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Commit | Line | Data |
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31e31b8a FB |
1 | /* This is the Linux kernel elf-loading code, ported into user space */ |
2 | ||
3 | #include <stdio.h> | |
4 | #include <sys/types.h> | |
5 | #include <fcntl.h> | |
31e31b8a FB |
6 | #include <errno.h> |
7 | #include <unistd.h> | |
8 | #include <sys/mman.h> | |
9 | #include <stdlib.h> | |
10 | #include <string.h> | |
11 | ||
3ef693a0 | 12 | #include "qemu.h" |
689f936f | 13 | #include "disas.h" |
31e31b8a | 14 | |
cb33da57 BS |
15 | /* from personality.h */ |
16 | ||
17 | /* | |
18 | * Flags for bug emulation. | |
19 | * | |
20 | * These occupy the top three bytes. | |
21 | */ | |
22 | enum { | |
23 | ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ | |
24 | FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors | |
25 | * (signal handling) | |
26 | */ | |
27 | MMAP_PAGE_ZERO = 0x0100000, | |
28 | ADDR_COMPAT_LAYOUT = 0x0200000, | |
29 | READ_IMPLIES_EXEC = 0x0400000, | |
30 | ADDR_LIMIT_32BIT = 0x0800000, | |
31 | SHORT_INODE = 0x1000000, | |
32 | WHOLE_SECONDS = 0x2000000, | |
33 | STICKY_TIMEOUTS = 0x4000000, | |
34 | ADDR_LIMIT_3GB = 0x8000000, | |
35 | }; | |
36 | ||
37 | /* | |
38 | * Personality types. | |
39 | * | |
40 | * These go in the low byte. Avoid using the top bit, it will | |
41 | * conflict with error returns. | |
42 | */ | |
43 | enum { | |
44 | PER_LINUX = 0x0000, | |
45 | PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, | |
46 | PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, | |
47 | PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
48 | PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, | |
49 | PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | | |
50 | WHOLE_SECONDS | SHORT_INODE, | |
51 | PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, | |
52 | PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, | |
53 | PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, | |
54 | PER_BSD = 0x0006, | |
55 | PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, | |
56 | PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, | |
57 | PER_LINUX32 = 0x0008, | |
58 | PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, | |
59 | PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ | |
60 | PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ | |
61 | PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ | |
62 | PER_RISCOS = 0x000c, | |
63 | PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, | |
64 | PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
65 | PER_OSF4 = 0x000f, /* OSF/1 v4 */ | |
66 | PER_HPUX = 0x0010, | |
67 | PER_MASK = 0x00ff, | |
68 | }; | |
69 | ||
70 | /* | |
71 | * Return the base personality without flags. | |
72 | */ | |
73 | #define personality(pers) (pers & PER_MASK) | |
74 | ||
83fb7adf FB |
75 | /* this flag is uneffective under linux too, should be deleted */ |
76 | #ifndef MAP_DENYWRITE | |
77 | #define MAP_DENYWRITE 0 | |
78 | #endif | |
79 | ||
80 | /* should probably go in elf.h */ | |
81 | #ifndef ELIBBAD | |
82 | #define ELIBBAD 80 | |
83 | #endif | |
84 | ||
30ac07d4 FB |
85 | #ifdef TARGET_I386 |
86 | ||
15338fd7 FB |
87 | #define ELF_PLATFORM get_elf_platform() |
88 | ||
89 | static const char *get_elf_platform(void) | |
90 | { | |
91 | static char elf_platform[] = "i386"; | |
92 | int family = (global_env->cpuid_version >> 8) & 0xff; | |
93 | if (family > 6) | |
94 | family = 6; | |
95 | if (family >= 3) | |
96 | elf_platform[1] = '0' + family; | |
97 | return elf_platform; | |
98 | } | |
99 | ||
100 | #define ELF_HWCAP get_elf_hwcap() | |
101 | ||
102 | static uint32_t get_elf_hwcap(void) | |
103 | { | |
104 | return global_env->cpuid_features; | |
105 | } | |
106 | ||
84409ddb JM |
107 | #ifdef TARGET_X86_64 |
108 | #define ELF_START_MMAP 0x2aaaaab000ULL | |
109 | #define elf_check_arch(x) ( ((x) == ELF_ARCH) ) | |
110 | ||
111 | #define ELF_CLASS ELFCLASS64 | |
112 | #define ELF_DATA ELFDATA2LSB | |
113 | #define ELF_ARCH EM_X86_64 | |
114 | ||
115 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
116 | { | |
117 | regs->rax = 0; | |
118 | regs->rsp = infop->start_stack; | |
119 | regs->rip = infop->entry; | |
120 | } | |
121 | ||
122 | #else | |
123 | ||
30ac07d4 FB |
124 | #define ELF_START_MMAP 0x80000000 |
125 | ||
30ac07d4 FB |
126 | /* |
127 | * This is used to ensure we don't load something for the wrong architecture. | |
128 | */ | |
129 | #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) | |
130 | ||
131 | /* | |
132 | * These are used to set parameters in the core dumps. | |
133 | */ | |
134 | #define ELF_CLASS ELFCLASS32 | |
135 | #define ELF_DATA ELFDATA2LSB | |
136 | #define ELF_ARCH EM_386 | |
137 | ||
b346ff46 FB |
138 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
139 | { | |
140 | regs->esp = infop->start_stack; | |
141 | regs->eip = infop->entry; | |
e5fe0c52 PB |
142 | |
143 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
144 | starts %edx contains a pointer to a function which might be | |
145 | registered using `atexit'. This provides a mean for the | |
146 | dynamic linker to call DT_FINI functions for shared libraries | |
147 | that have been loaded before the code runs. | |
148 | ||
149 | A value of 0 tells we have no such handler. */ | |
150 | regs->edx = 0; | |
b346ff46 | 151 | } |
84409ddb | 152 | #endif |
b346ff46 FB |
153 | |
154 | #define USE_ELF_CORE_DUMP | |
155 | #define ELF_EXEC_PAGESIZE 4096 | |
156 | ||
157 | #endif | |
158 | ||
159 | #ifdef TARGET_ARM | |
160 | ||
161 | #define ELF_START_MMAP 0x80000000 | |
162 | ||
163 | #define elf_check_arch(x) ( (x) == EM_ARM ) | |
164 | ||
165 | #define ELF_CLASS ELFCLASS32 | |
166 | #ifdef TARGET_WORDS_BIGENDIAN | |
167 | #define ELF_DATA ELFDATA2MSB | |
168 | #else | |
169 | #define ELF_DATA ELFDATA2LSB | |
170 | #endif | |
171 | #define ELF_ARCH EM_ARM | |
172 | ||
b346ff46 FB |
173 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
174 | { | |
992f48a0 | 175 | abi_long stack = infop->start_stack; |
b346ff46 FB |
176 | memset(regs, 0, sizeof(*regs)); |
177 | regs->ARM_cpsr = 0x10; | |
0240ded8 PB |
178 | if (infop->entry & 1) |
179 | regs->ARM_cpsr |= CPSR_T; | |
180 | regs->ARM_pc = infop->entry & 0xfffffffe; | |
b346ff46 | 181 | regs->ARM_sp = infop->start_stack; |
53a5960a PB |
182 | regs->ARM_r2 = tgetl(stack + 8); /* envp */ |
183 | regs->ARM_r1 = tgetl(stack + 4); /* envp */ | |
a1516e92 | 184 | /* XXX: it seems that r0 is zeroed after ! */ |
e5fe0c52 PB |
185 | regs->ARM_r0 = 0; |
186 | /* For uClinux PIC binaries. */ | |
863cf0b7 | 187 | /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ |
e5fe0c52 | 188 | regs->ARM_r10 = infop->start_data; |
b346ff46 FB |
