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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> | |
6 | #include <sys/stat.h> | |
7 | #include <errno.h> | |
8 | #include <unistd.h> | |
9 | #include <sys/mman.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | ||
3ef693a0 | 13 | #include "qemu.h" |
689f936f | 14 | #include "disas.h" |
31e31b8a | 15 | |
30ac07d4 FB |
16 | #ifdef TARGET_I386 |
17 | ||
18 | #define ELF_START_MMAP 0x80000000 | |
19 | ||
30ac07d4 FB |
20 | /* |
21 | * This is used to ensure we don't load something for the wrong architecture. | |
22 | */ | |
23 | #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) | |
24 | ||
25 | /* | |
26 | * These are used to set parameters in the core dumps. | |
27 | */ | |
28 | #define ELF_CLASS ELFCLASS32 | |
29 | #define ELF_DATA ELFDATA2LSB | |
30 | #define ELF_ARCH EM_386 | |
31 | ||
32 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
33 | starts %edx contains a pointer to a function which might be | |
34 | registered using `atexit'. This provides a mean for the | |
35 | dynamic linker to call DT_FINI functions for shared libraries | |
36 | that have been loaded before the code runs. | |
37 | ||
38 | A value of 0 tells we have no such handler. */ | |
39 | #define ELF_PLAT_INIT(_r) _r->edx = 0 | |
40 | ||
b346ff46 FB |
41 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
42 | { | |
43 | regs->esp = infop->start_stack; | |
44 | regs->eip = infop->entry; | |
45 | } | |
46 | ||
47 | #define USE_ELF_CORE_DUMP | |
48 | #define ELF_EXEC_PAGESIZE 4096 | |
49 | ||
50 | #endif | |
51 | ||
52 | #ifdef TARGET_ARM | |
53 | ||
54 | #define ELF_START_MMAP 0x80000000 | |
55 | ||
56 | #define elf_check_arch(x) ( (x) == EM_ARM ) | |
57 | ||
58 | #define ELF_CLASS ELFCLASS32 | |
59 | #ifdef TARGET_WORDS_BIGENDIAN | |
60 | #define ELF_DATA ELFDATA2MSB | |
61 | #else | |
62 | #define ELF_DATA ELFDATA2LSB | |
63 | #endif | |
64 | #define ELF_ARCH EM_ARM | |
65 | ||
66 | #define ELF_PLAT_INIT(_r) _r->ARM_r0 = 0 | |
67 | ||
68 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
69 | { | |
70 | target_long *stack = (void *)infop->start_stack; | |
71 | memset(regs, 0, sizeof(*regs)); | |
72 | regs->ARM_cpsr = 0x10; | |
73 | regs->ARM_pc = infop->entry; | |
74 | regs->ARM_sp = infop->start_stack; | |
75 | regs->ARM_r2 = tswapl(stack[2]); /* envp */ | |
76 | regs->ARM_r1 = tswapl(stack[1]); /* argv */ | |
a1516e92 FB |
77 | /* XXX: it seems that r0 is zeroed after ! */ |
78 | // regs->ARM_r0 = tswapl(stack[0]); /* argc */ | |
b346ff46 FB |
79 | } |
80 | ||
30ac07d4 FB |
81 | #define USE_ELF_CORE_DUMP |
82 | #define ELF_EXEC_PAGESIZE 4096 | |
83 | ||
84 | #endif | |
85 | ||
853d6f7a FB |
86 | #ifdef TARGET_SPARC |
87 | ||
88 | #define ELF_START_MMAP 0x80000000 | |
89 | ||
90 | #define elf_check_arch(x) ( (x) == EM_SPARC ) | |
91 | ||
92 | #define ELF_CLASS ELFCLASS32 | |
93 | #define ELF_DATA ELFDATA2MSB | |
94 | #define ELF_ARCH EM_SPARC | |
95 | ||
96 | /*XXX*/ | |
97 | #define ELF_PLAT_INIT(_r) | |
98 | ||
99 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
100 | { | |
101 | regs->u_regs[0] = infop->entry; | |
102 | regs->u_regs[1] = infop->start_stack; | |
103 | } | |
104 | ||
105 | #endif | |
106 | ||
31e31b8a | 107 | #include "elf.h" |
09bfb054 FB |
108 | |
109 | /* | |
110 | * MAX_ARG_PAGES defines the number of pages allocated for arguments | |
111 | * and envelope for the new program. 32 should suffice, this gives | |
112 | * a maximum env+arg of 128kB w/4KB pages! | |
113 | */ | |
114 | #define MAX_ARG_PAGES 32 | |
115 | ||
116 | /* | |
117 | * This structure is used to hold the arguments that are | |
118 | * used when loading binaries. | |
119 | */ | |
120 | struct linux_binprm { | |
121 | char buf[128]; | |
122 | unsigned long page[MAX_ARG_PAGES]; | |
123 | unsigned long p; | |
124 | int sh_bang; | |
125 | int fd; | |
126 | int e_uid, e_gid; | |
127 | int argc, envc; | |
09bfb054 FB |
128 | char * filename; /* Name of binary */ |
129 | unsigned long loader, exec; | |
130 | int dont_iput; /* binfmt handler has put inode */ | |
131 | }; | |
132 | ||
133 | struct exec | |
134 | { | |
135 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ | |
136 | unsigned int a_text; /* length of text, in bytes */ | |
137 | unsigned int a_data; /* length of data, in bytes */ | |
138 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
139 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
140 | unsigned int a_entry; /* start address */ | |
141 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
142 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
143 | }; | |
144 | ||
145 | ||
146 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
147 | #define OMAGIC 0407 | |
148 | #define NMAGIC 0410 | |
149 | #define ZMAGIC 0413 | |
150 | #define QMAGIC 0314 | |
151 | ||
09bfb054 FB |
152 | /* max code+data+bss space allocated to elf interpreter */ |
153 | #define INTERP_MAP_SIZE (32 * 1024 * 1024) | |
154 | ||
155 | /* max code+data+bss+brk space allocated to ET_DYN executables */ | |
156 | #define ET_DYN_MAP_SIZE (128 * 1024 * 1024) | |
157 | ||
158 | /* from personality.h */ | |
159 | ||
160 | /* Flags for bug emulation. These occupy the top three bytes. */ | |
161 | #define STICKY_TIMEOUTS 0x4000000 | |
162 | #define WHOLE_SECONDS 0x2000000 | |
163 | ||
164 | /* Personality types. These go in the low byte. Avoid using the top bit, | |
165 | * it will conflict with error returns. | |
