root / linux-user / elfload.c @ 50d3eeae
History | View | Annotate | Download (35.6 kB)
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 <errno.h> |
7 |
#include <unistd.h> |
8 |
#include <sys/mman.h> |
9 |
#include <stdlib.h> |
10 |
#include <string.h> |
11 |
|
12 |
#include "qemu.h" |
13 |
#include "disas.h" |
14 |
|
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 |
|
25 |
#ifdef TARGET_I386
|
26 |
|
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 |
|
47 |
#define ELF_START_MMAP 0x80000000 |
48 |
|
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 |
|
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; |
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;
|
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 |
|
95 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
96 |
{ |
97 |
target_long stack = infop->start_stack; |
98 |
memset(regs, 0, sizeof(*regs)); |
99 |
regs->ARM_cpsr = 0x10;
|
100 |
if (infop->entry & 1) |
101 |
regs->ARM_cpsr |= CPSR_T; |
102 |
regs->ARM_pc = infop->entry & 0xfffffffe;
|
103 |
regs->ARM_sp = infop->start_stack; |
104 |
regs->ARM_r2 = tgetl(stack + 8); /* envp */ |
105 |
regs->ARM_r1 = tgetl(stack + 4); /* envp */ |
106 |
/* XXX: it seems that r0 is zeroed after ! */
|
107 |
regs->ARM_r0 = 0;
|
108 |
/* For uClinux PIC binaries. */
|
109 |
regs->ARM_r10 = infop->start_data; |
110 |
} |
111 |
|
112 |
#define USE_ELF_CORE_DUMP
|
113 |
#define ELF_EXEC_PAGESIZE 4096 |
114 |
|
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 |
|
127 |
#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
|
128 |
| ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
129 |
| ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP) |
130 |
|
131 |
#endif
|
132 |
|
133 |
#ifdef TARGET_SPARC
|
134 |
#ifdef TARGET_SPARC64
|
135 |
|
136 |
#define ELF_START_MMAP 0x80000000 |
137 |
|
138 |
#define elf_check_arch(x) ( (x) == EM_SPARCV9 )
|
139 |
|
140 |
#define ELF_CLASS ELFCLASS64
|
141 |
#define ELF_DATA ELFDATA2MSB
|
142 |
#define ELF_ARCH EM_SPARCV9
|
143 |
|
144 |
#define STACK_BIAS 2047 |
145 |
|
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;
|
152 |
regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; |
153 |
} |
154 |
|
155 |
#else
|
156 |
#define ELF_START_MMAP 0x80000000 |
157 |
|
158 |
#define elf_check_arch(x) ( (x) == EM_SPARC )
|
159 |
|
160 |
#define ELF_CLASS ELFCLASS32
|
161 |
#define ELF_DATA ELFDATA2MSB
|
162 |
#define ELF_ARCH EM_SPARC
|
163 |
|
164 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
165 |
{ |
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; |
171 |
} |
172 |
|
173 |
#endif
|
174 |
#endif
|
175 |
|
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 |
|
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 |
*/
|
208 |
#define DLINFO_ARCH_ITEMS 5 |
209 |
#define ARCH_DLINFO \
|
210 |
do { \
|
211 |
NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
|
212 |
NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
|
213 |
NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
|
214 |
/* \
|
215 |
* Now handle glibc compatibility. \
|
216 |
*/ \
|
217 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
218 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
219 |
} while (0) |
220 |
|
221 |
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
222 |
{ |
223 |
target_ulong pos = infop->start_stack; |
224 |
target_ulong tmp; |
225 |
|
226 |
_regs->msr = 1 << MSR_PR; /* Set user mode */ |
227 |
_regs->gpr[1] = infop->start_stack;
|
228 |
_regs->nip = infop->entry; |
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;
|
239 |
} |
240 |
|
241 |
#define USE_ELF_CORE_DUMP
|
242 |
#define ELF_EXEC_PAGESIZE 4096 |
243 |
|
244 |
#endif
|
245 |
|
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 |
|
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 |
|
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 |
|
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 |
|
291 |
#ifdef TARGET_M68K
|
292 |
|
293 |
#define ELF_START_MMAP 0x80000000 |
294 |
|
295 |
#define elf_check_arch(x) ( (x) == EM_68K )
|
296 |
|
297 |
#define ELF_CLASS ELFCLASS32
|
298 |
#define ELF_DATA ELFDATA2MSB
|
299 |
#define ELF_ARCH EM_68K
|
300 |
|
301 |
/* ??? Does this need to do anything?
