| /* |
| * Copyright (c) 2018 Virtuozzo International GmbH |
| * |
| * Based on source of Wine project |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "qemu/osdep.h" |
| |
| #include "pdb.h" |
| #include "err.h" |
| |
| static uint32_t pdb_get_file_size(const struct pdb_reader *r, unsigned idx) |
| { |
| if (idx >= r->ds.toc->num_files) { |
| return 0; |
| } |
| |
| return r->ds.toc->file_size[idx]; |
| } |
| |
| static pdb_seg *get_seg_by_num(struct pdb_reader *r, size_t n) |
| { |
| size_t i = 0; |
| char *ptr; |
| |
| for (ptr = r->segs; (ptr < r->segs + r->segs_size); ) { |
| i++; |
| ptr += 8; |
| if (i == n) { |
| break; |
| } |
| ptr += sizeof(pdb_seg); |
| } |
| |
| return (pdb_seg *)ptr; |
| } |
| |
| uint64_t pdb_find_public_v3_symbol(struct pdb_reader *r, const char *name) |
| { |
| size_t size = pdb_get_file_size(r, r->symbols->gsym_file); |
| int length; |
| const union codeview_symbol *sym; |
| const uint8_t *root = r->modimage; |
| size_t i; |
| |
| for (i = 0; i < size; i += length) { |
| sym = (const void *)(root + i); |
| length = sym->generic.len + 2; |
| |
| if (!sym->generic.id || length < 4) { |
| break; |
| } |
| |
| if (sym->generic.id == S_PUB_V3 && |
| !strcmp(name, sym->public_v3.name)) { |
| pdb_seg *segment = get_seg_by_num(r, sym->public_v3.segment); |
| uint32_t sect_rva = segment->dword[1]; |
| uint64_t rva = sect_rva + sym->public_v3.offset; |
| |
| printf("%s: 0x%016x(%d:\'%.8s\') + 0x%08x = 0x%09"PRIx64"\n", name, |
| sect_rva, sym->public_v3.segment, |
| ((char *)segment - 8), sym->public_v3.offset, rva); |
| return rva; |
| } |
| } |
| |
| return 0; |
| } |
| |
| uint64_t pdb_resolve(uint64_t img_base, struct pdb_reader *r, const char *name) |
| { |
| uint64_t rva = pdb_find_public_v3_symbol(r, name); |
| |
| if (!rva) { |
| return 0; |
| } |
| |
| return img_base + rva; |
| } |
| |
| static void pdb_reader_ds_exit(struct pdb_reader *r) |
| { |
| g_free(r->ds.toc); |
| } |
| |
| static void pdb_exit_symbols(struct pdb_reader *r) |
| { |
| g_free(r->modimage); |
| g_free(r->symbols); |
| } |
| |
| static void pdb_exit_segments(struct pdb_reader *r) |
| { |
| g_free(r->segs); |
| } |
| |
| static void *pdb_ds_read(const PDB_DS_HEADER *header, |
| const uint32_t *block_list, int size) |
| { |
| int i, nBlocks; |
| uint8_t *buffer; |
| |
| if (!size) { |
| return NULL; |
| } |
| |
| nBlocks = (size + header->block_size - 1) / header->block_size; |
| |
| buffer = g_malloc(nBlocks * header->block_size); |
| |
| for (i = 0; i < nBlocks; i++) { |
| memcpy(buffer + i * header->block_size, (const char *)header + |
| block_list[i] * header->block_size, header->block_size); |
| } |
| |
| return buffer; |
| } |
| |
| static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number) |
| { |
| const uint32_t *block_list; |
| uint32_t block_size; |
| const uint32_t *file_size; |
| size_t i; |
| |
| if (!r->ds.toc || file_number >= r->ds.toc->num_files) { |
| return NULL; |
| } |
| |
| file_size = r->ds.toc->file_size; |
| r->file_used[file_number / 32] |= 1 << (file_number % 32); |
| |
| if (file_size[file_number] == 0 || file_size[file_number] == 0xFFFFFFFF) { |
| return NULL; |
| } |
| |
| block_list = file_size + r->ds.toc->num_files; |
