asm_luac.c

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// SPDX-License-Identifier: LGPL-3.0-only
// SPDX-FileCopyrightText: 2021 Heersin <teablearcher@gmail.com>
 
#include "librz/asm/arch/luac/lua_arch.h"
 
int rz_luac_disasm(RzAsm *a, RzAsmOp *opstruct, const ut8 *buf, int len) {
    LuaOpNameList oplist = NULL;
    int r = 0;
 
    if (!a->cpu) {
        RZ_LOG_ERROR("disassembler: lua: no version info, specify it with `asm.cpu` option\n");
        return -1;
    }
 
    if (strcmp(a->cpu, "5.4") == 0) {
        oplist = get_lua54_opnames();
        r = lua54_disasm(opstruct, buf, len, oplist);
    } else if (strcmp(a->cpu, "5.3") == 0) {
        oplist = get_lua53_opnames();
        r = lua53_disasm(opstruct, buf, len, oplist);
    } else {
        RZ_LOG_ERROR("disassembler: lua: version %s is not supported\n", a->cpu);
        return -1;
    }
 
    free_lua_opnames(oplist);
    opstruct->size = r;
    return r;
}
 
int rz_luac_asm(RzAsm *a, RzAsmOp *opstruct, const char *str) {
    int str_len = strlen(str);
    ut32 instruction = 0;
    ut8 buffer[4];
 
    if (!a->cpu) {
        RZ_LOG_ERROR("assembler: lua: no version info, specify it with `asm.cpu` option\n");
        return -1;
    }
 
    if (strcmp(a->cpu, "5.3") == 0) {
        if (!lua53_assembly(str, str_len, &instruction)) {
            return -1;
        }
    } else if (strcmp(a->cpu, "5.4") == 0) {
        if (!lua54_assembly(str, str_len, &instruction)) {
            return -1;
        }
    } else {
        RZ_LOG_ERROR("assembler: lua: version %s is not supported\n", a->cpu);
        return -1;
    }
 
    lua_set_instruction(instruction, buffer);
    rz_strbuf_setbin(&opstruct->buf, (const ut8 *)&buffer, 4);
    return 4;
}
 
RzAsmPlugin rz_asm_plugin_luac = {
    .name = "luac",
    .arch = "luac",
    .license = "LGPL3",
    .bits = 8,
    .desc = "luac disassemble plugin",
    .disassemble = &rz_luac_disasm,
    .assemble = &rz_luac_asm,
};
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_ASM,
    .data = rz_asm_plugin_luac,
    .version = RZ_VERSION
};
#endif