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vhost-user-blk: set config ops before vhost-user init
[qemu/ar7.git] / linux-user / elfload.c
blob23e34957f915b8de2f7b2f0fb2a0a8ec2ba89947
1 /* This is the Linux kernel elf-loading code, ported into user space */
2 #include "qemu/osdep.h"
3 #include <sys/param.h>
4
5 #include <sys/resource.h>
6
7 #include "qemu.h"
8 #include "disas/disas.h"
9 #include "qemu/path.h"
10
11 #ifdef _ARCH_PPC64
12 #undef ARCH_DLINFO
13 #undef ELF_PLATFORM
14 #undef ELF_HWCAP
15 #undef ELF_HWCAP2
16 #undef ELF_CLASS
17 #undef ELF_DATA
18 #undef ELF_ARCH
19 #endif
20
21 #define ELF_OSABI ELFOSABI_SYSV
22
23 /* from personality.h */
24
25 /*
26 * Flags for bug emulation.
27 *
28 * These occupy the top three bytes.
29 */
30 enum {
31 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
32 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
33 descriptors (signal handling) */
34 MMAP_PAGE_ZERO = 0x0100000,
35 ADDR_COMPAT_LAYOUT = 0x0200000,
36 READ_IMPLIES_EXEC = 0x0400000,
37 ADDR_LIMIT_32BIT = 0x0800000,
38 SHORT_INODE = 0x1000000,
39 WHOLE_SECONDS = 0x2000000,
40 STICKY_TIMEOUTS = 0x4000000,
41 ADDR_LIMIT_3GB = 0x8000000,
42 };
43
44 /*
45 * Personality types.
46 *
47 * These go in the low byte. Avoid using the top bit, it will
48 * conflict with error returns.
49 */
50 enum {
51 PER_LINUX = 0x0000,
52 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
53 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
54 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
55 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
56 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
57 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
58 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
59 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
60 PER_BSD = 0x0006,
61 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
62 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_LINUX32 = 0x0008,
64 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
65 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
66 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
67 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
68 PER_RISCOS = 0x000c,
69 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
70 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
71 PER_OSF4 = 0x000f, /* OSF/1 v4 */
72 PER_HPUX = 0x0010,
73 PER_MASK = 0x00ff,
74 };
75
76 /*
77 * Return the base personality without flags.
78 */
79 #define personality(pers) (pers & PER_MASK)
80
81 /* this flag is uneffective under linux too, should be deleted */
82 #ifndef MAP_DENYWRITE
83 #define MAP_DENYWRITE 0
84 #endif
85
86 /* should probably go in elf.h */
87 #ifndef ELIBBAD
88 #define ELIBBAD 80
89 #endif
90
91 #ifdef TARGET_WORDS_BIGENDIAN
92 #define ELF_DATA ELFDATA2MSB
93 #else
94 #define ELF_DATA ELFDATA2LSB
95 #endif
96
97 #ifdef TARGET_ABI_MIPSN32
98 typedef abi_ullong target_elf_greg_t;
99 #define tswapreg(ptr) tswap64(ptr)
100 #else
101 typedef abi_ulong target_elf_greg_t;
102 #define tswapreg(ptr) tswapal(ptr)
103 #endif
104
105 #ifdef USE_UID16
106 typedef abi_ushort target_uid_t;
107 typedef abi_ushort target_gid_t;
108 #else
109 typedef abi_uint target_uid_t;
110 typedef abi_uint target_gid_t;
111 #endif
112 typedef abi_int target_pid_t;
113
114 #ifdef TARGET_I386
115
116 #define ELF_PLATFORM get_elf_platform()
117
118 static const char *get_elf_platform(void)
119 {
120 static char elf_platform[] = "i386";
121 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
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 {
133 X86CPU *cpu = X86_CPU(thread_cpu);
134
135 return cpu->env.features[FEAT_1_EDX];
136 }
137
138 #ifdef TARGET_X86_64
139 #define ELF_START_MMAP 0x2aaaaab000ULL
140
141 #define ELF_CLASS ELFCLASS64
142 #define ELF_ARCH EM_X86_64
143
144 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
145 {
146 regs->rax = 0;
147 regs->rsp = infop->start_stack;
148 regs->rip = infop->entry;
149 }
150
151 #define ELF_NREG 27
152 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
153
154 /*
155 * Note that ELF_NREG should be 29 as there should be place for
156 * TRAPNO and ERR "registers" as well but linux doesn't dump
157 * those.
158 *
159 * See linux kernel: arch/x86/include/asm/elf.h
160 */
161 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
162 {
163 (*regs)[0] = env->regs[15];
164 (*regs)[1] = env->regs[14];
165 (*regs)[2] = env->regs[13];
166 (*regs)[3] = env->regs[12];
167 (*regs)[4] = env->regs[R_EBP];
168 (*regs)[5] = env->regs[R_EBX];
169 (*regs)[6] = env->regs[11];
170 (*regs)[7] = env->regs[10];
171 (*regs)[8] = env->regs[9];
172 (*regs)[9] = env->regs[8];
173 (*regs)[10] = env->regs[R_EAX];
174 (*regs)[11] = env->regs[R_ECX];
175 (*regs)[12] = env->regs[R_EDX];
176 (*regs)[13] = env->regs[R_ESI];
177 (*regs)[14] = env->regs[R_EDI];
178 (*regs)[15] = env->regs[R_EAX]; /* XXX */
179 (*regs)[16] = env->eip;
180 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
181 (*regs)[18] = env->eflags;
182 (*regs)[19] = env->regs[R_ESP];
183 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
184 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
185 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
186 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
187 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
188 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
189 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
190 }
191
192 #else
193
194 #define ELF_START_MMAP 0x80000000
195
196 /*
197 * This is used to ensure we don't load something for the wrong architecture.
198 */
199 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
200
201 /*
202 * These are used to set parameters in the core dumps.
203 */
204 #define ELF_CLASS ELFCLASS32
205 #define ELF_ARCH EM_386
206
207 static inline void init_thread(struct target_pt_regs *regs,
208 struct image_info *infop)
209 {
210 regs->esp = infop->start_stack;
211 regs->eip = infop->entry;
212
213 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
214 starts %edx contains a pointer to a function which might be
215 registered using `atexit'. This provides a mean for the
216 dynamic linker to call DT_FINI functions for shared libraries
217 that have been loaded before the code runs.
218
219 A value of 0 tells we have no such handler. */
220 regs->edx = 0;
221 }
222
223 #define ELF_NREG 17
224 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
225
226 /*
227 * Note that ELF_NREG should be 19 as there should be place for
228 * TRAPNO and ERR "registers" as well but linux doesn't dump
229 * those.
230 *
231 * See linux kernel: arch/x86/include/asm/elf.h
232 */
233 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
234 {
235 (*regs)[0] = env->regs[R_EBX];
236 (*regs)[1] = env->regs[R_ECX];
237 (*regs)[2] = env->regs[R_EDX];
238 (*regs)[3] = env->regs[R_ESI];
239 (*regs)[4] = env->regs[R_EDI];
240 (*regs)[5] = env->regs[R_EBP];
241 (*regs)[6] = env->regs[R_EAX];
242 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
243 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
244 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
245 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
246 (*regs)[11] = env->regs[R_EAX]; /* XXX */
247 (*regs)[12] = env->eip;
248 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
249 (*regs)[14] = env->eflags;
250 (*regs)[15] = env->regs[R_ESP];
251 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
252 }
253 #endif
254
255 #define USE_ELF_CORE_DUMP
256 #define ELF_EXEC_PAGESIZE 4096
257
258 #endif
259
260 #ifdef TARGET_ARM
261
262 #ifndef TARGET_AARCH64
263 /* 32 bit ARM definitions */
264
265 #define ELF_START_MMAP 0x80000000
266
267 #define ELF_ARCH EM_ARM
268 #define ELF_CLASS ELFCLASS32
269
270 static inline void init_thread(struct target_pt_regs *regs,
271 struct image_info *infop)
272 {
273 abi_long stack = infop->start_stack;
274 memset(regs, 0, sizeof(*regs));
275
276 regs->uregs[16] = ARM_CPU_MODE_USR;
277 if (infop->entry & 1) {
278 regs->uregs[16] |= CPSR_T;
279 }
280 regs->uregs[15] = infop->entry & 0xfffffffe;
281 regs->uregs[13] = infop->start_stack;
282 /* FIXME - what to for failure of get_user()? */
283 get_user_ual(regs->uregs[2], stack + 8); /* envp */
284 get_user_ual(regs->uregs[1], stack + 4); /* envp */
285 /* XXX: it seems that r0 is zeroed after ! */
286 regs->uregs[0] = 0;
287 /* For uClinux PIC binaries. */
288 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
289 regs->uregs[10] = infop->start_data;
290 }
291
292 #define ELF_NREG 18
293 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
294
295 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
296 {
297 (*regs)[0] = tswapreg(env->regs[0]);
298 (*regs)[1] = tswapreg(env->regs[1]);
299 (*regs)[2] = tswapreg(env->regs[2]);
300 (*regs)[3] = tswapreg(env->regs[3]);
301 (*regs)[4] = tswapreg(env->regs[4]);
302 (*regs)[5] = tswapreg(env->regs[5]);
303 (*regs)[6] = tswapreg(env->regs[6]);
304 (*regs)[7] = tswapreg(env->regs[7]);
305 (*regs)[8] = tswapreg(env->regs[8]);
306 (*regs)[9] = tswapreg(env->regs[9]);
307 (*regs)[10] = tswapreg(env->regs[10]);
308 (*regs)[11] = tswapreg(env->regs[11]);
309 (*regs)[12] = tswapreg(env->regs[12]);
310 (*regs)[13] = tswapreg(env->regs[13]);
311 (*regs)[14] = tswapreg(env->regs[14]);
312 (*regs)[15] = tswapreg(env->regs[15]);
313
314 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
315 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
316 }
317
318 #define USE_ELF_CORE_DUMP
319 #define ELF_EXEC_PAGESIZE 4096
320
321 enum
322 {
323 ARM_HWCAP_ARM_SWP = 1 << 0,
324 ARM_HWCAP_ARM_HALF = 1 << 1,
325 ARM_HWCAP_ARM_THUMB = 1 << 2,
326 ARM_HWCAP_ARM_26BIT = 1 << 3,
327 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
328 ARM_HWCAP_ARM_FPA = 1 << 5,
329 ARM_HWCAP_ARM_VFP = 1 << 6,
330 ARM_HWCAP_ARM_EDSP = 1 << 7,
331 ARM_HWCAP_ARM_JAVA = 1 << 8,
332 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
333 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
334 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
335 ARM_HWCAP_ARM_NEON = 1 << 12,
336 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
337 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
338 ARM_HWCAP_ARM_TLS = 1 << 15,
339 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
340 ARM_HWCAP_ARM_IDIVA = 1 << 17,
341 ARM_HWCAP_ARM_IDIVT = 1 << 18,
342 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
343 ARM_HWCAP_ARM_LPAE = 1 << 20,
344 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
345 };
346
347 enum {
348 ARM_HWCAP2_ARM_AES = 1 << 0,
349 ARM_HWCAP2_ARM_PMULL = 1 << 1,
350 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
351 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
352 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
353 };
354
355 /* The commpage only exists for 32 bit kernels */
356
357 /* Return 1 if the proposed guest space is suitable for the guest.
358 * Return 0 if the proposed guest space isn't suitable, but another
359 * address space should be tried.
360 * Return -1 if there is no way the proposed guest space can be
361 * valid regardless of the base.
362 * The guest code may leave a page mapped and populate it if the
363 * address is suitable.
364 */
365 static int init_guest_commpage(unsigned long guest_base,
366 unsigned long guest_size)
367 {
368 unsigned long real_start, test_page_addr;
369
370 /* We need to check that we can force a fault on access to the
371 * commpage at 0xffff0fxx
372 */
373 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
374
375 /* If the commpage lies within the already allocated guest space,
376 * then there is no way we can allocate it.
377 *
378 * You may be thinking that that this check is redundant because
379 * we already validated the guest size against MAX_RESERVED_VA;
380 * but if qemu_host_page_mask is unusually large, then
381 * test_page_addr may be lower.
382 */
383 if (test_page_addr >= guest_base
384 && test_page_addr < (guest_base + guest_size)) {
385 return -1;
386 }
387
388 /* Note it needs to be writeable to let us initialise it */
389 real_start = (unsigned long)
390 mmap((void *)test_page_addr, qemu_host_page_size,
391 PROT_READ | PROT_WRITE,
392 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
393
394 /* If we can't map it then try another address */
395 if (real_start == -1ul) {
396 return 0;
397 }
398
399 if (real_start != test_page_addr) {
400 /* OS didn't put the page where we asked - unmap and reject */
401 munmap((void *)real_start, qemu_host_page_size);
402 return 0;
403 }
404
405 /* Leave the page mapped
406 * Populate it (mmap should have left it all 0'd)
407 */
408
409 /* Kernel helper versions */
410 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
411
412 /* Now it's populated make it RO */
413 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
414 perror("Protecting guest commpage");
415 exit(-1);
416 }
417
418 return 1; /* All good */
419 }
420
421 #define ELF_HWCAP get_elf_hwcap()
422 #define ELF_HWCAP2 get_elf_hwcap2()
423
424 static uint32_t get_elf_hwcap(void)
425 {
426 ARMCPU *cpu = ARM_CPU(thread_cpu);
427 uint32_t hwcaps = 0;
428
429 hwcaps |= ARM_HWCAP_ARM_SWP;
430 hwcaps |= ARM_HWCAP_ARM_HALF;
431 hwcaps |= ARM_HWCAP_ARM_THUMB;
432 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
433
434 /* probe for the extra features */
435 #define GET_FEATURE(feat, hwcap) \
436 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
437 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
438 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
439 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
440 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
441 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
442 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
443 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
444 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
445 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
446 GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
447 GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
448 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
449 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
450 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
451 * to our VFP_FP16 feature bit.
