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Commit | Line | Data |
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31e31b8a | 1 | /* This is the Linux kernel elf-loading code, ported into user space */ |
edf8e2af MW |
2 | #include <sys/time.h> |
3 | #include <sys/param.h> | |
31e31b8a FB |
4 | |
5 | #include <stdio.h> | |
6 | #include <sys/types.h> | |
7 | #include <fcntl.h> | |
31e31b8a FB |
8 | #include <errno.h> |
9 | #include <unistd.h> | |
10 | #include <sys/mman.h> | |
edf8e2af | 11 | #include <sys/resource.h> |
31e31b8a FB |
12 | #include <stdlib.h> |
13 | #include <string.h> | |
edf8e2af | 14 | #include <time.h> |
31e31b8a | 15 | |
3ef693a0 | 16 | #include "qemu.h" |
689f936f | 17 | #include "disas.h" |
31e31b8a | 18 | |
e58ffeb3 | 19 | #ifdef _ARCH_PPC64 |
a6cc84f4 | 20 | #undef ARCH_DLINFO |
21 | #undef ELF_PLATFORM | |
22 | #undef ELF_HWCAP | |
23 | #undef ELF_CLASS | |
24 | #undef ELF_DATA | |
25 | #undef ELF_ARCH | |
26 | #endif | |
27 | ||
edf8e2af MW |
28 | #define ELF_OSABI ELFOSABI_SYSV |
29 | ||
cb33da57 BS |
30 | /* from personality.h */ |
31 | ||
32 | /* | |
33 | * Flags for bug emulation. | |
34 | * | |
35 | * These occupy the top three bytes. | |
36 | */ | |
37 | enum { | |
38 | ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ | |
39 | FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors | |
40 | * (signal handling) | |
41 | */ | |
42 | MMAP_PAGE_ZERO = 0x0100000, | |
43 | ADDR_COMPAT_LAYOUT = 0x0200000, | |
44 | READ_IMPLIES_EXEC = 0x0400000, | |
45 | ADDR_LIMIT_32BIT = 0x0800000, | |
46 | SHORT_INODE = 0x1000000, | |
47 | WHOLE_SECONDS = 0x2000000, | |
48 | STICKY_TIMEOUTS = 0x4000000, | |
49 | ADDR_LIMIT_3GB = 0x8000000, | |
50 | }; | |
51 | ||
52 | /* | |
53 | * Personality types. | |
54 | * | |
55 | * These go in the low byte. Avoid using the top bit, it will | |
56 | * conflict with error returns. | |
57 | */ | |
58 | enum { | |
59 | PER_LINUX = 0x0000, | |
60 | PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, | |
61 | PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, | |
62 | PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
63 | PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, | |
64 | PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | | |
65 | WHOLE_SECONDS | SHORT_INODE, | |
66 | PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, | |
67 | PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, | |
68 | PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, | |
69 | PER_BSD = 0x0006, | |
70 | PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, | |
71 | PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, | |
72 | PER_LINUX32 = 0x0008, | |
73 | PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, | |
74 | PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ | |
75 | PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ | |
76 | PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ | |
77 | PER_RISCOS = 0x000c, | |
78 | PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, | |
79 | PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
80 | PER_OSF4 = 0x000f, /* OSF/1 v4 */ | |
81 | PER_HPUX = 0x0010, | |
82 | PER_MASK = 0x00ff, | |
83 | }; | |
84 | ||
85 | /* | |
86 | * Return the base personality without flags. | |
87 | */ | |
88 | #define personality(pers) (pers & PER_MASK) | |
89 | ||
83fb7adf FB |
90 | /* this flag is uneffective under linux too, should be deleted */ |
91 | #ifndef MAP_DENYWRITE | |
92 | #define MAP_DENYWRITE 0 | |
93 | #endif | |
94 | ||
95 | /* should probably go in elf.h */ | |
96 | #ifndef ELIBBAD | |
97 | #define ELIBBAD 80 | |
98 | #endif | |
99 | ||
21e807fa NF |
100 | typedef target_ulong target_elf_greg_t; |
101 | #ifdef USE_UID16 | |
102 | typedef uint16_t target_uid_t; | |
103 | typedef uint16_t target_gid_t; | |
104 | #else | |
105 | typedef uint32_t target_uid_t; | |
106 | typedef uint32_t target_gid_t; | |
107 | #endif | |
108 | typedef int32_t target_pid_t; | |
109 | ||
30ac07d4 FB |
110 | #ifdef TARGET_I386 |
111 | ||
15338fd7 FB |
112 | #define ELF_PLATFORM get_elf_platform() |
113 | ||
114 | static const char *get_elf_platform(void) | |
115 | { | |
116 | static char elf_platform[] = "i386"; | |
d5975363 | 117 | int family = (thread_env->cpuid_version >> 8) & 0xff; |
15338fd7 FB |
118 | if (family > 6) |
119 | family = 6; | |
120 | if (family >= 3) | |
121 | elf_platform[1] = '0' + family; | |
122 | return elf_platform; | |
123 | } | |
124 | ||
125 | #define ELF_HWCAP get_elf_hwcap() | |
126 | ||
127 | static uint32_t get_elf_hwcap(void) | |
128 | { | |
d5975363 | 129 | return thread_env->cpuid_features; |
15338fd7 FB |
130 | } |
131 | ||
84409ddb JM |
132 | #ifdef TARGET_X86_64 |
133 | #define ELF_START_MMAP 0x2aaaaab000ULL | |
134 | #define elf_check_arch(x) ( ((x) == ELF_ARCH) ) | |
135 | ||
136 | #define ELF_CLASS ELFCLASS64 | |
137 | #define ELF_DATA ELFDATA2LSB | |
138 | #define ELF_ARCH EM_X86_64 | |
139 | ||
140 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
141 | { | |
142 | regs->rax = 0; | |
143 | regs->rsp = infop->start_stack; | |
144 | regs->rip = infop->entry; | |
145 | } | |
146 | ||
9edc5d79 | 147 | #define ELF_NREG 27 |
c227f099 | 148 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
9edc5d79 MW |
149 | |
150 | /* | |
151 | * Note that ELF_NREG should be 29 as there should be place for | |
152 | * TRAPNO and ERR "registers" as well but linux doesn't dump | |
153 | * those. | |
154 | * | |
155 | * See linux kernel: arch/x86/include/asm/elf.h | |
156 | */ | |
c227f099 | 157 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
9edc5d79 MW |
158 | { |
159 | (*regs)[0] = env->regs[15]; | |
160 | (*regs)[1] = env->regs[14]; | |
161 | (*regs)[2] = env->regs[13]; | |
162 | (*regs)[3] = env->regs[12]; | |
163 | (*regs)[4] = env->regs[R_EBP]; | |
164 | (*regs)[5] = env->regs[R_EBX]; | |
165 | (*regs)[6] = env->regs[11]; | |
166 | (*regs)[7] = env->regs[10]; | |
167 | (*regs)[8] = env->regs[9]; | |
168 | (*regs)[9] = env->regs[8]; | |
169 | (*regs)[10] = env->regs[R_EAX]; | |
170 | (*regs)[11] = env->regs[R_ECX]; | |
171 | (*regs)[12] = env->regs[R_EDX]; | |
172 | (*regs)[13] = env->regs[R_ESI]; | |
173 | (*regs)[14] = env->regs[R_EDI]; | |
174 | (*regs)[15] = env->regs[R_EAX]; /* XXX */ | |
175 | (*regs)[16] = env->eip; | |
176 | (*regs)[17] = env->segs[R_CS].selector & 0xffff; | |
177 | (*regs)[18] = env->eflags; | |
178 | (*regs)[19] = env->regs[R_ESP]; | |
179 | (*regs)[20] = env->segs[R_SS].selector & 0xffff; | |
180 | (*regs)[21] = env->segs[R_FS].selector & 0xffff; | |
181 | (*regs)[22] = env->segs[R_GS].selector & 0xffff; | |
182 | (*regs)[23] = env->segs[R_DS].selector & 0xffff; | |
183 | (*regs)[24] = env->segs[R_ES].selector & 0xffff; | |
184 | (*regs)[25] = env->segs[R_FS].selector & 0xffff; | |
185 | (*regs)[26] = env->segs[R_GS].selector & 0xffff; | |
186 | } | |
187 | ||
84409ddb JM |
188 | #else |
189 | ||
30ac07d4 FB |
190 | #define ELF_START_MMAP 0x80000000 |
191 | ||
30ac07d4 FB |
192 | /* |
193 | * This is used to ensure we don't load something for the wrong architecture. | |
194 | */ | |
195 | #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) | |
196 | ||
197 | /* | |
198 | * These are used to set parameters in the core dumps. | |
199 | */ | |
200 | #define ELF_CLASS ELFCLASS32 | |
201 | #define ELF_DATA ELFDATA2LSB | |
202 | #define ELF_ARCH EM_386 | |
203 | ||
b346ff46 FB |
204 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
205 | { | |
206 | regs->esp = infop->start_stack; | |
207 | regs->eip = infop->entry; | |
e5fe0c52 PB |
208 | |
209 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
210 | starts %edx contains a pointer to a function which might be | |
211 | registered using `atexit'. This provides a mean for the | |
212 | dynamic linker to call DT_FINI functions for shared libraries | |
213 | that have been loaded before the code runs. | |
214 | ||
215 | A value of 0 tells we have no such handler. */ | |
216 | regs->edx = 0; | |
b346ff46 | 217 | } |
9edc5d79 | 218 | |
9edc5d79 | 219 | #define ELF_NREG 17 |
c227f099 | 220 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
9edc5d79 MW |
221 | |
222 | /* | |
223 | * Note that ELF_NREG should be 19 as there should be place for | |
224 | * TRAPNO and ERR "registers" as well but linux doesn't dump | |
225 | * those. | |
226 | * | |
227 | * See linux kernel: arch/x86/include/asm/elf.h | |
228 | */ | |
c227f099 | 229 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
9edc5d79 MW |
230 | { |
231 | (*regs)[0] = env->regs[R_EBX]; | |
232 | (*regs)[1] = env->regs[R_ECX]; | |
233 | (*regs)[2] = env->regs[R_EDX]; | |
234 | (*regs)[3] = env->regs[R_ESI]; | |
235 | (*regs)[4] = env->regs[R_EDI]; | |
236 | (*regs)[5] = env->regs[R_EBP]; | |
237 | (*regs)[6] = env->regs[R_EAX]; | |
238 | (*regs)[7] = env->segs[R_DS].selector & 0xffff; | |
239 | (*regs)[8] = env->segs[R_ES].selector & 0xffff; | |
240 | (*regs)[9] = env->segs[R_FS].selector & 0xffff; | |
241 | (*regs)[10] = env->segs[R_GS].selector & 0xffff; | |
242 | (*regs)[11] = env->regs[R_EAX]; /* XXX */ | |
243 | (*regs)[12] = env->eip; | |
244 | (*regs)[13] = env->segs[R_CS].selector & 0xffff; | |
245 | (*regs)[14] = env->eflags; | |
246 | (*regs)[15] = env->regs[R_ESP]; | |
247 | (*regs)[16] = env->segs[R_SS].selector & 0xffff; | |
248 | } | |
84409ddb | 249 | #endif |
b346ff46 | 250 | |
9edc5d79 | 251 | #define USE_ELF_CORE_DUMP |
b346ff46 FB |
252 | #define ELF_EXEC_PAGESIZE 4096 |
253 | ||
254 | #endif | |
255 | ||
256 | #ifdef TARGET_ARM | |
257 | ||
258 | #define ELF_START_MMAP 0x80000000 | |
259 | ||
260 | #define elf_check_arch(x) ( (x) == EM_ARM ) | |
261 | ||
262 | #define ELF_CLASS ELFCLASS32 | |
263 | #ifdef TARGET_WORDS_BIGENDIAN | |
264 | #define ELF_DATA ELFDATA2MSB | |
265 | #else | |
266 | #define ELF_DATA ELFDATA2LSB | |
267 | #endif | |
268 | #define ELF_ARCH EM_ARM | |
269 | ||
b346ff46 FB |
270 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
271 | { | |
992f48a0 | 272 | abi_long stack = infop->start_stack; |
b346ff46 FB |
273 | memset(regs, 0, sizeof(*regs)); |
274 | regs->ARM_cpsr = 0x10; | |
0240ded8 PB |
275 | if (infop->entry & 1) |
276 | regs->ARM_cpsr |= CPSR_T; | |
277 | regs->ARM_pc = infop->entry & 0xfffffffe; | |
b346ff46 | 278 | regs->ARM_sp = infop->start_stack; |
2f619698 FB |
279 | /* FIXME - what to for failure of get_user()? */ |
280 | get_user_ual(regs->ARM_r2, stack + 8); /* envp */ | |
281 | get_user_ual(regs->ARM_r1, stack + 4); /* envp */ | |
a1516e92 | 282 | /* XXX: it seems that r0 is zeroed after ! */ |
e5fe0c52 PB |
283 | regs->ARM_r0 = 0; |
284 | /* For uClinux PIC binaries. */ | |
863cf0b7 | 285 | /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ |
e5fe0c52 | 286 | regs->ARM_r10 = infop->start_data; |
b346ff46 FB |
287 | } |
288 | ||
edf8e2af | 289 | #define ELF_NREG 18 |
c227f099 | 290 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
edf8e2af | 291 | |
c227f099 | 292 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
edf8e2af | 293 | { |
d049e626 NF |
294 | (*regs)[0] = tswapl(env->regs[0]); |
295 | (*regs)[1] = tswapl(env->regs[1]); | |
296 | (*regs)[2] = tswapl(env->regs[2]); | |
297 | (*regs)[3] = tswapl(env->regs[3]); | |
298 | (*regs)[4] = tswapl(env->regs[4]); | |
299 | (*regs)[5] = tswapl(env->regs[5]); | |
300 | (*regs)[6] = tswapl(env->regs[6]); | |
301 | (*regs)[7] = tswapl(env->regs[7]); | |
302 | (*regs)[8] = tswapl(env->regs[8]); | |
303 | (*regs)[9] = tswapl(env->regs[9]); | |
304 | (*regs)[10] = tswapl(env->regs[10]); | |
305 | (*regs)[11] = tswapl(env->regs[11]); | |
306 | (*regs)[12] = tswapl(env->regs[12]); | |
307 | (*regs)[13] = tswapl(env->regs[13]); | |
308 | (*regs)[14] = tswapl(env->regs[14]); | |
309 | (*regs)[15] = tswapl(env->regs[15]); | |
310 | ||
311 | (*regs)[16] = tswapl(cpsr_read((CPUState *)env)); | |
312 | (*regs)[17] = tswapl(env->regs[0]); /* XXX */ | |
edf8e2af MW |
313 | } |
314 | ||
30ac07d4 FB |
315 | #define USE_ELF_CORE_DUMP |
316 | #define ELF_EXEC_PAGESIZE 4096 | |
317 | ||
afce2927 FB |
318 | enum |
319 | { | |
320 | ARM_HWCAP_ARM_SWP = 1 << 0, | |
321 | ARM_HWCAP_ARM_HALF = 1 << 1, | |
322 | ARM_HWCAP_ARM_THUMB = 1 << 2, | |
323 | ARM_HWCAP_ARM_26BIT = 1 << 3, | |
324 | ARM_HWCAP_ARM_FAST_MULT = 1 << 4, | |
325 | ARM_HWCAP_ARM_FPA = 1 << 5, | |
326 | ARM_HWCAP_ARM_VFP = 1 << 6, | |
327 | ARM_HWCAP_ARM_EDSP = 1 << 7, | |
cf6de34a RV |
328 | ARM_HWCAP_ARM_JAVA = 1 << 8, |
329 | ARM_HWCAP_ARM_IWMMXT = 1 << 9, | |
330 | ARM_HWCAP_ARM_THUMBEE = 1 << 10, | |
331 | ARM_HWCAP_ARM_NEON = 1 << 11, | |
332 | ARM_HWCAP_ARM_VFPv3 = 1 << 12, | |
333 | ARM_HWCAP_ARM_VFPv3D16 = 1 << 13, | |
afce2927 FB |
334 | }; |
335 | ||
