mirror of
https://github.com/rui314/mold.git
synced 2024-11-14 07:18:42 +03:00
275 lines
11 KiB
C++
275 lines
11 KiB
C++
#include "mold.h"
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#include "../archive-file.h"
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#include "../cmdline.h"
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#include "../output-file.h"
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#include <cstdlib>
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#include <fcntl.h>
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#include <iomanip>
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#include <iostream>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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namespace mold::macho {
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static void create_internal_file(Context &ctx) {
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ObjectFile *obj = new ObjectFile;
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ctx.obj_pool.push_back(std::unique_ptr<ObjectFile>(obj));
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ctx.objs.push_back(obj);
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auto add = [&](std::string_view name, u64 value = 0) {
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Symbol *sym = intern(ctx, name);
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sym->file = obj;
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sym->value = value;
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obj->syms.push_back(sym);
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};
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add("__dyld_private");
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add("__mh_execute_header", PAGE_ZERO_SIZE);
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obj->syms.push_back(intern(ctx, "dyld_stub_binder"));
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}
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static void add_section(Context &ctx, OutputSection &osec,
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std::string_view segname, std::string_view sectname) {
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for (ObjectFile *obj : ctx.objs) {
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for (std::unique_ptr<InputSection> &sec : obj->sections) {
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if (sec->hdr.segname == segname && sec->hdr.sectname == sectname) {
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for (Subsection &subsec : sec->subsections)
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osec.members.push_back(&subsec);
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sec->osec = &osec;
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}
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}
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}
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}
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static void create_synthetic_chunks(Context &ctx) {
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ctx.segments.push_back(&ctx.text_seg);
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ctx.segments.push_back(&ctx.data_const_seg);
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ctx.segments.push_back(&ctx.data_seg);
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ctx.segments.push_back(&ctx.linkedit_seg);
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ctx.text_seg.chunks.push_back(&ctx.mach_hdr);
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ctx.text_seg.chunks.push_back(&ctx.load_cmd);
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ctx.text_seg.chunks.push_back(&ctx.padding);
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ctx.padding.hdr.size = 14808;
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ctx.text.hdr.attr = S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS;
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ctx.text.hdr.p2align = 4;
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add_section(ctx, ctx.text, "__TEXT", "__text");
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ctx.text_seg.chunks.push_back(&ctx.text);
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ctx.text_seg.chunks.push_back(&ctx.stubs);
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ctx.text_seg.chunks.push_back(&ctx.stub_helper);
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OutputSection *cstring = new OutputSection("__cstring");
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cstring->hdr.type = S_CSTRING_LITERALS;
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add_section(ctx, *cstring, "__TEXT", "__cstring");
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ctx.text_seg.chunks.push_back(cstring);
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ctx.text_seg.chunks.push_back(&ctx.unwind_info);
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ctx.data_const_seg.chunks.push_back(&ctx.got);
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ctx.data_seg.chunks.push_back(&ctx.lazy_symbol_ptr);
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ctx.data_seg.chunks.push_back(&ctx.data);
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ctx.linkedit_seg.chunks.push_back(&ctx.rebase);
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ctx.linkedit_seg.chunks.push_back(&ctx.bind);
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ctx.linkedit_seg.chunks.push_back(&ctx.lazy_bind);
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ctx.linkedit_seg.chunks.push_back(&ctx.export_);
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ctx.linkedit_seg.chunks.push_back(&ctx.function_starts);
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ctx.linkedit_seg.chunks.push_back(&ctx.symtab);
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ctx.linkedit_seg.chunks.push_back(&ctx.indir_symtab);
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ctx.linkedit_seg.chunks.push_back(&ctx.strtab);
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}
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static void fill_symtab(Context &ctx) {
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ctx.symtab.add(ctx, "__dyld_private", N_SECT, false, 8, 0x0, 0x100008008);
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ctx.symtab.add(ctx, "__mh_execute_header", N_SECT, true, 1, 0x10, 0x100000000);
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ctx.symtab.add(ctx, "_hello", N_SECT, true, 1, 0x0, 0x100003f50);
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ctx.symtab.add(ctx, "_main", N_SECT, true, 1, 0x0, 0x100003f70);
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ctx.symtab.add(ctx, "_printf", N_UNDF, true, 0, 0x100, 0x0);
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ctx.symtab.add(ctx, "dyld_stub_binder", N_UNDF, true, 0, 0x100, 0x0);
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ctx.strtab.hdr.size = align_to(ctx.strtab.hdr.size, 8);
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}
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static void export_symbols(Context &ctx) {
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ctx.stubs.add(ctx, *intern(ctx, "_printf"), 1, 0, 3, 0);
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}
