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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Sergey Bondari |
2 | * Copyright (c) 2006 Sergey Bondari |
3 | * Copyright (c) 2006 Jakub Jermar |
3 | * Copyright (c) 2006 Jakub Jermar |
4 | * Copyright (c) 2008 Jiri Svoboda |
4 | * Copyright (c) 2008 Jiri Svoboda |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
9 | * are met: |
10 | * |
10 | * |
11 | * - Redistributions of source code must retain the above copyright |
11 | * - Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * - Redistributions in binary form must reproduce the above copyright |
13 | * - Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
15 | * documentation and/or other materials provided with the distribution. |
16 | * - The name of the author may not be used to endorse or promote products |
16 | * - The name of the author may not be used to endorse or promote products |
17 | * derived from this software without specific prior written permission. |
17 | * derived from this software without specific prior written permission. |
18 | * |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | */ |
29 | */ |
30 | 30 | ||
31 | /** @addtogroup generic |
31 | /** @addtogroup generic |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | 34 | ||
35 | /** |
35 | /** |
36 | * @file |
36 | * @file |
37 | * @brief Kernel ELF loader. |
37 | * @brief Kernel ELF loader. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <stdio.h> |
40 | #include <stdio.h> |
41 | #include <sys/types.h> |
41 | #include <sys/types.h> |
42 | #include <align.h> |
42 | #include <align.h> |
43 | #include <assert.h> |
43 | #include <assert.h> |
44 | #include <as.h> |
44 | #include <as.h> |
45 | #include <unistd.h> |
45 | #include <unistd.h> |
46 | #include <fcntl.h> |
46 | #include <fcntl.h> |
47 | 47 | ||
48 | #include "elf.h" |
48 | #include "elf.h" |
49 | #include "pcb.h" |
49 | #include "pcb.h" |
50 | #include "elf_load.h" |
50 | #include "elf_load.h" |
51 | 51 | ||
52 | #define RTLD_BIAS 0x80000 |
52 | #define RTLD_BIAS 0x80000 |
53 | //#define RTLD_BIAS 0 |
53 | //#define RTLD_BIAS 0 |
54 | 54 | ||
55 | static char *error_codes[] = { |
55 | static char *error_codes[] = { |
56 | "no error", |
56 | "no error", |
57 | "invalid image", |
57 | "invalid image", |
58 | "address space error", |
58 | "address space error", |
59 | "incompatible image", |
59 | "incompatible image", |
60 | "unsupported image type", |
60 | "unsupported image type", |
61 | "irrecoverable error" |
61 | "irrecoverable error" |
62 | }; |
62 | }; |
63 | 63 | ||
64 | static unsigned int elf_load(elf_ld_t *elf); |
64 | static unsigned int elf_load(elf_ld_t *elf); |
65 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
65 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
66 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
66 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
67 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
67 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
68 | 68 | ||
69 | int elf_load_file(char *file_name, elf_info_t *info) |
69 | int elf_load_file(char *file_name, elf_info_t *info) |
70 | { |
70 | { |
71 | elf_ld_t elf; |
71 | elf_ld_t elf; |
72 | 72 | ||
73 | int fd; |
73 | int fd; |
74 | int rc; |
74 | int rc; |
75 | 75 | ||
76 | printf("open and read '%s'...\n", file_name); |
76 | printf("open and read '%s'...\n", file_name); |
77 | 77 | ||
78 | fd = open(file_name, 0); |
78 | fd = open(file_name, 0); |
79 | if (fd < 0) { |
79 | if (fd < 0) { |
80 | printf("failed opening file\n"); |
80 | printf("failed opening file\n"); |
81 | return -1; |
81 | return -1; |
82 | } |
82 | } |
83 | 83 | ||
