0, not stripped
# gdb --args foo bar
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 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 "x86_64-pc-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/local/bin/foo...done.
(gdb) set debug arch 1
(gdb) show debug arch
Architecture debugging is 1.
(gdb) info target
Symbols from "/usr/local/bin/foo".
Local exec file:
gdbarch_find_by_info: info.bfd_arch_info i386:x86-64
gdbarch_find_by_info: info.byte_order 1 (little)
gdbarch_find_by_info: info.osabi 5 (GNU/Linux)
gdbarch_find_by_info: info.abfd 0xaf4a90
gdbarch_find_by_info: info.tdep_info 0x0
gdbarch_find_by_info: Previous architecture 0xb05790 (i386:x86-64) selected
`/usr/local/bin/foo', file type elf64-x86-64.
Entry point: 0x419730
0x00000000004001c8 - 0x00000000004001e4 is .interp
0x00000000004001e4 - 0x0000000000400204 is .note.ABI-tag
0x0000000000400208 - 0x0000000000402560 is .hash
0x0000000000402560 - 0x0000000000409898 is .dynsym
0x0000000000409898 - 0x0000000000411188 is .dynstr
0x0000000000411188 - 0x0000000000411b22 is .gnu.version
0x0000000000411b28 - 0x0000000000411b88 is .gnu.version_r
0x0000000000411b88 - 0x00000000004181a0 is .rela.dyn
0x00000000004181a0 - 0x0000000000418e78 is .rela.plt
0x0000000000418e78 - 0x0000000000418e90 is .init
0x0000000000418e90 - 0x0000000000419730 is .plt
0x0000000000419730 - 0x00000000004ede38 is .text
0x00000000004ede38 - 0x00000000004ede46 is .fini
0x00000000004ede48 - 0x00000000004ede4c is .eh_frame
0x00000000006ee000 - 0x00000000006ee010 is .ctors
0x00000000006ee010 - 0x00000000006ee020 is .dtors
0x00000000006ee020 - 0x00000000006ee028 is .jcr
0x00000000006ee028 - 0x00000000006ee1f8 is .dynamic
0x00000000006ee1f8 - 0x00000000006f07f0 is .got
0x00000000006f07f0 - 0x00000000006f0c50 is .got.plt
0x00000000006f0c50 - 0x0000000000736c70 is .data
0x0000000000736c70 - 0x000000000073b420 is .bss
(gdb) start
Temporary breakpoint 1 at 0x419e70: file foo.lpr, line 69.
Starting program: /usr/local/bin/foo bar
warning: Selected architecture i386:x86-64 is not compatible with reported target architecture i386
gdbarch_find_by_info: info.bfd_arch_info i386:x86-64
gdbarch_find_by_info: info.byte_order 1 (little)
gdbarch_find_by_info: info.osabi 5 (GNU/Linux)
gdbarch_find_by_info: info.abfd 0xaf4a90
gdbarch_find_by_info: info.tdep_info 0x0
gdbarch_find_by_info: Target rejected architecture
gdbarch_update_p: Architecture not found
warning: Architecture rejected target-supplied description
gdbarch_find_by_info: info.bfd_arch_info i386:x86-64
gdbarch_find_by_info: info.byte_order 1 (little)
gdbarch_find_by_info: info.osabi 5 (GNU/Linux)
gdbarch_find_by_info: info.abfd 0xd6ce90
gdbarch_find_by_info: info.tdep_info 0x0
gdbarch_find_by_info: Previous architecture 0xb05790 (i386:x86-64) selected
Error in re-setting breakpoint 1: Cannot access memory at address 0x419e60
Error in re-setting breakpoint 1: Cannot access memory at address 0x419e60
process 5299 is executing new program: /usr/local/bin/foo
warning: Selected architecture i386:x86-64 is not compatible with reported target architecture i386
gdbarch_find_by_info: info.bfd_arch_info i386:x86-64
gdbarch_find_by_info: info.byte_order 1 (little)
gdbarch_find_by_info: info.osabi 5 (GNU/Linux)
gdbarch_find_by_info: info.abfd 0xb21790
gdbarch_find_by_info: info.tdep_info 0x0
gdbarch_find_by_info: Target rejected architecture
Architecture of file not recognized.
请注意警告:
warning: Selected architecture i386:x86-64 is not compatible with reported target architecture i386
然后:
gdbarch_find_by_info: Target rejected architecture
gdbarch_update_p: Architecture not found
warning: Architecture rejected target-supplied description
在gdb中,如果我输入'set architecture'并点击tab,我会看到以下内容:
(gdb) set architecture
auto i386:intel i386:x64-32:intel i386:x86-64:intel
i386 i386:x64-32 i386:x86-64 i8086
我的问题是:为什么gdb认为我的文件有i386架构,即使它显然是x86-64二进制文件,我该怎么做才能修复它?
我的程序是使用FreePascal版本2.6.0编译的。
更新: 我没有在我的Ubuntu 12.04机器上使用相同的gdb二进制文件和相同的freepascal二进制文件(带有3.2.0-31内核)的任何警告。我试图调试的服务器正在运行2.6.34.10-24内核。内核或服务器上的某些内容是否可能会影响gdb?
答案 0 :(得分:1)
你的问题从这里开始:
gdbarch_find_by_info:目标被拒绝的架构
这意味着GDB中与目标相关的代码不喜欢i386:x86-64
架构。不幸的是,没有简单的方法来告诉它不喜欢什么 - 你必须调试GDB本身才能找到它。
您可以在GDB发生故障的计算机上调试其他二进制文件(例如/bin/date
)吗?