parse_53.c File Reference

#include "luac_specs_53.h"

Go to the source code of this file.

Functions
static void	lua_load_block (RzBuffer *buffer, void *dest, size_t size, ut64 offset, ut64 data_size)
static ut64	lua_load_integer (RzBuffer *buffer, ut64 offset)
static double	lua_load_number (RzBuffer *buffer, ut64 offset)
static ut32	lua_load_int (RzBuffer *buffer, ut64 offset)
static ut64	lua_parse_line_defined (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_string (RzBuffer *buffer, ut8 **dest, int *str_len, ut64 offset, ut64 data_size)
static ut64	lua_parse_name (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_code (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_const_entry (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_consts (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_upvalue_entry (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_upvalues (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_debug (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
static ut64	lua_parse_protos (LuaProto *proto, RzBuffer *buffer, ut64 offset, ut64 data_size)
LuaProto *	lua_parse_body_53 (RzBuffer *buffer, ut64 base_offset, ut64 data_size)
RzBinInfo *	lua_parse_header_53 (RzBinFile *bf, st32 major, st32 minor)

Function Documentation

lua_load_block()

static void lua_load_block ( RzBuffer *  buffer, void *  dest, size_t  size, ut64  offset, ut64  data_size  )

static

Definition at line 7 of file parse_53.c.

                                                                                                   {
    if (offset + size > data_size) {
        RZ_LOG_ERROR("Truncated load block at 0x%llx\n", offset);
        return;
    }
    rz_buf_read_at(buffer, offset, dest, size);
}

References dest, rz_buf_read_at(), and RZ_LOG_ERROR.

Referenced by lua_parse_const_entry().

lua_load_int()

static ut32 lua_load_int ( RzBuffer *  buffer, ut64  offset  )

static

Definition at line 27 of file parse_53.c.

                                                        {
    ut32 x = 0;
    rz_buf_read_le32_at(buffer, offset, &x);
    return x;
}

References rz_buf_read_le32_at, and x.

Referenced by lua_parse_code(), lua_parse_consts(), lua_parse_debug(), lua_parse_line_defined(), lua_parse_protos(), and lua_parse_upvalues().

lua_load_integer()

static ut64 lua_load_integer ( RzBuffer *  buffer, ut64  offset  )

static

Definition at line 15 of file parse_53.c.

                                                            {
    ut64 x = 0;
    rz_buf_read_le64_at(buffer, offset, &x);
    return x;
}

References rz_buf_read_le64_at, ut64(), and x.

Referenced by lua_parse_header_53().

lua_load_number()

static double lua_load_number ( RzBuffer *  buffer, ut64  offset  )

static

Definition at line 21 of file parse_53.c.

                                                             {
    double x = 0;
    rz_buf_read_le64_at(buffer, offset, (ut64 *)&x);
    return x;
}

References rz_buf_read_le64_at, ut64(), and x.

Referenced by lua_parse_header_53().

lua_parse_body_53()

LuaProto* lua_parse_body_53	(	RzBuffer *	buffer,
		ut64	base_offset,
		ut64	data_size
	)

Definition at line 407 of file parse_53.c.

                                                                                {
    ut64 offset;
    ut64 delta_offset;
 
    LuaProto *ret_proto = lua_new_proto_entry();
    if (!ret_proto) {
        return NULL;
    }
 
    // start parsing
    offset = base_offset;
 
    // record offset of main proto
    ret_proto->offset = offset;
 
    // parse proto name
    delta_offset = lua_parse_name(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* parse line defined info */
    delta_offset = lua_parse_line_defined(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* parse num params max_stack_size */
    if (offset + 3 > data_size) {
        lua_free_proto_entry(ret_proto);
        return NULL;
    }
    if (!rz_buf_read8_at(buffer, offset + 0, &ret_proto->num_params) ||
        !rz_buf_read8_at(buffer, offset + 1, &ret_proto->is_vararg) ||
        !rz_buf_read8_at(buffer, offset + 2, &ret_proto->max_stack_size)) {
        lua_free_proto_entry(ret_proto);
        return NULL;
    }
    offset += 3;
 
    /* parse code */
    ret_proto->code_offset = offset;
    delta_offset = lua_parse_code(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* parse constants */
    ret_proto->const_offset = offset;
    delta_offset = lua_parse_consts(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* parse upvalues */
    ret_proto->upvalue_offset = offset;
    delta_offset = lua_parse_upvalues(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* parse inner protos */
    ret_proto->inner_proto_offset = offset;
    delta_offset = lua_parse_protos(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    /* specially handle recursive protos size */
    ret_proto->inner_proto_size = offset - ret_proto->inner_proto_offset;
 
