analysis_propeller.c

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// SPDX-FileCopyrightText: 2012-2013 pancake <pancake@nopcode.org>
// SPDX-FileCopyrightText: 2014 Fedor Sakharov <fedor.sakharov@gmail.com>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <string.h>
#include <rz_types.h>
#include <rz_lib.h>
#include <rz_asm.h>
#include <rz_analysis.h>
#include <rz_util.h>
 
#include <propeller_disas.h>
 
static int propeller_op(RzAnalysis *analysis, RzAnalysisOp *op, ut64 addr, const ut8 *buf, int len, RzAnalysisOpMask mask) {
    rz_return_val_if_fail(analysis && op && buf, -1);
    if (len < 4) {
        RZ_LOG_WARN("Couldn't disassemble instruction at 0x%x. Less than 4 bytes were provided.\n", (ut32)addr);
        return -1;
    }
    int ret;
    struct propeller_cmd cmd;
 
    memset(&cmd, 0, sizeof(cmd));
 
    ret = op->size = propeller_decode_command(buf, &cmd);
 
    if (ret < 0) {
        return ret;
    }
 
    op->addr = addr;
 
    switch (cmd.opcode) {
    case PROP_TEST:
    case PROP_TESTN:
    case PROP_TJNZ:
    case PROP_TJZ:
    case PROP_CMPS:
    case PROP_CMPSUB:
        op->type = RZ_ANALYSIS_OP_TYPE_CMP;
        break;
    case PROP_ADD:
    case PROP_ADDX:
    case PROP_ADDABS:
        op->type = RZ_ANALYSIS_OP_TYPE_ADD;
        break;
    case PROP_OR:
        op->type = RZ_ANALYSIS_OP_TYPE_OR;
        break;
    case PROP_RCL:
    case PROP_ROL:
    case PROP_SHL:
        op->type = RZ_ANALYSIS_OP_TYPE_ROL;
        break;
    case PROP_RCR:
    case PROP_ROR:
    case PROP_SHR:
        op->type = RZ_ANALYSIS_OP_TYPE_ROR;
        break;
    case PROP_NEG:
        op->type = RZ_ANALYSIS_OP_TYPE_AND;
        break;
    case PROP_XOR:
        op->type = RZ_ANALYSIS_OP_TYPE_XOR;
        break;
    case PROP_ABS:
    case PROP_MINS:
    case PROP_MIN:
    case PROP_MAX:
    case PROP_MAXS:
    case PROP_RDBYTE:
    case PROP_RDLONG:
    case PROP_RDWORD:
    case PROP_MOV:
    case PROP_MOVD:
    case PROP_MOVI:
    case PROP_MOVS:
    case PROP_WAITVID:
    case PROP_MUXC:
        if (cmd.opcode == PROP_MOV && cmd.dst == 0x44 && cmd.src == 0x3c) {
            op->type = RZ_ANALYSIS_OP_TYPE_RET;
        } else {
            op->type = RZ_ANALYSIS_OP_TYPE_MOV;
        }
        break;
    case PROP_SUB:
        op->type = RZ_ANALYSIS_OP_TYPE_SUB;
        break;
    case PROP_JMP:
    case PROP_DJNZ:
        if (cmd.immed == 0) {
            op->type = RZ_ANALYSIS_OP_TYPE_CJMP;
            op->jump = 0x20 + cmd.src;
            op->fail = addr + 2;
        } else {
            op->type = RZ_ANALYSIS_OP_TYPE_UJMP;
            op->fail = addr + 2;
        }
        break;
    default:
        op->type = RZ_ANALYSIS_OP_TYPE_UNK;
        break;
    }
 
    return ret;
}
 
RzAnalysisPlugin rz_analysis_plugin_propeller = {
    .name = "propeller",
    .desc = "Parallax propeller code analysis plugin",
    .license = "LGPL3",
    .arch = "propeller",
    .bits = 32,
    .op = propeller_op,
};