166 | */ | |
167 | #define PER_MASK (0x00ff) | |
168 | #define PER_LINUX (0x0000) | |
169 | #define PER_SVR4 (0x0001 | STICKY_TIMEOUTS) | |
170 | #define PER_SVR3 (0x0002 | STICKY_TIMEOUTS) | |
171 | #define PER_SCOSVR3 (0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS) | |
172 | #define PER_WYSEV386 (0x0004 | STICKY_TIMEOUTS) | |
173 | #define PER_ISCR4 (0x0005 | STICKY_TIMEOUTS) | |
174 | #define PER_BSD (0x0006) | |
175 | #define PER_XENIX (0x0007 | STICKY_TIMEOUTS) | |
31e31b8a FB |
176 | |
177 | /* Necessary parameters */ | |
31e31b8a FB |
178 | #define NGROUPS 32 |
179 | ||
54936004 FB |
180 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE |
181 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) | |
182 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) | |
31e31b8a FB |
183 | |
184 | #define INTERPRETER_NONE 0 | |
185 | #define INTERPRETER_AOUT 1 | |
186 | #define INTERPRETER_ELF 2 | |
187 | ||
188 | #define DLINFO_ITEMS 12 | |
189 | ||
09bfb054 FB |
190 | #define put_user(x,ptr) (void)(*(ptr) = (typeof(*ptr))(x)) |
191 | #define get_user(ptr) (typeof(*ptr))(*(ptr)) | |
192 | ||
193 | static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) | |
194 | { | |
195 | memcpy(to, from, n); | |
196 | } | |
d691f669 | 197 | |
09bfb054 FB |
198 | static inline void memcpy_tofs(void * to, const void * from, unsigned long n) |
199 | { | |
200 | memcpy(to, from, n); | |
201 | } | |
31e31b8a | 202 | |
31e31b8a FB |
203 | extern unsigned long x86_stack_size; |
204 | ||
205 | static int load_aout_interp(void * exptr, int interp_fd); | |
206 | ||
207 | #ifdef BSWAP_NEEDED | |
208 | static void bswap_ehdr(Elf32_Ehdr *ehdr) | |
209 | { | |
210 | bswap16s(&ehdr->e_type); /* Object file type */ | |
211 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
212 | bswap32s(&ehdr->e_version); /* Object file version */ | |
213 | bswap32s(&ehdr->e_entry); /* Entry point virtual address */ | |
214 | bswap32s(&ehdr->e_phoff); /* Program header table file offset */ | |
215 | bswap32s(&ehdr->e_shoff); /* Section header table file offset */ | |
216 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ | |
217 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
218 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
219 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
220 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
221 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
222 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
223 | } | |
224 | ||
225 | static void bswap_phdr(Elf32_Phdr *phdr) | |
226 | { | |
227 | bswap32s(&phdr->p_type); /* Segment type */ | |
228 | bswap32s(&phdr->p_offset); /* Segment file offset */ | |
229 | bswap32s(&phdr->p_vaddr); /* Segment virtual address */ | |
230 | bswap32s(&phdr->p_paddr); /* Segment physical address */ | |
231 | bswap32s(&phdr->p_filesz); /* Segment size in file */ | |
232 | bswap32s(&phdr->p_memsz); /* Segment size in memory */ | |
233 | bswap32s(&phdr->p_flags); /* Segment flags */ | |
234 | bswap32s(&phdr->p_align); /* Segment alignment */ | |
235 | } | |
689f936f FB |
236 | |
237 | static void bswap_shdr(Elf32_Shdr *shdr) | |
238 | { | |
239 | bswap32s(&shdr->sh_name); | |
240 | bswap32s(&shdr->sh_type); | |
241 | bswap32s(&shdr->sh_flags); | |
242 | bswap32s(&shdr->sh_addr); | |
243 | bswap32s(&shdr->sh_offset); | |
244 | bswap32s(&shdr->sh_size); | |
245 | bswap32s(&shdr->sh_link); | |
246 | bswap32s(&shdr->sh_info); | |
247 | bswap32s(&shdr->sh_addralign); | |
248 | bswap32s(&shdr->sh_entsize); | |
249 | } | |
250 | ||
251 | static void bswap_sym(Elf32_Sym *sym) | |
252 | { | |
253 | bswap32s(&sym->st_name); | |
254 | bswap32s(&sym->st_value); | |
255 | bswap32s(&sym->st_size); | |
256 | bswap16s(&sym->st_shndx); | |
257 | } | |
31e31b8a FB |
258 | #endif |
259 | ||
260 | static void * get_free_page(void) | |
261 | { | |
262 | void * retval; | |
263 | ||
264 | /* User-space version of kernel get_free_page. Returns a page-aligned | |
265 | * page-sized chunk of memory. | |
266 | */ | |
54936004 FB |
267 | retval = (void *)target_mmap(0, host_page_size, PROT_READ|PROT_WRITE, |
268 | MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
31e31b8a FB |
269 | |
270 | if((long)retval == -1) { | |
271 | perror("get_free_page"); | |
272 | exit(-1); | |
273 | } | |
274 | else { | |
275 | return(retval); | |
276 | } | |
277 | } | |
278 | ||
279 | static void free_page(void * pageaddr) | |
280 | { | |
54936004 | 281 | target_munmap((unsigned long)pageaddr, host_page_size); |
31e31b8a FB |
282 | } |
283 | ||
284 | /* | |
285 | * 'copy_string()' copies argument/envelope strings from user | |
286 | * memory to free pages in kernel mem. These are in a format ready | |
287 | * to be put directly into the top of new user memory. | |
288 | * | |
289 | */ | |
290 | static unsigned long copy_strings(int argc,char ** argv,unsigned long *page, | |
291 | unsigned long p) | |
292 | { | |
293 | char *tmp, *tmp1, *pag = NULL; | |
294 | int len, offset = 0; | |
295 | ||
296 | if (!p) { | |
297 | return 0; /* bullet-proofing */ | |
298 | } | |
299 | while (argc-- > 0) { | |
300 | if (!(tmp1 = tmp = get_user(argv+argc))) { | |
301 | fprintf(stderr, "VFS: argc is wrong"); | |
302 | exit(-1); | |
303 | } | |
304 | while (get_user(tmp++)); | |
305 | len = tmp - tmp1; | |
306 | if (p < len) { /* this shouldn't happen - 128kB */ | |
307 | return 0; | |
308 | } | |
