Hello
Current linux-2.6 tree panics on my dev machine
64 bit kernel, 32bit user land
CONFIG_FRAME_POINTER=y
perf timechart record &
Instant crash
Call Trace:
perf_trace_sched_switch+0xd5/0x120
schedule+0x6b5/0x860
retint_careful+0xd/0x21
RIP ffffffff81010955 perf_arch_fetch_caller_regs+0x15/0x40
CR2: 00000000d21f1422
rewind_frame_pointer() is probably wrong.
No test performed to check frame is in current stack, or
that (!user_mode_vm(regs))
static inline unsigned long rewind_frame_pointer(int n)
{
struct stack_frame *frame;
get_bp(frame);
#ifdef CONFIG_FRAME_POINTER
while (n--)
frame = frame->next_frame;
#endif
return (unsigned long)frame;
}
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