1 | /* |
---|
2 | * COPYRIGHT (c) 2012-2013 Chris Johns <chrisj@rtems.org> |
---|
3 | * |
---|
4 | * The license and distribution terms for this file may be |
---|
5 | * found in the file LICENSE in this distribution or at |
---|
6 | * http://www.rtems.org/license/LICENSE. |
---|
7 | */ |
---|
8 | /** |
---|
9 | * @file |
---|
10 | * |
---|
11 | * @ingroup rtems_rtld |
---|
12 | * |
---|
13 | * @brief RTEMS Run-Time Link Editor |
---|
14 | * |
---|
15 | * This is the RAP format loader support.. |
---|
16 | */ |
---|
17 | |
---|
18 | #if HAVE_CONFIG_H |
---|
19 | #include "config.h" |
---|
20 | #endif |
---|
21 | |
---|
22 | #include <errno.h> |
---|
23 | #include <fcntl.h> |
---|
24 | #include <stdlib.h> |
---|
25 | #include <string.h> |
---|
26 | #include <stdio.h> |
---|
27 | #include <unistd.h> |
---|
28 | |
---|
29 | #include <rtems/rtl/rtl.h> |
---|
30 | #include "rtl-elf.h" |
---|
31 | #include "rtl-error.h" |
---|
32 | #include "rtl-obj-comp.h" |
---|
33 | #include "rtl-rap.h" |
---|
34 | #include "rtl-trace.h" |
---|
35 | #include "rtl-unresolved.h" |
---|
36 | |
---|
37 | /** |
---|
38 | * The offsets in the unresolved array. |
---|
39 | */ |
---|
40 | #define REL_R_OFFSET (0) |
---|
41 | #define REL_R_INFO (1) |
---|
42 | #define REL_R_ADDEND (2) |
---|
43 | |
---|
44 | /** |
---|
45 | * The ELF format signature. |
---|
46 | */ |
---|
47 | static rtems_rtl_loader_format_t rap_sig = |
---|
48 | { |
---|
49 | .label = "RAP", |
---|
50 | .flags = RTEMS_RTL_FMT_COMP |
---|
51 | }; |
---|
52 | |
---|
53 | /** |
---|
54 | * The section definitions found in a RAP file. |
---|
55 | */ |
---|
56 | typedef struct rtems_rtl_rap_sectdef_s |
---|
57 | { |
---|
58 | const char* name; /**< Name of the section. */ |
---|
59 | const uint32_t flags; /**< Section flags. */ |
---|
60 | } rtems_rtl_rap_sectdef_t; |
---|
61 | |
---|
62 | /** |
---|
63 | * The section indexes. These are fixed. |
---|
64 | */ |
---|
65 | #define RTEMS_RTL_RAP_TEXT_SEC (0) |
---|
66 | #define RTEMS_RTL_RAP_CONST_SEC (1) |
---|
67 | #define RTEMS_RTL_RAP_CTOR_SEC (2) |
---|
68 | #define RTEMS_RTL_RAP_DTOR_SEC (3) |
---|
69 | #define RTEMS_RTL_RAP_DATA_SEC (4) |
---|
70 | #define RTEMS_RTL_RAP_BSS_SEC (5) |
---|
71 | #define RTEMS_RTL_RAP_SECS (6) |
---|
72 | |
---|
73 | /** |
---|
74 | * The sections as loaded from a RAP file. |
---|
75 | */ |
---|
76 | static const rtems_rtl_rap_sectdef_t rap_sections[RTEMS_RTL_RAP_SECS] = |
---|
77 | { |
---|
78 | { ".text", RTEMS_RTL_OBJ_SECT_TEXT | RTEMS_RTL_OBJ_SECT_LOAD }, |
---|
79 | { ".const", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD }, |
---|
80 | { ".ctor", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD | RTEMS_RTL_OBJ_SECT_CTOR }, |
---|
81 | { ".dtor", RTEMS_RTL_OBJ_SECT_CONST | RTEMS_RTL_OBJ_SECT_LOAD | RTEMS_RTL_OBJ_SECT_DTOR }, |
---|
82 | { ".data", RTEMS_RTL_OBJ_SECT_DATA | RTEMS_RTL_OBJ_SECT_LOAD }, |
---|
83 | { ".bss", RTEMS_RTL_OBJ_SECT_BSS | RTEMS_RTL_OBJ_SECT_ZERO } |
---|
84 | }; |
---|
85 | |
---|
86 | /** |
---|
87 | * The section definitions found in a RAP file. |
---|
88 | */ |
---|
89 | typedef struct rtems_rtl_rap_section_s |
---|
90 | { |
---|
91 | uint32_t size; /**< The size of the section. */ |
---|
92 | uint32_t alignment; /**< The alignment of the section. */ |
---|
93 | } rtems_rtl_rap_section_t; |
---|
94 | |
---|
95 | /** |
---|
96 | * The RAP loader. |
---|
97 | */ |
---|
98 | typedef struct rtems_rtl_rap_s |
---|
99 | { |
---|
100 | rtems_rtl_obj_cache_t* file; /**< The file cache for the RAP file. */ |
---|
101 | rtems_rtl_obj_comp_t* decomp; /**< The decompression streamer. */ |
---|
102 | uint32_t length; /**< The file length. */ |
---|
103 | uint32_t version; /**< The RAP file version. */ |
---|
104 | uint32_t compression; /**< The type of compression. */ |
---|
105 | uint32_t checksum; /**< The checksum. */ |
---|
106 | uint32_t machinetype; /**< The ELF machine type. */ |
---|
107 | uint32_t datatype; /**< The ELF data type. */ |
---|
108 | uint32_t class; /**< The ELF class. */ |
---|
109 | uint32_t init; /**< The initialisation strtab offset. */ |
---|
110 | uint32_t fini; /**< The finish strtab offset. */ |
---|
