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RISC-V Linux User Emulation
[qemu.git] / linux-user / elfload.c
CommitLineData
31e31b8a 1/* This is the Linux kernel elf-loading code, ported into user space */
d39594e9 2#include "qemu/osdep.h"
edf8e2af 3#include <sys/param.h>
31e31b8a 4
edf8e2af 5#include <sys/resource.h>
31e31b8a 6
3ef693a0 7#include "qemu.h"
76cad711 8#include "disas/disas.h"
f348b6d1 9#include "qemu/path.h"
31e31b8a 10
e58ffeb3 11#ifdef _ARCH_PPC64
a6cc84f4 12#undef ARCH_DLINFO
13#undef ELF_PLATFORM
14#undef ELF_HWCAP
ad6919dc 15#undef ELF_HWCAP2
a6cc84f4 16#undef ELF_CLASS
17#undef ELF_DATA
18#undef ELF_ARCH
19#endif
20
edf8e2af
MW		 21#define ELF_OSABI ELFOSABI_SYSV
22
cb33da57
BS		 23/* from personality.h */
24
25/*
26 * Flags for bug emulation.
27 *
28 * These occupy the top three bytes.
29 */
30enum {
d97ef72e
RH		 31 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
32 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
33 descriptors (signal handling) */
34 MMAP_PAGE_ZERO = 0x0100000,
35 ADDR_COMPAT_LAYOUT = 0x0200000,
36 READ_IMPLIES_EXEC = 0x0400000,
37 ADDR_LIMIT_32BIT = 0x0800000,
38 SHORT_INODE = 0x1000000,
39 WHOLE_SECONDS = 0x2000000,
40 STICKY_TIMEOUTS = 0x4000000,
41 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 42};
43
44/*
45 * Personality types.
46 *
47 * These go in the low byte. Avoid using the top bit, it will
48 * conflict with error returns.
49 */
50enum {
d97ef72e
RH		 51 PER_LINUX = 0x0000,
52 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
53 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
54 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
55 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
56 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
57 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
58 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
59 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
60 PER_BSD = 0x0006,
61 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
62 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_LINUX32 = 0x0008,
64 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
65 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
66 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
67 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
68 PER_RISCOS = 0x000c,
69 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
70 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
71 PER_OSF4 = 0x000f, /* OSF/1 v4 */
72 PER_HPUX = 0x0010,
73 PER_MASK = 0x00ff,
cb33da57
BS		 74};
75
76/*
77 * Return the base personality without flags.
78 */
d97ef72e 79#define personality(pers) (pers & PER_MASK)
cb33da57 80
83fb7adf
FB		 81/* this flag is uneffective under linux too, should be deleted */
82#ifndef MAP_DENYWRITE
83#define MAP_DENYWRITE 0
84#endif
85
86/* should probably go in elf.h */
87#ifndef ELIBBAD
88#define ELIBBAD 80
89#endif
90
28490231
RH		 91#ifdef TARGET_WORDS_BIGENDIAN
92#define ELF_DATA ELFDATA2MSB
93#else
94#define ELF_DATA ELFDATA2LSB
95#endif
96
a29f998d 97#ifdef TARGET_ABI_MIPSN32
918fc54c
PB		 98typedef abi_ullong target_elf_greg_t;
99#define tswapreg(ptr) tswap64(ptr)
a29f998d
PB		 100#else
101typedef abi_ulong target_elf_greg_t;
102#define tswapreg(ptr) tswapal(ptr)
103#endif
104
21e807fa 105#ifdef USE_UID16
1ddd592f
PB		 106typedef abi_ushort target_uid_t;
107typedef abi_ushort target_gid_t;
21e807fa 108#else
f8fd4fc4
PB		 109typedef abi_uint target_uid_t;
110typedef abi_uint target_gid_t;
21e807fa 111#endif
f8fd4fc4 112typedef abi_int target_pid_t;
21e807fa 113
30ac07d4
FB		 114#ifdef TARGET_I386
115
15338fd7
FB		 116#define ELF_PLATFORM get_elf_platform()
117
118static const char *get_elf_platform(void)
119{
120 static char elf_platform[] = "i386";
a2247f8e 121 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
15338fd7
FB		 122 if (family > 6)
123 family = 6;
124 if (family >= 3)
125 elf_platform[1] = '0' + family;
126 return elf_platform;
127}
128
129#define ELF_HWCAP get_elf_hwcap()
130
131static uint32_t get_elf_hwcap(void)
132{
a2247f8e
AF		 133 X86CPU *cpu = X86_CPU(thread_cpu);
134
135 return cpu->env.features[FEAT_1_EDX];
15338fd7
FB		 136}
137
84409ddb
JM		 138#ifdef TARGET_X86_64
139#define ELF_START_MMAP 0x2aaaaab000ULL
84409ddb
JM		 140
141#define ELF_CLASS ELFCLASS64
84409ddb
JM		 142#define ELF_ARCH EM_X86_64
143
144static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
145{
146 regs->rax = 0;
147 regs->rsp = infop->start_stack;
148 regs->rip = infop->entry;
149}
150
9edc5d79 151#define ELF_NREG 27
c227f099 152typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 153
154/*
155 * Note that ELF_NREG should be 29 as there should be place for
156 * TRAPNO and ERR "registers" as well but linux doesn't dump
157 * those.
158 *
159 * See linux kernel: arch/x86/include/asm/elf.h
160 */
05390248 161static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 162{
163 (*regs)[0] = env->regs[15];
164 (*regs)[1] = env->regs[14];
165 (*regs)[2] = env->regs[13];
166 (*regs)[3] = env->regs[12];
167 (*regs)[4] = env->regs[R_EBP];
168 (*regs)[5] = env->regs[R_EBX];
169 (*regs)[6] = env->regs[11];
170 (*regs)[7] = env->regs[10];
171 (*regs)[8] = env->regs[9];
172 (*regs)[9] = env->regs[8];
173 (*regs)[10] = env->regs[R_EAX];
174 (*regs)[11] = env->regs[R_ECX];
175 (*regs)[12] = env->regs[R_EDX];
176 (*regs)[13] = env->regs[R_ESI];
177 (*regs)[14] = env->regs[R_EDI];
178 (*regs)[15] = env->regs[R_EAX]; /* XXX */
179 (*regs)[16] = env->eip;
180 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
181 (*regs)[18] = env->eflags;
182 (*regs)[19] = env->regs[R_ESP];
183 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
184 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
185 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
186 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
187 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
188 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
189 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
190}
191
84409ddb
JM		 192#else
193
30ac07d4
FB		 194#define ELF_START_MMAP 0x80000000
195
30ac07d4
FB		 196/*
197 * This is used to ensure we don't load something for the wrong architecture.
198 */
199#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
200
201/*
202 * These are used to set parameters in the core dumps.
203 */
d97ef72e 204#define ELF_CLASS ELFCLASS32
d97ef72e 205#define ELF_ARCH EM_386
30ac07d4 206
d97ef72e
RH		 207static inline void init_thread(struct target_pt_regs *regs,
208 struct image_info *infop)
b346ff46
FB		 209{
210 regs->esp = infop->start_stack;
211 regs->eip = infop->entry;
e5fe0c52
PB		 212
213 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
214 starts %edx contains a pointer to a function which might be
215 registered using `atexit'. This provides a mean for the
216 dynamic linker to call DT_FINI functions for shared libraries
217 that have been loaded before the code runs.
218
219 A value of 0 tells we have no such handler. */
220 regs->edx = 0;
b346ff46 221}
9edc5d79 222
9edc5d79 223#define ELF_NREG 17
c227f099 224typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 225
226/*
227 * Note that ELF_NREG should be 19 as there should be place for
228 * TRAPNO and ERR "registers" as well but linux doesn't dump
229 * those.
230 *
231 * See linux kernel: arch/x86/include/asm/elf.h
232 */
05390248 233static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 234{
235 (*regs)[0] = env->regs[R_EBX];
236 (*regs)[1] = env->regs[R_ECX];
237 (*regs)[2] = env->regs[R_EDX];
238 (*regs)[3] = env->regs[R_ESI];
239 (*regs)[4] = env->regs[R_EDI];
240 (*regs)[5] = env->regs[R_EBP];
241 (*regs)[6] = env->regs[R_EAX];
242 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
243 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
244 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
245 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
246 (*regs)[11] = env->regs[R_EAX]; /* XXX */
247 (*regs)[12] = env->eip;
248 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
249 (*regs)[14] = env->eflags;
250 (*regs)[15] = env->regs[R_ESP];
251 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
252}
84409ddb 253#endif
b346ff46 254
9edc5d79 255#define USE_ELF_CORE_DUMP
d97ef72e 256#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 257
258#endif
259
260#ifdef TARGET_ARM
261
24e76ff0
PM		 262#ifndef TARGET_AARCH64
263/* 32 bit ARM definitions */
264
b346ff46
FB		 265#define ELF_START_MMAP 0x80000000
266
b597c3f7 267#define ELF_ARCH EM_ARM
d97ef72e 268#define ELF_CLASS ELFCLASS32
b346ff46 269
d97ef72e
RH		 270static inline void init_thread(struct target_pt_regs *regs,
271 struct image_info *infop)
b346ff46 272{
992f48a0 273 abi_long stack = infop->start_stack;
b346ff46 274 memset(regs, 0, sizeof(*regs));
99033cae 275
167e4cdc
PM		 276 regs->uregs[16] = ARM_CPU_MODE_USR;
277 if (infop->entry & 1) {
278 regs->uregs[16] |= CPSR_T;
279 }
280 regs->uregs[15] = infop->entry & 0xfffffffe;
281 regs->uregs[13] = infop->start_stack;
2f619698 282 /* FIXME - what to for failure of get_user()? */
167e4cdc
PM		 283 get_user_ual(regs->uregs[2], stack + 8); /* envp */
284 get_user_ual(regs->uregs[1], stack + 4); /* envp */
a1516e92 285 /* XXX: it seems that r0 is zeroed after ! */
167e4cdc 286 regs->uregs[0] = 0;
e5fe0c52 287 /* For uClinux PIC binaries. */
863cf0b7 288 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
167e4cdc 289 regs->uregs[10] = infop->start_data;
b346ff46
FB		 290}
291
edf8e2af 292#define ELF_NREG 18
c227f099 293typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 294
05390248 295static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
edf8e2af 296{
86cd7b2d
PB		 297 (*regs)[0] = tswapreg(env->regs[0]);
298 (*regs)[1] = tswapreg(env->regs[1]);
299 (*regs)[2] = tswapreg(env->regs[2]);
300 (*regs)[3] = tswapreg(env->regs[3]);
301 (*regs)[4] = tswapreg(env->regs[4]);
302 (*regs)[5] = tswapreg(env->regs[5]);
303 (*regs)[6] = tswapreg(env->regs[6]);
304 (*regs)[7] = tswapreg(env->regs[7]);
305 (*regs)[8] = tswapreg(env->regs[8]);
306 (*regs)[9] = tswapreg(env->regs[9]);
307 (*regs)[10] = tswapreg(env->regs[10]);
308 (*regs)[11] = tswapreg(env->regs[11]);
309 (*regs)[12] = tswapreg(env->regs[12]);
310 (*regs)[13] = tswapreg(env->regs[13]);
311 (*regs)[14] = tswapreg(env->regs[14]);
312 (*regs)[15] = tswapreg(env->regs[15]);
313
314 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
315 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
edf8e2af
MW		 316}
317
30ac07d4 318#define USE_ELF_CORE_DUMP
d97ef72e 319#define ELF_EXEC_PAGESIZE 4096
30ac07d4 320
afce2927
FB		 321enum
322{
d97ef72e
RH		 323 ARM_HWCAP_ARM_SWP = 1 << 0,
324 ARM_HWCAP_ARM_HALF = 1 << 1,
325 ARM_HWCAP_ARM_THUMB = 1 << 2,
326 ARM_HWCAP_ARM_26BIT = 1 << 3,
327 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
328 ARM_HWCAP_ARM_FPA = 1 << 5,
329 ARM_HWCAP_ARM_VFP = 1 << 6,
330 ARM_HWCAP_ARM_EDSP = 1 << 7,
331 ARM_HWCAP_ARM_JAVA = 1 << 8,
332 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
43ce393e
PM		 333 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
334 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
335 ARM_HWCAP_ARM_NEON = 1 << 12,
336 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
337 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
24682654
PM		 338 ARM_HWCAP_ARM_TLS = 1 << 15,
339 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
340 ARM_HWCAP_ARM_IDIVA = 1 << 17,
341 ARM_HWCAP_ARM_IDIVT = 1 << 18,
342 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
343 ARM_HWCAP_ARM_LPAE = 1 << 20,
344 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
afce2927
FB		 345};
346
ad6919dc
PM		 347enum {
348 ARM_HWCAP2_ARM_AES = 1 << 0,
349 ARM_HWCAP2_ARM_PMULL = 1 << 1,
350 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
351 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
352 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
353};
354
6b1275ff
PM		 355/* The commpage only exists for 32 bit kernels */
356
806d1021
MI		 357#define TARGET_HAS_VALIDATE_GUEST_SPACE
358/* Return 1 if the proposed guest space is suitable for the guest.
359 * Return 0 if the proposed guest space isn't suitable, but another
360 * address space should be tried.
361 * Return -1 if there is no way the proposed guest space can be
362 * valid regardless of the base.
363 * The guest code may leave a page mapped and populate it if the
364 * address is suitable.
365 */
366static int validate_guest_space(unsigned long guest_base,
367 unsigned long guest_size)
97cc7560
DDAG		 368{
369 unsigned long real_start, test_page_addr;
370
371 /* We need to check that we can force a fault on access to the
372 * commpage at 0xffff0fxx
373 */
374 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
806d1021
MI		 375
376 /* If the commpage lies within the already allocated guest space,
377 * then there is no way we can allocate it.
