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Merge remote-tracking branch 'remotes/kraxel/tags/vga-20200915-pull-request' into...
[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>
30ab9ef2 6#include <sys/shm.h>
31e31b8a 7
3ef693a0 8#include "qemu.h"
76cad711 9#include "disas/disas.h"
f348b6d1 10#include "qemu/path.h"
dc5e9ac7 11#include "qemu/queue.h"
c6a2377f 12#include "qemu/guest-random.h"
6fd59449 13#include "qemu/units.h"
ee947430 14#include "qemu/selfmap.h"
31e31b8a 15
e58ffeb3 16#ifdef _ARCH_PPC64
a6cc84f4 17#undef ARCH_DLINFO
18#undef ELF_PLATFORM
19#undef ELF_HWCAP
ad6919dc 20#undef ELF_HWCAP2
a6cc84f4 21#undef ELF_CLASS
22#undef ELF_DATA
23#undef ELF_ARCH
24#endif
25
edf8e2af
MW		 26#define ELF_OSABI ELFOSABI_SYSV
27
cb33da57
BS		 28/* from personality.h */
29
30/*
31 * Flags for bug emulation.
32 *
33 * These occupy the top three bytes.
34 */
35enum {
d97ef72e
RH		 36 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
37 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
38 descriptors (signal handling) */
39 MMAP_PAGE_ZERO = 0x0100000,
40 ADDR_COMPAT_LAYOUT = 0x0200000,
41 READ_IMPLIES_EXEC = 0x0400000,
42 ADDR_LIMIT_32BIT = 0x0800000,
43 SHORT_INODE = 0x1000000,
44 WHOLE_SECONDS = 0x2000000,
45 STICKY_TIMEOUTS = 0x4000000,
46 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 47};
48
49/*
50 * Personality types.
51 *
52 * These go in the low byte. Avoid using the top bit, it will
53 * conflict with error returns.
54 */
55enum {
d97ef72e
RH		 56 PER_LINUX = 0x0000,
57 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
58 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
59 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
60 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
61 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
62 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
63 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
64 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
65 PER_BSD = 0x0006,
66 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
67 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
68 PER_LINUX32 = 0x0008,
69 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
70 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
71 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
72 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
73 PER_RISCOS = 0x000c,
74 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
75 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
76 PER_OSF4 = 0x000f, /* OSF/1 v4 */
77 PER_HPUX = 0x0010,
78 PER_MASK = 0x00ff,
cb33da57
BS		 79};
80
81/*
82 * Return the base personality without flags.
83 */
d97ef72e 84#define personality(pers) (pers & PER_MASK)
cb33da57 85
3cb10cfa
CL		 86int info_is_fdpic(struct image_info *info)
87{
88 return info->personality == PER_LINUX_FDPIC;
89}
90
83fb7adf
FB		 91/* this flag is uneffective under linux too, should be deleted */
92#ifndef MAP_DENYWRITE
93#define MAP_DENYWRITE 0
94#endif
95
96/* should probably go in elf.h */
97#ifndef ELIBBAD
98#define ELIBBAD 80
99#endif
100
28490231
RH		 101#ifdef TARGET_WORDS_BIGENDIAN
102#define ELF_DATA ELFDATA2MSB
103#else
104#define ELF_DATA ELFDATA2LSB
105#endif
106
a29f998d 107#ifdef TARGET_ABI_MIPSN32
918fc54c
PB		 108typedef abi_ullong target_elf_greg_t;
109#define tswapreg(ptr) tswap64(ptr)
a29f998d
PB		 110#else
111typedef abi_ulong target_elf_greg_t;
112#define tswapreg(ptr) tswapal(ptr)
113#endif
114
21e807fa 115#ifdef USE_UID16
1ddd592f
PB		 116typedef abi_ushort target_uid_t;
117typedef abi_ushort target_gid_t;
21e807fa 118#else
f8fd4fc4
PB		 119typedef abi_uint target_uid_t;
120typedef abi_uint target_gid_t;
21e807fa 121#endif
f8fd4fc4 122typedef abi_int target_pid_t;
21e807fa 123
30ac07d4
FB		 124#ifdef TARGET_I386
125
15338fd7
FB		 126#define ELF_PLATFORM get_elf_platform()
127
128static const char *get_elf_platform(void)
129{
130 static char elf_platform[] = "i386";
a2247f8e 131 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
15338fd7
FB		 132 if (family > 6)
133 family = 6;
134 if (family >= 3)
135 elf_platform[1] = '0' + family;
136 return elf_platform;
137}
138
139#define ELF_HWCAP get_elf_hwcap()
140
141static uint32_t get_elf_hwcap(void)
142{
a2247f8e
AF		 143 X86CPU *cpu = X86_CPU(thread_cpu);
144
145 return cpu->env.features[FEAT_1_EDX];
15338fd7
FB		 146}
147
84409ddb
JM		 148#ifdef TARGET_X86_64
149#define ELF_START_MMAP 0x2aaaaab000ULL
84409ddb
JM		 150
151#define ELF_CLASS ELFCLASS64
84409ddb
JM		 152#define ELF_ARCH EM_X86_64
153
154static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
155{
156 regs->rax = 0;
157 regs->rsp = infop->start_stack;
158 regs->rip = infop->entry;
159}
160
9edc5d79 161#define ELF_NREG 27
c227f099 162typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 163
164/*
165 * Note that ELF_NREG should be 29 as there should be place for
166 * TRAPNO and ERR "registers" as well but linux doesn't dump
167 * those.
168 *
169 * See linux kernel: arch/x86/include/asm/elf.h
170 */
05390248 171static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 172{
173 (*regs)[0] = env->regs[15];
174 (*regs)[1] = env->regs[14];
175 (*regs)[2] = env->regs[13];
176 (*regs)[3] = env->regs[12];
177 (*regs)[4] = env->regs[R_EBP];
178 (*regs)[5] = env->regs[R_EBX];
179 (*regs)[6] = env->regs[11];
180 (*regs)[7] = env->regs[10];
181 (*regs)[8] = env->regs[9];
182 (*regs)[9] = env->regs[8];
183 (*regs)[10] = env->regs[R_EAX];
184 (*regs)[11] = env->regs[R_ECX];
185 (*regs)[12] = env->regs[R_EDX];
186 (*regs)[13] = env->regs[R_ESI];
187 (*regs)[14] = env->regs[R_EDI];
188 (*regs)[15] = env->regs[R_EAX]; /* XXX */
189 (*regs)[16] = env->eip;
190 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
191 (*regs)[18] = env->eflags;
192 (*regs)[19] = env->regs[R_ESP];
193 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
194 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
195 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
196 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
197 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
198 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
199 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
200}
201
84409ddb
JM		 202#else
203
30ac07d4
FB		 204#define ELF_START_MMAP 0x80000000
205
30ac07d4
FB		 206/*
207 * This is used to ensure we don't load something for the wrong architecture.
208 */
209#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
210
211/*
212 * These are used to set parameters in the core dumps.
213 */
d97ef72e 214#define ELF_CLASS ELFCLASS32
d97ef72e 215#define ELF_ARCH EM_386
30ac07d4 216
d97ef72e
RH		 217static inline void init_thread(struct target_pt_regs *regs,
218 struct image_info *infop)
b346ff46
FB		 219{
220 regs->esp = infop->start_stack;
221 regs->eip = infop->entry;
e5fe0c52
PB		 222
223 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
224 starts %edx contains a pointer to a function which might be
225 registered using `atexit'. This provides a mean for the
226 dynamic linker to call DT_FINI functions for shared libraries
227 that have been loaded before the code runs.
228
229 A value of 0 tells we have no such handler. */
230 regs->edx = 0;
b346ff46 231}
9edc5d79 232
9edc5d79 233#define ELF_NREG 17
c227f099 234typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 235
236/*
237 * Note that ELF_NREG should be 19 as there should be place for
238 * TRAPNO and ERR "registers" as well but linux doesn't dump
239 * those.
240 *
241 * See linux kernel: arch/x86/include/asm/elf.h
242 */
05390248 243static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 244{
245 (*regs)[0] = env->regs[R_EBX];
246 (*regs)[1] = env->regs[R_ECX];
247 (*regs)[2] = env->regs[R_EDX];
248 (*regs)[3] = env->regs[R_ESI];
249 (*regs)[4] = env->regs[R_EDI];
250 (*regs)[5] = env->regs[R_EBP];
251 (*regs)[6] = env->regs[R_EAX];
252 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
253 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
254 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
255 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
256 (*regs)[11] = env->regs[R_EAX]; /* XXX */
257 (*regs)[12] = env->eip;
258 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
259 (*regs)[14] = env->eflags;
260 (*regs)[15] = env->regs[R_ESP];
261 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
262}
84409ddb 263#endif
b346ff46 264
9edc5d79 265#define USE_ELF_CORE_DUMP
d97ef72e 266#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 267
268#endif
269
270#ifdef TARGET_ARM
271
24e76ff0
PM		 272#ifndef TARGET_AARCH64
273/* 32 bit ARM definitions */
274
b346ff46
FB		 275#define ELF_START_MMAP 0x80000000
276
b597c3f7 277#define ELF_ARCH EM_ARM
d97ef72e 278#define ELF_CLASS ELFCLASS32
b346ff46 279
d97ef72e
RH		 280static inline void init_thread(struct target_pt_regs *regs,
281 struct image_info *infop)
b346ff46 282{
992f48a0 283 abi_long stack = infop->start_stack;
b346ff46 284 memset(regs, 0, sizeof(*regs));
99033cae 285
167e4cdc
PM		 286 regs->uregs[16] = ARM_CPU_MODE_USR;
287 if (infop->entry & 1) {
288 regs->uregs[16] |= CPSR_T;
289 }
290 regs->uregs[15] = infop->entry & 0xfffffffe;
291 regs->uregs[13] = infop->start_stack;
2f619698 292 /* FIXME - what to for failure of get_user()? */
167e4cdc
PM		 293 get_user_ual(regs->uregs[2], stack + 8); /* envp */
294 get_user_ual(regs->uregs[1], stack + 4); /* envp */
a1516e92 295 /* XXX: it seems that r0 is zeroed after ! */
167e4cdc 296 regs->uregs[0] = 0;
e5fe0c52 297 /* For uClinux PIC binaries. */
863cf0b7 298 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
167e4cdc 299 regs->uregs[10] = infop->start_data;
3cb10cfa
CL		 300
301 /* Support ARM FDPIC. */
302 if (info_is_fdpic(infop)) {
303 /* As described in the ABI document, r7 points to the loadmap info
304 * prepared by the kernel. If an interpreter is needed, r8 points
305 * to the interpreter loadmap and r9 points to the interpreter
306 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
307 * r9 points to the main program PT_DYNAMIC info.
308 */
309 regs->uregs[7] = infop->loadmap_addr;
310 if (infop->interpreter_loadmap_addr) {
311 /* Executable is dynamically loaded. */
312 regs->uregs[8] = infop->interpreter_loadmap_addr;
313 regs->uregs[9] = infop->interpreter_pt_dynamic_addr;
314 } else {
315 regs->uregs[8] = 0;
316 regs->uregs[9] = infop->pt_dynamic_addr;
317 }
318 }
b346ff46
FB		 319}
320
edf8e2af 321#define ELF_NREG 18
c227f099 322typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 323
05390248 324static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
edf8e2af 325{
86cd7b2d
PB		 326 (*regs)[0] = tswapreg(env->regs[0]);
327 (*regs)[1] = tswapreg(env->regs[1]);
328 (*regs)[2] = tswapreg(env->regs[2]);
329 (*regs)[3] = tswapreg(env->regs[3]);
330 (*regs)[4] = tswapreg(env->regs[4]);
331 (*regs)[5] = tswapreg(env->regs[5]);
332 (*regs)[6] = tswapreg(env->regs[6]);
333 (*regs)[7] = tswapreg(env->regs[7]);
334 (*regs)[8] = tswapreg(env->regs[8]);
335 (*regs)[9] = tswapreg(env->regs[9]);
336 (*regs)[10] = tswapreg(env->regs[10]);
337 (*regs)[11] = tswapreg(env->regs[11]);
338 (*regs)[12] = tswapreg(env->regs[12]);
339 (*regs)[13] = tswapreg(env->regs[13]);
340 (*regs)[14] = tswapreg(env->regs[14]);
341 (*regs)[15] = tswapreg(env->regs[15]);
342
343 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
344 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
edf8e2af
MW		 345}
346
30ac07d4 347#define USE_ELF_CORE_DUMP
d97ef72e 348#define ELF_EXEC_PAGESIZE 4096
30ac07d4 349
afce2927
FB		 350enum
351{
d97ef72e
RH		 352 ARM_HWCAP_ARM_SWP = 1 << 0,
353 ARM_HWCAP_ARM_HALF = 1 << 1,
354 ARM_HWCAP_ARM_THUMB = 1 << 2,
355 ARM_HWCAP_ARM_26BIT = 1 << 3,
356 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
357 ARM_HWCAP_ARM_FPA = 1 << 5,
358 ARM_HWCAP_ARM_VFP = 1 << 6,
359 ARM_HWCAP_ARM_EDSP = 1 << 7,
360 ARM_HWCAP_ARM_JAVA = 1 << 8,
361 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
43ce393e
PM		 362 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
363 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
364 ARM_HWCAP_ARM_NEON = 1 << 12,
365 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
366 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
24682654
PM		 367 ARM_HWCAP_ARM_TLS = 1 << 15,
368 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
369 ARM_HWCAP_ARM_IDIVA = 1 << 17,
370 ARM_HWCAP_ARM_IDIVT = 1 << 18,
371 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
372 ARM_HWCAP_ARM_LPAE = 1 << 20,
373 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
afce2927
FB		 374};
375
ad6919dc
PM		 376enum {
377 ARM_HWCAP2_ARM_AES = 1 << 0,
378 ARM_HWCAP2_ARM_PMULL = 1 << 1,
379 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
380 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
381 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
382};
383
6b1275ff
PM		 384/* The commpage only exists for 32 bit kernels */
385
ee947430 386#define ARM_COMMPAGE (intptr_t)0xffff0f00u
806d1021 387
ee947430
AB		 388static bool init_guest_commpage(void)
389{
390 void *want = g2h(ARM_COMMPAGE & -qemu_host_page_size);
391 void *addr = mmap(want, qemu_host_page_size, PROT_READ | PROT_WRITE,
5c3e87f3 392 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
97cc7560 393
ee947430
AB		 394 if (addr == MAP_FAILED) {
395 perror("Allocating guest commpage");
396 exit(EXIT_FAILURE);
97cc7560 397 }
ee947430
AB		 398 if (addr != want) {
399 return false;
97cc7560
DDAG		 400 }
401
ee947430
AB		 402 /* Set kernel helper versions; rest of page is 0. */
403 __put_user(5, (uint32_t *)g2h(0xffff0ffcu));
97cc7560 404
ee947430 405 if (mprotect(addr, qemu_host_page_size, PROT_READ)) {
97cc7560 406 perror("Protecting guest commpage");
ee947430 407 exit(EXIT_FAILURE);
97cc7560 408 }
ee947430 409 return true;
97cc7560 410}
adf050b1
BC		 411
412#define ELF_HWCAP get_elf_hwcap()
ad6919dc 413#define ELF_HWCAP2 get_elf_hwcap2()
adf050b1
BC		 414
415static uint32_t get_elf_hwcap(void)
416{
a2247f8e 417 ARMCPU *cpu = ARM_CPU(thread_cpu);
adf050b1
BC		 418 uint32_t hwcaps = 0;
419
420 hwcaps |= ARM_HWCAP_ARM_SWP;
421 hwcaps |= ARM_HWCAP_ARM_HALF;
422 hwcaps |= ARM_HWCAP_ARM_THUMB;
423 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
adf050b1
BC		 424
425 /* probe for the extra features */
426#define GET_FEATURE(feat, hwcap) \
a2247f8e 427 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
962fcbf2
RH		 428
429#define GET_FEATURE_ID(feat, hwcap) \
430 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
431
24682654
PM		 432 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
433 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
adf050b1