15338fd7 | 336 | #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \ |
afce2927 | 337 | | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
cf6de34a RV |
338 | | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \ |
339 | | ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 ) | |
afce2927 | 340 | |
30ac07d4 FB |
341 | #endif |
342 | ||
853d6f7a | 343 | #ifdef TARGET_SPARC |
a315a145 | 344 | #ifdef TARGET_SPARC64 |
853d6f7a FB |
345 | |
346 | #define ELF_START_MMAP 0x80000000 | |
347 | ||
992f48a0 | 348 | #ifndef TARGET_ABI32 |
cb33da57 | 349 | #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS ) |
992f48a0 BS |
350 | #else |
351 | #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC ) | |
352 | #endif | |
853d6f7a | 353 | |
a315a145 FB |
354 | #define ELF_CLASS ELFCLASS64 |
355 | #define ELF_DATA ELFDATA2MSB | |
5ef54116 FB |
356 | #define ELF_ARCH EM_SPARCV9 |
357 | ||
358 | #define STACK_BIAS 2047 | |
a315a145 | 359 | |
a315a145 FB |
360 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
361 | { | |
992f48a0 | 362 | #ifndef TARGET_ABI32 |
a315a145 | 363 | regs->tstate = 0; |
992f48a0 | 364 | #endif |
a315a145 FB |
365 | regs->pc = infop->entry; |
366 | regs->npc = regs->pc + 4; | |
367 | regs->y = 0; | |
992f48a0 BS |
368 | #ifdef TARGET_ABI32 |
369 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
370 | #else | |
cb33da57 BS |
371 | if (personality(infop->personality) == PER_LINUX32) |
372 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
373 | else | |
374 | regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; | |
992f48a0 | 375 | #endif |
a315a145 FB |
376 | } |
377 | ||
378 | #else | |
379 | #define ELF_START_MMAP 0x80000000 | |
380 | ||
381 | #define elf_check_arch(x) ( (x) == EM_SPARC ) | |
382 | ||
853d6f7a FB |
383 | #define ELF_CLASS ELFCLASS32 |
384 | #define ELF_DATA ELFDATA2MSB | |
385 | #define ELF_ARCH EM_SPARC | |
386 | ||
853d6f7a FB |
387 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
388 | { | |
f5155289 FB |
389 | regs->psr = 0; |
390 | regs->pc = infop->entry; | |
391 | regs->npc = regs->pc + 4; | |
392 | regs->y = 0; | |
393 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
853d6f7a FB |
394 | } |
395 | ||
a315a145 | 396 | #endif |
853d6f7a FB |
397 | #endif |
398 | ||
67867308 FB |
399 | #ifdef TARGET_PPC |
400 | ||
401 | #define ELF_START_MMAP 0x80000000 | |
402 | ||
e85e7c6e | 403 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) |
84409ddb JM |
404 | |
405 | #define elf_check_arch(x) ( (x) == EM_PPC64 ) | |
406 | ||
407 | #define ELF_CLASS ELFCLASS64 | |
408 | ||
409 | #else | |
410 | ||
67867308 FB |
411 | #define elf_check_arch(x) ( (x) == EM_PPC ) |
412 | ||
413 | #define ELF_CLASS ELFCLASS32 | |
84409ddb JM |
414 | |
415 | #endif | |
416 | ||
67867308 FB |
417 | #ifdef TARGET_WORDS_BIGENDIAN |
418 | #define ELF_DATA ELFDATA2MSB | |
419 | #else | |
420 | #define ELF_DATA ELFDATA2LSB | |
421 | #endif | |
422 | #define ELF_ARCH EM_PPC | |
423 | ||
df84e4f3 NF |
424 | /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP). |
425 | See arch/powerpc/include/asm/cputable.h. */ | |
426 | enum { | |
3efa9a67 | 427 | QEMU_PPC_FEATURE_32 = 0x80000000, |
428 | QEMU_PPC_FEATURE_64 = 0x40000000, | |
429 | QEMU_PPC_FEATURE_601_INSTR = 0x20000000, | |
430 | QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000, | |
431 | QEMU_PPC_FEATURE_HAS_FPU = 0x08000000, | |
432 | QEMU_PPC_FEATURE_HAS_MMU = 0x04000000, | |
433 | QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000, | |
434 | QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000, | |
435 | QEMU_PPC_FEATURE_HAS_SPE = 0x00800000, | |
436 | QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000, | |
437 | QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000, | |
438 | QEMU_PPC_FEATURE_NO_TB = 0x00100000, | |
439 | QEMU_PPC_FEATURE_POWER4 = 0x00080000, | |
440 | QEMU_PPC_FEATURE_POWER5 = 0x00040000, | |
441 | QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000, | |
442 | QEMU_PPC_FEATURE_CELL = 0x00010000, | |
443 | QEMU_PPC_FEATURE_BOOKE = 0x00008000, | |
444 | QEMU_PPC_FEATURE_SMT = 0x00004000, | |
445 | QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000, | |
446 | QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000, | |
447 | QEMU_PPC_FEATURE_PA6T = 0x00000800, | |
448 | QEMU_PPC_FEATURE_HAS_DFP = 0x00000400, | |
449 | QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200, | |
450 | QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100, | |
451 | QEMU_PPC_FEATURE_HAS_VSX = 0x00000080, | |
452 | QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040, | |
453 | ||
454 | QEMU_PPC_FEATURE_TRUE_LE = 0x00000002, | |
455 | QEMU_PPC_FEATURE_PPC_LE = 0x00000001, | |
df84e4f3 NF |
456 | }; |
457 | ||
458 | #define ELF_HWCAP get_elf_hwcap() | |
459 | ||
460 | static uint32_t get_elf_hwcap(void) | |
461 | { | |
462 | CPUState *e = thread_env; | |
463 | uint32_t features = 0; | |
464 | ||
465 | /* We don't have to be terribly complete here; the high points are | |
466 | Altivec/FP/SPE support. Anything else is just a bonus. */ | |
467 | #define GET_FEATURE(flag, feature) \ | |
468 | do {if (e->insns_flags & flag) features |= feature; } while(0) | |
3efa9a67 | 469 | GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); |
470 | GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); | |
471 | GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); | |
472 | GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); | |
473 | GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); | |
474 | GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); | |
475 | GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); | |
476 | GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); | |
df84e4f3 NF |
477 | #undef GET_FEATURE |
478 | ||
479 | return features; | |
480 | } | |
481 | ||
f5155289 FB |
482 | /* |
483 | * We need to put in some extra aux table entries to tell glibc what | |
484 | * the cache block size is, so it can use the dcbz instruction safely. | |
485 | */ | |
486 | #define AT_DCACHEBSIZE 19 | |
487 | #define AT_ICACHEBSIZE 20 | |
488 | #define AT_UCACHEBSIZE 21 | |
489 | /* A special ignored type value for PPC, for glibc compatibility. */ | |
490 | #define AT_IGNOREPPC 22 | |
491 | /* | |
492 | * The requirements here are: | |
493 | * - keep the final alignment of sp (sp & 0xf) | |
494 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
495 | * AUXV is greater than 16 for glibc compatibility. | |
496 | * AT_IGNOREPPC is used for that. | |
497 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
498 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
499 | */ | |
0bccf03d | 500 | #define DLINFO_ARCH_ITEMS 5 |
f5155289 FB |
501 | #define ARCH_DLINFO \ |
502 | do { \ | |
0bccf03d FB |
503 | NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \ |
504 | NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \ | |
505 | NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ | |
f5155289 FB |
506 | /* \ |
507 | * Now handle glibc compatibility. \ | |
508 | */ \ | |
0bccf03d FB |
509 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
510 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
f5155289 FB |
511 | } while (0) |
512 | ||
67867308 FB |
513 | static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
514 | { | |
992f48a0 BS |
515 | abi_ulong pos = infop->start_stack; |
516 | abi_ulong tmp; | |
e85e7c6e | 517 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) |
992f48a0 | 518 | abi_ulong entry, toc; |
84409ddb | 519 | #endif |
e5fe0c52 | 520 | |
67867308 | 521 | _regs->gpr[1] = infop->start_stack; |
e85e7c6e | 522 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) |
84409ddb JM |
523 | entry = ldq_raw(infop->entry) + infop->load_addr; |
524 | toc = ldq_raw(infop->entry + 8) + infop->load_addr; | |
525 | _regs->gpr[2] = toc; | |
526 | infop->entry = entry; | |
527 | #endif | |
67867308 | 528 | _regs->nip = infop->entry; |
e5fe0c52 PB |
529 | /* Note that isn't exactly what regular kernel does |
530 | * but this is what the ABI wants and is needed to allow | |
531 | * execution of PPC BSD programs. | |
532 | */ | |
2f619698 FB |
533 | /* FIXME - what to for failure of get_user()? */ |
534 | get_user_ual(_regs->gpr[3], pos); | |
992f48a0 | 535 | pos += sizeof(abi_ulong); |
e5fe0c52 | 536 | _regs->gpr[4] = pos; |
992f48a0 | 537 | for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong)) |
e5fe0c52 PB |
538 | tmp = ldl(pos); |
539 | _regs->gpr[5] = pos; | |
67867308 FB |
540 | } |
541 | ||
e2f3e741 NF |
542 | /* See linux kernel: arch/powerpc/include/asm/elf.h. */ |
543 | #define ELF_NREG 48 | |
544 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
545 | ||
546 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
547 | { | |
548 | int i; | |
549 | target_ulong ccr = 0; | |
550 | ||
551 | for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { | |
552 | (*regs)[i] = tswapl(env->gpr[i]); | |
553 | } | |
554 | ||
555 | (*regs)[32] = tswapl(env->nip); | |
556 | (*regs)[33] = tswapl(env->msr); | |
557 | (*regs)[35] = tswapl(env->ctr); | |
558 | (*regs)[36] = tswapl(env->lr); | |
559 | (*regs)[37] = tswapl(env->xer); | |
560 | ||
561 | for (i = 0; i < ARRAY_SIZE(env->crf); i++) { | |
562 | ccr |= env->crf[i] << (32 - ((i + 1) * 4)); | |
563 | } | |
564 | (*regs)[38] = tswapl(ccr); | |
565 | } | |
566 | ||
567 | #define USE_ELF_CORE_DUMP | |
67867308 FB |
568 | #define ELF_EXEC_PAGESIZE 4096 |
569 | ||
570 | #endif | |
571 | ||
048f6b4d FB |
572 | #ifdef TARGET_MIPS |
573 | ||
574 | #define ELF_START_MMAP 0x80000000 | |
575 | ||
576 | #define elf_check_arch(x) ( (x) == EM_MIPS ) | |
577 | ||
388bb21a TS |
578 | #ifdef TARGET_MIPS64 |
579 | #define ELF_CLASS ELFCLASS64 | |
580 | #else | |
048f6b4d | 581 | #define ELF_CLASS ELFCLASS32 |
388bb21a | 582 | #endif |
048f6b4d FB |
583 | #ifdef TARGET_WORDS_BIGENDIAN |
584 | #define ELF_DATA ELFDATA2MSB | |
585 | #else | |
586 | #define ELF_DATA ELFDATA2LSB | |
587 | #endif | |
588 | #define ELF_ARCH EM_MIPS | |
589 | ||
048f6b4d FB |
590 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
591 | { | |
623a930e | 592 | regs->cp0_status = 2 << CP0St_KSU; |
048f6b4d FB |
593 | regs->cp0_epc = infop->entry; |
594 | regs->regs[29] = infop->start_stack; | |
595 | } | |
596 | ||
51e52606 NF |
597 | /* See linux kernel: arch/mips/include/asm/elf.h. */ |
598 | #define ELF_NREG 45 | |
599 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
600 | ||
601 | /* See linux kernel: arch/mips/include/asm/reg.h. */ | |
602 | enum { | |
603 | #ifdef TARGET_MIPS64 | |
604 | TARGET_EF_R0 = 0, | |
605 | #else | |
606 | TARGET_EF_R0 = 6, | |
607 | #endif | |
608 | TARGET_EF_R26 = TARGET_EF_R0 + 26, | |
609 | TARGET_EF_R27 = TARGET_EF_R0 + 27, | |
610 | TARGET_EF_LO = TARGET_EF_R0 + 32, | |
611 | TARGET_EF_HI = TARGET_EF_R0 + 33, | |
612 | TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34, | |
613 | TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35, | |
614 | TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36, | |
615 | TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37 | |
616 | }; | |
617 | ||
618 | /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ | |
619 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
620 | { | |
621 | int i; | |
622 | ||
623 | for (i = 0; i < TARGET_EF_R0; i++) { | |
624 | (*regs)[i] = 0; | |
625 | } | |
626 | (*regs)[TARGET_EF_R0] = 0; | |
627 | ||
628 | for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { | |
629 | (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]); | |
630 | } | |
631 | ||
632 | (*regs)[TARGET_EF_R26] = 0; | |
633 | (*regs)[TARGET_EF_R27] = 0; | |
634 | (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]); | |
635 | (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]); | |
636 | (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC); | |
637 | (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr); | |
638 | (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status); | |
639 | (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause); | |
640 | } | |
641 | ||
642 | #define USE_ELF_CORE_DUMP | |
388bb21a TS |
643 | #define ELF_EXEC_PAGESIZE 4096 |
644 | ||
048f6b4d FB |
645 | #endif /* TARGET_MIPS */ |
646 | ||
b779e29e EI |
647 | #ifdef TARGET_MICROBLAZE |
648 | ||
649 | #define ELF_START_MMAP 0x80000000 | |
650 | ||
651 | #define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE ) | |
652 | ||
653 | #define ELF_CLASS ELFCLASS32 | |
654 | #define ELF_DATA ELFDATA2MSB | |
655 | #define ELF_ARCH EM_MIPS | |
656 | ||
657 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
658 | { | |
659 | regs->pc = infop->entry; | |
660 | regs->r1 = infop->start_stack; | |
661 | ||
