diff options
| -rw-r--r-- | linux-user/syscall.c | 106 | ||||
| -rw-r--r-- | linux-user/syscall_defs.h | 3 | ||||
| -rw-r--r-- | target/alpha/cpu.h | 42 | ||||
| -rw-r--r-- | target/alpha/fpu_helper.c | 21 | ||||
| -rw-r--r-- | target/alpha/helper.c | 39 |
5 files changed, 141 insertions, 70 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index f5ff6f5dc8..efa3ec2837 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -10223,18 +10223,11 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, switch (arg1) { case TARGET_GSI_IEEE_FP_CONTROL: { - uint64_t swcr, fpcr = cpu_alpha_load_fpcr (cpu_env); - - /* Copied from linux ieee_fpcr_to_swcr. */ - swcr = (fpcr >> 35) & SWCR_STATUS_MASK; - swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; - swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV - | SWCR_TRAP_ENABLE_DZE - | SWCR_TRAP_ENABLE_OVF); - swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF - | SWCR_TRAP_ENABLE_INE); - swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; - swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; + uint64_t fpcr = cpu_alpha_load_fpcr(cpu_env); + uint64_t swcr = ((CPUAlphaState *)cpu_env)->swcr; + + swcr &= ~SWCR_STATUS_MASK; + swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; if (put_user_u64 (swcr, arg2)) return -TARGET_EFAULT; @@ -10261,25 +10254,24 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, switch (arg1) { case TARGET_SSI_IEEE_FP_CONTROL: { - uint64_t swcr, fpcr, orig_fpcr; + uint64_t swcr, fpcr; if (get_user_u64 (swcr, arg2)) { return -TARGET_EFAULT; } - orig_fpcr = cpu_alpha_load_fpcr(cpu_env); - fpcr = orig_fpcr & FPCR_DYN_MASK; - - /* Copied from linux ieee_swcr_to_fpcr. */ - fpcr |= (swcr & SWCR_STATUS_MASK) << 35; - fpcr |= (swcr & SWCR_MAP_DMZ) << 36; - fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV - | SWCR_TRAP_ENABLE_DZE - | SWCR_TRAP_ENABLE_OVF)) << 48; - fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF - | SWCR_TRAP_ENABLE_INE)) << 57; - fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); - fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; + /* + * The kernel calls swcr_update_status to update the + * status bits from the fpcr at every point that it + * could be queried. Therefore, we store the status + * bits only in FPCR. + */ + ((CPUAlphaState *)cpu_env)->swcr + = swcr & (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK); + + fpcr = cpu_alpha_load_fpcr(cpu_env); + fpcr &= ((uint64_t)FPCR_DYN_MASK << 32); + fpcr |= alpha_ieee_swcr_to_fpcr(swcr); cpu_alpha_store_fpcr(cpu_env, fpcr); ret = 0; } @@ -10287,44 +10279,47 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, case TARGET_SSI_IEEE_RAISE_EXCEPTION: { - uint64_t exc, fpcr, orig_fpcr; - int si_code; + uint64_t exc, fpcr, fex; if (get_user_u64(exc, arg2)) { return -TARGET_EFAULT; } + exc &= SWCR_STATUS_MASK; + fpcr = cpu_alpha_load_fpcr(cpu_env); - orig_fpcr = cpu_alpha_load_fpcr(cpu_env); - - /* We only add to the exception status here. */ - fpcr = orig_fpcr | ((exc & SWCR_STATUS_MASK) << 35); + /* Old exceptions are not signaled. */ + fex = alpha_ieee_fpcr_to_swcr(fpcr); + fex = exc & ~fex; + fex >>= SWCR_STATUS_TO_EXCSUM_SHIFT; + fex &= ((CPUArchState *)cpu_env)->swcr; + /* Update the hardware fpcr. */ + fpcr |= alpha_ieee_swcr_to_fpcr(exc); cpu_alpha_store_fpcr(cpu_env, fpcr); - ret = 0; - /* Old exceptions are not signaled. */ - fpcr &= ~(orig_fpcr & FPCR_STATUS_MASK); - - /* If any exceptions set by this call, - and are unmasked, send a signal. */ - si_code = 0; - if ((fpcr & (FPCR_INE | FPCR_INED)) == FPCR_INE) { - si_code = TARGET_FPE_FLTRES; - } - if ((fpcr & (FPCR_UNF | FPCR_UNFD)) == FPCR_UNF) { - si_code = TARGET_FPE_FLTUND; - } - if ((fpcr & (FPCR_OVF | FPCR_OVFD)) == FPCR_OVF) { - si_code = TARGET_FPE_FLTOVF; - } - if ((fpcr & (FPCR_DZE | FPCR_DZED)) == FPCR_DZE) { - si_code = TARGET_FPE_FLTDIV; - } - if ((fpcr & (FPCR_INV | FPCR_INVD)) == FPCR_INV) { - si_code = TARGET_FPE_FLTINV; - } - if (si_code != 0) { + if (fex) { + int si_code = TARGET_FPE_FLTUNK; target_siginfo_t info; + + if (fex & SWCR_TRAP_ENABLE_DNO) { + si_code = TARGET_FPE_FLTUND; + } + if (fex & SWCR_TRAP_ENABLE_INE) { + si_code = TARGET_FPE_FLTRES; + } + if (fex & SWCR_TRAP_ENABLE_UNF) { + si_code = TARGET_FPE_FLTUND; + } + if (fex & SWCR_TRAP_ENABLE_OVF) { + si_code = TARGET_FPE_FLTOVF; + } + if (fex & SWCR_TRAP_ENABLE_DZE) { + si_code = TARGET_FPE_FLTDIV; + } + if (fex & SWCR_TRAP_ENABLE_INV) { + si_code = TARGET_FPE_FLTINV; + } + info.si_signo = SIGFPE; info.si_errno = 0; info.si_code = si_code; @@ -10333,6 +10328,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, queue_signal((CPUArchState *)cpu_env, info.si_signo, QEMU_SI_FAULT, &info); } + ret = 0; } break; diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index 12c8407144..1f5b2d18db 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -635,7 +635,8 @@ typedef struct target_siginfo { #define TARGET_FPE_FLTRES (6) /* floating point inexact result */ #define TARGET_FPE_FLTINV (7) /* floating point invalid operation */ #define TARGET_FPE_FLTSUB (8) /* subscript out of range */ -#define TARGET_NSIGFPE 8 +#define TARGET_FPE_FLTUNK (14) /* undiagnosed fp exception */ +#define TARGET_NSIGFPE 15 /* * SIGSEGV si_codes diff --git a/target/alpha/cpu.h b/target/alpha/cpu.h index cf09112b6a..ba6bc31b15 100644 --- a/target/alpha/cpu.h +++ b/target/alpha/cpu.h @@ -198,6 +198,8 @@ enum { #define SWCR_STATUS_DNO (1U << 22) #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17)) +#define SWCR_STATUS_TO_EXCSUM_SHIFT 16 + #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK) /* MMU modes definitions */ @@ -235,6 +237,9 @@ struct CPUAlphaState { /* The FPCR, and disassembled portions thereof. */ uint32_t fpcr; +#ifdef CONFIG_USER_ONLY + uint32_t swcr; +#endif uint32_t fpcr_exc_enable; float_status fp_status; uint8_t fpcr_dyn_round; @@ -501,4 +506,41 @@ static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, *pflags = env->flags & ENV_FLAG_TB_MASK; } +#ifdef CONFIG_USER_ONLY +/* Copied from linux ieee_swcr_to_fpcr. */ +static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) +{ + uint64_t fpcr = 0; + + fpcr |= (swcr & SWCR_STATUS_MASK) << 35; + fpcr |= (swcr & SWCR_MAP_DMZ) << 36; + fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV + | SWCR_TRAP_ENABLE_DZE + | SWCR_TRAP_ENABLE_OVF)) << 48; + fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF + | SWCR_TRAP_ENABLE_INE)) << 57; + fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); + fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; + + return fpcr; +} + +/* Copied from linux ieee_fpcr_to_swcr. */ +static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) +{ + uint64_t swcr = 0; + + swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; + swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; + swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV + | SWCR_TRAP_ENABLE_DZE + | SWCR_TRAP_ENABLE_OVF); + swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); + swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; + swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; + + return swcr; +} +#endif /* CONFIG_USER_ONLY */ + #endif /* ALPHA_CPU_H */ diff --git a/target/alpha/fpu_helper.c b/target/alpha/fpu_helper.c index 9645978aaa..62a066d902 100644 --- a/target/alpha/fpu_helper.c +++ b/target/alpha/fpu_helper.c @@ -91,10 +91,25 @@ void helper_fp_exc_raise_s(CPUAlphaState *env, uint32_t ignore, uint32_t regno) if (exc) { env->fpcr |= exc; exc &= ~ignore; - if (exc) { - exc &= env->fpcr_exc_enable; - fp_exc_raise1(env, GETPC(), exc, regno, EXC_M_SWC); +#ifdef CONFIG_USER_ONLY + /* + * In user mode, the kernel's software handler only + * delivers a signal if the exception is enabled. + */ + if (!