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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 | |
83fb7adf FB |
15 | /* this flag is uneffective under linux too, should be deleted */ |
16 | #ifndef MAP_DENYWRITE | |
17 | #define MAP_DENYWRITE 0 | |
18 | #endif | |
19 | ||
20 | /* should probably go in elf.h */ | |
21 | #ifndef ELIBBAD | |
22 | #define ELIBBAD 80 | |
23 | #endif | |
24 | ||
30ac07d4 FB |
25 | #ifdef TARGET_I386 |
26 | ||
15338fd7 FB |
27 | #define ELF_PLATFORM get_elf_platform() |
28 | ||
29 | static const char *get_elf_platform(void) | |
30 | { | |
31 | static char elf_platform[] = "i386"; | |
32 | int family = (global_env->cpuid_version >> 8) & 0xff; | |
33 | if (family > 6) | |
34 | family = 6; | |
35 | if (family >= 3) | |
36 | elf_platform[1] = '0' + family; | |
37 | return elf_platform; | |
38 | } | |
39 | ||
40 | #define ELF_HWCAP get_elf_hwcap() | |
41 | ||
42 | static uint32_t get_elf_hwcap(void) | |
43 | { | |
44 | return global_env->cpuid_features; | |
45 | } | |
46 | ||
30ac07d4 FB |
47 | #define ELF_START_MMAP 0x80000000 |
48 | ||
30ac07d4 FB |
49 | /* |
50 | * This is used to ensure we don't load something for the wrong architecture. | |
51 | */ | |
52 | #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) | |
53 | ||
54 | /* | |
55 | * These are used to set parameters in the core dumps. | |
56 | */ | |
57 | #define ELF_CLASS ELFCLASS32 | |
58 | #define ELF_DATA ELFDATA2LSB | |
59 | #define ELF_ARCH EM_386 | |
60 | ||
b346ff46 FB |
61 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
62 | { | |
63 | regs->esp = infop->start_stack; | |
64 | regs->eip = infop->entry; | |
e5fe0c52 PB |
65 | |
66 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
67 | starts %edx contains a pointer to a function which might be | |
68 | registered using `atexit'. This provides a mean for the | |
69 | dynamic linker to call DT_FINI functions for shared libraries | |
70 | that have been loaded before the code runs. | |
71 | ||
72 | A value of 0 tells we have no such handler. */ | |
73 | regs->edx = 0; | |
b346ff46 FB |
74 | } |
75 | ||
76 | #define USE_ELF_CORE_DUMP | |
77 | #define ELF_EXEC_PAGESIZE 4096 | |
78 | ||
79 | #endif | |
80 | ||
81 | #ifdef TARGET_ARM | |
82 | ||
83 | #define ELF_START_MMAP 0x80000000 | |
84 | ||
85 | #define elf_check_arch(x) ( (x) == EM_ARM ) | |
86 | ||
87 | #define ELF_CLASS ELFCLASS32 | |
88 | #ifdef TARGET_WORDS_BIGENDIAN | |
89 | #define ELF_DATA ELFDATA2MSB | |
90 | #else | |
91 | #define ELF_DATA ELFDATA2LSB | |
92 | #endif | |
93 | #define ELF_ARCH EM_ARM | |
94 | ||
b346ff46 FB |
95 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
96 | { | |
53a5960a | 97 | target_long stack = infop->start_stack; |
b346ff46 FB |
98 | memset(regs, 0, sizeof(*regs)); |
99 | regs->ARM_cpsr = 0x10; | |
0240ded8 PB |
100 | if (infop->entry & 1) |
101 | regs->ARM_cpsr |= CPSR_T; | |
102 | regs->ARM_pc = infop->entry & 0xfffffffe; | |
b346ff46 | 103 | regs->ARM_sp = infop->start_stack; |
53a5960a PB |
104 | regs->ARM_r2 = tgetl(stack + 8); /* envp */ |
105 | regs->ARM_r1 = tgetl(stack + 4); /* envp */ | |
a1516e92 | 106 | /* XXX: it seems that r0 is zeroed after ! */ |
e5fe0c52 PB |
107 | regs->ARM_r0 = 0; |
108 | /* For uClinux PIC binaries. */ | |
109 | regs->ARM_r10 = infop->start_data; | |
b346ff46 FB |
110 | } |
111 | ||
30ac07d4 FB |
112 | #define USE_ELF_CORE_DUMP |
113 | #define ELF_EXEC_PAGESIZE 4096 | |
114 | ||
afce2927 FB |
115 | enum |
116 | { | |
117 | ARM_HWCAP_ARM_SWP = 1 << 0, | |
118 | ARM_HWCAP_ARM_HALF = 1 << 1, | |
119 | ARM_HWCAP_ARM_THUMB = 1 << 2, | |
120 | ARM_HWCAP_ARM_26BIT = 1 << 3, | |
121 | ARM_HWCAP_ARM_FAST_MULT = 1 << 4, | |
122 | ARM_HWCAP_ARM_FPA = 1 << 5, | |
123 | ARM_HWCAP_ARM_VFP = 1 << 6, | |
124 | ARM_HWCAP_ARM_EDSP = 1 << 7, | |
125 | }; | |
126 | ||
15338fd7 | 127 | #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \ |
afce2927 FB |
128 | | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
129 | | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP) | |
130 | ||
30ac07d4 FB |
131 | #endif |
132 | ||
853d6f7a | 133 | #ifdef TARGET_SPARC |
a315a145 | 134 | #ifdef TARGET_SPARC64 |
853d6f7a FB |
135 | |
136 | #define ELF_START_MMAP 0x80000000 | |
137 | ||
5ef54116 | 138 | #define elf_check_arch(x) ( (x) == EM_SPARCV9 ) |
853d6f7a | 139 | |
a315a145 FB |
140 | #define ELF_CLASS ELFCLASS64 |
141 | #define ELF_DATA ELFDATA2MSB | |
5ef54116 FB |
142 | #define ELF_ARCH EM_SPARCV9 |
143 | ||
144 | #define STACK_BIAS 2047 | |
a315a145 | 145 | |
a315a145 FB |
146 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
147 | { | |
148 | regs->tstate = 0; | |
149 | regs->pc = infop->entry; | |
150 | regs->npc = regs->pc + 4; | |
151 | regs->y = 0; | |
5ef54116 | 152 | regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; |
a315a145 FB |
153 | } |
154 | ||
155 | #else | |
156 | #define ELF_START_MMAP 0x80000000 | |
157 | ||
158 | #define elf_check_arch(x) ( (x) == EM_SPARC ) | |
159 | ||
853d6f7a FB |
160 | #define ELF_CLASS ELFCLASS32 |
161 | #define ELF_DATA ELFDATA2MSB | |
162 | #define ELF_ARCH EM_SPARC | |
163 | ||
853d6f7a FB |
164 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
165 | { | |
f5155289 FB |
166 | regs->psr = 0; |
167 | regs->pc = infop->entry; | |
168 | regs->npc = regs->pc + 4; | |
169 | regs->y = 0; | |
170 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
853d6f7a FB |
171 | } |
172 | ||
a315a145 | 173 | #endif |
853d6f7a FB |
174 | #endif |
175 | ||
67867308 FB |
176 | #ifdef TARGET_PPC |
177 | ||
178 | #define ELF_START_MMAP 0x80000000 | |
179 | ||
