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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 | ||
21 | #include "qemu/osdep.h" | |
bbfff196 | 22 | |
3fa2d384 VP |
23 | #include "pdb.h" |
24 | #include "err.h" | |
25 | ||
26 | static uint32_t pdb_get_file_size(const struct pdb_reader *r, unsigned idx) | |
27 | { | |
28 | return r->ds.toc->file_size[idx]; | |
29 | } | |
30 | ||
31 | static pdb_seg *get_seg_by_num(struct pdb_reader *r, size_t n) | |
32 | { | |
33 | size_t i = 0; | |
34 | char *ptr; | |
35 | ||
36 | for (ptr = r->segs; (ptr < r->segs + r->segs_size); ) { | |
37 | i++; | |
38 | ptr += 8; | |
39 | if (i == n) { | |
40 | break; | |
41 | } | |
42 | ptr += sizeof(pdb_seg); | |
43 | } | |
44 | ||
45 | return (pdb_seg *)ptr; | |
46 | } | |
47 | ||
48 | uint64_t pdb_find_public_v3_symbol(struct pdb_reader *r, const char *name) | |
49 | { | |
50 | size_t size = pdb_get_file_size(r, r->symbols->gsym_file); | |
51 | int length; | |
52 | const union codeview_symbol *sym; | |
53 | const uint8_t *root = r->modimage; | |
54 | size_t i; | |
55 | ||
56 | for (i = 0; i < size; i += length) { | |
57 | sym = (const void *)(root + i); | |
58 | length = sym->generic.len + 2; | |
59 | ||
60 | if (!sym->generic.id || length < 4) { | |
61 | break; | |
62 | } | |
63 | ||
64 | if (sym->generic.id == S_PUB_V3 && | |
65 | !strcmp(name, sym->public_v3.name)) { | |
66 | pdb_seg *segment = get_seg_by_num(r, sym->public_v3.segment); | |
67 | uint32_t sect_rva = segment->dword[1]; | |
68 | uint64_t rva = sect_rva + sym->public_v3.offset; | |
69 | ||
6ec6e988 | 70 | printf("%s: 0x%016x(%d:\'%.8s\') + 0x%08x = 0x%09"PRIx64"\n", name, |
3fa2d384 VP |
71 | sect_rva, sym->public_v3.segment, |
72 | ((char *)segment - 8), sym->public_v3.offset, rva); | |
73 | return rva; | |
74 | } | |
75 | } | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | uint64_t pdb_resolve(uint64_t img_base, struct pdb_reader *r, const char *name) | |
81 | { | |
82 | uint64_t rva = pdb_find_public_v3_symbol(r, name); | |
83 | ||
84 | if (!rva) { | |
85 | return 0; | |
86 | } | |
87 | ||
88 | return img_base + rva; | |
89 | } | |
90 | ||
91 | static void pdb_reader_ds_exit(struct pdb_reader *r) | |
92 | { | |
93 | free(r->ds.toc); | |
94 | } | |
95 | ||
96 | static void pdb_exit_symbols(struct pdb_reader *r) | |
97 | { | |
98 | free(r->modimage); | |
99 | free(r->symbols); | |
100 | } | |
101 | ||
102 | static void pdb_exit_segments(struct pdb_reader *r) | |
103 | { | |
104 | free(r->segs); | |
105 | } | |
106 | ||
107 | static void *pdb_ds_read(const PDB_DS_HEADER *header, | |
108 | const uint32_t *block_list, int size) | |
109 | { | |
110 | int i, nBlocks; | |
111 | uint8_t *buffer; | |
112 | ||
113 | if (!size) { | |
114 | return NULL; | |
115 | } | |
116 | ||
117 | nBlocks = (size + header->block_size - 1) / header->block_size; | |
118 | ||
119 | buffer = malloc(nBlocks * header->block_size); | |
120 | if (!buffer) { | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | for (i = 0; i < nBlocks; i++) { | |
125 | memcpy(buffer + i * header->block_size, (const char *)header + | |
126 | block_list[i] * header->block_size, header->block_size); | |
127 | } | |
128 | ||
129 | return buffer; | |
130 | } | |
131 | ||
132 | static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number) | |
133 | { | |
134 | const uint32_t *block_list; | |
135 | uint32_t block_size; | |
136 | const uint32_t *file_size; | |
137 | size_t i; | |
138 | ||
139 | if (!r->ds.toc || file_number >= r->ds.toc->num_files) { | |
140 | return NULL; | |
141 | } | |
142 | ||
143 | file_size = r->ds.toc->file_size; | |
144 | r->file_used[file_number / 32] |= 1 << (file_number % 32); | |
145 | ||
146 | if (file_size[file_number] == 0 || file_size[file_number] == 0xFFFFFFFF) { | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | block_list = file_size + r->ds.toc->num_files; | |
151 | block_size = r->ds.header->block_size; | |
152 | ||
153 | for (i = 0; i < file_number; i++) { | |
154 | block_list += (file_size[i] + block_size - 1) / block_size; | |
155 | } | |
156 | ||
157 | return pdb_ds_read(r->ds.header, block_list, file_size[file_number]); | |
