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310df056 WL |
1 | /* |
2 | * ELF loading code | |
3 | * | |
4 | * Copyright (c) 2013 Stacey D. Son | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program 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 | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
84778508 | 19 | |
2231197c | 20 | #include "qemu/osdep.h" |
84778508 BS |
21 | |
22 | #include "qemu.h" | |
76cad711 | 23 | #include "disas/disas.h" |
f348b6d1 | 24 | #include "qemu/path.h" |
84778508 | 25 | |
e58ffeb3 | 26 | #ifdef _ARCH_PPC64 |
84778508 BS |
27 | #undef ARCH_DLINFO |
28 | #undef ELF_PLATFORM | |
29 | #undef ELF_HWCAP | |
30 | #undef ELF_CLASS | |
31 | #undef ELF_DATA | |
32 | #undef ELF_ARCH | |
33 | #endif | |
34 | ||
35 | /* from personality.h */ | |
36 | ||
37 | /* | |
38 | * Flags for bug emulation. | |
39 | * | |
40 | * These occupy the top three bytes. | |
41 | */ | |
42 | enum { | |
43 | ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ | |
44 | FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors | |
45 | * (signal handling) | |
46 | */ | |
47 | MMAP_PAGE_ZERO = 0x0100000, | |
48 | ADDR_COMPAT_LAYOUT = 0x0200000, | |
49 | READ_IMPLIES_EXEC = 0x0400000, | |
50 | ADDR_LIMIT_32BIT = 0x0800000, | |
51 | SHORT_INODE = 0x1000000, | |
52 | WHOLE_SECONDS = 0x2000000, | |
53 | STICKY_TIMEOUTS = 0x4000000, | |
54 | ADDR_LIMIT_3GB = 0x8000000, | |
55 | }; | |
56 | ||
57 | /* | |
58 | * Personality types. | |
59 | * | |
60 | * These go in the low byte. Avoid using the top bit, it will | |
61 | * conflict with error returns. | |
62 | */ | |
63 | enum { | |
64 | PER_LINUX = 0x0000, | |
65 | PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, | |
66 | PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, | |
67 | PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
68 | PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, | |
69 | PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | | |
70 | WHOLE_SECONDS | SHORT_INODE, | |
71 | PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, | |
72 | PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, | |
73 | PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, | |
74 | PER_BSD = 0x0006, | |
75 | PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, | |
76 | PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, | |
77 | PER_LINUX32 = 0x0008, | |
78 | PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, | |
79 | PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ | |
80 | PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ | |
81 | PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ | |
82 | PER_RISCOS = 0x000c, | |
83 | PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, | |
84 | PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
85 | PER_OSF4 = 0x000f, /* OSF/1 v4 */ | |
86 | PER_HPUX = 0x0010, | |
87 | PER_MASK = 0x00ff, | |
88 | }; | |
89 | ||
90 | /* | |
91 | * Return the base personality without flags. | |
92 | */ | |
93 | #define personality(pers) (pers & PER_MASK) | |
94 | ||
95 | /* this flag is uneffective under linux too, should be deleted */ | |
96 | #ifndef MAP_DENYWRITE | |
97 | #define MAP_DENYWRITE 0 | |
98 | #endif | |
99 | ||
100 | /* should probably go in elf.h */ | |
101 | #ifndef ELIBBAD | |
102 | #define ELIBBAD 80 | |
103 | #endif | |
104 | ||
105 | #ifdef TARGET_I386 | |
106 | ||
107 | #define ELF_PLATFORM get_elf_platform() | |
108 | ||
109 | static const char *get_elf_platform(void) | |
110 | { | |
111 | static char elf_platform[] = "i386"; | |
dca1173c | 112 | int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL); |
84778508 BS |
113 | if (family > 6) |
114 | family = 6; | |
115 | if (family >= 3) | |
116 | elf_platform[1] = '0' + family; | |
117 | return elf_platform; | |
118 | } | |
119 | ||
120 | #define ELF_HWCAP get_elf_hwcap() | |
121 | ||
122 | static uint32_t get_elf_hwcap(void) | |
123 | { | |
dca1173c AF |
124 | X86CPU *cpu = X86_CPU(thread_cpu); |
125 | ||
126 | return cpu->env.features[FEAT_1_EDX]; | |
84778508 BS |
127 | } |
128 | ||
129 | #ifdef TARGET_X86_64 | |
130 | #define ELF_START_MMAP 0x2aaaaab000ULL | |
b4bebeee | 131 | #define elf_check_arch(x) (((x) == ELF_ARCH)) |
84778508 BS |
132 | |
133 | #define ELF_CLASS ELFCLASS64 | |
134 | #define ELF_DATA ELFDATA2LSB | |
135 | #define ELF_ARCH EM_X86_64 | |
136 | ||
137 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
138 | { | |
139 | regs->rax = 0; | |
140 | regs->rsp = infop->start_stack; | |
141 | regs->rip = infop->entry; | |
78cfb07f JL |
142 | if (bsd_type == target_freebsd) { |
143 | regs->rdi = infop->start_stack; | |
144 | } | |
84778508 BS |
145 | } |
146 | ||
147 | #else | |
148 | ||
149 | #define ELF_START_MMAP 0x80000000 | |
150 | ||
151 | /* | |
152 | * This is used to ensure we don't load something for the wrong architecture. | |
153 | */ | |
b4bebeee | 154 | #define elf_check_arch(x) (((x) == EM_386) || ((x) == EM_486)) |
84778508 BS |
155 | |
156 | /* | |
157 | * These are used to set parameters in the core dumps. | |
158 | */ | |
159 | #define ELF_CLASS ELFCLASS32 | |
160 | #define ELF_DATA ELFDATA2LSB | |
161 | #define ELF_ARCH EM_386 | |
162 | ||
163 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
164 | { | |
165 | regs->esp = infop->start_stack; | |
166 | regs->eip = infop->entry; | |
167 | ||
168 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
169 | starts %edx contains a pointer to a function which might be | |
170 | registered using `atexit'. This provides a mean for the | |
171 | dynamic linker to call DT_FINI functions for shared libraries | |
172 | that have been loaded before the code runs. | |
173 | ||
174 | A value of 0 tells we have no such handler. */ | |
175 | regs->edx = 0; | |
176 | } | |
177 | #endif | |
178 | ||
179 | #define USE_ELF_CORE_DUMP | |
180 | #define ELF_EXEC_PAGESIZE 4096 | |
181 | ||
182 | #endif | |
183 | ||
184 | #ifdef TARGET_ARM | |
185 | ||
186 | #define ELF_START_MMAP 0x80000000 | |
187 | ||
b4bebeee | 188 | #define elf_check_arch(x) ((x) == EM_ARM) |
84778508 BS |
189 | |
190 | #define ELF_CLASS ELFCLASS32 | |
191 | #ifdef TARGET_WORDS_BIGENDIAN | |
192 | #define ELF_DATA ELFDATA2MSB | |
193 | #else | |
194 | #define ELF_DATA ELFDATA2LSB | |
195 | #endif | |
196 | #define ELF_ARCH EM_ARM | |
197 | ||
198 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
199 | { | |
200 | abi_long stack = infop->start_stack; | |
201 | memset(regs, 0, sizeof(*regs)); | |
202 | regs->ARM_cpsr = 0x10; | |
203 | if (infop->entry & 1) | |
b4bebeee | 204 | regs->ARM_cpsr |= CPSR_T; |
84778508 BS |
205 | regs->ARM_pc = infop->entry & 0xfffffffe; |
206 | regs->ARM_sp = infop->start_stack; | |
207 | /* FIXME - what to for failure of get_user()? */ | |
208 | get_user_ual(regs->ARM_r2, stack + 8); /* envp */ | |
209 | get_user_ual(regs->ARM_r1, stack + 4); /* envp */ | |
210 | /* XXX: it seems that r0 is zeroed after ! */ | |
211 | regs->ARM_r0 = 0; | |
212 | /* For uClinux PIC binaries. */ | |