452 */
453 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
454 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
455
456 return hwcaps;
457 }
458
459 static uint32_t get_elf_hwcap2(void)
460 {
461 ARMCPU *cpu = ARM_CPU(thread_cpu);
462 uint32_t hwcaps = 0;
463
464 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES);
465 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL);
466 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1);
467 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2);
468 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32);
469 return hwcaps;
470 }
471
472 #undef GET_FEATURE
473
474 #else
475 /* 64 bit ARM definitions */
476 #define ELF_START_MMAP 0x80000000
477
478 #define ELF_ARCH EM_AARCH64
479 #define ELF_CLASS ELFCLASS64
480 #define ELF_PLATFORM "aarch64"
481
482 static inline void init_thread(struct target_pt_regs *regs,
483 struct image_info *infop)
484 {
485 abi_long stack = infop->start_stack;
486 memset(regs, 0, sizeof(*regs));
487
488 regs->pc = infop->entry & ~0x3ULL;
489 regs->sp = stack;
490 }
491
492 #define ELF_NREG 34
493 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
494
495 static void elf_core_copy_regs(target_elf_gregset_t *regs,
496 const CPUARMState *env)
497 {
498 int i;
499
500 for (i = 0; i < 32; i++) {
501 (*regs)[i] = tswapreg(env->xregs[i]);
502 }
503 (*regs)[32] = tswapreg(env->pc);
504 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
505 }
506
507 #define USE_ELF_CORE_DUMP
508 #define ELF_EXEC_PAGESIZE 4096
509
510 enum {
511 ARM_HWCAP_A64_FP = 1 << 0,
512 ARM_HWCAP_A64_ASIMD = 1 << 1,
513 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
514 ARM_HWCAP_A64_AES = 1 << 3,
515 ARM_HWCAP_A64_PMULL = 1 << 4,
516 ARM_HWCAP_A64_SHA1 = 1 << 5,
517 ARM_HWCAP_A64_SHA2 = 1 << 6,
518 ARM_HWCAP_A64_CRC32 = 1 << 7,
519 ARM_HWCAP_A64_ATOMICS = 1 << 8,
520 ARM_HWCAP_A64_FPHP = 1 << 9,
521 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
522 ARM_HWCAP_A64_CPUID = 1 << 11,
523 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
524 ARM_HWCAP_A64_JSCVT = 1 << 13,
525 ARM_HWCAP_A64_FCMA = 1 << 14,
526 ARM_HWCAP_A64_LRCPC = 1 << 15,
527 ARM_HWCAP_A64_DCPOP = 1 << 16,
528 ARM_HWCAP_A64_SHA3 = 1 << 17,
529 ARM_HWCAP_A64_SM3 = 1 << 18,
530 ARM_HWCAP_A64_SM4 = 1 << 19,
531 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
532 ARM_HWCAP_A64_SHA512 = 1 << 21,
533 ARM_HWCAP_A64_SVE = 1 << 22,
534 };
535
536 #define ELF_HWCAP get_elf_hwcap()
537
538 static uint32_t get_elf_hwcap(void)
539 {
540 ARMCPU *cpu = ARM_CPU(thread_cpu);
541 uint32_t hwcaps = 0;
542
543 hwcaps |= ARM_HWCAP_A64_FP;
544 hwcaps |= ARM_HWCAP_A64_ASIMD;
545
546 /* probe for the extra features */
547 #define GET_FEATURE(feat, hwcap) \
548 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
549 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES);
550 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
551 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1);
552 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2);
553 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
554 GET_FEATURE(ARM_FEATURE_V8_SHA3, ARM_HWCAP_A64_SHA3);
555 GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3);
556 GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4);
557 GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
558 GET_FEATURE(ARM_FEATURE_V8_FP16,
559 ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
560 GET_FEATURE(ARM_FEATURE_V8_RDM, ARM_HWCAP_A64_ASIMDRDM);
561 GET_FEATURE(ARM_FEATURE_V8_FCMA, ARM_HWCAP_A64_FCMA);
562 #undef GET_FEATURE
563
564 return hwcaps;
565 }
566
567 #endif /* not TARGET_AARCH64 */
568 #endif /* TARGET_ARM */
569
570 #ifdef TARGET_SPARC
571 #ifdef TARGET_SPARC64
572
573 #define ELF_START_MMAP 0x80000000
574 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
575 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
576 #ifndef TARGET_ABI32
577 #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
578 #else
579 #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
580 #endif
581
582 #define ELF_CLASS ELFCLASS64
583 #define ELF_ARCH EM_SPARCV9
584
585 #define STACK_BIAS 2047
586
587 static inline void init_thread(struct target_pt_regs *regs,
588 struct image_info *infop)
589 {
590 #ifndef TARGET_ABI32
591 regs->tstate = 0;
592 #endif
593 regs->pc = infop->entry;
594 regs->npc = regs->pc + 4;
595 regs->y = 0;
596 #ifdef TARGET_ABI32
597 regs->u_regs[14] = infop->start_stack - 16 * 4;
598 #else
599 if (personality(infop->personality) == PER_LINUX32)
600 regs->u_regs[14] = infop->start_stack - 16 * 4;
601 else
602 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
603 #endif
604 }
605
606 #else
607 #define ELF_START_MMAP 0x80000000
608 #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
609 | HWCAP_SPARC_MULDIV)
610
611 #define ELF_CLASS ELFCLASS32
612 #define ELF_ARCH EM_SPARC
613
614 static inline void init_thread(struct target_pt_regs *regs,
615 struct image_info *infop)
616 {
617 regs->psr = 0;
618 regs->pc = infop->entry;
619 regs->npc = regs->pc + 4;
620 regs->y = 0;
621 regs->u_regs[14] = infop->start_stack - 16 * 4;
622 }
623
624 #endif
625 #endif
626
627 #ifdef TARGET_PPC
628
629 #define ELF_MACHINE PPC_ELF_MACHINE
630 #define ELF_START_MMAP 0x80000000
631
632 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
633
634 #define elf_check_arch(x) ( (x) == EM_PPC64 )
635
636 #define ELF_CLASS ELFCLASS64
637
638 #else
639
640 #define ELF_CLASS ELFCLASS32
641
642 #endif
643
644 #define ELF_ARCH EM_PPC
645
646 /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
647 See arch/powerpc/include/asm/cputable.h. */
648 enum {
649 QEMU_PPC_FEATURE_32 = 0x80000000,
650 QEMU_PPC_FEATURE_64 = 0x40000000,
651 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
652 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
653 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
654 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
655 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
656 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
657 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
658 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
659 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
660 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
661 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
662 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
663 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
664 QEMU_PPC_FEATURE_CELL = 0x00010000,
665 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
666 QEMU_PPC_FEATURE_SMT = 0x00004000,
667 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
668 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
669 QEMU_PPC_FEATURE_PA6T = 0x00000800,
670 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
671 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
672 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
673 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
674 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
675
676 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
677 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
678
679 /* Feature definitions in AT_HWCAP2. */
680 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
681 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
682 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
683 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
684 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
685 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
686 };
687
688 #define ELF_HWCAP get_elf_hwcap()
689
690 static uint32_t get_elf_hwcap(void)
691 {
692 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
693 uint32_t features = 0;
694
695 /* We don't have to be terribly complete here; the high points are
696 Altivec/FP/SPE support. Anything else is just a bonus. */
697 #define GET_FEATURE(flag, feature) \
698 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
699 #define GET_FEATURE2(flags, feature) \
700 do { \
701 if ((cpu->env.insns_flags2 & flags) == flags) { \
702 features |= feature; \
703 } \
704 } while (0)
705 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
706 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
707 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
708 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
709 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
710 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
711 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
712 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
713 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
714 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
715 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
716 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
717 QEMU_PPC_FEATURE_ARCH_2_06);
718 #undef GET_FEATURE
719 #undef GET_FEATURE2
720
721 return features;
722 }
723
724 #define ELF_HWCAP2 get_elf_hwcap2()
725
726 static uint32_t get_elf_hwcap2(void)
727 {
728 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
729 uint32_t features = 0;
730
731 #define GET_FEATURE(flag, feature) \
732 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
733 #define GET_FEATURE2(flag, feature) \
734 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
735
736 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
737 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
738 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
739 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
740
741 #undef GET_FEATURE
742 #undef GET_FEATURE2
743
744 return features;
745 }
746
747 /*
748 * The requirements here are:
749 * - keep the final alignment of sp (sp & 0xf)
750 * - make sure the 32-bit value at the first 16 byte aligned position of
751 * AUXV is greater than 16 for glibc compatibility.
752 * AT_IGNOREPPC is used for that.
753 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
754 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
755 */
756 #define DLINFO_ARCH_ITEMS 5
757 #define ARCH_DLINFO \
758 do { \
759 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
760 /* \
761 * Handle glibc compatibility: these magic entries must \
762 * be at the lowest addresses in the final auxv. \
763 */ \
764 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
765 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
766 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
767 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
768 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
769 } while (0)
770
771 static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
772 {
773 _regs->gpr[1] = infop->start_stack;
774 #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
775 if (get_ppc64_abi(infop) < 2) {
776 uint64_t val;
777 get_user_u64(val, infop->entry + 8);
778 _regs->gpr[2] = val + infop->load_bias;
779 get_user_u64(val, infop->entry);
780 infop->entry = val + infop->load_bias;
781 } else {
782 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
783 }
784 #endif
785 _regs->nip = infop->entry;
786 }
787
788 /* See linux kernel: arch/powerpc/include/asm/elf.h. */
789 #define ELF_NREG 48
790 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
791
792 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
793 {
794 int i;
795 target_ulong ccr = 0;
796
797 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
798 (*regs)[i] = tswapreg(env->gpr[i]);
799 }
800
801 (*regs)[32] = tswapreg(env->nip);
802 (*regs)[33] = tswapreg(env->msr);
803 (*regs)[35] = tswapreg(env->ctr);
804 (*regs)[36] = tswapreg(env->lr);
805 (*regs)[37] = tswapreg(env->xer);
806
807 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
808 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
809 }
810 (*regs)[38] = tswapreg(ccr);
811 }
812
813 #define USE_ELF_CORE_DUMP
814 #define ELF_EXEC_PAGESIZE 4096
815
816 #endif
817
818 #ifdef TARGET_MIPS
819
820 #define ELF_START_MMAP 0x80000000
821
822 #ifdef TARGET_MIPS64
823 #define ELF_CLASS ELFCLASS64
824 #else
825 #define ELF_CLASS ELFCLASS32
826 #endif
827 #define ELF_ARCH EM_MIPS
828
829 static inline void init_thread(struct target_pt_regs *regs,
830 struct image_info *infop)
831 {
832 regs->cp0_status = 2 << CP0St_KSU;
833 regs->cp0_epc = infop->entry;
834 regs->regs[29] = infop->start_stack;
835 }
836
837 /* See linux kernel: arch/mips/include/asm/elf.h. */
838 #define ELF_NREG 45
839 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
840
841 /* See linux kernel: arch/mips/include/asm/reg.h. */
842 enum {
843 #ifdef TARGET_MIPS64
844 TARGET_EF_R0 = 0,
845 #else
846 TARGET_EF_R0 = 6,
847 #endif
848 TARGET_EF_R26 = TARGET_EF_R0 + 26,
849 TARGET_EF_R27 = TARGET_EF_R0 + 27,
850 TARGET_EF_LO = TARGET_EF_R0 + 32,
851 TARGET_EF_HI = TARGET_EF_R0 + 33,
852 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
853 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
854 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