|
302 |
#define ELF_PLAT_INIT(_r) */
|
303 |
|
304 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
305 |
{ |
306 |
regs->usp = infop->start_stack; |
307 |
regs->sr = 0;
|
308 |
regs->pc = infop->entry; |
309 |
} |
310 |
|
311 |
#define USE_ELF_CORE_DUMP
|
312 |
#define ELF_EXEC_PAGESIZE 8192 |
313 |
|
314 |
#endif
|
315 |
|
316 |
#ifndef ELF_PLATFORM
|
317 |
#define ELF_PLATFORM (NULL) |
318 |
#endif
|
319 |
|
320 |
#ifndef ELF_HWCAP
|
321 |
#define ELF_HWCAP 0 |
322 |
#endif
|
323 |
|
324 |
#include "elf.h" |
325 |
|
326 |
struct exec
|
327 |
{ |
328 |
unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
329 |
unsigned int a_text; /* length of text, in bytes */ |
330 |
unsigned int a_data; /* length of data, in bytes */ |
331 |
unsigned int a_bss; /* length of uninitialized data area, in bytes */ |
332 |
unsigned int a_syms; /* length of symbol table data in file, in bytes */ |
333 |
unsigned int a_entry; /* start address */ |
334 |
unsigned int a_trsize; /* length of relocation info for text, in bytes */ |
335 |
unsigned int a_drsize; /* length of relocation info for data, in bytes */ |
336 |
}; |
337 |
|
338 |
|
339 |
#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
340 |
#define OMAGIC 0407 |
341 |
#define NMAGIC 0410 |
342 |
#define ZMAGIC 0413 |
343 |
#define QMAGIC 0314 |
344 |
|
345 |
/* max code+data+bss space allocated to elf interpreter */
|
346 |
#define INTERP_MAP_SIZE (32 * 1024 * 1024) |
347 |
|
348 |
/* max code+data+bss+brk space allocated to ET_DYN executables */
|
349 |
#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) |
350 |
|
351 |
/* from personality.h */
|
352 |
|
353 |
/* Flags for bug emulation. These occupy the top three bytes. */
|
354 |
#define STICKY_TIMEOUTS 0x4000000 |
355 |
#define WHOLE_SECONDS 0x2000000 |
356 |
|
357 |
/* Personality types. These go in the low byte. Avoid using the top bit,
|
358 |
* it will conflict with error returns.
|
359 |
*/
|
360 |
#define PER_MASK (0x00ff) |
361 |
#define PER_LINUX (0x0000) |
362 |
#define PER_SVR4 (0x0001 | STICKY_TIMEOUTS) |
363 |
#define PER_SVR3 (0x0002 | STICKY_TIMEOUTS) |
364 |
#define PER_SCOSVR3 (0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS) |
365 |
#define PER_WYSEV386 (0x0004 | STICKY_TIMEOUTS) |
366 |
#define PER_ISCR4 (0x0005 | STICKY_TIMEOUTS) |
367 |
#define PER_BSD (0x0006) |
368 |
#define PER_XENIX (0x0007 | STICKY_TIMEOUTS) |
369 |
|
370 |
/* Necessary parameters */
|
371 |
#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
|
372 |
#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) |
373 |
#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) |
374 |
|
375 |
#define INTERPRETER_NONE 0 |
376 |
#define INTERPRETER_AOUT 1 |
377 |
#define INTERPRETER_ELF 2 |
378 |
|
379 |
#define DLINFO_ITEMS 12 |
380 |
|
381 |
static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
382 |
{ |
383 |
memcpy(to, from, n); |
384 |
} |
385 |
|
386 |
extern unsigned long x86_stack_size; |
387 |
|
388 |
static int load_aout_interp(void * exptr, int interp_fd); |
389 |
|
390 |
#ifdef BSWAP_NEEDED
|
391 |
static void bswap_ehdr(struct elfhdr *ehdr) |
392 |
{ |
393 |
bswap16s(&ehdr->e_type); /* Object file type */
|
394 |
bswap16s(&ehdr->e_machine); /* Architecture */
|
395 |
bswap32s(&ehdr->e_version); /* Object file version */
|
396 |
bswaptls(&ehdr->e_entry); /* Entry point virtual address */
|
397 |
bswaptls(&ehdr->e_phoff); /* Program header table file offset */
|
398 |
bswaptls(&ehdr->e_shoff); /* Section header table file offset */
|
399 |
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
|
400 |
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
|
401 |
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
|
402 |
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
|
403 |
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
|
404 |
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
|
405 |
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
|
406 |
} |
407 |
|
408 |
static void bswap_phdr(struct elf_phdr *phdr) |
409 |
{ |
410 |
bswap32s(&phdr->p_type); /* Segment type */
|
411 |
bswaptls(&phdr->p_offset); /* Segment file offset */
|
412 |
bswaptls(&phdr->p_vaddr); /* Segment virtual address */
|
413 |
bswaptls(&phdr->p_paddr); /* Segment physical address */
|
414 |
bswaptls(&phdr->p_filesz); /* Segment size in file */
|
415 |
bswaptls(&phdr->p_memsz); /* Segment size in memory */
|
416 |
bswap32s(&phdr->p_flags); /* Segment flags */
|
417 |
bswaptls(&phdr->p_align); /* Segment alignment */
|
418 |
} |
419 |
|
420 |
static void bswap_shdr(struct elf_shdr *shdr) |
421 |
{ |
422 |
bswap32s(&shdr->sh_name); |
423 |
bswap32s(&shdr->sh_type); |
424 |
bswaptls(&shdr->sh_flags); |
425 |
bswaptls(&shdr->sh_addr); |
426 |
bswaptls(&shdr->sh_offset); |
427 |
bswaptls(&shdr->sh_size); |
428 |
bswap32s(&shdr->sh_link); |
429 |
bswap32s(&shdr->sh_info); |
430 |
bswaptls(&shdr->sh_addralign); |
431 |
bswaptls(&shdr->sh_entsize); |
432 |
} |
433 |
|
434 |
static void bswap_sym(Elf32_Sym *sym) |
435 |
{ |
436 |
bswap32s(&sym->st_name); |
437 |
bswap32s(&sym->st_value); |
438 |
bswap32s(&sym->st_size); |
439 |
bswap16s(&sym->st_shndx); |
440 |
} |
441 |
#endif
|
442 |
|
443 |
/*
|
444 |
* 'copy_elf_strings()' copies argument/envelope strings from user
|
445 |
* memory to free pages in kernel mem. These are in a format ready
|
446 |
* to be put directly into the top of new user memory.
