From 948a34cf3988462090291774e55f21f7efdfb072 Mon Sep 17 00:00:00 2001 From: Thiemo Seufer Date: Wed, 22 Aug 2007 01:42:04 +0100 Subject: [PATCH] [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 Signed-off-by: Ralf Baechle --- arch/mips/kernel/traps.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index d6103e510899..6379003f9d8d 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -606,6 +606,8 @@ asmlinkage void do_ov(struct pt_regs *regs) */ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) { + siginfo_t info; + die_if_kernel("FP exception in kernel code", regs); 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); return; - } - - force_sig(SIGFPE, current); + } else if (fcr31 & FPU_CSR_INV_X) + info.si_code = FPE_FLTINV; + 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) -- 2.20.1