378 */
379 if (test_page_addr >= guest_base
e568f9df 380 && test_page_addr < (guest_base + guest_size)) {
806d1021
MI		 381 return -1;
382 }
383
97cc7560
DDAG		 384 /* Note it needs to be writeable to let us initialise it */
385 real_start = (unsigned long)
386 mmap((void *)test_page_addr, qemu_host_page_size,
387 PROT_READ | PROT_WRITE,
388 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
389
390 /* If we can't map it then try another address */
391 if (real_start == -1ul) {
392 return 0;
393 }
394
395 if (real_start != test_page_addr) {
396 /* OS didn't put the page where we asked - unmap and reject */
397 munmap((void *)real_start, qemu_host_page_size);
398 return 0;
399 }
400
401 /* Leave the page mapped
402 * Populate it (mmap should have left it all 0'd)
403 */
404
405 /* Kernel helper versions */
406 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
407
408 /* Now it's populated make it RO */
409 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
410 perror("Protecting guest commpage");
411 exit(-1);
412 }
413
414 return 1; /* All good */
415}
adf050b1
BC		 416
417#define ELF_HWCAP get_elf_hwcap()
ad6919dc 418#define ELF_HWCAP2 get_elf_hwcap2()
adf050b1
BC		 419
420static uint32_t get_elf_hwcap(void)
421{
a2247f8e 422 ARMCPU *cpu = ARM_CPU(thread_cpu);
adf050b1
BC		 423 uint32_t hwcaps = 0;
424
425 hwcaps |= ARM_HWCAP_ARM_SWP;
426 hwcaps |= ARM_HWCAP_ARM_HALF;
427 hwcaps |= ARM_HWCAP_ARM_THUMB;
428 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
adf050b1
BC		 429
430 /* probe for the extra features */
431#define GET_FEATURE(feat, hwcap) \
a2247f8e 432 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
24682654
PM		 433 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
434 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
adf050b1
BC		 435 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
436 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
437 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
438 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
439 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
24682654
PM		 440 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
441 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
442 GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
443 GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
444 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
445 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
446 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
447 * to our VFP_FP16 feature bit.
448 */
449 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
450 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
adf050b1
BC		 451
452 return hwcaps;
453}
afce2927 454
ad6919dc
PM		 455static uint32_t get_elf_hwcap2(void)
456{
457 ARMCPU *cpu = ARM_CPU(thread_cpu);
458 uint32_t hwcaps = 0;
459
460 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES);
4e624eda 461 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL);
f1ecb913
AB		 462 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1);
463 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2);
ad6919dc
PM		 464 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32);
465 return hwcaps;
466}
467
468#undef GET_FEATURE
469
24e76ff0
PM		 470#else
471/* 64 bit ARM definitions */
472#define ELF_START_MMAP 0x80000000
473
b597c3f7 474#define ELF_ARCH EM_AARCH64
24e76ff0
PM		 475#define ELF_CLASS ELFCLASS64
476#define ELF_PLATFORM "aarch64"
477
478static inline void init_thread(struct target_pt_regs *regs,
479 struct image_info *infop)
480{
481 abi_long stack = infop->start_stack;
482 memset(regs, 0, sizeof(*regs));
483
484 regs->pc = infop->entry & ~0x3ULL;
485 regs->sp = stack;
486}
487
488#define ELF_NREG 34
489typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
490
491static void elf_core_copy_regs(target_elf_gregset_t *regs,
492 const CPUARMState *env)
493{
494 int i;
495
496 for (i = 0; i < 32; i++) {
497 (*regs)[i] = tswapreg(env->xregs[i]);
498 }
499 (*regs)[32] = tswapreg(env->pc);
500 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
501}
502
503#define USE_ELF_CORE_DUMP
504#define ELF_EXEC_PAGESIZE 4096
505
506enum {
507 ARM_HWCAP_A64_FP = 1 << 0,
508 ARM_HWCAP_A64_ASIMD = 1 << 1,
509 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
510 ARM_HWCAP_A64_AES = 1 << 3,
511 ARM_HWCAP_A64_PMULL = 1 << 4,
512 ARM_HWCAP_A64_SHA1 = 1 << 5,
513 ARM_HWCAP_A64_SHA2 = 1 << 6,
514 ARM_HWCAP_A64_CRC32 = 1 << 7,
955f56d4
AB		 515 ARM_HWCAP_A64_ATOMICS = 1 << 8,
516 ARM_HWCAP_A64_FPHP = 1 << 9,
517 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
518 ARM_HWCAP_A64_CPUID = 1 << 11,
519 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
520 ARM_HWCAP_A64_JSCVT = 1 << 13,
521 ARM_HWCAP_A64_FCMA = 1 << 14,
522 ARM_HWCAP_A64_LRCPC = 1 << 15,
523 ARM_HWCAP_A64_DCPOP = 1 << 16,
524 ARM_HWCAP_A64_SHA3 = 1 << 17,
525 ARM_HWCAP_A64_SM3 = 1 << 18,
526 ARM_HWCAP_A64_SM4 = 1 << 19,
527 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
528 ARM_HWCAP_A64_SHA512 = 1 << 21,
529 ARM_HWCAP_A64_SVE = 1 << 22,
24e76ff0
PM		 530};
531
532#define ELF_HWCAP get_elf_hwcap()
533
534static uint32_t get_elf_hwcap(void)
535{
536 ARMCPU *cpu = ARM_CPU(thread_cpu);
537 uint32_t hwcaps = 0;
538
539 hwcaps |= ARM_HWCAP_A64_FP;
540 hwcaps |= ARM_HWCAP_A64_ASIMD;
541
542 /* probe for the extra features */
543#define GET_FEATURE(feat, hwcap) \
544 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
5acc765c 545 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES);
411bdc78 546 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
f6fe04d5
PM		 547 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1);
548 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2);
130f2e7d 549 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
955f56d4
AB		 550 GET_FEATURE(ARM_FEATURE_V8_SHA3, ARM_HWCAP_A64_SHA3);
551 GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3);
552 GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4);
553 GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
201b19d5
PM		 554 GET_FEATURE(ARM_FEATURE_V8_FP16,
555 ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
1dc81c15 556 GET_FEATURE(ARM_FEATURE_V8_RDM, ARM_HWCAP_A64_ASIMDRDM);
0438f037 557 GET_FEATURE(ARM_FEATURE_V8_FCMA, ARM_HWCAP_A64_FCMA);
24e76ff0
PM		 558#undef GET_FEATURE
559
560 return hwcaps;
561}
562
563#endif /* not TARGET_AARCH64 */
564#endif /* TARGET_ARM */
30ac07d4 565
d2fbca94
GX		 566#ifdef TARGET_UNICORE32
567
568#define ELF_START_MMAP 0x80000000
569
d2fbca94
GX		 570#define ELF_CLASS ELFCLASS32
571#define ELF_DATA ELFDATA2LSB
572#define ELF_ARCH EM_UNICORE32
573
574static inline void init_thread(struct target_pt_regs *regs,
575 struct image_info *infop)
576{
577 abi_long stack = infop->start_stack;
578 memset(regs, 0, sizeof(*regs));
579 regs->UC32_REG_asr = 0x10;
580 regs->UC32_REG_pc = infop->entry & 0xfffffffe;
581 regs->UC32_REG_sp = infop->start_stack;
582 /* FIXME - what to for failure of get_user()? */
583 get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */
584 get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */
585 /* XXX: it seems that r0 is zeroed after ! */
586 regs->UC32_REG_00 = 0;
587}
588
589#define ELF_NREG 34
590typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
591
05390248 592static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env)
d2fbca94
GX		 593{
594 (*regs)[0] = env->regs[0];
595 (*regs)[1] = env->regs[1];
596 (*regs)[2] = env->regs[2];
597 (*regs)[3] = env->regs[3];
598 (*regs)[4] = env->regs[4];
599 (*regs)[5] = env->regs[5];
600 (*regs)[6] = env->regs[6];
601 (*regs)[7] = env->regs[7];
602 (*regs)[8] = env->regs[8];
603 (*regs)[9] = env->regs[9];
604 (*regs)[10] = env->regs[10];
605 (*regs)[11] = env->regs[11];
606 (*regs)[12] = env->regs[12];
607 (*regs)[13] = env->regs[13];
608 (*regs)[14] = env->regs[14];
609 (*regs)[15] = env->regs[15];
610 (*regs)[16] = env->regs[16];
611 (*regs)[17] = env->regs[17];
612 (*regs)[18] = env->regs[18];
613 (*regs)[19] = env->regs[19];
614 (*regs)[20] = env->regs[20];
615 (*regs)[21] = env->regs[21];
616 (*regs)[22] = env->regs[22];
617 (*regs)[23] = env->regs[23];
618 (*regs)[24] = env->regs[24];
619 (*regs)[25] = env->regs[25];
620 (*regs)[26] = env->regs[26];
621 (*regs)[27] = env->regs[27];
622 (*regs)[28] = env->regs[28];
623 (*regs)[29] = env->regs[29];
624 (*regs)[30] = env->regs[30];
625 (*regs)[31] = env->regs[31];
626
05390248 627 (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env);
d2fbca94
GX		 628 (*regs)[33] = env->regs[0]; /* XXX */
629}
630
631#define USE_ELF_CORE_DUMP
632#define ELF_EXEC_PAGESIZE 4096
633
634#define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)
635
636#endif
637
853d6f7a 638#ifdef TARGET_SPARC
a315a145 639#ifdef TARGET_SPARC64
853d6f7a
FB		 640
641#define ELF_START_MMAP 0x80000000
cf973e46
AT		 642#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
643 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
992f48a0 644#ifndef TARGET_ABI32
cb33da57 645#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 646#else
647#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
648#endif
853d6f7a 649
a315a145 650#define ELF_CLASS ELFCLASS64
5ef54116
FB		 651#define ELF_ARCH EM_SPARCV9
652
d97ef72e 653#define STACK_BIAS 2047
a315a145 654
d97ef72e
RH		 655static inline void init_thread(struct target_pt_regs *regs,
656 struct image_info *infop)
a315a145 657{
992f48a0 658#ifndef TARGET_ABI32
a315a145 659 regs->tstate = 0;
992f48a0 660#endif
a315a145
FB		 661 regs->pc = infop->entry;
662 regs->npc = regs->pc + 4;
663 regs->y = 0;
992f48a0
BS		 664#ifdef TARGET_ABI32
665 regs->u_regs[14] = infop->start_stack - 16 * 4;
666#else
cb33da57
BS		 667 if (personality(infop->personality) == PER_LINUX32)
668 regs->u_regs[14] = infop->start_stack - 16 * 4;
669 else
670 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
992f48a0 671#endif
a315a145
FB		 672}
673
674#else
675#define ELF_START_MMAP 0x80000000
cf973e46
AT		 676#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
677 | HWCAP_SPARC_MULDIV)
a315a145 678
853d6f7a 679#define ELF_CLASS ELFCLASS32
853d6f7a
FB		 680#define ELF_ARCH EM_SPARC
681
d97ef72e
RH		 682static inline void init_thread(struct target_pt_regs *regs,
683 struct image_info *infop)
853d6f7a 684{
f5155289
FB		 685 regs->psr = 0;
686 regs->pc = infop->entry;
687 regs->npc = regs->pc + 4;
688 regs->y = 0;
689 regs->u_regs[14] = infop->start_stack - 16 * 4;
853d6f7a
FB		 690}
691
a315a145 692#endif
853d6f7a
FB		 693#endif
694
67867308
FB		 695#ifdef TARGET_PPC
696
4ecd4d16 697#define ELF_MACHINE PPC_ELF_MACHINE
67867308
FB		 698#define ELF_START_MMAP 0x80000000
699
e85e7c6e 700#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
84409ddb
JM		 701
702#define elf_check_arch(x) ( (x) == EM_PPC64 )
703
d97ef72e 704#define ELF_CLASS ELFCLASS64
84409ddb
JM		 705
706#else
707
d97ef72e 708#define ELF_CLASS ELFCLASS32
84409ddb
JM		 709
710#endif
711
d97ef72e 712#define ELF_ARCH EM_PPC
67867308 713
df84e4f3
NF		 714/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
715 See arch/powerpc/include/asm/cputable.h. */
716enum {
3efa9a67 717 QEMU_PPC_FEATURE_32 = 0x80000000,
718 QEMU_PPC_FEATURE_64 = 0x40000000,
719 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
720 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
721 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
722 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
723 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
724 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
725 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
726 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
727 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
728 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
729 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
730 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
731 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
732 QEMU_PPC_FEATURE_CELL = 0x00010000,
733 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
734 QEMU_PPC_FEATURE_SMT = 0x00004000,
735 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
736 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
737 QEMU_PPC_FEATURE_PA6T = 0x00000800,
738 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
739 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
740 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
741 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
742 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
743
744 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
745 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
a60438dd
TM		 746
747 /* Feature definitions in AT_HWCAP2. */
748 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
749 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
750 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
751 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
752 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
753 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
df84e4f3
NF		 754};
755
756#define ELF_HWCAP get_elf_hwcap()
757
758static uint32_t get_elf_hwcap(void)
759{
a2247f8e 760 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
df84e4f3
NF		 761 uint32_t features = 0;
762
763 /* We don't have to be terribly complete here; the high points are
764 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 765#define GET_FEATURE(flag, feature) \
a2247f8e 766 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
58eb5308
MW		 767#define GET_FEATURE2(flags, feature) \
768 do { \
769 if ((cpu->env.insns_flags2 & flags) == flags) { \
770 features |= feature; \
771 } \
772 } while (0)
3efa9a67 773 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
774 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
775 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
776 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
777 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
778 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
779 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
780 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
0e019746
TM		 781 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
782 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
783 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
784 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
785 QEMU_PPC_FEATURE_ARCH_2_06);
df84e4f3 786#undef GET_FEATURE
0e019746 787#undef GET_FEATURE2
df84e4f3
NF		 788
789 return features;
790}
791
a60438dd
TM		 792#define ELF_HWCAP2 get_elf_hwcap2()
793
794static uint32_t get_elf_hwcap2(void)
795{
796 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
797 uint32_t features = 0;
798
799#define GET_FEATURE(flag, feature) \
800 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
801#define GET_FEATURE2(flag, feature) \
802 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
803
804 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
805 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
806 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
807 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
808
809#undef GET_FEATURE
810#undef GET_FEATURE2
811
812 return features;
813}
814
f5155289
FB		 815/*
816 * The requirements here are:
817 * - keep the final alignment of sp (sp & 0xf)
818 * - make sure the 32-bit value at the first 16 byte aligned position of
819 * AUXV is greater than 16 for glibc compatibility.
820 * AT_IGNOREPPC is used for that.