84 | elf.fd = fd; |
84 | elf.fd = fd; |
85 | elf.info = info; |
85 | elf.info = info; |
86 | 86 | ||
87 | rc = elf_load(&elf); |
87 | rc = elf_load(&elf); |
88 | printf("elf_load() -> %d\n", rc); |
88 | printf("elf_load() -> %d\n", rc); |
89 | 89 | ||
90 | close(fd); |
90 | close(fd); |
91 | 91 | ||
92 | return rc; |
92 | return rc; |
93 | } |
93 | } |
94 | 94 | ||
95 | void elf_run(elf_info_t *info) |
95 | void elf_run(elf_info_t *info) |
96 | { |
96 | { |
97 | (*info->entry)(); |
97 | (*info->entry)(); |
98 | 98 | ||
99 | /* not reached */ |
99 | /* not reached */ |
100 | } |
100 | } |
101 | 101 | ||
102 | int elf_create_pcb(elf_info_t *info) |
102 | int elf_create_pcb(elf_info_t *info) |
103 | { |
103 | { |
104 | pcb_t *pcb; |
104 | pcb_t *pcb; |
105 | void *a; |
105 | void *a; |
106 | 106 | ||
107 | pcb = (pcb_t *)PCB_ADDRESS; |
107 | pcb = (pcb_t *)PCB_ADDRESS; |
108 | 108 | ||
109 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
109 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
110 | if (a == (void *)(-1)) { |
110 | if (a == (void *)(-1)) { |
111 | printf("elf_create_pcb: memory mapping failed\n"); |
111 | printf("elf_create_pcb: memory mapping failed\n"); |
112 | return EE_MEMORY; |
112 | return EE_MEMORY; |
113 | } |
113 | } |
114 | 114 | ||
115 | pcb->entry = info->entry; |
115 | pcb->entry = info->entry; |
- | 116 | pcb->dynamic = info->dynamic; |
|
116 | 117 | ||
117 | return 0; |
118 | return 0; |
118 | } |
119 | } |
119 | 120 | ||
120 | 121 | ||
121 | /** ELF loader |
122 | /** ELF loader |
122 | * |
123 | * |
123 | * @param header Pointer to ELF header in memory |
124 | * @param header Pointer to ELF header in memory |
124 | * @return EE_OK on success |
125 | * @return EE_OK on success |
125 | */ |
126 | */ |
126 | static unsigned int elf_load(elf_ld_t *elf) |
127 | static unsigned int elf_load(elf_ld_t *elf) |
127 | { |
128 | { |
128 | elf_header_t header_buf; |
129 | elf_header_t header_buf; |
129 | elf_header_t *header = &header_buf; |
130 | elf_header_t *header = &header_buf; |
130 | int i, rc; |
131 | int i, rc; |
131 | 132 | ||
132 | rc = read(elf->fd, header, sizeof(elf_header_t)); |
133 | rc = read(elf->fd, header, sizeof(elf_header_t)); |
133 | if (rc < 0) { |
134 | if (rc < 0) { |
134 | printf("read error\n"); |
135 | printf("read error\n"); |
135 | return EE_INVALID; |
136 | return EE_INVALID; |
136 | } |
137 | } |
137 | 138 | ||
138 | elf->header = header; |
139 | elf->header = header; |
139 | 140 | ||
140 | printf("ELF-load:"); |
141 | printf("ELF-load:"); |
141 | /* Identify ELF */ |
142 | /* Identify ELF */ |
142 | if (header->e_ident[EI_MAG0] != ELFMAG0 || |
143 | if (header->e_ident[EI_MAG0] != ELFMAG0 || |
143 | header->e_ident[EI_MAG1] != ELFMAG1 || |
144 | header->e_ident[EI_MAG1] != ELFMAG1 || |
144 | header->e_ident[EI_MAG2] != ELFMAG2 || |
145 | header->e_ident[EI_MAG2] != ELFMAG2 || |
145 | header->e_ident[EI_MAG3] != ELFMAG3) { |
146 | header->e_ident[EI_MAG3] != ELFMAG3) { |
146 | printf("invalid header\n"); |
147 | printf("invalid header\n"); |
147 | return EE_INVALID; |
148 | return EE_INVALID; |
148 | } |
149 | } |
149 | 150 | ||
150 | /* Identify ELF compatibility */ |
151 | /* Identify ELF compatibility */ |
151 | if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || |
152 | if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || |
152 | header->e_machine != ELF_MACHINE || |
153 | header->e_machine != ELF_MACHINE || |
153 | header->e_ident[EI_VERSION] != EV_CURRENT || |
154 | header->e_ident[EI_VERSION] != EV_CURRENT || |
154 | header->e_version != EV_CURRENT || |
155 | header->e_version != EV_CURRENT || |
155 | header->e_ident[EI_CLASS] != ELF_CLASS) { |
