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target-arm: A64: Implement two-register SHA instructions
[qemu.git] / linux-user / elfload.c
CommitLineData
31e31b8a 1/* This is the Linux kernel elf-loading code, ported into user space */
edf8e2af
MW		 2#include <sys/time.h>
3#include <sys/param.h>
31e31b8a
FB		 4
5#include <stdio.h>
6#include <sys/types.h>
7#include <fcntl.h>
31e31b8a
FB		 8#include <errno.h>
9#include <unistd.h>
10#include <sys/mman.h>
edf8e2af 11#include <sys/resource.h>
31e31b8a
FB		 12#include <stdlib.h>
13#include <string.h>
edf8e2af 14#include <time.h>
31e31b8a 15
3ef693a0 16#include "qemu.h"
76cad711 17#include "disas/disas.h"
31e31b8a 18
e58ffeb3 19#ifdef _ARCH_PPC64
a6cc84f4 20#undef ARCH_DLINFO
21#undef ELF_PLATFORM
22#undef ELF_HWCAP
ad6919dc 23#undef ELF_HWCAP2
a6cc84f4 24#undef ELF_CLASS
25#undef ELF_DATA
26#undef ELF_ARCH
27#endif
28
edf8e2af
MW		 29#define ELF_OSABI ELFOSABI_SYSV
30
cb33da57
BS		 31/* from personality.h */
32
33/*
34 * Flags for bug emulation.
35 *
36 * These occupy the top three bytes.
37 */
38enum {
d97ef72e
RH		 39 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
40 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
41 descriptors (signal handling) */
42 MMAP_PAGE_ZERO = 0x0100000,
43 ADDR_COMPAT_LAYOUT = 0x0200000,
44 READ_IMPLIES_EXEC = 0x0400000,
45 ADDR_LIMIT_32BIT = 0x0800000,
46 SHORT_INODE = 0x1000000,
47 WHOLE_SECONDS = 0x2000000,
48 STICKY_TIMEOUTS = 0x4000000,
49 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 50};
51
52/*
53 * Personality types.
54 *
55 * These go in the low byte. Avoid using the top bit, it will
56 * conflict with error returns.
57 */
58enum {
d97ef72e
RH		 59 PER_LINUX = 0x0000,
60 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
61 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
62 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
63 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
64 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
65 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
66 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
67 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
68 PER_BSD = 0x0006,
69 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
70 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
71 PER_LINUX32 = 0x0008,
72 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
73 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
74 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
75 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
76 PER_RISCOS = 0x000c,
77 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
78 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
79 PER_OSF4 = 0x000f, /* OSF/1 v4 */
80 PER_HPUX = 0x0010,
81 PER_MASK = 0x00ff,
cb33da57
BS		 82};
83
84/*
85 * Return the base personality without flags.
86 */
d97ef72e 87#define personality(pers) (pers & PER_MASK)
cb33da57 88
83fb7adf
FB		 89/* this flag is uneffective under linux too, should be deleted */
90#ifndef MAP_DENYWRITE
91#define MAP_DENYWRITE 0
92#endif
93
94/* should probably go in elf.h */
95#ifndef ELIBBAD
96#define ELIBBAD 80
97#endif
98
28490231
RH		 99#ifdef TARGET_WORDS_BIGENDIAN
100#define ELF_DATA ELFDATA2MSB
101#else
102#define ELF_DATA ELFDATA2LSB
103#endif
104
a29f998d 105#ifdef TARGET_ABI_MIPSN32
918fc54c
PB		 106typedef abi_ullong target_elf_greg_t;
107#define tswapreg(ptr) tswap64(ptr)
a29f998d
PB		 108#else
109typedef abi_ulong target_elf_greg_t;
110#define tswapreg(ptr) tswapal(ptr)
111#endif
112
21e807fa 113#ifdef USE_UID16
1ddd592f
PB		 114typedef abi_ushort target_uid_t;
115typedef abi_ushort target_gid_t;
21e807fa 116#else
f8fd4fc4
PB		 117typedef abi_uint target_uid_t;
118typedef abi_uint target_gid_t;
21e807fa 119#endif
f8fd4fc4 120typedef abi_int target_pid_t;
21e807fa 121
30ac07d4
FB		 122#ifdef TARGET_I386
123
15338fd7
FB		 124#define ELF_PLATFORM get_elf_platform()
125
126static const char *get_elf_platform(void)
127{
128 static char elf_platform[] = "i386";
a2247f8e 129 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
15338fd7
FB		 130 if (family > 6)
131 family = 6;
132 if (family >= 3)
133 elf_platform[1] = '0' + family;
134 return elf_platform;
135}
136
137#define ELF_HWCAP get_elf_hwcap()
138
139static uint32_t get_elf_hwcap(void)
140{
a2247f8e
AF		 141 X86CPU *cpu = X86_CPU(thread_cpu);
142
143 return cpu->env.features[FEAT_1_EDX];
15338fd7
FB		 144}
145
84409ddb
JM		 146#ifdef TARGET_X86_64
147#define ELF_START_MMAP 0x2aaaaab000ULL
148#define elf_check_arch(x) ( ((x) == ELF_ARCH) )
149
150#define ELF_CLASS ELFCLASS64
84409ddb
JM		 151#define ELF_ARCH EM_X86_64
152
153static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
154{
155 regs->rax = 0;
156 regs->rsp = infop->start_stack;
157 regs->rip = infop->entry;
158}
159
9edc5d79 160#define ELF_NREG 27
c227f099 161typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 162
163/*
164 * Note that ELF_NREG should be 29 as there should be place for
165 * TRAPNO and ERR "registers" as well but linux doesn't dump
166 * those.
167 *
168 * See linux kernel: arch/x86/include/asm/elf.h
169 */
05390248 170static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 171{
172 (*regs)[0] = env->regs[15];
173 (*regs)[1] = env->regs[14];
174 (*regs)[2] = env->regs[13];
175 (*regs)[3] = env->regs[12];
176 (*regs)[4] = env->regs[R_EBP];
177 (*regs)[5] = env->regs[R_EBX];
178 (*regs)[6] = env->regs[11];
179 (*regs)[7] = env->regs[10];
180 (*regs)[8] = env->regs[9];
181 (*regs)[9] = env->regs[8];
182 (*regs)[10] = env->regs[R_EAX];
183 (*regs)[11] = env->regs[R_ECX];
184 (*regs)[12] = env->regs[R_EDX];
185 (*regs)[13] = env->regs[R_ESI];
186 (*regs)[14] = env->regs[R_EDI];
187 (*regs)[15] = env->regs[R_EAX]; /* XXX */
188 (*regs)[16] = env->eip;
189 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
190 (*regs)[18] = env->eflags;
191 (*regs)[19] = env->regs[R_ESP];
192 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
193 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
194 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
195 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
196 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
197 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
198 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
199}
200
84409ddb
JM		 201#else
202
30ac07d4
FB		 203#define ELF_START_MMAP 0x80000000
204
30ac07d4
FB		 205/*
206 * This is used to ensure we don't load something for the wrong architecture.
207 */
208#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
209
210/*
211 * These are used to set parameters in the core dumps.
212 */
d97ef72e 213#define ELF_CLASS ELFCLASS32
d97ef72e 214#define ELF_ARCH EM_386
30ac07d4 215
d97ef72e
RH		 216static inline void init_thread(struct target_pt_regs *regs,
217 struct image_info *infop)
b346ff46
FB		 218{
219 regs->esp = infop->start_stack;
220 regs->eip = infop->entry;
e5fe0c52
PB		 221
222 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
223 starts %edx contains a pointer to a function which might be
224 registered using `atexit'. This provides a mean for the
225 dynamic linker to call DT_FINI functions for shared libraries
226 that have been loaded before the code runs.
227
228 A value of 0 tells we have no such handler. */
229 regs->edx = 0;
b346ff46 230}
9edc5d79 231
9edc5d79 232#define ELF_NREG 17
c227f099 233typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 234
235/*
236 * Note that ELF_NREG should be 19 as there should be place for
237 * TRAPNO and ERR "registers" as well but linux doesn't dump
238 * those.
239 *
240 * See linux kernel: arch/x86/include/asm/elf.h
241 */
05390248 242static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 243{
244 (*regs)[0] = env->regs[R_EBX];
245 (*regs)[1] = env->regs[R_ECX];
246 (*regs)[2] = env->regs[R_EDX];
247 (*regs)[3] = env->regs[R_ESI];
248 (*regs)[4] = env->regs[R_EDI];
249 (*regs)[5] = env->regs[R_EBP];
250 (*regs)[6] = env->regs[R_EAX];
251 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
252 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
253 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
254 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
255 (*regs)[11] = env->regs[R_EAX]; /* XXX */
256 (*regs)[12] = env->eip;
257 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
258 (*regs)[14] = env->eflags;
259 (*regs)[15] = env->regs[R_ESP];
260 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
261}
84409ddb 262#endif
b346ff46 263
9edc5d79 264#define USE_ELF_CORE_DUMP
d97ef72e 265#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 266
267#endif
268
269#ifdef TARGET_ARM
270
24e76ff0
PM		 271#ifndef TARGET_AARCH64
272/* 32 bit ARM definitions */
273
b346ff46
FB		 274#define ELF_START_MMAP 0x80000000
275
99033cae 276#define elf_check_arch(x) ((x) == ELF_MACHINE)
b346ff46 277
99033cae 278#define ELF_ARCH ELF_MACHINE
d97ef72e 279#define ELF_CLASS ELFCLASS32
b346ff46 280
d97ef72e
RH		 281static inline void init_thread(struct target_pt_regs *regs,
282 struct image_info *infop)
b346ff46 283{
992f48a0 284 abi_long stack = infop->start_stack;
b346ff46 285 memset(regs, 0, sizeof(*regs));
99033cae 286
b346ff46 287 regs->ARM_cpsr = 0x10;
0240ded8 288 if (infop->entry & 1)
d97ef72e 289 regs->ARM_cpsr |= CPSR_T;
0240ded8 290 regs->ARM_pc = infop->entry & 0xfffffffe;
b346ff46 291 regs->ARM_sp = infop->start_stack;
2f619698
FB		 292 /* FIXME - what to for failure of get_user()? */
293 get_user_ual(regs->ARM_r2, stack + 8); /* envp */
294 get_user_ual(regs->ARM_r1, stack + 4); /* envp */
a1516e92 295 /* XXX: it seems that r0 is zeroed after ! */
e5fe0c52
PB		 296 regs->ARM_r0 = 0;
297 /* For uClinux PIC binaries. */
863cf0b7 298 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
e5fe0c52 299 regs->ARM_r10 = infop->start_data;
b346ff46
FB		 300}
301
edf8e2af 302#define ELF_NREG 18
c227f099 303typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 304
05390248 305static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
edf8e2af 306{
86cd7b2d
PB		 307 (*regs)[0] = tswapreg(env->regs[0]);
308 (*regs)[1] = tswapreg(env->regs[1]);
309 (*regs)[2] = tswapreg(env->regs[2]);
310 (*regs)[3] = tswapreg(env->regs[3]);
311 (*regs)[4] = tswapreg(env->regs[4]);
312 (*regs)[5] = tswapreg(env->regs[5]);
313 (*regs)[6] = tswapreg(env->regs[6]);
314 (*regs)[7] = tswapreg(env->regs[7]);
315 (*regs)[8] = tswapreg(env->regs[8]);
316 (*regs)[9] = tswapreg(env->regs[9]);
317 (*regs)[10] = tswapreg(env->regs[10]);
318 (*regs)[11] = tswapreg(env->regs[11]);
319 (*regs)[12] = tswapreg(env->regs[12]);
320 (*regs)[13] = tswapreg(env->regs[13]);
321 (*regs)[14] = tswapreg(env->regs[14]);
322 (*regs)[15] = tswapreg(env->regs[15]);
323
324 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
325 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
edf8e2af
MW		 326}
327
30ac07d4 328#define USE_ELF_CORE_DUMP
d97ef72e 329#define ELF_EXEC_PAGESIZE 4096
30ac07d4 330
afce2927
FB		 331enum
332{
d97ef72e
RH		 333 ARM_HWCAP_ARM_SWP = 1 << 0,
334 ARM_HWCAP_ARM_HALF = 1 << 1,
335 ARM_HWCAP_ARM_THUMB = 1 << 2,
336 ARM_HWCAP_ARM_26BIT = 1 << 3,
337 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
338 ARM_HWCAP_ARM_FPA = 1 << 5,
339 ARM_HWCAP_ARM_VFP = 1 << 6,
340 ARM_HWCAP_ARM_EDSP = 1 << 7,
341 ARM_HWCAP_ARM_JAVA = 1 << 8,
342 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
43ce393e
PM		 343 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
344 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
345 ARM_HWCAP_ARM_NEON = 1 << 12,
346 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
347 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
24682654
PM		 348 ARM_HWCAP_ARM_TLS = 1 << 15,
349 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
350 ARM_HWCAP_ARM_IDIVA = 1 << 17,
351 ARM_HWCAP_ARM_IDIVT = 1 << 18,
352 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
353 ARM_HWCAP_ARM_LPAE = 1 << 20,
354 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
afce2927
FB		 355};
356
ad6919dc
PM		 357enum {
358 ARM_HWCAP2_ARM_AES = 1 << 0,
359 ARM_HWCAP2_ARM_PMULL = 1 << 1,
360 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
361 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
362 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
363};
364
6b1275ff
PM		 365/* The commpage only exists for 32 bit kernels */
366
806d1021
MI		 367#define TARGET_HAS_VALIDATE_GUEST_SPACE
368/* Return 1 if the proposed guest space is suitable for the guest.
