1
2 /*--------------------------------------------------------------------*/
3 /*--- Dumping core. coredump-elf.c ---*/
4 /*--------------------------------------------------------------------*/
5
6 /*
7 This file is part of Valgrind, a dynamic binary instrumentation
8 framework.
9
10 Copyright (C) 2000-2012 Julian Seward
11 jseward@acm.org
12
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of the
16 License, or (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 02111-1307, USA.
27
28 The GNU General Public License is contained in the file COPYING.
29 */
30
31 #if defined(VGO_linux)
32
33 #include "pub_core_basics.h"
34 #include "pub_core_vki.h"
35 #include "pub_core_aspacehl.h"
36 #include "pub_core_aspacemgr.h"
37 #include "pub_core_libcbase.h"
38 #include "pub_core_machine.h"
39 #include "pub_core_coredump.h"
40 #include "pub_core_libcprint.h"
41 #include "pub_core_libcfile.h" // VG_(close) et al
42 #include "pub_core_libcproc.h" // VG_(geteuid), VG_(getegid)
43 #include "pub_core_libcassert.h" // VG_(exit), vg_assert
44 #include "pub_core_mallocfree.h" // VG_(malloc), VG_(free)
45 #include "pub_core_libcsetjmp.h" // to keep _threadstate.h happy
46 #include "pub_core_threadstate.h"
47 #include "pub_core_xarray.h"
48 #include "pub_core_clientstate.h"
49 #include "pub_core_options.h"
50
51 /*
52 Dump core
53
54 Generate a standard ELF core file corresponding to the client state
55 at the time of a crash.
56 */
57 #include <elf.h>
58 #ifndef NT_PRXFPREG
59 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
60 #endif /* NT_PRXFPREG */
61
62 #if VG_WORDSIZE == 8
63 #define ESZ(x) Elf64_##x
64 #elif VG_WORDSIZE == 4
65 #define ESZ(x) Elf32_##x
66 #else
67 #error VG_WORDSIZE needs to ==4 or ==8
68 #endif
69
70 /* If true, then this Segment may be mentioned in the core */
may_dump(const NSegment * seg)71 static Bool may_dump(const NSegment *seg)
72 {
73 if (seg->kind == SkAnonC ||
74 seg->kind == SkShmC ||
75 (seg->kind == SkFileC &&
76 !VKI_S_ISCHR(seg->mode) && !VKI_S_ISBLK(seg->mode)))
77 return True;
78
79 return False;
80 }
81
82 /* If true, then this Segment's contents will be in the core */
should_dump(const NSegment * seg)83 static Bool should_dump(const NSegment *seg)
84 {
85 return may_dump(seg); // && seg->hasW;
86 }
87
fill_ehdr(ESZ (Ehdr)* ehdr,Int num_phdrs)88 static void fill_ehdr(ESZ(Ehdr) *ehdr, Int num_phdrs)
89 {
90 VG_(memset)(ehdr, 0, sizeof(*ehdr));
91
92 VG_(memcpy)(ehdr->e_ident, ELFMAG, SELFMAG);
93 ehdr->e_ident[EI_CLASS] = VG_ELF_CLASS;
94 ehdr->e_ident[EI_DATA] = VG_ELF_DATA2XXX;
95 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
96
97 ehdr->e_type = ET_CORE;
98 ehdr->e_machine = VG_ELF_MACHINE;
99 ehdr->e_version = EV_CURRENT;
100 ehdr->e_entry = 0;
101 ehdr->e_phoff = sizeof(ESZ(Ehdr));
102 ehdr->e_shoff = 0;
103 ehdr->e_flags = 0;
104 ehdr->e_ehsize = sizeof(ESZ(Ehdr));
105 ehdr->e_phentsize = sizeof(ESZ(Phdr));
106 ehdr->e_phnum = num_phdrs;
107 ehdr->e_shentsize = 0;
108 ehdr->e_shnum = 0;
109 ehdr->e_shstrndx = 0;
110
111 }
112
fill_phdr(ESZ (Phdr)* phdr,const NSegment * seg,UInt off,Bool write)113 static void fill_phdr(ESZ(Phdr) *phdr, const NSegment *seg, UInt off, Bool write)
114 {
115 SizeT len = seg->end - seg->start;
116
117 write = write && should_dump(seg);
118
119 VG_(memset)(phdr, 0, sizeof(*phdr));
120
121 phdr->p_type = PT_LOAD;
122 phdr->p_offset = off;
123 phdr->p_vaddr = seg->start;
124 phdr->p_paddr = 0;
125 phdr->p_filesz = write ? len : 0;