BC		 434 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
435 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
436 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
24682654 437 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
bfa8a370 438 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
873b73c0
PM		 439 GET_FEATURE_ID(aa32_arm_div, ARM_HWCAP_ARM_IDIVA);
440 GET_FEATURE_ID(aa32_thumb_div, ARM_HWCAP_ARM_IDIVT);
bfa8a370
RH		 441 GET_FEATURE_ID(aa32_vfp, ARM_HWCAP_ARM_VFP);
442
443 if (cpu_isar_feature(aa32_fpsp_v3, cpu) ||
444 cpu_isar_feature(aa32_fpdp_v3, cpu)) {
445 hwcaps |= ARM_HWCAP_ARM_VFPv3;
446 if (cpu_isar_feature(aa32_simd_r32, cpu)) {
447 hwcaps |= ARM_HWCAP_ARM_VFPD32;
448 } else {
449 hwcaps |= ARM_HWCAP_ARM_VFPv3D16;
450 }
451 }
452 GET_FEATURE_ID(aa32_simdfmac, ARM_HWCAP_ARM_VFPv4);
adf050b1
BC		 453
454 return hwcaps;
455}
afce2927 456
ad6919dc
PM		 457static uint32_t get_elf_hwcap2(void)
458{
459 ARMCPU *cpu = ARM_CPU(thread_cpu);
460 uint32_t hwcaps = 0;
461
962fcbf2
RH		 462 GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES);
463 GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL);
464 GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1);
465 GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2);
466 GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32);
ad6919dc
PM		 467 return hwcaps;
468}
469
470#undef GET_FEATURE
962fcbf2 471#undef GET_FEATURE_ID
ad6919dc 472
13ec4ec3
RH		 473#define ELF_PLATFORM get_elf_platform()
474
475static const char *get_elf_platform(void)
476{
477 CPUARMState *env = thread_cpu->env_ptr;
478
479#ifdef TARGET_WORDS_BIGENDIAN
480# define END "b"
481#else
482# define END "l"
483#endif
484
485 if (arm_feature(env, ARM_FEATURE_V8)) {
486 return "v8" END;
487 } else if (arm_feature(env, ARM_FEATURE_V7)) {
488 if (arm_feature(env, ARM_FEATURE_M)) {
489 return "v7m" END;
490 } else {
491 return "v7" END;
492 }
493 } else if (arm_feature(env, ARM_FEATURE_V6)) {
494 return "v6" END;
495 } else if (arm_feature(env, ARM_FEATURE_V5)) {
496 return "v5" END;
497 } else {
498 return "v4" END;
499 }
500
501#undef END
502}
503
24e76ff0
PM		 504#else
505/* 64 bit ARM definitions */
506#define ELF_START_MMAP 0x80000000
507
b597c3f7 508#define ELF_ARCH EM_AARCH64
24e76ff0 509#define ELF_CLASS ELFCLASS64
e20e3ec9
RH		 510#ifdef TARGET_WORDS_BIGENDIAN
511# define ELF_PLATFORM "aarch64_be"
512#else
513# define ELF_PLATFORM "aarch64"
514#endif
24e76ff0
PM		 515
516static inline void init_thread(struct target_pt_regs *regs,
517 struct image_info *infop)
518{
519 abi_long stack = infop->start_stack;
520 memset(regs, 0, sizeof(*regs));
521
522 regs->pc = infop->entry & ~0x3ULL;
523 regs->sp = stack;
524}
525
526#define ELF_NREG 34
527typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
528
529static void elf_core_copy_regs(target_elf_gregset_t *regs,
530 const CPUARMState *env)
531{
532 int i;
533
534 for (i = 0; i < 32; i++) {
535 (*regs)[i] = tswapreg(env->xregs[i]);
536 }
537 (*regs)[32] = tswapreg(env->pc);
538 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
539}
540
541#define USE_ELF_CORE_DUMP
542#define ELF_EXEC_PAGESIZE 4096
543
544enum {
545 ARM_HWCAP_A64_FP = 1 << 0,
546 ARM_HWCAP_A64_ASIMD = 1 << 1,
547 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
548 ARM_HWCAP_A64_AES = 1 << 3,
549 ARM_HWCAP_A64_PMULL = 1 << 4,
550 ARM_HWCAP_A64_SHA1 = 1 << 5,
551 ARM_HWCAP_A64_SHA2 = 1 << 6,
552 ARM_HWCAP_A64_CRC32 = 1 << 7,
955f56d4
AB		 553 ARM_HWCAP_A64_ATOMICS = 1 << 8,
554 ARM_HWCAP_A64_FPHP = 1 << 9,
555 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
556 ARM_HWCAP_A64_CPUID = 1 << 11,
557 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
558 ARM_HWCAP_A64_JSCVT = 1 << 13,
559 ARM_HWCAP_A64_FCMA = 1 << 14,
560 ARM_HWCAP_A64_LRCPC = 1 << 15,
561 ARM_HWCAP_A64_DCPOP = 1 << 16,
562 ARM_HWCAP_A64_SHA3 = 1 << 17,
563 ARM_HWCAP_A64_SM3 = 1 << 18,
564 ARM_HWCAP_A64_SM4 = 1 << 19,
565 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
566 ARM_HWCAP_A64_SHA512 = 1 << 21,
567 ARM_HWCAP_A64_SVE = 1 << 22,
0083a1fa
RH		 568 ARM_HWCAP_A64_ASIMDFHM = 1 << 23,
569 ARM_HWCAP_A64_DIT = 1 << 24,
570 ARM_HWCAP_A64_USCAT = 1 << 25,
571 ARM_HWCAP_A64_ILRCPC = 1 << 26,
572 ARM_HWCAP_A64_FLAGM = 1 << 27,
573 ARM_HWCAP_A64_SSBS = 1 << 28,
574 ARM_HWCAP_A64_SB = 1 << 29,
575 ARM_HWCAP_A64_PACA = 1 << 30,
576 ARM_HWCAP_A64_PACG = 1UL << 31,
2041df4a
RH		 577
578 ARM_HWCAP2_A64_DCPODP = 1 << 0,
579 ARM_HWCAP2_A64_SVE2 = 1 << 1,
580 ARM_HWCAP2_A64_SVEAES = 1 << 2,
581 ARM_HWCAP2_A64_SVEPMULL = 1 << 3,
582 ARM_HWCAP2_A64_SVEBITPERM = 1 << 4,
583 ARM_HWCAP2_A64_SVESHA3 = 1 << 5,
584 ARM_HWCAP2_A64_SVESM4 = 1 << 6,
585 ARM_HWCAP2_A64_FLAGM2 = 1 << 7,
586 ARM_HWCAP2_A64_FRINT = 1 << 8,
24e76ff0
PM		 587};
588
2041df4a
RH		 589#define ELF_HWCAP get_elf_hwcap()
590#define ELF_HWCAP2 get_elf_hwcap2()
591
592#define GET_FEATURE_ID(feat, hwcap) \
593 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
24e76ff0
PM		 594
595static uint32_t get_elf_hwcap(void)
596{
597 ARMCPU *cpu = ARM_CPU(thread_cpu);
598 uint32_t hwcaps = 0;
599
600 hwcaps |= ARM_HWCAP_A64_FP;
601 hwcaps |= ARM_HWCAP_A64_ASIMD;
37020ff1 602 hwcaps |= ARM_HWCAP_A64_CPUID;
24e76ff0
PM		 603
604 /* probe for the extra features */
962fcbf2
RH		 605
606 GET_FEATURE_ID(aa64_aes, ARM_HWCAP_A64_AES);
607 GET_FEATURE_ID(aa64_pmull, ARM_HWCAP_A64_PMULL);
608 GET_FEATURE_ID(aa64_sha1, ARM_HWCAP_A64_SHA1);
609 GET_FEATURE_ID(aa64_sha256, ARM_HWCAP_A64_SHA2);
610 GET_FEATURE_ID(aa64_sha512, ARM_HWCAP_A64_SHA512);
611 GET_FEATURE_ID(aa64_crc32, ARM_HWCAP_A64_CRC32);
612 GET_FEATURE_ID(aa64_sha3, ARM_HWCAP_A64_SHA3);
613 GET_FEATURE_ID(aa64_sm3, ARM_HWCAP_A64_SM3);
614 GET_FEATURE_ID(aa64_sm4, ARM_HWCAP_A64_SM4);
5763190f 615 GET_FEATURE_ID(aa64_fp16, ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
962fcbf2
RH		 616 GET_FEATURE_ID(aa64_atomics, ARM_HWCAP_A64_ATOMICS);
617 GET_FEATURE_ID(aa64_rdm, ARM_HWCAP_A64_ASIMDRDM);
618 GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP);
619 GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA);
cd208a1c 620 GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE);
29d26ab2 621 GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG);
1c9af3a9
RH		 622 GET_FEATURE_ID(aa64_fhm, ARM_HWCAP_A64_ASIMDFHM);
623 GET_FEATURE_ID(aa64_jscvt, ARM_HWCAP_A64_JSCVT);
9888bd1e 624 GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB);
b89d9c98 625 GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM);
0d57b499 626 GET_FEATURE_ID(aa64_dcpop, ARM_HWCAP_A64_DCPOP);
2677cf9f 627 GET_FEATURE_ID(aa64_rcpc_8_3, ARM_HWCAP_A64_LRCPC);
a1229109 628 GET_FEATURE_ID(aa64_rcpc_8_4, ARM_HWCAP_A64_ILRCPC);
962fcbf2 629
2041df4a
RH		 630 return hwcaps;
631}
632
633static uint32_t get_elf_hwcap2(void)
634{
635 ARMCPU *cpu = ARM_CPU(thread_cpu);
636 uint32_t hwcaps = 0;
637
0d57b499 638 GET_FEATURE_ID(aa64_dcpodp, ARM_HWCAP2_A64_DCPODP);
2041df4a
RH		 639 GET_FEATURE_ID(aa64_condm_5, ARM_HWCAP2_A64_FLAGM2);
640 GET_FEATURE_ID(aa64_frint, ARM_HWCAP2_A64_FRINT);
24e76ff0
PM		 641
642 return hwcaps;
643}
644
2041df4a
RH		 645#undef GET_FEATURE_ID
646
24e76ff0
PM		 647#endif /* not TARGET_AARCH64 */
648#endif /* TARGET_ARM */
30ac07d4 649
853d6f7a 650#ifdef TARGET_SPARC
a315a145 651#ifdef TARGET_SPARC64
853d6f7a
FB		 652
653#define ELF_START_MMAP 0x80000000
cf973e46
AT		 654#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
655 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
992f48a0 656#ifndef TARGET_ABI32
cb33da57 657#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 658#else
659#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
660#endif
853d6f7a 661
a315a145 662#define ELF_CLASS ELFCLASS64
5ef54116
FB		 663#define ELF_ARCH EM_SPARCV9
664
d97ef72e 665#define STACK_BIAS 2047
a315a145 666
d97ef72e
RH		 667static inline void init_thread(struct target_pt_regs *regs,
668 struct image_info *infop)
a315a145 669{
992f48a0 670#ifndef TARGET_ABI32
a315a145 671 regs->tstate = 0;
992f48a0 672#endif
a315a145
FB		 673 regs->pc = infop->entry;
674 regs->npc = regs->pc + 4;
675 regs->y = 0;
992f48a0
BS		 676#ifdef TARGET_ABI32
677 regs->u_regs[14] = infop->start_stack - 16 * 4;
678#else
cb33da57
BS		 679 if (personality(infop->personality) == PER_LINUX32)
680 regs->u_regs[14] = infop->start_stack - 16 * 4;
681 else
682 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
992f48a0 683#endif
a315a145
FB		 684}
685
686#else
687#define ELF_START_MMAP 0x80000000
cf973e46
AT		 688#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
689 | HWCAP_SPARC_MULDIV)
a315a145 690
853d6f7a 691#define ELF_CLASS ELFCLASS32
853d6f7a
FB		 692#define ELF_ARCH EM_SPARC
693
d97ef72e
RH		 694static inline void init_thread(struct target_pt_regs *regs,
695 struct image_info *infop)
853d6f7a 696{
f5155289
FB		 697 regs->psr = 0;
698 regs->pc = infop->entry;
699 regs->npc = regs->pc + 4;
700 regs->y = 0;
701 regs->u_regs[14] = infop->start_stack - 16 * 4;
853d6f7a
FB		 702}
703
a315a145 704#endif
853d6f7a
FB		 705#endif
706
67867308
FB		 707#ifdef TARGET_PPC
708
4ecd4d16 709#define ELF_MACHINE PPC_ELF_MACHINE
67867308
FB		 710#define ELF_START_MMAP 0x80000000
711
e85e7c6e 712#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
84409ddb
JM		 713
714#define elf_check_arch(x) ( (x) == EM_PPC64 )
715
d97ef72e 716#define ELF_CLASS ELFCLASS64
84409ddb
JM		 717
718#else
719
d97ef72e 720#define ELF_CLASS ELFCLASS32
84409ddb
JM		 721
722#endif
723
d97ef72e 724#define ELF_ARCH EM_PPC
67867308 725
df84e4f3
NF		 726/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
727 See arch/powerpc/include/asm/cputable.h. */
728enum {
3efa9a67 729 QEMU_PPC_FEATURE_32 = 0x80000000,
730 QEMU_PPC_FEATURE_64 = 0x40000000,
731 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
732 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
733 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
734 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
735 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
736 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
737 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
738 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
739 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
740 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
741 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
742 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
743 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
744 QEMU_PPC_FEATURE_CELL = 0x00010000,
745 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
746 QEMU_PPC_FEATURE_SMT = 0x00004000,
747 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
748 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
749 QEMU_PPC_FEATURE_PA6T = 0x00000800,
750 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
751 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
752 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
753 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
754 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
755
756 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
757 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
a60438dd
TM		 758
759 /* Feature definitions in AT_HWCAP2. */
760 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
761 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
762 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
763 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
764 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
765 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
24c373ec
LV		 766 QEMU_PPC_FEATURE2_VEC_CRYPTO = 0x02000000,
767 QEMU_PPC_FEATURE2_HTM_NOSC = 0x01000000,
be0c46d4 768 QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
24c373ec
LV		 769 QEMU_PPC_FEATURE2_HAS_IEEE128 = 0x00400000, /* VSX IEEE Bin Float 128-bit */
770 QEMU_PPC_FEATURE2_DARN = 0x00200000, /* darn random number insn */
771 QEMU_PPC_FEATURE2_SCV = 0x00100000, /* scv syscall */
772 QEMU_PPC_FEATURE2_HTM_NO_SUSPEND = 0x00080000, /* TM w/o suspended state */
df84e4f3
NF		 773};
774
775#define ELF_HWCAP get_elf_hwcap()
776
777static uint32_t get_elf_hwcap(void)
778{
a2247f8e 779 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
df84e4f3
NF		 780 uint32_t features = 0;
781
782 /* We don't have to be terribly complete here; the high points are
783 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 784#define GET_FEATURE(flag, feature) \
a2247f8e 785 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
58eb5308
MW		 786#define GET_FEATURE2(flags, feature) \
787 do { \
788 if ((cpu->env.insns_flags2 & flags) == flags) { \
789 features |= feature; \
790 } \
791 } while (0)
3efa9a67 792 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
793 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
794 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
795 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
796 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
797 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
798 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
799 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
0e019746
TM		 800 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
801 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
802 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
803 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
804 QEMU_PPC_FEATURE_ARCH_2_06);
df84e4f3 805#undef GET_FEATURE
0e019746 806#undef GET_FEATURE2
df84e4f3
NF		 807
808 return features;
809}
810
a60438dd
TM		 811#define ELF_HWCAP2 get_elf_hwcap2()
812
813static uint32_t get_elf_hwcap2(void)
814{
815 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
816 uint32_t features = 0;
817
818#define GET_FEATURE(flag, feature) \
819 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
820#define GET_FEATURE2(flag, feature) \
821 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
822
823 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
824 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
825 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
24c373ec
LV		 826 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07 |
827 QEMU_PPC_FEATURE2_VEC_CRYPTO);
828 GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00 |
829 QEMU_PPC_FEATURE2_DARN);
a60438dd
TM		 830
831#undef GET_FEATURE
832#undef GET_FEATURE2
833
834 return features;
835}
836
f5155289
FB		 837/*
838 * The requirements here are:
839 * - keep the final alignment of sp (sp & 0xf)
840 * - make sure the 32-bit value at the first 16 byte aligned position of
841 * AUXV is greater than 16 for glibc compatibility.
842 * AT_IGNOREPPC is used for that.