111 | rtems_rtl_rap_section_t secs[RTEMS_RTL_RAP_SECS]; /**< The sections. */ |
---|
112 | uint32_t symtab_size; /**< The symbol table size. */ |
---|
113 | char* strtab; /**< The string table. */ |
---|
114 | uint32_t strtab_size; /**< The string table size. */ |
---|
115 | uint32_t relocs_size; /**< The relocation table size. */ |
---|
116 | uint32_t symbols; /**< The number of symbols. */ |
---|
117 | uint32_t strtable_size;/**< The size of section names and obj names. */ |
---|
118 | uint32_t rpathlen; /**< The length of rpath. */ |
---|
119 | char* strtable; /**< The detail string which resides in obj detail. */ |
---|
120 | } rtems_rtl_rap_t; |
---|
121 | |
---|
122 | /** |
---|
123 | * Check the machine type. |
---|
124 | */ |
---|
125 | static bool |
---|
126 | rtems_rtl_rap_machine_check (uint32_t machinetype) |
---|
127 | { |
---|
128 | /* |
---|
129 | * This code is determined by the machine headers. |
---|
130 | */ |
---|
131 | switch (machinetype) |
---|
132 | { |
---|
133 | ELFDEFNNAME (MACHDEP_ID_CASES) |
---|
134 | default: |
---|
135 | return false; |
---|
136 | } |
---|
137 | return true; |
---|
138 | } |
---|
139 | |
---|
140 | /** |
---|
141 | * Check the data type. |
---|
142 | */ |
---|
143 | static bool |
---|
144 | rtems_rtl_rap_datatype_check (uint32_t datatype) |
---|
145 | { |
---|
146 | /* |
---|
147 | * This code is determined by the machine headers. |
---|
148 | */ |
---|
149 | if (datatype != ELFDEFNNAME (MACHDEP_ENDIANNESS)) |
---|
150 | return false; |
---|
151 | return true; |
---|
152 | } |
---|
153 | |
---|
154 | /** |
---|
155 | * Check the class of executable. |
---|
156 | */ |
---|
157 | static bool |
---|
158 | rtems_rtl_rap_class_check (uint32_t class) |
---|
159 | { |
---|
160 | /* |
---|
161 | * This code is determined by the machine headers. |
---|
162 | */ |
---|
163 | switch (class) |
---|
164 | { |
---|
165 | case ELFCLASS32: |
---|
166 | if (ARCH_ELFSIZE == 32) |
---|
167 | return true; |
---|
168 | break; |
---|
169 | case ELFCLASS64: |
---|
170 | if (ARCH_ELFSIZE == 64) |
---|
171 | return true; |
---|
172 | break; |
---|
173 | default: |
---|
174 | break; |
---|
175 | } |
---|
176 | return false; |
---|
177 | } |
---|
178 | |
---|
179 | static uint32_t |
---|
180 | rtems_rtl_rap_get_uint32 (const uint8_t* buffer) |
---|
181 | { |
---|
182 | uint32_t value = 0; |
---|
183 | int b; |
---|
184 | for (b = 0; b < sizeof (uint32_t); ++b) |
---|
185 | { |
---|
186 | value <<= 8; |
---|
187 | value |= buffer[b]; |
---|
188 | } |
---|
189 | return value; |
---|
190 | } |
---|
191 | |
---|
192 | static bool |
---|
193 | rtems_rtl_rap_read_uint32 (rtems_rtl_obj_comp_t* comp, uint32_t* value) |
---|
194 | { |
---|
195 | uint8_t buffer[sizeof (uint32_t)]; |
---|
196 | |
---|
197 | if (!rtems_rtl_obj_comp_read (comp, buffer, sizeof (uint32_t))) |
---|
198 | return false; |
---|
199 | |
---|
200 | *value = rtems_rtl_rap_get_uint32 (buffer); |
---|
201 | |
---|
202 | return true; |
---|
203 | } |
---|
204 | |
---|
205 | static bool |
---|
206 | rtems_rtl_rap_loader (rtems_rtl_obj_t* obj, |
---|
207 | int fd, |
---|
208 | rtems_rtl_obj_sect_t* sect, |
---|
209 | void* data) |
---|
210 | { |
---|
211 | rtems_rtl_rap_t* rap = (rtems_rtl_rap_t*) data; |
---|
212 | |
---|
213 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
214 | printf ("rtl: rap: input %s=%lu\n", |
---|
215 | sect->name, rtems_rtl_obj_comp_input (rap->decomp)); |
---|
216 | |
---|
217 | return rtems_rtl_obj_comp_read (rap->decomp, sect->base, sect->size); |
---|
218 | } |
---|
219 | |
---|
220 | static bool |
---|
221 | rtems_rtl_rap_relocate (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
---|
222 | { |
---|
223 | #define SYMNAME_BUFFER_SIZE (1024) |
---|
224 | char* symname_buffer = NULL; |
---|
225 | int section; |
---|
226 | |
---|
227 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
228 | printf ("rtl: relocation\n"); |
---|
229 | |
---|
230 | symname_buffer = malloc (SYMNAME_BUFFER_SIZE); |
---|
231 | if (!symname_buffer) |
---|
232 | { |
---|
233 | rtems_rtl_set_error (ENOMEM, "no memory for local symbol name buffer"); |
---|
234 | return false; |
---|
235 | } |
---|
236 | |
---|
237 | for (section = 0; section < RTEMS_RTL_RAP_SECS; ++section) |
