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linux-user: Add support for SIOC<G|S>IFPFLAGS ioctls for all targets
[thirdparty/qemu.git] / linux-user / elfload.c
CommitLineData
31e31b8a 1/* This is the Linux kernel elf-loading code, ported into user space */
d39594e9 2#include "qemu/osdep.h"
edf8e2af 3#include <sys/param.h>
31e31b8a 4
edf8e2af 5#include <sys/resource.h>
31e31b8a 6
3ef693a0 7#include "qemu.h"
76cad711 8#include "disas/disas.h"
f348b6d1 9#include "qemu/path.h"
31e31b8a 10
e58ffeb3 11#ifdef _ARCH_PPC64
a6cc84f4 12#undef ARCH_DLINFO
13#undef ELF_PLATFORM
14#undef ELF_HWCAP
ad6919dc 15#undef ELF_HWCAP2
a6cc84f4 16#undef ELF_CLASS
17#undef ELF_DATA
18#undef ELF_ARCH
19#endif
20
edf8e2af
MW		 21#define ELF_OSABI ELFOSABI_SYSV
22
cb33da57
BS		 23/* from personality.h */
24
25/*
26 * Flags for bug emulation.
27 *
28 * These occupy the top three bytes.
29 */
30enum {
d97ef72e
RH		 31 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
32 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
33 descriptors (signal handling) */
34 MMAP_PAGE_ZERO = 0x0100000,
35 ADDR_COMPAT_LAYOUT = 0x0200000,
36 READ_IMPLIES_EXEC = 0x0400000,
37 ADDR_LIMIT_32BIT = 0x0800000,
38 SHORT_INODE = 0x1000000,
39 WHOLE_SECONDS = 0x2000000,
40 STICKY_TIMEOUTS = 0x4000000,
41 ADDR_LIMIT_3GB = 0x8000000,
cb33da57
BS		 42};
43
44/*
45 * Personality types.
46 *
47 * These go in the low byte. Avoid using the top bit, it will
48 * conflict with error returns.
49 */
50enum {
d97ef72e
RH		 51 PER_LINUX = 0x0000,
52 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
53 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
54 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
55 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
56 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
57 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
58 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
59 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
60 PER_BSD = 0x0006,
61 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
62 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_LINUX32 = 0x0008,
64 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
65 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
66 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
67 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
68 PER_RISCOS = 0x000c,
69 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
70 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
71 PER_OSF4 = 0x000f, /* OSF/1 v4 */
72 PER_HPUX = 0x0010,
73 PER_MASK = 0x00ff,
cb33da57
BS		 74};
75
76/*
77 * Return the base personality without flags.
78 */
d97ef72e 79#define personality(pers) (pers & PER_MASK)
cb33da57 80
3cb10cfa
CL		 81int info_is_fdpic(struct image_info *info)
82{
83 return info->personality == PER_LINUX_FDPIC;
84}
85
83fb7adf
FB		 86/* this flag is uneffective under linux too, should be deleted */
87#ifndef MAP_DENYWRITE
88#define MAP_DENYWRITE 0
89#endif
90
91/* should probably go in elf.h */
92#ifndef ELIBBAD
93#define ELIBBAD 80
94#endif
95
28490231
RH		 96#ifdef TARGET_WORDS_BIGENDIAN
97#define ELF_DATA ELFDATA2MSB
98#else
99#define ELF_DATA ELFDATA2LSB
100#endif
101
a29f998d 102#ifdef TARGET_ABI_MIPSN32
918fc54c
PB		 103typedef abi_ullong target_elf_greg_t;
104#define tswapreg(ptr) tswap64(ptr)
a29f998d
PB		 105#else
106typedef abi_ulong target_elf_greg_t;
107#define tswapreg(ptr) tswapal(ptr)
108#endif
109
21e807fa 110#ifdef USE_UID16
1ddd592f
PB		 111typedef abi_ushort target_uid_t;
112typedef abi_ushort target_gid_t;
21e807fa 113#else
f8fd4fc4
PB		 114typedef abi_uint target_uid_t;
115typedef abi_uint target_gid_t;
21e807fa 116#endif
f8fd4fc4 117typedef abi_int target_pid_t;
21e807fa 118
30ac07d4
FB		 119#ifdef TARGET_I386
120
15338fd7
FB		 121#define ELF_PLATFORM get_elf_platform()
122
123static const char *get_elf_platform(void)
124{
125 static char elf_platform[] = "i386";
a2247f8e 126 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
15338fd7
FB		 127 if (family > 6)
128 family = 6;
129 if (family >= 3)
130 elf_platform[1] = '0' + family;
131 return elf_platform;
132}
133
134#define ELF_HWCAP get_elf_hwcap()
135
136static uint32_t get_elf_hwcap(void)
137{
a2247f8e
AF		 138 X86CPU *cpu = X86_CPU(thread_cpu);
139
140 return cpu->env.features[FEAT_1_EDX];
15338fd7
FB		 141}
142
84409ddb
JM		 143#ifdef TARGET_X86_64
144#define ELF_START_MMAP 0x2aaaaab000ULL
84409ddb
JM		 145
146#define ELF_CLASS ELFCLASS64
84409ddb
JM		 147#define ELF_ARCH EM_X86_64
148
149static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
150{
151 regs->rax = 0;
152 regs->rsp = infop->start_stack;
153 regs->rip = infop->entry;
154}
155
9edc5d79 156#define ELF_NREG 27
c227f099 157typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 158
159/*
160 * Note that ELF_NREG should be 29 as there should be place for
161 * TRAPNO and ERR "registers" as well but linux doesn't dump
162 * those.
163 *
164 * See linux kernel: arch/x86/include/asm/elf.h
165 */
05390248 166static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 167{
168 (*regs)[0] = env->regs[15];
169 (*regs)[1] = env->regs[14];
170 (*regs)[2] = env->regs[13];
171 (*regs)[3] = env->regs[12];
172 (*regs)[4] = env->regs[R_EBP];
173 (*regs)[5] = env->regs[R_EBX];
174 (*regs)[6] = env->regs[11];
175 (*regs)[7] = env->regs[10];
176 (*regs)[8] = env->regs[9];
177 (*regs)[9] = env->regs[8];
178 (*regs)[10] = env->regs[R_EAX];
179 (*regs)[11] = env->regs[R_ECX];
180 (*regs)[12] = env->regs[R_EDX];
181 (*regs)[13] = env->regs[R_ESI];
182 (*regs)[14] = env->regs[R_EDI];
183 (*regs)[15] = env->regs[R_EAX]; /* XXX */
184 (*regs)[16] = env->eip;
185 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
186 (*regs)[18] = env->eflags;
187 (*regs)[19] = env->regs[R_ESP];
188 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
189 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
190 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
191 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
192 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
193 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
194 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
195}
196
84409ddb
JM		 197#else
198
30ac07d4
FB		 199#define ELF_START_MMAP 0x80000000
200
30ac07d4
FB		 201/*
202 * This is used to ensure we don't load something for the wrong architecture.
203 */
204#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
205
206/*
207 * These are used to set parameters in the core dumps.
208 */
d97ef72e 209#define ELF_CLASS ELFCLASS32
d97ef72e 210#define ELF_ARCH EM_386
30ac07d4 211
d97ef72e
RH		 212static inline void init_thread(struct target_pt_regs *regs,
213 struct image_info *infop)
b346ff46
FB		 214{
215 regs->esp = infop->start_stack;
216 regs->eip = infop->entry;
e5fe0c52
PB		 217
218 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
219 starts %edx contains a pointer to a function which might be
220 registered using `atexit'. This provides a mean for the
221 dynamic linker to call DT_FINI functions for shared libraries
222 that have been loaded before the code runs.
223
224 A value of 0 tells we have no such handler. */
225 regs->edx = 0;
b346ff46 226}
9edc5d79 227
9edc5d79 228#define ELF_NREG 17
c227f099 229typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
9edc5d79
MW		 230
231/*
232 * Note that ELF_NREG should be 19 as there should be place for
233 * TRAPNO and ERR "registers" as well but linux doesn't dump
234 * those.
235 *
236 * See linux kernel: arch/x86/include/asm/elf.h
237 */
05390248 238static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
9edc5d79
MW		 239{
240 (*regs)[0] = env->regs[R_EBX];
241 (*regs)[1] = env->regs[R_ECX];
242 (*regs)[2] = env->regs[R_EDX];
243 (*regs)[3] = env->regs[R_ESI];
244 (*regs)[4] = env->regs[R_EDI];
245 (*regs)[5] = env->regs[R_EBP];
246 (*regs)[6] = env->regs[R_EAX];
247 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
248 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
249 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
250 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
251 (*regs)[11] = env->regs[R_EAX]; /* XXX */
252 (*regs)[12] = env->eip;
253 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
254 (*regs)[14] = env->eflags;
255 (*regs)[15] = env->regs[R_ESP];
256 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
257}
84409ddb 258#endif
b346ff46 259
9edc5d79 260#define USE_ELF_CORE_DUMP
d97ef72e 261#define ELF_EXEC_PAGESIZE 4096
b346ff46
FB		 262
263#endif
264
265#ifdef TARGET_ARM
266
24e76ff0
PM		 267#ifndef TARGET_AARCH64
268/* 32 bit ARM definitions */
269
b346ff46
FB		 270#define ELF_START_MMAP 0x80000000
271
b597c3f7 272#define ELF_ARCH EM_ARM
d97ef72e 273#define ELF_CLASS ELFCLASS32
b346ff46 274
d97ef72e
RH		 275static inline void init_thread(struct target_pt_regs *regs,
276 struct image_info *infop)
b346ff46 277{
992f48a0 278 abi_long stack = infop->start_stack;
b346ff46 279 memset(regs, 0, sizeof(*regs));
99033cae 280
167e4cdc
PM		 281 regs->uregs[16] = ARM_CPU_MODE_USR;
282 if (infop->entry & 1) {
283 regs->uregs[16] |= CPSR_T;
284 }
285 regs->uregs[15] = infop->entry & 0xfffffffe;
286 regs->uregs[13] = infop->start_stack;
2f619698 287 /* FIXME - what to for failure of get_user()? */
167e4cdc
PM		 288 get_user_ual(regs->uregs[2], stack + 8); /* envp */
289 get_user_ual(regs->uregs[1], stack + 4); /* envp */
a1516e92 290 /* XXX: it seems that r0 is zeroed after ! */
167e4cdc 291 regs->uregs[0] = 0;
e5fe0c52 292 /* For uClinux PIC binaries. */
863cf0b7 293 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
167e4cdc 294 regs->uregs[10] = infop->start_data;
3cb10cfa
CL		 295
296 /* Support ARM FDPIC. */
297 if (info_is_fdpic(infop)) {
298 /* As described in the ABI document, r7 points to the loadmap info
299 * prepared by the kernel. If an interpreter is needed, r8 points
300 * to the interpreter loadmap and r9 points to the interpreter
301 * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and
302 * r9 points to the main program PT_DYNAMIC info.
303 */
304 regs->uregs[7] = infop->loadmap_addr;
305 if (infop->interpreter_loadmap_addr) {
306 /* Executable is dynamically loaded. */
307 regs->uregs[8] = infop->interpreter_loadmap_addr;
308 regs->uregs[9] = infop->interpreter_pt_dynamic_addr;
309 } else {
310 regs->uregs[8] = 0;
311 regs->uregs[9] = infop->pt_dynamic_addr;
312 }
313 }
b346ff46
FB		 314}
315
edf8e2af 316#define ELF_NREG 18
c227f099 317typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 318
05390248 319static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
edf8e2af 320{
86cd7b2d
PB		 321 (*regs)[0] = tswapreg(env->regs[0]);
322 (*regs)[1] = tswapreg(env->regs[1]);
323 (*regs)[2] = tswapreg(env->regs[2]);
324 (*regs)[3] = tswapreg(env->regs[3]);
325 (*regs)[4] = tswapreg(env->regs[4]);
326 (*regs)[5] = tswapreg(env->regs[5]);
327 (*regs)[6] = tswapreg(env->regs[6]);
328 (*regs)[7] = tswapreg(env->regs[7]);
329 (*regs)[8] = tswapreg(env->regs[8]);
330 (*regs)[9] = tswapreg(env->regs[9]);
331 (*regs)[10] = tswapreg(env->regs[10]);
332 (*regs)[11] = tswapreg(env->regs[11]);
333 (*regs)[12] = tswapreg(env->regs[12]);
334 (*regs)[13] = tswapreg(env->regs[13]);
335 (*regs)[14] = tswapreg(env->regs[14]);
336 (*regs)[15] = tswapreg(env->regs[15]);
337
338 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
339 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
edf8e2af
MW		 340}
341
30ac07d4 342#define USE_ELF_CORE_DUMP
d97ef72e 343#define ELF_EXEC_PAGESIZE 4096
30ac07d4 344
afce2927
FB		 345enum
346{
d97ef72e
RH		 347 ARM_HWCAP_ARM_SWP = 1 << 0,
348 ARM_HWCAP_ARM_HALF = 1 << 1,
349 ARM_HWCAP_ARM_THUMB = 1 << 2,
350 ARM_HWCAP_ARM_26BIT = 1 << 3,
351 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
352 ARM_HWCAP_ARM_FPA = 1 << 5,
353 ARM_HWCAP_ARM_VFP = 1 << 6,
354 ARM_HWCAP_ARM_EDSP = 1 << 7,
355 ARM_HWCAP_ARM_JAVA = 1 << 8,
356 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
43ce393e
PM		 357 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
358 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
359 ARM_HWCAP_ARM_NEON = 1 << 12,
360 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
361 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
24682654
PM		 362 ARM_HWCAP_ARM_TLS = 1 << 15,
363 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
364 ARM_HWCAP_ARM_IDIVA = 1 << 17,
365 ARM_HWCAP_ARM_IDIVT = 1 << 18,
366 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
367 ARM_HWCAP_ARM_LPAE = 1 << 20,
368 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
afce2927
FB		 369};
370
ad6919dc
PM		 371enum {
372 ARM_HWCAP2_ARM_AES = 1 << 0,
373 ARM_HWCAP2_ARM_PMULL = 1 << 1,
374 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
375 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
376 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
377};
378
6b1275ff
PM		 379/* The commpage only exists for 32 bit kernels */
380
806d1021
MI		 381/* Return 1 if the proposed guest space is suitable for the guest.
382 * Return 0 if the proposed guest space isn't suitable, but another
383 * address space should be tried.
384 * Return -1 if there is no way the proposed guest space can be
385 * valid regardless of the base.
386 * The guest code may leave a page mapped and populate it if the
387 * address is suitable.
388 */
c3637eaf
LS		 389static int init_guest_commpage(unsigned long guest_base,
390 unsigned long guest_size)
97cc7560
DDAG		 391{
392 unsigned long real_start, test_page_addr;
393
394 /* We need to check that we can force a fault on access to the
395 * commpage at 0xffff0fxx
396 */
397 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
806d1021
MI		 398
399 /* If the commpage lies within the already allocated guest space,
400 * then there is no way we can allocate it.
955e304f
LS		 401 *
402 * You may be thinking that that this check is redundant because
403 * we already validated the guest size against MAX_RESERVED_VA;
404 * but if qemu_host_page_mask is unusually large, then
405 * test_page_addr may be lower.
806d1021
MI		 406 */
407 if (test_page_addr >= guest_base
e568f9df 408 && test_page_addr < (guest_base + guest_size)) {
806d1021
MI		 409 return -1;
410 }
411
97cc7560
DDAG		 412 /* Note it needs to be writeable to let us initialise it */
413 real_start = (unsigned long)
414 mmap((void *)test_page_addr, qemu_host_page_size,
415 PROT_READ | PROT_WRITE,
416 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
417
418 /* If we can't map it then try another address */
419 if (real_start == -1ul) {
420 return 0;
421 }
422
423 if (real_start != test_page_addr) {
424 /* OS didn't put the page where we asked - unmap and reject */
425 munmap((void *)real_start, qemu_host_page_size);
426 return 0;
427 }
428
429 /* Leave the page mapped
430 * Populate it (mmap should have left it all 0'd)
431 */
432
433 /* Kernel helper versions */
434 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
435
436 /* Now it's populated make it RO */
437 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
438 perror("Protecting guest commpage");
439 exit(-1);
440 }
441
442 return 1; /* All good */
443}
adf050b1
BC		 444
445#define ELF_HWCAP get_elf_hwcap()
ad6919dc 446#define ELF_HWCAP2 get_elf_hwcap2()
adf050b1
BC		 447
448static uint32_t get_elf_hwcap(void)
449{
a2247f8e 450 ARMCPU *cpu = ARM_CPU(thread_cpu);
adf050b1
BC		 451 uint32_t hwcaps = 0;
452
453 hwcaps |= ARM_HWCAP_ARM_SWP;
454 hwcaps |= ARM_HWCAP_ARM_HALF;
455 hwcaps |= ARM_HWCAP_ARM_THUMB;
456 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
adf050b1
BC		 457
458 /* probe for the extra features */
459#define GET_FEATURE(feat, hwcap) \
a2247f8e 460 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
962fcbf2
RH		 461
462#define GET_FEATURE_ID(feat, hwcap) \
463 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
464
24682654
PM		 465 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
466 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
adf050b1
BC		 467 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
468 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
469 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
470 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
471 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
24682654
PM		 472 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
473 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
7e0cf8b4
RH		 474 GET_FEATURE_ID(arm_div, ARM_HWCAP_ARM_IDIVA);
475 GET_FEATURE_ID(thumb_div, ARM_HWCAP_ARM_IDIVT);
24682654
PM		 476 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
477 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
478 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
479 * to our VFP_FP16 feature bit.
