Use a crowbar to move the a.out code out of gcore.c and into its own
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.
This commit is contained in:
parent
af656bf76b
commit
e0491636b5
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=103299
@ -3,13 +3,11 @@
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PROG= gcore
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SRCS= elfcore.c gcore.c
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.if ${MACHINE_ARCH} == i386
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SRCS+= aoutcore.c
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DPADD= ${LIBKVM}
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LDADD= -lkvm
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.if ${MACHINE_ARCH} != "sparc"
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SRCS+= md-nop.c
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.else
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SRCS+= md-${MACHINE_ARCH}.c
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.endif
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.include <bsd.prog.mk>
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@ -63,6 +63,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/sysctl.h>
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#include <sys/linker_set.h>
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#include <arpa/inet.h>
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#include <machine/elf.h>
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@ -81,75 +82,26 @@ __FBSDID("$FreeBSD$");
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#include "extern.h"
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static void core(int, int, struct kinfo_proc *);
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static void datadump(int, int, struct kinfo_proc *, u_long, int);
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static void killed(int);
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static void restart_target(void);
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static void usage(void) __dead2;
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static void userdump(int, struct kinfo_proc *, u_long, int);
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kvm_t *kd;
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static kvm_t *kd;
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static int data_offset;
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static pid_t pid;
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static struct kinfo_proc *ki;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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static int
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aoutident(int efd, pid_t pid, char *binfile)
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{
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struct kinfo_proc *ki = NULL;
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struct exec exec;
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int ch, cnt, efd, fd, sflag;
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int cnt;
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uid_t uid;
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char *binfile, *corefile;
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char errbuf[_POSIX2_LINE_MAX], fname[MAXPATHLEN];
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int is_aout;
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sflag = 0;
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corefile = NULL;
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while ((ch = getopt(argc, argv, "c:s")) != -1) {
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switch (ch) {
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case 'c':
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corefile = optarg;
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break;
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case 's':
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sflag = 1;
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break;
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default:
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usage();
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break;
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}
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}
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argv += optind;
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argc -= optind;
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/* XXX we should check that the pid argument is really a number */
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switch (argc) {
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case 1:
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pid = atoi(argv[0]);
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asprintf(&binfile, "/proc/%d/file", pid);
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if (binfile == NULL)
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errx(1, "allocation failure");
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break;
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case 2:
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pid = atoi(argv[1]);
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binfile = argv[0];
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break;
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default:
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usage();
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}
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efd = open(binfile, O_RDONLY, 0);
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if (efd < 0)
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err(1, "%s", binfile);
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char errbuf[_POSIX2_LINE_MAX];
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cnt = read(efd, &exec, sizeof(exec));
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if (cnt != sizeof(exec))
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errx(1, "%s exec header: %s",
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binfile, cnt > 0 ? strerror(EIO) : strerror(errno));
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return (0);
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if (!N_BADMAG(exec)) {
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is_aout = 1;
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/*
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* This legacy a.out support uses the kvm interface instead
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* of procfs.
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@ -181,36 +133,9 @@ main(argc, argv)
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" process %d", binfile, pid, exec.a_text,
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ptoa(ki->ki_tsize));
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data_offset = N_DATOFF(exec);
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} else if (IS_ELF(*(Elf_Ehdr *)&exec)) {
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is_aout = 0;
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close(efd);
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} else
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errx(1, "Invalid executable file");
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if (corefile == NULL) {
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(void)snprintf(fname, sizeof(fname), "core.%d", pid);
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corefile = fname;
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return (1);
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}
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fd = open(corefile, O_RDWR|O_CREAT|O_TRUNC, DEFFILEMODE);
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if (fd < 0)
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err(1, "%s", corefile);
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if (sflag) {
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signal(SIGHUP, killed);
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signal(SIGINT, killed);
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signal(SIGTERM, killed);
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if (kill(pid, SIGSTOP) == -1)
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err(1, "%d: stop signal", pid);
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atexit(restart_target);
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}
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if (is_aout)
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core(efd, fd, ki);
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else
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elf_coredump(fd, pid);
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(void)close(fd);
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exit(0);
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return (0);
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}
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/*
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@ -218,10 +143,7 @@ main(argc, argv)
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* Build the core file.
