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Blackfin arch: fix bug when sending signals with the wrong PC, cause gdb get confused 

We need to send signals with the proper PC, or gdb gets
confused, and lots of tests fail. This should fix that.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Robin Getz 2007-11-21 16:38:05 +08:00 committed by Bryan Wu
parent 569a50ca3f
commit fb322915a0
1 changed files with 8 additions and 6 deletions
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14
arch/blackfin/kernel/traps.c
View File

@ -463,18 +463,20 @@ asmlinkage void trap_c(struct pt_regs *fp)
#endif
panic("Kernel exception");
}
/* Ensure that bad return addresses don't end up in an infinite
* loop, due to speculative loads/reads
*/
if (trapnr == VEC_CPLB_I_M)
fp->pc = SAFE_USER_INSTRUCTION;
}
info.si_signo = sig;
info.si_errno = 0;
info.si_addr = (void *)fp->pc;
force_sig_info(sig, &info, current);
/* Ensure that bad return addresses don't end up in an infinite
* loop, due to speculative loads/reads. This needs to be done after
* the signal has been sent.
*/
if (trapnr == VEC_CPLB_I_M && sig != SIGTRAP)
fp->pc = SAFE_USER_INSTRUCTION;
trace_buffer_restore(j);
return;
}