369 * Return 0 if the proposed guest space isn't suitable, but another
370 * address space should be tried.
371 * Return -1 if there is no way the proposed guest space can be
372 * valid regardless of the base.
373 * The guest code may leave a page mapped and populate it if the
374 * address is suitable.
375 */
376static int validate_guest_space(unsigned long guest_base,
377 unsigned long guest_size)
97cc7560
DDAG		 378{
379 unsigned long real_start, test_page_addr;
380
381 /* We need to check that we can force a fault on access to the
382 * commpage at 0xffff0fxx
383 */
384 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
806d1021
MI		 385
386 /* If the commpage lies within the already allocated guest space,
387 * then there is no way we can allocate it.
388 */
389 if (test_page_addr >= guest_base
390 && test_page_addr <= (guest_base + guest_size)) {
391 return -1;
392 }
393
97cc7560
DDAG		 394 /* Note it needs to be writeable to let us initialise it */
395 real_start = (unsigned long)
396 mmap((void *)test_page_addr, qemu_host_page_size,
397 PROT_READ | PROT_WRITE,
398 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
399
400 /* If we can't map it then try another address */
401 if (real_start == -1ul) {
402 return 0;
403 }
404
405 if (real_start != test_page_addr) {
406 /* OS didn't put the page where we asked - unmap and reject */
407 munmap((void *)real_start, qemu_host_page_size);
408 return 0;
409 }
410
411 /* Leave the page mapped
412 * Populate it (mmap should have left it all 0'd)
413 */
414
415 /* Kernel helper versions */
416 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
417
418 /* Now it's populated make it RO */
419 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
420 perror("Protecting guest commpage");
421 exit(-1);
422 }
423
424 return 1; /* All good */
425}
adf050b1
BC		 426
427#define ELF_HWCAP get_elf_hwcap()
ad6919dc 428#define ELF_HWCAP2 get_elf_hwcap2()
adf050b1
BC		 429
430static uint32_t get_elf_hwcap(void)
431{
a2247f8e 432 ARMCPU *cpu = ARM_CPU(thread_cpu);
adf050b1
BC		 433 uint32_t hwcaps = 0;
434
435 hwcaps |= ARM_HWCAP_ARM_SWP;
436 hwcaps |= ARM_HWCAP_ARM_HALF;
437 hwcaps |= ARM_HWCAP_ARM_THUMB;
438 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
adf050b1
BC		 439
440 /* probe for the extra features */
441#define GET_FEATURE(feat, hwcap) \
a2247f8e 442 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
24682654
PM		 443 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
444 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
adf050b1
BC		 445 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
446 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
447 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
448 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
449 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
24682654
PM		 450 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
451 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
452 GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
453 GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
454 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
455 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
456 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
457 * to our VFP_FP16 feature bit.
458 */
459 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
460 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
adf050b1
BC		 461
462 return hwcaps;
463}
afce2927 464
ad6919dc
PM		 465static uint32_t get_elf_hwcap2(void)
466{
467 ARMCPU *cpu = ARM_CPU(thread_cpu);
468 uint32_t hwcaps = 0;
469
470 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES);
4e624eda 471 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL);
f1ecb913
AB		 472 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1);
473 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2);
ad6919dc
PM		 474 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32);
475 return hwcaps;
476}
477
478#undef GET_FEATURE
479
24e76ff0
PM		 480#else
481/* 64 bit ARM definitions */
482#define ELF_START_MMAP 0x80000000
483
484#define elf_check_arch(x) ((x) == ELF_MACHINE)
485
486#define ELF_ARCH ELF_MACHINE
487#define ELF_CLASS ELFCLASS64
488#define ELF_PLATFORM "aarch64"
489
490static inline void init_thread(struct target_pt_regs *regs,
491 struct image_info *infop)
492{
493 abi_long stack = infop->start_stack;
494 memset(regs, 0, sizeof(*regs));
495
496 regs->pc = infop->entry & ~0x3ULL;
497 regs->sp = stack;
498}
499
500#define ELF_NREG 34
501typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
502
503static void elf_core_copy_regs(target_elf_gregset_t *regs,
504 const CPUARMState *env)
505{
506 int i;
507
508 for (i = 0; i < 32; i++) {
509 (*regs)[i] = tswapreg(env->xregs[i]);
510 }
511 (*regs)[32] = tswapreg(env->pc);
512 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
513}
514
515#define USE_ELF_CORE_DUMP
516#define ELF_EXEC_PAGESIZE 4096
517
518enum {
519 ARM_HWCAP_A64_FP = 1 << 0,
520 ARM_HWCAP_A64_ASIMD = 1 << 1,
521 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
522 ARM_HWCAP_A64_AES = 1 << 3,
523 ARM_HWCAP_A64_PMULL = 1 << 4,
524 ARM_HWCAP_A64_SHA1 = 1 << 5,
525 ARM_HWCAP_A64_SHA2 = 1 << 6,
526 ARM_HWCAP_A64_CRC32 = 1 << 7,
527};
528
529#define ELF_HWCAP get_elf_hwcap()
530
531static uint32_t get_elf_hwcap(void)
532{
533 ARMCPU *cpu = ARM_CPU(thread_cpu);
534 uint32_t hwcaps = 0;
535
536 hwcaps |= ARM_HWCAP_A64_FP;
537 hwcaps |= ARM_HWCAP_A64_ASIMD;
538
539 /* probe for the extra features */
540#define GET_FEATURE(feat, hwcap) \
541 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
5acc765c 542 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES);
411bdc78 543 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
f6fe04d5
PM		 544 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1);
545 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2);
130f2e7d 546 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
24e76ff0
PM		 547#undef GET_FEATURE
548
549 return hwcaps;
550}
551
552#endif /* not TARGET_AARCH64 */
553#endif /* TARGET_ARM */
30ac07d4 554
d2fbca94
GX		 555#ifdef TARGET_UNICORE32
556
557#define ELF_START_MMAP 0x80000000
558
559#define elf_check_arch(x) ((x) == EM_UNICORE32)
560
561#define ELF_CLASS ELFCLASS32
562#define ELF_DATA ELFDATA2LSB
563#define ELF_ARCH EM_UNICORE32
564
565static inline void init_thread(struct target_pt_regs *regs,
566 struct image_info *infop)
567{
568 abi_long stack = infop->start_stack;
569 memset(regs, 0, sizeof(*regs));
570 regs->UC32_REG_asr = 0x10;
571 regs->UC32_REG_pc = infop->entry & 0xfffffffe;
572 regs->UC32_REG_sp = infop->start_stack;
573 /* FIXME - what to for failure of get_user()? */
574 get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */
575 get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */
576 /* XXX: it seems that r0 is zeroed after ! */
577 regs->UC32_REG_00 = 0;
578}
579
580#define ELF_NREG 34
581typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
582
05390248 583static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env)
d2fbca94
GX		 584{
585 (*regs)[0] = env->regs[0];
586 (*regs)[1] = env->regs[1];
587 (*regs)[2] = env->regs[2];
588 (*regs)[3] = env->regs[3];
589 (*regs)[4] = env->regs[4];
590 (*regs)[5] = env->regs[5];
591 (*regs)[6] = env->regs[6];
592 (*regs)[7] = env->regs[7];
593 (*regs)[8] = env->regs[8];
594 (*regs)[9] = env->regs[9];
595 (*regs)[10] = env->regs[10];
596 (*regs)[11] = env->regs[11];
597 (*regs)[12] = env->regs[12];
598 (*regs)[13] = env->regs[13];
599 (*regs)[14] = env->regs[14];
600 (*regs)[15] = env->regs[15];
601 (*regs)[16] = env->regs[16];
602 (*regs)[17] = env->regs[17];
603 (*regs)[18] = env->regs[18];
604 (*regs)[19] = env->regs[19];
605 (*regs)[20] = env->regs[20];
606 (*regs)[21] = env->regs[21];
607 (*regs)[22] = env->regs[22];
608 (*regs)[23] = env->regs[23];
609 (*regs)[24] = env->regs[24];
610 (*regs)[25] = env->regs[25];
611 (*regs)[26] = env->regs[26];
612 (*regs)[27] = env->regs[27];
613 (*regs)[28] = env->regs[28];
614 (*regs)[29] = env->regs[29];
615 (*regs)[30] = env->regs[30];
616 (*regs)[31] = env->regs[31];
617
05390248 618 (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env);
d2fbca94
GX		 619 (*regs)[33] = env->regs[0]; /* XXX */
620}
621
622#define USE_ELF_CORE_DUMP
623#define ELF_EXEC_PAGESIZE 4096
624
625#define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)
626
627#endif
628
853d6f7a 629#ifdef TARGET_SPARC
a315a145 630#ifdef TARGET_SPARC64
853d6f7a
FB		 631
632#define ELF_START_MMAP 0x80000000
cf973e46
AT		 633#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
634 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
992f48a0 635#ifndef TARGET_ABI32
cb33da57 636#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 637#else
638#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
639#endif
853d6f7a 640
a315a145 641#define ELF_CLASS ELFCLASS64
5ef54116
FB		 642#define ELF_ARCH EM_SPARCV9
643
d97ef72e 644#define STACK_BIAS 2047
a315a145 645
d97ef72e
RH		 646static inline void init_thread(struct target_pt_regs *regs,
647 struct image_info *infop)
a315a145 648{
992f48a0 649#ifndef TARGET_ABI32
a315a145 650 regs->tstate = 0;
992f48a0 651#endif
a315a145
FB		 652 regs->pc = infop->entry;
653 regs->npc = regs->pc + 4;
654 regs->y = 0;
992f48a0
BS		 655#ifdef TARGET_ABI32
656 regs->u_regs[14] = infop->start_stack - 16 * 4;
657#else
cb33da57
BS		 658 if (personality(infop->personality) == PER_LINUX32)
659 regs->u_regs[14] = infop->start_stack - 16 * 4;
660 else
661 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
992f48a0 662#endif
a315a145
FB		 663}
664
665#else
666#define ELF_START_MMAP 0x80000000
cf973e46
AT		 667#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
668 | HWCAP_SPARC_MULDIV)
a315a145
FB		 669#define elf_check_arch(x) ( (x) == EM_SPARC )
670
853d6f7a 671#define ELF_CLASS ELFCLASS32
853d6f7a
FB		 672#define ELF_ARCH EM_SPARC
673
d97ef72e
RH		 674static inline void init_thread(struct target_pt_regs *regs,
675 struct image_info *infop)
853d6f7a 676{
f5155289
FB		 677 regs->psr = 0;
678 regs->pc = infop->entry;
679 regs->npc = regs->pc + 4;
680 regs->y = 0;
681 regs->u_regs[14] = infop->start_stack - 16 * 4;
853d6f7a
FB		 682}
683
a315a145 684#endif
853d6f7a
FB		 685#endif
686
67867308
FB		 687#ifdef TARGET_PPC
688
689#define ELF_START_MMAP 0x80000000
690
e85e7c6e 691#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
84409ddb
JM		 692
693#define elf_check_arch(x) ( (x) == EM_PPC64 )
694
d97ef72e 695#define ELF_CLASS ELFCLASS64
84409ddb
JM		 696
697#else
698
67867308
FB		 699#define elf_check_arch(x) ( (x) == EM_PPC )
700
d97ef72e 701#define ELF_CLASS ELFCLASS32
84409ddb
JM		 702
703#endif
704
d97ef72e 705#define ELF_ARCH EM_PPC
67867308 706
df84e4f3
NF		 707/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
708 See arch/powerpc/include/asm/cputable.h. */
709enum {
3efa9a67 710 QEMU_PPC_FEATURE_32 = 0x80000000,
711 QEMU_PPC_FEATURE_64 = 0x40000000,
712 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
713 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
714 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
715 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
716 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
717 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
718 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
719 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
720 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
721 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
722 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
723 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
724 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
725 QEMU_PPC_FEATURE_CELL = 0x00010000,
726 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
727 QEMU_PPC_FEATURE_SMT = 0x00004000,
728 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
729 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
730 QEMU_PPC_FEATURE_PA6T = 0x00000800,
731 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
732 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
733 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
734 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
735 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
736
737 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
738 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
df84e4f3
NF		 739};
740
741#define ELF_HWCAP get_elf_hwcap()
742
743static uint32_t get_elf_hwcap(void)
744{
a2247f8e 745 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
df84e4f3
NF		 746 uint32_t features = 0;
747
748 /* We don't have to be terribly complete here; the high points are
749 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 750#define GET_FEATURE(flag, feature) \
a2247f8e 751 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
3efa9a67 752 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
753 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
754 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
755 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
756 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
757 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
758 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
759 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
df84e4f3
NF		 760#undef GET_FEATURE
761
762 return features;
763}
764
f5155289
FB		 765/*
766 * The requirements here are:
767 * - keep the final alignment of sp (sp & 0xf)
768 * - make sure the 32-bit value at the first 16 byte aligned position of
769 * AUXV is greater than 16 for glibc compatibility.