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*/
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void
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core(efd, fd, ki)
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int efd;
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int fd;
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struct kinfo_proc *ki;
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aoutcore(int efd, int fd, pid_t pid)
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{
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union {
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struct user user;
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@ -265,20 +187,12 @@ core(efd, fd, ki)
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/* Dump stack segment */
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userdump(fd, ki, USRSTACK - ctob(ssize), ssize);
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/* Dump machine dependent portions of the core. */
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md_core(kd, fd, ki);
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}
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void
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datadump(efd, fd, kp, addr, npage)
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register int efd;
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register int fd;
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struct kinfo_proc *kp;
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register u_long addr;
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register int npage;
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datadump(int efd, int fd, struct kinfo_proc *kp, u_long addr, int npage)
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{
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register int cc, delta;
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int cc, delta;
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char buffer[PAGE_SIZE];
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delta = data_offset - addr;
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@ -304,29 +218,10 @@ datadump(efd, fd, kp, addr, npage)
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}
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}
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static void
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killed(sig)
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int sig;
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{
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restart_target();
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signal(sig, SIG_DFL);
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kill(getpid(), sig);
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}
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static void
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restart_target()
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{
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kill(pid, SIGCONT);
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}
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void
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userdump(fd, kp, addr, npage)
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register int fd;
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struct kinfo_proc *kp;
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register u_long addr;
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register int npage;
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userdump(int fd, struct kinfo_proc *kp, u_long addr, int npage)
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{
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register int cc;
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int cc;
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char buffer[PAGE_SIZE];
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while (--npage >= 0) {
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@ -342,9 +237,5 @@ userdump(fd, kp, addr, npage)
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}
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");
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exit(1);
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}
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struct dumpers aoutdump = { aoutident, aoutcore };
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TEXT_SET(dumpset, aoutdump);
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@ -29,6 +29,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/procfs.h>
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#include <sys/linker_set.h>
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#include <machine/elf.h>
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#include <vm/vm_param.h>
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#include <vm/vm.h>
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@ -77,11 +78,26 @@ static void freemap(vm_map_entry_t);
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static void readhdrinfo(pid_t, prstatus_t *, prfpregset_t *, prpsinfo_t *);
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static vm_map_entry_t readmap(pid_t);
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static int
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elf_ident(int efd, pid_t pid, char *binfile)
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{
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Elf_Ehdr hdr;
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int cnt;
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uid_t uid;
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cnt = read(efd, &hdr, sizeof(hdr));
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if (cnt != sizeof(hdr))
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return (0);
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if (IS_ELF(hdr))
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return (1);
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return (0);
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}
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/*
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* Write an ELF coredump for the given pid to the given fd.