480 */
481 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
482 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
adf050b1
BC		 483
484 return hwcaps;
485}
afce2927 486
ad6919dc
PM		 487static uint32_t get_elf_hwcap2(void)
488{
489 ARMCPU *cpu = ARM_CPU(thread_cpu);
490 uint32_t hwcaps = 0;
491
962fcbf2
RH		 492 GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES);
493 GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL);
494 GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1);
495 GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2);
496 GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32);
ad6919dc
PM		 497 return hwcaps;
498}
499
500#undef GET_FEATURE
962fcbf2 501#undef GET_FEATURE_ID
ad6919dc 502
13ec4ec3
RH		 503#define ELF_PLATFORM get_elf_platform()
504
505static const char *get_elf_platform(void)
506{
507 CPUARMState *env = thread_cpu->env_ptr;
508
509#ifdef TARGET_WORDS_BIGENDIAN
510# define END "b"
511#else
512# define END "l"
513#endif
514
515 if (arm_feature(env, ARM_FEATURE_V8)) {
516 return "v8" END;
517 } else if (arm_feature(env, ARM_FEATURE_V7)) {
518 if (arm_feature(env, ARM_FEATURE_M)) {
519 return "v7m" END;
520 } else {
521 return "v7" END;
522 }
523 } else if (arm_feature(env, ARM_FEATURE_V6)) {
524 return "v6" END;
525 } else if (arm_feature(env, ARM_FEATURE_V5)) {
526 return "v5" END;
527 } else {
528 return "v4" END;
529 }
530
531#undef END
532}
533
24e76ff0
PM		 534#else
535/* 64 bit ARM definitions */
536#define ELF_START_MMAP 0x80000000
537
b597c3f7 538#define ELF_ARCH EM_AARCH64
24e76ff0 539#define ELF_CLASS ELFCLASS64
e20e3ec9
RH		 540#ifdef TARGET_WORDS_BIGENDIAN
541# define ELF_PLATFORM "aarch64_be"
542#else
543# define ELF_PLATFORM "aarch64"
544#endif
24e76ff0
PM		 545
546static inline void init_thread(struct target_pt_regs *regs,
547 struct image_info *infop)
548{
549 abi_long stack = infop->start_stack;
550 memset(regs, 0, sizeof(*regs));
551
552 regs->pc = infop->entry & ~0x3ULL;
553 regs->sp = stack;
554}
555
556#define ELF_NREG 34
557typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
558
559static void elf_core_copy_regs(target_elf_gregset_t *regs,
560 const CPUARMState *env)
561{
562 int i;
563
564 for (i = 0; i < 32; i++) {
565 (*regs)[i] = tswapreg(env->xregs[i]);
566 }
567 (*regs)[32] = tswapreg(env->pc);
568 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
569}
570
571#define USE_ELF_CORE_DUMP
572#define ELF_EXEC_PAGESIZE 4096
573
574enum {
575 ARM_HWCAP_A64_FP = 1 << 0,
576 ARM_HWCAP_A64_ASIMD = 1 << 1,
577 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
578 ARM_HWCAP_A64_AES = 1 << 3,
579 ARM_HWCAP_A64_PMULL = 1 << 4,
580 ARM_HWCAP_A64_SHA1 = 1 << 5,
581 ARM_HWCAP_A64_SHA2 = 1 << 6,
582 ARM_HWCAP_A64_CRC32 = 1 << 7,
955f56d4
AB		 583 ARM_HWCAP_A64_ATOMICS = 1 << 8,
584 ARM_HWCAP_A64_FPHP = 1 << 9,
585 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
586 ARM_HWCAP_A64_CPUID = 1 << 11,
587 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
588 ARM_HWCAP_A64_JSCVT = 1 << 13,
589 ARM_HWCAP_A64_FCMA = 1 << 14,
590 ARM_HWCAP_A64_LRCPC = 1 << 15,
591 ARM_HWCAP_A64_DCPOP = 1 << 16,
592 ARM_HWCAP_A64_SHA3 = 1 << 17,
593 ARM_HWCAP_A64_SM3 = 1 << 18,
594 ARM_HWCAP_A64_SM4 = 1 << 19,
595 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
596 ARM_HWCAP_A64_SHA512 = 1 << 21,
597 ARM_HWCAP_A64_SVE = 1 << 22,
0083a1fa
RH		 598 ARM_HWCAP_A64_ASIMDFHM = 1 << 23,
599 ARM_HWCAP_A64_DIT = 1 << 24,
600 ARM_HWCAP_A64_USCAT = 1 << 25,
601 ARM_HWCAP_A64_ILRCPC = 1 << 26,
602 ARM_HWCAP_A64_FLAGM = 1 << 27,
603 ARM_HWCAP_A64_SSBS = 1 << 28,
604 ARM_HWCAP_A64_SB = 1 << 29,
605 ARM_HWCAP_A64_PACA = 1 << 30,
606 ARM_HWCAP_A64_PACG = 1UL << 31,
24e76ff0
PM		 607};
608
609#define ELF_HWCAP get_elf_hwcap()
610
611static uint32_t get_elf_hwcap(void)
612{
613 ARMCPU *cpu = ARM_CPU(thread_cpu);
614 uint32_t hwcaps = 0;
615
616 hwcaps |= ARM_HWCAP_A64_FP;
617 hwcaps |= ARM_HWCAP_A64_ASIMD;
37020ff1 618 hwcaps |= ARM_HWCAP_A64_CPUID;
24e76ff0
PM		 619
620 /* probe for the extra features */
962fcbf2
RH		 621#define GET_FEATURE_ID(feat, hwcap) \
622 do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0)
623
624 GET_FEATURE_ID(aa64_aes, ARM_HWCAP_A64_AES);
625 GET_FEATURE_ID(aa64_pmull, ARM_HWCAP_A64_PMULL);
626 GET_FEATURE_ID(aa64_sha1, ARM_HWCAP_A64_SHA1);
627 GET_FEATURE_ID(aa64_sha256, ARM_HWCAP_A64_SHA2);
628 GET_FEATURE_ID(aa64_sha512, ARM_HWCAP_A64_SHA512);
629 GET_FEATURE_ID(aa64_crc32, ARM_HWCAP_A64_CRC32);
630 GET_FEATURE_ID(aa64_sha3, ARM_HWCAP_A64_SHA3);
631 GET_FEATURE_ID(aa64_sm3, ARM_HWCAP_A64_SM3);
632 GET_FEATURE_ID(aa64_sm4, ARM_HWCAP_A64_SM4);
5763190f 633 GET_FEATURE_ID(aa64_fp16, ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
962fcbf2
RH		 634 GET_FEATURE_ID(aa64_atomics, ARM_HWCAP_A64_ATOMICS);
635 GET_FEATURE_ID(aa64_rdm, ARM_HWCAP_A64_ASIMDRDM);
636 GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP);
637 GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA);
cd208a1c 638 GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE);
29d26ab2 639 GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG);
1c9af3a9
RH		 640 GET_FEATURE_ID(aa64_fhm, ARM_HWCAP_A64_ASIMDFHM);
641 GET_FEATURE_ID(aa64_jscvt, ARM_HWCAP_A64_JSCVT);
9888bd1e 642 GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB);
b89d9c98 643 GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM);
962fcbf2 644
962fcbf2 645#undef GET_FEATURE_ID
24e76ff0
PM		 646
647 return hwcaps;
648}
649
650#endif /* not TARGET_AARCH64 */
651#endif /* TARGET_ARM */
30ac07d4 652
853d6f7a 653#ifdef TARGET_SPARC
a315a145 654#ifdef TARGET_SPARC64
853d6f7a
FB		 655
656#define ELF_START_MMAP 0x80000000
cf973e46
AT		 657#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
658 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
992f48a0 659#ifndef TARGET_ABI32
cb33da57 660#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
992f48a0
BS		 661#else
662#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
663#endif
853d6f7a 664
a315a145 665#define ELF_CLASS ELFCLASS64
5ef54116
FB		 666#define ELF_ARCH EM_SPARCV9
667
d97ef72e 668#define STACK_BIAS 2047
a315a145 669
d97ef72e
RH		 670static inline void init_thread(struct target_pt_regs *regs,
671 struct image_info *infop)
a315a145 672{
992f48a0 673#ifndef TARGET_ABI32
a315a145 674 regs->tstate = 0;
992f48a0 675#endif
a315a145
FB		 676 regs->pc = infop->entry;
677 regs->npc = regs->pc + 4;
678 regs->y = 0;
992f48a0
BS		 679#ifdef TARGET_ABI32
680 regs->u_regs[14] = infop->start_stack - 16 * 4;
681#else
cb33da57
BS		 682 if (personality(infop->personality) == PER_LINUX32)
683 regs->u_regs[14] = infop->start_stack - 16 * 4;
684 else
685 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
992f48a0 686#endif
a315a145
FB		 687}
688
689#else
690#define ELF_START_MMAP 0x80000000
cf973e46
AT		 691#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
692 | HWCAP_SPARC_MULDIV)
a315a145 693
853d6f7a 694#define ELF_CLASS ELFCLASS32
853d6f7a
FB		 695#define ELF_ARCH EM_SPARC
696
d97ef72e
RH		 697static inline void init_thread(struct target_pt_regs *regs,
698 struct image_info *infop)
853d6f7a 699{
f5155289
FB		 700 regs->psr = 0;
701 regs->pc = infop->entry;
702 regs->npc = regs->pc + 4;
703 regs->y = 0;
704 regs->u_regs[14] = infop->start_stack - 16 * 4;
853d6f7a
FB		 705}
706
a315a145 707#endif
853d6f7a
FB		 708#endif
709
67867308
FB		 710#ifdef TARGET_PPC
711
4ecd4d16 712#define ELF_MACHINE PPC_ELF_MACHINE
67867308
FB		 713#define ELF_START_MMAP 0x80000000
714
e85e7c6e 715#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
84409ddb
JM		 716
717#define elf_check_arch(x) ( (x) == EM_PPC64 )
718
d97ef72e 719#define ELF_CLASS ELFCLASS64
84409ddb
JM		 720
721#else
722
d97ef72e 723#define ELF_CLASS ELFCLASS32
84409ddb
JM		 724
725#endif
726
d97ef72e 727#define ELF_ARCH EM_PPC
67867308 728
df84e4f3
NF		 729/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
730 See arch/powerpc/include/asm/cputable.h. */
731enum {
3efa9a67 732 QEMU_PPC_FEATURE_32 = 0x80000000,
733 QEMU_PPC_FEATURE_64 = 0x40000000,
734 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
735 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
736 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
737 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
738 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
739 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
740 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
741 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
742 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
743 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
744 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
745 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
746 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
747 QEMU_PPC_FEATURE_CELL = 0x00010000,
748 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
749 QEMU_PPC_FEATURE_SMT = 0x00004000,
750 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
751 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
752 QEMU_PPC_FEATURE_PA6T = 0x00000800,
753 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
754 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
755 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
756 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
757 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
758
759 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
760 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
a60438dd
TM		 761
762 /* Feature definitions in AT_HWCAP2. */
763 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
764 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
765 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
766 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
767 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
768 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
be0c46d4 769 QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
df84e4f3
NF		 770};
771
772#define ELF_HWCAP get_elf_hwcap()
773
774static uint32_t get_elf_hwcap(void)
775{
a2247f8e 776 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
df84e4f3
NF		 777 uint32_t features = 0;
778
779 /* We don't have to be terribly complete here; the high points are
780 Altivec/FP/SPE support. Anything else is just a bonus. */
d97ef72e 781#define GET_FEATURE(flag, feature) \
a2247f8e 782 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
58eb5308
MW		 783#define GET_FEATURE2(flags, feature) \
784 do { \
785 if ((cpu->env.insns_flags2 & flags) == flags) { \
786 features |= feature; \
787 } \
788 } while (0)
3efa9a67 789 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
790 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
791 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
792 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
793 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
794 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
795 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
796 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
0e019746
TM		 797 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
798 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
799 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
800 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
801 QEMU_PPC_FEATURE_ARCH_2_06);
df84e4f3 802#undef GET_FEATURE
0e019746 803#undef GET_FEATURE2
df84e4f3
NF		 804
805 return features;
806}
807
a60438dd
TM		 808#define ELF_HWCAP2 get_elf_hwcap2()
809
810static uint32_t get_elf_hwcap2(void)
811{
812 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
813 uint32_t features = 0;
814
815#define GET_FEATURE(flag, feature) \
816 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
817#define GET_FEATURE2(flag, feature) \
818 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
819
820 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
821 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
822 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
823 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
be0c46d4 824 GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00);
a60438dd
TM		 825
826#undef GET_FEATURE
827#undef GET_FEATURE2
828
829 return features;
830}
831
f5155289
FB		 832/*
833 * The requirements here are:
834 * - keep the final alignment of sp (sp & 0xf)
835 * - make sure the 32-bit value at the first 16 byte aligned position of
836 * AUXV is greater than 16 for glibc compatibility.
837 * AT_IGNOREPPC is used for that.