---|
238 | { |
---|
239 | rtems_rtl_obj_sect_t* targetsect; |
---|
240 | uint32_t header = 0; |
---|
241 | int relocs; |
---|
242 | bool is_rela; |
---|
243 | int r; |
---|
244 | |
---|
245 | targetsect = rtems_rtl_obj_find_section (obj, rap_sections[section].name); |
---|
246 | |
---|
247 | if (!targetsect) |
---|
248 | { |
---|
249 | rtems_rtl_set_error (EINVAL, "no target section found"); |
---|
250 | free (symname_buffer); |
---|
251 | return false; |
---|
252 | } |
---|
253 | |
---|
254 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &header)) |
---|
255 | { |
---|
256 | free (symname_buffer); |
---|
257 | return false; |
---|
258 | } |
---|
259 | |
---|
260 | /* |
---|
261 | * Bit 31 of the header indicates if the relocations for this section |
---|
262 | * have a valid addend field. |
---|
263 | */ |
---|
264 | |
---|
265 | is_rela = (header & (1 << 31)) != 0 ? true : false; |
---|
266 | relocs = header & ~(1 << 31); |
---|
267 | |
---|
268 | if (relocs && rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
269 | printf ("rtl: relocation: %s: header: %08lx relocs: %d %s\n", |
---|
270 | rap_sections[section].name, |
---|
271 | header, relocs, is_rela ? "rela" : "rel"); |
---|
272 | |
---|
273 | for (r = 0; r < relocs; ++r) |
---|
274 | { |
---|
275 | uint32_t info = 0; |
---|
276 | uint32_t offset = 0; |
---|
277 | uint32_t addend = 0; |
---|
278 | Elf_Word type; |
---|
279 | const char* symname = NULL; |
---|
280 | uint32_t symname_size; |
---|
281 | Elf_Word symtype = 0; |
---|
282 | Elf_Word symvalue = 0; |
---|
283 | |
---|
284 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &info)) |
---|
285 | { |
---|
286 | free (symname_buffer); |
---|
287 | return false; |
---|
288 | } |
---|
289 | |
---|
290 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &offset)) |
---|
291 | { |
---|
292 | free (symname_buffer); |
---|
293 | return false; |
---|
294 | } |
---|
295 | |
---|
296 | /* |
---|
297 | * The types are: |
---|
298 | * |
---|
299 | * 0 Section symbol offset in addend. |
---|
300 | * 1 Symbol appended to the relocation record. |
---|
301 | * 2 Symbol is in the strtabl. |
---|
302 | * |
---|
303 | * If type 2 bits 30:8 is the offset in the strtab. If type 1 the bits |
---|
304 | * are the size of the string. The lower 8 bits of the info field if the |
---|
305 | * ELF relocation type field. |
---|
306 | */ |
---|
307 | |
---|
308 | if (((info & (1 << 31)) == 0) || is_rela) |
---|
309 | { |
---|
310 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &addend)) |
---|
311 | { |
---|
312 | free (symname_buffer); |
---|
313 | return false; |
---|
314 | } |
---|
315 | } |
---|
316 | |
---|
317 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
318 | printf (" %2d: info=%08lx offset=%lu addend=%lu\n", |
---|
319 | r, info, offset, addend); |
---|
320 | |
---|
321 | type = info & 0xff; |
---|
322 | |
---|
323 | if ((info & (1 << 31)) == 0) |
---|
324 | { |
---|
325 | rtems_rtl_obj_sect_t* symsect; |
---|
326 | |
---|
327 | symsect = rtems_rtl_obj_find_section_by_index (obj, info >> 8); |
---|
328 | if (!symsect) |
---|
329 | { |
---|
330 | free (symname_buffer); |
---|
331 | return false; |
---|
332 | } |
---|
333 | |
---|
334 | symvalue = (Elf_Word) symsect->base + addend; |
---|
335 | } |
---|
336 | else if (rtems_rtl_elf_rel_resolve_sym (type)) |
---|
337 | { |
---|
338 | rtems_rtl_obj_sym_t* symbol; |
---|
339 | |
---|
340 | symname_size = (info & ~(3 << 30)) >> 8; |
---|
341 | |
---|
342 | if ((info & (1 << 30)) != 0) |
---|
343 | { |
---|
344 | symname = rap->strtab + symname_size; |
---|
345 | } |
---|
346 | else |
---|
347 | { |
---|
348 | if (symname_size > (SYMNAME_BUFFER_SIZE - 1)) |
---|
349 | { |
---|
350 | free (symname_buffer); |
---|
351 | rtems_rtl_set_error (EINVAL, "reloc symbol too big"); |
---|
352 | return false; |
---|
353 | } |
---|
354 | |
---|
355 | if (!rtems_rtl_obj_comp_read (rap->decomp, symname_buffer, symname_size)) |
---|
356 | { |
---|
357 | free (symname_buffer); |
---|
358 | return false; |
---|
359 | } |
---|
360 | |
---|
361 | symname_buffer[symname_size] = '\0'; |
---|
362 | symname = symname_buffer; |
---|
363 | } |
---|
364 | |
---|
