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      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) 2000-2015 Julian Seward
     11       jseward (at) 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_threadstate.h"
     46 #include "pub_core_xarray.h"
     47 #include "pub_core_clientstate.h"
     48 #include "pub_core_options.h"
     49 
     50 /*
     51   Dump core
     52 
     53   Generate a standard ELF core file corresponding to the client state
     54   at the time of a crash.
     55  */
     56 #include <elf.h>
     57 #ifndef NT_PRXFPREG
     58 #define NT_PRXFPREG    0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
     59 #endif /* NT_PRXFPREG */
     60 
     61 #if	VG_WORDSIZE == 8
     62 #define ESZ(x)	Elf64_##x
     63 #elif	VG_WORDSIZE == 4
     64 #define ESZ(x)	Elf32_##x
     65 #else
     66 #error VG_WORDSIZE needs to ==4 or ==8
     67 #endif
     68 
     69 /* If true, then this Segment may be mentioned in the core */
     70 static Bool may_dump(const NSegment *seg)
     71 {
     72    if (seg->kind == SkAnonC ||
     73        seg->kind == SkShmC ||
     74        (seg->kind == SkFileC &&
     75         !VKI_S_ISCHR(seg->mode) && !VKI_S_ISBLK(seg->mode)))
     76       return True;
     77 
     78    return False;
     79 }
     80 
     81 /* If true, then this Segment's contents will be in the core */
     82 static Bool should_dump(const NSegment *seg)
     83 {
     84    return may_dump(seg); // && seg->hasW;
     85 }
     86 
     87 static void fill_ehdr(ESZ(Ehdr) *ehdr, Int num_phdrs)
     88 {
     89    VG_(memset)(ehdr, 0, sizeof(*ehdr));
     90 
     91    VG_(memcpy)(ehdr->e_ident, ELFMAG, SELFMAG);
     92    ehdr->e_ident[EI_CLASS]   = VG_ELF_CLASS;
     93    ehdr->e_ident[EI_DATA]    = VG_ELF_DATA2XXX;
     94    ehdr->e_ident[EI_VERSION] = EV_CURRENT;
     95 
     96    ehdr->e_type = ET_CORE;
     97    ehdr->e_machine = VG_ELF_MACHINE;
     98    ehdr->e_version = EV_CURRENT;
     99    ehdr->e_entry = 0;
    100    ehdr->e_phoff = sizeof(ESZ(Ehdr));
    101    ehdr->e_shoff = 0;
    102    ehdr->e_flags = 0;
    103    ehdr->e_ehsize = sizeof(ESZ(Ehdr));
    104    ehdr->e_phentsize = sizeof(ESZ(Phdr));
    105    ehdr->e_phnum = num_phdrs;
    106    ehdr->e_shentsize = 0;
    107    ehdr->e_shnum = 0;
    108    ehdr->e_shstrndx = 0;
    109 
    110 }
    111 
    112 static void fill_phdr(ESZ(Phdr) *phdr, const NSegment *seg, UInt off, Bool write)
    113 {
    114    SizeT len = seg->end - seg->start + 1;
    115 
    116    write = write && should_dump(seg);
    117 
    118    VG_(memset)(phdr, 0, sizeof(*phdr));
    119 
    120    phdr->p_type = PT_LOAD;
    121    phdr->p_offset = off;
    122    phdr->p_vaddr = seg->start;
    123    phdr->p_paddr = 0;
    124    phdr->p_filesz = write ? len : 0;
    125    phdr->p_memsz = len;
    126    phdr->p_flags = 0;
    127 
    128    if (seg->hasR)
    129       phdr->p_flags |= PF_R;
    130    if (seg->hasW)
    131       phdr->p_flags |= PF_W;
    132    if (seg->hasX)
    133       phdr->p_flags |= PF_X;
    134 
    135    phdr->p_align = VKI_PAGE_SIZE;
    136 }
    137 
    138 struct note {
    139    struct note *next;
    140    ESZ(Nhdr) note;
    141    HChar name[0];
    142 };
    143 
    144 static UInt note_size(const struct note *n)
    145 {
    146    return sizeof(ESZ(Nhdr)) + VG_ROUNDUP(VG_(strlen)(n->name)+1, 4)
    147                             + VG_ROUNDUP(n->note.n_descsz, 4);
    148 }
    149 
    150 #if !defined(VGPV_arm_linux_android) \
    151     && !defined(VGPV_x86_linux_android) \
    152     && !defined(VGPV_mips32_linux_android) \
    153     && !defined(VGPV_arm64_linux_android)
    154 static void add_note(struct note **list, const HChar *name, UInt type,
    155                      const void *data, UInt datasz)
    156 {