|
447 |
*
|
448 |
*/
|
449 |
static unsigned long copy_elf_strings(int argc,char ** argv, void **page, |
450 |
unsigned long p) |
451 |
{ |
452 |
char *tmp, *tmp1, *pag = NULL; |
453 |
int len, offset = 0; |
454 |
|
455 |
if (!p) {
|
456 |
return 0; /* bullet-proofing */ |
457 |
} |
458 |
while (argc-- > 0) { |
459 |
tmp = argv[argc]; |
460 |
if (!tmp) {
|
461 |
fprintf(stderr, "VFS: argc is wrong");
|
462 |
exit(-1);
|
463 |
} |
464 |
tmp1 = tmp; |
465 |
while (*tmp++);
|
466 |
len = tmp - tmp1; |
467 |
if (p < len) { /* this shouldn't happen - 128kB */ |
468 |
return 0; |
469 |
} |
470 |
while (len) {
|
471 |
--p; --tmp; --len; |
472 |
if (--offset < 0) { |
473 |
offset = p % TARGET_PAGE_SIZE; |
474 |
pag = (char *)page[p/TARGET_PAGE_SIZE];
|
475 |
if (!pag) {
|
476 |
pag = (char *)malloc(TARGET_PAGE_SIZE);
|
477 |
page[p/TARGET_PAGE_SIZE] = pag; |
478 |
if (!pag)
|
479 |
return 0; |
480 |
} |
481 |
} |
482 |
if (len == 0 || offset == 0) { |
483 |
*(pag + offset) = *tmp; |
484 |
} |
485 |
else {
|
486 |
int bytes_to_copy = (len > offset) ? offset : len;
|
487 |
tmp -= bytes_to_copy; |
488 |
p -= bytes_to_copy; |
489 |
offset -= bytes_to_copy; |
490 |
len -= bytes_to_copy; |
491 |
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
492 |
} |
493 |
} |
494 |
} |
495 |
return p;
|
496 |
} |
497 |
|
498 |
unsigned long setup_arg_pages(target_ulong p, struct linux_binprm * bprm, |
499 |
struct image_info * info)
|
500 |
{ |
501 |
target_ulong stack_base, size, error; |
502 |
int i;
|
503 |
|
504 |
/* Create enough stack to hold everything. If we don't use
|
505 |
* it for args, we'll use it for something else...
|
506 |
*/
|
507 |
size = x86_stack_size; |
508 |
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
|
509 |
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
510 |
error = target_mmap(0,
|
511 |
size + qemu_host_page_size, |
512 |
PROT_READ | PROT_WRITE, |
513 |
MAP_PRIVATE | MAP_ANONYMOUS, |
514 |
-1, 0); |
515 |
if (error == -1) { |
516 |
perror("stk mmap");
|
517 |
exit(-1);
|
518 |
} |
519 |
/* we reserve one extra page at the top of the stack as guard */
|
520 |
target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
521 |
|
522 |
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
523 |
p += stack_base; |
524 |
|
525 |
for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
526 |
if (bprm->page[i]) {
|
527 |
info->rss++; |
528 |
|
529 |
memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
530 |
free(bprm->page[i]); |
531 |
} |
532 |
stack_base += TARGET_PAGE_SIZE; |
533 |
} |
534 |
return p;
|
535 |
} |
536 |
|
537 |
static void set_brk(unsigned long start, unsigned long end) |
538 |
{ |
539 |
/* page-align the start and end addresses... */
|
540 |
start = HOST_PAGE_ALIGN(start); |
541 |
end = HOST_PAGE_ALIGN(end); |
542 |
if (end <= start)
|
543 |
return;
|
544 |
if(target_mmap(start, end - start,
|
545 |
PROT_READ | PROT_WRITE | PROT_EXEC, |
546 |
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { |
547 |
perror("cannot mmap brk");
|
548 |
exit(-1);
|
549 |
} |
550 |
} |
551 |
|
552 |
|
553 |
/* We need to explicitly zero any fractional pages after the data
|
554 |
section (i.e. bss). This would contain the junk from the file that
|
555 |
should not be in memory. */
|
556 |
static void padzero(unsigned long elf_bss, unsigned long last_bss) |
557 |
{ |
558 |
unsigned long nbyte; |
559 |
|
560 |
if (elf_bss >= last_bss)
|
561 |
return;
|
562 |
|
563 |
/* XXX: this is really a hack : if the real host page size is
|
564 |
smaller than the target page size, some pages after the end
|
565 |
of the file may not be mapped. A better fix would be to
|
566 |
patch target_mmap(), but it is more complicated as the file
|
567 |
size must be known */
|
568 |
if (qemu_real_host_page_size < qemu_host_page_size) {
|
569 |
unsigned long end_addr, end_addr1; |
570 |
end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
|
571 |
~(qemu_real_host_page_size - 1);
|
572 |
end_addr = HOST_PAGE_ALIGN(elf_bss); |
573 |
if (end_addr1 < end_addr) {
|
574 |
mmap((void *)end_addr1, end_addr - end_addr1,
|
575 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
576 |
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
577 |
} |
578 |
} |
579 |
|
580 |
nbyte = elf_bss & (qemu_host_page_size-1);
|
581 |
if (nbyte) {
|
582 |
nbyte = qemu_host_page_size - nbyte; |
583 |
do {
|
584 |
tput8(elf_bss, 0);
|
585 |
elf_bss++; |
586 |
} while (--nbyte);
|
587 |
} |
588 |
} |
589 |
|
590 |
|
591 |
static unsigned long create_elf_tables(target_ulong p, int argc, int envc, |
592 |
struct elfhdr * exec,
|
593 |
unsigned long load_addr, |
594 |
unsigned long load_bias, |
595 |
unsigned long interp_load_addr, int ibcs, |
596 |
struct image_info *info)
|
597 |
{ |
598 |
target_ulong sp; |
599 |
int size;
|
600 |
target_ulong u_platform; |
601 |
const char *k_platform; |
602 |
const int n = sizeof(target_ulong); |
603 |
|
604 |
sp = p; |
605 |
u_platform = 0;
|
606 |
k_platform = ELF_PLATFORM; |
607 |
if (k_platform) {
|
608 |
size_t len = strlen(k_platform) + 1;
|
609 |
sp -= (len + n - 1) & ~(n - 1); |
610 |
u_platform = sp; |
611 |
memcpy_to_target(sp, k_platform, len); |
612 |
} |
613 |
/*
|
614 |
* Force 16 byte _final_ alignment here for generality.
