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Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/exec.h3
-rw-r--r--target-i386/helper.c28
-rw-r--r--target-i386/op.c15
-rw-r--r--target-i386/translate.c65
4 files changed, 97 insertions, 14 deletions
diff --git a/target-i386/exec.h b/target-i386/exec.h
index 4ff527f841..609a5869a0 100644
--- a/target-i386/exec.h
+++ b/target-i386/exec.h
@@ -496,6 +496,9 @@ void save_native_fp_state(CPUState *env);
float approx_rsqrt(float a);
float approx_rcp(float a);
void update_fp_status(void);
+void helper_hlt(void);
+void helper_monitor(void);
+void helper_mwait(void);
extern const uint8_t parity_table[256];
extern const uint8_t rclw_table[32];
diff --git a/target-i386/helper.c b/target-i386/helper.c
index d7b41ea0b4..70e9fae3b0 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -3408,6 +3408,34 @@ void helper_bswapq_T0(void)
}
#endif
+void helper_hlt(void)
+{
+ env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
+ env->hflags |= HF_HALTED_MASK;
+ env->exception_index = EXCP_HLT;
+ cpu_loop_exit();
+}
+
+void helper_monitor(void)
+{
+ if (ECX != 0)
+ raise_exception(EXCP0D_GPF);
+ /* XXX: store address ? */
+}
+
+void helper_mwait(void)
+{
+ if (ECX != 0)
+ raise_exception(EXCP0D_GPF);
+ /* XXX: not complete but not completely erroneous */
+ if (env->cpu_index != 0 || env->next_cpu != NULL) {
+ /* more than one CPU: do not sleep because another CPU may
+ wake this one */
+ } else {
+ helper_hlt();
+ }
+}
+
float approx_rsqrt(float a)
{
return 1.0 / sqrt(a);
diff --git a/target-i386/op.c b/target-i386/op.c
index a9a8665a1c..7a3aa77273 100644
--- a/target-i386/op.c
+++ b/target-i386/op.c
@@ -614,10 +614,17 @@ void OPPROTO op_movq_eip_im64(void)
void OPPROTO op_hlt(void)
{
- env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
- env->hflags |= HF_HALTED_MASK;
- env->exception_index = EXCP_HLT;
- cpu_loop_exit();
+ helper_hlt();
+}
+
+void OPPROTO op_monitor(void)
+{
+ helper_monitor();
+}
+
+void OPPROTO op_mwait(void)
+{
+ helper_mwait();
}
void OPPROTO op_debug(void)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index c61f964c07..f905f323dd 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -100,6 +100,7 @@ typedef struct DisasContext {
int popl_esp_hack; /* for correct popl with esp base handling */
int rip_offset; /* only used in x86_64, but left for simplicity */
int cpuid_features;
+ int cpuid_ext_features;
} DisasContext;
static void gen_eob(DisasContext *s);
@@ -5567,26 +5568,69 @@ static target_ulong disas_insn(DisasContext *s, target_ulong pc_start)
modrm = ldub_code(s->pc++);
mod = (modrm >> 6) & 3;
op = (modrm >> 3) & 7;
+ rm = modrm & 7;
switch(op) {
case 0: /* sgdt */
- case 1: /* sidt */
if (mod == 3)
goto illegal_op;
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
- if (op == 0)
- gen_op_movl_T0_env(offsetof(CPUX86State,gdt.limit));
- else
- gen_op_movl_T0_env(offsetof(CPUX86State,idt.limit));
+ gen_op_movl_T0_env(offsetof(CPUX86State, gdt.limit));
gen_op_st_T0_A0[OT_WORD + s->mem_index]();
gen_add_A0_im(s, 2);
- if (op == 0)
- gen_op_movtl_T0_env(offsetof(CPUX86State,gdt.base));
- else
- gen_op_movtl_T0_env(offsetof(CPUX86State,idt.base));
+ gen_op_movtl_T0_env(offsetof(CPUX86State, gdt.base));
if (!s->dflag)
gen_op_andl_T0_im(0xffffff);
gen_op_st_T0_A0[CODE64(s) + OT_LONG + s->mem_index]();
break;
+ case 1:
+ if (mod == 3) {
+ switch (rm) {
+ case 0: /* monitor */
+ if (!(s->cpuid_ext_features & CPUID_EXT_MONITOR) ||
+ s->cpl != 0)
+ goto illegal_op;
+ gen_jmp_im(pc_start - s->cs_base);
+#ifdef TARGET_X86_64
+ if (s->aflag == 2) {
+ gen_op_movq_A0_reg[R_EBX]();
+ gen_op_addq_A0_AL();
+ } else
+#endif
+ {
+ gen_op_movl_A0_reg[R_EBX]();
+ gen_op_addl_A0_AL();
+ if (s->aflag == 0)
+ gen_op_andl_A0_ffff();
+ }
+ gen_add_A0_ds_seg(s);
+ gen_op_monitor();
+ break;
+ case 1: /* mwait */
+ if (!(s->cpuid_ext_features & CPUID_EXT_MONITOR) ||
+ s->cpl != 0)
+ goto illegal_op;
+ if (s->cc_op != CC_OP_DYNAMIC) {
+ gen_op_set_cc_op(s->cc_op);
+ s->cc_op = CC_OP_DYNAMIC;
+ }
+ gen_jmp_im(s->pc - s->cs_base);
+ gen_op_mwait();
+ gen_eob(s);
+ break;
+ default:
+ goto illegal_op;
+ }
+ } else { /* sidt */
+ gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
+ gen_op_movl_T0_env(offsetof(CPUX86State, idt.limit));
+ gen_op_st_T0_A0[OT_WORD + s->mem_index]();
+ gen_add_A0_im(s, 2);
+ gen_op_movtl_T0_env(offsetof(CPUX86State, idt.base));
+ if (!s->dflag)
+ gen_op_andl_T0_im(0xffffff);
+ gen_op_st_T0_A0[CODE64(s) + OT_LONG + s->mem_index]();
+ }
+ break;
case 2: /* lgdt */
case 3: /* lidt */
if (mod == 3)
@@ -5629,7 +5673,7 @@ static target_ulong disas_insn(DisasContext *s, target_ulong pc_start)
} else {
if (mod == 3) {
#ifdef TARGET_X86_64
- if (CODE64(s) && (modrm & 7) == 0) {
+ if (CODE64(s) && rm == 0) {
/* swapgs */
gen_op_movtl_T0_env(offsetof(CPUX86State,segs[R_GS].base));
gen_op_movtl_T1_env(offsetof(CPUX86State,kernelgsbase));
@@ -6348,6 +6392,7 @@ static inline int gen_intermediate_code_internal(CPUState *env,
dc->mem_index = 1 * 4;
}
dc->cpuid_features = env->cpuid_features;
+ dc->cpuid_ext_features = env->cpuid_ext_features;
#ifdef TARGET_X86_64
dc->lma = (flags >> HF_LMA_SHIFT) & 1;
dc->code64 = (flags >> HF_CS64_SHIFT) & 1;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-20 17:57:17 +0000