    157    Int namelen = VG_(strlen)(name)+1;
    158    Int notelen = sizeof(struct note) +
    159       VG_ROUNDUP(namelen, 4) +
    160       VG_ROUNDUP(datasz, 4);
    161    struct note *n = VG_(malloc)("coredump-elf.an.1", notelen);
    162 
    163    VG_(memset)(n, 0, notelen);
    164 
    165    n->next = *list;
    166    *list = n;
    167 
    168    n->note.n_type = type;
    169    n->note.n_namesz = namelen;
    170    n->note.n_descsz = datasz;
    171 
    172    VG_(memcpy)(n->name, name, namelen);
    173    VG_(memcpy)(n->name+VG_ROUNDUP(namelen,4), data, datasz);
    174 }
    175 #endif /* !defined(VGPV_*_linux_android) */
    176 
    177 static void write_note(Int fd, const struct note *n)
    178 {
    179    VG_(write)(fd, &n->note, note_size(n));
    180 }
    181 
    182 static void fill_prpsinfo(const ThreadState *tst,
    183                           struct vki_elf_prpsinfo *prpsinfo)
    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    VG_(client_fname)(prpsinfo->pr_fname, sizeof(prpsinfo->pr_fname), False);
    211 }
    212 
    213 static void fill_prstatus(const ThreadState *tst,
    214 			  /*OUT*/struct vki_elf_prstatus *prs,
    215 			  const vki_siginfo_t *si)
    216 {
    217    struct vki_user_regs_struct *regs;
    218    const ThreadArchState* arch = &tst->arch;
    219 
    220    VG_(memset)(prs, 0, sizeof(*prs));
    221 
    222    prs->pr_info.si_signo = si->si_signo;
    223    prs->pr_info.si_code = si->si_code;
    224    prs->pr_info.si_errno = 0;
    225 
    226    prs->pr_cursig = si->si_signo;
    227 
    228    prs->pr_pid = tst->os_state.lwpid;
    229    prs->pr_ppid = 0;
    230    prs->pr_pgrp = VG_(getpgrp)();
    231    prs->pr_sid = VG_(getpgrp)();
    232 
    233 #if defined(VGP_s390x_linux)
    234    /* prs->pr_reg has struct type. Need to take address. */
    235    regs = (struct vki_user_regs_struct *)&(prs->pr_reg);
    236 #else
    237    regs = (struct vki_user_regs_struct *)prs->pr_reg;
    238    vg_assert(sizeof(*regs) == sizeof(prs->pr_reg));
    239 #endif
    240 
    241 #if defined(VGP_x86_linux)
    242    regs->eflags = LibVEX_GuestX86_get_eflags( &arch->vex );
    243    regs->esp    = arch->vex.guest_ESP;
    244    regs->eip    = arch->vex.guest_EIP;
    245 
    246    regs->ebx    = arch->vex.guest_EBX;
    247    regs->ecx    = arch->vex.guest_ECX;
    248    regs->edx    = arch->vex.guest_EDX;
    249    regs->esi    = arch->vex.guest_ESI;
    250    regs->edi    = arch->vex.guest_EDI;
    251    regs->ebp    = arch->vex.guest_EBP;
    252    regs->eax    = arch->vex.guest_EAX;
    253 
    254    regs->cs     = arch->vex.guest_CS;
    255    regs->ds     = arch->vex.guest_DS;
    256    regs->ss     = arch->vex.guest_SS;
    257    regs->es     = arch->vex.guest_ES;
    258    regs->fs     = arch->vex.guest_FS;
    259    regs->gs     = arch->vex.guest_GS;
    260 
    261 #elif defined(VGP_amd64_linux)
    262    regs->eflags = LibVEX_GuestAMD64_get_rflags( &arch->vex );
    263    regs->rsp    = arch->vex.guest_RSP;
    264    regs->rip    = arch->vex.guest_RIP;
    265 
    266    regs->rbx    = arch->vex.guest_RBX;
    267    regs->rcx    = arch->vex.guest_RCX;
    268    regs->rdx    = arch->vex.guest_RDX;
    269    regs->rsi    = arch->vex.guest_RSI;
    270    regs->rdi    = arch->vex.guest_RDI;
    271    regs->rbp    = arch->vex.guest_RBP;
    272    regs->rax    = arch->vex.guest_RAX;
    273    regs->r8     = arch->vex.guest_R8;
    274    regs->r9     = arch->vex.guest_R9;
    275    regs->r10    = arch->vex.guest_R10;
    276    regs->r11    = arch->vex.guest_R11;
    277    regs->r12    = arch->vex.guest_R12;
    278    regs->r13    = arch->vex.guest_R13;
    279    regs->r14    = arch->vex.guest_R14;
    280    regs->r15    = arch->vex.guest_R15;
    281 
