mirror of
https://github.com/rui314/mold.git
synced 2024-09-21 09:57:18 +03:00
106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
#include "mold.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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void create_synthetic_sections(Context &ctx) {
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auto add = [&](auto &chunk) {
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ctx.chunks.push_back(chunk.get());
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};
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add(ctx.mach_hdr = std::make_unique<OutputMachHeader>());
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add(ctx.load_cmd = std::make_unique<OutputLoadCommand>());
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add(ctx.text_segment =
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std::make_unique<OutputSegment>("__TEXT", VM_PROT_READ | VM_PROT_EXECUTE, 0));
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add(ctx.data_const_segment =
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std::make_unique<OutputSegment>("__DATA_CONST", VM_PROT_READ | VM_PROT_WRITE,
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SG_READ_ONLY));
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add(ctx.data_segment =
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std::make_unique<OutputSegment>("__DATA", VM_PROT_READ | VM_PROT_WRITE, 0));
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add(ctx.linkedit = std::make_unique<OutputLinkEditChunk>());
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ctx.text_segment->sections.push_back(new TextSection(*ctx.text_segment));
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ctx.text_segment->sections.push_back(new StubsSection(*ctx.text_segment));
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ctx.text_segment->sections.push_back(new StubHelperSection(*ctx.text_segment));
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ctx.text_segment->sections.push_back(new CstringSection(*ctx.text_segment));
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ctx.data_const_segment->sections.push_back(new GotSection(*ctx.data_const_segment));
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ctx.data_segment->sections.push_back(new LaSymbolPtrSection(*ctx.data_segment));
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ctx.data_segment->sections.push_back(new DataSection(*ctx.data_segment));
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}
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void compute_chunk_sizes(Context &ctx) {
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for (Chunk *chunk : ctx.chunks)
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chunk->update_hdr(ctx);
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}
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i64 assign_offsets(Context &ctx) {
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i64 fileoff = 0;
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for (Chunk *chunk : ctx.chunks) {
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fileoff = align_to(fileoff, 1 << chunk->p2align);
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chunk->fileoff = fileoff;
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fileoff += chunk->filesize;
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}
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i64 vmaddr = PAGE_ZERO_SIZE;
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for (Chunk *chunk : ctx.chunks) {
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if (chunk->is_segment) {
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OutputSegment &seg = *(OutputSegment *)chunk;
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vmaddr = align_to(vmaddr, PAGE_SIZE);
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seg.cmd.vmaddr = vmaddr;
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vmaddr += seg.cmd.vmsize;
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}
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}
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ctx.linkedit->vmaddr = align_to(vmaddr, PAGE_SIZE);
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return fileoff;
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}
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int main(int argc, char **argv) {
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Context ctx;
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// Parse command line arguments
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if (argc == 1) {
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SyncOut(ctx) << "mold macho stub\n";
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exit(0);
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}
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if (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 (std::string_view(argv[1]) == "-out") {
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if (argc != 3)
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Fatal(ctx) << "usage: ld64.mold -out <output-file>\n";
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ctx.arg.output = argv[2];
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create_synthetic_sections(ctx);
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compute_chunk_sizes(ctx);
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i64 output_size = assign_offsets(ctx);
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ctx.output_file =
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std::make_unique<OutputFile>(ctx, ctx.arg.output, output_size, 0777);
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ctx.buf = ctx.output_file->buf;
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for (Chunk *chunk : ctx.chunks)
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chunk->copy_buf(ctx);
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ctx.output_file->close(ctx);
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exit(0);
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}
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Fatal(ctx) << "usage: ld64.mold\n";
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}
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}
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