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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);
tb_bool_t ok = tb_false;
do {
// init Mach-O context
xm_macho_context_t context;
if (!xm_binutils_macho_context_init(istream, base_offset, &context)) break;
// skip header to reach load commands
tb_size_t header_size = context.is64 ? sizeof(xm_macho_header_64_t) : sizeof(xm_macho_header_32_t);
if (!tb_stream_seek(istream, base_offset + header_size)) break;
tb_size_t result_count = 0;
// iterate load commands
tb_uint32_t i = 0;
for (i = 0; i < context.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))) break;
xm_binutils_macho_swap_load_command(&lc, context.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, context.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];
if (xm_binutils_read_string(istream, current_cmd_offset + name_offset, rpath, sizeof(rpath))) {
if (tb_strlen(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;
}
if (i < context.ncmds) break;
ok = tb_true;
} while (0);
return ok;
}
tb_bool_t xm_binutils_macho_rpath_clean(tb_stream_ref_t istream, tb_hize_t base_offset) {
tb_assert_and_check_return_val(istream, tb_false);
tb_bool_t ok = tb_false;
tb_byte_t* buffer = tb_null;
do {
// init Mach-O context
xm_macho_context_t context;
if (!xm_binutils_macho_context_init(istream, base_offset, &context)) break;
tb_size_t header_size = context.is64 ? sizeof(xm_macho_header_64_t) : sizeof(xm_macho_header_32_t);
if (!tb_stream_seek(istream, base_offset + header_size)) break;
tb_hize_t read_offset = base_offset + header_size;
tb_hize_t write_offset = read_offset;
tb_uint32_t new_ncmds = 0;
tb_uint32_t new_sizeofcmds = 0;
tb_bool_t found = tb_false;
buffer = (tb_byte_t*)tb_malloc(64 * 1024); // 64KB should be enough for any load command
if (!buffer) break;
tb_uint32_t i = 0;
for (i = 0; i < context.ncmds; i++) {
xm_macho_load_command_t lc;
if (!tb_stream_seek(istream, read_offset)) break;
if (!tb_stream_bread(istream, (tb_byte_t*)&lc, sizeof(lc))) break;
xm_binutils_macho_swap_load_command(&lc, context.swap);
tb_bool_t remove = tb_false;
if (lc.cmd == XM_MACHO_LC_RPATH) {
remove = tb_true;
found = tb_true;
}
if (!remove) {
// copy command to write_offset
if (read_offset != write_offset) {
if (lc.cmdsize > 64 * 1024) break;
if (!tb_stream_seek(istream, read_offset)) break;
if (!tb_stream_bread(istream, buffer, lc.cmdsize)) break;
if (!tb_stream_seek(istream, write_offset)) break;
if (!tb_stream_bwrit(istream, buffer, lc.cmdsize)) break;
}
write_offset += lc.cmdsize;
new_ncmds++;
new_sizeofcmds += lc.cmdsize;
}
read_offset += lc.cmdsize;
}
if (i < context.ncmds) break;
if (found) {
// zero out the remaining space
if (read_offset > write_offset) {
tb_hize_t diff = read_offset - write_offset;
if (!tb_stream_seek(istream, write_offset)) break;
tb_byte_t zero = 0;
tb_bool_t write_ok = tb_true;
for (tb_hize_t k = 0; k < diff; k++) {
if (!tb_stream_bwrit(istream, &zero, 1)) {
write_ok = tb_false;
break;
}
}
if (!write_ok) break;
}
// update header
if (context.is64) {
context.header.header64.ncmds = new_ncmds;
context.header.header64.sizeofcmds = new_sizeofcmds;
xm_binutils_macho_swap_header_64(&context.header.header64, context.swap);
if (!tb_stream_seek(istream, base_offset)) break;
if (!tb_stream_bwrit(istream, (tb_byte_t const*)&context.header.header64, sizeof(xm_macho_header_64_t))) break;
} else {
context.header.header32.ncmds = new_ncmds;
context.header.header32.sizeofcmds = new_sizeofcmds;
xm_binutils_macho_swap_header_32(&context.header.header32, context.swap);
if (!tb_stream_seek(istream, base_offset)) break;
if (!tb_stream_bwrit(istream, (tb_byte_t const*)&context.header.header32, sizeof(xm_macho_header_32_t))) break;
}
}
ok = tb_true;
} while (0);
if (buffer) tb_free(buffer);
return ok;
}
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