| block_size = r->ds.header->block_size; |
| |
| for (i = 0; i < file_number; i++) { |
| block_list += (file_size[i] + block_size - 1) / block_size; |
| } |
| |
| return pdb_ds_read(r->ds.header, block_list, file_size[file_number]); |
| } |
| |
| static int pdb_init_segments(struct pdb_reader *r) |
| { |
| unsigned stream_idx = r->segments; |
| |
| r->segs = pdb_ds_read_file(r, stream_idx); |
| if (!r->segs) { |
| return 1; |
| } |
| |
| r->segs_size = pdb_get_file_size(r, stream_idx); |
| if (!r->segs_size) { |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int pdb_init_symbols(struct pdb_reader *r) |
| { |
| PDB_SYMBOLS *symbols; |
| |
| symbols = pdb_ds_read_file(r, 3); |
| if (!symbols) { |
| return 1; |
| } |
| |
| r->symbols = symbols; |
| |
| r->segments = *(uint16_t *)((const char *)symbols + sizeof(PDB_SYMBOLS) + |
| symbols->module_size + symbols->offset_size + |
| symbols->hash_size + symbols->srcmodule_size + |
| symbols->pdbimport_size + symbols->unknown2_size + |
| offsetof(PDB_STREAM_INDEXES, segments)); |
| |
| /* Read global symbol table */ |
| r->modimage = pdb_ds_read_file(r, symbols->gsym_file); |
| if (!r->modimage) { |
| goto out_symbols; |
| } |
| |
| return 0; |
| |
| out_symbols: |
| g_free(symbols); |
| |
| return 1; |
| } |
| |
| static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr) |
| { |
| if (hdr->block_size == 0) { |
| return 1; |
| } |
| |
| memset(r->file_used, 0, sizeof(r->file_used)); |
| r->ds.header = hdr; |
| r->ds.toc = pdb_ds_read(hdr, (uint32_t *)((uint8_t *)hdr + |
| hdr->toc_page * hdr->block_size), hdr->toc_size); |
| |
| if (!r->ds.toc) { |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int pdb_reader_init(struct pdb_reader *r, void *data) |
| { |
| const char pdb7[] = "Microsoft C/C++ MSF 7.00"; |
| |
| if (memcmp(data, pdb7, sizeof(pdb7) - 1)) { |
| return 1; |
| } |
| |
| if (pdb_reader_ds_init(r, data)) { |
| return 1; |
| } |
| |
| r->ds.root = pdb_ds_read_file(r, 1); |
| if (!r->ds.root) { |
| goto out_ds; |
| } |
| |
| if (pdb_init_symbols(r)) { |
| goto out_root; |
| } |
| |
| if (pdb_init_segments(r)) { |
| goto out_sym; |
| } |
| |
| return 0; |
| |
| out_sym: |
| pdb_exit_symbols(r); |
| out_root: |
| g_free(r->ds.root); |
| out_ds: |
| pdb_reader_ds_exit(r); |
| |
| return 1; |
| } |
| |
| static void pdb_reader_exit(struct pdb_reader *r) |
| { |
| pdb_exit_segments(r); |
| pdb_exit_symbols(r); |
| g_free(r->ds.root); |
| pdb_reader_ds_exit(r); |
| } |
| |
| int pdb_init_from_file(const char *name, struct pdb_reader *reader) |
| { |
| GError *gerr = NULL; |
| void *map; |
| |
| reader->gmf = g_mapped_file_new(name, TRUE, &gerr); |
| if (gerr) { |
| eprintf("Failed to map PDB file \'%s\'\n", name); |
| g_error_free(gerr); |
| return 1; |
| } |
| |
| reader->file_size = g_mapped_file_get_length(reader->gmf); |
| map = g_mapped_file_get_contents(reader->gmf); |
| if (pdb_reader_init(reader, map)) { |
| goto out_unmap; |
| } |
| |
| return 0; |
| |
| out_unmap: |
| g_mapped_file_unref(reader->gmf); |
| |
| return 1; |
| } |
| |
| void pdb_exit(struct pdb_reader *reader) |
| { |
| g_mapped_file_unref(reader->gmf); |
| pdb_reader_exit(reader); |
| } |