193 lines
4.1 KiB
C
193 lines
4.1 KiB
C
// The OS/K Team licenses this file to you under the MIT license.
|
|
// See the LICENSE file in the project root for more information.
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <stdarg.h>
|
|
|
|
#define log printf
|
|
#define vlog vprintf
|
|
|
|
#define packed __attribute__ ((__packed__))
|
|
#define static_assert _Static_assert
|
|
#define alignof _Alignof
|
|
|
|
typedef unsigned int bool;
|
|
typedef unsigned char uchar;
|
|
typedef unsigned short ushort;
|
|
typedef unsigned int uint;
|
|
typedef unsigned long ulong;
|
|
|
|
typedef struct reg_t reg_t;
|
|
typedef struct ctx_t ctx_t;
|
|
typedef struct instr_t instr_t;
|
|
typedef struct acc_t acc_t;
|
|
typedef struct arch_t arch_t;
|
|
|
|
enum
|
|
{
|
|
INV,
|
|
RAX, RBX, RCX, RDX, RDI, RSI, RBP, RSP,
|
|
R8, R9, R10, R11, R12, R13, R14, R15,
|
|
K0, K1, K2, K3, K4, K5, K6, K7,
|
|
CR0, CR1, CR2, CR3, CR4, CR5, CR6, CR7,
|
|
RIP, FLG,
|
|
|
|
NREGS
|
|
};
|
|
|
|
enum
|
|
{
|
|
GPR = 1 << 0, // General
|
|
CTL = 1 << 1, // Control
|
|
SEG = 1 << 2, // Segment
|
|
RES = 1 << 8, // Reserved for insternal use
|
|
SYS = 1 << 9, // Reserved for supervisor mode
|
|
};
|
|
|
|
// FLG register
|
|
enum
|
|
{
|
|
CF = 1 << 0, // Carry flag
|
|
PF = 1 << 1, // Parity flag
|
|
AC = 1 << 2, // Auxiliary flag
|
|
ZF = 1 << 3, // Zero flag
|
|
OV = 1 << 4, // Overflow flag
|
|
DF = 1 << 5, // Direction flag
|
|
SF = 1 << 6, // Sign flag
|
|
|
|
UF = 1 << 16, // User-mode flag
|
|
IF = 1 << 17, // Interrupts enable flag
|
|
};
|
|
|
|
struct reg_t
|
|
{
|
|
char *name;
|
|
char *desc;
|
|
ulong val;
|
|
ulong flags;
|
|
};
|
|
|
|
// A_REG is implicit
|
|
// A_MEM denotes a memory access
|
|
// A_OFF is A_MEM but a 16-bit offset is expected immediatly next
|
|
enum
|
|
{
|
|
A_REG = 0,
|
|
|
|
A_MEM8 = 0x7001,
|
|
A_MEM16 = 0x7002,
|
|
A_MEM32 = 0x7004,
|
|
A_MEM64 = 0x7008,
|
|
|
|
A_OFF8 = 0x7701,
|
|
A_OFF16 = 0x7702,
|
|
A_OFF32 = 0x7704,
|
|
A_OFF64 = 0x7708,
|
|
|
|
A_IMM16 = 0x7772,
|
|
A_IMM32 = 0x7774,
|
|
A_IMM64 = 0x7778
|
|
};
|
|
|
|
#define A_IS_MEM(x) ((x) >= A_MEM8 && (x) <= A_MEM64)
|
|
#define A_IS_OFF(x) ((x) >= A_OFF8 && (x) <= A_OFF64)
|
|
#define A_IS_IMM(x) ((x) >= A_IMM16)
|
|
|
|
#define A_IS_8(x) ((x) & 0xF == 1)
|
|
#define A_IS_16(x) ((x) & 0xF == 2)
|
|
#define A_IS_32(x) ((x) & 0xF == 3)
|
|
#define A_IS_64(x) ((x) & 0xF == 4)
|
|
|
|
struct acc_t
|
|
{
|
|
bool mem;
|
|
uint len;
|
|
uint type;
|
|
|
|
ulong val;
|
|
short off;
|
|
};
|
|
|
|
enum { NOPREF, PREF_REP=0x8000, PREF_LOCK, NPREFS };
|
|
|
|
#define ISPREF(x) ((x) & 0x8000 && (x)<NPREFS)
|
|
#define ISINSTR(x) ((x) < NINSTRS)
|
|
|
|
enum { NOPRM, P_REG, P_IMM, P_MEM=4 };
|
|
|
|
struct instr_t
|
|
{
|
|
char *name;
|
|
char *full;
|
|
|
|
uint prm1;
|
|
uint prm2;
|
|
|
|
void (*func)(ctx_t *, acc_t *, acc_t *);
|
|
};
|
|
|
|
struct ctx_t
|
|
{
|
|
reg_t *r;
|
|
instr_t *i;
|
|
|
|
// Memory and memory size
|
|
ushort *mp;
|
|
ulong mz;
|
|
|
|
// Read next instruction
|
|
ushort (*get)(ctx_t *ctx);
|
|
|
|
// For disassembly
|
|
FILE *disf;
|
|
};
|
|
|
|
enum
|
|
{
|
|
E_SHT, // Shutdown instruction
|
|
E_IMP, // Not implemented
|
|
E_ILL, // Ill-formed
|
|
E_ACC, // Invalid access
|
|
E_SYS, // Supervisor only
|
|
E_ALI, // Alignment error
|
|
E_STK, // Stack error
|
|
NEXCPTS
|
|
};
|
|
|
|
void dumpregs(ctx_t *);
|
|
void dumpinstr(ctx_t *, ulong, ushort, acc_t *, acc_t *);
|
|
void dumpmem(ctx_t *, ulong, ulong);
|
|
void dumpfwstack(ctx_t *);
|
|
|
|
void _except(ctx_t *, int, char *, ...);
|
|
|
|
void disasm(ctx_t *ctx);
|
|
void decode(ctx_t *ctx);
|
|
|
|
#define MEMOFF (1 * 1024 * 1024)
|
|
#define MEMSIZE (16 * 1024 * 1024) // 16MB
|
|
|
|
#define addr2real(p) (((p) - MEMOFF) / 2)
|
|
#define real2addr(p) (((p) + MEMOFF) / 2)
|
|
|
|
// Address of boot firmware stack
|
|
#define FWSTACK (MEMOFF * 2) // 2MB
|
|
|
|
ulong readmem8(ctx_t *, ulong addr);
|
|
ulong readmem16(ctx_t *, ulong addr);
|
|
ulong readmem32(ctx_t *, ulong addr);
|
|
ulong readmem64(ctx_t *, ulong addr);
|
|
ulong readmem(ctx_t *c, ulong addr, uint len);
|
|
|
|
void writemem8(ctx_t *, ulong val, ulong addr);
|
|
void writemem16(ctx_t *, ulong val, ulong addr);
|
|
void writemem32(ctx_t *, ulong val, ulong addr);
|
|
void writemem64(ctx_t *, ulong val, ulong addr);
|
|
void writemem(ctx_t *, ulong val, ulong addr, uint len);
|
|
|
|
#include "arch_i.h"
|
|
|