821 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
822 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
823 */
0bccf03d 824#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 825#define ARCH_DLINFO \
826 do { \
623e250a 827 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
d97ef72e 828 /* \
82991bed
PM		 829 * Handle glibc compatibility: these magic entries must \
830 * be at the lowest addresses in the final auxv. \
d97ef72e
RH		 831 */ \
832 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
833 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
82991bed
PM		 834 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
835 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
836 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
d97ef72e 837 } while (0)
f5155289 838
67867308
FB		 839static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
840{
67867308 841 _regs->gpr[1] = infop->start_stack;
e85e7c6e 842#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
d90b94cd 843 if (get_ppc64_abi(infop) < 2) {
2ccf97ec
PM		 844 uint64_t val;
845 get_user_u64(val, infop->entry + 8);
846 _regs->gpr[2] = val + infop->load_bias;
847 get_user_u64(val, infop->entry);
848 infop->entry = val + infop->load_bias;
d90b94cd
DK		 849 } else {
850 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
851 }
84409ddb 852#endif
67867308
FB		 853 _regs->nip = infop->entry;
854}
855
e2f3e741
NF		 856/* See linux kernel: arch/powerpc/include/asm/elf.h. */
857#define ELF_NREG 48
858typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
859
05390248 860static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
e2f3e741
NF		 861{
862 int i;
863 target_ulong ccr = 0;
864
865 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
86cd7b2d 866 (*regs)[i] = tswapreg(env->gpr[i]);
e2f3e741
NF		 867 }
868
86cd7b2d
PB		 869 (*regs)[32] = tswapreg(env->nip);
870 (*regs)[33] = tswapreg(env->msr);
871 (*regs)[35] = tswapreg(env->ctr);
872 (*regs)[36] = tswapreg(env->lr);
873 (*regs)[37] = tswapreg(env->xer);
e2f3e741
NF		 874
875 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
876 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
877 }
86cd7b2d 878 (*regs)[38] = tswapreg(ccr);
e2f3e741
NF		 879}
880
881#define USE_ELF_CORE_DUMP
d97ef72e 882#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 883
884#endif
885
048f6b4d
FB		 886#ifdef TARGET_MIPS
887
888#define ELF_START_MMAP 0x80000000
889
388bb21a
TS		 890#ifdef TARGET_MIPS64
891#define ELF_CLASS ELFCLASS64
892#else
048f6b4d 893#define ELF_CLASS ELFCLASS32
388bb21a 894#endif
048f6b4d
FB		 895#define ELF_ARCH EM_MIPS
896
d97ef72e
RH		 897static inline void init_thread(struct target_pt_regs *regs,
898 struct image_info *infop)
048f6b4d 899{
623a930e 900 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 901 regs->cp0_epc = infop->entry;
902 regs->regs[29] = infop->start_stack;
903}
904
51e52606
NF		 905/* See linux kernel: arch/mips/include/asm/elf.h. */
906#define ELF_NREG 45
907typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
908
909/* See linux kernel: arch/mips/include/asm/reg.h. */
910enum {
911#ifdef TARGET_MIPS64
912 TARGET_EF_R0 = 0,
913#else
914 TARGET_EF_R0 = 6,
915#endif
916 TARGET_EF_R26 = TARGET_EF_R0 + 26,
917 TARGET_EF_R27 = TARGET_EF_R0 + 27,
918 TARGET_EF_LO = TARGET_EF_R0 + 32,
919 TARGET_EF_HI = TARGET_EF_R0 + 33,
920 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
921 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
922 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
923 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
924};
925
926/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 927static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
51e52606
NF		 928{
929 int i;
930
931 for (i = 0; i < TARGET_EF_R0; i++) {
932 (*regs)[i] = 0;
933 }
934 (*regs)[TARGET_EF_R0] = 0;
935
936 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
a29f998d 937 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
51e52606
NF		 938 }
939
940 (*regs)[TARGET_EF_R26] = 0;
941 (*regs)[TARGET_EF_R27] = 0;
a29f998d
PB		 942 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
943 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
944 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
945 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
946 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
947 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
51e52606
NF		 948}
949
950#define USE_ELF_CORE_DUMP
388bb21a
TS		 951#define ELF_EXEC_PAGESIZE 4096
952
048f6b4d
FB		 953#endif /* TARGET_MIPS */
954
b779e29e
EI		 955#ifdef TARGET_MICROBLAZE
956
957#define ELF_START_MMAP 0x80000000
958
0d5d4699 959#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 960
961#define ELF_CLASS ELFCLASS32
0d5d4699 962#define ELF_ARCH EM_MICROBLAZE
b779e29e 963
d97ef72e
RH		 964static inline void init_thread(struct target_pt_regs *regs,
965 struct image_info *infop)
b779e29e
EI		 966{
967 regs->pc = infop->entry;
968 regs->r1 = infop->start_stack;
969
970}
971
b779e29e
EI		 972#define ELF_EXEC_PAGESIZE 4096
973
e4cbd44d
EI		 974#define USE_ELF_CORE_DUMP
975#define ELF_NREG 38
976typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
977
978/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 979static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
e4cbd44d
EI		 980{
981 int i, pos = 0;
982
983 for (i = 0; i < 32; i++) {
86cd7b2d 984 (*regs)[pos++] = tswapreg(env->regs[i]);
e4cbd44d
EI		 985 }
986
987 for (i = 0; i < 6; i++) {
86cd7b2d 988 (*regs)[pos++] = tswapreg(env->sregs[i]);
e4cbd44d
EI		 989 }
990}
991
b779e29e
EI		 992#endif /* TARGET_MICROBLAZE */
993
a0a839b6
MV		 994#ifdef TARGET_NIOS2
995
996#define ELF_START_MMAP 0x80000000
997
998#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
999
1000#define ELF_CLASS ELFCLASS32
1001#define ELF_ARCH EM_ALTERA_NIOS2
1002
1003static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1004{
1005 regs->ea = infop->entry;
1006 regs->sp = infop->start_stack;
1007 regs->estatus = 0x3;
1008}
1009
1010#define ELF_EXEC_PAGESIZE 4096
1011
1012#define USE_ELF_CORE_DUMP
1013#define ELF_NREG 49
1014typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1015
1016/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1017static void elf_core_copy_regs(target_elf_gregset_t *regs,
1018 const CPUNios2State *env)
1019{
1020 int i;
1021
1022 (*regs)[0] = -1;
1023 for (i = 1; i < 8; i++) /* r0-r7 */
1024 (*regs)[i] = tswapreg(env->regs[i + 7]);
1025
1026 for (i = 8; i < 16; i++) /* r8-r15 */
1027 (*regs)[i] = tswapreg(env->regs[i - 8]);
1028
1029 for (i = 16; i < 24; i++) /* r16-r23 */
1030 (*regs)[i] = tswapreg(env->regs[i + 7]);
1031 (*regs)[24] = -1; /* R_ET */
1032 (*regs)[25] = -1; /* R_BT */
1033 (*regs)[26] = tswapreg(env->regs[R_GP]);
1034 (*regs)[27] = tswapreg(env->regs[R_SP]);
1035 (*regs)[28] = tswapreg(env->regs[R_FP]);
1036 (*regs)[29] = tswapreg(env->regs[R_EA]);
1037 (*regs)[30] = -1; /* R_SSTATUS */
1038 (*regs)[31] = tswapreg(env->regs[R_RA]);
1039
1040 (*regs)[32] = tswapreg(env->regs[R_PC]);
1041
1042 (*regs)[33] = -1; /* R_STATUS */
1043 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1044
1045 for (i = 35; i < 49; i++) /* ... */
1046 (*regs)[i] = -1;
1047}
1048
1049#endif /* TARGET_NIOS2 */
1050
d962783e
JL		 1051#ifdef TARGET_OPENRISC
1052
1053#define ELF_START_MMAP 0x08000000
1054
d962783e
JL		 1055#define ELF_ARCH EM_OPENRISC
1056#define ELF_CLASS ELFCLASS32
1057#define ELF_DATA ELFDATA2MSB
1058
1059static inline void init_thread(struct target_pt_regs *regs,
1060 struct image_info *infop)
1061{
1062 regs->pc = infop->entry;
1063 regs->gpr[1] = infop->start_stack;
1064}
1065
1066#define USE_ELF_CORE_DUMP
1067#define ELF_EXEC_PAGESIZE 8192
1068
1069/* See linux kernel arch/openrisc/include/asm/elf.h. */
1070#define ELF_NREG 34 /* gprs and pc, sr */
1071typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1072
1073static void elf_core_copy_regs(target_elf_gregset_t *regs,
1074 const CPUOpenRISCState *env)
1075{
1076 int i;
1077
1078 for (i = 0; i < 32; i++) {
d89e71e8 1079 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
d962783e 1080 }
86cd7b2d 1081 (*regs)[32] = tswapreg(env->pc);
84775c43 1082 (*regs)[33] = tswapreg(cpu_get_sr(env));
d962783e
JL		 1083}
1084#define ELF_HWCAP 0
1085#define ELF_PLATFORM NULL
1086
1087#endif /* TARGET_OPENRISC */
1088
fdf9b3e8
FB		 1089#ifdef TARGET_SH4
1090
1091#define ELF_START_MMAP 0x80000000
1092
fdf9b3e8 1093#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 1094#define ELF_ARCH EM_SH
1095
d97ef72e
RH		 1096static inline void init_thread(struct target_pt_regs *regs,
1097 struct image_info *infop)
fdf9b3e8 1098{
d97ef72e
RH		 1099 /* Check other registers XXXXX */
1100 regs->pc = infop->entry;
1101 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 1102}
1103
7631c97e
NF		 1104/* See linux kernel: arch/sh/include/asm/elf.h. */
1105#define ELF_NREG 23
1106typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1107
1108/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1109enum {
1110 TARGET_REG_PC = 16,
1111 TARGET_REG_PR = 17,
1112 TARGET_REG_SR = 18,
1113 TARGET_REG_GBR = 19,
1114 TARGET_REG_MACH = 20,
1115 TARGET_REG_MACL = 21,
1116 TARGET_REG_SYSCALL = 22
1117};
1118
d97ef72e 1119static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
05390248 1120 const CPUSH4State *env)
7631c97e
NF		 1121{
1122 int i;
1123
1124 for (i = 0; i < 16; i++) {
72cd500b 1125 (*regs)[i] = tswapreg(env->gregs[i]);
7631c97e
NF		 1126 }
1127
86cd7b2d
PB		 1128 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1129 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1130 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1131 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1132 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1133 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
7631c97e
NF		 1134 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1135}
1136
1137#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 1138#define ELF_EXEC_PAGESIZE 4096
1139
e42fd944
RH		 1140enum {
1141 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1142 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1143 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1144 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1145 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1146 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1147 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1148 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1149 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1150 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1151};
1152
1153#define ELF_HWCAP get_elf_hwcap()
1154
1155static uint32_t get_elf_hwcap(void)
1156{
1157 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1158 uint32_t hwcap = 0;
1159
1160 hwcap |= SH_CPU_HAS_FPU;
1161
1162 if (cpu->env.features & SH_FEATURE_SH4A) {
1163 hwcap |= SH_CPU_HAS_LLSC;
1164 }
1165
1166 return hwcap;
1167}
1168
fdf9b3e8
FB		 1169#endif
1170
48733d19
TS		 1171#ifdef TARGET_CRIS
1172
1173#define ELF_START_MMAP 0x80000000
1174
48733d19 1175#define ELF_CLASS ELFCLASS32
48733d19
TS		 1176#define ELF_ARCH EM_CRIS
1177
d97ef72e
RH		 1178static inline void init_thread(struct target_pt_regs *regs,
1179 struct image_info *infop)
48733d19 1180{
d97ef72e 1181 regs->erp = infop->entry;
48733d19
TS		 1182}
1183
48733d19
TS		 1184#define ELF_EXEC_PAGESIZE 8192
1185
1186#endif
1187
e6e5906b
PB		 1188#ifdef TARGET_M68K
1189
1190#define ELF_START_MMAP 0x80000000
1191
d97ef72e 1192#define ELF_CLASS ELFCLASS32
d97ef72e 1193#define ELF_ARCH EM_68K
e6e5906b
PB		 1194
1195/* ??? Does this need to do anything?