770 * AT_IGNOREPPC is used for that.
771 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
772 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
773 */
0bccf03d 774#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 775#define ARCH_DLINFO \
776 do { \
777 NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
778 NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
779 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
780 /* \
781 * Now handle glibc compatibility. \
782 */ \
783 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
784 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
785 } while (0)
f5155289 786
67867308
FB		 787static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
788{
67867308 789 _regs->gpr[1] = infop->start_stack;
e85e7c6e 790#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
8e78064e
RH		 791 _regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_bias;
792 infop->entry = ldq_raw(infop->entry) + infop->load_bias;
84409ddb 793#endif
67867308
FB		 794 _regs->nip = infop->entry;
795}
796
e2f3e741
NF		 797/* See linux kernel: arch/powerpc/include/asm/elf.h. */
798#define ELF_NREG 48
799typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
800
05390248 801static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
e2f3e741
NF		 802{
803 int i;
804 target_ulong ccr = 0;
805
806 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
86cd7b2d 807 (*regs)[i] = tswapreg(env->gpr[i]);
e2f3e741
NF		 808 }
809
86cd7b2d
PB		 810 (*regs)[32] = tswapreg(env->nip);
811 (*regs)[33] = tswapreg(env->msr);
812 (*regs)[35] = tswapreg(env->ctr);
813 (*regs)[36] = tswapreg(env->lr);
814 (*regs)[37] = tswapreg(env->xer);
e2f3e741
NF		 815
816 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
817 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
818 }
86cd7b2d 819 (*regs)[38] = tswapreg(ccr);
e2f3e741
NF		 820}
821
822#define USE_ELF_CORE_DUMP
d97ef72e 823#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 824
825#endif
826
048f6b4d
FB		 827#ifdef TARGET_MIPS
828
829#define ELF_START_MMAP 0x80000000
830
831#define elf_check_arch(x) ( (x) == EM_MIPS )
832
388bb21a
TS		 833#ifdef TARGET_MIPS64
834#define ELF_CLASS ELFCLASS64
835#else
048f6b4d 836#define ELF_CLASS ELFCLASS32
388bb21a 837#endif
048f6b4d
FB		 838#define ELF_ARCH EM_MIPS
839
d97ef72e
RH		 840static inline void init_thread(struct target_pt_regs *regs,
841 struct image_info *infop)
048f6b4d 842{
623a930e 843 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 844 regs->cp0_epc = infop->entry;
845 regs->regs[29] = infop->start_stack;
846}
847
51e52606
NF		 848/* See linux kernel: arch/mips/include/asm/elf.h. */
849#define ELF_NREG 45
850typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
851
852/* See linux kernel: arch/mips/include/asm/reg.h. */
853enum {
854#ifdef TARGET_MIPS64
855 TARGET_EF_R0 = 0,
856#else
857 TARGET_EF_R0 = 6,
858#endif
859 TARGET_EF_R26 = TARGET_EF_R0 + 26,
860 TARGET_EF_R27 = TARGET_EF_R0 + 27,
861 TARGET_EF_LO = TARGET_EF_R0 + 32,
862 TARGET_EF_HI = TARGET_EF_R0 + 33,
863 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
864 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
865 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
866 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
867};
868
869/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 870static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
51e52606
NF		 871{
872 int i;
873
874 for (i = 0; i < TARGET_EF_R0; i++) {
875 (*regs)[i] = 0;
876 }
877 (*regs)[TARGET_EF_R0] = 0;
878
879 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
a29f998d 880 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
51e52606
NF		 881 }
882
883 (*regs)[TARGET_EF_R26] = 0;
884 (*regs)[TARGET_EF_R27] = 0;
a29f998d
PB		 885 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
886 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
887 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
888 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
889 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
890 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
51e52606
NF		 891}
892
893#define USE_ELF_CORE_DUMP
388bb21a
TS		 894#define ELF_EXEC_PAGESIZE 4096
895
048f6b4d
FB		 896#endif /* TARGET_MIPS */
897
b779e29e
EI		 898#ifdef TARGET_MICROBLAZE
899
900#define ELF_START_MMAP 0x80000000
901
0d5d4699 902#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 903
904#define ELF_CLASS ELFCLASS32
0d5d4699 905#define ELF_ARCH EM_MICROBLAZE
b779e29e 906
d97ef72e
RH		 907static inline void init_thread(struct target_pt_regs *regs,
908 struct image_info *infop)
b779e29e
EI		 909{
910 regs->pc = infop->entry;
911 regs->r1 = infop->start_stack;
912
913}
914
b779e29e
EI		 915#define ELF_EXEC_PAGESIZE 4096
916
e4cbd44d
EI		 917#define USE_ELF_CORE_DUMP
918#define ELF_NREG 38
919typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
920
921/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 922static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
e4cbd44d
EI		 923{
924 int i, pos = 0;
925
926 for (i = 0; i < 32; i++) {
86cd7b2d 927 (*regs)[pos++] = tswapreg(env->regs[i]);
e4cbd44d
EI		 928 }
929
930 for (i = 0; i < 6; i++) {
86cd7b2d 931 (*regs)[pos++] = tswapreg(env->sregs[i]);
e4cbd44d
EI		 932 }
933}
934
b779e29e
EI		 935#endif /* TARGET_MICROBLAZE */
936
d962783e
JL		 937#ifdef TARGET_OPENRISC
938
939#define ELF_START_MMAP 0x08000000
940
941#define elf_check_arch(x) ((x) == EM_OPENRISC)
942
943#define ELF_ARCH EM_OPENRISC
944#define ELF_CLASS ELFCLASS32
945#define ELF_DATA ELFDATA2MSB
946
947static inline void init_thread(struct target_pt_regs *regs,
948 struct image_info *infop)
949{
950 regs->pc = infop->entry;
951 regs->gpr[1] = infop->start_stack;
952}
953
954#define USE_ELF_CORE_DUMP
955#define ELF_EXEC_PAGESIZE 8192
956
957/* See linux kernel arch/openrisc/include/asm/elf.h. */
958#define ELF_NREG 34 /* gprs and pc, sr */
959typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
960
961static void elf_core_copy_regs(target_elf_gregset_t *regs,
962 const CPUOpenRISCState *env)
963{
964 int i;
965
966 for (i = 0; i < 32; i++) {
86cd7b2d 967 (*regs)[i] = tswapreg(env->gpr[i]);
d962783e
JL		 968 }
969
86cd7b2d
PB		 970 (*regs)[32] = tswapreg(env->pc);
971 (*regs)[33] = tswapreg(env->sr);
d962783e
JL		 972}
973#define ELF_HWCAP 0
974#define ELF_PLATFORM NULL
975
976#endif /* TARGET_OPENRISC */
977
fdf9b3e8
FB		 978#ifdef TARGET_SH4
979
980#define ELF_START_MMAP 0x80000000
981
982#define elf_check_arch(x) ( (x) == EM_SH )
983
984#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 985#define ELF_ARCH EM_SH
986
d97ef72e
RH		 987static inline void init_thread(struct target_pt_regs *regs,
988 struct image_info *infop)
fdf9b3e8 989{
d97ef72e
RH		 990 /* Check other registers XXXXX */
991 regs->pc = infop->entry;
992 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 993}
994
7631c97e
NF		 995/* See linux kernel: arch/sh/include/asm/elf.h. */
996#define ELF_NREG 23
997typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
998
999/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1000enum {
1001 TARGET_REG_PC = 16,
1002 TARGET_REG_PR = 17,
1003 TARGET_REG_SR = 18,
1004 TARGET_REG_GBR = 19,
1005 TARGET_REG_MACH = 20,
1006 TARGET_REG_MACL = 21,
1007 TARGET_REG_SYSCALL = 22
1008};
1009
d97ef72e 1010static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
05390248 1011 const CPUSH4State *env)
7631c97e
NF		 1012{
1013 int i;
1014
1015 for (i = 0; i < 16; i++) {
86cd7b2d 1016 (*regs[i]) = tswapreg(env->gregs[i]);
7631c97e
NF		 1017 }
1018
86cd7b2d
PB		 1019 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1020 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1021 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1022 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1023 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1024 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
7631c97e
NF		 1025 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1026}
1027
1028#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 1029#define ELF_EXEC_PAGESIZE 4096
1030
1031#endif
1032
48733d19
TS		 1033#ifdef TARGET_CRIS
1034
1035#define ELF_START_MMAP 0x80000000
1036
1037#define elf_check_arch(x) ( (x) == EM_CRIS )
1038
1039#define ELF_CLASS ELFCLASS32
48733d19
TS		 1040#define ELF_ARCH EM_CRIS
1041
d97ef72e
RH		 1042static inline void init_thread(struct target_pt_regs *regs,
1043 struct image_info *infop)
48733d19 1044{
d97ef72e 1045 regs->erp = infop->entry;
48733d19
TS		 1046}
1047
48733d19
TS		 1048#define ELF_EXEC_PAGESIZE 8192
1049
1050#endif
1051
e6e5906b
PB		 1052#ifdef TARGET_M68K
1053
1054#define ELF_START_MMAP 0x80000000
1055
1056#define elf_check_arch(x) ( (x) == EM_68K )
1057
d97ef72e 1058#define ELF_CLASS ELFCLASS32
d97ef72e 1059#define ELF_ARCH EM_68K
e6e5906b
PB		 1060
1061/* ??? Does this need to do anything?
d97ef72e 1062 #define ELF_PLAT_INIT(_r) */
e6e5906b 1063
d97ef72e
RH		 1064static inline void init_thread(struct target_pt_regs *regs,
1065 struct image_info *infop)
e6e5906b
PB		 1066{
1067 regs->usp = infop->start_stack;
1068 regs->sr = 0;
1069 regs->pc = infop->entry;
1070}
1071
7a93cc55
NF		 1072/* See linux kernel: arch/m68k/include/asm/elf.h. */
1073#define ELF_NREG 20
1074typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1075
05390248 1076static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
7a93cc55 1077{
86cd7b2d
PB		 1078 (*regs)[0] = tswapreg(env->dregs[1]);
1079 (*regs)[1] = tswapreg(env->dregs[2]);
1080 (*regs)[2] = tswapreg(env->dregs[3]);
1081 (*regs)[3] = tswapreg(env->dregs[4]);
1082 (*regs)[4] = tswapreg(env->dregs[5]);
1083 (*regs)[5] = tswapreg(env->dregs[6]);
1084 (*regs)[6] = tswapreg(env->dregs[7]);
1085 (*regs)[7] = tswapreg(env->aregs[0]);
1086 (*regs)[8] = tswapreg(env->aregs[1]);
1087 (*regs)[9] = tswapreg(env->aregs[2]);
1088 (*regs)[10] = tswapreg(env->aregs[3]);
1089 (*regs)[11] = tswapreg(env->aregs[4]);
1090 (*regs)[12] = tswapreg(env->aregs[5]);
1091 (*regs)[13] = tswapreg(env->aregs[6]);
1092 (*regs)[14] = tswapreg(env->dregs[0]);
1093 (*regs)[15] = tswapreg(env->aregs[7]);
1094 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1095 (*regs)[17] = tswapreg(env->sr);
1096 (*regs)[18] = tswapreg(env->pc);
7a93cc55
NF		 1097 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1098}
1099
1100#define USE_ELF_CORE_DUMP
d97ef72e 1101#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 1102
1103#endif
1104
7a3148a9
JM		 1105#ifdef TARGET_ALPHA
1106
1107#define ELF_START_MMAP (0x30000000000ULL)
1108
1109#define elf_check_arch(x) ( (x) == ELF_ARCH )
1110
1111#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 1112#define ELF_ARCH EM_ALPHA
1113
d97ef72e
RH		 1114static inline void init_thread(struct target_pt_regs *regs,
1115 struct image_info *infop)
7a3148a9
JM		 1116{
1117 regs->pc = infop->entry;
1118 regs->ps = 8;
1119 regs->usp = infop->start_stack;
7a3148a9
JM		 1120}
1121
7a3148a9
JM		 1122#define ELF_EXEC_PAGESIZE 8192
1123
1124#endif /* TARGET_ALPHA */
1125
a4c075f1
UH		 1126#ifdef TARGET_S390X
1127
1128#define ELF_START_MMAP (0x20000000000ULL)
1129
1130#define elf_check_arch(x) ( (x) == ELF_ARCH )
1131
1132#define ELF_CLASS ELFCLASS64
1133#define ELF_DATA ELFDATA2MSB
1134#define ELF_ARCH EM_S390
1135
1136static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1137{
1138 regs->psw.addr = infop->entry;
1139 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1140 regs->gprs[15] = infop->start_stack;
1141}
1142
1143#endif /* TARGET_S390X */
1144
15338fd7
FB		 1145#ifndef ELF_PLATFORM
1146#define ELF_PLATFORM (NULL)
1147#endif
1148
1149#ifndef ELF_HWCAP
1150#define ELF_HWCAP 0
1151#endif
1152
992f48a0 1153#ifdef TARGET_ABI32
cb33da57 1154#undef ELF_CLASS
992f48a0 1155#define ELF_CLASS ELFCLASS32
cb33da57
BS		 1156#undef bswaptls
1157#define bswaptls(ptr) bswap32s(ptr)
1158#endif
1159
31e31b8a 1160#include "elf.h"
09bfb054 1161
09bfb054
FB		 1162struct exec
1163{
d97ef72e
RH		 1164 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1165 unsigned int a_text; /* length of text, in bytes */
1166 unsigned int a_data; /* length of data, in bytes */
1167 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1168 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1169 unsigned int a_entry; /* start address */
1170 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1171 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 1172};
1173
1174
1175#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1176#define OMAGIC 0407
1177#define NMAGIC 0410
1178#define ZMAGIC 0413
1179#define QMAGIC 0314
1180
31e31b8a 1181/* Necessary parameters */
54936004
FB		 1182#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
1183#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
1184#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 1185
ad1c7e0f 1186#define DLINFO_ITEMS 14
31e31b8a 1187
09bfb054
FB		 1188static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1189{
d97ef72e 1190 memcpy(to, from, n);
09bfb054 1191}
d691f669 1192
31e31b8a 1193#ifdef BSWAP_NEEDED
92a31b1f 1194static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 1195{
d97ef72e
RH		 1196 bswap16s(&ehdr->e_type); /* Object file type */
1197 bswap16s(&ehdr->e_machine); /* Architecture */
1198 bswap32s(&ehdr->e_version); /* Object file version */
1199 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1200 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1201 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1202 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1203 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1204 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1205 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1206 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1207 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1208 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 1209}
1210
991f8f0c 1211static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 1212{
991f8f0c
RH		 1213 int i;
1214 for (i = 0; i < phnum; ++i, ++phdr) {
1215 bswap32s(&phdr->p_type); /* Segment type */
1216 bswap32s(&phdr->p_flags); /* Segment flags */
1217 bswaptls(&phdr->p_offset); /* Segment file offset */
1218 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1219 bswaptls(&phdr->p_paddr); /* Segment physical address */
1220 bswaptls(&phdr->p_filesz); /* Segment size in file */
1221 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1222 bswaptls(&phdr->p_align); /* Segment alignment */
1223 }
31e31b8a 1224}
689f936f 1225
991f8f0c 1226static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 1227{
991f8f0c
RH		 1228 int i;
1229 for (i = 0; i < shnum; ++i, ++shdr) {
1230 bswap32s(&shdr->sh_name);
1231 bswap32s(&shdr->sh_type);
1232 bswaptls(&shdr->sh_flags);
1233 bswaptls(&shdr->sh_addr);
1234 bswaptls(&shdr->sh_offset);
1235 bswaptls(&shdr->sh_size);
1236 bswap32s(&shdr->sh_link);
1237 bswap32s(&shdr->sh_info);
1238 bswaptls(&shdr->sh_addralign);
1239 bswaptls(&shdr->sh_entsize);
1240 }
689f936f
FB		 1241}
1242
7a3148a9 1243static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 1244{
1245 bswap32s(&sym->st_name);
7a3148a9
JM		 1246 bswaptls(&sym->st_value);
1247 bswaptls(&sym->st_size);
689f936f
FB		 1248 bswap16s(&sym->st_shndx);
1249}
991f8f0c
RH		 1250#else
1251static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1252static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1253static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1254static inline void bswap_sym(struct elf_sym *sym) { }
31e31b8a
FB		 1255#endif
1256
edf8e2af 1257#ifdef USE_ELF_CORE_DUMP
9349b4f9 1258static int elf_core_dump(int, const CPUArchState *);
edf8e2af 1259#endif /* USE_ELF_CORE_DUMP */
682674b8 1260static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 1261
9058abdd
RH		 1262/* Verify the portions of EHDR within E_IDENT for the target.