156 | header->e_ident[EI_CLASS] != ELF_CLASS) { |
156 | printf("incompatible data/version/class\n"); |
157 | printf("incompatible data/version/class\n"); |
157 | return EE_INCOMPATIBLE; |
158 | return EE_INCOMPATIBLE; |
158 | } |
159 | } |
159 | 160 | ||
160 | if (header->e_phentsize != sizeof(elf_segment_header_t)) |
161 | if (header->e_phentsize != sizeof(elf_segment_header_t)) |
161 | return EE_INCOMPATIBLE; |
162 | return EE_INCOMPATIBLE; |
162 | 163 | ||
163 | if (header->e_shentsize != sizeof(elf_section_header_t)) |
164 | if (header->e_shentsize != sizeof(elf_section_header_t)) |
164 | return EE_INCOMPATIBLE; |
165 | return EE_INCOMPATIBLE; |
165 | 166 | ||
166 | /* Check if the object type is supported. */ |
167 | /* Check if the object type is supported. */ |
167 | if (header->e_type != ET_EXEC && header->e_type != ET_DYN) { |
168 | if (header->e_type != ET_EXEC && header->e_type != ET_DYN) { |
168 | printf("Object type %d is not supported\n", header->e_type); |
169 | printf("Object type %d is not supported\n", header->e_type); |
169 | return EE_UNSUPPORTED; |
170 | return EE_UNSUPPORTED; |
170 | } |
171 | } |
171 | 172 | ||
172 | /* The run-time dynamic linker is loaded with a bias */ |
173 | /* The run-time dynamic linker is loaded with a bias */ |
173 | if (header->e_type == ET_DYN) |
174 | if (header->e_type == ET_DYN) |
174 | elf->bias = RTLD_BIAS; |
175 | elf->bias = RTLD_BIAS; |
175 | else |
176 | else |
176 | elf->bias = 0; |
177 | elf->bias = 0; |
177 | 178 | ||
178 | printf("parse segments\n"); |
179 | printf("parse segments\n"); |
179 | 180 | ||
180 | /* Walk through all segment headers and process them. */ |
181 | /* Walk through all segment headers and process them. */ |
181 | for (i = 0; i < header->e_phnum; i++) { |
182 | for (i = 0; i < header->e_phnum; i++) { |
182 | elf_segment_header_t segment_hdr; |
183 | elf_segment_header_t segment_hdr; |
183 | 184 | ||
184 | /* Seek to start of segment header */ |
185 | /* Seek to start of segment header */ |
185 | lseek(elf->fd, header->e_phoff |
186 | lseek(elf->fd, header->e_phoff |
186 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
187 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
187 | 188 | ||
188 | rc = read(elf->fd, &segment_hdr, sizeof(elf_segment_header_t)); |
189 | rc = read(elf->fd, &segment_hdr, sizeof(elf_segment_header_t)); |
189 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
190 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
190 | 191 | ||
191 | rc = segment_header(elf, &segment_hdr); |
192 | rc = segment_header(elf, &segment_hdr); |
192 | if (rc != EE_OK) |
193 | if (rc != EE_OK) |
193 | return rc; |
194 | return rc; |
194 | } |
195 | } |
195 | 196 | ||
196 | printf("parse sections\n"); |
197 | printf("parse sections\n"); |
197 | 198 | ||
198 | /* Inspect all section headers and proccess them. */ |
199 | /* Inspect all section headers and proccess them. */ |
199 | for (i = 0; i < header->e_shnum; i++) { |
200 | for (i = 0; i < header->e_shnum; i++) { |
200 | elf_section_header_t section_hdr; |
201 | elf_section_header_t section_hdr; |
201 | 202 | ||
202 | /* Seek to start of section header */ |
203 | /* Seek to start of section header */ |
203 | lseek(elf->fd, header->e_shoff |
204 | lseek(elf->fd, header->e_shoff |
204 | + i * sizeof(elf_section_header_t), SEEK_SET); |
205 | + i * sizeof(elf_section_header_t), SEEK_SET); |
205 | 206 | ||
206 | rc = read(elf->fd, §ion_hdr, sizeof(elf_section_header_t)); |
207 | rc = read(elf->fd, §ion_hdr, sizeof(elf_section_header_t)); |
207 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
208 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