126 phdr->p_memsz = len;
127 phdr->p_flags = 0;
128
129 if (seg->hasR)
130 phdr->p_flags |= PF_R;
131 if (seg->hasW)
132 phdr->p_flags |= PF_W;
133 if (seg->hasX)
134 phdr->p_flags |= PF_X;
135
136 phdr->p_align = VKI_PAGE_SIZE;
137 }
138
139 struct note {
140 struct note *next;
141 ESZ(Nhdr) note;
142 Char name[0];
143 };
144
note_size(const struct note * n)145 static UInt note_size(const struct note *n)
146 {
147 return sizeof(ESZ(Nhdr)) + VG_ROUNDUP(VG_(strlen)(n->name)+1, 4)
148 + VG_ROUNDUP(n->note.n_descsz, 4);
149 }
150
151 #if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android)
add_note(struct note ** list,const Char * name,UInt type,const void * data,UInt datasz)152 static void add_note(struct note **list, const Char *name, UInt type,
153 const void *data, UInt datasz)
154 {
155 Int namelen = VG_(strlen)(name)+1;
156 Int notelen = sizeof(struct note) +
157 VG_ROUNDUP(namelen, 4) +
158 VG_ROUNDUP(datasz, 4);
159 struct note *n = VG_(arena_malloc)(VG_AR_CORE, "coredump-elf.an.1", notelen);
160
161 VG_(memset)(n, 0, notelen);
162
163 n->next = *list;
164 *list = n;
165
166 n->note.n_type = type;
167 n->note.n_namesz = namelen;
168 n->note.n_descsz = datasz;
169
170 VG_(memcpy)(n->name, name, namelen);
171 VG_(memcpy)(n->name+VG_ROUNDUP(namelen,4), data, datasz);
172 }
173 #endif /* !defined(VGPV_*_linux_android) */
174
write_note(Int fd,const struct note * n)175 static void write_note(Int fd, const struct note *n)
176 {
177 VG_(write)(fd, &n->note, note_size(n));
178 }
179
fill_prpsinfo(const ThreadState * tst,struct vki_elf_prpsinfo * prpsinfo)180 static void fill_prpsinfo(const ThreadState *tst,
181 struct vki_elf_prpsinfo *prpsinfo)
182 {
183 static Char name[VKI_PATH_MAX];
184
185 VG_(memset)(prpsinfo, 0, sizeof(*prpsinfo));
186
187 switch(tst->status) {
188 case VgTs_Runnable:
189 case VgTs_Yielding:
190 prpsinfo->pr_sname = 'R';
191 break;
192
193 case VgTs_WaitSys:
194 prpsinfo->pr_sname = 'S';
195 break;
196
197 case VgTs_Zombie:
198 prpsinfo->pr_sname = 'Z';
199 break;
200
201 case VgTs_Empty:
202 case VgTs_Init:
203 prpsinfo->pr_sname = '?';
204 break;
205 }
206
207 prpsinfo->pr_uid = 0;
208 prpsinfo->pr_gid = 0;
209
210 if (VG_(resolve_filename)(VG_(cl_exec_fd), name, VKI_PATH_MAX)) {
211 Char *n = name+VG_(strlen)(name)-1;
212
213 while (n > name && *n != '/')
214 n--;
215 if (n != name)
216 n++;
217
218 VG_(strncpy)(prpsinfo->pr_fname, n, sizeof(prpsinfo->pr_fname));
219 }
220 }
221
fill_prstatus(const ThreadState * tst,struct vki_elf_prstatus * prs,const vki_siginfo_t * si)222 static void fill_prstatus(const ThreadState *tst,
223 struct vki_elf_prstatus *prs,
224 const vki_siginfo_t *si)
225 {
226 struct vki_user_regs_struct *regs;
227 ThreadArchState* arch = (ThreadArchState*)&tst->arch;
228
229 VG_(memset)(prs, 0, sizeof(*prs));
230
231 prs->pr_info.si_signo = si->si_signo;
232 prs->pr_info.si_code = si->si_code;
233 prs->pr_info.si_errno = 0;
234
235 prs->pr_cursig = si->si_signo;
236
237 prs->pr_pid = tst->os_state.lwpid;
238 prs->pr_ppid = 0;
239 prs->pr_pgrp = VG_(getpgrp)();
240 prs->pr_sid = VG_(getpgrp)();
241
242 #ifdef VGP_s390x_linux
243 /* prs->pr_reg has struct type. Need to take address. */
244 regs = (struct vki_user_regs_struct *)&(prs->pr_reg);
245 #else
246 regs = (struct vki_user_regs_struct *)prs->pr_reg;
247
248 vg_assert(sizeof(*regs) == sizeof(prs->pr_reg));
249 #endif
250
251 #if defined(VGP_x86_linux)
252 regs->eflags = LibVEX_GuestX86_get_eflags( &arch->vex );