|
615 |
*/
|
616 |
sp = sp &~ (target_ulong)15;
|
617 |
size = (DLINFO_ITEMS + 1) * 2; |
618 |
if (k_platform)
|
619 |
size += 2;
|
620 |
#ifdef DLINFO_ARCH_ITEMS
|
621 |
size += DLINFO_ARCH_ITEMS * 2;
|
622 |
#endif
|
623 |
size += envc + argc + 2;
|
624 |
size += (!ibcs ? 3 : 1); /* argc itself */ |
625 |
size *= n; |
626 |
if (size & 15) |
627 |
sp -= 16 - (size & 15); |
628 |
|
629 |
#define NEW_AUX_ENT(id, val) do { \ |
630 |
sp -= n; tputl(sp, val); \ |
631 |
sp -= n; tputl(sp, id); \ |
632 |
} while(0) |
633 |
NEW_AUX_ENT (AT_NULL, 0);
|
634 |
|
635 |
/* There must be exactly DLINFO_ITEMS entries here. */
|
636 |
NEW_AUX_ENT(AT_PHDR, (target_ulong)(load_addr + exec->e_phoff)); |
637 |
NEW_AUX_ENT(AT_PHENT, (target_ulong)(sizeof (struct elf_phdr))); |
638 |
NEW_AUX_ENT(AT_PHNUM, (target_ulong)(exec->e_phnum)); |
639 |
NEW_AUX_ENT(AT_PAGESZ, (target_ulong)(TARGET_PAGE_SIZE)); |
640 |
NEW_AUX_ENT(AT_BASE, (target_ulong)(interp_load_addr)); |
641 |
NEW_AUX_ENT(AT_FLAGS, (target_ulong)0);
|
642 |
NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
643 |
NEW_AUX_ENT(AT_UID, (target_ulong) getuid()); |
644 |
NEW_AUX_ENT(AT_EUID, (target_ulong) geteuid()); |
645 |
NEW_AUX_ENT(AT_GID, (target_ulong) getgid()); |
646 |
NEW_AUX_ENT(AT_EGID, (target_ulong) getegid()); |
647 |
NEW_AUX_ENT(AT_HWCAP, (target_ulong) ELF_HWCAP); |
648 |
if (k_platform)
|
649 |
NEW_AUX_ENT(AT_PLATFORM, u_platform); |
650 |
#ifdef ARCH_DLINFO
|
651 |
/*
|
652 |
* ARCH_DLINFO must come last so platform specific code can enforce
|
653 |
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
654 |
*/
|
655 |
ARCH_DLINFO; |
656 |
#endif
|
657 |
#undef NEW_AUX_ENT
|
658 |
|
659 |
sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
660 |
return sp;
|
661 |
} |
662 |
|
663 |
|
664 |
static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, |
665 |
int interpreter_fd,
|
666 |
unsigned long *interp_load_addr) |
667 |
{ |
668 |
struct elf_phdr *elf_phdata = NULL; |
669 |
struct elf_phdr *eppnt;
|
670 |
unsigned long load_addr = 0; |
671 |
int load_addr_set = 0; |
672 |
int retval;
|
673 |
unsigned long last_bss, elf_bss; |
674 |
unsigned long error; |
675 |
int i;
|
676 |
|
677 |
elf_bss = 0;
|
678 |
last_bss = 0;
|
679 |
error = 0;
|
680 |
|
681 |
#ifdef BSWAP_NEEDED
|
682 |
bswap_ehdr(interp_elf_ex); |
683 |
#endif
|
684 |
/* First of all, some simple consistency checks */
|
685 |
if ((interp_elf_ex->e_type != ET_EXEC &&
|
686 |
interp_elf_ex->e_type != ET_DYN) || |
687 |
!elf_check_arch(interp_elf_ex->e_machine)) { |
688 |
return ~0UL; |
689 |
} |
690 |
|
691 |
|
692 |
/* Now read in all of the header information */
|
693 |
|
694 |
if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
695 |
return ~0UL; |
696 |
|
697 |
elf_phdata = (struct elf_phdr *)
|
698 |
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
699 |
|
700 |
if (!elf_phdata)
|
701 |
return ~0UL; |
702 |
|
703 |
/*
|
704 |
* If the size of this structure has changed, then punt, since
|
705 |
* we will be doing the wrong thing.