    282 #elif defined(VGP_ppc32_linux)
    283 #  define DO(n)  regs->gpr[n] = arch->vex.guest_GPR##n
    284    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    285    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    286    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    287    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    288 #  undef DO
    289 
    290    regs->nip = arch->vex.guest_CIA;
    291    regs->msr = 0xf032;   /* pretty arbitrary */
    292    regs->orig_gpr3 = arch->vex.guest_GPR3;
    293    regs->ctr = arch->vex.guest_CTR;
    294    regs->link = arch->vex.guest_LR;
    295    regs->xer = LibVEX_GuestPPC32_get_XER( &arch->vex );
    296    regs->ccr = LibVEX_GuestPPC32_get_CR( &arch->vex );
    297    regs->mq = 0;
    298    regs->trap = 0;
    299    regs->dar = 0; /* should be fault address? */
    300    regs->dsisr = 0;
    301    regs->result = 0;
    302 
    303 #elif defined(VGP_ppc64be_linux)
    304 #  define DO(n)  regs->gpr[n] = arch->vex.guest_GPR##n
    305    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    306    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    307    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    308    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    309 #  undef DO
    310 
    311    regs->nip = arch->vex.guest_CIA;
    312    regs->msr = 0xf032;   /* pretty arbitrary */
    313    regs->orig_gpr3 = arch->vex.guest_GPR3;
    314    regs->ctr = arch->vex.guest_CTR;
    315    regs->link = arch->vex.guest_LR;
    316    regs->xer = LibVEX_GuestPPC64_get_XER( &arch->vex );
    317    regs->ccr = LibVEX_GuestPPC64_get_CR( &arch->vex );
    318    /* regs->mq = 0; */
    319    regs->trap = 0;
    320    regs->dar = 0; /* should be fault address? */
    321    regs->dsisr = 0;
    322    regs->result = 0;
    323 
    324 #elif defined(VGP_ppc64le_linux)
    325 #  define DO(n)  regs->gpr[n] = arch->vex.guest_GPR##n
    326    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    327    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    328    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    329    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    330 #  undef DO
    331 
    332    regs->nip = arch->vex.guest_CIA;
    333    regs->msr = 0xf033;   /* pretty arbitrary */
    334    regs->orig_gpr3 = arch->vex.guest_GPR3;
    335    regs->ctr = arch->vex.guest_CTR;
    336    regs->link = arch->vex.guest_LR;
    337    regs->xer = LibVEX_GuestPPC64_get_XER( &(arch->vex) );
    338    regs->ccr = LibVEX_GuestPPC64_get_CR( &(arch->vex) );
    339    /* regs->mq = 0; */
    340    regs->trap = 0;
    341    regs->dar = 0; /* should be fault address? */
    342    regs->dsisr = 0;
    343    regs->result = 0;
    344 
    345 #elif defined(VGP_arm_linux)
    346    regs->ARM_r0   = arch->vex.guest_R0;
    347    regs->ARM_r1   = arch->vex.guest_R1;
    348    regs->ARM_r2   = arch->vex.guest_R2;
    349    regs->ARM_r3   = arch->vex.guest_R3;
    350    regs->ARM_r4   = arch->vex.guest_R4;
    351    regs->ARM_r5   = arch->vex.guest_R5;
    352    regs->ARM_r6   = arch->vex.guest_R6;
    353    regs->ARM_r7   = arch->vex.guest_R7;
    354    regs->ARM_r8   = arch->vex.guest_R8;
    355    regs->ARM_r9   = arch->vex.guest_R9;
    356    regs->ARM_r10  = arch->vex.guest_R10;
    357    regs->ARM_fp   = arch->vex.guest_R11;
    358    regs->ARM_ip   = arch->vex.guest_R12;
    359    regs->ARM_sp   = arch->vex.guest_R13;
    360    regs->ARM_lr   = arch->vex.guest_R14;
    361    regs->ARM_pc   = arch->vex.guest_R15T;
    362    regs->ARM_cpsr = LibVEX_GuestARM_get_cpsr( &arch->vex );
    363 
    364 #elif defined(VGP_arm64_linux)
    365    (void)arch;
    366    I_die_here;
    367 
    368 #elif defined(VGP_s390x_linux)
    369 #  define DO(n)  regs->gprs[n] = arch->vex.guest_r##n