838 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
839 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
840 */
0bccf03d 841#define DLINFO_ARCH_ITEMS 5
d97ef72e
RH		 842#define ARCH_DLINFO \
843 do { \
623e250a 844 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
d97ef72e 845 /* \
82991bed
PM		 846 * Handle glibc compatibility: these magic entries must \
847 * be at the lowest addresses in the final auxv. \
d97ef72e
RH		 848 */ \
849 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
850 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
82991bed
PM		 851 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
852 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
853 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
d97ef72e 854 } while (0)
f5155289 855
67867308
FB		 856static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
857{
67867308 858 _regs->gpr[1] = infop->start_stack;
e85e7c6e 859#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
d90b94cd 860 if (get_ppc64_abi(infop) < 2) {
2ccf97ec
PM		 861 uint64_t val;
862 get_user_u64(val, infop->entry + 8);
863 _regs->gpr[2] = val + infop->load_bias;
864 get_user_u64(val, infop->entry);
865 infop->entry = val + infop->load_bias;
d90b94cd
DK		 866 } else {
867 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
868 }
84409ddb 869#endif
67867308
FB		 870 _regs->nip = infop->entry;
871}
872
e2f3e741
NF		 873/* See linux kernel: arch/powerpc/include/asm/elf.h. */
874#define ELF_NREG 48
875typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
876
05390248 877static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
e2f3e741
NF		 878{
879 int i;
880 target_ulong ccr = 0;
881
882 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
86cd7b2d 883 (*regs)[i] = tswapreg(env->gpr[i]);
e2f3e741
NF		 884 }
885
86cd7b2d
PB		 886 (*regs)[32] = tswapreg(env->nip);
887 (*regs)[33] = tswapreg(env->msr);
888 (*regs)[35] = tswapreg(env->ctr);
889 (*regs)[36] = tswapreg(env->lr);
890 (*regs)[37] = tswapreg(env->xer);
e2f3e741
NF		 891
892 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
893 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
894 }
86cd7b2d 895 (*regs)[38] = tswapreg(ccr);
e2f3e741
NF		 896}
897
898#define USE_ELF_CORE_DUMP
d97ef72e 899#define ELF_EXEC_PAGESIZE 4096
67867308
FB		 900
901#endif
902
048f6b4d
FB		 903#ifdef TARGET_MIPS
904
905#define ELF_START_MMAP 0x80000000
906
388bb21a
TS		 907#ifdef TARGET_MIPS64
908#define ELF_CLASS ELFCLASS64
909#else
048f6b4d 910#define ELF_CLASS ELFCLASS32
388bb21a 911#endif
048f6b4d
FB		 912#define ELF_ARCH EM_MIPS
913
f72541f3
AM		 914#define elf_check_arch(x) ((x) == EM_MIPS || (x) == EM_NANOMIPS)
915
d97ef72e
RH		 916static inline void init_thread(struct target_pt_regs *regs,
917 struct image_info *infop)
048f6b4d 918{
623a930e 919 regs->cp0_status = 2 << CP0St_KSU;
048f6b4d
FB		 920 regs->cp0_epc = infop->entry;
921 regs->regs[29] = infop->start_stack;
922}
923
51e52606
NF		 924/* See linux kernel: arch/mips/include/asm/elf.h. */
925#define ELF_NREG 45
926typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
927
928/* See linux kernel: arch/mips/include/asm/reg.h. */
929enum {
930#ifdef TARGET_MIPS64
931 TARGET_EF_R0 = 0,
932#else
933 TARGET_EF_R0 = 6,
934#endif
935 TARGET_EF_R26 = TARGET_EF_R0 + 26,
936 TARGET_EF_R27 = TARGET_EF_R0 + 27,
937 TARGET_EF_LO = TARGET_EF_R0 + 32,
938 TARGET_EF_HI = TARGET_EF_R0 + 33,
939 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
940 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
941 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
942 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
943};
944
945/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 946static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
51e52606
NF		 947{
948 int i;
949
950 for (i = 0; i < TARGET_EF_R0; i++) {
951 (*regs)[i] = 0;
952 }
953 (*regs)[TARGET_EF_R0] = 0;
954
955 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
a29f998d 956 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
51e52606
NF		 957 }
958
959 (*regs)[TARGET_EF_R26] = 0;
960 (*regs)[TARGET_EF_R27] = 0;
a29f998d
PB		 961 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
962 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
963 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
964 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
965 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
966 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
51e52606
NF		 967}
968
969#define USE_ELF_CORE_DUMP
388bb21a
TS		 970#define ELF_EXEC_PAGESIZE 4096
971
46a1ee4f
JC		 972/* See arch/mips/include/uapi/asm/hwcap.h. */
973enum {
974 HWCAP_MIPS_R6 = (1 << 0),
975 HWCAP_MIPS_MSA = (1 << 1),
976};
977
978#define ELF_HWCAP get_elf_hwcap()
979
980static uint32_t get_elf_hwcap(void)
981{
982 MIPSCPU *cpu = MIPS_CPU(thread_cpu);
983 uint32_t hwcaps = 0;
984
985#define GET_FEATURE(flag, hwcap) \
986 do { if (cpu->env.insn_flags & (flag)) { hwcaps |= hwcap; } } while (0)
987
988 GET_FEATURE(ISA_MIPS32R6 | ISA_MIPS64R6, HWCAP_MIPS_R6);
989 GET_FEATURE(ASE_MSA, HWCAP_MIPS_MSA);
990
991#undef GET_FEATURE
992
993 return hwcaps;
994}
995
048f6b4d
FB		 996#endif /* TARGET_MIPS */
997
b779e29e
EI		 998#ifdef TARGET_MICROBLAZE
999
1000#define ELF_START_MMAP 0x80000000
1001
0d5d4699 1002#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
b779e29e
EI		 1003
1004#define ELF_CLASS ELFCLASS32
0d5d4699 1005#define ELF_ARCH EM_MICROBLAZE
b779e29e 1006
d97ef72e
RH		 1007static inline void init_thread(struct target_pt_regs *regs,
1008 struct image_info *infop)
b779e29e
EI		 1009{
1010 regs->pc = infop->entry;
1011 regs->r1 = infop->start_stack;
1012
1013}
1014
b779e29e
EI		 1015#define ELF_EXEC_PAGESIZE 4096
1016
e4cbd44d
EI		 1017#define USE_ELF_CORE_DUMP
1018#define ELF_NREG 38
1019typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1020
1021/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
05390248 1022static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
e4cbd44d
EI		 1023{
1024 int i, pos = 0;
1025
1026 for (i = 0; i < 32; i++) {
86cd7b2d 1027 (*regs)[pos++] = tswapreg(env->regs[i]);
e4cbd44d
EI		 1028 }
1029
1030 for (i = 0; i < 6; i++) {
86cd7b2d 1031 (*regs)[pos++] = tswapreg(env->sregs[i]);
e4cbd44d
EI		 1032 }
1033}
1034
b779e29e
EI		 1035#endif /* TARGET_MICROBLAZE */
1036
a0a839b6
MV		 1037#ifdef TARGET_NIOS2
1038
1039#define ELF_START_MMAP 0x80000000
1040
1041#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
1042
1043#define ELF_CLASS ELFCLASS32
1044#define ELF_ARCH EM_ALTERA_NIOS2
1045
1046static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1047{
1048 regs->ea = infop->entry;
1049 regs->sp = infop->start_stack;
1050 regs->estatus = 0x3;
1051}
1052
1053#define ELF_EXEC_PAGESIZE 4096
1054
1055#define USE_ELF_CORE_DUMP
1056#define ELF_NREG 49
1057typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1058
1059/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
1060static void elf_core_copy_regs(target_elf_gregset_t *regs,
1061 const CPUNios2State *env)
1062{
1063 int i;
1064
1065 (*regs)[0] = -1;
1066 for (i = 1; i < 8; i++) /* r0-r7 */
1067 (*regs)[i] = tswapreg(env->regs[i + 7]);
1068
1069 for (i = 8; i < 16; i++) /* r8-r15 */
1070 (*regs)[i] = tswapreg(env->regs[i - 8]);
1071
1072 for (i = 16; i < 24; i++) /* r16-r23 */
1073 (*regs)[i] = tswapreg(env->regs[i + 7]);
1074 (*regs)[24] = -1; /* R_ET */
1075 (*regs)[25] = -1; /* R_BT */
1076 (*regs)[26] = tswapreg(env->regs[R_GP]);
1077 (*regs)[27] = tswapreg(env->regs[R_SP]);
1078 (*regs)[28] = tswapreg(env->regs[R_FP]);
1079 (*regs)[29] = tswapreg(env->regs[R_EA]);
1080 (*regs)[30] = -1; /* R_SSTATUS */
1081 (*regs)[31] = tswapreg(env->regs[R_RA]);
1082
1083 (*regs)[32] = tswapreg(env->regs[R_PC]);
1084
1085 (*regs)[33] = -1; /* R_STATUS */
1086 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1087
1088 for (i = 35; i < 49; i++) /* ... */
1089 (*regs)[i] = -1;
1090}
1091
1092#endif /* TARGET_NIOS2 */
1093
d962783e
JL		 1094#ifdef TARGET_OPENRISC
1095
1096#define ELF_START_MMAP 0x08000000
1097
d962783e
JL		 1098#define ELF_ARCH EM_OPENRISC
1099#define ELF_CLASS ELFCLASS32
1100#define ELF_DATA ELFDATA2MSB
1101
1102static inline void init_thread(struct target_pt_regs *regs,
1103 struct image_info *infop)
1104{
1105 regs->pc = infop->entry;
1106 regs->gpr[1] = infop->start_stack;
1107}
1108
1109#define USE_ELF_CORE_DUMP
1110#define ELF_EXEC_PAGESIZE 8192
1111
1112/* See linux kernel arch/openrisc/include/asm/elf.h. */
1113#define ELF_NREG 34 /* gprs and pc, sr */
1114typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1115
1116static void elf_core_copy_regs(target_elf_gregset_t *regs,
1117 const CPUOpenRISCState *env)
1118{
1119 int i;
1120
1121 for (i = 0; i < 32; i++) {
d89e71e8 1122 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
d962783e 1123 }
86cd7b2d 1124 (*regs)[32] = tswapreg(env->pc);
84775c43 1125 (*regs)[33] = tswapreg(cpu_get_sr(env));
d962783e
JL		 1126}
1127#define ELF_HWCAP 0
1128#define ELF_PLATFORM NULL
1129
1130#endif /* TARGET_OPENRISC */
1131
fdf9b3e8
FB		 1132#ifdef TARGET_SH4
1133
1134#define ELF_START_MMAP 0x80000000
1135
fdf9b3e8 1136#define ELF_CLASS ELFCLASS32
fdf9b3e8
FB		 1137#define ELF_ARCH EM_SH
1138
d97ef72e
RH		 1139static inline void init_thread(struct target_pt_regs *regs,
1140 struct image_info *infop)
fdf9b3e8 1141{
d97ef72e
RH		 1142 /* Check other registers XXXXX */
1143 regs->pc = infop->entry;
1144 regs->regs[15] = infop->start_stack;
fdf9b3e8
FB		 1145}
1146
7631c97e
NF		 1147/* See linux kernel: arch/sh/include/asm/elf.h. */
1148#define ELF_NREG 23
1149typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1150
1151/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1152enum {
1153 TARGET_REG_PC = 16,
1154 TARGET_REG_PR = 17,
1155 TARGET_REG_SR = 18,
1156 TARGET_REG_GBR = 19,
1157 TARGET_REG_MACH = 20,
1158 TARGET_REG_MACL = 21,
1159 TARGET_REG_SYSCALL = 22
1160};
1161
d97ef72e 1162static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
05390248 1163 const CPUSH4State *env)
7631c97e
NF		 1164{
1165 int i;
1166
1167 for (i = 0; i < 16; i++) {
72cd500b 1168 (*regs)[i] = tswapreg(env->gregs[i]);
7631c97e
NF		 1169 }
1170
86cd7b2d
PB		 1171 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1172 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1173 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1174 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1175 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1176 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
7631c97e
NF		 1177 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1178}
1179
1180#define USE_ELF_CORE_DUMP
fdf9b3e8
FB		 1181#define ELF_EXEC_PAGESIZE 4096
1182
e42fd944
RH		 1183enum {
1184 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1185 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1186 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1187 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1188 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1189 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1190 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1191 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1192 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1193 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1194};
1195
1196#define ELF_HWCAP get_elf_hwcap()
1197
1198static uint32_t get_elf_hwcap(void)
1199{
1200 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1201 uint32_t hwcap = 0;
1202
1203 hwcap |= SH_CPU_HAS_FPU;
1204
1205 if (cpu->env.features & SH_FEATURE_SH4A) {
1206 hwcap |= SH_CPU_HAS_LLSC;
1207 }
1208
1209 return hwcap;
1210}
1211
fdf9b3e8
FB		 1212#endif
1213
48733d19
TS		 1214#ifdef TARGET_CRIS
1215
1216#define ELF_START_MMAP 0x80000000
1217
48733d19 1218#define ELF_CLASS ELFCLASS32
48733d19
TS		 1219#define ELF_ARCH EM_CRIS
1220
d97ef72e
RH		 1221static inline void init_thread(struct target_pt_regs *regs,
1222 struct image_info *infop)
48733d19 1223{
d97ef72e 1224 regs->erp = infop->entry;
48733d19
TS		 1225}
1226
48733d19
TS		 1227#define ELF_EXEC_PAGESIZE 8192
1228
1229#endif
1230
e6e5906b
PB		 1231#ifdef TARGET_M68K
1232
1233#define ELF_START_MMAP 0x80000000
1234
d97ef72e 1235#define ELF_CLASS ELFCLASS32
d97ef72e 1236#define ELF_ARCH EM_68K
e6e5906b
PB		 1237
1238/* ??? Does this need to do anything?
d97ef72e 1239 #define ELF_PLAT_INIT(_r) */
e6e5906b 1240
d97ef72e
RH		 1241static inline void init_thread(struct target_pt_regs *regs,
1242 struct image_info *infop)
e6e5906b
PB		 1243{
1244 regs->usp = infop->start_stack;
1245 regs->sr = 0;
1246 regs->pc = infop->entry;
1247}
1248
7a93cc55
NF		 1249/* See linux kernel: arch/m68k/include/asm/elf.h. */
1250#define ELF_NREG 20
1251typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1252
05390248 1253static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
7a93cc55 1254{
86cd7b2d
PB		 1255 (*regs)[0] = tswapreg(env->dregs[1]);
1256 (*regs)[1] = tswapreg(env->dregs[2]);
1257 (*regs)[2] = tswapreg(env->dregs[3]);
1258 (*regs)[3] = tswapreg(env->dregs[4]);
1259 (*regs)[4] = tswapreg(env->dregs[5]);
1260 (*regs)[5] = tswapreg(env->dregs[6]);
1261 (*regs)[6] = tswapreg(env->dregs[7]);
1262 (*regs)[7] = tswapreg(env->aregs[0]);
1263 (*regs)[8] = tswapreg(env->aregs[1]);
1264 (*regs)[9] = tswapreg(env->aregs[2]);
1265 (*regs)[10] = tswapreg(env->aregs[3]);
1266 (*regs)[11] = tswapreg(env->aregs[4]);
1267 (*regs)[12] = tswapreg(env->aregs[5]);
1268 (*regs)[13] = tswapreg(env->aregs[6]);
1269 (*regs)[14] = tswapreg(env->dregs[0]);
1270 (*regs)[15] = tswapreg(env->aregs[7]);
1271 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1272 (*regs)[17] = tswapreg(env->sr);
1273 (*regs)[18] = tswapreg(env->pc);
7a93cc55
NF		 1274 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1275}
1276
1277#define USE_ELF_CORE_DUMP
d97ef72e 1278#define ELF_EXEC_PAGESIZE 8192
e6e5906b
PB		 1279
1280#endif
1281
7a3148a9
JM		 1282#ifdef TARGET_ALPHA
1283
1284#define ELF_START_MMAP (0x30000000000ULL)
1285
7a3148a9 1286#define ELF_CLASS ELFCLASS64
7a3148a9
JM		 1287#define ELF_ARCH EM_ALPHA
1288
d97ef72e
RH		 1289static inline void init_thread(struct target_pt_regs *regs,
1290 struct image_info *infop)
7a3148a9
JM		 1291{
1292 regs->pc = infop->entry;
1293 regs->ps = 8;
1294 regs->usp = infop->start_stack;
7a3148a9
JM		 1295}
1296
7a3148a9
JM		 1297#define ELF_EXEC_PAGESIZE 8192
1298
1299#endif /* TARGET_ALPHA */
1300
a4c075f1
UH		 1301#ifdef TARGET_S390X
1302
1303#define ELF_START_MMAP (0x20000000000ULL)
1304
a4c075f1
UH		 1305#define ELF_CLASS ELFCLASS64
1306#define ELF_DATA ELFDATA2MSB
1307#define ELF_ARCH EM_S390
1308
1309static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1310{
1311 regs->psw.addr = infop->entry;
1312 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1313 regs->gprs[15] = infop->start_stack;
1314}
1315
1316#endif /* TARGET_S390X */
1317
b16189b2
CG		 1318#ifdef TARGET_TILEGX
1319
1320/* 42 bits real used address, a half for user mode */
1321#define ELF_START_MMAP (0x00000020000000000ULL)
1322
1323#define elf_check_arch(x) ((x) == EM_TILEGX)
1324
1325#define ELF_CLASS ELFCLASS64
1326#define ELF_DATA ELFDATA2LSB
1327#define ELF_ARCH EM_TILEGX
1328
1329static inline void init_thread(struct target_pt_regs *regs,
1330 struct image_info *infop)
1331{
1332 regs->pc = infop->entry;
1333 regs->sp = infop->start_stack;
1334
1335}
1336
1337#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1338
1339#endif /* TARGET_TILEGX */
1340
47ae93cd
MC		 1341#ifdef TARGET_RISCV
1342
1343#define ELF_START_MMAP 0x80000000
1344#define ELF_ARCH EM_RISCV
1345
1346#ifdef TARGET_RISCV32
1347#define ELF_CLASS ELFCLASS32
1348#else
1349#define ELF_CLASS ELFCLASS64
1350#endif
1351
1352static inline void init_thread(struct target_pt_regs *regs,
1353 struct image_info *infop)
1354{
1355 regs->sepc = infop->entry;
1356 regs->sp = infop->start_stack;
1357}
1358
1359#define ELF_EXEC_PAGESIZE 4096
1360
1361#endif /* TARGET_RISCV */
1362
7c248bcd
RH		 1363#ifdef TARGET_HPPA
1364
1365#define ELF_START_MMAP 0x80000000
1366#define ELF_CLASS ELFCLASS32
1367#define ELF_ARCH EM_PARISC
1368#define ELF_PLATFORM "PARISC"
1369#define STACK_GROWS_DOWN 0
1370#define STACK_ALIGNMENT 64
1371
1372static inline void init_thread(struct target_pt_regs *regs,
1373 struct image_info *infop)
1374{
1375 regs->iaoq[0] = infop->entry;
1376 regs->iaoq[1] = infop->entry + 4;
1377 regs->gr[23] = 0;
1378 regs->gr[24] = infop->arg_start;
1379 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1380 /* The top-of-stack contains a linkage buffer. */