d97ef72e 1196 #define ELF_PLAT_INIT(_r) */
e6e5906b 1197
d97ef72e
RH		 1198static inline void init_thread(struct target_pt_regs *regs,
1199 struct image_info *infop)
e6e5906b
PB		 1200{
1201 regs->usp = infop->start_stack;
1202 regs->sr = 0;
1203 regs->pc = infop->entry;
1204}
1205
7a93cc55
NF		 1206/* See linux kernel: arch/m68k/include/asm/elf.h. */
1207#define ELF_NREG 20
1208typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1209
05390248 1210static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
7a93cc55 1211{
86cd7b2d
PB		 1212 (*regs)[0] = tswapreg(env->dregs[1]);
1213 (*regs)[1] = tswapreg(env->dregs[2]);
1214 (*regs)[2] = tswapreg(env->dregs[3]);
1215 (*regs)[3] = tswapreg(env->dregs[4]);
1216 (*regs)[4] = tswapreg(env->dregs[5]);
1217 (*regs)[5] = tswapreg(env->dregs[6]);
1218 (*regs)[6] = tswapreg(env->dregs[7]);
1219 (*regs)[7] = tswapreg(env->aregs[0]);
1220 (*regs)[8] = tswapreg(env->aregs[1]);
1221 (*regs)[9] = tswapreg(env->aregs[2]);
1222 (*regs)[10] = tswapreg(env->aregs[3]);
1223 (*regs)[11] = tswapreg(env->aregs[4]);
1224 (*regs)[12] = tswapreg(env->aregs[5]);
1225 (*regs)[13] = tswapreg(env->aregs[6]);
1226 (*regs)[14] = tswapreg(env->dregs[0]);
1227 (*regs)[15] = tswapreg(env->aregs[7]);
1228 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1229 (*regs)[17] = tswapreg(env->sr);
1230 (*regs)[18] = tswapreg(env->pc);
7a93cc55
NF		 1231 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1232}
1233
1234#define USE_ELF_CORE_DUMP
d97ef72e 1235#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 1236
1237#endif
1238
7a3148a9
JM		 1239#ifdef TARGET_ALPHA
1240
1241#define ELF_START_MMAP (0x30000000000ULL)
1242
7a3148a9 1243#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 1244#define ELF_ARCH EM_ALPHA
1245
d97ef72e
RH		 1246static inline void init_thread(struct target_pt_regs *regs,
1247 struct image_info *infop)
7a3148a9
JM		 1248{
1249 regs->pc = infop->entry;
1250 regs->ps = 8;
1251 regs->usp = infop->start_stack;
7a3148a9
JM		 1252}
1253
7a3148a9
JM		 1254#define ELF_EXEC_PAGESIZE 8192
1255
1256#endif /* TARGET_ALPHA */
1257
a4c075f1
UH		 1258#ifdef TARGET_S390X
1259
1260#define ELF_START_MMAP (0x20000000000ULL)
1261
a4c075f1
UH		 1262#define ELF_CLASS ELFCLASS64
1263#define ELF_DATA ELFDATA2MSB
1264#define ELF_ARCH EM_S390
1265
1266static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1267{
1268 regs->psw.addr = infop->entry;
1269 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1270 regs->gprs[15] = infop->start_stack;
1271}
1272
1273#endif /* TARGET_S390X */
1274
b16189b2
CG		 1275#ifdef TARGET_TILEGX
1276
1277/* 42 bits real used address, a half for user mode */
1278#define ELF_START_MMAP (0x00000020000000000ULL)
1279
1280#define elf_check_arch(x) ((x) == EM_TILEGX)
1281
1282#define ELF_CLASS ELFCLASS64
1283#define ELF_DATA ELFDATA2LSB
1284#define ELF_ARCH EM_TILEGX
1285
1286static inline void init_thread(struct target_pt_regs *regs,
1287 struct image_info *infop)
1288{
1289 regs->pc = infop->entry;
1290 regs->sp = infop->start_stack;
1291
1292}
1293
1294#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1295
1296#endif /* TARGET_TILEGX */
1297
47ae93cd
MC		 1298#ifdef TARGET_RISCV
1299
1300#define ELF_START_MMAP 0x80000000
1301#define ELF_ARCH EM_RISCV
1302
1303#ifdef TARGET_RISCV32
1304#define ELF_CLASS ELFCLASS32
1305#else
1306#define ELF_CLASS ELFCLASS64
1307#endif
1308
1309static inline void init_thread(struct target_pt_regs *regs,
1310 struct image_info *infop)
1311{
1312 regs->sepc = infop->entry;
1313 regs->sp = infop->start_stack;
1314}
1315
1316#define ELF_EXEC_PAGESIZE 4096
1317
1318#endif /* TARGET_RISCV */
1319
7c248bcd
RH		 1320#ifdef TARGET_HPPA
1321
1322#define ELF_START_MMAP 0x80000000
1323#define ELF_CLASS ELFCLASS32
1324#define ELF_ARCH EM_PARISC
1325#define ELF_PLATFORM "PARISC"
1326#define STACK_GROWS_DOWN 0
1327#define STACK_ALIGNMENT 64
1328
1329static inline void init_thread(struct target_pt_regs *regs,
1330 struct image_info *infop)
1331{
1332 regs->iaoq[0] = infop->entry;
1333 regs->iaoq[1] = infop->entry + 4;
1334 regs->gr[23] = 0;
1335 regs->gr[24] = infop->arg_start;
1336 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1337 /* The top-of-stack contains a linkage buffer. */
1338 regs->gr[30] = infop->start_stack + 64;
1339 regs->gr[31] = infop->entry;
1340}
1341
1342#endif /* TARGET_HPPA */
1343
15338fd7
FB		 1344#ifndef ELF_PLATFORM
1345#define ELF_PLATFORM (NULL)
1346#endif
1347
75be901c
PC		 1348#ifndef ELF_MACHINE
1349#define ELF_MACHINE ELF_ARCH
1350#endif
1351
d276a604
PC		 1352#ifndef elf_check_arch
1353#define elf_check_arch(x) ((x) == ELF_ARCH)
1354#endif
1355
15338fd7
FB		 1356#ifndef ELF_HWCAP
1357#define ELF_HWCAP 0
1358#endif
1359
7c4ee5bc
RH		 1360#ifndef STACK_GROWS_DOWN
1361#define STACK_GROWS_DOWN 1
1362#endif
1363
1364#ifndef STACK_ALIGNMENT
1365#define STACK_ALIGNMENT 16
1366#endif
1367
992f48a0 1368#ifdef TARGET_ABI32
cb33da57 1369#undef ELF_CLASS
992f48a0 1370#define ELF_CLASS ELFCLASS32
cb33da57
BS		 1371#undef bswaptls
1372#define bswaptls(ptr) bswap32s(ptr)
1373#endif
1374
31e31b8a 1375#include "elf.h"
09bfb054 1376
09bfb054
FB		 1377struct exec
1378{
d97ef72e
RH		 1379 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1380 unsigned int a_text; /* length of text, in bytes */
1381 unsigned int a_data; /* length of data, in bytes */
1382 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1383 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1384 unsigned int a_entry; /* start address */
1385 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1386 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 1387};
1388
1389
1390#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1391#define OMAGIC 0407
1392#define NMAGIC 0410
1393#define ZMAGIC 0413
1394#define QMAGIC 0314
1395
31e31b8a 1396/* Necessary parameters */
54936004 1397#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
79cb1f1d
YK		 1398#define TARGET_ELF_PAGESTART(_v) ((_v) & \
1399 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
54936004 1400#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 1401
444cd5c3 1402#define DLINFO_ITEMS 15
31e31b8a 1403
09bfb054
FB		 1404static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1405{
d97ef72e 1406 memcpy(to, from, n);
09bfb054 1407}
d691f669 1408
31e31b8a 1409#ifdef BSWAP_NEEDED
92a31b1f 1410static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 1411{
d97ef72e
RH		 1412 bswap16s(&ehdr->e_type); /* Object file type */
1413 bswap16s(&ehdr->e_machine); /* Architecture */
1414 bswap32s(&ehdr->e_version); /* Object file version */
1415 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1416 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1417 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1418 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1419 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1420 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1421 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1422 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1423 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1424 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 1425}
1426
991f8f0c 1427static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 1428{
991f8f0c
RH		 1429 int i;
1430 for (i = 0; i < phnum; ++i, ++phdr) {
1431 bswap32s(&phdr->p_type); /* Segment type */
1432 bswap32s(&phdr->p_flags); /* Segment flags */
1433 bswaptls(&phdr->p_offset); /* Segment file offset */
1434 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1435 bswaptls(&phdr->p_paddr); /* Segment physical address */
1436 bswaptls(&phdr->p_filesz); /* Segment size in file */
1437 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1438 bswaptls(&phdr->p_align); /* Segment alignment */
1439 }
31e31b8a 1440}
689f936f 1441
991f8f0c 1442static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 1443{
991f8f0c
RH		 1444 int i;
1445 for (i = 0; i < shnum; ++i, ++shdr) {
1446 bswap32s(&shdr->sh_name);
1447 bswap32s(&shdr->sh_type);
1448 bswaptls(&shdr->sh_flags);
1449 bswaptls(&shdr->sh_addr);
1450 bswaptls(&shdr->sh_offset);
1451 bswaptls(&shdr->sh_size);
1452 bswap32s(&shdr->sh_link);
1453 bswap32s(&shdr->sh_info);
1454 bswaptls(&shdr->sh_addralign);
1455 bswaptls(&shdr->sh_entsize);
1456 }
689f936f
FB		 1457}
1458
7a3148a9 1459static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 1460{
1461 bswap32s(&sym->st_name);
7a3148a9
JM		 1462 bswaptls(&sym->st_value);
1463 bswaptls(&sym->st_size);
689f936f
FB		 1464 bswap16s(&sym->st_shndx);
1465}
991f8f0c
RH		 1466#else
1467static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1468static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1469static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1470static inline void bswap_sym(struct elf_sym *sym) { }
31e31b8a
FB		 1471#endif
1472
edf8e2af 1473#ifdef USE_ELF_CORE_DUMP
9349b4f9 1474static int elf_core_dump(int, const CPUArchState *);
edf8e2af 1475#endif /* USE_ELF_CORE_DUMP */
682674b8 1476static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 1477
9058abdd
RH		 1478/* Verify the portions of EHDR within E_IDENT for the target.
1479 This can be performed before bswapping the entire header. */
1480static bool elf_check_ident(struct elfhdr *ehdr)
1481{
1482 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1483 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1484 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1485 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1486 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1487 && ehdr->e_ident[EI_DATA] == ELF_DATA
1488 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1489}
1490
1491/* Verify the portions of EHDR outside of E_IDENT for the target.
1492 This has to wait until after bswapping the header. */
1493static bool elf_check_ehdr(struct elfhdr *ehdr)
1494{
1495 return (elf_check_arch(ehdr->e_machine)
1496 && ehdr->e_ehsize == sizeof(struct elfhdr)
1497 && ehdr->e_phentsize == sizeof(struct elf_phdr)
9058abdd
RH		 1498 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1499}
1500
31e31b8a 1501/*
e5fe0c52 1502 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 1503 * memory to free pages in kernel mem. These are in a format ready
1504 * to be put directly into the top of new user memory.
1505 *
1506 */
59baae9a
SB		 1507static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1508 abi_ulong p, abi_ulong stack_limit)
31e31b8a 1509{
59baae9a 1510 char *tmp;
7c4ee5bc 1511 int len, i;
59baae9a 1512 abi_ulong top = p;
31e31b8a
FB		 1513
1514 if (!p) {
d97ef72e 1515 return 0; /* bullet-proofing */
31e31b8a 1516 }
59baae9a 1517
7c4ee5bc
RH		 1518 if (STACK_GROWS_DOWN) {
1519 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1520 for (i = argc - 1; i >= 0; --i) {
1521 tmp = argv[i];
1522 if (!tmp) {
1523 fprintf(stderr, "VFS: argc is wrong");
1524 exit(-1);
1525 }
1526 len = strlen(tmp) + 1;
1527 tmp += len;
59baae9a 1528
7c4ee5bc
RH		 1529 if (len > (p - stack_limit)) {
1530 return 0;
1531 }
1532 while (len) {
1533 int bytes_to_copy = (len > offset) ? offset : len;
1534 tmp -= bytes_to_copy;
1535 p -= bytes_to_copy;
1536 offset -= bytes_to_copy;
1537 len -= bytes_to_copy;
1538
1539 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1540
1541 if (offset == 0) {
1542 memcpy_to_target(p, scratch, top - p);
1543 top = p;
1544 offset = TARGET_PAGE_SIZE;
1545 }
1546 }
d97ef72e 1547 }
7c4ee5bc
RH		 1548 if (p != top) {
1549 memcpy_to_target(p, scratch + offset, top - p);
d97ef72e 1550 }
7c4ee5bc
RH		 1551 } else {
1552 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1553 for (i = 0; i < argc; ++i) {
1554 tmp = argv[i];
1555 if (!tmp) {
1556 fprintf(stderr, "VFS: argc is wrong");
1557 exit(-1);
1558 }
1559 len = strlen(tmp) + 1;
1560 if (len > (stack_limit - p)) {
1561 return 0;
1562 }
1563 while (len) {
1564 int bytes_to_copy = (len > remaining) ? remaining : len;
1565
1566 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1567
1568 tmp += bytes_to_copy;
1569 remaining -= bytes_to_copy;
1570 p += bytes_to_copy;
1571 len -= bytes_to_copy;
1572
1573 if (remaining == 0) {
1574 memcpy_to_target(top, scratch, p - top);
1575 top = p;
1576 remaining = TARGET_PAGE_SIZE;
1577 }
d97ef72e
RH		 1578 }
1579 }
7c4ee5bc
RH		 1580 if (p != top) {
1581 memcpy_to_target(top, scratch, p - top);
1582 }
59baae9a
SB		 1583 }
1584
31e31b8a
FB		 1585 return p;
1586}
1587
59baae9a
SB		 1588/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1589 * argument/environment space. Newer kernels (>2.6.33) allow more,
1590 * dependent on stack size, but guarantee at least 32 pages for
1591 * backwards compatibility.
1592 */
1593#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1594
1595static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
992f48a0 1596 struct image_info *info)
53a5960a 1597{
59baae9a 1598 abi_ulong size, error, guard;
31e31b8a 1599
703e0e89 1600 size = guest_stack_size;
59baae9a
SB		 1601 if (size < STACK_LOWER_LIMIT) {
1602 size = STACK_LOWER_LIMIT;
60dcbcb5
RH		 1603 }
1604 guard = TARGET_PAGE_SIZE;
1605 if (guard < qemu_real_host_page_size) {
1606 guard = qemu_real_host_page_size;
1607 }
1608
1609 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1610 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1611 if (error == -1) {
60dcbcb5 1612 perror("mmap stack");
09bfb054
FB		 1613 exit(-1);
1614 }
31e31b8a 1615
60dcbcb5 1616 /* We reserve one extra page at the top of the stack as guard. */
7c4ee5bc
RH		 1617 if (STACK_GROWS_DOWN) {
1618 target_mprotect(error, guard, PROT_NONE);
1619 info->stack_limit = error + guard;
1620 return info->stack_limit + size - sizeof(void *);
1621 } else {
1622 target_mprotect(error + size, guard, PROT_NONE);
1623 info->stack_limit = error + size;
1624 return error;
1625 }
31e31b8a
FB		 1626}
1627
cf129f3a
RH		 1628/* Map and zero the bss. We need to explicitly zero any fractional pages
1629 after the data section (i.e. bss). */
1630static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1631{
cf129f3a
RH		 1632 uintptr_t host_start, host_map_start, host_end;
1633
1634 last_bss = TARGET_PAGE_ALIGN(last_bss);
1635
1636 /* ??? There is confusion between qemu_real_host_page_size and
1637 qemu_host_page_size here and elsewhere in target_mmap, which
1638 may lead to the end of the data section mapping from the file
1639 not being mapped. At least there was an explicit test and
1640 comment for that here, suggesting that "the file size must
1641 be known". The comment probably pre-dates the introduction
1642 of the fstat system call in target_mmap which does in fact
1643 find out the size. What isn't clear is if the workaround
1644 here is still actually needed. For now, continue with it,
1645 but merge it with the "normal" mmap that would allocate the bss. */
1646
1647 host_start = (uintptr_t) g2h(elf_bss);
1648 host_end = (uintptr_t) g2h(last_bss);
0c2d70c4 1649 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
cf129f3a
RH		 1650
1651 if (host_map_start < host_end) {
1652 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1653 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1654 if (p == MAP_FAILED) {
1655 perror("cannot mmap brk");
1656 exit(-1);
853d6f7a 1657 }
f46e9a0b 1658 }
853d6f7a 1659
f46e9a0b
TM		 1660 /* Ensure that the bss page(s) are valid */
1661 if ((page_get_flags(last_bss-1) & prot) != prot) {
1662 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
cf129f3a 1663 }
31e31b8a 1664
cf129f3a
RH		 1665 if (host_start < host_map_start) {
1666 memset((void *)host_start, 0, host_map_start - host_start);
1667 }
1668}
53a5960a 1669
1af02e83
MF		 1670#ifdef CONFIG_USE_FDPIC
1671static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1672{
1673 uint16_t n;
1674 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1675
1676 /* elf32_fdpic_loadseg */
1677 n = info->nsegs;
1678 while (n--) {
1679 sp -= 12;
1680 put_user_u32(loadsegs[n].addr, sp+0);
1681 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1682 put_user_u32(loadsegs[n].p_memsz, sp+8);
1683 }
1684
1685 /* elf32_fdpic_loadmap */
1686 sp -= 4;
1687 put_user_u16(0, sp+0); /* version */
1688 put_user_u16(info->nsegs, sp+2); /* nsegs */
1689
1690 info->personality = PER_LINUX_FDPIC;
1691 info->loadmap_addr = sp;
1692
1693 return sp;
1694}
1695#endif
1696
992f48a0 1697static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 1698 struct elfhdr *exec,
1699 struct image_info *info,
1700 struct image_info *interp_info)
31e31b8a 1701{
d97ef72e 1702 abi_ulong sp;
7c4ee5bc 1703 abi_ulong u_argc, u_argv, u_envp, u_auxv;
d97ef72e 1704 int size;
14322bad
LA		 1705 int i;
1706 abi_ulong u_rand_bytes;
1707 uint8_t k_rand_bytes[16];
d97ef72e
RH		 1708 abi_ulong u_platform;
1709 const char *k_platform;
1710 const int n = sizeof(elf_addr_t);
1711
1712 sp = p;
1af02e83
MF		 1713
1714#ifdef CONFIG_USE_FDPIC
1715 /* Needs to be before we load the env/argc/... */
1716 if (elf_is_fdpic(exec)) {
1717 /* Need 4 byte alignment for these structs */
1718 sp &= ~3;
1719 sp = loader_build_fdpic_loadmap(info, sp);
1720 info->other_info = interp_info;
1721 if (interp_info) {
1722 interp_info->other_info = info;
1723 sp = loader_build_fdpic_loadmap(interp_info, sp);
1724 }
1725 }
1726#endif
1727
d97ef72e
RH		 1728 u_platform = 0;
1729 k_platform = ELF_PLATFORM;
1730 if (k_platform) {
1731 size_t len = strlen(k_platform) + 1;
7c4ee5bc
RH		 1732 if (STACK_GROWS_DOWN) {
1733 sp -= (len + n - 1) & ~(n - 1);
1734 u_platform = sp;
1735 /* FIXME - check return value of memcpy_to_target() for failure */
1736 memcpy_to_target(sp, k_platform, len);
1737 } else {
1738 memcpy_to_target(sp, k_platform, len);
1739 u_platform = sp;
1740 sp += len + 1;
1741 }
1742 }
1743
1744 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1745 * the argv and envp pointers.