189 | } |
190 | ||
30ac07d4 FB |
191 | #define USE_ELF_CORE_DUMP |
192 | #define ELF_EXEC_PAGESIZE 4096 | |
193 | ||
afce2927 FB |
194 | enum |
195 | { | |
196 | ARM_HWCAP_ARM_SWP = 1 << 0, | |
197 | ARM_HWCAP_ARM_HALF = 1 << 1, | |
198 | ARM_HWCAP_ARM_THUMB = 1 << 2, | |
199 | ARM_HWCAP_ARM_26BIT = 1 << 3, | |
200 | ARM_HWCAP_ARM_FAST_MULT = 1 << 4, | |
201 | ARM_HWCAP_ARM_FPA = 1 << 5, | |
202 | ARM_HWCAP_ARM_VFP = 1 << 6, | |
203 | ARM_HWCAP_ARM_EDSP = 1 << 7, | |
204 | }; | |
205 | ||
15338fd7 | 206 | #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \ |
afce2927 FB |
207 | | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
208 | | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP) | |
209 | ||
30ac07d4 FB |
210 | #endif |
211 | ||
853d6f7a | 212 | #ifdef TARGET_SPARC |
a315a145 | 213 | #ifdef TARGET_SPARC64 |
853d6f7a FB |
214 | |
215 | #define ELF_START_MMAP 0x80000000 | |
216 | ||
992f48a0 | 217 | #ifndef TARGET_ABI32 |
cb33da57 | 218 | #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS ) |
992f48a0 BS |
219 | #else |
220 | #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC ) | |
221 | #endif | |
853d6f7a | 222 | |
a315a145 FB |
223 | #define ELF_CLASS ELFCLASS64 |
224 | #define ELF_DATA ELFDATA2MSB | |
5ef54116 FB |
225 | #define ELF_ARCH EM_SPARCV9 |
226 | ||
227 | #define STACK_BIAS 2047 | |
a315a145 | 228 | |
a315a145 FB |
229 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
230 | { | |
992f48a0 | 231 | #ifndef TARGET_ABI32 |
a315a145 | 232 | regs->tstate = 0; |
992f48a0 | 233 | #endif |
a315a145 FB |
234 | regs->pc = infop->entry; |
235 | regs->npc = regs->pc + 4; | |
236 | regs->y = 0; | |
992f48a0 BS |
237 | #ifdef TARGET_ABI32 |
238 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
239 | #else | |
cb33da57 BS |
240 | if (personality(infop->personality) == PER_LINUX32) |
241 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
242 | else | |
243 | regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; | |
992f48a0 | 244 | #endif |
a315a145 FB |
245 | } |
246 | ||
247 | #else | |
248 | #define ELF_START_MMAP 0x80000000 | |
249 | ||
250 | #define elf_check_arch(x) ( (x) == EM_SPARC ) | |
251 | ||
853d6f7a FB |
252 | #define ELF_CLASS ELFCLASS32 |
253 | #define ELF_DATA ELFDATA2MSB | |
254 | #define ELF_ARCH EM_SPARC | |
255 | ||
853d6f7a FB |
256 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
257 | { | |
f5155289 FB |
258 | regs->psr = 0; |
259 | regs->pc = infop->entry; | |
260 | regs->npc = regs->pc + 4; | |
261 | regs->y = 0; | |
262 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
853d6f7a FB |
263 | } |
264 | ||
a315a145 | 265 | #endif |
853d6f7a FB |
266 | #endif |
267 | ||
67867308 FB |
268 | #ifdef TARGET_PPC |
269 | ||
270 | #define ELF_START_MMAP 0x80000000 | |
271 | ||
84409ddb JM |
272 | #ifdef TARGET_PPC64 |
273 | ||
274 | #define elf_check_arch(x) ( (x) == EM_PPC64 ) | |
275 | ||
276 | #define ELF_CLASS ELFCLASS64 | |
277 | ||
278 | #else | |
279 | ||
67867308 FB |
280 | #define elf_check_arch(x) ( (x) == EM_PPC ) |
281 | ||
282 | #define ELF_CLASS ELFCLASS32 | |
84409ddb JM |
283 | |
284 | #endif | |
285 | ||
67867308 FB |
286 | #ifdef TARGET_WORDS_BIGENDIAN |
287 | #define ELF_DATA ELFDATA2MSB | |
288 | #else | |
289 | #define ELF_DATA ELFDATA2LSB | |
290 | #endif | |
291 | #define ELF_ARCH EM_PPC | |
292 | ||
f5155289 FB |
293 | /* |
294 | * We need to put in some extra aux table entries to tell glibc what | |
295 | * the cache block size is, so it can use the dcbz instruction safely. | |
296 | */ | |
297 | #define AT_DCACHEBSIZE 19 | |
298 | #define AT_ICACHEBSIZE 20 | |
299 | #define AT_UCACHEBSIZE 21 | |
300 | /* A special ignored type value for PPC, for glibc compatibility. */ | |
301 | #define AT_IGNOREPPC 22 | |
302 | /* | |
303 | * The requirements here are: | |
304 | * - keep the final alignment of sp (sp & 0xf) | |
305 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
306 | * AUXV is greater than 16 for glibc compatibility. | |
307 | * AT_IGNOREPPC is used for that. | |
308 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
309 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
310 | */ | |
0bccf03d | 311 | #define DLINFO_ARCH_ITEMS 5 |
f5155289 FB |
312 | #define ARCH_DLINFO \ |
313 | do { \ | |
0bccf03d FB |
314 | NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \ |
315 | NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \ | |
316 | NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ | |
f5155289 FB |
317 | /* \ |
318 | * Now handle glibc compatibility. \ | |
319 | */ \ | |
0bccf03d FB |
320 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
321 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
f5155289 FB |
322 | } while (0) |
323 | ||
67867308 FB |
324 | static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
325 | { | |
992f48a0 BS |
326 | abi_ulong pos = infop->start_stack; |
327 | abi_ulong tmp; | |
84409ddb | 328 | #ifdef TARGET_PPC64 |
992f48a0 | 329 | abi_ulong entry, toc; |
84409ddb | 330 | #endif |
e5fe0c52 | 331 | |
67867308 FB |
332 | _regs->msr = 1 << MSR_PR; /* Set user mode */ |
333 | _regs->gpr[1] = infop->start_stack; | |
84409ddb JM |
334 | #ifdef TARGET_PPC64 |
335 | entry = ldq_raw(infop->entry) + infop->load_addr; | |
336 | toc = ldq_raw(infop->entry + 8) + infop->load_addr; | |
337 | _regs->gpr[2] = toc; | |
338 | infop->entry = entry; | |
339 | #endif | |
67867308 | 340 | _regs->nip = infop->entry; |
e5fe0c52 PB |
341 | /* Note that isn't exactly what regular kernel does |
342 | * but this is what the ABI wants and is needed to allow | |
343 | * execution of PPC BSD programs. | |
344 | */ | |
345 | _regs->gpr[3] = tgetl(pos); | |
992f48a0 | 346 | pos += sizeof(abi_ulong); |
e5fe0c52 | 347 | _regs->gpr[4] = pos; |
992f48a0 | 348 | for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong)) |
e5fe0c52 PB |
349 | tmp = ldl(pos); |
350 | _regs->gpr[5] = pos; | |
67867308 FB |
351 | } |
352 | ||
353 | #define USE_ELF_CORE_DUMP | |
354 | #define ELF_EXEC_PAGESIZE 4096 | |
355 | ||
356 | #endif | |
357 | ||
048f6b4d FB |
358 | #ifdef TARGET_MIPS |
359 | ||
360 | #define ELF_START_MMAP 0x80000000 | |
361 | ||
362 | #define elf_check_arch(x) ( (x) == EM_MIPS ) | |
363 | ||
388bb21a TS |
364 | #ifdef TARGET_MIPS64 |
365 | #define ELF_CLASS ELFCLASS64 | |
366 | #else | |
048f6b4d | 367 | #define ELF_CLASS ELFCLASS32 |
388bb21a | 368 | #endif |
048f6b4d FB |
369 | #ifdef TARGET_WORDS_BIGENDIAN |
370 | #define ELF_DATA ELFDATA2MSB | |
371 | #else | |
372 | #define ELF_DATA ELFDATA2LSB | |
373 | #endif | |
374 | #define ELF_ARCH EM_MIPS | |
375 | ||
048f6b4d FB |
376 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
377 | { | |
378 | regs->cp0_status = CP0St_UM; | |
379 | regs->cp0_epc = infop->entry; | |