(exc & env->fpcr_exc_enable)) { + return; + } +#else + /* + * In system mode, the software handler gets invoked + * for any non-ignored exception. + */ + if (!exc) { + return; } +#endif + exc &= env->fpcr_exc_enable; + fp_exc_raise1(env, GETPC(), exc, regno, EXC_M_SWC); } } diff --git a/target/alpha/helper.c b/target/alpha/helper.c index 5fe9c87912..2134ee1e9d 100644 --- a/target/alpha/helper.c +++ b/target/alpha/helper.c @@ -29,12 +29,12 @@ #define CONVERT_BIT(X, SRC, DST) \ (SRC > DST ? (X) / (SRC / DST) & (DST) : ((X) & SRC) * (DST / SRC)) -uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env) +uint64_t cpu_alpha_load_fpcr(CPUAlphaState *env) { return (uint64_t)env->fpcr << 32; } -void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val) +void cpu_alpha_store_fpcr(CPUAlphaState *env, uint64_t val) { uint32_t fpcr = val >> 32; uint32_t t = 0; @@ -67,6 +67,22 @@ void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val) env->fpcr_flush_to_zero = (fpcr & FPCR_UNFD) && (fpcr & FPCR_UNDZ); env->fp_status.flush_inputs_to_zero = (fpcr & FPCR_DNZ) != 0; + +#ifdef CONFIG_USER_ONLY + /* + * Override some of these bits with the contents of ENV->SWCR. + * In system mode, some of these would trap to the kernel, at + * which point the kernel's handler would emulate and apply + * the software exception mask. + */ + if (env->swcr & SWCR_MAP_DMZ) { + env->fp_status.flush_inputs_to_zero = 1; + } + if (env->swcr & SWCR_MAP_UMZ) { + env->fp_status.flush_to_zero = 1; + } + env->fpcr_exc_enable &= ~(alpha_ieee_swcr_to_fpcr(env->swcr) >> 32); +#endif } uint64_t helper_load_fpcr(CPUAlphaState *env) @@ -435,32 +451,33 @@ bool alpha_cpu_exec_interrupt(CPUState *cs, int interrupt_request) void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags) { - static const char *linux_reg_names[] = { - "v0 ", "t0 ", "t1 ", "t2 ", "t3 ", "t4 ", "t5 ", "t6 ", - "t7 ", "s0 ", "s1 ", "s2 ", "s3 ", "s4 ", "s5 ", "fp ", - "a0 ", "a1 ", "a2 ", "a3 ", "a4 ", "a5 ", "t8 ", "t9 ", - "t10", "t11", "ra ", "t12", "at ", "gp ", "sp ", "zero", + static const char linux_reg_names[31][4] = { + "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6", + "t7", "s0", "s1", "s2", "s3", "s4", "s5", "fp", + "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9", + "t10", "t11", "ra", "t12", "at", "gp", "sp" }; AlphaCPU *cpu = ALPHA_CPU(cs); CPUAlphaState *env = &cpu->env; int i; - qemu_fprintf(f, " PC " TARGET_FMT_lx " PS %02x\n", + qemu_fprintf(f, "PC " TARGET_FMT_lx " PS %02x\n", env->pc, extract32(env->flags, ENV_FLAG_PS_SHIFT, 8)); for (i = 0; i < 31; i++) { - qemu_fprintf(f, "IR%02d %s " TARGET_FMT_lx "%c", i, + qemu_fprintf(f, "%-8s" TARGET_FMT_lx "%c", linux_reg_names[i], cpu_alpha_load_gr(env, i), (i % 3) == 2 ? '\n' : ' '); } - qemu_fprintf(f, "lock_a " TARGET_FMT_lx " lock_v " TARGET_FMT_lx "\n", + qemu_fprintf(f, "lock_a " TARGET_FMT_lx " lock_v " TARGET_FMT_lx "\n", env->lock_addr, env->lock_value); if (flags & CPU_DUMP_FPU) { for (i = 0; i < 31; i++) { - qemu_fprintf(f, "FIR%02d %016" PRIx64 "%c", i, env->fir[i], + qemu_fprintf(f, "f%-7d%016" PRIx64 "%c", i, env->fir[i], (i % 3) == 2 ? '\n' : ' '); } + qemu_fprintf(f, "fpcr %016" PRIx64 "\n", cpu_alpha_load_fpcr(env)); } qemu_fprintf(f, "\n"); } |