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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2015-04-04 00:27:15 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-08 01:10:19 +0200 |
| commit | 304acb717e5b67cf56f05bc5b21123758e1f7ea0 (patch) | |
| tree | 031d9969f99864c02701d9df056f92c894a56116 /arch/mips/kernel/unaligned.c | |
| parent | MIPS: Always clear FCSR cause bits after emulation (diff) | |
| download | linux-304acb717e5b67cf56f05bc5b21123758e1f7ea0.tar.xz linux-304acb717e5b67cf56f05bc5b21123758e1f7ea0.zip | |
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/kernel/unaligned.c')
| -rw-r--r-- | arch/mips/kernel/unaligned.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c index bbb69695a0a1..cf51ad36f213 100644 --- a/arch/mips/kernel/unaligned.c +++ b/arch/mips/kernel/unaligned.c @@ -1076,7 +1076,7 @@ static void emulate_load_store_insn(struct pt_regs *regs, own_fpu(1); /* Restore FPU state. */ /* Signal if something went wrong. */ - process_fpemu_return(res, fault_addr); + process_fpemu_return(res, fault_addr, 0); if (res == 0) break; @@ -1511,7 +1511,7 @@ fpu_emul: own_fpu(1); /* restore FPU state */ /* If something went wrong, signal */ - process_fpemu_return(res, fault_addr); + process_fpemu_return(res, fault_addr, 0); if (res == 0) goto success; |