213 | /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ | |
214 | regs->ARM_r10 = infop->start_data; | |
215 | } | |
216 | ||
217 | #define USE_ELF_CORE_DUMP | |
218 | #define ELF_EXEC_PAGESIZE 4096 | |
219 | ||
220 | enum | |
221 | { | |
222 | ARM_HWCAP_ARM_SWP = 1 << 0, | |
223 | ARM_HWCAP_ARM_HALF = 1 << 1, | |
224 | ARM_HWCAP_ARM_THUMB = 1 << 2, | |
225 | ARM_HWCAP_ARM_26BIT = 1 << 3, | |
226 | ARM_HWCAP_ARM_FAST_MULT = 1 << 4, | |
227 | ARM_HWCAP_ARM_FPA = 1 << 5, | |
228 | ARM_HWCAP_ARM_VFP = 1 << 6, | |
229 | ARM_HWCAP_ARM_EDSP = 1 << 7, | |
230 | }; | |
231 | ||
232 | #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \ | |
233 | | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ | |
234 | | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP) | |
235 | ||
236 | #endif | |
237 | ||
238 | #ifdef TARGET_SPARC | |
239 | #ifdef TARGET_SPARC64 | |
240 | ||
241 | #define ELF_START_MMAP 0x80000000 | |
242 | ||
243 | #ifndef TARGET_ABI32 | |
b4bebeee | 244 | #define elf_check_arch(x) ((x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS) |
84778508 | 245 | #else |
b4bebeee | 246 | #define elf_check_arch(x) ((x) == EM_SPARC32PLUS || (x) == EM_SPARC) |
84778508 BS |
247 | #endif |
248 | ||
249 | #define ELF_CLASS ELFCLASS64 | |
250 | #define ELF_DATA ELFDATA2MSB | |
251 | #define ELF_ARCH EM_SPARCV9 | |
252 | ||
253 | #define STACK_BIAS 2047 | |
254 | ||
255 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
256 | { | |
257 | #ifndef TARGET_ABI32 | |
258 | regs->tstate = 0; | |
259 | #endif | |
260 | regs->pc = infop->entry; | |
261 | regs->npc = regs->pc + 4; | |
262 | regs->y = 0; | |
263 | #ifdef TARGET_ABI32 | |
264 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
265 | #else | |
266 | if (personality(infop->personality) == PER_LINUX32) | |
267 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
78cfb07f | 268 | else { |
84778508 | 269 | regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; |
78cfb07f JL |
270 | if (bsd_type == target_freebsd) { |
271 | regs->u_regs[8] = infop->start_stack; | |
272 | regs->u_regs[11] = infop->start_stack; | |
273 | } | |
274 | } | |
84778508 BS |
275 | #endif |
276 | } | |
277 | ||
278 | #else | |
279 | #define ELF_START_MMAP 0x80000000 | |
280 | ||
b4bebeee | 281 | #define elf_check_arch(x) ((x) == EM_SPARC) |
84778508 BS |
282 | |
283 | #define ELF_CLASS ELFCLASS32 | |
284 | #define ELF_DATA ELFDATA2MSB | |
285 | #define ELF_ARCH EM_SPARC | |
286 | ||
287 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
288 | { | |
289 | regs->psr = 0; | |
290 | regs->pc = infop->entry; | |
291 | regs->npc = regs->pc + 4; | |
292 | regs->y = 0; | |
293 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
294 | } | |
295 | ||
296 | #endif | |
297 | #endif | |
298 | ||
299 | #ifdef TARGET_PPC | |
300 | ||
301 | #define ELF_START_MMAP 0x80000000 | |
302 | ||
303 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) | |
304 | ||
b4bebeee | 305 | #define elf_check_arch(x) ((x) == EM_PPC64) |
84778508 BS |
306 | |
307 | #define ELF_CLASS ELFCLASS64 | |
308 | ||
309 | #else | |
310 | ||
b4bebeee | 311 | #define elf_check_arch(x) ((x) == EM_PPC) |
84778508 BS |
312 | |
313 | #define ELF_CLASS ELFCLASS32 | |
314 | ||
315 | #endif | |
316 | ||
317 | #ifdef TARGET_WORDS_BIGENDIAN | |
318 | #define ELF_DATA ELFDATA2MSB | |
319 | #else | |
320 | #define ELF_DATA ELFDATA2LSB | |
321 | #endif | |
322 | #define ELF_ARCH EM_PPC | |
323 | ||
324 | /* | |
325 | * We need to put in some extra aux table entries to tell glibc what | |
326 | * the cache block size is, so it can use the dcbz instruction safely. | |
327 | */ | |
328 | #define AT_DCACHEBSIZE 19 | |
329 | #define AT_ICACHEBSIZE 20 | |
330 | #define AT_UCACHEBSIZE 21 | |
331 | /* A special ignored type value for PPC, for glibc compatibility. */ | |
332 | #define AT_IGNOREPPC 22 | |
333 | /* | |
334 | * The requirements here are: | |
335 | * - keep the final alignment of sp (sp & 0xf) | |
336 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
337 | * AUXV is greater than 16 for glibc compatibility. | |
338 | * AT_IGNOREPPC is used for that. | |
339 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
340 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
341 | */ | |
342 | #define DLINFO_ARCH_ITEMS 5 | |
343 | #define ARCH_DLINFO \ | |
344 | do { \ | |
345 | NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \ | |
346 | NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \ | |
347 | NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ | |
348 | /* \ | |
349 | * Now handle glibc compatibility. \ | |
350 | */ \ | |
351 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
352 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
353 | } while (0) | |
354 | ||
355 | static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) | |
356 | { | |
357 | abi_ulong pos = infop->start_stack; | |
358 | abi_ulong tmp; | |
359 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) | |
360 | abi_ulong entry, toc; | |
361 | #endif | |
362 | ||
363 | _regs->gpr[1] = infop->start_stack; | |
364 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) | |
b8d6ac9f PM |
365 | get_user_u64(entry, infop->entry); |
366 | entry += infop->load_addr; | |
367 | get_user_u64(toc, infop->entry + 8); | |
368 | toc += infop->load_addr; | |
84778508 BS |
369 | _regs->gpr[2] = toc; |
370 | infop->entry = entry; | |
371 | #endif | |
372 | _regs->nip = infop->entry; | |
373 | /* Note that isn't exactly what regular kernel does | |
374 | * but this is what the ABI wants and is needed to allow | |
375 | * execution of PPC BSD programs. | |
376 | */ | |
377 | /* FIXME - what to for failure of get_user()? */ | |
378 | get_user_ual(_regs->gpr[3], pos); | |
379 | pos += sizeof(abi_ulong); | |
380 | _regs->gpr[4] = pos; | |
b8d6ac9f PM |
381 | for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong)) { |
382 | get_user_ual(tmp, pos); | |
383 | } | |
84778508 BS |
384 | _regs->gpr[5] = pos; |
385 | } | |
386 | ||
387 | #define USE_ELF_CORE_DUMP | |
388 | #define ELF_EXEC_PAGESIZE 4096 | |
389 | ||
390 | #endif | |
391 | ||
392 | #ifdef TARGET_MIPS | |
393 | ||
394 | #define ELF_START_MMAP 0x80000000 | |
395 | ||
b4bebeee | 396 | #define elf_check_arch(x) ((x) == EM_MIPS) |
84778508 BS |
397 | |
398 | #ifdef TARGET_MIPS64 | |
399 | #define ELF_CLASS ELFCLASS64 | |
400 | #else | |
401 | #define ELF_CLASS ELFCLASS32 | |
402 | #endif | |
403 | #ifdef TARGET_WORDS_BIGENDIAN | |
404 | #define ELF_DATA ELFDATA2MSB | |
405 | #else | |
406 | #define ELF_DATA ELFDATA2LSB | |
407 | #endif | |
408 | #define ELF_ARCH EM_MIPS | |
409 | ||
410 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
411 | { | |
412 | regs->cp0_status = 2 << CP0St_KSU; | |
413 | regs->cp0_epc = infop->entry; | |
414 | regs->regs[29] = infop->start_stack; | |
415 | } | |
416 | ||
417 | #define USE_ELF_CORE_DUMP | |
418 | #define ELF_EXEC_PAGESIZE 4096 | |
419 | ||
420 | #endif /* TARGET_MIPS */ | |
421 | ||
422 | #ifdef TARGET_SH4 | |
