/usr.bin/procstat/procstat_auxv.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 246 lines · 196 code · 18 blank · 32 comment · 30 complexity · c69837d7cdaab8ce319729281af26b40 MD5 · raw file
- /*-
- * Copyright (c) 2011 Mikolaj Golub
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
- #include <sys/param.h>
- #include <sys/elf.h>
- #include <sys/sysctl.h>
- #include <sys/user.h>
- #include <vm/vm.h>
- #include <err.h>
- #include <errno.h>
- #include <libprocstat.h>
- #include <limits.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "procstat.h"
- #define PROC_AUXV_MAX 256
- static Elf_Auxinfo auxv[PROC_AUXV_MAX];
- static char prefix[256];
- #if __ELF_WORD_SIZE == 64
- static Elf32_Auxinfo auxv32[PROC_AUXV_MAX];
- static const char *elf32_sv_names[] = {
- "Linux ELF32",
- "FreeBSD ELF32",
- };
- static int
- is_elf32(pid_t pid)
- {
- int error, name[4];
- size_t len, i;
- static char sv_name[256];
- name[0] = CTL_KERN;
- name[1] = KERN_PROC;
- name[2] = KERN_PROC_SV_NAME;
- name[3] = pid;
- len = sizeof(sv_name);
- error = sysctl(name, 4, sv_name, &len, NULL, 0);
- if (error != 0 || len == 0)
- return (0);
- for (i = 0; i < sizeof(elf32_sv_names) / sizeof(*elf32_sv_names); i++) {
- if (strncmp(sv_name, elf32_sv_names[i], sizeof(sv_name)) == 0)
- return (1);
- }
- return (0);
- }
- static size_t
- retrieve_auxv32(pid_t pid)
- {
- int name[4];
- size_t len, i;
- void *ptr;
- name[0] = CTL_KERN;
- name[1] = KERN_PROC;
- name[2] = KERN_PROC_AUXV;
- name[3] = pid;
- len = sizeof(auxv32);
- if (sysctl(name, 4, auxv32, &len, NULL, 0) == -1) {
- if (errno != ESRCH && errno != EPERM)
- warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
- return (0);
- }
- for (i = 0; i < len; i++) {
- /*
- * XXX: We expect that values for a_type on a 32-bit platform
- * are directly mapped to those on 64-bit one, which is not
- * necessarily true.
- */
- auxv[i].a_type = auxv32[i].a_type;
- ptr = &auxv32[i].a_un;
- auxv[i].a_un.a_val = *((uint32_t *)ptr);
- }
- return (len);
- }
- #endif /* __ELF_WORD_SIZE == 64 */
- #define PRINT(name, spec, val) \
- printf("%s %-16s " #spec "\n", prefix, #name, (val))
- #define PRINT_UNKNOWN(type, val) \
- printf("%s %16ld %#lx\n", prefix, (long)type, (u_long)(val))
- static size_t
- retrieve_auxv(pid_t pid)
- {
- int name[4];
- size_t len;
- #if __ELF_WORD_SIZE == 64
- if (is_elf32(pid))
- return (retrieve_auxv32(pid));
- #endif
- name[0] = CTL_KERN;
- name[1] = KERN_PROC;
- name[2] = KERN_PROC_AUXV;
- name[3] = pid;
- len = sizeof(auxv);
- if (sysctl(name, 4, auxv, &len, NULL, 0) == -1) {
- if (errno != ESRCH && errno != EPERM)
- warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
- return (0);
- }
- return (len);
- }
- void
- procstat_auxv(struct kinfo_proc *kipp)
- {
- size_t len, i;
- if (!hflag)
- printf("%5s %-16s %-16s %-16s\n", "PID", "COMM", "AUXV", "VALUE");
- len = retrieve_auxv(kipp->ki_pid);
- if (len == 0)
- return;
- snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
- kipp->ki_comm);
- for (i = 0; i < len; i++) {
- switch(auxv[i].a_type) {
- case AT_NULL:
- return;
- case AT_IGNORE:
- break;
- case AT_EXECFD:
- PRINT(AT_EXECFD, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_PHDR:
- PRINT(AT_PHDR, %p, auxv[i].a_un.a_ptr);
- break;
- case AT_PHENT:
- PRINT(AT_PHENT, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_PHNUM:
- PRINT(AT_PHNUM, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_PAGESZ:
- PRINT(AT_PAGESZ, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_BASE:
- PRINT(AT_BASE, %p, auxv[i].a_un.a_ptr);
- break;
- case AT_FLAGS:
- PRINT(AT_FLAGS, %#lx, (u_long)auxv[i].a_un.a_val);
- break;
- case AT_ENTRY:
- PRINT(AT_ENTRY, %p, auxv[i].a_un.a_ptr);
- break;
- #ifdef AT_NOTELF
- case AT_NOTELF:
- PRINT(AT_NOTELF, %ld, (long)auxv[i].a_un.a_val);
- break;
- #endif
- #ifdef AT_UID
- case AT_UID:
- PRINT(AT_UID, %ld, (long)auxv[i].a_un.a_val);
- break;
- #endif
- #ifdef AT_EUID
- case AT_EUID:
- PRINT(AT_EUID, %ld, (long)auxv[i].a_un.a_val);
- break;
- #endif
- #ifdef AT_GID
- case AT_GID:
- PRINT(AT_GID, %ld, (long)auxv[i].a_un.a_val);
- break;
- #endif
- #ifdef AT_EGID
- case AT_EGID:
- PRINT(AT_EGID, %ld, (long)auxv[i].a_un.a_val);
- break;
- #endif
- case AT_EXECPATH:
- PRINT(AT_EXECPATH, %p, auxv[i].a_un.a_ptr);
- break;
- case AT_CANARY:
- PRINT(AT_CANARY, %p, auxv[i].a_un.a_ptr);
- break;
- case AT_CANARYLEN:
- PRINT(AT_CANARYLEN, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_OSRELDATE:
- PRINT(AT_OSRELDATE, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_NCPUS:
- PRINT(AT_NCPUS, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_PAGESIZES:
- PRINT(AT_PAGESIZES, %p, auxv[i].a_un.a_ptr);
- break;
- case AT_PAGESIZESLEN:
- PRINT(AT_PAGESIZESLEN, %ld, (long)auxv[i].a_un.a_val);
- break;
- case AT_STACKPROT:
- if ((auxv[i].a_un.a_val & VM_PROT_EXECUTE) != 0)
- PRINT(AT_STACKPROT, %s, "NONEXECUTABLE");
- else
- PRINT(AT_STACKPROT, %s, "EXECUTABLE");
- break;
- #ifdef AT_TIMEKEEP
- case AT_TIMEKEEP:
- PRINT(AT_TIMEKEEP, %p, auxv[i].a_un.a_ptr);
- break;
- #endif
- default:
- PRINT_UNKNOWN(auxv[i].a_type, auxv[i].a_un.a_val);
- break;
- }
- }
- printf("\n");
- }