    370    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    371    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    372 #  undef DO
    373 #  define DO(n)  regs->acrs[n] = arch->vex.guest_a##n
    374    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    375    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    376 #  undef DO
    377    regs->orig_gpr2 = arch->vex.guest_r2;
    378 
    379 #elif defined(VGP_mips32_linux)
    380 #  define DO(n)  regs->MIPS_r##n = arch->vex.guest_r##n
    381    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    382    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    383    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    384    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    385 #  undef DO
    386    regs->MIPS_hi   = arch->vex.guest_HI;
    387    regs->MIPS_lo   = arch->vex.guest_LO;
    388 
    389 #elif defined(VGP_mips64_linux)
    390 #  define DO(n)  regs->MIPS_r##n = arch->vex.guest_r##n
    391    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    392    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    393    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    394    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    395 #  undef DO
    396    regs->MIPS_hi   = arch->vex.guest_HI;
    397    regs->MIPS_lo   = arch->vex.guest_LO;
    398 #elif defined(VGP_tilegx_linux)
    399 #  define DO(n)  regs->regs[n] = arch->vex.guest_r##n
    400    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    401    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    402    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    403    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    404    DO(32); DO(33); DO(34); DO(35); DO(36); DO(37); DO(38); DO(39);
    405    DO(40); DO(41); DO(42); DO(43); DO(44); DO(45); DO(46); DO(47);
    406    DO(48); DO(49); DO(50); DO(51); DO(52); DO(53); DO(54); DO(55);
    407    regs->pc = arch->vex.guest_pc;
    408    regs->orig_r0 =  arch->vex.guest_r0;
    409 #else
    410 #  error Unknown ELF platform
    411 #endif
    412 }
    413 
    414 static void fill_fpu(const ThreadState *tst, vki_elf_fpregset_t *fpu)
    415 {
    416    __attribute__((unused))
    417    const ThreadArchState* arch = &tst->arch;
    418 
    419 #if defined(VGP_x86_linux)
    420 //:: static void fill_fpu(vki_elf_fpregset_t *fpu, const HChar *from)
    421 //:: {
    422 //::    if (VG_(have_ssestate)) {
    423 //::       UShort *to;
    424 //::       Int i;
    425 //::
    426 //::       /* This is what the kernel does */
    427 //::       VG_(memcpy)(fpu, from, 7*sizeof(long));
    428 //::
    429 //::       to = (UShort *)&fpu->st_space[0];
    430 //::       from += 18 * sizeof(UShort);
    431 //::
    432 //::       for (i = 0; i < 8; i++, to += 5, from += 8)
    433 //:: 	 VG_(memcpy)(to, from, 5*sizeof(UShort));
    434 //::    } else
    435 //::       VG_(memcpy)(fpu, from, sizeof(*fpu));
    436 //:: }
    437 
    438 //::    fill_fpu(fpu, (const HChar *)&arch->m_sse);
    439 
    440 #elif defined(VGP_amd64_linux)
    441 //::    fpu->cwd = ?;
    442 //::    fpu->swd = ?;
    443 //::    fpu->twd = ?;
    444 //::    fpu->fop = ?;
    445 //::    fpu->rip = ?;
    446 //::    fpu->rdp = ?;
    447 //::    fpu->mxcsr = ?;
    448 //::    fpu->mxcsr_mask = ?;
    449 //::    fpu->st_space = ?;
    450 
    451 #  define DO(n)  VG_(memcpy)(fpu->xmm_space + n * 4, \
    452                              &arch->vex.guest_YMM##n[0], 16)
    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 
    457    VG_(memset)(fpu->padding, 0, sizeof(fpu->padding));
    458 
    459 #elif defined(VGP_ppc32_linux)
    460    /* The guest state has the FPR fields declared as ULongs, so need
    461       to fish out the values without converting them.