843 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
844 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
845 */
0bccf03d 846#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 847#define ARCH_DLINFO \
848 do { \
623e250a 849 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
d97ef72e 850 /* \
82991bed
PM		 851 * Handle glibc compatibility: these magic entries must \
852 * be at the lowest addresses in the final auxv. \
d97ef72e
RH		 853 */ \
854 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
855 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
82991bed
PM		 856 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
857 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
858 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
d97ef72e 859 } while (0)
f5155289 860
67867308
FB		 861static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
862{
67867308 863 _regs->gpr[1] = infop->start_stack;
e85e7c6e 864#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
d90b94cd 865 if (get_ppc64_abi(infop) < 2) {
2ccf97ec
PM		 866 uint64_t val;
867 get_user_u64(val, infop->entry + 8);
868 _regs->gpr[2] = val + infop->load_bias;
869 get_user_u64(val, infop->entry);
870 infop->entry = val + infop->load_bias;
d90b94cd
DK		 871 } else {
872 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
873 }
84409ddb 874#endif
67867308
FB		 875 _regs->nip = infop->entry;
876}
877
e2f3e741
NF		 878/* See linux kernel: arch/powerpc/include/asm/elf.h. */
879#define ELF_NREG 48
880typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
881
05390248 882static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
e2f3e741
NF		 883{
884 int i;
885 target_ulong ccr = 0;
886
887 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
86cd7b2d 888 (*regs)[i] = tswapreg(env->gpr[i]);
e2f3e741
NF		 889 }
890
86cd7b2d
PB		 891 (*regs)[32] = tswapreg(env->nip);
892 (*regs)[33] = tswapreg(env->msr);
893 (*regs)[35] = tswapreg(env->ctr);
894 (*regs)[36] = tswapreg(env->lr);
895 (*regs)[37] = tswapreg(env->xer);
e2f3e741
NF		 896
897 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
898 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
899 }
86cd7b2d 900 (*regs)[38] = tswapreg(ccr);
e2f3e741
NF		 901}
902
903#define USE_ELF_CORE_DUMP
d97ef72e 904#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 905
906#endif
907
048f6b4d
FB		 908#ifdef TARGET_MIPS
909
910#define ELF_START_MMAP 0x80000000
911
388bb21a
TS		 912#ifdef TARGET_MIPS64
913#define ELF_CLASS ELFCLASS64
914#else
048f6b4d 915#define ELF_CLASS ELFCLASS32
388bb21a 916#endif
048f6b4d
FB		 917#define ELF_ARCH EM_MIPS
918
f72541f3
AM		 919#define elf_check_arch(x) ((x) == EM_MIPS || (x) == EM_NANOMIPS)
920
ace3d654
CMAB		 921#ifdef TARGET_ABI_MIPSN32
922#define elf_check_abi(x) ((x) & EF_MIPS_ABI2)
923#else
924#define elf_check_abi(x) (!((x) & EF_MIPS_ABI2))
925#endif
926
d97ef72e
RH		 927static inline void init_thread(struct target_pt_regs *regs,
928 struct image_info *infop)
048f6b4d 929{
623a930e 930 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 931 regs->cp0_epc = infop->entry;
932 regs->regs[29] = infop->start_stack;
933}
934
51e52606
NF		 935/* See linux kernel: arch/mips/include/asm/elf.h. */
936#define ELF_NREG 45
937typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
938
939/* See linux kernel: arch/mips/include/asm/reg.h. */
940enum {
941#ifdef TARGET_MIPS64
942 TARGET_EF_R0 = 0,
943#else
944 TARGET_EF_R0 = 6,
945#endif
946 TARGET_EF_R26 = TARGET_EF_R0 + 26,
947 TARGET_EF_R27 = TARGET_EF_R0 + 27,
948 TARGET_EF_LO = TARGET_EF_R0 + 32,
949 TARGET_EF_HI = TARGET_EF_R0 + 33,
950 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
951 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
952 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
953 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
954};
955
956/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 957static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
51e52606
NF		 958{
959 int i;
960
961 for (i = 0; i < TARGET_EF_R0; i++) {
962 (*regs)[i] = 0;
963 }
964 (*regs)[TARGET_EF_R0] = 0;
965
966 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
a29f998d 967 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
51e52606
NF		 968 }
969
970 (*regs)[TARGET_EF_R26] = 0;
971 (*regs)[TARGET_EF_R27] = 0;
a29f998d
PB		 972 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
973 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
974 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
975 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
976 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
977 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
51e52606
NF		 978}
979
980#define USE_ELF_CORE_DUMP
388bb21a
TS		 981#define ELF_EXEC_PAGESIZE 4096
982
46a1ee4f
JC		 983/* See arch/mips/include/uapi/asm/hwcap.h. */
984enum {
985 HWCAP_MIPS_R6 = (1 << 0),
986 HWCAP_MIPS_MSA = (1 << 1),
987};
988
989#define ELF_HWCAP get_elf_hwcap()
990
991static uint32_t get_elf_hwcap(void)
992{
993 MIPSCPU *cpu = MIPS_CPU(thread_cpu);
994 uint32_t hwcaps = 0;
995
996#define GET_FEATURE(flag, hwcap) \
997 do { if (cpu->env.insn_flags & (flag)) { hwcaps |= hwcap; } } while (0)
998
999 GET_FEATURE(ISA_MIPS32R6 | ISA_MIPS64R6, HWCAP_MIPS_R6);
1000 GET_FEATURE(ASE_MSA, HWCAP_MIPS_MSA);
1001
1002#undef GET_FEATURE
1003
1004 return hwcaps;
1005}
1006
048f6b4d
FB		 1007#endif /* TARGET_MIPS */
1008
b779e29e
EI		 1009#ifdef TARGET_MICROBLAZE
1010
1011#define ELF_START_MMAP 0x80000000
1012
0d5d4699 1013#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 1014
1015#define ELF_CLASS ELFCLASS32
0d5d4699 1016#define ELF_ARCH EM_MICROBLAZE
b779e29e 1017
d97ef72e
RH		 1018static inline void init_thread(struct target_pt_regs *regs,
1019 struct image_info *infop)
b779e29e
EI		 1020{
1021 regs->pc = infop->entry;
1022 regs->r1 = infop->start_stack;
1023
1024}
1025
b779e29e
EI		 1026#define ELF_EXEC_PAGESIZE 4096
1027
e4cbd44d
EI		 1028#define USE_ELF_CORE_DUMP
1029#define ELF_NREG 38
1030typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1031
1032/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 1033static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
e4cbd44d
EI		 1034{
1035 int i, pos = 0;
1036
1037 for (i = 0; i < 32; i++) {
86cd7b2d 1038 (*regs)[pos++] = tswapreg(env->regs[i]);
e4cbd44d
EI		 1039 }
1040
af20a93a 1041 (*regs)[pos++] = tswapreg(env->pc);
1074c0fb 1042 (*regs)[pos++] = tswapreg(mb_cpu_read_msr(env));
af20a93a
RH		 1043 (*regs)[pos++] = 0;
1044 (*regs)[pos++] = tswapreg(env->ear);
1045 (*regs)[pos++] = 0;
1046 (*regs)[pos++] = tswapreg(env->esr);
e4cbd44d
EI		 1047}
1048
b779e29e
EI		 1049#endif /* TARGET_MICROBLAZE */
1050
a0a839b6
MV		 1051#ifdef TARGET_NIOS2
1052
1053#define ELF_START_MMAP 0x80000000
1054
1055#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1056
1057#define ELF_CLASS ELFCLASS32
1058#define ELF_ARCH EM_ALTERA_NIOS2
1059
1060static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1061{
1062 regs->ea = infop->entry;
1063 regs->sp = infop->start_stack;
1064 regs->estatus = 0x3;
1065}
1066
1067#define ELF_EXEC_PAGESIZE 4096
1068
1069#define USE_ELF_CORE_DUMP
1070#define ELF_NREG 49
1071typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1072
1073/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1074static void elf_core_copy_regs(target_elf_gregset_t *regs,
1075 const CPUNios2State *env)
1076{
1077 int i;
1078
1079 (*regs)[0] = -1;
1080 for (i = 1; i < 8; i++) /* r0-r7 */
1081 (*regs)[i] = tswapreg(env->regs[i + 7]);
1082
1083 for (i = 8; i < 16; i++) /* r8-r15 */
1084 (*regs)[i] = tswapreg(env->regs[i - 8]);
1085
1086 for (i = 16; i < 24; i++) /* r16-r23 */
1087 (*regs)[i] = tswapreg(env->regs[i + 7]);
1088 (*regs)[24] = -1; /* R_ET */
1089 (*regs)[25] = -1; /* R_BT */
1090 (*regs)[26] = tswapreg(env->regs[R_GP]);
1091 (*regs)[27] = tswapreg(env->regs[R_SP]);
1092 (*regs)[28] = tswapreg(env->regs[R_FP]);
1093 (*regs)[29] = tswapreg(env->regs[R_EA]);
1094 (*regs)[30] = -1; /* R_SSTATUS */
1095 (*regs)[31] = tswapreg(env->regs[R_RA]);
1096
1097 (*regs)[32] = tswapreg(env->regs[R_PC]);
1098
1099 (*regs)[33] = -1; /* R_STATUS */
1100 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1101
1102 for (i = 35; i < 49; i++) /* ... */
1103 (*regs)[i] = -1;
1104}
1105
1106#endif /* TARGET_NIOS2 */
1107
d962783e
JL		 1108#ifdef TARGET_OPENRISC
1109
1110#define ELF_START_MMAP 0x08000000
1111
d962783e
JL		 1112#define ELF_ARCH EM_OPENRISC
1113#define ELF_CLASS ELFCLASS32
1114#define ELF_DATA ELFDATA2MSB
1115
1116static inline void init_thread(struct target_pt_regs *regs,
1117 struct image_info *infop)
1118{
1119 regs->pc = infop->entry;
1120 regs->gpr[1] = infop->start_stack;
1121}
1122
1123#define USE_ELF_CORE_DUMP
1124#define ELF_EXEC_PAGESIZE 8192
1125
1126/* See linux kernel arch/openrisc/include/asm/elf.h. */
1127#define ELF_NREG 34 /* gprs and pc, sr */
1128typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1129
1130static void elf_core_copy_regs(target_elf_gregset_t *regs,
1131 const CPUOpenRISCState *env)
1132{
1133 int i;
1134
1135 for (i = 0; i < 32; i++) {
d89e71e8 1136 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
d962783e 1137 }
86cd7b2d 1138 (*regs)[32] = tswapreg(env->pc);
84775c43 1139 (*regs)[33] = tswapreg(cpu_get_sr(env));
d962783e
JL		 1140}
1141#define ELF_HWCAP 0
1142#define ELF_PLATFORM NULL
1143
1144#endif /* TARGET_OPENRISC */
1145
fdf9b3e8
FB		 1146#ifdef TARGET_SH4
1147
1148#define ELF_START_MMAP 0x80000000
1149
fdf9b3e8 1150#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 1151#define ELF_ARCH EM_SH
1152
d97ef72e
RH		 1153static inline void init_thread(struct target_pt_regs *regs,
1154 struct image_info *infop)
fdf9b3e8 1155{
d97ef72e
RH		 1156 /* Check other registers XXXXX */
1157 regs->pc = infop->entry;
1158 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 1159}
1160
7631c97e
NF		 1161/* See linux kernel: arch/sh/include/asm/elf.h. */
1162#define ELF_NREG 23
1163typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1164
1165/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1166enum {
1167 TARGET_REG_PC = 16,
1168 TARGET_REG_PR = 17,
1169 TARGET_REG_SR = 18,
1170 TARGET_REG_GBR = 19,
1171 TARGET_REG_MACH = 20,
1172 TARGET_REG_MACL = 21,
1173 TARGET_REG_SYSCALL = 22
1174};
1175
d97ef72e 1176static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
05390248 1177 const CPUSH4State *env)
7631c97e
NF		 1178{
1179 int i;
1180
1181 for (i = 0; i < 16; i++) {
72cd500b 1182 (*regs)[i] = tswapreg(env->gregs[i]);
7631c97e
NF		 1183 }
1184
86cd7b2d
PB		 1185 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1186 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1187 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1188 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1189 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1190 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
7631c97e
NF		 1191 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1192}
1193
1194#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 1195#define ELF_EXEC_PAGESIZE 4096
1196
e42fd944
RH		 1197enum {
1198 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1199 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1200 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1201 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1202 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1203 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1204 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1205 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1206 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1207 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1208};
1209
1210#define ELF_HWCAP get_elf_hwcap()
1211
1212static uint32_t get_elf_hwcap(void)
1213{
1214 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1215 uint32_t hwcap = 0;
1216
1217 hwcap |= SH_CPU_HAS_FPU;
1218
1219 if (cpu->env.features & SH_FEATURE_SH4A) {
1220 hwcap |= SH_CPU_HAS_LLSC;
1221 }
1222
1223 return hwcap;
1224}
1225
fdf9b3e8
FB		 1226#endif
1227
48733d19
TS		 1228#ifdef TARGET_CRIS
1229
1230#define ELF_START_MMAP 0x80000000
1231
48733d19 1232#define ELF_CLASS ELFCLASS32
48733d19
TS		 1233#define ELF_ARCH EM_CRIS
1234
d97ef72e
RH		 1235static inline void init_thread(struct target_pt_regs *regs,
1236 struct image_info *infop)
48733d19 1237{
d97ef72e 1238 regs->erp = infop->entry;
48733d19
TS		 1239}
1240
48733d19
TS		 1241#define ELF_EXEC_PAGESIZE 8192
1242
1243#endif
1244
e6e5906b
PB		 1245#ifdef TARGET_M68K
1246
1247#define ELF_START_MMAP 0x80000000
1248
d97ef72e 1249#define ELF_CLASS ELFCLASS32
d97ef72e 1250#define ELF_ARCH EM_68K
e6e5906b
PB		 1251
1252/* ??? Does this need to do anything?
d97ef72e 1253 #define ELF_PLAT_INIT(_r) */
e6e5906b 1254
d97ef72e
RH		 1255static inline void init_thread(struct target_pt_regs *regs,
1256 struct image_info *infop)
e6e5906b
PB		 1257{
1258 regs->usp = infop->start_stack;
1259 regs->sr = 0;
1260 regs->pc = infop->entry;
1261}
1262
7a93cc55
NF		 1263/* See linux kernel: arch/m68k/include/asm/elf.h. */
1264#define ELF_NREG 20
1265typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1266
05390248 1267static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
7a93cc55 1268{
86cd7b2d
PB		 1269 (*regs)[0] = tswapreg(env->dregs[1]);
1270 (*regs)[1] = tswapreg(env->dregs[2]);
1271 (*regs)[2] = tswapreg(env->dregs[3]);
1272 (*regs)[3] = tswapreg(env->dregs[4]);
1273 (*regs)[4] = tswapreg(env->dregs[5]);
1274 (*regs)[5] = tswapreg(env->dregs[6]);
1275 (*regs)[6] = tswapreg(env->dregs[7]);
1276 (*regs)[7] = tswapreg(env->aregs[0]);
1277 (*regs)[8] = tswapreg(env->aregs[1]);
1278 (*regs)[9] = tswapreg(env->aregs[2]);
1279 (*regs)[10] = tswapreg(env->aregs[3]);
1280 (*regs)[11] = tswapreg(env->aregs[4]);
1281 (*regs)[12] = tswapreg(env->aregs[5]);
1282 (*regs)[13] = tswapreg(env->aregs[6]);
1283 (*regs)[14] = tswapreg(env->dregs[0]);
1284 (*regs)[15] = tswapreg(env->aregs[7]);
1285 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1286 (*regs)[17] = tswapreg(env->sr);
1287 (*regs)[18] = tswapreg(env->pc);
7a93cc55
NF		 1288 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1289}
1290
1291#define USE_ELF_CORE_DUMP
d97ef72e 1292#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 1293
1294#endif
1295
7a3148a9
JM		 1296#ifdef TARGET_ALPHA
1297
1298#define ELF_START_MMAP (0x30000000000ULL)
1299
7a3148a9 1300#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 1301#define ELF_ARCH EM_ALPHA
1302
d97ef72e
RH		 1303static inline void init_thread(struct target_pt_regs *regs,
1304 struct image_info *infop)
7a3148a9
JM		 1305{
1306 regs->pc = infop->entry;
1307 regs->ps = 8;
1308 regs->usp = infop->start_stack;
7a3148a9
JM		 1309}
1310
7a3148a9
JM		 1311#define ELF_EXEC_PAGESIZE 8192
1312
1313#endif /* TARGET_ALPHA */
1314
a4c075f1
UH		 1315#ifdef TARGET_S390X
1316
1317#define ELF_START_MMAP (0x20000000000ULL)
1318
a4c075f1
UH		 1319#define ELF_CLASS ELFCLASS64
1320#define ELF_DATA ELFDATA2MSB
1321#define ELF_ARCH EM_S390
1322
6d88baf1
DH		 1323#include "elf.h"
1324
1325#define ELF_HWCAP get_elf_hwcap()
1326
1327#define GET_FEATURE(_feat, _hwcap) \
1328 do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0)
1329
1330static uint32_t get_elf_hwcap(void)
1331{
1332 /*
1333 * Let's assume we always have esan3 and zarch.
1334 * 31-bit processes can use 64-bit registers (high gprs).
