1*3fa2d384SViktor Prutyanov /* 2*3fa2d384SViktor Prutyanov * Copyright (c) 2018 Virtuozzo International GmbH 3*3fa2d384SViktor Prutyanov * 4*3fa2d384SViktor Prutyanov * Based on source of Wine project 5*3fa2d384SViktor Prutyanov * 6*3fa2d384SViktor Prutyanov * This library is free software; you can redistribute it and/or 7*3fa2d384SViktor Prutyanov * modify it under the terms of the GNU Lesser General Public 8*3fa2d384SViktor Prutyanov * License as published by the Free Software Foundation; either 9*3fa2d384SViktor Prutyanov * version 2.1 of the License, or (at your option) any later version. 10*3fa2d384SViktor Prutyanov * 11*3fa2d384SViktor Prutyanov * This library is distributed in the hope that it will be useful, 12*3fa2d384SViktor Prutyanov * but WITHOUT ANY WARRANTY; without even the implied warranty of 13*3fa2d384SViktor Prutyanov * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*3fa2d384SViktor Prutyanov * Lesser General Public License for more details. 15*3fa2d384SViktor Prutyanov * 16*3fa2d384SViktor Prutyanov * You should have received a copy of the GNU Lesser General Public 17*3fa2d384SViktor Prutyanov * License along with this library; if not, write to the Free Software 18*3fa2d384SViktor Prutyanov * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 19*3fa2d384SViktor Prutyanov */ 20*3fa2d384SViktor Prutyanov 21*3fa2d384SViktor Prutyanov #include "qemu/osdep.h" 22*3fa2d384SViktor Prutyanov #include "pdb.h" 23*3fa2d384SViktor Prutyanov #include "err.h" 24*3fa2d384SViktor Prutyanov 25*3fa2d384SViktor Prutyanov static uint32_t pdb_get_file_size(const struct pdb_reader *r, unsigned idx) 26*3fa2d384SViktor Prutyanov { 27*3fa2d384SViktor Prutyanov return r->ds.toc->file_size[idx]; 28*3fa2d384SViktor Prutyanov } 29*3fa2d384SViktor Prutyanov 30*3fa2d384SViktor Prutyanov static pdb_seg *get_seg_by_num(struct pdb_reader *r, size_t n) 31*3fa2d384SViktor Prutyanov { 32*3fa2d384SViktor Prutyanov size_t i = 0; 33*3fa2d384SViktor Prutyanov char *ptr; 34*3fa2d384SViktor Prutyanov 35*3fa2d384SViktor Prutyanov for (ptr = r->segs; (ptr < r->segs + r->segs_size); ) { 36*3fa2d384SViktor Prutyanov i++; 37*3fa2d384SViktor Prutyanov ptr += 8; 38*3fa2d384SViktor Prutyanov if (i == n) { 39*3fa2d384SViktor Prutyanov break; 40*3fa2d384SViktor Prutyanov } 41*3fa2d384SViktor Prutyanov ptr += sizeof(pdb_seg); 42*3fa2d384SViktor Prutyanov } 43*3fa2d384SViktor Prutyanov 44*3fa2d384SViktor Prutyanov return (pdb_seg *)ptr; 45*3fa2d384SViktor Prutyanov } 46*3fa2d384SViktor Prutyanov 47*3fa2d384SViktor Prutyanov uint64_t pdb_find_public_v3_symbol(struct pdb_reader *r, const char *name) 48*3fa2d384SViktor Prutyanov { 49*3fa2d384SViktor Prutyanov size_t size = pdb_get_file_size(r, r->symbols->gsym_file); 50*3fa2d384SViktor Prutyanov int length; 51*3fa2d384SViktor Prutyanov const union codeview_symbol *sym; 52*3fa2d384SViktor Prutyanov const uint8_t *root = r->modimage; 53*3fa2d384SViktor Prutyanov size_t i; 54*3fa2d384SViktor Prutyanov 55*3fa2d384SViktor Prutyanov for (i = 0; i < size; i += length) { 56*3fa2d384SViktor Prutyanov sym = (const void *)(root + i); 57*3fa2d384SViktor Prutyanov length = sym->generic.len + 2; 58*3fa2d384SViktor Prutyanov 59*3fa2d384SViktor Prutyanov if (!sym->generic.id || length < 4) { 60*3fa2d384SViktor Prutyanov break; 61*3fa2d384SViktor Prutyanov } 62*3fa2d384SViktor Prutyanov 63*3fa2d384SViktor Prutyanov if (sym->generic.id == S_PUB_V3 && 64*3fa2d384SViktor Prutyanov !strcmp(name, sym->public_v3.name)) { 65*3fa2d384SViktor Prutyanov pdb_seg *segment = get_seg_by_num(r, sym->public_v3.segment); 66*3fa2d384SViktor Prutyanov uint32_t sect_rva = segment->dword[1]; 67*3fa2d384SViktor Prutyanov uint64_t rva = sect_rva + sym->public_v3.offset; 68*3fa2d384SViktor Prutyanov 69*3fa2d384SViktor Prutyanov printf("%s: 0x%016x(%d:\'%.8s\') + 0x%08x = 0x%09lx\n", name, 70*3fa2d384SViktor Prutyanov sect_rva, sym->public_v3.segment, 71*3fa2d384SViktor Prutyanov ((char *)segment - 8), sym->public_v3.offset, rva); 72*3fa2d384SViktor Prutyanov return rva; 73*3fa2d384SViktor Prutyanov } 74*3fa2d384SViktor Prutyanov } 75*3fa2d384SViktor Prutyanov 76*3fa2d384SViktor Prutyanov return 0; 77*3fa2d384SViktor Prutyanov } 78*3fa2d384SViktor Prutyanov 79*3fa2d384SViktor Prutyanov uint64_t pdb_resolve(uint64_t img_base, struct pdb_reader *r, const char *name) 80*3fa2d384SViktor Prutyanov { 81*3fa2d384SViktor Prutyanov uint64_t rva = pdb_find_public_v3_symbol(r, name); 82*3fa2d384SViktor Prutyanov 83*3fa2d384SViktor Prutyanov if (!rva) { 84*3fa2d384SViktor Prutyanov return 0; 85*3fa2d384SViktor Prutyanov } 86*3fa2d384SViktor Prutyanov 87*3fa2d384SViktor Prutyanov return img_base + rva; 88*3fa2d384SViktor Prutyanov } 89*3fa2d384SViktor Prutyanov 90*3fa2d384SViktor Prutyanov static void pdb_reader_ds_exit(struct pdb_reader *r) 91*3fa2d384SViktor Prutyanov { 92*3fa2d384SViktor Prutyanov free(r->ds.toc); 93*3fa2d384SViktor Prutyanov } 94*3fa2d384SViktor Prutyanov 95*3fa2d384SViktor Prutyanov static void pdb_exit_symbols(struct pdb_reader *r) 96*3fa2d384SViktor Prutyanov { 97*3fa2d384SViktor Prutyanov free(r->modimage); 98*3fa2d384SViktor Prutyanov free(r->symbols); 99*3fa2d384SViktor Prutyanov } 100*3fa2d384SViktor Prutyanov 101*3fa2d384SViktor Prutyanov static void pdb_exit_segments(struct pdb_reader *r) 102*3fa2d384SViktor Prutyanov { 103*3fa2d384SViktor Prutyanov free(r->segs); 104*3fa2d384SViktor Prutyanov } 105*3fa2d384SViktor Prutyanov 106*3fa2d384SViktor Prutyanov static void *pdb_ds_read(const PDB_DS_HEADER *header, 107*3fa2d384SViktor Prutyanov const uint32_t *block_list, int size) 108*3fa2d384SViktor Prutyanov { 109*3fa2d384SViktor Prutyanov int i, nBlocks; 110*3fa2d384SViktor Prutyanov uint8_t *buffer; 111*3fa2d384SViktor Prutyanov 112*3fa2d384SViktor Prutyanov if (!size) { 113*3fa2d384SViktor Prutyanov return NULL; 114*3fa2d384SViktor Prutyanov } 115*3fa2d384SViktor Prutyanov 116*3fa2d384SViktor Prutyanov nBlocks = (size + header->block_size - 1) / header->block_size; 117*3fa2d384SViktor Prutyanov 118*3fa2d384SViktor Prutyanov buffer = malloc(nBlocks * header->block_size); 119*3fa2d384SViktor Prutyanov if (!buffer) { 120*3fa2d384SViktor Prutyanov return NULL; 121*3fa2d384SViktor Prutyanov } 122*3fa2d384SViktor Prutyanov 123*3fa2d384SViktor Prutyanov for (i = 0; i < nBlocks; i++) { 