1263 This can be performed before bswapping the entire header. */
1264static bool elf_check_ident(struct elfhdr *ehdr)
1265{
1266 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1267 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1268 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1269 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1270 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1271 && ehdr->e_ident[EI_DATA] == ELF_DATA
1272 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1273}
1274
1275/* Verify the portions of EHDR outside of E_IDENT for the target.
1276 This has to wait until after bswapping the header. */
1277static bool elf_check_ehdr(struct elfhdr *ehdr)
1278{
1279 return (elf_check_arch(ehdr->e_machine)
1280 && ehdr->e_ehsize == sizeof(struct elfhdr)
1281 && ehdr->e_phentsize == sizeof(struct elf_phdr)
1282 && ehdr->e_shentsize == sizeof(struct elf_shdr)
1283 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1284}
1285
31e31b8a 1286/*
e5fe0c52 1287 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 1288 * memory to free pages in kernel mem. These are in a format ready
1289 * to be put directly into the top of new user memory.
1290 *
1291 */
992f48a0
BS		 1292static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
1293 abi_ulong p)
31e31b8a
FB		 1294{
1295 char *tmp, *tmp1, *pag = NULL;
1296 int len, offset = 0;
1297
1298 if (!p) {
d97ef72e 1299 return 0; /* bullet-proofing */
31e31b8a
FB		 1300 }
1301 while (argc-- > 0) {
edf779ff
FB		 1302 tmp = argv[argc];
1303 if (!tmp) {
d97ef72e
RH		 1304 fprintf(stderr, "VFS: argc is wrong");
1305 exit(-1);
1306 }
edf779ff 1307 tmp1 = tmp;
d97ef72e
RH		 1308 while (*tmp++);
1309 len = tmp - tmp1;
1310 if (p < len) { /* this shouldn't happen - 128kB */
1311 return 0;
1312 }
1313 while (len) {
1314 --p; --tmp; --len;
1315 if (--offset < 0) {
1316 offset = p % TARGET_PAGE_SIZE;
53a5960a 1317 pag = (char *)page[p/TARGET_PAGE_SIZE];
44a91cae 1318 if (!pag) {
7dd47667 1319 pag = g_try_malloc0(TARGET_PAGE_SIZE);
53a5960a 1320 page[p/TARGET_PAGE_SIZE] = pag;
44a91cae
FB		 1321 if (!pag)
1322 return 0;
d97ef72e
RH		 1323 }
1324 }
1325 if (len == 0 || offset == 0) {
1326 *(pag + offset) = *tmp;
1327 }
1328 else {
1329 int bytes_to_copy = (len > offset) ? offset : len;
1330 tmp -= bytes_to_copy;
1331 p -= bytes_to_copy;
1332 offset -= bytes_to_copy;
1333 len -= bytes_to_copy;
1334 memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
1335 }
1336 }
31e31b8a
FB		 1337 }
1338 return p;
1339}
1340
992f48a0
BS		 1341static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
1342 struct image_info *info)
53a5960a 1343{
60dcbcb5 1344 abi_ulong stack_base, size, error, guard;
31e31b8a 1345 int i;
31e31b8a 1346
09bfb054 1347 /* Create enough stack to hold everything. If we don't use
60dcbcb5 1348 it for args, we'll use it for something else. */
703e0e89 1349 size = guest_stack_size;
60dcbcb5 1350 if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) {
54936004 1351 size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
60dcbcb5
RH		 1352 }
1353 guard = TARGET_PAGE_SIZE;
1354 if (guard < qemu_real_host_page_size) {
1355 guard = qemu_real_host_page_size;
1356 }
1357
1358 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1359 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1360 if (error == -1) {
60dcbcb5 1361 perror("mmap stack");
09bfb054
FB		 1362 exit(-1);
1363 }
31e31b8a 1364
60dcbcb5
RH		 1365 /* We reserve one extra page at the top of the stack as guard. */
1366 target_mprotect(error, guard, PROT_NONE);
1367
1368 info->stack_limit = error + guard;
1369 stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
31e31b8a 1370 p += stack_base;
09bfb054 1371
31e31b8a 1372 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
d97ef72e
RH		 1373 if (bprm->page[i]) {
1374 info->rss++;
579a97f7 1375 /* FIXME - check return value of memcpy_to_target() for failure */
d97ef72e 1376 memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
7dd47667 1377 g_free(bprm->page[i]);
d97ef72e 1378 }
53a5960a 1379 stack_base += TARGET_PAGE_SIZE;
31e31b8a
FB		 1380 }
1381 return p;
1382}
1383
cf129f3a
RH		 1384/* Map and zero the bss. We need to explicitly zero any fractional pages
1385 after the data section (i.e. bss). */
1386static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1387{
cf129f3a
RH		 1388 uintptr_t host_start, host_map_start, host_end;
1389
1390 last_bss = TARGET_PAGE_ALIGN(last_bss);
1391
1392 /* ??? There is confusion between qemu_real_host_page_size and
1393 qemu_host_page_size here and elsewhere in target_mmap, which
1394 may lead to the end of the data section mapping from the file
1395 not being mapped. At least there was an explicit test and
1396 comment for that here, suggesting that "the file size must
1397 be known". The comment probably pre-dates the introduction
1398 of the fstat system call in target_mmap which does in fact
1399 find out the size. What isn't clear is if the workaround
1400 here is still actually needed. For now, continue with it,
1401 but merge it with the "normal" mmap that would allocate the bss. */
1402
1403 host_start = (uintptr_t) g2h(elf_bss);
1404 host_end = (uintptr_t) g2h(last_bss);
1405 host_map_start = (host_start + qemu_real_host_page_size - 1);
1406 host_map_start &= -qemu_real_host_page_size;
1407
1408 if (host_map_start < host_end) {
1409 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1410 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1411 if (p == MAP_FAILED) {
1412 perror("cannot mmap brk");
1413 exit(-1);
853d6f7a
FB		 1414 }
1415
cf129f3a
RH		 1416 /* Since we didn't use target_mmap, make sure to record
1417 the validity of the pages with qemu. */
1418 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID);
1419 }
31e31b8a 1420
cf129f3a
RH		 1421 if (host_start < host_map_start) {
1422 memset((void *)host_start, 0, host_map_start - host_start);
1423 }
1424}
53a5960a 1425
1af02e83
MF		 1426#ifdef CONFIG_USE_FDPIC
1427static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1428{
1429 uint16_t n;
1430 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1431
1432 /* elf32_fdpic_loadseg */
1433 n = info->nsegs;
1434 while (n--) {
1435 sp -= 12;
1436 put_user_u32(loadsegs[n].addr, sp+0);
1437 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1438 put_user_u32(loadsegs[n].p_memsz, sp+8);
1439 }
1440
1441 /* elf32_fdpic_loadmap */
1442 sp -= 4;
1443 put_user_u16(0, sp+0); /* version */
1444 put_user_u16(info->nsegs, sp+2); /* nsegs */
1445
1446 info->personality = PER_LINUX_FDPIC;
1447 info->loadmap_addr = sp;
1448
1449 return sp;
1450}
1451#endif
1452
992f48a0 1453static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 1454 struct elfhdr *exec,
1455 struct image_info *info,
1456 struct image_info *interp_info)
31e31b8a 1457{
d97ef72e 1458 abi_ulong sp;
125b0f55 1459 abi_ulong sp_auxv;
d97ef72e 1460 int size;
14322bad
LA		 1461 int i;
1462 abi_ulong u_rand_bytes;
1463 uint8_t k_rand_bytes[16];
d97ef72e
RH		 1464 abi_ulong u_platform;
1465 const char *k_platform;
1466 const int n = sizeof(elf_addr_t);
1467
1468 sp = p;
1af02e83
MF		 1469
1470#ifdef CONFIG_USE_FDPIC
1471 /* Needs to be before we load the env/argc/... */
1472 if (elf_is_fdpic(exec)) {
1473 /* Need 4 byte alignment for these structs */
1474 sp &= ~3;
1475 sp = loader_build_fdpic_loadmap(info, sp);
1476 info->other_info = interp_info;
1477 if (interp_info) {
1478 interp_info->other_info = info;
1479 sp = loader_build_fdpic_loadmap(interp_info, sp);
1480 }
1481 }
1482#endif
1483
d97ef72e
RH		 1484 u_platform = 0;
1485 k_platform = ELF_PLATFORM;
1486 if (k_platform) {
1487 size_t len = strlen(k_platform) + 1;
1488 sp -= (len + n - 1) & ~(n - 1);
1489 u_platform = sp;
1490 /* FIXME - check return value of memcpy_to_target() for failure */
1491 memcpy_to_target(sp, k_platform, len);
1492 }
14322bad
LA		 1493
1494 /*
1495 * Generate 16 random bytes for userspace PRNG seeding (not
1496 * cryptically secure but it's not the aim of QEMU).
1497 */
1498 srand((unsigned int) time(NULL));
1499 for (i = 0; i < 16; i++) {
1500 k_rand_bytes[i] = rand();
1501 }
1502 sp -= 16;
1503 u_rand_bytes = sp;
1504 /* FIXME - check return value of memcpy_to_target() for failure */
1505 memcpy_to_target(sp, k_rand_bytes, 16);
1506
d97ef72e
RH		 1507 /*
1508 * Force 16 byte _final_ alignment here for generality.