180 | #define elf_check_arch(x) ( (x) == EM_PPC ) | |
181 | ||
182 | #define ELF_CLASS ELFCLASS32 | |
183 | #ifdef TARGET_WORDS_BIGENDIAN | |
184 | #define ELF_DATA ELFDATA2MSB | |
185 | #else | |
186 | #define ELF_DATA ELFDATA2LSB | |
187 | #endif | |
188 | #define ELF_ARCH EM_PPC | |
189 | ||
f5155289 FB |
190 | /* |
191 | * We need to put in some extra aux table entries to tell glibc what | |
192 | * the cache block size is, so it can use the dcbz instruction safely. | |
193 | */ | |
194 | #define AT_DCACHEBSIZE 19 | |
195 | #define AT_ICACHEBSIZE 20 | |
196 | #define AT_UCACHEBSIZE 21 | |
197 | /* A special ignored type value for PPC, for glibc compatibility. */ | |
198 | #define AT_IGNOREPPC 22 | |
199 | /* | |
200 | * The requirements here are: | |
201 | * - keep the final alignment of sp (sp & 0xf) | |
202 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
203 | * AUXV is greater than 16 for glibc compatibility. | |
204 | * AT_IGNOREPPC is used for that. | |
205 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
206 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
207 | */ | |
0bccf03d | 208 | #define DLINFO_ARCH_ITEMS 5 |
f5155289 FB |
209 | #define ARCH_DLINFO \ |
210 | do { \ | |
0bccf03d FB |
211 | NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \ |
212 | NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \ | |
213 | NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ | |
f5155289 FB |
214 | /* \ |
215 | * Now handle glibc compatibility. \ | |
216 | */ \ | |
0bccf03d FB |
217 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
218 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
f5155289 FB |
219 | } while (0) |
220 | ||
67867308 FB |
221 | static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
222 | { | |
e5fe0c52 PB |
223 | target_ulong pos = infop->start_stack; |
224 | target_ulong tmp; | |
225 | ||
67867308 FB |
226 | _regs->msr = 1 << MSR_PR; /* Set user mode */ |
227 | _regs->gpr[1] = infop->start_stack; | |
228 | _regs->nip = infop->entry; | |
e5fe0c52 PB |
229 | /* Note that isn't exactly what regular kernel does |
230 | * but this is what the ABI wants and is needed to allow | |
231 | * execution of PPC BSD programs. | |
232 | */ | |
233 | _regs->gpr[3] = tgetl(pos); | |
234 | pos += sizeof(target_ulong); | |
235 | _regs->gpr[4] = pos; | |
236 | for (tmp = 1; tmp != 0; pos += sizeof(target_ulong)) | |
237 | tmp = ldl(pos); | |
238 | _regs->gpr[5] = pos; | |
67867308 FB |
239 | } |
240 | ||
241 | #define USE_ELF_CORE_DUMP | |
242 | #define ELF_EXEC_PAGESIZE 4096 | |
243 | ||
244 | #endif | |
245 | ||
048f6b4d FB |
246 | #ifdef TARGET_MIPS |
247 | ||
248 | #define ELF_START_MMAP 0x80000000 | |
249 | ||
250 | #define elf_check_arch(x) ( (x) == EM_MIPS ) | |
251 | ||
252 | #define ELF_CLASS ELFCLASS32 | |
253 | #ifdef TARGET_WORDS_BIGENDIAN | |
254 | #define ELF_DATA ELFDATA2MSB | |
255 | #else | |
256 | #define ELF_DATA ELFDATA2LSB | |
257 | #endif | |
258 | #define ELF_ARCH EM_MIPS | |
259 | ||
048f6b4d FB |
260 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
261 | { | |
262 | regs->cp0_status = CP0St_UM; | |
263 | regs->cp0_epc = infop->entry; | |
264 | regs->regs[29] = infop->start_stack; | |
265 | } | |
266 | ||
267 | #endif /* TARGET_MIPS */ | |
268 | ||
fdf9b3e8 FB |
269 | #ifdef TARGET_SH4 |
270 | ||
271 | #define ELF_START_MMAP 0x80000000 | |
272 | ||
273 | #define elf_check_arch(x) ( (x) == EM_SH ) | |
274 | ||
275 | #define ELF_CLASS ELFCLASS32 | |
276 | #define ELF_DATA ELFDATA2LSB | |
277 | #define ELF_ARCH EM_SH | |
278 | ||
fdf9b3e8 FB |
279 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
280 | { | |
281 | /* Check other registers XXXXX */ | |
282 | regs->pc = infop->entry; | |
283 | regs->regs[15] = infop->start_stack - 16 * 4; | |
284 | } | |
285 | ||
286 | #define USE_ELF_CORE_DUMP | |
287 | #define ELF_EXEC_PAGESIZE 4096 | |
288 | ||
289 | #endif | |
290 | ||
15338fd7 FB |
291 | #ifndef ELF_PLATFORM |
292 | #define ELF_PLATFORM (NULL) | |
293 | #endif | |
294 | ||
295 | #ifndef ELF_HWCAP | |
296 | #define ELF_HWCAP 0 | |
297 | #endif | |
298 | ||
31e31b8a | 299 | #include "elf.h" |
09bfb054 | 300 | |
09bfb054 FB |
301 | struct exec |
302 | { | |
303 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ | |
304 | unsigned int a_text; /* length of text, in bytes */ | |
305 | unsigned int a_data; /* length of data, in bytes */ | |
306 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
307 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
308 | unsigned int a_entry; /* start address */ | |
309 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
310 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
311 | }; | |
312 | ||
313 | ||
314 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
315 | #define OMAGIC 0407 | |
316 | #define NMAGIC 0410 | |
317 | #define ZMAGIC 0413 | |
318 | #define QMAGIC 0314 | |
319 | ||
09bfb054 FB |
320 | /* max code+data+bss space allocated to elf interpreter */ |
321 | #define INTERP_MAP_SIZE (32 * 1024 * 1024) | |
322 | ||
323 | /* max code+data+bss+brk space allocated to ET_DYN executables */ | |
324 | #define ET_DYN_MAP_SIZE (128 * 1024 * 1024) | |
325 | ||
326 | /* from personality.h */ | |
327 | ||
328 | /* Flags for bug emulation. These occupy the top three bytes. */ | |
329 | #define STICKY_TIMEOUTS 0x4000000 | |
330 | #define WHOLE_SECONDS 0x2000000 | |
331 | ||
332 | /* Personality types. These go in the low byte. Avoid using the top bit, | |
333 | * it will conflict with error returns. | |
334 | */ | |
335 | #define PER_MASK (0x00ff) | |
336 | #define PER_LINUX (0x0000) | |