253 regs->esp = arch->vex.guest_ESP;
254 regs->eip = arch->vex.guest_EIP;
255
256 regs->ebx = arch->vex.guest_EBX;
257 regs->ecx = arch->vex.guest_ECX;
258 regs->edx = arch->vex.guest_EDX;
259 regs->esi = arch->vex.guest_ESI;
260 regs->edi = arch->vex.guest_EDI;
261 regs->ebp = arch->vex.guest_EBP;
262 regs->eax = arch->vex.guest_EAX;
263
264 regs->cs = arch->vex.guest_CS;
265 regs->ds = arch->vex.guest_DS;
266 regs->ss = arch->vex.guest_SS;
267 regs->es = arch->vex.guest_ES;
268 regs->fs = arch->vex.guest_FS;
269 regs->gs = arch->vex.guest_GS;
270
271 #elif defined(VGP_amd64_linux)
272 regs->eflags = LibVEX_GuestAMD64_get_rflags( &((ThreadArchState*)arch)->vex );
273 regs->rsp = arch->vex.guest_RSP;
274 regs->rip = arch->vex.guest_RIP;
275
276 regs->rbx = arch->vex.guest_RBX;
277 regs->rcx = arch->vex.guest_RCX;
278 regs->rdx = arch->vex.guest_RDX;
279 regs->rsi = arch->vex.guest_RSI;
280 regs->rdi = arch->vex.guest_RDI;
281 regs->rbp = arch->vex.guest_RBP;
282 regs->rax = arch->vex.guest_RAX;
283 regs->r8 = arch->vex.guest_R8;
284 regs->r9 = arch->vex.guest_R9;
285 regs->r10 = arch->vex.guest_R10;
286 regs->r11 = arch->vex.guest_R11;
287 regs->r12 = arch->vex.guest_R12;
288 regs->r13 = arch->vex.guest_R13;
289 regs->r14 = arch->vex.guest_R14;
290 regs->r15 = arch->vex.guest_R15;
291
292 //:: regs->cs = arch->vex.guest_CS;
293 //:: regs->fs = arch->vex.guest_FS;
294 //:: regs->gs = arch->vex.guest_GS;
295
296 #elif defined(VGP_ppc32_linux)
297 # define DO(n) regs->gpr[n] = arch->vex.guest_GPR##n
298 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
299 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
300 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
301 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
302 # undef DO
303
304 regs->nip = arch->vex.guest_CIA;
305 regs->msr = 0xf032; /* pretty arbitrary */
306 regs->orig_gpr3 = arch->vex.guest_GPR3;
307 regs->ctr = arch->vex.guest_CTR;
308 regs->link = arch->vex.guest_LR;
309 regs->xer = LibVEX_GuestPPC32_get_XER( &((ThreadArchState*)arch)->vex );
310 regs->ccr = LibVEX_GuestPPC32_get_CR( &((ThreadArchState*)arch)->vex );
311 regs->mq = 0;
312 regs->trap = 0;
313 regs->dar = 0; /* should be fault address? */
314 regs->dsisr = 0;
315 regs->result = 0;
316
317 #elif defined(VGP_ppc64_linux)
318 # define DO(n) regs->gpr[n] = arch->vex.guest_GPR##n
319 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
320 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
321 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
322 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
323 # undef DO
324
325 regs->nip = arch->vex.guest_CIA;
326 regs->msr = 0xf032; /* pretty arbitrary */
327 regs->orig_gpr3 = arch->vex.guest_GPR3;
328 regs->ctr = arch->vex.guest_CTR;
329 regs->link = arch->vex.guest_LR;
330 regs->xer = LibVEX_GuestPPC64_get_XER( &((ThreadArchState*)arch)->vex );
331 regs->ccr = LibVEX_GuestPPC64_get_CR( &((ThreadArchState*)arch)->vex );
332 /* regs->mq = 0; */
333 regs->trap = 0;
334 regs->dar = 0; /* should be fault address? */
335 regs->dsisr = 0;
336 regs->result = 0;
337
338 #elif defined(VGP_arm_linux)
339 regs->ARM_r0 = arch->vex.guest_R0;
340 regs->ARM_r1 = arch->vex.guest_R1;
341 regs->ARM_r2 = arch->vex.guest_R2;
342 regs->ARM_r3 = arch->vex.guest_R3;
343 regs->ARM_r4 = arch->vex.guest_R4;
344 regs->ARM_r5 = arch->vex.guest_R5;
345 regs->ARM_r6 = arch->vex.guest_R6;
346 regs->ARM_r7 = arch->vex.guest_R7;
