mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-05 03:39:02 +00:00
e0491636b5
file so that we have a chance of using gcore on non-i386 platforms. Use linker sets to reduce the registration glue. Remove md-sparc.c, we do not have an a.out sparc32 port. aoutcore.c was repocopied from gcore.c.
242 lines
6.8 KiB
C
242 lines
6.8 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1992, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#if 0
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)gcore.c 8.2 (Berkeley) 9/23/93";
|
|
#endif /* not lint */
|
|
#endif
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* Originally written by Eric Cooper in Fall 1981.
|
|
* Inspired by a version 6 program by Len Levin, 1978.
|
|
* Several pieces of code lifted from Bill Joy's 4BSD ps.
|
|
* Most recently, hacked beyond recognition for 4.4BSD by Steven McCanne,
|
|
* Lawrence Berkeley Laboratory.
|
|
*
|
|
* Portions of this software were developed by the Computer Systems
|
|
* Engineering group at Lawrence Berkeley Laboratory under DARPA
|
|
* contract BG 91-66 and contributed to Berkeley.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/user.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/linker_set.h>
|
|
|
|
#include <arpa/inet.h>
|
|
#include <machine/elf.h>
|
|
#include <machine/vmparam.h>
|
|
|
|
#include <a.out.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <kvm.h>
|
|
#include <limits.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "extern.h"
|
|
|
|
static void datadump(int, int, struct kinfo_proc *, u_long, int);
|
|
static void userdump(int, struct kinfo_proc *, u_long, int);
|
|
|
|
static kvm_t *kd;
|
|
|
|
static int data_offset;
|
|
static struct kinfo_proc *ki;
|
|
|
|
static int
|
|
aoutident(int efd, pid_t pid, char *binfile)
|
|
{
|
|
struct exec exec;
|
|
int cnt;
|
|
uid_t uid;
|
|
char errbuf[_POSIX2_LINE_MAX];
|
|
|
|
cnt = read(efd, &exec, sizeof(exec));
|
|
if (cnt != sizeof(exec))
|
|
return (0);
|
|
if (!N_BADMAG(exec)) {
|
|
/*
|
|
* This legacy a.out support uses the kvm interface instead
|
|
* of procfs.
|
|
*/
|
|
kd = kvm_openfiles(0, 0, 0, O_RDONLY, errbuf);
|
|
if (kd == NULL)
|
|
errx(1, "%s", errbuf);
|
|
|
|
uid = getuid();
|
|
|
|
ki = kvm_getprocs(kd, KERN_PROC_PID, pid, &cnt);
|
|
if (ki == NULL || cnt != 1)
|
|
errx(1, "%d: not found", pid);
|
|
|
|
if (ki->ki_ruid != uid && uid != 0)
|
|
errx(1, "%d: not owner", pid);
|
|
|
|
if (ki->ki_stat == SZOMB)
|
|
errx(1, "%d: zombie", pid);
|
|
|
|
if (ki->ki_flag & P_WEXIT)
|
|
errx(1, "%d: process exiting", pid);
|
|
if (ki->ki_flag & P_SYSTEM) /* Swapper or pagedaemon. */
|
|
errx(1, "%d: system process", pid);
|
|
if (exec.a_text != ptoa(ki->ki_tsize))
|
|
errx(1, "The executable %s does not belong to"
|
|
" process %d!\n"
|
|
"Text segment size (in bytes): executable %ld,"
|
|
" process %d", binfile, pid, exec.a_text,
|
|
ptoa(ki->ki_tsize));
|
|
data_offset = N_DATOFF(exec);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* core --
|
|
* Build the core file.