1746 */
1747 if (STACK_GROWS_DOWN) {
1748 sp = QEMU_ALIGN_DOWN(sp, 16);
1749 } else {
1750 sp = QEMU_ALIGN_UP(sp, 16);
d97ef72e 1751 }
14322bad
LA		 1752
1753 /*
1754 * Generate 16 random bytes for userspace PRNG seeding (not
1755 * cryptically secure but it's not the aim of QEMU).
1756 */
14322bad
LA		 1757 for (i = 0; i < 16; i++) {
1758 k_rand_bytes[i] = rand();
1759 }
7c4ee5bc
RH		 1760 if (STACK_GROWS_DOWN) {
1761 sp -= 16;
1762 u_rand_bytes = sp;
1763 /* FIXME - check return value of memcpy_to_target() for failure */
1764 memcpy_to_target(sp, k_rand_bytes, 16);
1765 } else {
1766 memcpy_to_target(sp, k_rand_bytes, 16);
1767 u_rand_bytes = sp;
1768 sp += 16;
1769 }
14322bad 1770
d97ef72e
RH		 1771 size = (DLINFO_ITEMS + 1) * 2;
1772 if (k_platform)
1773 size += 2;
f5155289 1774#ifdef DLINFO_ARCH_ITEMS
d97ef72e 1775 size += DLINFO_ARCH_ITEMS * 2;
ad6919dc
PM		 1776#endif
1777#ifdef ELF_HWCAP2
1778 size += 2;
f5155289 1779#endif
f516511e
PM		 1780 info->auxv_len = size * n;
1781
d97ef72e 1782 size += envc + argc + 2;
b9329d4b 1783 size += 1; /* argc itself */
d97ef72e 1784 size *= n;
7c4ee5bc
RH		 1785
1786 /* Allocate space and finalize stack alignment for entry now. */
1787 if (STACK_GROWS_DOWN) {
1788 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1789 sp = u_argc;
1790 } else {
1791 u_argc = sp;
1792 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1793 }
1794
1795 u_argv = u_argc + n;
1796 u_envp = u_argv + (argc + 1) * n;
1797 u_auxv = u_envp + (envc + 1) * n;
1798 info->saved_auxv = u_auxv;
1799 info->arg_start = u_argv;
1800 info->arg_end = u_argv + argc * n;
d97ef72e
RH		 1801
1802 /* This is correct because Linux defines
1803 * elf_addr_t as Elf32_Off / Elf64_Off
1804 */
1805#define NEW_AUX_ENT(id, val) do { \
7c4ee5bc
RH		 1806 put_user_ual(id, u_auxv); u_auxv += n; \
1807 put_user_ual(val, u_auxv); u_auxv += n; \
d97ef72e
RH		 1808 } while(0)
1809
82991bed
PM		 1810#ifdef ARCH_DLINFO
1811 /*
1812 * ARCH_DLINFO must come first so platform specific code can enforce
1813 * special alignment requirements on the AUXV if necessary (eg. PPC).
1814 */
1815 ARCH_DLINFO;
1816#endif
f516511e
PM		 1817 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1818 * on info->auxv_len will trigger.
1819 */
8e62a717 1820 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 1821 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1822 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
a70daba3 1823 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, getpagesize())));
8e62a717 1824 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 1825 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 1826 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 1827 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1828 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1829 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1830 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1831 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1832 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
14322bad 1833 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
444cd5c3 1834 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
14322bad 1835
ad6919dc
PM		 1836#ifdef ELF_HWCAP2
1837 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1838#endif
1839
7c4ee5bc 1840 if (u_platform) {
d97ef72e 1841 NEW_AUX_ENT(AT_PLATFORM, u_platform);
7c4ee5bc 1842 }
7c4ee5bc 1843 NEW_AUX_ENT (AT_NULL, 0);
f5155289
FB		 1844#undef NEW_AUX_ENT
1845
f516511e
PM		 1846 /* Check that our initial calculation of the auxv length matches how much
1847 * we actually put into it.
1848 */
1849 assert(info->auxv_len == u_auxv - info->saved_auxv);
7c4ee5bc
RH		 1850
1851 put_user_ual(argc, u_argc);
1852
1853 p = info->arg_strings;
1854 for (i = 0; i < argc; ++i) {
1855 put_user_ual(p, u_argv);
1856 u_argv += n;
1857 p += target_strlen(p) + 1;
1858 }
1859 put_user_ual(0, u_argv);
1860
1861 p = info->env_strings;
1862 for (i = 0; i < envc; ++i) {
1863 put_user_ual(p, u_envp);
1864 u_envp += n;
1865 p += target_strlen(p) + 1;
1866 }
1867 put_user_ual(0, u_envp);
edf8e2af 1868
d97ef72e 1869 return sp;
31e31b8a
FB		 1870}
1871
806d1021 1872#ifndef TARGET_HAS_VALIDATE_GUEST_SPACE
97cc7560 1873/* If the guest doesn't have a validation function just agree */
806d1021
MI		 1874static int validate_guest_space(unsigned long guest_base,
1875 unsigned long guest_size)
97cc7560
DDAG		 1876{
1877 return 1;
1878}
1879#endif
1880
dce10401
MI		 1881unsigned long init_guest_space(unsigned long host_start,
1882 unsigned long host_size,
1883 unsigned long guest_start,
1884 bool fixed)
1885{
1886 unsigned long current_start, real_start;
1887 int flags;
1888
1889 assert(host_start || host_size);
1890
1891 /* If just a starting address is given, then just verify that
1892 * address. */
1893 if (host_start && !host_size) {
806d1021 1894 if (validate_guest_space(host_start, host_size) == 1) {
dce10401
MI		 1895 return host_start;
1896 } else {
1897 return (unsigned long)-1;
1898 }
1899 }
1900
1901 /* Setup the initial flags and start address. */
1902 current_start = host_start & qemu_host_page_mask;
1903 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
1904 if (fixed) {
1905 flags |= MAP_FIXED;
1906 }
1907
1908 /* Otherwise, a non-zero size region of memory needs to be mapped
1909 * and validated. */
1910 while (1) {
806d1021
MI		 1911 unsigned long real_size = host_size;
1912
dce10401
MI		 1913 /* Do not use mmap_find_vma here because that is limited to the
1914 * guest address space. We are going to make the
1915 * guest address space fit whatever we're given.
1916 */
1917 real_start = (unsigned long)
1918 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
1919 if (real_start == (unsigned long)-1) {
1920 return (unsigned long)-1;
1921 }
1922
806d1021
MI		 1923 /* Ensure the address is properly aligned. */
1924 if (real_start & ~qemu_host_page_mask) {
1925 munmap((void *)real_start, host_size);
1926 real_size = host_size + qemu_host_page_size;
1927 real_start = (unsigned long)
1928 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
1929 if (real_start == (unsigned long)-1) {
1930 return (unsigned long)-1;
1931 }
1932 real_start = HOST_PAGE_ALIGN(real_start);
1933 }
1934
1935 /* Check to see if the address is valid. */
1936 if (!host_start || real_start == current_start) {
1937 int valid = validate_guest_space(real_start - guest_start,
1938 real_size);
1939 if (valid == 1) {
1940 break;
1941 } else if (valid == -1) {
1942 return (unsigned long)-1;
1943 }
1944 /* valid == 0, so try again. */
dce10401
MI		 1945 }
1946
1947 /* That address didn't work. Unmap and try a different one.
1948 * The address the host picked because is typically right at
1949 * the top of the host address space and leaves the guest with
1950 * no usable address space. Resort to a linear search. We
1951 * already compensated for mmap_min_addr, so this should not
1952 * happen often. Probably means we got unlucky and host
1953 * address space randomization put a shared library somewhere
1954 * inconvenient.
1955 */
1956 munmap((void *)real_start, host_size);
1957 current_start += qemu_host_page_size;
1958 if (host_start == current_start) {
1959 /* Theoretically possible if host doesn't have any suitably
1960 * aligned areas. Normally the first mmap will fail.
1961 */
1962 return (unsigned long)-1;
1963 }
1964 }
1965
13829020 1966 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
806d1021 1967
dce10401
MI		 1968 return real_start;
1969}
1970
f3ed1f5d
PM		 1971static void probe_guest_base(const char *image_name,
1972 abi_ulong loaddr, abi_ulong hiaddr)
1973{
1974 /* Probe for a suitable guest base address, if the user has not set
1975 * it explicitly, and set guest_base appropriately.
1976 * In case of error we will print a suitable message and exit.
1977 */
f3ed1f5d
PM		 1978 const char *errmsg;
1979 if (!have_guest_base && !reserved_va) {
1980 unsigned long host_start, real_start, host_size;
1981
1982 /* Round addresses to page boundaries. */
1983 loaddr &= qemu_host_page_mask;
1984 hiaddr = HOST_PAGE_ALIGN(hiaddr);
1985
1986 if (loaddr < mmap_min_addr) {
1987 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
1988 } else {
1989 host_start = loaddr;
1990 if (host_start != loaddr) {
1991 errmsg = "Address overflow loading ELF binary";
1992 goto exit_errmsg;
1993 }
1994 }
1995 host_size = hiaddr - loaddr;
dce10401
MI		 1996
1997 /* Setup the initial guest memory space with ranges gleaned from
1998 * the ELF image that is being loaded.
1999 */
2000 real_start = init_guest_space(host_start, host_size, loaddr, false);
2001 if (real_start == (unsigned long)-1) {
2002 errmsg = "Unable to find space for application";
2003 goto exit_errmsg;
f3ed1f5d 2004 }
dce10401
MI		 2005 guest_base = real_start - loaddr;
2006
13829020
PB		 2007 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
2008 TARGET_ABI_FMT_lx " to 0x%lx\n",
2009 loaddr, real_start);
f3ed1f5d
PM		 2010 }
2011 return;
2012
f3ed1f5d
PM		 2013exit_errmsg:
2014 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2015 exit(-1);
f3ed1f5d
PM		 2016}
2017
2018
8e62a717 2019/* Load an ELF image into the address space.
31e31b8a 2020
8e62a717
RH		 2021 IMAGE_NAME is the filename of the image, to use in error messages.
2022 IMAGE_FD is the open file descriptor for the image.
2023
2024 BPRM_BUF is a copy of the beginning of the file; this of course
2025 contains the elf file header at offset 0. It is assumed that this
2026 buffer is sufficiently aligned to present no problems to the host
2027 in accessing data at aligned offsets within the buffer.