347 regs->ARM_r8 = arch->vex.guest_R8;
348 regs->ARM_r9 = arch->vex.guest_R9;
349 regs->ARM_r10 = arch->vex.guest_R10;
350 regs->ARM_fp = arch->vex.guest_R11;
351 regs->ARM_ip = arch->vex.guest_R12;
352 regs->ARM_sp = arch->vex.guest_R13;
353 regs->ARM_lr = arch->vex.guest_R14;
354 regs->ARM_pc = arch->vex.guest_R15T;
355 regs->ARM_cpsr = LibVEX_GuestARM_get_cpsr( &((ThreadArchState*)arch)->vex );
356
357 #elif defined(VGP_s390x_linux)
358 # define DO(n) regs->gprs[n] = arch->vex.guest_r##n
359 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
360 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
361 # undef DO
362 # define DO(n) regs->acrs[n] = arch->vex.guest_a##n
363 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
364 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
365 # undef DO
366 regs->orig_gpr2 = arch->vex.guest_r2;
367 #elif defined(VGP_mips32_linux)
368 # define DO(n) regs->MIPS_r##n = arch->vex.guest_r##n
369 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
370 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
371 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
372 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
373 # undef DO
374 regs->MIPS_hi = arch->vex.guest_HI;
375 regs->MIPS_lo = arch->vex.guest_LO;
376 #else
377 # error Unknown ELF platform
378 #endif
379 }
380
fill_fpu(const ThreadState * tst,vki_elf_fpregset_t * fpu)381 static void fill_fpu(const ThreadState *tst, vki_elf_fpregset_t *fpu)
382 {
383 __attribute__((unused))
384 ThreadArchState* arch = (ThreadArchState*)&tst->arch;
385
386 #if defined(VGP_x86_linux)
387 //:: static void fill_fpu(vki_elf_fpregset_t *fpu, const Char *from)
388 //:: {
389 //:: if (VG_(have_ssestate)) {
390 //:: UShort *to;
391 //:: Int i;
392 //::
393 //:: /* This is what the kernel does */
394 //:: VG_(memcpy)(fpu, from, 7*sizeof(long));
395 //::
396 //:: to = (UShort *)&fpu->st_space[0];
397 //:: from += 18 * sizeof(UShort);
398 //::
399 //:: for (i = 0; i < 8; i++, to += 5, from += 8)
400 //:: VG_(memcpy)(to, from, 5*sizeof(UShort));
401 //:: } else
402 //:: VG_(memcpy)(fpu, from, sizeof(*fpu));
403 //:: }
404
405 //:: fill_fpu(fpu, (const Char *)&arch->m_sse);
406
407 #elif defined(VGP_amd64_linux)
408 //:: fpu->cwd = ?;
409 //:: fpu->swd = ?;
410 //:: fpu->twd = ?;
411 //:: fpu->fop = ?;
412 //:: fpu->rip = ?;
413 //:: fpu->rdp = ?;
414 //:: fpu->mxcsr = ?;
415 //:: fpu->mxcsr_mask = ?;
416 //:: fpu->st_space = ?;
417
418 # define DO(n) VG_(memcpy)(fpu->xmm_space + n * 4, \
419 &arch->vex.guest_YMM##n[0], 16)
420 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
421 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
422 # undef DO
423
424 VG_(memset)(fpu->padding, 0, sizeof(fpu->padding));
425
426 #elif defined(VGP_ppc32_linux)
427 /* The guest state has the FPR fields declared as ULongs, so need
428 to fish out the values without converting them.
429 NOTE: The 32 FP registers map to the first 32 VSX registers.*/
430 # define DO(n) (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
431 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
432 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
433 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
434 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
435 # undef DO
436
437 #elif defined(VGP_ppc64_linux)
438 /* The guest state has the FPR fields declared as ULongs, so need
439 to fish out the values without converting them.