1381 regs->gr[30] = infop->start_stack + 64;
1382 regs->gr[31] = infop->entry;
1383}
1384
1385#endif /* TARGET_HPPA */
1386
ba7651fb
MF		 1387#ifdef TARGET_XTENSA
1388
1389#define ELF_START_MMAP 0x20000000
1390
1391#define ELF_CLASS ELFCLASS32
1392#define ELF_ARCH EM_XTENSA
1393
1394static inline void init_thread(struct target_pt_regs *regs,
1395 struct image_info *infop)
1396{
1397 regs->windowbase = 0;
1398 regs->windowstart = 1;
1399 regs->areg[1] = infop->start_stack;
1400 regs->pc = infop->entry;
1401}
1402
1403/* See linux kernel: arch/xtensa/include/asm/elf.h. */
1404#define ELF_NREG 128
1405typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1406
1407enum {
1408 TARGET_REG_PC,
1409 TARGET_REG_PS,
1410 TARGET_REG_LBEG,
1411 TARGET_REG_LEND,
1412 TARGET_REG_LCOUNT,
1413 TARGET_REG_SAR,
1414 TARGET_REG_WINDOWSTART,
1415 TARGET_REG_WINDOWBASE,
1416 TARGET_REG_THREADPTR,
1417 TARGET_REG_AR0 = 64,
1418};
1419
1420static void elf_core_copy_regs(target_elf_gregset_t *regs,
1421 const CPUXtensaState *env)
1422{
1423 unsigned i;
1424
1425 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1426 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1427 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1428 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1429 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1430 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1431 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1432 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1433 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1434 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1435 for (i = 0; i < env->config->nareg; ++i) {
1436 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1437 }
1438}
1439
1440#define USE_ELF_CORE_DUMP
1441#define ELF_EXEC_PAGESIZE 4096
1442
1443#endif /* TARGET_XTENSA */
1444
15338fd7
FB		 1445#ifndef ELF_PLATFORM
1446#define ELF_PLATFORM (NULL)
1447#endif
1448
75be901c
PC		 1449#ifndef ELF_MACHINE
1450#define ELF_MACHINE ELF_ARCH
1451#endif
1452
d276a604
PC		 1453#ifndef elf_check_arch
1454#define elf_check_arch(x) ((x) == ELF_ARCH)
1455#endif
1456
15338fd7
FB		 1457#ifndef ELF_HWCAP
1458#define ELF_HWCAP 0
1459#endif
1460
7c4ee5bc
RH		 1461#ifndef STACK_GROWS_DOWN
1462#define STACK_GROWS_DOWN 1
1463#endif
1464
1465#ifndef STACK_ALIGNMENT
1466#define STACK_ALIGNMENT 16
1467#endif
1468
992f48a0 1469#ifdef TARGET_ABI32
cb33da57 1470#undef ELF_CLASS
992f48a0 1471#define ELF_CLASS ELFCLASS32
cb33da57
BS		 1472#undef bswaptls
1473#define bswaptls(ptr) bswap32s(ptr)
1474#endif
1475
31e31b8a 1476#include "elf.h"
09bfb054 1477
09bfb054
FB		 1478struct exec
1479{
d97ef72e
RH		 1480 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1481 unsigned int a_text; /* length of text, in bytes */
1482 unsigned int a_data; /* length of data, in bytes */
1483 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1484 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1485 unsigned int a_entry; /* start address */
1486 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1487 unsigned int a_drsize; /* length of relocation info for data, in bytes */
09bfb054
FB		 1488};
1489
1490
1491#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1492#define OMAGIC 0407
1493#define NMAGIC 0410
1494#define ZMAGIC 0413
1495#define QMAGIC 0314
1496
31e31b8a 1497/* Necessary parameters */
94894ff2
SB		 1498#define TARGET_ELF_EXEC_PAGESIZE \
1499 (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \
1500 TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE))
1501#define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE)
79cb1f1d
YK		 1502#define TARGET_ELF_PAGESTART(_v) ((_v) & \
1503 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
54936004 1504#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
31e31b8a 1505
444cd5c3 1506#define DLINFO_ITEMS 15
31e31b8a 1507
09bfb054
FB		 1508static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1509{
d97ef72e 1510 memcpy(to, from, n);
09bfb054 1511}
d691f669 1512
31e31b8a 1513#ifdef BSWAP_NEEDED
92a31b1f 1514static void bswap_ehdr(struct elfhdr *ehdr)
31e31b8a 1515{
d97ef72e
RH		 1516 bswap16s(&ehdr->e_type); /* Object file type */
1517 bswap16s(&ehdr->e_machine); /* Architecture */
1518 bswap32s(&ehdr->e_version); /* Object file version */
1519 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1520 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1521 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1522 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1523 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1524 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1525 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1526 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1527 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1528 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
31e31b8a
FB		 1529}
1530
991f8f0c 1531static void bswap_phdr(struct elf_phdr *phdr, int phnum)
31e31b8a 1532{
991f8f0c
RH		 1533 int i;
1534 for (i = 0; i < phnum; ++i, ++phdr) {
1535 bswap32s(&phdr->p_type); /* Segment type */
1536 bswap32s(&phdr->p_flags); /* Segment flags */
1537 bswaptls(&phdr->p_offset); /* Segment file offset */
1538 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1539 bswaptls(&phdr->p_paddr); /* Segment physical address */
1540 bswaptls(&phdr->p_filesz); /* Segment size in file */
1541 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1542 bswaptls(&phdr->p_align); /* Segment alignment */
1543 }
31e31b8a 1544}
689f936f 1545
991f8f0c 1546static void bswap_shdr(struct elf_shdr *shdr, int shnum)
689f936f 1547{
991f8f0c
RH		 1548 int i;
1549 for (i = 0; i < shnum; ++i, ++shdr) {
1550 bswap32s(&shdr->sh_name);
1551 bswap32s(&shdr->sh_type);
1552 bswaptls(&shdr->sh_flags);
1553 bswaptls(&shdr->sh_addr);
1554 bswaptls(&shdr->sh_offset);
1555 bswaptls(&shdr->sh_size);
1556 bswap32s(&shdr->sh_link);
1557 bswap32s(&shdr->sh_info);
1558 bswaptls(&shdr->sh_addralign);
1559 bswaptls(&shdr->sh_entsize);
1560 }
689f936f
FB		 1561}
1562
7a3148a9 1563static void bswap_sym(struct elf_sym *sym)
689f936f
FB		 1564{
1565 bswap32s(&sym->st_name);
7a3148a9
JM		 1566 bswaptls(&sym->st_value);
1567 bswaptls(&sym->st_size);
689f936f
FB		 1568 bswap16s(&sym->st_shndx);
1569}
5dd0db52
SM		 1570
1571#ifdef TARGET_MIPS
1572static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags)
1573{
1574 bswap16s(&abiflags->version);
1575 bswap32s(&abiflags->ases);
1576 bswap32s(&abiflags->isa_ext);
1577 bswap32s(&abiflags->flags1);
1578 bswap32s(&abiflags->flags2);
1579}
1580#endif
991f8f0c
RH		 1581#else
1582static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1583static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1584static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1585static inline void bswap_sym(struct elf_sym *sym) { }
5dd0db52
SM		 1586#ifdef TARGET_MIPS
1587static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { }
1588#endif
31e31b8a
FB		 1589#endif
1590
edf8e2af 1591#ifdef USE_ELF_CORE_DUMP
9349b4f9 1592static int elf_core_dump(int, const CPUArchState *);
edf8e2af 1593#endif /* USE_ELF_CORE_DUMP */
682674b8 1594static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
edf8e2af 1595
9058abdd
RH		 1596/* Verify the portions of EHDR within E_IDENT for the target.
1597 This can be performed before bswapping the entire header. */
1598static bool elf_check_ident(struct elfhdr *ehdr)
1599{
1600 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1601 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1602 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1603 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1604 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1605 && ehdr->e_ident[EI_DATA] == ELF_DATA
1606 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1607}
1608
1609/* Verify the portions of EHDR outside of E_IDENT for the target.
1610 This has to wait until after bswapping the header. */
1611static bool elf_check_ehdr(struct elfhdr *ehdr)
1612{
1613 return (elf_check_arch(ehdr->e_machine)
1614 && ehdr->e_ehsize == sizeof(struct elfhdr)
1615 && ehdr->e_phentsize == sizeof(struct elf_phdr)
9058abdd
RH		 1616 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1617}
1618
31e31b8a 1619/*
e5fe0c52 1620 * 'copy_elf_strings()' copies argument/envelope strings from user
31e31b8a
FB		 1621 * memory to free pages in kernel mem. These are in a format ready
1622 * to be put directly into the top of new user memory.
1623 *
1624 */
59baae9a
SB		 1625static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1626 abi_ulong p, abi_ulong stack_limit)
31e31b8a 1627{
59baae9a 1628 char *tmp;
7c4ee5bc 1629 int len, i;
59baae9a 1630 abi_ulong top = p;
31e31b8a
FB		 1631
1632 if (!p) {
d97ef72e 1633 return 0; /* bullet-proofing */
31e31b8a 1634 }
59baae9a 1635
7c4ee5bc
RH		 1636 if (STACK_GROWS_DOWN) {
1637 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1638 for (i = argc - 1; i >= 0; --i) {
1639 tmp = argv[i];
1640 if (!tmp) {
1641 fprintf(stderr, "VFS: argc is wrong");
1642 exit(-1);
1643 }
1644 len = strlen(tmp) + 1;
1645 tmp += len;
59baae9a 1646
7c4ee5bc
RH		 1647 if (len > (p - stack_limit)) {
1648 return 0;
1649 }
1650 while (len) {
1651 int bytes_to_copy = (len > offset) ? offset : len;
1652 tmp -= bytes_to_copy;
1653 p -= bytes_to_copy;
1654 offset -= bytes_to_copy;
1655 len -= bytes_to_copy;
1656
1657 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
1658
1659 if (offset == 0) {
1660 memcpy_to_target(p, scratch, top - p);
1661 top = p;
1662 offset = TARGET_PAGE_SIZE;
1663 }
1664 }
d97ef72e 1665 }
7c4ee5bc
RH		 1666 if (p != top) {
1667 memcpy_to_target(p, scratch + offset, top - p);
d97ef72e 1668 }
7c4ee5bc
RH		 1669 } else {
1670 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1671 for (i = 0; i < argc; ++i) {
1672 tmp = argv[i];
1673 if (!tmp) {
1674 fprintf(stderr, "VFS: argc is wrong");
1675 exit(-1);
1676 }
1677 len = strlen(tmp) + 1;
1678 if (len > (stack_limit - p)) {
1679 return 0;
1680 }
1681 while (len) {
1682 int bytes_to_copy = (len > remaining) ? remaining : len;
1683
1684 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1685
1686 tmp += bytes_to_copy;
1687 remaining -= bytes_to_copy;
1688 p += bytes_to_copy;
1689 len -= bytes_to_copy;
1690
1691 if (remaining == 0) {
1692 memcpy_to_target(top, scratch, p - top);
1693 top = p;
1694 remaining = TARGET_PAGE_SIZE;
1695 }
d97ef72e
RH		 1696 }
1697 }
7c4ee5bc
RH		 1698 if (p != top) {
1699 memcpy_to_target(top, scratch, p - top);
1700 }
59baae9a
SB		 1701 }
1702
31e31b8a
FB		 1703 return p;
1704}
1705
59baae9a
SB		 1706/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1707 * argument/environment space. Newer kernels (>2.6.33) allow more,
1708 * dependent on stack size, but guarantee at least 32 pages for
1709 * backwards compatibility.
1710 */
1711#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1712
1713static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
992f48a0 1714 struct image_info *info)
53a5960a 1715{
59baae9a 1716 abi_ulong size, error, guard;
31e31b8a 1717
703e0e89 1718 size = guest_stack_size;
59baae9a
SB		 1719 if (size < STACK_LOWER_LIMIT) {
1720 size = STACK_LOWER_LIMIT;
60dcbcb5
RH		 1721 }
1722 guard = TARGET_PAGE_SIZE;
1723 if (guard < qemu_real_host_page_size) {
1724 guard = qemu_real_host_page_size;
1725 }
1726
1727 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1728 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
09bfb054 1729 if (error == -1) {
60dcbcb5 1730 perror("mmap stack");
09bfb054
FB		 1731 exit(-1);
1732 }
31e31b8a 1733
60dcbcb5 1734 /* We reserve one extra page at the top of the stack as guard. */
7c4ee5bc
RH		 1735 if (STACK_GROWS_DOWN) {
1736 target_mprotect(error, guard, PROT_NONE);
1737 info->stack_limit = error + guard;
1738 return info->stack_limit + size - sizeof(void *);
1739 } else {
1740 target_mprotect(error + size, guard, PROT_NONE);
1741 info->stack_limit = error + size;
1742 return error;
1743 }
31e31b8a
FB		 1744}
1745
cf129f3a
RH		 1746/* Map and zero the bss. We need to explicitly zero any fractional pages
1747 after the data section (i.e. bss). */
1748static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
31e31b8a 1749{
cf129f3a
RH		 1750 uintptr_t host_start, host_map_start, host_end;
1751
1752 last_bss = TARGET_PAGE_ALIGN(last_bss);
1753
1754 /* ??? There is confusion between qemu_real_host_page_size and
1755 qemu_host_page_size here and elsewhere in target_mmap, which
1756 may lead to the end of the data section mapping from the file
1757 not being mapped. At least there was an explicit test and
1758 comment for that here, suggesting that "the file size must
1759 be known". The comment probably pre-dates the introduction
1760 of the fstat system call in target_mmap which does in fact
1761 find out the size. What isn't clear is if the workaround
1762 here is still actually needed. For now, continue with it,
1763 but merge it with the "normal" mmap that would allocate the bss. */
1764
1765 host_start = (uintptr_t) g2h(elf_bss);
1766 host_end = (uintptr_t) g2h(last_bss);
0c2d70c4 1767 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
cf129f3a
RH		 1768
1769 if (host_map_start < host_end) {
1770 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1771 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1772 if (p == MAP_FAILED) {
1773 perror("cannot mmap brk");
1774 exit(-1);
853d6f7a 1775 }
f46e9a0b 1776 }
853d6f7a 1777
f46e9a0b
TM		 1778 /* Ensure that the bss page(s) are valid */
1779 if ((page_get_flags(last_bss-1) & prot) != prot) {
1780 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
cf129f3a 1781 }
31e31b8a 1782
cf129f3a
RH		 1783 if (host_start < host_map_start) {
1784 memset((void *)host_start, 0, host_map_start - host_start);
1785 }
1786}
53a5960a 1787
cf58affe
CL		 1788#ifdef TARGET_ARM
1789static int elf_is_fdpic(struct elfhdr *exec)
1790{
1791 return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC;
1792}
1793#else
a99856cd
CL		 1794/* Default implementation, always false. */
1795static int elf_is_fdpic(struct elfhdr *exec)
1796{
1797 return 0;
1798}
cf58affe 1799#endif
a99856cd 1800
1af02e83
MF		 1801static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1802{
1803 uint16_t n;
1804 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1805
1806 /* elf32_fdpic_loadseg */
1807 n = info->nsegs;
1808 while (n--) {
1809 sp -= 12;
1810 put_user_u32(loadsegs[n].addr, sp+0);
1811 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1812 put_user_u32(loadsegs[n].p_memsz, sp+8);
1813 }
1814
1815 /* elf32_fdpic_loadmap */
1816 sp -= 4;
1817 put_user_u16(0, sp+0); /* version */
1818 put_user_u16(info->nsegs, sp+2); /* nsegs */
1819
1820 info->personality = PER_LINUX_FDPIC;
1821 info->loadmap_addr = sp;
1822
1823 return sp;
1824}
1af02e83 1825
992f48a0 1826static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
8e62a717
RH		 1827 struct elfhdr *exec,
1828 struct image_info *info,
1829 struct image_info *interp_info)
31e31b8a 1830{
d97ef72e 1831 abi_ulong sp;
7c4ee5bc 1832 abi_ulong u_argc, u_argv, u_envp, u_auxv;
d97ef72e 1833 int size;
14322bad
LA		 1834 int i;
1835 abi_ulong u_rand_bytes;
1836 uint8_t k_rand_bytes[16];
d97ef72e
RH		 1837 abi_ulong u_platform;
1838 const char *k_platform;
1839 const int n = sizeof(elf_addr_t);
1840
1841 sp = p;
1af02e83 1842
1af02e83
MF		 1843 /* Needs to be before we load the env/argc/... */
1844 if (elf_is_fdpic(exec)) {
1845 /* Need 4 byte alignment for these structs */
1846 sp &= ~3;
1847 sp = loader_build_fdpic_loadmap(info, sp);
1848 info->other_info = interp_info;
1849 if (interp_info) {
1850 interp_info->other_info = info;
1851 sp = loader_build_fdpic_loadmap(interp_info, sp);
3cb10cfa
CL		 1852 info->interpreter_loadmap_addr = interp_info->loadmap_addr;
1853 info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr;
1854 } else {
1855 info->interpreter_loadmap_addr = 0;
1856 info->interpreter_pt_dynamic_addr = 0;
1af02e83
MF		 1857 }
1858 }
1af02e83 1859
d97ef72e
RH		 1860 u_platform = 0;
1861 k_platform = ELF_PLATFORM;
1862 if (k_platform) {
1863 size_t len = strlen(k_platform) + 1;
7c4ee5bc
RH		 1864 if (STACK_GROWS_DOWN) {
1865 sp -= (len + n - 1) & ~(n - 1);
1866 u_platform = sp;
1867 /* FIXME - check return value of memcpy_to_target() for failure */
1868 memcpy_to_target(sp, k_platform, len);
1869 } else {
1870 memcpy_to_target(sp, k_platform, len);
1871 u_platform = sp;
1872 sp += len + 1;
1873 }
1874 }
1875
1876 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1877 * the argv and envp pointers.