208 | 209 | ||
209 | rc = section_header(elf, §ion_hdr); |
210 | rc = section_header(elf, §ion_hdr); |
210 | if (rc != EE_OK) |
211 | if (rc != EE_OK) |
211 | return rc; |
212 | return rc; |
212 | } |
213 | } |
213 | 214 | ||
214 | elf->info->entry = |
215 | elf->info->entry = |
215 | (entry_point_t)((uint8_t *)header->e_entry + elf->bias); |
216 | (entry_point_t)((uint8_t *)header->e_entry + elf->bias); |
216 | 217 | ||
217 | printf("done\n"); |
218 | printf("done\n"); |
218 | 219 | ||
219 | return EE_OK; |
220 | return EE_OK; |
220 | } |
221 | } |
221 | 222 | ||
222 | /** Print error message according to error code. |
223 | /** Print error message according to error code. |
223 | * |
224 | * |
224 | * @param rc Return code returned by elf_load(). |
225 | * @param rc Return code returned by elf_load(). |
225 | * |
226 | * |
226 | * @return NULL terminated description of error. |
227 | * @return NULL terminated description of error. |
227 | */ |
228 | */ |
228 | char *elf_error(unsigned int rc) |
229 | char *elf_error(unsigned int rc) |
229 | { |
230 | { |
230 | assert(rc < sizeof(error_codes) / sizeof(char *)); |
231 | assert(rc < sizeof(error_codes) / sizeof(char *)); |
231 | 232 | ||
232 | return error_codes[rc]; |
233 | return error_codes[rc]; |
233 | } |
234 | } |
234 | 235 | ||
235 | /** Process segment header. |
236 | /** Process segment header. |
236 | * |
237 | * |
237 | * @param entry Segment header. |
238 | * @param entry Segment header. |
238 | * @param elf ELF header. |
239 | * @param elf ELF header. |
239 | * |
240 | * |
240 | * @return EE_OK on success, error code otherwise. |
241 | * @return EE_OK on success, error code otherwise. |
241 | */ |
242 | */ |
242 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry) |
243 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry) |
243 | { |
244 | { |
244 | switch (entry->p_type) { |
245 | switch (entry->p_type) { |
245 | case PT_NULL: |
246 | case PT_NULL: |
246 | case PT_PHDR: |
247 | case PT_PHDR: |
247 | break; |
248 | break; |
248 | case PT_LOAD: |
249 | case PT_LOAD: |
249 | return load_segment(elf, entry); |
250 | return load_segment(elf, entry); |
250 | break; |
251 | break; |
251 | case PT_DYNAMIC: |
252 | case PT_DYNAMIC: |
252 | case PT_INTERP: |
253 | case PT_INTERP: |
253 | case PT_SHLIB: |
254 | case PT_SHLIB: |
254 | case PT_NOTE: |
255 | case PT_NOTE: |
255 | case PT_LOPROC: |
256 | case PT_LOPROC: |
256 | case PT_HIPROC: |
257 | case PT_HIPROC: |
257 | default: |
258 | default: |
258 | printf("segment p_type %d unknown\n", entry->p_type); |
259 | printf("segment p_type %d unknown\n", entry->p_type); |
259 | return EE_UNSUPPORTED; |
260 | return EE_UNSUPPORTED; |
260 | break; |
261 | break; |
261 | } |
262 | } |
262 | return EE_OK; |
263 | return EE_OK; |
263 | } |
264 | } |
264 | 265 | ||
265 | /** Load segment described by program header entry. |
266 | /** Load segment described by program header entry. |
266 | * |
267 | * |
267 | * @param entry Program header entry describing segment to be loaded. |
268 | * @param entry Program header entry describing segment to be loaded. |
268 | * @param elf ELF header. |
269 | * @param elf ELF header. |
269 | * |
270 | * |
270 | * @return EE_OK on success, error code otherwise. |
271 | * @return EE_OK on success, error code otherwise. |
271 | */ |
272 | */ |
272 | int load_segment(elf_ld_t *elf, elf_segment_header_t *entry) |
273 | int load_segment(elf_ld_t *elf, elf_segment_header_t *entry) |
273 | { |
274 | { |
274 | void *a; |
275 | void *a; |
275 | int flags = 0; |
276 | int flags = 0; |
276 | uintptr_t bias; |
277 | uintptr_t bias; |
277 | int rc; |
278 | int rc; |
