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target-i386: exception handling for FPU instructions 

This patch fixes exception handling for FPU instructions
and removes obsolete PC update from translate.c.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Pavel Dovgalyuk 2015-07-10 12:57:19 +03:00 committed by Richard Henderson
parent 9198009529
commit 6cad09d2f7
2 changed files with 95 additions and 93 deletions
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164
target-i386/fpu_helper.c
View File

@ -67,22 +67,24 @@ static inline void fpop(CPUX86State *env)
env->fpstt = (env->fpstt + 1) & 7;
}
static inline floatx80 helper_fldt(CPUX86State *env, target_ulong ptr)
static inline floatx80 helper_fldt(CPUX86State *env, target_ulong ptr,
uintptr_t retaddr)
{
CPU_LDoubleU temp;
temp.l.lower = cpu_ldq_data(env, ptr);
temp.l.upper = cpu_lduw_data(env, ptr + 8);
temp.l.lower = cpu_ldq_data_ra(env, ptr, retaddr);
temp.l.upper = cpu_lduw_data_ra(env, ptr + 8, retaddr);
return temp.d;
}
static inline void helper_fstt(CPUX86State *env, floatx80 f, target_ulong ptr)
static inline void helper_fstt(CPUX86State *env, floatx80 f, target_ulong ptr,
uintptr_t retaddr)
{
CPU_LDoubleU temp;
temp.d = f;
cpu_stq_data(env, ptr, temp.l.lower);
cpu_stw_data(env, ptr + 8, temp.l.upper);
cpu_stq_data_ra(env, ptr, temp.l.lower, retaddr);
cpu_stw_data_ra(env, ptr + 8, temp.l.upper, retaddr);
}
/* x87 FPU helpers */
@ -125,10 +127,10 @@ static inline floatx80 helper_fdiv(CPUX86State *env, floatx80 a, floatx80 b)
return floatx80_div(a, b, &env->fp_status);
}
static void fpu_raise_exception(CPUX86State *env)
static void fpu_raise_exception(CPUX86State *env, uintptr_t retaddr)
{
if (env->cr[0] & CR0_NE_MASK) {
raise_exception(env, EXCP10_COPR);
raise_exception_ra(env, EXCP10_COPR, retaddr);
}
#if !defined(CONFIG_USER_ONLY)
else {
@ -313,14 +315,14 @@ void helper_fldt_ST0(CPUX86State *env, target_ulong ptr)
int new_fpstt;
new_fpstt = (env->fpstt - 1) & 7;
env->fpregs[new_fpstt].d = helper_fldt(env, ptr);
env->fpregs[new_fpstt].d = helper_fldt(env, ptr, GETPC());
env->fpstt = new_fpstt;
env->fptags[new_fpstt] = 0; /* validate stack entry */
}
void helper_fstt_ST0(CPUX86State *env, target_ulong ptr)
{
helper_fstt(env, ST0, ptr);
helper_fstt(env, ST0, ptr, GETPC());
}
void helper_fpush(CPUX86State *env)
@ -603,7 +605,7 @@ void helper_fclex(CPUX86State *env)
void helper_fwait(CPUX86State *env)
{
if (env->fpus & FPUS_SE) {
fpu_raise_exception(env);
fpu_raise_exception(env, GETPC());
}
}
@ -633,11 +635,11 @@ void helper_fbld_ST0(CPUX86State *env, target_ulong ptr)
val = 0;
for (i = 8; i >= 0; i--) {
v = cpu_ldub_data(env, ptr + i);
v = cpu_ldub_data_ra(env, ptr + i, GETPC());
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf);
}
tmp = int64_to_floatx80(val, &env->fp_status);
if (cpu_ldub_data(env, ptr + 9) & 0x80) {