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static i64 assign_offsets(Context &ctx) {
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i64 fileoff = 0;
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i64 vmaddr = PAGE_ZERO_SIZE;
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for (OutputSegment *seg : ctx.segments) {
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seg->set_offset(ctx, fileoff, vmaddr);
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fileoff += seg->cmd.filesize;
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vmaddr += seg->cmd.vmsize;
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}
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return fileoff;
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}
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static void fix_synthetic_symbol_values(Context &ctx) {
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intern(ctx, "__dyld_private")->value = ctx.data.hdr.addr;
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}
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void read_file(Context &ctx, MappedFile<Context> *mf) {
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switch (get_file_type(mf)) {
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case FileType::MACH_OBJ:
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ctx.objs.push_back(ObjectFile::create(ctx, mf));
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return;
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default:
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Fatal(ctx) << mf->name << ": unknown file type";
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}
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}
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int main(int argc, char **argv) {
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Context ctx;
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if (argc > 1 && std::string_view(argv[1]) == "-dump") {
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if (argc != 3)
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Fatal(ctx) << "usage: ld64.mold -dump <executable-name>\n";
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dump_file(argv[2]);
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exit(0);
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}
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if (argc > 1 && std::string_view(argv[1]) == "-yamltest") {
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std::vector<YamlNode> nodes = parse_yaml(ctx, R"(
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--- !tapi-tbd
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tbd-version: 4
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targets: [ x86_64-macos, x86_64-maccatalyst, arm64-macos, arm64-maccatalyst,
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arm64e-macos, arm64e-maccatalyst ]
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uuids:
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- target: x86_64-macos
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value: 89E331F9-9A00-3EA4-B49F-FA2B91AE9182
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- target: x86_64-maccatalyst
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value: 89E331F9-9A00-3EA4-B49F-FA2B91AE9182
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- target: arm64-macos
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value: 00000000-0000-0000-0000-000000000000
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- target: arm64-maccatalyst
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value: 00000000-0000-0000-0000-000000000000
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- target: arm64e-macos
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value: A9F7E132-0FFC-31FC-83C6-3848CA460DF3
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- target: arm64e-maccatalyst
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value: A9F7E132-0FFC-31FC-83C6-3848CA460DF3
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install-name: '/usr/lib/libSystem.B.dylib'
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current-version: 1292.100.5
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reexported-libraries:
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- targets: [ x86_64-macos, x86_64-maccatalyst, arm64-macos, arm64-maccatalyst,
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arm64e-macos, arm64e-maccatalyst ]
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libraries: [ '/usr/lib/system/libcache.dylib', '/usr/lib/system/libcommonCrypto.dylib',
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'/usr/lib/system/libcompiler_rt.dylib', '/usr/lib/system/libcopyfile.dylib',
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'/usr/lib/system/libcorecrypto.dylib', '/usr/lib/system/libdispatch.dylib',
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'/usr/lib/system/libdyld.dylib', '/usr/lib/system/libkeymgr.dylib',
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'/usr/lib/system/liblaunch.dylib', '/usr/lib/system/libmacho.dylib',
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'/usr/lib/system/libquarantine.dylib', '/usr/lib/system/libremovefile.dylib',
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'/usr/lib/system/libsystem_asl.dylib', '/usr/lib/system/libsystem_blocks.dylib',
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'/usr/lib/system/libsystem_c.dylib', '/usr/lib/system/libsystem_collections.dylib',
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'/usr/lib/system/libsystem_configuration.dylib', '/usr/lib/system/libsystem_containermanager.dylib',
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'/usr/lib/system/libsystem_coreservices.dylib', '/usr/lib/system/libsystem_darwin.dylib',
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'/usr/lib/system/libsystem_dnssd.dylib', '/usr/lib/system/libsystem_featureflags.dylib',
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'/usr/lib/system/libsystem_info.dylib', '/usr/lib/system/libsystem_kernel.dylib',
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'/usr/lib/system/libsystem_m.dylib', '/usr/lib/system/libsystem_malloc.dylib',
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'/usr/lib/system/libsystem_networkextension.dylib', '/usr/lib/system/libsystem_notify.dylib',
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'/usr/lib/system/libsystem_platform.dylib', '/usr/lib/system/libsystem_product_info_filter.dylib',
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'/usr/lib/system/libsystem_pthread.dylib', '/usr/lib/system/libsystem_sandbox.dylib',
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'/usr/lib/system/libsystem_secinit.dylib', '/usr/lib/system/libsystem_symptoms.dylib',
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'/usr/lib/system/libsystem_trace.dylib', '/usr/lib/system/libunwind.dylib',
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'/usr/lib/system/libxpc.dylib' ]
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exports:
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- targets: [ x86_64-maccatalyst, x86_64-macos ]
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symbols: [ 'R8289209$_close', 'R8289209$_fork', 'R8289209$_fsync', 'R8289209$_getattrlist',
