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

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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
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@ -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;
}