423 | ||
424 | #define ELF_START_MMAP 0x80000000 | |
425 | ||
b4bebeee | 426 | #define elf_check_arch(x) ((x) == EM_SH) |
84778508 BS |
427 | |
428 | #define ELF_CLASS ELFCLASS32 | |
429 | #define ELF_DATA ELFDATA2LSB | |
430 | #define ELF_ARCH EM_SH | |
431 | ||
432 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
433 | { | |
434 | /* Check other registers XXXXX */ | |
435 | regs->pc = infop->entry; | |
436 | regs->regs[15] = infop->start_stack; | |
437 | } | |
438 | ||
439 | #define USE_ELF_CORE_DUMP | |
440 | #define ELF_EXEC_PAGESIZE 4096 | |
441 | ||
442 | #endif | |
443 | ||
444 | #ifdef TARGET_CRIS | |
445 | ||
446 | #define ELF_START_MMAP 0x80000000 | |
447 | ||
b4bebeee | 448 | #define elf_check_arch(x) ((x) == EM_CRIS) |
84778508 BS |
449 | |
450 | #define ELF_CLASS ELFCLASS32 | |
451 | #define ELF_DATA ELFDATA2LSB | |
452 | #define ELF_ARCH EM_CRIS | |
453 | ||
454 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
455 | { | |
456 | regs->erp = infop->entry; | |
457 | } | |
458 | ||
459 | #define USE_ELF_CORE_DUMP | |
460 | #define ELF_EXEC_PAGESIZE 8192 | |
461 | ||
462 | #endif | |
463 | ||
464 | #ifdef TARGET_M68K | |
465 | ||
466 | #define ELF_START_MMAP 0x80000000 | |
467 | ||
b4bebeee | 468 | #define elf_check_arch(x) ((x) == EM_68K) |
84778508 BS |
469 | |
470 | #define ELF_CLASS ELFCLASS32 | |
471 | #define ELF_DATA ELFDATA2MSB | |
472 | #define ELF_ARCH EM_68K | |
473 | ||
474 | /* ??? Does this need to do anything? | |
475 | #define ELF_PLAT_INIT(_r) */ | |
476 | ||
477 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
478 | { | |
479 | regs->usp = infop->start_stack; | |
480 | regs->sr = 0; | |
481 | regs->pc = infop->entry; | |
482 | } | |
483 | ||
484 | #define USE_ELF_CORE_DUMP | |
485 | #define ELF_EXEC_PAGESIZE 8192 | |
486 | ||
487 | #endif | |
488 | ||
489 | #ifdef TARGET_ALPHA | |
490 | ||
491 | #define ELF_START_MMAP (0x30000000000ULL) | |
492 | ||
b4bebeee | 493 | #define elf_check_arch(x) ((x) == ELF_ARCH) |
84778508 BS |
494 | |
495 | #define ELF_CLASS ELFCLASS64 | |
496 | #define ELF_DATA ELFDATA2MSB | |
497 | #define ELF_ARCH EM_ALPHA | |
498 | ||
499 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
500 | { | |
501 | regs->pc = infop->entry; | |
502 | regs->ps = 8; | |
503 | regs->usp = infop->start_stack; | |
504 | regs->unique = infop->start_data; /* ? */ | |
505 | printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", | |
506 | regs->unique, infop->start_data); | |
507 | } | |
508 | ||
509 | #define USE_ELF_CORE_DUMP | |
510 | #define ELF_EXEC_PAGESIZE 8192 | |
511 | ||
512 | #endif /* TARGET_ALPHA */ | |
513 | ||
514 | #ifndef ELF_PLATFORM | |
515 | #define ELF_PLATFORM (NULL) | |
516 | #endif | |
517 | ||
518 | #ifndef ELF_HWCAP | |
519 | #define ELF_HWCAP 0 | |
520 | #endif | |
521 | ||
522 | #ifdef TARGET_ABI32 | |
523 | #undef ELF_CLASS | |
524 | #define ELF_CLASS ELFCLASS32 | |
525 | #undef bswaptls | |
526 | #define bswaptls(ptr) bswap32s(ptr) | |
527 | #endif | |
528 | ||
529 | #include "elf.h" | |
530 | ||
531 | struct exec | |
532 | { | |
533 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ | |
534 | unsigned int a_text; /* length of text, in bytes */ | |
535 | unsigned int a_data; /* length of data, in bytes */ | |
536 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
537 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
538 | unsigned int a_entry; /* start address */ | |
539 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
540 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
541 | }; | |
542 | ||
543 | ||
544 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
545 | #define OMAGIC 0407 | |
546 | #define NMAGIC 0410 | |
547 | #define ZMAGIC 0413 | |
548 | #define QMAGIC 0314 | |
549 | ||
550 | /* max code+data+bss space allocated to elf interpreter */ | |
551 | #define INTERP_MAP_SIZE (32 * 1024 * 1024) | |
552 | ||
553 | /* max code+data+bss+brk space allocated to ET_DYN executables */ | |
554 | #define ET_DYN_MAP_SIZE (128 * 1024 * 1024) | |
555 | ||
556 | /* Necessary parameters */ | |
557 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE | |
b4bebeee WL |
558 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE - 1)) |
559 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE - 1)) | |
84778508 BS |
560 | |
561 | #define INTERPRETER_NONE 0 | |
562 | #define INTERPRETER_AOUT 1 | |
563 | #define INTERPRETER_ELF 2 | |
564 | ||
565 | #define DLINFO_ITEMS 12 | |
566 | ||
b4bebeee | 567 | static inline void memcpy_fromfs(void *to, const void *from, unsigned long n) |
84778508 BS |
568 | { |
569 | memcpy(to, from, n); | |
570 | } | |
571 | ||
b4bebeee | 572 | static int load_aout_interp(void *exptr, int interp_fd); |
84778508 BS |
573 | |
574 | #ifdef BSWAP_NEEDED | |
575 | static void bswap_ehdr(struct elfhdr *ehdr) | |
576 | { | |
577 | bswap16s(&ehdr->e_type); /* Object file type */ | |
578 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
579 | bswap32s(&ehdr->e_version); /* Object file version */ | |
580 | bswaptls(&ehdr->e_entry); /* Entry point virtual address */ | |
581 | bswaptls(&ehdr->e_phoff); /* Program header table file offset */ | |
582 | bswaptls(&ehdr->e_shoff); /* Section header table file offset */ | |
583 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ | |
584 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
585 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
586 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
587 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
588 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
589 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
590 | } | |
591 | ||
592 | static void bswap_phdr(struct elf_phdr *phdr) | |
593 | { | |
594 | bswap32s(&phdr->p_type); /* Segment type */ | |
595 | bswaptls(&phdr->p_offset); /* Segment file offset */ | |
596 | bswaptls(&phdr->p_vaddr); /* Segment virtual address */ | |
597 | bswaptls(&phdr->p_paddr); /* Segment physical address */ | |
598 | bswaptls(&phdr->p_filesz); /* Segment size in file */ | |
599 | bswaptls(&phdr->p_memsz); /* Segment size in memory */ | |
600 | bswap32s(&phdr->p_flags); /* Segment flags */ | |
601 | bswaptls(&phdr->p_align); /* Segment alignment */ | |
602 | } | |
603 | ||
604 | static void bswap_shdr(struct elf_shdr *shdr) | |
605 | { | |
606 | bswap32s(&shdr->sh_name); | |
607 | bswap32s(&shdr->sh_type); | |
608 | bswaptls(&shdr->sh_flags); | |
609 | bswaptls(&shdr->sh_addr); | |
610 | bswaptls(&shdr->sh_offset); | |
611 | bswaptls(&shdr->sh_size); | |
612 | bswap32s(&shdr->sh_link); | |
613 | bswap32s(&shdr->sh_info); | |
614 | bswaptls(&shdr->sh_addralign); | |
615 | bswaptls(&shdr->sh_entsize); | |
616 | } | |
617 | ||
618 | static void bswap_sym(struct elf_sym *sym) | |
619 | { | |
620 | bswap32s(&sym->st_name); | |
621 | bswaptls(&sym->st_value); | |
622 | bswaptls(&sym->st_size); | |
623 | bswap16s(&sym->st_shndx); | |
624 | } | |
625 | #endif | |
626 | ||
627 | /* | |