1335 */
1336 uint32_t hwcap = HWCAP_S390_ESAN3 | HWCAP_S390_ZARCH | HWCAP_S390_HIGH_GPRS;
1337
1338 GET_FEATURE(S390_FEAT_STFLE, HWCAP_S390_STFLE);
1339 GET_FEATURE(S390_FEAT_MSA, HWCAP_S390_MSA);
1340 GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT, HWCAP_S390_LDISP);
1341 GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE, HWCAP_S390_EIMM);
1342 if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3) &&
1343 s390_has_feat(S390_FEAT_ETF3_ENH)) {
1344 hwcap |= HWCAP_S390_ETF3EH;
1345 }
1346 GET_FEATURE(S390_FEAT_VECTOR, HWCAP_S390_VXRS);
1347
1348 return hwcap;
1349}
1350
a4c075f1
UH		 1351static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1352{
1353 regs->psw.addr = infop->entry;
1354 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1355 regs->gprs[15] = infop->start_stack;
1356}
1357
1358#endif /* TARGET_S390X */
1359
b16189b2
CG		 1360#ifdef TARGET_TILEGX
1361
1362/* 42 bits real used address, a half for user mode */
1363#define ELF_START_MMAP (0x00000020000000000ULL)
1364
1365#define elf_check_arch(x) ((x) == EM_TILEGX)
1366
1367#define ELF_CLASS ELFCLASS64
1368#define ELF_DATA ELFDATA2LSB
1369#define ELF_ARCH EM_TILEGX
1370
1371static inline void init_thread(struct target_pt_regs *regs,
1372 struct image_info *infop)
1373{
1374 regs->pc = infop->entry;
1375 regs->sp = infop->start_stack;
1376
1377}
1378
1379#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1380
1381#endif /* TARGET_TILEGX */
1382
47ae93cd
MC		 1383#ifdef TARGET_RISCV
1384
1385#define ELF_START_MMAP 0x80000000
1386#define ELF_ARCH EM_RISCV
1387
1388#ifdef TARGET_RISCV32
1389#define ELF_CLASS ELFCLASS32
1390#else
1391#define ELF_CLASS ELFCLASS64
1392#endif
1393
1394static inline void init_thread(struct target_pt_regs *regs,
1395 struct image_info *infop)
1396{
1397 regs->sepc = infop->entry;
1398 regs->sp = infop->start_stack;
1399}
1400
1401#define ELF_EXEC_PAGESIZE 4096
1402
1403#endif /* TARGET_RISCV */
1404
7c248bcd
RH		 1405#ifdef TARGET_HPPA
1406
1407#define ELF_START_MMAP 0x80000000
1408#define ELF_CLASS ELFCLASS32
1409#define ELF_ARCH EM_PARISC
1410#define ELF_PLATFORM "PARISC"
1411#define STACK_GROWS_DOWN 0
1412#define STACK_ALIGNMENT 64
1413
1414static inline void init_thread(struct target_pt_regs *regs,
1415 struct image_info *infop)
1416{
1417 regs->iaoq[0] = infop->entry;
1418 regs->iaoq[1] = infop->entry + 4;
1419 regs->gr[23] = 0;
1420 regs->gr[24] = infop->arg_start;
1421 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1422 /* The top-of-stack contains a linkage buffer. */
1423 regs->gr[30] = infop->start_stack + 64;
1424 regs->gr[31] = infop->entry;
1425}
1426
1427#endif /* TARGET_HPPA */
1428
ba7651fb
MF		 1429#ifdef TARGET_XTENSA
1430
1431#define ELF_START_MMAP 0x20000000
1432
1433#define ELF_CLASS ELFCLASS32
1434#define ELF_ARCH EM_XTENSA
1435
1436static inline void init_thread(struct target_pt_regs *regs,
1437 struct image_info *infop)
1438{
1439 regs->windowbase = 0;
1440 regs->windowstart = 1;
1441 regs->areg[1] = infop->start_stack;
1442 regs->pc = infop->entry;
1443}
1444
1445/* See linux kernel: arch/xtensa/include/asm/elf.h. */
1446#define ELF_NREG 128
1447typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1448
1449enum {
1450 TARGET_REG_PC,
1451 TARGET_REG_PS,
1452 TARGET_REG_LBEG,
1453 TARGET_REG_LEND,
1454 TARGET_REG_LCOUNT,
1455 TARGET_REG_SAR,
1456 TARGET_REG_WINDOWSTART,
1457 TARGET_REG_WINDOWBASE,
1458 TARGET_REG_THREADPTR,
1459 TARGET_REG_AR0 = 64,
1460};
1461
1462static void elf_core_copy_regs(target_elf_gregset_t *regs,
1463 const CPUXtensaState *env)
1464{
1465 unsigned i;
1466
1467 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1468 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1469 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1470 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1471 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1472 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1473 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1474 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1475 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1476 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1477 for (i = 0; i < env->config->nareg; ++i) {
1478 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1479 }
1480}
1481
1482#define USE_ELF_CORE_DUMP
1483#define ELF_EXEC_PAGESIZE 4096
1484
1485#endif /* TARGET_XTENSA */
1486
15338fd7
FB		 1487#ifndef ELF_PLATFORM
1488#define ELF_PLATFORM (NULL)
1489#endif
1490
75be901c
PC		 1491#ifndef ELF_MACHINE
1492#define ELF_MACHINE ELF_ARCH
1493#endif
1494
d276a604
PC		 1495#ifndef elf_check_arch
1496#define elf_check_arch(x) ((x) == ELF_ARCH)
1497#endif
1498
ace3d654
CMAB		 1499#ifndef elf_check_abi
1500#define elf_check_abi(x) (1)
1501#endif
1502
15338fd7
FB		 1503#ifndef ELF_HWCAP
1504#define ELF_HWCAP 0
1505#endif
1506
7c4ee5bc
RH		 1507#ifndef STACK_GROWS_DOWN
1508#define STACK_GROWS_DOWN 1
1509#endif
1510
1511#ifndef STACK_ALIGNMENT
1512#define STACK_ALIGNMENT 16
1513#endif
1514
992f48a0 1515#ifdef TARGET_ABI32
cb33da57 1516#undef ELF_CLASS
992f48a0 1517#define ELF_CLASS ELFCLASS32
cb33da57
BS		 1518#undef bswaptls
1519#define bswaptls(ptr) bswap32s(ptr)
1520#endif
1521
31e31b8a 1522#include "elf.h"
09bfb054 1523
09bfb054
FB		 1524struct exec
1525{
d97ef72e
RH		 1526 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1527 unsigned int a_text; /* length of text, in bytes */
1528 unsigned int a_data; /* length of data, in bytes */
1529 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1530 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1531 unsigned int a_entry; /* start address */
1532 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1533 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 1534};
1535
1536
1537#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1538#define OMAGIC 0407
1539#define NMAGIC 0410
1540#define ZMAGIC 0413
1541#define QMAGIC 0314
1542
31e31b8a 1543/* Necessary parameters */
94894ff2
SB		 1544#define TARGET_ELF_EXEC_PAGESIZE \
1545 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1546 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1547#define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
79cb1f1d
YK		 1548#define TARGET_ELF_PAGESTART(_v) ((_v) & \
1549 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
54936004 1550#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 1551
e0d1673d 1552#define DLINFO_ITEMS 16
31e31b8a 1553
09bfb054
FB		 1554static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1555{
d97ef72e 1556 memcpy(to, from, n);
09bfb054 1557}
d691f669 1558
31e31b8a 1559#ifdef BSWAP_NEEDED
92a31b1f 1560static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 1561{
d97ef72e
RH		 1562 bswap16s(&ehdr->e_type); /* Object file type */
1563 bswap16s(&ehdr->e_machine); /* Architecture */
1564 bswap32s(&ehdr->e_version); /* Object file version */
1565 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1566 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1567 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1568 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1569 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1570 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1571 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1572 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1573 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1574 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 1575}
1576
991f8f0c 1577static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 1578{
991f8f0c
RH		 1579 int i;
1580 for (i = 0; i < phnum; ++i, ++phdr) {
1581 bswap32s(&phdr->p_type); /* Segment type */
1582 bswap32s(&phdr->p_flags); /* Segment flags */
1583 bswaptls(&phdr->p_offset); /* Segment file offset */
1584 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1585 bswaptls(&phdr->p_paddr); /* Segment physical address */
1586 bswaptls(&phdr->p_filesz); /* Segment size in file */
1587 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1588 bswaptls(&phdr->p_align); /* Segment alignment */
1589 }
31e31b8a 1590}
689f936f 1591
991f8f0c 1592static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 1593{
991f8f0c
RH		 1594 int i;
1595 for (i = 0; i < shnum; ++i, ++shdr) {
1596 bswap32s(&shdr->sh_name);
1597 bswap32s(&shdr->sh_type);
1598 bswaptls(&shdr->sh_flags);
1599 bswaptls(&shdr->sh_addr);
1600 bswaptls(&shdr->sh_offset);
1601 bswaptls(&shdr->sh_size);
1602 bswap32s(&shdr->sh_link);
1603 bswap32s(&shdr->sh_info);
1604 bswaptls(&shdr->sh_addralign);
1605 bswaptls(&shdr->sh_entsize);
1606 }
689f936f
FB		 1607}
1608
7a3148a9 1609static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 1610{
1611 bswap32s(&sym->st_name);
7a3148a9
JM		 1612 bswaptls(&sym->st_value);
1613 bswaptls(&sym->st_size);
689f936f
FB		 1614 bswap16s(&sym->st_shndx);
1615}
5dd0db52
SM		 1616
1617#ifdef TARGET_MIPS
1618static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
1619{
1620 bswap16s(&abiflags->version);
1621 bswap32s(&abiflags->ases);
1622 bswap32s(&abiflags->isa_ext);
1623 bswap32s(&abiflags->flags1);
1624 bswap32s(&abiflags->flags2);
1625}
1626#endif
991f8f0c
RH		 1627#else
1628static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1629static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1630static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1631static inline void bswap_sym(struct elf_sym *sym) { }
5dd0db52
SM		 1632#ifdef TARGET_MIPS
1633static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { }
1634#endif
31e31b8a
FB		 1635#endif
1636
edf8e2af 1637#ifdef USE_ELF_CORE_DUMP
9349b4f9 1638static int elf_core_dump(int, const CPUArchState *);
edf8e2af 1639#endif /* USE_ELF_CORE_DUMP */
682674b8 1640static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 1641
9058abdd
RH		 1642/* Verify the portions of EHDR within E_IDENT for the target.
1643 This can be performed before bswapping the entire header. */
1644static bool elf_check_ident(struct elfhdr *ehdr)
1645{
1646 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1647 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1648 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1649 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1650 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1651 && ehdr->e_ident[EI_DATA] == ELF_DATA
1652 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1653}
1654
1655/* Verify the portions of EHDR outside of E_IDENT for the target.
1656 This has to wait until after bswapping the header. */
1657static bool elf_check_ehdr(struct elfhdr *ehdr)
1658{
1659 return (elf_check_arch(ehdr->e_machine)
ace3d654 1660 && elf_check_abi(ehdr->e_flags)
9058abdd
RH		 1661 && ehdr->e_ehsize == sizeof(struct elfhdr)
1662 && ehdr->e_phentsize == sizeof(struct elf_phdr)
9058abdd
RH		 1663 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1664}
1665
31e31b8a 1666/*
e5fe0c52 1667 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 1668 * memory to free pages in kernel mem. These are in a format ready
1669 * to be put directly into the top of new user memory.
1670 *
1671 */
59baae9a
SB		 1672static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1673 abi_ulong p, abi_ulong stack_limit)
31e31b8a 1674{
59baae9a 1675 char *tmp;
7c4ee5bc 1676 int len, i;
59baae9a 1677 abi_ulong top = p;
31e31b8a
FB		 1678
1679 if (!p) {
d97ef72e 1680 return 0; /* bullet-proofing */
31e31b8a 1681 }
59baae9a 1682
7c4ee5bc
RH		 1683 if (STACK_GROWS_DOWN) {
1684 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1685 for (i = argc - 1; i >= 0; --i) {
1686 tmp = argv[i];
1687 if (!tmp) {
1688 fprintf(stderr, "VFS: argc is wrong");
1689 exit(-1);
1690 }
1691 len = strlen(tmp) + 1;
1692 tmp += len;
59baae9a 1693
7c4ee5bc
RH		 1694 if (len > (p - stack_limit)) {
1695 return 0;
1696 }
1697 while (len) {
1698 int bytes_to_copy = (len > offset) ? offset : len;
1699 tmp -= bytes_to_copy;
1700 p -= bytes_to_copy;
1701 offset -= bytes_to_copy;
1702 len -= bytes_to_copy;
1703
1704 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1705
1706 if (offset == 0) {
1707 memcpy_to_target(p, scratch, top - p);
1708 top = p;
1709 offset = TARGET_PAGE_SIZE;
1710 }
1711 }
d97ef72e 1712 }
7c4ee5bc
RH		 1713 if (p != top) {
1714 memcpy_to_target(p, scratch + offset, top - p);
d97ef72e 1715 }
7c4ee5bc
RH		 1716 } else {
1717 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1718 for (i = 0; i < argc; ++i) {
1719 tmp = argv[i];
1720 if (!tmp) {
1721 fprintf(stderr, "VFS: argc is wrong");
1722 exit(-1);
1723 }
1724 len = strlen(tmp) + 1;
1725 if (len > (stack_limit - p)) {
1726 return 0;
1727 }
1728 while (len) {
1729 int bytes_to_copy = (len > remaining) ? remaining : len;
1730
1731 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1732
1733 tmp += bytes_to_copy;
1734 remaining -= bytes_to_copy;
1735 p += bytes_to_copy;
1736 len -= bytes_to_copy;
1737
1738 if (remaining == 0) {
1739 memcpy_to_target(top, scratch, p - top);
1740 top = p;
1741 remaining = TARGET_PAGE_SIZE;
1742 }
d97ef72e
RH		 1743 }
1744 }
7c4ee5bc
RH		 1745 if (p != top) {
1746 memcpy_to_target(top, scratch, p - top);
1747 }
59baae9a
SB		 1748 }
1749
31e31b8a
FB		 1750 return p;
1751}
1752
59baae9a
SB		 1753/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1754 * argument/environment space. Newer kernels (>2.6.33) allow more,
1755 * dependent on stack size, but guarantee at least 32 pages for
1756 * backwards compatibility.
1757 */
1758#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1759
1760static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
992f48a0 1761 struct image_info *info)
53a5960a 1762{
59baae9a 1763 abi_ulong size, error, guard;
31e31b8a 1764
703e0e89 1765 size = guest_stack_size;
59baae9a
SB		 1766 if (size < STACK_LOWER_LIMIT) {
1767 size = STACK_LOWER_LIMIT;
60dcbcb5
RH		 1768 }
1769 guard = TARGET_PAGE_SIZE;
1770 if (guard < qemu_real_host_page_size) {
1771 guard = qemu_real_host_page_size;
1772 }
1773
1774 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1775 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1776 if (error == -1) {
60dcbcb5 1777 perror("mmap stack");
09bfb054
FB		 1778 exit(-1);
1779 }
31e31b8a 1780
60dcbcb5 1781 /* We reserve one extra page at the top of the stack as guard. */
7c4ee5bc
RH		 1782 if (STACK_GROWS_DOWN) {
1783 target_mprotect(error, guard, PROT_NONE);
1784 info->stack_limit = error + guard;
1785 return info->stack_limit + size - sizeof(void *);
1786 } else {
1787 target_mprotect(error + size, guard, PROT_NONE);
1788 info->stack_limit = error + size;
1789 return error;
1790 }
31e31b8a
FB		 1791}
1792
cf129f3a
RH		 1793/* Map and zero the bss. We need to explicitly zero any fractional pages
1794 after the data section (i.e. bss). */
1795static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1796{
cf129f3a
RH		 1797 uintptr_t host_start, host_map_start, host_end;
1798
1799 last_bss = TARGET_PAGE_ALIGN(last_bss);
1800
1801 /* ??? There is confusion between qemu_real_host_page_size and
1802 qemu_host_page_size here and elsewhere in target_mmap, which
1803 may lead to the end of the data section mapping from the file
1804 not being mapped. At least there was an explicit test and
1805 comment for that here, suggesting that "the file size must
1806 be known". The comment probably pre-dates the introduction
1807 of the fstat system call in target_mmap which does in fact
1808 find out the size. What isn't clear is if the workaround
1809 here is still actually needed. For now, continue with it,
1810 but merge it with the "normal" mmap that would allocate the bss. */
1811
1812 host_start = (uintptr_t) g2h(elf_bss);
1813 host_end = (uintptr_t) g2h(last_bss);
0c2d70c4 1814 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
cf129f3a
RH		 1815
1816 if (host_map_start < host_end) {
1817 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1818 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1819 if (p == MAP_FAILED) {
1820 perror("cannot mmap brk");
1821 exit(-1);
853d6f7a 1822 }
f46e9a0b 1823 }
853d6f7a 1824
f46e9a0b
TM		 1825 /* Ensure that the bss page(s) are valid */
1826 if ((page_get_flags(last_bss-1) & prot) != prot) {
1827 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
cf129f3a 1828 }
31e31b8a 1829
cf129f3a
RH		 1830 if (host_start < host_map_start) {
1831 memset((void *)host_start, 0, host_map_start - host_start);
1832 }
1833}
53a5960a 1834
cf58affe
CL		 1835#ifdef TARGET_ARM
1836static int elf_is_fdpic(struct elfhdr *exec)
1837{
1838 return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC;
1839}
1840#else
a99856cd
CL		 1841/* Default implementation, always false. */
1842static int elf_is_fdpic(struct elfhdr *exec)
1843{
1844 return 0;
1845}
cf58affe 1846#endif
a99856cd 1847
1af02e83
MF		 1848static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1849{
1850 uint16_t n;
1851 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1852
1853 /* elf32_fdpic_loadseg */
1854 n = info->nsegs;
1855 while (n--) {
1856 sp -= 12;
1857 put_user_u32(loadsegs[n].addr, sp+0);
1858 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1859 put_user_u32(loadsegs[n].p_memsz, sp+8);
1860 }
1861
1862 /* elf32_fdpic_loadmap */
1863 sp -= 4;
1864 put_user_u16(0, sp+0); /* version */
1865 put_user_u16(info->nsegs, sp+2); /* nsegs */
1866
1867 info->personality = PER_LINUX_FDPIC;
1868 info->loadmap_addr = sp;
1869
1870 return sp;
1871}
1af02e83 1872
992f48a0 1873static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 1874 struct elfhdr *exec,
1875 struct image_info *info,
1876 struct image_info *interp_info)
31e31b8a 1877{
d97ef72e 1878 abi_ulong sp;
7c4ee5bc 1879 abi_ulong u_argc, u_argv, u_envp, u_auxv;
d97ef72e 1880 int size;
14322bad
LA		 1881 int i;
1882 abi_ulong u_rand_bytes;
1883 uint8_t k_rand_bytes[16];
d97ef72e
RH		 1884 abi_ulong u_platform;
1885 const char *k_platform;
1886 const int n = sizeof(elf_addr_t);
1887
1888 sp = p;
1af02e83 1889
1af02e83
MF		 1890 /* Needs to be before we load the env/argc/... */
1891 if (elf_is_fdpic(exec)) {
1892 /* Need 4 byte alignment for these structs */
1893 sp &= ~3;
1894 sp = loader_build_fdpic_loadmap(info, sp);
1895 info->other_info = interp_info;
1896 if (interp_info) {
1897 interp_info->other_info = info;
1898 sp = loader_build_fdpic_loadmap(interp_info, sp);
3cb10cfa
CL		 1899 info->interpreter_loadmap_addr = interp_info->loadmap_addr;
1900 info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr;
1901 } else {
1902 info->interpreter_loadmap_addr = 0;
1903 info->interpreter_pt_dynamic_addr = 0;
1af02e83
MF		 1904 }
1905 }
1af02e83 1906
d97ef72e
RH		 1907 u_platform = 0;
1908 k_platform = ELF_PLATFORM;
1909 if (k_platform) {
1910 size_t len = strlen(k_platform) + 1;
7c4ee5bc
RH		 1911 if (STACK_GROWS_DOWN) {
1912 sp -= (len + n - 1) & ~(n - 1);
1913 u_platform = sp;
1914 /* FIXME - check return value of memcpy_to_target() for failure */
1915 memcpy_to_target(sp, k_platform, len);
1916 } else {
1917 memcpy_to_target(sp, k_platform, len);
1918 u_platform = sp;
1919 sp += len + 1;
1920 }
1921 }
1922
1923 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1924 * the argv and envp pointers.
