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3fa2d384 VP |
1 | /* |
2 | * Copyright (c) 2018 Virtuozzo International GmbH | |
3 | * | |
4 | * Based on source of Wine project | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA | |
19 | */ | |
20 | ||
6ec6e988 VP |
21 | #include <inttypes.h> |
22 | ||
3fa2d384 VP |
23 | #include "qemu/osdep.h" |
24 | #include "pdb.h" | |
25 | #include "err.h" | |
26 | ||
27 | static uint32_t pdb_get_file_size(const struct pdb_reader *r, unsigned idx) | |
28 | { | |
29 | return r->ds.toc->file_size[idx]; | |
30 | } | |
31 | ||
32 | static pdb_seg *get_seg_by_num(struct pdb_reader *r, size_t n) | |
33 | { | |
34 | size_t i = 0; | |
35 | char *ptr; | |
36 | ||
37 | for (ptr = r->segs; (ptr < r->segs + r->segs_size); ) { | |
38 | i++; | |
39 | ptr += 8; | |
40 | if (i == n) { | |
41 | break; | |
42 | } | |
43 | ptr += sizeof(pdb_seg); | |
44 | } | |
45 | ||
46 | return (pdb_seg *)ptr; | |
47 | } | |
48 | ||
49 | uint64_t pdb_find_public_v3_symbol(struct pdb_reader *r, const char *name) | |
50 | { | |
51 | size_t size = pdb_get_file_size(r, r->symbols->gsym_file); | |
52 | int length; | |
53 | const union codeview_symbol *sym; | |
54 | const uint8_t *root = r->modimage; | |
55 | size_t i; | |
56 | ||
57 | for (i = 0; i < size; i += length) { | |
58 | sym = (const void *)(root + i); | |
59 | length = sym->generic.len + 2; | |
60 | ||
61 | if (!sym->generic.id || length < 4) { | |
62 | break; | |
63 | } | |
64 | ||
65 | if (sym->generic.id == S_PUB_V3 && | |
66 | !strcmp(name, sym->public_v3.name)) { | |
67 | pdb_seg *segment = get_seg_by_num(r, sym->public_v3.segment); | |
68 | uint32_t sect_rva = segment->dword[1]; | |
69 | uint64_t rva = sect_rva + sym->public_v3.offset; | |
70 | ||
6ec6e988 | 71 | printf("%s: 0x%016x(%d:\'%.8s\') + 0x%08x = 0x%09"PRIx64"\n", name, |
3fa2d384 VP |
72 | sect_rva, sym->public_v3.segment, |
73 | ((char *)segment - 8), sym->public_v3.offset, rva); | |
74 | return rva; | |
75 | } | |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | uint64_t pdb_resolve(uint64_t img_base, struct pdb_reader *r, const char *name) | |
82 | { | |
83 | uint64_t rva = pdb_find_public_v3_symbol(r, name); | |
84 | ||
85 | if (!rva) { | |
86 | return 0; | |
87 | } | |
88 | ||
89 | return img_base + rva; | |
90 | } | |
91 | ||
92 | static void pdb_reader_ds_exit(struct pdb_reader *r) | |
93 | { | |
94 | free(r->ds.toc); | |
95 | } | |
96 | ||
97 | static void pdb_exit_symbols(struct pdb_reader *r) | |
98 | { | |
99 | free(r->modimage); | |
100 | free(r->symbols); | |
101 | } | |
102 | ||
103 | static void pdb_exit_segments(struct pdb_reader *r) | |
104 | { | |
105 | free(r->segs); | |
106 | } | |
107 | ||
108 | static void *pdb_ds_read(const PDB_DS_HEADER *header, | |
109 | const uint32_t *block_list, int size) | |
110 | { | |
111 | int i, nBlocks; | |
112 | uint8_t *buffer; | |
113 | ||
114 | if (!size) { | |
115 | return NULL; | |
116 | } | |
117 | ||
118 | nBlocks = (size + header->block_size - 1) / header->block_size; | |
119 | ||
120 | buffer = malloc(nBlocks * header->block_size); | |
121 | if (!buffer) { | |
122 | return NULL; | |
123 | } | |
124 | ||
125 | for (i = 0; i < nBlocks; i++) { | |
126 | memcpy(buffer + i * header->block_size, (const char *)header + | |
127 | block_list[i] * header->block_size, header->block_size); | |
128 | } | |
129 | ||
130 | return buffer; | |
131 | } | |
132 | ||
133 | static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number) | |
134 | { | |
135 | const uint32_t *block_list; | |
136 | uint32_t block_size; | |
137 | const uint32_t *file_size; | |
138 | size_t i; | |
139 | ||
140 | if (!r->ds.toc || file_number >= r->ds.toc->num_files) { | |
141 | return NULL; | |
142 | } | |
143 | ||
144 | file_size = r->ds.toc->file_size; | |
145 | r->file_used[file_number / 32] |= 1 << (file_number % 32); | |
146 | ||
147 | if (file_size[file_number] == 0 || file_size[file_number] == 0xFFFFFFFF) { | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | block_list = file_size + r->ds.toc->num_files; | |
152 | block_size = r->ds.header->block_size; | |
153 | ||
154 | for (i = 0; i < file_number; i++) { | |
155 | block_list += (file_size[i] + block_size - 1) / block_size; | |