380 | regs->regs[29] = infop->start_stack; | |
381 | } | |
382 | ||
388bb21a TS |
383 | #define USE_ELF_CORE_DUMP |
384 | #define ELF_EXEC_PAGESIZE 4096 | |
385 | ||
048f6b4d FB |
386 | #endif /* TARGET_MIPS */ |
387 | ||
fdf9b3e8 FB |
388 | #ifdef TARGET_SH4 |
389 | ||
390 | #define ELF_START_MMAP 0x80000000 | |
391 | ||
392 | #define elf_check_arch(x) ( (x) == EM_SH ) | |
393 | ||
394 | #define ELF_CLASS ELFCLASS32 | |
395 | #define ELF_DATA ELFDATA2LSB | |
396 | #define ELF_ARCH EM_SH | |
397 | ||
fdf9b3e8 FB |
398 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
399 | { | |
400 | /* Check other registers XXXXX */ | |
401 | regs->pc = infop->entry; | |
072ae847 | 402 | regs->regs[15] = infop->start_stack; |
fdf9b3e8 FB |
403 | } |
404 | ||
405 | #define USE_ELF_CORE_DUMP | |
406 | #define ELF_EXEC_PAGESIZE 4096 | |
407 | ||
408 | #endif | |
409 | ||
48733d19 TS |
410 | #ifdef TARGET_CRIS |
411 | ||
412 | #define ELF_START_MMAP 0x80000000 | |
413 | ||
414 | #define elf_check_arch(x) ( (x) == EM_CRIS ) | |
415 | ||
416 | #define ELF_CLASS ELFCLASS32 | |
417 | #define ELF_DATA ELFDATA2LSB | |
418 | #define ELF_ARCH EM_CRIS | |
419 | ||
420 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
421 | { | |
422 | regs->erp = infop->entry; | |
423 | } | |
424 | ||
425 | #define USE_ELF_CORE_DUMP | |
426 | #define ELF_EXEC_PAGESIZE 8192 | |
427 | ||
428 | #endif | |
429 | ||
e6e5906b PB |
430 | #ifdef TARGET_M68K |
431 | ||
432 | #define ELF_START_MMAP 0x80000000 | |
433 | ||
434 | #define elf_check_arch(x) ( (x) == EM_68K ) | |
435 | ||
436 | #define ELF_CLASS ELFCLASS32 | |
437 | #define ELF_DATA ELFDATA2MSB | |
438 | #define ELF_ARCH EM_68K | |
439 | ||
440 | /* ??? Does this need to do anything? | |
441 | #define ELF_PLAT_INIT(_r) */ | |
442 | ||
443 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
444 | { | |
445 | regs->usp = infop->start_stack; | |
446 | regs->sr = 0; | |
447 | regs->pc = infop->entry; | |
448 | } | |
449 | ||
450 | #define USE_ELF_CORE_DUMP | |
451 | #define ELF_EXEC_PAGESIZE 8192 | |
452 | ||
453 | #endif | |
454 | ||
7a3148a9 JM |
455 | #ifdef TARGET_ALPHA |
456 | ||
457 | #define ELF_START_MMAP (0x30000000000ULL) | |
458 | ||
459 | #define elf_check_arch(x) ( (x) == ELF_ARCH ) | |
460 | ||
461 | #define ELF_CLASS ELFCLASS64 | |
462 | #define ELF_DATA ELFDATA2MSB | |
463 | #define ELF_ARCH EM_ALPHA | |
464 | ||
465 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
466 | { | |
467 | regs->pc = infop->entry; | |
468 | regs->ps = 8; | |
469 | regs->usp = infop->start_stack; | |
470 | regs->unique = infop->start_data; /* ? */ | |
471 | printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", | |
472 | regs->unique, infop->start_data); | |
473 | } | |
474 | ||
475 | #define USE_ELF_CORE_DUMP | |
476 | #define ELF_EXEC_PAGESIZE 8192 | |
477 | ||
478 | #endif /* TARGET_ALPHA */ | |
479 | ||
15338fd7 FB |
480 | #ifndef ELF_PLATFORM |
481 | #define ELF_PLATFORM (NULL) | |
482 | #endif | |
483 | ||
484 | #ifndef ELF_HWCAP | |
485 | #define ELF_HWCAP 0 | |
486 | #endif | |
487 | ||
992f48a0 | 488 | #ifdef TARGET_ABI32 |
cb33da57 | 489 | #undef ELF_CLASS |
992f48a0 | 490 | #define ELF_CLASS ELFCLASS32 |
cb33da57 BS |
491 | #undef bswaptls |
492 | #define bswaptls(ptr) bswap32s(ptr) | |
493 | #endif | |
494 | ||
31e31b8a | 495 | #include "elf.h" |
09bfb054 | 496 | |
09bfb054 FB |
497 | struct exec |
498 | { | |
499 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ | |
500 | unsigned int a_text; /* length of text, in bytes */ | |
501 | unsigned int a_data; /* length of data, in bytes */ | |
502 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
503 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
504 | unsigned int a_entry; /* start address */ | |
505 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
506 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
507 | }; | |
508 | ||
509 | ||
510 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
511 | #define OMAGIC 0407 | |
512 | #define NMAGIC 0410 | |
513 | #define ZMAGIC 0413 | |
514 | #define QMAGIC 0314 | |
515 | ||
09bfb054 FB |
516 | /* max code+data+bss space allocated to elf interpreter */ |
517 | #define INTERP_MAP_SIZE (32 * 1024 * 1024) | |
518 | ||
519 | /* max code+data+bss+brk space allocated to ET_DYN executables */ | |
520 | #define ET_DYN_MAP_SIZE (128 * 1024 * 1024) | |
521 | ||
31e31b8a | 522 | /* Necessary parameters */ |
54936004 FB |
523 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE |
524 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) | |
525 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) | |
31e31b8a FB |
526 | |
527 | #define INTERPRETER_NONE 0 | |
528 | #define INTERPRETER_AOUT 1 | |
529 | #define INTERPRETER_ELF 2 | |
530 | ||
15338fd7 | 531 | #define DLINFO_ITEMS 12 |
31e31b8a | 532 | |
09bfb054 FB |
533 | static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
534 | { | |
535 | memcpy(to, from, n); | |
536 | } | |
d691f669 | 537 | |
31e31b8a FB |
538 | extern unsigned long x86_stack_size; |
539 | ||
540 | static int load_aout_interp(void * exptr, int interp_fd); | |
541 | ||
542 | #ifdef BSWAP_NEEDED | |
92a31b1f | 543 | static void bswap_ehdr(struct elfhdr *ehdr) |
31e31b8a FB |
544 | { |
545 | bswap16s(&ehdr->e_type); /* Object file type */ | |
546 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
547 | bswap32s(&ehdr->e_version); /* Object file version */ | |
92a31b1f FB |
548 | bswaptls(&ehdr->e_entry); /* Entry point virtual address */ |
549 | bswaptls(&ehdr->e_phoff); /* Program header table file offset */ | |
550 | bswaptls(&ehdr->e_shoff); /* Section header table file offset */ | |
31e31b8a FB |
551 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ |
552 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
553 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
554 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
555 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
556 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
557 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
558 | } | |
559 | ||
92a31b1f | 560 | static void bswap_phdr(struct elf_phdr *phdr) |
31e31b8a FB |
561 | { |
562 | bswap32s(&phdr->p_type); /* Segment type */ | |
92a31b1f FB |
563 | bswaptls(&phdr->p_offset); /* Segment file offset */ |
564 | bswaptls(&phdr->p_vaddr); /* Segment virtual address */ | |
565 | bswaptls(&phdr->p_paddr); /* Segment physical address */ | |
566 | bswaptls(&phdr->p_filesz); /* Segment size in file */ | |
567 | bswaptls(&phdr->p_memsz); /* Segment size in memory */ | |
31e31b8a | 568 | bswap32s(&phdr->p_flags); /* Segment flags */ |
92a31b1f | 569 | bswaptls(&phdr->p_align); /* Segment alignment */ |
31e31b8a | 570 | } |
689f936f | 571 | |