1925 */
1926 if (STACK_GROWS_DOWN) {
1927 sp = QEMU_ALIGN_DOWN(sp, 16);
1928 } else {
1929 sp = QEMU_ALIGN_UP(sp, 16);
d97ef72e 1930 }
14322bad
LA		 1931
1932 /*
c6a2377f 1933 * Generate 16 random bytes for userspace PRNG seeding.
14322bad 1934 */
c6a2377f 1935 qemu_guest_getrandom_nofail(k_rand_bytes, sizeof(k_rand_bytes));
7c4ee5bc
RH		 1936 if (STACK_GROWS_DOWN) {
1937 sp -= 16;
1938 u_rand_bytes = sp;
1939 /* FIXME - check return value of memcpy_to_target() for failure */
1940 memcpy_to_target(sp, k_rand_bytes, 16);
1941 } else {
1942 memcpy_to_target(sp, k_rand_bytes, 16);
1943 u_rand_bytes = sp;
1944 sp += 16;
1945 }
14322bad 1946
d97ef72e
RH		 1947 size = (DLINFO_ITEMS + 1) * 2;
1948 if (k_platform)
1949 size += 2;
f5155289 1950#ifdef DLINFO_ARCH_ITEMS
d97ef72e 1951 size += DLINFO_ARCH_ITEMS * 2;
ad6919dc
PM		 1952#endif
1953#ifdef ELF_HWCAP2
1954 size += 2;
f5155289 1955#endif
f516511e
PM		 1956 info->auxv_len = size * n;
1957
d97ef72e 1958 size += envc + argc + 2;
b9329d4b 1959 size += 1; /* argc itself */
d97ef72e 1960 size *= n;
7c4ee5bc
RH		 1961
1962 /* Allocate space and finalize stack alignment for entry now. */
1963 if (STACK_GROWS_DOWN) {
1964 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1965 sp = u_argc;
1966 } else {
1967 u_argc = sp;
1968 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1969 }
1970
1971 u_argv = u_argc + n;
1972 u_envp = u_argv + (argc + 1) * n;
1973 u_auxv = u_envp + (envc + 1) * n;
1974 info->saved_auxv = u_auxv;
1975 info->arg_start = u_argv;
1976 info->arg_end = u_argv + argc * n;
d97ef72e
RH		 1977
1978 /* This is correct because Linux defines
1979 * elf_addr_t as Elf32_Off / Elf64_Off
1980 */
1981#define NEW_AUX_ENT(id, val) do { \
7c4ee5bc
RH		 1982 put_user_ual(id, u_auxv); u_auxv += n; \
1983 put_user_ual(val, u_auxv); u_auxv += n; \
d97ef72e
RH		 1984 } while(0)
1985
82991bed
PM		 1986#ifdef ARCH_DLINFO
1987 /*
1988 * ARCH_DLINFO must come first so platform specific code can enforce
1989 * special alignment requirements on the AUXV if necessary (eg. PPC).
1990 */
1991 ARCH_DLINFO;
1992#endif
f516511e
PM		 1993 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1994 * on info->auxv_len will trigger.
1995 */
8e62a717 1996 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 1997 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1998 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
33143c44
LV		 1999 if ((info->alignment & ~qemu_host_page_mask) != 0) {
2000 /* Target doesn't support host page size alignment */
2001 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
2002 } else {
2003 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE,
2004 qemu_host_page_size)));
2005 }
8e62a717 2006 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 2007 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 2008 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 2009 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
2010 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
2011 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
2012 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
2013 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
2014 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
14322bad 2015 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
444cd5c3 2016 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
e0d1673d 2017 NEW_AUX_ENT(AT_EXECFN, info->file_string);
14322bad 2018
ad6919dc
PM		 2019#ifdef ELF_HWCAP2
2020 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
2021#endif
2022
7c4ee5bc 2023 if (u_platform) {
d97ef72e 2024 NEW_AUX_ENT(AT_PLATFORM, u_platform);
7c4ee5bc 2025 }
7c4ee5bc 2026 NEW_AUX_ENT (AT_NULL, 0);
f5155289
FB		 2027#undef NEW_AUX_ENT
2028
f516511e
PM		 2029 /* Check that our initial calculation of the auxv length matches how much
2030 * we actually put into it.
2031 */
2032 assert(info->auxv_len == u_auxv - info->saved_auxv);
7c4ee5bc
RH		 2033
2034 put_user_ual(argc, u_argc);
2035
2036 p = info->arg_strings;
2037 for (i = 0; i < argc; ++i) {
2038 put_user_ual(p, u_argv);
2039 u_argv += n;
2040 p += target_strlen(p) + 1;
2041 }
2042 put_user_ual(0, u_argv);
2043
2044 p = info->env_strings;
2045 for (i = 0; i < envc; ++i) {
2046 put_user_ual(p, u_envp);
2047 u_envp += n;
2048 p += target_strlen(p) + 1;
2049 }
2050 put_user_ual(0, u_envp);
edf8e2af 2051
d97ef72e 2052 return sp;
31e31b8a
FB		 2053}
2054
ee947430
AB		 2055#ifndef ARM_COMMPAGE
2056#define ARM_COMMPAGE 0
2057#define init_guest_commpage() true
8756e136 2058#endif
dce10401 2059
ee947430
AB		 2060static void pgb_fail_in_use(const char *image_name)
2061{
2062 error_report("%s: requires virtual address space that is in use "
2063 "(omit the -B option or choose a different value)",
2064 image_name);
2065 exit(EXIT_FAILURE);
2066}
dce10401 2067
ee947430
AB		 2068static void pgb_have_guest_base(const char *image_name, abi_ulong guest_loaddr,
2069 abi_ulong guest_hiaddr, long align)
2070{
2071 const int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
2072 void *addr, *test;
2a53535a 2073
ee947430
AB		 2074 if (!QEMU_IS_ALIGNED(guest_base, align)) {
2075 fprintf(stderr, "Requested guest base 0x%lx does not satisfy "
2076 "host minimum alignment (0x%lx)\n",
2077 guest_base, align);
2078 exit(EXIT_FAILURE);
2079 }
2080
2081 /* Sanity check the guest binary. */
2082 if (reserved_va) {
2083 if (guest_hiaddr > reserved_va) {
2084 error_report("%s: requires more than reserved virtual "
2085 "address space (0x%" PRIx64 " > 0x%lx)",
2086 image_name, (uint64_t)guest_hiaddr, reserved_va);
2087 exit(EXIT_FAILURE);
2a53535a 2088 }
ee947430 2089 } else {
a932eec4 2090#if HOST_LONG_BITS < TARGET_ABI_BITS
ee947430
AB		 2091 if ((guest_hiaddr - guest_base) > ~(uintptr_t)0) {
2092 error_report("%s: requires more virtual address space "
2093 "than the host can provide (0x%" PRIx64 ")",
2094 image_name, (uint64_t)guest_hiaddr - guest_base);
2095 exit(EXIT_FAILURE);
2a53535a 2096 }
a932eec4 2097#endif
2a53535a 2098 }
2a53535a 2099
ee947430
AB		 2100 /*
2101 * Expand the allocation to the entire reserved_va.
2102 * Exclude the mmap_min_addr hole.
2103 */
2104 if (reserved_va) {
2105 guest_loaddr = (guest_base >= mmap_min_addr ? 0
2106 : mmap_min_addr - guest_base);
2107 guest_hiaddr = reserved_va;
2108 }
806d1021 2109
ee947430
AB		 2110 /* Reserve the address space for the binary, or reserved_va. */
2111 test = g2h(guest_loaddr);
2112 addr = mmap(test, guest_hiaddr - guest_loaddr, PROT_NONE, flags, -1, 0);
2113 if (test != addr) {
2114 pgb_fail_in_use(image_name);
2115 }
2116}
2117
ad592e37
AB		 2118/**
2119 * pgd_find_hole_fallback: potential mmap address
2120 * @guest_size: size of available space
2121 * @brk: location of break
2122 * @align: memory alignment
2123 *
2124 * This is a fallback method for finding a hole in the host address
2125 * space if we don't have the benefit of being able to access
2126 * /proc/self/map. It can potentially take a very long time as we can
2127 * only dumbly iterate up the host address space seeing if the
2128 * allocation would work.
2129 */
5c3e87f3
AB		 2130static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size, uintptr_t brk,
2131 long align, uintptr_t offset)
ad592e37
AB		 2132{
2133 uintptr_t base;
2134
2135 /* Start (aligned) at the bottom and work our way up */
2136 base = ROUND_UP(mmap_min_addr, align);
2137
2138 while (true) {
2139 uintptr_t align_start, end;
2140 align_start = ROUND_UP(base, align);
5c3e87f3 2141 end = align_start + guest_size + offset;
ad592e37
AB		 2142
2143 /* if brk is anywhere in the range give ourselves some room to grow. */
2144 if (align_start <= brk && brk < end) {
2145 base = brk + (16 * MiB);
2146 continue;
2147 } else if (align_start + guest_size < align_start) {
2148 /* we have run out of space */
2149 return -1;
2150 } else {
2667e069
AB		 2151 int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE |
2152 MAP_FIXED_NOREPLACE;
ad592e37
AB		 2153 void * mmap_start = mmap((void *) align_start, guest_size,
2154 PROT_NONE, flags, -1, 0);
2155 if (mmap_start != MAP_FAILED) {
2156 munmap((void *) align_start, guest_size);
2667e069
AB		 2157 if (MAP_FIXED_NOREPLACE || mmap_start == (void *) align_start) {
2158 return (uintptr_t) mmap_start + offset;
2159 }
ad592e37
AB		 2160 }
2161 base += qemu_host_page_size;
2162 }
2163 }
2164}
2165
ee947430
AB		 2166/* Return value for guest_base, or -1 if no hole found. */
2167static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size,
5c3e87f3 2168 long align, uintptr_t offset)
ee947430
AB		 2169{
2170 GSList *maps, *iter;
2171 uintptr_t this_start, this_end, next_start, brk;
2172 intptr_t ret = -1;
2173
2174 assert(QEMU_IS_ALIGNED(guest_loaddr, align));
2175
2176 maps = read_self_maps();
dce10401 2177
ee947430
AB		 2178 /* Read brk after we've read the maps, which will malloc. */
2179 brk = (uintptr_t)sbrk(0);
2180
ad592e37 2181 if (!maps) {
5c3e87f3 2182 return pgd_find_hole_fallback(guest_size, brk, align, offset);
ad592e37
AB		 2183 }
2184
ee947430
AB		 2185 /* The first hole is before the first map entry. */
2186 this_start = mmap_min_addr;
2187
2188 for (iter = maps; iter;
2189 this_start = next_start, iter = g_slist_next(iter)) {
2190 uintptr_t align_start, hole_size;
2191
2192 this_end = ((MapInfo *)iter->data)->start;
2193 next_start = ((MapInfo *)iter->data)->end;
5c3e87f3 2194 align_start = ROUND_UP(this_start + offset, align);
ee947430
AB		 2195
2196 /* Skip holes that are too small. */
2197 if (align_start >= this_end) {
2198 continue;
2199 }
2200 hole_size = this_end - align_start;
2201 if (hole_size < guest_size) {
2202 continue;
aac362e4
LS		 2203 }
2204
ee947430
AB		 2205 /* If this hole contains brk, give ourselves some room to grow. */
2206 if (this_start <= brk && brk < this_end) {
2207 hole_size -= guest_size;
2208 if (sizeof(uintptr_t) == 8 && hole_size >= 1 * GiB) {
2209 align_start += 1 * GiB;
2210 } else if (hole_size >= 16 * MiB) {
2211 align_start += 16 * MiB;
2212 } else {
2213 align_start = (this_end - guest_size) & -align;
2214 if (align_start < this_start) {
2215 continue;
2216 }
806d1021 2217 }
806d1021
MI		 2218 }
2219
ee947430
AB		 2220 /* Record the lowest successful match. */
2221 if (ret < 0) {
2222 ret = align_start - guest_loaddr;
dce10401 2223 }
ee947430
AB		 2224 /* If this hole contains the identity map, select it. */
2225 if (align_start <= guest_loaddr &&
2226 guest_loaddr + guest_size <= this_end) {
2227 ret = 0;
b859040d 2228 }
ee947430
AB		 2229 /* If this hole ends above the identity map, stop looking. */
2230 if (this_end >= guest_loaddr) {
2231 break;
dce10401
MI		 2232 }
2233 }
ee947430 2234 free_self_maps(maps);
dce10401 2235
ee947430 2236 return ret;
dce10401
MI		 2237}
2238
ee947430
AB		 2239static void pgb_static(const char *image_name, abi_ulong orig_loaddr,
2240 abi_ulong orig_hiaddr, long align)
f3ed1f5d 2241{
ee947430
AB		 2242 uintptr_t loaddr = orig_loaddr;
2243 uintptr_t hiaddr = orig_hiaddr;
5c3e87f3 2244 uintptr_t offset = 0;
ee947430 2245 uintptr_t addr;
f3ed1f5d 2246
ee947430
AB		 2247 if (hiaddr != orig_hiaddr) {
2248 error_report("%s: requires virtual address space that the "
2249 "host cannot provide (0x%" PRIx64 ")",
2250 image_name, (uint64_t)orig_hiaddr);
2251 exit(EXIT_FAILURE);
2252 }
f3ed1f5d 2253
ee947430
AB		 2254 loaddr &= -align;
2255 if (ARM_COMMPAGE) {
2256 /*
2257 * Extend the allocation to include the commpage.
5c3e87f3
AB		 2258 * For a 64-bit host, this is just 4GiB; for a 32-bit host we
2259 * need to ensure there is space bellow the guest_base so we
2260 * can map the commpage in the place needed when the address
2261 * arithmetic wraps around.
ee947430
AB		 2262 */
2263 if (sizeof(uintptr_t) == 8 || loaddr >= 0x80000000u) {
5c3e87f3 2264 hiaddr = (uintptr_t) 4 << 30;
f3ed1f5d 2265 } else {
5c3e87f3 2266 offset = -(ARM_COMMPAGE & -align);
f3ed1f5d 2267 }
ee947430 2268 }
dce10401 2269
5c3e87f3 2270 addr = pgb_find_hole(loaddr, hiaddr - loaddr, align, offset);
ee947430
AB		 2271 if (addr == -1) {
2272 /*
2273 * If ARM_COMMPAGE, there *might* be a non-consecutive allocation
2274 * that can satisfy both. But as the normal arm32 link base address
2275 * is ~32k, and we extend down to include the commpage, making the
2276 * overhead only ~96k, this is unlikely.
dce10401 2277 */
ee947430
AB		 2278 error_report("%s: Unable to allocate %#zx bytes of "
2279 "virtual address space", image_name,
2280 (size_t)(hiaddr - loaddr));
2281 exit(EXIT_FAILURE);
2282 }
2283
2284 guest_base = addr;
2285}
dce10401 2286
ee947430
AB		 2287static void pgb_dynamic(const char *image_name, long align)
2288{
2289 /*
2290 * The executable is dynamic and does not require a fixed address.
2291 * All we need is a commpage that satisfies align.
2292 * If we do not need a commpage, leave guest_base == 0.
2293 */
2294 if (ARM_COMMPAGE) {
2295 uintptr_t addr, commpage;
2296
2297 /* 64-bit hosts should have used reserved_va. */
2298 assert(sizeof(uintptr_t) == 4);
2299
2300 /*
2301 * By putting the commpage at the first hole, that puts guest_base
2302 * just above that, and maximises the positive guest addresses.
2303 */
2304 commpage = ARM_COMMPAGE & -align;
5c3e87f3 2305 addr = pgb_find_hole(commpage, -commpage, align, 0);
ee947430
AB		 2306 assert(addr != -1);
2307 guest_base = addr;
2308 }
2309}
2310
2311static void pgb_reserved_va(const char *image_name, abi_ulong guest_loaddr,
2312 abi_ulong guest_hiaddr, long align)
2313{
c1f6ad79 2314 int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
ee947430
AB		 2315 void *addr, *test;
2316
2317 if (guest_hiaddr > reserved_va) {
2318 error_report("%s: requires more than reserved virtual "
2319 "address space (0x%" PRIx64 " > 0x%lx)",
2320 image_name, (uint64_t)guest_hiaddr, reserved_va);
2321 exit(EXIT_FAILURE);
f3ed1f5d 2322 }
f3ed1f5d 2323
ee947430
AB		 2324 /* Widen the "image" to the entire reserved address space. */
2325 pgb_static(image_name, 0, reserved_va, align);
2326
2667e069 2327 /* osdep.h defines this as 0 if it's missing */
c1f6ad79 2328 flags |= MAP_FIXED_NOREPLACE;
c1f6ad79 2329
ee947430
AB		 2330 /* Reserve the memory on the host. */
2331 assert(guest_base != 0);
2332 test = g2h(0);
2333 addr = mmap(test, reserved_va, PROT_NONE, flags, -1, 0);
2334 if (addr == MAP_FAILED) {
2335 error_report("Unable to reserve 0x%lx bytes of virtual address "
c1f6ad79 2336 "space (%s) for use as guest address space (check your "
ee947430 2337 "virtual memory ulimit setting or reserve less "
c1f6ad79 2338 "using -R option)", reserved_va, strerror(errno));
ee947430
AB		 2339 exit(EXIT_FAILURE);
2340 }
2341 assert(addr == test);
f3ed1f5d
PM		 2342}
2343
ee947430
AB		 2344void probe_guest_base(const char *image_name, abi_ulong guest_loaddr,
2345 abi_ulong guest_hiaddr)
2346{
2347 /* In order to use host shmat, we must be able to honor SHMLBA. */
2348 uintptr_t align = MAX(SHMLBA, qemu_host_page_size);
2349
2350 if (have_guest_base) {
2351 pgb_have_guest_base(image_name, guest_loaddr, guest_hiaddr, align);
2352 } else if (reserved_va) {
2353 pgb_reserved_va(image_name, guest_loaddr, guest_hiaddr, align);
2354 } else if (guest_loaddr) {
2355 pgb_static(image_name, guest_loaddr, guest_hiaddr, align);
2356 } else {
2357 pgb_dynamic(image_name, align);
2358 }
2359
2360 /* Reserve and initialize the commpage. */
2361 if (!init_guest_commpage()) {
2362 /*
2363 * With have_guest_base, the user has selected the address and
2364 * we are trying to work with that. Otherwise, we have selected
2365 * free space and init_guest_commpage must succeeded.