    /* parse debug */
    ret_proto->debug_offset = offset;
    delta_offset = lua_parse_debug(ret_proto, buffer, offset, data_size);
    lua_check_error_offset_proto(delta_offset, ret_proto);
    offset += delta_offset;
 
    ret_proto->size = offset - base_offset + 1;
 
    return ret_proto;
}

References lua_proto_ex::code_offset, lua_proto_ex::const_offset, lua_proto_ex::debug_offset, lua_proto_ex::inner_proto_offset, lua_proto_ex::inner_proto_size, lua_proto_ex::is_vararg, lua_check_error_offset_proto, lua_free_proto_entry(), lua_new_proto_entry(), lua_parse_code(), lua_parse_consts(), lua_parse_debug(), lua_parse_line_defined(), lua_parse_name(), lua_parse_protos(), lua_parse_upvalues(), lua_proto_ex::max_stack_size, NULL, lua_proto_ex::num_params, lua_proto_ex::offset, rz_buf_read8_at(), lua_proto_ex::size, lua_proto_ex::upvalue_offset, and ut64().

Referenced by load_buffer(), and lua_parse_protos().

lua_parse_code()

static ut64 lua_parse_code ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 105 of file parse_53.c.

                                                                                           {
    ut64 size_offset;
    ut64 total_size;
    int code_size;
 
    size_offset = sizeof(LUA_INT);
    if (size_offset + offset > data_size) {
        return 0;
    }
    code_size = lua_load_int(buffer, offset);
    total_size = code_size * 4 + size_offset;
 
    if (total_size + offset > data_size) {
        RZ_LOG_ERROR("Truncated Code at [0x%llx]\n", offset);
        return 0;
    }
 
    /* Set Proto Member */
    proto->code_size = code_size * 4;
    proto->code_skipped = size_offset;
 
    return total_size;
}

References lua_proto_ex::code_size, lua_proto_ex::code_skipped, lua_load_int(), RZ_LOG_ERROR, and ut64().

Referenced by lua_parse_body_53().

lua_parse_const_entry()

static ut64 lua_parse_const_entry ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 129 of file parse_53.c.

                                                                                                  {
    LuaConstEntry *current_entry;
    ut64 base_offset;
    ut8 *recv_data;
    ut64 delta_offset;
    int data_len;
 
    current_entry = lua_new_const_entry();
    current_entry->offset = offset;
    base_offset = offset;
    delta_offset = 0;
 
    /* read TAG byte */
    if (offset + 1 > data_size) {
        return 0;
    }
    if (!rz_buf_read8_at(buffer, offset, &current_entry->tag)) {
        return 0;
    }
    offset += 1;
 
    ut8 tmp;
 
    /* read data */
    // TODO : check tag Macro
    // RIGHT : 0x843
    switch (current_entry->tag) {
    case LUA_TNUMFLT:
        data_len = sizeof(LUA_NUMBER);
        recv_data = RZ_NEWS(ut8, data_len);
        lua_load_block(buffer, recv_data, data_len, offset, data_size);
        if (offset + data_len > data_size) {
            return 0;
        }
        delta_offset = data_len;
        current_entry->tag = LUA_VNUMFLT; // keep the same with 5.4 tag
        break;
    case LUA_TNUMINT:
        data_len = sizeof(LUA_INTEGER);
        recv_data = RZ_NEWS(ut8, data_len);
        lua_load_block(buffer, recv_data, data_len, offset, data_size);
        if (offset + data_len > data_size) {
            return 0;
        }
        delta_offset = data_len;
        current_entry->tag = LUA_VNUMINT; // keep the same with 5.4 tag
        break;
    case LUA_VSHRSTR:
    case LUA_VLNGSTR:
        delta_offset = lua_parse_string(buffer, &recv_data, &data_len, offset, data_size);
        lua_check_error_offset(delta_offset);
        break;
    // BOOLEAN
    case LUA_TBOOLEAN:
        if (!rz_buf_read8_at(buffer, offset, &tmp)) {
            return 0;
        }
 
        current_entry->tag = tmp == 0 ? LUA_VFALSE : LUA_VTRUE;
        recv_data = NULL;
        data_len = 0;
        delta_offset = 1;
        break;
    // NIL
    case LUA_TNIL:
    default:
        recv_data = NULL;
        current_entry->tag = LUA_VNIL;
        data_len = 0;
        delta_offset = 0;
        break;
    }
 
    offset += delta_offset;
 
    current_entry->data = recv_data;
    current_entry->data_len = data_len;
 