if (cpu_ldub_data_ra(env, ptr + 9, GETPC()) & 0x80) {
tmp = floatx80_chs(tmp);
}
fpush(env);
@ -654,10 +656,10 @@ void helper_fbst_ST0(CPUX86State *env, target_ulong ptr)
mem_ref = ptr;
mem_end = mem_ref + 9;
if (val < 0) {
cpu_stb_data(env, mem_end, 0x80);
cpu_stb_data_ra(env, mem_end, 0x80, GETPC());
val = -val;
} else {
cpu_stb_data(env, mem_end, 0x00);
cpu_stb_data_ra(env, mem_end, 0x00, GETPC());
}
while (mem_ref < mem_end) {
if (val == 0) {
@ -666,10 +668,10 @@ void helper_fbst_ST0(CPUX86State *env, target_ulong ptr)
v = val % 100;
val = val / 100;
v = ((v / 10) << 4) | (v % 10);
cpu_stb_data(env, mem_ref++, v);
cpu_stb_data_ra(env, mem_ref++, v, GETPC());
}
while (mem_ref < mem_end) {
cpu_stb_data(env, mem_ref++, 0);
cpu_stb_data_ra(env, mem_ref++, 0, GETPC());
}
}
@ -977,7 +979,8 @@ void helper_fxam_ST0(CPUX86State *env)
}
}
void helper_fstenv(CPUX86State *env, target_ulong ptr, int data32)
static void do_fstenv(CPUX86State *env, target_ulong ptr, int data32,
uintptr_t retaddr)
{
int fpus, fptag, exp, i;
uint64_t mant;
@ -1005,37 +1008,43 @@ void helper_fstenv(CPUX86State *env, target_ulong ptr, int data32)
}
if (data32) {
/* 32 bit */
cpu_stl_data(env, ptr, env->fpuc);
cpu_stl_data(env, ptr + 4, fpus);
cpu_stl_data(env, ptr + 8, fptag);
cpu_stl_data(env, ptr + 12, 0); /* fpip */
cpu_stl_data(env, ptr + 16, 0); /* fpcs */
cpu_stl_data(env, ptr + 20, 0); /* fpoo */
cpu_stl_data(env, ptr + 24, 0); /* fpos */
cpu_stl_data_ra(env, ptr, env->fpuc, retaddr);
cpu_stl_data_ra(env, ptr + 4, fpus, retaddr);
cpu_stl_data_ra(env, ptr + 8, fptag, retaddr);
cpu_stl_data_ra(env, ptr + 12, 0, retaddr); /* fpip */
cpu_stl_data_ra(env, ptr + 16, 0, retaddr); /* fpcs */
cpu_stl_data_ra(env, ptr + 20, 0, retaddr); /* fpoo */
cpu_stl_data_ra(env, ptr + 24, 0, retaddr); /* fpos */
} else {
/* 16 bit */
cpu_stw_data(env, ptr, env->fpuc);
cpu_stw_data(env, ptr + 2, fpus);
cpu_stw_data(env, ptr + 4, fptag);
cpu_stw_data(env, ptr + 6, 0);
cpu_stw_data(env, ptr + 8, 0);
cpu_stw_data(env, ptr + 10, 0);
cpu_stw_data(env, ptr + 12, 0);
cpu_stw_data_ra(env, ptr, env->fpuc, retaddr);
cpu_stw_data_ra(env, ptr + 2, fpus, retaddr);
cpu_stw_data_ra(env, ptr + 4, fptag, retaddr);
cpu_stw_data_ra(env, ptr + 6, 0, retaddr);
cpu_stw_data_ra(env, ptr + 8, 0, retaddr);
cpu_stw_data_ra(env, ptr + 10, 0, retaddr);
cpu_stw_data_ra(env, ptr + 12, 0, retaddr);
}
}
void helper_fldenv(CPUX86State *env, target_ulong ptr, int data32)
void helper_fstenv(CPUX86State *env, target_ulong ptr, int data32)
{
do_fstenv(env, ptr, data32, GETPC());
}
static void do_fldenv(CPUX86State *env, target_ulong ptr, int data32,
uintptr_t retaddr)
{
int i, fpus, fptag;
if (data32) {
cpu_set_fpuc(env, cpu_lduw_data(env, ptr));
fpus = cpu_lduw_data(env, ptr + 4);
fptag = cpu_lduw_data(env, ptr + 8);