337 | #define PER_SVR4 (0x0001 | STICKY_TIMEOUTS) | |
338 | #define PER_SVR3 (0x0002 | STICKY_TIMEOUTS) | |
339 | #define PER_SCOSVR3 (0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS) | |
340 | #define PER_WYSEV386 (0x0004 | STICKY_TIMEOUTS) | |
341 | #define PER_ISCR4 (0x0005 | STICKY_TIMEOUTS) | |
342 | #define PER_BSD (0x0006) | |
343 | #define PER_XENIX (0x0007 | STICKY_TIMEOUTS) | |
31e31b8a FB |
344 | |
345 | /* Necessary parameters */ | |
54936004 FB |
346 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE |
347 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) | |
348 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) | |
31e31b8a FB |
349 | |
350 | #define INTERPRETER_NONE 0 | |
351 | #define INTERPRETER_AOUT 1 | |
352 | #define INTERPRETER_ELF 2 | |
353 | ||
15338fd7 | 354 | #define DLINFO_ITEMS 12 |
31e31b8a | 355 | |
09bfb054 FB |
356 | static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
357 | { | |
358 | memcpy(to, from, n); | |
359 | } | |
d691f669 | 360 | |
31e31b8a FB |
361 | extern unsigned long x86_stack_size; |
362 | ||
363 | static int load_aout_interp(void * exptr, int interp_fd); | |
364 | ||
365 | #ifdef BSWAP_NEEDED | |
92a31b1f | 366 | static void bswap_ehdr(struct elfhdr *ehdr) |
31e31b8a FB |
367 | { |
368 | bswap16s(&ehdr->e_type); /* Object file type */ | |
369 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
370 | bswap32s(&ehdr->e_version); /* Object file version */ | |
92a31b1f FB |
371 | bswaptls(&ehdr->e_entry); /* Entry point virtual address */ |
372 | bswaptls(&ehdr->e_phoff); /* Program header table file offset */ | |
373 | bswaptls(&ehdr->e_shoff); /* Section header table file offset */ | |
31e31b8a FB |
374 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ |
375 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
376 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
377 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
378 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
379 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
380 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
381 | } | |
382 | ||
92a31b1f | 383 | static void bswap_phdr(struct elf_phdr *phdr) |
31e31b8a FB |
384 | { |
385 | bswap32s(&phdr->p_type); /* Segment type */ | |
92a31b1f FB |
386 | bswaptls(&phdr->p_offset); /* Segment file offset */ |
387 | bswaptls(&phdr->p_vaddr); /* Segment virtual address */ | |
388 | bswaptls(&phdr->p_paddr); /* Segment physical address */ | |
389 | bswaptls(&phdr->p_filesz); /* Segment size in file */ | |
390 | bswaptls(&phdr->p_memsz); /* Segment size in memory */ | |
31e31b8a | 391 | bswap32s(&phdr->p_flags); /* Segment flags */ |
92a31b1f | 392 | bswaptls(&phdr->p_align); /* Segment alignment */ |
31e31b8a | 393 | } |
689f936f | 394 | |
92a31b1f | 395 | static void bswap_shdr(struct elf_shdr *shdr) |
689f936f FB |
396 | { |
397 | bswap32s(&shdr->sh_name); | |
398 | bswap32s(&shdr->sh_type); | |
92a31b1f FB |
399 | bswaptls(&shdr->sh_flags); |
400 | bswaptls(&shdr->sh_addr); | |
401 | bswaptls(&shdr->sh_offset); | |
402 | bswaptls(&shdr->sh_size); | |
689f936f FB |
403 | bswap32s(&shdr->sh_link); |
404 | bswap32s(&shdr->sh_info); | |
92a31b1f FB |
405 | bswaptls(&shdr->sh_addralign); |
406 | bswaptls(&shdr->sh_entsize); | |
689f936f FB |
407 | } |
408 | ||
409 | static void bswap_sym(Elf32_Sym *sym) | |
410 | { | |
411 | bswap32s(&sym->st_name); | |
412 | bswap32s(&sym->st_value); | |
413 | bswap32s(&sym->st_size); | |
414 | bswap16s(&sym->st_shndx); | |
415 | } | |
31e31b8a FB |
416 | #endif |
417 | ||
31e31b8a | 418 | /* |
e5fe0c52 | 419 | * 'copy_elf_strings()' copies argument/envelope strings from user |
31e31b8a FB |
420 | * memory to free pages in kernel mem. These are in a format ready |
421 | * to be put directly into the top of new user memory. | |
422 | * | |
423 | */ | |
e5fe0c52 PB |
424 | static unsigned long copy_elf_strings(int argc,char ** argv, void **page, |
425 | unsigned long p) | |
31e31b8a FB |
426 | { |
427 | char *tmp, *tmp1, *pag = NULL; | |
428 | int len, offset = 0; | |
429 | ||
430 | if (!p) { | |
431 | return 0; /* bullet-proofing */ | |
432 | } | |
433 | while (argc-- > 0) { | |
edf779ff FB |
434 | tmp = argv[argc]; |
435 | if (!tmp) { | |
31e31b8a FB |
436 | fprintf(stderr, "VFS: argc is wrong"); |
437 | exit(-1); | |
438 | } | |
edf779ff FB |
439 | tmp1 = tmp; |
440 | while (*tmp++); | |
31e31b8a FB |
441 | len = tmp - tmp1; |
442 | if (p < len) { /* this shouldn't happen - 128kB */ | |
443 | return 0; | |
444 | } | |
445 | while (len) { | |
446 | --p; --tmp; --len; | |
447 | if (--offset < 0) { | |
54936004 | 448 | offset = p % TARGET_PAGE_SIZE; |
53a5960a | 449 | pag = (char *)page[p/TARGET_PAGE_SIZE]; |
44a91cae | 450 | if (!pag) { |
53a5960a PB |
451 | pag = (char *)malloc(TARGET_PAGE_SIZE); |
452 | page[p/TARGET_PAGE_SIZE] = pag; | |
44a91cae FB |
453 | if (!pag) |
454 | return 0; | |
31e31b8a FB |
455 | } |
456 | } | |
457 | if (len == 0 || offset == 0) { | |
edf779ff | 458 | *(pag + offset) = *tmp; |
31e31b8a FB |
459 | } |
460 | else { | |
461 | int bytes_to_copy = (len > offset) ? offset : len; | |
462 | tmp -= bytes_to_copy; | |
463 | p -= bytes_to_copy; | |
464 | offset -= bytes_to_copy; | |
465 | len -= bytes_to_copy; | |
466 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
467 | } | |
468 | } | |
469 | } | |
470 | return p; | |
471 | } | |
472 | ||
53a5960a PB |
473 | unsigned long setup_arg_pages(target_ulong p, struct linux_binprm * bprm, |
474 | struct image_info * info) | |
475 | { | |
476 | target_ulong stack_base, size, error; | |
31e31b8a | 477 | int i; |