    /* add to list */
    rz_list_append(proto->const_entries, current_entry);
 
    return offset - base_offset;
}

References lua_proto_ex::const_entries, lua_constant_entry::data, lua_constant_entry::data_len, lua_check_error_offset, lua_load_block(), lua_new_const_entry(), lua_parse_string(), LUA_TBOOLEAN, LUA_TNIL, LUA_TNUMFLT, LUA_TNUMINT, LUA_VFALSE, LUA_VLNGSTR, LUA_VNIL, LUA_VNUMFLT, LUA_VNUMINT, LUA_VSHRSTR, LUA_VTRUE, NULL, lua_constant_entry::offset, rz_buf_read8_at(), rz_list_append(), RZ_NEWS, lua_constant_entry::tag, autogen_x86imm::tmp, and ut64().

Referenced by lua_parse_consts().

lua_parse_consts()

static ut64 lua_parse_consts ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 213 of file parse_53.c.

                                                                                             {
    int consts_cnt;
    int i;
    ut64 base_offset;
    ut64 delta_offset;
 
    base_offset = offset;
 
    /* parse number of constants */
    if (offset + sizeof(LUA_INT) > data_size) {
        return 0;
    }
    consts_cnt = lua_load_int(buffer, offset);
    delta_offset = sizeof(LUA_INT);
    offset += delta_offset;
 
    for (i = 0; i < consts_cnt; ++i) {
        // add an entry of constant
        delta_offset = lua_parse_const_entry(proto, buffer, offset, data_size);
        lua_check_error_offset(delta_offset);
        offset += delta_offset;
    }
 
    proto->const_size = offset - base_offset + 1;
    return offset - base_offset;
}

References lua_proto_ex::const_size, i, lua_check_error_offset, lua_load_int(), lua_parse_const_entry(), and ut64().

Referenced by lua_parse_body_53().

lua_parse_debug()

static ut64 lua_parse_debug ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 295 of file parse_53.c.

                                                                                            {
    int entries_cnt;
    int i;
    ut64 base_offset;
    ut64 delta_offset;
 
    base_offset = offset;
 
    /* parse line info */
    if (offset + sizeof(LUA_INT) > data_size) {
        return 0;
    }
    entries_cnt = lua_load_int(buffer, offset);
    offset += sizeof(LUA_INT);
    LuaLineinfoEntry *info_entry;
    for (i = 0; i < entries_cnt; ++i) {
        info_entry = lua_new_lineinfo_entry();
        info_entry->offset = offset;
        info_entry->info_data = lua_load_int(buffer, offset);
        rz_list_append(proto->line_info_entries, info_entry);
        offset += sizeof(int);
    }
 
    /* no parse absline info */
 
    /* parse local vars */
    if (offset + sizeof(LUA_INT) > data_size) {
        return 0;
    }
    entries_cnt = lua_load_int(buffer, offset);
    offset += sizeof(LUA_INT);
    LuaLocalVarEntry *var_entry;
    for (i = 0; i < entries_cnt; ++i) {
        var_entry = lua_new_local_var_entry();
        var_entry->offset = offset;
 
        /* string */
        delta_offset = lua_parse_string(
            buffer,
            &var_entry->varname, &var_entry->varname_len,
            offset, data_size);
        lua_check_error_offset(delta_offset);
        offset += delta_offset;
 
        /* start pc && end pc -- int */
        if (offset + sizeof(LUA_INT) + sizeof(LUA_INT) > data_size) {
            return 0;
        }
        var_entry->start_pc = lua_load_int(buffer, offset);
        offset += sizeof(LUA_INT);
 
