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/*!A cross-platform build utility based on Lua
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file deplibs.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "deplibs_coff"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
static tb_uint32_t xm_binutils_coff_get_import_rva(tb_stream_ref_t istream, tb_uint16_t opthdr_size) {
// save current offset
tb_hize_t opt_offset = tb_stream_offset(istream);
tb_uint32_t import_rva = 0;
// read magic
tb_uint16_t magic = 0;
if (tb_stream_bread(istream, (tb_byte_t*)&magic, sizeof(magic))) {
// seek back
if (tb_stream_seek(istream, opt_offset)) {
if (magic == XM_PE32_MAGIC) {
xm_pe32_opt_header_t opt_header = {0};
if (tb_stream_bread(istream, (tb_byte_t*)&opt_header, tb_min(sizeof(opt_header), opthdr_size))) {
if (opt_header.number_of_rva_and_sizes > 1) {
import_rva = opt_header.data_directory[1].vaddr;
}
}
} else if (magic == XM_PE32P_MAGIC) {
xm_pe32p_opt_header_t opt_header = {0};
if (tb_stream_bread(istream, (tb_byte_t*)&opt_header, tb_min(sizeof(opt_header), opthdr_size))) {
if (opt_header.number_of_rva_and_sizes > 1) {
import_rva = opt_header.data_directory[1].vaddr;
}
}
}
}
}
return import_rva;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_bool_t xm_binutils_coff_deplibs(tb_stream_ref_t istream, tb_hize_t base_offset, lua_State *lua) {
tb_assert_and_check_return_val(istream && lua, tb_false);
tb_bool_t ok = tb_false;
xm_coff_section_t* sections = tb_null;
do {
// read COFF header
xm_coff_header_t header;
if (!tb_stream_seek(istream, base_offset)) break;
if (!tb_stream_bread(istream, (tb_byte_t*)&header, sizeof(header))) break;
// read optional header and import rva
tb_uint32_t import_rva = 0;
if (header.opthdr > 0) {
import_rva = xm_binutils_coff_get_import_rva(istream, header.opthdr);
}
// read section headers
if (header.nsects > 0) {
sections = tb_nalloc_type(header.nsects, xm_coff_section_t);
if (!sections) break;
tb_hize_t section_offset = base_offset + sizeof(xm_coff_header_t) + header.opthdr;
if (!tb_stream_seek(istream, section_offset)) break;
if (!tb_stream_bread(istream, (tb_byte_t*)sections, header.nsects * sizeof(xm_coff_section_t))) break;
}
if (!sections) {
if (header.nsects > 0) break;
ok = tb_true;
break;
}
tb_size_t result_count = 0;
tb_bool_t failed = tb_false;
for (tb_uint16_t i = 0; i < header.nsects; i++) {
xm_coff_section_t* section = §ions[i];
// check if it is .idata section (import directory table)
tb_bool_t found_idt = tb_false;
tb_uint32_t idt_offset = 0;
if (import_rva != 0) {
// check if import rva is in this section
if (import_rva >= section->vaddr && import_rva < section->vaddr + section->vsize) {
idt_offset = section->ofs + (import_rva - section->vaddr);
found_idt = tb_true;
}
} else {
// fallback to check section name
if (tb_strncmp(section->name, ".idata", 6) == 0) {
idt_offset = section->ofs;
found_idt = tb_true;
}
}
if (found_idt) {
/* read import directory table
* The .idata section contains the Import Directory Table.
* Each entry is 20 bytes (IMAGE_IMPORT_DESCRIPTOR).
* The table ends with a null entry.
*/
/* We need to iterate over IMAGE_IMPORT_DESCRIPTOR entries.
* struct IMAGE_IMPORT_DESCRIPTOR {
* DWORD OriginalFirstThunk; // RVA to original unbound IAT (PIMAGE_THUNK_DATA)
* DWORD TimeDateStamp; // 0 if not bound,
* DWORD ForwarderChain; // -1 if no forwarders
* DWORD Name; // RVA to DLL name
* DWORD FirstThunk; // RVA to IAT (if bound this IAT has actual addresses)
* };
*/
if (!tb_stream_seek(istream, idt_offset)) {
failed = tb_true;
break;
}
while (1) {
xm_coff_import_directory_table_t entry;
if (!tb_stream_bread(istream, (tb_byte_t*)&entry, sizeof(entry))) {
break;
}
// check for null entry (end of table)
if (entry.original_first_thunk == 0 && entry.name_rva == 0) {
break;
}
tb_uint32_t name_rva = tb_bits_le_to_ne_u32(entry.name_rva);
if (name_rva != 0) {
/* map RVA to file offset to read the name
* We need to find the section that contains this RVA.
*/
tb_hize_t saved_pos_inner = tb_stream_offset(istream);
tb_uint32_t name_file_offset = 0;
// Find the section containing name_rva
for (tb_uint16_t k = 0; k < header.nsects; k++) {
xm_coff_section_t* s = §ions[k];
if (name_rva >= s->vaddr && name_rva < s->vaddr + s->vsize) {
name_file_offset = s->ofs + (name_rva - s->vaddr);
break;
}
}
if (name_file_offset != 0) {
tb_char_t dll_name[256];
if (xm_binutils_read_string(istream, name_file_offset, dll_name, sizeof(dll_name)) && dll_name[0]) {
lua_pushinteger(lua, result_count + 1);
lua_pushstring(lua, dll_name);
lua_settable(lua, -3);
result_count++;
}
}
tb_stream_seek(istream, saved_pos_inner);
}
}
break;
}
}
tb_check_break(!failed);
ok = tb_true;
} while (0);
if (sections) tb_free(sections);
return ok;
}
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