ref: b9745c60a1bf2a3876e411d38c67a0980d70e3a3
dir: /sys/src/cmd/aux/realemu/dat.h/
typedef struct Iarg Iarg; typedef struct Inst Inst; typedef struct Bus Bus; typedef struct Cpu Cpu; typedef struct Pit Pit; enum { RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI, RES, RCS, RSS, RDS, RFS, RGS, R0S, /* 0 segment */ RIP, RFL, NREG, }; struct Iarg { Cpu *cpu; uchar tag; uchar len; uchar atype; union { uchar reg; struct { uchar sreg; ulong seg, off; }; ulong val; }; }; struct Inst { uchar op; uchar code; uchar olen; uchar alen; Iarg *a1, *a2, *a3; uchar rep; uchar mod; uchar reg; uchar rm; uchar scale; uchar index; uchar base; uchar sreg; uchar dsreg; ulong off; long disp; }; struct Bus { void *aux; ulong (*r)(void *aux, ulong off, int len); void (*w)(void *aux, ulong off, ulong data, int len); }; struct Cpu { ulong reg[NREG]; /* instruction counter */ ulong ic; /* mem[16], one entry for each 64k block */ Bus *mem; /* port[1], in/out */ Bus *port; int trap; ulong oldip; jmp_buf jmp; /* default operand, address and stack pointer length */ uchar olen, alen, slen; /* argument buffers */ ulong iabuf; Iarg abuf[0x80]; }; struct Pit { ulong count; /* set by setgate(), cleared by clockpit() */ uchar gateraised; /* signals */ uchar gate; uchar out; /* mode and flags */ uchar count0; uchar bcd; uchar amode; uchar omode; /* latch for wpit initial count */ uchar wcount; uchar wlatched; uchar wlatch[2]; /* latch for rpit status/count */ uchar rcount; uchar rlatched; uchar rlatch[2]; }; /* processor flags */ enum { CF = 1<<0, /* carry flag */ PF = 1<<2, /* parity flag */ AF = 1<<4, /* aux carry flag */ ZF = 1<<6, /* zero flag */ SF = 1<<7, /* sign flag */ TF = 1<<8, /* trap flag */ IF = 1<<9, /* interrupts enabled flag */ DF = 1<<10, /* direction flag */ OF = 1<<11, /* overflow flag */ IOPL= 3<<12, /* I/O privelege level */ NT = 1<<14, /* nested task */ RF = 1<<16, /* resume flag */ VM = 1<<17, /* virtual-8086 mode */ AC = 1<<18, /* alignment check */ VIF = 1<<19, /* virtual interrupt flag */ VIP = 1<<20, /* virtual interrupt pending */ ID = 1<<21, /* ID flag */ }; /* interrupts/traps */ enum { EDIV0, EDEBUG, ENMI, EBRK, EINTO, EBOUND, EBADOP, ENOFPU, EDBLF, EFPUSEG, EBADTSS, ENP, ESTACK, EGPF, EPF, EHALT = 256, /* pseudo-interrupts */ EMEM, EIO, }; /* argument tags */ enum { TREG, TMEM, TCON, TH = 0x80, /* special flag for AH,BH,CH,DH */ }; /* argument types */ enum { ANONE, /* no argument */ A0, /* constant 0 */ A1, /* constant 1 */ A2, /* constant 2 */ A3, /* constant 3 */ A4, /* constant 4 */ AAp, /* 32-bit or 48-bit direct address */ AEb, /* r/m8 from modrm byte */ AEv, /* r/m16 or r/m32 from modrm byte */ AEw, /* r/m16 */ AFv, /* flag word */ AGb, /* r8 from modrm byte */ AGv, /* r16 or r32 from modrm byte */ AGw, /* r/m16 */ AIb, /* immediate byte */ AIc, /* immediate byte sign-extended */ AIw, /* immediate 16-bit word */ AIv, /* immediate 16-bit or 32-bit word */ AJb, /* relative offset byte */ AJv, /* relative offset 16-bit or 32-bit word */ AJr, /* r/m16 or r/m32 register */ AM, /* memory address from modrm */ AMa, /* something for bound */ AMa2, AMp, /* 32-bit or 48-bit memory address */ AOb, /* immediate word-sized offset to a byte */ AOv, /* immediate word-size offset to a word */ ASw, /* segment register selected by r field of modrm */ AXb, /* byte at DS:SI */ AXv, /* word at DS:SI */ AYb, /* byte at ES:DI */ AYv, /* word at ES:DI */ AAL, ACL, ADL, ABL, AAH, ACH, ADH, ABH, AAX, ACX, ADX, ABX, ASP, ABP, ASI, ADI, AES, ACS, ASS, ADS, AFS, AGS, NATYPE, }; /* operators */ enum { OBAD, O0F, OAAA, OAAD, OAAM, OAAS, OADC, OADD, OAND, OARPL, OASIZE, OBOUND, OBT, OBTS, OBTR, OBTC, OBSF, OBSR, OCALL, OCBW, OCLC, OCLD, OCLI, OCMC, OCMOV, OCMP, OCMPS, OCPUID, OCWD, ODAA, ODAS, ODEC, ODIV, OENTER, OGP1, OGP2, OGP3b, OGP3v, OGP4, OGP5, OGP8, OGP10, OGP12, OHLT, OIDIV, OIMUL, OIN, OINC, OINS, OINT, OIRET, OJUMP, OLAHF, OLEA, OLEAVE, OLFP, OLOCK, OLODS, OLOOP, OLOOPNZ, OLOOPZ, OMOV, OMOVS, OMOVZX, OMOVSX, OMUL, ONEG, ONOP, ONOT, OOR, OOSIZE, OOUT, OOUTS, OPOP, OPOPA, OPOPF, OPUSH, OPUSHA, OPUSHF, ORCL, ORCR, OREPE, OREPNE, ORET, ORETF, OROL, OROR, OSAHF, OSAR, OSBB, OSCAS, OSEG, OSET, OSHL, OSHLD, OSHR, OSHRD, OSTC, OSTD, OSTI, OSTOS, OSUB, OTEST, OWAIT, OXCHG, OXLAT, OXOR, NUMOP, };