1509 */
1510 sp = sp &~ (abi_ulong)15;
1511 size = (DLINFO_ITEMS + 1) * 2;
1512 if (k_platform)
1513 size += 2;
f5155289 1514#ifdef DLINFO_ARCH_ITEMS
d97ef72e 1515 size += DLINFO_ARCH_ITEMS * 2;
ad6919dc
PM		 1516#endif
1517#ifdef ELF_HWCAP2
1518 size += 2;
f5155289 1519#endif
d97ef72e 1520 size += envc + argc + 2;
b9329d4b 1521 size += 1; /* argc itself */
d97ef72e
RH		 1522 size *= n;
1523 if (size & 15)
1524 sp -= 16 - (size & 15);
1525
1526 /* This is correct because Linux defines
1527 * elf_addr_t as Elf32_Off / Elf64_Off
1528 */
1529#define NEW_AUX_ENT(id, val) do { \
1530 sp -= n; put_user_ual(val, sp); \
1531 sp -= n; put_user_ual(id, sp); \
1532 } while(0)
1533
125b0f55 1534 sp_auxv = sp;
d97ef72e
RH		 1535 NEW_AUX_ENT (AT_NULL, 0);
1536
1537 /* There must be exactly DLINFO_ITEMS entries here. */
8e62a717 1538 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 1539 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1540 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
1541 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
8e62a717 1542 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 1543 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 1544 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 1545 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1546 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1547 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1548 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1549 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1550 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
14322bad
LA		 1551 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
1552
ad6919dc
PM		 1553#ifdef ELF_HWCAP2
1554 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1555#endif
1556
d97ef72e
RH		 1557 if (k_platform)
1558 NEW_AUX_ENT(AT_PLATFORM, u_platform);
f5155289 1559#ifdef ARCH_DLINFO
d97ef72e
RH		 1560 /*
1561 * ARCH_DLINFO must come last so platform specific code can enforce
1562 * special alignment requirements on the AUXV if necessary (eg. PPC).
1563 */
1564 ARCH_DLINFO;
f5155289
FB		 1565#endif
1566#undef NEW_AUX_ENT
1567
d97ef72e 1568 info->saved_auxv = sp;
125b0f55 1569 info->auxv_len = sp_auxv - sp;
edf8e2af 1570
b9329d4b 1571 sp = loader_build_argptr(envc, argc, sp, p, 0);
8c0f0a60
JH		 1572 /* Check the right amount of stack was allocated for auxvec, envp & argv. */
1573 assert(sp_auxv - sp == size);
d97ef72e 1574 return sp;
31e31b8a
FB		 1575}
1576
806d1021 1577#ifndef TARGET_HAS_VALIDATE_GUEST_SPACE
97cc7560 1578/* If the guest doesn't have a validation function just agree */
806d1021
MI		 1579static int validate_guest_space(unsigned long guest_base,
1580 unsigned long guest_size)
97cc7560
DDAG		 1581{
1582 return 1;
1583}
1584#endif
1585
dce10401
MI		 1586unsigned long init_guest_space(unsigned long host_start,
1587 unsigned long host_size,
1588 unsigned long guest_start,
1589 bool fixed)
1590{
1591 unsigned long current_start, real_start;
1592 int flags;
1593
1594 assert(host_start || host_size);
1595
1596 /* If just a starting address is given, then just verify that
1597 * address. */
1598 if (host_start && !host_size) {
806d1021 1599 if (validate_guest_space(host_start, host_size) == 1) {
dce10401
MI		 1600 return host_start;
1601 } else {
1602 return (unsigned long)-1;
1603 }
1604 }
1605
1606 /* Setup the initial flags and start address. */
1607 current_start = host_start & qemu_host_page_mask;
1608 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
1609 if (fixed) {
1610 flags |= MAP_FIXED;
1611 }
1612
1613 /* Otherwise, a non-zero size region of memory needs to be mapped
1614 * and validated. */
1615 while (1) {
806d1021
MI		 1616 unsigned long real_size = host_size;
1617
dce10401
MI		 1618 /* Do not use mmap_find_vma here because that is limited to the
1619 * guest address space. We are going to make the
1620 * guest address space fit whatever we're given.
1621 */
1622 real_start = (unsigned long)
1623 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
1624 if (real_start == (unsigned long)-1) {
1625 return (unsigned long)-1;
1626 }
1627
806d1021
MI		 1628 /* Ensure the address is properly aligned. */
1629 if (real_start & ~qemu_host_page_mask) {
1630 munmap((void *)real_start, host_size);
1631 real_size = host_size + qemu_host_page_size;
1632 real_start = (unsigned long)
1633 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
1634 if (real_start == (unsigned long)-1) {
1635 return (unsigned long)-1;
1636 }
1637 real_start = HOST_PAGE_ALIGN(real_start);
1638 }
1639
1640 /* Check to see if the address is valid. */
1641 if (!host_start || real_start == current_start) {
1642 int valid = validate_guest_space(real_start - guest_start,
1643 real_size);
1644 if (valid == 1) {
1645 break;
1646 } else if (valid == -1) {
1647 return (unsigned long)-1;
1648 }
1649 /* valid == 0, so try again. */
dce10401
MI		 1650 }
1651
1652 /* That address didn't work. Unmap and try a different one.
1653 * The address the host picked because is typically right at
1654 * the top of the host address space and leaves the guest with
1655 * no usable address space. Resort to a linear search. We
1656 * already compensated for mmap_min_addr, so this should not
1657 * happen often. Probably means we got unlucky and host
1658 * address space randomization put a shared library somewhere
1659 * inconvenient.
1660 */
1661 munmap((void *)real_start, host_size);
1662 current_start += qemu_host_page_size;
1663 if (host_start == current_start) {
1664 /* Theoretically possible if host doesn't have any suitably
1665 * aligned areas. Normally the first mmap will fail.
1666 */
1667 return (unsigned long)-1;
1668 }
1669 }
1670
806d1021
MI		 1671 qemu_log("Reserved 0x%lx bytes of guest address space\n", host_size);
1672
dce10401
MI		 1673 return real_start;
1674}
1675
f3ed1f5d
PM		 1676static void probe_guest_base(const char *image_name,
1677 abi_ulong loaddr, abi_ulong hiaddr)
1678{
1679 /* Probe for a suitable guest base address, if the user has not set
1680 * it explicitly, and set guest_base appropriately.
1681 * In case of error we will print a suitable message and exit.
1682 */
1683#if defined(CONFIG_USE_GUEST_BASE)
1684 const char *errmsg;
1685 if (!have_guest_base && !reserved_va) {
1686 unsigned long host_start, real_start, host_size;
1687
1688 /* Round addresses to page boundaries. */
1689 loaddr &= qemu_host_page_mask;
1690 hiaddr = HOST_PAGE_ALIGN(hiaddr);
1691
1692 if (loaddr < mmap_min_addr) {
1693 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
1694 } else {
1695 host_start = loaddr;
1696 if (host_start != loaddr) {
1697 errmsg = "Address overflow loading ELF binary";
1698 goto exit_errmsg;
1699 }
1700 }
1701 host_size = hiaddr - loaddr;
dce10401
MI		 1702
1703 /* Setup the initial guest memory space with ranges gleaned from
1704 * the ELF image that is being loaded.
1705 */
1706 real_start = init_guest_space(host_start, host_size, loaddr, false);
1707 if (real_start == (unsigned long)-1) {
1708 errmsg = "Unable to find space for application";
1709 goto exit_errmsg;
f3ed1f5d 1710 }
dce10401
MI		 1711 guest_base = real_start - loaddr;
1712
f3ed1f5d
PM		 1713 qemu_log("Relocating guest address space from 0x"
1714 TARGET_ABI_FMT_lx " to 0x%lx\n",
1715 loaddr, real_start);
f3ed1f5d
PM		 1716 }
1717 return;
1718
f3ed1f5d
PM		 1719exit_errmsg:
1720 fprintf(stderr, "%s: %s\n", image_name, errmsg);
1721 exit(-1);
1722#endif
1723}
1724
1725
8e62a717 1726/* Load an ELF image into the address space.
31e31b8a 1727
8e62a717
RH		 1728 IMAGE_NAME is the filename of the image, to use in error messages.
1729 IMAGE_FD is the open file descriptor for the image.
1730
1731 BPRM_BUF is a copy of the beginning of the file; this of course
1732 contains the elf file header at offset 0. It is assumed that this
1733 buffer is sufficiently aligned to present no problems to the host
1734 in accessing data at aligned offsets within the buffer.
1735
1736 On return: INFO values will be filled in, as necessary or available. */
1737
1738static void load_elf_image(const char *image_name, int image_fd,
bf858897 1739 struct image_info *info, char **pinterp_name,
8e62a717 1740 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 1741{
8e62a717
RH		 1742 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
1743 struct elf_phdr *phdr;
1744 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
1745 int i, retval;
1746 const char *errmsg;
5fafdf24 1747
8e62a717
RH		 1748 /* First of all, some simple consistency checks */
1749 errmsg = "Invalid ELF image for this architecture";
1750 if (!elf_check_ident(ehdr)) {
1751 goto exit_errmsg;
1752 }
1753 bswap_ehdr(ehdr);
1754 if (!elf_check_ehdr(ehdr)) {
1755 goto exit_errmsg;
d97ef72e 1756 }
5fafdf24 1757
8e62a717
RH		 1758 i = ehdr->e_phnum * sizeof(struct elf_phdr);
1759 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
1760 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 1761 } else {
8e62a717
RH		 1762 phdr = (struct elf_phdr *) alloca(i);
1763 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 1764 if (retval != i) {
8e62a717 1765 goto exit_read;
9955ffac 1766 }
d97ef72e 1767 }
8e62a717 1768 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 1769
1af02e83
MF		 1770#ifdef CONFIG_USE_FDPIC
1771 info->nsegs = 0;
1772 info->pt_dynamic_addr = 0;
1773#endif
1774
682674b8
RH		 1775 /* Find the maximum size of the image and allocate an appropriate
1776 amount of memory to handle that. */
1777 loaddr = -1, hiaddr = 0;
8e62a717
RH		 1778 for (i = 0; i < ehdr->e_phnum; ++i) {
1779 if (phdr[i].p_type == PT_LOAD) {
1780 abi_ulong a = phdr[i].p_vaddr;
682674b8
RH		 1781 if (a < loaddr) {
1782 loaddr = a;
1783 }
8e62a717 1784 a += phdr[i].p_memsz;
682674b8
RH		 1785 if (a > hiaddr) {
1786 hiaddr = a;
1787 }
1af02e83
MF		 1788#ifdef CONFIG_USE_FDPIC
1789 ++info->nsegs;
1790#endif
682674b8
RH		 1791 }
1792 }
1793
1794 load_addr = loaddr;
8e62a717 1795 if (ehdr->e_type == ET_DYN) {
682674b8
RH		 1796 /* The image indicates that it can be loaded anywhere. Find a
1797 location that can hold the memory space required. If the
1798 image is pre-linked, LOADDR will be non-zero. Since we do
1799 not supply MAP_FIXED here we'll use that address if and
1800 only if it remains available. */
1801 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
1802 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
1803 -1, 0);
1804 if (load_addr == -1) {
8e62a717 1805 goto exit_perror;
d97ef72e 1806 }
bf858897
RH		 1807 } else if (pinterp_name != NULL) {
1808 /* This is the main executable. Make sure that the low
1809 address does not conflict with MMAP_MIN_ADDR or the
1810 QEMU application itself. */
f3ed1f5d 1811 probe_guest_base(image_name, loaddr, hiaddr);
d97ef72e 1812 }
682674b8 1813 load_bias = load_addr - loaddr;
d97ef72e 1814
1af02e83
MF		 1815#ifdef CONFIG_USE_FDPIC
1816 {
1817 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
7267c094 1818 g_malloc(sizeof(*loadsegs) * info->nsegs);
1af02e83
MF		 1819
1820 for (i = 0; i < ehdr->e_phnum; ++i) {
1821 switch (phdr[i].p_type) {
1822 case PT_DYNAMIC:
1823 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
1824 break;
1825 case PT_LOAD:
1826 loadsegs->addr = phdr[i].p_vaddr + load_bias;
1827 loadsegs->p_vaddr = phdr[i].p_vaddr;
1828 loadsegs->p_memsz = phdr[i].p_memsz;
1829 ++loadsegs;
1830 break;
1831 }
1832 }
1833 }
1834#endif
1835
8e62a717
RH		 1836 info->load_bias = load_bias;
1837 info->load_addr = load_addr;
1838 info->entry = ehdr->e_entry + load_bias;
1839 info->start_code = -1;
1840 info->end_code = 0;
1841 info->start_data = -1;
1842 info->end_data = 0;
1843 info->brk = 0;
d8fd2954 1844 info->elf_flags = ehdr->e_flags;
8e62a717
RH		 1845
1846 for (i = 0; i < ehdr->e_phnum; i++) {
1847 struct elf_phdr *eppnt = phdr + i;
d97ef72e 1848 if (eppnt->p_type == PT_LOAD) {
682674b8 1849 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
d97ef72e 1850 int elf_prot = 0;
d97ef72e
RH		 1851
1852 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
1853 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
1854 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
d97ef72e 1855
682674b8
RH		 1856 vaddr = load_bias + eppnt->p_vaddr;
1857 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
