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| 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/mips-r2-to-r6-emul.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/mips-r2-to-r6-emul.h')
| -rw-r--r-- | arch/mips/include/asm/mips-r2-to-r6-emul.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/mips/include/asm/mips-r2-to-r6-emul.h b/arch/mips/include/asm/mips-r2-to-r6-emul.h index dd6f1de5b621..4b89f28047f7 100644 --- a/arch/mips/include/asm/mips-r2-to-r6-emul.h +++ b/arch/mips/include/asm/mips-r2-to-r6-emul.h @@ -84,11 +84,16 @@ extern void do_trap_or_bp(struct pt_regs *regs, unsigned int code, #ifndef CONFIG_MIPSR2_TO_R6_EMULATOR static int mipsr2_emulation; -static inline int mipsr2_decoder(struct pt_regs *regs, u32 inst) { return 0; }; +static inline int mipsr2_decoder(struct pt_regs *regs, u32 inst, + unsigned long *fcr31) +{ + return 0; +}; #else /* MIPS R2 Emulator ON/OFF */ extern int mipsr2_emulation; -extern int mipsr2_decoder(struct pt_regs *regs, u32 inst); +extern int mipsr2_decoder(struct pt_regs *regs, u32 inst, + unsigned long *fcr31); #endif /* CONFIG_MIPSR2_TO_R6_EMULATOR */ #define NO_R6EMU (cpu_has_mips_r6 && !mipsr2_emulation) |