440 NOTE: The 32 FP registers map to the first 32 VSX registers.*/
441 # define DO(n) (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
442 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
443 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
444 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
445 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
446 # undef DO
447
448 #elif defined(VGP_arm_linux)
449 // umm ...
450
451 #elif defined(VGP_s390x_linux)
452 # define DO(n) fpu->fprs[n].ui = arch->vex.guest_f##n
453 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
454 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
455 # undef DO
456 #elif defined(VGP_mips32_linux)
457 # define DO(n) (*fpu)[n] = *(double*)(&arch->vex.guest_f##n)
458 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
459 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
460 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
461 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
462 # undef DO
463 #else
464 # error Unknown ELF platform
465 #endif
466 }
467
468 #if defined(VGP_x86_linux) && !defined(VGPV_x86_linux_android)
fill_xfpu(const ThreadState * tst,vki_elf_fpxregset_t * xfpu)469 static void fill_xfpu(const ThreadState *tst, vki_elf_fpxregset_t *xfpu)
470 {
471 ThreadArchState* arch = (ThreadArchState*)&tst->arch;
472
473 //:: xfpu->cwd = ?;
474 //:: xfpu->swd = ?;
475 //:: xfpu->twd = ?;
476 //:: xfpu->fop = ?;
477 //:: xfpu->fip = ?;
478 //:: xfpu->fcs = ?;
479 //:: xfpu->foo = ?;
480 //:: xfpu->fos = ?;
481 //:: xfpu->mxcsr = ?;
482 xfpu->reserved = 0;
483 //:: xfpu->st_space = ?;
484
485 # define DO(n) VG_(memcpy)(xfpu->xmm_space + n * 4, &arch->vex.guest_XMM##n, sizeof(arch->vex.guest_XMM##n))
486 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
487 # undef DO
488
489 VG_(memset)(xfpu->padding, 0, sizeof(xfpu->padding));
490 }
491 #endif
492
493 static
make_elf_coredump(ThreadId tid,const vki_siginfo_t * si,UInt max_size)494 void make_elf_coredump(ThreadId tid, const vki_siginfo_t *si, UInt max_size)
495 {
496 Char* buf = NULL;
497 Char *basename = "vgcore";
498 Char *coreext = "";
499 Int seq = 0;
500 Int core_fd;
501 NSegment const * seg;
502 ESZ(Ehdr) ehdr;
503 ESZ(Phdr) *phdrs;
504 Int num_phdrs;
505 Int i, idx;
506 UInt off;
507 struct note *notelist, *note;
508 UInt notesz;
509 struct vki_elf_prpsinfo prpsinfo;
510 struct vki_elf_prstatus prstatus;
511 Addr *seg_starts;
512 Int n_seg_starts;
513
514 if (VG_(clo_log_fname_expanded) != NULL) {
515 coreext = ".core";
516 basename = VG_(expand_file_name)(
517 "--log-file (while creating core filename)",
518 VG_(clo_log_fname_expanded));
519 }
520
521 vg_assert(coreext);
522 vg_assert(basename);
523 buf = VG_(malloc)( "coredump-elf.mec.1",
524 VG_(strlen)(coreext) + VG_(strlen)(basename)
525 + 100/*for the two %ds. */ );
526 vg_assert(buf);
527
528 for(;;) {
529 Int oflags = VKI_O_CREAT|VKI_O_WRONLY|VKI_O_EXCL|VKI_O_TRUNC;
530 SysRes sres;
531
532 if (seq == 0)
533 VG_(sprintf)(buf, "%s%s.%d",
534 basename, coreext, VG_(getpid)());
535 else
536 VG_(sprintf)(buf, "%s%s.%d.%d",
537 basename, coreext, VG_(getpid)(), seq);
538 seq++;
539
540 # if defined(VKI_O_LARGEFILE)
541 oflags |= VKI_O_LARGEFILE;
542 # endif
543
544 sres = VG_(open)(buf, oflags, VKI_S_IRUSR|VKI_S_IWUSR);
545 if (!sr_isError(sres)) {
546 core_fd = sr_Res(sres);
547 break;
548 }
549
550 if (sr_isError(sres) && sr_Err(sres) != VKI_EEXIST)
551 return; /* can't create file */