1858 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
1859
1860 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
1861 elf_prot, MAP_PRIVATE | MAP_FIXED,
8e62a717 1862 image_fd, eppnt->p_offset - vaddr_po);
09bfb054 1863 if (error == -1) {
8e62a717 1864 goto exit_perror;
09bfb054 1865 }
09bfb054 1866
682674b8
RH		 1867 vaddr_ef = vaddr + eppnt->p_filesz;
1868 vaddr_em = vaddr + eppnt->p_memsz;
31e31b8a 1869
cf129f3a 1870 /* If the load segment requests extra zeros (e.g. bss), map it. */
682674b8
RH		 1871 if (vaddr_ef < vaddr_em) {
1872 zero_bss(vaddr_ef, vaddr_em, elf_prot);
cf129f3a 1873 }
8e62a717
RH		 1874
1875 /* Find the full program boundaries. */
1876 if (elf_prot & PROT_EXEC) {
1877 if (vaddr < info->start_code) {
1878 info->start_code = vaddr;
1879 }
1880 if (vaddr_ef > info->end_code) {
1881 info->end_code = vaddr_ef;
1882 }
1883 }
1884 if (elf_prot & PROT_WRITE) {
1885 if (vaddr < info->start_data) {
1886 info->start_data = vaddr;
1887 }
1888 if (vaddr_ef > info->end_data) {
1889 info->end_data = vaddr_ef;
1890 }
1891 if (vaddr_em > info->brk) {
1892 info->brk = vaddr_em;
1893 }
1894 }
bf858897
RH		 1895 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
1896 char *interp_name;
1897
1898 if (*pinterp_name) {
1899 errmsg = "Multiple PT_INTERP entries";
1900 goto exit_errmsg;
1901 }
1902 interp_name = malloc(eppnt->p_filesz);
1903 if (!interp_name) {
1904 goto exit_perror;
1905 }
1906
1907 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
1908 memcpy(interp_name, bprm_buf + eppnt->p_offset,
1909 eppnt->p_filesz);
1910 } else {
1911 retval = pread(image_fd, interp_name, eppnt->p_filesz,
1912 eppnt->p_offset);
1913 if (retval != eppnt->p_filesz) {
1914 goto exit_perror;
1915 }
1916 }
1917 if (interp_name[eppnt->p_filesz - 1] != 0) {
1918 errmsg = "Invalid PT_INTERP entry";
1919 goto exit_errmsg;
1920 }
1921 *pinterp_name = interp_name;
d97ef72e 1922 }
682674b8 1923 }
5fafdf24 1924
8e62a717
RH		 1925 if (info->end_data == 0) {
1926 info->start_data = info->end_code;
1927 info->end_data = info->end_code;
1928 info->brk = info->end_code;
1929 }
1930
682674b8 1931 if (qemu_log_enabled()) {
8e62a717 1932 load_symbols(ehdr, image_fd, load_bias);
682674b8 1933 }
31e31b8a 1934
8e62a717
RH		 1935 close(image_fd);
1936 return;
1937
1938 exit_read:
1939 if (retval >= 0) {
1940 errmsg = "Incomplete read of file header";
1941 goto exit_errmsg;
1942 }
1943 exit_perror:
1944 errmsg = strerror(errno);
1945 exit_errmsg:
1946 fprintf(stderr, "%s: %s\n", image_name, errmsg);
1947 exit(-1);
1948}
1949
1950static void load_elf_interp(const char *filename, struct image_info *info,
1951 char bprm_buf[BPRM_BUF_SIZE])
1952{
1953 int fd, retval;
1954
1955 fd = open(path(filename), O_RDONLY);
1956 if (fd < 0) {
1957 goto exit_perror;
1958 }
31e31b8a 1959
8e62a717
RH		 1960 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
1961 if (retval < 0) {
1962 goto exit_perror;
1963 }
1964 if (retval < BPRM_BUF_SIZE) {
1965 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
1966 }
1967
bf858897 1968 load_elf_image(filename, fd, info, NULL, bprm_buf);
8e62a717
RH		 1969 return;
1970
1971 exit_perror:
1972 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
1973 exit(-1);
31e31b8a
FB		 1974}
1975
49918a75
PB		 1976static int symfind(const void *s0, const void *s1)
1977{
c7c530cd 1978 target_ulong addr = *(target_ulong *)s0;
49918a75
PB		 1979 struct elf_sym *sym = (struct elf_sym *)s1;
1980 int result = 0;
c7c530cd 1981 if (addr < sym->st_value) {
49918a75 1982 result = -1;
c7c530cd 1983 } else if (addr >= sym->st_value + sym->st_size) {
49918a75
PB		 1984 result = 1;
1985 }
1986 return result;
1987}
1988
1989static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
1990{
1991#if ELF_CLASS == ELFCLASS32
1992 struct elf_sym *syms = s->disas_symtab.elf32;
1993#else
1994 struct elf_sym *syms = s->disas_symtab.elf64;
1995#endif
1996
1997 // binary search
49918a75
PB		 1998 struct elf_sym *sym;
1999
c7c530cd 2000 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 2001 if (sym != NULL) {
49918a75
PB		 2002 return s->disas_strtab + sym->st_name;
2003 }
2004
2005 return "";
2006}
2007
2008/* FIXME: This should use elf_ops.h */
2009static int symcmp(const void *s0, const void *s1)
2010{
2011 struct elf_sym *sym0 = (struct elf_sym *)s0;
2012 struct elf_sym *sym1 = (struct elf_sym *)s1;
2013 return (sym0->st_value < sym1->st_value)
2014 ? -1
2015 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2016}
2017
689f936f 2018/* Best attempt to load symbols from this ELF object. */
682674b8 2019static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 2020{
682674b8
RH		 2021 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
2022 struct elf_shdr *shdr;
b9475279
CV		 2023 char *strings = NULL;
2024 struct syminfo *s = NULL;
2025 struct elf_sym *new_syms, *syms = NULL;
689f936f 2026
682674b8
RH		 2027 shnum = hdr->e_shnum;
2028 i = shnum * sizeof(struct elf_shdr);
2029 shdr = (struct elf_shdr *)alloca(i);
2030 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2031 return;
2032 }
2033
2034 bswap_shdr(shdr, shnum);
2035 for (i = 0; i < shnum; ++i) {
2036 if (shdr[i].sh_type == SHT_SYMTAB) {
2037 sym_idx = i;
2038 str_idx = shdr[i].sh_link;
49918a75
PB		 2039 goto found;
2040 }
689f936f 2041 }
682674b8
RH		 2042
2043 /* There will be no symbol table if the file was stripped. */
2044 return;
689f936f
FB		 2045
2046 found:
682674b8 2047 /* Now know where the strtab and symtab are. Snarf them. */
e80cfcfc 2048 s = malloc(sizeof(*s));
682674b8 2049 if (!s) {
b9475279 2050 goto give_up;
682674b8 2051 }
5fafdf24 2052
682674b8
RH		 2053 i = shdr[str_idx].sh_size;
2054 s->disas_strtab = strings = malloc(i);
2055 if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
b9475279 2056 goto give_up;
682674b8 2057 }
49918a75 2058
682674b8
RH		 2059 i = shdr[sym_idx].sh_size;
2060 syms = malloc(i);
2061 if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
b9475279 2062 goto give_up;
682674b8 2063 }
31e31b8a 2064
682674b8
RH		 2065 nsyms = i / sizeof(struct elf_sym);
2066 for (i = 0; i < nsyms; ) {
49918a75 2067 bswap_sym(syms + i);
682674b8
RH		 2068 /* Throw away entries which we do not need. */
2069 if (syms[i].st_shndx == SHN_UNDEF
2070 || syms[i].st_shndx >= SHN_LORESERVE
2071 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2072 if (i < --nsyms) {
49918a75
PB		 2073 syms[i] = syms[nsyms];
2074 }
682674b8 2075 } else {
49918a75 2076#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 2077 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2078 syms[i].st_value &= ~(target_ulong)1;
0774bed1 2079#endif
682674b8
RH		 2080 syms[i].st_value += load_bias;
2081 i++;
2082 }
0774bed1 2083 }
49918a75 2084
b9475279
CV		 2085 /* No "useful" symbol. */
2086 if (nsyms == 0) {
2087 goto give_up;
2088 }
2089
5d5c9930
RH		 2090 /* Attempt to free the storage associated with the local symbols
2091 that we threw away. Whether or not this has any effect on the
2092 memory allocation depends on the malloc implementation and how
2093 many symbols we managed to discard. */
8d79de6e
SW		 2094 new_syms = realloc(syms, nsyms * sizeof(*syms));
2095 if (new_syms == NULL) {
b9475279 2096 goto give_up;
5d5c9930 2097 }
8d79de6e 2098 syms = new_syms;
5d5c9930 2099
49918a75 2100 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 2101
49918a75
PB		 2102 s->disas_num_syms = nsyms;
2103#if ELF_CLASS == ELFCLASS32
2104 s->disas_symtab.elf32 = syms;
49918a75
PB		 2105#else
2106 s->disas_symtab.elf64 = syms;
49918a75 2107#endif
682674b8 2108 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 2109 s->next = syminfos;
2110 syminfos = s;
b9475279
CV		 2111
2112 return;
2113
2114give_up:
2115 free(s);
2116 free(strings);
2117 free(syms);
689f936f 2118}
31e31b8a 2119
f0116c54 2120int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
31e31b8a 2121{
8e62a717 2122 struct image_info interp_info;
31e31b8a 2123 struct elfhdr elf_ex;
8e62a717 2124 char *elf_interpreter = NULL;
31e31b8a 2125
bf858897
RH		 2126 info->start_mmap = (abi_ulong)ELF_START_MMAP;
2127 info->mmap = 0;
2128 info->rss = 0;
2129
2130 load_elf_image(bprm->filename, bprm->fd, info,
2131 &elf_interpreter, bprm->buf);
31e31b8a 2132
bf858897
RH		 2133 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2134 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2135 when we load the interpreter. */
2136 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 2137
e5fe0c52
PB		 2138 bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
2139 bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
2140 bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
2141 if (!bprm->p) {
bf858897
RH		 2142 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2143 exit(-1);
379f6698 2144 }
379f6698 2145
31e31b8a
FB		 2146 /* Do this so that we can load the interpreter, if need be. We will
2147 change some of these later */
31e31b8a 2148 bprm->p = setup_arg_pages(bprm->p, bprm, info);
31e31b8a 2149
8e62a717
RH		 2150 if (elf_interpreter) {
2151 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 2152
8e62a717
RH		 2153 /* If the program interpreter is one of these two, then assume
2154 an iBCS2 image. Otherwise assume a native linux image. */
2155
2156 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2157 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2158 info->personality = PER_SVR4;
31e31b8a 2159
8e62a717
RH		 2160 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2161 and some applications "depend" upon this behavior. Since
2162 we do not have the power to recompile these, we emulate
2163 the SVr4 behavior. Sigh. */
2164 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
2165 MAP_FIXED | MAP_PRIVATE, -1, 0);
2166 }
31e31b8a
FB		 2167 }
2168
8e62a717
RH		 2169 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2170 info, (elf_interpreter ? &interp_info : NULL));
2171 info->start_stack = bprm->p;
2172
2173 /* If we have an interpreter, set that as the program's entry point.
8e78064e 2174 Copy the load_bias as well, to help PPC64 interpret the entry
8e62a717
RH		 2175 point as a function descriptor. Do this after creating elf tables
2176 so that we copy the original program entry point into the AUXV. */
2177 if (elf_interpreter) {
8e78064e 2178 info->load_bias = interp_info.load_bias;
8e62a717 2179 info->entry = interp_info.entry;
bf858897 2180 free(elf_interpreter);
8e62a717 2181 }
31e31b8a 2182
edf8e2af
MW		 2183#ifdef USE_ELF_CORE_DUMP
2184 bprm->core_dump = &elf_core_dump;
2185#endif
2186
31e31b8a
FB		 2187 return 0;
2188}
2189
edf8e2af 2190#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 2191/*
2192 * Definitions to generate Intel SVR4-like core files.
a2547a13 2193 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 2194 * tacked on the front to prevent clashes with linux definitions,
2195 * and the typedef forms have been avoided. This is mostly like
2196 * the SVR4 structure, but more Linuxy, with things that Linux does
2197 * not support and which gdb doesn't really use excluded.
2198 *
2199 * Fields we don't dump (their contents is zero) in linux-user qemu
2200 * are marked with XXX.
2201 *
2202 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2203 *
2204 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 2205 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 2206 * the target resides):
2207 *
2208 * #define USE_ELF_CORE_DUMP
2209 *
2210 * Next you define type of register set used for dumping. ELF specification
2211 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2212 *
c227f099 2213 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 2214 * #define ELF_NREG <number of registers>
c227f099 2215 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 2216 *
edf8e2af
MW		 2217 * Last step is to implement target specific function that copies registers
2218 * from given cpu into just specified register set. Prototype is:
2219 *
c227f099 2220 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
9349b4f9 2221 * const CPUArchState *env);
edf8e2af
MW		 2222 *
2223 * Parameters:
2224 * regs - copy register values into here (allocated and zeroed by caller)
2225 * env - copy registers from here
2226 *
2227 * Example for ARM target is provided in this file.