662 | } | |
663 | ||
b779e29e EI |
664 | #define ELF_EXEC_PAGESIZE 4096 |
665 | ||
666 | #endif /* TARGET_MICROBLAZE */ | |
667 | ||
fdf9b3e8 FB |
668 | #ifdef TARGET_SH4 |
669 | ||
670 | #define ELF_START_MMAP 0x80000000 | |
671 | ||
672 | #define elf_check_arch(x) ( (x) == EM_SH ) | |
673 | ||
674 | #define ELF_CLASS ELFCLASS32 | |
675 | #define ELF_DATA ELFDATA2LSB | |
676 | #define ELF_ARCH EM_SH | |
677 | ||
fdf9b3e8 FB |
678 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
679 | { | |
680 | /* Check other registers XXXXX */ | |
681 | regs->pc = infop->entry; | |
072ae847 | 682 | regs->regs[15] = infop->start_stack; |
fdf9b3e8 FB |
683 | } |
684 | ||
fdf9b3e8 FB |
685 | #define ELF_EXEC_PAGESIZE 4096 |
686 | ||
687 | #endif | |
688 | ||
48733d19 TS |
689 | #ifdef TARGET_CRIS |
690 | ||
691 | #define ELF_START_MMAP 0x80000000 | |
692 | ||
693 | #define elf_check_arch(x) ( (x) == EM_CRIS ) | |
694 | ||
695 | #define ELF_CLASS ELFCLASS32 | |
696 | #define ELF_DATA ELFDATA2LSB | |
697 | #define ELF_ARCH EM_CRIS | |
698 | ||
699 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
700 | { | |
701 | regs->erp = infop->entry; | |
702 | } | |
703 | ||
48733d19 TS |
704 | #define ELF_EXEC_PAGESIZE 8192 |
705 | ||
706 | #endif | |
707 | ||
e6e5906b PB |
708 | #ifdef TARGET_M68K |
709 | ||
710 | #define ELF_START_MMAP 0x80000000 | |
711 | ||
712 | #define elf_check_arch(x) ( (x) == EM_68K ) | |
713 | ||
714 | #define ELF_CLASS ELFCLASS32 | |
715 | #define ELF_DATA ELFDATA2MSB | |
716 | #define ELF_ARCH EM_68K | |
717 | ||
718 | /* ??? Does this need to do anything? | |
719 | #define ELF_PLAT_INIT(_r) */ | |
720 | ||
721 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
722 | { | |
723 | regs->usp = infop->start_stack; | |
724 | regs->sr = 0; | |
725 | regs->pc = infop->entry; | |
726 | } | |
727 | ||
e6e5906b PB |
728 | #define ELF_EXEC_PAGESIZE 8192 |
729 | ||
730 | #endif | |
731 | ||
7a3148a9 JM |
732 | #ifdef TARGET_ALPHA |
733 | ||
734 | #define ELF_START_MMAP (0x30000000000ULL) | |
735 | ||
736 | #define elf_check_arch(x) ( (x) == ELF_ARCH ) | |
737 | ||
738 | #define ELF_CLASS ELFCLASS64 | |
739 | #define ELF_DATA ELFDATA2MSB | |
740 | #define ELF_ARCH EM_ALPHA | |
741 | ||
742 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
743 | { | |
744 | regs->pc = infop->entry; | |
745 | regs->ps = 8; | |
746 | regs->usp = infop->start_stack; | |
7a3148a9 JM |
747 | } |
748 | ||
7a3148a9 JM |
749 | #define ELF_EXEC_PAGESIZE 8192 |
750 | ||
751 | #endif /* TARGET_ALPHA */ | |
752 | ||
15338fd7 FB |
753 | #ifndef ELF_PLATFORM |
754 | #define ELF_PLATFORM (NULL) | |
755 | #endif | |
756 | ||
757 | #ifndef ELF_HWCAP | |
758 | #define ELF_HWCAP 0 | |
759 | #endif | |
760 | ||
992f48a0 | 761 | #ifdef TARGET_ABI32 |
cb33da57 | 762 | #undef ELF_CLASS |
992f48a0 | 763 | #define ELF_CLASS ELFCLASS32 |
cb33da57 BS |
764 | #undef bswaptls |
765 | #define bswaptls(ptr) bswap32s(ptr) | |
766 | #endif | |
767 | ||
31e31b8a | 768 | #include "elf.h" |
09bfb054 | 769 | |
09bfb054 FB |
770 | struct exec |
771 | { | |
772 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ | |
773 | unsigned int a_text; /* length of text, in bytes */ | |
774 | unsigned int a_data; /* length of data, in bytes */ | |
775 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
776 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
777 | unsigned int a_entry; /* start address */ | |
778 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
779 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
780 | }; | |
781 | ||
782 | ||
783 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
784 | #define OMAGIC 0407 | |
785 | #define NMAGIC 0410 | |
786 | #define ZMAGIC 0413 | |
787 | #define QMAGIC 0314 | |
788 | ||
09bfb054 FB |
789 | /* max code+data+bss space allocated to elf interpreter */ |
790 | #define INTERP_MAP_SIZE (32 * 1024 * 1024) | |
791 | ||
792 | /* max code+data+bss+brk space allocated to ET_DYN executables */ | |
793 | #define ET_DYN_MAP_SIZE (128 * 1024 * 1024) | |
794 | ||
31e31b8a | 795 | /* Necessary parameters */ |
54936004 FB |
796 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE |
797 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) | |
798 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) | |
31e31b8a FB |
799 | |
800 | #define INTERPRETER_NONE 0 | |
801 | #define INTERPRETER_AOUT 1 | |
802 | #define INTERPRETER_ELF 2 | |
803 | ||
15338fd7 | 804 | #define DLINFO_ITEMS 12 |
31e31b8a | 805 | |
09bfb054 FB |
806 | static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
807 | { | |
808 | memcpy(to, from, n); | |
809 | } | |
d691f669 | 810 | |
31e31b8a FB |
811 | static int load_aout_interp(void * exptr, int interp_fd); |
812 | ||
813 | #ifdef BSWAP_NEEDED | |
92a31b1f | 814 | static void bswap_ehdr(struct elfhdr *ehdr) |
31e31b8a FB |
815 | { |
816 | bswap16s(&ehdr->e_type); /* Object file type */ | |
817 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
818 | bswap32s(&ehdr->e_version); /* Object file version */ | |
92a31b1f FB |
819 | bswaptls(&ehdr->e_entry); /* Entry point virtual address */ |
820 | bswaptls(&ehdr->e_phoff); /* Program header table file offset */ | |
821 | bswaptls(&ehdr->e_shoff); /* Section header table file offset */ | |
31e31b8a FB |
822 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ |
823 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
824 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
825 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
826 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
827 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
828 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
829 | } | |
830 | ||
92a31b1f | 831 | static void bswap_phdr(struct elf_phdr *phdr) |
31e31b8a FB |
832 | { |
833 | bswap32s(&phdr->p_type); /* Segment type */ | |
92a31b1f FB |
834 | bswaptls(&phdr->p_offset); /* Segment file offset */ |
835 | bswaptls(&phdr->p_vaddr); /* Segment virtual address */ | |
836 | bswaptls(&phdr->p_paddr); /* Segment physical address */ | |
837 | bswaptls(&phdr->p_filesz); /* Segment size in file */ | |
838 | bswaptls(&phdr->p_memsz); /* Segment size in memory */ | |
31e31b8a | 839 | bswap32s(&phdr->p_flags); /* Segment flags */ |
92a31b1f | 840 | bswaptls(&phdr->p_align); /* Segment alignment */ |
31e31b8a | 841 | } |
689f936f | 842 | |
92a31b1f | 843 | static void bswap_shdr(struct elf_shdr *shdr) |
689f936f FB |
844 | { |
845 | bswap32s(&shdr->sh_name); | |
846 | bswap32s(&shdr->sh_type); | |
92a31b1f FB |
847 | bswaptls(&shdr->sh_flags); |
848 | bswaptls(&shdr->sh_addr); | |
849 | bswaptls(&shdr->sh_offset); | |
850 | bswaptls(&shdr->sh_size); | |
689f936f FB |
851 | bswap32s(&shdr->sh_link); |
852 | bswap32s(&shdr->sh_info); | |
92a31b1f FB |
853 | bswaptls(&shdr->sh_addralign); |
854 | bswaptls(&shdr->sh_entsize); | |
689f936f FB |
855 | } |
856 | ||
7a3148a9 | 857 | static void bswap_sym(struct elf_sym *sym) |
689f936f FB |
858 | { |
859 | bswap32s(&sym->st_name); | |
7a3148a9 JM |
860 | bswaptls(&sym->st_value); |
861 | bswaptls(&sym->st_size); | |
689f936f FB |
862 | bswap16s(&sym->st_shndx); |
863 | } | |
31e31b8a FB |
864 | #endif |
865 | ||
edf8e2af MW |
866 | #ifdef USE_ELF_CORE_DUMP |
867 | static int elf_core_dump(int, const CPUState *); | |
868 | ||
869 | #ifdef BSWAP_NEEDED | |
870 | static void bswap_note(struct elf_note *en) | |
871 | { | |
9fdca5aa | 872 | bswap32s(&en->n_namesz); |
873 | bswap32s(&en->n_descsz); | |
874 | bswap32s(&en->n_type); | |
edf8e2af MW |
875 | } |
876 | #endif /* BSWAP_NEEDED */ | |
877 | ||
878 | #endif /* USE_ELF_CORE_DUMP */ | |
879 | ||
31e31b8a | 880 | /* |
e5fe0c52 | 881 | * 'copy_elf_strings()' copies argument/envelope strings from user |
31e31b8a FB |
882 | * memory to free pages in kernel mem. These are in a format ready |
883 | * to be put directly into the top of new user memory. | |
884 | * | |
885 | */ | |
992f48a0 BS |
886 | static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
887 | abi_ulong p) | |
31e31b8a FB |
888 | { |
889 | char *tmp, *tmp1, *pag = NULL; | |
890 | int len, offset = 0; | |
891 | ||
892 | if (!p) { | |
893 | return 0; /* bullet-proofing */ | |
894 | } | |
895 | while (argc-- > 0) { | |
edf779ff FB |
896 | tmp = argv[argc]; |
897 | if (!tmp) { | |
31e31b8a FB |
898 | fprintf(stderr, "VFS: argc is wrong"); |
899 | exit(-1); | |
900 | } | |
edf779ff FB |
901 | tmp1 = tmp; |
902 | while (*tmp++); | |
31e31b8a FB |
903 | len = tmp - tmp1; |
904 | if (p < len) { /* this shouldn't happen - 128kB */ | |
905 | return 0; | |
906 | } | |
907 | while (len) { | |
908 | --p; --tmp; --len; | |
909 | if (--offset < 0) { | |
54936004 | 910 | offset = p % TARGET_PAGE_SIZE; |
53a5960a | 911 | pag = (char *)page[p/TARGET_PAGE_SIZE]; |
44a91cae | 912 | if (!pag) { |
53a5960a | 913 | pag = (char *)malloc(TARGET_PAGE_SIZE); |
4118a970 | 914 | memset(pag, 0, TARGET_PAGE_SIZE); |
53a5960a | 915 | page[p/TARGET_PAGE_SIZE] = pag; |
44a91cae FB |
916 | if (!pag) |
917 | return 0; | |
31e31b8a FB |
918 | } |
919 | } | |
920 | if (len == 0 || offset == 0) { | |
edf779ff | 921 | *(pag + offset) = *tmp; |
31e31b8a FB |
922 | } |
923 | else { | |
924 | int bytes_to_copy = (len > offset) ? offset : len; | |
925 | tmp -= bytes_to_copy; | |
926 | p -= bytes_to_copy; | |
927 | offset -= bytes_to_copy; | |
928 | len -= bytes_to_copy; | |
929 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
930 | } | |
931 | } | |
932 | } | |
933 | return p; | |
934 | } | |
935 | ||
992f48a0 BS |
936 | static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
937 | struct image_info *info) | |
53a5960a | 938 | { |
992f48a0 | 939 | abi_ulong stack_base, size, error; |
31e31b8a | 940 | int i; |
31e31b8a | 941 | |
09bfb054 FB |
942 | /* Create enough stack to hold everything. If we don't use |
943 | * it for args, we'll use it for something else... | |
944 | */ | |
945 | size = x86_stack_size; | |
54936004 FB |
946 | if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) |
947 | size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; | |
5fafdf24 | 948 | error = target_mmap(0, |
83fb7adf | 949 | size + qemu_host_page_size, |
54936004 FB |
950 | PROT_READ | PROT_WRITE, |
951 | MAP_PRIVATE | MAP_ANONYMOUS, | |
952 | -1, 0); | |
09bfb054 FB |
953 | if (error == -1) { |
954 | perror("stk mmap"); | |
955 | exit(-1); | |
956 | } | |
957 | /* we reserve one extra page at the top of the stack as guard */ | |
83fb7adf | 958 | target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
31e31b8a | 959 | |
54936004 | 960 | stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
31e31b8a | 961 | p += stack_base; |
09bfb054 | 962 | |
31e31b8a FB |
963 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
964 | if (bprm->page[i]) { | |
965 | info->rss++; | |
579a97f7 | 966 | /* FIXME - check return value of memcpy_to_target() for failure */ |
53a5960a PB |
967 | memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
968 | free(bprm->page[i]); | |
31e31b8a | 969 | } |
53a5960a | 970 | stack_base += TARGET_PAGE_SIZE; |
31e31b8a FB |
971 | } |
972 | return p; | |
973 | } | |
974 | ||
992f48a0 | 975 | static void set_brk(abi_ulong start, abi_ulong end) |
31e31b8a FB |
976 | { |
977 | /* page-align the start and end addresses... */ | |
54936004 FB |
978 | start = HOST_PAGE_ALIGN(start); |
979 | end = HOST_PAGE_ALIGN(end); | |
31e31b8a FB |
980 | if (end <= start) |
981 | return; | |
54936004 FB |
982 | if(target_mmap(start, end - start, |
983 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
984 | MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { | |
31e31b8a FB |
985 | perror("cannot mmap brk"); |
986 | exit(-1); | |
987 | } | |
988 | } | |
989 | ||
990 | ||
853d6f7a FB |
991 | /* We need to explicitly zero any fractional pages after the data |
992 | section (i.e. bss). This would contain the junk from the file that | |
993 | should not be in memory. */ | |
992f48a0 | 994 | static void padzero(abi_ulong elf_bss, abi_ulong last_bss) |
31e31b8a | 995 | { |
992f48a0 | 996 | abi_ulong nbyte; |
31e31b8a | 997 | |
768a4a36 TS |
998 | if (elf_bss >= last_bss) |
999 | return; | |
1000 | ||
853d6f7a FB |
1001 | /* XXX: this is really a hack : if the real host page size is |
1002 | smaller than the target page size, some pages after the end | |
1003 | of the file may not be mapped. A better fix would be to | |
1004 | patch target_mmap(), but it is more complicated as the file | |
1005 | size must be known */ | |
83fb7adf | 1006 | if (qemu_real_host_page_size < qemu_host_page_size) { |
992f48a0 | 1007 | abi_ulong end_addr, end_addr1; |
5fafdf24 | 1008 | end_addr1 = (elf_bss + qemu_real_host_page_size - 1) & |