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*/
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void
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elf_coredump(int fd, pid_t pid)
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elf_coredump(int efd, int fd, pid_t pid)
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{
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vm_map_entry_t map;
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struct sseg_closure seginfo;
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@ -357,6 +373,7 @@ elf_putnote(void *dst, size_t *off, const char *name, int type,
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static void
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freemap(vm_map_entry_t map)
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{
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while (map != NULL) {
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vm_map_entry_t next = map->next;
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free(map);
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@ -514,3 +531,6 @@ readmap(pid_t pid)
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free(mapbuf);
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return map;
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}
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struct dumpers elfdump = { elf_ident, elf_coredump };
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TEXT_SET(dumpset, elfdump);
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@ -34,9 +34,7 @@
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <kvm.h>
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void err(int, const char *, ...);
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void elf_coredump(int, pid_t);
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void md_core(kvm_t *, int, struct kinfo_proc *);
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struct dumpers {
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int (*ident)(int efd, pid_t pid, char *binfile);
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void (*dump)(int efd, int fd, pid_t pid);
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};
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/sysctl.h>
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#include <sys/linker_set.h>
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#include <arpa/inet.h>
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#include <machine/elf.h>
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#include <machine/vmparam.h>
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#include <a.out.h>
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#include <err.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -81,30 +72,21 @@ __FBSDID("$FreeBSD$");
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#include "extern.h"
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static void core(int, int, struct kinfo_proc *);
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static void datadump(int, int, struct kinfo_proc *, u_long, int);
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static void killed(int);
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static void restart_target(void);
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static void usage(void) __dead2;
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static void userdump(int, struct kinfo_proc *, u_long, int);
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kvm_t *kd;
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static int data_offset;
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static pid_t pid;
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SET_DECLARE(dumpset, struct dumpers);
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int
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main(argc, argv)
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int argc;
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char *argv[];
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main(int argc, char *argv[])
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{
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struct kinfo_proc *ki = NULL;
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struct exec exec;
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int ch, cnt, efd, fd, sflag;
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uid_t uid;
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char *binfile, *corefile;
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char errbuf[_POSIX2_LINE_MAX], fname[MAXPATHLEN];
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int is_aout;
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char fname[MAXPATHLEN];
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struct dumpers **d, *dumper;
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sflag = 0;
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corefile = NULL;
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@ -123,7 +105,6 @@ main(argc, argv)
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}
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argv += optind;
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argc -= optind;
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/* XXX we should check that the pid argument is really a number */
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switch (argc) {
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case 1:
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@ -139,54 +120,20 @@ main(argc, argv)
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default:
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usage();
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}
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efd = open(binfile, O_RDONLY, 0);
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if (efd < 0)
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err(1, "%s", binfile);
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cnt = read(efd, &exec, sizeof(exec));
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if (cnt != sizeof(exec))
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errx(1, "%s exec header: %s",
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binfile, cnt > 0 ? strerror(EIO) : strerror(errno));
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if (!N_BADMAG(exec)) {
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is_aout = 1;
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/*
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* This legacy a.out support uses the kvm interface instead
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* of procfs.
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*/
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kd = kvm_openfiles(0, 0, 0, O_RDONLY, errbuf);
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if (kd == NULL)
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errx(1, "%s", errbuf);
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uid = getuid();
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ki = kvm_getprocs(kd, KERN_PROC_PID, pid, &cnt);
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if (ki == NULL || cnt != 1)
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errx(1, "%d: not found", pid);
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if (ki->ki_ruid != uid && uid != 0)
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errx(1, "%d: not owner", pid);
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if (ki->ki_stat == SZOMB)
|
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errx(1, "%d: zombie", pid);
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|
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if (ki->ki_flag & P_WEXIT)
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errx(1, "%d: process exiting", pid);
|
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if (ki->ki_flag & P_SYSTEM) /* Swapper or pagedaemon. */
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errx(1, "%d: system process", pid);
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if (exec.a_text != ptoa(ki->ki_tsize))
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errx(1, "The executable %s does not belong to"
|
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" process %d!\n"
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"Text segment size (in bytes): executable %ld,"
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" process %d", binfile, pid, exec.a_text,
|
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ptoa(ki->ki_tsize));
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data_offset = N_DATOFF(exec);
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} else if (IS_ELF(*(Elf_Ehdr *)&exec)) {
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is_aout = 0;
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close(efd);
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} else
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dumper = NULL;
|
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SET_FOREACH(d, dumpset) {
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lseek(efd, 0, SEEK_SET);
|
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if (((*d)->ident)(efd, pid, binfile)) {
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dumper = (*d);
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lseek(efd, 0, SEEK_SET);
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break;
|
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}
|
||||
}
|
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if (dumper == NULL)
|
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errx(1, "Invalid executable file");
|
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|
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if (corefile == NULL) {
|
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(void)snprintf(fname, sizeof(fname), "core.%d", pid);
|
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corefile = fname;
|
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@ -194,7 +141,6 @@ main(argc, argv)
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fd = open(corefile, O_RDWR|O_CREAT|O_TRUNC, DEFFILEMODE);
|
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if (fd < 0)
|
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err(1, "%s", corefile);
|
||||
|
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if (sflag) {
|
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signal(SIGHUP, killed);
|
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signal(SIGINT, killed);
|
||||
@ -203,148 +149,32 @@ main(argc, argv)
|
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err(1, "%d: stop signal", pid);
|
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atexit(restart_target);
|
||||
}
|
||||
|
||||
if (is_aout)
|
||||
core(efd, fd, ki);
|
||||
else
|
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elf_coredump(fd, pid);
|
||||
|
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dumper->dump(efd, fd, pid);
|
||||
(void)close(fd);
|
||||
(void)close(efd);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
/*
|
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* core --
|
||||
* Build the core file.