cpu_set_fpuc(env, cpu_lduw_data_ra(env, ptr, retaddr));
fpus = cpu_lduw_data_ra(env, ptr + 4, retaddr);
fptag = cpu_lduw_data_ra(env, ptr + 8, retaddr);
} else {
cpu_set_fpuc(env, cpu_lduw_data(env, ptr));
fpus = cpu_lduw_data(env, ptr + 2);
fptag = cpu_lduw_data(env, ptr + 4);
cpu_set_fpuc(env, cpu_lduw_data_ra(env, ptr, retaddr));
fpus = cpu_lduw_data_ra(env, ptr + 2, retaddr);
fptag = cpu_lduw_data_ra(env, ptr + 4, retaddr);
}
env->fpstt = (fpus >> 11) & 7;
env->fpus = fpus & ~0x3800;
@ -1045,17 +1054,22 @@ void helper_fldenv(CPUX86State *env, target_ulong ptr, int data32)
}
}
void helper_fldenv(CPUX86State *env, target_ulong ptr, int data32)
{
do_fldenv(env, ptr, data32, GETPC());
}
void helper_fsave(CPUX86State *env, target_ulong ptr, int data32)
{
floatx80 tmp;
int i;
helper_fstenv(env, ptr, data32);
do_fstenv(env, ptr, data32, GETPC());
ptr += (14 << data32);
for (i = 0; i < 8; i++) {
tmp = ST(i);
helper_fstt(env, tmp, ptr);
helper_fstt(env, tmp, ptr, GETPC());
ptr += 10;
}
@ -1078,11 +1092,11 @@ void helper_frstor(CPUX86State *env, target_ulong ptr, int data32)
floatx80 tmp;
int i;
helper_fldenv(env, ptr, data32);
do_fldenv(env, ptr, data32, GETPC());
ptr += (14 << data32);
for (i = 0; i < 8; i++) {
tmp = helper_fldt(env, ptr);
tmp = helper_fldt(env, ptr, GETPC());
ST(i) = tmp;
ptr += 10;
}
@ -1100,7 +1114,8 @@ void cpu_x86_frstor(CPUX86State *env, target_ulong ptr, int data32)
}
#endif
void helper_fxsave(CPUX86State *env, target_ulong ptr, int data64)
static void do_fxsave(CPUX86State *env, target_ulong ptr, int data64,
uintptr_t retaddr)
{
int fpus, fptag, i, nb_xmm_regs;
floatx80 tmp;
@ -1108,7 +1123,7 @@ void helper_fxsave(CPUX86State *env, target_ulong ptr, int data64)
/* The operand must be 16 byte aligned */
if (ptr & 0xf) {
raise_exception(env, EXCP0D_GPF);
raise_exception_ra(env, EXCP0D_GPF, retaddr);
}
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
@ -1116,33 +1131,33 @@ void helper_fxsave(CPUX86State *env, target_ulong ptr, int data64)
for (i = 0; i < 8; i++) {
fptag |= (env->fptags[i] << i);
}
cpu_stw_data(env, ptr, env->fpuc);
cpu_stw_data(env, ptr + 2, fpus);
cpu_stw_data(env, ptr + 4, fptag ^ 0xff);
cpu_stw_data_ra(env, ptr, env->fpuc, retaddr);
cpu_stw_data_ra(env, ptr + 2, fpus, retaddr);
cpu_stw_data_ra(env, ptr + 4, fptag ^ 0xff, retaddr);
#ifdef TARGET_X86_64
if (data64) {
cpu_stq_data(env, ptr + 0x08, 0); /* rip */
cpu_stq_data(env, ptr + 0x10, 0); /* rdp */
cpu_stq_data_ra(env, ptr + 0x08, 0, retaddr); /* rip */
cpu_stq_data_ra(env, ptr + 0x10, 0, retaddr); /* rdp */
} else
#endif
{
cpu_stl_data(env, ptr + 0x08, 0); /* eip */
cpu_stl_data(env, ptr + 0x0c, 0); /* sel */
cpu_stl_data(env, ptr + 0x10, 0); /* dp */
cpu_stl_data(env, ptr + 0x14, 0); /* sel */
cpu_stl_data_ra(env, ptr + 0x08, 0, retaddr); /* eip */
cpu_stl_data_ra(env, ptr + 0x0c, 0, retaddr); /* sel */