855 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
856 };
857
858 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
859 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
860 {
861 int i;
862
863 for (i = 0; i < TARGET_EF_R0; i++) {
864 (*regs)[i] = 0;
865 }
866 (*regs)[TARGET_EF_R0] = 0;
867
868 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
869 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
870 }
871
872 (*regs)[TARGET_EF_R26] = 0;
873 (*regs)[TARGET_EF_R27] = 0;
874 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
875 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
876 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
877 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
878 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
879 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
880 }
881
882 #define USE_ELF_CORE_DUMP
883 #define ELF_EXEC_PAGESIZE 4096
884
885 #endif /* TARGET_MIPS */
886
887 #ifdef TARGET_MICROBLAZE
888
889 #define ELF_START_MMAP 0x80000000
890
891 #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
892
893 #define ELF_CLASS ELFCLASS32
894 #define ELF_ARCH EM_MICROBLAZE
895
896 static inline void init_thread(struct target_pt_regs *regs,
897 struct image_info *infop)
898 {
899 regs->pc = infop->entry;
900 regs->r1 = infop->start_stack;
901
902 }
903
904 #define ELF_EXEC_PAGESIZE 4096
905
906 #define USE_ELF_CORE_DUMP
907 #define ELF_NREG 38
908 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
909
910 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
911 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
912 {
913 int i, pos = 0;
914
915 for (i = 0; i < 32; i++) {
916 (*regs)[pos++] = tswapreg(env->regs[i]);
917 }
918
919 for (i = 0; i < 6; i++) {
920 (*regs)[pos++] = tswapreg(env->sregs[i]);
921 }
922 }
923
924 #endif /* TARGET_MICROBLAZE */
925
926 #ifdef TARGET_NIOS2
927
928 #define ELF_START_MMAP 0x80000000
929
930 #define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
931
932 #define ELF_CLASS ELFCLASS32
933 #define ELF_ARCH EM_ALTERA_NIOS2
934
935 static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
936 {
937 regs->ea = infop->entry;
938 regs->sp = infop->start_stack;
939 regs->estatus = 0x3;
940 }
941
942 #define ELF_EXEC_PAGESIZE 4096
943
944 #define USE_ELF_CORE_DUMP
945 #define ELF_NREG 49
946 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
947
948 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
949 static void elf_core_copy_regs(target_elf_gregset_t *regs,
950 const CPUNios2State *env)
951 {
952 int i;
953
954 (*regs)[0] = -1;
955 for (i = 1; i < 8; i++) /* r0-r7 */
956 (*regs)[i] = tswapreg(env->regs[i + 7]);
957
958 for (i = 8; i < 16; i++) /* r8-r15 */
959 (*regs)[i] = tswapreg(env->regs[i - 8]);
960
961 for (i = 16; i < 24; i++) /* r16-r23 */
962 (*regs)[i] = tswapreg(env->regs[i + 7]);
963 (*regs)[24] = -1; /* R_ET */
964 (*regs)[25] = -1; /* R_BT */
965 (*regs)[26] = tswapreg(env->regs[R_GP]);
966 (*regs)[27] = tswapreg(env->regs[R_SP]);
967 (*regs)[28] = tswapreg(env->regs[R_FP]);
968 (*regs)[29] = tswapreg(env->regs[R_EA]);
969 (*regs)[30] = -1; /* R_SSTATUS */
970 (*regs)[31] = tswapreg(env->regs[R_RA]);
971
972 (*regs)[32] = tswapreg(env->regs[R_PC]);
973
974 (*regs)[33] = -1; /* R_STATUS */
975 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
976
977 for (i = 35; i < 49; i++) /* ... */
978 (*regs)[i] = -1;
979 }
980
981 #endif /* TARGET_NIOS2 */
982
983 #ifdef TARGET_OPENRISC
984
985 #define ELF_START_MMAP 0x08000000
986
987 #define ELF_ARCH EM_OPENRISC
988 #define ELF_CLASS ELFCLASS32
989 #define ELF_DATA ELFDATA2MSB
990
991 static inline void init_thread(struct target_pt_regs *regs,
992 struct image_info *infop)
993 {
994 regs->pc = infop->entry;
995 regs->gpr[1] = infop->start_stack;
996 }
997
998 #define USE_ELF_CORE_DUMP
999 #define ELF_EXEC_PAGESIZE 8192
1000
1001 /* See linux kernel arch/openrisc/include/asm/elf.h. */
1002 #define ELF_NREG 34 /* gprs and pc, sr */
1003 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1004
1005 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1006 const CPUOpenRISCState *env)
1007 {
1008 int i;
1009
1010 for (i = 0; i < 32; i++) {
1011 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
1012 }
1013 (*regs)[32] = tswapreg(env->pc);
1014 (*regs)[33] = tswapreg(cpu_get_sr(env));
1015 }
1016 #define ELF_HWCAP 0
1017 #define ELF_PLATFORM NULL
1018
1019 #endif /* TARGET_OPENRISC */
1020
1021 #ifdef TARGET_SH4
1022
1023 #define ELF_START_MMAP 0x80000000
1024
1025 #define ELF_CLASS ELFCLASS32
1026 #define ELF_ARCH EM_SH
1027
1028 static inline void init_thread(struct target_pt_regs *regs,
1029 struct image_info *infop)
1030 {
1031 /* Check other registers XXXXX */
1032 regs->pc = infop->entry;
1033 regs->regs[15] = infop->start_stack;
1034 }
1035
1036 /* See linux kernel: arch/sh/include/asm/elf.h. */
1037 #define ELF_NREG 23
1038 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1039
1040 /* See linux kernel: arch/sh/include/asm/ptrace.h. */
1041 enum {
1042 TARGET_REG_PC = 16,
1043 TARGET_REG_PR = 17,
1044 TARGET_REG_SR = 18,
1045 TARGET_REG_GBR = 19,
1046 TARGET_REG_MACH = 20,
1047 TARGET_REG_MACL = 21,
1048 TARGET_REG_SYSCALL = 22
1049 };
1050
1051 static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
1052 const CPUSH4State *env)
1053 {
1054 int i;
1055
1056 for (i = 0; i < 16; i++) {
1057 (*regs)[i] = tswapreg(env->gregs[i]);
1058 }
1059
1060 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1061 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1062 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1063 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1064 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1065 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
1066 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1067 }
1068
1069 #define USE_ELF_CORE_DUMP
1070 #define ELF_EXEC_PAGESIZE 4096
1071
1072 enum {
1073 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1074 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1075 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1076 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1077 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1078 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1079 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1080 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1081 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1082 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1083 };
1084
1085 #define ELF_HWCAP get_elf_hwcap()
1086
1087 static uint32_t get_elf_hwcap(void)
1088 {
1089 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1090 uint32_t hwcap = 0;
1091
1092 hwcap |= SH_CPU_HAS_FPU;
1093
1094 if (cpu->env.features & SH_FEATURE_SH4A) {
1095 hwcap |= SH_CPU_HAS_LLSC;
1096 }
1097
1098 return hwcap;
1099 }
1100
1101 #endif
1102
1103 #ifdef TARGET_CRIS
1104
1105 #define ELF_START_MMAP 0x80000000
1106
1107 #define ELF_CLASS ELFCLASS32
1108 #define ELF_ARCH EM_CRIS
1109
1110 static inline void init_thread(struct target_pt_regs *regs,
1111 struct image_info *infop)
1112 {
1113 regs->erp = infop->entry;
1114 }
1115
1116 #define ELF_EXEC_PAGESIZE 8192
1117
1118 #endif
1119
1120 #ifdef TARGET_M68K
1121
1122 #define ELF_START_MMAP 0x80000000
1123
1124 #define ELF_CLASS ELFCLASS32
1125 #define ELF_ARCH EM_68K
1126
1127 /* ??? Does this need to do anything?
1128 #define ELF_PLAT_INIT(_r) */
1129
1130 static inline void init_thread(struct target_pt_regs *regs,
1131 struct image_info *infop)
1132 {
1133 regs->usp = infop->start_stack;
1134 regs->sr = 0;
1135 regs->pc = infop->entry;
1136 }
1137
1138 /* See linux kernel: arch/m68k/include/asm/elf.h. */
1139 #define ELF_NREG 20
1140 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1141
1142 static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
1143 {
1144 (*regs)[0] = tswapreg(env->dregs[1]);
1145 (*regs)[1] = tswapreg(env->dregs[2]);
1146 (*regs)[2] = tswapreg(env->dregs[3]);
1147 (*regs)[3] = tswapreg(env->dregs[4]);
1148 (*regs)[4] = tswapreg(env->dregs[5]);
1149 (*regs)[5] = tswapreg(env->dregs[6]);
1150 (*regs)[6] = tswapreg(env->dregs[7]);
1151 (*regs)[7] = tswapreg(env->aregs[0]);
1152 (*regs)[8] = tswapreg(env->aregs[1]);
1153 (*regs)[9] = tswapreg(env->aregs[2]);
1154 (*regs)[10] = tswapreg(env->aregs[3]);
1155 (*regs)[11] = tswapreg(env->aregs[4]);
1156 (*regs)[12] = tswapreg(env->aregs[5]);
1157 (*regs)[13] = tswapreg(env->aregs[6]);
1158 (*regs)[14] = tswapreg(env->dregs[0]);
1159 (*regs)[15] = tswapreg(env->aregs[7]);
1160 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1161 (*regs)[17] = tswapreg(env->sr);
1162 (*regs)[18] = tswapreg(env->pc);
1163 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1164 }
1165
1166 #define USE_ELF_CORE_DUMP
1167 #define ELF_EXEC_PAGESIZE 8192
1168
1169 #endif
1170
1171 #ifdef TARGET_ALPHA
1172
1173 #define ELF_START_MMAP (0x30000000000ULL)
1174
1175 #define ELF_CLASS ELFCLASS64
1176 #define ELF_ARCH EM_ALPHA
1177
1178 static inline void init_thread(struct target_pt_regs *regs,
1179 struct image_info *infop)
1180 {
1181 regs->pc = infop->entry;
1182 regs->ps = 8;
1183 regs->usp = infop->start_stack;
1184 }
1185
1186 #define ELF_EXEC_PAGESIZE 8192
1187
1188 #endif /* TARGET_ALPHA */
1189
1190 #ifdef TARGET_S390X
1191
1192 #define ELF_START_MMAP (0x20000000000ULL)
1193
1194 #define ELF_CLASS ELFCLASS64
1195 #define ELF_DATA ELFDATA2MSB
1196 #define ELF_ARCH EM_S390
1197
1198 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1199 {
1200 regs->psw.addr = infop->entry;
1201 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1202 regs->gprs[15] = infop->start_stack;
1203 }
1204
1205 #endif /* TARGET_S390X */
1206
1207 #ifdef TARGET_TILEGX
1208
1209 /* 42 bits real used address, a half for user mode */
1210 #define ELF_START_MMAP (0x00000020000000000ULL)
1211
1212 #define elf_check_arch(x) ((x) == EM_TILEGX)
1213
1214 #define ELF_CLASS ELFCLASS64
1215 #define ELF_DATA ELFDATA2LSB
1216 #define ELF_ARCH EM_TILEGX
1217
1218 static inline void init_thread(struct target_pt_regs *regs,
1219 struct image_info *infop)
1220 {
1221 regs->pc = infop->entry;
1222 regs->sp = infop->start_stack;
1223
1224 }
1225
1226 #define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1227
1228 #endif /* TARGET_TILEGX */
1229
1230 #ifdef TARGET_RISCV
1231
1232 #define ELF_START_MMAP 0x80000000
1233 #define ELF_ARCH EM_RISCV
1234
1235 #ifdef TARGET_RISCV32
1236 #define ELF_CLASS ELFCLASS32
1237 #else
1238 #define ELF_CLASS ELFCLASS64
1239 #endif
1240
1241 static inline void init_thread(struct target_pt_regs *regs,
1242 struct image_info *infop)
1243 {
1244 regs->sepc = infop->entry;
1245 regs->sp = infop->start_stack;
1246 }
1247
1248 #define ELF_EXEC_PAGESIZE 4096
1249
1250 #endif /* TARGET_RISCV */
1251
1252 #ifdef TARGET_HPPA
1253
1254 #define ELF_START_MMAP 0x80000000
1255 #define ELF_CLASS ELFCLASS32
1256 #define ELF_ARCH EM_PARISC
1257 #define ELF_PLATFORM "PARISC"
1258 #define STACK_GROWS_DOWN 0
1259 #define STACK_ALIGNMENT 64
1260
1261 static inline void init_thread(struct target_pt_regs *regs,
1262 struct image_info *infop)
1263 {
1264 regs->iaoq[0] = infop->entry;
1265 regs->iaoq[1] = infop->entry + 4;
1266 regs->gr[23] = 0;
1267 regs->gr[24] = infop->arg_start;
1268 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1269 /* The top-of-stack contains a linkage buffer. */
1270 regs->gr[30] = infop->start_stack + 64;
1271 regs->gr[31] = infop->entry;
1272 }
1273
1274 #endif /* TARGET_HPPA */
1275
1276 #ifdef TARGET_XTENSA
1277
1278 #define ELF_START_MMAP 0x20000000
1279
1280 #define ELF_CLASS ELFCLASS32
1281 #define ELF_ARCH EM_XTENSA
1282
1283 static inline void init_thread(struct target_pt_regs *regs,
1284 struct image_info *infop)
1285 {
1286 regs->windowbase = 0;
1287 regs->windowstart = 1;
1288 regs->areg[1] = infop->start_stack;
1289 regs->pc = infop->entry;
1290 }
1291
1292 /* See linux kernel: arch/xtensa/include/asm/elf.h. */
1293 #define ELF_NREG 128
1294 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1295
1296 enum {
1297 TARGET_REG_PC,
1298 TARGET_REG_PS,
1299 TARGET_REG_LBEG,
1300 TARGET_REG_LEND,
1301 TARGET_REG_LCOUNT,
1302 TARGET_REG_SAR,
1303 TARGET_REG_WINDOWSTART,
1304 TARGET_REG_WINDOWBASE,
1305 TARGET_REG_THREADPTR,
1306 TARGET_REG_AR0 = 64,
1307 };
1308
1309 static void elf_core_copy_regs(target_elf_gregset_t *regs,
1310 const CPUXtensaState *env)
1311 {
1312 unsigned i;
1313
1314 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1315 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1316 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1317 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1318 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1319 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1320 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1321 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1322 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1323 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1324 for (i = 0; i < env->config->nareg; ++i) {