309 | while (len) { | |
310 | --p; --tmp; --len; | |
311 | if (--offset < 0) { | |
54936004 FB |
312 | offset = p % TARGET_PAGE_SIZE; |
313 | if (!(pag = (char *) page[p/TARGET_PAGE_SIZE]) && | |
314 | !(pag = (char *) page[p/TARGET_PAGE_SIZE] = | |
31e31b8a FB |
315 | (unsigned long *) get_free_page())) { |
316 | return 0; | |
317 | } | |
318 | } | |
319 | if (len == 0 || offset == 0) { | |
320 | *(pag + offset) = get_user(tmp); | |
321 | } | |
322 | else { | |
323 | int bytes_to_copy = (len > offset) ? offset : len; | |
324 | tmp -= bytes_to_copy; | |
325 | p -= bytes_to_copy; | |
326 | offset -= bytes_to_copy; | |
327 | len -= bytes_to_copy; | |
328 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
329 | } | |
330 | } | |
331 | } | |
332 | return p; | |
333 | } | |
334 | ||
335 | static int in_group_p(gid_t g) | |
336 | { | |
337 | /* return TRUE if we're in the specified group, FALSE otherwise */ | |
338 | int ngroup; | |
339 | int i; | |
340 | gid_t grouplist[NGROUPS]; | |
341 | ||
342 | ngroup = getgroups(NGROUPS, grouplist); | |
343 | for(i = 0; i < ngroup; i++) { | |
344 | if(grouplist[i] == g) { | |
345 | return 1; | |
346 | } | |
347 | } | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static int count(char ** vec) | |
352 | { | |
353 | int i; | |
354 | ||
355 | for(i = 0; *vec; i++) { | |
356 | vec++; | |
357 | } | |
358 | ||
359 | return(i); | |
360 | } | |
361 | ||
362 | static int prepare_binprm(struct linux_binprm *bprm) | |
363 | { | |
364 | struct stat st; | |
365 | int mode; | |
366 | int retval, id_change; | |
367 | ||
368 | if(fstat(bprm->fd, &st) < 0) { | |
369 | return(-errno); | |
370 | } | |
371 | ||
372 | mode = st.st_mode; | |
373 | if(!S_ISREG(mode)) { /* Must be regular file */ | |
374 | return(-EACCES); | |
375 | } | |
376 | if(!(mode & 0111)) { /* Must have at least one execute bit set */ | |
377 | return(-EACCES); | |
378 | } | |
379 | ||
380 | bprm->e_uid = geteuid(); | |
381 | bprm->e_gid = getegid(); | |
382 | id_change = 0; | |
383 | ||
384 | /* Set-uid? */ | |
385 | if(mode & S_ISUID) { | |
386 | bprm->e_uid = st.st_uid; | |
387 | if(bprm->e_uid != geteuid()) { | |
388 | id_change = 1; | |
389 | } | |
390 | } | |
391 | ||
392 | /* Set-gid? */ | |
393 | /* | |
394 | * If setgid is set but no group execute bit then this | |
395 | * is a candidate for mandatory locking, not a setgid | |
396 | * executable. | |
397 | */ | |
398 | if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { | |
399 | bprm->e_gid = st.st_gid; | |
400 | if (!in_group_p(bprm->e_gid)) { | |
401 | id_change = 1; | |
402 | } | |
403 | } | |
404 | ||
405 | memset(bprm->buf, 0, sizeof(bprm->buf)); | |
406 | retval = lseek(bprm->fd, 0L, SEEK_SET); | |
407 | if(retval >= 0) { | |
408 | retval = read(bprm->fd, bprm->buf, 128); | |
409 | } | |
410 | if(retval < 0) { | |
411 | perror("prepare_binprm"); | |
412 | exit(-1); | |
413 | /* return(-errno); */ | |
414 | } | |
415 | else { | |
416 | return(retval); | |
417 | } | |
418 | } | |
419 | ||
420 | unsigned long setup_arg_pages(unsigned long p, struct linux_binprm * bprm, | |
421 | struct image_info * info) | |
422 | { | |
09bfb054 | 423 | unsigned long stack_base, size, error; |
31e31b8a | 424 | int i; |
31e31b8a | 425 | |
09bfb054 FB |
426 | /* Create enough stack to hold everything. If we don't use |
427 | * it for args, we'll use it for something else... | |
428 | */ | |
429 | size = x86_stack_size; | |
54936004 FB |
430 | if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) |
431 | size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; | |
432 | error = target_mmap(0, | |
433 | size + host_page_size, | |
434 | PROT_READ | PROT_WRITE, | |
435 | MAP_PRIVATE | MAP_ANONYMOUS, | |
436 | -1, 0); | |
09bfb054 FB |
437 | if (error == -1) { |
438 | perror("stk mmap"); | |
439 | exit(-1); | |
440 | } | |
441 | /* we reserve one extra page at the top of the stack as guard */ | |
54936004 | 442 | target_mprotect(error + size, host_page_size, PROT_NONE); |
31e31b8a | 443 | |
54936004 | 444 | stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
31e31b8a | 445 | p += stack_base; |
09bfb054 | 446 | |
31e31b8a FB |
447 | if (bprm->loader) { |
448 | bprm->loader += stack_base; | |
449 | } | |
450 | bprm->exec += stack_base; | |
451 | ||
31e31b8a FB |
452 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
453 | if (bprm->page[i]) { | |
454 | info->rss++; | |
455 | ||
54936004 | 456 | memcpy((void *)stack_base, (void *)bprm->page[i], TARGET_PAGE_SIZE); |
31e31b8a FB |
457 | free_page((void *)bprm->page[i]); |
458 | } | |
54936004 | 459 | stack_base += TARGET_PAGE_SIZE; |
31e31b8a FB |
460 | } |
461 | return p; | |
462 | } | |
463 | ||
464 | static void set_brk(unsigned long start, unsigned long end) | |
465 | { | |
466 | /* page-align the start and end addresses... */ | |
54936004 FB |
467 | start = HOST_PAGE_ALIGN(start); |
468 | end = HOST_PAGE_ALIGN(end); | |
31e31b8a FB |
469 | if (end <= start) |
470 | return; | |
54936004 FB |
471 | if(target_mmap(start, end - start, |
472 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
473 | MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { | |
31e31b8a FB |
474 | perror("cannot mmap brk"); |
475 | exit(-1); | |
476 | } | |
477 | } | |
478 | ||
479 | ||
853d6f7a FB |
480 | /* We need to explicitly zero any fractional pages after the data |
481 | section (i.e. bss). This would contain the junk from the file that | |