628 | * 'copy_elf_strings()' copies argument/envelope strings from user | |
629 | * memory to free pages in kernel mem. These are in a format ready | |
630 | * to be put directly into the top of new user memory. | |
631 | * | |
632 | */ | |
b4bebeee | 633 | static abi_ulong copy_elf_strings(int argc, char **argv, void **page, |
84778508 BS |
634 | abi_ulong p) |
635 | { | |
636 | char *tmp, *tmp1, *pag = NULL; | |
637 | int len, offset = 0; | |
638 | ||
639 | if (!p) { | |
640 | return 0; /* bullet-proofing */ | |
641 | } | |
642 | while (argc-- > 0) { | |
643 | tmp = argv[argc]; | |
644 | if (!tmp) { | |
9bb93180 | 645 | fprintf(stderr, "VFS: argc is wrong"); |
84778508 BS |
646 | exit(-1); |
647 | } | |
648 | tmp1 = tmp; | |
649 | while (*tmp++); | |
650 | len = tmp - tmp1; | |
651 | if (p < len) { /* this shouldn't happen - 128kB */ | |
652 | return 0; | |
653 | } | |
654 | while (len) { | |
655 | --p; --tmp; --len; | |
656 | if (--offset < 0) { | |
657 | offset = p % TARGET_PAGE_SIZE; | |
b4bebeee | 658 | pag = (char *)page[p / TARGET_PAGE_SIZE]; |
84778508 | 659 | if (!pag) { |
c580dee4 | 660 | pag = g_try_malloc0(TARGET_PAGE_SIZE); |
b4bebeee | 661 | page[p / TARGET_PAGE_SIZE] = pag; |
84778508 BS |
662 | if (!pag) |
663 | return 0; | |
664 | } | |
665 | } | |
666 | if (len == 0 || offset == 0) { | |
667 | *(pag + offset) = *tmp; | |
668 | } | |
669 | else { | |
670 | int bytes_to_copy = (len > offset) ? offset : len; | |
671 | tmp -= bytes_to_copy; | |
672 | p -= bytes_to_copy; | |
673 | offset -= bytes_to_copy; | |
674 | len -= bytes_to_copy; | |
675 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
676 | } | |
677 | } | |
678 | } | |
679 | return p; | |
680 | } | |
681 | ||
afcbcff8 | 682 | static abi_ulong setup_arg_pages(abi_ulong p, struct bsd_binprm *bprm, |
84778508 BS |
683 | struct image_info *info) |
684 | { | |
685 | abi_ulong stack_base, size, error; | |
686 | int i; | |
687 | ||
688 | /* Create enough stack to hold everything. If we don't use | |
689 | * it for args, we'll use it for something else... | |
690 | */ | |
691 | size = x86_stack_size; | |
b4bebeee WL |
692 | if (size < MAX_ARG_PAGES * TARGET_PAGE_SIZE) |
693 | size = MAX_ARG_PAGES * TARGET_PAGE_SIZE; | |
84778508 BS |
694 | error = target_mmap(0, |
695 | size + qemu_host_page_size, | |
696 | PROT_READ | PROT_WRITE, | |
697 | MAP_PRIVATE | MAP_ANON, | |
698 | -1, 0); | |
699 | if (error == -1) { | |
700 | perror("stk mmap"); | |
701 | exit(-1); | |
702 | } | |
703 | /* we reserve one extra page at the top of the stack as guard */ | |
704 | target_mprotect(error + size, qemu_host_page_size, PROT_NONE); | |
705 | ||
b4bebeee | 706 | stack_base = error + size - MAX_ARG_PAGES * TARGET_PAGE_SIZE; |
84778508 BS |
707 | p += stack_base; |
708 | ||
709 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
710 | if (bprm->page[i]) { | |
711 | info->rss++; | |
712 | /* FIXME - check return value of memcpy_to_target() for failure */ | |
713 | memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); | |
c580dee4 | 714 | g_free(bprm->page[i]); |
84778508 BS |
715 | } |
716 | stack_base += TARGET_PAGE_SIZE; | |
717 | } | |
718 | return p; | |
719 | } | |
720 | ||
721 | static void set_brk(abi_ulong start, abi_ulong end) | |
722 | { | |
723 | /* page-align the start and end addresses... */ | |
724 | start = HOST_PAGE_ALIGN(start); | |
725 | end = HOST_PAGE_ALIGN(end); | |
726 | if (end <= start) | |
727 | return; | |
b4bebeee | 728 | if (target_mmap(start, end - start, |
84778508 BS |
729 | PROT_READ | PROT_WRITE | PROT_EXEC, |
730 | MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0) == -1) { | |
731 | perror("cannot mmap brk"); | |
732 | exit(-1); | |
733 | } | |
734 | } | |
735 | ||
736 | ||
737 | /* We need to explicitly zero any fractional pages after the data | |
738 | section (i.e. bss). This would contain the junk from the file that | |
739 | should not be in memory. */ | |
740 | static void padzero(abi_ulong elf_bss, abi_ulong last_bss) | |
741 | { | |
742 | abi_ulong nbyte; | |
743 | ||
744 | if (elf_bss >= last_bss) | |
745 | return; | |
746 | ||
747 | /* XXX: this is really a hack : if the real host page size is | |
748 | smaller than the target page size, some pages after the end | |
749 | of the file may not be mapped. A better fix would be to | |
750 | patch target_mmap(), but it is more complicated as the file | |
751 | size must be known */ | |
752 | if (qemu_real_host_page_size < qemu_host_page_size) { | |
753 | abi_ulong end_addr, end_addr1; | |
0c2d70c4 | 754 | end_addr1 = REAL_HOST_PAGE_ALIGN(elf_bss); |
84778508 BS |
755 | end_addr = HOST_PAGE_ALIGN(elf_bss); |
756 | if (end_addr1 < end_addr) { | |
3e8f1628 | 757 | mmap((void *)g2h_untagged(end_addr1), end_addr - end_addr1, |
b4bebeee WL |
758 | PROT_READ | PROT_WRITE | PROT_EXEC, |
759 | MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0); | |
84778508 BS |
760 | } |
761 | } | |
762 | ||
b4bebeee | 763 | nbyte = elf_bss & (qemu_host_page_size - 1); |
84778508 BS |
764 | if (nbyte) { |
765 | nbyte = qemu_host_page_size - nbyte; | |
766 | do { | |
767 | /* FIXME - what to do if put_user() fails? */ | |
768 | put_user_u8(0, elf_bss); | |
769 | elf_bss++; | |
770 | } while (--nbyte); | |
771 | } | |
772 | } | |
773 | ||
774 | ||
775 | static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, | |
776 | struct elfhdr * exec, | |
777 | abi_ulong load_addr, | |
778 | abi_ulong load_bias, | |
779 | abi_ulong interp_load_addr, int ibcs, | |
780 | struct image_info *info) | |
781 | { | |
782 | abi_ulong sp; | |
783 | int size; | |
784 | abi_ulong u_platform; | |
785 | const char *k_platform; | |
786 | const int n = sizeof(elf_addr_t); | |
787 | ||
788 | sp = p; | |
789 | u_platform = 0; | |
790 | k_platform = ELF_PLATFORM; | |
791 | if (k_platform) { | |
792 | size_t len = strlen(k_platform) + 1; | |
793 | sp -= (len + n - 1) & ~(n - 1); | |
794 | u_platform = sp; | |
795 | /* FIXME - check return value of memcpy_to_target() for failure */ | |
796 | memcpy_to_target(sp, k_platform, len); | |
797 | } | |
798 | /* | |
799 | * Force 16 byte _final_ alignment here for generality. | |
800 | */ | |
b4bebeee | 801 | sp = sp & ~(abi_ulong)15; |
84778508 BS |
802 | size = (DLINFO_ITEMS + 1) * 2; |
803 | if (k_platform) | |
b4bebeee | 804 | size += 2; |
84778508 BS |
805 | #ifdef DLINFO_ARCH_ITEMS |
806 | size += DLINFO_ARCH_ITEMS * 2; | |
807 | #endif | |
808 | size += envc + argc + 2; | |
809 | size += (!ibcs ? 3 : 1); /* argc itself */ | |
810 | size *= n; | |
811 | if (size & 15) | |
b4bebeee | 812 | sp -= 16 - (size & 15); |
84778508 BS |
813 | |
814 | /* This is correct because Linux defines | |
815 | * elf_addr_t as Elf32_Off / Elf64_Off | |
816 | */ | |
817 | #define NEW_AUX_ENT(id, val) do { \ | |
818 | sp -= n; put_user_ual(val, sp); \ | |
819 | sp -= n; put_user_ual(id, sp); \ | |
b4bebeee | 820 | } while (0) |
84778508 | 821 | |
b4bebeee | 822 | NEW_AUX_ENT(AT_NULL, 0); |
84778508 BS |
823 | |
824 | /* There must be exactly DLINFO_ITEMS entries here. */ | |
