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eflags update

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@56 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-03-29 16:52:44 +00:00
parent 9c605cb135
commit fc2b4c4879
2 changed files with 26 additions and 19 deletions
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34
cpu-i386.h
View File

@ -48,6 +48,7 @@
#define R_FS 4 #define R_FS 4
#define R_GS 5 #define R_GS 5
/* eflags masks */
#define CC_C 0x0001 #define CC_C 0x0001
#define CC_P 0x0004 #define CC_P 0x0004
#define CC_A 0x0010 #define CC_A 0x0010
@ -55,15 +56,17 @@
#define CC_S 0x0080 #define CC_S 0x0080
#define CC_O 0x0800 #define CC_O 0x0800
#define TRAP_FLAG 0x0100 #define TF_MASK 0x00000100
#define INTERRUPT_FLAG 0x0200 #define IF_MASK 0x00000200
#define DIRECTION_FLAG 0x0400 #define DF_MASK 0x00000400
#define IOPL_FLAG_MASK 0x3000 #define IOPL_MASK 0x00003000
#define NESTED_FLAG 0x4000 #define NT_MASK 0x00004000
#define BYTE_FL 0x8000 /* Intel reserved! */ #define RF_MASK 0x00010000
#define RF_FLAG 0x10000 #define VM_MASK 0x00020000
#define VM_FLAG 0x20000 #define AC_MASK 0x00040000
/* AC 0x40000 */ #define VIF_MASK 0x00080000
#define VIP_MASK 0x00100000
#define ID_MASK 0x00200000
#define EXCP00_DIVZ 1 #define EXCP00_DIVZ 1
#define EXCP01_SSTP 2 #define EXCP01_SSTP 2
@ -158,7 +161,9 @@ typedef struct CPUX86State {
/* standard registers */ /* standard registers */
uint32_t regs[8]; uint32_t regs[8];
uint32_t eip; uint32_t eip;
uint32_t eflags; uint32_t eflags; /* eflags register. During CPU emulation, CC
flags and DF are set to zero because they are
store elsewhere */
/* emulator internal eflags handling */ /* emulator internal eflags handling */
uint32_t cc_src; uint32_t cc_src;
@ -183,13 +188,13 @@ typedef struct CPUX86State {
SegmentDescriptorTable ldt; SegmentDescriptorTable ldt;
SegmentDescriptorTable idt; SegmentDescriptorTable idt;
/* various CPU modes */
int vm86;
/* exception/interrupt handling */ /* exception/interrupt handling */
jmp_buf jmp_env; jmp_buf jmp_env;
int exception_index; int exception_index;
int interrupt_request; int interrupt_request;
/* user data */
void *opaque;
} CPUX86State; } CPUX86State;
/* all CPU memory access use these macros */ /* all CPU memory access use these macros */
@ -418,7 +423,8 @@ int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
#define GEN_FLAG_CODE32_SHIFT 0 #define GEN_FLAG_CODE32_SHIFT 0
#define GEN_FLAG_ADDSEG_SHIFT 1 #define GEN_FLAG_ADDSEG_SHIFT 1
#define GEN_FLAG_SS32_SHIFT 2 #define GEN_FLAG_SS32_SHIFT 2
#define GEN_FLAG_ST_SHIFT 3 #define GEN_FLAG_VM_SHIFT 3
#define GEN_FLAG_ST_SHIFT 4
int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size, int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size,
int *gen_code_size_ptr, int *gen_code_size_ptr,

11
exec-i386.c
View File

@ -330,9 +330,10 @@ int cpu_x86_exec(CPUX86State *env1)
#endif #endif
/* put eflags in CPU temporary format */ /* put eflags in CPU temporary format */
T0 = env->eflags; CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
op_movl_eflags_T0(); DF = 1 - (2 * ((env->eflags >> 10) & 1));
CC_OP = CC_OP_EFLAGS; CC_OP = CC_OP_EFLAGS;
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
env->interrupt_request = 0; env->interrupt_request = 0;
/* prepare setjmp context for exception handling */ /* prepare setjmp context for exception handling */
@ -354,6 +355,7 @@ int cpu_x86_exec(CPUX86State *env1)
(unsigned long)env->seg_cache[R_ES].base | (unsigned long)env->seg_cache[R_ES].base |
(unsigned long)env->seg_cache[R_SS].base) != 0) << (unsigned long)env->seg_cache[R_SS].base) != 0) <<
GEN_FLAG_ADDSEG_SHIFT; GEN_FLAG_ADDSEG_SHIFT;
flags |= (env->eflags & VM_MASK) >> (17 - GEN_FLAG_VM_SHIFT);
cs_base = env->seg_cache[R_CS].base; cs_base = env->seg_cache[R_CS].base;
pc = cs_base + env->eip; pc = cs_base + env->eip;
tb = tb_find(&ptb, (unsigned long)pc, (unsigned long)cs_base, tb = tb_find(&ptb, (unsigned long)pc, (unsigned long)cs_base,
@ -390,8 +392,7 @@ int cpu_x86_exec(CPUX86State *env1)
ret = env->exception_index; ret = env->exception_index;
/* restore flags in standard format */ /* restore flags in standard format */
op_movl_T0_eflags(); env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
env->eflags = T0;
/* restore global registers */ /* restore global registers */
#ifdef reg_EAX #ifdef reg_EAX
@ -489,7 +490,7 @@ int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
/* for glibc 2.1 */ /* for glibc 2.1 */
#define REG_EIP EIP #define REG_EIP EIP
#endif #endif
pc = uc->uc_mcontext.gregs[EIP]; pc = uc->uc_mcontext.gregs[REG_EIP];
pold_set = &uc->uc_sigmask; pold_set = &uc->uc_sigmask;
return handle_cpu_signal(pc, pold_set); return handle_cpu_signal(pc, pold_set);
#else #else