|
706 |
*/
|
707 |
if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
708 |
free(elf_phdata); |
709 |
return ~0UL; |
710 |
} |
711 |
|
712 |
retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); |
713 |
if(retval >= 0) { |
714 |
retval = read(interpreter_fd, |
715 |
(char *) elf_phdata,
|
716 |
sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
717 |
} |
718 |
if (retval < 0) { |
719 |
perror("load_elf_interp");
|
720 |
exit(-1);
|
721 |
free (elf_phdata); |
722 |
return retval;
|
723 |
} |
724 |
#ifdef BSWAP_NEEDED
|
725 |
eppnt = elf_phdata; |
726 |
for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { |
727 |
bswap_phdr(eppnt); |
728 |
} |
729 |
#endif
|
730 |
|
731 |
if (interp_elf_ex->e_type == ET_DYN) {
|
732 |
/* in order to avoid harcoding the interpreter load
|
733 |
address in qemu, we allocate a big enough memory zone */
|
734 |
error = target_mmap(0, INTERP_MAP_SIZE,
|
735 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
736 |
-1, 0); |
737 |
if (error == -1) { |
738 |
perror("mmap");
|
739 |
exit(-1);
|
740 |
} |
741 |
load_addr = error; |
742 |
load_addr_set = 1;
|
743 |
} |
744 |
|
745 |
eppnt = elf_phdata; |
746 |
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) |
747 |
if (eppnt->p_type == PT_LOAD) {
|
748 |
int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
|
749 |
int elf_prot = 0; |
750 |
unsigned long vaddr = 0; |
751 |
unsigned long k; |
752 |
|
753 |
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
754 |
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
755 |
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
756 |
if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
|
757 |
elf_type |= MAP_FIXED; |
758 |
vaddr = eppnt->p_vaddr; |
759 |
} |
760 |
error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
761 |
eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), |
762 |
elf_prot, |
763 |
elf_type, |
764 |
interpreter_fd, |
765 |
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
766 |
|
767 |
if (error == -1) { |
768 |
/* Real error */
|
769 |
close(interpreter_fd); |
770 |
free(elf_phdata); |
771 |
return ~0UL; |
772 |
} |
773 |
|
774 |
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
|
775 |
load_addr = error; |
776 |
load_addr_set = 1;
|
777 |
} |
778 |
|
779 |
/*
|
780 |
* Find the end of the file mapping for this phdr, and keep
|
781 |
* track of the largest address we see for this.
|
782 |
*/
|
783 |
k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; |
784 |
if (k > elf_bss) elf_bss = k;
|
785 |
|
786 |
/*
|
787 |
* Do the same thing for the memory mapping - between
|
788 |
* elf_bss and last_bss is the bss section.
|
789 |
*/
|
790 |
k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; |
791 |
if (k > last_bss) last_bss = k;
|
792 |
} |
793 |
|
794 |
/* Now use mmap to map the library into memory. */
|
795 |
|
796 |
close(interpreter_fd); |
797 |
|
798 |
/*
|
799 |
* Now fill out the bss section. First pad the last page up
|
800 |
* to the page boundary, and then perform a mmap to make sure
|
801 |
* that there are zeromapped pages up to and including the last
|
802 |
* bss page.
|
803 |
*/
|
804 |
padzero(elf_bss, last_bss); |
805 |
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
806 |
|
807 |
/* Map the last of the bss segment */
|
808 |
if (last_bss > elf_bss) {
|
809 |
target_mmap(elf_bss, last_bss-elf_bss, |
810 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
811 |
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
812 |
} |
813 |
free(elf_phdata); |
814 |
|
815 |
*interp_load_addr = load_addr; |
816 |
return ((unsigned long) interp_elf_ex->e_entry) + load_addr; |
817 |
} |
818 |
|
819 |
/* Best attempt to load symbols from this ELF object. */
|
820 |
static void load_symbols(struct elfhdr *hdr, int fd) |
821 |
{ |
822 |
unsigned int i; |
823 |
struct elf_shdr sechdr, symtab, strtab;
|
824 |
char *strings;
|
825 |
struct syminfo *s;
|
826 |
|
827 |
lseek(fd, hdr->e_shoff, SEEK_SET); |
828 |
for (i = 0; i < hdr->e_shnum; i++) { |
829 |
if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) |
830 |
return;
|
831 |
#ifdef BSWAP_NEEDED
|
832 |