1325 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1326 }
1327 }
1328
1329 #define USE_ELF_CORE_DUMP
1330 #define ELF_EXEC_PAGESIZE 4096
1331
1332 #endif /* TARGET_XTENSA */
1333
1334 #ifndef ELF_PLATFORM
1335 #define ELF_PLATFORM (NULL)
1336 #endif
1337
1338 #ifndef ELF_MACHINE
1339 #define ELF_MACHINE ELF_ARCH
1340 #endif
1341
1342 #ifndef elf_check_arch
1343 #define elf_check_arch(x) ((x) == ELF_ARCH)
1344 #endif
1345
1346 #ifndef ELF_HWCAP
1347 #define ELF_HWCAP 0
1348 #endif
1349
1350 #ifndef STACK_GROWS_DOWN
1351 #define STACK_GROWS_DOWN 1
1352 #endif
1353
1354 #ifndef STACK_ALIGNMENT
1355 #define STACK_ALIGNMENT 16
1356 #endif
1357
1358 #ifdef TARGET_ABI32
1359 #undef ELF_CLASS
1360 #define ELF_CLASS ELFCLASS32
1361 #undef bswaptls
1362 #define bswaptls(ptr) bswap32s(ptr)
1363 #endif
1364
1365 #include "elf.h"
1366
1367 struct exec
1368 {
1369 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1370 unsigned int a_text; /* length of text, in bytes */
1371 unsigned int a_data; /* length of data, in bytes */
1372 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1373 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1374 unsigned int a_entry; /* start address */
1375 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1376 unsigned int a_drsize; /* length of relocation info for data, in bytes */
1377 };
1378
1379
1380 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
1381 #define OMAGIC 0407
1382 #define NMAGIC 0410
1383 #define ZMAGIC 0413
1384 #define QMAGIC 0314
1385
1386 /* Necessary parameters */
1387 #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
1388 #define TARGET_ELF_PAGESTART(_v) ((_v) & \
1389 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
1390 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
1391
1392 #define DLINFO_ITEMS 15
1393
1394 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1395 {
1396 memcpy(to, from, n);
1397 }
1398
1399 #ifdef BSWAP_NEEDED
1400 static void bswap_ehdr(struct elfhdr *ehdr)
1401 {
1402 bswap16s(&ehdr->e_type); /* Object file type */
1403 bswap16s(&ehdr->e_machine); /* Architecture */
1404 bswap32s(&ehdr->e_version); /* Object file version */
1405 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1406 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1407 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1408 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1409 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1410 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1411 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1412 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1413 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1414 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
1415 }
1416
1417 static void bswap_phdr(struct elf_phdr *phdr, int phnum)
1418 {
1419 int i;
1420 for (i = 0; i < phnum; ++i, ++phdr) {
1421 bswap32s(&phdr->p_type); /* Segment type */
1422 bswap32s(&phdr->p_flags); /* Segment flags */
1423 bswaptls(&phdr->p_offset); /* Segment file offset */
1424 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1425 bswaptls(&phdr->p_paddr); /* Segment physical address */
1426 bswaptls(&phdr->p_filesz); /* Segment size in file */
1427 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1428 bswaptls(&phdr->p_align); /* Segment alignment */
1429 }
1430 }
1431
1432 static void bswap_shdr(struct elf_shdr *shdr, int shnum)
1433 {
1434 int i;
1435 for (i = 0; i < shnum; ++i, ++shdr) {
1436 bswap32s(&shdr->sh_name);
1437 bswap32s(&shdr->sh_type);
1438 bswaptls(&shdr->sh_flags);
1439 bswaptls(&shdr->sh_addr);
1440 bswaptls(&shdr->sh_offset);
1441 bswaptls(&shdr->sh_size);
1442 bswap32s(&shdr->sh_link);
1443 bswap32s(&shdr->sh_info);
1444 bswaptls(&shdr->sh_addralign);
1445 bswaptls(&shdr->sh_entsize);
1446 }
1447 }
1448
1449 static void bswap_sym(struct elf_sym *sym)
1450 {
1451 bswap32s(&sym->st_name);
1452 bswaptls(&sym->st_value);
1453 bswaptls(&sym->st_size);
1454 bswap16s(&sym->st_shndx);
1455 }
1456 #else
1457 static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1458 static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1459 static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1460 static inline void bswap_sym(struct elf_sym *sym) { }
1461 #endif
1462
1463 #ifdef USE_ELF_CORE_DUMP
1464 static int elf_core_dump(int, const CPUArchState *);
1465 #endif /* USE_ELF_CORE_DUMP */
1466 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
1467
1468 /* Verify the portions of EHDR within E_IDENT for the target.
1469 This can be performed before bswapping the entire header. */
1470 static bool elf_check_ident(struct elfhdr *ehdr)
1471 {
1472 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1473 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1474 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1475 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1476 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1477 && ehdr->e_ident[EI_DATA] == ELF_DATA
1478 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1479 }
1480
1481 /* Verify the portions of EHDR outside of E_IDENT for the target.
1482 This has to wait until after bswapping the header. */
1483 static bool elf_check_ehdr(struct elfhdr *ehdr)
1484 {
1485 return (elf_check_arch(ehdr->e_machine)
1486 && ehdr->e_ehsize == sizeof(struct elfhdr)
1487 && ehdr->e_phentsize == sizeof(struct elf_phdr)
1488 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1489 }
1490
1491 /*
1492 * 'copy_elf_strings()' copies argument/envelope strings from user
1493 * memory to free pages in kernel mem. These are in a format ready
1494 * to be put directly into the top of new user memory.
1495 *
1496 */
1497 static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1498 abi_ulong p, abi_ulong stack_limit)
1499 {
1500 char *tmp;
1501 int len, i;
1502 abi_ulong top = p;
1503
1504 if (!p) {
1505 return 0; /* bullet-proofing */
1506 }
1507
1508 if (STACK_GROWS_DOWN) {
1509 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1510 for (i = argc - 1; i >= 0; --i) {
1511 tmp = argv[i];
1512 if (!tmp) {
1513 fprintf(stderr, "VFS: argc is wrong");
1514 exit(-1);
1515 }
1516 len = strlen(tmp) + 1;
1517 tmp += len;
1518
1519 if (len > (p - stack_limit)) {
1520 return 0;
1521 }
1522 while (len) {
1523 int bytes_to_copy = (len > offset) ? offset : len;
1524 tmp -= bytes_to_copy;
1525 p -= bytes_to_copy;
1526 offset -= bytes_to_copy;
1527 len -= bytes_to_copy;
1528
1529 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1530
1531 if (offset == 0) {
1532 memcpy_to_target(p, scratch, top - p);
1533 top = p;
1534 offset = TARGET_PAGE_SIZE;
1535 }
1536 }
1537 }
1538 if (p != top) {
1539 memcpy_to_target(p, scratch + offset, top - p);
1540 }
1541 } else {
1542 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1543 for (i = 0; i < argc; ++i) {
1544 tmp = argv[i];
1545 if (!tmp) {
1546 fprintf(stderr, "VFS: argc is wrong");
1547 exit(-1);
1548 }
1549 len = strlen(tmp) + 1;
1550 if (len > (stack_limit - p)) {
1551 return 0;
1552 }
1553 while (len) {
1554 int bytes_to_copy = (len > remaining) ? remaining : len;
1555
1556 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1557
1558 tmp += bytes_to_copy;
1559 remaining -= bytes_to_copy;
1560 p += bytes_to_copy;
1561 len -= bytes_to_copy;
1562
1563 if (remaining == 0) {
1564 memcpy_to_target(top, scratch, p - top);
1565 top = p;
1566 remaining = TARGET_PAGE_SIZE;
1567 }
1568 }
1569 }
1570 if (p != top) {
1571 memcpy_to_target(top, scratch, p - top);
1572 }
1573 }
1574
1575 return p;
1576 }
1577
1578 /* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1579 * argument/environment space. Newer kernels (>2.6.33) allow more,
1580 * dependent on stack size, but guarantee at least 32 pages for
1581 * backwards compatibility.
1582 */
1583 #define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1584
1585 static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
1586 struct image_info *info)
1587 {
1588 abi_ulong size, error, guard;
1589
1590 size = guest_stack_size;
1591 if (size < STACK_LOWER_LIMIT) {
1592 size = STACK_LOWER_LIMIT;
1593 }
1594 guard = TARGET_PAGE_SIZE;
1595 if (guard < qemu_real_host_page_size) {
1596 guard = qemu_real_host_page_size;
1597 }
1598
1599 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1600 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1601 if (error == -1) {
1602 perror("mmap stack");
1603 exit(-1);
1604 }
1605
1606 /* We reserve one extra page at the top of the stack as guard. */
1607 if (STACK_GROWS_DOWN) {
1608 target_mprotect(error, guard, PROT_NONE);
1609 info->stack_limit = error + guard;
1610 return info->stack_limit + size - sizeof(void *);
1611 } else {
1612 target_mprotect(error + size, guard, PROT_NONE);
1613 info->stack_limit = error + size;
1614 return error;
1615 }
1616 }
1617
1618 /* Map and zero the bss. We need to explicitly zero any fractional pages
1619 after the data section (i.e. bss). */
1620 static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
1621 {
1622 uintptr_t host_start, host_map_start, host_end;
1623
1624 last_bss = TARGET_PAGE_ALIGN(last_bss);
1625
1626 /* ??? There is confusion between qemu_real_host_page_size and
1627 qemu_host_page_size here and elsewhere in target_mmap, which
1628 may lead to the end of the data section mapping from the file
1629 not being mapped. At least there was an explicit test and
1630 comment for that here, suggesting that "the file size must
1631 be known". The comment probably pre-dates the introduction
1632 of the fstat system call in target_mmap which does in fact
1633 find out the size. What isn't clear is if the workaround
1634 here is still actually needed. For now, continue with it,
1635 but merge it with the "normal" mmap that would allocate the bss. */
1636
1637 host_start = (uintptr_t) g2h(elf_bss);
1638 host_end = (uintptr_t) g2h(last_bss);
1639 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
1640
1641 if (host_map_start < host_end) {
1642 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1643 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1644 if (p == MAP_FAILED) {
1645 perror("cannot mmap brk");
1646 exit(-1);
1647 }
1648 }
1649
1650 /* Ensure that the bss page(s) are valid */
1651 if ((page_get_flags(last_bss-1) & prot) != prot) {
1652 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
1653 }
1654
1655 if (host_start < host_map_start) {
1656 memset((void *)host_start, 0, host_map_start - host_start);
1657 }
1658 }
1659
1660 #ifdef CONFIG_USE_FDPIC
1661 static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1662 {
1663 uint16_t n;
1664 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1665
1666 /* elf32_fdpic_loadseg */
1667 n = info->nsegs;
1668 while (n--) {
1669 sp -= 12;
1670 put_user_u32(loadsegs[n].addr, sp+0);
1671 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1672 put_user_u32(loadsegs[n].p_memsz, sp+8);
1673 }
1674
1675 /* elf32_fdpic_loadmap */
1676 sp -= 4;
1677 put_user_u16(0, sp+0); /* version */
1678 put_user_u16(info->nsegs, sp+2); /* nsegs */
1679
1680 info->personality = PER_LINUX_FDPIC;
1681 info->loadmap_addr = sp;
1682
1683 return sp;
1684 }
1685 #endif
1686
1687 static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
1688 struct elfhdr *exec,
1689 struct image_info *info,
1690 struct image_info *interp_info)
1691 {
1692 abi_ulong sp;
1693 abi_ulong u_argc, u_argv, u_envp, u_auxv;
1694 int size;
1695 int i;
1696 abi_ulong u_rand_bytes;
1697 uint8_t k_rand_bytes[16];
1698 abi_ulong u_platform;
1699 const char *k_platform;
1700 const int n = sizeof(elf_addr_t);
1701
1702 sp = p;
1703
1704 #ifdef CONFIG_USE_FDPIC
1705 /* Needs to be before we load the env/argc/... */
1706 if (elf_is_fdpic(exec)) {
1707 /* Need 4 byte alignment for these structs */
1708 sp &= ~3;
1709 sp = loader_build_fdpic_loadmap(info, sp);
1710 info->other_info = interp_info;
1711 if (interp_info) {
1712 interp_info->other_info = info;
1713 sp = loader_build_fdpic_loadmap(interp_info, sp);
1714 }
1715 }
1716 #endif
1717
1718 u_platform = 0;
1719 k_platform = ELF_PLATFORM;
1720 if (k_platform) {
1721 size_t len = strlen(k_platform) + 1;
1722 if (STACK_GROWS_DOWN) {
1723 sp -= (len + n - 1) & ~(n - 1);
1724 u_platform = sp;
1725 /* FIXME - check return value of memcpy_to_target() for failure */
1726 memcpy_to_target(sp, k_platform, len);
1727 } else {
1728 memcpy_to_target(sp, k_platform, len);
1729 u_platform = sp;
1730 sp += len + 1;
1731 }
1732 }
1733
1734 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1735 * the argv and envp pointers.
1736 */
1737 if (STACK_GROWS_DOWN) {
1738 sp = QEMU_ALIGN_DOWN(sp, 16);
1739 } else {
1740 sp = QEMU_ALIGN_UP(sp, 16);
1741 }
1742
1743 /*
1744 * Generate 16 random bytes for userspace PRNG seeding (not
1745 * cryptically secure but it's not the aim of QEMU).