482 | should not be in memory. */ | |
31e31b8a FB |
483 | static void padzero(unsigned long elf_bss) |
484 | { | |
485 | unsigned long nbyte; | |
486 | char * fpnt; | |
487 | ||
853d6f7a FB |
488 | /* XXX: this is really a hack : if the real host page size is |
489 | smaller than the target page size, some pages after the end | |
490 | of the file may not be mapped. A better fix would be to | |
491 | patch target_mmap(), but it is more complicated as the file | |
492 | size must be known */ | |
493 | if (real_host_page_size < host_page_size) { | |
494 | unsigned long end_addr, end_addr1; | |
495 | end_addr1 = (elf_bss + real_host_page_size - 1) & | |
496 | ~(real_host_page_size - 1); | |
497 | end_addr = HOST_PAGE_ALIGN(elf_bss); | |
498 | if (end_addr1 < end_addr) { | |
499 | mmap((void *)end_addr1, end_addr - end_addr1, | |
500 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
501 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
502 | } | |
503 | } | |
504 | ||
505 | nbyte = elf_bss & (host_page_size-1); | |
31e31b8a | 506 | if (nbyte) { |
54936004 | 507 | nbyte = host_page_size - nbyte; |
31e31b8a FB |
508 | fpnt = (char *) elf_bss; |
509 | do { | |
510 | *fpnt++ = 0; | |
511 | } while (--nbyte); | |
512 | } | |
513 | } | |
514 | ||
515 | static unsigned int * create_elf_tables(char *p, int argc, int envc, | |
09bfb054 FB |
516 | struct elfhdr * exec, |
517 | unsigned long load_addr, | |
518 | unsigned long load_bias, | |
519 | unsigned long interp_load_addr, int ibcs, | |
520 | struct image_info *info) | |
31e31b8a | 521 | { |
b17780d5 FB |
522 | target_ulong *argv, *envp, *dlinfo; |
523 | target_ulong *sp; | |
31e31b8a FB |
524 | |
525 | /* | |
526 | * Force 16 byte alignment here for generality. | |
527 | */ | |
528 | sp = (unsigned int *) (~15UL & (unsigned long) p); | |
a1516e92 | 529 | sp -= DLINFO_ITEMS*2; |
31e31b8a FB |
530 | dlinfo = sp; |
531 | sp -= envc+1; | |
532 | envp = sp; | |
533 | sp -= argc+1; | |
534 | argv = sp; | |
535 | if (!ibcs) { | |
b17780d5 FB |
536 | put_user(tswapl((target_ulong)envp),--sp); |
537 | put_user(tswapl((target_ulong)argv),--sp); | |
31e31b8a | 538 | } |
31e31b8a FB |
539 | |
540 | #define NEW_AUX_ENT(id, val) \ | |
b17780d5 FB |
541 | put_user (tswapl(id), dlinfo++); \ |
542 | put_user (tswapl(val), dlinfo++) | |
31e31b8a | 543 | |
a1516e92 FB |
544 | NEW_AUX_ENT (AT_PHDR, (target_ulong)(load_addr + exec->e_phoff)); |
545 | NEW_AUX_ENT (AT_PHENT, (target_ulong)(sizeof (struct elf_phdr))); | |
546 | NEW_AUX_ENT (AT_PHNUM, (target_ulong)(exec->e_phnum)); | |
547 | NEW_AUX_ENT (AT_PAGESZ, (target_ulong)(TARGET_PAGE_SIZE)); | |
548 | NEW_AUX_ENT (AT_BASE, (target_ulong)(interp_load_addr)); | |
549 | NEW_AUX_ENT (AT_FLAGS, (target_ulong)0); | |
550 | NEW_AUX_ENT (AT_ENTRY, load_bias + exec->e_entry); | |
551 | NEW_AUX_ENT (AT_UID, (target_ulong) getuid()); | |
552 | NEW_AUX_ENT (AT_EUID, (target_ulong) geteuid()); | |
553 | NEW_AUX_ENT (AT_GID, (target_ulong) getgid()); | |
554 | NEW_AUX_ENT (AT_EGID, (target_ulong) getegid()); | |
31e31b8a FB |
555 | NEW_AUX_ENT (AT_NULL, 0); |
556 | #undef NEW_AUX_ENT | |
a1516e92 | 557 | |
b17780d5 | 558 | put_user(tswapl(argc),--sp); |
31e31b8a FB |
559 | info->arg_start = (unsigned int)((unsigned long)p & 0xffffffff); |
560 | while (argc-->0) { | |
b17780d5 | 561 | put_user(tswapl((target_ulong)p),argv++); |
31e31b8a FB |
562 | while (get_user(p++)) /* nothing */ ; |
563 | } | |
564 | put_user(0,argv); | |
565 | info->arg_end = info->env_start = (unsigned int)((unsigned long)p & 0xffffffff); | |
31e31b8a | 566 | while (envc-->0) { |
b17780d5 | 567 | put_user(tswapl((target_ulong)p),envp++); |
31e31b8a FB |
568 | while (get_user(p++)) /* nothing */ ; |
569 | } | |
570 | put_user(0,envp); | |
31e31b8a FB |
571 | info->env_end = (unsigned int)((unsigned long)p & 0xffffffff); |
572 | return sp; | |
573 | } | |
574 | ||
575 | ||
576 | ||
577 | static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, | |
578 | int interpreter_fd, | |
579 | unsigned long *interp_load_addr) | |
580 | { | |
581 | struct elf_phdr *elf_phdata = NULL; | |
582 | struct elf_phdr *eppnt; | |
09bfb054 | 583 | unsigned long load_addr = 0; |
31e31b8a FB |
584 | int load_addr_set = 0; |
585 | int retval; | |
586 | unsigned long last_bss, elf_bss; | |
587 | unsigned long error; | |
588 | int i; | |
589 | ||
590 | elf_bss = 0; | |
591 | last_bss = 0; | |
592 | error = 0; | |
593 | ||
644c433c FB |
594 | #ifdef BSWAP_NEEDED |
595 | bswap_ehdr(interp_elf_ex); | |
596 | #endif | |
31e31b8a FB |
597 | /* First of all, some simple consistency checks */ |
598 | if ((interp_elf_ex->e_type != ET_EXEC && | |
09bfb054 | 599 | interp_elf_ex->e_type != ET_DYN) || |
31e31b8a FB |
600 | !elf_check_arch(interp_elf_ex->e_machine)) { |
601 | return ~0UL; | |
602 | } | |
603 | ||
644c433c | 604 | |
31e31b8a FB |
605 | /* Now read in all of the header information */ |
606 | ||
54936004 | 607 | if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
31e31b8a FB |
608 | return ~0UL; |
609 | ||
610 | elf_phdata = (struct elf_phdr *) | |
611 | malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
612 | ||
613 | if (!elf_phdata) | |
614 | return ~0UL; | |
615 | ||
616 | /* | |
617 | * If the size of this structure has changed, then punt, since | |
618 | * we will be doing the wrong thing. | |
619 | */ | |
09bfb054 | 620 | if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
31e31b8a FB |
621 | free(elf_phdata); |