bswap_shdr(&sechdr); |
833 |
#endif
|
834 |
if (sechdr.sh_type == SHT_SYMTAB) {
|
835 |
symtab = sechdr; |
836 |
lseek(fd, hdr->e_shoff |
837 |
+ sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
|
838 |
if (read(fd, &strtab, sizeof(strtab)) |
839 |
!= sizeof(strtab))
|
840 |
return;
|
841 |
#ifdef BSWAP_NEEDED
|
842 |
bswap_shdr(&strtab); |
843 |
#endif
|
844 |
goto found;
|
845 |
} |
846 |
} |
847 |
return; /* Shouldn't happen... */ |
848 |
|
849 |
found:
|
850 |
/* Now know where the strtab and symtab are. Snarf them. */
|
851 |
s = malloc(sizeof(*s));
|
852 |
s->disas_symtab = malloc(symtab.sh_size); |
853 |
s->disas_strtab = strings = malloc(strtab.sh_size); |
854 |
if (!s->disas_symtab || !s->disas_strtab)
|
855 |
return;
|
856 |
|
857 |
lseek(fd, symtab.sh_offset, SEEK_SET); |
858 |
if (read(fd, s->disas_symtab, symtab.sh_size) != symtab.sh_size)
|
859 |
return;
|
860 |
|
861 |
#ifdef BSWAP_NEEDED
|
862 |
for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++) |
863 |
bswap_sym(s->disas_symtab + sizeof(struct elf_sym)*i); |
864 |
#endif
|
865 |
|
866 |
lseek(fd, strtab.sh_offset, SEEK_SET); |
867 |
if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
|
868 |
return;
|
869 |
s->disas_num_syms = symtab.sh_size / sizeof(struct elf_sym); |
870 |
s->next = syminfos; |
871 |
syminfos = s; |
872 |
} |
873 |
|
874 |
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
875 |
struct image_info * info)
|
876 |
{ |
877 |
struct elfhdr elf_ex;
|
878 |
struct elfhdr interp_elf_ex;
|
879 |
struct exec interp_ex;
|
880 |
int interpreter_fd = -1; /* avoid warning */ |
881 |
unsigned long load_addr, load_bias; |
882 |
int load_addr_set = 0; |
883 |
unsigned int interpreter_type = INTERPRETER_NONE; |
884 |
unsigned char ibcs2_interpreter; |
885 |
int i;
|
886 |
unsigned long mapped_addr; |
887 |
struct elf_phdr * elf_ppnt;
|
888 |
struct elf_phdr *elf_phdata;
|
889 |
unsigned long elf_bss, k, elf_brk; |
890 |
int retval;
|
891 |
char * elf_interpreter;
|
892 |
unsigned long elf_entry, interp_load_addr = 0; |
893 |
int status;
|
894 |
unsigned long start_code, end_code, end_data; |
895 |
unsigned long elf_stack; |
896 |
char passed_fileno[6]; |
897 |
|
898 |
ibcs2_interpreter = 0;
|
899 |
status = 0;
|
900 |
load_addr = 0;
|
901 |
load_bias = 0;
|
902 |
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
903 |
#ifdef BSWAP_NEEDED
|
904 |
bswap_ehdr(&elf_ex); |
905 |
#endif
|
906 |
|
907 |
/* First of all, some simple consistency checks */
|
908 |
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
|
909 |
(! elf_check_arch(elf_ex.e_machine))) { |
910 |
return -ENOEXEC;
|
911 |
} |
912 |
|
913 |
bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
|
914 |
bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); |
915 |
bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); |
916 |
if (!bprm->p) {
|
917 |
retval = -E2BIG; |
918 |
} |
919 |
|
920 |
/* Now read in all of the header information */
|
921 |
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
|
922 |
if (elf_phdata == NULL) { |
923 |
return -ENOMEM;
|
924 |
} |
925 |
|
926 |
retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); |
927 |
if(retval > 0) { |
928 |
retval = read(bprm->fd, (char *) elf_phdata,
|
929 |
elf_ex.e_phentsize * elf_ex.e_phnum); |
930 |
} |
931 |
|
932 |
if (retval < 0) { |
933 |
perror("load_elf_binary");
|
934 |
exit(-1);
|
935 |
free (elf_phdata); |
936 |
return -errno;
|
937 |
} |
938 |
|
939 |
#ifdef BSWAP_NEEDED
|
940 |
elf_ppnt = elf_phdata; |
941 |
for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { |
942 |
bswap_phdr(elf_ppnt); |
943 |
} |
944 |
#endif
|
945 |
elf_ppnt = elf_phdata; |
946 |
|
947 |
elf_bss = 0;
|
948 |
elf_brk = 0;
|
949 |
|
950 |
|
951 |
elf_stack = ~0UL;
|
952 |
elf_interpreter = NULL;
|
953 |
start_code = ~0UL;
|
954 |
end_code = 0;
|
955 |
end_data = 0;
|
956 |
|
957 |
for(i=0;i < elf_ex.e_phnum; i++) { |
958 |
if (elf_ppnt->p_type == PT_INTERP) {
|
959 |
if ( elf_interpreter != NULL ) |
960 |
{ |
961 |
free (elf_phdata); |
962 |
free(elf_interpreter); |
963 |
close(bprm->fd); |
964 |
return -EINVAL;
|
965 |
} |
966 |
|
967 |