    462       NOTE: The 32 FP registers map to the first 32 VSX registers.*/
    463 #  define DO(n)  (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
    464    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    465    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    466    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    467    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    468 #  undef DO
    469 
    470 #elif defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux)
    471    /* The guest state has the FPR fields declared as ULongs, so need
    472       to fish out the values without converting them.
    473       NOTE: The 32 FP registers map to the first 32 VSX registers.*/
    474 #  define DO(n)  (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
    475    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    476    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    477    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    478    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    479 #  undef DO
    480 
    481 #elif defined(VGP_arm_linux) || defined(VGP_tilegx_linux)
    482    // umm ...
    483 
    484 #elif defined(VGP_arm64_linux)
    485    I_die_here;
    486 
    487 #elif defined(VGP_s390x_linux)
    488 #  define DO(n)  fpu->fprs[n].ui = arch->vex.guest_f##n
    489    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    490    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    491 # undef DO
    492 #elif defined(VGP_mips32_linux)
    493 #  define DO(n)  (*fpu)[n] = *(double*)(&arch->vex.guest_f##n)
    494    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    495    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    496    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    497    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    498 #  undef DO
    499 #elif defined(VGP_mips32_linux) || defined(VGP_mips64_linux)
    500 #  define DO(n)  (*fpu)[n] = *(double*)(&arch->vex.guest_f##n)
    501    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    502    DO(8);  DO(9);  DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
    503    DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
    504    DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
    505 #  undef DO
    506 #else
    507 #  error Unknown ELF platform
    508 #endif
    509 }
    510 
    511 #if defined(VGP_x86_linux) && !defined(VGPV_x86_linux_android)
    512 static void fill_xfpu(const ThreadState *tst, vki_elf_fpxregset_t *xfpu)
    513 {
    514    const ThreadArchState* arch = &tst->arch;
    515 
    516 //::    xfpu->cwd = ?;
    517 //::    xfpu->swd = ?;
    518 //::    xfpu->twd = ?;
    519 //::    xfpu->fop = ?;
    520 //::    xfpu->fip = ?;
    521 //::    xfpu->fcs = ?;
    522 //::    xfpu->foo = ?;
    523 //::    xfpu->fos = ?;
    524 //::    xfpu->mxcsr = ?;
    525    xfpu->reserved = 0;
    526 //::    xfpu->st_space = ?;
    527 
    528 #  define DO(n)  VG_(memcpy)(xfpu->xmm_space + n * 4, &arch->vex.guest_XMM##n, sizeof(arch->vex.guest_XMM##n))
    529    DO(0);  DO(1);  DO(2);  DO(3);  DO(4);  DO(5);  DO(6);  DO(7);
    530 #  undef DO
    531 
    532    VG_(memset)(xfpu->padding, 0, sizeof(xfpu->padding));
    533 }
    534 #endif
    535 
    536 static
    537 void dump_one_thread(struct note **notelist, const vki_siginfo_t *si, ThreadId tid)
    538 {
    539    vki_elf_fpregset_t  fpu;
    540    struct vki_elf_prstatus prstatus;
    541 #     if defined(VGP_x86_linux) && !defined(VGPV_x86_linux_android)