124*3fa2d384SViktor Prutyanov memcpy(buffer + i * header->block_size, (const char *)header + 125*3fa2d384SViktor Prutyanov block_list[i] * header->block_size, header->block_size); 126*3fa2d384SViktor Prutyanov } 127*3fa2d384SViktor Prutyanov 128*3fa2d384SViktor Prutyanov return buffer; 129*3fa2d384SViktor Prutyanov } 130*3fa2d384SViktor Prutyanov 131*3fa2d384SViktor Prutyanov static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number) 132*3fa2d384SViktor Prutyanov { 133*3fa2d384SViktor Prutyanov const uint32_t *block_list; 134*3fa2d384SViktor Prutyanov uint32_t block_size; 135*3fa2d384SViktor Prutyanov const uint32_t *file_size; 136*3fa2d384SViktor Prutyanov size_t i; 137*3fa2d384SViktor Prutyanov 138*3fa2d384SViktor Prutyanov if (!r->ds.toc || file_number >= r->ds.toc->num_files) { 139*3fa2d384SViktor Prutyanov return NULL; 140*3fa2d384SViktor Prutyanov } 141*3fa2d384SViktor Prutyanov 142*3fa2d384SViktor Prutyanov file_size = r->ds.toc->file_size; 143*3fa2d384SViktor Prutyanov r->file_used[file_number / 32] |= 1 << (file_number % 32); 144*3fa2d384SViktor Prutyanov 145*3fa2d384SViktor Prutyanov if (file_size[file_number] == 0 || file_size[file_number] == 0xFFFFFFFF) { 146*3fa2d384SViktor Prutyanov return NULL; 147*3fa2d384SViktor Prutyanov } 148*3fa2d384SViktor Prutyanov 149*3fa2d384SViktor Prutyanov block_list = file_size + r->ds.toc->num_files; 150*3fa2d384SViktor Prutyanov block_size = r->ds.header->block_size; 151*3fa2d384SViktor Prutyanov 152*3fa2d384SViktor Prutyanov for (i = 0; i < file_number; i++) { 153*3fa2d384SViktor Prutyanov block_list += (file_size[i] + block_size - 1) / block_size; 154*3fa2d384SViktor Prutyanov } 155*3fa2d384SViktor Prutyanov 156*3fa2d384SViktor Prutyanov return pdb_ds_read(r->ds.header, block_list, file_size[file_number]); 157*3fa2d384SViktor Prutyanov } 158*3fa2d384SViktor Prutyanov 159*3fa2d384SViktor Prutyanov static int pdb_init_segments(struct pdb_reader *r) 160*3fa2d384SViktor Prutyanov { 161*3fa2d384SViktor Prutyanov char *segs; 162*3fa2d384SViktor Prutyanov unsigned stream_idx = r->sidx.segments; 163*3fa2d384SViktor Prutyanov 164*3fa2d384SViktor Prutyanov segs = pdb_ds_read_file(r, stream_idx); 165*3fa2d384SViktor Prutyanov if (!segs) { 166*3fa2d384SViktor Prutyanov return 1; 167*3fa2d384SViktor Prutyanov } 168*3fa2d384SViktor Prutyanov 169*3fa2d384SViktor Prutyanov r->segs = segs; 170*3fa2d384SViktor Prutyanov r->segs_size = pdb_get_file_size(r, stream_idx); 171*3fa2d384SViktor Prutyanov 172*3fa2d384SViktor Prutyanov return 0; 173*3fa2d384SViktor Prutyanov } 174*3fa2d384SViktor Prutyanov 175*3fa2d384SViktor Prutyanov static int pdb_init_symbols(struct pdb_reader *r) 176*3fa2d384SViktor Prutyanov { 177*3fa2d384SViktor Prutyanov int err = 0; 178*3fa2d384SViktor Prutyanov PDB_SYMBOLS *symbols; 179*3fa2d384SViktor Prutyanov PDB_STREAM_INDEXES *sidx = &r->sidx; 180*3fa2d384SViktor Prutyanov 181*3fa2d384SViktor Prutyanov memset(sidx, -1, sizeof(*sidx)); 182*3fa2d384SViktor Prutyanov 183*3fa2d384SViktor Prutyanov symbols = pdb_ds_read_file(r, 3); 184*3fa2d384SViktor Prutyanov if (!symbols) { 185*3fa2d384SViktor Prutyanov return 1; 