[Qemu-devel] setting MIPS gdb breakpoints have wrong offsets

[Dirk Behme <dirk.behme@googlemail.com>]

Hi,

I just tried to debug some simple MIPS code using 
qemu-system-mipsel by setting some breakpoints. If I use 
gdb's break command with symbol names the breakpoints are 
set at offsets and therefore they are never hit.

Please find an example below. I'd like to stop the program 
if I get an interrupt, everything looks okay. But break 
command sets breakpoint at 0xbfc00384 instead of 0xbfc00380. 
Is this a bug or feature? I use qemu-system-mipsel with some 
of the pending MIPS patches applied locally. If this is a 
bug, can anybody else reproduce this? Any idea?

Best regards

Dirk

(gdb) info address exception
Symbol "exception" is at 0xbfc00380.
(gdb) list exception
158     .end cache_miss
159
160     .org 0x380
161     .ent exception
162     exception:
163             j       exception_handler
164             nop
165     .end exception
166
167     /****************************************************
(gdb) x/2i 0xbfc00380
0xbfc00380 <exception>: b       0xbfc0046c <exception_handler>
0xbfc00384 <exception+4>:       nop
(gdb) break exception
Breakpoint 1 at 0xbfc00384: file crt0.S, line 163.
(gdb)