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crater
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Start working on argument disassembler.

master
Ben Kurtovic 8 years ago
parent
89d3d65cde
commit
dd83c7bddf
3 changed files with 282 additions and 17 deletions
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  1. +6
    -17
      src/disassembler.c
  2. +266
    -0
      src/disassembler/arguments.c
  3. +10
    -0
      src/disassembler/arguments.h

+ 6
- 17
src/disassembler.c View File

@@ -2,6 +2,7 @@
Released under the terms of the MIT License. See LICENSE for details. */

#include "disassembler.h"
#include "disassembler/arguments.h"
#include "disassembler/mnemonics.h"
#include "disassembler/sizes.h"
#include "util.h"
@@ -29,18 +30,6 @@ static char* format_bytestring(const uint8_t *bytes, size_t size)
}

/*
Extract the arguments for the given instruction.

The return value must be free()d.
*/
static char* decode_argument(const uint8_t *bytes)
{
// TODO
(void) bytes;
return NULL;
}

/*
Free the given DisasInstr struct.
*/
void disas_instr_free(DisasInstr *instr)
@@ -61,13 +50,13 @@ DisasInstr* disassemble_instruction(const uint8_t *bytes)
size_t size = get_instr_size(bytes);
char *bytestr = format_bytestring(bytes, size);
char *mnemonic = decode_mnemonic(bytes);
char *arg = decode_argument(bytes);
char *args = decode_arguments(bytes);
char *line;

if (arg) {
line = cr_malloc(strlen(mnemonic) + strlen(arg) + 2);
sprintf(line, "%s\t%s", mnemonic, arg);
free(arg);
if (args) {
line = cr_malloc(strlen(mnemonic) + strlen(args) + 2);
sprintf(line, "%s\t%s", mnemonic, args);
free(args);
} else {
line = cr_strdup(mnemonic);
}


+ 266
- 0
src/disassembler/arguments.c View File

@@ -0,0 +1,266 @@
/* Copyright (C) 2014-2016 Ben Kurtovic <ben.kurtovic@gmail.com>
Released under the terms of the MIT License. See LICENSE for details. */

#include <stddef.h>

#include "arguments.h"
#include "../logging.h"
#include "../util.h"

#define MAX_ARG_SIZE 256

typedef enum {
AT_NONE,
/* Register */
AT_REG_A, AT_REG_B, AT_REG_C, AT_REG_D, AT_REG_E, AT_REG_H,
AT_REG_L, AT_REG_I, AT_REG_R, AT_REG_AF, AT_REG_BC, AT_REG_DE,
AT_REG_HL, AT_REG_IX, AT_REG_IY, AT_REG_SP, AT_REG_AF_, AT_REG_IXH,
AT_REG_IXL, AT_REG_IYH, AT_REG_IYL,
/* Immediate */
AT_IMM_U16, AT_IMM_U8, AT_IMM_S8, AT_IMM_REL, AT_IMM_BIT, AT_IMM_RST,
AT_IMM_IM,
/* Indirect */
AT_IDR_HL, AT_IDR_BC, AT_IDR_DE, AT_IDR_SP, AT_IDR_IMM,
/* Indexed */
AT_IDX_IX, AT_IDX_IY,
/* Condition */
AT_COND_NZ, AT_COND_Z, AT_COND_NC, AT_COND_C, AT_COND_PO, AT_COND_PE,
AT_COND_P, AT_COND_M,
/* Port */
AT_PORT_C, AT_PORT_IM
} ArgType;

#define __ AT_NONE
#define A_ AT_REG_A
#define B_ AT_REG_B
#define C_ AT_REG_C
#define D_ AT_REG_D
#define E_ AT_REG_E
#define H_ AT_REG_H
#define L_ AT_REG_L
#define I_ AT_REG_I
#define R_ AT_REG_R
#define AF AT_REG_AF
#define BC AT_REG_BC
#define DE AT_REG_DE
#define HL AT_REG_HL
#define IX AT_REG_IX
#define IY AT_REG_IY
#define SP AT_REG_SP
#define AS AT_REG_AF_
#define XH AT_REG_IXH
#define XL AT_REG_IXL
#define YH AT_REG_IYH
#define YL AT_REG_IYL
#define M2 AT_IMM_U16
#define M1 AT_IMM_U8
#define MS AT_IMM_S8
#define ML AT_IMM_REL
#define MB AT_IMM_BIT
#define MR AT_IMM_RST
#define MI AT_IMM_IM
#define NH AT_IDR_HL
#define NB AT_IDR_BC
#define ND AT_IDR_DE
#define NS AT_IDR_SP
#define NM AT_IDR_IMM
#define DX AT_IDX_IX
#define DY AT_IDX_IY
#define NZ AT_COND_NZ
#define Z_ AT_COND_Z
#define NC AT_COND_NC
#define CC AT_COND_C
#define PO AT_COND_PO
#define PE AT_COND_PE
#define P_ AT_COND_P
#define M_ AT_COND_M
#define PC AT_PORT_C
#define PM AT_PORT_IM

static ArgType instr_args[3][256] = {
{
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, A_, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
},
{
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
},
{
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
}
};