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'R8289209$_getrlimit', 'R8289209$_getxattr', 'R8289209$_open',
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'R8289209$_pthread_attr_destroy', 'R8289209$_pthread_attr_init',
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'R8289209$_pthread_attr_setdetachstate', 'R8289209$_pthread_create',
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'R8289209$_pthread_mutex_lock', 'R8289209$_pthread_mutex_unlock',
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'R8289209$_pthread_self', 'R8289209$_ptrace', 'R8289209$_read',
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'R8289209$_setattrlist', 'R8289209$_setrlimit', 'R8289209$_sigaction',
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'R8289209$_stat', 'R8289209$_sysctl', 'R8289209$_time', 'R8289209$_unlink',
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'R8289209$_write' ]
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- targets: [ x86_64-maccatalyst, x86_64-macos, arm64e-maccatalyst, arm64e-macos,
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arm64-macos, arm64-maccatalyst ]
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symbols: [ ___crashreporter_info__, _libSystem_atfork_child, _libSystem_atfork_parent,
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_libSystem_atfork_prepare, _mach_init_routine ]
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--- !tapi-tbd
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tbd-version: 4
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targets: [ x86_64-macos, x86_64-maccatalyst, arm64-macos, arm64-maccatalyst,
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arm64e-macos, arm64e-maccatalyst ]
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uuids:
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- target: x86_64-macos
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value: ED7D7EB4-B248-33A9-9E6A-58F45EAB7602
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- target: x86_64-maccatalyst
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value: ED7D7EB4-B248-33A9-9E6A-58F45EAB7602
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- target: arm64-macos
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value: 00000000-0000-0000-0000-000000000000
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- target: arm64-maccatalyst
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value: 00000000-0000-0000-0000-000000000000
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- target: arm64e-macos
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value: 758F8B92-8581-3370-9F97-1E3AB045122F
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- target: arm64e-maccatalyst
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value: 758F8B92-8581-3370-9F97-1E3AB045122F
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install-name: '/usr/lib/system/libcache.dylib'
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current-version: 83
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parent-umbrella:
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- targets: [ x86_64-macos, x86_64-maccatalyst, arm64-macos, arm64-maccatalyst,
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arm64e-macos, arm64e-maccatalyst ]
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umbrella: System
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exports:
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- targets: [ arm64e-macos, x86_64-macos, x86_64-maccatalyst, arm64e-maccatalyst,
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arm64-macos, arm64-maccatalyst ]
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symbols: [ _cache_create, _cache_destroy, _cache_get, _cache_get_and_retain,
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_cache_get_cost_hint, _cache_get_count_hint, _cache_get_info,
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_cache_get_info_for_key, _cache_get_info_for_keys, _cache_get_minimum_values_hint,
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_cache_get_name, _cache_hash_byte_string, _cache_invoke, _cache_key_hash_cb_cstring,
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_cache_key_hash_cb_integer, _cache_key_is_equal_cb_cstring,
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_cache_key_is_equal_cb_integer, _cache_print, _cache_print_stats,
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_cache_release_cb_free, _cache_release_value, _cache_remove,
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_cache_remove_all, _cache_remove_with_block, _cache_set_and_retain,
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_cache_set_cost_hint, _cache_set_count_hint, _cache_set_minimum_values_hint,
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_cache_set_name, _cache_simulate_memory_warning_event, _cache_value_make_nonpurgeable_cb,
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_cache_value_make_purgeable_cb ]
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)");
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for (YamlNode &node : nodes) {
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dump_yaml(ctx, node);
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SyncOut(ctx) << "---";
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}
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exit(0);
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}
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ctx.cmdline_args = expand_response_files(ctx, argv);
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std::vector<std::string_view> file_args;
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parse_nonpositional_args(ctx, file_args);
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for (std::string_view arg : file_args)
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read_file(ctx, MappedFile<Context>::must_open(ctx, std::string(arg)));
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for (ObjectFile *obj : ctx.objs)
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obj->parse(ctx);
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for (ObjectFile *obj : ctx.objs)
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obj->resolve_symbols(ctx);
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create_internal_file(ctx);
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create_synthetic_chunks(ctx);
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fill_symtab(ctx);
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export_symbols(ctx);
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i64 output_size = assign_offsets(ctx);
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fix_synthetic_symbol_values(ctx);
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ctx.output_file = open_output_file(ctx, ctx.arg.output, output_size, 0777);
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ctx.buf = ctx.output_file->buf;
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for (OutputSegment *seg : ctx.segments)
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seg->copy_buf(ctx);
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ctx.output_file->close(ctx);
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return 0;
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}
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}
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