cpu_stl_data_ra(env, ptr + 0x10, 0, retaddr); /* dp */
cpu_stl_data_ra(env, ptr + 0x14, 0, retaddr); /* sel */
}
addr = ptr + 0x20;
for (i = 0; i < 8; i++) {
tmp = ST(i);
helper_fstt(env, tmp, addr);
helper_fstt(env, tmp, addr, retaddr);
addr += 16;
}
if (env->cr[4] & CR4_OSFXSR_MASK) {
/* XXX: finish it */
cpu_stl_data(env, ptr + 0x18, env->mxcsr); /* mxcsr */
cpu_stl_data(env, ptr + 0x1c, 0x0000ffff); /* mxcsr_mask */
cpu_stl_data_ra(env, ptr + 0x18, env->mxcsr, retaddr); /* mxcsr */
cpu_stl_data_ra(env, ptr + 0x1c, 0x0000ffff, retaddr); /* mxcsr_mask */
if (env->hflags & HF_CS64_MASK) {
nb_xmm_regs = 16;
} else {
@ -1154,15 +1169,21 @@ void helper_fxsave(CPUX86State *env, target_ulong ptr, int data64)
|| (env->hflags & HF_CPL_MASK)
|| !(env->hflags & HF_LMA_MASK)) {
for (i = 0; i < nb_xmm_regs; i++) {
cpu_stq_data(env, addr, env->xmm_regs[i].XMM_Q(0));
cpu_stq_data(env, addr + 8, env->xmm_regs[i].XMM_Q(1));
cpu_stq_data_ra(env, addr, env->xmm_regs[i].XMM_Q(0), retaddr);
cpu_stq_data_ra(env, addr + 8, env->xmm_regs[i].XMM_Q(1), retaddr);
addr += 16;
}
}
}
}
void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
void helper_fxsave(CPUX86State *env, target_ulong ptr, int data64)
{
do_fxsave(env, ptr, data64, GETPC());
}
static void do_fxrstor(CPUX86State *env, target_ulong ptr, int data64,
uintptr_t retaddr)
{
int i, fpus, fptag, nb_xmm_regs;
floatx80 tmp;
@ -1170,12 +1191,12 @@ void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
/* The operand must be 16 byte aligned */
if (ptr & 0xf) {
raise_exception(env, EXCP0D_GPF);
raise_exception_ra(env, EXCP0D_GPF, retaddr);
}
cpu_set_fpuc(env, cpu_lduw_data(env, ptr));
fpus = cpu_lduw_data(env, ptr + 2);
fptag = cpu_lduw_data(env, ptr + 4);
cpu_set_fpuc(env, cpu_lduw_data_ra(env, ptr, retaddr));
fpus = cpu_lduw_data_ra(env, ptr + 2, retaddr);
fptag = cpu_lduw_data_ra(env, ptr + 4, retaddr);
env->fpstt = (fpus >> 11) & 7;
env->fpus = fpus & ~0x3800;
fptag ^= 0xff;
@ -1185,15 +1206,15 @@ void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
addr = ptr + 0x20;
for (i = 0; i < 8; i++) {
tmp = helper_fldt(env, addr);
tmp = helper_fldt(env, addr, retaddr);
ST(i) = tmp;
addr += 16;
}
if (env->cr[4] & CR4_OSFXSR_MASK) {
/* XXX: finish it */
cpu_set_mxcsr(env, cpu_ldl_data(env, ptr + 0x18));
/* cpu_ldl_data(env, ptr + 0x1c); */
cpu_set_mxcsr(env, cpu_ldl_data_ra(env, ptr + 0x18, retaddr));
/* cpu_ldl_data_ra(env, ptr + 0x1c, retaddr); */
if (env->hflags & HF_CS64_MASK) {
nb_xmm_regs = 16;
} else {
@ -1205,14 +1226,19 @@ void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
|| (env->hflags & HF_CPL_MASK)
|| !(env->hflags & HF_LMA_MASK)) {
for (i = 0; i < nb_xmm_regs; i++) {
env->xmm_regs[i].XMM_Q(0) = cpu_ldq_data(env, addr);
env->xmm_regs[i].XMM_Q(1) = cpu_ldq_data(env, addr + 8);
env->xmm_regs[i].XMM_Q(0) = cpu_ldq_data_ra(env, addr, retaddr);
