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Commit 948a34cf authored by Thiemo Seufer's avatar Thiemo Seufer Committed by Ralf Baechle
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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: default avatarThiemo Seufer <ths@linux-mips.org>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 34412c72

arch/mips/kernel/traps.c

+18 −3
Original line number Original line Diff line number Diff line
@@ -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)