|
||||
*/
|
||||
void
|
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core(efd, fd, ki)
|
||||
int efd;
|
||||
int fd;
|
||||
struct kinfo_proc *ki;
|
||||
{
|
||||
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);
|
||||
|
||||
/* Dump machine dependent portions of the core. */
|
||||
md_core(kd, fd, ki);
|
||||
}
|
||||
|
||||
void
|
||||
datadump(efd, fd, kp, addr, npage)
|
||||
register int efd;
|
||||
register int fd;
|
||||
struct kinfo_proc *kp;
|
||||
register u_long addr;
|
||||
register int npage;
|
||||
{
|
||||
register 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;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
killed(sig)
|
||||
int sig;
|
||||
killed(int sig)
|
||||
{
|
||||
|
||||
restart_target();
|
||||
signal(sig, SIG_DFL);
|
||||
kill(getpid(), sig);
|
||||
}
|
||||
|
||||
static void
|
||||
restart_target()
|
||||
restart_target(void)
|
||||
{
|
||||
|
||||
kill(pid, SIGCONT);
|
||||
}
|
||||
|
||||
void
|
||||
userdump(fd, kp, addr, npage)
|
||||
register int fd;
|
||||
struct kinfo_proc *kp;
|
||||
register u_long addr;
|
||||
register int npage;
|
||||
usage(void)
|
||||
{
|
||||
register 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;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
usage()
|
||||
{
|
||||
(void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");
|
||||
exit(1);
|
||||
}
|
||||
|
@ -1,57 +0,0 @@
|
||||
/*-
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#if 0
|
||||
#ifndef lint
|
||||
static char sccsid[] = "@(#)md-nop.c 8.1 (Berkeley) 6/6/93";
|
||||
#endif /* not lint */
|
||||
#endif
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/sysctl.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <kvm.h>
|
||||
#include "extern.h"
|
||||
|
||||
void
|
||||
md_core(kd, fd, ki)
|
||||
kvm_t *kd __unused;
|
||||
int fd __unused;
|
||||
struct kinfo_proc *ki __unused;
|
||||
{
|
||||
/* Don't need to fix anything for this architecture. */
|
||||
return;
|
||||
}
|
@ -1,189 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 1992, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* This software was developed by the Computer Systems Engineering group
|
||||
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
||||
* contributed to Berkeley.
|
||||
*
|
||||
* 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 char sccsid[] = "@(#)md-sparc.c 8.1 (Berkeley) 6/6/93";
|
||||
#endif /* not lint */
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/file.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/proc.h>
|
||||
#include <sys/user.h>
|
||||
#include <sys/sysctl.h>
|
||||
#include <machine/vmparam.h>
|
||||
|
||||
#include <err.h>
|
||||
#include <kvm.h>
|
||||
#include <unistd.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include "extern.h"
|
||||
|
||||
#ifndef offsetof
|
||||
#define offsetof(s, f) ((int)&((s *)0)->f)
|
||||
#endif
|
||||
|
||||
static void
|
||||
shift_page(fd, off, ssize)
|
||||
register int fd;
|
||||
register off_t off;
|
||||
register int ssize;
|
||||
{
|
||||
char buffer[NBPG];
|
||||
|
||||
(void)lseek(fd, (off_t)-NBPG, SEEK_END);
|
||||
for (; ssize > 0; ssize -= NBPG) {
|
||||
(void)read(fd, buffer, NBPG);
|
||||
(void)write(fd, buffer, NBPG);
|
||||
(void)lseek(fd, (off_t)-2 * NBPG, SEEK_CUR);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Fix up the core image for the sparc. We need to flush any register
|
||||
* windows that are cached in the pcb out to the user stack.