|
|
*/
|
|
void
|
|
aoutcore(int efd, int fd, pid_t pid)
|
|
{
|
|
union {
|
|
struct user user;
|
|
struct {
|
|
char uabytes[ctob(UAREA_PAGES)];
|
|
char ksbytes[ctob(KSTACK_PAGES)];
|
|
} bytes;
|
|
} uarea;
|
|
int tsize = ki->ki_tsize;
|
|
int dsize = ki->ki_dsize;
|
|
int ssize = ki->ki_ssize;
|
|
int cnt;
|
|
|
|
/* Read in user struct */
|
|
cnt = kvm_read(kd, (u_long)ki->ki_addr, uarea.bytes.uabytes,
|
|
ctob(UAREA_PAGES));
|
|
if (cnt != ctob(UAREA_PAGES))
|
|
errx(1, "read upages structure: %s",
|
|
cnt > 0 ? strerror(EIO) : strerror(errno));
|
|
|
|
cnt = kvm_read(kd, (u_long)ki->ki_kstack, uarea.bytes.ksbytes,
|
|
ctob(KSTACK_PAGES));
|
|
if (cnt != ctob(KSTACK_PAGES))
|
|
errx(1, "read kstack structure: %s",
|
|
cnt > 0 ? strerror(EIO) : strerror(errno));
|
|
|
|
/*
|
|
* Fill in the eproc vm parameters, since these are garbage unless
|
|
* the kernel is dumping core or something.
|
|
*/
|
|
uarea.user.u_kproc = *ki;
|
|
|
|
/* Dump user area */
|
|
cnt = write(fd, &uarea, sizeof(uarea));
|
|
if (cnt != sizeof(uarea))
|
|
errx(1, "write user structure: %s",
|
|
cnt > 0 ? strerror(EIO) : strerror(errno));
|
|
|
|
/* Dump data segment */
|
|
datadump(efd, fd, ki, USRTEXT + ctob(tsize), dsize);
|
|
|
|
/* Dump stack segment */
|
|
userdump(fd, ki, USRSTACK - ctob(ssize), ssize);
|
|
}
|
|
|
|
void
|
|
datadump(int efd, int fd, struct kinfo_proc *kp, u_long addr, int npage)
|
|
{
|
|
int cc, delta;
|
|
char buffer[PAGE_SIZE];
|
|
|
|
delta = data_offset - addr;
|
|
while (--npage >= 0) {
|
|
cc = kvm_uread(kd, kp, addr, buffer, PAGE_SIZE);
|
|
if (cc != PAGE_SIZE) {
|
|
/* Try to read the page from the executable. */
|
|
if (lseek(efd, (off_t)addr + delta, SEEK_SET) == -1)
|
|
err(1, "seek executable");
|
|
cc = read(efd, buffer, sizeof(buffer));
|
|
if (cc != sizeof(buffer)) {
|
|
if (cc < 0)
|
|
err(1, "read executable");
|
|
else /* Assume untouched bss page. */
|
|
bzero(buffer, sizeof(buffer));
|
|
}
|
|
}
|
|
cc = write(fd, buffer, PAGE_SIZE);
|
|
if (cc != PAGE_SIZE)
|
|
errx(1, "write data segment: %s",
|
|
cc > 0 ? strerror(EIO) : strerror(errno));
|
|
addr += PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
void
|
|
userdump(int fd, struct kinfo_proc *kp, u_long addr, int npage)
|
|
{
|
|
int cc;
|
|
char buffer[PAGE_SIZE];
|
|
|
|
while (--npage >= 0) {
|
|
cc = kvm_uread(kd, kp, addr, buffer, PAGE_SIZE);
|
|
if (cc != PAGE_SIZE)
|
|
/* Could be an untouched fill-with-zero page. */
|
|
bzero(buffer, PAGE_SIZE);
|
|
cc = write(fd, buffer, PAGE_SIZE);
|
|
if (cc != PAGE_SIZE)
|
|
errx(1, "write stack segment: %s",
|
|
cc > 0 ? strerror(EIO) : strerror(errno));
|
|
addr += PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
struct dumpers aoutdump = { aoutident, aoutcore };
|
|
TEXT_SET(dumpset, aoutdump);
|