186*3fa2d384SViktor Prutyanov } 187*3fa2d384SViktor Prutyanov 188*3fa2d384SViktor Prutyanov r->symbols = symbols; 189*3fa2d384SViktor Prutyanov 190*3fa2d384SViktor Prutyanov if (symbols->stream_index_size != sizeof(PDB_STREAM_INDEXES)) { 191*3fa2d384SViktor Prutyanov err = 1; 192*3fa2d384SViktor Prutyanov goto out_symbols; 193*3fa2d384SViktor Prutyanov } 194*3fa2d384SViktor Prutyanov 195*3fa2d384SViktor Prutyanov memcpy(sidx, (const char *)symbols + sizeof(PDB_SYMBOLS) + 196*3fa2d384SViktor Prutyanov symbols->module_size + symbols->offset_size + 197*3fa2d384SViktor Prutyanov symbols->hash_size + symbols->srcmodule_size + 198*3fa2d384SViktor Prutyanov symbols->pdbimport_size + symbols->unknown2_size, sizeof(*sidx)); 199*3fa2d384SViktor Prutyanov 200*3fa2d384SViktor Prutyanov /* Read global symbol table */ 201*3fa2d384SViktor Prutyanov r->modimage = pdb_ds_read_file(r, symbols->gsym_file); 202*3fa2d384SViktor Prutyanov if (!r->modimage) { 203*3fa2d384SViktor Prutyanov err = 1; 204*3fa2d384SViktor Prutyanov goto out_symbols; 205*3fa2d384SViktor Prutyanov } 206*3fa2d384SViktor Prutyanov 207*3fa2d384SViktor Prutyanov return 0; 208*3fa2d384SViktor Prutyanov 209*3fa2d384SViktor Prutyanov out_symbols: 210*3fa2d384SViktor Prutyanov free(symbols); 211*3fa2d384SViktor Prutyanov 212*3fa2d384SViktor Prutyanov return err; 213*3fa2d384SViktor Prutyanov } 214*3fa2d384SViktor Prutyanov 215*3fa2d384SViktor Prutyanov static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr) 216*3fa2d384SViktor Prutyanov { 217*3fa2d384SViktor Prutyanov memset(r->file_used, 0, sizeof(r->file_used)); 218*3fa2d384SViktor Prutyanov r->ds.header = hdr; 219*3fa2d384SViktor Prutyanov r->ds.toc = pdb_ds_read(hdr, (uint32_t *)((uint8_t *)hdr + 220*3fa2d384SViktor Prutyanov hdr->toc_page * hdr->block_size), hdr->toc_size); 221*3fa2d384SViktor Prutyanov 222*3fa2d384SViktor Prutyanov if (!r->ds.toc) { 223*3fa2d384SViktor Prutyanov return 1; 224*3fa2d384SViktor Prutyanov } 225*3fa2d384SViktor Prutyanov 226*3fa2d384SViktor Prutyanov return 0; 227*3fa2d384SViktor Prutyanov } 228*3fa2d384SViktor Prutyanov 229*3fa2d384SViktor Prutyanov static int pdb_reader_init(struct pdb_reader *r, void *data) 230*3fa2d384SViktor Prutyanov { 231*3fa2d384SViktor Prutyanov int err = 0; 232*3fa2d384SViktor Prutyanov const char pdb7[] = "Microsoft C/C++ MSF 7.00"; 233*3fa2d384SViktor Prutyanov 234*3fa2d384SViktor Prutyanov if (memcmp(data, pdb7, sizeof(pdb7) - 1)) { 235*3fa2d384SViktor Prutyanov return 1; 236*3fa2d384SViktor Prutyanov } 237*3fa2d384SViktor Prutyanov 238*3fa2d384SViktor Prutyanov if (pdb_reader_ds_init(r, data)) { 239*3fa2d384SViktor Prutyanov return 1; 240*3fa2d384SViktor Prutyanov } 241*3fa2d384SViktor Prutyanov 242*3fa2d384SViktor Prutyanov r->ds.root = pdb_ds_read_file(r, 1); 243*3fa2d384SViktor Prutyanov if (!r->ds.root) { 244*3fa2d384SViktor Prutyanov err = 1; 245*3fa2d384SViktor Prutyanov goto out_ds; 246*3fa2d384SViktor Prutyanov } 247*3fa2d384SViktor Prutyanov 248*3fa2d384SViktor Prutyanov if (pdb_init_symbols(r)) { 249*3fa2d384SViktor Prutyanov err = 1; 250*3fa2d384SViktor Prutyanov goto out_root; 251*3fa2d384SViktor Prutyanov } 