1746 */
1747 for (i = 0; i < 16; i++) {
1748 k_rand_bytes[i] = rand();
1749 }
1750 if (STACK_GROWS_DOWN) {
1751 sp -= 16;
1752 u_rand_bytes = sp;
1753 /* FIXME - check return value of memcpy_to_target() for failure */
1754 memcpy_to_target(sp, k_rand_bytes, 16);
1755 } else {
1756 memcpy_to_target(sp, k_rand_bytes, 16);
1757 u_rand_bytes = sp;
1758 sp += 16;
1759 }
1760
1761 size = (DLINFO_ITEMS + 1) * 2;
1762 if (k_platform)
1763 size += 2;
1764 #ifdef DLINFO_ARCH_ITEMS
1765 size += DLINFO_ARCH_ITEMS * 2;
1766 #endif
1767 #ifdef ELF_HWCAP2
1768 size += 2;
1769 #endif
1770 info->auxv_len = size * n;
1771
1772 size += envc + argc + 2;
1773 size += 1; /* argc itself */
1774 size *= n;
1775
1776 /* Allocate space and finalize stack alignment for entry now. */
1777 if (STACK_GROWS_DOWN) {
1778 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1779 sp = u_argc;
1780 } else {
1781 u_argc = sp;
1782 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1783 }
1784
1785 u_argv = u_argc + n;
1786 u_envp = u_argv + (argc + 1) * n;
1787 u_auxv = u_envp + (envc + 1) * n;
1788 info->saved_auxv = u_auxv;
1789 info->arg_start = u_argv;
1790 info->arg_end = u_argv + argc * n;
1791
1792 /* This is correct because Linux defines
1793 * elf_addr_t as Elf32_Off / Elf64_Off
1794 */
1795 #define NEW_AUX_ENT(id, val) do { \
1796 put_user_ual(id, u_auxv); u_auxv += n; \
1797 put_user_ual(val, u_auxv); u_auxv += n; \
1798 } while(0)
1799
1800 #ifdef ARCH_DLINFO
1801 /*
1802 * ARCH_DLINFO must come first so platform specific code can enforce
1803 * special alignment requirements on the AUXV if necessary (eg. PPC).
1804 */
1805 ARCH_DLINFO;
1806 #endif
1807 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1808 * on info->auxv_len will trigger.
1809 */
1810 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
1811 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1812 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1813 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, getpagesize())));
1814 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
1815 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
1816 NEW_AUX_ENT(AT_ENTRY, info->entry);
1817 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1818 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1819 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1820 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1821 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1822 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
1823 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
1824 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
1825
1826 #ifdef ELF_HWCAP2
1827 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1828 #endif
1829
1830 if (u_platform) {
1831 NEW_AUX_ENT(AT_PLATFORM, u_platform);
1832 }
1833 NEW_AUX_ENT (AT_NULL, 0);
1834 #undef NEW_AUX_ENT
1835
1836 /* Check that our initial calculation of the auxv length matches how much
1837 * we actually put into it.
1838 */
1839 assert(info->auxv_len == u_auxv - info->saved_auxv);
1840
1841 put_user_ual(argc, u_argc);
1842
1843 p = info->arg_strings;
1844 for (i = 0; i < argc; ++i) {
1845 put_user_ual(p, u_argv);
1846 u_argv += n;
1847 p += target_strlen(p) + 1;
1848 }
1849 put_user_ual(0, u_argv);
1850
1851 p = info->env_strings;
1852 for (i = 0; i < envc; ++i) {
1853 put_user_ual(p, u_envp);
1854 u_envp += n;
1855 p += target_strlen(p) + 1;
1856 }
1857 put_user_ual(0, u_envp);
1858
1859 return sp;
1860 }
1861
1862 unsigned long init_guest_space(unsigned long host_start,
1863 unsigned long host_size,
1864 unsigned long guest_start,
1865 bool fixed)
1866 {
1867 unsigned long current_start, aligned_start;
1868 int flags;
1869
1870 assert(host_start || host_size);
1871
1872 /* If just a starting address is given, then just verify that
1873 * address. */
1874 if (host_start && !host_size) {
1875 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
1876 if (init_guest_commpage(host_start, host_size) != 1) {
1877 return (unsigned long)-1;
1878 }
1879 #endif
1880 return host_start;
1881 }
1882
1883 /* Setup the initial flags and start address. */
1884 current_start = host_start & qemu_host_page_mask;
1885 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
1886 if (fixed) {
1887 flags |= MAP_FIXED;
1888 }
1889
1890 /* Otherwise, a non-zero size region of memory needs to be mapped
1891 * and validated. */
1892
1893 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
1894 /* On 32-bit ARM, we need to map not just the usable memory, but
1895 * also the commpage. Try to find a suitable place by allocating
1896 * a big chunk for all of it. If host_start, then the naive
1897 * strategy probably does good enough.
1898 */
1899 if (!host_start) {
1900 unsigned long guest_full_size, host_full_size, real_start;
1901
1902 guest_full_size =
1903 (0xffff0f00 & qemu_host_page_mask) + qemu_host_page_size;
1904 host_full_size = guest_full_size - guest_start;
1905 real_start = (unsigned long)
1906 mmap(NULL, host_full_size, PROT_NONE, flags, -1, 0);
1907 if (real_start == (unsigned long)-1) {
1908 if (host_size < host_full_size - qemu_host_page_size) {
1909 /* We failed to map a continous segment, but we're
1910 * allowed to have a gap between the usable memory and
1911 * the commpage where other things can be mapped.
1912 * This sparseness gives us more flexibility to find
1913 * an address range.
1914 */
1915 goto naive;
1916 }
1917 return (unsigned long)-1;
1918 }
1919 munmap((void *)real_start, host_full_size);
1920 if (real_start & ~qemu_host_page_mask) {
1921 /* The same thing again, but with an extra qemu_host_page_size
1922 * so that we can shift around alignment.
1923 */
1924 unsigned long real_size = host_full_size + qemu_host_page_size;
1925 real_start = (unsigned long)
1926 mmap(NULL, real_size, PROT_NONE, flags, -1, 0);
1927 if (real_start == (unsigned long)-1) {
1928 if (host_size < host_full_size - qemu_host_page_size) {
1929 goto naive;
1930 }
1931 return (unsigned long)-1;
1932 }
1933 munmap((void *)real_start, real_size);
1934 real_start = HOST_PAGE_ALIGN(real_start);
1935 }
1936 current_start = real_start;
1937 }
1938 naive:
1939 #endif
1940
1941 while (1) {
1942 unsigned long real_start, real_size, aligned_size;
1943 aligned_size = real_size = host_size;
1944
1945 /* Do not use mmap_find_vma here because that is limited to the
1946 * guest address space. We are going to make the
1947 * guest address space fit whatever we're given.
1948 */
1949 real_start = (unsigned long)
1950 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
1951 if (real_start == (unsigned long)-1) {
1952 return (unsigned long)-1;
1953 }
1954
1955 /* Check to see if the address is valid. */
1956 if (host_start && real_start != current_start) {
1957 goto try_again;
1958 }
1959
1960 /* Ensure the address is properly aligned. */
1961 if (real_start & ~qemu_host_page_mask) {
1962 /* Ideally, we adjust like
1963 *
1964 * pages: [ ][ ][ ][ ][ ]
1965 * old: [ real ]
1966 * [ aligned ]
1967 * new: [ real ]
1968 * [ aligned ]
1969 *
1970 * But if there is something else mapped right after it,
1971 * then obviously it won't have room to grow, and the
1972 * kernel will put the new larger real someplace else with
1973 * unknown alignment (if we made it to here, then
1974 * fixed=false). Which is why we grow real by a full page
1975 * size, instead of by part of one; so that even if we get
1976 * moved, we can still guarantee alignment. But this does
1977 * mean that there is a padding of < 1 page both before
1978 * and after the aligned range; the "after" could could
1979 * cause problems for ARM emulation where it could butt in
1980 * to where we need to put the commpage.
1981 */
1982 munmap((void *)real_start, host_size);
1983 real_size = aligned_size + qemu_host_page_size;
1984 real_start = (unsigned long)
1985 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
1986 if (real_start == (unsigned long)-1) {
1987 return (unsigned long)-1;
1988 }
1989 aligned_start = HOST_PAGE_ALIGN(real_start);
1990 } else {
1991 aligned_start = real_start;
1992 }
1993
1994 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
1995 /* On 32-bit ARM, we need to also be able to map the commpage. */
1996 int valid = init_guest_commpage(aligned_start - guest_start,
1997 aligned_size + guest_start);
1998 if (valid == -1) {
1999 munmap((void *)real_start, real_size);
2000 return (unsigned long)-1;
2001 } else if (valid == 0) {
2002 goto try_again;
2003 }
2004 #endif
2005
2006 /* If nothing has said `return -1` or `goto try_again` yet,
2007 * then the address we have is good.
2008 */
2009 break;
2010
2011 try_again:
2012 /* That address didn't work. Unmap and try a different one.
2013 * The address the host picked because is typically right at
2014 * the top of the host address space and leaves the guest with
2015 * no usable address space. Resort to a linear search. We
2016 * already compensated for mmap_min_addr, so this should not
2017 * happen often. Probably means we got unlucky and host
2018 * address space randomization put a shared library somewhere
2019 * inconvenient.
2020 *
2021 * This is probably a good strategy if host_start, but is
2022 * probably a bad strategy if not, which means we got here
2023 * because of trouble with ARM commpage setup.
2024 */
2025 munmap((void *)real_start, real_size);
2026 current_start += qemu_host_page_size;
2027 if (host_start == current_start) {
2028 /* Theoretically possible if host doesn't have any suitably
2029 * aligned areas. Normally the first mmap will fail.
2030 */
2031 return (unsigned long)-1;
2032 }
2033 }
2034
2035 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
2036
2037 return aligned_start;
2038 }
2039
2040 static void probe_guest_base(const char *image_name,
2041 abi_ulong loaddr, abi_ulong hiaddr)
2042 {
2043 /* Probe for a suitable guest base address, if the user has not set
2044 * it explicitly, and set guest_base appropriately.
2045 * In case of error we will print a suitable message and exit.
2046 */
2047 const char *errmsg;
2048 if (!have_guest_base && !reserved_va) {
2049 unsigned long host_start, real_start, host_size;
2050
2051 /* Round addresses to page boundaries. */
2052 loaddr &= qemu_host_page_mask;
2053 hiaddr = HOST_PAGE_ALIGN(hiaddr);
2054
2055 if (loaddr < mmap_min_addr) {
2056 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
2057 } else {
2058 host_start = loaddr;
2059 if (host_start != loaddr) {
2060 errmsg = "Address overflow loading ELF binary";
2061 goto exit_errmsg;
2062 }
2063 }
2064 host_size = hiaddr - loaddr;
2065
2066 /* Setup the initial guest memory space with ranges gleaned from
2067 * the ELF image that is being loaded.
2068 */
2069 real_start = init_guest_space(host_start, host_size, loaddr, false);
2070 if (real_start == (unsigned long)-1) {
2071 errmsg = "Unable to find space for application";
2072 goto exit_errmsg;
2073 }
2074 guest_base = real_start - loaddr;
2075
2076 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
2077 TARGET_ABI_FMT_lx " to 0x%lx\n",
2078 loaddr, real_start);
2079 }
2080 return;
2081
2082 exit_errmsg:
2083 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2084 exit(-1);
2085 }
2086
2087
2088 /* Load an ELF image into the address space.
2089
2090 IMAGE_NAME is the filename of the image, to use in error messages.
2091 IMAGE_FD is the open file descriptor for the image.
2092
2093 BPRM_BUF is a copy of the beginning of the file; this of course
2094 contains the elf file header at offset 0. It is assumed that this
2095 buffer is sufficiently aligned to present no problems to the host
2096 in accessing data at aligned offsets within the buffer.
