cpu-i386.h

   1 /* NOTE: this header is included in op-i386.c where global register
   2    variable are used. Care must be used when including glibc headers.
   3  */
   4 #ifndef CPU_I386_H
   5 #define CPU_I386_H
   6
   7 #include <setjmp.h>
   8
   9 #define R_EAX 0
  10 #define R_ECX 1
  11 #define R_EDX 2
  12 #define R_EBX 3
  13 #define R_ESP 4
  14 #define R_EBP 5
  15 #define R_ESI 6
  16 #define R_EDI 7
  17
  18 #define R_AL 0
  19 #define R_CL 1
  20 #define R_DL 2
  21 #define R_BL 3
  22 #define R_AH 4
  23 #define R_CH 5
  24 #define R_DH 6
  25 #define R_BH 7
  26
  27 #define R_ES 0
  28 #define R_CS 1
  29 #define R_SS 2
  30 #define R_DS 3
  31 #define R_FS 4
  32 #define R_GS 5
  33
  34 #define CC_C    0x0001
  35 #define CC_P    0x0004
  36 #define CC_A    0x0010
  37 #define CC_Z    0x0040
  38 #define CC_S    0x0080
  39 #define CC_O    0x0800
  40
  41 #define TRAP_FLAG               0x0100
  42 #define INTERRUPT_FLAG          0x0200
  43 #define DIRECTION_FLAG          0x0400
  44 #define IOPL_FLAG_MASK          0x3000
  45 #define NESTED_FLAG             0x4000
  46 #define BYTE_FL                 0x8000  /* Intel reserved! */
  47 #define RF_FLAG                 0x10000
  48 #define VM_FLAG                 0x20000
  49 /* AC                           0x40000 */
  50
  51 #define EXCP00_DIVZ     1
  52 #define EXCP01_SSTP     2
  53 #define EXCP02_NMI      3
  54 #define EXCP03_INT3     4
  55 #define EXCP04_INTO     5
  56 #define EXCP05_BOUND    6
  57 #define EXCP06_ILLOP    7
  58 #define EXCP07_PREX     8
  59 #define EXCP08_DBLE     9
  60 #define EXCP09_XERR     10
  61 #define EXCP0A_TSS      11
  62 #define EXCP0B_NOSEG    12
  63 #define EXCP0C_STACK    13
  64 #define EXCP0D_GPF      14
  65 #define EXCP0E_PAGE     15
  66 #define EXCP10_COPR     17
  67 #define EXCP11_ALGN     18
  68 #define EXCP12_MCHK     19
  69
  70 #define EXCP_SIGNAL     256 /* async signal */
  71
  72 enum {
  73     CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
  74     CC_OP_EFLAGS,  /* all cc are explicitely computed, CC_SRC = flags */
  75     CC_OP_MUL, /* modify all flags, C, O = (CC_SRC != 0) */
  76
  77     CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
  78     CC_OP_ADDW,
  79     CC_OP_ADDL,
  80
  81     CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
  82     CC_OP_SUBW,
  83     CC_OP_SUBL,
  84
  85     CC_OP_LOGICB, /* modify all flags, CC_DST = res */
  86     CC_OP_LOGICW,
  87     CC_OP_LOGICL,
  88
  89     CC_OP_INCB, /* modify all flags except, CC_DST = res */
  90     CC_OP_INCW,
  91     CC_OP_INCL,
  92
  93     CC_OP_DECB, /* modify all flags except, CC_DST = res */
  94     CC_OP_DECW,
  95     CC_OP_DECL,
  96
  97     CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
  98     CC_OP_SHLW,
  99     CC_OP_SHLL,
 100
 101     CC_OP_NB,
 102 };
 103
 104 #ifdef __i386__
 105 #define USE_X86LDOUBLE
 106 #endif
 107
 108 #ifdef USE_X86LDOUBLE
 109 typedef long double CPU86_LDouble;
 110 #else
 111 typedef double CPU86_LDouble;
 112 #endif
 113
 114 typedef struct CPUX86State {
 115     /* standard registers */
 116     uint32_t regs[8];
 117     uint32_t pc; /* cs_case + eip value */
 118     uint32_t eflags;
 119
 120     /* emulator internal eflags handling */
 121     uint32_t cc_src;
 122     uint32_t cc_dst;
 123     uint32_t cc_op;
 124     int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
 125
 126     /* segments */
 127     uint8_t *segs_base[6];
 128
 129     /* FPU state */
 130     unsigned int fpstt; /* top of stack index */
 131     unsigned int fpus;
 132     unsigned int fpuc;
 133     uint8_t fptags[8];   /* 0 = valid, 1 = empty */
 134     CPU86_LDouble fpregs[8];
 135
 136     /* segments */
 137     uint32_t segs[6];
 138
 139     /* emulator internal variables */
 140
 141     CPU86_LDouble ft0;
 142
 143     /* exception handling */
 144     jmp_buf jmp_env;
 145     int exception_index;
 146 } CPUX86State;
 147
 148 static inline int ldub(void *ptr)
 149 {
 150     return *(uint8_t *)ptr;
 151 }
 152
 153 static inline int ldsb(void *ptr)
 154 {
 155     return *(int8_t *)ptr;
 156 }
 157
 158 static inline int lduw(void *ptr)
 159 {
 160     return *(uint16_t *)ptr;
 161 }
 162
 163 static inline int ldsw(void *ptr)
 164 {
 165     return *(int16_t *)ptr;
 166 }
 167
 168 static inline int ldl(void *ptr)
 169 {
 170     return *(uint32_t *)ptr;
 171 }
 172
 173 static inline uint64_t ldq(void *ptr)
 174 {
 175     return *(uint64_t *)ptr;
 176 }
 177
 178 static inline void stb(void *ptr, int v)
 179 {
 180     *(uint8_t *)ptr = v;
 181 }
 182
 183 static inline void stw(void *ptr, int v)
 184 {
 185     *(uint16_t *)ptr = v;
 186 }
 187
 188 static inline void stl(void *ptr, int v)
 189 {
 190     *(uint32_t *)ptr = v;
 191 }
 192
 193 static inline void stq(void *ptr, int v)
 194 {
 195     *(uint64_t *)ptr = v;
 196 }
 197
 198 /* float access */
 199
 200 static inline float ldfl(void *ptr)
 201 {
 202     return *(float *)ptr;
 203 }
 204
 205 static inline double ldfq(void *ptr)
 206 {
 207     return *(double *)ptr;
 208 }
 209
 210 static inline void stfl(void *ptr, float v)
 211 {
 212     *(float *)ptr = v;
 213 }
 214
 215 static inline void stfq(void *ptr, double v)
 216 {
 217     *(double *)ptr = v;
 218 }
 219
 220 #ifndef IN_OP_I386
 221 void cpu_x86_outb(int addr, int val);
 222 void cpu_x86_outw(int addr, int val);
 223 void cpu_x86_outl(int addr, int val);
 224 int cpu_x86_inb(int addr);
 225 int cpu_x86_inw(int addr);
 226 int cpu_x86_inl(int addr);
 227 #endif
 228
 229 CPUX86State *cpu_x86_init(void);
 230 int cpu_x86_exec(CPUX86State *s);
 231 void cpu_x86_close(CPUX86State *s);
 232
 233 /* internal functions */
 234 int cpu_x86_gen_code(uint8_t *gen_code_buf, int *gen_code_size_ptr,
 235                      uint8_t *pc_start);
 236
 237 #endif /* CPU_I386_H */