/* This is the program interpreter used for
|
968 |
* shared libraries - for now assume that this
|
969 |
* is an a.out format binary
|
970 |
*/
|
971 |
|
972 |
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
973 |
|
974 |
if (elf_interpreter == NULL) { |
975 |
free (elf_phdata); |
976 |
close(bprm->fd); |
977 |
return -ENOMEM;
|
978 |
} |
979 |
|
980 |
retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
981 |
if(retval >= 0) { |
982 |
retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
983 |
} |
984 |
if(retval < 0) { |
985 |
perror("load_elf_binary2");
|
986 |
exit(-1);
|
987 |
} |
988 |
|
989 |
/* If the program interpreter is one of these two,
|
990 |
then assume an iBCS2 image. Otherwise assume
|
991 |
a native linux image. */
|
992 |
|
993 |
/* JRP - Need to add X86 lib dir stuff here... */
|
994 |
|
995 |
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || |
996 |
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { |
997 |
ibcs2_interpreter = 1;
|
998 |
} |
999 |
|
1000 |
#if 0
|
1001 |
printf("Using ELF interpreter %s\n", elf_interpreter);
|
1002 |
#endif
|
1003 |
if (retval >= 0) { |
1004 |
retval = open(path(elf_interpreter), O_RDONLY); |
1005 |
if(retval >= 0) { |
1006 |
interpreter_fd = retval; |
1007 |
} |
1008 |
else {
|
1009 |
perror(elf_interpreter); |
1010 |
exit(-1);
|
1011 |
/* retval = -errno; */
|
1012 |
} |
1013 |
} |
1014 |
|
1015 |
if (retval >= 0) { |
1016 |
retval = lseek(interpreter_fd, 0, SEEK_SET);
|
1017 |
if(retval >= 0) { |
1018 |
retval = read(interpreter_fd,bprm->buf,128);
|
1019 |
} |
1020 |
} |
1021 |
if (retval >= 0) { |
1022 |
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ |
1023 |
interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */ |
1024 |
} |
1025 |
if (retval < 0) { |
1026 |
perror("load_elf_binary3");
|
1027 |
exit(-1);
|
1028 |
free (elf_phdata); |
1029 |
free(elf_interpreter); |
1030 |
close(bprm->fd); |
1031 |
return retval;
|
1032 |
} |
1033 |
} |
1034 |
elf_ppnt++; |
1035 |
} |
1036 |
|
1037 |
/* Some simple consistency checks for the interpreter */
|
1038 |
if (elf_interpreter){
|
1039 |
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
1040 |
|
1041 |
/* Now figure out which format our binary is */
|
1042 |
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
1043 |
(N_MAGIC(interp_ex) != QMAGIC)) { |
1044 |
interpreter_type = INTERPRETER_ELF; |
1045 |
} |
1046 |
|
1047 |
if (interp_elf_ex.e_ident[0] != 0x7f || |
1048 |
strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) { |
1049 |
interpreter_type &= ~INTERPRETER_ELF; |
1050 |
} |
1051 |
|
1052 |
if (!interpreter_type) {
|
1053 |
free(elf_interpreter); |
1054 |
free(elf_phdata); |
1055 |
close(bprm->fd); |
1056 |
return -ELIBBAD;
|
1057 |
} |
1058 |
} |
1059 |
|
1060 |
/* OK, we are done with that, now set up the arg stuff,
|
1061 |
and then start this sucker up */
|
1062 |
|
1063 |
{ |
1064 |
char * passed_p;
|
1065 |
|
1066 |
if (interpreter_type == INTERPRETER_AOUT) {
|
1067 |
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
1068 |
passed_p = passed_fileno; |
1069 |
|
1070 |
if (elf_interpreter) {
|
1071 |
bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
|
1072 |
bprm->argc++; |
1073 |
} |
1074 |
} |
1075 |
if (!bprm->p) {
|
1076 |
if (elf_interpreter) {
|
1077 |
free(elf_interpreter); |
1078 |
} |
1079 |
free (elf_phdata); |
1080 |
close(bprm->fd); |
1081 |
return -E2BIG;
|
1082 |
} |
1083 |
} |
1084 |
|
1085 |
/* OK, This is the point of no return */
|
1086 |
info->end_data = 0;
|
1087 |
info->end_code = 0;
|
1088 |
info->start_mmap = (unsigned long)ELF_START_MMAP; |
1089 |
info->mmap = 0;
|
1090 |
elf_entry = (unsigned long) elf_ex.e_entry; |
1091 |
|
1092 |
/* Do this so that we can load the interpreter, if need be. We will
|
1093 |
change some of these later */
|
1094 |
info->rss = 0;
|
1095 |
bprm->p = setup_arg_pages(bprm->p, bprm, info); |
1096 |
info->start_stack = bprm->p; |
1097 |
|
1098 |
/* Now we do a little grungy work by mmaping the ELF image into
|
1099 |
* the correct location in memory. At this point, we assume that
|
1100 |
* the image should be loaded at fixed address, not at a variable
|
1101 |
* address.