2097
2098 On return: INFO values will be filled in, as necessary or available. */
2099
2100 static void load_elf_image(const char *image_name, int image_fd,
2101 struct image_info *info, char **pinterp_name,
2102 char bprm_buf[BPRM_BUF_SIZE])
2103 {
2104 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2105 struct elf_phdr *phdr;
2106 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2107 int i, retval;
2108 const char *errmsg;
2109
2110 /* First of all, some simple consistency checks */
2111 errmsg = "Invalid ELF image for this architecture";
2112 if (!elf_check_ident(ehdr)) {
2113 goto exit_errmsg;
2114 }
2115 bswap_ehdr(ehdr);
2116 if (!elf_check_ehdr(ehdr)) {
2117 goto exit_errmsg;
2118 }
2119
2120 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2121 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2122 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
2123 } else {
2124 phdr = (struct elf_phdr *) alloca(i);
2125 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
2126 if (retval != i) {
2127 goto exit_read;
2128 }
2129 }
2130 bswap_phdr(phdr, ehdr->e_phnum);
2131
2132 #ifdef CONFIG_USE_FDPIC
2133 info->nsegs = 0;
2134 info->pt_dynamic_addr = 0;
2135 #endif
2136
2137 mmap_lock();
2138
2139 /* Find the maximum size of the image and allocate an appropriate
2140 amount of memory to handle that. */
2141 loaddr = -1, hiaddr = 0;
2142 for (i = 0; i < ehdr->e_phnum; ++i) {
2143 if (phdr[i].p_type == PT_LOAD) {
2144 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
2145 if (a < loaddr) {
2146 loaddr = a;
2147 }
2148 a = phdr[i].p_vaddr + phdr[i].p_memsz;
2149 if (a > hiaddr) {
2150 hiaddr = a;
2151 }
2152 #ifdef CONFIG_USE_FDPIC
2153 ++info->nsegs;
2154 #endif
2155 }
2156 }
2157
2158 load_addr = loaddr;
2159 if (ehdr->e_type == ET_DYN) {
2160 /* The image indicates that it can be loaded anywhere. Find a
2161 location that can hold the memory space required. If the
2162 image is pre-linked, LOADDR will be non-zero. Since we do
2163 not supply MAP_FIXED here we'll use that address if and
2164 only if it remains available. */
2165 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2166 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2167 -1, 0);
2168 if (load_addr == -1) {
2169 goto exit_perror;
2170 }
2171 } else if (pinterp_name != NULL) {
2172 /* This is the main executable. Make sure that the low
2173 address does not conflict with MMAP_MIN_ADDR or the
2174 QEMU application itself. */
2175 probe_guest_base(image_name, loaddr, hiaddr);
2176 }
2177 load_bias = load_addr - loaddr;
2178
2179 #ifdef CONFIG_USE_FDPIC
2180 {
2181 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
2182 g_malloc(sizeof(*loadsegs) * info->nsegs);
2183
2184 for (i = 0; i < ehdr->e_phnum; ++i) {
2185 switch (phdr[i].p_type) {
2186 case PT_DYNAMIC:
2187 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2188 break;
2189 case PT_LOAD:
2190 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2191 loadsegs->p_vaddr = phdr[i].p_vaddr;
2192 loadsegs->p_memsz = phdr[i].p_memsz;
2193 ++loadsegs;
2194 break;
2195 }
2196 }
2197 }
2198 #endif
2199
2200 info->load_bias = load_bias;
2201 info->load_addr = load_addr;
2202 info->entry = ehdr->e_entry + load_bias;
2203 info->start_code = -1;
2204 info->end_code = 0;
2205 info->start_data = -1;
2206 info->end_data = 0;
2207 info->brk = 0;
2208 info->elf_flags = ehdr->e_flags;
2209
2210 for (i = 0; i < ehdr->e_phnum; i++) {
2211 struct elf_phdr *eppnt = phdr + i;
2212 if (eppnt->p_type == PT_LOAD) {
2213 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
2214 int elf_prot = 0;
2215
2216 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2217 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2218 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
2219
2220 vaddr = load_bias + eppnt->p_vaddr;
2221 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2222 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
2223
2224 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
2225 elf_prot, MAP_PRIVATE | MAP_FIXED,
2226 image_fd, eppnt->p_offset - vaddr_po);
2227 if (error == -1) {
2228 goto exit_perror;
2229 }
2230
2231 vaddr_ef = vaddr + eppnt->p_filesz;
2232 vaddr_em = vaddr + eppnt->p_memsz;
2233
2234 /* If the load segment requests extra zeros (e.g. bss), map it. */
2235 if (vaddr_ef < vaddr_em) {
2236 zero_bss(vaddr_ef, vaddr_em, elf_prot);
2237 }
2238
2239 /* Find the full program boundaries. */
2240 if (elf_prot & PROT_EXEC) {
2241 if (vaddr < info->start_code) {
2242 info->start_code = vaddr;
2243 }
2244 if (vaddr_ef > info->end_code) {
2245 info->end_code = vaddr_ef;
2246 }
2247 }
2248 if (elf_prot & PROT_WRITE) {
2249 if (vaddr < info->start_data) {
2250 info->start_data = vaddr;
2251 }
2252 if (vaddr_ef > info->end_data) {
2253 info->end_data = vaddr_ef;
2254 }
2255 if (vaddr_em > info->brk) {
2256 info->brk = vaddr_em;
2257 }
2258 }
2259 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2260 char *interp_name;
2261
2262 if (*pinterp_name) {
2263 errmsg = "Multiple PT_INTERP entries";
2264 goto exit_errmsg;
2265 }
2266 interp_name = malloc(eppnt->p_filesz);
2267 if (!interp_name) {
2268 goto exit_perror;
2269 }
2270
2271 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2272 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2273 eppnt->p_filesz);
2274 } else {
2275 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2276 eppnt->p_offset);
2277 if (retval != eppnt->p_filesz) {
2278 goto exit_perror;
2279 }
2280 }
2281 if (interp_name[eppnt->p_filesz - 1] != 0) {
2282 errmsg = "Invalid PT_INTERP entry";
2283 goto exit_errmsg;
2284 }
2285 *pinterp_name = interp_name;
2286 }
2287 }
2288
2289 if (info->end_data == 0) {
2290 info->start_data = info->end_code;
2291 info->end_data = info->end_code;
2292 info->brk = info->end_code;
2293 }
2294
2295 if (qemu_log_enabled()) {
2296 load_symbols(ehdr, image_fd, load_bias);
2297 }
2298
2299 mmap_unlock();
2300
2301 close(image_fd);
2302 return;
2303
2304 exit_read:
2305 if (retval >= 0) {
2306 errmsg = "Incomplete read of file header";
2307 goto exit_errmsg;
2308 }
2309 exit_perror:
2310 errmsg = strerror(errno);
2311 exit_errmsg:
2312 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2313 exit(-1);
2314 }
2315
2316 static void load_elf_interp(const char *filename, struct image_info *info,
2317 char bprm_buf[BPRM_BUF_SIZE])
2318 {
2319 int fd, retval;
2320
2321 fd = open(path(filename), O_RDONLY);
2322 if (fd < 0) {
2323 goto exit_perror;
2324 }
2325
2326 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2327 if (retval < 0) {
2328 goto exit_perror;
2329 }
2330 if (retval < BPRM_BUF_SIZE) {
2331 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2332 }
2333
2334 load_elf_image(filename, fd, info, NULL, bprm_buf);
2335 return;
2336
2337 exit_perror:
2338 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2339 exit(-1);
2340 }
2341
2342 static int symfind(const void *s0, const void *s1)
2343 {
2344 target_ulong addr = *(target_ulong *)s0;
2345 struct elf_sym *sym = (struct elf_sym *)s1;
2346 int result = 0;
2347 if (addr < sym->st_value) {
2348 result = -1;
2349 } else if (addr >= sym->st_value + sym->st_size) {
2350 result = 1;
2351 }
2352 return result;
2353 }
2354
2355 static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2356 {
2357 #if ELF_CLASS == ELFCLASS32
2358 struct elf_sym *syms = s->disas_symtab.elf32;
2359 #else
2360 struct elf_sym *syms = s->disas_symtab.elf64;
2361 #endif
2362
2363 // binary search
2364 struct elf_sym *sym;
2365
2366 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
2367 if (sym != NULL) {
2368 return s->disas_strtab + sym->st_name;
2369 }
2370
2371 return "";
2372 }
2373
2374 /* FIXME: This should use elf_ops.h */
2375 static int symcmp(const void *s0, const void *s1)
2376 {
2377 struct elf_sym *sym0 = (struct elf_sym *)s0;
2378 struct elf_sym *sym1 = (struct elf_sym *)s1;
2379 return (sym0->st_value < sym1->st_value)
2380 ? -1
2381 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2382 }
2383
2384 /* Best attempt to load symbols from this ELF object. */
2385 static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
2386 {
2387 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
2388 uint64_t segsz;
2389 struct elf_shdr *shdr;
2390 char *strings = NULL;
2391 struct syminfo *s = NULL;
2392 struct elf_sym *new_syms, *syms = NULL;
2393
2394 shnum = hdr->e_shnum;
2395 i = shnum * sizeof(struct elf_shdr);
2396 shdr = (struct elf_shdr *)alloca(i);
2397 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2398 return;
2399 }
2400
2401 bswap_shdr(shdr, shnum);
2402 for (i = 0; i < shnum; ++i) {
2403 if (shdr[i].sh_type == SHT_SYMTAB) {
2404 sym_idx = i;
2405 str_idx = shdr[i].sh_link;
2406 goto found;
2407 }
2408 }
2409
2410 /* There will be no symbol table if the file was stripped. */
2411 return;
2412
2413 found:
2414 /* Now know where the strtab and symtab are. Snarf them. */
2415 s = g_try_new(struct syminfo, 1);
2416 if (!s) {
2417 goto give_up;
2418 }
2419
2420 segsz = shdr[str_idx].sh_size;
2421 s->disas_strtab = strings = g_try_malloc(segsz);
2422 if (!strings ||
2423 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
2424 goto give_up;
2425 }
2426
2427 segsz = shdr[sym_idx].sh_size;
2428 syms = g_try_malloc(segsz);
2429 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
2430 goto give_up;
2431 }
2432
2433 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2434 /* Implausibly large symbol table: give up rather than ploughing
2435 * on with the number of symbols calculation overflowing
2436 */
2437 goto give_up;
2438 }
2439 nsyms = segsz / sizeof(struct elf_sym);
2440 for (i = 0; i < nsyms; ) {
2441 bswap_sym(syms + i);
2442 /* Throw away entries which we do not need. */
2443 if (syms[i].st_shndx == SHN_UNDEF
2444 || syms[i].st_shndx >= SHN_LORESERVE
2445 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2446 if (i < --nsyms) {
2447 syms[i] = syms[nsyms];
2448 }
2449 } else {
2450 #if defined(TARGET_ARM) || defined (TARGET_MIPS)
2451 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2452 syms[i].st_value &= ~(target_ulong)1;
2453 #endif
2454 syms[i].st_value += load_bias;
2455 i++;
2456 }
2457 }
2458
2459 /* No "useful" symbol. */
2460 if (nsyms == 0) {
2461 goto give_up;
2462 }
2463
2464 /* Attempt to free the storage associated with the local symbols
2465 that we threw away. Whether or not this has any effect on the
2466 memory allocation depends on the malloc implementation and how
2467 many symbols we managed to discard. */
2468 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
2469 if (new_syms == NULL) {
2470 goto give_up;
2471 }
2472 syms = new_syms;
2473
2474 qsort(syms, nsyms, sizeof(*syms), symcmp);
2475
2476 s->disas_num_syms = nsyms;
2477 #if ELF_CLASS == ELFCLASS32
2478 s->disas_symtab.elf32 = syms;
2479 #else
2480 s->disas_symtab.elf64 = syms;
2481 #endif
2482 s->lookup_symbol = lookup_symbolxx;
2483 s->next = syminfos;
2484 syminfos = s;
2485
2486 return;
2487
2488 give_up:
2489 g_free(s);
2490 g_free(strings);
2491 g_free(syms);
2492 }
2493
2494 uint32_t get_elf_eflags(int fd)
2495 {
2496 struct elfhdr ehdr;
2497 off_t offset;
2498 int ret;
2499
2500 /* Read ELF header */
2501 offset = lseek(fd, 0, SEEK_SET);
2502 if (offset == (off_t) -1) {
2503 return 0;
2504 }
2505 ret = read(fd, &ehdr, sizeof(ehdr));
2506 if (ret < sizeof(ehdr)) {
2507 return 0;
2508 }
2509 offset = lseek(fd, offset, SEEK_SET);
2510 if (offset == (off_t) -1) {
2511 return 0;
2512 }
2513
2514 /* Check ELF signature */
2515 if (!elf_check_ident(&ehdr)) {
2516 return 0;
2517 }
2518
2519 /* check header */
2520 bswap_ehdr(&ehdr);
2521 if (!elf_check_ehdr(&ehdr)) {
2522 return 0;
2523 }
2524
2525 /* return architecture id */
2526 return ehdr.e_flags;
2527 }
2528
2529 int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
2530 {
2531 struct image_info interp_info;
2532 struct elfhdr elf_ex;
2533 char *elf_interpreter = NULL;
2534 char *scratch;
2535
2536 info->start_mmap = (abi_ulong)ELF_START_MMAP;
2537
2538 load_elf_image(bprm->filename, bprm->fd, info,
2539 &elf_interpreter, bprm->buf);
2540
2541 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2542 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2543 when we load the interpreter. */
2544 elf_ex = *(struct elfhdr *)bprm->buf;
2545
2546 /* Do this so that we can load the interpreter, if need be. We will
2547 change some of these later */
2548 bprm->p = setup_arg_pages(bprm, info);
2549
2550 scratch = g_new0(char, TARGET_PAGE_SIZE);
2551 if (STACK_GROWS_DOWN) {
2552 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2553 bprm->p, info->stack_limit);
2554 info->file_string = bprm->p;
2555 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2556 bprm->p, info->stack_limit);
2557 info->env_strings = bprm->p;
2558 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2559 bprm->p, info->stack_limit);
2560 info->arg_strings = bprm->p;
2561 } else {
2562 info->arg_strings = bprm->p;
2563 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2564 bprm->p, info->stack_limit);
2565 info->env_strings = bprm->p;
2566 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2567 bprm->p, info->stack_limit);
2568 info->file_string = bprm->p;
2569 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2570 bprm->p, info->stack_limit);
2571 }
2572
2573 g_free(scratch);
2574
2575 if (!bprm->p) {
2576 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2577 exit(-1);
2578 }
2579
2580 if (elf_interpreter) {
2581 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
2582
2583 /* If the program interpreter is one of these two, then assume
2584 an iBCS2 image. Otherwise assume a native linux image. */
2585
2586 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2587 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2588 info->personality = PER_SVR4;
2589
2590 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2591 and some applications "depend" upon this behavior. Since
2592 we do not have the power to recompile these, we emulate
2593 the SVr4 behavior. Sigh. */
2594 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
2595 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
2596 }
2597 }
2598
2599 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2600 info, (elf_interpreter ? &interp_info : NULL));
2601 info->start_stack = bprm->p;
2602
2603 /* If we have an interpreter, set that as the program's entry point.