        /* end pc -- int */
        var_entry->end_pc = lua_load_int(buffer, offset);
        offset += sizeof(LUA_INT);
 
        rz_list_append(proto->local_var_info_entries, var_entry);
    }
 
    /* parse upvalue */
    if (offset + sizeof(LUA_INT) > data_size) {
        return 0;
    }
    entries_cnt = lua_load_int(buffer, offset);
    offset += sizeof(LUA_INT);
    LuaDbgUpvalueEntry *dbg_upvalue_entry;
    for (i = 0; i < entries_cnt; ++i) {
        dbg_upvalue_entry = lua_new_dbg_upvalue_entry();
        dbg_upvalue_entry->offset = offset;
 
        delta_offset = lua_parse_string(
            buffer,
            &dbg_upvalue_entry->upvalue_name, &dbg_upvalue_entry->name_len,
            offset, data_size);
        lua_check_error_offset(delta_offset);
        offset += delta_offset;
 
        rz_list_append(proto->dbg_upvalue_entries, dbg_upvalue_entry);
    }
 
    proto->debug_size = offset - base_offset + 1;
    return offset - base_offset;
}

References lua_proto_ex::dbg_upvalue_entries, lua_proto_ex::debug_size, lua_local_var_entry::end_pc, i, lua_lineinfo_entry::info_data, int, lua_proto_ex::line_info_entries, lua_proto_ex::local_var_info_entries, lua_check_error_offset, lua_load_int(), lua_new_dbg_upvalue_entry(), lua_new_lineinfo_entry(), lua_new_local_var_entry(), lua_parse_string(), lua_dbg_upvalue_entry::name_len, lua_lineinfo_entry::offset, lua_local_var_entry::offset, lua_dbg_upvalue_entry::offset, rz_list_append(), lua_local_var_entry::start_pc, lua_dbg_upvalue_entry::upvalue_name, ut64(), lua_local_var_entry::varname, and lua_local_var_entry::varname_len.

Referenced by lua_parse_body_53().

lua_parse_header_53()

RzBinInfo* lua_parse_header_53	(	RzBinFile *	bf,
		st32	major,
		st32	minor
	)

Definition at line 483 of file parse_53.c.

                                                                      {
    RzBinInfo *ret = NULL;
    RzBuffer *buffer;
 
    st64 reat = bf->size;
    if (reat < LUAC_53_HDRSIZE) {
        RZ_LOG_ERROR("Truncated header\n");
        return NULL;
    }
    buffer = bf->buf;
 
    /* read header members from work buffer */
    ut8 luac_format;
    if (!rz_buf_read8_at(buffer, LUAC_53_FORMAT_OFFSET, &luac_format)) {
        return NULL;
    }
    ut8 int_size;
    if (!rz_buf_read8_at(buffer, LUAC_53_INT_SIZE_OFFSET, &int_size)) {
        return NULL;
    }
    ut8 sizet_size;
    if (!rz_buf_read8_at(buffer, LUAC_53_SIZET_SIZE_OFFSET, &sizet_size)) {
        return NULL;
    }
    ut8 instruction_size;
    if (!rz_buf_read8_at(buffer, LUAC_53_INSTRUCTION_SIZE_OFFSET, &instruction_size)) {
        return NULL;
    }
    ut8 integer_size;
    if (!rz_buf_read8_at(buffer, LUAC_53_INTEGER_SIZE_OFFSET, &integer_size)) {
        return NULL;
    }
    ut8 number_size;
    if (!rz_buf_read8_at(buffer, LUAC_53_NUMBER_SIZE_OFFSET, &number_size)) {
        return NULL;
    }
    ut64 integer_valid = lua_load_integer(buffer, LUAC_53_INTEGER_VALID_OFFSET);
    double number_valid = lua_load_number(buffer, LUAC_53_NUMBER_VALID_OFFSET);
 
    /* Common Ret */
    if (!(ret = RZ_NEW0(RzBinInfo))) {
        return NULL;
    }
    ret->file = rz_str_new(bf->file);
    ret->type = rz_str_newf("Lua %c.%c compiled file", major + '0', minor + '0');
    ret->bclass = rz_str_new("Lua compiled file");
    ret->rclass = rz_str_new("luac");
    ret->arch = rz_str_new("luac");
    ret->machine = rz_str_newf("Lua %c.%c VM", major + '0', minor + '0');
    ret->os = rz_str_newf("%c.%c", major + '0', minor + '0');
    ret->cpu = rz_str_newf("%c.%c", major + '0', minor + '0');
    ret->bits = 8;
 
    /* official format ? */
    if (luac_format != LUAC_54_FORMAT) {
        ret->compiler = rz_str_new("Unofficial Lua Compiler");
        return ret;
    }
    ret->compiler = rz_str_new("Official Lua Compiler");
 