2028
2029 On return: INFO values will be filled in, as necessary or available. */
2030
2031static void load_elf_image(const char *image_name, int image_fd,
bf858897 2032 struct image_info *info, char **pinterp_name,
8e62a717 2033 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 2034{
8e62a717
RH		 2035 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2036 struct elf_phdr *phdr;
2037 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2038 int i, retval;
2039 const char *errmsg;
5fafdf24 2040
8e62a717
RH		 2041 /* First of all, some simple consistency checks */
2042 errmsg = "Invalid ELF image for this architecture";
2043 if (!elf_check_ident(ehdr)) {
2044 goto exit_errmsg;
2045 }
2046 bswap_ehdr(ehdr);
2047 if (!elf_check_ehdr(ehdr)) {
2048 goto exit_errmsg;
d97ef72e 2049 }
5fafdf24 2050
8e62a717
RH		 2051 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2052 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2053 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 2054 } else {
8e62a717
RH		 2055 phdr = (struct elf_phdr *) alloca(i);
2056 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 2057 if (retval != i) {
8e62a717 2058 goto exit_read;
9955ffac 2059 }
d97ef72e 2060 }
8e62a717 2061 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 2062
1af02e83
MF		 2063#ifdef CONFIG_USE_FDPIC
2064 info->nsegs = 0;
2065 info->pt_dynamic_addr = 0;
2066#endif
2067
98c1076c
AB		 2068 mmap_lock();
2069
682674b8
RH		 2070 /* Find the maximum size of the image and allocate an appropriate
2071 amount of memory to handle that. */
2072 loaddr = -1, hiaddr = 0;
8e62a717
RH		 2073 for (i = 0; i < ehdr->e_phnum; ++i) {
2074 if (phdr[i].p_type == PT_LOAD) {
a93934fe 2075 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
682674b8
RH		 2076 if (a < loaddr) {
2077 loaddr = a;
2078 }
ccf661f8 2079 a = phdr[i].p_vaddr + phdr[i].p_memsz;
682674b8
RH		 2080 if (a > hiaddr) {
2081 hiaddr = a;
2082 }
1af02e83
MF		 2083#ifdef CONFIG_USE_FDPIC
2084 ++info->nsegs;
2085#endif
682674b8
RH		 2086 }
2087 }
2088
2089 load_addr = loaddr;
8e62a717 2090 if (ehdr->e_type == ET_DYN) {
682674b8
RH		 2091 /* The image indicates that it can be loaded anywhere. Find a
2092 location that can hold the memory space required. If the
2093 image is pre-linked, LOADDR will be non-zero. Since we do
2094 not supply MAP_FIXED here we'll use that address if and
2095 only if it remains available. */
2096 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2097 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2098 -1, 0);
2099 if (load_addr == -1) {
8e62a717 2100 goto exit_perror;
d97ef72e 2101 }
bf858897
RH		 2102 } else if (pinterp_name != NULL) {
2103 /* This is the main executable. Make sure that the low
2104 address does not conflict with MMAP_MIN_ADDR or the
2105 QEMU application itself. */
f3ed1f5d 2106 probe_guest_base(image_name, loaddr, hiaddr);
d97ef72e 2107 }
682674b8 2108 load_bias = load_addr - loaddr;
d97ef72e 2109
1af02e83
MF		 2110#ifdef CONFIG_USE_FDPIC
2111 {
2112 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
7267c094 2113 g_malloc(sizeof(*loadsegs) * info->nsegs);
1af02e83
MF		 2114
2115 for (i = 0; i < ehdr->e_phnum; ++i) {
2116 switch (phdr[i].p_type) {
2117 case PT_DYNAMIC:
2118 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2119 break;
2120 case PT_LOAD:
2121 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2122 loadsegs->p_vaddr = phdr[i].p_vaddr;
2123 loadsegs->p_memsz = phdr[i].p_memsz;
2124 ++loadsegs;
2125 break;
2126 }
2127 }
2128 }
2129#endif
2130
8e62a717
RH		 2131 info->load_bias = load_bias;
2132 info->load_addr = load_addr;
2133 info->entry = ehdr->e_entry + load_bias;
2134 info->start_code = -1;
2135 info->end_code = 0;
2136 info->start_data = -1;
2137 info->end_data = 0;
2138 info->brk = 0;
d8fd2954 2139 info->elf_flags = ehdr->e_flags;
8e62a717
RH		 2140
2141 for (i = 0; i < ehdr->e_phnum; i++) {
2142 struct elf_phdr *eppnt = phdr + i;
d97ef72e 2143 if (eppnt->p_type == PT_LOAD) {
682674b8 2144 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
d97ef72e 2145 int elf_prot = 0;
d97ef72e
RH		 2146
2147 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2148 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2149 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
d97ef72e 2150
682674b8
RH		 2151 vaddr = load_bias + eppnt->p_vaddr;
2152 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2153 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
2154
2155 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
2156 elf_prot, MAP_PRIVATE | MAP_FIXED,
8e62a717 2157 image_fd, eppnt->p_offset - vaddr_po);
09bfb054 2158 if (error == -1) {
8e62a717 2159 goto exit_perror;
09bfb054 2160 }
09bfb054 2161
682674b8
RH		 2162 vaddr_ef = vaddr + eppnt->p_filesz;
2163 vaddr_em = vaddr + eppnt->p_memsz;
31e31b8a 2164
cf129f3a 2165 /* If the load segment requests extra zeros (e.g. bss), map it. */
682674b8
RH		 2166 if (vaddr_ef < vaddr_em) {
2167 zero_bss(vaddr_ef, vaddr_em, elf_prot);
cf129f3a 2168 }
8e62a717
RH		 2169
2170 /* Find the full program boundaries. */
2171 if (elf_prot & PROT_EXEC) {
2172 if (vaddr < info->start_code) {
2173 info->start_code = vaddr;
2174 }
2175 if (vaddr_ef > info->end_code) {
2176 info->end_code = vaddr_ef;
2177 }
2178 }
2179 if (elf_prot & PROT_WRITE) {
2180 if (vaddr < info->start_data) {
2181 info->start_data = vaddr;
2182 }
2183 if (vaddr_ef > info->end_data) {
2184 info->end_data = vaddr_ef;
2185 }
2186 if (vaddr_em > info->brk) {
2187 info->brk = vaddr_em;
2188 }
2189 }
bf858897
RH		 2190 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2191 char *interp_name;
2192
2193 if (*pinterp_name) {
2194 errmsg = "Multiple PT_INTERP entries";
2195 goto exit_errmsg;
2196 }
2197 interp_name = malloc(eppnt->p_filesz);
2198 if (!interp_name) {
2199 goto exit_perror;
2200 }
2201
2202 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2203 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2204 eppnt->p_filesz);
2205 } else {
2206 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2207 eppnt->p_offset);
2208 if (retval != eppnt->p_filesz) {
2209 goto exit_perror;
2210 }
2211 }
2212 if (interp_name[eppnt->p_filesz - 1] != 0) {
2213 errmsg = "Invalid PT_INTERP entry";
2214 goto exit_errmsg;
2215 }
2216 *pinterp_name = interp_name;
d97ef72e 2217 }
682674b8 2218 }
5fafdf24 2219
8e62a717
RH		 2220 if (info->end_data == 0) {
2221 info->start_data = info->end_code;
2222 info->end_data = info->end_code;
2223 info->brk = info->end_code;
2224 }
2225
682674b8 2226 if (qemu_log_enabled()) {
8e62a717 2227 load_symbols(ehdr, image_fd, load_bias);
682674b8 2228 }
31e31b8a 2229
98c1076c
AB		 2230 mmap_unlock();
2231
8e62a717
RH		 2232 close(image_fd);
2233 return;
2234
2235 exit_read:
2236 if (retval >= 0) {
2237 errmsg = "Incomplete read of file header";
2238 goto exit_errmsg;
2239 }
2240 exit_perror:
2241 errmsg = strerror(errno);
2242 exit_errmsg:
2243 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2244 exit(-1);
2245}
2246
2247static void load_elf_interp(const char *filename, struct image_info *info,
2248 char bprm_buf[BPRM_BUF_SIZE])
2249{
2250 int fd, retval;
2251
2252 fd = open(path(filename), O_RDONLY);
2253 if (fd < 0) {
2254 goto exit_perror;
2255 }
31e31b8a 2256
8e62a717
RH		 2257 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2258 if (retval < 0) {
2259 goto exit_perror;
2260 }
2261 if (retval < BPRM_BUF_SIZE) {
2262 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2263 }
2264
bf858897 2265 load_elf_image(filename, fd, info, NULL, bprm_buf);
8e62a717
RH		 2266 return;
2267
2268 exit_perror:
2269 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2270 exit(-1);
31e31b8a
FB		 2271}
2272
49918a75
PB		 2273static int symfind(const void *s0, const void *s1)
2274{
c7c530cd 2275 target_ulong addr = *(target_ulong *)s0;
49918a75
PB		 2276 struct elf_sym *sym = (struct elf_sym *)s1;
2277 int result = 0;
c7c530cd 2278 if (addr < sym->st_value) {
49918a75 2279 result = -1;
c7c530cd 2280 } else if (addr >= sym->st_value + sym->st_size) {
49918a75
PB		 2281 result = 1;
2282 }
2283 return result;
2284}
2285
2286static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2287{
2288#if ELF_CLASS == ELFCLASS32
2289 struct elf_sym *syms = s->disas_symtab.elf32;
2290#else
2291 struct elf_sym *syms = s->disas_symtab.elf64;
2292#endif
2293
2294 // binary search
49918a75
PB		 2295 struct elf_sym *sym;
2296
c7c530cd 2297 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 2298 if (sym != NULL) {
49918a75
PB		 2299 return s->disas_strtab + sym->st_name;
2300 }
2301
2302 return "";
2303}
2304
2305/* FIXME: This should use elf_ops.h */
2306static int symcmp(const void *s0, const void *s1)
2307{
2308 struct elf_sym *sym0 = (struct elf_sym *)s0;
2309 struct elf_sym *sym1 = (struct elf_sym *)s1;
2310 return (sym0->st_value < sym1->st_value)
2311 ? -1
2312 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2313}
2314
689f936f 2315/* Best attempt to load symbols from this ELF object. */
682674b8 2316static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 2317{
682674b8 2318 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
1e06262d 2319 uint64_t segsz;
682674b8 2320 struct elf_shdr *shdr;
b9475279
CV		 2321 char *strings = NULL;
2322 struct syminfo *s = NULL;
2323 struct elf_sym *new_syms, *syms = NULL;
689f936f 2324
682674b8
RH		 2325 shnum = hdr->e_shnum;
2326 i = shnum * sizeof(struct elf_shdr);
2327 shdr = (struct elf_shdr *)alloca(i);
2328 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2329 return;
2330 }
2331
2332 bswap_shdr(shdr, shnum);
2333 for (i = 0; i < shnum; ++i) {
2334 if (shdr[i].sh_type == SHT_SYMTAB) {
2335 sym_idx = i;
2336 str_idx = shdr[i].sh_link;
49918a75
PB		 2337 goto found;
2338 }
689f936f 2339 }
682674b8
RH		 2340
2341 /* There will be no symbol table if the file was stripped. */
2342 return;
689f936f
FB		 2343
2344 found:
682674b8 2345 /* Now know where the strtab and symtab are. Snarf them. */
0ef9ea29 2346 s = g_try_new(struct syminfo, 1);
682674b8 2347 if (!s) {
b9475279 2348 goto give_up;
682674b8 2349 }
5fafdf24 2350
1e06262d
PM		 2351 segsz = shdr[str_idx].sh_size;
2352 s->disas_strtab = strings = g_try_malloc(segsz);
2353 if (!strings ||
2354 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
b9475279 2355 goto give_up;
682674b8 2356 }
49918a75 2357
1e06262d
PM		 2358 segsz = shdr[sym_idx].sh_size;
2359 syms = g_try_malloc(segsz);
2360 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
b9475279 2361 goto give_up;
682674b8 2362 }
31e31b8a 2363
1e06262d
PM		 2364 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2365 /* Implausibly large symbol table: give up rather than ploughing
2366 * on with the number of symbols calculation overflowing
2367 */
2368 goto give_up;
2369 }
2370 nsyms = segsz / sizeof(struct elf_sym);
682674b8 2371 for (i = 0; i < nsyms; ) {
49918a75 2372 bswap_sym(syms + i);
682674b8
RH		 2373 /* Throw away entries which we do not need. */
2374 if (syms[i].st_shndx == SHN_UNDEF
2375 || syms[i].st_shndx >= SHN_LORESERVE
2376 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2377 if (i < --nsyms) {
49918a75
PB		 2378 syms[i] = syms[nsyms];
2379 }
682674b8 2380 } else {
49918a75 2381#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 2382 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2383 syms[i].st_value &= ~(target_ulong)1;
0774bed1 2384#endif
682674b8
RH		 2385 syms[i].st_value += load_bias;
2386 i++;
2387 }
0774bed1 2388 }
49918a75 2389
b9475279
CV		 2390 /* No "useful" symbol. */
2391 if (nsyms == 0) {
2392 goto give_up;
2393 }
2394
5d5c9930
RH		 2395 /* Attempt to free the storage associated with the local symbols
2396 that we threw away. Whether or not this has any effect on the
2397 memory allocation depends on the malloc implementation and how
2398 many symbols we managed to discard. */
0ef9ea29 2399 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
8d79de6e 2400 if (new_syms == NULL) {
b9475279 2401 goto give_up;
5d5c9930 2402 }
8d79de6e 2403 syms = new_syms;
5d5c9930 2404
49918a75 2405 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 2406
49918a75
PB		 2407 s->disas_num_syms = nsyms;
2408#if ELF_CLASS == ELFCLASS32
2409 s->disas_symtab.elf32 = syms;
49918a75
PB		 2410#else
2411 s->disas_symtab.elf64 = syms;
49918a75 2412#endif
682674b8 2413 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 2414 s->next = syminfos;
2415 syminfos = s;
b9475279
CV		 2416
2417 return;
2418
2419give_up:
0ef9ea29
PM		 2420 g_free(s);
2421 g_free(strings);
2422 g_free(syms);
689f936f 2423}
31e31b8a 2424
768fe76e
YS		 2425uint32_t get_elf_eflags(int fd)
2426{
2427 struct elfhdr ehdr;
2428 off_t offset;
2429 int ret;
2430
2431 /* Read ELF header */
2432 offset = lseek(fd, 0, SEEK_SET);
2433 if (offset == (off_t) -1) {
2434 return 0;
2435 }
2436 ret = read(fd, &ehdr, sizeof(ehdr));
2437 if (ret < sizeof(ehdr)) {
2438 return 0;
2439 }
2440 offset = lseek(fd, offset, SEEK_SET);
2441 if (offset == (off_t) -1) {
2442 return 0;
2443 }
2444
2445 /* Check ELF signature */
2446 if (!elf_check_ident(&ehdr)) {
2447 return 0;
2448 }
2449
2450 /* check header */
2451 bswap_ehdr(&ehdr);
2452 if (!elf_check_ehdr(&ehdr)) {
2453 return 0;
2454 }
2455
2456 /* return architecture id */
2457 return ehdr.e_flags;
2458}
2459
f0116c54 2460int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
31e31b8a 2461{
8e62a717 2462 struct image_info interp_info;
31e31b8a 2463 struct elfhdr elf_ex;
8e62a717 2464 char *elf_interpreter = NULL;
59baae9a 2465 char *scratch;
31e31b8a 2466
bf858897 2467 info->start_mmap = (abi_ulong)ELF_START_MMAP;
bf858897
RH		 2468
2469 load_elf_image(bprm->filename, bprm->fd, info,
2470 &elf_interpreter, bprm->buf);
31e31b8a 2471
bf858897
RH		 2472 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2473 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2474 when we load the interpreter. */
2475 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 2476
59baae9a
SB		 2477 /* Do this so that we can load the interpreter, if need be. We will
2478 change some of these later */
2479 bprm->p = setup_arg_pages(bprm, info);
2480
2481 scratch = g_new0(char, TARGET_PAGE_SIZE);
7c4ee5bc
RH		 2482 if (STACK_GROWS_DOWN) {
2483 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2484 bprm->p, info->stack_limit);
2485 info->file_string = bprm->p;
2486 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2487 bprm->p, info->stack_limit);
2488 info->env_strings = bprm->p;
2489 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2490 bprm->p, info->stack_limit);
2491 info->arg_strings = bprm->p;
2492 } else {
2493 info->arg_strings = bprm->p;
2494 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2495 bprm->p, info->stack_limit);
2496 info->env_strings = bprm->p;
2497 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2498 bprm->p, info->stack_limit);
2499 info->file_string = bprm->p;
2500 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2501 bprm->p, info->stack_limit);
2502 }
2503
59baae9a
SB		 2504 g_free(scratch);
2505
e5fe0c52 2506 if (!bprm->p) {
bf858897
RH		 2507 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2508 exit(-1);
379f6698 2509 }
379f6698 2510
8e62a717
RH		 2511 if (elf_interpreter) {
2512 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 2513
8e62a717
RH		 2514 /* If the program interpreter is one of these two, then assume
2515 an iBCS2 image. Otherwise assume a native linux image. */
2516
2517 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2518 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2519 info->personality = PER_SVR4;
31e31b8a 2520
8e62a717
RH		 2521 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2522 and some applications "depend" upon this behavior. Since
2523 we do not have the power to recompile these, we emulate
2524 the SVr4 behavior. Sigh. */
2525 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
68754b44 2526 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
8e62a717 2527 }
31e31b8a
FB		 2528 }
2529
8e62a717
RH		 2530 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2531 info, (elf_interpreter ? &interp_info : NULL));
2532 info->start_stack = bprm->p;
2533
2534 /* If we have an interpreter, set that as the program's entry point.