92a31b1f | 572 | static void bswap_shdr(struct elf_shdr *shdr) |
689f936f FB |
573 | { |
574 | bswap32s(&shdr->sh_name); | |
575 | bswap32s(&shdr->sh_type); | |
92a31b1f FB |
576 | bswaptls(&shdr->sh_flags); |
577 | bswaptls(&shdr->sh_addr); | |
578 | bswaptls(&shdr->sh_offset); | |
579 | bswaptls(&shdr->sh_size); | |
689f936f FB |
580 | bswap32s(&shdr->sh_link); |
581 | bswap32s(&shdr->sh_info); | |
92a31b1f FB |
582 | bswaptls(&shdr->sh_addralign); |
583 | bswaptls(&shdr->sh_entsize); | |
689f936f FB |
584 | } |
585 | ||
7a3148a9 | 586 | static void bswap_sym(struct elf_sym *sym) |
689f936f FB |
587 | { |
588 | bswap32s(&sym->st_name); | |
7a3148a9 JM |
589 | bswaptls(&sym->st_value); |
590 | bswaptls(&sym->st_size); | |
689f936f FB |
591 | bswap16s(&sym->st_shndx); |
592 | } | |
31e31b8a FB |
593 | #endif |
594 | ||
31e31b8a | 595 | /* |
e5fe0c52 | 596 | * 'copy_elf_strings()' copies argument/envelope strings from user |
31e31b8a FB |
597 | * memory to free pages in kernel mem. These are in a format ready |
598 | * to be put directly into the top of new user memory. | |
599 | * | |
600 | */ | |
992f48a0 BS |
601 | static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
602 | abi_ulong p) | |
31e31b8a FB |
603 | { |
604 | char *tmp, *tmp1, *pag = NULL; | |
605 | int len, offset = 0; | |
606 | ||
607 | if (!p) { | |
608 | return 0; /* bullet-proofing */ | |
609 | } | |
610 | while (argc-- > 0) { | |
edf779ff FB |
611 | tmp = argv[argc]; |
612 | if (!tmp) { | |
31e31b8a FB |
613 | fprintf(stderr, "VFS: argc is wrong"); |
614 | exit(-1); | |
615 | } | |
edf779ff FB |
616 | tmp1 = tmp; |
617 | while (*tmp++); | |
31e31b8a FB |
618 | len = tmp - tmp1; |
619 | if (p < len) { /* this shouldn't happen - 128kB */ | |
620 | return 0; | |
621 | } | |
622 | while (len) { | |
623 | --p; --tmp; --len; | |
624 | if (--offset < 0) { | |
54936004 | 625 | offset = p % TARGET_PAGE_SIZE; |
53a5960a | 626 | pag = (char *)page[p/TARGET_PAGE_SIZE]; |
44a91cae | 627 | if (!pag) { |
53a5960a | 628 | pag = (char *)malloc(TARGET_PAGE_SIZE); |
4118a970 | 629 | memset(pag, 0, TARGET_PAGE_SIZE); |
53a5960a | 630 | page[p/TARGET_PAGE_SIZE] = pag; |
44a91cae FB |
631 | if (!pag) |
632 | return 0; | |
31e31b8a FB |
633 | } |
634 | } | |
635 | if (len == 0 || offset == 0) { | |
edf779ff | 636 | *(pag + offset) = *tmp; |
31e31b8a FB |
637 | } |
638 | else { | |
639 | int bytes_to_copy = (len > offset) ? offset : len; | |
640 | tmp -= bytes_to_copy; | |
641 | p -= bytes_to_copy; | |
642 | offset -= bytes_to_copy; | |
643 | len -= bytes_to_copy; | |
644 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
645 | } | |
646 | } | |
647 | } | |
648 | return p; | |
649 | } | |
650 | ||
992f48a0 BS |
651 | static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
652 | struct image_info *info) | |
53a5960a | 653 | { |
992f48a0 | 654 | abi_ulong stack_base, size, error; |
31e31b8a | 655 | int i; |
31e31b8a | 656 | |
09bfb054 FB |
657 | /* Create enough stack to hold everything. If we don't use |
658 | * it for args, we'll use it for something else... | |
659 | */ | |
660 | size = x86_stack_size; | |
54936004 FB |
661 | if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) |
662 | size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; | |
5fafdf24 | 663 | error = target_mmap(0, |
83fb7adf | 664 | size + qemu_host_page_size, |
54936004 FB |
665 | PROT_READ | PROT_WRITE, |
666 | MAP_PRIVATE | MAP_ANONYMOUS, | |
667 | -1, 0); | |
09bfb054 FB |
668 | if (error == -1) { |
669 | perror("stk mmap"); | |
670 | exit(-1); | |
671 | } | |
672 | /* we reserve one extra page at the top of the stack as guard */ | |
83fb7adf | 673 | target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
31e31b8a | 674 | |
54936004 | 675 | stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
31e31b8a | 676 | p += stack_base; |
09bfb054 | 677 | |
31e31b8a FB |
678 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
679 | if (bprm->page[i]) { | |
680 | info->rss++; | |
681 | ||
53a5960a PB |
682 | memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
683 | free(bprm->page[i]); | |
31e31b8a | 684 | } |
53a5960a | 685 | stack_base += TARGET_PAGE_SIZE; |
31e31b8a FB |
686 | } |
687 | return p; | |
688 | } | |
689 | ||
992f48a0 | 690 | static void set_brk(abi_ulong start, abi_ulong end) |
31e31b8a FB |
691 | { |
692 | /* page-align the start and end addresses... */ | |
54936004 FB |
693 | start = HOST_PAGE_ALIGN(start); |
694 | end = HOST_PAGE_ALIGN(end); | |
31e31b8a FB |
695 | if (end <= start) |
696 | return; | |
54936004 FB |
697 | if(target_mmap(start, end - start, |
698 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
699 | MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { | |
31e31b8a FB |
700 | perror("cannot mmap brk"); |
701 | exit(-1); | |
702 | } | |
703 | } | |
704 | ||
705 | ||
853d6f7a FB |
706 | /* We need to explicitly zero any fractional pages after the data |
707 | section (i.e. bss). This would contain the junk from the file that | |
708 | should not be in memory. */ | |
992f48a0 | 709 | static void padzero(abi_ulong elf_bss, abi_ulong last_bss) |
31e31b8a | 710 | { |
992f48a0 | 711 | abi_ulong nbyte; |
31e31b8a | 712 | |
768a4a36 TS |
713 | if (elf_bss >= last_bss) |
714 | return; | |
715 | ||
853d6f7a FB |
716 | /* XXX: this is really a hack : if the real host page size is |
717 | smaller than the target page size, some pages after the end | |
718 | of the file may not be mapped. A better fix would be to | |
719 | patch target_mmap(), but it is more complicated as the file | |
720 | size must be known */ | |
83fb7adf | 721 | if (qemu_real_host_page_size < qemu_host_page_size) { |
992f48a0 | 722 | abi_ulong end_addr, end_addr1; |
5fafdf24 | 723 | end_addr1 = (elf_bss + qemu_real_host_page_size - 1) & |
83fb7adf | 724 | ~(qemu_real_host_page_size - 1); |
853d6f7a FB |
725 | end_addr = HOST_PAGE_ALIGN(elf_bss); |
726 | if (end_addr1 < end_addr) { | |
863cf0b7 | 727 | mmap((void *)g2h(end_addr1), end_addr - end_addr1, |
853d6f7a FB |
728 | PROT_READ|PROT_WRITE|PROT_EXEC, |
729 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
730 | } | |
731 | } | |
732 | ||
83fb7adf | 733 | nbyte = elf_bss & (qemu_host_page_size-1); |
31e31b8a | 734 | if (nbyte) { |
83fb7adf | 735 | nbyte = qemu_host_page_size - nbyte; |
31e31b8a | 736 | do { |
53a5960a PB |
737 | tput8(elf_bss, 0); |
738 | elf_bss++; | |
31e31b8a FB |
739 | } while (--nbyte); |
740 | } | |
741 | } | |
742 | ||
53a5960a | 743 | |
992f48a0 BS |
744 | static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
745 | struct elfhdr * exec, | |
746 | abi_ulong load_addr, | |
747 | abi_ulong load_bias, | |
748 | abi_ulong interp_load_addr, int ibcs, | |
749 | struct image_info *info) | |
31e31b8a | 750 | { |
