Index: sys/powerpc/include/psl.h =================================================================== --- sys/powerpc/include/psl.h +++ sys/powerpc/include/psl.h @@ -88,7 +88,7 @@ #define PSL_FE_NONREC PSL_FE1 /* imprecise non-recoverable */ #define PSL_FE_REC PSL_FE0 /* imprecise recoverable */ #define PSL_FE_PREC (PSL_FE0 | PSL_FE1) /* precise */ -#define PSL_FE_DFLT PSL_FE_DIS /* default == none */ +#define PSL_FE_DFLT PSL_FE_PREC /* default == precise */ #ifndef LOCORE extern register_t psl_kernset; /* Default MSR values for kernel */ Index: sys/powerpc/powerpc/exec_machdep.c =================================================================== --- sys/powerpc/powerpc/exec_machdep.c +++ sys/powerpc/powerpc/exec_machdep.c @@ -1158,6 +1158,12 @@ sig = fpu_emulate(frame, &pcb->pcb_fpu); if ((sig == 0 || sig == SIGFPE) && pcb->pcb_flags & PCB_FPU) enable_fpu(td); +#else + if ((frame->srr1 & EXC_PGM_FPENABLED) && (pcb->pcb_flags & PCB_FPU)) { + /* Floating-Point Enabled Exception type Program interrupt */ + sig = SIGFPE; + enable_fpu(td); + } #endif if (sig == SIGILL) { if (pcb->pcb_lastill != frame->srr0) { Index: sys/powerpc/powerpc/trap.c =================================================================== --- sys/powerpc/powerpc/trap.c +++ sys/powerpc/powerpc/trap.c @@ -397,8 +397,29 @@ ucode = ILL_PRVOPC; else if (frame->srr1 & EXC_PGM_ILLEGAL) ucode = ILL_ILLOPC; - } else if (sig == SIGFPE) - ucode = FPE_FLTINV; /* Punt for now, invalid operation. */ + } else if (sig == SIGFPE) { + int msr; + uint64_t reg; + + msr = mfmsr(); + mtmsr(msr | PSL_FP); + __asm __volatile ("mffs 0; stfd 0,0(%0)" + :: "b"(®)); + mtmsr(msr); + + if (reg & FPSCR_ZX) + ucode = FPE_FLTDIV; + else if (reg & FPSCR_OX) + ucode = FPE_FLTOVF; + else if (reg & FPSCR_UX) + ucode = FPE_FLTUND; + else if (reg & FPSCR_XX) + ucode = FPE_FLTRES; + else + ucode = FPE_FLTINV; + + save_fpu(td); + } } break;