252*3fa2d384SViktor Prutyanov 253*3fa2d384SViktor Prutyanov if (pdb_init_segments(r)) { 254*3fa2d384SViktor Prutyanov err = 1; 255*3fa2d384SViktor Prutyanov goto out_sym; 256*3fa2d384SViktor Prutyanov } 257*3fa2d384SViktor Prutyanov 258*3fa2d384SViktor Prutyanov return 0; 259*3fa2d384SViktor Prutyanov 260*3fa2d384SViktor Prutyanov out_sym: 261*3fa2d384SViktor Prutyanov pdb_exit_symbols(r); 262*3fa2d384SViktor Prutyanov out_root: 263*3fa2d384SViktor Prutyanov free(r->ds.root); 264*3fa2d384SViktor Prutyanov out_ds: 265*3fa2d384SViktor Prutyanov pdb_reader_ds_exit(r); 266*3fa2d384SViktor Prutyanov 267*3fa2d384SViktor Prutyanov return err; 268*3fa2d384SViktor Prutyanov } 269*3fa2d384SViktor Prutyanov 270*3fa2d384SViktor Prutyanov static void pdb_reader_exit(struct pdb_reader *r) 271*3fa2d384SViktor Prutyanov { 272*3fa2d384SViktor Prutyanov pdb_exit_segments(r); 273*3fa2d384SViktor Prutyanov pdb_exit_symbols(r); 274*3fa2d384SViktor Prutyanov free(r->ds.root); 275*3fa2d384SViktor Prutyanov pdb_reader_ds_exit(r); 276*3fa2d384SViktor Prutyanov } 277*3fa2d384SViktor Prutyanov 278*3fa2d384SViktor Prutyanov int pdb_init_from_file(const char *name, struct pdb_reader *reader) 279*3fa2d384SViktor Prutyanov { 280*3fa2d384SViktor Prutyanov int err = 0; 281*3fa2d384SViktor Prutyanov int fd; 282*3fa2d384SViktor Prutyanov void *map; 283*3fa2d384SViktor Prutyanov struct stat st; 284*3fa2d384SViktor Prutyanov 285*3fa2d384SViktor Prutyanov fd = open(name, O_RDONLY, 0); 286*3fa2d384SViktor Prutyanov if (fd == -1) { 287*3fa2d384SViktor Prutyanov eprintf("Failed to open PDB file \'%s\'\n", name); 288*3fa2d384SViktor Prutyanov return 1; 289*3fa2d384SViktor Prutyanov } 290*3fa2d384SViktor Prutyanov reader->fd = fd; 291*3fa2d384SViktor Prutyanov 292*3fa2d384SViktor Prutyanov fstat(fd, &st); 293*3fa2d384SViktor Prutyanov reader->file_size = st.st_size; 294*3fa2d384SViktor Prutyanov 295*3fa2d384SViktor Prutyanov map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); 296*3fa2d384SViktor Prutyanov if (map == MAP_FAILED) { 297*3fa2d384SViktor Prutyanov eprintf("Failed to map PDB file\n"); 298*3fa2d384SViktor Prutyanov err = 1; 299*3fa2d384SViktor Prutyanov goto out_fd; 300*3fa2d384SViktor Prutyanov } 301*3fa2d384SViktor Prutyanov 302*3fa2d384SViktor Prutyanov if (pdb_reader_init(reader, map)) { 303*3fa2d384SViktor Prutyanov err = 1; 304*3fa2d384SViktor Prutyanov goto out_unmap; 305*3fa2d384SViktor Prutyanov } 306*3fa2d384SViktor Prutyanov 307*3fa2d384SViktor Prutyanov return 0; 308*3fa2d384SViktor Prutyanov 309*3fa2d384SViktor Prutyanov out_unmap: 310*3fa2d384SViktor Prutyanov munmap(map, st.st_size); 311*3fa2d384SViktor Prutyanov out_fd: 312*3fa2d384SViktor Prutyanov close(fd); 313*3fa2d384SViktor Prutyanov 314*3fa2d384SViktor Prutyanov return err; 315*3fa2d384SViktor Prutyanov } 316*3fa2d384SViktor Prutyanov 317*3fa2d384SViktor Prutyanov void pdb_exit(struct pdb_reader *reader) 318*3fa2d384SViktor Prutyanov { 319*3fa2d384SViktor Prutyanov munmap(reader->ds.header, reader->file_size); 320*3fa2d384SViktor Prutyanov close(reader->fd); 321*3fa2d384SViktor Prutyanov pdb_reader_exit(reader); 322*3fa2d384SViktor Prutyanov } 323