1878 */
1879 if (STACK_GROWS_DOWN) {
1880 sp = QEMU_ALIGN_DOWN(sp, 16);
1881 } else {
1882 sp = QEMU_ALIGN_UP(sp, 16);
d97ef72e 1883 }
14322bad
LA		 1884
1885 /*
1886 * Generate 16 random bytes for userspace PRNG seeding (not
1887 * cryptically secure but it's not the aim of QEMU).
1888 */
14322bad
LA		 1889 for (i = 0; i < 16; i++) {
1890 k_rand_bytes[i] = rand();
1891 }
7c4ee5bc
RH		 1892 if (STACK_GROWS_DOWN) {
1893 sp -= 16;
1894 u_rand_bytes = sp;
1895 /* FIXME - check return value of memcpy_to_target() for failure */
1896 memcpy_to_target(sp, k_rand_bytes, 16);
1897 } else {
1898 memcpy_to_target(sp, k_rand_bytes, 16);
1899 u_rand_bytes = sp;
1900 sp += 16;
1901 }
14322bad 1902
d97ef72e
RH		 1903 size = (DLINFO_ITEMS + 1) * 2;
1904 if (k_platform)
1905 size += 2;
f5155289 1906#ifdef DLINFO_ARCH_ITEMS
d97ef72e 1907 size += DLINFO_ARCH_ITEMS * 2;
ad6919dc
PM		 1908#endif
1909#ifdef ELF_HWCAP2
1910 size += 2;
f5155289 1911#endif
f516511e
PM		 1912 info->auxv_len = size * n;
1913
d97ef72e 1914 size += envc + argc + 2;
b9329d4b 1915 size += 1; /* argc itself */
d97ef72e 1916 size *= n;
7c4ee5bc
RH		 1917
1918 /* Allocate space and finalize stack alignment for entry now. */
1919 if (STACK_GROWS_DOWN) {
1920 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1921 sp = u_argc;
1922 } else {
1923 u_argc = sp;
1924 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1925 }
1926
1927 u_argv = u_argc + n;
1928 u_envp = u_argv + (argc + 1) * n;
1929 u_auxv = u_envp + (envc + 1) * n;
1930 info->saved_auxv = u_auxv;
1931 info->arg_start = u_argv;
1932 info->arg_end = u_argv + argc * n;
d97ef72e
RH		 1933
1934 /* This is correct because Linux defines
1935 * elf_addr_t as Elf32_Off / Elf64_Off
1936 */
1937#define NEW_AUX_ENT(id, val) do { \
7c4ee5bc
RH		 1938 put_user_ual(id, u_auxv); u_auxv += n; \
1939 put_user_ual(val, u_auxv); u_auxv += n; \
d97ef72e
RH		 1940 } while(0)
1941
82991bed
PM		 1942#ifdef ARCH_DLINFO
1943 /*
1944 * ARCH_DLINFO must come first so platform specific code can enforce
1945 * special alignment requirements on the AUXV if necessary (eg. PPC).
1946 */
1947 ARCH_DLINFO;
1948#endif
f516511e
PM		 1949 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1950 * on info->auxv_len will trigger.
1951 */
8e62a717 1952 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
d97ef72e
RH		 1953 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1954 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
33143c44
LV		 1955 if ((info->alignment & ~qemu_host_page_mask) != 0) {
1956 /* Target doesn't support host page size alignment */
1957 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
1958 } else {
1959 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE,
1960 qemu_host_page_size)));
1961 }
8e62a717 1962 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
d97ef72e 1963 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
8e62a717 1964 NEW_AUX_ENT(AT_ENTRY, info->entry);
d97ef72e
RH		 1965 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1966 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1967 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1968 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1969 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1970 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
14322bad 1971 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
444cd5c3 1972 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
14322bad 1973
ad6919dc
PM		 1974#ifdef ELF_HWCAP2
1975 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1976#endif
1977
7c4ee5bc 1978 if (u_platform) {
d97ef72e 1979 NEW_AUX_ENT(AT_PLATFORM, u_platform);
7c4ee5bc 1980 }
7c4ee5bc 1981 NEW_AUX_ENT (AT_NULL, 0);
f5155289
FB		 1982#undef NEW_AUX_ENT
1983
f516511e
PM		 1984 /* Check that our initial calculation of the auxv length matches how much
1985 * we actually put into it.
1986 */
1987 assert(info->auxv_len == u_auxv - info->saved_auxv);
7c4ee5bc
RH		 1988
1989 put_user_ual(argc, u_argc);
1990
1991 p = info->arg_strings;
1992 for (i = 0; i < argc; ++i) {
1993 put_user_ual(p, u_argv);
1994 u_argv += n;
1995 p += target_strlen(p) + 1;
1996 }
1997 put_user_ual(0, u_argv);
1998
1999 p = info->env_strings;
2000 for (i = 0; i < envc; ++i) {
2001 put_user_ual(p, u_envp);
2002 u_envp += n;
2003 p += target_strlen(p) + 1;
2004 }
2005 put_user_ual(0, u_envp);
edf8e2af 2006
d97ef72e 2007 return sp;
31e31b8a
FB		 2008}
2009
dce10401
MI		 2010unsigned long init_guest_space(unsigned long host_start,
2011 unsigned long host_size,
2012 unsigned long guest_start,
2013 bool fixed)
2014{
293f2060 2015 unsigned long current_start, aligned_start;
dce10401
MI		 2016 int flags;
2017
2018 assert(host_start || host_size);
2019
2020 /* If just a starting address is given, then just verify that
2021 * address. */
2022 if (host_start && !host_size) {
8756e136 2023#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
c3637eaf 2024 if (init_guest_commpage(host_start, host_size) != 1) {
dce10401
MI		 2025 return (unsigned long)-1;
2026 }
8756e136
LS		 2027#endif
2028 return host_start;
dce10401
MI		 2029 }
2030
2031 /* Setup the initial flags and start address. */
2032 current_start = host_start & qemu_host_page_mask;
2033 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
2034 if (fixed) {
2035 flags |= MAP_FIXED;
2036 }
2037
2038 /* Otherwise, a non-zero size region of memory needs to be mapped
2039 * and validated. */
2a53535a
LS		 2040
2041#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
2042 /* On 32-bit ARM, we need to map not just the usable memory, but
2043 * also the commpage. Try to find a suitable place by allocating
2044 * a big chunk for all of it. If host_start, then the naive
2045 * strategy probably does good enough.
2046 */
2047 if (!host_start) {
2048 unsigned long guest_full_size, host_full_size, real_start;
2049
2050 guest_full_size =
2051 (0xffff0f00 & qemu_host_page_mask) + qemu_host_page_size;
2052 host_full_size = guest_full_size - guest_start;
2053 real_start = (unsigned long)
2054 mmap(NULL, host_full_size, PROT_NONE, flags, -1, 0);
2055 if (real_start == (unsigned long)-1) {
2056 if (host_size < host_full_size - qemu_host_page_size) {
2057 /* We failed to map a continous segment, but we're
2058 * allowed to have a gap between the usable memory and
2059 * the commpage where other things can be mapped.
2060 * This sparseness gives us more flexibility to find
2061 * an address range.
2062 */
2063 goto naive;
2064 }
2065 return (unsigned long)-1;
2066 }
2067 munmap((void *)real_start, host_full_size);
2068 if (real_start & ~qemu_host_page_mask) {
2069 /* The same thing again, but with an extra qemu_host_page_size
2070 * so that we can shift around alignment.
2071 */
2072 unsigned long real_size = host_full_size + qemu_host_page_size;
2073 real_start = (unsigned long)
2074 mmap(NULL, real_size, PROT_NONE, flags, -1, 0);
2075 if (real_start == (unsigned long)-1) {
2076 if (host_size < host_full_size - qemu_host_page_size) {
2077 goto naive;
2078 }
2079 return (unsigned long)-1;
2080 }
2081 munmap((void *)real_start, real_size);
2082 real_start = HOST_PAGE_ALIGN(real_start);
2083 }
2084 current_start = real_start;
2085 }
2086 naive:
2087#endif
2088
dce10401 2089 while (1) {
293f2060
LS		 2090 unsigned long real_start, real_size, aligned_size;
2091 aligned_size = real_size = host_size;
806d1021 2092
dce10401
MI		 2093 /* Do not use mmap_find_vma here because that is limited to the
2094 * guest address space. We are going to make the
2095 * guest address space fit whatever we're given.
2096 */
2097 real_start = (unsigned long)
2098 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
2099 if (real_start == (unsigned long)-1) {
2100 return (unsigned long)-1;
2101 }
2102
aac362e4
LS		 2103 /* Check to see if the address is valid. */
2104 if (host_start && real_start != current_start) {
2105 goto try_again;
2106 }
2107
806d1021
MI		 2108 /* Ensure the address is properly aligned. */
2109 if (real_start & ~qemu_host_page_mask) {
293f2060
LS		 2110 /* Ideally, we adjust like
2111 *
2112 * pages: [ ][ ][ ][ ][ ]
2113 * old: [ real ]
2114 * [ aligned ]
2115 * new: [ real ]
2116 * [ aligned ]
2117 *
2118 * But if there is something else mapped right after it,
2119 * then obviously it won't have room to grow, and the
2120 * kernel will put the new larger real someplace else with
2121 * unknown alignment (if we made it to here, then
2122 * fixed=false). Which is why we grow real by a full page
2123 * size, instead of by part of one; so that even if we get
2124 * moved, we can still guarantee alignment. But this does
2125 * mean that there is a padding of < 1 page both before
2126 * and after the aligned range; the "after" could could
2127 * cause problems for ARM emulation where it could butt in
2128 * to where we need to put the commpage.
2129 */
806d1021 2130 munmap((void *)real_start, host_size);
293f2060 2131 real_size = aligned_size + qemu_host_page_size;
806d1021
MI		 2132 real_start = (unsigned long)
2133 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
2134 if (real_start == (unsigned long)-1) {
2135 return (unsigned long)-1;
2136 }
293f2060
LS		 2137 aligned_start = HOST_PAGE_ALIGN(real_start);
2138 } else {
2139 aligned_start = real_start;
806d1021
MI		 2140 }
2141
8756e136 2142#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
7ad75eea
LS		 2143 /* On 32-bit ARM, we need to also be able to map the commpage. */
2144 int valid = init_guest_commpage(aligned_start - guest_start,
2145 aligned_size + guest_start);
2146 if (valid == -1) {
2147 munmap((void *)real_start, real_size);
2148 return (unsigned long)-1;
2149 } else if (valid == 0) {
2150 goto try_again;
dce10401 2151 }
7ad75eea
LS		 2152#endif
2153
2154 /* If nothing has said `return -1` or `goto try_again` yet,
2155 * then the address we have is good.
2156 */
2157 break;
dce10401 2158
7ad75eea 2159 try_again:
dce10401
MI		 2160 /* That address didn't work. Unmap and try a different one.
2161 * The address the host picked because is typically right at
2162 * the top of the host address space and leaves the guest with
2163 * no usable address space. Resort to a linear search. We
2164 * already compensated for mmap_min_addr, so this should not
2165 * happen often. Probably means we got unlucky and host
2166 * address space randomization put a shared library somewhere
2167 * inconvenient.
8c17d862
LS		 2168 *
2169 * This is probably a good strategy if host_start, but is
2170 * probably a bad strategy if not, which means we got here
2171 * because of trouble with ARM commpage setup.
dce10401 2172 */
293f2060 2173 munmap((void *)real_start, real_size);
dce10401
MI		 2174 current_start += qemu_host_page_size;
2175 if (host_start == current_start) {
2176 /* Theoretically possible if host doesn't have any suitably
2177 * aligned areas. Normally the first mmap will fail.
2178 */
2179 return (unsigned long)-1;
2180 }
2181 }
2182
13829020 2183 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
806d1021 2184
293f2060 2185 return aligned_start;
dce10401
MI		 2186}
2187
f3ed1f5d
PM		 2188static void probe_guest_base(const char *image_name,
2189 abi_ulong loaddr, abi_ulong hiaddr)
2190{
2191 /* Probe for a suitable guest base address, if the user has not set
2192 * it explicitly, and set guest_base appropriately.
2193 * In case of error we will print a suitable message and exit.
2194 */
f3ed1f5d
PM		 2195 const char *errmsg;
2196 if (!have_guest_base && !reserved_va) {
2197 unsigned long host_start, real_start, host_size;
2198
2199 /* Round addresses to page boundaries. */
2200 loaddr &= qemu_host_page_mask;
2201 hiaddr = HOST_PAGE_ALIGN(hiaddr);
2202
2203 if (loaddr < mmap_min_addr) {
2204 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
2205 } else {
2206 host_start = loaddr;
2207 if (host_start != loaddr) {
2208 errmsg = "Address overflow loading ELF binary";
2209 goto exit_errmsg;
2210 }
2211 }
2212 host_size = hiaddr - loaddr;
dce10401
MI		 2213
2214 /* Setup the initial guest memory space with ranges gleaned from
2215 * the ELF image that is being loaded.
2216 */
2217 real_start = init_guest_space(host_start, host_size, loaddr, false);
2218 if (real_start == (unsigned long)-1) {
2219 errmsg = "Unable to find space for application";
2220 goto exit_errmsg;
f3ed1f5d 2221 }
dce10401
MI		 2222 guest_base = real_start - loaddr;
2223
13829020
PB		 2224 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
2225 TARGET_ABI_FMT_lx " to 0x%lx\n",
2226 loaddr, real_start);
f3ed1f5d
PM		 2227 }
2228 return;
2229
f3ed1f5d
PM		 2230exit_errmsg:
2231 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2232 exit(-1);
f3ed1f5d
PM		 2233}
2234
2235
8e62a717 2236/* Load an ELF image into the address space.
31e31b8a 2237
8e62a717
RH		 2238 IMAGE_NAME is the filename of the image, to use in error messages.
2239 IMAGE_FD is the open file descriptor for the image.
2240
2241 BPRM_BUF is a copy of the beginning of the file; this of course
2242 contains the elf file header at offset 0. It is assumed that this
2243 buffer is sufficiently aligned to present no problems to the host
2244 in accessing data at aligned offsets within the buffer.
