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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 rpath.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "rpath_macho"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_bool_t xm_binutils_macho_rpath_list(tb_stream_ref_t istream, tb_hize_t base_offset, lua_State *lua) {
tb_assert_and_check_return_val(istream && lua, tb_false);
// read Mach-O header
xm_macho_header_t header;
if (!tb_stream_seek(istream, base_offset)) {
return tb_false;
}
if (!tb_stream_bread(istream, (tb_byte_t*)&header, sizeof(header))) {
return tb_false;
}
tb_bool_t swap = tb_false;
tb_bool_t is64 = tb_false;
// check magic
if (header.magic == XM_MACHO_MAGIC_32) {
is64 = tb_false;
} else if (header.magic == XM_MACHO_MAGIC_32_BE) {
is64 = tb_false;
swap = tb_true;
} else if (header.magic == XM_MACHO_MAGIC_64) {
is64 = tb_true;
} else if (header.magic == XM_MACHO_MAGIC_64_BE) {
is64 = tb_true;
swap = tb_true;
} else {
return tb_false; // Not a Mach-O file
}
// re-read header for 64-bit if needed, or just use 32-bit part and skip reserved
tb_uint32_t ncmds = 0;
if (is64) {
xm_macho_header_64_t header64;
if (!tb_stream_seek(istream, base_offset)) {
return tb_false;
}
if (!tb_stream_bread(istream, (tb_byte_t*)&header64, sizeof(header64))) {
return tb_false;
}
xm_binutils_macho_swap_header_64(&header64, swap);
ncmds = header64.ncmds;
} else {
xm_binutils_macho_swap_header_32(&header, swap);
ncmds = header.ncmds;
}
// skip header to reach load commands
tb_size_t header_size = is64 ? sizeof(xm_macho_header_64_t) : sizeof(xm_macho_header_t);
if (!tb_stream_seek(istream, base_offset + header_size)) {
return tb_false;
}
tb_size_t result_count = 0;
// iterate load commands
for (tb_uint32_t i = 0; i < ncmds; i++) {
xm_macho_load_command_t lc;
tb_hize_t current_cmd_offset = tb_stream_offset(istream);
if (!tb_stream_bread(istream, (tb_byte_t*)&lc, sizeof(lc))) {
return tb_false;
}
xm_binutils_macho_swap_load_command(&lc, swap);
// check for LC_RPATH
if (lc.cmd == XM_MACHO_LC_RPATH) {
xm_macho_rpath_command_t rc;
if (tb_stream_seek(istream, current_cmd_offset)) {
if (tb_stream_bread(istream, (tb_byte_t*)&rc, sizeof(rc))) {
xm_binutils_macho_swap_rpath_command(&rc, swap);
tb_uint32_t name_offset = rc.path_offset;
if (name_offset < lc.cmdsize) {
// name is at current_cmd_offset + name_offset
tb_char_t rpath[TB_PATH_MAXN];
tb_size_t max_len = lc.cmdsize - name_offset;
if (max_len > sizeof(rpath) - 1) max_len = sizeof(rpath) - 1;
if (xm_binutils_read_string(istream, current_cmd_offset + name_offset, rpath, max_len + 1) && rpath[0]) {
lua_pushinteger(lua, result_count + 1);
lua_pushstring(lua, rpath);
lua_settable(lua, -3);
result_count++;
}
}
}
}
}
// move to next command
if (!tb_stream_seek(istream, current_cmd_offset + lc.cmdsize)) {
break;
}
}
return tb_true;
}
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