365 | symbol = rtems_rtl_symbol_obj_find (obj, symname); |
---|
366 | |
---|
367 | if (!symbol) |
---|
368 | { |
---|
369 | rtems_rtl_set_error (EINVAL, "global symbol not found: %s", symname); |
---|
370 | free (symname_buffer); |
---|
371 | return false; |
---|
372 | } |
---|
373 | |
---|
374 | symvalue = (Elf_Word) symbol->value; |
---|
375 | } |
---|
376 | |
---|
377 | if (is_rela) |
---|
378 | { |
---|
379 | Elf_Rela rela; |
---|
380 | |
---|
381 | rela.r_offset = offset; |
---|
382 | rela.r_info = type; |
---|
383 | |
---|
384 | if ((info & (1 << 31)) == 0) |
---|
385 | rela.r_addend = 0; |
---|
386 | else rela.r_addend = addend; |
---|
387 | |
---|
388 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
389 | printf (" %2d: rela: type:%-2d off:%lu addend:%d" \ |
---|
390 | " symname=%s symtype=%lu symvalue=0x%08lx\n", |
---|
391 | r, (int) type, offset, (int) addend, |
---|
392 | symname, symtype, symvalue); |
---|
393 | |
---|
394 | if (!rtems_rtl_elf_relocate_rela (obj, &rela, targetsect, |
---|
395 | symname, symtype, symvalue)) |
---|
396 | { |
---|
397 | free (symname_buffer); |
---|
398 | return false; |
---|
399 | } |
---|
400 | } |
---|
401 | else |
---|
402 | { |
---|
403 | Elf_Rel rel; |
---|
404 | |
---|
405 | rel.r_offset = offset; |
---|
406 | rel.r_info = type; |
---|
407 | |
---|
408 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) |
---|
409 | printf (" %2d: rel: type:%-2d off:%lu" \ |
---|
410 | " symname=%s symtype=%lu symvalue=0x%08lx\n", |
---|
411 | r, (int) type, offset, |
---|
412 | symname, symtype, symvalue); |
---|
413 | |
---|
414 | if (!rtems_rtl_elf_relocate_rel (obj, &rel, targetsect, |
---|
415 | symname, symtype, symvalue)) |
---|
416 | { |
---|
417 | free (symname_buffer); |
---|
418 | return false; |
---|
419 | } |
---|
420 | } |
---|
421 | } |
---|
422 | } |
---|
423 | |
---|
424 | free (symname_buffer); |
---|
425 | |
---|
426 | return true; |
---|
427 | } |
---|
428 | |
---|
429 | /** |
---|
430 | * The structure of obj->detail is |
---|
431 | * |
---|
432 | * |object_detail(0..obj_num)|section_detail(0..sec_num[0..obj_num])| |
---|
433 | * obj_name(0..obj_num)|section_name(0..sec_num[0..obj_num]) |
---|
434 | * |
---|
435 | */ |
---|
436 | static bool |
---|
437 | rtems_rtl_rap_load_details (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
---|
438 | { |
---|
439 | struct link_map* tmp1; |
---|
440 | section_detail* tmp2; |
---|
441 | uint32_t obj_detail_size; |
---|
442 | uint32_t pos = 0; |
---|
443 | int i,j; |
---|
444 | |
---|
445 | obj_detail_size = sizeof (struct link_map) * obj->obj_num; |
---|
446 | |
---|
447 | for (i = 0; i < obj->obj_num; ++i) |
---|
448 | { |
---|
449 | obj_detail_size += (obj->sec_num[i] * sizeof (section_detail)); |
---|
450 | } |
---|
451 | |
---|
452 | obj->detail = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
---|
453 | obj_detail_size + rap->strtable_size, true); |
---|
454 | |
---|
455 | if (!obj->detail) |
---|
456 | { |
---|
457 | rap->strtable_size = 0; |
---|
458 | rtems_rtl_set_error (ENOMEM, "no memory for obj global syms"); |
---|
459 | return false; |
---|
460 | } |
---|
461 | |
---|
462 | rap->strtable = obj->detail + obj_detail_size; |
---|
463 | |
---|
464 | /* Read the obj names and section names */ |
---|
465 | if (!rtems_rtl_obj_comp_read (rap->decomp, rap->strtable, |
---|
466 | rap->strtable_size)) |
---|
467 | { |
---|
468 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, obj->detail); |
---|
469 | return false; |
---|
470 | } |
---|
471 | |
---|
472 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
473 | { |
---|
474 | if (rap->rpathlen > 0) |
---|
475 | printf ("File rpath:\n"); |
---|
476 | } |
---|
477 | |
---|
478 | while (pos < rap->rpathlen) |
---|
479 | { |
---|
480 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
481 | { |
---|
482 | printf (" %s\n", rap->strtable + pos); |
---|
483 | } |
---|
484 | pos = pos + strlen (rap->strtable + pos) + 1; |
---|
485 | } |
---|
486 | |
---|
487 | if (rap->rpathlen > 0) |
---|
488 | pos = rap->rpathlen; |
---|
489 | |
---|
490 | for (i = 0; i < obj->obj_num; ++i) |
---|
491 | { |
---|
492 | tmp1 = (struct link_map*) (obj->detail) + i; |
---|