992f48a0 | 751 | abi_ulong sp; |
53a5960a | 752 | int size; |
992f48a0 | 753 | abi_ulong u_platform; |
15338fd7 | 754 | const char *k_platform; |
863cf0b7 | 755 | const int n = sizeof(elf_addr_t); |
edf779ff | 756 | |
53a5960a PB |
757 | sp = p; |
758 | u_platform = 0; | |
15338fd7 FB |
759 | k_platform = ELF_PLATFORM; |
760 | if (k_platform) { | |
761 | size_t len = strlen(k_platform) + 1; | |
53a5960a PB |
762 | sp -= (len + n - 1) & ~(n - 1); |
763 | u_platform = sp; | |
764 | memcpy_to_target(sp, k_platform, len); | |
15338fd7 | 765 | } |
53a5960a PB |
766 | /* |
767 | * Force 16 byte _final_ alignment here for generality. | |
768 | */ | |
992f48a0 | 769 | sp = sp &~ (abi_ulong)15; |
53a5960a | 770 | size = (DLINFO_ITEMS + 1) * 2; |
15338fd7 | 771 | if (k_platform) |
53a5960a | 772 | size += 2; |
f5155289 | 773 | #ifdef DLINFO_ARCH_ITEMS |
53a5960a | 774 | size += DLINFO_ARCH_ITEMS * 2; |
f5155289 | 775 | #endif |
53a5960a PB |
776 | size += envc + argc + 2; |
777 | size += (!ibcs ? 3 : 1); /* argc itself */ | |
778 | size *= n; | |
779 | if (size & 15) | |
780 | sp -= 16 - (size & 15); | |
3b46e624 | 781 | |
863cf0b7 JM |
782 | /* This is correct because Linux defines |
783 | * elf_addr_t as Elf32_Off / Elf64_Off | |
784 | */ | |
785 | #if ELF_CLASS == ELFCLASS32 | |
53a5960a | 786 | #define NEW_AUX_ENT(id, val) do { \ |
863cf0b7 JM |
787 | sp -= n; tput32(sp, val); \ |
788 | sp -= n; tput32(sp, id); \ | |
53a5960a | 789 | } while(0) |
863cf0b7 JM |
790 | #else |
791 | #define NEW_AUX_ENT(id, val) do { \ | |
792 | sp -= n; tput64(sp, val); \ | |
793 | sp -= n; tput64(sp, id); \ | |
794 | } while(0) | |
795 | #endif | |
0bccf03d FB |
796 | NEW_AUX_ENT (AT_NULL, 0); |
797 | ||
798 | /* There must be exactly DLINFO_ITEMS entries here. */ | |
992f48a0 BS |
799 | NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
800 | NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); | |
801 | NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); | |
802 | NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); | |
803 | NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); | |
804 | NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); | |
0bccf03d | 805 | NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
992f48a0 BS |
806 | NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
807 | NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); | |
808 | NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); | |
809 | NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); | |
810 | NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); | |
15338fd7 | 811 | if (k_platform) |
53a5960a | 812 | NEW_AUX_ENT(AT_PLATFORM, u_platform); |
f5155289 | 813 | #ifdef ARCH_DLINFO |
5fafdf24 | 814 | /* |
f5155289 FB |
815 | * ARCH_DLINFO must come last so platform specific code can enforce |
816 | * special alignment requirements on the AUXV if necessary (eg. PPC). | |
817 | */ | |
818 | ARCH_DLINFO; | |
819 | #endif | |
820 | #undef NEW_AUX_ENT | |
821 | ||
e5fe0c52 | 822 | sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
31e31b8a FB |
823 | return sp; |
824 | } | |
825 | ||
826 | ||
992f48a0 BS |
827 | static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
828 | int interpreter_fd, | |
829 | abi_ulong *interp_load_addr) | |
31e31b8a FB |
830 | { |
831 | struct elf_phdr *elf_phdata = NULL; | |
832 | struct elf_phdr *eppnt; | |
992f48a0 | 833 | abi_ulong load_addr = 0; |
31e31b8a FB |
834 | int load_addr_set = 0; |
835 | int retval; | |
992f48a0 BS |
836 | abi_ulong last_bss, elf_bss; |
837 | abi_ulong error; | |
31e31b8a | 838 | int i; |
5fafdf24 | 839 | |
31e31b8a FB |
840 | elf_bss = 0; |
841 | last_bss = 0; | |
842 | error = 0; | |
843 | ||
644c433c FB |
844 | #ifdef BSWAP_NEEDED |
845 | bswap_ehdr(interp_elf_ex); | |
846 | #endif | |
31e31b8a | 847 | /* First of all, some simple consistency checks */ |
5fafdf24 TS |
848 | if ((interp_elf_ex->e_type != ET_EXEC && |
849 | interp_elf_ex->e_type != ET_DYN) || | |
31e31b8a | 850 | !elf_check_arch(interp_elf_ex->e_machine)) { |
992f48a0 | 851 | return ~((abi_ulong)0UL); |
31e31b8a | 852 | } |
5fafdf24 | 853 | |
644c433c | 854 | |
31e31b8a | 855 | /* Now read in all of the header information */ |
5fafdf24 | 856 | |
54936004 | 857 | if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
992f48a0 | 858 | return ~(abi_ulong)0UL; |
5fafdf24 TS |
859 | |
860 | elf_phdata = (struct elf_phdr *) | |
31e31b8a FB |
861 | malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
862 | ||
863 | if (!elf_phdata) | |
992f48a0 | 864 | return ~((abi_ulong)0UL); |
5fafdf24 | 865 | |
31e31b8a FB |
866 | /* |
867 | * If the size of this structure has changed, then punt, since | |
868 | * we will be doing the wrong thing. | |
869 | */ | |
09bfb054 | 870 | if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
31e31b8a | 871 | free(elf_phdata); |
992f48a0 | 872 | return ~((abi_ulong)0UL); |
09bfb054 | 873 | } |
31e31b8a FB |
874 | |
875 | retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); | |
876 | if(retval >= 0) { | |
877 | retval = read(interpreter_fd, | |
878 | (char *) elf_phdata, | |
879 | sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
880 | } | |
31e31b8a FB |
881 | if (retval < 0) { |
882 | perror("load_elf_interp"); | |
883 | exit(-1); | |
884 | free (elf_phdata); | |
885 | return retval; | |
886 | } | |
887 | #ifdef BSWAP_NEEDED | |
888 | eppnt = elf_phdata; | |
889 | for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { | |
890 | bswap_phdr(eppnt); | |
891 | } | |
892 | #endif | |
09bfb054 FB |
893 | |
894 | if (interp_elf_ex->e_type == ET_DYN) { | |
e91c8a77 | 895 | /* in order to avoid hardcoding the interpreter load |
09bfb054 | 896 | address in qemu, we allocate a big enough memory zone */ |
54936004 | 897 | error = target_mmap(0, INTERP_MAP_SIZE, |
5fafdf24 | 898 | PROT_NONE, MAP_PRIVATE | MAP_ANON, |
54936004 | 899 | -1, 0); |
09bfb054 FB |
900 | if (error == -1) { |
901 | perror("mmap"); | |
902 | exit(-1); | |
903 | } | |
904 | load_addr = error; | |
905 | load_addr_set = 1; | |
906 | } | |
907 | ||
31e31b8a FB |
908 | eppnt = elf_phdata; |
909 | for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) | |
910 | if (eppnt->p_type == PT_LOAD) { | |
911 | int elf_type = MAP_PRIVATE | MAP_DENYWRITE; | |
912 | int elf_prot = 0; | |
992f48a0 BS |
913 | abi_ulong vaddr = 0; |
914 | abi_ulong k; | |
31e31b8a FB |
915 | |
916 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
917 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
918 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
919 | if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) { | |
920 | elf_type |= MAP_FIXED; | |
921 | vaddr = eppnt->p_vaddr; | |
922 | } | |
54936004 FB |