825 | NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); | |
b4bebeee | 826 | NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof(struct elf_phdr))); |
84778508 BS |
827 | NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); |
828 | NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); | |
829 | NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); | |
830 | NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); | |
831 | NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); | |
832 | NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); | |
833 | NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); | |
834 | NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); | |
835 | NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); | |
836 | NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); | |
837 | NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); | |
838 | if (k_platform) | |
839 | NEW_AUX_ENT(AT_PLATFORM, u_platform); | |
840 | #ifdef ARCH_DLINFO | |
841 | /* | |
842 | * ARCH_DLINFO must come last so platform specific code can enforce | |
843 | * special alignment requirements on the AUXV if necessary (eg. PPC). | |
844 | */ | |
845 | ARCH_DLINFO; | |
846 | #endif | |
847 | #undef NEW_AUX_ENT | |
848 | ||
849 | sp = loader_build_argptr(envc, argc, sp, p, !ibcs); | |
850 | return sp; | |
851 | } | |
852 | ||
853 | ||
b4bebeee | 854 | static abi_ulong load_elf_interp(struct elfhdr *interp_elf_ex, |
84778508 BS |
855 | int interpreter_fd, |
856 | abi_ulong *interp_load_addr) | |
857 | { | |
b4bebeee WL |
858 | struct elf_phdr *elf_phdata = NULL; |
859 | struct elf_phdr *eppnt; | |
860 | abi_ulong load_addr = 0; | |
861 | int load_addr_set = 0; | |
862 | int retval; | |
863 | abi_ulong last_bss, elf_bss; | |
864 | abi_ulong error; | |
865 | int i; | |
84778508 | 866 | |
b4bebeee WL |
867 | elf_bss = 0; |
868 | last_bss = 0; | |
869 | error = 0; | |
84778508 BS |
870 | |
871 | #ifdef BSWAP_NEEDED | |
b4bebeee | 872 | bswap_ehdr(interp_elf_ex); |
84778508 | 873 | #endif |
b4bebeee WL |
874 | /* First of all, some simple consistency checks */ |
875 | if ((interp_elf_ex->e_type != ET_EXEC && | |
876 | interp_elf_ex->e_type != ET_DYN) || | |
877 | !elf_check_arch(interp_elf_ex->e_machine)) { | |
878 | return ~((abi_ulong)0UL); | |
879 | } | |
84778508 BS |
880 | |
881 | ||
b4bebeee | 882 | /* Now read in all of the header information */ |
84778508 | 883 | |
b4bebeee WL |
884 | if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
885 | return ~(abi_ulong)0UL; | |
84778508 | 886 | |
b4bebeee WL |
887 | elf_phdata = (struct elf_phdr *) |
888 | malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
84778508 | 889 | |
b4bebeee WL |
890 | if (!elf_phdata) |
891 | return ~((abi_ulong)0UL); | |
84778508 | 892 | |
b4bebeee WL |
893 | /* |
894 | * If the size of this structure has changed, then punt, since | |
895 | * we will be doing the wrong thing. | |
896 | */ | |
897 | if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { | |
898 | free(elf_phdata); | |
899 | return ~((abi_ulong)0UL); | |
900 | } | |
84778508 | 901 | |
b4bebeee WL |
902 | retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); |
903 | if (retval >= 0) { | |
904 | retval = read(interpreter_fd, | |
905 | (char *) elf_phdata, | |
906 | sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
907 | } | |
908 | if (retval < 0) { | |
909 | perror("load_elf_interp"); | |
910 | exit(-1); | |
911 | free (elf_phdata); | |
912 | return retval; | |
913 | } | |
84778508 | 914 | #ifdef BSWAP_NEEDED |
b4bebeee WL |
915 | eppnt = elf_phdata; |
916 | for (i = 0; i<interp_elf_ex->e_phnum; i++, eppnt++) { | |
917 | bswap_phdr(eppnt); | |
918 | } | |
84778508 BS |
919 | #endif |
920 | ||
b4bebeee WL |
921 | if (interp_elf_ex->e_type == ET_DYN) { |
922 | /* in order to avoid hardcoding the interpreter load | |
923 | address in qemu, we allocate a big enough memory zone */ | |
924 | error = target_mmap(0, INTERP_MAP_SIZE, | |
925 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
926 | -1, 0); | |
927 | if (error == -1) { | |
928 | perror("mmap"); | |
929 | exit(-1); | |
84778508 | 930 | } |
b4bebeee WL |
931 | load_addr = error; |
932 | load_addr_set = 1; | |
933 | } | |
84778508 | 934 | |
b4bebeee WL |
935 | eppnt = elf_phdata; |
936 | for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) | |
937 | if (eppnt->p_type == PT_LOAD) { | |
84778508 BS |
938 | int elf_type = MAP_PRIVATE | MAP_DENYWRITE; |
939 | int elf_prot = 0; | |
940 | abi_ulong vaddr = 0; | |
941 | abi_ulong k; | |
942 | ||
943 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
944 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
945 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
946 | if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) { | |
947 | elf_type |= MAP_FIXED; | |
948 | vaddr = eppnt->p_vaddr; | |
949 | } | |
b4bebeee WL |
950 | error = target_mmap(load_addr + TARGET_ELF_PAGESTART(vaddr), |
951 | eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), | |
952 | elf_prot, | |
953 | elf_type, | |
954 | interpreter_fd, | |
955 | eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); | |
84778508 BS |
956 | |
957 | if (error == -1) { | |
b4bebeee WL |
958 | /* Real error */ |
959 | close(interpreter_fd); | |
960 | free(elf_phdata); | |
961 | return ~((abi_ulong)0UL); | |
84778508 BS |
962 | } |
963 | ||
964 | if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { | |
b4bebeee WL |
965 | load_addr = error; |
966 | load_addr_set = 1; | |
84778508 BS |
967 | } |
968 | ||
969 | /* | |
970 | * Find the end of the file mapping for this phdr, and keep | |
971 | * track of the largest address we see for this. | |
972 | */ | |
973 | k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; | |
974 | if (k > elf_bss) elf_bss = k; | |
975 | ||
976 | /* | |
977 | * Do the same thing for the memory mapping - between | |
978 | * elf_bss and last_bss is the bss section. | |
979 | */ | |
980 | k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; | |
981 | if (k > last_bss) last_bss = k; | |
b4bebeee | 982 | } |
84778508 | 983 | |
b4bebeee | 984 | /* Now use mmap to map the library into memory. */ |
84778508 | 985 | |
b4bebeee | 986 | close(interpreter_fd); |
84778508 | 987 | |
b4bebeee WL |
988 | /* |
989 | * Now fill out the bss section. First pad the last page up | |
990 | * to the page boundary, and then perform a mmap to make sure | |
991 | * that there are zeromapped pages up to and including the last | |
992 | * bss page. | |
993 | */ | |
994 | padzero(elf_bss, last_bss); | |
995 | elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ | |
996 | ||
997 | /* Map the last of the bss segment */ | |
998 | if (last_bss > elf_bss) { | |
999 | target_mmap(elf_bss, last_bss - elf_bss, | |
1000 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
1001 | MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0); | |
1002 | } | |
1003 | free(elf_phdata); | |