2366 */
2367 assert(have_guest_base);
2368 pgb_fail_in_use(image_name);
2369 }
2370
2371 assert(QEMU_IS_ALIGNED(guest_base, align));
2372 qemu_log_mask(CPU_LOG_PAGE, "Locating guest address space "
2373 "@ 0x%" PRIx64 "\n", (uint64_t)guest_base);
2374}
f3ed1f5d 2375
8e62a717 2376/* Load an ELF image into the address space.
31e31b8a 2377
8e62a717
RH		 2378 IMAGE_NAME is the filename of the image, to use in error messages.
2379 IMAGE_FD is the open file descriptor for the image.
2380
2381 BPRM_BUF is a copy of the beginning of the file; this of course
2382 contains the elf file header at offset 0. It is assumed that this
2383 buffer is sufficiently aligned to present no problems to the host
2384 in accessing data at aligned offsets within the buffer.
2385
2386 On return: INFO values will be filled in, as necessary or available. */
2387
2388static void load_elf_image(const char *image_name, int image_fd,
bf858897 2389 struct image_info *info, char **pinterp_name,
8e62a717 2390 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 2391{
8e62a717
RH		 2392 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2393 struct elf_phdr *phdr;
2394 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2395 int i, retval;
2396 const char *errmsg;
5fafdf24 2397
8e62a717
RH		 2398 /* First of all, some simple consistency checks */
2399 errmsg = "Invalid ELF image for this architecture";
2400 if (!elf_check_ident(ehdr)) {
2401 goto exit_errmsg;
2402 }
2403 bswap_ehdr(ehdr);
2404 if (!elf_check_ehdr(ehdr)) {
2405 goto exit_errmsg;
d97ef72e 2406 }
5fafdf24 2407
8e62a717
RH		 2408 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2409 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2410 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 2411 } else {
8e62a717
RH		 2412 phdr = (struct elf_phdr *) alloca(i);
2413 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 2414 if (retval != i) {
8e62a717 2415 goto exit_read;
9955ffac 2416 }
d97ef72e 2417 }
8e62a717 2418 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 2419
1af02e83
MF		 2420 info->nsegs = 0;
2421 info->pt_dynamic_addr = 0;
1af02e83 2422
98c1076c
AB		 2423 mmap_lock();
2424
682674b8
RH		 2425 /* Find the maximum size of the image and allocate an appropriate
2426 amount of memory to handle that. */
2427 loaddr = -1, hiaddr = 0;
33143c44 2428 info->alignment = 0;
8e62a717
RH		 2429 for (i = 0; i < ehdr->e_phnum; ++i) {
2430 if (phdr[i].p_type == PT_LOAD) {
a93934fe 2431 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
682674b8
RH		 2432 if (a < loaddr) {
2433 loaddr = a;
2434 }
ccf661f8 2435 a = phdr[i].p_vaddr + phdr[i].p_memsz;
682674b8
RH		 2436 if (a > hiaddr) {
2437 hiaddr = a;
2438 }
1af02e83 2439 ++info->nsegs;
33143c44 2440 info->alignment |= phdr[i].p_align;
682674b8
RH		 2441 }
2442 }
2443
6fd59449
RH		 2444 if (pinterp_name != NULL) {
2445 /*
2446 * This is the main executable.
2447 *
2448 * Reserve extra space for brk.
2449 * We hold on to this space while placing the interpreter
2450 * and the stack, lest they be placed immediately after
2451 * the data segment and block allocation from the brk.
2452 *
2453 * 16MB is chosen as "large enough" without being so large
2454 * as to allow the result to not fit with a 32-bit guest on
2455 * a 32-bit host.
2456 */
2457 info->reserve_brk = 16 * MiB;
2458 hiaddr += info->reserve_brk;
2459
2460 if (ehdr->e_type == ET_EXEC) {
2461 /*
2462 * Make sure that the low address does not conflict with
2463 * MMAP_MIN_ADDR or the QEMU application itself.
2464 */
2465 probe_guest_base(image_name, loaddr, hiaddr);
ee947430
AB		 2466 } else {
2467 /*
2468 * The binary is dynamic, but we still need to
2469 * select guest_base. In this case we pass a size.
2470 */
2471 probe_guest_base(image_name, 0, hiaddr - loaddr);
d97ef72e 2472 }
6fd59449
RH		 2473 }
2474
2475 /*
2476 * Reserve address space for all of this.
2477 *
2478 * In the case of ET_EXEC, we supply MAP_FIXED so that we get
2479 * exactly the address range that is required.
2480 *
2481 * Otherwise this is ET_DYN, and we are searching for a location
2482 * that can hold the memory space required. If the image is
2483 * pre-linked, LOADDR will be non-zero, and the kernel should
2484 * honor that address if it happens to be free.
2485 *
2486 * In both cases, we will overwrite pages in this range with mappings
2487 * from the executable.
2488 */
2489 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2490 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE |
2491 (ehdr->e_type == ET_EXEC ? MAP_FIXED : 0),
2492 -1, 0);
2493 if (load_addr == -1) {
2494 goto exit_perror;
d97ef72e 2495 }
682674b8 2496 load_bias = load_addr - loaddr;
d97ef72e 2497
a99856cd 2498 if (elf_is_fdpic(ehdr)) {
1af02e83 2499 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
7267c094 2500 g_malloc(sizeof(*loadsegs) * info->nsegs);
1af02e83
MF		 2501
2502 for (i = 0; i < ehdr->e_phnum; ++i) {
2503 switch (phdr[i].p_type) {
2504 case PT_DYNAMIC:
2505 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2506 break;
2507 case PT_LOAD:
2508 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2509 loadsegs->p_vaddr = phdr[i].p_vaddr;
2510 loadsegs->p_memsz = phdr[i].p_memsz;
2511 ++loadsegs;
2512 break;
2513 }
2514 }
2515 }
1af02e83 2516
8e62a717 2517 info->load_bias = load_bias;
dc12567a
JK		 2518 info->code_offset = load_bias;
2519 info->data_offset = load_bias;
8e62a717
RH		 2520 info->load_addr = load_addr;
2521 info->entry = ehdr->e_entry + load_bias;
2522 info->start_code = -1;
2523 info->end_code = 0;
2524 info->start_data = -1;
2525 info->end_data = 0;
2526 info->brk = 0;
d8fd2954 2527 info->elf_flags = ehdr->e_flags;
8e62a717
RH		 2528
2529 for (i = 0; i < ehdr->e_phnum; i++) {
2530 struct elf_phdr *eppnt = phdr + i;
d97ef72e 2531 if (eppnt->p_type == PT_LOAD) {
94894ff2 2532 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em, vaddr_len;
d97ef72e 2533 int elf_prot = 0;
d97ef72e
RH		 2534
2535 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2536 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2537 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
d97ef72e 2538
682674b8
RH		 2539 vaddr = load_bias + eppnt->p_vaddr;
2540 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2541 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
94894ff2 2542 vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
682674b8 2543
d87146bc
GM		 2544 /*
2545 * Some segments may be completely empty without any backing file
2546 * segment, in that case just let zero_bss allocate an empty buffer
2547 * for it.
2548 */
2549 if (eppnt->p_filesz != 0) {
2550 error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
2551 MAP_PRIVATE | MAP_FIXED,
2552 image_fd, eppnt->p_offset - vaddr_po);
2553
2554 if (error == -1) {
2555 goto exit_perror;
2556 }
09bfb054 2557 }
09bfb054 2558
682674b8
RH		 2559 vaddr_ef = vaddr + eppnt->p_filesz;
2560 vaddr_em = vaddr + eppnt->p_memsz;
31e31b8a 2561
cf129f3a 2562 /* If the load segment requests extra zeros (e.g. bss), map it. */
682674b8
RH		 2563 if (vaddr_ef < vaddr_em) {
2564 zero_bss(vaddr_ef, vaddr_em, elf_prot);
cf129f3a 2565 }
8e62a717
RH		 2566
2567 /* Find the full program boundaries. */
2568 if (elf_prot & PROT_EXEC) {
2569 if (vaddr < info->start_code) {
2570 info->start_code = vaddr;
2571 }
2572 if (vaddr_ef > info->end_code) {
2573 info->end_code = vaddr_ef;
2574 }
2575 }
2576 if (elf_prot & PROT_WRITE) {
2577 if (vaddr < info->start_data) {
2578 info->start_data = vaddr;
2579 }
2580 if (vaddr_ef > info->end_data) {
2581 info->end_data = vaddr_ef;
2582 }
8a045188
TB		 2583 }
2584 if (vaddr_em > info->brk) {
2585 info->brk = vaddr_em;
8e62a717 2586 }
bf858897
RH		 2587 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2588 char *interp_name;
2589
2590 if (*pinterp_name) {
2591 errmsg = "Multiple PT_INTERP entries";
2592 goto exit_errmsg;
2593 }
2594 interp_name = malloc(eppnt->p_filesz);
2595 if (!interp_name) {
2596 goto exit_perror;
2597 }
2598
2599 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2600 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2601 eppnt->p_filesz);
2602 } else {
2603 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2604 eppnt->p_offset);
2605 if (retval != eppnt->p_filesz) {
2606 goto exit_perror;
2607 }
2608 }
2609 if (interp_name[eppnt->p_filesz - 1] != 0) {
2610 errmsg = "Invalid PT_INTERP entry";
2611 goto exit_errmsg;
2612 }
2613 *pinterp_name = interp_name;
5dd0db52
SM		 2614#ifdef TARGET_MIPS
2615 } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) {
2616 Mips_elf_abiflags_v0 abiflags;
2617 if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) {
2618 errmsg = "Invalid PT_MIPS_ABIFLAGS entry";
2619 goto exit_errmsg;
2620 }
2621 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2622 memcpy(&abiflags, bprm_buf + eppnt->p_offset,
2623 sizeof(Mips_elf_abiflags_v0));
2624 } else {
2625 retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0),
2626 eppnt->p_offset);
2627 if (retval != sizeof(Mips_elf_abiflags_v0)) {
2628 goto exit_perror;
2629 }
2630 }
2631 bswap_mips_abiflags(&abiflags);
c94cb6c9 2632 info->fp_abi = abiflags.fp_abi;
5dd0db52 2633#endif
d97ef72e 2634 }
682674b8 2635 }
5fafdf24 2636
8e62a717
RH		 2637 if (info->end_data == 0) {
2638 info->start_data = info->end_code;
2639 info->end_data = info->end_code;
8e62a717
RH		 2640 }
2641
682674b8 2642 if (qemu_log_enabled()) {
8e62a717 2643 load_symbols(ehdr, image_fd, load_bias);
682674b8 2644 }
31e31b8a 2645
98c1076c
AB		 2646 mmap_unlock();
2647
8e62a717
RH		 2648 close(image_fd);
2649 return;
2650
2651 exit_read:
2652 if (retval >= 0) {
2653 errmsg = "Incomplete read of file header";
2654 goto exit_errmsg;
2655 }
2656 exit_perror:
2657 errmsg = strerror(errno);
2658 exit_errmsg:
2659 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2660 exit(-1);
2661}
2662
2663static void load_elf_interp(const char *filename, struct image_info *info,
2664 char bprm_buf[BPRM_BUF_SIZE])
2665{
2666 int fd, retval;
2667
2668 fd = open(path(filename), O_RDONLY);
2669 if (fd < 0) {
2670 goto exit_perror;
2671 }
31e31b8a 2672
8e62a717
RH		 2673 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2674 if (retval < 0) {
2675 goto exit_perror;
2676 }
2677 if (retval < BPRM_BUF_SIZE) {
2678 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2679 }
2680
bf858897 2681 load_elf_image(filename, fd, info, NULL, bprm_buf);
8e62a717
RH		 2682 return;
2683
2684 exit_perror:
2685 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2686 exit(-1);
31e31b8a
FB		 2687}
2688
49918a75
PB		 2689static int symfind(const void *s0, const void *s1)
2690{
c7c530cd 2691 target_ulong addr = *(target_ulong *)s0;
49918a75
PB		 2692 struct elf_sym *sym = (struct elf_sym *)s1;
2693 int result = 0;
c7c530cd 2694 if (addr < sym->st_value) {
49918a75 2695 result = -1;
c7c530cd 2696 } else if (addr >= sym->st_value + sym->st_size) {
49918a75
PB		 2697 result = 1;
2698 }
2699 return result;
2700}
2701
2702static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2703{
2704#if ELF_CLASS == ELFCLASS32
2705 struct elf_sym *syms = s->disas_symtab.elf32;
2706#else
2707 struct elf_sym *syms = s->disas_symtab.elf64;
2708#endif
2709
2710 // binary search
49918a75
PB		 2711 struct elf_sym *sym;
2712
c7c530cd 2713 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 2714 if (sym != NULL) {
49918a75
PB		 2715 return s->disas_strtab + sym->st_name;
2716 }
2717
2718 return "";
2719}
2720
2721/* FIXME: This should use elf_ops.h */
2722static int symcmp(const void *s0, const void *s1)
2723{
2724 struct elf_sym *sym0 = (struct elf_sym *)s0;
2725 struct elf_sym *sym1 = (struct elf_sym *)s1;
2726 return (sym0->st_value < sym1->st_value)
2727 ? -1
2728 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2729}
2730
689f936f 2731/* Best attempt to load symbols from this ELF object. */
682674b8 2732static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 2733{
682674b8 2734 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
1e06262d 2735 uint64_t segsz;
682674b8 2736 struct elf_shdr *shdr;
b9475279
CV		 2737 char *strings = NULL;
2738 struct syminfo *s = NULL;
2739 struct elf_sym *new_syms, *syms = NULL;
689f936f 2740
682674b8
RH		 2741 shnum = hdr->e_shnum;
2742 i = shnum * sizeof(struct elf_shdr);
2743 shdr = (struct elf_shdr *)alloca(i);
2744 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2745 return;
2746 }
2747
2748 bswap_shdr(shdr, shnum);
2749 for (i = 0; i < shnum; ++i) {
2750 if (shdr[i].sh_type == SHT_SYMTAB) {
2751 sym_idx = i;
2752 str_idx = shdr[i].sh_link;
49918a75
PB		 2753 goto found;
2754 }
689f936f 2755 }
682674b8
RH		 2756
2757 /* There will be no symbol table if the file was stripped. */
2758 return;
689f936f
FB		 2759
2760 found:
682674b8 2761 /* Now know where the strtab and symtab are. Snarf them. */
0ef9ea29 2762 s = g_try_new(struct syminfo, 1);
682674b8 2763 if (!s) {
b9475279 2764 goto give_up;
682674b8 2765 }
5fafdf24 2766
1e06262d
PM		 2767 segsz = shdr[str_idx].sh_size;
2768 s->disas_strtab = strings = g_try_malloc(segsz);
2769 if (!strings ||
2770 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
b9475279 2771 goto give_up;
682674b8 2772 }
49918a75 2773
1e06262d
PM		 2774 segsz = shdr[sym_idx].sh_size;
2775 syms = g_try_malloc(segsz);
2776 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
b9475279 2777 goto give_up;
682674b8 2778 }
31e31b8a 2779
1e06262d
PM		 2780 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2781 /* Implausibly large symbol table: give up rather than ploughing
2782 * on with the number of symbols calculation overflowing
2783 */
2784 goto give_up;
2785 }
2786 nsyms = segsz / sizeof(struct elf_sym);
682674b8 2787 for (i = 0; i < nsyms; ) {
49918a75 2788 bswap_sym(syms + i);
682674b8
RH		 2789 /* Throw away entries which we do not need. */
2790 if (syms[i].st_shndx == SHN_UNDEF
2791 || syms[i].st_shndx >= SHN_LORESERVE
2792 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2793 if (i < --nsyms) {
49918a75
PB		 2794 syms[i] = syms[nsyms];
2795 }
682674b8 2796 } else {
49918a75 2797#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 2798 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2799 syms[i].st_value &= ~(target_ulong)1;
0774bed1 2800#endif
682674b8
RH		 2801 syms[i].st_value += load_bias;
2802 i++;
2803 }
0774bed1 2804 }
49918a75 2805
b9475279
CV		 2806 /* No "useful" symbol. */
2807 if (nsyms == 0) {
2808 goto give_up;
2809 }
2810
5d5c9930
RH		 2811 /* Attempt to free the storage associated with the local symbols
2812 that we threw away. Whether or not this has any effect on the
2813 memory allocation depends on the malloc implementation and how
2814 many symbols we managed to discard. */
0ef9ea29 2815 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
8d79de6e 2816 if (new_syms == NULL) {
b9475279 2817 goto give_up;
5d5c9930 2818 }
8d79de6e 2819 syms = new_syms;
5d5c9930 2820
49918a75 2821 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 2822
49918a75
PB		 2823 s->disas_num_syms = nsyms;
2824#if ELF_CLASS == ELFCLASS32
2825 s->disas_symtab.elf32 = syms;
49918a75
PB		 2826#else
2827 s->disas_symtab.elf64 = syms;
49918a75 2828#endif
682674b8 2829 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 2830 s->next = syminfos;
2831 syminfos = s;
b9475279
CV		 2832
2833 return;
2834
2835give_up:
0ef9ea29
PM		 2836 g_free(s);
2837 g_free(strings);
2838 g_free(syms);
689f936f 2839}
31e31b8a 2840
768fe76e
YS		 2841uint32_t get_elf_eflags(int fd)
2842{
2843 struct elfhdr ehdr;
2844 off_t offset;
2845 int ret;
2846
2847 /* Read ELF header */
2848 offset = lseek(fd, 0, SEEK_SET);
2849 if (offset == (off_t) -1) {
2850 return 0;
2851 }
2852 ret = read(fd, &ehdr, sizeof(ehdr));
2853 if (ret < sizeof(ehdr)) {
2854 return 0;
2855 }
2856 offset = lseek(fd, offset, SEEK_SET);
2857 if (offset == (off_t) -1) {
2858 return 0;
2859 }
2860
2861 /* Check ELF signature */
2862 if (!elf_check_ident(&ehdr)) {
2863 return 0;
2864 }
2865
2866 /* check header */
2867 bswap_ehdr(&ehdr);
2868 if (!elf_check_ehdr(&ehdr)) {
2869 return 0;
2870 }
2871
2872 /* return architecture id */
2873 return ehdr.e_flags;
2874}
2875
f0116c54 2876int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
31e31b8a 2877{
8e62a717 2878 struct image_info interp_info;
31e31b8a 2879 struct elfhdr elf_ex;
8e62a717 2880 char *elf_interpreter = NULL;
59baae9a 2881 char *scratch;
31e31b8a 2882
abcac736
DS		 2883 memset(&interp_info, 0, sizeof(interp_info));
2884#ifdef TARGET_MIPS
2885 interp_info.fp_abi = MIPS_ABI_FP_UNKNOWN;
2886#endif
2887
bf858897 2888 info->start_mmap = (abi_ulong)ELF_START_MMAP;
bf858897
RH		 2889
2890 load_elf_image(bprm->filename, bprm->fd, info,
2891 &elf_interpreter, bprm->buf);
31e31b8a 2892
bf858897
RH		 2893 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2894 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2895 when we load the interpreter. */
2896 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 2897
59baae9a
SB		 2898 /* Do this so that we can load the interpreter, if need be. We will
2899 change some of these later */
2900 bprm->p = setup_arg_pages(bprm, info);
2901
2902 scratch = g_new0(char, TARGET_PAGE_SIZE);
7c4ee5bc
RH		 2903 if (STACK_GROWS_DOWN) {
2904 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2905 bprm->p, info->stack_limit);
2906 info->file_string = bprm->p;
2907 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2908 bprm->p, info->stack_limit);
2909 info->env_strings = bprm->p;
2910 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2911 bprm->p, info->stack_limit);
2912 info->arg_strings = bprm->p;
2913 } else {
2914 info->arg_strings = bprm->p;
2915 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2916 bprm->p, info->stack_limit);
2917 info->env_strings = bprm->p;
2918 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2919 bprm->p, info->stack_limit);
2920 info->file_string = bprm->p;
2921 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2922 bprm->p, info->stack_limit);
2923 }
2924
59baae9a
SB		 2925 g_free(scratch);
2926
e5fe0c52 2927 if (!bprm->p) {
bf858897
RH		 2928 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2929 exit(-1);
379f6698 2930 }
379f6698 2931
8e62a717
RH		 2932 if (elf_interpreter) {
2933 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 2934
8e62a717
RH		 2935 /* If the program interpreter is one of these two, then assume
2936 an iBCS2 image. Otherwise assume a native linux image. */
2937
2938 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2939 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2940 info->personality = PER_SVR4;
31e31b8a 2941
8e62a717
RH		 2942 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2943 and some applications "depend" upon this behavior. Since
2944 we do not have the power to recompile these, we emulate
2945 the SVr4 behavior. Sigh. */
2946 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
68754b44 2947 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
8e62a717 2948 }
c94cb6c9
SM		 2949#ifdef TARGET_MIPS
2950 info->interp_fp_abi = interp_info.fp_abi;
2951#endif
31e31b8a
FB		 2952 }
2953
8e62a717
RH		 2954 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2955 info, (elf_interpreter ? &interp_info : NULL));
2956 info->start_stack = bprm->p;
2957
2958 /* If we have an interpreter, set that as the program's entry point.
