diff options
Diffstat (limited to 'usr.bin/procstat/procstat_auxv.c')
| -rw-r--r-- | usr.bin/procstat/procstat_auxv.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/usr.bin/procstat/procstat_auxv.c b/usr.bin/procstat/procstat_auxv.c new file mode 100644 index 0000000..9bf7afb --- /dev/null +++ b/usr.bin/procstat/procstat_auxv.c @@ -0,0 +1,244 @@ +/*- + * 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; + case AT_COUNT: + PRINT(AT_COUNT, %ld, (long)auxv[i].a_un.a_val); + break; + default: + PRINT_UNKNOWN(auxv[i].a_type, auxv[i].a_un.a_val); + break; + } + } + printf("\n"); +} + |