    /* Check Size */
    // TODO : remove this check and process different compiler options
    if ((instruction_size != sizeof(LUA_INSTRUCTION)) ||
        (integer_size != sizeof(LUA_INTEGER)) ||
        (number_size != sizeof(LUA_NUMBER)) ||
        (int_size != sizeof(LUA_INT)) ||
        (sizet_size != sizeof(size_t))) {
        RZ_LOG_ERROR("Size definition does not match with the expected size\n");
        return ret;
    }
 
    /* Check endian */
    if (integer_valid != LUAC_53_INT_VALIDATION) {
        RZ_LOG_ERROR("Integer format does not match with the expected integer\n");
        return ret;
    } else if (number_valid != LUAC_53_NUMBER_VALIDATION) {
        RZ_LOG_ERROR("Number format does not match with the expected number\n");
        return ret;
    }
 
    /* parse source file name */
    char *src_file_name = NULL;
    int name_len;
    lua_parse_string(buffer, ((ut8 **)&(src_file_name)), &name_len, LUAC_FILENAME_OFFSET, bf->size);
 
    /* put source file info into GUID */
    ret->guid = rz_str_new(src_file_name ? src_file_name : "stripped");
    free(src_file_name);
 
    return ret;
}

References rz_bin_info_t::arch, rz_bin_info_t::bclass, rz_bin_info_t::bits, rz_bin_file_t::buf, rz_bin_info_t::compiler, rz_bin_info_t::cpu, rz_bin_info_t::file, rz_bin_file_t::file, free(), rz_bin_info_t::guid, lua_load_integer(), lua_load_number(), lua_parse_string(), LUAC_53_FORMAT_OFFSET, LUAC_53_HDRSIZE, LUAC_53_INSTRUCTION_SIZE_OFFSET, LUAC_53_INT_SIZE_OFFSET, LUAC_53_INT_VALIDATION, LUAC_53_INTEGER_SIZE_OFFSET, LUAC_53_INTEGER_VALID_OFFSET, LUAC_53_NUMBER_SIZE_OFFSET, LUAC_53_NUMBER_VALID_OFFSET, LUAC_53_NUMBER_VALIDATION, LUAC_53_SIZET_SIZE_OFFSET, LUAC_54_FORMAT, LUAC_FILENAME_OFFSET, rz_bin_info_t::machine, major, minor, NULL, rz_bin_info_t::os, rz_bin_info_t::rclass, rz_buf_read8_at(), RZ_LOG_ERROR, RZ_NEW0, rz_str_new(), rz_str_newf(), rz_bin_file_t::size, st64, rz_bin_info_t::type, and ut64().

Referenced by load_buffer().

lua_parse_line_defined()

static ut64 lua_parse_line_defined ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 33 of file parse_53.c.

                                                                                                   {
    ut64 size_offset;
    int line_defined;
    int last_line_defined;
 
    size_offset = sizeof(LUA_INT) + sizeof(LUA_INT);
 
    if (size_offset + offset > data_size) {
        return 0;
    }
    line_defined = lua_load_int(buffer, offset);
    offset += size_offset;
    last_line_defined = lua_load_int(buffer, offset);
 
    /* Set Proto Member */
    proto->line_defined = line_defined;
    proto->lastline_defined = last_line_defined;
 
    return size_offset;
}

References lua_proto_ex::lastline_defined, lua_proto_ex::line_defined, lua_load_int(), and ut64().

Referenced by lua_parse_body_53().

lua_parse_name()

static ut64 lua_parse_name ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 101 of file parse_53.c.

                                                                                           {
    return lua_parse_string(buffer, &proto->proto_name, &proto->name_size, offset, data_size);
}

References lua_parse_string(), lua_proto_ex::name_size, and lua_proto_ex::proto_name.

Referenced by lua_parse_body_53().

lua_parse_protos()

static ut64 lua_parse_protos ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 378 of file parse_53.c.

                                                                                             {
    rz_return_val_if_fail(proto, 0);
 
    int proto_cnt;
    int i;
    ut64 base_offset;
    ut64 delta_offset;
 
    base_offset = offset; // store origin offset
 
    delta_offset = sizeof(LUA_INT);
    if (offset + delta_offset > data_size) {
        return 0;
    }
    proto_cnt = lua_load_int(buffer, offset);
    offset += delta_offset;
 
    LuaProto *current_proto;
    for (i = 0; i < proto_cnt; ++i) {
        current_proto = lua_parse_body_53(buffer, offset, data_size);
        lua_return_if_null(current_proto);
        rz_list_append(proto->proto_entries, current_proto);
        offset += current_proto->size - 1; // update offset
    }
 
    // return the delta between offset and base_offset
    return offset - base_offset;
}

References i, lua_load_int(), lua_parse_body_53(), lua_return_if_null, lua_proto_ex::proto_entries, rz_list_append(), rz_return_val_if_fail, lua_proto_ex::size, and ut64().

