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backends/linux-core-note.c
316 строк
9 KB
Ilya Leoshkevich
Initialize reglocs for VMCOREINFO
08 фев 2023, 20:22
08 фев 2023, 20:22
6cb1547
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/* Common core note type descriptions for Linux. Copyright (C) 2007-2010 Red Hat, Inc. Copyright (C) H.J. Lu <hjl.tools@gmail.com>, 2015. This file is part of elfutils. This file is free software; you can redistribute it and/or modify it under the terms of either * the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version or * the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version or both in parallel, as here. elfutils is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received copies of the GNU General Public License and the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <string.h> /* The including CPU_corenote.c file provides prstatus_regs and defines macros ULONG, [PUG]ID_T, and ALIGN_*, TYPE_*. Here we describe the common layout used in <linux/elfcore.h>. */ #define CHAR int8_t #define ALIGN_CHAR 1 #define TYPE_CHAR ELF_T_BYTE #define SHORT uint16_t #define ALIGN_SHORT 2 #define TYPE_SHORT ELF_T_HALF #define INT int32_t #ifndef ALIGN_INT # define ALIGN_INT 4 #endif #define TYPE_INT ELF_T_SWORD #ifndef PR_REG # define PR_REG ULONG #endif #ifndef ALIGN_PR_REG # define ALIGN_PR_REG ALIGN_ULONG #endif #ifndef PRPSINFO_UID_T # define PRPSINFO_UID_T UID_T # define ALIGN_PRPSINFO_UID_T ALIGN_UID_T # define TYPE_PRPSINFO_UID_T TYPE_UID_T #endif #ifndef PRPSINFO_GID_T # define PRPSINFO_GID_T GID_T # define ALIGN_PRPSINFO_GID_T ALIGN_GID_T # define TYPE_PRPSINFO_GID_T TYPE_GID_T #endif #define FIELD(type, name) type name __attribute__ ((aligned (ALIGN_##type))) struct EBLHOOK(siginfo) { FIELD (INT, si_signo); FIELD (INT, si_code); FIELD (INT, si_errno); }; struct EBLHOOK(timeval) { FIELD (ULONG, tv_sec); FIELD (ULONG, tv_usec); }; /* On sparc64, tv_usec (suseconds_t) is actually 32 bits with 32 bits padding. The 'T'|0x80 value for .format indicates this as a special kludge. */ #if SUSECONDS_HALF # define TIMEVAL_FIELD(name) FIELD (time, ULONG, name, 'T'|0x80, .count = 2) #else # define TIMEVAL_FIELD(name) FIELD (time, ULONG, name, 'T', .count = 2) #endif struct EBLHOOK(prstatus) { struct EBLHOOK(siginfo) pr_info; FIELD (SHORT, pr_cursig); FIELD (ULONG, pr_sigpend); FIELD (ULONG, pr_sighold); FIELD (PID_T, pr_pid); FIELD (PID_T, pr_ppid); FIELD (PID_T, pr_pgrp); FIELD (PID_T, pr_sid); struct EBLHOOK(timeval) pr_utime; struct EBLHOOK(timeval) pr_stime; struct EBLHOOK(timeval) pr_cutime; struct EBLHOOK(timeval) pr_cstime; struct { FIELD (PR_REG, pr_reg[PRSTATUS_REGS_SIZE / sizeof (PR_REG)]); } #ifdef ALIGN_PR_REG __attribute__ ((aligned (ALIGN_PR_REG))) #endif ; FIELD (INT, pr_fpvalid); } #ifdef ALIGN_PRSTATUS attribute_packed __attribute__ ((aligned (ALIGN_PRSTATUS))) #endif ; #define FNAMESZ 16 #define PRARGSZ 80 struct EBLHOOK(prpsinfo) { FIELD (CHAR, pr_state); FIELD (CHAR, pr_sname); FIELD (CHAR, pr_zomb); FIELD (CHAR, pr_nice); FIELD (ULONG, pr_flag); FIELD (PRPSINFO_UID_T, pr_uid); FIELD (PRPSINFO_GID_T, pr_gid); FIELD (PID_T, pr_pid); FIELD (PID_T, pr_ppid); FIELD (PID_T, pr_pgrp); FIELD (PID_T, pr_sid); FIELD (CHAR, pr_fname[FNAMESZ]); FIELD (CHAR, pr_psargs[PRARGSZ]); }; #undef FIELD #define FIELD(igroup, itype, item, fmt, ...) \ { \ .name = #item, \ .group = #igroup, \ .offset = offsetof (struct EBLHOOK(prstatus), pr_##item), \ .type = TYPE_##itype, \ .format = fmt, \ __VA_ARGS__ \ } static const Ebl_Core_Item prstatus_items[] = { FIELD (signal, INT, info.si_signo, 'd'), FIELD (signal, INT, info.si_code, 'd'), FIELD (signal, INT, info.si_errno, 'd'), FIELD (signal, SHORT, cursig, 'd'), /* Use different group name for a newline delimiter. */ FIELD (signal2, ULONG, sigpend, 'B'), FIELD (signal3, ULONG, sighold, 'B'), FIELD (identity, PID_T, pid, 'd', .thread_identifier = true), FIELD (identity, PID_T, ppid, 'd'), FIELD (identity, PID_T, pgrp, 'd'), FIELD (identity, PID_T, sid, 'd'), TIMEVAL_FIELD (utime), TIMEVAL_FIELD (stime), TIMEVAL_FIELD (cutime), TIMEVAL_FIELD (cstime), #ifdef PRSTATUS_REGSET_ITEMS PRSTATUS_REGSET_ITEMS, #endif FIELD (register, INT, fpvalid, 'd'), }; #undef FIELD #define FIELD(igroup, itype, item, fmt, ...) \ { \ .name = #item, \ .group = #igroup, \ .offset = offsetof (struct EBLHOOK(prpsinfo), pr_##item), \ .type = TYPE_##itype, \ .format = fmt, \ __VA_ARGS__ \ } static const Ebl_Core_Item prpsinfo_items[] = { FIELD (state, CHAR, state, 'd'), FIELD (state, CHAR, sname, 'c'), FIELD (state, CHAR, zomb, 'd'), FIELD (state, CHAR, nice, 'd'), FIELD (state, ULONG, flag, 'x'), FIELD (identity, PRPSINFO_UID_T, uid, 'd'), FIELD (identity, PRPSINFO_GID_T, gid, 'd'), FIELD (identity, PID_T, pid, 'd'), FIELD (identity, PID_T, ppid, 'd'), FIELD (identity, PID_T, pgrp, 'd'), FIELD (identity, PID_T, sid, 'd'), FIELD (command, CHAR, fname, 's', .count = FNAMESZ), FIELD (command, CHAR, psargs, 's', .count = PRARGSZ), }; static const Ebl_Core_Item vmcoreinfo_items[] = { { .type = ELF_T_BYTE, .format = '\n' } }; #undef FIELD int EBLHOOK(core_note) (const GElf_Nhdr *nhdr, const char *name, GElf_Word *regs_offset, size_t *nregloc, const Ebl_Register_Location **reglocs, size_t *nitems, const Ebl_Core_Item **items) { switch (nhdr->n_namesz) { case sizeof "CORE" - 1: /* Buggy old Linux kernels. */ if (memcmp (name, "CORE", nhdr->n_namesz) == 0) break; return 0; case sizeof "CORE": if (memcmp (name, "CORE", nhdr->n_namesz) == 0) break; /* Buggy old Linux kernels didn't terminate "LINUX". */ FALLTHROUGH; case sizeof "LINUX": if (memcmp (name, "LINUX", nhdr->n_namesz) == 0) break; return 0; case sizeof "VMCOREINFO": if (nhdr->n_type != 0 || memcmp (name, "VMCOREINFO", sizeof "VMCOREINFO") != 0) return 0; *regs_offset = 0; *nregloc = 0; *reglocs = NULL; *nitems = 1; *items = vmcoreinfo_items; return 1; default: return 0; } switch (nhdr->n_type) { case NT_PRSTATUS: if (nhdr->n_descsz != sizeof (struct EBLHOOK(prstatus))) return 0; *regs_offset = offsetof (struct EBLHOOK(prstatus), pr_reg); *nregloc = sizeof prstatus_regs / sizeof prstatus_regs[0]; *reglocs = prstatus_regs; *nitems = sizeof prstatus_items / sizeof prstatus_items[0]; *items = prstatus_items; return 1; case NT_PRPSINFO: if (nhdr->n_descsz != sizeof (struct EBLHOOK(prpsinfo))) return 0; *regs_offset = 0; *nregloc = 0; *reglocs = NULL; *nitems = sizeof prpsinfo_items / sizeof prpsinfo_items[0]; *items = prpsinfo_items; return 1; #define EXTRA_REGSET(type, size, table) \ case type: \ if (nhdr->n_descsz != size) \ return 0; \ *regs_offset = 0; \ *nregloc = sizeof table / sizeof table[0]; \ *reglocs = table; \ *nitems = 0; \ *items = NULL; \ return 1; #define EXTRA_REGSET_ITEMS(type, size, table, extra_items) \ case type: \ if (nhdr->n_descsz != size) \ return 0; \ *regs_offset = 0; \ *nregloc = sizeof table / sizeof table[0]; \ *reglocs = table; \ *nitems = sizeof extra_items / sizeof extra_items[0]; \ *items = extra_items; \ return 1; #define EXTRA_ITEMS(type, size, extra_items) \ case type: \ if (nhdr->n_descsz != size) \ return 0; \ *regs_offset = 0; \ *nregloc = 0; \ *reglocs = NULL; \ *nitems = sizeof extra_items / sizeof extra_items[0]; \ *items = extra_items; \ return 1; #ifdef FPREGSET_SIZE EXTRA_REGSET (NT_FPREGSET, FPREGSET_SIZE, fpregset_regs) #endif #ifdef EXTRA_NOTES EXTRA_NOTES #endif } return 0; }