snesdis.c File Reference

#include <rz_types.h>
#include <rz_util.h>
#include <rz_asm.h>
#include <rz_lib.h>
#include <string.h>
#include "snes_op_table.h"

Go to the source code of this file.

Functions
static int	snesDisass (int M_flag, int X_flag, ut64 pc, RzAsmOp *op, const ut8 *buf, int len)

Function Documentation

snesDisass()

static int snesDisass ( int  M_flag, int  X_flag, ut64  pc, RzAsmOp *  op, const ut8 *  buf, int  len  )

static

Definition at line 12 of file snesdis.c.

                                                                                             {
    snes_op_t *s_op = &snes_op[buf[0]];
    int op_len = snes_op_get_size(M_flag, X_flag, s_op);
    if (len < op_len) {
        return 0;
    }
    const char *buf_asm = "invalid";
    switch (s_op->len) {
    case SNES_OP_8BIT:
        buf_asm = s_op->name;
        break;
    case SNES_OP_16BIT:
        if (*buf % 0x20 == 0x10 || *buf == 0x80) { // relative branch
            buf_asm = sdb_fmt(s_op->name, (ut32)(pc + 2 + (st8)buf[1]));
        } else {
            buf_asm = sdb_fmt(s_op->name, buf[1]);
        }
        break;
    case SNES_OP_24BIT:
        if (*buf == 0x44 || *buf == 0x54) { // mvp and mvn
            buf_asm = sdb_fmt(s_op->name, buf[1], buf[2]);
        } else if (*buf == 0x82) { // brl
            buf_asm = sdb_fmt(s_op->name, pc + 3 + (st16)rz_read_le16(buf + 1));
        } else {
            buf_asm = sdb_fmt(s_op->name, rz_read_le16(buf + 1));
        }
        break;
    case SNES_OP_32BIT:
        buf_asm = sdb_fmt(s_op->name, buf[1] | buf[2] << 8 | buf[3] << 16);
        break;
    case SNES_OP_IMM_M:
        if (M_flag) {
            buf_asm = sdb_fmt("%s #0x%02x", s_op->name, buf[1]);
        } else {
            buf_asm = sdb_fmt("%s #0x%04x", s_op->name, rz_read_le16(buf + 1));
        }
        break;
    case SNES_OP_IMM_X:
        if (X_flag) {
            buf_asm = sdb_fmt("%s #0x%02x", s_op->name, buf[1]);
        } else {
            buf_asm = sdb_fmt("%s #0x%04x", s_op->name, rz_read_le16(buf + 1));
        }
        break;
    }
    rz_strbuf_set(&op->buf_asm, buf_asm);
    return op_len;
}

References len, snes_op_t::len, snes_op_t::name, pc, rz_read_le16(), rz_strbuf_set(), sdb_fmt(), snes_op, SNES_OP_16BIT, SNES_OP_24BIT, SNES_OP_32BIT, SNES_OP_8BIT, snes_op_get_size(), SNES_OP_IMM_M, SNES_OP_IMM_X, st16, and st8.

Referenced by _6502Disass(), and dis().