552 }
553
554 /* Get the segments */
555 seg_starts = VG_(get_segment_starts)(&n_seg_starts);
556
557 /* First, count how many memory segments to dump */
558 num_phdrs = 1; /* start with notes */
559 for(i = 0; i < n_seg_starts; i++) {
560 if (!may_dump(VG_(am_find_nsegment(seg_starts[i]))))
561 continue;
562
563 num_phdrs++;
564 }
565
566 fill_ehdr(&ehdr, num_phdrs);
567
568 notelist = NULL;
569
570 /* Second, work out their layout */
571 phdrs = VG_(arena_malloc)(VG_AR_CORE, "coredump-elf.mec.1",
572 sizeof(*phdrs) * num_phdrs);
573
574 for(i = 1; i < VG_N_THREADS; i++) {
575 vki_elf_fpregset_t fpu;
576
577 if (VG_(threads)[i].status == VgTs_Empty)
578 continue;
579
580 # if defined(VGP_x86_linux)
581 # if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android)
582 {
583 vki_elf_fpxregset_t xfpu;
584 fill_xfpu(&VG_(threads)[i], &xfpu);
585 add_note(¬elist, "LINUX", NT_PRXFPREG, &xfpu, sizeof(xfpu));
586 }
587 # endif
588 # endif
589
590 fill_fpu(&VG_(threads)[i], &fpu);
591 # if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android)
592 add_note(¬elist, "CORE", NT_FPREGSET, &fpu, sizeof(fpu));
593 # endif
594
595 fill_prstatus(&VG_(threads)[i], &prstatus, si);
596 # if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android)
597 add_note(¬elist, "CORE", NT_PRSTATUS, &prstatus, sizeof(prstatus));
598 # endif
599 }
600
601 fill_prpsinfo(&VG_(threads)[tid], &prpsinfo);
602 # if !defined(VGPV_arm_linux_android) && !defined(VGPV_x86_linux_android)
603 add_note(¬elist, "CORE", NT_PRPSINFO, &prpsinfo, sizeof(prpsinfo));
604 # endif
605
606 for (note = notelist, notesz = 0; note != NULL; note = note->next)
607 notesz += note_size(note);
608
609 off = sizeof(ehdr) + sizeof(*phdrs) * num_phdrs;
610
611 phdrs[0].p_type = PT_NOTE;
612 phdrs[0].p_offset = off;
613 phdrs[0].p_vaddr = 0;
614 phdrs[0].p_paddr = 0;
615 phdrs[0].p_filesz = notesz;
616 phdrs[0].p_memsz = 0;
617 phdrs[0].p_flags = 0;
618 phdrs[0].p_align = 0;
619
620 off += notesz;
621
622 off = VG_PGROUNDUP(off);
623
624 for(i = 0, idx = 1; i < n_seg_starts; i++) {
625 seg = VG_(am_find_nsegment(seg_starts[i]));
626
627 if (!may_dump(seg))
628 continue;
629
630 fill_phdr(&phdrs[idx], seg, off,
631 (seg->end - seg->start + off) < max_size);
632
633 off += phdrs[idx].p_filesz;
634
635 idx++;
636 }
637
638 /* write everything out */
639 VG_(write)(core_fd, &ehdr, sizeof(ehdr));
640 VG_(write)(core_fd, phdrs, sizeof(*phdrs) * num_phdrs);
641
642 for(note = notelist; note != NULL; note = note->next)
643 write_note(core_fd, note);
644
645 VG_(lseek)(core_fd, phdrs[1].p_offset, VKI_SEEK_SET);
646
647 for(i = 0, idx = 1; i < n_seg_starts; i++) {
648 seg = VG_(am_find_nsegment(seg_starts[i]));
649
650 if (!should_dump(seg))
651 continue;
652
653 if (phdrs[idx].p_filesz > 0) {
654 vg_assert(VG_(lseek)(core_fd, phdrs[idx].p_offset, VKI_SEEK_SET)
655 == phdrs[idx].p_offset);
656 vg_assert(seg->end - seg->start >= phdrs[idx].p_filesz);
657
658 (void)VG_(write)(core_fd, (void *)seg->start, phdrs[idx].p_filesz);
659 }
660 idx++;
661 }
662
663 VG_(free)(seg_starts);
664
665 VG_(close)(core_fd);
666 }
667
VG_(make_coredump)668 void VG_(make_coredump)(ThreadId tid, const vki_siginfo_t *si, UInt max_size)
669 {
670 make_elf_coredump(tid, si, max_size);
671 }
672
673 #endif // defined(VGO_linux)
674
675 /*--------------------------------------------------------------------*/
676 /*--- end ---*/
677 /*--------------------------------------------------------------------*/
678