923 | error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
924 | eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), | |
31e31b8a FB |
925 | elf_prot, |
926 | elf_type, | |
927 | interpreter_fd, | |
54936004 | 928 | eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
3b46e624 | 929 | |
e89f07d3 | 930 | if (error == -1) { |
31e31b8a FB |
931 | /* Real error */ |
932 | close(interpreter_fd); | |
933 | free(elf_phdata); | |
992f48a0 | 934 | return ~((abi_ulong)0UL); |
31e31b8a FB |
935 | } |
936 | ||
937 | if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { | |
938 | load_addr = error; | |
939 | load_addr_set = 1; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Find the end of the file mapping for this phdr, and keep | |
944 | * track of the largest address we see for this. | |
945 | */ | |
946 | k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; | |
947 | if (k > elf_bss) elf_bss = k; | |
948 | ||
949 | /* | |
950 | * Do the same thing for the memory mapping - between | |
951 | * elf_bss and last_bss is the bss section. | |
952 | */ | |
953 | k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; | |
954 | if (k > last_bss) last_bss = k; | |
955 | } | |
5fafdf24 | 956 | |
31e31b8a FB |
957 | /* Now use mmap to map the library into memory. */ |
958 | ||
959 | close(interpreter_fd); | |
960 | ||
961 | /* | |
962 | * Now fill out the bss section. First pad the last page up | |
963 | * to the page boundary, and then perform a mmap to make sure | |
964 | * that there are zeromapped pages up to and including the last | |
965 | * bss page. | |
966 | */ | |
768a4a36 | 967 | padzero(elf_bss, last_bss); |
83fb7adf | 968 | elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
31e31b8a FB |
969 | |
970 | /* Map the last of the bss segment */ | |
971 | if (last_bss > elf_bss) { | |
54936004 FB |
972 | target_mmap(elf_bss, last_bss-elf_bss, |
973 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
974 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
31e31b8a FB |
975 | } |
976 | free(elf_phdata); | |
977 | ||
978 | *interp_load_addr = load_addr; | |
992f48a0 | 979 | return ((abi_ulong) interp_elf_ex->e_entry) + load_addr; |
31e31b8a FB |
980 | } |
981 | ||
689f936f FB |
982 | /* Best attempt to load symbols from this ELF object. */ |
983 | static void load_symbols(struct elfhdr *hdr, int fd) | |
984 | { | |
985 | unsigned int i; | |
986 | struct elf_shdr sechdr, symtab, strtab; | |
987 | char *strings; | |
e80cfcfc | 988 | struct syminfo *s; |
0774bed1 BS |
989 | #if (ELF_CLASS == ELFCLASS64) |
990 | // Disas uses 32 bit symbols | |
991 | struct elf32_sym *syms32 = NULL; | |
992 | struct elf_sym *sym; | |
993 | #endif | |
689f936f FB |
994 | |
995 | lseek(fd, hdr->e_shoff, SEEK_SET); | |
996 | for (i = 0; i < hdr->e_shnum; i++) { | |
997 | if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) | |
998 | return; | |
999 | #ifdef BSWAP_NEEDED | |
1000 | bswap_shdr(&sechdr); | |
1001 | #endif | |
1002 | if (sechdr.sh_type == SHT_SYMTAB) { | |
1003 | symtab = sechdr; | |
1004 | lseek(fd, hdr->e_shoff | |
1005 | + sizeof(sechdr) * sechdr.sh_link, SEEK_SET); | |
1006 | if (read(fd, &strtab, sizeof(strtab)) | |
1007 | != sizeof(strtab)) | |
1008 | return; | |
1009 | #ifdef BSWAP_NEEDED | |
1010 | bswap_shdr(&strtab); | |
1011 | #endif | |
1012 | goto found; | |
1013 | } | |
1014 | } | |
1015 | return; /* Shouldn't happen... */ | |
1016 | ||
1017 | found: | |
1018 | /* Now know where the strtab and symtab are. Snarf them. */ | |
e80cfcfc FB |
1019 | s = malloc(sizeof(*s)); |
1020 | s->disas_symtab = malloc(symtab.sh_size); | |
0774bed1 BS |
1021 | #if (ELF_CLASS == ELFCLASS64) |
1022 | syms32 = malloc(symtab.sh_size / sizeof(struct elf_sym) | |
1023 | * sizeof(struct elf32_sym)); | |
1024 | #endif | |
e80cfcfc FB |
1025 | s->disas_strtab = strings = malloc(strtab.sh_size); |
1026 | if (!s->disas_symtab || !s->disas_strtab) | |
689f936f | 1027 | return; |
5fafdf24 | 1028 | |
689f936f | 1029 | lseek(fd, symtab.sh_offset, SEEK_SET); |
e80cfcfc | 1030 | if (read(fd, s->disas_symtab, symtab.sh_size) != symtab.sh_size) |
689f936f | 1031 | return; |
31e31b8a | 1032 | |
0774bed1 | 1033 | for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++) { |
689f936f | 1034 | #ifdef BSWAP_NEEDED |
e80cfcfc | 1035 | bswap_sym(s->disas_symtab + sizeof(struct elf_sym)*i); |
689f936f | 1036 | #endif |
0774bed1 BS |
1037 | #if (ELF_CLASS == ELFCLASS64) |
1038 | sym = s->disas_symtab + sizeof(struct elf_sym)*i; | |
1039 | syms32[i].st_name = sym->st_name; | |
1040 | syms32[i].st_info = sym->st_info; | |
1041 | syms32[i].st_other = sym->st_other; | |
1042 | syms32[i].st_shndx = sym->st_shndx; | |
1043 | syms32[i].st_value = sym->st_value & 0xffffffff; | |
1044 | syms32[i].st_size = sym->st_size & 0xffffffff; | |
1045 | #endif | |
1046 | } | |
689f936f | 1047 | |
0774bed1 BS |
1048 | #if (ELF_CLASS == ELFCLASS64) |
1049 | free(s->disas_symtab); | |
1050 | s->disas_symtab = syms32; | |
1051 | #endif | |
689f936f FB |
1052 | lseek(fd, strtab.sh_offset, SEEK_SET); |
1053 | if (read(fd, strings, strtab.sh_size) != strtab.sh_size) | |
1054 | return; | |
e80cfcfc FB |
1055 | s->disas_num_syms = symtab.sh_size / sizeof(struct elf_sym); |
1056 | s->next = syminfos; | |
1057 | syminfos = s; | |
689f936f | 1058 | } |
31e31b8a | 1059 | |
e5fe0c52 PB |
1060 | int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1061 | struct image_info * info) | |
31e31b8a FB |
1062 | { |
1063 | struct elfhdr elf_ex; | |
1064 | struct elfhdr interp_elf_ex; | |
1065 | struct exec interp_ex; | |
1066 | int interpreter_fd = -1; /* avoid warning */ | |
992f48a0 | 1067 | abi_ulong load_addr, load_bias; |
31e31b8a FB |
1068 | int load_addr_set = 0; |
1069 | unsigned int interpreter_type = INTERPRETER_NONE; | |
1070 | unsigned char ibcs2_interpreter; | |
1071 | int i; | |
992f48a0 | 1072 | abi_ulong mapped_addr; |
31e31b8a FB |
1073 | struct elf_phdr * elf_ppnt; |
1074 | struct elf_phdr *elf_phdata; | |
992f48a0 | 1075 | abi_ulong elf_bss, k, elf_brk; |
31e31b8a FB |
1076 | int retval; |
1077 | char * elf_interpreter; | |
992f48a0 | 1078 | abi_ulong elf_entry, interp_load_addr = 0; |
31e31b8a | 1079 | int status; |
992f48a0 BS |
1080 | abi_ulong start_code, end_code, start_data, end_data; |
1081 | abi_ulong reloc_func_desc = 0; | |
1082 | abi_ulong elf_stack; | |
31e31b8a FB |
1083 | char passed_fileno[6]; |
1084 | ||
1085 | ibcs2_interpreter = 0; | |
1086 | status = 0; | |
1087 | load_addr = 0; | |
09bfb054 | 1088 | load_bias = 0; |
31e31b8a FB |
1089 | elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
1090 | #ifdef BSWAP_NEEDED | |
1091 | bswap_ehdr(&elf_ex); | |
1092 | #endif | |
1093 | ||
31e31b8a FB |
1094 | /* First of all, some simple consistency checks */ |
