spc700dis.c File Reference

#include <rz_types.h>
#include <rz_asm.h>
#include <stdio.h>
#include <string.h>
#include "spc700_opcode_table.h"

Go to the source code of this file.

Functions
static ut64	spc700_op_size (Spc700ArgType arg)
static ut64	spc700_resolve_relative (ut64 pc, ut8 r)
static size_t	spc700_disas (RzStrBuf *out, ut64 pc, const ut8 *buf, size_t bufsz)

Function Documentation

spc700_disas()

static size_t spc700_disas ( RzStrBuf *  out, ut64  pc, const ut8 *  buf, size_t  bufsz  )

static

Definition at line 36 of file spc700dis.c.

                                                                                 {
    if (!bufsz) {
        return 0;
    }
    const Spc700Op *sop = &spc700_op_table[buf[0]];
    ut64 opsz = spc700_op_size(sop->arg);
    if (bufsz < (ut64)opsz) {
        return 0;
    }
    if (!out) {
        return opsz;
    }
    switch (sop->arg) {
    case SPC700_ARG_NONE:
        rz_strbuf_set(out, sop->name);
        break;
    case SPC700_ARG_IMM8:
    case SPC700_ARG_ABS8:
    case SPC700_ARG_UPPER8:
        rz_strbuf_setf(out, sop->name, (unsigned int)buf[1]);
        break;
    case SPC700_ARG_ABS8_REL8:
        rz_strbuf_setf(out, sop->name,
            (unsigned int)buf[1],
            (unsigned int)spc700_resolve_relative(pc + 3, buf[2]));
        break;
    case SPC700_ARG_ABS16:
        rz_strbuf_setf(out, sop->name, (unsigned int)buf[1] | ((unsigned int)buf[2] << 8));
        break;
    case SPC700_ARG_ABS13_BIT3:
        rz_strbuf_setf(out, sop->name,
            (unsigned int)((ut16)buf[1] | ((ut16)(buf[2] & 0x1f) << 8)),
            (unsigned int)(buf[2] >> 5));
        break;
    case SPC700_ARG_REL8:
        rz_strbuf_setf(out, sop->name,
            (unsigned int)spc700_resolve_relative(pc + 2, buf[1]));
        break;
    case SPC700_ARG_IMM8_ABS8:
    case SPC700_ARG_ABS8_ABS8:
        rz_strbuf_setf(out, sop->name, (unsigned int)buf[2], (unsigned int)buf[1]);
        break;
    default:
        rz_strbuf_set(out, "invalid");
        break;
    }
    return opsz;
}

References out, pc, rz_strbuf_set(), rz_strbuf_setf(), SPC700_ARG_ABS13_BIT3, SPC700_ARG_ABS16, SPC700_ARG_ABS8, SPC700_ARG_ABS8_ABS8, SPC700_ARG_ABS8_REL8, SPC700_ARG_IMM8, SPC700_ARG_IMM8_ABS8, SPC700_ARG_NONE, SPC700_ARG_REL8, SPC700_ARG_UPPER8, spc700_op_size(), spc700_op_table, spc700_resolve_relative(), and ut64().

Referenced by disassemble(), and op().

spc700_op_size()

static ut64 spc700_op_size ( Spc700ArgType  arg )

static

Definition at line 10 of file spc700dis.c.

                                              {
    switch (arg) {
    case SPC700_ARG_NONE:
        return 1;
    case SPC700_ARG_IMM8:
    case SPC700_ARG_ABS8:
    case SPC700_ARG_REL8:
    case SPC700_ARG_UPPER8:
        return 2;
    case SPC700_ARG_ABS8_REL8:
    case SPC700_ARG_ABS8_ABS8:
    case SPC700_ARG_ABS16:
    case SPC700_ARG_ABS13_BIT3:
    case SPC700_ARG_IMM8_ABS8:
        return 3;
    }
    return 0;
}

References SPC700_ARG_ABS13_BIT3, SPC700_ARG_ABS16, SPC700_ARG_ABS8, SPC700_ARG_ABS8_ABS8, SPC700_ARG_ABS8_REL8, SPC700_ARG_IMM8, SPC700_ARG_IMM8_ABS8, SPC700_ARG_NONE, SPC700_ARG_REL8, and SPC700_ARG_UPPER8.

Referenced by spc700_disas().

spc700_resolve_relative()

static ut64 spc700_resolve_relative ( ut64  pc, ut8  r  )

static

Definition at line 29 of file spc700dis.c.

                                                    {
    ut16 spc = (ut16)pc;
    ut16 relpc = (ut16)(st16)(st8)r;
    spc += relpc;
    return (ut64)spc;
}

References pc, r, st16, st8, and ut64().

Referenced by spc700_disas().