Referenced by lua_parse_body_53().

lua_parse_string()

static ut64 lua_parse_string ( RzBuffer *  buffer, ut8 **  dest, int *  str_len, ut64  offset, ut64  data_size  )

static

Definition at line 54 of file parse_53.c.

                                                                                                      {
    ut8 string_buf_size;
    if (!rz_buf_read8_at(buffer, offset, &string_buf_size)) {
        return 0;
    }
 
    int len = 0;
    ut64 base_offset = 0;
    ut64 size_offset = 1;
    ut8 *ret;
 
    base_offset = offset;
 
    // Long string
    if (string_buf_size == 0xFF) {
        offset += size_offset;
        if (!rz_buf_read8_at(buffer, offset, &string_buf_size)) {
            return 0;
        }
        size_offset = 1;
    }
 
    offset += size_offset;
 
    if (string_buf_size == 0 || size_offset == 0) {
        ret = NULL;
        len = 0;
    } else {
        len = string_buf_size - 1;
        if ((ret = RZ_NEWS(ut8, string_buf_size)) == NULL) {
            len = 0;
        } else {
            rz_buf_read_at(buffer, offset, ret, len);
            ret[len] = 0x00;
        }
    }
 
    if (dest && str_len) {
        *dest = ret;
        *str_len = len;
    } else {
        RZ_LOG_ERROR("Cannot store string\n");
    }
 
    return offset + len - base_offset;
}

References dest, len, NULL, rz_buf_read8_at(), rz_buf_read_at(), RZ_LOG_ERROR, RZ_NEWS, and ut64().

Referenced by lua_parse_const_entry(), lua_parse_debug(), lua_parse_header_53(), and lua_parse_name().

lua_parse_upvalue_entry()

static ut64 lua_parse_upvalue_entry ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 240 of file parse_53.c.

                                                                                                    {
    LuaUpvalueEntry *current_entry;
    ut64 base_offset;
 
    base_offset = offset;
    current_entry = lua_new_upvalue_entry();
    current_entry->offset = base_offset;
 
    if (offset + 2 > data_size) {
        return 0;
    }
 
    /* read instack/idx attr */
    // no kind in lua 5.3
    if (!rz_buf_read8_at(buffer, offset + 0, &current_entry->instack) ||
        !rz_buf_read8_at(buffer, offset + 1, &current_entry->idx)) {
        return 0;
    }
    current_entry->kind = 0;
 
    offset += 2;
 
    /* add to list */
    rz_list_append(proto->upvalue_entries, current_entry);
 
    return offset - base_offset;
}

References lua_upvalue_entry::idx, lua_upvalue_entry::instack, lua_upvalue_entry::kind, lua_new_upvalue_entry(), lua_upvalue_entry::offset, rz_buf_read8_at(), rz_list_append(), lua_proto_ex::upvalue_entries, and ut64().

Referenced by lua_parse_upvalues().

lua_parse_upvalues()

static ut64 lua_parse_upvalues ( LuaProto *  proto, RzBuffer *  buffer, ut64  offset, ut64  data_size  )

static

Definition at line 268 of file parse_53.c.

                                                                                               {
    int upvalues_cnt;
    int i;
    ut64 base_offset;
    ut64 delta_offset;
 
    base_offset = offset;
 
    /* parse number of upvalues */
    delta_offset = sizeof(LUA_INT);
    if (delta_offset + offset > data_size) {
        return 0;
    }
    upvalues_cnt = lua_load_int(buffer, offset);
    offset += delta_offset;
 
    for (i = 0; i < upvalues_cnt; ++i) {
        delta_offset = lua_parse_upvalue_entry(proto, buffer, offset, data_size);
        lua_check_error_offset(delta_offset);
        offset += delta_offset;
    }
 
    proto->upvalue_size = offset - base_offset + 1;
 
    return offset - base_offset;
}

References i, lua_check_error_offset, lua_load_int(), lua_parse_upvalue_entry(), lua_proto_ex::upvalue_size, and ut64().

Referenced by lua_parse_body_53().