2245
2246 On return: INFO values will be filled in, as necessary or available. */
2247
2248static void load_elf_image(const char *image_name, int image_fd,
bf858897 2249 struct image_info *info, char **pinterp_name,
8e62a717 2250 char bprm_buf[BPRM_BUF_SIZE])
31e31b8a 2251{
8e62a717
RH		 2252 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2253 struct elf_phdr *phdr;
2254 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2255 int i, retval;
2256 const char *errmsg;
5fafdf24 2257
8e62a717
RH		 2258 /* First of all, some simple consistency checks */
2259 errmsg = "Invalid ELF image for this architecture";
2260 if (!elf_check_ident(ehdr)) {
2261 goto exit_errmsg;
2262 }
2263 bswap_ehdr(ehdr);
2264 if (!elf_check_ehdr(ehdr)) {
2265 goto exit_errmsg;
d97ef72e 2266 }
5fafdf24 2267
8e62a717
RH		 2268 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2269 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2270 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
9955ffac 2271 } else {
8e62a717
RH		 2272 phdr = (struct elf_phdr *) alloca(i);
2273 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
9955ffac 2274 if (retval != i) {
8e62a717 2275 goto exit_read;
9955ffac 2276 }
d97ef72e 2277 }
8e62a717 2278 bswap_phdr(phdr, ehdr->e_phnum);
09bfb054 2279
1af02e83
MF		 2280 info->nsegs = 0;
2281 info->pt_dynamic_addr = 0;
1af02e83 2282
98c1076c
AB		 2283 mmap_lock();
2284
682674b8
RH		 2285 /* Find the maximum size of the image and allocate an appropriate
2286 amount of memory to handle that. */
2287 loaddr = -1, hiaddr = 0;
33143c44 2288 info->alignment = 0;
8e62a717
RH		 2289 for (i = 0; i < ehdr->e_phnum; ++i) {
2290 if (phdr[i].p_type == PT_LOAD) {
a93934fe 2291 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
682674b8
RH		 2292 if (a < loaddr) {
2293 loaddr = a;
2294 }
ccf661f8 2295 a = phdr[i].p_vaddr + phdr[i].p_memsz;
682674b8
RH		 2296 if (a > hiaddr) {
2297 hiaddr = a;
2298 }
1af02e83 2299 ++info->nsegs;
33143c44 2300 info->alignment |= phdr[i].p_align;
682674b8
RH		 2301 }
2302 }
2303
2304 load_addr = loaddr;
8e62a717 2305 if (ehdr->e_type == ET_DYN) {
682674b8
RH		 2306 /* The image indicates that it can be loaded anywhere. Find a
2307 location that can hold the memory space required. If the
2308 image is pre-linked, LOADDR will be non-zero. Since we do
2309 not supply MAP_FIXED here we'll use that address if and
2310 only if it remains available. */
2311 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2312 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2313 -1, 0);
2314 if (load_addr == -1) {
8e62a717 2315 goto exit_perror;
d97ef72e 2316 }
bf858897
RH		 2317 } else if (pinterp_name != NULL) {
2318 /* This is the main executable. Make sure that the low
2319 address does not conflict with MMAP_MIN_ADDR or the
2320 QEMU application itself. */
f3ed1f5d 2321 probe_guest_base(image_name, loaddr, hiaddr);
d97ef72e 2322 }
682674b8 2323 load_bias = load_addr - loaddr;
d97ef72e 2324
a99856cd 2325 if (elf_is_fdpic(ehdr)) {
1af02e83 2326 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
7267c094 2327 g_malloc(sizeof(*loadsegs) * info->nsegs);
1af02e83
MF		 2328
2329 for (i = 0; i < ehdr->e_phnum; ++i) {
2330 switch (phdr[i].p_type) {
2331 case PT_DYNAMIC:
2332 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2333 break;
2334 case PT_LOAD:
2335 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2336 loadsegs->p_vaddr = phdr[i].p_vaddr;
2337 loadsegs->p_memsz = phdr[i].p_memsz;
2338 ++loadsegs;
2339 break;
2340 }
2341 }
2342 }
1af02e83 2343
8e62a717
RH		 2344 info->load_bias = load_bias;
2345 info->load_addr = load_addr;
2346 info->entry = ehdr->e_entry + load_bias;
2347 info->start_code = -1;
2348 info->end_code = 0;
2349 info->start_data = -1;
2350 info->end_data = 0;
2351 info->brk = 0;
d8fd2954 2352 info->elf_flags = ehdr->e_flags;
8e62a717
RH		 2353
2354 for (i = 0; i < ehdr->e_phnum; i++) {
2355 struct elf_phdr *eppnt = phdr + i;
d97ef72e 2356 if (eppnt->p_type == PT_LOAD) {
94894ff2 2357 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em, vaddr_len;
d97ef72e 2358 int elf_prot = 0;
d97ef72e
RH		 2359
2360 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2361 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2362 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
d97ef72e 2363
682674b8
RH		 2364 vaddr = load_bias + eppnt->p_vaddr;
2365 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2366 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
94894ff2 2367 vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
682674b8 2368
d87146bc
GM		 2369 /*
2370 * Some segments may be completely empty without any backing file
2371 * segment, in that case just let zero_bss allocate an empty buffer
2372 * for it.
2373 */
2374 if (eppnt->p_filesz != 0) {
2375 error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
2376 MAP_PRIVATE | MAP_FIXED,
2377 image_fd, eppnt->p_offset - vaddr_po);
2378
2379 if (error == -1) {
2380 goto exit_perror;
2381 }
09bfb054 2382 }
09bfb054 2383
682674b8
RH		 2384 vaddr_ef = vaddr + eppnt->p_filesz;
2385 vaddr_em = vaddr + eppnt->p_memsz;
31e31b8a 2386
cf129f3a 2387 /* If the load segment requests extra zeros (e.g. bss), map it. */
682674b8
RH		 2388 if (vaddr_ef < vaddr_em) {
2389 zero_bss(vaddr_ef, vaddr_em, elf_prot);
cf129f3a 2390 }
8e62a717
RH		 2391
2392 /* Find the full program boundaries. */
2393 if (elf_prot & PROT_EXEC) {
2394 if (vaddr < info->start_code) {
2395 info->start_code = vaddr;
2396 }
2397 if (vaddr_ef > info->end_code) {
2398 info->end_code = vaddr_ef;
2399 }
2400 }
2401 if (elf_prot & PROT_WRITE) {
2402 if (vaddr < info->start_data) {
2403 info->start_data = vaddr;
2404 }
2405 if (vaddr_ef > info->end_data) {
2406 info->end_data = vaddr_ef;
2407 }
2408 if (vaddr_em > info->brk) {
2409 info->brk = vaddr_em;
2410 }
2411 }
bf858897
RH		 2412 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2413 char *interp_name;
2414
2415 if (*pinterp_name) {
2416 errmsg = "Multiple PT_INTERP entries";
2417 goto exit_errmsg;
2418 }
2419 interp_name = malloc(eppnt->p_filesz);
2420 if (!interp_name) {
2421 goto exit_perror;
2422 }
2423
2424 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2425 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2426 eppnt->p_filesz);
2427 } else {
2428 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2429 eppnt->p_offset);
2430 if (retval != eppnt->p_filesz) {
2431 goto exit_perror;
2432 }
2433 }
2434 if (interp_name[eppnt->p_filesz - 1] != 0) {
2435 errmsg = "Invalid PT_INTERP entry";
2436 goto exit_errmsg;
2437 }
2438 *pinterp_name = interp_name;
5dd0db52
SM		 2439#ifdef TARGET_MIPS
2440 } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) {
2441 Mips_elf_abiflags_v0 abiflags;
2442 if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) {
2443 errmsg = "Invalid PT_MIPS_ABIFLAGS entry";
2444 goto exit_errmsg;
2445 }
2446 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2447 memcpy(&abiflags, bprm_buf + eppnt->p_offset,
2448 sizeof(Mips_elf_abiflags_v0));
2449 } else {
2450 retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0),
2451 eppnt->p_offset);
2452 if (retval != sizeof(Mips_elf_abiflags_v0)) {
2453 goto exit_perror;
2454 }
2455 }
2456 bswap_mips_abiflags(&abiflags);
c94cb6c9 2457 info->fp_abi = abiflags.fp_abi;
5dd0db52 2458#endif
d97ef72e 2459 }
682674b8 2460 }
5fafdf24 2461
8e62a717
RH		 2462 if (info->end_data == 0) {
2463 info->start_data = info->end_code;
2464 info->end_data = info->end_code;
2465 info->brk = info->end_code;
2466 }
2467
682674b8 2468 if (qemu_log_enabled()) {
8e62a717 2469 load_symbols(ehdr, image_fd, load_bias);
682674b8 2470 }
31e31b8a 2471
98c1076c
AB		 2472 mmap_unlock();
2473
8e62a717
RH		 2474 close(image_fd);
2475 return;
2476
2477 exit_read:
2478 if (retval >= 0) {
2479 errmsg = "Incomplete read of file header";
2480 goto exit_errmsg;
2481 }
2482 exit_perror:
2483 errmsg = strerror(errno);
2484 exit_errmsg:
2485 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2486 exit(-1);
2487}
2488
2489static void load_elf_interp(const char *filename, struct image_info *info,
2490 char bprm_buf[BPRM_BUF_SIZE])
2491{
2492 int fd, retval;
2493
2494 fd = open(path(filename), O_RDONLY);
2495 if (fd < 0) {
2496 goto exit_perror;
2497 }
31e31b8a 2498
8e62a717
RH		 2499 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2500 if (retval < 0) {
2501 goto exit_perror;
2502 }
2503 if (retval < BPRM_BUF_SIZE) {
2504 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2505 }
2506
bf858897 2507 load_elf_image(filename, fd, info, NULL, bprm_buf);
8e62a717
RH		 2508 return;
2509
2510 exit_perror:
2511 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2512 exit(-1);
31e31b8a
FB		 2513}
2514
49918a75
PB		 2515static int symfind(const void *s0, const void *s1)
2516{
c7c530cd 2517 target_ulong addr = *(target_ulong *)s0;
49918a75
PB		 2518 struct elf_sym *sym = (struct elf_sym *)s1;
2519 int result = 0;
c7c530cd 2520 if (addr < sym->st_value) {
49918a75 2521 result = -1;
c7c530cd 2522 } else if (addr >= sym->st_value + sym->st_size) {
49918a75
PB		 2523 result = 1;
2524 }
2525 return result;
2526}
2527
2528static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2529{
2530#if ELF_CLASS == ELFCLASS32
2531 struct elf_sym *syms = s->disas_symtab.elf32;
2532#else
2533 struct elf_sym *syms = s->disas_symtab.elf64;
2534#endif
2535
2536 // binary search
49918a75
PB		 2537 struct elf_sym *sym;
2538
c7c530cd 2539 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
7cba04f6 2540 if (sym != NULL) {
49918a75
PB		 2541 return s->disas_strtab + sym->st_name;
2542 }
2543
2544 return "";
2545}
2546
2547/* FIXME: This should use elf_ops.h */
2548static int symcmp(const void *s0, const void *s1)
2549{
2550 struct elf_sym *sym0 = (struct elf_sym *)s0;
2551 struct elf_sym *sym1 = (struct elf_sym *)s1;
2552 return (sym0->st_value < sym1->st_value)
2553 ? -1
2554 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2555}
2556
689f936f 2557/* Best attempt to load symbols from this ELF object. */
682674b8 2558static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
689f936f 2559{
682674b8 2560 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
1e06262d 2561 uint64_t segsz;
682674b8 2562 struct elf_shdr *shdr;
b9475279
CV		 2563 char *strings = NULL;
2564 struct syminfo *s = NULL;
2565 struct elf_sym *new_syms, *syms = NULL;
689f936f 2566
682674b8
RH		 2567 shnum = hdr->e_shnum;
2568 i = shnum * sizeof(struct elf_shdr);
2569 shdr = (struct elf_shdr *)alloca(i);
2570 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2571 return;
2572 }
2573
2574 bswap_shdr(shdr, shnum);
2575 for (i = 0; i < shnum; ++i) {
2576 if (shdr[i].sh_type == SHT_SYMTAB) {
2577 sym_idx = i;
2578 str_idx = shdr[i].sh_link;
49918a75
PB		 2579 goto found;
2580 }
689f936f 2581 }
682674b8
RH		 2582
2583 /* There will be no symbol table if the file was stripped. */
2584 return;
689f936f
FB		 2585
2586 found:
682674b8 2587 /* Now know where the strtab and symtab are. Snarf them. */
0ef9ea29 2588 s = g_try_new(struct syminfo, 1);
682674b8 2589 if (!s) {
b9475279 2590 goto give_up;
682674b8 2591 }
5fafdf24 2592
1e06262d
PM		 2593 segsz = shdr[str_idx].sh_size;
2594 s->disas_strtab = strings = g_try_malloc(segsz);
2595 if (!strings ||
2596 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
b9475279 2597 goto give_up;
682674b8 2598 }
49918a75 2599
1e06262d
PM		 2600 segsz = shdr[sym_idx].sh_size;
2601 syms = g_try_malloc(segsz);
2602 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
b9475279 2603 goto give_up;
682674b8 2604 }
31e31b8a 2605
1e06262d
PM		 2606 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2607 /* Implausibly large symbol table: give up rather than ploughing
2608 * on with the number of symbols calculation overflowing
2609 */
2610 goto give_up;
2611 }
2612 nsyms = segsz / sizeof(struct elf_sym);
682674b8 2613 for (i = 0; i < nsyms; ) {
49918a75 2614 bswap_sym(syms + i);
682674b8
RH		 2615 /* Throw away entries which we do not need. */
2616 if (syms[i].st_shndx == SHN_UNDEF
2617 || syms[i].st_shndx >= SHN_LORESERVE
2618 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2619 if (i < --nsyms) {
49918a75
PB		 2620 syms[i] = syms[nsyms];
2621 }
682674b8 2622 } else {
49918a75 2623#if defined(TARGET_ARM) || defined (TARGET_MIPS)
682674b8
RH		 2624 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2625 syms[i].st_value &= ~(target_ulong)1;
0774bed1 2626#endif
682674b8
RH		 2627 syms[i].st_value += load_bias;
2628 i++;
2629 }
0774bed1 2630 }
49918a75 2631
b9475279
CV		 2632 /* No "useful" symbol. */
2633 if (nsyms == 0) {
2634 goto give_up;
2635 }
2636
5d5c9930
RH		 2637 /* Attempt to free the storage associated with the local symbols
2638 that we threw away. Whether or not this has any effect on the
2639 memory allocation depends on the malloc implementation and how
2640 many symbols we managed to discard. */
0ef9ea29 2641 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
8d79de6e 2642 if (new_syms == NULL) {
b9475279 2643 goto give_up;
5d5c9930 2644 }
8d79de6e 2645 syms = new_syms;
5d5c9930 2646
49918a75 2647 qsort(syms, nsyms, sizeof(*syms), symcmp);
689f936f 2648
49918a75
PB		 2649 s->disas_num_syms = nsyms;
2650#if ELF_CLASS == ELFCLASS32
2651 s->disas_symtab.elf32 = syms;
49918a75
PB		 2652#else
2653 s->disas_symtab.elf64 = syms;
49918a75 2654#endif
682674b8 2655 s->lookup_symbol = lookup_symbolxx;
e80cfcfc
FB		 2656 s->next = syminfos;
2657 syminfos = s;
b9475279
CV		 2658
2659 return;
2660
2661give_up:
0ef9ea29
PM		 2662 g_free(s);
2663 g_free(strings);
2664 g_free(syms);
689f936f 2665}
31e31b8a 2666
768fe76e
YS		 2667uint32_t get_elf_eflags(int fd)
2668{
2669 struct elfhdr ehdr;
2670 off_t offset;
2671 int ret;
2672
2673 /* Read ELF header */
2674 offset = lseek(fd, 0, SEEK_SET);
2675 if (offset == (off_t) -1) {
2676 return 0;
2677 }
2678 ret = read(fd, &ehdr, sizeof(ehdr));
2679 if (ret < sizeof(ehdr)) {
2680 return 0;
2681 }
2682 offset = lseek(fd, offset, SEEK_SET);
2683 if (offset == (off_t) -1) {
2684 return 0;
2685 }
2686
2687 /* Check ELF signature */
2688 if (!elf_check_ident(&ehdr)) {
2689 return 0;
2690 }
2691
2692 /* check header */
2693 bswap_ehdr(&ehdr);
2694 if (!elf_check_ehdr(&ehdr)) {
2695 return 0;
2696 }
2697
2698 /* return architecture id */
2699 return ehdr.e_flags;
2700}
2701
f0116c54 2702int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
31e31b8a 2703{
8e62a717 2704 struct image_info interp_info;
31e31b8a 2705 struct elfhdr elf_ex;
8e62a717 2706 char *elf_interpreter = NULL;
59baae9a 2707 char *scratch;
31e31b8a 2708
bf858897 2709 info->start_mmap = (abi_ulong)ELF_START_MMAP;
bf858897
RH		 2710
2711 load_elf_image(bprm->filename, bprm->fd, info,
2712 &elf_interpreter, bprm->buf);
31e31b8a 2713
bf858897
RH		 2714 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2715 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2716 when we load the interpreter. */
2717 elf_ex = *(struct elfhdr *)bprm->buf;
31e31b8a 2718
59baae9a
SB		 2719 /* Do this so that we can load the interpreter, if need be. We will
2720 change some of these later */
2721 bprm->p = setup_arg_pages(bprm, info);
2722
2723 scratch = g_new0(char, TARGET_PAGE_SIZE);
7c4ee5bc
RH		 2724 if (STACK_GROWS_DOWN) {
2725 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2726 bprm->p, info->stack_limit);
2727 info->file_string = bprm->p;
2728 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2729 bprm->p, info->stack_limit);
2730 info->env_strings = bprm->p;
2731 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2732 bprm->p, info->stack_limit);
2733 info->arg_strings = bprm->p;
2734 } else {
2735 info->arg_strings = bprm->p;
2736 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2737 bprm->p, info->stack_limit);
2738 info->env_strings = bprm->p;
2739 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2740 bprm->p, info->stack_limit);
2741 info->file_string = bprm->p;
2742 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2743 bprm->p, info->stack_limit);
2744 }
2745
59baae9a
SB		 2746 g_free(scratch);
2747
e5fe0c52 2748 if (!bprm->p) {
bf858897
RH		 2749 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2750 exit(-1);
379f6698 2751 }
379f6698 2752
8e62a717
RH		 2753 if (elf_interpreter) {
2754 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
31e31b8a 2755
8e62a717
RH		 2756 /* If the program interpreter is one of these two, then assume
2757 an iBCS2 image. Otherwise assume a native linux image. */
2758
2759 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2760 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2761 info->personality = PER_SVR4;
31e31b8a 2762
8e62a717
RH		 2763 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2764 and some applications "depend" upon this behavior. Since
2765 we do not have the power to recompile these, we emulate
2766 the SVr4 behavior. Sigh. */
2767 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
68754b44 2768 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
8e62a717 2769 }
c94cb6c9
SM		 2770#ifdef TARGET_MIPS
2771 info->interp_fp_abi = interp_info.fp_abi;
2772#endif
31e31b8a
FB		 2773 }
2774
8e62a717
RH		 2775 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2776 info, (elf_interpreter ? &interp_info : NULL));
2777 info->start_stack = bprm->p;
2778
2779 /* If we have an interpreter, set that as the program's entry point.