|
1102 |
*/
|
1103 |
|
1104 |
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
1105 |
int elf_prot = 0; |
1106 |
int elf_flags = 0; |
1107 |
unsigned long error; |
1108 |
|
1109 |
if (elf_ppnt->p_type != PT_LOAD)
|
1110 |
continue;
|
1111 |
|
1112 |
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
1113 |
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1114 |
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1115 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE; |
1116 |
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
1117 |
elf_flags |= MAP_FIXED; |
1118 |
} else if (elf_ex.e_type == ET_DYN) { |
1119 |
/* Try and get dynamic programs out of the way of the default mmap
|
1120 |
base, as well as whatever program they might try to exec. This
|
1121 |
is because the brk will follow the loader, and is not movable. */
|
1122 |
/* NOTE: for qemu, we do a big mmap to get enough space
|
1123 |
without harcoding any address */
|
1124 |
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
1125 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1126 |
-1, 0); |
1127 |
if (error == -1) { |
1128 |
perror("mmap");
|
1129 |
exit(-1);
|
1130 |
} |
1131 |
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
1132 |
} |
1133 |
|
1134 |
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1135 |
(elf_ppnt->p_filesz + |
1136 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), |
1137 |
elf_prot, |
1138 |
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), |
1139 |
bprm->fd, |
1140 |
(elf_ppnt->p_offset - |
1141 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
1142 |
if (error == -1) { |
1143 |
perror("mmap");
|
1144 |
exit(-1);
|
1145 |
} |
1146 |
|
1147 |
#ifdef LOW_ELF_STACK
|
1148 |
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
1149 |
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); |
1150 |
#endif
|
1151 |
|
1152 |
if (!load_addr_set) {
|
1153 |
load_addr_set = 1;
|
1154 |
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; |
1155 |
if (elf_ex.e_type == ET_DYN) {
|
1156 |
load_bias += error - |
1157 |
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
1158 |
load_addr += load_bias; |
1159 |
} |
1160 |
} |
1161 |
k = elf_ppnt->p_vaddr; |
1162 |
if (k < start_code)
|
1163 |
start_code = k; |
1164 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
1165 |
if (k > elf_bss)
|
1166 |
elf_bss = k; |
1167 |
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
1168 |
end_code = k; |
1169 |
if (end_data < k)
|
1170 |
end_data = k; |
1171 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
1172 |
if (k > elf_brk) elf_brk = k;
|
1173 |
} |
1174 |
|
1175 |
elf_entry += load_bias; |
1176 |
elf_bss += load_bias; |
1177 |
elf_brk += load_bias; |
1178 |
start_code += load_bias; |
1179 |
end_code += load_bias; |
1180 |
// start_data += load_bias;
|
1181 |
end_data += load_bias; |
1182 |
|
1183 |
if (elf_interpreter) {
|
1184 |
if (interpreter_type & 1) { |
1185 |
elf_entry = load_aout_interp(&interp_ex, interpreter_fd); |
1186 |
} |
1187 |
else if (interpreter_type & 2) { |
1188 |
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, |
1189 |
&interp_load_addr); |
1190 |
} |
1191 |
|
1192 |
close(interpreter_fd); |
1193 |
free(elf_interpreter); |
1194 |
|
1195 |
if (elf_entry == ~0UL) { |
1196 |
printf("Unable to load interpreter\n");
|
1197 |
free(elf_phdata); |
1198 |
exit(-1);
|
1199 |
return 0; |
1200 |
} |
1201 |
} |
1202 |
|
1203 |
free(elf_phdata); |
1204 |
|
1205 |
if (loglevel)
|
1206 |
load_symbols(&elf_ex, bprm->fd); |
1207 |
|
1208 |
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
1209 |
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); |
1210 |
|
1211 |
#ifdef LOW_ELF_STACK
|
1212 |
info->start_stack = bprm->p = elf_stack - 4;
|
1213 |
#endif
|
1214 |
bprm->p = create_elf_tables(bprm->p, |
1215 |
bprm->argc, |
1216 |
bprm->envc, |
1217 |
&elf_ex, |
1218 |
load_addr, load_bias, |
1219 |
interp_load_addr, |
1220 |
(interpreter_type == INTERPRETER_AOUT ? 0 : 1), |
1221 |
info); |
1222 |
info->start_brk = info->brk = elf_brk; |
1223 |
info->end_code = end_code; |
1224 |
info->start_code = start_code; |
1225 |
info->start_data = end_code; |
1226 |
info->end_data = end_data; |
1227 |
info->start_stack = bprm->p; |
1228 |
|
1229 |
/* Calling set_brk effectively mmaps the pages that we need for the bss and break
|
1230 |
sections */
|
1231 |
set_brk(elf_bss, elf_brk); |
1232 |
|
1233 |
padzero(elf_bss, elf_brk); |
1234 |
|
1235 |
#if 0
|
1236 |
printf("(start_brk) %x\n" , info->start_brk);
|
1237 |
printf("(end_code) %x\n" , info->end_code);
|
1238 |
printf("(start_code) %x\n" , info->start_code);
|
1239 |
printf("(end_data) %x\n" , info->end_data);
|
1240 |
printf("(start_stack) %x\n" , info->start_stack);
|
1241 |
printf("(brk) %x\n" , info->brk);
|
1242 |
#endif
|
1243 |
|
1244 |
if ( info->personality == PER_SVR4 )
|
1245 |
{ |
1246 |
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
1247 |
and some applications "depend" upon this behavior.
|
1248 |
Since we do not have the power to recompile these, we
|
1249 |
emulate the SVr4 behavior. Sigh. */
|
1250 |
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
1251 |
MAP_FIXED | MAP_PRIVATE, -1, 0); |
1252 |
} |
1253 |
|
1254 |
info->entry = elf_entry; |
1255 |
|
1256 |
return 0; |
1257 |
} |
1258 |
|
1259 |
static int load_aout_interp(void * exptr, int interp_fd) |
1260 |
{ |
1261 |
printf("a.out interpreter not yet supported\n");
|
1262 |
return(0); |
1263 |
} |
1264 |
|
1265 |
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
1266 |
{ |
1267 |
init_thread(regs, infop); |
1268 |
} |