2228 */
2229
2230/* An ELF note in memory */
2231struct memelfnote {
2232 const char *name;
2233 size_t namesz;
2234 size_t namesz_rounded;
2235 int type;
2236 size_t datasz;
80f5ce75 2237 size_t datasz_rounded;
edf8e2af
MW		 2238 void *data;
2239 size_t notesz;
2240};
2241
a2547a13 2242struct target_elf_siginfo {
f8fd4fc4
PB		 2243 abi_int si_signo; /* signal number */
2244 abi_int si_code; /* extra code */
2245 abi_int si_errno; /* errno */
edf8e2af
MW		 2246};
2247
a2547a13
LD		 2248struct target_elf_prstatus {
2249 struct target_elf_siginfo pr_info; /* Info associated with signal */
1ddd592f 2250 abi_short pr_cursig; /* Current signal */
ca98ac83
PB		 2251 abi_ulong pr_sigpend; /* XXX */
2252 abi_ulong pr_sighold; /* XXX */
c227f099
AL		 2253 target_pid_t pr_pid;
2254 target_pid_t pr_ppid;
2255 target_pid_t pr_pgrp;
2256 target_pid_t pr_sid;
edf8e2af
MW		 2257 struct target_timeval pr_utime; /* XXX User time */
2258 struct target_timeval pr_stime; /* XXX System time */
2259 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2260 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 2261 target_elf_gregset_t pr_reg; /* GP registers */
f8fd4fc4 2262 abi_int pr_fpvalid; /* XXX */
edf8e2af
MW		 2263};
2264
2265#define ELF_PRARGSZ (80) /* Number of chars for args */
2266
a2547a13 2267struct target_elf_prpsinfo {
edf8e2af
MW		 2268 char pr_state; /* numeric process state */
2269 char pr_sname; /* char for pr_state */
2270 char pr_zomb; /* zombie */
2271 char pr_nice; /* nice val */
ca98ac83 2272 abi_ulong pr_flag; /* flags */
c227f099
AL		 2273 target_uid_t pr_uid;
2274 target_gid_t pr_gid;
2275 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af
MW		 2276 /* Lots missing */
2277 char pr_fname[16]; /* filename of executable */
2278 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2279};
2280
2281/* Here is the structure in which status of each thread is captured. */
2282struct elf_thread_status {
72cf2d4f 2283 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 2284 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 2285#if 0
2286 elf_fpregset_t fpu; /* NT_PRFPREG */
2287 struct task_struct *thread;
2288 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2289#endif
2290 struct memelfnote notes[1];
2291 int num_notes;
2292};
2293
2294struct elf_note_info {
2295 struct memelfnote *notes;
a2547a13
LD		 2296 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2297 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 2298
72cf2d4f 2299 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
edf8e2af
MW		 2300#if 0
2301 /*
2302 * Current version of ELF coredump doesn't support
2303 * dumping fp regs etc.
2304 */
2305 elf_fpregset_t *fpu;
2306 elf_fpxregset_t *xfpu;
2307 int thread_status_size;
2308#endif
2309 int notes_size;
2310 int numnote;
2311};
2312
2313struct vm_area_struct {
2314 abi_ulong vma_start; /* start vaddr of memory region */
2315 abi_ulong vma_end; /* end vaddr of memory region */
2316 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 2317 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 2318};
2319
2320struct mm_struct {
72cf2d4f 2321 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 2322 int mm_count; /* number of mappings */
2323};
2324
2325static struct mm_struct *vma_init(void);
2326static void vma_delete(struct mm_struct *);
2327static int vma_add_mapping(struct mm_struct *, abi_ulong,
d97ef72e 2328 abi_ulong, abi_ulong);
edf8e2af
MW		 2329static int vma_get_mapping_count(const struct mm_struct *);
2330static struct vm_area_struct *vma_first(const struct mm_struct *);
2331static struct vm_area_struct *vma_next(struct vm_area_struct *);
2332static abi_ulong vma_dump_size(const struct vm_area_struct *);
b480d9b7 2333static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
d97ef72e 2334 unsigned long flags);
edf8e2af
MW		 2335
2336static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2337static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 2338 unsigned int, void *);
a2547a13
LD		 2339static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2340static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 2341static void fill_auxv_note(struct memelfnote *, const TaskState *);
2342static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2343static size_t note_size(const struct memelfnote *);
2344static void free_note_info(struct elf_note_info *);
9349b4f9
AF		 2345static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2346static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
edf8e2af
MW		 2347static int core_dump_filename(const TaskState *, char *, size_t);
2348
2349static int dump_write(int, const void *, size_t);
2350static int write_note(struct memelfnote *, int);
2351static int write_note_info(struct elf_note_info *, int);
2352
2353#ifdef BSWAP_NEEDED
a2547a13 2354static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af 2355{
ca98ac83
PB		 2356 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2357 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2358 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
edf8e2af 2359 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
ca98ac83
PB		 2360 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2361 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
edf8e2af
MW		 2362 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2363 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2364 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2365 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2366 /* cpu times are not filled, so we skip them */
2367 /* regs should be in correct format already */
2368 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2369}
2370
a2547a13 2371static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af 2372{
ca98ac83 2373 psinfo->pr_flag = tswapal(psinfo->pr_flag);
edf8e2af
MW		 2374 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2375 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2376 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2377 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2378 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2379 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2380}
991f8f0c
RH		 2381
2382static void bswap_note(struct elf_note *en)
2383{
2384 bswap32s(&en->n_namesz);
2385 bswap32s(&en->n_descsz);
2386 bswap32s(&en->n_type);
2387}
2388#else
2389static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2390static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2391static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 2392#endif /* BSWAP_NEEDED */
2393
2394/*
2395 * Minimal support for linux memory regions. These are needed
2396 * when we are finding out what memory exactly belongs to
2397 * emulated process. No locks needed here, as long as
2398 * thread that received the signal is stopped.
2399 */
2400
2401static struct mm_struct *vma_init(void)
2402{
2403 struct mm_struct *mm;
2404
7267c094 2405 if ((mm = g_malloc(sizeof (*mm))) == NULL)
edf8e2af
MW		 2406 return (NULL);
2407
2408 mm->mm_count = 0;
72cf2d4f 2409 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 2410
2411 return (mm);
2412}
2413
2414static void vma_delete(struct mm_struct *mm)
2415{
2416 struct vm_area_struct *vma;
2417
2418 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 2419 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
7267c094 2420 g_free(vma);
edf8e2af 2421 }
7267c094 2422 g_free(mm);
edf8e2af
MW		 2423}
2424
2425static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
d97ef72e 2426 abi_ulong end, abi_ulong flags)
edf8e2af
MW		 2427{
2428 struct vm_area_struct *vma;
2429
7267c094 2430 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
edf8e2af
MW		 2431 return (-1);
2432
2433 vma->vma_start = start;
2434 vma->vma_end = end;
2435 vma->vma_flags = flags;
2436
72cf2d4f 2437 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 2438 mm->mm_count++;
2439
2440 return (0);
2441}
2442
2443static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2444{
72cf2d4f 2445 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 2446}
2447
2448static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2449{
72cf2d4f 2450 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 2451}
2452
2453static int vma_get_mapping_count(const struct mm_struct *mm)
2454{
2455 return (mm->mm_count);
2456}
2457
2458/*
2459 * Calculate file (dump) size of given memory region.
2460 */
2461static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2462{
2463 /* if we cannot even read the first page, skip it */
2464 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2465 return (0);
2466
2467 /*
2468 * Usually we don't dump executable pages as they contain
2469 * non-writable code that debugger can read directly from
2470 * target library etc. However, thread stacks are marked
2471 * also executable so we read in first page of given region
2472 * and check whether it contains elf header. If there is
2473 * no elf header, we dump it.
2474 */
2475 if (vma->vma_flags & PROT_EXEC) {
2476 char page[TARGET_PAGE_SIZE];
2477
2478 copy_from_user(page, vma->vma_start, sizeof (page));
2479 if ((page[EI_MAG0] == ELFMAG0) &&
2480 (page[EI_MAG1] == ELFMAG1) &&
2481 (page[EI_MAG2] == ELFMAG2) &&
2482 (page[EI_MAG3] == ELFMAG3)) {
2483 /*
2484 * Mappings are possibly from ELF binary. Don't dump
2485 * them.
2486 */
2487 return (0);
2488 }
2489 }
2490
2491 return (vma->vma_end - vma->vma_start);
2492}
2493
b480d9b7 2494static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
d97ef72e 2495 unsigned long flags)
edf8e2af
MW		 2496{
2497 struct mm_struct *mm = (struct mm_struct *)priv;
2498
edf8e2af
MW		 2499 vma_add_mapping(mm, start, end, flags);
2500 return (0);
2501}
2502
2503static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 2504 unsigned int sz, void *data)
edf8e2af
MW		 2505{
2506 unsigned int namesz;
2507
2508 namesz = strlen(name) + 1;
2509 note->name = name;
2510 note->namesz = namesz;
2511 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2512 note->type = type;
80f5ce75
LV		 2513 note->datasz = sz;
2514 note->datasz_rounded = roundup(sz, sizeof (int32_t));
2515
edf8e2af
MW		 2516 note->data = data;
2517
2518 /*
2519 * We calculate rounded up note size here as specified by
2520 * ELF document.
2521 */
2522 note->notesz = sizeof (struct elf_note) +
80f5ce75 2523 note->namesz_rounded + note->datasz_rounded;
edf8e2af
MW		 2524}
2525
2526static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 2527 uint32_t flags)
edf8e2af
MW		 2528{
2529 (void) memset(elf, 0, sizeof(*elf));
2530
2531 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2532 elf->e_ident[EI_CLASS] = ELF_CLASS;
2533 elf->e_ident[EI_DATA] = ELF_DATA;
2534 elf->e_ident[EI_VERSION] = EV_CURRENT;
2535 elf->e_ident[EI_OSABI] = ELF_OSABI;
2536
2537 elf->e_type = ET_CORE;
2538 elf->e_machine = machine;
2539 elf->e_version = EV_CURRENT;
2540 elf->e_phoff = sizeof(struct elfhdr);
2541 elf->e_flags = flags;
2542 elf->e_ehsize = sizeof(struct elfhdr);
2543 elf->e_phentsize = sizeof(struct elf_phdr);
2544 elf->e_phnum = segs;
2545
edf8e2af 2546 bswap_ehdr(elf);
edf8e2af
MW		 2547}
2548
2549static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2550{
2551 phdr->p_type = PT_NOTE;
2552 phdr->p_offset = offset;
2553 phdr->p_vaddr = 0;
2554 phdr->p_paddr = 0;
2555 phdr->p_filesz = sz;
2556 phdr->p_memsz = 0;
2557 phdr->p_flags = 0;
2558 phdr->p_align = 0;
2559
991f8f0c 2560 bswap_phdr(phdr, 1);
edf8e2af
MW		 2561}
2562
2563static size_t note_size(const struct memelfnote *note)
2564{
2565 return (note->notesz);
2566}
2567
a2547a13 2568static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 2569 const TaskState *ts, int signr)
edf8e2af
MW		 2570{
2571 (void) memset(prstatus, 0, sizeof (*prstatus));
2572 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2573 prstatus->pr_pid = ts->ts_tid;
2574 prstatus->pr_ppid = getppid();
2575 prstatus->pr_pgrp = getpgrp();
2576 prstatus->pr_sid = getsid(0);
2577
edf8e2af 2578 bswap_prstatus(prstatus);
edf8e2af
MW		 2579}
2580
a2547a13 2581static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af 2582{
900cfbca 2583 char *base_filename;
edf8e2af
MW		 2584 unsigned int i, len;
2585
2586 (void) memset(psinfo, 0, sizeof (*psinfo));
2587
2588 len = ts->info->arg_end - ts->info->arg_start;
2589 if (len >= ELF_PRARGSZ)
2590 len = ELF_PRARGSZ - 1;
2591 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2592 return -EFAULT;
2593 for (i = 0; i < len; i++)
2594 if (psinfo->pr_psargs[i] == 0)
2595 psinfo->pr_psargs[i] = ' ';
2596 psinfo->pr_psargs[len] = 0;
2597
2598 psinfo->pr_pid = getpid();
2599 psinfo->pr_ppid = getppid();
2600 psinfo->pr_pgrp = getpgrp();
2601 psinfo->pr_sid = getsid(0);
2602 psinfo->pr_uid = getuid();
2603 psinfo->pr_gid = getgid();
2604
900cfbca
JM		 2605 base_filename = g_path_get_basename(ts->bprm->filename);
2606 /*
2607 * Using strncpy here is fine: at max-length,
2608 * this field is not NUL-terminated.
2609 */
edf8e2af 2610 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 2611 sizeof(psinfo->pr_fname));
edf8e2af 2612
900cfbca 2613 g_free(base_filename);
edf8e2af 2614 bswap_psinfo(psinfo);
edf8e2af
MW		 2615 return (0);
2616}
2617
2618static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2619{
2620 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2621 elf_addr_t orig_auxv = auxv;
edf8e2af 2622 void *ptr;
125b0f55 2623 int len = ts->info->auxv_len;
edf8e2af
MW		 2624
2625 /*
2626 * Auxiliary vector is stored in target process stack. It contains
2627 * {type, value} pairs that we need to dump into note. This is not
2628 * strictly necessary but we do it here for sake of completeness.
2629 */
2630
edf8e2af
MW		 2631 /* read in whole auxv vector and copy it to memelfnote */
2632 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2633 if (ptr != NULL) {
2634 fill_note(note, "CORE", NT_AUXV, len, ptr);
2635 unlock_user(ptr, auxv, len);
2636 }
2637}
2638
2639/*
2640 * Constructs name of coredump file. We have following convention
2641 * for the name:
2642 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
2643 *
2644 * Returns 0 in case of success, -1 otherwise (errno is set).
