mirror of
https://github.com/rui314/mold.git
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99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
#include "mold.h"
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struct ArHdr {
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char ar_name[16];
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char ar_date[12];
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char ar_uid[6];
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char ar_gid[6];
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char ar_mode[8];
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char ar_size[10];
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char ar_fmag[2];
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};
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template <typename E>
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std::vector<MemoryMappedFile<E> *>
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read_thin_archive_members(Context<E> &ctx, MemoryMappedFile<E> *mb) {
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u8 *data = mb->data(ctx) + 8;
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std::vector<MemoryMappedFile<E> *> vec;
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std::string_view strtab;
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while (data < mb->data(ctx) + mb->size()) {
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ArHdr &hdr = *(ArHdr *)data;
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u8 *body = data + sizeof(hdr);
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u64 size = atol(hdr.ar_size);
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if (!memcmp(hdr.ar_name, "// ", 3)) {
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strtab = {(char *)body, size};
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data = body + size;
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continue;
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}
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if (!memcmp(hdr.ar_name, "/ ", 2)) {
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data = body + size;
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continue;
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}
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if (hdr.ar_name[0] != '/')
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Fatal(ctx) << mb->name << ": filename is not stored as a long filename";
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const char *start = strtab.data() + atoi(hdr.ar_name + 1);
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std::string name(start, strstr(start, "/\n"));
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std::string path = path_dirname(mb->name) + "/" + name;
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vec.push_back(MemoryMappedFile<E>::must_open(ctx, path));
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data = body;
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}
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return vec;
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}
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template <typename E>
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std::vector<MemoryMappedFile<E> *>
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read_fat_archive_members(Context<E> &ctx, MemoryMappedFile<E> *mb) {
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u8 *data = mb->data(ctx) + 8;
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std::vector<MemoryMappedFile<E> *> vec;
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std::string_view strtab;
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while (mb->data(ctx) + mb->size() - data >= 2) {
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ArHdr &hdr = *(ArHdr *)data;
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u8 *body = data + sizeof(hdr);
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u64 size = atol(hdr.ar_size);
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data = body + size;
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if (!memcmp(hdr.ar_name, "// ", 3)) {
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strtab = {(char *)body, size};
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continue;
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}
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if (!memcmp(hdr.ar_name, "/ ", 2) ||
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!memcmp(hdr.ar_name, "__.SYMDEF/", 10))
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continue;
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std::string name;
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if (hdr.ar_name[0] == '/') {
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const char *start = strtab.data() + atoi(hdr.ar_name + 1);
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name = {start, strstr(start, "/\n")};
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} else {
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name = {hdr.ar_name, strchr(hdr.ar_name, '/')};
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}
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vec.push_back(mb->slice(ctx, name, body - mb->data(ctx), size));
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}
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return vec;
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}
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template
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std::vector<MemoryMappedFile<X86_64> *>
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read_fat_archive_members(Context<X86_64> &ctx, MemoryMappedFile<X86_64> *mb);
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template
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std::vector<MemoryMappedFile<X86_64> *>
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read_thin_archive_members(Context<X86_64> &ctx, MemoryMappedFile<X86_64> *mb);
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template
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std::vector<MemoryMappedFile<I386> *>
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read_fat_archive_members(Context<I386> &ctx, MemoryMappedFile<I386> *mb);
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template
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std::vector<MemoryMappedFile<I386> *>
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read_thin_archive_members(Context<I386> &ctx, MemoryMappedFile<I386> *mb);
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