31e31b8a | 478 | |
09bfb054 FB |
479 | /* Create enough stack to hold everything. If we don't use |
480 | * it for args, we'll use it for something else... | |
481 | */ | |
482 | size = x86_stack_size; | |
54936004 FB |
483 | if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) |
484 | size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; | |
485 | error = target_mmap(0, | |
83fb7adf | 486 | size + qemu_host_page_size, |
54936004 FB |
487 | PROT_READ | PROT_WRITE, |
488 | MAP_PRIVATE | MAP_ANONYMOUS, | |
489 | -1, 0); | |
09bfb054 FB |
490 | if (error == -1) { |
491 | perror("stk mmap"); | |
492 | exit(-1); | |
493 | } | |
494 | /* we reserve one extra page at the top of the stack as guard */ | |
83fb7adf | 495 | target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
31e31b8a | 496 | |
54936004 | 497 | stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
31e31b8a | 498 | p += stack_base; |
09bfb054 | 499 | |
31e31b8a FB |
500 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
501 | if (bprm->page[i]) { | |
502 | info->rss++; | |
503 | ||
53a5960a PB |
504 | memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
505 | free(bprm->page[i]); | |
31e31b8a | 506 | } |
53a5960a | 507 | stack_base += TARGET_PAGE_SIZE; |
31e31b8a FB |
508 | } |
509 | return p; | |
510 | } | |
511 | ||
512 | static void set_brk(unsigned long start, unsigned long end) | |
513 | { | |
514 | /* page-align the start and end addresses... */ | |
54936004 FB |
515 | start = HOST_PAGE_ALIGN(start); |
516 | end = HOST_PAGE_ALIGN(end); | |
31e31b8a FB |
517 | if (end <= start) |
518 | return; | |
54936004 FB |
519 | if(target_mmap(start, end - start, |
520 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
521 | MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { | |
31e31b8a FB |
522 | perror("cannot mmap brk"); |
523 | exit(-1); | |
524 | } | |
525 | } | |
526 | ||
527 | ||
853d6f7a FB |
528 | /* We need to explicitly zero any fractional pages after the data |
529 | section (i.e. bss). This would contain the junk from the file that | |
530 | should not be in memory. */ | |
31e31b8a FB |
531 | static void padzero(unsigned long elf_bss) |
532 | { | |
533 | unsigned long nbyte; | |
31e31b8a | 534 | |
853d6f7a FB |
535 | /* XXX: this is really a hack : if the real host page size is |
536 | smaller than the target page size, some pages after the end | |
537 | of the file may not be mapped. A better fix would be to | |
538 | patch target_mmap(), but it is more complicated as the file | |
539 | size must be known */ | |
83fb7adf | 540 | if (qemu_real_host_page_size < qemu_host_page_size) { |
853d6f7a | 541 | unsigned long end_addr, end_addr1; |
83fb7adf FB |
542 | end_addr1 = (elf_bss + qemu_real_host_page_size - 1) & |
543 | ~(qemu_real_host_page_size - 1); | |
853d6f7a FB |
544 | end_addr = HOST_PAGE_ALIGN(elf_bss); |
545 | if (end_addr1 < end_addr) { | |
546 | mmap((void *)end_addr1, end_addr - end_addr1, | |
547 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
548 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
549 | } | |
550 | } | |
551 | ||
83fb7adf | 552 | nbyte = elf_bss & (qemu_host_page_size-1); |
31e31b8a | 553 | if (nbyte) { |
83fb7adf | 554 | nbyte = qemu_host_page_size - nbyte; |
31e31b8a | 555 | do { |
53a5960a PB |
556 | tput8(elf_bss, 0); |
557 | elf_bss++; | |
31e31b8a FB |
558 | } while (--nbyte); |
559 | } | |
560 | } | |
561 | ||
53a5960a PB |
562 | |
563 | static unsigned long create_elf_tables(target_ulong p, int argc, int envc, | |
564 | struct elfhdr * exec, | |
565 | unsigned long load_addr, | |
566 | unsigned long load_bias, | |
567 | unsigned long interp_load_addr, int ibcs, | |
568 | struct image_info *info) | |
31e31b8a | 569 | { |
53a5960a PB |
570 | target_ulong sp; |
571 | int size; | |
572 | target_ulong u_platform; | |
15338fd7 | 573 | const char *k_platform; |
53a5960a | 574 | const int n = sizeof(target_ulong); |
edf779ff | 575 | |
53a5960a PB |
576 | sp = p; |
577 | u_platform = 0; | |
15338fd7 FB |
578 | k_platform = ELF_PLATFORM; |
579 | if (k_platform) { | |
580 | size_t len = strlen(k_platform) + 1; | |
53a5960a PB |
581 | sp -= (len + n - 1) & ~(n - 1); |
582 | u_platform = sp; | |
583 | memcpy_to_target(sp, k_platform, len); | |
15338fd7 | 584 | } |
53a5960a PB |
585 | /* |
586 | * Force 16 byte _final_ alignment here for generality. | |
587 | */ | |
588 | sp = sp &~ (target_ulong)15; | |
589 | size = (DLINFO_ITEMS + 1) * 2; | |
15338fd7 | 590 | if (k_platform) |
53a5960a | 591 | size += 2; |
f5155289 | 592 | #ifdef DLINFO_ARCH_ITEMS |
53a5960a | 593 | size += DLINFO_ARCH_ITEMS * 2; |
f5155289 | 594 | #endif |
53a5960a PB |
595 | size += envc + argc + 2; |
596 | size += (!ibcs ? 3 : 1); /* argc itself */ | |
597 | size *= n; | |
598 | if (size & 15) | |
599 | sp -= 16 - (size & 15); | |
f5155289 | 600 | |
53a5960a PB |
601 | #define NEW_AUX_ENT(id, val) do { \ |
602 | sp -= n; tputl(sp, val); \ | |
603 | sp -= n; tputl(sp, id); \ | |
604 | } while(0) | |
0bccf03d FB |
605 | NEW_AUX_ENT (AT_NULL, 0); |
606 | ||
607 | /* There must be exactly DLINFO_ITEMS entries here. */ | |
608 | NEW_AUX_ENT(AT_PHDR, (target_ulong)(load_addr + exec->e_phoff)); | |
609 | NEW_AUX_ENT(AT_PHENT, (target_ulong)(sizeof (struct elf_phdr))); | |
610 | NEW_AUX_ENT(AT_PHNUM, (target_ulong)(exec->e_phnum)); | |
611 | NEW_AUX_ENT(AT_PAGESZ, (target_ulong)(TARGET_PAGE_SIZE)); | |
612 | NEW_AUX_ENT(AT_BASE, (target_ulong)(interp_load_addr)); | |
613 | NEW_AUX_ENT(AT_FLAGS, (target_ulong)0); | |
614 | NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); | |
