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[MIPS] Maintain si_code field properly for FP exceptions 

The appended patch adds code to update siginfo_t's si_code field. It
fixes e.g. a floating point overflow regression in the SBCL testsuite.

Signed-off-By: Thiemo Seufer <ths@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Thiemo Seufer 2007-08-22 01:42:04 +01:00 committed by Ralf Baechle
parent 34412c7231
commit 948a34cf39
1 changed files with 18 additions and 3 deletions
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21
arch/mips/kernel/traps.c
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@ -606,6 +606,8 @@ asmlinkage void do_ov(struct pt_regs *regs)
*/ */
asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
{ {
siginfo_t info;
die_if_kernel("FP exception in kernel code", regs); die_if_kernel("FP exception in kernel code", regs);
if (fcr31 & FPU_CSR_UNI_X) { if (fcr31 & FPU_CSR_UNI_X) {
@ -641,9 +643,22 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
force_sig(sig, current); force_sig(sig, current);
return; return;
} } else if (fcr31 & FPU_CSR_INV_X)
info.si_code = FPE_FLTINV;
force_sig(SIGFPE, current); else if (fcr31 & FPU_CSR_DIV_X)
info.si_code = FPE_FLTDIV;
else if (fcr31 & FPU_CSR_OVF_X)
info.si_code = FPE_FLTOVF;
else if (fcr31 & FPU_CSR_UDF_X)
info.si_code = FPE_FLTUND;
else if (fcr31 & FPU_CSR_INE_X)
info.si_code = FPE_FLTRES;
else
info.si_code = __SI_FAULT;
info.si_signo = SIGFPE;
info.si_errno = 0;
info.si_addr = (void __user *) regs->cp0_epc;
force_sig_info(SIGFPE, &info, current);
} }
asmlinkage void do_bp(struct pt_regs *regs) asmlinkage void do_bp(struct pt_regs *regs)