84778508 | 1004 | |
b4bebeee WL |
1005 | *interp_load_addr = load_addr; |
1006 | return ((abi_ulong) interp_elf_ex->e_entry) + load_addr; | |
84778508 BS |
1007 | } |
1008 | ||
1009 | static int symfind(const void *s0, const void *s1) | |
1010 | { | |
c7c530cd | 1011 | target_ulong addr = *(target_ulong *)s0; |
84778508 BS |
1012 | struct elf_sym *sym = (struct elf_sym *)s1; |
1013 | int result = 0; | |
c7c530cd | 1014 | if (addr < sym->st_value) { |
84778508 | 1015 | result = -1; |
c7c530cd | 1016 | } else if (addr >= sym->st_value + sym->st_size) { |
84778508 BS |
1017 | result = 1; |
1018 | } | |
1019 | return result; | |
1020 | } | |
1021 | ||
1022 | static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) | |
1023 | { | |
1024 | #if ELF_CLASS == ELFCLASS32 | |
1025 | struct elf_sym *syms = s->disas_symtab.elf32; | |
1026 | #else | |
1027 | struct elf_sym *syms = s->disas_symtab.elf64; | |
1028 | #endif | |
1029 | ||
1030 | // binary search | |
84778508 BS |
1031 | struct elf_sym *sym; |
1032 | ||
c7c530cd | 1033 | sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind); |
7cba04f6 | 1034 | if (sym != NULL) { |
84778508 BS |
1035 | return s->disas_strtab + sym->st_name; |
1036 | } | |
1037 | ||
1038 | return ""; | |
1039 | } | |
1040 | ||
1041 | /* FIXME: This should use elf_ops.h */ | |
1042 | static int symcmp(const void *s0, const void *s1) | |
1043 | { | |
1044 | struct elf_sym *sym0 = (struct elf_sym *)s0; | |
1045 | struct elf_sym *sym1 = (struct elf_sym *)s1; | |
1046 | return (sym0->st_value < sym1->st_value) | |
1047 | ? -1 | |
1048 | : ((sym0->st_value > sym1->st_value) ? 1 : 0); | |
1049 | } | |
1050 | ||
1051 | /* Best attempt to load symbols from this ELF object. */ | |
1052 | static void load_symbols(struct elfhdr *hdr, int fd) | |
1053 | { | |
1054 | unsigned int i, nsyms; | |
1055 | struct elf_shdr sechdr, symtab, strtab; | |
1056 | char *strings; | |
1057 | struct syminfo *s; | |
29718712 | 1058 | struct elf_sym *syms, *new_syms; |
84778508 BS |
1059 | |
1060 | lseek(fd, hdr->e_shoff, SEEK_SET); | |
1061 | for (i = 0; i < hdr->e_shnum; i++) { | |
1062 | if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) | |
1063 | return; | |
1064 | #ifdef BSWAP_NEEDED | |
1065 | bswap_shdr(&sechdr); | |
1066 | #endif | |
1067 | if (sechdr.sh_type == SHT_SYMTAB) { | |
1068 | symtab = sechdr; | |
1069 | lseek(fd, hdr->e_shoff | |
1070 | + sizeof(sechdr) * sechdr.sh_link, SEEK_SET); | |
1071 | if (read(fd, &strtab, sizeof(strtab)) | |
1072 | != sizeof(strtab)) | |
1073 | return; | |
1074 | #ifdef BSWAP_NEEDED | |
1075 | bswap_shdr(&strtab); | |
1076 | #endif | |
1077 | goto found; | |
1078 | } | |
1079 | } | |
1080 | return; /* Shouldn't happen... */ | |
1081 | ||
1082 | found: | |
1083 | /* Now know where the strtab and symtab are. Snarf them. */ | |
1084 | s = malloc(sizeof(*s)); | |
1085 | syms = malloc(symtab.sh_size); | |
29718712 SW |
1086 | if (!syms) { |
1087 | free(s); | |
84778508 | 1088 | return; |
29718712 | 1089 | } |
84778508 | 1090 | s->disas_strtab = strings = malloc(strtab.sh_size); |
29718712 SW |
1091 | if (!s->disas_strtab) { |
1092 | free(s); | |
1093 | free(syms); | |
84778508 | 1094 | return; |
29718712 | 1095 | } |
84778508 BS |
1096 | |
1097 | lseek(fd, symtab.sh_offset, SEEK_SET); | |
29718712 SW |
1098 | if (read(fd, syms, symtab.sh_size) != symtab.sh_size) { |
1099 | free(s); | |
1100 | free(syms); | |
1101 | free(strings); | |
84778508 | 1102 | return; |
29718712 | 1103 | } |
84778508 BS |
1104 | |
1105 | nsyms = symtab.sh_size / sizeof(struct elf_sym); | |
1106 | ||
1107 | i = 0; | |
1108 | while (i < nsyms) { | |
1109 | #ifdef BSWAP_NEEDED | |
1110 | bswap_sym(syms + i); | |
1111 | #endif | |
1112 | // Throw away entries which we do not need. | |
1113 | if (syms[i].st_shndx == SHN_UNDEF || | |
1114 | syms[i].st_shndx >= SHN_LORESERVE || | |
1115 | ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { | |
1116 | nsyms--; | |
1117 | if (i < nsyms) { | |
1118 | syms[i] = syms[nsyms]; | |
1119 | } | |
1120 | continue; | |
1121 | } | |
b4bebeee | 1122 | #if defined(TARGET_ARM) || defined(TARGET_MIPS) |
84778508 BS |
1123 | /* The bottom address bit marks a Thumb or MIPS16 symbol. */ |
1124 | syms[i].st_value &= ~(target_ulong)1; | |
1125 | #endif | |
1126 | i++; | |
1127 | } | |
29718712 SW |
1128 | |
1129 | /* Attempt to free the storage associated with the local symbols | |
1130 | that we threw away. Whether or not this has any effect on the | |
1131 | memory allocation depends on the malloc implementation and how | |
1132 | many symbols we managed to discard. */ | |
1133 | new_syms = realloc(syms, nsyms * sizeof(*syms)); | |
1134 | if (new_syms == NULL) { | |
1135 | free(s); | |
1136 | free(syms); | |
1137 | free(strings); | |
1138 | return; | |
1139 | } | |
1140 | syms = new_syms; | |
84778508 BS |
1141 | |
1142 | qsort(syms, nsyms, sizeof(*syms), symcmp); | |
1143 | ||
1144 | lseek(fd, strtab.sh_offset, SEEK_SET); | |
29718712 SW |
1145 | if (read(fd, strings, strtab.sh_size) != strtab.sh_size) { |
1146 | free(s); | |
1147 | free(syms); | |
1148 | free(strings); | |
84778508 | 1149 | return; |
29718712 | 1150 | } |
84778508 BS |
1151 | s->disas_num_syms = nsyms; |
1152 | #if ELF_CLASS == ELFCLASS32 | |
1153 | s->disas_symtab.elf32 = syms; | |
032e51d7 | 1154 | s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
84778508 BS |
1155 | #else |
1156 | s->disas_symtab.elf64 = syms; | |
032e51d7 | 1157 | s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
84778508 BS |
1158 | #endif |
1159 | s->next = syminfos; | |
1160 | syminfos = s; | |
1161 | } | |
1162 | ||
afcbcff8 | 1163 | int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, |
b4bebeee | 1164 | struct image_info *info) |
84778508 BS |
1165 | { |
1166 | struct elfhdr elf_ex; | |
1167 | struct elfhdr interp_elf_ex; | |
1168 | struct exec interp_ex; | |
1169 | int interpreter_fd = -1; /* avoid warning */ | |
1170 | abi_ulong load_addr, load_bias; | |
1171 | int load_addr_set = 0; | |
1172 | unsigned int interpreter_type = INTERPRETER_NONE; | |
1173 | unsigned char ibcs2_interpreter; | |
1174 | int i; | |
84778508 BS |
1175 | struct elf_phdr * elf_ppnt; |
1176 | struct elf_phdr *elf_phdata; | |
1177 | abi_ulong elf_bss, k, elf_brk; | |
1178 | int retval; | |
1179 | char * elf_interpreter; | |
1180 | abi_ulong elf_entry, interp_load_addr = 0; | |
84778508 BS |
1181 | abi_ulong start_code, end_code, start_data, end_data; |
1182 | abi_ulong reloc_func_desc = 0; | |
71025956 PM |
1183 | #ifdef LOW_ELF_STACK |
1184 | abi_ulong elf_stack = ~((abi_ulong)0UL); | |
1185 | #endif | |
84778508 BS |
1186 | char passed_fileno[6]; |
1187 | ||
1188 | ibcs2_interpreter = 0; | |
84778508 BS |
1189 | load_addr = 0; |
1190 | load_bias = 0; | |
1191 | elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ | |
1192 | #ifdef BSWAP_NEEDED | |
1193 | bswap_ehdr(&elf_ex); | |
1194 | #endif | |
1195 | ||
1196 | /* First of all, some simple consistency checks */ | |