278 | 279 | ||
279 | printf("load segment at addr 0x%x, size 0x%x\n", entry->p_vaddr, |
280 | printf("load segment at addr 0x%x, size 0x%x\n", entry->p_vaddr, |
280 | entry->p_memsz); |
281 | entry->p_memsz); |
281 | 282 | ||
282 | bias = elf->bias; |
283 | bias = elf->bias; |
283 | 284 | ||
284 | if (entry->p_align > 1) { |
285 | if (entry->p_align > 1) { |
285 | if ((entry->p_offset % entry->p_align) != |
286 | if ((entry->p_offset % entry->p_align) != |
286 | (entry->p_vaddr % entry->p_align)) { |
287 | (entry->p_vaddr % entry->p_align)) { |
287 | printf("align check 1 failed offset%%align=%d, vaddr%%align=%d\n", |
288 | printf("align check 1 failed offset%%align=%d, vaddr%%align=%d\n", |
288 | entry->p_offset % entry->p_align, |
289 | entry->p_offset % entry->p_align, |
289 | entry->p_vaddr % entry->p_align |
290 | entry->p_vaddr % entry->p_align |
290 | ); |
291 | ); |
291 | return EE_INVALID; |
292 | return EE_INVALID; |
292 | } |
293 | } |
293 | } |
294 | } |
294 | 295 | ||
295 | /* if (entry->p_flags & PF_X) |
296 | /* if (entry->p_flags & PF_X) |
296 | flags |= AS_AREA_EXEC; |
297 | flags |= AS_AREA_EXEC; |
297 | if (entry->p_flags & PF_W) |
298 | if (entry->p_flags & PF_W) |
298 | flags |= AS_AREA_WRITE; |
299 | flags |= AS_AREA_WRITE; |
299 | if (entry->p_flags & PF_R) |
300 | if (entry->p_flags & PF_R) |
300 | flags |= AS_AREA_READ; |
301 | flags |= AS_AREA_READ; |
301 | flags |= AS_AREA_CACHEABLE; |
302 | flags |= AS_AREA_CACHEABLE; |
302 | */ |
303 | */ |
303 | /* FIXME: Kernel won't normally allow this, unless you "patch" it */ |
304 | /* FIXME: Kernel won't normally allow this, unless you "patch" it */ |
304 | // flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_EXEC | AS_AREA_CACHEABLE; |
305 | // flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_EXEC | AS_AREA_CACHEABLE; |
305 | flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
306 | flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
306 | 307 | ||
307 | /* |
308 | /* |
308 | * Check if the virtual address starts on page boundary. |
309 | * Check if the virtual address starts on page boundary. |
309 | */ |
310 | */ |
310 | if (ALIGN_UP(entry->p_vaddr, PAGE_SIZE) != entry->p_vaddr) { |
311 | if (ALIGN_UP(entry->p_vaddr, PAGE_SIZE) != entry->p_vaddr) { |
311 | printf("align check 2 failed - not page-aligned\n"); |
312 | printf("align check 2 failed - not page-aligned\n"); |
312 | printf("vaddr = 0x%x, should be 0x%x\n", |
313 | printf("vaddr = 0x%x, should be 0x%x\n", |
313 | entry->p_vaddr, ALIGN_UP(entry->p_vaddr, PAGE_SIZE)); |
314 | entry->p_vaddr, ALIGN_UP(entry->p_vaddr, PAGE_SIZE)); |
314 | return EE_UNSUPPORTED; |
315 | return EE_UNSUPPORTED; |
315 | } |
316 | } |
316 | 317 | ||
317 | printf("map to p_vaddr=0x%x-0x%x...\n", entry->p_vaddr + bias, |
318 | printf("map to p_vaddr=0x%x-0x%x...\n", entry->p_vaddr + bias, |
318 | entry->p_vaddr + bias + ALIGN_UP(entry->p_memsz, PAGE_SIZE)); |
319 | entry->p_vaddr + bias + ALIGN_UP(entry->p_memsz, PAGE_SIZE)); |
319 | 320 | ||
320 | a = as_area_create((uint8_t *)entry->p_vaddr + bias, |
321 | a = as_area_create((uint8_t *)entry->p_vaddr + bias, |
321 | entry->p_memsz, flags); |
322 | entry->p_memsz, flags); |
322 | if (a == (void *)(-1)) { |
323 | if (a == (void *)(-1)) { |
323 | printf("memory mapping failed\n"); |
324 | printf("memory mapping failed\n"); |
324 | return EE_MEMORY; |
325 | return EE_MEMORY; |
325 | } |
326 | } |
326 | 327 | ||
327 | printf("as_area_create(0x%x, 0x%x, %d) -> 0x%x\n", |
328 | printf("as_area_create(0x%x, 0x%x, %d) -> 0x%x\n", |
328 | entry->p_vaddr+bias, entry->p_memsz, flags, (unsigned)a); |
329 | entry->p_vaddr+bias, entry->p_memsz, flags, (unsigned)a); |