622 | return ~0UL; | |
09bfb054 | 623 | } |
31e31b8a FB |
624 | |
625 | retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); | |
626 | if(retval >= 0) { | |
627 | retval = read(interpreter_fd, | |
628 | (char *) elf_phdata, | |
629 | sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
630 | } | |
31e31b8a FB |
631 | if (retval < 0) { |
632 | perror("load_elf_interp"); | |
633 | exit(-1); | |
634 | free (elf_phdata); | |
635 | return retval; | |
636 | } | |
637 | #ifdef BSWAP_NEEDED | |
638 | eppnt = elf_phdata; | |
639 | for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { | |
640 | bswap_phdr(eppnt); | |
641 | } | |
642 | #endif | |
09bfb054 FB |
643 | |
644 | if (interp_elf_ex->e_type == ET_DYN) { | |
645 | /* in order to avoid harcoding the interpreter load | |
646 | address in qemu, we allocate a big enough memory zone */ | |
54936004 FB |
647 | error = target_mmap(0, INTERP_MAP_SIZE, |
648 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
649 | -1, 0); | |
09bfb054 FB |
650 | if (error == -1) { |
651 | perror("mmap"); | |
652 | exit(-1); | |
653 | } | |
654 | load_addr = error; | |
655 | load_addr_set = 1; | |
656 | } | |
657 | ||
31e31b8a FB |
658 | eppnt = elf_phdata; |
659 | for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) | |
660 | if (eppnt->p_type == PT_LOAD) { | |
661 | int elf_type = MAP_PRIVATE | MAP_DENYWRITE; | |
662 | int elf_prot = 0; | |
663 | unsigned long vaddr = 0; | |
664 | unsigned long k; | |
665 | ||
666 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
667 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
668 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
669 | if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) { | |
670 | elf_type |= MAP_FIXED; | |
671 | vaddr = eppnt->p_vaddr; | |
672 | } | |
54936004 FB |
673 | error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
674 | eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), | |
31e31b8a FB |
675 | elf_prot, |
676 | elf_type, | |
677 | interpreter_fd, | |
54936004 | 678 | eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
31e31b8a FB |
679 | |
680 | if (error > -1024UL) { | |
681 | /* Real error */ | |
682 | close(interpreter_fd); | |
683 | free(elf_phdata); | |
684 | return ~0UL; | |
685 | } | |
686 | ||
687 | if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { | |
688 | load_addr = error; | |
689 | load_addr_set = 1; | |
690 | } | |
691 | ||
692 | /* | |
693 | * Find the end of the file mapping for this phdr, and keep | |
694 | * track of the largest address we see for this. | |
695 | */ | |
696 | k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; | |
697 | if (k > elf_bss) elf_bss = k; | |
698 | ||
699 | /* | |
700 | * Do the same thing for the memory mapping - between | |
701 | * elf_bss and last_bss is the bss section. | |
702 | */ | |
703 | k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; | |
704 | if (k > last_bss) last_bss = k; | |
705 | } | |
706 | ||
707 | /* Now use mmap to map the library into memory. */ | |
708 | ||
709 | close(interpreter_fd); | |
710 | ||
711 | /* | |
712 | * Now fill out the bss section. First pad the last page up | |
713 | * to the page boundary, and then perform a mmap to make sure | |
714 | * that there are zeromapped pages up to and including the last | |
715 | * bss page. | |
716 | */ | |
717 | padzero(elf_bss); | |
54936004 | 718 | elf_bss = TARGET_ELF_PAGESTART(elf_bss + host_page_size - 1); /* What we have mapped so far */ |
31e31b8a FB |
719 | |
720 | /* Map the last of the bss segment */ | |
721 | if (last_bss > elf_bss) { | |
54936004 FB |
722 | target_mmap(elf_bss, last_bss-elf_bss, |
723 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
724 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
31e31b8a FB |
725 | } |
726 | free(elf_phdata); | |
727 | ||
728 | *interp_load_addr = load_addr; | |
729 | return ((unsigned long) interp_elf_ex->e_entry) + load_addr; | |
730 | } | |
731 | ||
689f936f FB |
732 | /* Best attempt to load symbols from this ELF object. */ |
733 | static void load_symbols(struct elfhdr *hdr, int fd) | |
734 | { | |
735 | unsigned int i; | |
736 | struct elf_shdr sechdr, symtab, strtab; | |
737 | char *strings; | |
738 | ||
739 | lseek(fd, hdr->e_shoff, SEEK_SET); | |
740 | for (i = 0; i < hdr->e_shnum; i++) { | |
741 | if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) | |
742 | return; | |
743 | #ifdef BSWAP_NEEDED | |
744 | bswap_shdr(&sechdr); | |
745 | #endif | |
746 | if (sechdr.sh_type == SHT_SYMTAB) { | |
747 | symtab = sechdr; | |
748 | lseek(fd, hdr->e_shoff | |
749 | + sizeof(sechdr) * sechdr.sh_link, SEEK_SET); | |
750 | if (read(fd, &strtab, sizeof(strtab)) | |
751 | != sizeof(strtab)) | |
752 | return; | |
753 | #ifdef BSWAP_NEEDED | |
754 | bswap_shdr(&strtab); | |
755 | #endif | |
756 | goto found; | |
757 | } | |
758 | } | |
759 | return; /* Shouldn't happen... */ | |
760 | ||
761 | found: | |
762 | /* Now know where the strtab and symtab are. Snarf them. */ | |
763 | disas_symtab = malloc(symtab.sh_size); | |
764 | disas_strtab = strings = malloc(strtab.sh_size); | |
765 | if (!disas_symtab || !disas_strtab) | |
766 | return; | |
767 | ||
768 | lseek(fd, symtab.sh_offset, SEEK_SET); | |
769 | if (read(fd, disas_symtab, symtab.sh_size) != symtab.sh_size) | |
770 | return; | |
31e31b8a | 771 | |
689f936f FB |
772 | #ifdef BSWAP_NEEDED |
773 | for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++) | |
