diff options
| author | Maciej W. Rozycki <macro@linux-mips.org> | 2015-04-04 01:27:15 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-08 02:10:19 +0300 |
| commit | 304acb717e5b67cf56f05bc5b21123758e1f7ea0 (patch) | |
| tree | 031d9969f99864c02701d9df056f92c894a56116 /arch/mips/include/asm/fpu_emulator.h | |
| parent | 443c44032a54f9acf027a8e688380fddc809bc19 (diff) | |
| download | linux-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.h | 3 |
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); |