    542       {
    543          vki_elf_fpxregset_t xfpu;
    544          fill_xfpu(&VG_(threads)[tid], &xfpu);
    545          add_note(notelist, "LINUX", NT_PRXFPREG, &xfpu, sizeof(xfpu));
    546       }
    547 #     endif
    548 
    549       fill_fpu(&VG_(threads)[tid], &fpu);
    550 #     if !defined(VGPV_arm_linux_android) \
    551          && !defined(VGPV_x86_linux_android) \
    552          && !defined(VGPV_mips32_linux_android) \
    553          && !defined(VGPV_arm64_linux_android)
    554       add_note(notelist, "CORE", NT_FPREGSET, &fpu, sizeof(fpu));
    555 #     endif
    556 
    557       fill_prstatus(&VG_(threads)[tid], &prstatus, si);
    558 #     if !defined(VGPV_arm_linux_android) \
    559          && !defined(VGPV_x86_linux_android) \
    560          && !defined(VGPV_mips32_linux_android) \
    561          && !defined(VGPV_arm64_linux_android)
    562       add_note(notelist, "CORE", NT_PRSTATUS, &prstatus, sizeof(prstatus));
    563 #     endif
    564 }
    565 
    566 static
    567 void make_elf_coredump(ThreadId tid, const vki_siginfo_t *si, ULong max_size)
    568 {
    569    HChar* buf = NULL;
    570    const HChar *basename = "vgcore";
    571    const HChar *coreext = "";
    572    Int seq = 0;
    573    Int core_fd;
    574    NSegment const * seg;
    575    ESZ(Ehdr) ehdr;
    576    ESZ(Phdr) *phdrs;
    577    Int num_phdrs;
    578    Int i, idx;
    579    UInt off;
    580    struct note *notelist, *note;
    581    UInt notesz;
    582    struct vki_elf_prpsinfo prpsinfo;
    583    Addr *seg_starts;
    584    Int n_seg_starts;
    585 
    586    if (VG_(clo_log_fname_expanded) != NULL) {
    587       coreext = ".core";
    588       basename = VG_(expand_file_name)("--log-file",
    589                                        VG_(clo_log_fname_expanded));
    590    }
    591 
    592    vg_assert(coreext);
    593    vg_assert(basename);
    594    buf = VG_(malloc)( "coredump-elf.mec.1",
    595                       VG_(strlen)(coreext) + VG_(strlen)(basename)
    596                          + 100/*for the two %ds. */ );
    597 
    598    for(;;) {
    599       Int oflags = VKI_O_CREAT|VKI_O_WRONLY|VKI_O_EXCL|VKI_O_TRUNC;
    600       SysRes sres;
    601 
    602       if (seq == 0)
    603 	 VG_(sprintf)(buf, "%s%s.%d",
    604 		      basename, coreext, VG_(getpid)());
    605       else
    606 	 VG_(sprintf)(buf, "%s%s.%d.%d",
    607 		      basename, coreext, VG_(getpid)(), seq);
    608       seq++;
    609 
    610 #     if defined(VKI_O_LARGEFILE)
    611       oflags |= VKI_O_LARGEFILE;
    612 #     endif
    613 
    614       sres = VG_(open)(buf, oflags, VKI_S_IRUSR|VKI_S_IWUSR);
    615       if (!sr_isError(sres)) {
    616          core_fd = sr_Res(sres);
    617 	 break;
    618       }
    619 
    620       if (sr_isError(sres) && sr_Err(sres) != VKI_EEXIST)
    621 	 return;		/* can't create file */
    622    }
    623 
    624    /* Get the client segments */
    625    seg_starts = VG_(get_segment_starts)(SkFileC | SkAnonC | SkShmC,
    626                                         &n_seg_starts);
    627 
    628    /* First, count how many memory segments to dump */
    629    num_phdrs = 1;		/* start with notes */
    630    for(i = 0; i < n_seg_starts; i++) {
    631       if (!may_dump(VG_(am_find_nsegment(seg_starts[i]))))
    632 	 continue;
    633 
    634       num_phdrs++;
    635    }
    636 
    637    fill_ehdr(&ehdr, num_phdrs);
    638 
    639    notelist = NULL;
    640 
    641    /* Second, work out their layout */