83fb7adf | 1009 | ~(qemu_real_host_page_size - 1); |
853d6f7a FB |
1010 | end_addr = HOST_PAGE_ALIGN(elf_bss); |
1011 | if (end_addr1 < end_addr) { | |
863cf0b7 | 1012 | mmap((void *)g2h(end_addr1), end_addr - end_addr1, |
853d6f7a FB |
1013 | PROT_READ|PROT_WRITE|PROT_EXEC, |
1014 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
1015 | } | |
1016 | } | |
1017 | ||
83fb7adf | 1018 | nbyte = elf_bss & (qemu_host_page_size-1); |
31e31b8a | 1019 | if (nbyte) { |
83fb7adf | 1020 | nbyte = qemu_host_page_size - nbyte; |
31e31b8a | 1021 | do { |
2f619698 FB |
1022 | /* FIXME - what to do if put_user() fails? */ |
1023 | put_user_u8(0, elf_bss); | |
53a5960a | 1024 | elf_bss++; |
31e31b8a FB |
1025 | } while (--nbyte); |
1026 | } | |
1027 | } | |
1028 | ||
53a5960a | 1029 | |
992f48a0 BS |
1030 | static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
1031 | struct elfhdr * exec, | |
1032 | abi_ulong load_addr, | |
1033 | abi_ulong load_bias, | |
1034 | abi_ulong interp_load_addr, int ibcs, | |
1035 | struct image_info *info) | |
31e31b8a | 1036 | { |
992f48a0 | 1037 | abi_ulong sp; |
53a5960a | 1038 | int size; |
992f48a0 | 1039 | abi_ulong u_platform; |
15338fd7 | 1040 | const char *k_platform; |
863cf0b7 | 1041 | const int n = sizeof(elf_addr_t); |
edf779ff | 1042 | |
53a5960a PB |
1043 | sp = p; |
1044 | u_platform = 0; | |
15338fd7 FB |
1045 | k_platform = ELF_PLATFORM; |
1046 | if (k_platform) { | |
1047 | size_t len = strlen(k_platform) + 1; | |
53a5960a PB |
1048 | sp -= (len + n - 1) & ~(n - 1); |
1049 | u_platform = sp; | |
579a97f7 | 1050 | /* FIXME - check return value of memcpy_to_target() for failure */ |
53a5960a | 1051 | memcpy_to_target(sp, k_platform, len); |
15338fd7 | 1052 | } |
53a5960a PB |
1053 | /* |
1054 | * Force 16 byte _final_ alignment here for generality. | |
1055 | */ | |
992f48a0 | 1056 | sp = sp &~ (abi_ulong)15; |
53a5960a | 1057 | size = (DLINFO_ITEMS + 1) * 2; |
15338fd7 | 1058 | if (k_platform) |
53a5960a | 1059 | size += 2; |
f5155289 | 1060 | #ifdef DLINFO_ARCH_ITEMS |
53a5960a | 1061 | size += DLINFO_ARCH_ITEMS * 2; |
f5155289 | 1062 | #endif |
53a5960a PB |
1063 | size += envc + argc + 2; |
1064 | size += (!ibcs ? 3 : 1); /* argc itself */ | |
1065 | size *= n; | |
1066 | if (size & 15) | |
1067 | sp -= 16 - (size & 15); | |
3b46e624 | 1068 | |
863cf0b7 JM |
1069 | /* This is correct because Linux defines |
1070 | * elf_addr_t as Elf32_Off / Elf64_Off | |
1071 | */ | |
2f619698 FB |
1072 | #define NEW_AUX_ENT(id, val) do { \ |
1073 | sp -= n; put_user_ual(val, sp); \ | |
1074 | sp -= n; put_user_ual(id, sp); \ | |
53a5960a | 1075 | } while(0) |
2f619698 | 1076 | |
0bccf03d FB |
1077 | NEW_AUX_ENT (AT_NULL, 0); |
1078 | ||
1079 | /* There must be exactly DLINFO_ITEMS entries here. */ | |
992f48a0 BS |
1080 | NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
1081 | NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); | |
1082 | NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); | |
1083 | NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); | |
1084 | NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); | |
1085 | NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); | |
0bccf03d | 1086 | NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
992f48a0 BS |
1087 | NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
1088 | NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); | |
1089 | NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); | |
1090 | NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); | |
1091 | NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); | |
a07c67df | 1092 | NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); |
15338fd7 | 1093 | if (k_platform) |
53a5960a | 1094 | NEW_AUX_ENT(AT_PLATFORM, u_platform); |
f5155289 | 1095 | #ifdef ARCH_DLINFO |
5fafdf24 | 1096 | /* |
f5155289 FB |
1097 | * ARCH_DLINFO must come last so platform specific code can enforce |
1098 | * special alignment requirements on the AUXV if necessary (eg. PPC). | |
1099 | */ | |
1100 | ARCH_DLINFO; | |
1101 | #endif | |
1102 | #undef NEW_AUX_ENT | |
1103 | ||
edf8e2af MW |
1104 | info->saved_auxv = sp; |
1105 | ||
e5fe0c52 | 1106 | sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
31e31b8a FB |
1107 | return sp; |
1108 | } | |
1109 | ||
1110 | ||
992f48a0 BS |
1111 | static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
1112 | int interpreter_fd, | |
1113 | abi_ulong *interp_load_addr) | |
31e31b8a FB |
1114 | { |
1115 | struct elf_phdr *elf_phdata = NULL; | |
1116 | struct elf_phdr *eppnt; | |
992f48a0 | 1117 | abi_ulong load_addr = 0; |
31e31b8a FB |
1118 | int load_addr_set = 0; |
1119 | int retval; | |
992f48a0 BS |
1120 | abi_ulong last_bss, elf_bss; |
1121 | abi_ulong error; | |
31e31b8a | 1122 | int i; |
5fafdf24 | 1123 | |
31e31b8a FB |
1124 | elf_bss = 0; |
1125 | last_bss = 0; | |
1126 | error = 0; | |
1127 | ||
644c433c FB |
1128 | #ifdef BSWAP_NEEDED |
1129 | bswap_ehdr(interp_elf_ex); | |
1130 | #endif | |
31e31b8a | 1131 | /* First of all, some simple consistency checks */ |
5fafdf24 TS |
1132 | if ((interp_elf_ex->e_type != ET_EXEC && |
1133 | interp_elf_ex->e_type != ET_DYN) || | |
31e31b8a | 1134 | !elf_check_arch(interp_elf_ex->e_machine)) { |
992f48a0 | 1135 | return ~((abi_ulong)0UL); |
31e31b8a | 1136 | } |
5fafdf24 | 1137 | |
644c433c | 1138 | |
31e31b8a | 1139 | /* Now read in all of the header information */ |
5fafdf24 | 1140 | |
54936004 | 1141 | if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
992f48a0 | 1142 | return ~(abi_ulong)0UL; |
5fafdf24 TS |
1143 | |
1144 | elf_phdata = (struct elf_phdr *) | |
31e31b8a FB |
1145 | malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
1146 | ||
1147 | if (!elf_phdata) | |
992f48a0 | 1148 | return ~((abi_ulong)0UL); |
5fafdf24 | 1149 | |
31e31b8a FB |
1150 | /* |
1151 | * If the size of this structure has changed, then punt, since | |
1152 | * we will be doing the wrong thing. | |
1153 | */ | |
09bfb054 | 1154 | if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
31e31b8a | 1155 | free(elf_phdata); |
992f48a0 | 1156 | return ~((abi_ulong)0UL); |
09bfb054 | 1157 | } |
31e31b8a FB |
1158 | |
1159 | retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); | |
1160 | if(retval >= 0) { | |
1161 | retval = read(interpreter_fd, | |
1162 | (char *) elf_phdata, | |
1163 | sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); | |
1164 | } | |
31e31b8a FB |
1165 | if (retval < 0) { |
1166 | perror("load_elf_interp"); | |
1167 | exit(-1); | |
1168 | free (elf_phdata); | |
1169 | return retval; | |
1170 | } | |
1171 | #ifdef BSWAP_NEEDED | |
1172 | eppnt = elf_phdata; | |
1173 | for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { | |
1174 | bswap_phdr(eppnt); | |
1175 | } | |
1176 | #endif | |
09bfb054 FB |
1177 | |
1178 | if (interp_elf_ex->e_type == ET_DYN) { | |
e91c8a77 | 1179 | /* in order to avoid hardcoding the interpreter load |
09bfb054 | 1180 | address in qemu, we allocate a big enough memory zone */ |
54936004 | 1181 | error = target_mmap(0, INTERP_MAP_SIZE, |
5fafdf24 | 1182 | PROT_NONE, MAP_PRIVATE | MAP_ANON, |
54936004 | 1183 | -1, 0); |
09bfb054 FB |
1184 | if (error == -1) { |
1185 | perror("mmap"); | |
1186 | exit(-1); | |
1187 | } | |
1188 | load_addr = error; | |
1189 | load_addr_set = 1; | |
1190 | } | |
1191 | ||
31e31b8a FB |
1192 | eppnt = elf_phdata; |
1193 | for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) | |
1194 | if (eppnt->p_type == PT_LOAD) { | |
1195 | int elf_type = MAP_PRIVATE | MAP_DENYWRITE; | |
1196 | int elf_prot = 0; | |
992f48a0 BS |
1197 | abi_ulong vaddr = 0; |
1198 | abi_ulong k; | |
31e31b8a FB |
1199 | |
1200 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
1201 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1202 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1203 | if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) { | |
1204 | elf_type |= MAP_FIXED; | |
1205 | vaddr = eppnt->p_vaddr; | |
1206 | } | |
54936004 FB |
1207 | error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
1208 | eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), | |
31e31b8a FB |
1209 | elf_prot, |
1210 | elf_type, | |
1211 | interpreter_fd, | |
54936004 | 1212 | eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
3b46e624 | 1213 | |
e89f07d3 | 1214 | if (error == -1) { |
31e31b8a FB |
1215 | /* Real error */ |
1216 | close(interpreter_fd); | |
1217 | free(elf_phdata); | |
992f48a0 | 1218 | return ~((abi_ulong)0UL); |
31e31b8a FB |
1219 | } |
1220 | ||
1221 | if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) { | |
1222 | load_addr = error; | |
1223 | load_addr_set = 1; | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * Find the end of the file mapping for this phdr, and keep | |
1228 | * track of the largest address we see for this. | |
1229 | */ | |
1230 | k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; | |
1231 | if (k > elf_bss) elf_bss = k; | |
1232 | ||
1233 | /* | |
1234 | * Do the same thing for the memory mapping - between | |
1235 | * elf_bss and last_bss is the bss section. | |
1236 | */ | |
1237 | k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; | |
1238 | if (k > last_bss) last_bss = k; | |
1239 | } | |
5fafdf24 | 1240 | |
31e31b8a FB |
1241 | /* Now use mmap to map the library into memory. */ |
1242 | ||
1243 | close(interpreter_fd); | |
1244 | ||
1245 | /* | |
1246 | * Now fill out the bss section. First pad the last page up | |
1247 | * to the page boundary, and then perform a mmap to make sure | |
1248 | * that there are zeromapped pages up to and including the last | |
1249 | * bss page. | |
1250 | */ | |
768a4a36 | 1251 | padzero(elf_bss, last_bss); |
83fb7adf | 1252 | elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
31e31b8a FB |
1253 | |
1254 | /* Map the last of the bss segment */ | |
1255 | if (last_bss > elf_bss) { | |
54936004 FB |
1256 | target_mmap(elf_bss, last_bss-elf_bss, |
1257 | PROT_READ|PROT_WRITE|PROT_EXEC, | |
1258 | MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
31e31b8a FB |
1259 | } |
1260 | free(elf_phdata); | |
1261 | ||
1262 | *interp_load_addr = load_addr; | |
992f48a0 | 1263 | return ((abi_ulong) interp_elf_ex->e_entry) + load_addr; |
31e31b8a FB |
1264 | } |
1265 | ||
49918a75 PB |
1266 | static int symfind(const void *s0, const void *s1) |
1267 | { | |
1268 | struct elf_sym *key = (struct elf_sym *)s0; | |
1269 | struct elf_sym *sym = (struct elf_sym *)s1; | |
1270 | int result = 0; | |
1271 | if (key->st_value < sym->st_value) { | |
1272 | result = -1; | |
ec822001 | 1273 | } else if (key->st_value >= sym->st_value + sym->st_size) { |
49918a75 PB |
1274 | result = 1; |
1275 | } | |
1276 | return result; | |
1277 | } | |
1278 | ||
1279 | static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) | |
1280 | { | |
1281 | #if ELF_CLASS == ELFCLASS32 | |
1282 | struct elf_sym *syms = s->disas_symtab.elf32; | |
1283 | #else | |
1284 | struct elf_sym *syms = s->disas_symtab.elf64; | |
1285 | #endif | |
1286 | ||
1287 | // binary search | |
1288 | struct elf_sym key; | |
1289 | struct elf_sym *sym; | |
1290 | ||
1291 | key.st_value = orig_addr; | |
1292 | ||
1293 | sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind); | |
7cba04f6 | 1294 | if (sym != NULL) { |
49918a75 PB |
1295 | return s->disas_strtab + sym->st_name; |
1296 | } | |
1297 | ||
1298 | return ""; | |
1299 | } | |
1300 | ||
1301 | /* FIXME: This should use elf_ops.h */ | |
1302 | static int symcmp(const void *s0, const void *s1) | |
1303 | { | |
1304 | struct elf_sym *sym0 = (struct elf_sym *)s0; | |
1305 | struct elf_sym *sym1 = (struct elf_sym *)s1; | |
1306 | return (sym0->st_value < sym1->st_value) | |
1307 | ? -1 | |
1308 | : ((sym0->st_value > sym1->st_value) ? 1 : 0); | |
1309 | } | |
1310 | ||
689f936f FB |
1311 | /* Best attempt to load symbols from this ELF object. */ |
1312 | static void load_symbols(struct elfhdr *hdr, int fd) | |
1313 | { | |
49918a75 | 1314 | unsigned int i, nsyms; |
689f936f FB |
1315 | struct elf_shdr sechdr, symtab, strtab; |
1316 | char *strings; | |
e80cfcfc | 1317 | struct syminfo *s; |
49918a75 | 1318 | struct elf_sym *syms; |
689f936f FB |
1319 | |
1320 | lseek(fd, hdr->e_shoff, SEEK_SET); | |
1321 | for (i = 0; i < hdr->e_shnum; i++) { | |
49918a75 PB |
1322 | if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) |
1323 | return; | |
689f936f | 1324 | #ifdef BSWAP_NEEDED |
49918a75 | 1325 | bswap_shdr(&sechdr); |
689f936f | 1326 | #endif |
49918a75 PB |
1327 | if (sechdr.sh_type == SHT_SYMTAB) { |
1328 | symtab = sechdr; | |
1329 | lseek(fd, hdr->e_shoff | |
1330 | + sizeof(sechdr) * sechdr.sh_link, SEEK_SET); | |
1331 | if (read(fd, &strtab, sizeof(strtab)) | |
1332 | != sizeof(strtab)) | |
1333 | return; | |
689f936f | 1334 | #ifdef BSWAP_NEEDED |
49918a75 | 1335 | bswap_shdr(&strtab); |
689f936f | 1336 | #endif |
49918a75 PB |
1337 | goto found; |
1338 | } | |
689f936f FB |
1339 | } |
1340 | return; /* Shouldn't happen... */ | |
1341 | ||
1342 | found: | |
1343 | /* Now know where the strtab and symtab are. Snarf them. */ | |
e80cfcfc | 1344 | s = malloc(sizeof(*s)); |
49918a75 PB |
1345 | syms = malloc(symtab.sh_size); |
1346 | if (!syms) | |
1347 | return; | |
e80cfcfc | 1348 | s->disas_strtab = strings = malloc(strtab.sh_size); |
49918a75 PB |
1349 | if (!s->disas_strtab) |
1350 | return; | |
5fafdf24 | 1351 | |
689f936f | 1352 | lseek(fd, symtab.sh_offset, SEEK_SET); |
49918a75 PB |
1353 | if (read(fd, syms, symtab.sh_size) != symtab.sh_size) |
1354 | return; | |
1355 | ||
1356 | nsyms = symtab.sh_size / sizeof(struct elf_sym); | |
31e31b8a | 1357 | |
49918a75 PB |
1358 | i = 0; |
1359 | while (i < nsyms) { | |
689f936f | 1360 | #ifdef BSWAP_NEEDED |
49918a75 | 1361 | bswap_sym(syms + i); |
689f936f | 1362 | #endif |
49918a75 PB |
1363 | // Throw away entries which we do not need. |
1364 | if (syms[i].st_shndx == SHN_UNDEF || | |
1365 | syms[i].st_shndx >= SHN_LORESERVE || | |
1366 | ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { | |
1367 | nsyms--; | |
1368 | if (i < nsyms) { | |
1369 | syms[i] = syms[nsyms]; | |
1370 | } | |
1371 | continue; | |
1372 | } | |
1373 | #if defined(TARGET_ARM) || defined (TARGET_MIPS) | |
1374 | /* The bottom address bit marks a Thumb or MIPS16 symbol. */ | |
1375 | syms[i].st_value &= ~(target_ulong)1; | |
0774bed1 | 1376 | #endif |
49918a75 | 1377 | i++; |
0774bed1 | 1378 | } |
49918a75 PB |
1379 | syms = realloc(syms, nsyms * sizeof(*syms)); |
1380 | ||
1381 | qsort(syms, nsyms, sizeof(*syms), symcmp); | |
689f936f FB |
1382 | |
1383 | lseek(fd, strtab.sh_offset, SEEK_SET); | |
1384 | if (read(fd, strings, strtab.sh_size) != strtab.sh_size) | |
49918a75 PB |
1385 | return; |
1386 | s->disas_num_syms = nsyms; | |
1387 | #if ELF_CLASS == ELFCLASS32 | |
1388 | s->disas_symtab.elf32 = syms; | |
ca20cf32 | 1389 | s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
49918a75 PB |
1390 | #else |
1391 | s->disas_symtab.elf64 = syms; | |
ca20cf32 | 1392 | s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
49918a75 | 1393 | #endif |
e80cfcfc FB |
1394 | s->next = syminfos; |
1395 | syminfos = s; | |
689f936f | 1396 | } |
31e31b8a | 1397 | |
e5fe0c52 PB |
1398 | int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1399 | struct image_info * info) | |
31e31b8a FB |
1400 | { |
1401 | struct elfhdr elf_ex; | |
1402 | struct elfhdr interp_elf_ex; | |
1403 | struct exec interp_ex; | |
1404 | int interpreter_fd = -1; /* avoid warning */ | |
992f48a0 | 1405 | abi_ulong load_addr, load_bias; |
31e31b8a FB |
1406 | int load_addr_set = 0; |
1407 | unsigned int interpreter_type = INTERPRETER_NONE; | |
1408 | unsigned char ibcs2_interpreter; | |
1409 | int i; | |
992f48a0 | 1410 | abi_ulong mapped_addr; |
31e31b8a FB |
1411 | struct elf_phdr * elf_ppnt; |
1412 | struct elf_phdr *elf_phdata; | |
992f48a0 | 1413 | abi_ulong elf_bss, k, elf_brk; |
31e31b8a FB |
1414 | int retval; |
1415 | char * elf_interpreter; | |
992f48a0 | 1416 | abi_ulong elf_entry, interp_load_addr = 0; |
31e31b8a | 1417 | int status; |
992f48a0 BS |
1418 | abi_ulong start_code, end_code, start_data, end_data; |
1419 | abi_ulong reloc_func_desc = 0; | |
1420 | abi_ulong elf_stack; | |
31e31b8a FB |
1421 | char passed_fileno[6]; |
1422 | ||
1423 | ibcs2_interpreter = 0; | |
1424 | status = 0; | |
1425 | load_addr = 0; | |
09bfb054 | 1426 | load_bias = 0; |
31e31b8a FB |
1427 | elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
1428 | #ifdef BSWAP_NEEDED | |
1429 | bswap_ehdr(&elf_ex); | |
1430 | #endif | |
1431 | ||
31e31b8a FB |
1432 | /* First of all, some simple consistency checks */ |
1433 | if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) || | |
1434 | (! elf_check_arch(elf_ex.e_machine))) { | |
1435 | return -ENOEXEC; | |
1436 | } | |
1437 | ||
e5fe0c52 PB |
1438 | bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p); |
1439 | bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); | |
1440 | bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); | |
1441 | if (!bprm->p) { | |
1442 | retval = -E2BIG; | |
1443 | } | |
1444 | ||
31e31b8a | 1445 | /* Now read in all of the header information */ |
31e31b8a FB |
1446 | elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum); |
1447 | if (elf_phdata == NULL) { | |
1448 | return -ENOMEM; | |
1449 | } | |
1450 | ||
1451 | retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); | |
1452 | if(retval > 0) { | |
5fafdf24 | 1453 | retval = read(bprm->fd, (char *) elf_phdata, |
31e31b8a FB |
1454 | elf_ex.e_phentsize * elf_ex.e_phnum); |
1455 | } | |
1456 | ||
1457 | if (retval < 0) { | |
1458 | perror("load_elf_binary"); | |
1459 | exit(-1); | |
1460 | free (elf_phdata); | |
1461 | return -errno; | |
1462 | } | |
1463 | ||
b17780d5 FB |
1464 | #ifdef BSWAP_NEEDED |
1465 | elf_ppnt = elf_phdata; | |
1466 | for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { | |
1467 | bswap_phdr(elf_ppnt); | |
1468 | } | |
1469 | #endif | |
31e31b8a FB |
1470 | elf_ppnt = elf_phdata; |
1471 | ||
1472 | elf_bss = 0; | |
1473 | elf_brk = 0; | |
1474 | ||
1475 | ||
992f48a0 | 1476 | elf_stack = ~((abi_ulong)0UL); |
31e31b8a | 1477 | elf_interpreter = NULL; |
992f48a0 | 1478 | start_code = ~((abi_ulong)0UL); |
31e31b8a | 1479 | end_code = 0; |
863cf0b7 | 1480 | start_data = 0; |
31e31b8a | 1481 | end_data = 0; |
98448f58 | 1482 | interp_ex.a_info = 0; |
31e31b8a FB |
1483 | |
1484 | for(i=0;i < elf_ex.e_phnum; i++) { | |
1485 | if (elf_ppnt->p_type == PT_INTERP) { | |
1486 | if ( elf_interpreter != NULL ) | |
1487 | { | |
1488 | free (elf_phdata); | |
1489 | free(elf_interpreter); | |
1490 | close(bprm->fd); | |
1491 | return -EINVAL; | |
1492 | } | |
1493 | ||
1494 | /* This is the program interpreter used for | |
1495 | * shared libraries - for now assume that this | |
1496 | * is an a.out format binary | |
1497 | */ | |
1498 | ||
32ce6337 | 1499 | elf_interpreter = (char *)malloc(elf_ppnt->p_filesz); |
31e31b8a FB |
1500 | |
1501 | if (elf_interpreter == NULL) { | |
1502 | free (elf_phdata); | |
1503 | close(bprm->fd); | |
1504 | return -ENOMEM; | |
1505 | } | |
1506 | ||
31e31b8a FB |
1507 | retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
1508 | if(retval >= 0) { | |
32ce6337 | 1509 | retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
31e31b8a FB |
1510 | } |
1511 | if(retval < 0) { | |
1512 | perror("load_elf_binary2"); | |
1513 | exit(-1); | |
5fafdf24 | 1514 | } |
31e31b8a FB |
1515 | |
1516 | /* If the program interpreter is one of these two, | |
1517 | then assume an iBCS2 image. Otherwise assume | |
1518 | a native linux image. */ | |
1519 | ||
1520 | /* JRP - Need to add X86 lib dir stuff here... */ | |
1521 | ||
1522 | if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || | |
1523 | strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { | |
1524 | ibcs2_interpreter = 1; | |
1525 | } | |
1526 | ||
1527 | #if 0 | |
3bc0bdca | 1528 | printf("Using ELF interpreter %s\n", path(elf_interpreter)); |
31e31b8a FB |
1529 | #endif |
1530 | if (retval >= 0) { | |
32ce6337 | 1531 | retval = open(path(elf_interpreter), O_RDONLY); |
31e31b8a FB |
1532 | if(retval >= 0) { |
1533 | interpreter_fd = retval; | |
1534 | } | |
1535 | else { | |
1536 | perror(elf_interpreter); | |
1537 | exit(-1); | |
1538 | /* retval = -errno; */ | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | if (retval >= 0) { | |
1543 | retval = lseek(interpreter_fd, 0, SEEK_SET); | |
1544 | if(retval >= 0) { | |
1545 | retval = read(interpreter_fd,bprm->buf,128); | |
1546 | } | |
1547 | } | |
1548 | if (retval >= 0) { | |
1549 | interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ | |
6ece4df6 | 1550 | interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
31e31b8a FB |
1551 | } |
1552 | if (retval < 0) { | |
1553 | perror("load_elf_binary3"); | |
1554 | exit(-1); | |
1555 | free (elf_phdata); | |
1556 | free(elf_interpreter); | |
1557 | close(bprm->fd); | |
1558 | return retval; | |
1559 | } | |
1560 | } | |
1561 | elf_ppnt++; | |
1562 | } | |
1563 | ||
1564 | /* Some simple consistency checks for the interpreter */ | |
1565 | if (elf_interpreter){ | |
1566 | interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; | |
1567 | ||
1568 | /* Now figure out which format our binary is */ | |
1569 | if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) && | |
1570 | (N_MAGIC(interp_ex) != QMAGIC)) { | |
1571 | interpreter_type = INTERPRETER_ELF; | |
1572 | } | |
1573 | ||
1574 | if (interp_elf_ex.e_ident[0] != 0x7f || | |
b55266b5 | 1575 | strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) { |
31e31b8a FB |
1576 | interpreter_type &= ~INTERPRETER_ELF; |
1577 | } | |
1578 | ||
1579 | if (!interpreter_type) { | |
1580 | free(elf_interpreter); | |
1581 | free(elf_phdata); | |
1582 | close(bprm->fd); | |
1583 | return -ELIBBAD; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | /* OK, we are done with that, now set up the arg stuff, | |
1588 | and then start this sucker up */ | |
1589 | ||
e5fe0c52 | 1590 | { |
31e31b8a FB |
1591 | char * passed_p; |
1592 | ||
1593 | if (interpreter_type == INTERPRETER_AOUT) { | |
eba2af63 | 1594 | snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
31e31b8a FB |
1595 | passed_p = passed_fileno; |
1596 | ||
1597 | if (elf_interpreter) { | |
e5fe0c52 | 1598 | bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p); |
31e31b8a FB |
1599 | bprm->argc++; |
1600 | } | |
1601 | } | |
1602 | if (!bprm->p) { | |
1603 | if (elf_interpreter) { | |
1604 | free(elf_interpreter); | |
1605 | } | |
1606 | free (elf_phdata); | |
1607 | close(bprm->fd); | |
1608 | return -E2BIG; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | /* OK, This is the point of no return */ | |
1613 | info->end_data = 0; | |
1614 | info->end_code = 0; | |
992f48a0 | 1615 | info->start_mmap = (abi_ulong)ELF_START_MMAP; |
31e31b8a | 1616 | info->mmap = 0; |
992f48a0 | 1617 | elf_entry = (abi_ulong) elf_ex.e_entry; |
31e31b8a | 1618 | |
379f6698 PB |
1619 | #if defined(CONFIG_USE_GUEST_BASE) |
1620 | /* | |
1621 | * In case where user has not explicitly set the guest_base, we | |
1622 | * probe here that should we set it automatically. | |
1623 | */ | |
1624 | if (!have_guest_base) { | |
1625 | /* | |
1626 | * Go through ELF program header table and find out whether | |
1627 | * any of the segments drop below our current mmap_min_addr and | |
1628 | * in that case set guest_base to corresponding address. | |
1629 | */ | |
1630 | for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; | |
1631 | i++, elf_ppnt++) { | |
1632 | if (elf_ppnt->p_type != PT_LOAD) | |
1633 | continue; | |
1634 | if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) { | |
1635 | guest_base = HOST_PAGE_ALIGN(mmap_min_addr); | |
1636 | break; | |
1637 | } | |
1638 | } | |
1639 | } | |
1640 | #endif /* CONFIG_USE_GUEST_BASE */ | |
1641 | ||
31e31b8a FB |
1642 | /* Do this so that we can load the interpreter, if need be. We will |
1643 | change some of these later */ | |
1644 | info->rss = 0; | |
1645 | bprm->p = setup_arg_pages(bprm->p, bprm, info); | |
1646 | info->start_stack = bprm->p; | |
1647 | ||
1648 | /* Now we do a little grungy work by mmaping the ELF image into | |
1649 | * the correct location in memory. At this point, we assume that | |
1650 | * the image should be loaded at fixed address, not at a variable | |
1651 | * address. | |
1652 | */ | |
1653 | ||
31e31b8a | 1654 | for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
09bfb054 FB |
1655 | int elf_prot = 0; |
1656 | int elf_flags = 0; | |
992f48a0 | 1657 | abi_ulong error; |
3b46e624 | 1658 | |
09bfb054 FB |
1659 | if (elf_ppnt->p_type != PT_LOAD) |
1660 | continue; | |
3b46e624 | 1661 | |
09bfb054 FB |
1662 | if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ; |
1663 | if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1664 | if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
1665 | elf_flags = MAP_PRIVATE | MAP_DENYWRITE; | |
1666 | if (elf_ex.e_type == ET_EXEC || load_addr_set) { | |
1667 | elf_flags |= MAP_FIXED; | |
1668 | } else if (elf_ex.e_type == ET_DYN) { | |
1669 | /* Try and get dynamic programs out of the way of the default mmap | |
1670 | base, as well as whatever program they might try to exec. This | |
1671 | is because the brk will follow the loader, and is not movable. */ | |
1672 | /* NOTE: for qemu, we do a big mmap to get enough space | |
e91c8a77 | 1673 | without hardcoding any address */ |
54936004 | 1674 | error = target_mmap(0, ET_DYN_MAP_SIZE, |
5fafdf24 | 1675 | PROT_NONE, MAP_PRIVATE | MAP_ANON, |
54936004 | 1676 | -1, 0); |
09bfb054 FB |
1677 | if (error == -1) { |
1678 | perror("mmap"); | |
1679 | exit(-1); | |
1680 | } | |
54936004 | 1681 | load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
09bfb054 | 1682 | } |
3b46e624 | 1683 | |
54936004 FB |
1684 | error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1685 | (elf_ppnt->p_filesz + | |
1686 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), | |
1687 | elf_prot, | |
1688 | (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), | |
1689 | bprm->fd, | |
5fafdf24 | 1690 | (elf_ppnt->p_offset - |
54936004 | 1691 | TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
09bfb054 FB |
1692 | if (error == -1) { |
1693 | perror("mmap"); | |
1694 | exit(-1); | |
1695 | } | |
31e31b8a FB |
1696 | |
1697 | #ifdef LOW_ELF_STACK | |
54936004 FB |
1698 | if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack) |
1699 | elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); | |
31e31b8a | 1700 | #endif |
3b46e624 | 1701 | |
09bfb054 FB |
1702 | if (!load_addr_set) { |
1703 | load_addr_set = 1; | |
1704 | load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; | |
1705 | if (elf_ex.e_type == ET_DYN) { | |
1706 | load_bias += error - | |
54936004 | 1707 | TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
09bfb054 | 1708 | load_addr += load_bias; |
84409ddb | 1709 | reloc_func_desc = load_bias; |
09bfb054 FB |
1710 | } |
1711 | } | |
1712 | k = elf_ppnt->p_vaddr; | |
5fafdf24 | 1713 | if (k < start_code) |
09bfb054 | 1714 | start_code = k; |
863cf0b7 JM |
1715 | if (start_data < k) |
1716 | start_data = k; | |
09bfb054 | 1717 | k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
5fafdf24 | 1718 | if (k > elf_bss) |
09bfb054 FB |
1719 | elf_bss = k; |
1720 | if ((elf_ppnt->p_flags & PF_X) && end_code < k) | |
1721 | end_code = k; | |
5fafdf24 | 1722 | if (end_data < k) |
09bfb054 FB |
1723 | end_data = k; |
1724 | k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; | |
1725 | if (k > elf_brk) elf_brk = k; | |
31e31b8a FB |
1726 | } |
1727 | ||
09bfb054 FB |
1728 | elf_entry += load_bias; |
1729 | elf_bss += load_bias; | |
1730 | elf_brk += load_bias; | |
1731 | start_code += load_bias; | |
1732 | end_code += load_bias; | |
863cf0b7 | 1733 | start_data += load_bias; |
09bfb054 FB |
1734 | end_data += load_bias; |
1735 | ||
31e31b8a FB |
1736 | if (elf_interpreter) { |
1737 | if (interpreter_type & 1) { | |
1738 | elf_entry = load_aout_interp(&interp_ex, interpreter_fd); | |
1739 | } | |
1740 | else if (interpreter_type & 2) { | |
1741 | elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, | |
1742 | &interp_load_addr); | |
1743 | } | |
84409ddb | 1744 | reloc_func_desc = interp_load_addr; |
31e31b8a FB |
1745 | |
1746 | close(interpreter_fd); | |
1747 | free(elf_interpreter); | |
1748 | ||
992f48a0 | 1749 | if (elf_entry == ~((abi_ulong)0UL)) { |
31e31b8a FB |
1750 | printf("Unable to load interpreter\n"); |
1751 | free(elf_phdata); | |
1752 | exit(-1); | |
1753 | return 0; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | free(elf_phdata); | |
1758 | ||
93fcfe39 | 1759 | if (qemu_log_enabled()) |
689f936f FB |
1760 | load_symbols(&elf_ex, bprm->fd); |
1761 | ||
31e31b8a FB |
1762 | if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd); |
1763 | info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); | |
1764 | ||
1765 | #ifdef LOW_ELF_STACK | |
1766 | info->start_stack = bprm->p = elf_stack - 4; | |
1767 | #endif | |
53a5960a | 1768 | bprm->p = create_elf_tables(bprm->p, |
31e31b8a FB |
1769 | bprm->argc, |
1770 | bprm->envc, | |
a1516e92 | 1771 | &elf_ex, |
09bfb054 | 1772 | load_addr, load_bias, |
31e31b8a FB |
1773 | interp_load_addr, |
1774 | (interpreter_type == INTERPRETER_AOUT ? 0 : 1), | |
1775 | info); | |
92a343da | 1776 | info->load_addr = reloc_func_desc; |
31e31b8a FB |
1777 | info->start_brk = info->brk = elf_brk; |
1778 | info->end_code = end_code; | |
1779 | info->start_code = start_code; | |
863cf0b7 | 1780 | info->start_data = start_data; |
31e31b8a FB |
1781 | info->end_data = end_data; |
1782 | info->start_stack = bprm->p; | |
1783 | ||
1784 | /* Calling set_brk effectively mmaps the pages that we need for the bss and break | |
1785 | sections */ | |
1786 | set_brk(elf_bss, elf_brk); | |
1787 | ||
768a4a36 | 1788 | padzero(elf_bss, elf_brk); |
31e31b8a FB |
1789 | |
1790 | #if 0 | |
1791 | printf("(start_brk) %x\n" , info->start_brk); | |
1792 | printf("(end_code) %x\n" , info->end_code); | |
1793 | printf("(start_code) %x\n" , info->start_code); | |
1794 | printf("(end_data) %x\n" , info->end_data); | |
1795 | printf("(start_stack) %x\n" , info->start_stack); | |
1796 | printf("(brk) %x\n" , info->brk); | |
1797 | #endif | |
1798 | ||
1799 | if ( info->personality == PER_SVR4 ) | |
1800 | { | |
1801 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, | |
1802 | and some applications "depend" upon this behavior. | |
1803 | Since we do not have the power to recompile these, we | |
1804 | emulate the SVr4 behavior. Sigh. */ | |
83fb7adf | 1805 | mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, |
54936004 | 1806 | MAP_FIXED | MAP_PRIVATE, -1, 0); |
31e31b8a FB |
1807 | } |
1808 | ||
31e31b8a FB |
1809 | info->entry = elf_entry; |
1810 | ||
edf8e2af MW |
1811 | #ifdef USE_ELF_CORE_DUMP |
1812 | bprm->core_dump = &elf_core_dump; | |
1813 | #endif | |
1814 | ||
31e31b8a FB |
1815 | return 0; |
1816 | } | |
1817 | ||
edf8e2af MW |
1818 | #ifdef USE_ELF_CORE_DUMP |
1819 | ||
1820 | /* | |
1821 | * Definitions to generate Intel SVR4-like core files. | |
a2547a13 | 1822 | * These mostly have the same names as the SVR4 types with "target_elf_" |
edf8e2af MW |
1823 | * tacked on the front to prevent clashes with linux definitions, |
1824 | * and the typedef forms have been avoided. This is mostly like | |
1825 | * the SVR4 structure, but more Linuxy, with things that Linux does | |
1826 | * not support and which gdb doesn't really use excluded. | |
1827 | * | |
1828 | * Fields we don't dump (their contents is zero) in linux-user qemu | |
1829 | * are marked with XXX. | |
1830 | * | |
1831 | * Core dump code is copied from linux kernel (fs/binfmt_elf.c). | |
1832 | * | |
1833 | * Porting ELF coredump for target is (quite) simple process. First you | |
dd0a3651 | 1834 | * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for |
edf8e2af MW |
1835 | * the target resides): |
1836 | * | |
1837 | * #define USE_ELF_CORE_DUMP | |
1838 | * | |
1839 | * Next you define type of register set used for dumping. ELF specification | |
1840 | * says that it needs to be array of elf_greg_t that has size of ELF_NREG. | |
1841 | * | |
c227f099 | 1842 | * typedef <target_regtype> target_elf_greg_t; |
edf8e2af | 1843 | * #define ELF_NREG <number of registers> |
c227f099 | 1844 | * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
edf8e2af | 1845 | * |
edf8e2af MW |
1846 | * Last step is to implement target specific function that copies registers |
1847 | * from given cpu into just specified register set. Prototype is: | |
1848 | * | |
c227f099 | 1849 | * static void elf_core_copy_regs(taret_elf_gregset_t *regs, |
a2547a13 | 1850 | * const CPUState *env); |
edf8e2af MW |
1851 | * |
1852 | * Parameters: | |
1853 | * regs - copy register values into here (allocated and zeroed by caller) | |
1854 | * env - copy registers from here | |
1855 | * | |
1856 | * Example for ARM target is provided in this file. | |
1857 | */ | |
1858 | ||
1859 | /* An ELF note in memory */ | |
1860 | struct memelfnote { | |
1861 | const char *name; | |
1862 | size_t namesz; | |
1863 | size_t namesz_rounded; | |
1864 | int type; | |
1865 | size_t datasz; | |
1866 | void *data; | |
1867 | size_t notesz; | |
1868 | }; | |
1869 | ||
a2547a13 | 1870 | struct target_elf_siginfo { |
edf8e2af MW |
1871 | int si_signo; /* signal number */ |
1872 | int si_code; /* extra code */ | |
1873 | int si_errno; /* errno */ | |
1874 | }; | |
1875 | ||
a2547a13 LD |
1876 | struct target_elf_prstatus { |
1877 | struct target_elf_siginfo pr_info; /* Info associated with signal */ | |
edf8e2af MW |
1878 | short pr_cursig; /* Current signal */ |
1879 | target_ulong pr_sigpend; /* XXX */ | |
1880 | target_ulong pr_sighold; /* XXX */ | |
c227f099 AL |
1881 | target_pid_t pr_pid; |
1882 | target_pid_t pr_ppid; | |
1883 | target_pid_t pr_pgrp; | |
1884 | target_pid_t pr_sid; | |
edf8e2af MW |
1885 | struct target_timeval pr_utime; /* XXX User time */ |
1886 | struct target_timeval pr_stime; /* XXX System time */ | |
1887 | struct target_timeval pr_cutime; /* XXX Cumulative user time */ | |
1888 | struct target_timeval pr_cstime; /* XXX Cumulative system time */ | |
c227f099 | 1889 | target_elf_gregset_t pr_reg; /* GP registers */ |
edf8e2af MW |
1890 | int pr_fpvalid; /* XXX */ |
1891 | }; | |
1892 | ||
1893 | #define ELF_PRARGSZ (80) /* Number of chars for args */ | |
1894 | ||
a2547a13 | 1895 | struct target_elf_prpsinfo { |
edf8e2af MW |
1896 | char pr_state; /* numeric process state */ |
1897 | char pr_sname; /* char for pr_state */ | |
1898 | char pr_zomb; /* zombie */ | |
1899 | char pr_nice; /* nice val */ | |
1900 | target_ulong pr_flag; /* flags */ | |
c227f099 AL |
1901 | target_uid_t pr_uid; |
1902 | target_gid_t pr_gid; | |
1903 | target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; | |
edf8e2af MW |
1904 | /* Lots missing */ |
1905 | char pr_fname[16]; /* filename of executable */ | |
1906 | char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ | |
1907 | }; | |
1908 | ||
1909 | /* Here is the structure in which status of each thread is captured. */ | |
1910 | struct elf_thread_status { | |
72cf2d4f | 1911 | QTAILQ_ENTRY(elf_thread_status) ets_link; |
a2547a13 | 1912 | struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ |
edf8e2af MW |
1913 | #if 0 |
1914 | elf_fpregset_t fpu; /* NT_PRFPREG */ | |
1915 | struct task_struct *thread; | |
1916 | elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ | |
1917 | #endif | |
1918 | struct memelfnote notes[1]; | |
1919 | int num_notes; | |
1920 | }; | |
1921 | ||
1922 | struct elf_note_info { | |
1923 | struct memelfnote *notes; | |
a2547a13 LD |
1924 | struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ |
1925 | struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ | |
edf8e2af | 1926 | |
72cf2d4f | 1927 | QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; |
edf8e2af MW |
1928 | #if 0 |
1929 | /* | |
1930 | * Current version of ELF coredump doesn't support | |
1931 | * dumping fp regs etc. | |
1932 | */ | |
1933 | elf_fpregset_t *fpu; | |
1934 | elf_fpxregset_t *xfpu; | |
1935 | int thread_status_size; | |
1936 | #endif | |
1937 | int notes_size; | |
1938 | int numnote; | |
1939 | }; | |
1940 | ||
1941 | struct vm_area_struct { | |
1942 | abi_ulong vma_start; /* start vaddr of memory region */ | |
1943 | abi_ulong vma_end; /* end vaddr of memory region */ | |
1944 | abi_ulong vma_flags; /* protection etc. flags for the region */ | |
72cf2d4f | 1945 | QTAILQ_ENTRY(vm_area_struct) vma_link; |
edf8e2af MW |
1946 | }; |
1947 | ||
1948 | struct mm_struct { | |
72cf2d4f | 1949 | QTAILQ_HEAD(, vm_area_struct) mm_mmap; |
edf8e2af MW |
1950 | int mm_count; /* number of mappings */ |
1951 | }; | |
1952 | ||
1953 | static struct mm_struct *vma_init(void); | |
1954 | static void vma_delete(struct mm_struct *); | |
1955 | static int vma_add_mapping(struct mm_struct *, abi_ulong, | |
1956 | abi_ulong, abi_ulong); | |
1957 | static int vma_get_mapping_count(const struct mm_struct *); | |
1958 | static struct vm_area_struct *vma_first(const struct mm_struct *); | |
1959 | static struct vm_area_struct *vma_next(struct vm_area_struct *); | |
1960 | static abi_ulong vma_dump_size(const struct vm_area_struct *); | |
1961 | static int vma_walker(void *priv, unsigned long start, unsigned long end, | |
1962 | unsigned long flags); | |
1963 | ||
1964 | static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); | |
1965 | static void fill_note(struct memelfnote *, const char *, int, | |
1966 | unsigned int, void *); | |
a2547a13 LD |
1967 | static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); |
1968 | static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); | |
edf8e2af MW |
1969 | static void fill_auxv_note(struct memelfnote *, const TaskState *); |
1970 | static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); | |
1971 | static size_t note_size(const struct memelfnote *); | |
1972 | static void free_note_info(struct elf_note_info *); | |
1973 | static int fill_note_info(struct elf_note_info *, long, const CPUState *); | |
1974 | static void fill_thread_info(struct elf_note_info *, const CPUState *); | |
1975 | static int core_dump_filename(const TaskState *, char *, size_t); | |
1976 | ||
1977 | static int dump_write(int, const void *, size_t); | |
1978 | static int write_note(struct memelfnote *, int); | |
1979 | static int write_note_info(struct elf_note_info *, int); | |
1980 | ||
1981 | #ifdef BSWAP_NEEDED | |
a2547a13 LD |
1982 | static void bswap_prstatus(struct target_elf_prstatus *); |
1983 | static void bswap_psinfo(struct target_elf_prpsinfo *); | |
edf8e2af | 1984 | |
a2547a13 | 1985 | static void bswap_prstatus(struct target_elf_prstatus *prstatus) |
edf8e2af MW |
1986 | { |
1987 | prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo); | |
1988 | prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code); | |
1989 | prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno); | |
1990 | prstatus->pr_cursig = tswap16(prstatus->pr_cursig); | |
1991 | prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend); | |
1992 | prstatus->pr_sighold = tswapl(prstatus->pr_sighold); | |
1993 | prstatus->pr_pid = tswap32(prstatus->pr_pid); | |
1994 | prstatus->pr_ppid = tswap32(prstatus->pr_ppid); | |
1995 | prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); | |
1996 | prstatus->pr_sid = tswap32(prstatus->pr_sid); | |
1997 | /* cpu times are not filled, so we skip them */ | |
1998 | /* regs should be in correct format already */ | |
1999 | prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); | |
2000 | } | |
2001 | ||
a2547a13 | 2002 | static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) |
edf8e2af MW |
2003 | { |
2004 | psinfo->pr_flag = tswapl(psinfo->pr_flag); | |
2005 | psinfo->pr_uid = tswap16(psinfo->pr_uid); | |
2006 | psinfo->pr_gid = tswap16(psinfo->pr_gid); | |
2007 | psinfo->pr_pid = tswap32(psinfo->pr_pid); | |
2008 | psinfo->pr_ppid = tswap32(psinfo->pr_ppid); | |
2009 | psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); | |
2010 | psinfo->pr_sid = tswap32(psinfo->pr_sid); | |
2011 | } | |
2012 | #endif /* BSWAP_NEEDED */ | |
2013 | ||
2014 | /* | |
2015 | * Minimal support for linux memory regions. These are needed | |
2016 | * when we are finding out what memory exactly belongs to | |
2017 | * emulated process. No locks needed here, as long as | |
2018 | * thread that received the signal is stopped. | |
2019 | */ | |
2020 | ||
2021 | static struct mm_struct *vma_init(void) | |
2022 | { | |
2023 | struct mm_struct *mm; | |
2024 | ||
2025 | if ((mm = qemu_malloc(sizeof (*mm))) == NULL) | |
2026 | return (NULL); | |
2027 | ||
2028 | mm->mm_count = 0; | |
72cf2d4f | 2029 | QTAILQ_INIT(&mm->mm_mmap); |
edf8e2af MW |
2030 | |
2031 | return (mm); | |
2032 | } | |
2033 | ||
2034 | static void vma_delete(struct mm_struct *mm) | |
2035 | { | |
2036 | struct vm_area_struct *vma; | |
2037 | ||
2038 | while ((vma = vma_first(mm)) != NULL) { | |
72cf2d4f | 2039 | QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); |
edf8e2af MW |
2040 | qemu_free(vma); |
2041 | } | |
2042 | qemu_free(mm); | |
2043 | } | |
2044 | ||
2045 | static int vma_add_mapping(struct mm_struct *mm, abi_ulong start, | |
2046 | abi_ulong end, abi_ulong flags) | |
2047 | { | |
2048 | struct vm_area_struct *vma; | |
2049 | ||
2050 | if ((vma = qemu_mallocz(sizeof (*vma))) == NULL) | |
2051 | return (-1); | |
2052 | ||
2053 | vma->vma_start = start; | |
2054 | vma->vma_end = end; | |
2055 | vma->vma_flags = flags; | |
2056 | ||
72cf2d4f | 2057 | QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); |
edf8e2af MW |
2058 | mm->mm_count++; |
2059 | ||
2060 | return (0); | |
2061 | } | |
2062 | ||
2063 | static struct vm_area_struct *vma_first(const struct mm_struct *mm) | |
2064 | { | |
72cf2d4f | 2065 | return (QTAILQ_FIRST(&mm->mm_mmap)); |
edf8e2af MW |
2066 | } |
2067 | ||
2068 | static struct vm_area_struct *vma_next(struct vm_area_struct *vma) | |
2069 | { | |
72cf2d4f | 2070 | return (QTAILQ_NEXT(vma, vma_link)); |
edf8e2af MW |
2071 | } |
2072 | ||
2073 | static int vma_get_mapping_count(const struct mm_struct *mm) | |
2074 | { | |
2075 | return (mm->mm_count); | |
2076 | } | |
2077 | ||
2078 | /* | |
2079 | * Calculate file (dump) size of given memory region. | |
2080 | */ | |
2081 | static abi_ulong vma_dump_size(const struct vm_area_struct *vma) | |
2082 | { | |
2083 | /* if we cannot even read the first page, skip it */ | |
2084 | if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE)) | |
2085 | return (0); | |
2086 | ||
2087 | /* | |
2088 | * Usually we don't dump executable pages as they contain | |
2089 | * non-writable code that debugger can read directly from | |
2090 | * target library etc. However, thread stacks are marked | |
2091 | * also executable so we read in first page of given region | |
2092 | * and check whether it contains elf header. If there is | |
2093 | * no elf header, we dump it. | |
2094 | */ | |
2095 | if (vma->vma_flags & PROT_EXEC) { | |
2096 | char page[TARGET_PAGE_SIZE]; | |
2097 | ||
2098 | copy_from_user(page, vma->vma_start, sizeof (page)); | |
2099 | if ((page[EI_MAG0] == ELFMAG0) && | |
2100 | (page[EI_MAG1] == ELFMAG1) && | |
2101 | (page[EI_MAG2] == ELFMAG2) && | |
2102 | (page[EI_MAG3] == ELFMAG3)) { | |
2103 | /* | |
2104 | * Mappings are possibly from ELF binary. Don't dump | |
2105 | * them. | |
2106 | */ | |
2107 | return (0); | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | return (vma->vma_end - vma->vma_start); | |
2112 | } | |
2113 | ||
2114 | static int vma_walker(void *priv, unsigned long start, unsigned long end, | |
2115 | unsigned long flags) | |
2116 | { | |
2117 | struct mm_struct *mm = (struct mm_struct *)priv; | |
2118 | ||
2119 | /* | |
2120 | * Don't dump anything that qemu has reserved for internal use. | |
2121 | */ | |
2122 | if (flags & PAGE_RESERVED) | |
2123 | return (0); | |
2124 | ||
2125 | vma_add_mapping(mm, start, end, flags); | |
2126 | return (0); | |
2127 | } | |
2128 | ||
2129 | static void fill_note(struct memelfnote *note, const char *name, int type, | |
2130 | unsigned int sz, void *data) | |
2131 | { | |
2132 | unsigned int namesz; | |
2133 | ||
2134 | namesz = strlen(name) + 1; | |
2135 | note->name = name; | |
2136 | note->namesz = namesz; | |
2137 | note->namesz_rounded = roundup(namesz, sizeof (int32_t)); | |
2138 | note->type = type; | |
2139 | note->datasz = roundup(sz, sizeof (int32_t));; | |
2140 | note->data = data; | |
2141 | ||
2142 | /* | |
2143 | * We calculate rounded up note size here as specified by | |
2144 | * ELF document. | |
2145 | */ | |
2146 | note->notesz = sizeof (struct elf_note) + | |
2147 | note->namesz_rounded + note->datasz; | |
2148 | } | |
2149 | ||
2150 | static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, | |
2151 | uint32_t flags) | |
2152 | { | |
2153 | (void) memset(elf, 0, sizeof(*elf)); | |
2154 | ||
2155 | (void) memcpy(elf->e_ident, ELFMAG, SELFMAG); | |
2156 | elf->e_ident[EI_CLASS] = ELF_CLASS; | |
2157 | elf->e_ident[EI_DATA] = ELF_DATA; | |
2158 | elf->e_ident[EI_VERSION] = EV_CURRENT; | |
2159 | elf->e_ident[EI_OSABI] = ELF_OSABI; | |
2160 | ||
2161 | elf->e_type = ET_CORE; | |
2162 | elf->e_machine = machine; | |
2163 | elf->e_version = EV_CURRENT; | |
2164 | elf->e_phoff = sizeof(struct elfhdr); | |
2165 | elf->e_flags = flags; | |
2166 | elf->e_ehsize = sizeof(struct elfhdr); | |
2167 | elf->e_phentsize = sizeof(struct elf_phdr); | |
2168 | elf->e_phnum = segs; | |
2169 | ||
2170 | #ifdef BSWAP_NEEDED | |
2171 | bswap_ehdr(elf); | |
2172 | #endif | |
2173 | } | |
2174 | ||
2175 | static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) | |
2176 | { | |
2177 | phdr->p_type = PT_NOTE; | |
2178 | phdr->p_offset = offset; | |
2179 | phdr->p_vaddr = 0; | |
2180 | phdr->p_paddr = 0; | |
2181 | phdr->p_filesz = sz; | |
2182 | phdr->p_memsz = 0; | |
2183 | phdr->p_flags = 0; | |
2184 | phdr->p_align = 0; | |
2185 | ||
2186 | #ifdef BSWAP_NEEDED | |
2187 | bswap_phdr(phdr); | |
2188 | #endif | |
2189 | } | |
2190 | ||
2191 | static size_t note_size(const struct memelfnote *note) | |
2192 | { | |
2193 | return (note->notesz); | |
2194 | } | |
2195 | ||
a2547a13 | 2196 | static void fill_prstatus(struct target_elf_prstatus *prstatus, |
edf8e2af MW |
2197 | const TaskState *ts, int signr) |
2198 | { | |
2199 | (void) memset(prstatus, 0, sizeof (*prstatus)); | |
2200 | prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; | |
2201 | prstatus->pr_pid = ts->ts_tid; | |
2202 | prstatus->pr_ppid = getppid(); | |
2203 | prstatus->pr_pgrp = getpgrp(); | |
2204 | prstatus->pr_sid = getsid(0); | |
2205 | ||
2206 | #ifdef BSWAP_NEEDED | |
2207 | bswap_prstatus(prstatus); | |
2208 | #endif | |
2209 | } | |
2210 | ||
a2547a13 | 2211 | static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) |
edf8e2af MW |
2212 | { |
2213 | char *filename, *base_filename; | |
2214 | unsigned int i, len; | |
2215 | ||
2216 | (void) memset(psinfo, 0, sizeof (*psinfo)); | |
2217 | ||
2218 | len = ts->info->arg_end - ts->info->arg_start; | |
2219 | if (len >= ELF_PRARGSZ) | |
2220 | len = ELF_PRARGSZ - 1; | |
2221 | if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len)) | |
2222 | return -EFAULT; | |
2223 | for (i = 0; i < len; i++) | |
2224 | if (psinfo->pr_psargs[i] == 0) | |
2225 | psinfo->pr_psargs[i] = ' '; | |
2226 | psinfo->pr_psargs[len] = 0; | |
2227 | ||
2228 | psinfo->pr_pid = getpid(); | |
2229 | psinfo->pr_ppid = getppid(); | |
2230 | psinfo->pr_pgrp = getpgrp(); | |
2231 | psinfo->pr_sid = getsid(0); | |
2232 | psinfo->pr_uid = getuid(); | |
2233 | psinfo->pr_gid = getgid(); | |
2234 | ||
2235 | filename = strdup(ts->bprm->filename); | |
2236 | base_filename = strdup(basename(filename)); | |
2237 | (void) strncpy(psinfo->pr_fname, base_filename, | |
2238 | sizeof(psinfo->pr_fname)); | |
2239 | free(base_filename); | |
2240 | free(filename); | |
2241 | ||
2242 | #ifdef BSWAP_NEEDED | |
2243 | bswap_psinfo(psinfo); | |
2244 | #endif | |
2245 | return (0); | |
2246 | } | |
2247 | ||
2248 | static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) | |
2249 | { | |
2250 | elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; | |
2251 | elf_addr_t orig_auxv = auxv; | |
2252 | abi_ulong val; | |
2253 | void *ptr; | |
2254 | int i, len; | |
2255 | ||
2256 | /* | |
2257 | * Auxiliary vector is stored in target process stack. It contains | |
2258 | * {type, value} pairs that we need to dump into note. This is not | |
2259 | * strictly necessary but we do it here for sake of completeness. | |
2260 | */ | |
2261 | ||
2262 | /* find out lenght of the vector, AT_NULL is terminator */ | |
2263 | i = len = 0; | |
2264 | do { | |
2265 | get_user_ual(val, auxv); | |
2266 | i += 2; | |
2267 | auxv += 2 * sizeof (elf_addr_t); | |
2268 | } while (val != AT_NULL); | |
2269 | len = i * sizeof (elf_addr_t); | |
2270 | ||
2271 | /* read in whole auxv vector and copy it to memelfnote */ | |
2272 | ptr = lock_user(VERIFY_READ, orig_auxv, len, 0); | |
2273 | if (ptr != NULL) { | |
2274 | fill_note(note, "CORE", NT_AUXV, len, ptr); | |
2275 | unlock_user(ptr, auxv, len); | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | /* | |
2280 | * Constructs name of coredump file. We have following convention | |
2281 | * for the name: | |
2282 | * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core | |
2283 | * | |
2284 | * Returns 0 in case of success, -1 otherwise (errno is set). | |
2285 | */ | |
2286 | static int core_dump_filename(const TaskState *ts, char *buf, | |
2287 | size_t bufsize) | |
2288 | { | |
2289 | char timestamp[64]; | |
2290 | char *filename = NULL; | |
2291 | char *base_filename = NULL; | |
2292 | struct timeval tv; | |
2293 | struct tm tm; | |
2294 | ||
2295 | assert(bufsize >= PATH_MAX); | |
2296 | ||
2297 | if (gettimeofday(&tv, NULL) < 0) { | |
2298 | (void) fprintf(stderr, "unable to get current timestamp: %s", | |
2299 | strerror(errno)); | |
2300 | return (-1); | |
2301 | } | |
2302 | ||
2303 | filename = strdup(ts->bprm->filename); | |
2304 | base_filename = strdup(basename(filename)); | |
2305 | (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S", | |
2306 | localtime_r(&tv.tv_sec, &tm)); | |
2307 | (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core", | |
2308 | base_filename, timestamp, (int)getpid()); | |
2309 | free(base_filename); | |
2310 | free(filename); | |
2311 | ||
2312 | return (0); | |
2313 | } | |
2314 | ||
2315 | static int dump_write(int fd, const void *ptr, size_t size) | |
2316 | { | |
2317 | const char *bufp = (const char *)ptr; | |
2318 | ssize_t bytes_written, bytes_left; | |
2319 | struct rlimit dumpsize; | |
2320 | off_t pos; | |
2321 | ||
2322 | bytes_written = 0; | |
2323 | getrlimit(RLIMIT_CORE, &dumpsize); | |
2324 | if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { | |
2325 | if (errno == ESPIPE) { /* not a seekable stream */ | |
2326 | bytes_left = size; | |
2327 | } else { | |
2328 | return pos; | |
2329 | } | |
2330 | } else { | |
2331 | if (dumpsize.rlim_cur <= pos) { | |
2332 | return -1; | |
2333 | } else if (dumpsize.rlim_cur == RLIM_INFINITY) { | |
2334 | bytes_left = size; | |
2335 | } else { | |
2336 | size_t limit_left=dumpsize.rlim_cur - pos; | |
2337 | bytes_left = limit_left >= size ? size : limit_left ; | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | /* | |
2342 | * In normal conditions, single write(2) should do but | |
2343 | * in case of socket etc. this mechanism is more portable. | |
2344 | */ | |
2345 | do { | |
2346 | bytes_written = write(fd, bufp, bytes_left); | |
2347 | if (bytes_written < 0) { | |
2348 | if (errno == EINTR) | |
2349 | continue; | |
2350 | return (-1); | |
2351 | } else if (bytes_written == 0) { /* eof */ | |
2352 | return (-1); | |
2353 | } | |
2354 | bufp += bytes_written; | |
2355 | bytes_left -= bytes_written; | |
2356 | } while (bytes_left > 0); | |
2357 | ||
2358 | return (0); | |
2359 | } | |
2360 | ||
2361 | static int write_note(struct memelfnote *men, int fd) | |
2362 | { | |
2363 | struct elf_note en; | |
2364 | ||
2365 | en.n_namesz = men->namesz; | |
2366 | en.n_type = men->type; | |
2367 | en.n_descsz = men->datasz; | |
2368 | ||
2369 | #ifdef BSWAP_NEEDED | |
2370 | bswap_note(&en); | |
2371 | #endif | |
2372 | ||
2373 | if (dump_write(fd, &en, sizeof(en)) != 0) | |
2374 | return (-1); | |
2375 | if (dump_write(fd, men->name, men->namesz_rounded) != 0) | |
2376 | return (-1); | |
2377 | if (dump_write(fd, men->data, men->datasz) != 0) | |
2378 | return (-1); | |
2379 | ||
2380 | return (0); | |
2381 | } | |
2382 | ||
2383 | static void fill_thread_info(struct elf_note_info *info, const CPUState *env) | |
2384 | { | |
2385 | TaskState *ts = (TaskState *)env->opaque; | |
2386 | struct elf_thread_status *ets; | |
2387 | ||
2388 | ets = qemu_mallocz(sizeof (*ets)); | |
2389 | ets->num_notes = 1; /* only prstatus is dumped */ | |
2390 | fill_prstatus(&ets->prstatus, ts, 0); | |
2391 | elf_core_copy_regs(&ets->prstatus.pr_reg, env); | |
2392 | fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), | |
2393 | &ets->prstatus); | |
2394 | ||
72cf2d4f | 2395 | QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); |
edf8e2af MW |
2396 | |
2397 | info->notes_size += note_size(&ets->notes[0]); | |
2398 | } | |
2399 | ||
2400 | static int fill_note_info(struct elf_note_info *info, | |
2401 | long signr, const CPUState *env) | |
2402 | { | |
2403 | #define NUMNOTES 3 | |
2404 | CPUState *cpu = NULL; | |
2405 | TaskState *ts = (TaskState *)env->opaque; | |
2406 | int i; | |
2407 | ||
2408 | (void) memset(info, 0, sizeof (*info)); | |
2409 | ||
72cf2d4f | 2410 | QTAILQ_INIT(&info->thread_list); |
edf8e2af MW |
2411 | |
2412 | info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote)); | |
2413 | if (info->notes == NULL) | |
2414 | return (-ENOMEM); | |
2415 | info->prstatus = qemu_mallocz(sizeof (*info->prstatus)); | |
2416 | if (info->prstatus == NULL) | |
2417 | return (-ENOMEM); | |
2418 | info->psinfo = qemu_mallocz(sizeof (*info->psinfo)); | |
2419 | if (info->prstatus == NULL) | |
2420 | return (-ENOMEM); | |
2421 | ||
2422 | /* | |
2423 | * First fill in status (and registers) of current thread | |
2424 | * including process info & aux vector. | |
2425 | */ | |
2426 | fill_prstatus(info->prstatus, ts, signr); | |
2427 | elf_core_copy_regs(&info->prstatus->pr_reg, env); | |
2428 | fill_note(&info->notes[0], "CORE", NT_PRSTATUS, | |
2429 | sizeof (*info->prstatus), info->prstatus); | |
2430 | fill_psinfo(info->psinfo, ts); | |
2431 | fill_note(&info->notes[1], "CORE", NT_PRPSINFO, | |
2432 | sizeof (*info->psinfo), info->psinfo); | |
2433 | fill_auxv_note(&info->notes[2], ts); | |
2434 | info->numnote = 3; | |
2435 | ||
2436 | info->notes_size = 0; | |
2437 | for (i = 0; i < info->numnote; i++) | |
2438 | info->notes_size += note_size(&info->notes[i]); | |
2439 | ||
2440 | /* read and fill status of all threads */ | |
2441 | cpu_list_lock(); | |
2442 | for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { | |
2443 | if (cpu == thread_env) | |
2444 | continue; | |
2445 | fill_thread_info(info, cpu); | |
2446 | } | |
2447 | cpu_list_unlock(); | |
2448 | ||
2449 | return (0); | |
2450 | } | |
2451 | ||
2452 | static void free_note_info(struct elf_note_info *info) | |
2453 | { | |
2454 | struct elf_thread_status *ets; | |
2455 | ||
72cf2d4f BS |
2456 | while (!QTAILQ_EMPTY(&info->thread_list)) { |
2457 | ets = QTAILQ_FIRST(&info->thread_list); | |
2458 | QTAILQ_REMOVE(&info->thread_list, ets, ets_link); | |
edf8e2af MW |
2459 | qemu_free(ets); |
2460 | } | |
2461 | ||
2462 | qemu_free(info->prstatus); | |
2463 | qemu_free(info->psinfo); | |
2464 | qemu_free(info->notes); | |
2465 | } | |
2466 | ||
2467 | static int write_note_info(struct elf_note_info *info, int fd) | |
2468 | { | |
2469 | struct elf_thread_status *ets; | |
2470 | int i, error = 0; | |
2471 | ||
2472 | /* write prstatus, psinfo and auxv for current thread */ | |
2473 | for (i = 0; i < info->numnote; i++) | |
2474 | if ((error = write_note(&info->notes[i], fd)) != 0) | |
2475 | return (error); | |
2476 | ||
2477 | /* write prstatus for each thread */ | |
2478 | for (ets = info->thread_list.tqh_first; ets != NULL; | |
2479 | ets = ets->ets_link.tqe_next) { | |
2480 | if ((error = write_note(&ets->notes[0], fd)) != 0) | |
2481 | return (error); | |
2482 | } | |
2483 | ||
2484 | return (0); | |
2485 | } | |
2486 | ||
2487 | /* | |
2488 | * Write out ELF coredump. | |
2489 | * | |
2490 | * See documentation of ELF object file format in: | |
2491 | * http://www.caldera.com/developers/devspecs/gabi41.pdf | |
2492 | * | |
2493 | * Coredump format in linux is following: | |
2494 | * | |
2495 | * 0 +----------------------+ \ | |
2496 | * | ELF header | ET_CORE | | |
2497 | * +----------------------+ | | |
2498 | * | ELF program headers | |--- headers | |
2499 | * | - NOTE section | | | |
2500 | * | - PT_LOAD sections | | | |
2501 | * +----------------------+ / | |
2502 | * | NOTEs: | | |
2503 | * | - NT_PRSTATUS | | |
2504 | * | - NT_PRSINFO | | |
2505 | * | - NT_AUXV | | |
2506 | * +----------------------+ <-- aligned to target page | |
2507 | * | Process memory dump | | |
2508 | * : : | |
2509 | * . . | |
2510 | * : : | |
2511 | * | | | |
2512 | * +----------------------+ | |
2513 | * | |
2514 | * NT_PRSTATUS -> struct elf_prstatus (per thread) | |
2515 | * NT_PRSINFO -> struct elf_prpsinfo | |
2516 | * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()). | |
2517 | * | |
2518 | * Format follows System V format as close as possible. Current | |
2519 | * version limitations are as follows: | |
2520 | * - no floating point registers are dumped | |
2521 | * | |
2522 | * Function returns 0 in case of success, negative errno otherwise. | |
2523 | * | |
2524 | * TODO: make this work also during runtime: it should be | |
2525 | * possible to force coredump from running process and then | |
2526 | * continue processing. For example qemu could set up SIGUSR2 | |
2527 | * handler (provided that target process haven't registered | |
2528 | * handler for that) that does the dump when signal is received. | |
2529 | */ | |
2530 | static int elf_core_dump(int signr, const CPUState *env) | |
2531 | { | |
2532 | const TaskState *ts = (const TaskState *)env->opaque; | |
2533 | struct vm_area_struct *vma = NULL; | |
2534 | char corefile[PATH_MAX]; | |
2535 | struct elf_note_info info; | |
2536 | struct elfhdr elf; | |
2537 | struct elf_phdr phdr; | |
2538 | struct rlimit dumpsize; | |
2539 | struct mm_struct *mm = NULL; | |
2540 | off_t offset = 0, data_offset = 0; | |
2541 | int segs = 0; | |
2542 | int fd = -1; | |
2543 | ||
2544 | errno = 0; | |
2545 | getrlimit(RLIMIT_CORE, &dumpsize); | |
2546 | if (dumpsize.rlim_cur == 0) | |
2547 | return 0; | |
2548 | ||
2549 | if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0) | |
2550 | return (-errno); | |
2551 | ||
2552 | if ((fd = open(corefile, O_WRONLY | O_CREAT, | |
2553 | S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0) | |
2554 | return (-errno); | |
2555 | ||
2556 | /* | |
2557 | * Walk through target process memory mappings and | |
2558 | * set up structure containing this information. After | |
2559 | * this point vma_xxx functions can be used. | |
2560 | */ | |
2561 | if ((mm = vma_init()) == NULL) | |
2562 | goto out; | |
2563 | ||
2564 | walk_memory_regions(mm, vma_walker); | |
2565 | segs = vma_get_mapping_count(mm); | |
2566 | ||
2567 | /* | |
2568 | * Construct valid coredump ELF header. We also | |
2569 | * add one more segment for notes. | |
2570 | */ | |
2571 | fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); | |
2572 | if (dump_write(fd, &elf, sizeof (elf)) != 0) | |
2573 | goto out; | |
2574 | ||
2575 | /* fill in in-memory version of notes */ | |
2576 | if (fill_note_info(&info, signr, env) < 0) | |
2577 | goto out; | |
2578 | ||
2579 | offset += sizeof (elf); /* elf header */ | |
2580 | offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ | |
2581 | ||
2582 | /* write out notes program header */ | |
2583 | fill_elf_note_phdr(&phdr, info.notes_size, offset); | |
2584 | ||
2585 | offset += info.notes_size; | |
2586 | if (dump_write(fd, &phdr, sizeof (phdr)) != 0) | |
2587 | goto out; | |
2588 | ||
2589 | /* | |
2590 | * ELF specification wants data to start at page boundary so | |
2591 | * we align it here. | |
2592 | */ | |
2593 | offset = roundup(offset, ELF_EXEC_PAGESIZE); | |
2594 | ||
2595 | /* | |
2596 | * Write program headers for memory regions mapped in | |
2597 | * the target process. | |
2598 | */ | |
2599 | for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { | |
2600 | (void) memset(&phdr, 0, sizeof (phdr)); | |
2601 | ||
2602 | phdr.p_type = PT_LOAD; | |
2603 | phdr.p_offset = offset; | |
2604 | phdr.p_vaddr = vma->vma_start; | |
2605 | phdr.p_paddr = 0; | |
2606 | phdr.p_filesz = vma_dump_size(vma); | |
2607 | offset += phdr.p_filesz; | |
2608 | phdr.p_memsz = vma->vma_end - vma->vma_start; | |
2609 | phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0; | |
2610 | if (vma->vma_flags & PROT_WRITE) | |
2611 | phdr.p_flags |= PF_W; | |
2612 | if (vma->vma_flags & PROT_EXEC) | |
2613 | phdr.p_flags |= PF_X; | |
2614 | phdr.p_align = ELF_EXEC_PAGESIZE; | |
2615 | ||
2616 | dump_write(fd, &phdr, sizeof (phdr)); | |
2617 | } | |
2618 | ||
2619 | /* | |
2620 | * Next we write notes just after program headers. No | |
2621 | * alignment needed here. | |
2622 | */ | |
2623 | if (write_note_info(&info, fd) < 0) | |
2624 | goto out; | |
2625 | ||
2626 | /* align data to page boundary */ | |
2627 | data_offset = lseek(fd, 0, SEEK_CUR); | |
2628 | data_offset = TARGET_PAGE_ALIGN(data_offset); | |
2629 | if (lseek(fd, data_offset, SEEK_SET) != data_offset) | |
2630 | goto out; | |
2631 | ||
2632 | /* | |
2633 | * Finally we can dump process memory into corefile as well. | |
2634 | */ | |
2635 | for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { | |
2636 | abi_ulong addr; | |
2637 | abi_ulong end; | |
2638 | ||
2639 | end = vma->vma_start + vma_dump_size(vma); | |
2640 | ||
2641 | for (addr = vma->vma_start; addr < end; | |
2642 | addr += TARGET_PAGE_SIZE) { | |
2643 | char page[TARGET_PAGE_SIZE]; | |
2644 | int error; | |
2645 | ||
2646 | /* | |
2647 | * Read in page from target process memory and | |
2648 | * write it to coredump file. | |
2649 | */ | |
2650 | error = copy_from_user(page, addr, sizeof (page)); | |
2651 | if (error != 0) { | |
49995e17 | 2652 | (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n", |
edf8e2af MW |
2653 | addr); |
2654 | errno = -error; | |
2655 | goto out; | |
2656 | } | |
2657 | if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) | |
2658 | goto out; | |
2659 | } | |
2660 | } | |
2661 | ||
2662 | out: | |
2663 | free_note_info(&info); | |
2664 | if (mm != NULL) | |
2665 | vma_delete(mm); | |
2666 | (void) close(fd); | |
2667 | ||
2668 | if (errno != 0) | |
2669 | return (-errno); | |
2670 | return (0); | |
2671 | } | |
2672 | ||
2673 | #endif /* USE_ELF_CORE_DUMP */ | |
2674 | ||
31e31b8a FB |
2675 | static int load_aout_interp(void * exptr, int interp_fd) |
2676 | { | |
2677 | printf("a.out interpreter not yet supported\n"); | |
2678 | return(0); | |
2679 | } | |
2680 | ||
e5fe0c52 PB |
2681 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
2682 | { | |
2683 | init_thread(regs, infop); | |
2684 | } |