8e78064e 2959 Copy the load_bias as well, to help PPC64 interpret the entry
8e62a717
RH		 2960 point as a function descriptor. Do this after creating elf tables
2961 so that we copy the original program entry point into the AUXV. */
2962 if (elf_interpreter) {
8e78064e 2963 info->load_bias = interp_info.load_bias;
8e62a717 2964 info->entry = interp_info.entry;
bf858897 2965 free(elf_interpreter);
8e62a717 2966 }
31e31b8a 2967
edf8e2af
MW		 2968#ifdef USE_ELF_CORE_DUMP
2969 bprm->core_dump = &elf_core_dump;
2970#endif
2971
6fd59449
RH		 2972 /*
2973 * If we reserved extra space for brk, release it now.
2974 * The implementation of do_brk in syscalls.c expects to be able
2975 * to mmap pages in this space.
2976 */
2977 if (info->reserve_brk) {
2978 abi_ulong start_brk = HOST_PAGE_ALIGN(info->brk);
2979 abi_ulong end_brk = HOST_PAGE_ALIGN(info->brk + info->reserve_brk);
2980 target_munmap(start_brk, end_brk - start_brk);
2981 }
2982
31e31b8a
FB		 2983 return 0;
2984}
2985
edf8e2af 2986#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 2987/*
2988 * Definitions to generate Intel SVR4-like core files.
a2547a13 2989 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 2990 * tacked on the front to prevent clashes with linux definitions,
2991 * and the typedef forms have been avoided. This is mostly like
2992 * the SVR4 structure, but more Linuxy, with things that Linux does
2993 * not support and which gdb doesn't really use excluded.
2994 *
2995 * Fields we don't dump (their contents is zero) in linux-user qemu
2996 * are marked with XXX.
2997 *
2998 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2999 *
3000 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 3001 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 3002 * the target resides):
3003 *
3004 * #define USE_ELF_CORE_DUMP
3005 *
3006 * Next you define type of register set used for dumping. ELF specification
3007 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
3008 *
c227f099 3009 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 3010 * #define ELF_NREG <number of registers>
c227f099 3011 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 3012 *
edf8e2af
MW		 3013 * Last step is to implement target specific function that copies registers
3014 * from given cpu into just specified register set. Prototype is:
3015 *
c227f099 3016 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
9349b4f9 3017 * const CPUArchState *env);
edf8e2af
MW		 3018 *
3019 * Parameters:
3020 * regs - copy register values into here (allocated and zeroed by caller)
3021 * env - copy registers from here
3022 *
3023 * Example for ARM target is provided in this file.
3024 */
3025
3026/* An ELF note in memory */
3027struct memelfnote {
3028 const char *name;
3029 size_t namesz;
3030 size_t namesz_rounded;
3031 int type;
3032 size_t datasz;
80f5ce75 3033 size_t datasz_rounded;
edf8e2af
MW		 3034 void *data;
3035 size_t notesz;
3036};
3037
a2547a13 3038struct target_elf_siginfo {
f8fd4fc4
PB		 3039 abi_int si_signo; /* signal number */
3040 abi_int si_code; /* extra code */
3041 abi_int si_errno; /* errno */
edf8e2af
MW		 3042};
3043
a2547a13
LD		 3044struct target_elf_prstatus {
3045 struct target_elf_siginfo pr_info; /* Info associated with signal */
1ddd592f 3046 abi_short pr_cursig; /* Current signal */
ca98ac83
PB		 3047 abi_ulong pr_sigpend; /* XXX */
3048 abi_ulong pr_sighold; /* XXX */
c227f099
AL		 3049 target_pid_t pr_pid;
3050 target_pid_t pr_ppid;
3051 target_pid_t pr_pgrp;
3052 target_pid_t pr_sid;
edf8e2af
MW		 3053 struct target_timeval pr_utime; /* XXX User time */
3054 struct target_timeval pr_stime; /* XXX System time */
3055 struct target_timeval pr_cutime; /* XXX Cumulative user time */
3056 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 3057 target_elf_gregset_t pr_reg; /* GP registers */
f8fd4fc4 3058 abi_int pr_fpvalid; /* XXX */
edf8e2af
MW		 3059};
3060
3061#define ELF_PRARGSZ (80) /* Number of chars for args */
3062
a2547a13 3063struct target_elf_prpsinfo {
edf8e2af
MW		 3064 char pr_state; /* numeric process state */
3065 char pr_sname; /* char for pr_state */
3066 char pr_zomb; /* zombie */
3067 char pr_nice; /* nice val */
ca98ac83 3068 abi_ulong pr_flag; /* flags */
c227f099
AL		 3069 target_uid_t pr_uid;
3070 target_gid_t pr_gid;
3071 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af 3072 /* Lots missing */
d7eb2b92 3073 char pr_fname[16] QEMU_NONSTRING; /* filename of executable */
edf8e2af
MW		 3074 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
3075};
3076
3077/* Here is the structure in which status of each thread is captured. */
3078struct elf_thread_status {
72cf2d4f 3079 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 3080 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 3081#if 0
3082 elf_fpregset_t fpu; /* NT_PRFPREG */
3083 struct task_struct *thread;
3084 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
3085#endif
3086 struct memelfnote notes[1];
3087 int num_notes;
3088};
3089
3090struct elf_note_info {
3091 struct memelfnote *notes;
a2547a13
LD		 3092 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
3093 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 3094
b58deb34 3095 QTAILQ_HEAD(, elf_thread_status) thread_list;
edf8e2af
MW		 3096#if 0
3097 /*
3098 * Current version of ELF coredump doesn't support
3099 * dumping fp regs etc.
3100 */
3101 elf_fpregset_t *fpu;
3102 elf_fpxregset_t *xfpu;
3103 int thread_status_size;
3104#endif
3105 int notes_size;
3106 int numnote;
3107};
3108
3109struct vm_area_struct {
1a1c4db9
MI		 3110 target_ulong vma_start; /* start vaddr of memory region */
3111 target_ulong vma_end; /* end vaddr of memory region */
3112 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 3113 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 3114};
3115
3116struct mm_struct {
72cf2d4f 3117 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 3118 int mm_count; /* number of mappings */
3119};
3120
3121static struct mm_struct *vma_init(void);
3122static void vma_delete(struct mm_struct *);
1a1c4db9
MI		 3123static int vma_add_mapping(struct mm_struct *, target_ulong,
3124 target_ulong, abi_ulong);
edf8e2af
MW		 3125static int vma_get_mapping_count(const struct mm_struct *);
3126static struct vm_area_struct *vma_first(const struct mm_struct *);
3127static struct vm_area_struct *vma_next(struct vm_area_struct *);
3128static abi_ulong vma_dump_size(const struct vm_area_struct *);
1a1c4db9 3129static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 3130 unsigned long flags);
edf8e2af
MW		 3131
3132static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
3133static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 3134 unsigned int, void *);
a2547a13
LD		 3135static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
3136static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 3137static void fill_auxv_note(struct memelfnote *, const TaskState *);
3138static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
3139static size_t note_size(const struct memelfnote *);
3140static void free_note_info(struct elf_note_info *);
9349b4f9
AF		 3141static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
3142static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
edf8e2af
MW		 3143static int core_dump_filename(const TaskState *, char *, size_t);
3144
3145static int dump_write(int, const void *, size_t);
3146static int write_note(struct memelfnote *, int);
3147static int write_note_info(struct elf_note_info *, int);
3148
3149#ifdef BSWAP_NEEDED
a2547a13 3150static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af 3151{
ca98ac83
PB		 3152 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
3153 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
3154 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
edf8e2af 3155 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
ca98ac83
PB		 3156 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
3157 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
edf8e2af
MW		 3158 prstatus->pr_pid = tswap32(prstatus->pr_pid);
3159 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
3160 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
3161 prstatus->pr_sid = tswap32(prstatus->pr_sid);
3162 /* cpu times are not filled, so we skip them */
3163 /* regs should be in correct format already */
3164 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
3165}
3166
a2547a13 3167static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af 3168{
ca98ac83 3169 psinfo->pr_flag = tswapal(psinfo->pr_flag);
edf8e2af
MW		 3170 psinfo->pr_uid = tswap16(psinfo->pr_uid);
3171 psinfo->pr_gid = tswap16(psinfo->pr_gid);
3172 psinfo->pr_pid = tswap32(psinfo->pr_pid);
3173 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
3174 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
3175 psinfo->pr_sid = tswap32(psinfo->pr_sid);
3176}
991f8f0c
RH		 3177
3178static void bswap_note(struct elf_note *en)
3179{
3180 bswap32s(&en->n_namesz);
3181 bswap32s(&en->n_descsz);
3182 bswap32s(&en->n_type);
3183}
3184#else
3185static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
3186static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
3187static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 3188#endif /* BSWAP_NEEDED */
3189
3190/*
3191 * Minimal support for linux memory regions. These are needed
3192 * when we are finding out what memory exactly belongs to
3193 * emulated process. No locks needed here, as long as
3194 * thread that received the signal is stopped.
3195 */
3196
3197static struct mm_struct *vma_init(void)
3198{
3199 struct mm_struct *mm;
3200
7267c094 3201 if ((mm = g_malloc(sizeof (*mm))) == NULL)
edf8e2af
MW		 3202 return (NULL);
3203
3204 mm->mm_count = 0;
72cf2d4f 3205 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 3206
3207 return (mm);
3208}
3209
3210static void vma_delete(struct mm_struct *mm)
3211{
3212 struct vm_area_struct *vma;
3213
3214 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 3215 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
7267c094 3216 g_free(vma);
edf8e2af 3217 }
7267c094 3218 g_free(mm);
edf8e2af
MW		 3219}
3220
1a1c4db9
MI		 3221static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
3222 target_ulong end, abi_ulong flags)
edf8e2af
MW		 3223{
3224 struct vm_area_struct *vma;
3225
7267c094 3226 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
edf8e2af
MW		 3227 return (-1);
3228
3229 vma->vma_start = start;
3230 vma->vma_end = end;
3231 vma->vma_flags = flags;
3232
72cf2d4f 3233 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 3234 mm->mm_count++;
3235
3236 return (0);
3237}
3238
3239static struct vm_area_struct *vma_first(const struct mm_struct *mm)
3240{
72cf2d4f 3241 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 3242}
3243
3244static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
3245{
72cf2d4f 3246 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 3247}
3248
3249static int vma_get_mapping_count(const struct mm_struct *mm)
3250{
3251 return (mm->mm_count);
3252}
3253
3254/*
3255 * Calculate file (dump) size of given memory region.
3256 */
3257static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
3258{
3259 /* if we cannot even read the first page, skip it */
3260 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
3261 return (0);
3262
3263 /*
3264 * Usually we don't dump executable pages as they contain
3265 * non-writable code that debugger can read directly from
3266 * target library etc. However, thread stacks are marked
3267 * also executable so we read in first page of given region
3268 * and check whether it contains elf header. If there is
3269 * no elf header, we dump it.
3270 */
3271 if (vma->vma_flags & PROT_EXEC) {
3272 char page[TARGET_PAGE_SIZE];
3273
3274 copy_from_user(page, vma->vma_start, sizeof (page));
3275 if ((page[EI_MAG0] == ELFMAG0) &&
3276 (page[EI_MAG1] == ELFMAG1) &&
3277 (page[EI_MAG2] == ELFMAG2) &&
3278 (page[EI_MAG3] == ELFMAG3)) {
3279 /*
3280 * Mappings are possibly from ELF binary. Don't dump
3281 * them.
3282 */
3283 return (0);
3284 }
3285 }
3286
3287 return (vma->vma_end - vma->vma_start);
3288}
3289
1a1c4db9 3290static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 3291 unsigned long flags)
edf8e2af
MW		 3292{
3293 struct mm_struct *mm = (struct mm_struct *)priv;
3294
edf8e2af
MW		 3295 vma_add_mapping(mm, start, end, flags);
3296 return (0);
3297}
3298
3299static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 3300 unsigned int sz, void *data)
edf8e2af
MW		 3301{
3302 unsigned int namesz;
3303
3304 namesz = strlen(name) + 1;
3305 note->name = name;
3306 note->namesz = namesz;
3307 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
3308 note->type = type;
80f5ce75
LV		 3309 note->datasz = sz;
3310 note->datasz_rounded = roundup(sz, sizeof (int32_t));
3311
edf8e2af
MW		 3312 note->data = data;
3313
3314 /*
3315 * We calculate rounded up note size here as specified by
3316 * ELF document.