    642    phdrs = VG_(malloc)("coredump-elf.mec.1", sizeof(*phdrs) * num_phdrs);
    643 
    644    /* Add details for all threads except the one that faulted */
    645    for(i = 1; i < VG_N_THREADS; i++) {
    646 
    647       if (VG_(threads)[i].status == VgTs_Empty)
    648 	 continue;
    649 
    650       if (i == tid)
    651 	 continue;
    652 
    653       dump_one_thread(&notelist, si, i);
    654    }
    655 
    656    /* Add details for the faulting thread. Note that because we are
    657       adding to the head of a linked list this thread will actually
    658       come out first in the core file, which seems to be how
    659       debuggers determine that it is the faulting thread. */
    660    dump_one_thread(&notelist, si, tid);
    661 
    662    fill_prpsinfo(&VG_(threads)[tid], &prpsinfo);
    663 #  if !defined(VGPV_arm_linux_android) \
    664       && !defined(VGPV_x86_linux_android) \
    665       && !defined(VGPV_mips32_linux_android) \
    666       && !defined(VGPV_arm64_linux_android)
    667    add_note(&notelist, "CORE", NT_PRPSINFO, &prpsinfo, sizeof(prpsinfo));
    668 #  endif
    669 
    670    for (note = notelist, notesz = 0; note != NULL; note = note->next)
    671       notesz += note_size(note);
    672 
    673    off = sizeof(ehdr) + sizeof(*phdrs) * num_phdrs;
    674 
    675    phdrs[0].p_type = PT_NOTE;
    676    phdrs[0].p_offset = off;
    677    phdrs[0].p_vaddr = 0;
    678    phdrs[0].p_paddr = 0;
    679    phdrs[0].p_filesz = notesz;
    680    phdrs[0].p_memsz = 0;
    681    phdrs[0].p_flags = 0;
    682    phdrs[0].p_align = 0;
    683 
    684    off += notesz;
    685 
    686    off = VG_PGROUNDUP(off);
    687 
    688    for(i = 0, idx = 1; i < n_seg_starts; i++) {
    689       seg = VG_(am_find_nsegment(seg_starts[i]));
    690 
    691       if (!may_dump(seg))
    692 	 continue;
    693 
    694       fill_phdr(&phdrs[idx], seg, off,
    695                 (seg->end - seg->start + 1 + off) < max_size);
    696 
    697       off += phdrs[idx].p_filesz;
    698 
    699       idx++;
    700    }
    701 
    702    /* write everything out */
    703    VG_(write)(core_fd, &ehdr, sizeof(ehdr));
    704    VG_(write)(core_fd, phdrs, sizeof(*phdrs) * num_phdrs);
    705 
    706    for(note = notelist; note != NULL; note = note->next)
    707       write_note(core_fd, note);
    708 
    709    VG_(lseek)(core_fd, phdrs[1].p_offset, VKI_SEEK_SET);
    710 
    711    for(i = 0, idx = 1; i < n_seg_starts; i++) {
    712       seg = VG_(am_find_nsegment(seg_starts[i]));
    713 
    714       if (!should_dump(seg))
    715 	 continue;
    716 
    717       if (phdrs[idx].p_filesz > 0) {
    718 	 vg_assert(VG_(lseek)(core_fd, phdrs[idx].p_offset, VKI_SEEK_SET)
    719                    == phdrs[idx].p_offset);
    720 	 vg_assert(seg->end - seg->start + 1 >= phdrs[idx].p_filesz);
    721 
    722 	 (void)VG_(write)(core_fd, (void *)seg->start, phdrs[idx].p_filesz);
    723       }
    724       idx++;
    725    }
    726 
    727    VG_(free)(seg_starts);
    728 
    729    VG_(close)(core_fd);
    730 }
    731 
    732 void VG_(make_coredump)(ThreadId tid, const vki_siginfo_t *si, ULong max_size)
    733 {
    734    make_elf_coredump(tid, si, max_size);
    735 }
    736 
    737 #endif // defined(VGO_linux)
    738 
    739 /*--------------------------------------------------------------------*/
    740 /*--- end                                                          ---*/
    741 /*--------------------------------------------------------------------*/
    742