774 | bswap_sym(disas_symtab + sizeof(struct elf_sym)*i); | |
775 | #endif | |
776 | ||
777 | lseek(fd, strtab.sh_offset, SEEK_SET); | |
778 | if (read(fd, strings, strtab.sh_size) != strtab.sh_size) | |
779 | return; | |
780 | disas_num_syms = symtab.sh_size / sizeof(struct elf_sym); | |
781 | } | |
31e31b8a | 782 | |
b17780d5 FB |
783 | static int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
784 | struct image_info * info) | |
31e31b8a FB |
785 | { |
786 | struct elfhdr elf_ex; | |
787 | struct elfhdr interp_elf_ex; | |
788 | struct exec interp_ex; | |
789 | int interpreter_fd = -1; /* avoid warning */ | |
09bfb054 | 790 | unsigned long load_addr, load_bias; |
31e31b8a FB |
791 | int load_addr_set = 0; |
792 | unsigned int interpreter_type = INTERPRETER_NONE; | |
793 | unsigned char ibcs2_interpreter; | |
794 | int i; | |
54936004 | 795 | unsigned long mapped_addr; |
31e31b8a FB |
796 | struct elf_phdr * elf_ppnt; |
797 | struct elf_phdr *elf_phdata; | |
798 | unsigned long elf_bss, k, elf_brk; | |
799 | int retval; | |
800 | char * elf_interpreter; | |
801 | unsigned long elf_entry, interp_load_addr = 0; | |
802 | int status; | |
803 | unsigned long start_code, end_code, end_data; | |
804 | unsigned long elf_stack; | |
805 | char passed_fileno[6]; | |
806 | ||
807 | ibcs2_interpreter = 0; | |
808 | status = 0; | |
809 | load_addr = 0; | |
09bfb054 | 810 | load_bias = 0; |
31e31b8a FB |
811 | elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
812 | #ifdef BSWAP_NEEDED | |
813 | bswap_ehdr(&elf_ex); | |
814 | #endif | |
815 | ||
816 | if (elf_ex.e_ident[0] != 0x7f || | |
817 | strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) { | |
818 | return -ENOEXEC; | |
819 | } | |
820 | ||
31e31b8a FB |
821 | /* First of all, some simple consistency checks */ |
822 | if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) || | |
823 | (! elf_check_arch(elf_ex.e_machine))) { | |
824 | return -ENOEXEC; | |
825 | } | |
826 | ||
827 | /* Now read in all of the header information */ | |
31e31b8a FB |
828 | elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum); |
829 | if (elf_phdata == NULL) { | |
830 | return -ENOMEM; | |
831 | } | |
832 | ||
833 | retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); | |
834 | if(retval > 0) { | |
835 | retval = read(bprm->fd, (char *) elf_phdata, | |
836 | elf_ex.e_phentsize * elf_ex.e_phnum); | |
837 | } | |
838 | ||
839 | if (retval < 0) { | |
840 | perror("load_elf_binary"); | |
841 | exit(-1); | |
842 | free (elf_phdata); | |
843 | return -errno; | |
844 | } | |
845 | ||
b17780d5 FB |
846 | #ifdef BSWAP_NEEDED |
847 | elf_ppnt = elf_phdata; | |
848 | for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { | |
849 | bswap_phdr(elf_ppnt); | |
850 | } | |
851 | #endif | |
31e31b8a FB |
852 | elf_ppnt = elf_phdata; |
853 | ||
854 | elf_bss = 0; | |
855 | elf_brk = 0; | |
856 | ||
857 | ||
858 | elf_stack = ~0UL; | |
859 | elf_interpreter = NULL; | |
860 | start_code = ~0UL; | |
861 | end_code = 0; | |
862 | end_data = 0; | |
863 | ||
864 | for(i=0;i < elf_ex.e_phnum; i++) { | |
865 | if (elf_ppnt->p_type == PT_INTERP) { | |
866 | if ( elf_interpreter != NULL ) | |
867 | { | |
868 | free (elf_phdata); | |
869 | free(elf_interpreter); | |
870 | close(bprm->fd); | |
871 | return -EINVAL; | |
872 | } | |
873 | ||
874 | /* This is the program interpreter used for | |
875 | * shared libraries - for now assume that this | |
876 | * is an a.out format binary | |
877 | */ | |
878 | ||
32ce6337 | 879 | elf_interpreter = (char *)malloc(elf_ppnt->p_filesz); |
31e31b8a FB |
880 | |
881 | if (elf_interpreter == NULL) { | |
882 | free (elf_phdata); | |
883 | close(bprm->fd); | |
884 | return -ENOMEM; | |
885 | } | |
886 | ||
31e31b8a FB |
887 | retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
888 | if(retval >= 0) { | |
32ce6337 | 889 | retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
31e31b8a FB |
890 | } |
891 | if(retval < 0) { | |
892 | perror("load_elf_binary2"); | |
893 | exit(-1); | |
894 | } | |
895 | ||
896 | /* If the program interpreter is one of these two, | |
897 | then assume an iBCS2 image. Otherwise assume | |
898 | a native linux image. */ | |
899 | ||
900 | /* JRP - Need to add X86 lib dir stuff here... */ | |
901 | ||
902 | if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || | |
903 | strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { | |
904 | ibcs2_interpreter = 1; | |
905 | } | |
906 | ||
907 | #if 0 | |
908 | printf("Using ELF interpreter %s\n", elf_interpreter); | |
909 | #endif | |
910 | if (retval >= 0) { | |
32ce6337 | 911 | retval = open(path(elf_interpreter), O_RDONLY); |
31e31b8a FB |
912 | if(retval >= 0) { |
913 | interpreter_fd = retval; | |
914 | } | |
915 | else { | |
916 | perror(elf_interpreter); | |
917 | exit(-1); | |
918 | /* retval = -errno; */ | |
919 | } | |
920 | } | |
921 | ||
922 | if (retval >= 0) { | |
923 | retval = lseek(interpreter_fd, 0, SEEK_SET); | |
924 | if(retval >= 0) { | |
925 | retval = read(interpreter_fd,bprm->buf,128); | |
926 | } | |
927 | } | |
928 | if (retval >= 0) { | |
929 | interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ | |
930 | interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */ | |
931 | } | |
932 | if (retval < 0) { | |
933 | perror("load_elf_binary3"); | |
934 | exit(-1); | |
935 | free (elf_phdata); | |
936 | free(elf_interpreter); | |