8e78064e 2535 Copy the load_bias as well, to help PPC64 interpret the entry
8e62a717
RH		 2536 point as a function descriptor. Do this after creating elf tables
2537 so that we copy the original program entry point into the AUXV. */
2538 if (elf_interpreter) {
8e78064e 2539 info->load_bias = interp_info.load_bias;
8e62a717 2540 info->entry = interp_info.entry;
bf858897 2541 free(elf_interpreter);
8e62a717 2542 }
31e31b8a 2543
edf8e2af
MW		 2544#ifdef USE_ELF_CORE_DUMP
2545 bprm->core_dump = &elf_core_dump;
2546#endif
2547
31e31b8a
FB		 2548 return 0;
2549}
2550
edf8e2af 2551#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 2552/*
2553 * Definitions to generate Intel SVR4-like core files.
a2547a13 2554 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 2555 * tacked on the front to prevent clashes with linux definitions,
2556 * and the typedef forms have been avoided. This is mostly like
2557 * the SVR4 structure, but more Linuxy, with things that Linux does
2558 * not support and which gdb doesn't really use excluded.
2559 *
2560 * Fields we don't dump (their contents is zero) in linux-user qemu
2561 * are marked with XXX.
2562 *
2563 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2564 *
2565 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 2566 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 2567 * the target resides):
2568 *
2569 * #define USE_ELF_CORE_DUMP
2570 *
2571 * Next you define type of register set used for dumping. ELF specification
2572 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2573 *
c227f099 2574 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 2575 * #define ELF_NREG <number of registers>
c227f099 2576 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 2577 *
edf8e2af
MW		 2578 * Last step is to implement target specific function that copies registers
2579 * from given cpu into just specified register set. Prototype is:
2580 *
c227f099 2581 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
9349b4f9 2582 * const CPUArchState *env);
edf8e2af
MW		 2583 *
2584 * Parameters:
2585 * regs - copy register values into here (allocated and zeroed by caller)
2586 * env - copy registers from here
2587 *
2588 * Example for ARM target is provided in this file.
2589 */
2590
2591/* An ELF note in memory */
2592struct memelfnote {
2593 const char *name;
2594 size_t namesz;
2595 size_t namesz_rounded;
2596 int type;
2597 size_t datasz;
80f5ce75 2598 size_t datasz_rounded;
edf8e2af
MW		 2599 void *data;
2600 size_t notesz;
2601};
2602
a2547a13 2603struct target_elf_siginfo {
f8fd4fc4
PB		 2604 abi_int si_signo; /* signal number */
2605 abi_int si_code; /* extra code */
2606 abi_int si_errno; /* errno */
edf8e2af
MW		 2607};
2608
a2547a13
LD		 2609struct target_elf_prstatus {
2610 struct target_elf_siginfo pr_info; /* Info associated with signal */
1ddd592f 2611 abi_short pr_cursig; /* Current signal */
ca98ac83
PB		 2612 abi_ulong pr_sigpend; /* XXX */
2613 abi_ulong pr_sighold; /* XXX */
c227f099
AL		 2614 target_pid_t pr_pid;
2615 target_pid_t pr_ppid;
2616 target_pid_t pr_pgrp;
2617 target_pid_t pr_sid;
edf8e2af
MW		 2618 struct target_timeval pr_utime; /* XXX User time */
2619 struct target_timeval pr_stime; /* XXX System time */
2620 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2621 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 2622 target_elf_gregset_t pr_reg; /* GP registers */
f8fd4fc4 2623 abi_int pr_fpvalid; /* XXX */
edf8e2af
MW		 2624};
2625
2626#define ELF_PRARGSZ (80) /* Number of chars for args */
2627
a2547a13 2628struct target_elf_prpsinfo {
edf8e2af
MW		 2629 char pr_state; /* numeric process state */
2630 char pr_sname; /* char for pr_state */
2631 char pr_zomb; /* zombie */
2632 char pr_nice; /* nice val */
ca98ac83 2633 abi_ulong pr_flag; /* flags */
c227f099
AL		 2634 target_uid_t pr_uid;
2635 target_gid_t pr_gid;
2636 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af
MW		 2637 /* Lots missing */
2638 char pr_fname[16]; /* filename of executable */
2639 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2640};
2641
2642/* Here is the structure in which status of each thread is captured. */
2643struct elf_thread_status {
72cf2d4f 2644 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 2645 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 2646#if 0
2647 elf_fpregset_t fpu; /* NT_PRFPREG */
2648 struct task_struct *thread;
2649 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2650#endif
2651 struct memelfnote notes[1];
2652 int num_notes;
2653};
2654
2655struct elf_note_info {
2656 struct memelfnote *notes;
a2547a13
LD		 2657 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2658 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 2659
72cf2d4f 2660 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
edf8e2af
MW		 2661#if 0
2662 /*
2663 * Current version of ELF coredump doesn't support
2664 * dumping fp regs etc.
2665 */
2666 elf_fpregset_t *fpu;
2667 elf_fpxregset_t *xfpu;
2668 int thread_status_size;
2669#endif
2670 int notes_size;
2671 int numnote;
2672};
2673
2674struct vm_area_struct {
1a1c4db9
MI		 2675 target_ulong vma_start; /* start vaddr of memory region */
2676 target_ulong vma_end; /* end vaddr of memory region */
2677 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 2678 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 2679};
2680
2681struct mm_struct {
72cf2d4f 2682 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 2683 int mm_count; /* number of mappings */
2684};
2685
2686static struct mm_struct *vma_init(void);
2687static void vma_delete(struct mm_struct *);
1a1c4db9
MI		 2688static int vma_add_mapping(struct mm_struct *, target_ulong,
2689 target_ulong, abi_ulong);
edf8e2af
MW		 2690static int vma_get_mapping_count(const struct mm_struct *);
2691static struct vm_area_struct *vma_first(const struct mm_struct *);
2692static struct vm_area_struct *vma_next(struct vm_area_struct *);
2693static abi_ulong vma_dump_size(const struct vm_area_struct *);
1a1c4db9 2694static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 2695 unsigned long flags);
edf8e2af
MW		 2696
2697static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2698static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 2699 unsigned int, void *);
a2547a13
LD		 2700static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2701static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 2702static void fill_auxv_note(struct memelfnote *, const TaskState *);
2703static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2704static size_t note_size(const struct memelfnote *);
2705static void free_note_info(struct elf_note_info *);
9349b4f9
AF		 2706static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2707static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
edf8e2af
MW		 2708static int core_dump_filename(const TaskState *, char *, size_t);
2709
2710static int dump_write(int, const void *, size_t);
2711static int write_note(struct memelfnote *, int);
2712static int write_note_info(struct elf_note_info *, int);
2713
2714#ifdef BSWAP_NEEDED
a2547a13 2715static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af 2716{
ca98ac83
PB		 2717 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2718 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2719 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
edf8e2af 2720 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
ca98ac83
PB		 2721 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2722 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
edf8e2af
MW		 2723 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2724 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2725 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2726 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2727 /* cpu times are not filled, so we skip them */
2728 /* regs should be in correct format already */
2729 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2730}
2731
a2547a13 2732static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af 2733{
ca98ac83 2734 psinfo->pr_flag = tswapal(psinfo->pr_flag);
edf8e2af
MW		 2735 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2736 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2737 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2738 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2739 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2740 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2741}
991f8f0c
RH		 2742
2743static void bswap_note(struct elf_note *en)
2744{
2745 bswap32s(&en->n_namesz);
2746 bswap32s(&en->n_descsz);
2747 bswap32s(&en->n_type);
2748}
2749#else
2750static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2751static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2752static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 2753#endif /* BSWAP_NEEDED */
2754
2755/*
2756 * Minimal support for linux memory regions. These are needed
2757 * when we are finding out what memory exactly belongs to
2758 * emulated process. No locks needed here, as long as
2759 * thread that received the signal is stopped.
2760 */
2761
2762static struct mm_struct *vma_init(void)
2763{
2764 struct mm_struct *mm;
2765
7267c094 2766 if ((mm = g_malloc(sizeof (*mm))) == NULL)
edf8e2af
MW		 2767 return (NULL);
2768
2769 mm->mm_count = 0;
72cf2d4f 2770 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 2771
2772 return (mm);
2773}
2774
2775static void vma_delete(struct mm_struct *mm)
2776{
2777 struct vm_area_struct *vma;
2778
2779 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 2780 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
7267c094 2781 g_free(vma);
edf8e2af 2782 }
7267c094 2783 g_free(mm);
edf8e2af
MW		 2784}
2785
1a1c4db9
MI		 2786static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
2787 target_ulong end, abi_ulong flags)
edf8e2af
MW		 2788{
2789 struct vm_area_struct *vma;
2790
7267c094 2791 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
edf8e2af
MW		 2792 return (-1);
2793
2794 vma->vma_start = start;
2795 vma->vma_end = end;
2796 vma->vma_flags = flags;
2797
72cf2d4f 2798 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 2799 mm->mm_count++;
2800
2801 return (0);
2802}
2803
2804static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2805{
72cf2d4f 2806 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 2807}
2808
2809static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2810{
72cf2d4f 2811 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 2812}
2813
2814static int vma_get_mapping_count(const struct mm_struct *mm)
2815{
2816 return (mm->mm_count);
2817}
2818
2819/*
2820 * Calculate file (dump) size of given memory region.
2821 */
2822static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2823{
2824 /* if we cannot even read the first page, skip it */
2825 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2826 return (0);
2827
2828 /*
2829 * Usually we don't dump executable pages as they contain
2830 * non-writable code that debugger can read directly from
2831 * target library etc. However, thread stacks are marked
2832 * also executable so we read in first page of given region
2833 * and check whether it contains elf header. If there is
2834 * no elf header, we dump it.
2835 */
2836 if (vma->vma_flags & PROT_EXEC) {
2837 char page[TARGET_PAGE_SIZE];
2838
2839 copy_from_user(page, vma->vma_start, sizeof (page));
2840 if ((page[EI_MAG0] == ELFMAG0) &&
2841 (page[EI_MAG1] == ELFMAG1) &&
2842 (page[EI_MAG2] == ELFMAG2) &&
2843 (page[EI_MAG3] == ELFMAG3)) {
2844 /*
2845 * Mappings are possibly from ELF binary. Don't dump
2846 * them.
2847 */
2848 return (0);
2849 }
2850 }
2851
2852 return (vma->vma_end - vma->vma_start);
2853}
2854
1a1c4db9 2855static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 2856 unsigned long flags)
edf8e2af
MW		 2857{
2858 struct mm_struct *mm = (struct mm_struct *)priv;
2859
edf8e2af
MW		 2860 vma_add_mapping(mm, start, end, flags);
2861 return (0);
2862}
2863
2864static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 2865 unsigned int sz, void *data)
edf8e2af
MW		 2866{
2867 unsigned int namesz;
2868
2869 namesz = strlen(name) + 1;
2870 note->name = name;
2871 note->namesz = namesz;
2872 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2873 note->type = type;
80f5ce75
LV		 2874 note->datasz = sz;
2875 note->datasz_rounded = roundup(sz, sizeof (int32_t));
2876
edf8e2af
MW		 2877 note->data = data;
2878
2879 /*
2880 * We calculate rounded up note size here as specified by
2881 * ELF document.
2882 */
2883 note->notesz = sizeof (struct elf_note) +
80f5ce75 2884 note->namesz_rounded + note->datasz_rounded;
edf8e2af
MW		 2885}
2886
2887static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 2888 uint32_t flags)
edf8e2af
MW		 2889{
2890 (void) memset(elf, 0, sizeof(*elf));
2891
2892 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2893 elf->e_ident[EI_CLASS] = ELF_CLASS;
2894 elf->e_ident[EI_DATA] = ELF_DATA;
2895 elf->e_ident[EI_VERSION] = EV_CURRENT;
2896 elf->e_ident[EI_OSABI] = ELF_OSABI;
2897
2898 elf->e_type = ET_CORE;
2899 elf->e_machine = machine;
2900 elf->e_version = EV_CURRENT;
2901 elf->e_phoff = sizeof(struct elfhdr);
2902 elf->e_flags = flags;
2903 elf->e_ehsize = sizeof(struct elfhdr);
2904 elf->e_phentsize = sizeof(struct elf_phdr);
2905 elf->e_phnum = segs;
2906
edf8e2af 2907 bswap_ehdr(elf);
edf8e2af
MW		 2908}
2909
2910static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
2911{
2912 phdr->p_type = PT_NOTE;
2913 phdr->p_offset = offset;
2914 phdr->p_vaddr = 0;
2915 phdr->p_paddr = 0;
2916 phdr->p_filesz = sz;
2917 phdr->p_memsz = 0;
2918 phdr->p_flags = 0;
2919 phdr->p_align = 0;
2920
991f8f0c 2921 bswap_phdr(phdr, 1);
edf8e2af
MW		 2922}
2923
2924static size_t note_size(const struct memelfnote *note)
2925{
2926 return (note->notesz);
2927}
2928
a2547a13 2929static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 2930 const TaskState *ts, int signr)
edf8e2af
MW		 2931{
2932 (void) memset(prstatus, 0, sizeof (*prstatus));
2933 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
2934 prstatus->pr_pid = ts->ts_tid;
2935 prstatus->pr_ppid = getppid();
2936 prstatus->pr_pgrp = getpgrp();
2937 prstatus->pr_sid = getsid(0);
2938
edf8e2af 2939 bswap_prstatus(prstatus);
edf8e2af
MW		 2940}
2941
a2547a13 2942static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af 2943{
900cfbca 2944 char *base_filename;
edf8e2af
MW		 2945 unsigned int i, len;
2946
2947 (void) memset(psinfo, 0, sizeof (*psinfo));
2948
2949 len = ts->info->arg_end - ts->info->arg_start;
2950 if (len >= ELF_PRARGSZ)
2951 len = ELF_PRARGSZ - 1;
2952 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
2953 return -EFAULT;
2954 for (i = 0; i < len; i++)
2955 if (psinfo->pr_psargs[i] == 0)
2956 psinfo->pr_psargs[i] = ' ';
2957 psinfo->pr_psargs[len] = 0;
2958
2959 psinfo->pr_pid = getpid();
2960 psinfo->pr_ppid = getppid();
2961 psinfo->pr_pgrp = getpgrp();
2962 psinfo->pr_sid = getsid(0);
2963 psinfo->pr_uid = getuid();
2964 psinfo->pr_gid = getgid();
2965
900cfbca
JM		 2966 base_filename = g_path_get_basename(ts->bprm->filename);
2967 /*
2968 * Using strncpy here is fine: at max-length,
2969 * this field is not NUL-terminated.
