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authorMaciej W. Rozycki <macro@linux-mips.org>2015-04-04 01:27:15 +0300
committerRalf Baechle <ralf@linux-mips.org>2015-04-08 02:10:19 +0300
commit304acb717e5b67cf56f05bc5b21123758e1f7ea0 (patch)
tree031d9969f99864c02701d9df056f92c894a56116 /arch/mips/include/asm/fpu_emulator.h
parent443c44032a54f9acf027a8e688380fddc809bc19 (diff)
downloadlinux-304acb717e5b67cf56f05bc5b21123758e1f7ea0.tar.xz
MIPS: Set `si_code' for SIGFPE signals sent from emulation too
Rework `process_fpemu_return' and move IEEE 754 exception interpretation there, from `do_fpe'. Record the cause bits set in FCSR before they are cleared and pass them through to `process_fpemu_return' so as to set `si_code' correctly too for SIGFPE signals sent from emulation rather than those issued by hardware with the FPE processor exception only. For simplicity `mipsr2_decoder' assumes `*fcr31' has been preinitialised and only sets it to anything if an FPU instruction has been emulated, which in turn is the only case SIGFPE can be issued for here. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9705/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/fpu_emulator.h')
-rw-r--r--arch/mips/include/asm/fpu_emulator.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h
index 6370c82eb5e1..bfcc5c64b7b0 100644
--- a/arch/mips/include/asm/fpu_emulator.h
+++ b/arch/mips/include/asm/fpu_emulator.h
@@ -66,7 +66,8 @@ extern int do_dsemulret(struct pt_regs *xcp);
extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
struct mips_fpu_struct *ctx, int has_fpu,
void *__user *fault_addr);
-int process_fpemu_return(int sig, void __user *fault_addr);
+int process_fpemu_return(int sig, void __user *fault_addr,
+ unsigned long fcr31);
int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc);