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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 { | |
d97ef72e RH |
38 | ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ |
39 | FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to | |
40 | descriptors (signal handling) */ | |
41 | MMAP_PAGE_ZERO = 0x0100000, | |
42 | ADDR_COMPAT_LAYOUT = 0x0200000, | |
43 | READ_IMPLIES_EXEC = 0x0400000, | |
44 | ADDR_LIMIT_32BIT = 0x0800000, | |
45 | SHORT_INODE = 0x1000000, | |
46 | WHOLE_SECONDS = 0x2000000, | |
47 | STICKY_TIMEOUTS = 0x4000000, | |
48 | ADDR_LIMIT_3GB = 0x8000000, | |
cb33da57 BS |
49 | }; |
50 | ||
51 | /* | |
52 | * Personality types. | |
53 | * | |
54 | * These go in the low byte. Avoid using the top bit, it will | |
55 | * conflict with error returns. | |
56 | */ | |
57 | enum { | |
d97ef72e RH |
58 | PER_LINUX = 0x0000, |
59 | PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, | |
60 | PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, | |
61 | PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
62 | PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, | |
63 | PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE, | |
64 | PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, | |
65 | PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, | |
66 | PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, | |
67 | PER_BSD = 0x0006, | |
68 | PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, | |
69 | PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, | |
70 | PER_LINUX32 = 0x0008, | |
71 | PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, | |
72 | PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ | |
73 | PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ | |
74 | PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ | |
75 | PER_RISCOS = 0x000c, | |
76 | PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, | |
77 | PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, | |
78 | PER_OSF4 = 0x000f, /* OSF/1 v4 */ | |
79 | PER_HPUX = 0x0010, | |
80 | PER_MASK = 0x00ff, | |
cb33da57 BS |
81 | }; |
82 | ||
83 | /* | |
84 | * Return the base personality without flags. | |
85 | */ | |
d97ef72e | 86 | #define personality(pers) (pers & PER_MASK) |
cb33da57 | 87 | |
83fb7adf FB |
88 | /* this flag is uneffective under linux too, should be deleted */ |
89 | #ifndef MAP_DENYWRITE | |
90 | #define MAP_DENYWRITE 0 | |
91 | #endif | |
92 | ||
93 | /* should probably go in elf.h */ | |
94 | #ifndef ELIBBAD | |
95 | #define ELIBBAD 80 | |
96 | #endif | |
97 | ||
28490231 RH |
98 | #ifdef TARGET_WORDS_BIGENDIAN |
99 | #define ELF_DATA ELFDATA2MSB | |
100 | #else | |
101 | #define ELF_DATA ELFDATA2LSB | |
102 | #endif | |
103 | ||
d97ef72e | 104 | typedef target_ulong target_elf_greg_t; |
21e807fa | 105 | #ifdef USE_UID16 |
80f5ce75 LV |
106 | typedef target_ushort target_uid_t; |
107 | typedef target_ushort target_gid_t; | |
21e807fa | 108 | #else |
80f5ce75 LV |
109 | typedef target_uint target_uid_t; |
110 | typedef target_uint target_gid_t; | |
21e807fa | 111 | #endif |
80f5ce75 | 112 | typedef target_int target_pid_t; |
21e807fa | 113 | |
30ac07d4 FB |
114 | #ifdef TARGET_I386 |
115 | ||
15338fd7 FB |
116 | #define ELF_PLATFORM get_elf_platform() |
117 | ||
118 | static const char *get_elf_platform(void) | |
119 | { | |
120 | static char elf_platform[] = "i386"; | |
d5975363 | 121 | int family = (thread_env->cpuid_version >> 8) & 0xff; |
15338fd7 FB |
122 | if (family > 6) |
123 | family = 6; | |
124 | if (family >= 3) | |
125 | elf_platform[1] = '0' + family; | |
126 | return elf_platform; | |
127 | } | |
128 | ||
129 | #define ELF_HWCAP get_elf_hwcap() | |
130 | ||
131 | static uint32_t get_elf_hwcap(void) | |
132 | { | |
d97ef72e | 133 | return thread_env->cpuid_features; |
15338fd7 FB |
134 | } |
135 | ||
84409ddb JM |
136 | #ifdef TARGET_X86_64 |
137 | #define ELF_START_MMAP 0x2aaaaab000ULL | |
138 | #define elf_check_arch(x) ( ((x) == ELF_ARCH) ) | |
139 | ||
140 | #define ELF_CLASS ELFCLASS64 | |
84409ddb JM |
141 | #define ELF_ARCH EM_X86_64 |
142 | ||
143 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
144 | { | |
145 | regs->rax = 0; | |
146 | regs->rsp = infop->start_stack; | |
147 | regs->rip = infop->entry; | |
148 | } | |
149 | ||
9edc5d79 | 150 | #define ELF_NREG 27 |
c227f099 | 151 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
9edc5d79 MW |
152 | |
153 | /* | |
154 | * Note that ELF_NREG should be 29 as there should be place for | |
155 | * TRAPNO and ERR "registers" as well but linux doesn't dump | |
156 | * those. | |
157 | * | |
158 | * See linux kernel: arch/x86/include/asm/elf.h | |
159 | */ | |
c227f099 | 160 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
9edc5d79 MW |
161 | { |
162 | (*regs)[0] = env->regs[15]; | |
163 | (*regs)[1] = env->regs[14]; | |
164 | (*regs)[2] = env->regs[13]; | |
165 | (*regs)[3] = env->regs[12]; | |
166 | (*regs)[4] = env->regs[R_EBP]; | |
167 | (*regs)[5] = env->regs[R_EBX]; | |
168 | (*regs)[6] = env->regs[11]; | |
169 | (*regs)[7] = env->regs[10]; | |
170 | (*regs)[8] = env->regs[9]; | |
171 | (*regs)[9] = env->regs[8]; | |
172 | (*regs)[10] = env->regs[R_EAX]; | |
173 | (*regs)[11] = env->regs[R_ECX]; | |
174 | (*regs)[12] = env->regs[R_EDX]; | |
175 | (*regs)[13] = env->regs[R_ESI]; | |
176 | (*regs)[14] = env->regs[R_EDI]; | |
177 | (*regs)[15] = env->regs[R_EAX]; /* XXX */ | |
178 | (*regs)[16] = env->eip; | |
179 | (*regs)[17] = env->segs[R_CS].selector & 0xffff; | |
180 | (*regs)[18] = env->eflags; | |
181 | (*regs)[19] = env->regs[R_ESP]; | |
182 | (*regs)[20] = env->segs[R_SS].selector & 0xffff; | |
183 | (*regs)[21] = env->segs[R_FS].selector & 0xffff; | |
184 | (*regs)[22] = env->segs[R_GS].selector & 0xffff; | |
185 | (*regs)[23] = env->segs[R_DS].selector & 0xffff; | |
186 | (*regs)[24] = env->segs[R_ES].selector & 0xffff; | |
187 | (*regs)[25] = env->segs[R_FS].selector & 0xffff; | |
188 | (*regs)[26] = env->segs[R_GS].selector & 0xffff; | |
189 | } | |
190 | ||
84409ddb JM |
191 | #else |
192 | ||
30ac07d4 FB |
193 | #define ELF_START_MMAP 0x80000000 |
194 | ||
30ac07d4 FB |
195 | /* |
196 | * This is used to ensure we don't load something for the wrong architecture. | |
197 | */ | |
198 | #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) | |
199 | ||
200 | /* | |
201 | * These are used to set parameters in the core dumps. | |
202 | */ | |
d97ef72e | 203 | #define ELF_CLASS ELFCLASS32 |
d97ef72e | 204 | #define ELF_ARCH EM_386 |
30ac07d4 | 205 | |
d97ef72e RH |
206 | static inline void init_thread(struct target_pt_regs *regs, |
207 | struct image_info *infop) | |
b346ff46 FB |
208 | { |
209 | regs->esp = infop->start_stack; | |
210 | regs->eip = infop->entry; | |
e5fe0c52 PB |
211 | |
212 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program | |
213 | starts %edx contains a pointer to a function which might be | |
214 | registered using `atexit'. This provides a mean for the | |
215 | dynamic linker to call DT_FINI functions for shared libraries | |
216 | that have been loaded before the code runs. | |
217 | ||
218 | A value of 0 tells we have no such handler. */ | |
219 | regs->edx = 0; | |
b346ff46 | 220 | } |
9edc5d79 | 221 | |
9edc5d79 | 222 | #define ELF_NREG 17 |
c227f099 | 223 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
9edc5d79 MW |
224 | |
225 | /* | |
226 | * Note that ELF_NREG should be 19 as there should be place for | |
227 | * TRAPNO and ERR "registers" as well but linux doesn't dump | |
228 | * those. | |
229 | * | |
230 | * See linux kernel: arch/x86/include/asm/elf.h | |
231 | */ | |
c227f099 | 232 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
9edc5d79 MW |
233 | { |
234 | (*regs)[0] = env->regs[R_EBX]; | |
235 | (*regs)[1] = env->regs[R_ECX]; | |
236 | (*regs)[2] = env->regs[R_EDX]; | |
237 | (*regs)[3] = env->regs[R_ESI]; | |
238 | (*regs)[4] = env->regs[R_EDI]; | |
239 | (*regs)[5] = env->regs[R_EBP]; | |
240 | (*regs)[6] = env->regs[R_EAX]; | |
241 | (*regs)[7] = env->segs[R_DS].selector & 0xffff; | |
242 | (*regs)[8] = env->segs[R_ES].selector & 0xffff; | |
243 | (*regs)[9] = env->segs[R_FS].selector & 0xffff; | |
244 | (*regs)[10] = env->segs[R_GS].selector & 0xffff; | |
245 | (*regs)[11] = env->regs[R_EAX]; /* XXX */ | |
246 | (*regs)[12] = env->eip; | |
247 | (*regs)[13] = env->segs[R_CS].selector & 0xffff; | |
248 | (*regs)[14] = env->eflags; | |
249 | (*regs)[15] = env->regs[R_ESP]; | |
250 | (*regs)[16] = env->segs[R_SS].selector & 0xffff; | |
251 | } | |
84409ddb | 252 | #endif |
b346ff46 | 253 | |
9edc5d79 | 254 | #define USE_ELF_CORE_DUMP |
d97ef72e | 255 | #define ELF_EXEC_PAGESIZE 4096 |
b346ff46 FB |
256 | |
257 | #endif | |
258 | ||
259 | #ifdef TARGET_ARM | |
260 | ||
261 | #define ELF_START_MMAP 0x80000000 | |
262 | ||
263 | #define elf_check_arch(x) ( (x) == EM_ARM ) | |
264 | ||
d97ef72e | 265 | #define ELF_CLASS ELFCLASS32 |
d97ef72e | 266 | #define ELF_ARCH EM_ARM |
b346ff46 | 267 | |
d97ef72e RH |
268 | static inline void init_thread(struct target_pt_regs *regs, |
269 | struct image_info *infop) | |
b346ff46 | 270 | { |
992f48a0 | 271 | abi_long stack = infop->start_stack; |
b346ff46 FB |
272 | memset(regs, 0, sizeof(*regs)); |
273 | regs->ARM_cpsr = 0x10; | |
0240ded8 | 274 | if (infop->entry & 1) |
d97ef72e | 275 | regs->ARM_cpsr |= CPSR_T; |
0240ded8 | 276 | regs->ARM_pc = infop->entry & 0xfffffffe; |
b346ff46 | 277 | regs->ARM_sp = infop->start_stack; |
2f619698 FB |
278 | /* FIXME - what to for failure of get_user()? */ |
279 | get_user_ual(regs->ARM_r2, stack + 8); /* envp */ | |
280 | get_user_ual(regs->ARM_r1, stack + 4); /* envp */ | |
a1516e92 | 281 | /* XXX: it seems that r0 is zeroed after ! */ |
e5fe0c52 PB |
282 | regs->ARM_r0 = 0; |
283 | /* For uClinux PIC binaries. */ | |
863cf0b7 | 284 | /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ |
e5fe0c52 | 285 | regs->ARM_r10 = infop->start_data; |
b346ff46 FB |
286 | } |
287 | ||
edf8e2af | 288 | #define ELF_NREG 18 |
c227f099 | 289 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
edf8e2af | 290 | |
c227f099 | 291 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
edf8e2af | 292 | { |
d049e626 NF |
293 | (*regs)[0] = tswapl(env->regs[0]); |
294 | (*regs)[1] = tswapl(env->regs[1]); | |
295 | (*regs)[2] = tswapl(env->regs[2]); | |
296 | (*regs)[3] = tswapl(env->regs[3]); | |
297 | (*regs)[4] = tswapl(env->regs[4]); | |
298 | (*regs)[5] = tswapl(env->regs[5]); | |
299 | (*regs)[6] = tswapl(env->regs[6]); | |
300 | (*regs)[7] = tswapl(env->regs[7]); | |
301 | (*regs)[8] = tswapl(env->regs[8]); | |
302 | (*regs)[9] = tswapl(env->regs[9]); | |
303 | (*regs)[10] = tswapl(env->regs[10]); | |
304 | (*regs)[11] = tswapl(env->regs[11]); | |
305 | (*regs)[12] = tswapl(env->regs[12]); | |
306 | (*regs)[13] = tswapl(env->regs[13]); | |
307 | (*regs)[14] = tswapl(env->regs[14]); | |
308 | (*regs)[15] = tswapl(env->regs[15]); | |
309 | ||
310 | (*regs)[16] = tswapl(cpsr_read((CPUState *)env)); | |
311 | (*regs)[17] = tswapl(env->regs[0]); /* XXX */ | |
edf8e2af MW |
312 | } |
313 | ||
30ac07d4 | 314 | #define USE_ELF_CORE_DUMP |
d97ef72e | 315 | #define ELF_EXEC_PAGESIZE 4096 |
30ac07d4 | 316 | |
afce2927 FB |
317 | enum |
318 | { | |
d97ef72e RH |
319 | ARM_HWCAP_ARM_SWP = 1 << 0, |
320 | ARM_HWCAP_ARM_HALF = 1 << 1, | |
321 | ARM_HWCAP_ARM_THUMB = 1 << 2, | |
322 | ARM_HWCAP_ARM_26BIT = 1 << 3, | |
323 | ARM_HWCAP_ARM_FAST_MULT = 1 << 4, | |
324 | ARM_HWCAP_ARM_FPA = 1 << 5, | |
325 | ARM_HWCAP_ARM_VFP = 1 << 6, | |
326 | ARM_HWCAP_ARM_EDSP = 1 << 7, | |
327 | ARM_HWCAP_ARM_JAVA = 1 << 8, | |
328 | ARM_HWCAP_ARM_IWMMXT = 1 << 9, | |
329 | ARM_HWCAP_ARM_THUMBEE = 1 << 10, | |
330 | ARM_HWCAP_ARM_NEON = 1 << 11, | |
331 | ARM_HWCAP_ARM_VFPv3 = 1 << 12, | |
332 | ARM_HWCAP_ARM_VFPv3D16 = 1 << 13, | |
afce2927 FB |
333 | }; |
334 | ||
d97ef72e RH |
335 | #define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \ |
336 | | ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ | |
337 | | ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \ | |
338 | | ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 ) | |
afce2927 | 339 | |
30ac07d4 FB |
340 | #endif |
341 | ||
d2fbca94 GX |
342 | #ifdef TARGET_UNICORE32 |
343 | ||
344 | #define ELF_START_MMAP 0x80000000 | |
345 | ||
346 | #define elf_check_arch(x) ((x) == EM_UNICORE32) | |
347 | ||
348 | #define ELF_CLASS ELFCLASS32 | |
349 | #define ELF_DATA ELFDATA2LSB | |
350 | #define ELF_ARCH EM_UNICORE32 | |
351 | ||
352 | static inline void init_thread(struct target_pt_regs *regs, | |
353 | struct image_info *infop) | |
354 | { | |
355 | abi_long stack = infop->start_stack; | |
356 | memset(regs, 0, sizeof(*regs)); | |
357 | regs->UC32_REG_asr = 0x10; | |
358 | regs->UC32_REG_pc = infop->entry & 0xfffffffe; | |
359 | regs->UC32_REG_sp = infop->start_stack; | |
360 | /* FIXME - what to for failure of get_user()? */ | |
361 | get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */ | |
362 | get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */ | |
363 | /* XXX: it seems that r0 is zeroed after ! */ | |
364 | regs->UC32_REG_00 = 0; | |
365 | } | |
366 | ||
367 | #define ELF_NREG 34 | |
368 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
369 | ||
370 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
371 | { | |
372 | (*regs)[0] = env->regs[0]; | |
373 | (*regs)[1] = env->regs[1]; | |
374 | (*regs)[2] = env->regs[2]; | |
375 | (*regs)[3] = env->regs[3]; | |
376 | (*regs)[4] = env->regs[4]; | |
377 | (*regs)[5] = env->regs[5]; | |
378 | (*regs)[6] = env->regs[6]; | |
379 | (*regs)[7] = env->regs[7]; | |
380 | (*regs)[8] = env->regs[8]; | |
381 | (*regs)[9] = env->regs[9]; | |
382 | (*regs)[10] = env->regs[10]; | |
383 | (*regs)[11] = env->regs[11]; | |
384 | (*regs)[12] = env->regs[12]; | |
385 | (*regs)[13] = env->regs[13]; | |
386 | (*regs)[14] = env->regs[14]; | |
387 | (*regs)[15] = env->regs[15]; | |
388 | (*regs)[16] = env->regs[16]; | |
389 | (*regs)[17] = env->regs[17]; | |
390 | (*regs)[18] = env->regs[18]; | |
391 | (*regs)[19] = env->regs[19]; | |
392 | (*regs)[20] = env->regs[20]; | |
393 | (*regs)[21] = env->regs[21]; | |
394 | (*regs)[22] = env->regs[22]; | |
395 | (*regs)[23] = env->regs[23]; | |
396 | (*regs)[24] = env->regs[24]; | |
397 | (*regs)[25] = env->regs[25]; | |
398 | (*regs)[26] = env->regs[26]; | |
399 | (*regs)[27] = env->regs[27]; | |
400 | (*regs)[28] = env->regs[28]; | |
401 | (*regs)[29] = env->regs[29]; | |
402 | (*regs)[30] = env->regs[30]; | |
403 | (*regs)[31] = env->regs[31]; | |
404 | ||
405 | (*regs)[32] = cpu_asr_read((CPUState *)env); | |
406 | (*regs)[33] = env->regs[0]; /* XXX */ | |
407 | } | |
408 | ||
409 | #define USE_ELF_CORE_DUMP | |
410 | #define ELF_EXEC_PAGESIZE 4096 | |
411 | ||
412 | #define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64) | |
413 | ||
414 | #endif | |
415 | ||
853d6f7a | 416 | #ifdef TARGET_SPARC |
a315a145 | 417 | #ifdef TARGET_SPARC64 |
853d6f7a FB |
418 | |
419 | #define ELF_START_MMAP 0x80000000 | |
cf973e46 AT |
420 | #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ |
421 | | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9) | |
992f48a0 | 422 | #ifndef TARGET_ABI32 |
cb33da57 | 423 | #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS ) |
992f48a0 BS |
424 | #else |
425 | #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC ) | |
426 | #endif | |
853d6f7a | 427 | |
a315a145 | 428 | #define ELF_CLASS ELFCLASS64 |
5ef54116 FB |
429 | #define ELF_ARCH EM_SPARCV9 |
430 | ||
d97ef72e | 431 | #define STACK_BIAS 2047 |
a315a145 | 432 | |
d97ef72e RH |
433 | static inline void init_thread(struct target_pt_regs *regs, |
434 | struct image_info *infop) | |
a315a145 | 435 | { |
992f48a0 | 436 | #ifndef TARGET_ABI32 |
a315a145 | 437 | regs->tstate = 0; |
992f48a0 | 438 | #endif |
a315a145 FB |
439 | regs->pc = infop->entry; |
440 | regs->npc = regs->pc + 4; | |
441 | regs->y = 0; | |
992f48a0 BS |
442 | #ifdef TARGET_ABI32 |
443 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
444 | #else | |
cb33da57 BS |
445 | if (personality(infop->personality) == PER_LINUX32) |
446 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
447 | else | |
448 | regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; | |
992f48a0 | 449 | #endif |
a315a145 FB |
450 | } |
451 | ||
452 | #else | |
453 | #define ELF_START_MMAP 0x80000000 | |
cf973e46 AT |
454 | #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ |
455 | | HWCAP_SPARC_MULDIV) | |
a315a145 FB |
456 | #define elf_check_arch(x) ( (x) == EM_SPARC ) |
457 | ||
853d6f7a | 458 | #define ELF_CLASS ELFCLASS32 |
853d6f7a FB |
459 | #define ELF_ARCH EM_SPARC |
460 | ||
d97ef72e RH |
461 | static inline void init_thread(struct target_pt_regs *regs, |
462 | struct image_info *infop) | |
853d6f7a | 463 | { |
f5155289 FB |
464 | regs->psr = 0; |
465 | regs->pc = infop->entry; | |
466 | regs->npc = regs->pc + 4; | |
467 | regs->y = 0; | |
468 | regs->u_regs[14] = infop->start_stack - 16 * 4; | |
853d6f7a FB |
469 | } |
470 | ||
a315a145 | 471 | #endif |
853d6f7a FB |
472 | #endif |
473 | ||
67867308 FB |
474 | #ifdef TARGET_PPC |
475 | ||
476 | #define ELF_START_MMAP 0x80000000 | |
477 | ||
e85e7c6e | 478 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) |
84409ddb JM |
479 | |
480 | #define elf_check_arch(x) ( (x) == EM_PPC64 ) | |
481 | ||
d97ef72e | 482 | #define ELF_CLASS ELFCLASS64 |
84409ddb JM |
483 | |
484 | #else | |
485 | ||
67867308 FB |
486 | #define elf_check_arch(x) ( (x) == EM_PPC ) |
487 | ||
d97ef72e | 488 | #define ELF_CLASS ELFCLASS32 |
84409ddb JM |
489 | |
490 | #endif | |
491 | ||
d97ef72e | 492 | #define ELF_ARCH EM_PPC |
67867308 | 493 | |
df84e4f3 NF |
494 | /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP). |
495 | See arch/powerpc/include/asm/cputable.h. */ | |
496 | enum { | |
3efa9a67 | 497 | QEMU_PPC_FEATURE_32 = 0x80000000, |
498 | QEMU_PPC_FEATURE_64 = 0x40000000, | |
499 | QEMU_PPC_FEATURE_601_INSTR = 0x20000000, | |
500 | QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000, | |
501 | QEMU_PPC_FEATURE_HAS_FPU = 0x08000000, | |
502 | QEMU_PPC_FEATURE_HAS_MMU = 0x04000000, | |
503 | QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000, | |
504 | QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000, | |
505 | QEMU_PPC_FEATURE_HAS_SPE = 0x00800000, | |
506 | QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000, | |
507 | QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000, | |
508 | QEMU_PPC_FEATURE_NO_TB = 0x00100000, | |
509 | QEMU_PPC_FEATURE_POWER4 = 0x00080000, | |
510 | QEMU_PPC_FEATURE_POWER5 = 0x00040000, | |
511 | QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000, | |
512 | QEMU_PPC_FEATURE_CELL = 0x00010000, | |
513 | QEMU_PPC_FEATURE_BOOKE = 0x00008000, | |
514 | QEMU_PPC_FEATURE_SMT = 0x00004000, | |
515 | QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000, | |
516 | QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000, | |
517 | QEMU_PPC_FEATURE_PA6T = 0x00000800, | |
518 | QEMU_PPC_FEATURE_HAS_DFP = 0x00000400, | |
519 | QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200, | |
520 | QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100, | |
521 | QEMU_PPC_FEATURE_HAS_VSX = 0x00000080, | |
522 | QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040, | |
523 | ||
524 | QEMU_PPC_FEATURE_TRUE_LE = 0x00000002, | |
525 | QEMU_PPC_FEATURE_PPC_LE = 0x00000001, | |
df84e4f3 NF |
526 | }; |
527 | ||
528 | #define ELF_HWCAP get_elf_hwcap() | |
529 | ||
530 | static uint32_t get_elf_hwcap(void) | |
531 | { | |
532 | CPUState *e = thread_env; | |
533 | uint32_t features = 0; | |
534 | ||
535 | /* We don't have to be terribly complete here; the high points are | |
536 | Altivec/FP/SPE support. Anything else is just a bonus. */ | |
d97ef72e | 537 | #define GET_FEATURE(flag, feature) \ |
df84e4f3 | 538 | do {if (e->insns_flags & flag) features |= feature; } while(0) |
3efa9a67 | 539 | GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); |
540 | GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); | |
541 | GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); | |
542 | GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); | |
543 | GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); | |
544 | GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); | |
545 | GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); | |
546 | GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); | |
df84e4f3 NF |
547 | #undef GET_FEATURE |
548 | ||
549 | return features; | |
550 | } | |
551 | ||
f5155289 FB |
552 | /* |
553 | * The requirements here are: | |
554 | * - keep the final alignment of sp (sp & 0xf) | |
555 | * - make sure the 32-bit value at the first 16 byte aligned position of | |
556 | * AUXV is greater than 16 for glibc compatibility. | |
557 | * AT_IGNOREPPC is used for that. | |
558 | * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, | |
559 | * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. | |
560 | */ | |
0bccf03d | 561 | #define DLINFO_ARCH_ITEMS 5 |
d97ef72e RH |
562 | #define ARCH_DLINFO \ |
563 | do { \ | |
564 | NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \ | |
565 | NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \ | |
566 | NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ | |
567 | /* \ | |
568 | * Now handle glibc compatibility. \ | |
569 | */ \ | |
570 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
571 | NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ | |
572 | } while (0) | |
f5155289 | 573 | |
67867308 FB |
574 | static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
575 | { | |
67867308 | 576 | _regs->gpr[1] = infop->start_stack; |
e85e7c6e | 577 | #if defined(TARGET_PPC64) && !defined(TARGET_ABI32) |
7983f435 RL |
578 | _regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_addr; |
579 | infop->entry = ldq_raw(infop->entry) + infop->load_addr; | |
84409ddb | 580 | #endif |
67867308 FB |
581 | _regs->nip = infop->entry; |
582 | } | |
583 | ||
e2f3e741 NF |
584 | /* See linux kernel: arch/powerpc/include/asm/elf.h. */ |
585 | #define ELF_NREG 48 | |
586 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
587 | ||
588 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
589 | { | |
590 | int i; | |
591 | target_ulong ccr = 0; | |
592 | ||
593 | for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { | |
594 | (*regs)[i] = tswapl(env->gpr[i]); | |
595 | } | |
596 | ||
597 | (*regs)[32] = tswapl(env->nip); | |
598 | (*regs)[33] = tswapl(env->msr); | |
599 | (*regs)[35] = tswapl(env->ctr); | |
600 | (*regs)[36] = tswapl(env->lr); | |
601 | (*regs)[37] = tswapl(env->xer); | |
602 | ||
603 | for (i = 0; i < ARRAY_SIZE(env->crf); i++) { | |
604 | ccr |= env->crf[i] << (32 - ((i + 1) * 4)); | |
605 | } | |
606 | (*regs)[38] = tswapl(ccr); | |
607 | } | |
608 | ||
609 | #define USE_ELF_CORE_DUMP | |
d97ef72e | 610 | #define ELF_EXEC_PAGESIZE 4096 |
67867308 FB |
611 | |
612 | #endif | |
613 | ||
048f6b4d FB |
614 | #ifdef TARGET_MIPS |
615 | ||
616 | #define ELF_START_MMAP 0x80000000 | |
617 | ||
618 | #define elf_check_arch(x) ( (x) == EM_MIPS ) | |
619 | ||
388bb21a TS |
620 | #ifdef TARGET_MIPS64 |
621 | #define ELF_CLASS ELFCLASS64 | |
622 | #else | |
048f6b4d | 623 | #define ELF_CLASS ELFCLASS32 |
388bb21a | 624 | #endif |
048f6b4d FB |
625 | #define ELF_ARCH EM_MIPS |
626 | ||
d97ef72e RH |
627 | static inline void init_thread(struct target_pt_regs *regs, |
628 | struct image_info *infop) | |
048f6b4d | 629 | { |
623a930e | 630 | regs->cp0_status = 2 << CP0St_KSU; |
048f6b4d FB |
631 | regs->cp0_epc = infop->entry; |
632 | regs->regs[29] = infop->start_stack; | |
633 | } | |
634 | ||
51e52606 NF |
635 | /* See linux kernel: arch/mips/include/asm/elf.h. */ |
636 | #define ELF_NREG 45 | |
637 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
638 | ||
639 | /* See linux kernel: arch/mips/include/asm/reg.h. */ | |
640 | enum { | |
641 | #ifdef TARGET_MIPS64 | |
642 | TARGET_EF_R0 = 0, | |
643 | #else | |
644 | TARGET_EF_R0 = 6, | |
645 | #endif | |
646 | TARGET_EF_R26 = TARGET_EF_R0 + 26, | |
647 | TARGET_EF_R27 = TARGET_EF_R0 + 27, | |
648 | TARGET_EF_LO = TARGET_EF_R0 + 32, | |
649 | TARGET_EF_HI = TARGET_EF_R0 + 33, | |
650 | TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34, | |
651 | TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35, | |
652 | TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36, | |
653 | TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37 | |
654 | }; | |
655 | ||
656 | /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ | |
657 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
658 | { | |
659 | int i; | |
660 | ||
661 | for (i = 0; i < TARGET_EF_R0; i++) { | |
662 | (*regs)[i] = 0; | |
663 | } | |
664 | (*regs)[TARGET_EF_R0] = 0; | |
665 | ||
666 | for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { | |
667 | (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]); | |
668 | } | |
669 | ||
670 | (*regs)[TARGET_EF_R26] = 0; | |
671 | (*regs)[TARGET_EF_R27] = 0; | |
672 | (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]); | |
673 | (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]); | |
674 | (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC); | |
675 | (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr); | |
676 | (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status); | |
677 | (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause); | |
678 | } | |
679 | ||
680 | #define USE_ELF_CORE_DUMP | |
388bb21a TS |
681 | #define ELF_EXEC_PAGESIZE 4096 |
682 | ||
048f6b4d FB |
683 | #endif /* TARGET_MIPS */ |
684 | ||
b779e29e EI |
685 | #ifdef TARGET_MICROBLAZE |
686 | ||
687 | #define ELF_START_MMAP 0x80000000 | |
688 | ||
0d5d4699 | 689 | #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD) |
b779e29e EI |
690 | |
691 | #define ELF_CLASS ELFCLASS32 | |
0d5d4699 | 692 | #define ELF_ARCH EM_MICROBLAZE |
b779e29e | 693 | |
d97ef72e RH |
694 | static inline void init_thread(struct target_pt_regs *regs, |
695 | struct image_info *infop) | |
b779e29e EI |
696 | { |
697 | regs->pc = infop->entry; | |
698 | regs->r1 = infop->start_stack; | |
699 | ||
700 | } | |
701 | ||
b779e29e EI |
702 | #define ELF_EXEC_PAGESIZE 4096 |
703 | ||
e4cbd44d EI |
704 | #define USE_ELF_CORE_DUMP |
705 | #define ELF_NREG 38 | |
706 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
707 | ||
708 | /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ | |
709 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
710 | { | |
711 | int i, pos = 0; | |
712 | ||
713 | for (i = 0; i < 32; i++) { | |
714 | (*regs)[pos++] = tswapl(env->regs[i]); | |
715 | } | |
716 | ||
717 | for (i = 0; i < 6; i++) { | |
718 | (*regs)[pos++] = tswapl(env->sregs[i]); | |
719 | } | |
720 | } | |
721 | ||
b779e29e EI |
722 | #endif /* TARGET_MICROBLAZE */ |
723 | ||
fdf9b3e8 FB |
724 | #ifdef TARGET_SH4 |
725 | ||
726 | #define ELF_START_MMAP 0x80000000 | |
727 | ||
728 | #define elf_check_arch(x) ( (x) == EM_SH ) | |
729 | ||
730 | #define ELF_CLASS ELFCLASS32 | |
fdf9b3e8 FB |
731 | #define ELF_ARCH EM_SH |
732 | ||
d97ef72e RH |
733 | static inline void init_thread(struct target_pt_regs *regs, |
734 | struct image_info *infop) | |
fdf9b3e8 | 735 | { |
d97ef72e RH |
736 | /* Check other registers XXXXX */ |
737 | regs->pc = infop->entry; | |
738 | regs->regs[15] = infop->start_stack; | |
fdf9b3e8 FB |
739 | } |
740 | ||
7631c97e NF |
741 | /* See linux kernel: arch/sh/include/asm/elf.h. */ |
742 | #define ELF_NREG 23 | |
743 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
744 | ||
745 | /* See linux kernel: arch/sh/include/asm/ptrace.h. */ | |
746 | enum { | |
747 | TARGET_REG_PC = 16, | |
748 | TARGET_REG_PR = 17, | |
749 | TARGET_REG_SR = 18, | |
750 | TARGET_REG_GBR = 19, | |
751 | TARGET_REG_MACH = 20, | |
752 | TARGET_REG_MACL = 21, | |
753 | TARGET_REG_SYSCALL = 22 | |
754 | }; | |
755 | ||
d97ef72e RH |
756 | static inline void elf_core_copy_regs(target_elf_gregset_t *regs, |
757 | const CPUState *env) | |
7631c97e NF |
758 | { |
759 | int i; | |
760 | ||
761 | for (i = 0; i < 16; i++) { | |
762 | (*regs[i]) = tswapl(env->gregs[i]); | |
763 | } | |
764 | ||
765 | (*regs)[TARGET_REG_PC] = tswapl(env->pc); | |
766 | (*regs)[TARGET_REG_PR] = tswapl(env->pr); | |
767 | (*regs)[TARGET_REG_SR] = tswapl(env->sr); | |
768 | (*regs)[TARGET_REG_GBR] = tswapl(env->gbr); | |
769 | (*regs)[TARGET_REG_MACH] = tswapl(env->mach); | |
770 | (*regs)[TARGET_REG_MACL] = tswapl(env->macl); | |
771 | (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */ | |
772 | } | |
773 | ||
774 | #define USE_ELF_CORE_DUMP | |
fdf9b3e8 FB |
775 | #define ELF_EXEC_PAGESIZE 4096 |
776 | ||
777 | #endif | |
778 | ||
48733d19 TS |
779 | #ifdef TARGET_CRIS |
780 | ||
781 | #define ELF_START_MMAP 0x80000000 | |
782 | ||
783 | #define elf_check_arch(x) ( (x) == EM_CRIS ) | |
784 | ||
785 | #define ELF_CLASS ELFCLASS32 | |
48733d19 TS |
786 | #define ELF_ARCH EM_CRIS |
787 | ||
d97ef72e RH |
788 | static inline void init_thread(struct target_pt_regs *regs, |
789 | struct image_info *infop) | |
48733d19 | 790 | { |
d97ef72e | 791 | regs->erp = infop->entry; |
48733d19 TS |
792 | } |
793 | ||
48733d19 TS |
794 | #define ELF_EXEC_PAGESIZE 8192 |
795 | ||
796 | #endif | |
797 | ||
e6e5906b PB |
798 | #ifdef TARGET_M68K |
799 | ||
800 | #define ELF_START_MMAP 0x80000000 | |
801 | ||
802 | #define elf_check_arch(x) ( (x) == EM_68K ) | |
803 | ||
d97ef72e | 804 | #define ELF_CLASS ELFCLASS32 |
d97ef72e | 805 | #define ELF_ARCH EM_68K |
e6e5906b PB |
806 | |
807 | /* ??? Does this need to do anything? | |
d97ef72e | 808 | #define ELF_PLAT_INIT(_r) */ |
e6e5906b | 809 | |
d97ef72e RH |
810 | static inline void init_thread(struct target_pt_regs *regs, |
811 | struct image_info *infop) | |
e6e5906b PB |
812 | { |
813 | regs->usp = infop->start_stack; | |
814 | regs->sr = 0; | |
815 | regs->pc = infop->entry; | |
816 | } | |
817 | ||
7a93cc55 NF |
818 | /* See linux kernel: arch/m68k/include/asm/elf.h. */ |
819 | #define ELF_NREG 20 | |
820 | typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; | |
821 | ||
822 | static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) | |
823 | { | |
824 | (*regs)[0] = tswapl(env->dregs[1]); | |
825 | (*regs)[1] = tswapl(env->dregs[2]); | |
826 | (*regs)[2] = tswapl(env->dregs[3]); | |
827 | (*regs)[3] = tswapl(env->dregs[4]); | |
828 | (*regs)[4] = tswapl(env->dregs[5]); | |
829 | (*regs)[5] = tswapl(env->dregs[6]); | |
830 | (*regs)[6] = tswapl(env->dregs[7]); | |
831 | (*regs)[7] = tswapl(env->aregs[0]); | |
832 | (*regs)[8] = tswapl(env->aregs[1]); | |
833 | (*regs)[9] = tswapl(env->aregs[2]); | |
834 | (*regs)[10] = tswapl(env->aregs[3]); | |
835 | (*regs)[11] = tswapl(env->aregs[4]); | |
836 | (*regs)[12] = tswapl(env->aregs[5]); | |
837 | (*regs)[13] = tswapl(env->aregs[6]); | |
838 | (*regs)[14] = tswapl(env->dregs[0]); | |
839 | (*regs)[15] = tswapl(env->aregs[7]); | |
840 | (*regs)[16] = tswapl(env->dregs[0]); /* FIXME: orig_d0 */ | |
841 | (*regs)[17] = tswapl(env->sr); | |
842 | (*regs)[18] = tswapl(env->pc); | |
843 | (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */ | |
844 | } | |
845 | ||
846 | #define USE_ELF_CORE_DUMP | |
d97ef72e | 847 | #define ELF_EXEC_PAGESIZE 8192 |
e6e5906b PB |
848 | |
849 | #endif | |
850 | ||
7a3148a9 JM |
851 | #ifdef TARGET_ALPHA |
852 | ||
853 | #define ELF_START_MMAP (0x30000000000ULL) | |
854 | ||
855 | #define elf_check_arch(x) ( (x) == ELF_ARCH ) | |
856 | ||
857 | #define ELF_CLASS ELFCLASS64 | |
7a3148a9 JM |
858 | #define ELF_ARCH EM_ALPHA |
859 | ||
d97ef72e RH |
860 | static inline void init_thread(struct target_pt_regs *regs, |
861 | struct image_info *infop) | |
7a3148a9 JM |
862 | { |
863 | regs->pc = infop->entry; | |
864 | regs->ps = 8; | |
865 | regs->usp = infop->start_stack; | |
7a3148a9 JM |
866 | } |
867 | ||
7a3148a9 JM |
868 | #define ELF_EXEC_PAGESIZE 8192 |
869 | ||
870 | #endif /* TARGET_ALPHA */ | |
871 | ||
a4c075f1 UH |
872 | #ifdef TARGET_S390X |
873 | ||
874 | #define ELF_START_MMAP (0x20000000000ULL) | |
875 | ||
876 | #define elf_check_arch(x) ( (x) == ELF_ARCH ) | |
877 | ||
878 | #define ELF_CLASS ELFCLASS64 | |
879 | #define ELF_DATA ELFDATA2MSB | |
880 | #define ELF_ARCH EM_S390 | |
881 | ||
882 | static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) | |
883 | { | |
884 | regs->psw.addr = infop->entry; | |
885 | regs->psw.mask = PSW_MASK_64 | PSW_MASK_32; | |
886 | regs->gprs[15] = infop->start_stack; | |
887 | } | |
888 | ||
889 | #endif /* TARGET_S390X */ | |
890 | ||
15338fd7 FB |
891 | #ifndef ELF_PLATFORM |
892 | #define ELF_PLATFORM (NULL) | |
893 | #endif | |
894 | ||
895 | #ifndef ELF_HWCAP | |
896 | #define ELF_HWCAP 0 | |
897 | #endif | |
898 | ||
992f48a0 | 899 | #ifdef TARGET_ABI32 |
cb33da57 | 900 | #undef ELF_CLASS |
992f48a0 | 901 | #define ELF_CLASS ELFCLASS32 |
cb33da57 BS |
902 | #undef bswaptls |
903 | #define bswaptls(ptr) bswap32s(ptr) | |
904 | #endif | |
905 | ||
31e31b8a | 906 | #include "elf.h" |
09bfb054 | 907 | |
09bfb054 FB |
908 | struct exec |
909 | { | |
d97ef72e RH |
910 | unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
911 | unsigned int a_text; /* length of text, in bytes */ | |
912 | unsigned int a_data; /* length of data, in bytes */ | |
913 | unsigned int a_bss; /* length of uninitialized data area, in bytes */ | |
914 | unsigned int a_syms; /* length of symbol table data in file, in bytes */ | |
915 | unsigned int a_entry; /* start address */ | |
916 | unsigned int a_trsize; /* length of relocation info for text, in bytes */ | |
917 | unsigned int a_drsize; /* length of relocation info for data, in bytes */ | |
09bfb054 FB |
918 | }; |
919 | ||
920 | ||
921 | #define N_MAGIC(exec) ((exec).a_info & 0xffff) | |
922 | #define OMAGIC 0407 | |
923 | #define NMAGIC 0410 | |
924 | #define ZMAGIC 0413 | |
925 | #define QMAGIC 0314 | |
926 | ||
31e31b8a | 927 | /* Necessary parameters */ |
54936004 FB |
928 | #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE |
929 | #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) | |
930 | #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) | |
31e31b8a | 931 | |
14322bad | 932 | #define DLINFO_ITEMS 13 |
31e31b8a | 933 | |
09bfb054 FB |
934 | static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
935 | { | |
d97ef72e | 936 | memcpy(to, from, n); |
09bfb054 | 937 | } |
d691f669 | 938 | |
31e31b8a | 939 | #ifdef BSWAP_NEEDED |
92a31b1f | 940 | static void bswap_ehdr(struct elfhdr *ehdr) |
31e31b8a | 941 | { |
d97ef72e RH |
942 | bswap16s(&ehdr->e_type); /* Object file type */ |
943 | bswap16s(&ehdr->e_machine); /* Architecture */ | |
944 | bswap32s(&ehdr->e_version); /* Object file version */ | |
945 | bswaptls(&ehdr->e_entry); /* Entry point virtual address */ | |
946 | bswaptls(&ehdr->e_phoff); /* Program header table file offset */ | |
947 | bswaptls(&ehdr->e_shoff); /* Section header table file offset */ | |
948 | bswap32s(&ehdr->e_flags); /* Processor-specific flags */ | |
949 | bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ | |
950 | bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ | |
951 | bswap16s(&ehdr->e_phnum); /* Program header table entry count */ | |
952 | bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ | |
953 | bswap16s(&ehdr->e_shnum); /* Section header table entry count */ | |
954 | bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ | |
31e31b8a FB |
955 | } |
956 | ||
991f8f0c | 957 | static void bswap_phdr(struct elf_phdr *phdr, int phnum) |
31e31b8a | 958 | { |
991f8f0c RH |
959 | int i; |
960 | for (i = 0; i < phnum; ++i, ++phdr) { | |
961 | bswap32s(&phdr->p_type); /* Segment type */ | |
962 | bswap32s(&phdr->p_flags); /* Segment flags */ | |
963 | bswaptls(&phdr->p_offset); /* Segment file offset */ | |
964 | bswaptls(&phdr->p_vaddr); /* Segment virtual address */ | |
965 | bswaptls(&phdr->p_paddr); /* Segment physical address */ | |
966 | bswaptls(&phdr->p_filesz); /* Segment size in file */ | |
967 | bswaptls(&phdr->p_memsz); /* Segment size in memory */ | |
968 | bswaptls(&phdr->p_align); /* Segment alignment */ | |
969 | } | |
31e31b8a | 970 | } |
689f936f | 971 | |
991f8f0c | 972 | static void bswap_shdr(struct elf_shdr *shdr, int shnum) |
689f936f | 973 | { |
991f8f0c RH |
974 | int i; |
975 | for (i = 0; i < shnum; ++i, ++shdr) { | |
976 | bswap32s(&shdr->sh_name); | |
977 | bswap32s(&shdr->sh_type); | |
978 | bswaptls(&shdr->sh_flags); | |
979 | bswaptls(&shdr->sh_addr); | |
980 | bswaptls(&shdr->sh_offset); | |
981 | bswaptls(&shdr->sh_size); | |
982 | bswap32s(&shdr->sh_link); | |
983 | bswap32s(&shdr->sh_info); | |
984 | bswaptls(&shdr->sh_addralign); | |
985 | bswaptls(&shdr->sh_entsize); | |
986 | } | |
689f936f FB |
987 | } |
988 | ||
7a3148a9 | 989 | static void bswap_sym(struct elf_sym *sym) |
689f936f FB |
990 | { |
991 | bswap32s(&sym->st_name); | |
7a3148a9 JM |
992 | bswaptls(&sym->st_value); |
993 | bswaptls(&sym->st_size); | |
689f936f FB |
994 | bswap16s(&sym->st_shndx); |
995 | } | |
991f8f0c RH |
996 | #else |
997 | static inline void bswap_ehdr(struct elfhdr *ehdr) { } | |
998 | static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { } | |
999 | static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { } | |
1000 | static inline void bswap_sym(struct elf_sym *sym) { } | |
31e31b8a FB |
1001 | #endif |
1002 | ||
edf8e2af MW |
1003 | #ifdef USE_ELF_CORE_DUMP |
1004 | static int elf_core_dump(int, const CPUState *); | |
edf8e2af | 1005 | #endif /* USE_ELF_CORE_DUMP */ |
682674b8 | 1006 | static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias); |
edf8e2af | 1007 | |
9058abdd RH |
1008 | /* Verify the portions of EHDR within E_IDENT for the target. |
1009 | This can be performed before bswapping the entire header. */ | |
1010 | static bool elf_check_ident(struct elfhdr *ehdr) | |
1011 | { | |
1012 | return (ehdr->e_ident[EI_MAG0] == ELFMAG0 | |
1013 | && ehdr->e_ident[EI_MAG1] == ELFMAG1 | |
1014 | && ehdr->e_ident[EI_MAG2] == ELFMAG2 | |
1015 | && ehdr->e_ident[EI_MAG3] == ELFMAG3 | |
1016 | && ehdr->e_ident[EI_CLASS] == ELF_CLASS | |
1017 | && ehdr->e_ident[EI_DATA] == ELF_DATA | |
1018 | && ehdr->e_ident[EI_VERSION] == EV_CURRENT); | |
1019 | } | |
1020 | ||
1021 | /* Verify the portions of EHDR outside of E_IDENT for the target. | |
1022 | This has to wait until after bswapping the header. */ | |
1023 | static bool elf_check_ehdr(struct elfhdr *ehdr) | |
1024 | { | |
1025 | return (elf_check_arch(ehdr->e_machine) | |
1026 | && ehdr->e_ehsize == sizeof(struct elfhdr) | |
1027 | && ehdr->e_phentsize == sizeof(struct elf_phdr) | |
1028 | && ehdr->e_shentsize == sizeof(struct elf_shdr) | |
1029 | && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN)); | |
1030 | } | |
1031 | ||
31e31b8a | 1032 | /* |
e5fe0c52 | 1033 | * 'copy_elf_strings()' copies argument/envelope strings from user |
31e31b8a FB |
1034 | * memory to free pages in kernel mem. These are in a format ready |
1035 | * to be put directly into the top of new user memory. | |
1036 | * | |
1037 | */ | |
992f48a0 BS |
1038 | static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
1039 | abi_ulong p) | |
31e31b8a FB |
1040 | { |
1041 | char *tmp, *tmp1, *pag = NULL; | |
1042 | int len, offset = 0; | |
1043 | ||
1044 | if (!p) { | |
d97ef72e | 1045 | return 0; /* bullet-proofing */ |
31e31b8a FB |
1046 | } |
1047 | while (argc-- > 0) { | |
edf779ff FB |
1048 | tmp = argv[argc]; |
1049 | if (!tmp) { | |
d97ef72e RH |
1050 | fprintf(stderr, "VFS: argc is wrong"); |
1051 | exit(-1); | |
1052 | } | |
edf779ff | 1053 | tmp1 = tmp; |
d97ef72e RH |
1054 | while (*tmp++); |
1055 | len = tmp - tmp1; | |
1056 | if (p < len) { /* this shouldn't happen - 128kB */ | |
1057 | return 0; | |
1058 | } | |
1059 | while (len) { | |
1060 | --p; --tmp; --len; | |
1061 | if (--offset < 0) { | |
1062 | offset = p % TARGET_PAGE_SIZE; | |
53a5960a | 1063 | pag = (char *)page[p/TARGET_PAGE_SIZE]; |
44a91cae | 1064 | if (!pag) { |
53a5960a | 1065 | pag = (char *)malloc(TARGET_PAGE_SIZE); |
4118a970 | 1066 | memset(pag, 0, TARGET_PAGE_SIZE); |
53a5960a | 1067 | page[p/TARGET_PAGE_SIZE] = pag; |
44a91cae FB |
1068 | if (!pag) |
1069 | return 0; | |
d97ef72e RH |
1070 | } |
1071 | } | |
1072 | if (len == 0 || offset == 0) { | |
1073 | *(pag + offset) = *tmp; | |
1074 | } | |
1075 | else { | |
1076 | int bytes_to_copy = (len > offset) ? offset : len; | |
1077 | tmp -= bytes_to_copy; | |
1078 | p -= bytes_to_copy; | |
1079 | offset -= bytes_to_copy; | |
1080 | len -= bytes_to_copy; | |
1081 | memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1); | |
1082 | } | |
1083 | } | |
31e31b8a FB |
1084 | } |
1085 | return p; | |
1086 | } | |
1087 | ||
992f48a0 BS |
1088 | static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
1089 | struct image_info *info) | |
53a5960a | 1090 | { |
60dcbcb5 | 1091 | abi_ulong stack_base, size, error, guard; |
31e31b8a | 1092 | int i; |
31e31b8a | 1093 | |
09bfb054 | 1094 | /* Create enough stack to hold everything. If we don't use |
60dcbcb5 | 1095 | it for args, we'll use it for something else. */ |
703e0e89 | 1096 | size = guest_stack_size; |
60dcbcb5 | 1097 | if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) { |
54936004 | 1098 | size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
60dcbcb5 RH |
1099 | } |
1100 | guard = TARGET_PAGE_SIZE; | |
1101 | if (guard < qemu_real_host_page_size) { | |
1102 | guard = qemu_real_host_page_size; | |
1103 | } | |
1104 | ||
1105 | error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE, | |
1106 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
09bfb054 | 1107 | if (error == -1) { |
60dcbcb5 | 1108 | perror("mmap stack"); |
09bfb054 FB |
1109 | exit(-1); |
1110 | } | |
31e31b8a | 1111 | |
60dcbcb5 RH |
1112 | /* We reserve one extra page at the top of the stack as guard. */ |
1113 | target_mprotect(error, guard, PROT_NONE); | |
1114 | ||
1115 | info->stack_limit = error + guard; | |
1116 | stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; | |
31e31b8a | 1117 | p += stack_base; |
09bfb054 | 1118 | |
31e31b8a | 1119 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
d97ef72e RH |
1120 | if (bprm->page[i]) { |
1121 | info->rss++; | |
579a97f7 | 1122 | /* FIXME - check return value of memcpy_to_target() for failure */ |
d97ef72e RH |
1123 | memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
1124 | free(bprm->page[i]); | |
1125 | } | |
53a5960a | 1126 | stack_base += TARGET_PAGE_SIZE; |
31e31b8a FB |
1127 | } |
1128 | return p; | |
1129 | } | |
1130 | ||
cf129f3a RH |
1131 | /* Map and zero the bss. We need to explicitly zero any fractional pages |
1132 | after the data section (i.e. bss). */ | |
1133 | static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) | |
31e31b8a | 1134 | { |
cf129f3a RH |
1135 | uintptr_t host_start, host_map_start, host_end; |
1136 | ||
1137 | last_bss = TARGET_PAGE_ALIGN(last_bss); | |
1138 | ||
1139 | /* ??? There is confusion between qemu_real_host_page_size and | |
1140 | qemu_host_page_size here and elsewhere in target_mmap, which | |
1141 | may lead to the end of the data section mapping from the file | |
1142 | not being mapped. At least there was an explicit test and | |
1143 | comment for that here, suggesting that "the file size must | |
1144 | be known". The comment probably pre-dates the introduction | |
1145 | of the fstat system call in target_mmap which does in fact | |
1146 | find out the size. What isn't clear is if the workaround | |
1147 | here is still actually needed. For now, continue with it, | |
1148 | but merge it with the "normal" mmap that would allocate the bss. */ | |
1149 | ||
1150 | host_start = (uintptr_t) g2h(elf_bss); | |
1151 | host_end = (uintptr_t) g2h(last_bss); | |
1152 | host_map_start = (host_start + qemu_real_host_page_size - 1); | |
1153 | host_map_start &= -qemu_real_host_page_size; | |
1154 | ||
1155 | if (host_map_start < host_end) { | |
1156 | void *p = mmap((void *)host_map_start, host_end - host_map_start, | |
1157 | prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
1158 | if (p == MAP_FAILED) { | |
1159 | perror("cannot mmap brk"); | |
1160 | exit(-1); | |
853d6f7a FB |
1161 | } |
1162 | ||
cf129f3a RH |
1163 | /* Since we didn't use target_mmap, make sure to record |
1164 | the validity of the pages with qemu. */ | |
1165 | page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID); | |
1166 | } | |
31e31b8a | 1167 | |
cf129f3a RH |
1168 | if (host_start < host_map_start) { |
1169 | memset((void *)host_start, 0, host_map_start - host_start); | |
1170 | } | |
1171 | } | |
53a5960a | 1172 | |
1af02e83 MF |
1173 | #ifdef CONFIG_USE_FDPIC |
1174 | static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp) | |
1175 | { | |
1176 | uint16_t n; | |
1177 | struct elf32_fdpic_loadseg *loadsegs = info->loadsegs; | |
1178 | ||
1179 | /* elf32_fdpic_loadseg */ | |
1180 | n = info->nsegs; | |
1181 | while (n--) { | |
1182 | sp -= 12; | |
1183 | put_user_u32(loadsegs[n].addr, sp+0); | |
1184 | put_user_u32(loadsegs[n].p_vaddr, sp+4); | |
1185 | put_user_u32(loadsegs[n].p_memsz, sp+8); | |
1186 | } | |
1187 | ||
1188 | /* elf32_fdpic_loadmap */ | |
1189 | sp -= 4; | |
1190 | put_user_u16(0, sp+0); /* version */ | |
1191 | put_user_u16(info->nsegs, sp+2); /* nsegs */ | |
1192 | ||
1193 | info->personality = PER_LINUX_FDPIC; | |
1194 | info->loadmap_addr = sp; | |
1195 | ||
1196 | return sp; | |
1197 | } | |
1198 | #endif | |
1199 | ||
992f48a0 | 1200 | static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
8e62a717 RH |
1201 | struct elfhdr *exec, |
1202 | struct image_info *info, | |
1203 | struct image_info *interp_info) | |
31e31b8a | 1204 | { |
d97ef72e RH |
1205 | abi_ulong sp; |
1206 | int size; | |
14322bad LA |
1207 | int i; |
1208 | abi_ulong u_rand_bytes; | |
1209 | uint8_t k_rand_bytes[16]; | |
d97ef72e RH |
1210 | abi_ulong u_platform; |
1211 | const char *k_platform; | |
1212 | const int n = sizeof(elf_addr_t); | |
1213 | ||
1214 | sp = p; | |
1af02e83 MF |
1215 | |
1216 | #ifdef CONFIG_USE_FDPIC | |
1217 | /* Needs to be before we load the env/argc/... */ | |
1218 | if (elf_is_fdpic(exec)) { | |
1219 | /* Need 4 byte alignment for these structs */ | |
1220 | sp &= ~3; | |
1221 | sp = loader_build_fdpic_loadmap(info, sp); | |
1222 | info->other_info = interp_info; | |
1223 | if (interp_info) { | |
1224 | interp_info->other_info = info; | |
1225 | sp = loader_build_fdpic_loadmap(interp_info, sp); | |
1226 | } | |
1227 | } | |
1228 | #endif | |
1229 | ||
d97ef72e RH |
1230 | u_platform = 0; |
1231 | k_platform = ELF_PLATFORM; | |
1232 | if (k_platform) { | |
1233 | size_t len = strlen(k_platform) + 1; | |
1234 | sp -= (len + n - 1) & ~(n - 1); | |
1235 | u_platform = sp; | |
1236 | /* FIXME - check return value of memcpy_to_target() for failure */ | |
1237 | memcpy_to_target(sp, k_platform, len); | |
1238 | } | |
14322bad LA |
1239 | |
1240 | /* | |
1241 | * Generate 16 random bytes for userspace PRNG seeding (not | |
1242 | * cryptically secure but it's not the aim of QEMU). | |
1243 | */ | |
1244 | srand((unsigned int) time(NULL)); | |
1245 | for (i = 0; i < 16; i++) { | |
1246 | k_rand_bytes[i] = rand(); | |
1247 | } | |
1248 | sp -= 16; | |
1249 | u_rand_bytes = sp; | |
1250 | /* FIXME - check return value of memcpy_to_target() for failure */ | |
1251 | memcpy_to_target(sp, k_rand_bytes, 16); | |
1252 | ||
d97ef72e RH |
1253 | /* |
1254 | * Force 16 byte _final_ alignment here for generality. | |
1255 | */ | |
1256 | sp = sp &~ (abi_ulong)15; | |
1257 | size = (DLINFO_ITEMS + 1) * 2; | |
1258 | if (k_platform) | |
1259 | size += 2; | |
f5155289 | 1260 | #ifdef DLINFO_ARCH_ITEMS |
d97ef72e | 1261 | size += DLINFO_ARCH_ITEMS * 2; |
f5155289 | 1262 | #endif |
d97ef72e | 1263 | size += envc + argc + 2; |
b9329d4b | 1264 | size += 1; /* argc itself */ |
d97ef72e RH |
1265 | size *= n; |
1266 | if (size & 15) | |
1267 | sp -= 16 - (size & 15); | |
1268 | ||
1269 | /* This is correct because Linux defines | |
1270 | * elf_addr_t as Elf32_Off / Elf64_Off | |
1271 | */ | |
1272 | #define NEW_AUX_ENT(id, val) do { \ | |
1273 | sp -= n; put_user_ual(val, sp); \ | |
1274 | sp -= n; put_user_ual(id, sp); \ | |
1275 | } while(0) | |
1276 | ||
1277 | NEW_AUX_ENT (AT_NULL, 0); | |
1278 | ||
1279 | /* There must be exactly DLINFO_ITEMS entries here. */ | |
8e62a717 | 1280 | NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff)); |
d97ef72e RH |
1281 | NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); |
1282 | NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); | |
1283 | NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); | |
8e62a717 | 1284 | NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0)); |
d97ef72e | 1285 | NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); |
8e62a717 | 1286 | NEW_AUX_ENT(AT_ENTRY, info->entry); |
d97ef72e RH |
1287 | NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
1288 | NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); | |
1289 | NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); | |
1290 | NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); | |
1291 | NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); | |
1292 | NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); | |
14322bad LA |
1293 | NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes); |
1294 | ||
d97ef72e RH |
1295 | if (k_platform) |
1296 | NEW_AUX_ENT(AT_PLATFORM, u_platform); | |
f5155289 | 1297 | #ifdef ARCH_DLINFO |
d97ef72e RH |
1298 | /* |
1299 | * ARCH_DLINFO must come last so platform specific code can enforce | |
1300 | * special alignment requirements on the AUXV if necessary (eg. PPC). | |
1301 | */ | |
1302 | ARCH_DLINFO; | |
f5155289 FB |
1303 | #endif |
1304 | #undef NEW_AUX_ENT | |
1305 | ||
d97ef72e | 1306 | info->saved_auxv = sp; |
edf8e2af | 1307 | |
b9329d4b | 1308 | sp = loader_build_argptr(envc, argc, sp, p, 0); |
d97ef72e | 1309 | return sp; |
31e31b8a FB |
1310 | } |
1311 | ||
f3ed1f5d PM |
1312 | static void probe_guest_base(const char *image_name, |
1313 | abi_ulong loaddr, abi_ulong hiaddr) | |
1314 | { | |
1315 | /* Probe for a suitable guest base address, if the user has not set | |
1316 | * it explicitly, and set guest_base appropriately. | |
1317 | * In case of error we will print a suitable message and exit. | |
1318 | */ | |
1319 | #if defined(CONFIG_USE_GUEST_BASE) | |
1320 | const char *errmsg; | |
1321 | if (!have_guest_base && !reserved_va) { | |
1322 | unsigned long host_start, real_start, host_size; | |
1323 | ||
1324 | /* Round addresses to page boundaries. */ | |
1325 | loaddr &= qemu_host_page_mask; | |
1326 | hiaddr = HOST_PAGE_ALIGN(hiaddr); | |
1327 | ||
1328 | if (loaddr < mmap_min_addr) { | |
1329 | host_start = HOST_PAGE_ALIGN(mmap_min_addr); | |
1330 | } else { | |
1331 | host_start = loaddr; | |
1332 | if (host_start != loaddr) { | |
1333 | errmsg = "Address overflow loading ELF binary"; | |
1334 | goto exit_errmsg; | |
1335 | } | |
1336 | } | |
1337 | host_size = hiaddr - loaddr; | |
1338 | while (1) { | |
1339 | /* Do not use mmap_find_vma here because that is limited to the | |
1340 | guest address space. We are going to make the | |
1341 | guest address space fit whatever we're given. */ | |
1342 | real_start = (unsigned long) | |
1343 | mmap((void *)host_start, host_size, PROT_NONE, | |
1344 | MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0); | |
1345 | if (real_start == (unsigned long)-1) { | |
1346 | goto exit_perror; | |
1347 | } | |
1348 | if (real_start == host_start) { | |
1349 | break; | |
1350 | } | |
1351 | /* That address didn't work. Unmap and try a different one. | |
1352 | The address the host picked because is typically right at | |
1353 | the top of the host address space and leaves the guest with | |
1354 | no usable address space. Resort to a linear search. We | |
1355 | already compensated for mmap_min_addr, so this should not | |
1356 | happen often. Probably means we got unlucky and host | |
1357 | address space randomization put a shared library somewhere | |
1358 | inconvenient. */ | |
1359 | munmap((void *)real_start, host_size); | |
1360 | host_start += qemu_host_page_size; | |
1361 | if (host_start == loaddr) { | |
1362 | /* Theoretically possible if host doesn't have any suitably | |
1363 | aligned areas. Normally the first mmap will fail. */ | |
1364 | errmsg = "Unable to find space for application"; | |
1365 | goto exit_errmsg; | |
1366 | } | |
1367 | } | |
1368 | qemu_log("Relocating guest address space from 0x" | |
1369 | TARGET_ABI_FMT_lx " to 0x%lx\n", | |
1370 | loaddr, real_start); | |
1371 | guest_base = real_start - loaddr; | |
1372 | } | |
1373 | return; | |
1374 | ||
1375 | exit_perror: | |
1376 | errmsg = strerror(errno); | |
1377 | exit_errmsg: | |
1378 | fprintf(stderr, "%s: %s\n", image_name, errmsg); | |
1379 | exit(-1); | |
1380 | #endif | |
1381 | } | |
1382 | ||
1383 | ||
8e62a717 | 1384 | /* Load an ELF image into the address space. |
31e31b8a | 1385 | |
8e62a717 RH |
1386 | IMAGE_NAME is the filename of the image, to use in error messages. |
1387 | IMAGE_FD is the open file descriptor for the image. | |
1388 | ||
1389 | BPRM_BUF is a copy of the beginning of the file; this of course | |
1390 | contains the elf file header at offset 0. It is assumed that this | |
1391 | buffer is sufficiently aligned to present no problems to the host | |
1392 | in accessing data at aligned offsets within the buffer. | |
1393 | ||
1394 | On return: INFO values will be filled in, as necessary or available. */ | |
1395 | ||
1396 | static void load_elf_image(const char *image_name, int image_fd, | |
bf858897 | 1397 | struct image_info *info, char **pinterp_name, |
8e62a717 | 1398 | char bprm_buf[BPRM_BUF_SIZE]) |
31e31b8a | 1399 | { |
8e62a717 RH |
1400 | struct elfhdr *ehdr = (struct elfhdr *)bprm_buf; |
1401 | struct elf_phdr *phdr; | |
1402 | abi_ulong load_addr, load_bias, loaddr, hiaddr, error; | |
1403 | int i, retval; | |
1404 | const char *errmsg; | |
5fafdf24 | 1405 | |
8e62a717 RH |
1406 | /* First of all, some simple consistency checks */ |
1407 | errmsg = "Invalid ELF image for this architecture"; | |
1408 | if (!elf_check_ident(ehdr)) { | |
1409 | goto exit_errmsg; | |
1410 | } | |
1411 | bswap_ehdr(ehdr); | |
1412 | if (!elf_check_ehdr(ehdr)) { | |
1413 | goto exit_errmsg; | |
d97ef72e | 1414 | } |
5fafdf24 | 1415 | |
8e62a717 RH |
1416 | i = ehdr->e_phnum * sizeof(struct elf_phdr); |
1417 | if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) { | |
1418 | phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff); | |
9955ffac | 1419 | } else { |
8e62a717 RH |
1420 | phdr = (struct elf_phdr *) alloca(i); |
1421 | retval = pread(image_fd, phdr, i, ehdr->e_phoff); | |
9955ffac | 1422 | if (retval != i) { |
8e62a717 | 1423 | goto exit_read; |
9955ffac | 1424 | } |
d97ef72e | 1425 | } |
8e62a717 | 1426 | bswap_phdr(phdr, ehdr->e_phnum); |
09bfb054 | 1427 | |
1af02e83 MF |
1428 | #ifdef CONFIG_USE_FDPIC |
1429 | info->nsegs = 0; | |
1430 | info->pt_dynamic_addr = 0; | |
1431 | #endif | |
1432 | ||
682674b8 RH |
1433 | /* Find the maximum size of the image and allocate an appropriate |
1434 | amount of memory to handle that. */ | |
1435 | loaddr = -1, hiaddr = 0; | |
8e62a717 RH |
1436 | for (i = 0; i < ehdr->e_phnum; ++i) { |
1437 | if (phdr[i].p_type == PT_LOAD) { | |
1438 | abi_ulong a = phdr[i].p_vaddr; | |
682674b8 RH |
1439 | if (a < loaddr) { |
1440 | loaddr = a; | |
1441 | } | |
8e62a717 | 1442 | a += phdr[i].p_memsz; |
682674b8 RH |
1443 | if (a > hiaddr) { |
1444 | hiaddr = a; | |
1445 | } | |
1af02e83 MF |
1446 | #ifdef CONFIG_USE_FDPIC |
1447 | ++info->nsegs; | |
1448 | #endif | |
682674b8 RH |
1449 | } |
1450 | } | |
1451 | ||
1452 | load_addr = loaddr; | |
8e62a717 | 1453 | if (ehdr->e_type == ET_DYN) { |
682674b8 RH |
1454 | /* The image indicates that it can be loaded anywhere. Find a |
1455 | location that can hold the memory space required. If the | |
1456 | image is pre-linked, LOADDR will be non-zero. Since we do | |
1457 | not supply MAP_FIXED here we'll use that address if and | |
1458 | only if it remains available. */ | |
1459 | load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE, | |
1460 | MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, | |
1461 | -1, 0); | |
1462 | if (load_addr == -1) { | |
8e62a717 | 1463 | goto exit_perror; |
d97ef72e | 1464 | } |
bf858897 RH |
1465 | } else if (pinterp_name != NULL) { |
1466 | /* This is the main executable. Make sure that the low | |
1467 | address does not conflict with MMAP_MIN_ADDR or the | |
1468 | QEMU application itself. */ | |
f3ed1f5d | 1469 | probe_guest_base(image_name, loaddr, hiaddr); |
d97ef72e | 1470 | } |
682674b8 | 1471 | load_bias = load_addr - loaddr; |
d97ef72e | 1472 | |
1af02e83 MF |
1473 | #ifdef CONFIG_USE_FDPIC |
1474 | { | |
1475 | struct elf32_fdpic_loadseg *loadsegs = info->loadsegs = | |
1476 | qemu_malloc(sizeof(*loadsegs) * info->nsegs); | |
1477 | ||
1478 | for (i = 0; i < ehdr->e_phnum; ++i) { | |
1479 | switch (phdr[i].p_type) { | |
1480 | case PT_DYNAMIC: | |
1481 | info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias; | |
1482 | break; | |
1483 | case PT_LOAD: | |
1484 | loadsegs->addr = phdr[i].p_vaddr + load_bias; | |
1485 | loadsegs->p_vaddr = phdr[i].p_vaddr; | |
1486 | loadsegs->p_memsz = phdr[i].p_memsz; | |
1487 | ++loadsegs; | |
1488 | break; | |
1489 | } | |
1490 | } | |
1491 | } | |
1492 | #endif | |
1493 | ||
8e62a717 RH |
1494 | info->load_bias = load_bias; |
1495 | info->load_addr = load_addr; | |
1496 | info->entry = ehdr->e_entry + load_bias; | |
1497 | info->start_code = -1; | |
1498 | info->end_code = 0; | |
1499 | info->start_data = -1; | |
1500 | info->end_data = 0; | |
1501 | info->brk = 0; | |
1502 | ||
1503 | for (i = 0; i < ehdr->e_phnum; i++) { | |
1504 | struct elf_phdr *eppnt = phdr + i; | |
d97ef72e | 1505 | if (eppnt->p_type == PT_LOAD) { |
682674b8 | 1506 | abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em; |
d97ef72e | 1507 | int elf_prot = 0; |
d97ef72e RH |
1508 | |
1509 | if (eppnt->p_flags & PF_R) elf_prot = PROT_READ; | |
1510 | if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE; | |
1511 | if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC; | |
d97ef72e | 1512 | |
682674b8 RH |
1513 | vaddr = load_bias + eppnt->p_vaddr; |
1514 | vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr); | |
1515 | vaddr_ps = TARGET_ELF_PAGESTART(vaddr); | |
1516 | ||
1517 | error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po, | |
1518 | elf_prot, MAP_PRIVATE | MAP_FIXED, | |
8e62a717 | 1519 | image_fd, eppnt->p_offset - vaddr_po); |
09bfb054 | 1520 | if (error == -1) { |
8e62a717 | 1521 | goto exit_perror; |
09bfb054 | 1522 | } |
09bfb054 | 1523 | |
682674b8 RH |
1524 | vaddr_ef = vaddr + eppnt->p_filesz; |
1525 | vaddr_em = vaddr + eppnt->p_memsz; | |
31e31b8a | 1526 | |
cf129f3a | 1527 | /* If the load segment requests extra zeros (e.g. bss), map it. */ |
682674b8 RH |
1528 | if (vaddr_ef < vaddr_em) { |
1529 | zero_bss(vaddr_ef, vaddr_em, elf_prot); | |
cf129f3a | 1530 | } |
8e62a717 RH |
1531 | |
1532 | /* Find the full program boundaries. */ | |
1533 | if (elf_prot & PROT_EXEC) { | |
1534 | if (vaddr < info->start_code) { | |
1535 | info->start_code = vaddr; | |
1536 | } | |
1537 | if (vaddr_ef > info->end_code) { | |
1538 | info->end_code = vaddr_ef; | |
1539 | } | |
1540 | } | |
1541 | if (elf_prot & PROT_WRITE) { | |
1542 | if (vaddr < info->start_data) { | |
1543 | info->start_data = vaddr; | |
1544 | } | |
1545 | if (vaddr_ef > info->end_data) { | |
1546 | info->end_data = vaddr_ef; | |
1547 | } | |
1548 | if (vaddr_em > info->brk) { | |
1549 | info->brk = vaddr_em; | |
1550 | } | |
1551 | } | |
bf858897 RH |
1552 | } else if (eppnt->p_type == PT_INTERP && pinterp_name) { |
1553 | char *interp_name; | |
1554 | ||
1555 | if (*pinterp_name) { | |
1556 | errmsg = "Multiple PT_INTERP entries"; | |
1557 | goto exit_errmsg; | |
1558 | } | |
1559 | interp_name = malloc(eppnt->p_filesz); | |
1560 | if (!interp_name) { | |
1561 | goto exit_perror; | |
1562 | } | |
1563 | ||
1564 | if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { | |
1565 | memcpy(interp_name, bprm_buf + eppnt->p_offset, | |
1566 | eppnt->p_filesz); | |
1567 | } else { | |
1568 | retval = pread(image_fd, interp_name, eppnt->p_filesz, | |
1569 | eppnt->p_offset); | |
1570 | if (retval != eppnt->p_filesz) { | |
1571 | goto exit_perror; | |
1572 | } | |
1573 | } | |
1574 | if (interp_name[eppnt->p_filesz - 1] != 0) { | |
1575 | errmsg = "Invalid PT_INTERP entry"; | |
1576 | goto exit_errmsg; | |
1577 | } | |
1578 | *pinterp_name = interp_name; | |
d97ef72e | 1579 | } |
682674b8 | 1580 | } |
5fafdf24 | 1581 | |
8e62a717 RH |
1582 | if (info->end_data == 0) { |
1583 | info->start_data = info->end_code; | |
1584 | info->end_data = info->end_code; | |
1585 | info->brk = info->end_code; | |
1586 | } | |
1587 | ||
682674b8 | 1588 | if (qemu_log_enabled()) { |
8e62a717 | 1589 | load_symbols(ehdr, image_fd, load_bias); |
682674b8 | 1590 | } |
31e31b8a | 1591 | |
8e62a717 RH |
1592 | close(image_fd); |
1593 | return; | |
1594 | ||
1595 | exit_read: | |
1596 | if (retval >= 0) { | |
1597 | errmsg = "Incomplete read of file header"; | |
1598 | goto exit_errmsg; | |
1599 | } | |
1600 | exit_perror: | |
1601 | errmsg = strerror(errno); | |
1602 | exit_errmsg: | |
1603 | fprintf(stderr, "%s: %s\n", image_name, errmsg); | |
1604 | exit(-1); | |
1605 | } | |
1606 | ||
1607 | static void load_elf_interp(const char *filename, struct image_info *info, | |
1608 | char bprm_buf[BPRM_BUF_SIZE]) | |
1609 | { | |
1610 | int fd, retval; | |
1611 | ||
1612 | fd = open(path(filename), O_RDONLY); | |
1613 | if (fd < 0) { | |
1614 | goto exit_perror; | |
1615 | } | |
31e31b8a | 1616 | |
8e62a717 RH |
1617 | retval = read(fd, bprm_buf, BPRM_BUF_SIZE); |
1618 | if (retval < 0) { | |
1619 | goto exit_perror; | |
1620 | } | |
1621 | if (retval < BPRM_BUF_SIZE) { | |
1622 | memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval); | |
1623 | } | |
1624 | ||
bf858897 | 1625 | load_elf_image(filename, fd, info, NULL, bprm_buf); |
8e62a717 RH |
1626 | return; |
1627 | ||
1628 | exit_perror: | |
1629 | fprintf(stderr, "%s: %s\n", filename, strerror(errno)); | |
1630 | exit(-1); | |
31e31b8a FB |
1631 | } |
1632 | ||
49918a75 PB |
1633 | static int symfind(const void *s0, const void *s1) |
1634 | { | |
1635 | struct elf_sym *key = (struct elf_sym *)s0; | |
1636 | struct elf_sym *sym = (struct elf_sym *)s1; | |
1637 | int result = 0; | |
1638 | if (key->st_value < sym->st_value) { | |
1639 | result = -1; | |
ec822001 | 1640 | } else if (key->st_value >= sym->st_value + sym->st_size) { |
49918a75 PB |
1641 | result = 1; |
1642 | } | |
1643 | return result; | |
1644 | } | |
1645 | ||
1646 | static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) | |
1647 | { | |
1648 | #if ELF_CLASS == ELFCLASS32 | |
1649 | struct elf_sym *syms = s->disas_symtab.elf32; | |
1650 | #else | |
1651 | struct elf_sym *syms = s->disas_symtab.elf64; | |
1652 | #endif | |
1653 | ||
1654 | // binary search | |
1655 | struct elf_sym key; | |
1656 | struct elf_sym *sym; | |
1657 | ||
1658 | key.st_value = orig_addr; | |
1659 | ||
1660 | sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind); | |
7cba04f6 | 1661 | if (sym != NULL) { |
49918a75 PB |
1662 | return s->disas_strtab + sym->st_name; |
1663 | } | |
1664 | ||
1665 | return ""; | |
1666 | } | |
1667 | ||
1668 | /* FIXME: This should use elf_ops.h */ | |
1669 | static int symcmp(const void *s0, const void *s1) | |
1670 | { | |
1671 | struct elf_sym *sym0 = (struct elf_sym *)s0; | |
1672 | struct elf_sym *sym1 = (struct elf_sym *)s1; | |
1673 | return (sym0->st_value < sym1->st_value) | |
1674 | ? -1 | |
1675 | : ((sym0->st_value > sym1->st_value) ? 1 : 0); | |
1676 | } | |
1677 | ||
689f936f | 1678 | /* Best attempt to load symbols from this ELF object. */ |
682674b8 | 1679 | static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias) |
689f936f | 1680 | { |
682674b8 RH |
1681 | int i, shnum, nsyms, sym_idx = 0, str_idx = 0; |
1682 | struct elf_shdr *shdr; | |
b9475279 CV |
1683 | char *strings = NULL; |
1684 | struct syminfo *s = NULL; | |
1685 | struct elf_sym *new_syms, *syms = NULL; | |
689f936f | 1686 | |
682674b8 RH |
1687 | shnum = hdr->e_shnum; |
1688 | i = shnum * sizeof(struct elf_shdr); | |
1689 | shdr = (struct elf_shdr *)alloca(i); | |
1690 | if (pread(fd, shdr, i, hdr->e_shoff) != i) { | |
1691 | return; | |
1692 | } | |
1693 | ||
1694 | bswap_shdr(shdr, shnum); | |
1695 | for (i = 0; i < shnum; ++i) { | |
1696 | if (shdr[i].sh_type == SHT_SYMTAB) { | |
1697 | sym_idx = i; | |
1698 | str_idx = shdr[i].sh_link; | |
49918a75 PB |
1699 | goto found; |
1700 | } | |
689f936f | 1701 | } |
682674b8 RH |
1702 | |
1703 | /* There will be no symbol table if the file was stripped. */ | |
1704 | return; | |
689f936f FB |
1705 | |
1706 | found: | |
682674b8 | 1707 | /* Now know where the strtab and symtab are. Snarf them. */ |
e80cfcfc | 1708 | s = malloc(sizeof(*s)); |
682674b8 | 1709 | if (!s) { |
b9475279 | 1710 | goto give_up; |
682674b8 | 1711 | } |
5fafdf24 | 1712 | |
682674b8 RH |
1713 | i = shdr[str_idx].sh_size; |
1714 | s->disas_strtab = strings = malloc(i); | |
1715 | if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) { | |
b9475279 | 1716 | goto give_up; |
682674b8 | 1717 | } |
49918a75 | 1718 | |
682674b8 RH |
1719 | i = shdr[sym_idx].sh_size; |
1720 | syms = malloc(i); | |
1721 | if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) { | |
b9475279 | 1722 | goto give_up; |
682674b8 | 1723 | } |
31e31b8a | 1724 | |
682674b8 RH |
1725 | nsyms = i / sizeof(struct elf_sym); |
1726 | for (i = 0; i < nsyms; ) { | |
49918a75 | 1727 | bswap_sym(syms + i); |
682674b8 RH |
1728 | /* Throw away entries which we do not need. */ |
1729 | if (syms[i].st_shndx == SHN_UNDEF | |
1730 | || syms[i].st_shndx >= SHN_LORESERVE | |
1731 | || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { | |
1732 | if (i < --nsyms) { | |
49918a75 PB |
1733 | syms[i] = syms[nsyms]; |
1734 | } | |
682674b8 | 1735 | } else { |
49918a75 | 1736 | #if defined(TARGET_ARM) || defined (TARGET_MIPS) |
682674b8 RH |
1737 | /* The bottom address bit marks a Thumb or MIPS16 symbol. */ |
1738 | syms[i].st_value &= ~(target_ulong)1; | |
0774bed1 | 1739 | #endif |
682674b8 RH |
1740 | syms[i].st_value += load_bias; |
1741 | i++; | |
1742 | } | |
0774bed1 | 1743 | } |
49918a75 | 1744 | |
b9475279 CV |
1745 | /* No "useful" symbol. */ |
1746 | if (nsyms == 0) { | |
1747 | goto give_up; | |
1748 | } | |
1749 | ||
5d5c9930 RH |
1750 | /* Attempt to free the storage associated with the local symbols |
1751 | that we threw away. Whether or not this has any effect on the | |
1752 | memory allocation depends on the malloc implementation and how | |
1753 | many symbols we managed to discard. */ | |
8d79de6e SW |
1754 | new_syms = realloc(syms, nsyms * sizeof(*syms)); |
1755 | if (new_syms == NULL) { | |
b9475279 | 1756 | goto give_up; |
5d5c9930 | 1757 | } |
8d79de6e | 1758 | syms = new_syms; |
5d5c9930 | 1759 | |
49918a75 | 1760 | qsort(syms, nsyms, sizeof(*syms), symcmp); |
689f936f | 1761 | |
49918a75 PB |
1762 | s->disas_num_syms = nsyms; |
1763 | #if ELF_CLASS == ELFCLASS32 | |
1764 | s->disas_symtab.elf32 = syms; | |
49918a75 PB |
1765 | #else |
1766 | s->disas_symtab.elf64 = syms; | |
49918a75 | 1767 | #endif |
682674b8 | 1768 | s->lookup_symbol = lookup_symbolxx; |
e80cfcfc FB |
1769 | s->next = syminfos; |
1770 | syminfos = s; | |
b9475279 CV |
1771 | |
1772 | return; | |
1773 | ||
1774 | give_up: | |
1775 | free(s); | |
1776 | free(strings); | |
1777 | free(syms); | |
689f936f | 1778 | } |
31e31b8a | 1779 | |
e5fe0c52 PB |
1780 | int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1781 | struct image_info * info) | |
31e31b8a | 1782 | { |
8e62a717 | 1783 | struct image_info interp_info; |
31e31b8a | 1784 | struct elfhdr elf_ex; |
8e62a717 | 1785 | char *elf_interpreter = NULL; |
31e31b8a | 1786 | |
bf858897 RH |
1787 | info->start_mmap = (abi_ulong)ELF_START_MMAP; |
1788 | info->mmap = 0; | |
1789 | info->rss = 0; | |
1790 | ||
1791 | load_elf_image(bprm->filename, bprm->fd, info, | |
1792 | &elf_interpreter, bprm->buf); | |
31e31b8a | 1793 | |
bf858897 RH |
1794 | /* ??? We need a copy of the elf header for passing to create_elf_tables. |
1795 | If we do nothing, we'll have overwritten this when we re-use bprm->buf | |
1796 | when we load the interpreter. */ | |
1797 | elf_ex = *(struct elfhdr *)bprm->buf; | |
31e31b8a | 1798 | |
e5fe0c52 PB |
1799 | bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p); |
1800 | bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); | |
1801 | bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); | |
1802 | if (!bprm->p) { | |
bf858897 RH |
1803 | fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG)); |
1804 | exit(-1); | |
379f6698 | 1805 | } |
379f6698 | 1806 | |
31e31b8a FB |
1807 | /* Do this so that we can load the interpreter, if need be. We will |
1808 | change some of these later */ | |
31e31b8a | 1809 | bprm->p = setup_arg_pages(bprm->p, bprm, info); |
31e31b8a | 1810 | |
8e62a717 RH |
1811 | if (elf_interpreter) { |
1812 | load_elf_interp(elf_interpreter, &interp_info, bprm->buf); | |
31e31b8a | 1813 | |
8e62a717 RH |
1814 | /* If the program interpreter is one of these two, then assume |
1815 | an iBCS2 image. Otherwise assume a native linux image. */ | |
1816 | ||
1817 | if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0 | |
1818 | || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) { | |
1819 | info->personality = PER_SVR4; | |
31e31b8a | 1820 | |
8e62a717 RH |
1821 | /* Why this, you ask??? Well SVr4 maps page 0 as read-only, |
1822 | and some applications "depend" upon this behavior. Since | |
1823 | we do not have the power to recompile these, we emulate | |
1824 | the SVr4 behavior. Sigh. */ | |
1825 | target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, | |
1826 | MAP_FIXED | MAP_PRIVATE, -1, 0); | |
1827 | } | |
31e31b8a FB |
1828 | } |
1829 | ||
8e62a717 RH |
1830 | bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex, |
1831 | info, (elf_interpreter ? &interp_info : NULL)); | |
1832 | info->start_stack = bprm->p; | |
1833 | ||
1834 | /* If we have an interpreter, set that as the program's entry point. | |
1835 | Copy the load_addr as well, to help PPC64 interpret the entry | |
1836 | point as a function descriptor. Do this after creating elf tables | |
1837 | so that we copy the original program entry point into the AUXV. */ | |
1838 | if (elf_interpreter) { | |
1839 | info->load_addr = interp_info.load_addr; | |
1840 | info->entry = interp_info.entry; | |
bf858897 | 1841 | free(elf_interpreter); |
8e62a717 | 1842 | } |
31e31b8a | 1843 | |
edf8e2af MW |
1844 | #ifdef USE_ELF_CORE_DUMP |
1845 | bprm->core_dump = &elf_core_dump; | |
1846 | #endif | |
1847 | ||
31e31b8a FB |
1848 | return 0; |
1849 | } | |
1850 | ||
edf8e2af | 1851 | #ifdef USE_ELF_CORE_DUMP |
edf8e2af MW |
1852 | /* |
1853 | * Definitions to generate Intel SVR4-like core files. | |
a2547a13 | 1854 | * These mostly have the same names as the SVR4 types with "target_elf_" |
edf8e2af MW |
1855 | * tacked on the front to prevent clashes with linux definitions, |
1856 | * and the typedef forms have been avoided. This is mostly like | |
1857 | * the SVR4 structure, but more Linuxy, with things that Linux does | |
1858 | * not support and which gdb doesn't really use excluded. | |
1859 | * | |
1860 | * Fields we don't dump (their contents is zero) in linux-user qemu | |
1861 | * are marked with XXX. | |
1862 | * | |
1863 | * Core dump code is copied from linux kernel (fs/binfmt_elf.c). | |
1864 | * | |
1865 | * Porting ELF coredump for target is (quite) simple process. First you | |
dd0a3651 | 1866 | * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for |
edf8e2af MW |
1867 | * the target resides): |
1868 | * | |
1869 | * #define USE_ELF_CORE_DUMP | |
1870 | * | |
1871 | * Next you define type of register set used for dumping. ELF specification | |
1872 | * says that it needs to be array of elf_greg_t that has size of ELF_NREG. | |
1873 | * | |
c227f099 | 1874 | * typedef <target_regtype> target_elf_greg_t; |
edf8e2af | 1875 | * #define ELF_NREG <number of registers> |
c227f099 | 1876 | * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG]; |
edf8e2af | 1877 | * |
edf8e2af MW |
1878 | * Last step is to implement target specific function that copies registers |
1879 | * from given cpu into just specified register set. Prototype is: | |
1880 | * | |
c227f099 | 1881 | * static void elf_core_copy_regs(taret_elf_gregset_t *regs, |
a2547a13 | 1882 | * const CPUState *env); |
edf8e2af MW |
1883 | * |
1884 | * Parameters: | |
1885 | * regs - copy register values into here (allocated and zeroed by caller) | |
1886 | * env - copy registers from here | |
1887 | * | |
1888 | * Example for ARM target is provided in this file. | |
1889 | */ | |
1890 | ||
1891 | /* An ELF note in memory */ | |
1892 | struct memelfnote { | |
1893 | const char *name; | |
1894 | size_t namesz; | |
1895 | size_t namesz_rounded; | |
1896 | int type; | |
1897 | size_t datasz; | |
80f5ce75 | 1898 | size_t datasz_rounded; |
edf8e2af MW |
1899 | void *data; |
1900 | size_t notesz; | |
1901 | }; | |
1902 | ||
a2547a13 | 1903 | struct target_elf_siginfo { |
80f5ce75 LV |
1904 | target_int si_signo; /* signal number */ |
1905 | target_int si_code; /* extra code */ | |
1906 | target_int si_errno; /* errno */ | |
edf8e2af MW |
1907 | }; |
1908 | ||
a2547a13 LD |
1909 | struct target_elf_prstatus { |
1910 | struct target_elf_siginfo pr_info; /* Info associated with signal */ | |
80f5ce75 | 1911 | target_short pr_cursig; /* Current signal */ |
edf8e2af MW |
1912 | target_ulong pr_sigpend; /* XXX */ |
1913 | target_ulong pr_sighold; /* XXX */ | |
c227f099 AL |
1914 | target_pid_t pr_pid; |
1915 | target_pid_t pr_ppid; | |
1916 | target_pid_t pr_pgrp; | |
1917 | target_pid_t pr_sid; | |
edf8e2af MW |
1918 | struct target_timeval pr_utime; /* XXX User time */ |
1919 | struct target_timeval pr_stime; /* XXX System time */ | |
1920 | struct target_timeval pr_cutime; /* XXX Cumulative user time */ | |
1921 | struct target_timeval pr_cstime; /* XXX Cumulative system time */ | |
c227f099 | 1922 | target_elf_gregset_t pr_reg; /* GP registers */ |
80f5ce75 | 1923 | target_int pr_fpvalid; /* XXX */ |
edf8e2af MW |
1924 | }; |
1925 | ||
1926 | #define ELF_PRARGSZ (80) /* Number of chars for args */ | |
1927 | ||
a2547a13 | 1928 | struct target_elf_prpsinfo { |
edf8e2af MW |
1929 | char pr_state; /* numeric process state */ |
1930 | char pr_sname; /* char for pr_state */ | |
1931 | char pr_zomb; /* zombie */ | |
1932 | char pr_nice; /* nice val */ | |
1933 | target_ulong pr_flag; /* flags */ | |
c227f099 AL |
1934 | target_uid_t pr_uid; |
1935 | target_gid_t pr_gid; | |
1936 | target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; | |
edf8e2af MW |
1937 | /* Lots missing */ |
1938 | char pr_fname[16]; /* filename of executable */ | |
1939 | char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ | |
1940 | }; | |
1941 | ||
1942 | /* Here is the structure in which status of each thread is captured. */ | |
1943 | struct elf_thread_status { | |
72cf2d4f | 1944 | QTAILQ_ENTRY(elf_thread_status) ets_link; |
a2547a13 | 1945 | struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ |
edf8e2af MW |
1946 | #if 0 |
1947 | elf_fpregset_t fpu; /* NT_PRFPREG */ | |
1948 | struct task_struct *thread; | |
1949 | elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ | |
1950 | #endif | |
1951 | struct memelfnote notes[1]; | |
1952 | int num_notes; | |
1953 | }; | |
1954 | ||
1955 | struct elf_note_info { | |
1956 | struct memelfnote *notes; | |
a2547a13 LD |
1957 | struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ |
1958 | struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ | |
edf8e2af | 1959 | |
72cf2d4f | 1960 | QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; |
edf8e2af MW |
1961 | #if 0 |
1962 | /* | |
1963 | * Current version of ELF coredump doesn't support | |
1964 | * dumping fp regs etc. | |
1965 | */ | |
1966 | elf_fpregset_t *fpu; | |
1967 | elf_fpxregset_t *xfpu; | |
1968 | int thread_status_size; | |
1969 | #endif | |
1970 | int notes_size; | |
1971 | int numnote; | |
1972 | }; | |
1973 | ||
1974 | struct vm_area_struct { | |
1975 | abi_ulong vma_start; /* start vaddr of memory region */ | |
1976 | abi_ulong vma_end; /* end vaddr of memory region */ | |
1977 | abi_ulong vma_flags; /* protection etc. flags for the region */ | |
72cf2d4f | 1978 | QTAILQ_ENTRY(vm_area_struct) vma_link; |
edf8e2af MW |
1979 | }; |
1980 | ||
1981 | struct mm_struct { | |
72cf2d4f | 1982 | QTAILQ_HEAD(, vm_area_struct) mm_mmap; |
edf8e2af MW |
1983 | int mm_count; /* number of mappings */ |
1984 | }; | |
1985 | ||
1986 | static struct mm_struct *vma_init(void); | |
1987 | static void vma_delete(struct mm_struct *); | |
1988 | static int vma_add_mapping(struct mm_struct *, abi_ulong, | |
d97ef72e | 1989 | abi_ulong, abi_ulong); |
edf8e2af MW |
1990 | static int vma_get_mapping_count(const struct mm_struct *); |
1991 | static struct vm_area_struct *vma_first(const struct mm_struct *); | |
1992 | static struct vm_area_struct *vma_next(struct vm_area_struct *); | |
1993 | static abi_ulong vma_dump_size(const struct vm_area_struct *); | |
b480d9b7 | 1994 | static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
d97ef72e | 1995 | unsigned long flags); |
edf8e2af MW |
1996 | |
1997 | static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); | |
1998 | static void fill_note(struct memelfnote *, const char *, int, | |
d97ef72e | 1999 | unsigned int, void *); |
a2547a13 LD |
2000 | static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); |
2001 | static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); | |
edf8e2af MW |
2002 | static void fill_auxv_note(struct memelfnote *, const TaskState *); |
2003 | static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); | |
2004 | static size_t note_size(const struct memelfnote *); | |
2005 | static void free_note_info(struct elf_note_info *); | |
2006 | static int fill_note_info(struct elf_note_info *, long, const CPUState *); | |
2007 | static void fill_thread_info(struct elf_note_info *, const CPUState *); | |
2008 | static int core_dump_filename(const TaskState *, char *, size_t); | |
2009 | ||
2010 | static int dump_write(int, const void *, size_t); | |
2011 | static int write_note(struct memelfnote *, int); | |
2012 | static int write_note_info(struct elf_note_info *, int); | |
2013 | ||
2014 | #ifdef BSWAP_NEEDED | |
a2547a13 | 2015 | static void bswap_prstatus(struct target_elf_prstatus *prstatus) |
edf8e2af MW |
2016 | { |
2017 | prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo); | |
2018 | prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code); | |
2019 | prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno); | |
2020 | prstatus->pr_cursig = tswap16(prstatus->pr_cursig); | |
2021 | prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend); | |
2022 | prstatus->pr_sighold = tswapl(prstatus->pr_sighold); | |
2023 | prstatus->pr_pid = tswap32(prstatus->pr_pid); | |
2024 | prstatus->pr_ppid = tswap32(prstatus->pr_ppid); | |
2025 | prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); | |
2026 | prstatus->pr_sid = tswap32(prstatus->pr_sid); | |
2027 | /* cpu times are not filled, so we skip them */ | |
2028 | /* regs should be in correct format already */ | |
2029 | prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); | |
2030 | } | |
2031 | ||
a2547a13 | 2032 | static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) |
edf8e2af MW |
2033 | { |
2034 | psinfo->pr_flag = tswapl(psinfo->pr_flag); | |
2035 | psinfo->pr_uid = tswap16(psinfo->pr_uid); | |
2036 | psinfo->pr_gid = tswap16(psinfo->pr_gid); | |
2037 | psinfo->pr_pid = tswap32(psinfo->pr_pid); | |
2038 | psinfo->pr_ppid = tswap32(psinfo->pr_ppid); | |
2039 | psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); | |
2040 | psinfo->pr_sid = tswap32(psinfo->pr_sid); | |
2041 | } | |
991f8f0c RH |
2042 | |
2043 | static void bswap_note(struct elf_note *en) | |
2044 | { | |
2045 | bswap32s(&en->n_namesz); | |
2046 | bswap32s(&en->n_descsz); | |
2047 | bswap32s(&en->n_type); | |
2048 | } | |
2049 | #else | |
2050 | static inline void bswap_prstatus(struct target_elf_prstatus *p) { } | |
2051 | static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {} | |
2052 | static inline void bswap_note(struct elf_note *en) { } | |
edf8e2af MW |
2053 | #endif /* BSWAP_NEEDED */ |
2054 | ||
2055 | /* | |
2056 | * Minimal support for linux memory regions. These are needed | |
2057 | * when we are finding out what memory exactly belongs to | |
2058 | * emulated process. No locks needed here, as long as | |
2059 | * thread that received the signal is stopped. | |
2060 | */ | |
2061 | ||
2062 | static struct mm_struct *vma_init(void) | |
2063 | { | |
2064 | struct mm_struct *mm; | |
2065 | ||
2066 | if ((mm = qemu_malloc(sizeof (*mm))) == NULL) | |
2067 | return (NULL); | |
2068 | ||
2069 | mm->mm_count = 0; | |
72cf2d4f | 2070 | QTAILQ_INIT(&mm->mm_mmap); |
edf8e2af MW |
2071 | |
2072 | return (mm); | |
2073 | } | |
2074 | ||
2075 | static void vma_delete(struct mm_struct *mm) | |
2076 | { | |
2077 | struct vm_area_struct *vma; | |
2078 | ||
2079 | while ((vma = vma_first(mm)) != NULL) { | |
72cf2d4f | 2080 | QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); |
edf8e2af MW |
2081 | qemu_free(vma); |
2082 | } | |
2083 | qemu_free(mm); | |
2084 | } | |
2085 | ||
2086 | static int vma_add_mapping(struct mm_struct *mm, abi_ulong start, | |
d97ef72e | 2087 | abi_ulong end, abi_ulong flags) |
edf8e2af MW |
2088 | { |
2089 | struct vm_area_struct *vma; | |
2090 | ||
2091 | if ((vma = qemu_mallocz(sizeof (*vma))) == NULL) | |
2092 | return (-1); | |
2093 | ||
2094 | vma->vma_start = start; | |
2095 | vma->vma_end = end; | |
2096 | vma->vma_flags = flags; | |
2097 | ||
72cf2d4f | 2098 | QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); |
edf8e2af MW |
2099 | mm->mm_count++; |
2100 | ||
2101 | return (0); | |
2102 | } | |
2103 | ||
2104 | static struct vm_area_struct *vma_first(const struct mm_struct *mm) | |
2105 | { | |
72cf2d4f | 2106 | return (QTAILQ_FIRST(&mm->mm_mmap)); |
edf8e2af MW |
2107 | } |
2108 | ||
2109 | static struct vm_area_struct *vma_next(struct vm_area_struct *vma) | |
2110 | { | |
72cf2d4f | 2111 | return (QTAILQ_NEXT(vma, vma_link)); |
edf8e2af MW |
2112 | } |
2113 | ||
2114 | static int vma_get_mapping_count(const struct mm_struct *mm) | |
2115 | { | |
2116 | return (mm->mm_count); | |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * Calculate file (dump) size of given memory region. | |
2121 | */ | |
2122 | static abi_ulong vma_dump_size(const struct vm_area_struct *vma) | |
2123 | { | |
2124 | /* if we cannot even read the first page, skip it */ | |
2125 | if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE)) | |
2126 | return (0); | |
2127 | ||
2128 | /* | |
2129 | * Usually we don't dump executable pages as they contain | |
2130 | * non-writable code that debugger can read directly from | |
2131 | * target library etc. However, thread stacks are marked | |
2132 | * also executable so we read in first page of given region | |
2133 | * and check whether it contains elf header. If there is | |
2134 | * no elf header, we dump it. | |
2135 | */ | |
2136 | if (vma->vma_flags & PROT_EXEC) { | |
2137 | char page[TARGET_PAGE_SIZE]; | |
2138 | ||
2139 | copy_from_user(page, vma->vma_start, sizeof (page)); | |
2140 | if ((page[EI_MAG0] == ELFMAG0) && | |
2141 | (page[EI_MAG1] == ELFMAG1) && | |
2142 | (page[EI_MAG2] == ELFMAG2) && | |
2143 | (page[EI_MAG3] == ELFMAG3)) { | |
2144 | /* | |
2145 | * Mappings are possibly from ELF binary. Don't dump | |
2146 | * them. | |
2147 | */ | |
2148 | return (0); | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | return (vma->vma_end - vma->vma_start); | |
2153 | } | |
2154 | ||
b480d9b7 | 2155 | static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
d97ef72e | 2156 | unsigned long flags) |
edf8e2af MW |
2157 | { |
2158 | struct mm_struct *mm = (struct mm_struct *)priv; | |
2159 | ||
edf8e2af MW |
2160 | vma_add_mapping(mm, start, end, flags); |
2161 | return (0); | |
2162 | } | |
2163 | ||
2164 | static void fill_note(struct memelfnote *note, const char *name, int type, | |
d97ef72e | 2165 | unsigned int sz, void *data) |
edf8e2af MW |
2166 | { |
2167 | unsigned int namesz; | |
2168 | ||
2169 | namesz = strlen(name) + 1; | |
2170 | note->name = name; | |
2171 | note->namesz = namesz; | |
2172 | note->namesz_rounded = roundup(namesz, sizeof (int32_t)); | |
2173 | note->type = type; | |
80f5ce75 LV |
2174 | note->datasz = sz; |
2175 | note->datasz_rounded = roundup(sz, sizeof (int32_t)); | |
2176 | ||
edf8e2af MW |
2177 | note->data = data; |
2178 | ||
2179 | /* | |
2180 | * We calculate rounded up note size here as specified by | |
2181 | * ELF document. | |
2182 | */ | |
2183 | note->notesz = sizeof (struct elf_note) + | |
80f5ce75 | 2184 | note->namesz_rounded + note->datasz_rounded; |
edf8e2af MW |
2185 | } |
2186 | ||
2187 | static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, | |
d97ef72e | 2188 | uint32_t flags) |
edf8e2af MW |
2189 | { |
2190 | (void) memset(elf, 0, sizeof(*elf)); | |
2191 | ||
2192 | (void) memcpy(elf->e_ident, ELFMAG, SELFMAG); | |
2193 | elf->e_ident[EI_CLASS] = ELF_CLASS; | |
2194 | elf->e_ident[EI_DATA] = ELF_DATA; | |
2195 | elf->e_ident[EI_VERSION] = EV_CURRENT; | |
2196 | elf->e_ident[EI_OSABI] = ELF_OSABI; | |
2197 | ||
2198 | elf->e_type = ET_CORE; | |
2199 | elf->e_machine = machine; | |
2200 | elf->e_version = EV_CURRENT; | |
2201 | elf->e_phoff = sizeof(struct elfhdr); | |
2202 | elf->e_flags = flags; | |
2203 | elf->e_ehsize = sizeof(struct elfhdr); | |
2204 | elf->e_phentsize = sizeof(struct elf_phdr); | |
2205 | elf->e_phnum = segs; | |
2206 | ||
edf8e2af | 2207 | bswap_ehdr(elf); |
edf8e2af MW |
2208 | } |
2209 | ||
2210 | static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) | |
2211 | { | |
2212 | phdr->p_type = PT_NOTE; | |
2213 | phdr->p_offset = offset; | |
2214 | phdr->p_vaddr = 0; | |
2215 | phdr->p_paddr = 0; | |
2216 | phdr->p_filesz = sz; | |
2217 | phdr->p_memsz = 0; | |
2218 | phdr->p_flags = 0; | |
2219 | phdr->p_align = 0; | |
2220 | ||
991f8f0c | 2221 | bswap_phdr(phdr, 1); |
edf8e2af MW |
2222 | } |
2223 | ||
2224 | static size_t note_size(const struct memelfnote *note) | |
2225 | { | |
2226 | return (note->notesz); | |
2227 | } | |
2228 | ||
a2547a13 | 2229 | static void fill_prstatus(struct target_elf_prstatus *prstatus, |
d97ef72e | 2230 | const TaskState *ts, int signr) |
edf8e2af MW |
2231 | { |
2232 | (void) memset(prstatus, 0, sizeof (*prstatus)); | |
2233 | prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; | |
2234 | prstatus->pr_pid = ts->ts_tid; | |
2235 | prstatus->pr_ppid = getppid(); | |
2236 | prstatus->pr_pgrp = getpgrp(); | |
2237 | prstatus->pr_sid = getsid(0); | |
2238 | ||
edf8e2af | 2239 | bswap_prstatus(prstatus); |
edf8e2af MW |
2240 | } |
2241 | ||
a2547a13 | 2242 | static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) |
edf8e2af MW |
2243 | { |
2244 | char *filename, *base_filename; | |
2245 | unsigned int i, len; | |
2246 | ||
2247 | (void) memset(psinfo, 0, sizeof (*psinfo)); | |
2248 | ||
2249 | len = ts->info->arg_end - ts->info->arg_start; | |
2250 | if (len >= ELF_PRARGSZ) | |
2251 | len = ELF_PRARGSZ - 1; | |
2252 | if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len)) | |
2253 | return -EFAULT; | |
2254 | for (i = 0; i < len; i++) | |
2255 | if (psinfo->pr_psargs[i] == 0) | |
2256 | psinfo->pr_psargs[i] = ' '; | |
2257 | psinfo->pr_psargs[len] = 0; | |
2258 | ||
2259 | psinfo->pr_pid = getpid(); | |
2260 | psinfo->pr_ppid = getppid(); | |
2261 | psinfo->pr_pgrp = getpgrp(); | |
2262 | psinfo->pr_sid = getsid(0); | |
2263 | psinfo->pr_uid = getuid(); | |
2264 | psinfo->pr_gid = getgid(); | |
2265 | ||
2266 | filename = strdup(ts->bprm->filename); | |
2267 | base_filename = strdup(basename(filename)); | |
2268 | (void) strncpy(psinfo->pr_fname, base_filename, | |
d97ef72e | 2269 | sizeof(psinfo->pr_fname)); |
edf8e2af MW |
2270 | free(base_filename); |
2271 | free(filename); | |
2272 | ||
edf8e2af | 2273 | bswap_psinfo(psinfo); |
edf8e2af MW |
2274 | return (0); |
2275 | } | |
2276 | ||
2277 | static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) | |
2278 | { | |
2279 | elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; | |
2280 | elf_addr_t orig_auxv = auxv; | |
2281 | abi_ulong val; | |
2282 | void *ptr; | |
2283 | int i, len; | |
2284 | ||
2285 | /* | |
2286 | * Auxiliary vector is stored in target process stack. It contains | |
2287 | * {type, value} pairs that we need to dump into note. This is not | |
2288 | * strictly necessary but we do it here for sake of completeness. | |
2289 | */ | |
2290 | ||
2291 | /* find out lenght of the vector, AT_NULL is terminator */ | |
2292 | i = len = 0; | |
2293 | do { | |
2294 | get_user_ual(val, auxv); | |
2295 | i += 2; | |
2296 | auxv += 2 * sizeof (elf_addr_t); | |
2297 | } while (val != AT_NULL); | |
2298 | len = i * sizeof (elf_addr_t); | |
2299 | ||
2300 | /* read in whole auxv vector and copy it to memelfnote */ | |
2301 | ptr = lock_user(VERIFY_READ, orig_auxv, len, 0); | |
2302 | if (ptr != NULL) { | |
2303 | fill_note(note, "CORE", NT_AUXV, len, ptr); | |
2304 | unlock_user(ptr, auxv, len); | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | * Constructs name of coredump file. We have following convention | |
2310 | * for the name: | |
2311 | * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core | |
2312 | * | |
2313 | * Returns 0 in case of success, -1 otherwise (errno is set). | |
2314 | */ | |
2315 | static int core_dump_filename(const TaskState *ts, char *buf, | |
d97ef72e | 2316 | size_t bufsize) |
edf8e2af MW |
2317 | { |
2318 | char timestamp[64]; | |
2319 | char *filename = NULL; | |
2320 | char *base_filename = NULL; | |
2321 | struct timeval tv; | |
2322 | struct tm tm; | |
2323 | ||
2324 | assert(bufsize >= PATH_MAX); | |
2325 | ||
2326 | if (gettimeofday(&tv, NULL) < 0) { | |
2327 | (void) fprintf(stderr, "unable to get current timestamp: %s", | |
d97ef72e | 2328 | strerror(errno)); |
edf8e2af MW |
2329 | return (-1); |
2330 | } | |
2331 | ||
2332 | filename = strdup(ts->bprm->filename); | |
2333 | base_filename = strdup(basename(filename)); | |
2334 | (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S", | |
d97ef72e | 2335 | localtime_r(&tv.tv_sec, &tm)); |
edf8e2af | 2336 | (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core", |
d97ef72e | 2337 | base_filename, timestamp, (int)getpid()); |
edf8e2af MW |
2338 | free(base_filename); |
2339 | free(filename); | |
2340 | ||
2341 | return (0); | |
2342 | } | |
2343 | ||
2344 | static int dump_write(int fd, const void *ptr, size_t size) | |
2345 | { | |
2346 | const char *bufp = (const char *)ptr; | |
2347 | ssize_t bytes_written, bytes_left; | |
2348 | struct rlimit dumpsize; | |
2349 | off_t pos; | |
2350 | ||
2351 | bytes_written = 0; | |
2352 | getrlimit(RLIMIT_CORE, &dumpsize); | |
2353 | if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { | |
2354 | if (errno == ESPIPE) { /* not a seekable stream */ | |
2355 | bytes_left = size; | |
2356 | } else { | |
2357 | return pos; | |
2358 | } | |
2359 | } else { | |
2360 | if (dumpsize.rlim_cur <= pos) { | |
2361 | return -1; | |
2362 | } else if (dumpsize.rlim_cur == RLIM_INFINITY) { | |
2363 | bytes_left = size; | |
2364 | } else { | |
2365 | size_t limit_left=dumpsize.rlim_cur - pos; | |
2366 | bytes_left = limit_left >= size ? size : limit_left ; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * In normal conditions, single write(2) should do but | |
2372 | * in case of socket etc. this mechanism is more portable. | |
2373 | */ | |
2374 | do { | |
2375 | bytes_written = write(fd, bufp, bytes_left); | |
2376 | if (bytes_written < 0) { | |
2377 | if (errno == EINTR) | |
2378 | continue; | |
2379 | return (-1); | |
2380 | } else if (bytes_written == 0) { /* eof */ | |
2381 | return (-1); | |
2382 | } | |
2383 | bufp += bytes_written; | |
2384 | bytes_left -= bytes_written; | |
2385 | } while (bytes_left > 0); | |
2386 | ||
2387 | return (0); | |
2388 | } | |
2389 | ||
2390 | static int write_note(struct memelfnote *men, int fd) | |
2391 | { | |
2392 | struct elf_note en; | |
2393 | ||
2394 | en.n_namesz = men->namesz; | |
2395 | en.n_type = men->type; | |
2396 | en.n_descsz = men->datasz; | |
2397 | ||
edf8e2af | 2398 | bswap_note(&en); |
edf8e2af MW |
2399 | |
2400 | if (dump_write(fd, &en, sizeof(en)) != 0) | |
2401 | return (-1); | |
2402 | if (dump_write(fd, men->name, men->namesz_rounded) != 0) | |
2403 | return (-1); | |
80f5ce75 | 2404 | if (dump_write(fd, men->data, men->datasz_rounded) != 0) |
edf8e2af MW |
2405 | return (-1); |
2406 | ||
2407 | return (0); | |
2408 | } | |
2409 | ||
2410 | static void fill_thread_info(struct elf_note_info *info, const CPUState *env) | |
2411 | { | |
2412 | TaskState *ts = (TaskState *)env->opaque; | |
2413 | struct elf_thread_status *ets; | |
2414 | ||
2415 | ets = qemu_mallocz(sizeof (*ets)); | |
2416 | ets->num_notes = 1; /* only prstatus is dumped */ | |
2417 | fill_prstatus(&ets->prstatus, ts, 0); | |
2418 | elf_core_copy_regs(&ets->prstatus.pr_reg, env); | |
2419 | fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), | |
d97ef72e | 2420 | &ets->prstatus); |
edf8e2af | 2421 | |
72cf2d4f | 2422 | QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); |
edf8e2af MW |
2423 | |
2424 | info->notes_size += note_size(&ets->notes[0]); | |
2425 | } | |
2426 | ||
2427 | static int fill_note_info(struct elf_note_info *info, | |
d97ef72e | 2428 | long signr, const CPUState *env) |
edf8e2af MW |
2429 | { |
2430 | #define NUMNOTES 3 | |
2431 | CPUState *cpu = NULL; | |
2432 | TaskState *ts = (TaskState *)env->opaque; | |
2433 | int i; | |
2434 | ||
2435 | (void) memset(info, 0, sizeof (*info)); | |
2436 | ||
72cf2d4f | 2437 | QTAILQ_INIT(&info->thread_list); |
edf8e2af MW |
2438 | |
2439 | info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote)); | |
2440 | if (info->notes == NULL) | |
2441 | return (-ENOMEM); | |
2442 | info->prstatus = qemu_mallocz(sizeof (*info->prstatus)); | |
2443 | if (info->prstatus == NULL) | |
2444 | return (-ENOMEM); | |
2445 | info->psinfo = qemu_mallocz(sizeof (*info->psinfo)); | |
2446 | if (info->prstatus == NULL) | |
2447 | return (-ENOMEM); | |
2448 | ||
2449 | /* | |
2450 | * First fill in status (and registers) of current thread | |
2451 | * including process info & aux vector. | |
2452 | */ | |
2453 | fill_prstatus(info->prstatus, ts, signr); | |
2454 | elf_core_copy_regs(&info->prstatus->pr_reg, env); | |
2455 | fill_note(&info->notes[0], "CORE", NT_PRSTATUS, | |
d97ef72e | 2456 | sizeof (*info->prstatus), info->prstatus); |
edf8e2af MW |
2457 | fill_psinfo(info->psinfo, ts); |
2458 | fill_note(&info->notes[1], "CORE", NT_PRPSINFO, | |
d97ef72e | 2459 | sizeof (*info->psinfo), info->psinfo); |
edf8e2af MW |
2460 | fill_auxv_note(&info->notes[2], ts); |
2461 | info->numnote = 3; | |
2462 | ||
2463 | info->notes_size = 0; | |
2464 | for (i = 0; i < info->numnote; i++) | |
2465 | info->notes_size += note_size(&info->notes[i]); | |
2466 | ||
2467 | /* read and fill status of all threads */ | |
2468 | cpu_list_lock(); | |
2469 | for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { | |
2470 | if (cpu == thread_env) | |
2471 | continue; | |
2472 | fill_thread_info(info, cpu); | |
2473 | } | |
2474 | cpu_list_unlock(); | |
2475 | ||
2476 | return (0); | |
2477 | } | |
2478 | ||
2479 | static void free_note_info(struct elf_note_info *info) | |
2480 | { | |
2481 | struct elf_thread_status *ets; | |
2482 | ||
72cf2d4f BS |
2483 | while (!QTAILQ_EMPTY(&info->thread_list)) { |
2484 | ets = QTAILQ_FIRST(&info->thread_list); | |
2485 | QTAILQ_REMOVE(&info->thread_list, ets, ets_link); | |
edf8e2af MW |
2486 | qemu_free(ets); |
2487 | } | |
2488 | ||
2489 | qemu_free(info->prstatus); | |
2490 | qemu_free(info->psinfo); | |
2491 | qemu_free(info->notes); | |
2492 | } | |
2493 | ||
2494 | static int write_note_info(struct elf_note_info *info, int fd) | |
2495 | { | |
2496 | struct elf_thread_status *ets; | |
2497 | int i, error = 0; | |
2498 | ||
2499 | /* write prstatus, psinfo and auxv for current thread */ | |
2500 | for (i = 0; i < info->numnote; i++) | |
2501 | if ((error = write_note(&info->notes[i], fd)) != 0) | |
2502 | return (error); | |
2503 | ||
2504 | /* write prstatus for each thread */ | |
2505 | for (ets = info->thread_list.tqh_first; ets != NULL; | |
d97ef72e | 2506 | ets = ets->ets_link.tqe_next) { |
edf8e2af MW |
2507 | if ((error = write_note(&ets->notes[0], fd)) != 0) |
2508 | return (error); | |
2509 | } | |
2510 | ||
2511 | return (0); | |
2512 | } | |
2513 | ||
2514 | /* | |
2515 | * Write out ELF coredump. | |
2516 | * | |
2517 | * See documentation of ELF object file format in: | |
2518 | * http://www.caldera.com/developers/devspecs/gabi41.pdf | |
2519 | * | |
2520 | * Coredump format in linux is following: | |
2521 | * | |
2522 | * 0 +----------------------+ \ | |
2523 | * | ELF header | ET_CORE | | |
2524 | * +----------------------+ | | |
2525 | * | ELF program headers | |--- headers | |
2526 | * | - NOTE section | | | |
2527 | * | - PT_LOAD sections | | | |
2528 | * +----------------------+ / | |
2529 | * | NOTEs: | | |
2530 | * | - NT_PRSTATUS | | |
2531 | * | - NT_PRSINFO | | |
2532 | * | - NT_AUXV | | |
2533 | * +----------------------+ <-- aligned to target page | |
2534 | * | Process memory dump | | |
2535 | * : : | |
2536 | * . . | |
2537 | * : : | |
2538 | * | | | |
2539 | * +----------------------+ | |
2540 | * | |
2541 | * NT_PRSTATUS -> struct elf_prstatus (per thread) | |
2542 | * NT_PRSINFO -> struct elf_prpsinfo | |
2543 | * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()). | |
2544 | * | |
2545 | * Format follows System V format as close as possible. Current | |
2546 | * version limitations are as follows: | |
2547 | * - no floating point registers are dumped | |
2548 | * | |
2549 | * Function returns 0 in case of success, negative errno otherwise. | |
2550 | * | |
2551 | * TODO: make this work also during runtime: it should be | |
2552 | * possible to force coredump from running process and then | |
2553 | * continue processing. For example qemu could set up SIGUSR2 | |
2554 | * handler (provided that target process haven't registered | |
2555 | * handler for that) that does the dump when signal is received. | |
2556 | */ | |
2557 | static int elf_core_dump(int signr, const CPUState *env) | |
2558 | { | |
2559 | const TaskState *ts = (const TaskState *)env->opaque; | |
2560 | struct vm_area_struct *vma = NULL; | |
2561 | char corefile[PATH_MAX]; | |
2562 | struct elf_note_info info; | |
2563 | struct elfhdr elf; | |
2564 | struct elf_phdr phdr; | |
2565 | struct rlimit dumpsize; | |
2566 | struct mm_struct *mm = NULL; | |
2567 | off_t offset = 0, data_offset = 0; | |
2568 | int segs = 0; | |
2569 | int fd = -1; | |
2570 | ||
2571 | errno = 0; | |
2572 | getrlimit(RLIMIT_CORE, &dumpsize); | |
2573 | if (dumpsize.rlim_cur == 0) | |
d97ef72e | 2574 | return 0; |
edf8e2af MW |
2575 | |
2576 | if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0) | |
2577 | return (-errno); | |
2578 | ||
2579 | if ((fd = open(corefile, O_WRONLY | O_CREAT, | |
d97ef72e | 2580 | S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0) |
edf8e2af MW |
2581 | return (-errno); |
2582 | ||
2583 | /* | |
2584 | * Walk through target process memory mappings and | |
2585 | * set up structure containing this information. After | |
2586 | * this point vma_xxx functions can be used. | |
2587 | */ | |
2588 | if ((mm = vma_init()) == NULL) | |
2589 | goto out; | |
2590 | ||
2591 | walk_memory_regions(mm, vma_walker); | |
2592 | segs = vma_get_mapping_count(mm); | |
2593 | ||
2594 | /* | |
2595 | * Construct valid coredump ELF header. We also | |
2596 | * add one more segment for notes. | |
2597 | */ | |
2598 | fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); | |
2599 | if (dump_write(fd, &elf, sizeof (elf)) != 0) | |
2600 | goto out; | |
2601 | ||
2602 | /* fill in in-memory version of notes */ | |
2603 | if (fill_note_info(&info, signr, env) < 0) | |
2604 | goto out; | |
2605 | ||
2606 | offset += sizeof (elf); /* elf header */ | |
2607 | offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ | |
2608 | ||
2609 | /* write out notes program header */ | |
2610 | fill_elf_note_phdr(&phdr, info.notes_size, offset); | |
2611 | ||
2612 | offset += info.notes_size; | |
2613 | if (dump_write(fd, &phdr, sizeof (phdr)) != 0) | |
2614 | goto out; | |
2615 | ||
2616 | /* | |
2617 | * ELF specification wants data to start at page boundary so | |
2618 | * we align it here. | |
2619 | */ | |
80f5ce75 | 2620 | data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
edf8e2af MW |
2621 | |
2622 | /* | |
2623 | * Write program headers for memory regions mapped in | |
2624 | * the target process. | |
2625 | */ | |
2626 | for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { | |
2627 | (void) memset(&phdr, 0, sizeof (phdr)); | |
2628 | ||
2629 | phdr.p_type = PT_LOAD; | |
2630 | phdr.p_offset = offset; | |
2631 | phdr.p_vaddr = vma->vma_start; | |
2632 | phdr.p_paddr = 0; | |
2633 | phdr.p_filesz = vma_dump_size(vma); | |
2634 | offset += phdr.p_filesz; | |
2635 | phdr.p_memsz = vma->vma_end - vma->vma_start; | |
2636 | phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0; | |
2637 | if (vma->vma_flags & PROT_WRITE) | |
2638 | phdr.p_flags |= PF_W; | |
2639 | if (vma->vma_flags & PROT_EXEC) | |
2640 | phdr.p_flags |= PF_X; | |
2641 | phdr.p_align = ELF_EXEC_PAGESIZE; | |
2642 | ||
80f5ce75 | 2643 | bswap_phdr(&phdr, 1); |
edf8e2af MW |
2644 | dump_write(fd, &phdr, sizeof (phdr)); |
2645 | } | |
2646 | ||
2647 | /* | |
2648 | * Next we write notes just after program headers. No | |
2649 | * alignment needed here. | |
2650 | */ | |
2651 | if (write_note_info(&info, fd) < 0) | |
2652 | goto out; | |
2653 | ||
2654 | /* align data to page boundary */ | |
edf8e2af MW |
2655 | if (lseek(fd, data_offset, SEEK_SET) != data_offset) |
2656 | goto out; | |
2657 | ||
2658 | /* | |
2659 | * Finally we can dump process memory into corefile as well. | |
2660 | */ | |
2661 | for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { | |
2662 | abi_ulong addr; | |
2663 | abi_ulong end; | |
2664 | ||
2665 | end = vma->vma_start + vma_dump_size(vma); | |
2666 | ||
2667 | for (addr = vma->vma_start; addr < end; | |
d97ef72e | 2668 | addr += TARGET_PAGE_SIZE) { |
edf8e2af MW |
2669 | char page[TARGET_PAGE_SIZE]; |
2670 | int error; | |
2671 | ||
2672 | /* | |
2673 | * Read in page from target process memory and | |
2674 | * write it to coredump file. | |
2675 | */ | |
2676 | error = copy_from_user(page, addr, sizeof (page)); | |
2677 | if (error != 0) { | |
49995e17 | 2678 | (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n", |
d97ef72e | 2679 | addr); |
edf8e2af MW |
2680 | errno = -error; |
2681 | goto out; | |
2682 | } | |
2683 | if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) | |
2684 | goto out; | |
2685 | } | |
2686 | } | |
2687 | ||
d97ef72e | 2688 | out: |
edf8e2af MW |
2689 | free_note_info(&info); |
2690 | if (mm != NULL) | |
2691 | vma_delete(mm); | |
2692 | (void) close(fd); | |
2693 | ||
2694 | if (errno != 0) | |
2695 | return (-errno); | |
2696 | return (0); | |
2697 | } | |
edf8e2af MW |
2698 | #endif /* USE_ELF_CORE_DUMP */ |
2699 | ||
e5fe0c52 PB |
2700 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
2701 | { | |
2702 | init_thread(regs, infop); | |
2703 | } |