8e78064e 2780 Copy the load_bias as well, to help PPC64 interpret the entry
8e62a717
RH		 2781 point as a function descriptor. Do this after creating elf tables
2782 so that we copy the original program entry point into the AUXV. */
2783 if (elf_interpreter) {
8e78064e 2784 info->load_bias = interp_info.load_bias;
8e62a717 2785 info->entry = interp_info.entry;
bf858897 2786 free(elf_interpreter);
8e62a717 2787 }
31e31b8a 2788
edf8e2af
MW		 2789#ifdef USE_ELF_CORE_DUMP
2790 bprm->core_dump = &elf_core_dump;
2791#endif
2792
31e31b8a
FB		 2793 return 0;
2794}
2795
edf8e2af 2796#ifdef USE_ELF_CORE_DUMP
edf8e2af
MW		 2797/*
2798 * Definitions to generate Intel SVR4-like core files.
a2547a13 2799 * These mostly have the same names as the SVR4 types with "target_elf_"
edf8e2af
MW		 2800 * tacked on the front to prevent clashes with linux definitions,
2801 * and the typedef forms have been avoided. This is mostly like
2802 * the SVR4 structure, but more Linuxy, with things that Linux does
2803 * not support and which gdb doesn't really use excluded.
2804 *
2805 * Fields we don't dump (their contents is zero) in linux-user qemu
2806 * are marked with XXX.
2807 *
2808 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2809 *
2810 * Porting ELF coredump for target is (quite) simple process. First you
dd0a3651 2811 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
edf8e2af
MW		 2812 * the target resides):
2813 *
2814 * #define USE_ELF_CORE_DUMP
2815 *
2816 * Next you define type of register set used for dumping. ELF specification
2817 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2818 *
c227f099 2819 * typedef <target_regtype> target_elf_greg_t;
edf8e2af 2820 * #define ELF_NREG <number of registers>
c227f099 2821 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
edf8e2af 2822 *
edf8e2af
MW		 2823 * Last step is to implement target specific function that copies registers
2824 * from given cpu into just specified register set. Prototype is:
2825 *
c227f099 2826 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
9349b4f9 2827 * const CPUArchState *env);
edf8e2af
MW		 2828 *
2829 * Parameters:
2830 * regs - copy register values into here (allocated and zeroed by caller)
2831 * env - copy registers from here
2832 *
2833 * Example for ARM target is provided in this file.
2834 */
2835
2836/* An ELF note in memory */
2837struct memelfnote {
2838 const char *name;
2839 size_t namesz;
2840 size_t namesz_rounded;
2841 int type;
2842 size_t datasz;
80f5ce75 2843 size_t datasz_rounded;
edf8e2af
MW		 2844 void *data;
2845 size_t notesz;
2846};
2847
a2547a13 2848struct target_elf_siginfo {
f8fd4fc4
PB		 2849 abi_int si_signo; /* signal number */
2850 abi_int si_code; /* extra code */
2851 abi_int si_errno; /* errno */
edf8e2af
MW		 2852};
2853
a2547a13
LD		 2854struct target_elf_prstatus {
2855 struct target_elf_siginfo pr_info; /* Info associated with signal */
1ddd592f 2856 abi_short pr_cursig; /* Current signal */
ca98ac83
PB		 2857 abi_ulong pr_sigpend; /* XXX */
2858 abi_ulong pr_sighold; /* XXX */
c227f099
AL		 2859 target_pid_t pr_pid;
2860 target_pid_t pr_ppid;
2861 target_pid_t pr_pgrp;
2862 target_pid_t pr_sid;
edf8e2af
MW		 2863 struct target_timeval pr_utime; /* XXX User time */
2864 struct target_timeval pr_stime; /* XXX System time */
2865 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2866 struct target_timeval pr_cstime; /* XXX Cumulative system time */
c227f099 2867 target_elf_gregset_t pr_reg; /* GP registers */
f8fd4fc4 2868 abi_int pr_fpvalid; /* XXX */
edf8e2af
MW		 2869};
2870
2871#define ELF_PRARGSZ (80) /* Number of chars for args */
2872
a2547a13 2873struct target_elf_prpsinfo {
edf8e2af
MW		 2874 char pr_state; /* numeric process state */
2875 char pr_sname; /* char for pr_state */
2876 char pr_zomb; /* zombie */
2877 char pr_nice; /* nice val */
ca98ac83 2878 abi_ulong pr_flag; /* flags */
c227f099
AL		 2879 target_uid_t pr_uid;
2880 target_gid_t pr_gid;
2881 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
edf8e2af 2882 /* Lots missing */
d7eb2b92 2883 char pr_fname[16] QEMU_NONSTRING; /* filename of executable */
edf8e2af
MW		 2884 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2885};
2886
2887/* Here is the structure in which status of each thread is captured. */
2888struct elf_thread_status {
72cf2d4f 2889 QTAILQ_ENTRY(elf_thread_status) ets_link;
a2547a13 2890 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
edf8e2af
MW		 2891#if 0
2892 elf_fpregset_t fpu; /* NT_PRFPREG */
2893 struct task_struct *thread;
2894 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2895#endif
2896 struct memelfnote notes[1];
2897 int num_notes;
2898};
2899
2900struct elf_note_info {
2901 struct memelfnote *notes;
a2547a13
LD		 2902 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2903 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
edf8e2af 2904
b58deb34 2905 QTAILQ_HEAD(, elf_thread_status) thread_list;
edf8e2af
MW		 2906#if 0
2907 /*
2908 * Current version of ELF coredump doesn't support
2909 * dumping fp regs etc.
2910 */
2911 elf_fpregset_t *fpu;
2912 elf_fpxregset_t *xfpu;
2913 int thread_status_size;
2914#endif
2915 int notes_size;
2916 int numnote;
2917};
2918
2919struct vm_area_struct {
1a1c4db9
MI		 2920 target_ulong vma_start; /* start vaddr of memory region */
2921 target_ulong vma_end; /* end vaddr of memory region */
2922 abi_ulong vma_flags; /* protection etc. flags for the region */
72cf2d4f 2923 QTAILQ_ENTRY(vm_area_struct) vma_link;
edf8e2af
MW		 2924};
2925
2926struct mm_struct {
72cf2d4f 2927 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
edf8e2af
MW		 2928 int mm_count; /* number of mappings */
2929};
2930
2931static struct mm_struct *vma_init(void);
2932static void vma_delete(struct mm_struct *);
1a1c4db9
MI		 2933static int vma_add_mapping(struct mm_struct *, target_ulong,
2934 target_ulong, abi_ulong);
edf8e2af
MW		 2935static int vma_get_mapping_count(const struct mm_struct *);
2936static struct vm_area_struct *vma_first(const struct mm_struct *);
2937static struct vm_area_struct *vma_next(struct vm_area_struct *);
2938static abi_ulong vma_dump_size(const struct vm_area_struct *);
1a1c4db9 2939static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 2940 unsigned long flags);
edf8e2af
MW		 2941
2942static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2943static void fill_note(struct memelfnote *, const char *, int,
d97ef72e 2944 unsigned int, void *);
a2547a13
LD		 2945static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2946static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
edf8e2af
MW		 2947static void fill_auxv_note(struct memelfnote *, const TaskState *);
2948static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2949static size_t note_size(const struct memelfnote *);
2950static void free_note_info(struct elf_note_info *);
9349b4f9
AF		 2951static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2952static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
edf8e2af
MW		 2953static int core_dump_filename(const TaskState *, char *, size_t);
2954
2955static int dump_write(int, const void *, size_t);
2956static int write_note(struct memelfnote *, int);
2957static int write_note_info(struct elf_note_info *, int);
2958
2959#ifdef BSWAP_NEEDED
a2547a13 2960static void bswap_prstatus(struct target_elf_prstatus *prstatus)
edf8e2af 2961{
ca98ac83
PB		 2962 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2963 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2964 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
edf8e2af 2965 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
ca98ac83
PB		 2966 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2967 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
edf8e2af
MW		 2968 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2969 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2970 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2971 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2972 /* cpu times are not filled, so we skip them */
2973 /* regs should be in correct format already */
2974 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2975}
2976
a2547a13 2977static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
edf8e2af 2978{
ca98ac83 2979 psinfo->pr_flag = tswapal(psinfo->pr_flag);
edf8e2af
MW		 2980 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2981 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2982 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2983 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2984 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2985 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2986}
991f8f0c
RH		 2987
2988static void bswap_note(struct elf_note *en)
2989{
2990 bswap32s(&en->n_namesz);
2991 bswap32s(&en->n_descsz);
2992 bswap32s(&en->n_type);
2993}
2994#else
2995static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2996static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2997static inline void bswap_note(struct elf_note *en) { }
edf8e2af
MW		 2998#endif /* BSWAP_NEEDED */
2999
3000/*
3001 * Minimal support for linux memory regions. These are needed
3002 * when we are finding out what memory exactly belongs to
3003 * emulated process. No locks needed here, as long as
3004 * thread that received the signal is stopped.
3005 */
3006
3007static struct mm_struct *vma_init(void)
3008{
3009 struct mm_struct *mm;
3010
7267c094 3011 if ((mm = g_malloc(sizeof (*mm))) == NULL)
edf8e2af
MW		 3012 return (NULL);
3013
3014 mm->mm_count = 0;
72cf2d4f 3015 QTAILQ_INIT(&mm->mm_mmap);
edf8e2af
MW		 3016
3017 return (mm);
3018}
3019
3020static void vma_delete(struct mm_struct *mm)
3021{
3022 struct vm_area_struct *vma;
3023
3024 while ((vma = vma_first(mm)) != NULL) {
72cf2d4f 3025 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
7267c094 3026 g_free(vma);
edf8e2af 3027 }
7267c094 3028 g_free(mm);
edf8e2af
MW		 3029}
3030
1a1c4db9
MI		 3031static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
3032 target_ulong end, abi_ulong flags)
edf8e2af
MW		 3033{
3034 struct vm_area_struct *vma;
3035
7267c094 3036 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
edf8e2af
MW		 3037 return (-1);
3038
3039 vma->vma_start = start;
3040 vma->vma_end = end;
3041 vma->vma_flags = flags;
3042
72cf2d4f 3043 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
edf8e2af
MW		 3044 mm->mm_count++;
3045
3046 return (0);
3047}
3048
3049static struct vm_area_struct *vma_first(const struct mm_struct *mm)
3050{
72cf2d4f 3051 return (QTAILQ_FIRST(&mm->mm_mmap));
edf8e2af
MW		 3052}
3053
3054static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
3055{
72cf2d4f 3056 return (QTAILQ_NEXT(vma, vma_link));
edf8e2af
MW		 3057}
3058
3059static int vma_get_mapping_count(const struct mm_struct *mm)
3060{
3061 return (mm->mm_count);
3062}
3063
3064/*
3065 * Calculate file (dump) size of given memory region.
3066 */
3067static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
3068{
3069 /* if we cannot even read the first page, skip it */
3070 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
3071 return (0);
3072
3073 /*
3074 * Usually we don't dump executable pages as they contain
3075 * non-writable code that debugger can read directly from
3076 * target library etc. However, thread stacks are marked
3077 * also executable so we read in first page of given region
3078 * and check whether it contains elf header. If there is
3079 * no elf header, we dump it.
3080 */
3081 if (vma->vma_flags & PROT_EXEC) {
3082 char page[TARGET_PAGE_SIZE];
3083
3084 copy_from_user(page, vma->vma_start, sizeof (page));
3085 if ((page[EI_MAG0] == ELFMAG0) &&
3086 (page[EI_MAG1] == ELFMAG1) &&
3087 (page[EI_MAG2] == ELFMAG2) &&
3088 (page[EI_MAG3] == ELFMAG3)) {
3089 /*
3090 * Mappings are possibly from ELF binary. Don't dump
3091 * them.
3092 */
3093 return (0);
3094 }
3095 }
3096
3097 return (vma->vma_end - vma->vma_start);
3098}
3099
1a1c4db9 3100static int vma_walker(void *priv, target_ulong start, target_ulong end,
d97ef72e 3101 unsigned long flags)
edf8e2af
MW		 3102{
3103 struct mm_struct *mm = (struct mm_struct *)priv;
3104
edf8e2af
MW		 3105 vma_add_mapping(mm, start, end, flags);
3106 return (0);
3107}
3108
3109static void fill_note(struct memelfnote *note, const char *name, int type,
d97ef72e 3110 unsigned int sz, void *data)
edf8e2af
MW		 3111{
3112 unsigned int namesz;
3113
3114 namesz = strlen(name) + 1;
3115 note->name = name;
3116 note->namesz = namesz;
3117 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
3118 note->type = type;
80f5ce75
LV		 3119 note->datasz = sz;
3120 note->datasz_rounded = roundup(sz, sizeof (int32_t));
3121
edf8e2af
MW		 3122 note->data = data;
3123
3124 /*
3125 * We calculate rounded up note size here as specified by
3126 * ELF document.