329 | 330 | ||
330 | /* |
331 | /* |
331 | * Load segment data |
332 | * Load segment data |
332 | */ |
333 | */ |
333 | printf("seek to %d\n", entry->p_offset); |
334 | printf("seek to %d\n", entry->p_offset); |
334 | rc = lseek(elf->fd, entry->p_offset, SEEK_SET); |
335 | rc = lseek(elf->fd, entry->p_offset, SEEK_SET); |
335 | if (rc < 0) { printf("seek error\n"); return EE_INVALID; } |
336 | if (rc < 0) { printf("seek error\n"); return EE_INVALID; } |
336 | 337 | ||
337 | printf("read 0x%x bytes to address 0x%x\n", entry->p_filesz, entry->p_vaddr+bias); |
338 | printf("read 0x%x bytes to address 0x%x\n", entry->p_filesz, entry->p_vaddr+bias); |
338 | /* rc = read(fd, (void *)(entry->p_vaddr + bias), entry->p_filesz); |
339 | /* rc = read(fd, (void *)(entry->p_vaddr + bias), entry->p_filesz); |
339 | if (rc < 0) { printf("read error\n"); return EE_INVALID; }*/ |
340 | if (rc < 0) { printf("read error\n"); return EE_INVALID; }*/ |
340 | unsigned left, now; |
341 | unsigned left, now; |
341 | uint8_t *dp; |
342 | uint8_t *dp; |
342 | 343 | ||
343 | left = entry->p_filesz; |
344 | left = entry->p_filesz; |
344 | dp = (uint8_t *)(entry->p_vaddr + bias); |
345 | dp = (uint8_t *)(entry->p_vaddr + bias); |
345 | 346 | ||
346 | while (left > 0) { |
347 | while (left > 0) { |
347 | now = 4096; |
348 | now = 4096; |
348 | if (now > left) now=left; |
349 | if (now > left) now=left; |
349 | printf("read %d...", now); |
350 | printf("read %d...", now); |
350 | rc = read(elf->fd, dp, now); |
351 | rc = read(elf->fd, dp, now); |
351 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
352 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
352 | printf("->%d\n", rc); |
353 | printf("->%d\n", rc); |
353 | left -= now; |
354 | left -= now; |
354 | dp += now; |
355 | dp += now; |
355 | } |
356 | } |
356 | 357 | ||
357 | return EE_OK; |
358 | return EE_OK; |
358 | } |
359 | } |
359 | 360 | ||
360 | /** Process section header. |
361 | /** Process section header. |
361 | * |
362 | * |
362 | * @param entry Segment header. |
363 | * @param entry Segment header. |
363 | * @param elf ELF header. |
364 | * @param elf ELF header. |
364 | * |
365 | * |
365 | * @return EE_OK on success, error code otherwise. |
366 | * @return EE_OK on success, error code otherwise. |
366 | */ |
367 | */ |
367 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry) |
368 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry) |
368 | { |
369 | { |
369 | switch (entry->sh_type) { |
370 | switch (entry->sh_type) { |
370 | case SHT_PROGBITS: |
371 | case SHT_PROGBITS: |
371 | if (entry->sh_flags & SHF_TLS) { |
372 | if (entry->sh_flags & SHF_TLS) { |
372 | /* .tdata */ |
373 | /* .tdata */ |
373 | } |
374 | } |
374 | break; |
375 | break; |
375 | case SHT_NOBITS: |
376 | case SHT_NOBITS: |
376 | if (entry->sh_flags & SHF_TLS) { |
377 | if (entry->sh_flags & SHF_TLS) { |
377 | /* .tbss */ |
378 | /* .tbss */ |
378 | } |
379 | } |
379 | break; |
380 | break; |
380 | case SHT_DYNAMIC: |
381 | case SHT_DYNAMIC: |
381 | elf->info->dynamic = |
382 | elf->info->dynamic = |
382 | (void *)((uint8_t *)entry->sh_addr + elf->bias); |
383 | (void *)((uint8_t *)entry->sh_addr + elf->bias); |
383 | printf("dynamic section found at 0x%x\n", |
384 | printf("dynamic section found at 0x%x\n", |
384 | (uintptr_t)elf->info->dynamic); |
385 | (uintptr_t)elf->info->dynamic); |
385 | break; |
386 | break; |
386 | default: |
387 | default: |
387 | break; |
388 | break; |
388 | } |
389 | } |
389 | 390 | ||
390 | return EE_OK; |
391 | return EE_OK; |
391 | } |
392 | } |
392 | 393 | ||
393 | /** @} |
394 | /** @} |
394 | */ |
395 | */ |
395 | 396 |