156 | } | |
157 | ||
158 | return pdb_ds_read(r->ds.header, block_list, file_size[file_number]); | |
159 | } | |
160 | ||
161 | static int pdb_init_segments(struct pdb_reader *r) | |
162 | { | |
163 | char *segs; | |
164 | unsigned stream_idx = r->sidx.segments; | |
165 | ||
166 | segs = pdb_ds_read_file(r, stream_idx); | |
167 | if (!segs) { | |
168 | return 1; | |
169 | } | |
170 | ||
171 | r->segs = segs; | |
172 | r->segs_size = pdb_get_file_size(r, stream_idx); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int pdb_init_symbols(struct pdb_reader *r) | |
178 | { | |
179 | int err = 0; | |
180 | PDB_SYMBOLS *symbols; | |
181 | PDB_STREAM_INDEXES *sidx = &r->sidx; | |
182 | ||
183 | memset(sidx, -1, sizeof(*sidx)); | |
184 | ||
185 | symbols = pdb_ds_read_file(r, 3); | |
186 | if (!symbols) { | |
187 | return 1; | |
188 | } | |
189 | ||
190 | r->symbols = symbols; | |
191 | ||
192 | if (symbols->stream_index_size != sizeof(PDB_STREAM_INDEXES)) { | |
193 | err = 1; | |
194 | goto out_symbols; | |
195 | } | |
196 | ||
197 | memcpy(sidx, (const char *)symbols + sizeof(PDB_SYMBOLS) + | |
198 | symbols->module_size + symbols->offset_size + | |
199 | symbols->hash_size + symbols->srcmodule_size + | |
200 | symbols->pdbimport_size + symbols->unknown2_size, sizeof(*sidx)); | |
201 | ||
202 | /* Read global symbol table */ | |
203 | r->modimage = pdb_ds_read_file(r, symbols->gsym_file); | |
204 | if (!r->modimage) { | |
205 | err = 1; | |
206 | goto out_symbols; | |
207 | } | |
208 | ||
209 | return 0; | |
210 | ||
211 | out_symbols: | |
212 | free(symbols); | |
213 | ||
214 | return err; | |
215 | } | |
216 | ||
217 | static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr) | |
218 | { | |
219 | memset(r->file_used, 0, sizeof(r->file_used)); | |
220 | r->ds.header = hdr; | |
221 | r->ds.toc = pdb_ds_read(hdr, (uint32_t *)((uint8_t *)hdr + | |
222 | hdr->toc_page * hdr->block_size), hdr->toc_size); | |
223 | ||
224 | if (!r->ds.toc) { | |
225 | return 1; | |
226 | } | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static int pdb_reader_init(struct pdb_reader *r, void *data) | |
232 | { | |
233 | int err = 0; | |
234 | const char pdb7[] = "Microsoft C/C++ MSF 7.00"; | |
235 | ||
236 | if (memcmp(data, pdb7, sizeof(pdb7) - 1)) { | |
237 | return 1; | |
238 | } | |
239 | ||
240 | if (pdb_reader_ds_init(r, data)) { | |
241 | return 1; | |
242 | } | |
243 | ||
244 | r->ds.root = pdb_ds_read_file(r, 1); | |
245 | if (!r->ds.root) { | |
246 | err = 1; | |
247 | goto out_ds; | |
248 | } | |
249 | ||
250 | if (pdb_init_symbols(r)) { | |
251 | err = 1; | |
252 | goto out_root; | |
253 | } | |
254 | ||
255 | if (pdb_init_segments(r)) { | |
256 | err = 1; | |
257 | goto out_sym; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | ||
262 | out_sym: | |
263 | pdb_exit_symbols(r); | |
264 | out_root: | |
265 | free(r->ds.root); | |
266 | out_ds: | |
267 | pdb_reader_ds_exit(r); | |
268 | ||
269 | return err; | |
270 | } | |
271 | ||
272 | static void pdb_reader_exit(struct pdb_reader *r) | |
273 | { | |
274 | pdb_exit_segments(r); | |
275 | pdb_exit_symbols(r); | |
276 | free(r->ds.root); | |
277 | pdb_reader_ds_exit(r); | |
278 | } | |
279 | ||
280 | int pdb_init_from_file(const char *name, struct pdb_reader *reader) | |
281 | { | |
4ea1a21d | 282 | GError *gerr = NULL; |
3fa2d384 | 283 | int err = 0; |
3fa2d384 | 284 | void *map; |
3fa2d384 | 285 | |
4ea1a21d VP |
286 | reader->gmf = g_mapped_file_new(name, TRUE, &gerr); |
287 | if (gerr) { | |
288 | eprintf("Failed to map PDB file \'%s\'\n", name); | |
3fa2d384 VP |
289 | return 1; |
290 | } | |
3fa2d384 | 291 | |
4ea1a21d VP |
292 | reader->file_size = g_mapped_file_get_length(reader->gmf); |
293 | map = g_mapped_file_get_contents(reader->gmf); | |
3fa2d384 VP |
294 | if (pdb_reader_init(reader, map)) { |
295 | err = 1; | |
296 | goto out_unmap; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | ||
301 | out_unmap: | |
4ea1a21d | 302 | g_mapped_file_unref(reader->gmf); |
3fa2d384 VP |
303 | |
304 | return err; | |
305 | } | |
306 | ||
307 | void pdb_exit(struct pdb_reader *reader) | |
308 | { | |
4ea1a21d | 309 | g_mapped_file_unref(reader->gmf); |
3fa2d384 VP |
310 | pdb_reader_exit(reader); |
311 | } |