#undef __
#undef A_
#undef B_
#undef C_
#undef D_
#undef E_
#undef H_
#undef L_
#undef I_
#undef R_
#undef AF
#undef BC
#undef DE
#undef HL
#undef IX
#undef IY
#undef SP
#undef AS
#undef XH
#undef XL
#undef YH
#undef YL
#undef M2
#undef M1
#undef MS
#undef ML
#undef MB
#undef MR
#undef MI
#undef NH
#undef NB
#undef ND
#undef NS
#undef NM
#undef DX
#undef DY
#undef NZ
#undef Z_
#undef NC
#undef CC
#undef PO
#undef PE
#undef P_
#undef M_
#undef PC
#undef PM

/*
Decode a single argument, given its type.
*/
static void decode_argument(char *arg, ArgType type, const uint8_t *bytes)
{
switch (type) {
case AT_NONE: arg[0] = '\0'; break;
case AT_REG_A: strcpy(arg, "a"); break;
case AT_REG_B: strcpy(arg, "b"); break;
case AT_REG_C: strcpy(arg, "c"); break;
case AT_REG_D: strcpy(arg, "d"); break;
case AT_REG_E: strcpy(arg, "e"); break;
case AT_REG_H: strcpy(arg, "h"); break;
case AT_REG_L: strcpy(arg, "l"); break;
case AT_REG_I: strcpy(arg, "i"); break;
case AT_REG_R: strcpy(arg, "r"); break;
case AT_REG_AF: strcpy(arg, "af"); break;
case AT_REG_BC: strcpy(arg, "bc"); break;
case AT_REG_DE: strcpy(arg, "de"); break;
case AT_REG_HL: strcpy(arg, "hl"); break;
case AT_REG_IX: strcpy(arg, "ix"); break;
case AT_REG_IY: strcpy(arg, "iy"); break;
case AT_REG_SP: strcpy(arg, "sp"); break;
case AT_REG_AF_: strcpy(arg, "af'"); break;
case AT_REG_IXH: strcpy(arg, "ixh"); break;
case AT_REG_IXL: strcpy(arg, "ixl"); break;
case AT_REG_IYH: strcpy(arg, "iyh"); break;
case AT_REG_IYL: strcpy(arg, "iyl"); break;
case AT_IMM_U16: strcpy(arg, "???"); break; // TODO
case AT_IMM_U8: strcpy(arg, "???"); break; // TODO
case AT_IMM_S8: strcpy(arg, "???"); break; // TODO
case AT_IMM_REL: strcpy(arg, "???"); break; // TODO
case AT_IMM_BIT: strcpy(arg, "???"); break; // TODO
case AT_IMM_RST: strcpy(arg, "???"); break; // TODO
case AT_IMM_IM: strcpy(arg, "???"); break; // TODO
case AT_IDR_HL: strcpy(arg, "(hl)"); break;
case AT_IDR_BC: strcpy(arg, "(bc)"); break;
case AT_IDR_DE: strcpy(arg, "(de)"); break;
case AT_IDR_SP: strcpy(arg, "(sp)"); break;
case AT_IDR_IMM: strcpy(arg, "???"); break; // TODO
case AT_IDX_IX: strcpy(arg, "???"); break; // TODO
case AT_IDX_IY: strcpy(arg, "???"); break; // TODO
case AT_COND_NZ: strcpy(arg, "nz"); break;
case AT_COND_Z: strcpy(arg, "z"); break;
case AT_COND_NC: strcpy(arg, "nc"); break;
case AT_COND_C: strcpy(arg, "c"); break;
case AT_COND_PO: strcpy(arg, "po"); break;
case AT_COND_PE: strcpy(arg, "pe"); break;
case AT_COND_P: strcpy(arg, "p"); break;
case AT_COND_M: strcpy(arg, "m"); break;
case AT_PORT_C: strcpy(arg, "(c)"); break;
case AT_PORT_IM: strcpy(arg, "???"); break; // TODO
default:
FATAL("invalid call: decode_argument(%u, ...)", type)
}
}

/*
Extract the arguments for the given instruction.

The return value must be free()d.
*/
char* decode_arguments(const uint8_t *bytes)
{
char args[3][MAX_ARG_SIZE], *result;
ArgType type;
size_t i;

for (i = 0; i < 3; i++) {
type = instr_args[i][bytes[0]];
decode_argument(args[i], type, bytes);
}

if (!*args[0])
return NULL;
if (!*args[1])
return cr_strdup(args[0]);
if (!*args[2])
// TODO
return NULL;
// TODO
return NULL;
}

+ 10
- 0
src/disassembler/arguments.h View File

@@ -0,0 +1,10 @@
/* Copyright (C) 2014-2016 Ben Kurtovic <ben.kurtovic@gmail.com>
Released under the terms of the MIT License. See LICENSE for details. */

#pragma once

#include <stdint.h>

/* Functions */

char* decode_arguments(const uint8_t*);

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