937 | close(bprm->fd); | |
938 | return retval; | |
939 | } | |
940 | } | |
941 | elf_ppnt++; | |
942 | } | |
943 | ||
944 | /* Some simple consistency checks for the interpreter */ | |
945 | if (elf_interpreter){ | |
946 | interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; | |
947 | ||
948 | /* Now figure out which format our binary is */ | |
949 | if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) && | |
950 | (N_MAGIC(interp_ex) != QMAGIC)) { | |
951 | interpreter_type = INTERPRETER_ELF; | |
952 | } | |
953 | ||
954 | if (interp_elf_ex.e_ident[0] != 0x7f || | |
955 | strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) { | |
956 | interpreter_type &= ~INTERPRETER_ELF; | |
957 | } | |
958 | ||
959 | if (!interpreter_type) { | |
960 | free(elf_interpreter); | |
961 | free(elf_phdata); | |
962 | close(bprm->fd); | |
963 | return -ELIBBAD; | |
964 | } | |
965 | } | |
966 | ||
967 | /* OK, we are done with that, now set up the arg stuff, | |
968 | and then start this sucker up */ | |
969 | ||
970 | if (!bprm->sh_bang) { | |
971 | char * passed_p; | |
972 | ||
973 | if (interpreter_type == INTERPRETER_AOUT) { | |
974 | sprintf(passed_fileno, "%d", bprm->fd); | |
975 | passed_p = passed_fileno; | |
976 | ||
977 | if (elf_interpreter) { | |
978 | bprm->p = copy_strings(1,&passed_p,bprm->page,bprm->p); | |
979 | bprm->argc++; | |
980 | } | |
981 | } | |
982 | if (!bprm->p) { | |
983 | if (elf_interpreter) { | |
984 | free(elf_interpreter); | |
985 | } | |
986 | free (elf_phdata); | |
987 | close(bprm->fd); | |
988 | return -E2BIG; | |
989 | } | |
990 | } | |
991 | ||
992 | /* OK, This is the point of no return */ | |
993 | info->end_data = 0; | |
994 | info->end_code = 0; | |
995 | info->start_mmap = (unsigned long)ELF_START_MMAP; | |
996 | info->mmap = 0; | |
997 | elf_entry = (unsigned long) elf_ex.e_entry; | |
998 | ||
999 | /* Do this so that we can load the interpreter, if need be. We will | |
1000 | change some of these later */ | |
1001 | info->rss = 0; | |
1002 | bprm->p = setup_arg_pages(bprm->p, bprm, info); | |
1003 | info->start_stack = bprm->p; | |
1004 | ||
1005 | /* Now we do a little grungy work by mmaping the ELF image into | |
1006 | * the correct location in memory. At this point, we assume that | |
1007 | * the image should be loaded at fixed address, not at a variable | |
1008 | * address. | |
1009 | */ | |
1010 | ||
31e31b8a | 1011 | for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
09bfb054 FB |
1012 | int elf_prot = 0; |
1013 | int elf_flags = 0; | |
1014 | unsigned long error; | |
1015 | ||
1016 | if (elf_ppnt->p_type != PT_LOAD) | |
1017 | continue; | |
1018 | ||
1019 | if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ; | |
1020 | if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1021 | if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1022 | elf_flags = MAP_PRIVATE | MAP_DENYWRITE; | |
1023 | if (elf_ex.e_type == ET_EXEC || load_addr_set) { | |
1024 | elf_flags |= MAP_FIXED; | |
1025 | } else if (elf_ex.e_type == ET_DYN) { | |
1026 | /* Try and get dynamic programs out of the way of the default mmap | |
1027 | base, as well as whatever program they might try to exec. This | |
1028 | is because the brk will follow the loader, and is not movable. */ | |
1029 | /* NOTE: for qemu, we do a big mmap to get enough space | |
1030 | without harcoding any address */ | |
54936004 FB |
1031 | error = target_mmap(0, ET_DYN_MAP_SIZE, |
1032 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
1033 | -1, 0); | |
09bfb054 FB |
1034 | if (error == -1) { |
1035 | perror("mmap"); | |
1036 | exit(-1); | |
1037 | } | |
54936004 | 1038 | load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
09bfb054 FB |
1039 | } |
1040 | ||
54936004 FB |
1041 | error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1042 | (elf_ppnt->p_filesz + | |
1043 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), | |
1044 | elf_prot, | |
1045 | (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), | |
1046 | bprm->fd, | |
1047 | (elf_ppnt->p_offset - | |
1048 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); | |
09bfb054 FB |
1049 | if (error == -1) { |
1050 | perror("mmap"); | |
1051 | exit(-1); | |
1052 | } | |
31e31b8a FB |
1053 | |
1054 | #ifdef LOW_ELF_STACK | |
54936004 FB |
1055 | if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack) |
1056 | elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); | |
31e31b8a | 1057 | #endif |
09bfb054 FB |
1058 | |
1059 | if (!load_addr_set) { | |
1060 | load_addr_set = 1; | |
1061 | load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; | |
1062 | if (elf_ex.e_type == ET_DYN) { | |
1063 | load_bias += error - | |
54936004 | 1064 | TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
09bfb054 FB |
1065 | load_addr += load_bias; |
1066 | } | |
1067 | } | |
1068 | k = elf_ppnt->p_vaddr; | |
1069 | if (k < start_code) | |
1070 | start_code = k; | |
1071 | k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; | |
1072 | if (k > elf_bss) | |
1073 | elf_bss = k; | |
1074 | if ((elf_ppnt->p_flags & PF_X) && end_code < k) | |
1075 | end_code = k; | |
1076 | if (end_data < k) | |
1077 | end_data = k; | |
1078 | k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; | |
1079 | if (k > elf_brk) elf_brk = k; | |
31e31b8a FB |
1080 | } |
1081 | ||
09bfb054 FB |
1082 | elf_entry += load_bias; |
1083 | elf_bss += load_bias; | |
1084 | elf_brk += load_bias; | |