493 | tmp1->name = rap->strtable + pos; |
---|
494 | tmp1->sec_num = obj->sec_num[i]; |
---|
495 | tmp1->rpathlen = rap->rpathlen; |
---|
496 | tmp1->rpath = (char*) rap->strtable; |
---|
497 | pos += strlen (tmp1->name) + 1; |
---|
498 | |
---|
499 | if (!i) |
---|
500 | { |
---|
501 | tmp1->l_next = NULL; |
---|
502 | tmp1->l_prev = NULL; |
---|
503 | } |
---|
504 | else |
---|
505 | { |
---|
506 | (tmp1 - 1)->l_next = tmp1; |
---|
507 | tmp1->l_prev = tmp1 - 1; |
---|
508 | tmp1->l_next = NULL; |
---|
509 | } |
---|
510 | } |
---|
511 | |
---|
512 | tmp2 =(section_detail*) ((struct link_map*) (obj->detail) + obj->obj_num); |
---|
513 | |
---|
514 | for (i = 0; i < obj->obj_num; ++i) |
---|
515 | { |
---|
516 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
517 | { |
---|
518 | printf ("File %d: %s\n", i, ((struct link_map*) obj->detail + i)->name); |
---|
519 | printf ("Section: %d sections\n",(unsigned int) obj->sec_num[i]); |
---|
520 | } |
---|
521 | |
---|
522 | ((struct link_map*)obj->detail + i)->sec_detail = tmp2; |
---|
523 | |
---|
524 | for (j = 0; j < obj->sec_num[i]; ++j) |
---|
525 | { |
---|
526 | uint32_t name; |
---|
527 | uint32_t rap_id; |
---|
528 | uint32_t offset; |
---|
529 | uint32_t size; |
---|
530 | |
---|
531 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &name) || |
---|
532 | !rtems_rtl_rap_read_uint32 (rap->decomp, &offset) || |
---|
533 | !rtems_rtl_rap_read_uint32 (rap->decomp, &size)) |
---|
534 | { |
---|
535 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_SYMBOL, obj->detail); |
---|
536 | return false; |
---|
537 | } |
---|
538 | |
---|
539 | rap_id = offset >> 28; |
---|
540 | offset = offset & 0xfffffff; |
---|
541 | |
---|
542 | tmp2->name = rap->strtable + name; |
---|
543 | tmp2->offset = offset; |
---|
544 | tmp2->rap_id = rap_id; |
---|
545 | tmp2->size = size; |
---|
546 | pos += strlen (tmp2->name) + 1; |
---|
547 | |
---|
548 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
549 | { |
---|
550 | printf ("name:%16s offset:0x%08x rap_id:%d size:0x%x\n", |
---|
551 | tmp2->name, (unsigned int) tmp2->offset, |
---|
552 | (unsigned int) tmp2->rap_id, (unsigned int) tmp2->size); |
---|
553 | } |
---|
554 | |
---|
555 | tmp2 += 1; |
---|
556 | } |
---|
557 | } |
---|
558 | return true; |
---|
559 | } |
---|
560 | |
---|
561 | static bool |
---|
562 | rtems_rtl_rap_load_symbols (rtems_rtl_rap_t* rap, rtems_rtl_obj_t* obj) |
---|
563 | { |
---|
564 | rtems_rtl_obj_sym_t* gsym; |
---|
565 | int sym; |
---|
566 | |
---|
567 | obj->global_size = |
---|
568 | rap->symbols * sizeof (rtems_rtl_obj_sym_t) + rap->strtab_size; |
---|
569 | |
---|
570 | obj->global_table = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_SYMBOL, |
---|
571 | obj->global_size, true); |
---|
572 | if (!obj->global_table) |
---|
573 | { |
---|
574 | obj->global_size = 0; |
---|
575 | rtems_rtl_set_error (ENOMEM, "no memory for obj global syms"); |
---|
576 | return false; |
---|
577 | } |
---|
578 | |
---|
579 | obj->global_syms = rap->symbols; |
---|
580 | |
---|
581 | rap->strtab = (((char*) obj->global_table) + |
---|
582 | (rap->symbols * sizeof (rtems_rtl_obj_sym_t))); |
---|
583 | |
---|
584 | if (!rtems_rtl_obj_comp_read (rap->decomp, rap->strtab, rap->strtab_size)) |
---|
585 | return false; |
---|
586 | |
---|
587 | for (sym = 0, gsym = obj->global_table; sym < rap->symbols; ++sym) |
---|
588 | { |
---|
589 | rtems_rtl_obj_sect_t* symsect; |
---|
590 | uint32_t data; |
---|
591 | uint32_t name; |
---|
592 | uint32_t value; |
---|
593 | |
---|
594 | if (!rtems_rtl_rap_read_uint32 (rap->decomp, &data) || |
---|
595 | !rtems_rtl_rap_read_uint32 (rap->decomp, &name) || |
---|
596 | !rtems_rtl_rap_read_uint32 (rap->decomp, &value)) |
---|
597 | { |
---|
598 | free (obj->global_table); |
---|
599 | obj->global_table = NULL; |
---|
600 | obj->global_syms = 0; |
---|
601 | obj->global_size = 0; |
---|
602 | return false; |
---|
603 | } |
---|
604 | |
---|
605 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
606 | printf ("rtl: sym:load: data=0x%08lx name=0x%08lx value=0x%08lx\n", |
---|
607 | data, name, value); |
---|
608 | |
---|
609 | /* |
---|