615 | NEW_AUX_ENT(AT_UID, (target_ulong) getuid()); | |
616 | NEW_AUX_ENT(AT_EUID, (target_ulong) geteuid()); | |
617 | NEW_AUX_ENT(AT_GID, (target_ulong) getgid()); | |
618 | NEW_AUX_ENT(AT_EGID, (target_ulong) getegid()); | |
15338fd7 FB |
619 | NEW_AUX_ENT(AT_HWCAP, (target_ulong) ELF_HWCAP); |
620 | if (k_platform) | |
53a5960a | 621 | NEW_AUX_ENT(AT_PLATFORM, u_platform); |
f5155289 FB |
622 | #ifdef ARCH_DLINFO |
623 | /* | |
624 | * ARCH_DLINFO must come last so platform specific code can enforce | |
625 | * special alignment requirements on the AUXV if necessary (eg. PPC). | |
626 | */ | |
627 | ARCH_DLINFO; | |
628 | #endif | |
629 | #undef NEW_AUX_ENT | |
630 | ||
e5fe0c52 | 631 | sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
31e31b8a FB |
632 | return sp; |
633 | } | |
634 | ||
635 | ||
31e31b8a FB |
636 | static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, |
637 | int interpreter_fd, | |
638 | unsigned long *interp_load_addr) | |
639 | { | |
640 | struct elf_phdr *elf_phdata = NULL; | |
641 | struct elf_phdr *eppnt; | |
09bfb054 | 642 | unsigned long load_addr = 0; |
31e31b8a FB |
643 | int load_addr_set = 0; |
644 | int retval; | |
645 | unsigned long last_bss, elf_bss; | |
646 | unsigned long error; | |
647 | int i; | |
648 | ||
649 | elf_bss = 0; | |
650 | last_bss = 0; | |
651 | error = 0; | |
652 | ||
644c433c FB |
653 | #ifdef BSWAP_NEEDED |
654 | bswap_ehdr(interp_elf_ex); | |
655 | #endif | |
31e31b8a FB |
656 | /* First of all, some simple consistency checks */ |
657 | if ((interp_elf_ex->e_type != ET_EXEC && | |
09bfb054 | 658 | interp_elf_ex->e_type != ET_DYN) || |
31e31b8a FB |
659 | !elf_check_arch(interp_elf_ex->e_machine)) { |
660 | return ~0UL; | |
661 | } | |
662 | ||
644c433c | 663 | |
31e31b8a FB |
664 | /* Now read in all of the header information */ |
665 | ||
54936004 | 666 | if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
31e31b8a FB |
667 | return ~0UL; |
668 | ||
669 | elf_phdata = (struct elf_phdr *) | |
670 | malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
671 | ||
672 | if (!elf_phdata) | |
673 | return ~0UL; | |
674 | ||
675 | /* | |
676 | * If the size of this structure has changed, then punt, since | |
677 | * we will be doing the wrong thing. | |
678 | */ | |
09bfb054 | 679 | if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
31e31b8a FB |
680 | free(elf_phdata); |
681 | return ~0UL; | |
09bfb054 | 682 | } |
31e31b8a FB |
683 | |
684 | retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); | |
685 | if(retval >= 0) { | |
686 | retval = read(interpreter_fd, | |
687 | (char *) elf_phdata, | |
688 | sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
689 | } | |
31e31b8a FB |
690 | if (retval < 0) { |
691 | perror("load_elf_interp"); | |
692 | exit(-1); | |
693 | free (elf_phdata); | |
694 | return retval; | |
695 | } | |
696 | #ifdef BSWAP_NEEDED | |
697 | eppnt = elf_phdata; | |
698 | for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { | |
699 | bswap_phdr(eppnt); | |
700 | } | |
701 | #endif | |
09bfb054 FB |
702 | |
703 | if (interp_elf_ex->e_type == ET_DYN) { | |
704 | /* in order to avoid harcoding the interpreter load | |
705 | address in qemu, we allocate a big enough memory zone */ | |
54936004 FB |
706 | error = target_mmap(0, INTERP_MAP_SIZE, |
707 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
708 | -1, 0); | |
09bfb054 FB |
709 | if (error == -1) { |
710 | perror("mmap"); | |
711 | exit(-1); | |
712 | } | |
713 | load_addr = error; | |
714 | load_addr_set = 1; | |
715 | } | |
716 | ||
31e31b8a FB |
717 | eppnt = elf_phdata; |
718 | for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) | |
719 | if (eppnt->p_type == PT_LOAD) { | |
720 | int elf_type = MAP_PRIVATE | MAP_DENYWRITE; | |
721 | int elf_prot = 0; | |
722 | unsigned long vaddr = 0; | |
723 | unsigned long k; | |
724 | ||
725 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
726 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
727 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
728 | if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) { | |
729 | elf_type |= MAP_FIXED; | |
730 | vaddr = eppnt->p_vaddr; | |
731 | } | |
54936004 FB |
732 | error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
733 | eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), | |
31e31b8a FB |
734 | elf_prot, |
735 | elf_type, | |
736 | interpreter_fd, | |
54936004 | 737 | eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
31e31b8a | 738 | |
e89f07d3 | 739 | if (error == -1) { |
31e31b8a FB |
740 | /* Real error */ |
741 | close(interpreter_fd); | |
742 | free(elf_phdata); | |
743 | return ~0UL; | |
744 | } | |
745 | ||
746 | if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { | |
747 | load_addr = error; | |
748 | load_addr_set = 1; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Find the end of the file mapping for this phdr, and keep | |
753 | * track of the largest address we see for this. | |
754 | */ | |
755 | k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; | |
756 | if (k > elf_bss) elf_bss = k; | |
757 | ||
758 | /* | |
759 | * Do the same thing for the memory mapping - between | |
760 | * elf_bss and last_bss is the bss section. | |
761 | */ | |
762 | k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; | |
763 | if (k > last_bss) last_bss = k; | |
764 | } | |
765 | ||
766 | /* Now use mmap to map the library into memory. */ | |
767 | ||
768 | close(interpreter_fd); | |
769 | ||
770 | /* | |
771 | * Now fill out the bss section. First pad the last page up | |
