944cf37bb5
The intent is to provide bsd-specific flags relevant to interpreter
and C runtime. I did not want to reuse AT_FLAGS which is common ELF
auxv entry.
Use bsdflags to report kernel support for sigfastblock(2). This
allows rtld and libthr to safely infer the syscall presence without
SIGSYS. The tunable kern.elf{32,64}.sigfastblock blocks reporting.
Tested by: pho
Disscussed with: cem, emaste, jilles
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D12773
216 lines
6.4 KiB
C
216 lines
6.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 Mikolaj Golub
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* Copyright (c) 2015 Allan Jude <allanjude@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/elf.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <vm/vm.h>
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#include <err.h>
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#include <errno.h>
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#include <libprocstat.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "procstat.h"
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void
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procstat_auxv(struct procstat *procstat, struct kinfo_proc *kipp)
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{
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Elf_Auxinfo *auxv;
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u_int count, i;
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static char prefix[256];
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if ((procstat_opts & PS_OPT_NOHEADER) == 0)
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xo_emit("{T:/%5s %-16s %-16s %-16s}\n", "PID", "COMM", "AUXV",
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"VALUE");
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auxv = procstat_getauxv(procstat, kipp, &count);
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if (auxv == NULL)
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return;
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snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
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kipp->ki_comm);
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xo_emit("{e:process_id/%5d/%d}{e:command/%-16s/%s}", kipp->ki_pid,
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kipp->ki_comm);
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for (i = 0; i < count; i++) {
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switch(auxv[i].a_type) {
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case AT_NULL:
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return;
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case AT_IGNORE:
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break;
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case AT_EXECFD:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_EXECFD/%ld}\n",
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prefix, "AT_EXECFD", (long)auxv[i].a_un.a_val);
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break;
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case AT_PHDR:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_PHDR/%p}\n",
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prefix, "AT_PHDR", auxv[i].a_un.a_ptr);
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break;
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case AT_PHENT:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_PHENT/%ld}\n",
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prefix, "AT_PHENT", (long)auxv[i].a_un.a_val);
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break;
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case AT_PHNUM:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_PHNUM/%ld}\n",
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prefix, "AT_PHNUM", (long)auxv[i].a_un.a_val);
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break;
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case AT_PAGESZ:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_PAGESZ/%ld}\n",
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prefix, "AT_PAGESZ", (long)auxv[i].a_un.a_val);
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break;
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case AT_BASE:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_BASE/%p}\n",
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prefix, "AT_BASE", auxv[i].a_un.a_ptr);
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break;
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case AT_FLAGS:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_FLAGS/%#lx}\n",
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prefix, "AT_FLAGS", (u_long)auxv[i].a_un.a_val);
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break;
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case AT_ENTRY:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_ENTRY/%p}\n",
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prefix, "AT_ENTRY", auxv[i].a_un.a_ptr);
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break;
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#ifdef AT_NOTELF
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case AT_NOTELF:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_NOTELF/%ld}\n",
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prefix, "AT_NOTELF", (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_UID
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case AT_UID:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_UID/%ld}\n",
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prefix, "AT_UID", (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_EUID
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case AT_EUID:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_EUID/%ld}\n",
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prefix, "AT_EUID", (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_GID
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case AT_GID:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_GID/%ld}\n",
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prefix, "AT_GID", (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_EGID
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case AT_EGID:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_EGID/%ld}\n",
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prefix, "AT_EGID", (long)auxv[i].a_un.a_val);
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break;
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#endif
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case AT_EXECPATH:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_EXECPATH/%p}\n",
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prefix, "AT_EXECPATH", auxv[i].a_un.a_ptr);
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break;
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case AT_CANARY:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_CANARY/%p}\n",
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prefix, "AT_CANARY", auxv[i].a_un.a_ptr);
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break;
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case AT_CANARYLEN:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_CANARYLEN/%ld}\n",
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prefix, "AT_CANARYLEN", (long)auxv[i].a_un.a_val);
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break;
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case AT_OSRELDATE:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_OSRELDATE/%ld}\n",
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prefix, "AT_OSRELDATE", (long)auxv[i].a_un.a_val);
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break;
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case AT_NCPUS:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_NCPUS/%ld}\n",
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prefix, "AT_NCPUS", (long)auxv[i].a_un.a_val);
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break;
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case AT_PAGESIZES:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_PAGESIZES/%p}\n",
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prefix, "AT_PAGESIZES", auxv[i].a_un.a_ptr);
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break;
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case AT_PAGESIZESLEN:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}"
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"{:AT_PAGESIZESLEN/%ld}\n", prefix,
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"AT_PAGESIZESLEN", (long)auxv[i].a_un.a_val);
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break;
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case AT_STACKPROT:
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if ((auxv[i].a_un.a_val & VM_PROT_EXECUTE) != 0)
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}"
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"{:AT_STACKPROT/%s}\n", prefix,
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"AT_STACKPROT", "EXECUTABLE");
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else
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}"
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"{:AT_STACKPROT/%s}\n", prefix,
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"AT_STACKPROT", "NONEXECUTABLE");
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break;
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#ifdef AT_TIMEKEEP
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case AT_TIMEKEEP:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_TIMEKEEP/%p}\n",
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prefix, "AT_TIMEKEEP", auxv[i].a_un.a_ptr);
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break;
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#endif
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#ifdef AT_EHDRFLAGS
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case AT_EHDRFLAGS:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_EHDRFLAGS/%#lx}\n",
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prefix, "AT_EHDRFLAGS", (u_long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_HWCAP
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case AT_HWCAP:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_HWCAP/%#lx}\n",
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prefix, "AT_HWCAP", (u_long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_HWCAP2
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case AT_HWCAP2:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_HWCAP2/%#lx}\n",
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prefix, "AT_HWCAP2", (u_long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_BSDFLAGS
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case AT_BSDFLAGS:
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xo_emit("{dw:/%s}{Lw:/%-16s/%s}{:AT_BSDFLAGS/%#lx}\n",
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prefix, "AT_BSDFLAGS", (u_long)auxv[i].a_un.a_val);
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break;
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#endif
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default:
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xo_emit("{dw:/%s}{Lw:/%16ld/%ld}{:UNKNOWN/%#lx}\n",
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prefix, auxv[i].a_type, auxv[i].a_un.a_val);
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break;
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}
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}
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xo_emit("\n");
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procstat_freeauxv(procstat, auxv);
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}
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