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Rev 3223 | Rev 3315 | ||
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Line 69... | Line 69... | ||
69 | static unsigned int elf_load(elf_ld_t *elf, size_t so_bias); |
69 | static unsigned int elf_load(elf_ld_t *elf, size_t so_bias); |
70 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
70 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
71 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
71 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
72 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
72 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
73 | 73 | ||
- | 74 | /** Read until the buffer is read in its entirety. */ |
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- | 75 | static int my_read(int fd, char *buf, size_t len) |
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- | 76 | { |
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- | 77 | int cnt = 0; |
|
- | 78 | do { |
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- | 79 | buf += cnt; |
|
- | 80 | len -= cnt; |
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- | 81 | cnt = read(fd, buf, len); |
|
- | 82 | } while ((cnt > 0) && ((len - cnt) > 0)); |
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- | 83 | ||
- | 84 | return cnt; |
|
- | 85 | } |
|
- | 86 | ||
74 | /** Load ELF binary from a file. |
87 | /** Load ELF binary from a file. |
75 | * |
88 | * |
76 | * Load an ELF binary from the specified file. If the file is |
89 | * Load an ELF binary from the specified file. If the file is |
77 | * an executable program, it is loaded unbiased. If it is a shared |
90 | * an executable program, it is loaded unbiased. If it is a shared |
78 | * object, it is loaded with the bias @a so_bias. Some information |
91 | * object, it is loaded with the bias @a so_bias. Some information |
Line 154... | Line 167... | ||
154 | { |
167 | { |
155 | elf_header_t header_buf; |
168 | elf_header_t header_buf; |
156 | elf_header_t *header = &header_buf; |
169 | elf_header_t *header = &header_buf; |
157 | int i, rc; |
170 | int i, rc; |
158 | 171 | ||
159 | rc = read(elf->fd, header, sizeof(elf_header_t)); |
172 | rc = my_read(elf->fd, header, sizeof(elf_header_t)); |
160 | if (rc < 0) { |
173 | if (rc < 0) { |
161 | printf("read error\n"); |
174 | printf("read error\n"); |
162 | return EE_INVALID; |
175 | return EE_INVALID; |
163 | } |
176 | } |
164 | 177 | ||
Line 221... | Line 234... | ||
221 | 234 | ||
222 | /* Seek to start of segment header */ |
235 | /* Seek to start of segment header */ |
223 | lseek(elf->fd, header->e_phoff |
236 | lseek(elf->fd, header->e_phoff |
224 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
237 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
225 | 238 | ||
- | 239 | rc = my_read(elf->fd, &segment_hdr, |
|
226 | rc = read(elf->fd, &segment_hdr, sizeof(elf_segment_header_t)); |
240 | sizeof(elf_segment_header_t)); |
227 | if (rc < 0) { |
241 | if (rc < 0) { |
228 | printf("read error\n"); |
242 | printf("read error\n"); |
229 | return EE_INVALID; |
243 | return EE_INVALID; |
230 | } |
244 | } |
231 | 245 | ||
Line 242... | Line 256... | ||
242 | 256 | ||
243 | /* Seek to start of section header */ |
257 | /* Seek to start of section header */ |
244 | lseek(elf->fd, header->e_shoff |
258 | lseek(elf->fd, header->e_shoff |
245 | + i * sizeof(elf_section_header_t), SEEK_SET); |
259 | + i * sizeof(elf_section_header_t), SEEK_SET); |
246 | 260 | ||
- | 261 | rc = my_read(elf->fd, §ion_hdr, |
|
247 | rc = read(elf->fd, §ion_hdr, sizeof(elf_section_header_t)); |
262 | sizeof(elf_section_header_t)); |
248 | if (rc < 0) { |
263 | if (rc < 0) { |
249 | printf("read error\n"); |
264 | printf("read error\n"); |
250 | return EE_INVALID; |
265 | return EE_INVALID; |
251 | } |
266 | } |
252 | 267 | ||
Line 359... | Line 374... | ||
359 | 374 | ||
360 | /* |
375 | /* |
361 | * For the course of loading, the area needs to be readable |
376 | * For the course of loading, the area needs to be readable |
362 | * and writeable. |
377 | * and writeable. |
363 | */ |
378 | */ |
364 | a = as_area_create((uint8_t *)base + bias, |
379 | a = as_area_create((uint8_t *)base + bias, mem_sz, |
365 | mem_sz, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE); |
380 | AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE); |
366 | if (a == (void *)(-1)) { |
381 | if (a == (void *)(-1)) { |
367 | printf("memory mapping failed\n"); |
382 | printf("memory mapping failed\n"); |
368 | return EE_MEMORY; |
383 | return EE_MEMORY; |
369 | } |
384 | } |
370 | 385 | ||
Line 396... | Line 411... | ||
396 | while (left > 0) { |
411 | while (left > 0) { |
397 | now = 16384; |
412 | now = 16384; |
398 | if (now > left) now = left; |
413 | if (now > left) now = left; |
399 | 414 | ||
400 | // printf("read %d...", now); |
415 | // printf("read %d...", now); |
401 | rc = read(elf->fd, dp, now); |
416 | rc = my_read(elf->fd, dp, now); |
402 | // printf("->%d\n", rc); |
417 | // printf("->%d\n", rc); |
403 | 418 | ||
404 | if (rc < 0) { |
419 | if (rc < 0) { |
405 | printf("read error\n"); |
420 | printf("read error\n"); |
406 | return EE_INVALID; |
421 | return EE_INVALID; |