env->xmm_regs[i].XMM_Q(1) = cpu_ldq_data_ra(env, addr + 8, retaddr);
addr += 16;
}
}
}
}
void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
{
do_fxrstor(env, ptr, data64, GETPC());
}
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, floatx80 f)
{
CPU_LDoubleU temp;

24
target-i386/translate.c
View File

@ -5836,8 +5836,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
}
break;
case 0x0c: /* fldenv mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fldenv(cpu_env, cpu_A0, tcg_const_i32(dflag - 1));
break;
case 0x0d: /* fldcw mem */
@ -5846,8 +5844,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_helper_fldcw(cpu_env, cpu_tmp2_i32);
break;
case 0x0e: /* fnstenv mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fstenv(cpu_env, cpu_A0, tcg_const_i32(dflag - 1));
break;
case 0x0f: /* fnstcw mem */
@ -5856,24 +5852,16 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
s->mem_index, MO_LEUW);
break;
case 0x1d: /* fldt mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fldt_ST0(cpu_env, cpu_A0);
break;
case 0x1f: /* fstpt mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fstt_ST0(cpu_env, cpu_A0);
gen_helper_fpop(cpu_env);
break;
case 0x2c: /* frstor mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_frstor(cpu_env, cpu_A0, tcg_const_i32(dflag - 1));
break;
case 0x2e: /* fnsave mem */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fsave(cpu_env, cpu_A0, tcg_const_i32(dflag - 1));
break;
case 0x2f: /* fnstsw mem */
@ -5882,13 +5870,9 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
s->mem_index, MO_LEUW);
break;
case 0x3c: /* fbld */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fbld_ST0(cpu_env, cpu_A0);
break;
case 0x3e: /* fbstp */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fbst_ST0(cpu_env, cpu_A0);
gen_helper_fpop(cpu_env);
break;
@ -5923,8 +5907,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
switch(rm) {
case 0: /* fnop */
/* check exceptions (FreeBSD FPU probe) */
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fwait(cpu_env);
break;
default:
@ -6894,8 +6876,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
(HF_MP_MASK | HF_TS_MASK)) {
gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
} else {
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fwait(cpu_env);
}
break;
@ -7725,8 +7705,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
break;
}
gen_lea_modrm(env, s, modrm);
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fxsave(cpu_env, cpu_A0, tcg_const_i32(dflag == MO_64));
break;
case 1: /* fxrstor */
@ -7738,8 +7716,6 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
break;
}
gen_lea_modrm(env, s, modrm);
gen_update_cc_op(s);
gen_jmp_im(pc_start - s->cs_base);
gen_helper_fxrstor(cpu_env, cpu_A0, tcg_const_i32(dflag == MO_64));
break;
case 2: /* ldmxcsr */