610 | * If there is a globally exported symbol already present and this |
---|
611 | * symbol is not weak raise an error. If the symbol is weak and present |
---|
612 | * globally ignore this symbol and use the global one and if it is not |
---|
613 | * present take this symbol global or weak. We accept the first weak |
---|
614 | * symbol we find and make it globally exported. |
---|
615 | */ |
---|
616 | if (rtems_rtl_symbol_global_find (rap->strtab + name) && |
---|
617 | (ELF_ST_BIND (data & 0xffff) != STB_WEAK)) |
---|
618 | { |
---|
619 | rtems_rtl_set_error (EINVAL, |
---|
620 | "duplicate global symbol: %s", rap->strtab + name); |
---|
621 | free (obj->global_table); |
---|
622 | obj->global_table = NULL; |
---|
623 | obj->global_syms = 0; |
---|
624 | obj->global_size = 0; |
---|
625 | return false; |
---|
626 | } |
---|
627 | |
---|
628 | symsect = rtems_rtl_obj_find_section_by_index (obj, data >> 16); |
---|
629 | if (!symsect) |
---|
630 | { |
---|
631 | free (obj->global_table); |
---|
632 | obj->global_table = NULL; |
---|
633 | obj->global_syms = 0; |
---|
634 | obj->global_size = 0; |
---|
635 | rtems_rtl_set_error (EINVAL, "section index not found: %lu", data >> 16); |
---|
636 | return false; |
---|
637 | } |
---|
638 | |
---|
639 | rtems_chain_set_off_chain (&gsym->node); |
---|
640 | gsym->name = rap->strtab + name; |
---|
641 | gsym->value = (uint8_t*) (value + symsect->base); |
---|
642 | gsym->data = data & 0xffff; |
---|
643 | |
---|
644 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SYMBOL)) |
---|
645 | printf ("rtl: sym:add:%-2d name:%-20s bind:%-2d type:%-2d val:%8p sect:%d\n", |
---|
646 | sym, gsym->name, |
---|
647 | (int) ELF_ST_BIND (data & 0xffff), |
---|
648 | (int) ELF_ST_TYPE (data & 0xffff), |
---|
649 | gsym->value, (int) (data >> 16)); |
---|
650 | |
---|
651 | ++gsym; |
---|
652 | } |
---|
653 | |
---|
654 | return true; |
---|
655 | } |
---|
656 | |
---|
657 | static bool |
---|
658 | rtems_rtl_rap_parse_header (uint8_t* rhdr, |
---|
659 | size_t* rhdr_len, |
---|
660 | uint32_t* length, |
---|
661 | uint32_t* version, |
---|
662 | uint32_t* compression, |
---|
663 | uint32_t* checksum) |
---|
664 | { |
---|
665 | char* sptr = (char*) rhdr; |
---|
666 | char* eptr; |
---|
667 | |
---|
668 | *rhdr_len = 0; |
---|
669 | |
---|
670 | /* |
---|
671 | * "RAP," = 4 bytes, total 4 |
---|
672 | */ |
---|
673 | |
---|
674 | if ((rhdr[0] != 'R') || (rhdr[1] != 'A') || (rhdr[2] != 'P') || (rhdr[3] != ',')) |
---|
675 | return false; |
---|
676 | |
---|
677 | sptr = sptr + 4; |
---|
678 | |
---|
679 | /* |
---|
680 | * "00000000," = 9 bytes, total 13 |
---|
681 | */ |
---|
682 | |
---|
683 | *length = strtoul (sptr, &eptr, 10); |
---|
684 | |
---|
685 | if (*eptr != ',') |
---|
686 | return false; |
---|
687 | |
---|
688 | sptr = eptr + 1; |
---|
689 | |
---|
690 | /* |
---|
691 | * "0000," = 5 bytes, total 18 |
---|
692 | */ |
---|
693 | |
---|
694 | *version = strtoul (sptr, &eptr, 10); |
---|
695 | |
---|
696 | if (*eptr != ',') |
---|
697 | return false; |
---|
698 | |
---|
699 | sptr = eptr + 1; |
---|
700 | |
---|
701 | /* |
---|
702 | * "NONE," and "LZ77," = 5 bytes, total 23 |
---|
703 | */ |
---|
704 | |
---|
705 | if ((sptr[0] == 'N') && |
---|
706 | (sptr[1] == 'O') && |
---|
707 | (sptr[2] == 'N') && |
---|
708 | (sptr[3] == 'E')) |
---|
709 | { |
---|
710 | *compression = RTEMS_RTL_COMP_NONE; |
---|
711 | eptr = sptr + 4; |
---|
712 | } |
---|
713 | else if ((sptr[0] == 'L') && |
---|
714 | (sptr[1] == 'Z') && |
---|
715 | (sptr[2] == '7') && |
---|
716 | (sptr[3] == '7')) |
---|
717 | { |
---|
718 | *compression = RTEMS_RTL_COMP_LZ77; |
---|
719 | eptr = sptr + 4; |
---|
720 | } |
---|
721 | else |
---|
722 | return false; |
---|
723 | |
---|
724 | if (*eptr != ',') |
---|
725 | return false; |
---|
726 | |
---|
727 | sptr = eptr + 1; |
---|
728 | |
---|
729 | /* |
---|
730 | * "00000000," = 9 bytes, total 32 |
---|
731 | */ |
---|
732 | *checksum = strtoul (sptr, &eptr, 16); |
---|
733 | |
---|
734 | /* |
---|
735 | * "\n" = 1 byte, total 33 |
---|
736 | */ |
---|
737 | if (*eptr != '\n') |
---|
738 | return false; |
---|
739 | |
---|
740 | *rhdr_len = ((uint8_t*) eptr) - rhdr + 1; |
---|
741 | |