2645 */
2646static int core_dump_filename(const TaskState *ts, char *buf,
d97ef72e 2647 size_t bufsize)
edf8e2af
MW		 2648{
2649 char timestamp[64];
2650 char *filename = NULL;
2651 char *base_filename = NULL;
2652 struct timeval tv;
2653 struct tm tm;
2654
2655 assert(bufsize >= PATH_MAX);
2656
2657 if (gettimeofday(&tv, NULL) < 0) {
2658 (void) fprintf(stderr, "unable to get current timestamp: %s",
d97ef72e 2659 strerror(errno));
edf8e2af
MW		 2660 return (-1);
2661 }
2662
2663 filename = strdup(ts->bprm->filename);
2664 base_filename = strdup(basename(filename));
2665 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
d97ef72e 2666 localtime_r(&tv.tv_sec, &tm));
edf8e2af 2667 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
d97ef72e 2668 base_filename, timestamp, (int)getpid());
edf8e2af
MW		 2669 free(base_filename);
2670 free(filename);
2671
2672 return (0);
2673}
2674
2675static int dump_write(int fd, const void *ptr, size_t size)
2676{
2677 const char *bufp = (const char *)ptr;
2678 ssize_t bytes_written, bytes_left;
2679 struct rlimit dumpsize;
2680 off_t pos;
2681
2682 bytes_written = 0;
2683 getrlimit(RLIMIT_CORE, &dumpsize);
2684 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
2685 if (errno == ESPIPE) { /* not a seekable stream */
2686 bytes_left = size;
2687 } else {
2688 return pos;
2689 }
2690 } else {
2691 if (dumpsize.rlim_cur <= pos) {
2692 return -1;
2693 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
2694 bytes_left = size;
2695 } else {
2696 size_t limit_left=dumpsize.rlim_cur - pos;
2697 bytes_left = limit_left >= size ? size : limit_left ;
2698 }
2699 }
2700
2701 /*
2702 * In normal conditions, single write(2) should do but
2703 * in case of socket etc. this mechanism is more portable.
2704 */
2705 do {
2706 bytes_written = write(fd, bufp, bytes_left);
2707 if (bytes_written < 0) {
2708 if (errno == EINTR)
2709 continue;
2710 return (-1);
2711 } else if (bytes_written == 0) { /* eof */
2712 return (-1);
2713 }
2714 bufp += bytes_written;
2715 bytes_left -= bytes_written;
2716 } while (bytes_left > 0);
2717
2718 return (0);
2719}
2720
2721static int write_note(struct memelfnote *men, int fd)
2722{
2723 struct elf_note en;
2724
2725 en.n_namesz = men->namesz;
2726 en.n_type = men->type;
2727 en.n_descsz = men->datasz;
2728
edf8e2af 2729 bswap_note(&en);
edf8e2af
MW		 2730
2731 if (dump_write(fd, &en, sizeof(en)) != 0)
2732 return (-1);
2733 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
2734 return (-1);
80f5ce75 2735 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
edf8e2af
MW		 2736 return (-1);
2737
2738 return (0);
2739}
2740
9349b4f9 2741static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
edf8e2af 2742{
0429a971
AF		 2743 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
2744 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 2745 struct elf_thread_status *ets;
2746
7267c094 2747 ets = g_malloc0(sizeof (*ets));
edf8e2af
MW		 2748 ets->num_notes = 1; /* only prstatus is dumped */
2749 fill_prstatus(&ets->prstatus, ts, 0);
2750 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
2751 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 2752 &ets->prstatus);
edf8e2af 2753
72cf2d4f 2754 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 2755
2756 info->notes_size += note_size(&ets->notes[0]);
2757}
2758
6afafa86
PM		 2759static void init_note_info(struct elf_note_info *info)
2760{
2761 /* Initialize the elf_note_info structure so that it is at
2762 * least safe to call free_note_info() on it. Must be
2763 * called before calling fill_note_info().
2764 */
2765 memset(info, 0, sizeof (*info));
2766 QTAILQ_INIT(&info->thread_list);
2767}
2768
edf8e2af 2769static int fill_note_info(struct elf_note_info *info,
9349b4f9 2770 long signr, const CPUArchState *env)
edf8e2af
MW		 2771{
2772#define NUMNOTES 3
0429a971
AF		 2773 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
2774 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 2775 int i;
2776
7267c094 2777 info->notes = g_malloc0(NUMNOTES * sizeof (struct memelfnote));
edf8e2af
MW		 2778 if (info->notes == NULL)
2779 return (-ENOMEM);
7267c094 2780 info->prstatus = g_malloc0(sizeof (*info->prstatus));
edf8e2af
MW		 2781 if (info->prstatus == NULL)
2782 return (-ENOMEM);
7267c094 2783 info->psinfo = g_malloc0(sizeof (*info->psinfo));
edf8e2af
MW		 2784 if (info->prstatus == NULL)
2785 return (-ENOMEM);
2786
2787 /*
2788 * First fill in status (and registers) of current thread
2789 * including process info & aux vector.
2790 */
2791 fill_prstatus(info->prstatus, ts, signr);
2792 elf_core_copy_regs(&info->prstatus->pr_reg, env);
2793 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 2794 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 2795 fill_psinfo(info->psinfo, ts);
2796 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 2797 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 2798 fill_auxv_note(&info->notes[2], ts);
2799 info->numnote = 3;
2800
2801 info->notes_size = 0;
2802 for (i = 0; i < info->numnote; i++)
2803 info->notes_size += note_size(&info->notes[i]);
2804
2805 /* read and fill status of all threads */
2806 cpu_list_lock();
bdc44640 2807 CPU_FOREACH(cpu) {
a2247f8e 2808 if (cpu == thread_cpu) {
edf8e2af 2809 continue;
182735ef
AF		 2810 }
2811 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
edf8e2af
MW		 2812 }
2813 cpu_list_unlock();
2814
2815 return (0);
2816}
2817
2818static void free_note_info(struct elf_note_info *info)
2819{
2820 struct elf_thread_status *ets;
2821
72cf2d4f
BS		 2822 while (!QTAILQ_EMPTY(&info->thread_list)) {
2823 ets = QTAILQ_FIRST(&info->thread_list);
2824 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
7267c094 2825 g_free(ets);
edf8e2af
MW		 2826 }
2827
7267c094
AL		 2828 g_free(info->prstatus);
2829 g_free(info->psinfo);
2830 g_free(info->notes);
edf8e2af
MW		 2831}
2832
2833static int write_note_info(struct elf_note_info *info, int fd)
2834{
2835 struct elf_thread_status *ets;
2836 int i, error = 0;
2837
2838 /* write prstatus, psinfo and auxv for current thread */
2839 for (i = 0; i < info->numnote; i++)
2840 if ((error = write_note(&info->notes[i], fd)) != 0)
2841 return (error);
2842
2843 /* write prstatus for each thread */
2844 for (ets = info->thread_list.tqh_first; ets != NULL;
d97ef72e 2845 ets = ets->ets_link.tqe_next) {
edf8e2af
MW		 2846 if ((error = write_note(&ets->notes[0], fd)) != 0)
2847 return (error);
2848 }
2849
2850 return (0);
2851}
2852
2853/*
2854 * Write out ELF coredump.
2855 *
2856 * See documentation of ELF object file format in:
2857 * http://www.caldera.com/developers/devspecs/gabi41.pdf
2858 *
2859 * Coredump format in linux is following:
2860 *
2861 * 0 +----------------------+ \
2862 * | ELF header | ET_CORE |
2863 * +----------------------+ |
2864 * | ELF program headers | |--- headers
2865 * | - NOTE section | |
2866 * | - PT_LOAD sections | |
2867 * +----------------------+ /
2868 * | NOTEs: |
2869 * | - NT_PRSTATUS |
2870 * | - NT_PRSINFO |
2871 * | - NT_AUXV |
2872 * +----------------------+ <-- aligned to target page
2873 * | Process memory dump |
2874 * : :
2875 * . .
2876 * : :
2877 * | |
2878 * +----------------------+
2879 *
2880 * NT_PRSTATUS -> struct elf_prstatus (per thread)
2881 * NT_PRSINFO -> struct elf_prpsinfo
2882 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
2883 *
2884 * Format follows System V format as close as possible. Current
2885 * version limitations are as follows:
2886 * - no floating point registers are dumped
2887 *
2888 * Function returns 0 in case of success, negative errno otherwise.
2889 *
2890 * TODO: make this work also during runtime: it should be
2891 * possible to force coredump from running process and then
2892 * continue processing. For example qemu could set up SIGUSR2
2893 * handler (provided that target process haven't registered
2894 * handler for that) that does the dump when signal is received.
2895 */
9349b4f9 2896static int elf_core_dump(int signr, const CPUArchState *env)
edf8e2af 2897{
0429a971
AF		 2898 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
2899 const TaskState *ts = (const TaskState *)cpu->opaque;
edf8e2af
MW		 2900 struct vm_area_struct *vma = NULL;
2901 char corefile[PATH_MAX];
2902 struct elf_note_info info;
2903 struct elfhdr elf;
2904 struct elf_phdr phdr;
2905 struct rlimit dumpsize;
2906 struct mm_struct *mm = NULL;
2907 off_t offset = 0, data_offset = 0;
2908 int segs = 0;
2909 int fd = -1;
2910
6afafa86
PM		 2911 init_note_info(&info);
2912
edf8e2af
MW		 2913 errno = 0;
2914 getrlimit(RLIMIT_CORE, &dumpsize);
2915 if (dumpsize.rlim_cur == 0)
d97ef72e 2916 return 0;
edf8e2af
MW		 2917
2918 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
2919 return (-errno);
2920
2921 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 2922 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 2923 return (-errno);
2924
2925 /*
2926 * Walk through target process memory mappings and
2927 * set up structure containing this information. After
2928 * this point vma_xxx functions can be used.
2929 */
2930 if ((mm = vma_init()) == NULL)
2931 goto out;
2932
2933 walk_memory_regions(mm, vma_walker);
2934 segs = vma_get_mapping_count(mm);
2935
2936 /*
2937 * Construct valid coredump ELF header. We also
2938 * add one more segment for notes.
2939 */
2940 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
2941 if (dump_write(fd, &elf, sizeof (elf)) != 0)
2942 goto out;
2943
2944 /* fill in in-memory version of notes */
2945 if (fill_note_info(&info, signr, env) < 0)
2946 goto out;
2947
2948 offset += sizeof (elf); /* elf header */
2949 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
2950
2951 /* write out notes program header */
2952 fill_elf_note_phdr(&phdr, info.notes_size, offset);
2953
2954 offset += info.notes_size;
2955 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
2956 goto out;
2957
2958 /*
2959 * ELF specification wants data to start at page boundary so
2960 * we align it here.
2961 */
80f5ce75 2962 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
edf8e2af
MW		 2963
2964 /*
2965 * Write program headers for memory regions mapped in
2966 * the target process.
2967 */
2968 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
2969 (void) memset(&phdr, 0, sizeof (phdr));
2970
2971 phdr.p_type = PT_LOAD;
2972 phdr.p_offset = offset;
2973 phdr.p_vaddr = vma->vma_start;
2974 phdr.p_paddr = 0;
2975 phdr.p_filesz = vma_dump_size(vma);
2976 offset += phdr.p_filesz;
2977 phdr.p_memsz = vma->vma_end - vma->vma_start;
2978 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
2979 if (vma->vma_flags & PROT_WRITE)
2980 phdr.p_flags |= PF_W;
2981 if (vma->vma_flags & PROT_EXEC)
2982 phdr.p_flags |= PF_X;
2983 phdr.p_align = ELF_EXEC_PAGESIZE;
2984
80f5ce75 2985 bswap_phdr(&phdr, 1);
edf8e2af
MW		 2986 dump_write(fd, &phdr, sizeof (phdr));
2987 }
2988
2989 /*
2990 * Next we write notes just after program headers. No
2991 * alignment needed here.
2992 */
2993 if (write_note_info(&info, fd) < 0)
2994 goto out;
2995
2996 /* align data to page boundary */
edf8e2af
MW		 2997 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
2998 goto out;
2999
3000 /*
3001 * Finally we can dump process memory into corefile as well.
3002 */
3003 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3004 abi_ulong addr;
3005 abi_ulong end;
3006
3007 end = vma->vma_start + vma_dump_size(vma);
3008
3009 for (addr = vma->vma_start; addr < end;
d97ef72e 3010 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 3011 char page[TARGET_PAGE_SIZE];
3012 int error;
3013
3014 /*
3015 * Read in page from target process memory and
3016 * write it to coredump file.
3017 */
3018 error = copy_from_user(page, addr, sizeof (page));
3019 if (error != 0) {
49995e17 3020 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 3021 addr);
edf8e2af
MW		 3022 errno = -error;
3023 goto out;
3024 }
3025 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3026 goto out;
3027 }
3028 }
3029
d97ef72e 3030 out:
edf8e2af
MW		 3031 free_note_info(&info);
3032 if (mm != NULL)
3033 vma_delete(mm);
3034 (void) close(fd);
3035
3036 if (errno != 0)
3037 return (-errno);
3038 return (0);
3039}
edf8e2af
MW		 3040#endif /* USE_ELF_CORE_DUMP */
3041
e5fe0c52
PB		 3042void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3043{
3044 init_thread(regs, infop);
3045}
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