158 | } | |
159 | ||
160 | static int pdb_init_segments(struct pdb_reader *r) | |
161 | { | |
162 | char *segs; | |
163 | unsigned stream_idx = r->sidx.segments; | |
164 | ||
165 | segs = pdb_ds_read_file(r, stream_idx); | |
166 | if (!segs) { | |
167 | return 1; | |
168 | } | |
169 | ||
170 | r->segs = segs; | |
171 | r->segs_size = pdb_get_file_size(r, stream_idx); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static int pdb_init_symbols(struct pdb_reader *r) | |
177 | { | |
178 | int err = 0; | |
179 | PDB_SYMBOLS *symbols; | |
180 | PDB_STREAM_INDEXES *sidx = &r->sidx; | |
181 | ||
182 | memset(sidx, -1, sizeof(*sidx)); | |
183 | ||
184 | symbols = pdb_ds_read_file(r, 3); | |
185 | if (!symbols) { | |
186 | return 1; | |
187 | } | |
188 | ||
189 | r->symbols = symbols; | |
190 | ||
191 | if (symbols->stream_index_size != sizeof(PDB_STREAM_INDEXES)) { | |
192 | err = 1; | |
193 | goto out_symbols; | |
194 | } | |
195 | ||
196 | memcpy(sidx, (const char *)symbols + sizeof(PDB_SYMBOLS) + | |
197 | symbols->module_size + symbols->offset_size + | |
198 | symbols->hash_size + symbols->srcmodule_size + | |
199 | symbols->pdbimport_size + symbols->unknown2_size, sizeof(*sidx)); | |
200 | ||
201 | /* Read global symbol table */ | |
202 | r->modimage = pdb_ds_read_file(r, symbols->gsym_file); | |
203 | if (!r->modimage) { | |
204 | err = 1; | |
205 | goto out_symbols; | |
206 | } | |
207 | ||
208 | return 0; | |
209 | ||
210 | out_symbols: | |
211 | free(symbols); | |
212 | ||
213 | return err; | |
214 | } | |
215 | ||
216 | static int pdb_reader_ds_init(struct pdb_reader *r, PDB_DS_HEADER *hdr) | |
217 | { | |
218 | memset(r->file_used, 0, sizeof(r->file_used)); | |
219 | r->ds.header = hdr; | |
220 | r->ds.toc = pdb_ds_read(hdr, (uint32_t *)((uint8_t *)hdr + | |
221 | hdr->toc_page * hdr->block_size), hdr->toc_size); | |
222 | ||
223 | if (!r->ds.toc) { | |
224 | return 1; | |
225 | } | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static int pdb_reader_init(struct pdb_reader *r, void *data) | |
231 | { | |
232 | int err = 0; | |
233 | const char pdb7[] = "Microsoft C/C++ MSF 7.00"; | |
234 | ||
235 | if (memcmp(data, pdb7, sizeof(pdb7) - 1)) { | |
236 | return 1; | |
237 | } | |
238 | ||
239 | if (pdb_reader_ds_init(r, data)) { | |
240 | return 1; | |
241 | } | |
242 | ||
243 | r->ds.root = pdb_ds_read_file(r, 1); | |
244 | if (!r->ds.root) { | |
245 | err = 1; | |
246 | goto out_ds; | |
247 | } | |
248 | ||
249 | if (pdb_init_symbols(r)) { | |
250 | err = 1; | |
251 | goto out_root; | |
252 | } | |
253 | ||
254 | if (pdb_init_segments(r)) { | |
255 | err = 1; | |
256 | goto out_sym; | |
257 | } | |
258 | ||
259 | return 0; | |
260 | ||
261 | out_sym: | |
262 | pdb_exit_symbols(r); | |
263 | out_root: | |
264 | free(r->ds.root); | |
265 | out_ds: | |
266 | pdb_reader_ds_exit(r); | |
267 | ||
268 | return err; | |
269 | } | |
270 | ||
271 | static void pdb_reader_exit(struct pdb_reader *r) | |
272 | { | |
273 | pdb_exit_segments(r); | |
274 | pdb_exit_symbols(r); | |
275 | free(r->ds.root); | |
276 | pdb_reader_ds_exit(r); | |
277 | } | |
278 | ||
279 | int pdb_init_from_file(const char *name, struct pdb_reader *reader) | |
280 | { | |
4ea1a21d | 281 | GError *gerr = NULL; |
3fa2d384 | 282 | int err = 0; |
3fa2d384 | 283 | void *map; |
3fa2d384 | 284 | |
4ea1a21d VP |
285 | reader->gmf = g_mapped_file_new(name, TRUE, &gerr); |
286 | if (gerr) { | |
287 | eprintf("Failed to map PDB file \'%s\'\n", name); | |
3fa2d384 VP |
288 | return 1; |
289 | } | |
3fa2d384 | 290 | |
4ea1a21d VP |
291 | reader->file_size = g_mapped_file_get_length(reader->gmf); |
292 | map = g_mapped_file_get_contents(reader->gmf); | |
3fa2d384 VP |
293 | if (pdb_reader_init(reader, map)) { |
294 | err = 1; | |
295 | goto out_unmap; | |
296 | } | |
297 | ||
298 | return 0; | |
299 | ||
300 | out_unmap: | |
4ea1a21d | 301 | g_mapped_file_unref(reader->gmf); |
3fa2d384 VP |
302 | |
303 | return err; | |
304 | } | |
305 | ||
306 | void pdb_exit(struct pdb_reader *reader) | |
307 | { | |
4ea1a21d | 308 | g_mapped_file_unref(reader->gmf); |
3fa2d384 VP |
309 | pdb_reader_exit(reader); |
310 | } |