3127 */
3128 note->notesz = sizeof (struct elf_note) +
80f5ce75 3129 note->namesz_rounded + note->datasz_rounded;
edf8e2af
MW		 3130}
3131
3132static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
d97ef72e 3133 uint32_t flags)
edf8e2af
MW		 3134{
3135 (void) memset(elf, 0, sizeof(*elf));
3136
3137 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
3138 elf->e_ident[EI_CLASS] = ELF_CLASS;
3139 elf->e_ident[EI_DATA] = ELF_DATA;
3140 elf->e_ident[EI_VERSION] = EV_CURRENT;
3141 elf->e_ident[EI_OSABI] = ELF_OSABI;
3142
3143 elf->e_type = ET_CORE;
3144 elf->e_machine = machine;
3145 elf->e_version = EV_CURRENT;
3146 elf->e_phoff = sizeof(struct elfhdr);
3147 elf->e_flags = flags;
3148 elf->e_ehsize = sizeof(struct elfhdr);
3149 elf->e_phentsize = sizeof(struct elf_phdr);
3150 elf->e_phnum = segs;
3151
edf8e2af 3152 bswap_ehdr(elf);
edf8e2af
MW		 3153}
3154
3155static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
3156{
3157 phdr->p_type = PT_NOTE;
3158 phdr->p_offset = offset;
3159 phdr->p_vaddr = 0;
3160 phdr->p_paddr = 0;
3161 phdr->p_filesz = sz;
3162 phdr->p_memsz = 0;
3163 phdr->p_flags = 0;
3164 phdr->p_align = 0;
3165
991f8f0c 3166 bswap_phdr(phdr, 1);
edf8e2af
MW		 3167}
3168
3169static size_t note_size(const struct memelfnote *note)
3170{
3171 return (note->notesz);
3172}
3173
a2547a13 3174static void fill_prstatus(struct target_elf_prstatus *prstatus,
d97ef72e 3175 const TaskState *ts, int signr)
edf8e2af
MW		 3176{
3177 (void) memset(prstatus, 0, sizeof (*prstatus));
3178 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3179 prstatus->pr_pid = ts->ts_tid;
3180 prstatus->pr_ppid = getppid();
3181 prstatus->pr_pgrp = getpgrp();
3182 prstatus->pr_sid = getsid(0);
3183
edf8e2af 3184 bswap_prstatus(prstatus);
edf8e2af
MW		 3185}
3186
a2547a13 3187static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
edf8e2af 3188{
900cfbca 3189 char *base_filename;
edf8e2af
MW		 3190 unsigned int i, len;
3191
3192 (void) memset(psinfo, 0, sizeof (*psinfo));
3193
3194 len = ts->info->arg_end - ts->info->arg_start;
3195 if (len >= ELF_PRARGSZ)
3196 len = ELF_PRARGSZ - 1;
3197 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
3198 return -EFAULT;
3199 for (i = 0; i < len; i++)
3200 if (psinfo->pr_psargs[i] == 0)
3201 psinfo->pr_psargs[i] = ' ';
3202 psinfo->pr_psargs[len] = 0;
3203
3204 psinfo->pr_pid = getpid();
3205 psinfo->pr_ppid = getppid();
3206 psinfo->pr_pgrp = getpgrp();
3207 psinfo->pr_sid = getsid(0);
3208 psinfo->pr_uid = getuid();
3209 psinfo->pr_gid = getgid();
3210
900cfbca
JM		 3211 base_filename = g_path_get_basename(ts->bprm->filename);
3212 /*
3213 * Using strncpy here is fine: at max-length,
3214 * this field is not NUL-terminated.
3215 */
edf8e2af 3216 (void) strncpy(psinfo->pr_fname, base_filename,
d97ef72e 3217 sizeof(psinfo->pr_fname));
edf8e2af 3218
900cfbca 3219 g_free(base_filename);
edf8e2af 3220 bswap_psinfo(psinfo);
edf8e2af
MW		 3221 return (0);
3222}
3223
3224static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3225{
3226 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3227 elf_addr_t orig_auxv = auxv;
edf8e2af 3228 void *ptr;
125b0f55 3229 int len = ts->info->auxv_len;
edf8e2af
MW		 3230
3231 /*
3232 * Auxiliary vector is stored in target process stack. It contains
3233 * {type, value} pairs that we need to dump into note. This is not
3234 * strictly necessary but we do it here for sake of completeness.
3235 */
3236
edf8e2af
MW		 3237 /* read in whole auxv vector and copy it to memelfnote */
3238 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3239 if (ptr != NULL) {
3240 fill_note(note, "CORE", NT_AUXV, len, ptr);
3241 unlock_user(ptr, auxv, len);
3242 }
3243}
3244
3245/*
3246 * Constructs name of coredump file. We have following convention
3247 * for the name:
3248 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3249 *
3250 * Returns 0 in case of success, -1 otherwise (errno is set).
3251 */
3252static int core_dump_filename(const TaskState *ts, char *buf,
d97ef72e 3253 size_t bufsize)
edf8e2af
MW		 3254{
3255 char timestamp[64];
edf8e2af
MW		 3256 char *base_filename = NULL;
3257 struct timeval tv;
3258 struct tm tm;
3259
3260 assert(bufsize >= PATH_MAX);
3261
3262 if (gettimeofday(&tv, NULL) < 0) {
3263 (void) fprintf(stderr, "unable to get current timestamp: %s",
d97ef72e 3264 strerror(errno));
edf8e2af
MW		 3265 return (-1);
3266 }
3267
b8da57fa 3268 base_filename = g_path_get_basename(ts->bprm->filename);
edf8e2af 3269 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
d97ef72e 3270 localtime_r(&tv.tv_sec, &tm));
edf8e2af 3271 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
d97ef72e 3272 base_filename, timestamp, (int)getpid());
b8da57fa 3273 g_free(base_filename);
edf8e2af
MW		 3274
3275 return (0);
3276}
3277
3278static int dump_write(int fd, const void *ptr, size_t size)
3279{
3280 const char *bufp = (const char *)ptr;
3281 ssize_t bytes_written, bytes_left;
3282 struct rlimit dumpsize;
3283 off_t pos;
3284
3285 bytes_written = 0;
3286 getrlimit(RLIMIT_CORE, &dumpsize);
3287 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3288 if (errno == ESPIPE) { /* not a seekable stream */
3289 bytes_left = size;
3290 } else {
3291 return pos;
3292 }
3293 } else {
3294 if (dumpsize.rlim_cur <= pos) {
3295 return -1;
3296 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3297 bytes_left = size;
3298 } else {
3299 size_t limit_left=dumpsize.rlim_cur - pos;
3300 bytes_left = limit_left >= size ? size : limit_left ;
3301 }
3302 }
3303
3304 /*
3305 * In normal conditions, single write(2) should do but
3306 * in case of socket etc. this mechanism is more portable.
3307 */
3308 do {
3309 bytes_written = write(fd, bufp, bytes_left);
3310 if (bytes_written < 0) {
3311 if (errno == EINTR)
3312 continue;
3313 return (-1);
3314 } else if (bytes_written == 0) { /* eof */
3315 return (-1);
3316 }
3317 bufp += bytes_written;
3318 bytes_left -= bytes_written;
3319 } while (bytes_left > 0);
3320
3321 return (0);
3322}
3323
3324static int write_note(struct memelfnote *men, int fd)
3325{
3326 struct elf_note en;
3327
3328 en.n_namesz = men->namesz;
3329 en.n_type = men->type;
3330 en.n_descsz = men->datasz;
3331
edf8e2af 3332 bswap_note(&en);
edf8e2af
MW		 3333
3334 if (dump_write(fd, &en, sizeof(en)) != 0)
3335 return (-1);
3336 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3337 return (-1);
80f5ce75 3338 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
edf8e2af
MW		 3339 return (-1);
3340
3341 return (0);
3342}
3343
9349b4f9 3344static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
edf8e2af 3345{
0429a971
AF		 3346 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3347 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3348 struct elf_thread_status *ets;
3349
7267c094 3350 ets = g_malloc0(sizeof (*ets));
edf8e2af
MW		 3351 ets->num_notes = 1; /* only prstatus is dumped */
3352 fill_prstatus(&ets->prstatus, ts, 0);
3353 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3354 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
d97ef72e 3355 &ets->prstatus);
edf8e2af 3356
72cf2d4f 3357 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
edf8e2af
MW		 3358
3359 info->notes_size += note_size(&ets->notes[0]);
3360}
3361
6afafa86
PM		 3362static void init_note_info(struct elf_note_info *info)
3363{
3364 /* Initialize the elf_note_info structure so that it is at
3365 * least safe to call free_note_info() on it. Must be
3366 * called before calling fill_note_info().
3367 */
3368 memset(info, 0, sizeof (*info));
3369 QTAILQ_INIT(&info->thread_list);
3370}
3371
edf8e2af 3372static int fill_note_info(struct elf_note_info *info,
9349b4f9 3373 long signr, const CPUArchState *env)
edf8e2af
MW		 3374{
3375#define NUMNOTES 3
0429a971
AF		 3376 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3377 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af
MW		 3378 int i;
3379
c78d65e8 3380 info->notes = g_new0(struct memelfnote, NUMNOTES);
edf8e2af
MW		 3381 if (info->notes == NULL)
3382 return (-ENOMEM);
7267c094 3383 info->prstatus = g_malloc0(sizeof (*info->prstatus));
edf8e2af
MW		 3384 if (info->prstatus == NULL)
3385 return (-ENOMEM);
7267c094 3386 info->psinfo = g_malloc0(sizeof (*info->psinfo));
edf8e2af
MW		 3387 if (info->prstatus == NULL)
3388 return (-ENOMEM);
3389
3390 /*
3391 * First fill in status (and registers) of current thread
3392 * including process info & aux vector.
3393 */
3394 fill_prstatus(info->prstatus, ts, signr);
3395 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3396 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
d97ef72e 3397 sizeof (*info->prstatus), info->prstatus);
edf8e2af
MW		 3398 fill_psinfo(info->psinfo, ts);
3399 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
d97ef72e 3400 sizeof (*info->psinfo), info->psinfo);
edf8e2af
MW		 3401 fill_auxv_note(&info->notes[2], ts);
3402 info->numnote = 3;
3403
3404 info->notes_size = 0;
3405 for (i = 0; i < info->numnote; i++)
3406 info->notes_size += note_size(&info->notes[i]);
3407
3408 /* read and fill status of all threads */
3409 cpu_list_lock();
bdc44640 3410 CPU_FOREACH(cpu) {
a2247f8e 3411 if (cpu == thread_cpu) {
edf8e2af 3412 continue;
182735ef
AF		 3413 }
3414 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
edf8e2af
MW		 3415 }
3416 cpu_list_unlock();
3417
3418 return (0);
3419}
3420
3421static void free_note_info(struct elf_note_info *info)
3422{
3423 struct elf_thread_status *ets;
3424
72cf2d4f
BS		 3425 while (!QTAILQ_EMPTY(&info->thread_list)) {
3426 ets = QTAILQ_FIRST(&info->thread_list);
3427 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
7267c094 3428 g_free(ets);
edf8e2af
MW		 3429 }
3430
7267c094
AL		 3431 g_free(info->prstatus);
3432 g_free(info->psinfo);
3433 g_free(info->notes);
edf8e2af
MW		 3434}
3435
3436static int write_note_info(struct elf_note_info *info, int fd)
3437{
3438 struct elf_thread_status *ets;
3439 int i, error = 0;
3440
3441 /* write prstatus, psinfo and auxv for current thread */
3442 for (i = 0; i < info->numnote; i++)
3443 if ((error = write_note(&info->notes[i], fd)) != 0)
3444 return (error);
3445
3446 /* write prstatus for each thread */
52a53afe 3447 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
edf8e2af
MW		 3448 if ((error = write_note(&ets->notes[0], fd)) != 0)
3449 return (error);
3450 }
3451
3452 return (0);
3453}
3454
3455/*
3456 * Write out ELF coredump.
3457 *
3458 * See documentation of ELF object file format in:
3459 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3460 *
3461 * Coredump format in linux is following:
3462 *
3463 * 0 +----------------------+ \
3464 * | ELF header | ET_CORE |
3465 * +----------------------+ |
3466 * | ELF program headers | |--- headers
3467 * | - NOTE section | |
3468 * | - PT_LOAD sections | |
3469 * +----------------------+ /
3470 * | NOTEs: |
3471 * | - NT_PRSTATUS |
3472 * | - NT_PRSINFO |
3473 * | - NT_AUXV |
3474 * +----------------------+ <-- aligned to target page
3475 * | Process memory dump |
3476 * : :
3477 * . .
3478 * : :
3479 * | |
3480 * +----------------------+
3481 *
3482 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3483 * NT_PRSINFO -> struct elf_prpsinfo
3484 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3485 *
3486 * Format follows System V format as close as possible. Current
3487 * version limitations are as follows:
3488 * - no floating point registers are dumped
3489 *
3490 * Function returns 0 in case of success, negative errno otherwise.
3491 *
3492 * TODO: make this work also during runtime: it should be
3493 * possible to force coredump from running process and then
3494 * continue processing. For example qemu could set up SIGUSR2
3495 * handler (provided that target process haven't registered
3496 * handler for that) that does the dump when signal is received.
3497 */
9349b4f9 3498static int elf_core_dump(int signr, const CPUArchState *env)
edf8e2af 3499{
0429a971
AF		 3500 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3501 const TaskState *ts = (const TaskState *)cpu->opaque;
edf8e2af
MW		 3502 struct vm_area_struct *vma = NULL;
3503 char corefile[PATH_MAX];
3504 struct elf_note_info info;
3505 struct elfhdr elf;
3506 struct elf_phdr phdr;
3507 struct rlimit dumpsize;
3508 struct mm_struct *mm = NULL;
3509 off_t offset = 0, data_offset = 0;
3510 int segs = 0;
3511 int fd = -1;
3512
6afafa86
PM		 3513 init_note_info(&info);
3514
edf8e2af
MW		 3515 errno = 0;
3516 getrlimit(RLIMIT_CORE, &dumpsize);
3517 if (dumpsize.rlim_cur == 0)
d97ef72e 3518 return 0;
edf8e2af
MW		 3519
3520 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3521 return (-errno);
3522
3523 if ((fd = open(corefile, O_WRONLY | O_CREAT,
d97ef72e 3524 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
edf8e2af
MW		 3525 return (-errno);
3526
3527 /*
3528 * Walk through target process memory mappings and
3529 * set up structure containing this information. After
3530 * this point vma_xxx functions can be used.
3531 */
3532 if ((mm = vma_init()) == NULL)
3533 goto out;
3534
3535 walk_memory_regions(mm, vma_walker);
3536 segs = vma_get_mapping_count(mm);
3537
3538 /*
3539 * Construct valid coredump ELF header. We also
3540 * add one more segment for notes.
3541 */
3542 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3543 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3544 goto out;
3545
b6af0975 3546 /* fill in the in-memory version of notes */
edf8e2af
MW		 3547 if (fill_note_info(&info, signr, env) < 0)
3548 goto out;
3549
3550 offset += sizeof (elf); /* elf header */
3551 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3552
3553 /* write out notes program header */
3554 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3555
3556 offset += info.notes_size;
3557 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3558 goto out;
3559
3560 /*
3561 * ELF specification wants data to start at page boundary so
3562 * we align it here.
3563 */
80f5ce75 3564 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
edf8e2af
MW		 3565
3566 /*
3567 * Write program headers for memory regions mapped in
3568 * the target process.
3569 */
3570 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3571 (void) memset(&phdr, 0, sizeof (phdr));
3572
3573 phdr.p_type = PT_LOAD;
3574 phdr.p_offset = offset;
3575 phdr.p_vaddr = vma->vma_start;
3576 phdr.p_paddr = 0;
3577 phdr.p_filesz = vma_dump_size(vma);
3578 offset += phdr.p_filesz;
3579 phdr.p_memsz = vma->vma_end - vma->vma_start;
3580 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3581 if (vma->vma_flags & PROT_WRITE)
3582 phdr.p_flags |= PF_W;
3583 if (vma->vma_flags & PROT_EXEC)
3584 phdr.p_flags |= PF_X;
3585 phdr.p_align = ELF_EXEC_PAGESIZE;
3586
80f5ce75 3587 bswap_phdr(&phdr, 1);
772034b6
PM		 3588 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3589 goto out;
3590 }
edf8e2af
MW		 3591 }
3592
3593 /*
3594 * Next we write notes just after program headers. No
3595 * alignment needed here.
3596 */
3597 if (write_note_info(&info, fd) < 0)
3598 goto out;
3599
3600 /* align data to page boundary */
edf8e2af
MW		 3601 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3602 goto out;
3603
3604 /*
3605 * Finally we can dump process memory into corefile as well.
3606 */
3607 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3608 abi_ulong addr;
3609 abi_ulong end;
3610
3611 end = vma->vma_start + vma_dump_size(vma);
3612
3613 for (addr = vma->vma_start; addr < end;
d97ef72e 3614 addr += TARGET_PAGE_SIZE) {
edf8e2af
MW		 3615 char page[TARGET_PAGE_SIZE];
3616 int error;
3617
3618 /*
3619 * Read in page from target process memory and
3620 * write it to coredump file.
3621 */
3622 error = copy_from_user(page, addr, sizeof (page));
3623 if (error != 0) {
49995e17 3624 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
d97ef72e 3625 addr);
edf8e2af
MW		 3626 errno = -error;
3627 goto out;
3628 }
3629 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3630 goto out;
3631 }
3632 }
3633
d97ef72e 3634 out:
edf8e2af
MW		 3635 free_note_info(&info);
3636 if (mm != NULL)
3637 vma_delete(mm);
3638 (void) close(fd);
3639
3640 if (errno != 0)
3641 return (-errno);
3642 return (0);
3643}
edf8e2af
MW		 3644#endif /* USE_ELF_CORE_DUMP */
3645
e5fe0c52
PB		 3646void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3647{
3648 init_thread(regs, infop);
3649}
Mirror of https://git.qemu.org/git/qemu.git