3317 */
3318 note->notesz = sizeof (struct elf_note) +
80f5ce75 3319 note->namesz_rounded + note->datasz_rounded;
edf8e2af
MW		 3320}
3321
3322static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 3323 uint32_t flags)
edf8e2af
MW		 3324{
3325 (void) memset(elf, 0, sizeof(*elf));
3326
3327 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
3328 elf->e_ident[EI_CLASS] = ELF_CLASS;
3329 elf->e_ident[EI_DATA] = ELF_DATA;
3330 elf->e_ident[EI_VERSION] = EV_CURRENT;
3331 elf->e_ident[EI_OSABI] = ELF_OSABI;
3332
3333 elf->e_type = ET_CORE;
3334 elf->e_machine = machine;
3335 elf->e_version = EV_CURRENT;
3336 elf->e_phoff = sizeof(struct elfhdr);
3337 elf->e_flags = flags;
3338 elf->e_ehsize = sizeof(struct elfhdr);
3339 elf->e_phentsize = sizeof(struct elf_phdr);
3340 elf->e_phnum = segs;
3341
edf8e2af 3342 bswap_ehdr(elf);
edf8e2af
MW		 3343}
3344
3345static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
3346{
3347 phdr->p_type = PT_NOTE;
3348 phdr->p_offset = offset;
3349 phdr->p_vaddr = 0;
3350 phdr->p_paddr = 0;
3351 phdr->p_filesz = sz;
3352 phdr->p_memsz = 0;
3353 phdr->p_flags = 0;
3354 phdr->p_align = 0;
3355
991f8f0c 3356 bswap_phdr(phdr, 1);
edf8e2af
MW		 3357}
3358
3359static size_t note_size(const struct memelfnote *note)
3360{
3361 return (note->notesz);
3362}
3363
a2547a13 3364static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 3365 const TaskState *ts, int signr)
edf8e2af
MW		 3366{
3367 (void) memset(prstatus, 0, sizeof (*prstatus));
3368 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3369 prstatus->pr_pid = ts->ts_tid;
3370 prstatus->pr_ppid = getppid();
3371 prstatus->pr_pgrp = getpgrp();
3372 prstatus->pr_sid = getsid(0);
3373
edf8e2af 3374 bswap_prstatus(prstatus);
edf8e2af
MW		 3375}
3376
a2547a13 3377static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af 3378{
900cfbca 3379 char *base_filename;
edf8e2af
MW		 3380 unsigned int i, len;
3381
3382 (void) memset(psinfo, 0, sizeof (*psinfo));
3383
3384 len = ts->info->arg_end - ts->info->arg_start;
3385 if (len >= ELF_PRARGSZ)
3386 len = ELF_PRARGSZ - 1;
3387 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
3388 return -EFAULT;
3389 for (i = 0; i < len; i++)
3390 if (psinfo->pr_psargs[i] == 0)
3391 psinfo->pr_psargs[i] = ' ';
3392 psinfo->pr_psargs[len] = 0;
3393
3394 psinfo->pr_pid = getpid();
3395 psinfo->pr_ppid = getppid();
3396 psinfo->pr_pgrp = getpgrp();
3397 psinfo->pr_sid = getsid(0);
3398 psinfo->pr_uid = getuid();
3399 psinfo->pr_gid = getgid();
3400
900cfbca
JM		 3401 base_filename = g_path_get_basename(ts->bprm->filename);
3402 /*
3403 * Using strncpy here is fine: at max-length,
3404 * this field is not NUL-terminated.
3405 */
edf8e2af 3406 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 3407 sizeof(psinfo->pr_fname));
edf8e2af 3408
900cfbca 3409 g_free(base_filename);
edf8e2af 3410 bswap_psinfo(psinfo);
edf8e2af
MW		 3411 return (0);
3412}
3413
3414static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3415{
3416 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3417 elf_addr_t orig_auxv = auxv;
edf8e2af 3418 void *ptr;
125b0f55 3419 int len = ts->info->auxv_len;
edf8e2af
MW		 3420
3421 /*
3422 * Auxiliary vector is stored in target process stack. It contains
3423 * {type, value} pairs that we need to dump into note. This is not
3424 * strictly necessary but we do it here for sake of completeness.
3425 */
3426
edf8e2af
MW		 3427 /* read in whole auxv vector and copy it to memelfnote */
3428 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3429 if (ptr != NULL) {
3430 fill_note(note, "CORE", NT_AUXV, len, ptr);
3431 unlock_user(ptr, auxv, len);
3432 }
3433}
3434
3435/*
3436 * Constructs name of coredump file. We have following convention
3437 * for the name:
3438 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3439 *
3440 * Returns 0 in case of success, -1 otherwise (errno is set).
3441 */
3442static int core_dump_filename(const TaskState *ts, char *buf,
d97ef72e 3443 size_t bufsize)
edf8e2af
MW		 3444{
3445 char timestamp[64];
edf8e2af
MW		 3446 char *base_filename = NULL;
3447 struct timeval tv;
3448 struct tm tm;
3449
3450 assert(bufsize >= PATH_MAX);
3451
3452 if (gettimeofday(&tv, NULL) < 0) {
3453 (void) fprintf(stderr, "unable to get current timestamp: %s",
d97ef72e 3454 strerror(errno));
edf8e2af
MW		 3455 return (-1);
3456 }
3457
b8da57fa 3458 base_filename = g_path_get_basename(ts->bprm->filename);
edf8e2af 3459 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
d97ef72e 3460 localtime_r(&tv.tv_sec, &tm));
edf8e2af 3461 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
d97ef72e 3462 base_filename, timestamp, (int)getpid());
b8da57fa 3463 g_free(base_filename);
edf8e2af
MW		 3464
3465 return (0);
3466}
3467
3468static int dump_write(int fd, const void *ptr, size_t size)
3469{
3470 const char *bufp = (const char *)ptr;
3471 ssize_t bytes_written, bytes_left;
3472 struct rlimit dumpsize;
3473 off_t pos;
3474
3475 bytes_written = 0;
3476 getrlimit(RLIMIT_CORE, &dumpsize);
3477 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3478 if (errno == ESPIPE) { /* not a seekable stream */
3479 bytes_left = size;
3480 } else {
3481 return pos;
3482 }
3483 } else {
3484 if (dumpsize.rlim_cur <= pos) {
3485 return -1;
3486 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3487 bytes_left = size;
3488 } else {
3489 size_t limit_left=dumpsize.rlim_cur - pos;
3490 bytes_left = limit_left >= size ? size : limit_left ;
3491 }
3492 }
3493
3494 /*
3495 * In normal conditions, single write(2) should do but
3496 * in case of socket etc. this mechanism is more portable.
3497 */
3498 do {
3499 bytes_written = write(fd, bufp, bytes_left);
3500 if (bytes_written < 0) {
3501 if (errno == EINTR)
3502 continue;
3503 return (-1);
3504 } else if (bytes_written == 0) { /* eof */
3505 return (-1);
3506 }
3507 bufp += bytes_written;
3508 bytes_left -= bytes_written;
3509 } while (bytes_left > 0);
3510
3511 return (0);
3512}
3513
3514static int write_note(struct memelfnote *men, int fd)
3515{
3516 struct elf_note en;
3517
3518 en.n_namesz = men->namesz;
3519 en.n_type = men->type;
3520 en.n_descsz = men->datasz;
3521
edf8e2af 3522 bswap_note(&en);
edf8e2af
MW		 3523
3524 if (dump_write(fd, &en, sizeof(en)) != 0)
3525 return (-1);
3526 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3527 return (-1);
80f5ce75 3528 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
edf8e2af
MW		 3529 return (-1);
3530
3531 return (0);
3532}
3533
9349b4f9 3534static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
edf8e2af 3535{
29a0af61 3536 CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 3537 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3538 struct elf_thread_status *ets;
3539
7267c094 3540 ets = g_malloc0(sizeof (*ets));
edf8e2af
MW		 3541 ets->num_notes = 1; /* only prstatus is dumped */
3542 fill_prstatus(&ets->prstatus, ts, 0);
3543 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3544 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 3545 &ets->prstatus);
edf8e2af 3546
72cf2d4f 3547 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 3548
3549 info->notes_size += note_size(&ets->notes[0]);
3550}
3551
6afafa86
PM		 3552static void init_note_info(struct elf_note_info *info)
3553{
3554 /* Initialize the elf_note_info structure so that it is at
3555 * least safe to call free_note_info() on it. Must be
3556 * called before calling fill_note_info().
3557 */
3558 memset(info, 0, sizeof (*info));
3559 QTAILQ_INIT(&info->thread_list);
3560}
3561
edf8e2af 3562static int fill_note_info(struct elf_note_info *info,
9349b4f9 3563 long signr, const CPUArchState *env)
edf8e2af
MW		 3564{
3565#define NUMNOTES 3
29a0af61 3566 CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 3567 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3568 int i;
3569
c78d65e8 3570 info->notes = g_new0(struct memelfnote, NUMNOTES);
edf8e2af
MW		 3571 if (info->notes == NULL)
3572 return (-ENOMEM);
7267c094 3573 info->prstatus = g_malloc0(sizeof (*info->prstatus));
edf8e2af
MW		 3574 if (info->prstatus == NULL)
3575 return (-ENOMEM);
7267c094 3576 info->psinfo = g_malloc0(sizeof (*info->psinfo));
edf8e2af
MW		 3577 if (info->prstatus == NULL)
3578 return (-ENOMEM);
3579
3580 /*
3581 * First fill in status (and registers) of current thread
3582 * including process info & aux vector.
3583 */
3584 fill_prstatus(info->prstatus, ts, signr);
3585 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3586 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 3587 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 3588 fill_psinfo(info->psinfo, ts);
3589 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 3590 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 3591 fill_auxv_note(&info->notes[2], ts);
3592 info->numnote = 3;
3593
3594 info->notes_size = 0;
3595 for (i = 0; i < info->numnote; i++)
3596 info->notes_size += note_size(&info->notes[i]);
3597
3598 /* read and fill status of all threads */
3599 cpu_list_lock();
bdc44640 3600 CPU_FOREACH(cpu) {
a2247f8e 3601 if (cpu == thread_cpu) {
edf8e2af 3602 continue;
182735ef
AF		 3603 }
3604 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
edf8e2af
MW		 3605 }
3606 cpu_list_unlock();
3607
3608 return (0);
3609}
3610
3611static void free_note_info(struct elf_note_info *info)
3612{
3613 struct elf_thread_status *ets;
3614
72cf2d4f
BS		 3615 while (!QTAILQ_EMPTY(&info->thread_list)) {
3616 ets = QTAILQ_FIRST(&info->thread_list);
3617 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
7267c094 3618 g_free(ets);
edf8e2af
MW		 3619 }
3620
7267c094
AL		 3621 g_free(info->prstatus);
3622 g_free(info->psinfo);
3623 g_free(info->notes);
edf8e2af
MW		 3624}
3625
3626static int write_note_info(struct elf_note_info *info, int fd)
3627{
3628 struct elf_thread_status *ets;
3629 int i, error = 0;
3630
3631 /* write prstatus, psinfo and auxv for current thread */
3632 for (i = 0; i < info->numnote; i++)
3633 if ((error = write_note(&info->notes[i], fd)) != 0)
3634 return (error);
3635
3636 /* write prstatus for each thread */
52a53afe 3637 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
edf8e2af
MW		 3638 if ((error = write_note(&ets->notes[0], fd)) != 0)
3639 return (error);
3640 }
3641
3642 return (0);
3643}
3644
3645/*
3646 * Write out ELF coredump.
3647 *
3648 * See documentation of ELF object file format in:
3649 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3650 *
3651 * Coredump format in linux is following:
3652 *
3653 * 0 +----------------------+ \
3654 * | ELF header | ET_CORE |
3655 * +----------------------+ |
3656 * | ELF program headers | |--- headers
3657 * | - NOTE section | |
3658 * | - PT_LOAD sections | |
3659 * +----------------------+ /
3660 * | NOTEs: |
3661 * | - NT_PRSTATUS |
3662 * | - NT_PRSINFO |
3663 * | - NT_AUXV |
3664 * +----------------------+ <-- aligned to target page
3665 * | Process memory dump |
3666 * : :
3667 * . .
3668 * : :
3669 * | |
3670 * +----------------------+
3671 *
3672 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3673 * NT_PRSINFO -> struct elf_prpsinfo
3674 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3675 *
3676 * Format follows System V format as close as possible. Current
3677 * version limitations are as follows:
3678 * - no floating point registers are dumped
3679 *
3680 * Function returns 0 in case of success, negative errno otherwise.
3681 *
3682 * TODO: make this work also during runtime: it should be
3683 * possible to force coredump from running process and then
3684 * continue processing. For example qemu could set up SIGUSR2
3685 * handler (provided that target process haven't registered
3686 * handler for that) that does the dump when signal is received.
3687 */
9349b4f9 3688static int elf_core_dump(int signr, const CPUArchState *env)
edf8e2af 3689{
29a0af61 3690 const CPUState *cpu = env_cpu((CPUArchState *)env);
0429a971 3691 const TaskState *ts = (const TaskState *)cpu->opaque;
edf8e2af
MW		 3692 struct vm_area_struct *vma = NULL;
3693 char corefile[PATH_MAX];
3694 struct elf_note_info info;
3695 struct elfhdr elf;
3696 struct elf_phdr phdr;
3697 struct rlimit dumpsize;
3698 struct mm_struct *mm = NULL;
3699 off_t offset = 0, data_offset = 0;
3700 int segs = 0;
3701 int fd = -1;
3702
6afafa86
PM		 3703 init_note_info(&info);
3704
edf8e2af
MW		 3705 errno = 0;
3706 getrlimit(RLIMIT_CORE, &dumpsize);
3707 if (dumpsize.rlim_cur == 0)
d97ef72e 3708 return 0;
edf8e2af
MW		 3709
3710 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3711 return (-errno);
3712
3713 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 3714 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 3715 return (-errno);
3716
3717 /*
3718 * Walk through target process memory mappings and
3719 * set up structure containing this information. After
3720 * this point vma_xxx functions can be used.
3721 */
3722 if ((mm = vma_init()) == NULL)
3723 goto out;
3724
3725 walk_memory_regions(mm, vma_walker);
3726 segs = vma_get_mapping_count(mm);
3727
3728 /*
3729 * Construct valid coredump ELF header. We also
3730 * add one more segment for notes.
3731 */
3732 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3733 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3734 goto out;
3735
b6af0975 3736 /* fill in the in-memory version of notes */
edf8e2af
MW		 3737 if (fill_note_info(&info, signr, env) < 0)
3738 goto out;
3739
3740 offset += sizeof (elf); /* elf header */
3741 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3742
3743 /* write out notes program header */
3744 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3745
3746 offset += info.notes_size;
3747 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3748 goto out;
3749
3750 /*
3751 * ELF specification wants data to start at page boundary so
3752 * we align it here.
3753 */
80f5ce75 3754 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
edf8e2af
MW		 3755
3756 /*
3757 * Write program headers for memory regions mapped in
3758 * the target process.
3759 */
3760 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3761 (void) memset(&phdr, 0, sizeof (phdr));
3762
3763 phdr.p_type = PT_LOAD;
3764 phdr.p_offset = offset;
3765 phdr.p_vaddr = vma->vma_start;
3766 phdr.p_paddr = 0;
3767 phdr.p_filesz = vma_dump_size(vma);
3768 offset += phdr.p_filesz;
3769 phdr.p_memsz = vma->vma_end - vma->vma_start;
3770 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3771 if (vma->vma_flags & PROT_WRITE)
3772 phdr.p_flags |= PF_W;
3773 if (vma->vma_flags & PROT_EXEC)
3774 phdr.p_flags |= PF_X;
3775 phdr.p_align = ELF_EXEC_PAGESIZE;
3776
80f5ce75 3777 bswap_phdr(&phdr, 1);
772034b6
PM		 3778 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3779 goto out;
3780 }
edf8e2af
MW		 3781 }
3782
3783 /*
3784 * Next we write notes just after program headers. No
3785 * alignment needed here.
3786 */
3787 if (write_note_info(&info, fd) < 0)
3788 goto out;
3789
3790 /* align data to page boundary */
edf8e2af
MW		 3791 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3792 goto out;
3793
3794 /*
3795 * Finally we can dump process memory into corefile as well.
3796 */
3797 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3798 abi_ulong addr;
3799 abi_ulong end;
3800
3801 end = vma->vma_start + vma_dump_size(vma);
3802
3803 for (addr = vma->vma_start; addr < end;
d97ef72e 3804 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 3805 char page[TARGET_PAGE_SIZE];
3806 int error;
3807
3808 /*
3809 * Read in page from target process memory and
3810 * write it to coredump file.
3811 */
3812 error = copy_from_user(page, addr, sizeof (page));
3813 if (error != 0) {
49995e17 3814 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 3815 addr);
edf8e2af
MW		 3816 errno = -error;
3817 goto out;
3818 }
3819 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3820 goto out;
3821 }
3822 }
3823
d97ef72e 3824 out:
edf8e2af
MW		 3825 free_note_info(&info);
3826 if (mm != NULL)
3827 vma_delete(mm);
3828 (void) close(fd);
3829
3830 if (errno != 0)
3831 return (-errno);
3832 return (0);
3833}
edf8e2af
MW		 3834#endif /* USE_ELF_CORE_DUMP */
3835
e5fe0c52
PB		 3836void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3837{
3838 init_thread(regs, infop);
3839}
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