772 | * to the page boundary, and then perform a mmap to make sure | |
773 | * that there are zeromapped pages up to and including the last | |
774 | * bss page. | |
775 | */ | |
776 | padzero(elf_bss); | |
83fb7adf | 777 | elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
31e31b8a FB |
778 | |
779 | /* Map the last of the bss segment */ | |
780 | if (last_bss > elf_bss) { | |
54936004 FB |
781 | target_mmap(elf_bss, last_bss-elf_bss, |
782 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
783 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
31e31b8a FB |
784 | } |
785 | free(elf_phdata); | |
786 | ||
787 | *interp_load_addr = load_addr; | |
788 | return ((unsigned long) interp_elf_ex->e_entry) + load_addr; | |
789 | } | |
790 | ||
689f936f FB |
791 | /* Best attempt to load symbols from this ELF object. */ |
792 | static void load_symbols(struct elfhdr *hdr, int fd) | |
793 | { | |
794 | unsigned int i; | |
795 | struct elf_shdr sechdr, symtab, strtab; | |
796 | char *strings; | |
e80cfcfc | 797 | struct syminfo *s; |
689f936f FB |
798 | |
799 | lseek(fd, hdr->e_shoff, SEEK_SET); | |
800 | for (i = 0; i < hdr->e_shnum; i++) { | |
801 | if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) | |
802 | return; | |
803 | #ifdef BSWAP_NEEDED | |
804 | bswap_shdr(&sechdr); | |
805 | #endif | |
806 | if (sechdr.sh_type == SHT_SYMTAB) { | |
807 | symtab = sechdr; | |
808 | lseek(fd, hdr->e_shoff | |
809 | + sizeof(sechdr) * sechdr.sh_link, SEEK_SET); | |
810 | if (read(fd, &strtab, sizeof(strtab)) | |
811 | != sizeof(strtab)) | |
812 | return; | |
813 | #ifdef BSWAP_NEEDED | |
814 | bswap_shdr(&strtab); | |
815 | #endif | |
816 | goto found; | |
817 | } | |
818 | } | |
819 | return; /* Shouldn't happen... */ | |
820 | ||
821 | found: | |
822 | /* Now know where the strtab and symtab are. Snarf them. */ | |
e80cfcfc FB |
823 | s = malloc(sizeof(*s)); |
824 | s->disas_symtab = malloc(symtab.sh_size); | |
825 | s->disas_strtab = strings = malloc(strtab.sh_size); | |
826 | if (!s->disas_symtab || !s->disas_strtab) | |
689f936f FB |
827 | return; |
828 | ||
829 | lseek(fd, symtab.sh_offset, SEEK_SET); | |
e80cfcfc | 830 | if (read(fd, s->disas_symtab, symtab.sh_size) != symtab.sh_size) |
689f936f | 831 | return; |
31e31b8a | 832 | |
689f936f FB |
833 | #ifdef BSWAP_NEEDED |
834 | for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++) | |
e80cfcfc | 835 | bswap_sym(s->disas_symtab + sizeof(struct elf_sym)*i); |
689f936f FB |
836 | #endif |
837 | ||
838 | lseek(fd, strtab.sh_offset, SEEK_SET); | |
839 | if (read(fd, strings, strtab.sh_size) != strtab.sh_size) | |
840 | return; | |
e80cfcfc FB |
841 | s->disas_num_syms = symtab.sh_size / sizeof(struct elf_sym); |
842 | s->next = syminfos; | |
843 | syminfos = s; | |
689f936f | 844 | } |
31e31b8a | 845 | |
e5fe0c52 PB |
846 | int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
847 | struct image_info * info) | |
31e31b8a FB |
848 | { |
849 | struct elfhdr elf_ex; | |
850 | struct elfhdr interp_elf_ex; | |
851 | struct exec interp_ex; | |
852 | int interpreter_fd = -1; /* avoid warning */ | |
09bfb054 | 853 | unsigned long load_addr, load_bias; |
31e31b8a FB |
854 | int load_addr_set = 0; |
855 | unsigned int interpreter_type = INTERPRETER_NONE; | |
856 | unsigned char ibcs2_interpreter; | |
857 | int i; | |
54936004 | 858 | unsigned long mapped_addr; |
31e31b8a FB |
859 | struct elf_phdr * elf_ppnt; |
860 | struct elf_phdr *elf_phdata; | |
861 | unsigned long elf_bss, k, elf_brk; | |
862 | int retval; | |
863 | char * elf_interpreter; | |
864 | unsigned long elf_entry, interp_load_addr = 0; | |
865 | int status; | |
866 | unsigned long start_code, end_code, end_data; | |
867 | unsigned long elf_stack; | |
868 | char passed_fileno[6]; | |
869 | ||
870 | ibcs2_interpreter = 0; | |
871 | status = 0; | |
872 | load_addr = 0; | |
09bfb054 | 873 | load_bias = 0; |
31e31b8a FB |
874 | elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
875 | #ifdef BSWAP_NEEDED | |
876 | bswap_ehdr(&elf_ex); | |
877 | #endif | |
878 | ||
31e31b8a FB |
879 | /* First of all, some simple consistency checks */ |
880 | if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) || | |
881 | (! elf_check_arch(elf_ex.e_machine))) { | |
882 | return -ENOEXEC; | |
883 | } | |
884 | ||
e5fe0c52 PB |
885 | bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p); |
886 | bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); | |
887 | bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); | |
888 | if (!bprm->p) { | |
889 | retval = -E2BIG; | |
890 | } | |
891 | ||
31e31b8a | 892 | /* Now read in all of the header information */ |
31e31b8a FB |
893 | elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum); |
894 | if (elf_phdata == NULL) { | |
895 | return -ENOMEM; | |
896 | } | |
897 | ||
898 | retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); | |
899 | if(retval > 0) { | |
900 | retval = read(bprm->fd, (char *) elf_phdata, | |
901 | elf_ex.e_phentsize * elf_ex.e_phnum); | |
902 | } | |
903 | ||
904 | if (retval < 0) { | |
905 | perror("load_elf_binary"); | |
906 | exit(-1); | |
907 | free (elf_phdata); | |
908 | return -errno; | |
909 | } | |
910 | ||
b17780d5 FB |
911 | #ifdef BSWAP_NEEDED |
912 | elf_ppnt = elf_phdata; | |
913 | for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { | |
914 | bswap_phdr(elf_ppnt); | |
915 | } | |
916 | #endif | |
31e31b8a FB |
917 | elf_ppnt = elf_phdata; |
918 | ||
919 | elf_bss = 0; | |
920 | elf_brk = 0; | |
921 | ||
922 | ||
923 | elf_stack = ~0UL; | |
924 | elf_interpreter = NULL; | |
925 | start_code = ~0UL; | |
926 | end_code = 0; | |