---|
742 | return true; |
---|
743 | } |
---|
744 | |
---|
745 | bool |
---|
746 | rtems_rtl_rap_file_check (rtems_rtl_obj_t* obj, int fd) |
---|
747 | { |
---|
748 | rtems_rtl_obj_cache_t* header; |
---|
749 | uint8_t* rhdr = NULL; |
---|
750 | size_t rlen = 64; |
---|
751 | uint32_t length = 0; |
---|
752 | uint32_t version = 0; |
---|
753 | uint32_t compression = 0; |
---|
754 | uint32_t checksum = 0; |
---|
755 | |
---|
756 | rtems_rtl_obj_caches (&header, NULL, NULL); |
---|
757 | |
---|
758 | if (!rtems_rtl_obj_cache_read (header, fd, obj->ooffset, |
---|
759 | (void**) &rhdr, &rlen)) |
---|
760 | return false; |
---|
761 | |
---|
762 | if (!rtems_rtl_rap_parse_header (rhdr, |
---|
763 | &rlen, |
---|
764 | &length, |
---|
765 | &version, |
---|
766 | &compression, |
---|
767 | &checksum)) |
---|
768 | return false; |
---|
769 | |
---|
770 | return true; |
---|
771 | } |
---|
772 | |
---|
773 | bool |
---|
774 | rtems_rtl_rap_file_load (rtems_rtl_obj_t* obj, int fd) |
---|
775 | { |
---|
776 | rtems_rtl_rap_t rap = { 0 }; |
---|
777 | uint8_t* rhdr = NULL; |
---|
778 | size_t rlen = 64; |
---|
779 | int section; |
---|
780 | |
---|
781 | rtems_rtl_obj_caches (&rap.file, NULL, NULL); |
---|
782 | |
---|
783 | if (!rtems_rtl_obj_cache_read (rap.file, fd, obj->ooffset, |
---|
784 | (void**) &rhdr, &rlen)) |
---|
785 | return false; |
---|
786 | |
---|
787 | if (!rtems_rtl_rap_parse_header (rhdr, |
---|
788 | &rlen, |
---|
789 | &rap.length, |
---|
790 | &rap.version, |
---|
791 | &rap.compression, |
---|
792 | &rap.checksum)) |
---|
793 | { |
---|
794 | rtems_rtl_set_error (EINVAL, "invalid RAP file format"); |
---|
795 | return false; |
---|
796 | } |
---|
797 | |
---|
798 | /* |
---|
799 | * Set up the decompressor. |
---|
800 | */ |
---|
801 | rtems_rtl_obj_comp (&rap.decomp, rap.file, fd, rap.compression, |
---|
802 | rlen + obj->ooffset); |
---|
803 | |
---|
804 | /* |
---|
805 | * uint32_t: machinetype |
---|
806 | * uint32_t: datatype |
---|
807 | * uint32_t: class |
---|
808 | */ |
---|
809 | |
---|
810 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
811 | printf ("rtl: rap: input machine=%lu\n", |
---|
812 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
813 | |
---|
814 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.machinetype)) |
---|
815 | return false; |
---|
816 | |
---|
817 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
818 | printf ("rtl: rap: machinetype=%lu\n", rap.machinetype); |
---|
819 | |
---|
820 | if (!rtems_rtl_rap_machine_check (rap.machinetype)) |
---|
821 | { |
---|
822 | rtems_rtl_set_error (EINVAL, "invalid machinetype"); |
---|
823 | return false; |
---|
824 | } |
---|
825 | |
---|
826 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.datatype)) |
---|
827 | return false; |
---|
828 | |
---|
829 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
830 | printf ("rtl: rap: datatype=%lu\n", rap.datatype); |
---|
831 | |
---|
832 | if (!rtems_rtl_rap_datatype_check (rap.datatype)) |
---|
833 | { |
---|
834 | rtems_rtl_set_error (EINVAL, "invalid datatype"); |
---|
835 | return false; |
---|
836 | } |
---|
837 | |
---|
838 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.class)) |
---|
839 | return false; |
---|
840 | |
---|
841 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
842 | printf ("rtl: rap: class=%lu\n", rap.class); |
---|
843 | |
---|
844 | if (!rtems_rtl_rap_class_check (rap.class)) |
---|
845 | { |
---|
846 | rtems_rtl_set_error (EINVAL, "invalid class"); |
---|
847 | return false; |
---|
848 | } |
---|
849 | |
---|
850 | /* |
---|
851 | * uint32_t: init |
---|
852 | * uint32_t: fini |
---|
853 | * uint32_t: symtab_size |
---|
854 | * uint32_t: strtab_size |
---|
855 | * uint32_t: relocs_size |
---|
856 | */ |
---|
857 | |
---|
858 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
859 | printf ("rtl: rap: input header=%lu\n", |
---|
860 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
861 | |
---|
862 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.init)) |
---|
863 | return false; |
---|
864 | |
---|
865 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.fini)) |
---|
866 | return false; |
---|
867 | |
---|