2604 Copy the load_bias as well, to help PPC64 interpret the entry
2605 point as a function descriptor. Do this after creating elf tables
2606 so that we copy the original program entry point into the AUXV. */
2607 if (elf_interpreter) {
2608 info->load_bias = interp_info.load_bias;
2609 info->entry = interp_info.entry;
2610 free(elf_interpreter);
2611 }
2612
2613 #ifdef USE_ELF_CORE_DUMP
2614 bprm->core_dump = &elf_core_dump;
2615 #endif
2616
2617 return 0;
2618 }
2619
2620 #ifdef USE_ELF_CORE_DUMP
2621 /*
2622 * Definitions to generate Intel SVR4-like core files.
2623 * These mostly have the same names as the SVR4 types with "target_elf_"
2624 * tacked on the front to prevent clashes with linux definitions,
2625 * and the typedef forms have been avoided. This is mostly like
2626 * the SVR4 structure, but more Linuxy, with things that Linux does
2627 * not support and which gdb doesn't really use excluded.
2628 *
2629 * Fields we don't dump (their contents is zero) in linux-user qemu
2630 * are marked with XXX.
2631 *
2632 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2633 *
2634 * Porting ELF coredump for target is (quite) simple process. First you
2635 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
2636 * the target resides):
2637 *
2638 * #define USE_ELF_CORE_DUMP
2639 *
2640 * Next you define type of register set used for dumping. ELF specification
2641 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2642 *
2643 * typedef <target_regtype> target_elf_greg_t;
2644 * #define ELF_NREG <number of registers>
2645 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
2646 *
2647 * Last step is to implement target specific function that copies registers
2648 * from given cpu into just specified register set. Prototype is:
2649 *
2650 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
2651 * const CPUArchState *env);
2652 *
2653 * Parameters:
2654 * regs - copy register values into here (allocated and zeroed by caller)
2655 * env - copy registers from here
2656 *
2657 * Example for ARM target is provided in this file.
2658 */
2659
2660 /* An ELF note in memory */
2661 struct memelfnote {
2662 const char *name;
2663 size_t namesz;
2664 size_t namesz_rounded;
2665 int type;
2666 size_t datasz;
2667 size_t datasz_rounded;
2668 void *data;
2669 size_t notesz;
2670 };
2671
2672 struct target_elf_siginfo {
2673 abi_int si_signo; /* signal number */
2674 abi_int si_code; /* extra code */
2675 abi_int si_errno; /* errno */
2676 };
2677
2678 struct target_elf_prstatus {
2679 struct target_elf_siginfo pr_info; /* Info associated with signal */
2680 abi_short pr_cursig; /* Current signal */
2681 abi_ulong pr_sigpend; /* XXX */
2682 abi_ulong pr_sighold; /* XXX */
2683 target_pid_t pr_pid;
2684 target_pid_t pr_ppid;
2685 target_pid_t pr_pgrp;
2686 target_pid_t pr_sid;
2687 struct target_timeval pr_utime; /* XXX User time */
2688 struct target_timeval pr_stime; /* XXX System time */
2689 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2690 struct target_timeval pr_cstime; /* XXX Cumulative system time */
2691 target_elf_gregset_t pr_reg; /* GP registers */
2692 abi_int pr_fpvalid; /* XXX */
2693 };
2694
2695 #define ELF_PRARGSZ (80) /* Number of chars for args */
2696
2697 struct target_elf_prpsinfo {
2698 char pr_state; /* numeric process state */
2699 char pr_sname; /* char for pr_state */
2700 char pr_zomb; /* zombie */
2701 char pr_nice; /* nice val */
2702 abi_ulong pr_flag; /* flags */
2703 target_uid_t pr_uid;
2704 target_gid_t pr_gid;
2705 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
2706 /* Lots missing */
2707 char pr_fname[16]; /* filename of executable */
2708 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2709 };
2710
2711 /* Here is the structure in which status of each thread is captured. */
2712 struct elf_thread_status {
2713 QTAILQ_ENTRY(elf_thread_status) ets_link;
2714 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
2715 #if 0
2716 elf_fpregset_t fpu; /* NT_PRFPREG */
2717 struct task_struct *thread;
2718 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2719 #endif
2720 struct memelfnote notes[1];
2721 int num_notes;
2722 };
2723
2724 struct elf_note_info {
2725 struct memelfnote *notes;
2726 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2727 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
2728
2729 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
2730 #if 0
2731 /*
2732 * Current version of ELF coredump doesn't support
2733 * dumping fp regs etc.
2734 */
2735 elf_fpregset_t *fpu;
2736 elf_fpxregset_t *xfpu;
2737 int thread_status_size;
2738 #endif
2739 int notes_size;
2740 int numnote;
2741 };
2742
2743 struct vm_area_struct {
2744 target_ulong vma_start; /* start vaddr of memory region */
2745 target_ulong vma_end; /* end vaddr of memory region */
2746 abi_ulong vma_flags; /* protection etc. flags for the region */
2747 QTAILQ_ENTRY(vm_area_struct) vma_link;
2748 };
2749
2750 struct mm_struct {
2751 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
2752 int mm_count; /* number of mappings */
2753 };
2754
2755 static struct mm_struct *vma_init(void);
2756 static void vma_delete(struct mm_struct *);
2757 static int vma_add_mapping(struct mm_struct *, target_ulong,
2758 target_ulong, abi_ulong);
2759 static int vma_get_mapping_count(const struct mm_struct *);
2760 static struct vm_area_struct *vma_first(const struct mm_struct *);
2761 static struct vm_area_struct *vma_next(struct vm_area_struct *);
2762 static abi_ulong vma_dump_size(const struct vm_area_struct *);
2763 static int vma_walker(void *priv, target_ulong start, target_ulong end,
2764 unsigned long flags);
2765
2766 static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2767 static void fill_note(struct memelfnote *, const char *, int,
2768 unsigned int, void *);
2769 static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2770 static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
2771 static void fill_auxv_note(struct memelfnote *, const TaskState *);
2772 static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2773 static size_t note_size(const struct memelfnote *);
2774 static void free_note_info(struct elf_note_info *);
2775 static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2776 static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
2777 static int core_dump_filename(const TaskState *, char *, size_t);
2778
2779 static int dump_write(int, const void *, size_t);
2780 static int write_note(struct memelfnote *, int);
2781 static int write_note_info(struct elf_note_info *, int);
2782
2783 #ifdef BSWAP_NEEDED
2784 static void bswap_prstatus(struct target_elf_prstatus *prstatus)
2785 {
2786 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2787 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2788 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
2789 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
2790 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2791 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
2792 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2793 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2794 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2795 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2796 /* cpu times are not filled, so we skip them */
2797 /* regs should be in correct format already */
2798 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2799 }
2800
2801 static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
2802 {
2803 psinfo->pr_flag = tswapal(psinfo->pr_flag);
2804 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2805 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2806 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2807 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2808 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2809 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2810 }
2811
2812 static void bswap_note(struct elf_note *en)
2813 {
2814 bswap32s(&en->n_namesz);
2815 bswap32s(&en->n_descsz);
2816 bswap32s(&en->n_type);
2817 }
2818 #else
2819 static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2820 static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2821 static inline void bswap_note(struct elf_note *en) { }
2822 #endif /* BSWAP_NEEDED */
2823
2824 /*
2825 * Minimal support for linux memory regions. These are needed
2826 * when we are finding out what memory exactly belongs to
2827 * emulated process. No locks needed here, as long as
2828 * thread that received the signal is stopped.
2829 */
2830
2831 static struct mm_struct *vma_init(void)
2832 {
2833 struct mm_struct *mm;
2834
2835 if ((mm = g_malloc(sizeof (*mm))) == NULL)
2836 return (NULL);
2837
2838 mm->mm_count = 0;
2839 QTAILQ_INIT(&mm->mm_mmap);
2840
2841 return (mm);
2842 }
2843
2844 static void vma_delete(struct mm_struct *mm)
2845 {
2846 struct vm_area_struct *vma;
2847
2848 while ((vma = vma_first(mm)) != NULL) {
2849 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
2850 g_free(vma);
2851 }
2852 g_free(mm);
2853 }
2854
2855 static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
2856 target_ulong end, abi_ulong flags)
2857 {
2858 struct vm_area_struct *vma;
2859
2860 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
2861 return (-1);
2862
2863 vma->vma_start = start;
2864 vma->vma_end = end;
2865 vma->vma_flags = flags;
2866
2867 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
2868 mm->mm_count++;
2869
2870 return (0);
2871 }
2872
2873 static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2874 {
2875 return (QTAILQ_FIRST(&mm->mm_mmap));
2876 }
2877
2878 static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2879 {
2880 return (QTAILQ_NEXT(vma, vma_link));
2881 }
2882
2883 static int vma_get_mapping_count(const struct mm_struct *mm)
2884 {
2885 return (mm->mm_count);
2886 }
2887
2888 /*
2889 * Calculate file (dump) size of given memory region.
2890 */
2891 static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2892 {
2893 /* if we cannot even read the first page, skip it */
2894 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2895 return (0);
2896
2897 /*
2898 * Usually we don't dump executable pages as they contain
2899 * non-writable code that debugger can read directly from
2900 * target library etc. However, thread stacks are marked
2901 * also executable so we read in first page of given region
2902 * and check whether it contains elf header. If there is
2903 * no elf header, we dump it.
2904 */
2905 if (vma->vma_flags & PROT_EXEC) {
2906 char page[TARGET_PAGE_SIZE];
2907
2908 copy_from_user(page, vma->vma_start, sizeof (page));
2909 if ((page[EI_MAG0] == ELFMAG0) &&
2910 (page[EI_MAG1] == ELFMAG1) &&
2911 (page[EI_MAG2] == ELFMAG2) &&
2912 (page[EI_MAG3] == ELFMAG3)) {
2913 /*
2914 * Mappings are possibly from ELF binary. Don't dump
2915 * them.
2916 */
2917 return (0);
2918 }
2919 }
2920
2921 return (vma->vma_end - vma->vma_start);
2922 }
2923
2924 static int vma_walker(void *priv, target_ulong start, target_ulong end,
2925 unsigned long flags)
2926 {
2927 struct mm_struct *mm = (struct mm_struct *)priv;
2928
2929 vma_add_mapping(mm, start, end, flags);
2930 return (0);
2931 }
2932
2933 static void fill_note(struct memelfnote *note, const char *name, int type,
2934 unsigned int sz, void *data)
2935 {
2936 unsigned int namesz;
2937
2938 namesz = strlen(name) + 1;
2939 note->name = name;
2940 note->namesz = namesz;
2941 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2942 note->type = type;
2943 note->datasz = sz;
2944 note->datasz_rounded = roundup(sz, sizeof (int32_t));
2945
2946 note->data = data;
2947
2948 /*
2949 * We calculate rounded up note size here as specified by
2950 * ELF document.
2951 */
2952 note->notesz = sizeof (struct elf_note) +
2953 note->namesz_rounded + note->datasz_rounded;
2954 }
2955
2956 static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
2957 uint32_t flags)
2958 {
2959 (void) memset(elf, 0, sizeof(*elf));
2960
2961 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2962 elf->e_ident[EI_CLASS] = ELF_CLASS;
2963 elf->e_ident[EI_DATA] = ELF_DATA;
2964 elf->e_ident[EI_VERSION] = EV_CURRENT;
2965 elf->e_ident[EI_OSABI] = ELF_OSABI;
2966
2967 elf->e_type = ET_CORE;
2968 elf->e_machine = machine;
2969 elf->e_version = EV_CURRENT;
2970 elf->e_phoff = sizeof(struct elfhdr);
2971 elf->e_flags = flags;
2972 elf->e_ehsize = sizeof(struct elfhdr);
2973 elf->e_phentsize = sizeof(struct elf_phdr);
2974 elf->e_phnum = segs;
2975
2976 bswap_ehdr(elf);
2977 }
2978
2979 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2980 {
2981 phdr->p_type = PT_NOTE;
2982 phdr->p_offset = offset;
2983 phdr->p_vaddr = 0;
2984 phdr->p_paddr = 0;
2985 phdr->p_filesz = sz;
2986 phdr->p_memsz = 0;
2987 phdr->p_flags = 0;
2988 phdr->p_align = 0;
2989
2990 bswap_phdr(phdr, 1);
2991 }
2992
2993 static size_t note_size(const struct memelfnote *note)
2994 {
2995 return (note->notesz);
2996 }
2997
2998 static void fill_prstatus(struct target_elf_prstatus *prstatus,
2999 const TaskState *ts, int signr)
3000 {
3001 (void) memset(prstatus, 0, sizeof (*prstatus));
3002 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3003 prstatus->pr_pid = ts->ts_tid;
3004 prstatus->pr_ppid = getppid();
3005 prstatus->pr_pgrp = getpgrp();
3006 prstatus->pr_sid = getsid(0);
3007
3008 bswap_prstatus(prstatus);
3009 }
3010
3011 static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
3012 {
3013 char *base_filename;
3014 unsigned int i, len;
3015
3016 (void) memset(psinfo, 0, sizeof (*psinfo));
3017
3018 len = ts->info->arg_end - ts->info->arg_start;
3019 if (len >= ELF_PRARGSZ)
3020 len = ELF_PRARGSZ - 1;
3021 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
3022 return -EFAULT;
3023 for (i = 0; i < len; i++)
3024 if (psinfo->pr_psargs[i] == 0)
3025 psinfo->pr_psargs[i] = ' ';
3026 psinfo->pr_psargs[len] = 0;
3027
3028 psinfo->pr_pid = getpid();
3029 psinfo->pr_ppid = getppid();
3030 psinfo->pr_pgrp = getpgrp();
3031 psinfo->pr_sid = getsid(0);
3032 psinfo->pr_uid = getuid();
3033 psinfo->pr_gid = getgid();
3034
3035 base_filename = g_path_get_basename(ts->bprm->filename);
3036 /*
3037 * Using strncpy here is fine: at max-length,
3038 * this field is not NUL-terminated.