1095 | if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) || | |
1096 | (! elf_check_arch(elf_ex.e_machine))) { | |
1097 | return -ENOEXEC; | |
1098 | } | |
1099 | ||
e5fe0c52 PB |
1100 | bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p); |
1101 | bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); | |
1102 | bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); | |
1103 | if (!bprm->p) { | |
1104 | retval = -E2BIG; | |
1105 | } | |
1106 | ||
31e31b8a | 1107 | /* Now read in all of the header information */ |
31e31b8a FB |
1108 | elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum); |
1109 | if (elf_phdata == NULL) { | |
1110 | return -ENOMEM; | |
1111 | } | |
1112 | ||
1113 | retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); | |
1114 | if(retval > 0) { | |
5fafdf24 | 1115 | retval = read(bprm->fd, (char *) elf_phdata, |
31e31b8a FB |
1116 | elf_ex.e_phentsize * elf_ex.e_phnum); |
1117 | } | |
1118 | ||
1119 | if (retval < 0) { | |
1120 | perror("load_elf_binary"); | |
1121 | exit(-1); | |
1122 | free (elf_phdata); | |
1123 | return -errno; | |
1124 | } | |
1125 | ||
b17780d5 FB |
1126 | #ifdef BSWAP_NEEDED |
1127 | elf_ppnt = elf_phdata; | |
1128 | for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { | |
1129 | bswap_phdr(elf_ppnt); | |
1130 | } | |
1131 | #endif | |
31e31b8a FB |
1132 | elf_ppnt = elf_phdata; |
1133 | ||
1134 | elf_bss = 0; | |
1135 | elf_brk = 0; | |
1136 | ||
1137 | ||
992f48a0 | 1138 | elf_stack = ~((abi_ulong)0UL); |
31e31b8a | 1139 | elf_interpreter = NULL; |
992f48a0 | 1140 | start_code = ~((abi_ulong)0UL); |
31e31b8a | 1141 | end_code = 0; |
863cf0b7 | 1142 | start_data = 0; |
31e31b8a FB |
1143 | end_data = 0; |
1144 | ||
1145 | for(i=0;i < elf_ex.e_phnum; i++) { | |
1146 | if (elf_ppnt->p_type == PT_INTERP) { | |
1147 | if ( elf_interpreter != NULL ) | |
1148 | { | |
1149 | free (elf_phdata); | |
1150 | free(elf_interpreter); | |
1151 | close(bprm->fd); | |
1152 | return -EINVAL; | |
1153 | } | |
1154 | ||
1155 | /* This is the program interpreter used for | |
1156 | * shared libraries - for now assume that this | |
1157 | * is an a.out format binary | |
1158 | */ | |
1159 | ||
32ce6337 | 1160 | elf_interpreter = (char *)malloc(elf_ppnt->p_filesz); |
31e31b8a FB |
1161 | |
1162 | if (elf_interpreter == NULL) { | |
1163 | free (elf_phdata); | |
1164 | close(bprm->fd); | |
1165 | return -ENOMEM; | |
1166 | } | |
1167 | ||
31e31b8a FB |
1168 | retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
1169 | if(retval >= 0) { | |
32ce6337 | 1170 | retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
31e31b8a FB |
1171 | } |
1172 | if(retval < 0) { | |
1173 | perror("load_elf_binary2"); | |
1174 | exit(-1); | |
5fafdf24 | 1175 | } |
31e31b8a FB |
1176 | |
1177 | /* If the program interpreter is one of these two, | |
1178 | then assume an iBCS2 image. Otherwise assume | |
1179 | a native linux image. */ | |
1180 | ||
1181 | /* JRP - Need to add X86 lib dir stuff here... */ | |
1182 | ||
1183 | if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || | |
1184 | strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { | |
1185 | ibcs2_interpreter = 1; | |
1186 | } | |
1187 | ||
1188 | #if 0 | |
1189 | printf("Using ELF interpreter %s\n", elf_interpreter); | |
1190 | #endif | |
1191 | if (retval >= 0) { | |
32ce6337 | 1192 | retval = open(path(elf_interpreter), O_RDONLY); |
31e31b8a FB |
1193 | if(retval >= 0) { |
1194 | interpreter_fd = retval; | |
1195 | } | |
1196 | else { | |
1197 | perror(elf_interpreter); | |
1198 | exit(-1); | |
1199 | /* retval = -errno; */ | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | if (retval >= 0) { | |
1204 | retval = lseek(interpreter_fd, 0, SEEK_SET); | |
1205 | if(retval >= 0) { | |
1206 | retval = read(interpreter_fd,bprm->buf,128); | |
1207 | } | |
1208 | } | |
1209 | if (retval >= 0) { | |
1210 | interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ | |
1211 | interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */ | |
1212 | } | |
1213 | if (retval < 0) { | |
1214 | perror("load_elf_binary3"); | |
1215 | exit(-1); | |
1216 | free (elf_phdata); | |
1217 | free(elf_interpreter); | |
1218 | close(bprm->fd); | |
1219 | return retval; | |
1220 | } | |
1221 | } | |
1222 | elf_ppnt++; | |
1223 | } | |
1224 | ||
1225 | /* Some simple consistency checks for the interpreter */ | |
1226 | if (elf_interpreter){ | |
1227 | interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; | |
1228 | ||
1229 | /* Now figure out which format our binary is */ | |
1230 | if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) && | |
1231 | (N_MAGIC(interp_ex) != QMAGIC)) { | |
1232 | interpreter_type = INTERPRETER_ELF; | |
1233 | } | |
1234 | ||
1235 | if (interp_elf_ex.e_ident[0] != 0x7f || | |
1236 | strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) { | |
1237 | interpreter_type &= ~INTERPRETER_ELF; | |
1238 | } | |
1239 | ||
1240 | if (!interpreter_type) { | |
1241 | free(elf_interpreter); | |
1242 | free(elf_phdata); | |
1243 | close(bprm->fd); | |
1244 | return -ELIBBAD; | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /* OK, we are done with that, now set up the arg stuff, | |
1249 | and then start this sucker up */ | |
1250 | ||
e5fe0c52 | 1251 | { |
31e31b8a FB |
1252 | char * passed_p; |
1253 | ||
1254 | if (interpreter_type == INTERPRETER_AOUT) { | |
eba2af63 | 1255 | snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
31e31b8a FB |
1256 | passed_p = passed_fileno; |
1257 | ||
1258 | if (elf_interpreter) { | |
e5fe0c52 | 1259 | bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p); |
31e31b8a FB |
1260 | bprm->argc++; |
1261 | } | |
1262 | } | |
1263 | if (!bprm->p) { | |
1264 | if (elf_interpreter) { | |
1265 | free(elf_interpreter); | |
1266 | } | |
1267 | free (elf_phdata); | |
1268 | close(bprm->fd); | |
1269 | return -E2BIG; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* OK, This is the point of no return */ | |
1274 | info->end_data = 0; | |
1275 | info->end_code = 0; | |
992f48a0 | 1276 | info->start_mmap = (abi_ulong)ELF_START_MMAP; |
31e31b8a | 1277 | info->mmap = 0; |
992f48a0 | 1278 | elf_entry = (abi_ulong) elf_ex.e_entry; |
31e31b8a FB |
1279 | |
1280 | /* Do this so that we can load the interpreter, if need be. We will | |
1281 | change some of these later */ | |
1282 | info->rss = 0; | |
1283 | bprm->p = setup_arg_pages(bprm->p, bprm, info); | |
1284 | info->start_stack = bprm->p; | |
1285 | ||
1286 | /* Now we do a little grungy work by mmaping the ELF image into | |
1287 | * the correct location in memory. At this point, we assume that | |
1288 | * the image should be loaded at fixed address, not at a variable | |
1289 | * address. | |
1290 | */ | |
1291 | ||