868 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.symtab_size)) |
---|
869 | return false; |
---|
870 | |
---|
871 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.strtab_size)) |
---|
872 | return false; |
---|
873 | |
---|
874 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.relocs_size)) |
---|
875 | return false; |
---|
876 | |
---|
877 | rap.symbols = rap.symtab_size / (3 * sizeof (uint32_t)); |
---|
878 | |
---|
879 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
880 | printf ("rtl: rap: load: symtab=%lu (%lu) strtab=%lu relocs=%lu\n", |
---|
881 | rap.symtab_size, rap.symbols, |
---|
882 | rap.strtab_size, rap.relocs_size); |
---|
883 | |
---|
884 | /* |
---|
885 | * Load the details |
---|
886 | */ |
---|
887 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &obj->obj_num)) |
---|
888 | return false; |
---|
889 | |
---|
890 | if (obj->obj_num > 0) |
---|
891 | { |
---|
892 | obj->sec_num = (uint32_t*) malloc (sizeof (uint32_t) * obj->obj_num); |
---|
893 | |
---|
894 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.rpathlen)) |
---|
895 | return false; |
---|
896 | |
---|
897 | uint32_t i; |
---|
898 | for (i = 0; i < obj->obj_num; ++i) |
---|
899 | { |
---|
900 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &(obj->sec_num[i]))) |
---|
901 | return false; |
---|
902 | } |
---|
903 | |
---|
904 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.strtable_size)) |
---|
905 | return false; |
---|
906 | |
---|
907 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_DETAIL)) |
---|
908 | printf ("rtl: rap: details: obj_num=%lu\n", obj->obj_num); |
---|
909 | |
---|
910 | if (!rtems_rtl_rap_load_details (&rap, obj)) |
---|
911 | return false; |
---|
912 | } |
---|
913 | |
---|
914 | /* |
---|
915 | * uint32_t: text_size |
---|
916 | * uint32_t: text_alignment |
---|
917 | * uint32_t: const_size |
---|
918 | * uint32_t: const_alignment |
---|
919 | * uint32_t: ctor_size |
---|
920 | * uint32_t: ctor_alignment |
---|
921 | * uint32_t: dtor_size |
---|
922 | * uint32_t: dtor_alignment |
---|
923 | * uint32_t: data_size |
---|
924 | * uint32_t: data_alignment |
---|
925 | * uint32_t: bss_size |
---|
926 | * uint32_t: bss_alignment |
---|
927 | */ |
---|
928 | |
---|
929 | for (section = 0; section < RTEMS_RTL_RAP_SECS; ++section) |
---|
930 | { |
---|
931 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.secs[section].size)) |
---|
932 | return false; |
---|
933 | |
---|
934 | if (!rtems_rtl_rap_read_uint32 (rap.decomp, &rap.secs[section].alignment)) |
---|
935 | return false; |
---|
936 | |
---|
937 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD_SECT)) |
---|
938 | printf ("rtl: rap: %s: size=%lu align=%lu\n", |
---|
939 | rap_sections[section].name, |
---|
940 | rap.secs[section].size, |
---|
941 | rap.secs[section].alignment); |
---|
942 | |
---|
943 | if (!rtems_rtl_obj_add_section (obj, |
---|
944 | section, |
---|
945 | rap_sections[section].name, |
---|
946 | rap.secs[section].size, |
---|
947 | 0, |
---|
948 | rap.secs[section].alignment, |
---|
949 | 0, 0, |
---|
950 | rap_sections[section].flags)) |
---|
951 | return false; |
---|
952 | } |
---|
953 | |
---|
954 | /** obj->entry = (void*)(uintptr_t) ehdr.e_entry; */ |
---|
955 | |
---|
956 | if (!rtems_rtl_obj_load_sections (obj, fd, rtems_rtl_rap_loader, &rap)) |
---|
957 | return false; |
---|
958 | |
---|
959 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
960 | printf ("rtl: rap: input symbols=%lu\n", |
---|
961 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
962 | |
---|
963 | if (!rtems_rtl_rap_load_symbols (&rap, obj)) |
---|
964 | return false; |
---|
965 | |
---|
966 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
---|
967 | printf ("rtl: rap: input relocs=%lu\n", |
---|
968 | rtems_rtl_obj_comp_input (rap.decomp)); |
---|
969 | |
---|
970 | if (!rtems_rtl_rap_relocate (&rap, obj)) |
---|
971 | return false; |
---|
972 | |
---|
973 | rtems_rtl_obj_synchronize_cache (obj); |
---|
974 | |
---|
975 | return true; |
---|
976 | } |
---|
977 | |
---|
978 | rtems_rtl_loader_format_t* |
---|
979 | rtems_rtl_rap_file_sig (void) |
---|
980 | { |
---|
981 | return &rap_sig; |
---|
982 | } |
---|