1085 | start_code += load_bias; | |
1086 | end_code += load_bias; | |
1087 | // start_data += load_bias; | |
1088 | end_data += load_bias; | |
1089 | ||
31e31b8a FB |
1090 | if (elf_interpreter) { |
1091 | if (interpreter_type & 1) { | |
1092 | elf_entry = load_aout_interp(&interp_ex, interpreter_fd); | |
1093 | } | |
1094 | else if (interpreter_type & 2) { | |
1095 | elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, | |
1096 | &interp_load_addr); | |
1097 | } | |
1098 | ||
1099 | close(interpreter_fd); | |
1100 | free(elf_interpreter); | |
1101 | ||
1102 | if (elf_entry == ~0UL) { | |
1103 | printf("Unable to load interpreter\n"); | |
1104 | free(elf_phdata); | |
1105 | exit(-1); | |
1106 | return 0; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | free(elf_phdata); | |
1111 | ||
689f936f FB |
1112 | if (loglevel) |
1113 | load_symbols(&elf_ex, bprm->fd); | |
1114 | ||
31e31b8a FB |
1115 | if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd); |
1116 | info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); | |
1117 | ||
1118 | #ifdef LOW_ELF_STACK | |
1119 | info->start_stack = bprm->p = elf_stack - 4; | |
1120 | #endif | |
1121 | bprm->p = (unsigned long) | |
1122 | create_elf_tables((char *)bprm->p, | |
1123 | bprm->argc, | |
1124 | bprm->envc, | |
a1516e92 | 1125 | &elf_ex, |
09bfb054 | 1126 | load_addr, load_bias, |
31e31b8a FB |
1127 | interp_load_addr, |
1128 | (interpreter_type == INTERPRETER_AOUT ? 0 : 1), | |
1129 | info); | |
1130 | if (interpreter_type == INTERPRETER_AOUT) | |
1131 | info->arg_start += strlen(passed_fileno) + 1; | |
1132 | info->start_brk = info->brk = elf_brk; | |
1133 | info->end_code = end_code; | |
1134 | info->start_code = start_code; | |
1135 | info->end_data = end_data; | |
1136 | info->start_stack = bprm->p; | |
1137 | ||
1138 | /* Calling set_brk effectively mmaps the pages that we need for the bss and break | |
1139 | sections */ | |
1140 | set_brk(elf_bss, elf_brk); | |
1141 | ||
1142 | padzero(elf_bss); | |
1143 | ||
1144 | #if 0 | |
1145 | printf("(start_brk) %x\n" , info->start_brk); | |
1146 | printf("(end_code) %x\n" , info->end_code); | |
1147 | printf("(start_code) %x\n" , info->start_code); | |
1148 | printf("(end_data) %x\n" , info->end_data); | |
1149 | printf("(start_stack) %x\n" , info->start_stack); | |
1150 | printf("(brk) %x\n" , info->brk); | |
1151 | #endif | |
1152 | ||
1153 | if ( info->personality == PER_SVR4 ) | |
1154 | { | |
1155 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, | |
1156 | and some applications "depend" upon this behavior. | |
1157 | Since we do not have the power to recompile these, we | |
1158 | emulate the SVr4 behavior. Sigh. */ | |
54936004 FB |
1159 | mapped_addr = target_mmap(0, host_page_size, PROT_READ | PROT_EXEC, |
1160 | MAP_FIXED | MAP_PRIVATE, -1, 0); | |
31e31b8a FB |
1161 | } |
1162 | ||
1163 | #ifdef ELF_PLAT_INIT | |
1164 | /* | |
1165 | * The ABI may specify that certain registers be set up in special | |
1166 | * ways (on i386 %edx is the address of a DT_FINI function, for | |
1167 | * example. This macro performs whatever initialization to | |
1168 | * the regs structure is required. | |
1169 | */ | |
1170 | ELF_PLAT_INIT(regs); | |
1171 | #endif | |
1172 | ||
1173 | ||
1174 | info->entry = elf_entry; | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | ||
1180 | ||
32ce6337 | 1181 | int elf_exec(const char * filename, char ** argv, char ** envp, |
b17780d5 | 1182 | struct target_pt_regs * regs, struct image_info *infop) |
31e31b8a FB |
1183 | { |
1184 | struct linux_binprm bprm; | |
1185 | int retval; | |
1186 | int i; | |
1187 | ||
54936004 | 1188 | bprm.p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int); |
31e31b8a FB |
1189 | for (i=0 ; i<MAX_ARG_PAGES ; i++) /* clear page-table */ |
1190 | bprm.page[i] = 0; | |
1191 | retval = open(filename, O_RDONLY); | |
1192 | if (retval == -1) { | |
1193 | perror(filename); | |
1194 | exit(-1); | |
1195 | /* return retval; */ | |
1196 | } | |
1197 | else { | |
1198 | bprm.fd = retval; | |
1199 | } | |
1200 | bprm.filename = (char *)filename; | |
1201 | bprm.sh_bang = 0; | |
1202 | bprm.loader = 0; | |
1203 | bprm.exec = 0; | |
1204 | bprm.dont_iput = 0; | |
1205 | bprm.argc = count(argv); | |
1206 | bprm.envc = count(envp); | |
1207 | ||
1208 | retval = prepare_binprm(&bprm); | |
1209 | ||
1210 | if(retval>=0) { | |
1211 | bprm.p = copy_strings(1, &bprm.filename, bprm.page, bprm.p); | |
1212 | bprm.exec = bprm.p; | |
1213 | bprm.p = copy_strings(bprm.envc,envp,bprm.page,bprm.p); | |
1214 | bprm.p = copy_strings(bprm.argc,argv,bprm.page,bprm.p); | |
1215 | if (!bprm.p) { | |
1216 | retval = -E2BIG; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | if(retval>=0) { | |
1221 | retval = load_elf_binary(&bprm,regs,infop); | |
1222 | } | |
1223 | if(retval>=0) { | |
1224 | /* success. Initialize important registers */ | |
b346ff46 | 1225 | init_thread(regs, infop); |
31e31b8a FB |
1226 | return retval; |
1227 | } | |
1228 | ||
1229 | /* Something went wrong, return the inode and free the argument pages*/ | |
1230 | for (i=0 ; i<MAX_ARG_PAGES ; i++) { | |
1231 | free_page((void *)bprm.page[i]); | |
1232 | } | |
1233 | return(retval); | |
1234 | } | |
1235 | ||
1236 | ||
1237 | static int load_aout_interp(void * exptr, int interp_fd) | |
1238 | { | |
1239 | printf("a.out interpreter not yet supported\n"); | |
1240 | return(0); | |
1241 | } | |
1242 |