2970 */
edf8e2af 2971 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 2972 sizeof(psinfo->pr_fname));
edf8e2af 2973
900cfbca 2974 g_free(base_filename);
edf8e2af 2975 bswap_psinfo(psinfo);
edf8e2af
MW		 2976 return (0);
2977}
2978
2979static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
2980{
2981 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
2982 elf_addr_t orig_auxv = auxv;
edf8e2af 2983 void *ptr;
125b0f55 2984 int len = ts->info->auxv_len;
edf8e2af
MW		 2985
2986 /*
2987 * Auxiliary vector is stored in target process stack. It contains
2988 * {type, value} pairs that we need to dump into note. This is not
2989 * strictly necessary but we do it here for sake of completeness.
2990 */
2991
edf8e2af
MW		 2992 /* read in whole auxv vector and copy it to memelfnote */
2993 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
2994 if (ptr != NULL) {
2995 fill_note(note, "CORE", NT_AUXV, len, ptr);
2996 unlock_user(ptr, auxv, len);
2997 }
2998}
2999
3000/*
3001 * Constructs name of coredump file. We have following convention
3002 * for the name:
3003 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3004 *
3005 * Returns 0 in case of success, -1 otherwise (errno is set).
3006 */
3007static int core_dump_filename(const TaskState *ts, char *buf,
d97ef72e 3008 size_t bufsize)
edf8e2af
MW		 3009{
3010 char timestamp[64];
edf8e2af
MW		 3011 char *base_filename = NULL;
3012 struct timeval tv;
3013 struct tm tm;
3014
3015 assert(bufsize >= PATH_MAX);
3016
3017 if (gettimeofday(&tv, NULL) < 0) {
3018 (void) fprintf(stderr, "unable to get current timestamp: %s",
d97ef72e 3019 strerror(errno));
edf8e2af
MW		 3020 return (-1);
3021 }
3022
b8da57fa 3023 base_filename = g_path_get_basename(ts->bprm->filename);
edf8e2af 3024 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
d97ef72e 3025 localtime_r(&tv.tv_sec, &tm));
edf8e2af 3026 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
d97ef72e 3027 base_filename, timestamp, (int)getpid());
b8da57fa 3028 g_free(base_filename);
edf8e2af
MW		 3029
3030 return (0);
3031}
3032
3033static int dump_write(int fd, const void *ptr, size_t size)
3034{
3035 const char *bufp = (const char *)ptr;
3036 ssize_t bytes_written, bytes_left;
3037 struct rlimit dumpsize;
3038 off_t pos;
3039
3040 bytes_written = 0;
3041 getrlimit(RLIMIT_CORE, &dumpsize);
3042 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3043 if (errno == ESPIPE) { /* not a seekable stream */
3044 bytes_left = size;
3045 } else {
3046 return pos;
3047 }
3048 } else {
3049 if (dumpsize.rlim_cur <= pos) {
3050 return -1;
3051 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3052 bytes_left = size;
3053 } else {
3054 size_t limit_left=dumpsize.rlim_cur - pos;
3055 bytes_left = limit_left >= size ? size : limit_left ;
3056 }
3057 }
3058
3059 /*
3060 * In normal conditions, single write(2) should do but
3061 * in case of socket etc. this mechanism is more portable.
3062 */
3063 do {
3064 bytes_written = write(fd, bufp, bytes_left);
3065 if (bytes_written < 0) {
3066 if (errno == EINTR)
3067 continue;
3068 return (-1);
3069 } else if (bytes_written == 0) { /* eof */
3070 return (-1);
3071 }
3072 bufp += bytes_written;
3073 bytes_left -= bytes_written;
3074 } while (bytes_left > 0);
3075
3076 return (0);
3077}
3078
3079static int write_note(struct memelfnote *men, int fd)
3080{
3081 struct elf_note en;
3082
3083 en.n_namesz = men->namesz;
3084 en.n_type = men->type;
3085 en.n_descsz = men->datasz;
3086
edf8e2af 3087 bswap_note(&en);
edf8e2af
MW		 3088
3089 if (dump_write(fd, &en, sizeof(en)) != 0)
3090 return (-1);
3091 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3092 return (-1);
80f5ce75 3093 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
edf8e2af
MW		 3094 return (-1);
3095
3096 return (0);
3097}
3098
9349b4f9 3099static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
edf8e2af 3100{
0429a971
AF		 3101 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3102 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3103 struct elf_thread_status *ets;
3104
7267c094 3105 ets = g_malloc0(sizeof (*ets));
edf8e2af
MW		 3106 ets->num_notes = 1; /* only prstatus is dumped */
3107 fill_prstatus(&ets->prstatus, ts, 0);
3108 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3109 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 3110 &ets->prstatus);
edf8e2af 3111
72cf2d4f 3112 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 3113
3114 info->notes_size += note_size(&ets->notes[0]);
3115}
3116
6afafa86
PM		 3117static void init_note_info(struct elf_note_info *info)
3118{
3119 /* Initialize the elf_note_info structure so that it is at
3120 * least safe to call free_note_info() on it. Must be
3121 * called before calling fill_note_info().
3122 */
3123 memset(info, 0, sizeof (*info));
3124 QTAILQ_INIT(&info->thread_list);
3125}
3126
edf8e2af 3127static int fill_note_info(struct elf_note_info *info,
9349b4f9 3128 long signr, const CPUArchState *env)
edf8e2af
MW		 3129{
3130#define NUMNOTES 3
0429a971
AF		 3131 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3132 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3133 int i;
3134
c78d65e8 3135 info->notes = g_new0(struct memelfnote, NUMNOTES);
edf8e2af
MW		 3136 if (info->notes == NULL)
3137 return (-ENOMEM);
7267c094 3138 info->prstatus = g_malloc0(sizeof (*info->prstatus));
edf8e2af
MW		 3139 if (info->prstatus == NULL)
3140 return (-ENOMEM);
7267c094 3141 info->psinfo = g_malloc0(sizeof (*info->psinfo));
edf8e2af
MW		 3142 if (info->prstatus == NULL)
3143 return (-ENOMEM);
3144
3145 /*
3146 * First fill in status (and registers) of current thread
3147 * including process info & aux vector.
3148 */
3149 fill_prstatus(info->prstatus, ts, signr);
3150 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3151 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 3152 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 3153 fill_psinfo(info->psinfo, ts);
3154 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 3155 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 3156 fill_auxv_note(&info->notes[2], ts);
3157 info->numnote = 3;
3158
3159 info->notes_size = 0;
3160 for (i = 0; i < info->numnote; i++)
3161 info->notes_size += note_size(&info->notes[i]);
3162
3163 /* read and fill status of all threads */
3164 cpu_list_lock();
bdc44640 3165 CPU_FOREACH(cpu) {
a2247f8e 3166 if (cpu == thread_cpu) {
edf8e2af 3167 continue;
182735ef
AF		 3168 }
3169 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
edf8e2af
MW		 3170 }
3171 cpu_list_unlock();
3172
3173 return (0);
3174}
3175
3176static void free_note_info(struct elf_note_info *info)
3177{
3178 struct elf_thread_status *ets;
3179
72cf2d4f
BS		 3180 while (!QTAILQ_EMPTY(&info->thread_list)) {
3181 ets = QTAILQ_FIRST(&info->thread_list);
3182 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
7267c094 3183 g_free(ets);
edf8e2af
MW		 3184 }
3185
7267c094
AL		 3186 g_free(info->prstatus);
3187 g_free(info->psinfo);
3188 g_free(info->notes);
edf8e2af
MW		 3189}
3190
3191static int write_note_info(struct elf_note_info *info, int fd)
3192{
3193 struct elf_thread_status *ets;
3194 int i, error = 0;
3195
3196 /* write prstatus, psinfo and auxv for current thread */
3197 for (i = 0; i < info->numnote; i++)
3198 if ((error = write_note(&info->notes[i], fd)) != 0)
3199 return (error);
3200
3201 /* write prstatus for each thread */
52a53afe 3202 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
edf8e2af
MW		 3203 if ((error = write_note(&ets->notes[0], fd)) != 0)
3204 return (error);
3205 }
3206
3207 return (0);
3208}
3209
3210/*
3211 * Write out ELF coredump.
3212 *
3213 * See documentation of ELF object file format in:
3214 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3215 *
3216 * Coredump format in linux is following:
3217 *
3218 * 0 +----------------------+ \
3219 * | ELF header | ET_CORE |
3220 * +----------------------+ |
3221 * | ELF program headers | |--- headers
3222 * | - NOTE section | |
3223 * | - PT_LOAD sections | |
3224 * +----------------------+ /
3225 * | NOTEs: |
3226 * | - NT_PRSTATUS |
3227 * | - NT_PRSINFO |
3228 * | - NT_AUXV |
3229 * +----------------------+ <-- aligned to target page
3230 * | Process memory dump |
3231 * : :
3232 * . .
3233 * : :
3234 * | |
3235 * +----------------------+
3236 *
3237 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3238 * NT_PRSINFO -> struct elf_prpsinfo
3239 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3240 *
3241 * Format follows System V format as close as possible. Current
3242 * version limitations are as follows:
3243 * - no floating point registers are dumped
3244 *
3245 * Function returns 0 in case of success, negative errno otherwise.
3246 *
3247 * TODO: make this work also during runtime: it should be
3248 * possible to force coredump from running process and then
3249 * continue processing. For example qemu could set up SIGUSR2
3250 * handler (provided that target process haven't registered
3251 * handler for that) that does the dump when signal is received.
3252 */
9349b4f9 3253static int elf_core_dump(int signr, const CPUArchState *env)
edf8e2af 3254{
0429a971
AF		 3255 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3256 const TaskState *ts = (const TaskState *)cpu->opaque;
edf8e2af
MW		 3257 struct vm_area_struct *vma = NULL;
3258 char corefile[PATH_MAX];
3259 struct elf_note_info info;
3260 struct elfhdr elf;
3261 struct elf_phdr phdr;
3262 struct rlimit dumpsize;
3263 struct mm_struct *mm = NULL;
3264 off_t offset = 0, data_offset = 0;
3265 int segs = 0;
3266 int fd = -1;
3267
6afafa86
PM		 3268 init_note_info(&info);
3269
edf8e2af
MW		 3270 errno = 0;
3271 getrlimit(RLIMIT_CORE, &dumpsize);
3272 if (dumpsize.rlim_cur == 0)
d97ef72e 3273 return 0;
edf8e2af
MW		 3274
3275 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3276 return (-errno);
3277
3278 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 3279 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 3280 return (-errno);
3281
3282 /*
3283 * Walk through target process memory mappings and
3284 * set up structure containing this information. After
3285 * this point vma_xxx functions can be used.
3286 */
3287 if ((mm = vma_init()) == NULL)
3288 goto out;
3289
3290 walk_memory_regions(mm, vma_walker);
3291 segs = vma_get_mapping_count(mm);
3292
3293 /*
3294 * Construct valid coredump ELF header. We also
3295 * add one more segment for notes.
3296 */
3297 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3298 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3299 goto out;
3300
b6af0975 3301 /* fill in the in-memory version of notes */
edf8e2af
MW		 3302 if (fill_note_info(&info, signr, env) < 0)
3303 goto out;
3304
3305 offset += sizeof (elf); /* elf header */
3306 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3307
3308 /* write out notes program header */
3309 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3310
3311 offset += info.notes_size;
3312 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3313 goto out;
3314
3315 /*
3316 * ELF specification wants data to start at page boundary so
3317 * we align it here.
3318 */
80f5ce75 3319 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
edf8e2af
MW		 3320
3321 /*
3322 * Write program headers for memory regions mapped in
3323 * the target process.
3324 */
3325 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3326 (void) memset(&phdr, 0, sizeof (phdr));
3327
3328 phdr.p_type = PT_LOAD;
3329 phdr.p_offset = offset;
3330 phdr.p_vaddr = vma->vma_start;
3331 phdr.p_paddr = 0;
3332 phdr.p_filesz = vma_dump_size(vma);
3333 offset += phdr.p_filesz;
3334 phdr.p_memsz = vma->vma_end - vma->vma_start;
3335 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3336 if (vma->vma_flags & PROT_WRITE)
3337 phdr.p_flags |= PF_W;
3338 if (vma->vma_flags & PROT_EXEC)
3339 phdr.p_flags |= PF_X;
3340 phdr.p_align = ELF_EXEC_PAGESIZE;
3341
80f5ce75 3342 bswap_phdr(&phdr, 1);
772034b6
PM		 3343 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3344 goto out;
3345 }
edf8e2af
MW		 3346 }
3347
3348 /*
3349 * Next we write notes just after program headers. No
3350 * alignment needed here.
3351 */
3352 if (write_note_info(&info, fd) < 0)
3353 goto out;
3354
3355 /* align data to page boundary */
edf8e2af
MW		 3356 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3357 goto out;
3358
3359 /*
3360 * Finally we can dump process memory into corefile as well.
3361 */
3362 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3363 abi_ulong addr;
3364 abi_ulong end;
3365
3366 end = vma->vma_start + vma_dump_size(vma);
3367
3368 for (addr = vma->vma_start; addr < end;
d97ef72e 3369 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 3370 char page[TARGET_PAGE_SIZE];
3371 int error;
3372
3373 /*
3374 * Read in page from target process memory and
3375 * write it to coredump file.
3376 */
3377 error = copy_from_user(page, addr, sizeof (page));
3378 if (error != 0) {
49995e17 3379 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 3380 addr);
edf8e2af
MW		 3381 errno = -error;
3382 goto out;
3383 }
3384 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3385 goto out;
3386 }
3387 }
3388
d97ef72e 3389 out:
edf8e2af
MW		 3390 free_note_info(&info);
3391 if (mm != NULL)
3392 vma_delete(mm);
3393 (void) close(fd);
3394
3395 if (errno != 0)
3396 return (-errno);
3397 return (0);
3398}
edf8e2af
MW		 3399#endif /* USE_ELF_CORE_DUMP */
3400
e5fe0c52
PB		 3401void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3402{
3403 init_thread(regs, infop);
3404}
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