927 | end_data = 0; | |
928 | ||
929 | for(i=0;i < elf_ex.e_phnum; i++) { | |
930 | if (elf_ppnt->p_type == PT_INTERP) { | |
931 | if ( elf_interpreter != NULL ) | |
932 | { | |
933 | free (elf_phdata); | |
934 | free(elf_interpreter); | |
935 | close(bprm->fd); | |
936 | return -EINVAL; | |
937 | } | |
938 | ||
939 | /* This is the program interpreter used for | |
940 | * shared libraries - for now assume that this | |
941 | * is an a.out format binary | |
942 | */ | |
943 | ||
32ce6337 | 944 | elf_interpreter = (char *)malloc(elf_ppnt->p_filesz); |
31e31b8a FB |
945 | |
946 | if (elf_interpreter == NULL) { | |
947 | free (elf_phdata); | |
948 | close(bprm->fd); | |
949 | return -ENOMEM; | |
950 | } | |
951 | ||
31e31b8a FB |
952 | retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
953 | if(retval >= 0) { | |
32ce6337 | 954 | retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
31e31b8a FB |
955 | } |
956 | if(retval < 0) { | |
957 | perror("load_elf_binary2"); | |
958 | exit(-1); | |
959 | } | |
960 | ||
961 | /* If the program interpreter is one of these two, | |
962 | then assume an iBCS2 image. Otherwise assume | |
963 | a native linux image. */ | |
964 | ||
965 | /* JRP - Need to add X86 lib dir stuff here... */ | |
966 | ||
967 | if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || | |
968 | strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { | |
969 | ibcs2_interpreter = 1; | |
970 | } | |
971 | ||
972 | #if 0 | |
973 | printf("Using ELF interpreter %s\n", elf_interpreter); | |
974 | #endif | |
975 | if (retval >= 0) { | |
32ce6337 | 976 | retval = open(path(elf_interpreter), O_RDONLY); |
31e31b8a FB |
977 | if(retval >= 0) { |
978 | interpreter_fd = retval; | |
979 | } | |
980 | else { | |
981 | perror(elf_interpreter); | |
982 | exit(-1); | |
983 | /* retval = -errno; */ | |
984 | } | |
985 | } | |
986 | ||
987 | if (retval >= 0) { | |
988 | retval = lseek(interpreter_fd, 0, SEEK_SET); | |
989 | if(retval >= 0) { | |
990 | retval = read(interpreter_fd,bprm->buf,128); | |
991 | } | |
992 | } | |
993 | if (retval >= 0) { | |
994 | interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ | |
995 | interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */ | |
996 | } | |
997 | if (retval < 0) { | |
998 | perror("load_elf_binary3"); | |
999 | exit(-1); | |
1000 | free (elf_phdata); | |
1001 | free(elf_interpreter); | |
1002 | close(bprm->fd); | |
1003 | return retval; | |
1004 | } | |
1005 | } | |
1006 | elf_ppnt++; | |
1007 | } | |
1008 | ||
1009 | /* Some simple consistency checks for the interpreter */ | |
1010 | if (elf_interpreter){ | |
1011 | interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; | |
1012 | ||
1013 | /* Now figure out which format our binary is */ | |
1014 | if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) && | |
1015 | (N_MAGIC(interp_ex) != QMAGIC)) { | |
1016 | interpreter_type = INTERPRETER_ELF; | |
1017 | } | |
1018 | ||
1019 | if (interp_elf_ex.e_ident[0] != 0x7f || | |
1020 | strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) { | |
1021 | interpreter_type &= ~INTERPRETER_ELF; | |
1022 | } | |
1023 | ||
1024 | if (!interpreter_type) { | |
1025 | free(elf_interpreter); | |
1026 | free(elf_phdata); | |
1027 | close(bprm->fd); | |
1028 | return -ELIBBAD; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | /* OK, we are done with that, now set up the arg stuff, | |
1033 | and then start this sucker up */ | |
1034 | ||
e5fe0c52 | 1035 | { |
31e31b8a FB |
1036 | char * passed_p; |
1037 | ||
1038 | if (interpreter_type == INTERPRETER_AOUT) { | |
eba2af63 | 1039 | snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
31e31b8a FB |
1040 | passed_p = passed_fileno; |
1041 | ||
1042 | if (elf_interpreter) { | |
e5fe0c52 | 1043 | bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p); |
31e31b8a FB |
1044 | bprm->argc++; |
1045 | } | |
1046 | } | |
1047 | if (!bprm->p) { | |
1048 | if (elf_interpreter) { | |
1049 | free(elf_interpreter); | |
1050 | } | |
1051 | free (elf_phdata); | |
1052 | close(bprm->fd); | |
1053 | return -E2BIG; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* OK, This is the point of no return */ | |
1058 | info->end_data = 0; | |
1059 | info->end_code = 0; | |
1060 | info->start_mmap = (unsigned long)ELF_START_MMAP; | |
1061 | info->mmap = 0; | |
1062 | elf_entry = (unsigned long) elf_ex.e_entry; | |
1063 | ||
1064 | /* Do this so that we can load the interpreter, if need be. We will | |
1065 | change some of these later */ | |
1066 | info->rss = 0; | |
1067 | bprm->p = setup_arg_pages(bprm->p, bprm, info); | |
1068 | info->start_stack = bprm->p; | |
1069 | ||
1070 | /* Now we do a little grungy work by mmaping the ELF image into | |
1071 | * the correct location in memory. At this point, we assume that | |
1072 | * the image should be loaded at fixed address, not at a variable | |
1073 | * address. | |
1074 | */ | |
1075 | ||
31e31b8a | 1076 | for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
09bfb054 FB |
1077 | int elf_prot = 0; |
1078 | int elf_flags = 0; | |
1079 | unsigned long error; | |
1080 | ||
1081 | if (elf_ppnt->p_type != PT_LOAD) | |
1082 | continue; | |
1083 | ||
1084 | if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ; | |
1085 | if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1086 | if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1087 | elf_flags = MAP_PRIVATE | MAP_DENYWRITE; | |
1088 | if (elf_ex.e_type == ET_EXEC || load_addr_set) { | |
1089 | elf_flags |= MAP_FIXED; | |
1090 | } else if (elf_ex.e_type == ET_DYN) { | |