1197 | if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) || | |
b4bebeee | 1198 | (!elf_check_arch(elf_ex.e_machine))) { |
84778508 BS |
1199 | return -ENOEXEC; |
1200 | } | |
1201 | ||
1202 | bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p); | |
b4bebeee WL |
1203 | bprm->p = copy_elf_strings(bprm->envc, bprm->envp, bprm->page,bprm->p); |
1204 | bprm->p = copy_elf_strings(bprm->argc, bprm->argv, bprm->page,bprm->p); | |
84778508 BS |
1205 | if (!bprm->p) { |
1206 | retval = -E2BIG; | |
1207 | } | |
1208 | ||
1209 | /* Now read in all of the header information */ | |
1210 | elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum); | |
1211 | if (elf_phdata == NULL) { | |
1212 | return -ENOMEM; | |
1213 | } | |
1214 | ||
1215 | retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); | |
b4bebeee WL |
1216 | if (retval > 0) { |
1217 | retval = read(bprm->fd, (char *)elf_phdata, | |
84778508 BS |
1218 | elf_ex.e_phentsize * elf_ex.e_phnum); |
1219 | } | |
1220 | ||
1221 | if (retval < 0) { | |
1222 | perror("load_elf_binary"); | |
1223 | exit(-1); | |
b4bebeee | 1224 | free(elf_phdata); |
84778508 BS |
1225 | return -errno; |
1226 | } | |
1227 | ||
1228 | #ifdef BSWAP_NEEDED | |
1229 | elf_ppnt = elf_phdata; | |
b4bebeee | 1230 | for (i = 0; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
84778508 BS |
1231 | bswap_phdr(elf_ppnt); |
1232 | } | |
1233 | #endif | |
1234 | elf_ppnt = elf_phdata; | |
1235 | ||
1236 | elf_bss = 0; | |
1237 | elf_brk = 0; | |
1238 | ||
1239 | ||
84778508 BS |
1240 | elf_interpreter = NULL; |
1241 | start_code = ~((abi_ulong)0UL); | |
1242 | end_code = 0; | |
1243 | start_data = 0; | |
1244 | end_data = 0; | |
1245 | interp_ex.a_info = 0; | |
1246 | ||
b4bebeee | 1247 | for (i = 0;i < elf_ex.e_phnum; i++) { |
84778508 | 1248 | if (elf_ppnt->p_type == PT_INTERP) { |
b4bebeee | 1249 | if (elf_interpreter != NULL) |
84778508 | 1250 | { |
b4bebeee | 1251 | free(elf_phdata); |
84778508 BS |
1252 | free(elf_interpreter); |
1253 | close(bprm->fd); | |
1254 | return -EINVAL; | |
1255 | } | |
1256 | ||
1257 | /* This is the program interpreter used for | |
1258 | * shared libraries - for now assume that this | |
1259 | * is an a.out format binary | |
1260 | */ | |
1261 | ||
1262 | elf_interpreter = (char *)malloc(elf_ppnt->p_filesz); | |
1263 | ||
1264 | if (elf_interpreter == NULL) { | |
b4bebeee | 1265 | free(elf_phdata); |
84778508 BS |
1266 | close(bprm->fd); |
1267 | return -ENOMEM; | |
1268 | } | |
1269 | ||
1270 | retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); | |
b4bebeee | 1271 | if (retval >= 0) { |
84778508 BS |
1272 | retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
1273 | } | |
b4bebeee | 1274 | if (retval < 0) { |
84778508 BS |
1275 | perror("load_elf_binary2"); |
1276 | exit(-1); | |
1277 | } | |
1278 | ||
1279 | /* If the program interpreter is one of these two, | |
1280 | then assume an iBCS2 image. Otherwise assume | |
1281 | a native linux image. */ | |
1282 | ||
1283 | /* JRP - Need to add X86 lib dir stuff here... */ | |
1284 | ||
b4bebeee WL |
1285 | if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0 || |
1286 | strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) { | |
84778508 BS |
1287 | ibcs2_interpreter = 1; |
1288 | } | |
1289 | ||
1290 | #if 0 | |
b7d43d03 | 1291 | printf("Using ELF interpreter %s\n", path(elf_interpreter)); |
84778508 BS |
1292 | #endif |
1293 | if (retval >= 0) { | |
1294 | retval = open(path(elf_interpreter), O_RDONLY); | |
b4bebeee | 1295 | if (retval >= 0) { |
84778508 BS |
1296 | interpreter_fd = retval; |
1297 | } | |
1298 | else { | |
1299 | perror(elf_interpreter); | |
1300 | exit(-1); | |
1301 | /* retval = -errno; */ | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | if (retval >= 0) { | |
1306 | retval = lseek(interpreter_fd, 0, SEEK_SET); | |
b4bebeee WL |
1307 | if (retval >= 0) { |
1308 | retval = read(interpreter_fd, bprm->buf, 128); | |
84778508 BS |
1309 | } |
1310 | } | |
1311 | if (retval >= 0) { | |
1312 | interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ | |
6ece4df6 | 1313 | interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
84778508 BS |
1314 | } |
1315 | if (retval < 0) { | |
1316 | perror("load_elf_binary3"); | |
1317 | exit(-1); | |
b4bebeee | 1318 | free(elf_phdata); |
84778508 BS |
1319 | free(elf_interpreter); |
1320 | close(bprm->fd); | |
1321 | return retval; | |
1322 | } | |
1323 | } | |
1324 | elf_ppnt++; | |
1325 | } | |
1326 | ||
1327 | /* Some simple consistency checks for the interpreter */ | |
b4bebeee | 1328 | if (elf_interpreter) { |
84778508 BS |
1329 | interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
1330 | ||
1331 | /* Now figure out which format our binary is */ | |
1332 | if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) && | |
1333 | (N_MAGIC(interp_ex) != QMAGIC)) { | |
b4bebeee | 1334 | interpreter_type = INTERPRETER_ELF; |
84778508 BS |
1335 | } |
1336 | ||
1337 | if (interp_elf_ex.e_ident[0] != 0x7f || | |
b4bebeee | 1338 | strncmp((char *)&interp_elf_ex.e_ident[1], "ELF", 3) != 0) { |
84778508 BS |
1339 | interpreter_type &= ~INTERPRETER_ELF; |
1340 | } | |
1341 | ||
1342 | if (!interpreter_type) { | |
1343 | free(elf_interpreter); | |
1344 | free(elf_phdata); | |
1345 | close(bprm->fd); | |
1346 | return -ELIBBAD; | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | /* OK, we are done with that, now set up the arg stuff, | |
1351 | and then start this sucker up */ | |
1352 | ||
1353 | { | |
b4bebeee | 1354 | char *passed_p; |
84778508 BS |
1355 | |
1356 | if (interpreter_type == INTERPRETER_AOUT) { | |
1357 | snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); | |
1358 | passed_p = passed_fileno; | |
1359 | ||
1360 | if (elf_interpreter) { | |
b4bebeee | 1361 | bprm->p = copy_elf_strings(1, &passed_p, bprm->page, bprm->p); |
84778508 BS |
1362 | bprm->argc++; |
1363 | } | |
1364 | } | |
1365 | if (!bprm->p) { | |
ef1e1e07 | 1366 | free(elf_interpreter); |
b4bebeee | 1367 | free(elf_phdata); |
84778508 BS |
1368 | close(bprm->fd); |
1369 | return -E2BIG; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* OK, This is the point of no return */ | |
1374 | info->end_data = 0; | |
1375 | info->end_code = 0; | |
1376 | info->start_mmap = (abi_ulong)ELF_START_MMAP; | |
1377 | info->mmap = 0; | |
1378 | elf_entry = (abi_ulong) elf_ex.e_entry; | |
1379 | ||
2fa5d9ba BS |
1380 | /* |
1381 | * In case where user has not explicitly set the guest_base, we | |
1382 | * probe here that should we set it automatically. | |
1383 | */ | |
1384 | if (!have_guest_base) { | |
1385 | /* | |
1386 | * Go through ELF program header table and find out whether | |
7d37435b | 1387 | * any of the segments drop below our current mmap_min_addr and |
2fa5d9ba BS |
1388 | * in that case set guest_base to corresponding address. |
1389 | */ | |
1390 | for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; | |
1391 | i++, elf_ppnt++) { | |
1392 | if (elf_ppnt->p_type != PT_LOAD) | |
1393 | continue; | |