31e31b8a | 1292 | for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
09bfb054 FB |
1293 | int elf_prot = 0; |
1294 | int elf_flags = 0; | |
992f48a0 | 1295 | abi_ulong error; |
3b46e624 | 1296 | |
09bfb054 FB |
1297 | if (elf_ppnt->p_type != PT_LOAD) |
1298 | continue; | |
3b46e624 | 1299 | |
09bfb054 FB |
1300 | if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ; |
1301 | if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1302 | if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1303 | elf_flags = MAP_PRIVATE | MAP_DENYWRITE; | |
1304 | if (elf_ex.e_type == ET_EXEC || load_addr_set) { | |
1305 | elf_flags |= MAP_FIXED; | |
1306 | } else if (elf_ex.e_type == ET_DYN) { | |
1307 | /* Try and get dynamic programs out of the way of the default mmap | |
1308 | base, as well as whatever program they might try to exec. This | |
1309 | is because the brk will follow the loader, and is not movable. */ | |
1310 | /* NOTE: for qemu, we do a big mmap to get enough space | |
e91c8a77 | 1311 | without hardcoding any address */ |
54936004 | 1312 | error = target_mmap(0, ET_DYN_MAP_SIZE, |
5fafdf24 | 1313 | PROT_NONE, MAP_PRIVATE | MAP_ANON, |
54936004 | 1314 | -1, 0); |
09bfb054 FB |
1315 | if (error == -1) { |
1316 | perror("mmap"); | |
1317 | exit(-1); | |
1318 | } | |
54936004 | 1319 | load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
09bfb054 | 1320 | } |
3b46e624 | 1321 | |
54936004 FB |
1322 | error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1323 | (elf_ppnt->p_filesz + | |
1324 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), | |
1325 | elf_prot, | |
1326 | (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), | |
1327 | bprm->fd, | |
5fafdf24 | 1328 | (elf_ppnt->p_offset - |
54936004 | 1329 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
09bfb054 FB |
1330 | if (error == -1) { |
1331 | perror("mmap"); | |
1332 | exit(-1); | |
1333 | } | |
31e31b8a FB |
1334 | |
1335 | #ifdef LOW_ELF_STACK | |
54936004 FB |
1336 | if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack) |
1337 | elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); | |
31e31b8a | 1338 | #endif |
3b46e624 | 1339 | |
09bfb054 FB |
1340 | if (!load_addr_set) { |
1341 | load_addr_set = 1; | |
1342 | load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; | |
1343 | if (elf_ex.e_type == ET_DYN) { | |
1344 | load_bias += error - | |
54936004 | 1345 | TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
09bfb054 | 1346 | load_addr += load_bias; |
84409ddb | 1347 | reloc_func_desc = load_bias; |
09bfb054 FB |
1348 | } |
1349 | } | |
1350 | k = elf_ppnt->p_vaddr; | |
5fafdf24 | 1351 | if (k < start_code) |
09bfb054 | 1352 | start_code = k; |
863cf0b7 JM |
1353 | if (start_data < k) |
1354 | start_data = k; | |
09bfb054 | 1355 | k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
5fafdf24 | 1356 | if (k > elf_bss) |
09bfb054 FB |
1357 | elf_bss = k; |
1358 | if ((elf_ppnt->p_flags & PF_X) && end_code < k) | |
1359 | end_code = k; | |
5fafdf24 | 1360 | if (end_data < k) |
09bfb054 FB |
1361 | end_data = k; |
1362 | k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; | |
1363 | if (k > elf_brk) elf_brk = k; | |
31e31b8a FB |
1364 | } |
1365 | ||
09bfb054 FB |
1366 | elf_entry += load_bias; |
1367 | elf_bss += load_bias; | |
1368 | elf_brk += load_bias; | |
1369 | start_code += load_bias; | |
1370 | end_code += load_bias; | |
863cf0b7 | 1371 | start_data += load_bias; |
09bfb054 FB |
1372 | end_data += load_bias; |
1373 | ||
31e31b8a FB |
1374 | if (elf_interpreter) { |
1375 | if (interpreter_type & 1) { | |
1376 | elf_entry = load_aout_interp(&interp_ex, interpreter_fd); | |
1377 | } | |
1378 | else if (interpreter_type & 2) { | |
1379 | elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, | |
1380 | &interp_load_addr); | |
1381 | } | |
84409ddb | 1382 | reloc_func_desc = interp_load_addr; |
31e31b8a FB |
1383 | |
1384 | close(interpreter_fd); | |
1385 | free(elf_interpreter); | |
1386 | ||
992f48a0 | 1387 | if (elf_entry == ~((abi_ulong)0UL)) { |
31e31b8a FB |
1388 | printf("Unable to load interpreter\n"); |
1389 | free(elf_phdata); | |
1390 | exit(-1); | |
1391 | return 0; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | free(elf_phdata); | |
1396 | ||
689f936f FB |
1397 | if (loglevel) |
1398 | load_symbols(&elf_ex, bprm->fd); | |
1399 | ||
31e31b8a FB |
1400 | if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd); |
1401 | info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); | |
1402 | ||
1403 | #ifdef LOW_ELF_STACK | |
1404 | info->start_stack = bprm->p = elf_stack - 4; | |
1405 | #endif | |
53a5960a | 1406 | bprm->p = create_elf_tables(bprm->p, |
31e31b8a FB |
1407 | bprm->argc, |
1408 | bprm->envc, | |
a1516e92 | 1409 | &elf_ex, |
09bfb054 | 1410 | load_addr, load_bias, |
31e31b8a FB |
1411 | interp_load_addr, |
1412 | (interpreter_type == INTERPRETER_AOUT ? 0 : 1), | |
1413 | info); | |
92a343da | 1414 | info->load_addr = reloc_func_desc; |
31e31b8a FB |
1415 | info->start_brk = info->brk = elf_brk; |
1416 | info->end_code = end_code; | |
1417 | info->start_code = start_code; | |
863cf0b7 | 1418 | info->start_data = start_data; |
31e31b8a FB |
1419 | info->end_data = end_data; |
1420 | info->start_stack = bprm->p; | |
1421 | ||
1422 | /* Calling set_brk effectively mmaps the pages that we need for the bss and break | |
1423 | sections */ | |
1424 | set_brk(elf_bss, elf_brk); | |
1425 | ||
768a4a36 | 1426 | padzero(elf_bss, elf_brk); |
31e31b8a FB |
1427 | |
1428 | #if 0 | |
1429 | printf("(start_brk) %x\n" , info->start_brk); | |
1430 | printf("(end_code) %x\n" , info->end_code); | |
1431 | printf("(start_code) %x\n" , info->start_code); | |
1432 | printf("(end_data) %x\n" , info->end_data); | |
1433 | printf("(start_stack) %x\n" , info->start_stack); | |
1434 | printf("(brk) %x\n" , info->brk); | |
1435 | #endif | |
1436 | ||
1437 | if ( info->personality == PER_SVR4 ) | |
1438 | { | |
1439 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, | |
1440 | and some applications "depend" upon this behavior. | |
1441 | Since we do not have the power to recompile these, we | |
1442 | emulate the SVr4 behavior. Sigh. */ | |
83fb7adf | 1443 | mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, |
54936004 | 1444 | MAP_FIXED | MAP_PRIVATE, -1, 0); |
31e31b8a FB |
1445 | } |
1446 | ||
31e31b8a FB |
1447 | info->entry = elf_entry; |
1448 | ||
1449 | return 0; | |
1450 | } | |
1451 | ||
31e31b8a FB |
1452 | static int load_aout_interp(void * exptr, int interp_fd) |
1453 | { | |
1454 | printf("a.out interpreter not yet supported\n"); | |
1455 | return(0); | |
1456 | } | |
1457 | ||
e5fe0c52 PB |
1458 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
1459 | { | |
1460 | init_thread(regs, infop); | |
1461 | } |