1091 | /* Try and get dynamic programs out of the way of the default mmap | |
1092 | base, as well as whatever program they might try to exec. This | |
1093 | is because the brk will follow the loader, and is not movable. */ | |
1094 | /* NOTE: for qemu, we do a big mmap to get enough space | |
1095 | without harcoding any address */ | |
54936004 FB |
1096 | error = target_mmap(0, ET_DYN_MAP_SIZE, |
1097 | PROT_NONE, MAP_PRIVATE | MAP_ANON, | |
1098 | -1, 0); | |
09bfb054 FB |
1099 | if (error == -1) { |
1100 | perror("mmap"); | |
1101 | exit(-1); | |
1102 | } | |
54936004 | 1103 | load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
09bfb054 FB |
1104 | } |
1105 | ||
54936004 FB |
1106 | error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1107 | (elf_ppnt->p_filesz + | |
1108 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), | |
1109 | elf_prot, | |
1110 | (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), | |
1111 | bprm->fd, | |
1112 | (elf_ppnt->p_offset - | |
1113 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); | |
09bfb054 FB |
1114 | if (error == -1) { |
1115 | perror("mmap"); | |
1116 | exit(-1); | |
1117 | } | |
31e31b8a FB |
1118 | |
1119 | #ifdef LOW_ELF_STACK | |
54936004 FB |
1120 | if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack) |
1121 | elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); | |
31e31b8a | 1122 | #endif |
09bfb054 FB |
1123 | |
1124 | if (!load_addr_set) { | |
1125 | load_addr_set = 1; | |
1126 | load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; | |
1127 | if (elf_ex.e_type == ET_DYN) { | |
1128 | load_bias += error - | |
54936004 | 1129 | TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
09bfb054 FB |
1130 | load_addr += load_bias; |
1131 | } | |
1132 | } | |
1133 | k = elf_ppnt->p_vaddr; | |
1134 | if (k < start_code) | |
1135 | start_code = k; | |
1136 | k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; | |
1137 | if (k > elf_bss) | |
1138 | elf_bss = k; | |
1139 | if ((elf_ppnt->p_flags & PF_X) && end_code < k) | |
1140 | end_code = k; | |
1141 | if (end_data < k) | |
1142 | end_data = k; | |
1143 | k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; | |
1144 | if (k > elf_brk) elf_brk = k; | |
31e31b8a FB |
1145 | } |
1146 | ||
09bfb054 FB |
1147 | elf_entry += load_bias; |
1148 | elf_bss += load_bias; | |
1149 | elf_brk += load_bias; | |
1150 | start_code += load_bias; | |
1151 | end_code += load_bias; | |
1152 | // start_data += load_bias; | |
1153 | end_data += load_bias; | |
1154 | ||
31e31b8a FB |
1155 | if (elf_interpreter) { |
1156 | if (interpreter_type & 1) { | |
1157 | elf_entry = load_aout_interp(&interp_ex, interpreter_fd); | |
1158 | } | |
1159 | else if (interpreter_type & 2) { | |
1160 | elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, | |
1161 | &interp_load_addr); | |
1162 | } | |
1163 | ||
1164 | close(interpreter_fd); | |
1165 | free(elf_interpreter); | |
1166 | ||
1167 | if (elf_entry == ~0UL) { | |
1168 | printf("Unable to load interpreter\n"); | |
1169 | free(elf_phdata); | |
1170 | exit(-1); | |
1171 | return 0; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | free(elf_phdata); | |
1176 | ||
689f936f FB |
1177 | if (loglevel) |
1178 | load_symbols(&elf_ex, bprm->fd); | |
1179 | ||
31e31b8a FB |
1180 | if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd); |
1181 | info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); | |
1182 | ||
1183 | #ifdef LOW_ELF_STACK | |
1184 | info->start_stack = bprm->p = elf_stack - 4; | |
1185 | #endif | |
53a5960a | 1186 | bprm->p = create_elf_tables(bprm->p, |
31e31b8a FB |
1187 | bprm->argc, |
1188 | bprm->envc, | |
a1516e92 | 1189 | &elf_ex, |
09bfb054 | 1190 | load_addr, load_bias, |
31e31b8a FB |
1191 | interp_load_addr, |
1192 | (interpreter_type == INTERPRETER_AOUT ? 0 : 1), | |
1193 | info); | |
31e31b8a FB |
1194 | info->start_brk = info->brk = elf_brk; |
1195 | info->end_code = end_code; | |
1196 | info->start_code = start_code; | |
e5fe0c52 | 1197 | info->start_data = end_code; |
31e31b8a FB |
1198 | info->end_data = end_data; |
1199 | info->start_stack = bprm->p; | |
1200 | ||
1201 | /* Calling set_brk effectively mmaps the pages that we need for the bss and break | |
1202 | sections */ | |
1203 | set_brk(elf_bss, elf_brk); | |
1204 | ||
1205 | padzero(elf_bss); | |
1206 | ||
1207 | #if 0 | |
1208 | printf("(start_brk) %x\n" , info->start_brk); | |
1209 | printf("(end_code) %x\n" , info->end_code); | |
1210 | printf("(start_code) %x\n" , info->start_code); | |
1211 | printf("(end_data) %x\n" , info->end_data); | |
1212 | printf("(start_stack) %x\n" , info->start_stack); | |
1213 | printf("(brk) %x\n" , info->brk); | |
1214 | #endif | |
1215 | ||
1216 | if ( info->personality == PER_SVR4 ) | |
1217 | { | |
1218 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, | |
1219 | and some applications "depend" upon this behavior. | |
1220 | Since we do not have the power to recompile these, we | |
1221 | emulate the SVr4 behavior. Sigh. */ | |
83fb7adf | 1222 | mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, |
54936004 | 1223 | MAP_FIXED | MAP_PRIVATE, -1, 0); |
31e31b8a FB |
1224 | } |
1225 | ||
31e31b8a FB |
1226 | info->entry = elf_entry; |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
31e31b8a FB |
1231 | static int load_aout_interp(void * exptr, int interp_fd) |
1232 | { | |
1233 | printf("a.out interpreter not yet supported\n"); | |
1234 | return(0); | |
1235 | } | |
1236 | ||
e5fe0c52 PB |
1237 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
1238 | { | |
1239 | init_thread(regs, infop); | |
1240 | } |