1394 | if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) { | |
1395 | guest_base = HOST_PAGE_ALIGN(mmap_min_addr); | |
1396 | break; | |
1397 | } | |
1398 | } | |
1399 | } | |
2fa5d9ba | 1400 | |
84778508 BS |
1401 | /* Do this so that we can load the interpreter, if need be. We will |
1402 | change some of these later */ | |
1403 | info->rss = 0; | |
1404 | bprm->p = setup_arg_pages(bprm->p, bprm, info); | |
1405 | info->start_stack = bprm->p; | |
1406 | ||
1407 | /* Now we do a little grungy work by mmaping the ELF image into | |
1408 | * the correct location in memory. At this point, we assume that | |
1409 | * the image should be loaded at fixed address, not at a variable | |
1410 | * address. | |
1411 | */ | |
1412 | ||
b4bebeee | 1413 | for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
84778508 BS |
1414 | int elf_prot = 0; |
1415 | int elf_flags = 0; | |
1416 | abi_ulong error; | |
1417 | ||
1418 | if (elf_ppnt->p_type != PT_LOAD) | |
1419 | continue; | |
1420 | ||
1421 | if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ; | |
1422 | if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1423 | if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1424 | elf_flags = MAP_PRIVATE | MAP_DENYWRITE; | |
1425 | if (elf_ex.e_type == ET_EXEC || load_addr_set) { | |
1426 | elf_flags |= MAP_FIXED; | |
1427 | } else if (elf_ex.e_type == ET_DYN) { | |
1428 | /* Try and get dynamic programs out of the way of the default mmap | |
1429 | base, as well as whatever program they might try to exec. This | |
1430 | is because the brk will follow the loader, and is not movable. */ | |
1431 | /* NOTE: for qemu, we do a big mmap to get enough space | |
1432 | without hardcoding any address */ | |
1433 | error = target_mmap(0, ET_DYN_MAP_SIZE, | |
1434 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
1435 | -1, 0); | |
1436 | if (error == -1) { | |
1437 | perror("mmap"); | |
1438 | exit(-1); | |
1439 | } | |
1440 | load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); | |
1441 | } | |
1442 | ||
1443 | error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), | |
1444 | (elf_ppnt->p_filesz + | |
1445 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), | |
1446 | elf_prot, | |
1447 | (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), | |
1448 | bprm->fd, | |
1449 | (elf_ppnt->p_offset - | |
1450 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); | |
1451 | if (error == -1) { | |
1452 | perror("mmap"); | |
1453 | exit(-1); | |
1454 | } | |
1455 | ||
1456 | #ifdef LOW_ELF_STACK | |
1457 | if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack) | |
1458 | elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); | |
1459 | #endif | |
1460 | ||
1461 | if (!load_addr_set) { | |
1462 | load_addr_set = 1; | |
1463 | load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; | |
1464 | if (elf_ex.e_type == ET_DYN) { | |
1465 | load_bias += error - | |
1466 | TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); | |
1467 | load_addr += load_bias; | |
1468 | reloc_func_desc = load_bias; | |
1469 | } | |
1470 | } | |
1471 | k = elf_ppnt->p_vaddr; | |
1472 | if (k < start_code) | |
1473 | start_code = k; | |
1474 | if (start_data < k) | |
1475 | start_data = k; | |
1476 | k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; | |
1477 | if (k > elf_bss) | |
1478 | elf_bss = k; | |
1479 | if ((elf_ppnt->p_flags & PF_X) && end_code < k) | |
1480 | end_code = k; | |
1481 | if (end_data < k) | |
1482 | end_data = k; | |
1483 | k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; | |
1484 | if (k > elf_brk) elf_brk = k; | |
1485 | } | |
1486 | ||
1487 | elf_entry += load_bias; | |
1488 | elf_bss += load_bias; | |
1489 | elf_brk += load_bias; | |
1490 | start_code += load_bias; | |
1491 | end_code += load_bias; | |
1492 | start_data += load_bias; | |
1493 | end_data += load_bias; | |
1494 | ||
1495 | if (elf_interpreter) { | |
1496 | if (interpreter_type & 1) { | |
1497 | elf_entry = load_aout_interp(&interp_ex, interpreter_fd); | |
1498 | } | |
1499 | else if (interpreter_type & 2) { | |
1500 | elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, | |
1501 | &interp_load_addr); | |
1502 | } | |
1503 | reloc_func_desc = interp_load_addr; | |
1504 | ||
1505 | close(interpreter_fd); | |
1506 | free(elf_interpreter); | |
1507 | ||
1508 | if (elf_entry == ~((abi_ulong)0UL)) { | |
1509 | printf("Unable to load interpreter\n"); | |
1510 | free(elf_phdata); | |
1511 | exit(-1); | |
1512 | return 0; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | free(elf_phdata); | |
1517 | ||
93fcfe39 | 1518 | if (qemu_log_enabled()) |
84778508 BS |
1519 | load_symbols(&elf_ex, bprm->fd); |
1520 | ||
1521 | if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd); | |
1522 | info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); | |
1523 | ||
1524 | #ifdef LOW_ELF_STACK | |
1525 | info->start_stack = bprm->p = elf_stack - 4; | |
1526 | #endif | |
1527 | bprm->p = create_elf_tables(bprm->p, | |
1528 | bprm->argc, | |
1529 | bprm->envc, | |
1530 | &elf_ex, | |
1531 | load_addr, load_bias, | |
1532 | interp_load_addr, | |
1533 | (interpreter_type == INTERPRETER_AOUT ? 0 : 1), | |
1534 | info); | |
1535 | info->load_addr = reloc_func_desc; | |
1536 | info->start_brk = info->brk = elf_brk; | |
1537 | info->end_code = end_code; | |
1538 | info->start_code = start_code; | |
1539 | info->start_data = start_data; | |
1540 | info->end_data = end_data; | |
1541 | info->start_stack = bprm->p; | |
1542 | ||
1543 | /* Calling set_brk effectively mmaps the pages that we need for the bss and break | |
1544 | sections */ | |
1545 | set_brk(elf_bss, elf_brk); | |
1546 | ||
1547 | padzero(elf_bss, elf_brk); | |
1548 | ||
1549 | #if 0 | |
1550 | printf("(start_brk) %x\n" , info->start_brk); | |
1551 | printf("(end_code) %x\n" , info->end_code); | |
1552 | printf("(start_code) %x\n" , info->start_code); | |
1553 | printf("(end_data) %x\n" , info->end_data); | |
1554 | printf("(start_stack) %x\n" , info->start_stack); | |
1555 | printf("(brk) %x\n" , info->brk); | |
1556 | #endif | |
1557 | ||
b4bebeee | 1558 | if (info->personality == PER_SVR4) |
84778508 BS |
1559 | { |
1560 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, | |
1561 | and some applications "depend" upon this behavior. | |
1562 | Since we do not have the power to recompile these, we | |
1563 | emulate the SVr4 behavior. Sigh. */ | |
71025956 | 1564 | target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, |
84778508 BS |
1565 | MAP_FIXED | MAP_PRIVATE, -1, 0); |
1566 | } | |
1567 | ||
1568 | info->entry = elf_entry; | |
1569 | ||
1570 | return 0; | |
1571 | } | |
1572 | ||
b4bebeee | 1573 | static int load_aout_interp(void *exptr, int interp_fd) |
84778508 BS |
1574 | { |
1575 | printf("a.out interpreter not yet supported\n"); | |
1576 | return(0); | |
1577 | } | |
1578 | ||
1579 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
1580 | { | |
1581 | init_thread(regs, infop); | |
1582 | } |