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dummy rdmsr and wrmsr support - xor reg, reg optimization 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@311 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-07-07 11:30:47 +00:00
parent 1f47a9223e
commit 3c1cf9fa86
7 changed files with 117 additions and 5 deletions
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14
cpu-i386.h
View File

@ -125,6 +125,15 @@
#define PG_ERROR_U_MASK 0x04
#define PG_ERROR_RSVD_MASK 0x08
#define MSR_IA32_APICBASE 0x1b
#define MSR_IA32_APICBASE_BSP (1<<8)
#define MSR_IA32_APICBASE_ENABLE (1<<11)
#define MSR_IA32_APICBASE_BASE (0xfffff<<12)
#define MSR_IA32_SYSENTER_CS 0x174
#define MSR_IA32_SYSENTER_ESP 0x175
#define MSR_IA32_SYSENTER_EIP 0x176
#define EXCP00_DIVZ 0
#define EXCP01_SSTP 1
#define EXCP02_NMI 2
@ -244,6 +253,11 @@ typedef struct CPUX86State {
SegmentCache tr;
SegmentCache gdt; /* only base and limit are used */
SegmentCache idt; /* only base and limit are used */
/* sysenter registers */
uint32_t sysenter_cs;
uint32_t sysenter_esp;
uint32_t sysenter_eip;
/* exception/interrupt handling */
jmp_buf jmp_env;

2
exec-i386.h
View File

@ -159,6 +159,8 @@ void helper_idivl_EAX_T0(uint32_t eip);
void helper_cmpxchg8b(void);
void helper_cpuid(void);
void helper_rdtsc(void);
void helper_rdmsr(void);
void helper_wrmsr(void);
void helper_lsl(void);
void helper_lar(void);

15
exec.h
View File

@ -324,6 +324,7 @@ typedef int spinlock_t;
#define SPIN_LOCK_UNLOCKED 0
#if 1
static inline void spin_lock(spinlock_t *lock)
{
while (testandset(lock));
@ -338,6 +339,20 @@ static inline int spin_trylock(spinlock_t *lock)
{
return !testandset(lock);
}
#else
static inline void spin_lock(spinlock_t *lock)
{
}
static inline void spin_unlock(spinlock_t *lock)
{
}
static inline int spin_trylock(spinlock_t *lock)
{
return 1;
}
#endif
extern spinlock_t tb_lock;

39
helper-i386.c
View File

@ -947,6 +947,45 @@ void helper_rdtsc(void)
EDX = val >> 32;
}
void helper_wrmsr(void)
{
switch(ECX) {
case MSR_IA32_SYSENTER_CS:
env->sysenter_cs = EAX & 0xffff;
break;
case MSR_IA32_SYSENTER_ESP:
env->sysenter_esp = EAX;
break;
case MSR_IA32_SYSENTER_EIP:
env->sysenter_eip = EAX;
break;
default:
/* XXX: exception ? */
break;
}
}
void helper_rdmsr(void)
{
switch(ECX) {
case MSR_IA32_SYSENTER_CS:
EAX = env->sysenter_cs;
EDX = 0;
break;
case MSR_IA32_SYSENTER_ESP:
EAX = env->sysenter_esp;
EDX = 0;
break;
case MSR_IA32_SYSENTER_EIP:
EAX = env->sysenter_eip;
EDX = 0;
break;
default:
/* XXX: exception ? */
break;
}
}
void helper_lsl(void)
{
unsigned int selector, limit;

10
op-i386.c
View File

@ -751,6 +751,16 @@ void OPPROTO op_cpuid(void)
helper_cpuid();
}
void OPPROTO op_rdmsr(void)
{
helper_rdmsr();
}
void OPPROTO op_wrmsr(void)
{
helper_wrmsr();
}
/* bcd */
/* XXX: exception */

29
translate-i386.c
View File

@ -1575,14 +1575,22 @@ long disas_insn(DisasContext *s, uint8_t *pc_start)
switch(f) {
case 0: /* OP Ev, Gv */
modrm = ldub(s->pc++);
reg = ((modrm >> 3) & 7) + OR_EAX;
reg = ((modrm >> 3) & 7);
mod = (modrm >> 6) & 3;
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
opreg = OR_TMP0;
} else if (op == OP_XORL && rm == reg) {
xor_zero:
/* xor reg, reg optimisation */
gen_op_movl_T0_0();
s->cc_op = CC_OP_LOGICB + ot;
gen_op_mov_reg_T0[ot][reg]();
gen_op_update1_cc();
break;
} else {
opreg = OR_EAX + rm;
opreg = rm;
}
gen_op_mov_TN_reg[ot][1][reg]();
gen_op(s, op, ot, opreg);
@ -1590,11 +1598,13 @@ long disas_insn(DisasContext *s, uint8_t *pc_start)
case 1: /* OP Gv, Ev */
modrm = ldub(s->pc++);
mod = (modrm >> 6) & 3;
reg = ((modrm >> 3) & 7) + OR_EAX;
reg = ((modrm >> 3) & 7);
rm = modrm & 7;
if (mod != 3) {
gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
gen_op_ld_T1_A0[ot]();
} else if (op == OP_XORL && rm == reg) {
goto xor_zero;
} else {
gen_op_mov_TN_reg[ot][1][rm]();
}
@ -3464,6 +3474,17 @@ long disas_insn(DisasContext *s, uint8_t *pc_start)
gen_op_loop[s->aflag][b & 3](val, next_eip);
s->is_jmp = 1;
break;
case 0x130: /* wrmsr */
case 0x132: /* rdmsr */
if (s->cpl != 0) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
} else {
if (b & 2)
gen_op_rdmsr();
else
gen_op_wrmsr();
}
break;
case 0x131: /* rdtsc */
gen_op_rdtsc();
break;
@ -4267,7 +4288,7 @@ void cpu_x86_update_cr0(CPUX86State *env)
void cpu_x86_update_cr3(CPUX86State *env)
{
if (env->cr[0] & CR0_PG_MASK) {
#ifdef DEBUG_MMU
#if defined(DEBUG_MMU)
printf("CR3 update: CR3=%08x\n", env->cr[3]);
#endif
page_unmap();

13
translate.c
View File

@ -179,7 +179,18 @@ int cpu_restore_state(TranslationBlock *tb,
#if defined(TARGET_I386)
{
int cc_op;
#ifdef DEBUG_DISAS
if (loglevel) {
int i;
for(i=0;i<=j; i++) {
if (gen_opc_instr_start[i]) {
fprintf(logfile, "0x%04x: 0x%08x", i, gen_opc_pc[i]);
}
}
fprintf(logfile, "j=0x%x eip=0x%lx cs_base=%lx\n",
j, gen_opc_pc[j] - tb->cs_base, tb->cs_base);
}
#endif
env->eip = gen_opc_pc[j] - tb->cs_base;
cc_op = gen_opc_cc_op[j];
if (cc_op != CC_OP_DYNAMIC)