3039 */
3040 (void) strncpy(psinfo->pr_fname, base_filename,
3041 sizeof(psinfo->pr_fname));
3042
3043 g_free(base_filename);
3044 bswap_psinfo(psinfo);
3045 return (0);
3046 }
3047
3048 static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3049 {
3050 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3051 elf_addr_t orig_auxv = auxv;
3052 void *ptr;
3053 int len = ts->info->auxv_len;
3054
3055 /*
3056 * Auxiliary vector is stored in target process stack. It contains
3057 * {type, value} pairs that we need to dump into note. This is not
3058 * strictly necessary but we do it here for sake of completeness.
3059 */
3060
3061 /* read in whole auxv vector and copy it to memelfnote */
3062 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3063 if (ptr != NULL) {
3064 fill_note(note, "CORE", NT_AUXV, len, ptr);
3065 unlock_user(ptr, auxv, len);
3066 }
3067 }
3068
3069 /*
3070 * Constructs name of coredump file. We have following convention
3071 * for the name:
3072 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3073 *
3074 * Returns 0 in case of success, -1 otherwise (errno is set).
3075 */
3076 static int core_dump_filename(const TaskState *ts, char *buf,
3077 size_t bufsize)
3078 {
3079 char timestamp[64];
3080 char *base_filename = NULL;
3081 struct timeval tv;
3082 struct tm tm;
3083
3084 assert(bufsize >= PATH_MAX);
3085
3086 if (gettimeofday(&tv, NULL) < 0) {
3087 (void) fprintf(stderr, "unable to get current timestamp: %s",
3088 strerror(errno));
3089 return (-1);
3090 }
3091
3092 base_filename = g_path_get_basename(ts->bprm->filename);
3093 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
3094 localtime_r(&tv.tv_sec, &tm));
3095 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
3096 base_filename, timestamp, (int)getpid());
3097 g_free(base_filename);
3098
3099 return (0);
3100 }
3101
3102 static int dump_write(int fd, const void *ptr, size_t size)
3103 {
3104 const char *bufp = (const char *)ptr;
3105 ssize_t bytes_written, bytes_left;
3106 struct rlimit dumpsize;
3107 off_t pos;
3108
3109 bytes_written = 0;
3110 getrlimit(RLIMIT_CORE, &dumpsize);
3111 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3112 if (errno == ESPIPE) { /* not a seekable stream */
3113 bytes_left = size;
3114 } else {
3115 return pos;
3116 }
3117 } else {
3118 if (dumpsize.rlim_cur <= pos) {
3119 return -1;
3120 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3121 bytes_left = size;
3122 } else {
3123 size_t limit_left=dumpsize.rlim_cur - pos;
3124 bytes_left = limit_left >= size ? size : limit_left ;
3125 }
3126 }
3127
3128 /*
3129 * In normal conditions, single write(2) should do but
3130 * in case of socket etc. this mechanism is more portable.
3131 */
3132 do {
3133 bytes_written = write(fd, bufp, bytes_left);
3134 if (bytes_written < 0) {
3135 if (errno == EINTR)
3136 continue;
3137 return (-1);
3138 } else if (bytes_written == 0) { /* eof */
3139 return (-1);
3140 }
3141 bufp += bytes_written;
3142 bytes_left -= bytes_written;
3143 } while (bytes_left > 0);
3144
3145 return (0);
3146 }
3147
3148 static int write_note(struct memelfnote *men, int fd)
3149 {
3150 struct elf_note en;
3151
3152 en.n_namesz = men->namesz;
3153 en.n_type = men->type;
3154 en.n_descsz = men->datasz;
3155
3156 bswap_note(&en);
3157
3158 if (dump_write(fd, &en, sizeof(en)) != 0)
3159 return (-1);
3160 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3161 return (-1);
3162 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
3163 return (-1);
3164
3165 return (0);
3166 }
3167
3168 static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
3169 {
3170 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3171 TaskState *ts = (TaskState *)cpu->opaque;
3172 struct elf_thread_status *ets;
3173
3174 ets = g_malloc0(sizeof (*ets));
3175 ets->num_notes = 1; /* only prstatus is dumped */
3176 fill_prstatus(&ets->prstatus, ts, 0);
3177 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3178 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
3179 &ets->prstatus);
3180
3181 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
3182
3183 info->notes_size += note_size(&ets->notes[0]);
3184 }
3185
3186 static void init_note_info(struct elf_note_info *info)
3187 {
3188 /* Initialize the elf_note_info structure so that it is at
3189 * least safe to call free_note_info() on it. Must be
3190 * called before calling fill_note_info().
3191 */
3192 memset(info, 0, sizeof (*info));
3193 QTAILQ_INIT(&info->thread_list);
3194 }
3195
3196 static int fill_note_info(struct elf_note_info *info,
3197 long signr, const CPUArchState *env)
3198 {
3199 #define NUMNOTES 3
3200 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3201 TaskState *ts = (TaskState *)cpu->opaque;
3202 int i;
3203
3204 info->notes = g_new0(struct memelfnote, NUMNOTES);
3205 if (info->notes == NULL)
3206 return (-ENOMEM);
3207 info->prstatus = g_malloc0(sizeof (*info->prstatus));
3208 if (info->prstatus == NULL)
3209 return (-ENOMEM);
3210 info->psinfo = g_malloc0(sizeof (*info->psinfo));
3211 if (info->prstatus == NULL)
3212 return (-ENOMEM);
3213
3214 /*
3215 * First fill in status (and registers) of current thread
3216 * including process info & aux vector.
3217 */
3218 fill_prstatus(info->prstatus, ts, signr);
3219 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3220 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
3221 sizeof (*info->prstatus), info->prstatus);
3222 fill_psinfo(info->psinfo, ts);
3223 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
3224 sizeof (*info->psinfo), info->psinfo);
3225 fill_auxv_note(&info->notes[2], ts);
3226 info->numnote = 3;
3227
3228 info->notes_size = 0;
3229 for (i = 0; i < info->numnote; i++)
3230 info->notes_size += note_size(&info->notes[i]);
3231
3232 /* read and fill status of all threads */
3233 cpu_list_lock();
3234 CPU_FOREACH(cpu) {
3235 if (cpu == thread_cpu) {
3236 continue;
3237 }
3238 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
3239 }
3240 cpu_list_unlock();
3241
3242 return (0);
3243 }
3244
3245 static void free_note_info(struct elf_note_info *info)
3246 {
3247 struct elf_thread_status *ets;
3248
3249 while (!QTAILQ_EMPTY(&info->thread_list)) {
3250 ets = QTAILQ_FIRST(&info->thread_list);
3251 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
3252 g_free(ets);
3253 }
3254
3255 g_free(info->prstatus);
3256 g_free(info->psinfo);
3257 g_free(info->notes);
3258 }
3259
3260 static int write_note_info(struct elf_note_info *info, int fd)
3261 {
3262 struct elf_thread_status *ets;
3263 int i, error = 0;
3264
3265 /* write prstatus, psinfo and auxv for current thread */
3266 for (i = 0; i < info->numnote; i++)
3267 if ((error = write_note(&info->notes[i], fd)) != 0)
3268 return (error);
3269
3270 /* write prstatus for each thread */
3271 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
3272 if ((error = write_note(&ets->notes[0], fd)) != 0)
3273 return (error);
3274 }
3275
3276 return (0);
3277 }
3278
3279 /*
3280 * Write out ELF coredump.
3281 *
3282 * See documentation of ELF object file format in:
3283 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3284 *
3285 * Coredump format in linux is following:
3286 *
3287 * 0 +----------------------+ \
3288 * | ELF header | ET_CORE |
3289 * +----------------------+ |
3290 * | ELF program headers | |--- headers
3291 * | - NOTE section | |
3292 * | - PT_LOAD sections | |
3293 * +----------------------+ /
3294 * | NOTEs: |
3295 * | - NT_PRSTATUS |
3296 * | - NT_PRSINFO |
3297 * | - NT_AUXV |
3298 * +----------------------+ <-- aligned to target page
3299 * | Process memory dump |
3300 * : :
3301 * . .
3302 * : :
3303 * | |
3304 * +----------------------+
3305 *
3306 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3307 * NT_PRSINFO -> struct elf_prpsinfo
3308 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3309 *
3310 * Format follows System V format as close as possible. Current
3311 * version limitations are as follows:
3312 * - no floating point registers are dumped
3313 *
3314 * Function returns 0 in case of success, negative errno otherwise.
3315 *
3316 * TODO: make this work also during runtime: it should be
3317 * possible to force coredump from running process and then
3318 * continue processing. For example qemu could set up SIGUSR2
3319 * handler (provided that target process haven't registered
3320 * handler for that) that does the dump when signal is received.
3321 */
3322 static int elf_core_dump(int signr, const CPUArchState *env)
3323 {
3324 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3325 const TaskState *ts = (const TaskState *)cpu->opaque;
3326 struct vm_area_struct *vma = NULL;
3327 char corefile[PATH_MAX];
3328 struct elf_note_info info;
3329 struct elfhdr elf;
3330 struct elf_phdr phdr;
3331 struct rlimit dumpsize;
3332 struct mm_struct *mm = NULL;
3333 off_t offset = 0, data_offset = 0;
3334 int segs = 0;
3335 int fd = -1;
3336
3337 init_note_info(&info);
3338
3339 errno = 0;
3340 getrlimit(RLIMIT_CORE, &dumpsize);
3341 if (dumpsize.rlim_cur == 0)
3342 return 0;
3343
3344 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3345 return (-errno);
3346
3347 if ((fd = open(corefile, O_WRONLY | O_CREAT,
3348 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
3349 return (-errno);
3350
3351 /*
3352 * Walk through target process memory mappings and
3353 * set up structure containing this information. After
3354 * this point vma_xxx functions can be used.
3355 */
3356 if ((mm = vma_init()) == NULL)
3357 goto out;
3358
3359 walk_memory_regions(mm, vma_walker);
3360 segs = vma_get_mapping_count(mm);
3361
3362 /*
3363 * Construct valid coredump ELF header. We also
3364 * add one more segment for notes.
3365 */
3366 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3367 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3368 goto out;
3369
3370 /* fill in the in-memory version of notes */
3371 if (fill_note_info(&info, signr, env) < 0)
3372 goto out;
3373
3374 offset += sizeof (elf); /* elf header */
3375 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3376
3377 /* write out notes program header */
3378 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3379
3380 offset += info.notes_size;
3381 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3382 goto out;
3383
3384 /*
3385 * ELF specification wants data to start at page boundary so
3386 * we align it here.
3387 */
3388 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
3389
3390 /*
3391 * Write program headers for memory regions mapped in
3392 * the target process.
3393 */
3394 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3395 (void) memset(&phdr, 0, sizeof (phdr));
3396
3397 phdr.p_type = PT_LOAD;
3398 phdr.p_offset = offset;
3399 phdr.p_vaddr = vma->vma_start;
3400 phdr.p_paddr = 0;
3401 phdr.p_filesz = vma_dump_size(vma);
3402 offset += phdr.p_filesz;
3403 phdr.p_memsz = vma->vma_end - vma->vma_start;
3404 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3405 if (vma->vma_flags & PROT_WRITE)
3406 phdr.p_flags |= PF_W;
3407 if (vma->vma_flags & PROT_EXEC)
3408 phdr.p_flags |= PF_X;
3409 phdr.p_align = ELF_EXEC_PAGESIZE;
3410
3411 bswap_phdr(&phdr, 1);
3412 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3413 goto out;
3414 }
3415 }
3416
3417 /*
3418 * Next we write notes just after program headers. No
3419 * alignment needed here.
3420 */
3421 if (write_note_info(&info, fd) < 0)
3422 goto out;
3423
3424 /* align data to page boundary */
3425 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3426 goto out;
3427
3428 /*
3429 * Finally we can dump process memory into corefile as well.
3430 */
3431 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3432 abi_ulong addr;
3433 abi_ulong end;
3434
3435 end = vma->vma_start + vma_dump_size(vma);
3436
3437 for (addr = vma->vma_start; addr < end;
3438 addr += TARGET_PAGE_SIZE) {
3439 char page[TARGET_PAGE_SIZE];
3440 int error;
3441
3442 /*
3443 * Read in page from target process memory and
3444 * write it to coredump file.
3445 */
3446 error = copy_from_user(page, addr, sizeof (page));
3447 if (error != 0) {
3448 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
3449 addr);
3450 errno = -error;
3451 goto out;
3452 }
3453 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3454 goto out;
3455 }
3456 }
3457
3458 out:
3459 free_note_info(&info);
3460 if (mm != NULL)
3461 vma_delete(mm);
3462 (void) close(fd);
3463
3464 if (errno != 0)
3465 return (-errno);
3466 return (0);
3467 }
3468 #endif /* USE_ELF_CORE_DUMP */
3469
3470 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3471 {
3472 init_thread(regs, infop);
3473 }
AR7 emulation for QEMU