diff options
Diffstat (limited to 'arch/parisc/math-emu/driver.c')
| -rw-r--r-- | arch/parisc/math-emu/driver.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/arch/parisc/math-emu/driver.c b/arch/parisc/math-emu/driver.c index 6ce427b58836..71829cb7bc81 100644 --- a/arch/parisc/math-emu/driver.c +++ b/arch/parisc/math-emu/driver.c @@ -26,12 +26,6 @@ #define FPUDEBUG 0 -/* Format of the floating-point exception registers. */ -struct exc_reg { - unsigned int exception : 6; - unsigned int ei : 26; -}; - /* Macros for grabbing bits of the instruction format from the 'ei' field above. */ /* Major opcode 0c and 0e */ @@ -103,9 +97,19 @@ handle_fpe(struct pt_regs *regs) memcpy(regs->fr, frcopy, sizeof regs->fr); if (signalcode != 0) { - force_sig_fault(signalcode >> 24, signalcode & 0xffffff, - (void __user *) regs->iaoq[0]); - return -1; + int sig = signalcode >> 24; + + if (sig == SIGFPE) { + /* + * Clear floating point trap bit to avoid trapping + * again on the first floating-point instruction in + * the userspace signal handler. + */ + regs->fr[0] &= ~(1ULL << 38); + } + force_sig_fault(sig, signalcode & 0xffffff, + (void __user *) regs->iaoq[0]); + return -1; } return signalcode ? -1 : 0; |