|
||||
* Also, we need to get the trap frame and possible floating point state
|
||||
* from the top of the kernel stack and store it in the pcb.
|
||||
*/
|
||||
void
|
||||
md_core(kd, fd, ki)
|
||||
kvm_t *kd;
|
||||
int fd;
|
||||
struct kinfo_proc *ki;
|
||||
{
|
||||
register struct rwindow *rw;
|
||||
register int nsaved, cc, ssize;
|
||||
register off_t off, s;
|
||||
register u_long sp;
|
||||
struct pcb pcb;
|
||||
struct trapframe tf;
|
||||
|
||||
/*
|
||||
* Before anything else read the trapframe. Synchronizing here
|
||||
* is impossible if the process is running.
|
||||
*/
|
||||
cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_tf,
|
||||
/* XXX */
|
||||
(void *)&tf, sizeof(tf));
|
||||
if (cc < 0)
|
||||
errx(1, "kvm_read: %s (reading kernel trapframe)",
|
||||
kvm_geterr(kd));
|
||||
if (cc != sizeof(tf))
|
||||
errx(1, "cannot read kernel trapframe");
|
||||
|
||||
/*
|
||||
* Write out the real trap frame.
|
||||
*/
|
||||
off = offsetof(struct user, u_md);
|
||||
off += offsetof(struct md_coredump, md_tf);
|
||||
if (lseek(fd, off, SEEK_SET) == -1)
|
||||
err(1, "lseek");
|
||||
(void)write(fd, &tf, sizeof(tf));
|
||||
|
||||
if (ki->kp_proc.p_md.md_fpstate != 0) {
|
||||
/*
|
||||
* If floating point state is present, write it out too.
|
||||
* It comes right after the trapframe so we don't need to seek.
|
||||
*/
|
||||
struct fpstate fs;
|
||||
cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_fpstate,
|
||||
(void *)&fs, sizeof(fs));
|
||||
if (cc < 0)
|
||||
errx(1, "kvm_read: %s (fpu state)", kvm_geterr(kd));
|
||||
if (cc != sizeof(fs))
|
||||
errx(1, "cannot read fpu state");
|
||||
(void)write(fd, (char *)&fs, sizeof(fs));
|
||||
}
|
||||
/*
|
||||
* Read pcb.
|
||||
*/
|
||||
if (lseek(fd, (off_t)offsetof(struct user, u_pcb), SEEK_SET) == -1)
|
||||
err(1, "lseek");
|
||||
cc = read(fd, (char *)&pcb, sizeof(pcb));
|
||||
if (cc != sizeof(pcb)) {
|
||||
if (cc < 0)
|
||||
err(1, "read");
|
||||
errx(1, "couldn't read pcb from core file");
|
||||
}
|
||||
|
||||
/*
|
||||
* Write any unsaved windows to the appropriate stack locations.
|
||||
*/
|
||||
nsaved = pcb.pcb_nsaved;
|
||||
if (nsaved == 0)
|
||||
return;
|
||||
|
||||
rw = &pcb.pcb_rw[0];
|
||||
off = ctob(UPAGES + ki->kp_eproc.e_vm.vm_dsize);
|
||||
ssize = ctob(ki->kp_eproc.e_vm.vm_ssize);
|
||||
sp = tf.tf_out[6];
|
||||
for (; --nsaved >= 0; ++rw) {
|
||||
/*
|
||||
* Copy register window into appropriate stack location.
|
||||
*/
|
||||
s = ssize - (USRSTACK - sp);
|
||||
if (s < 0) {
|
||||
if (s < -NBPG)
|
||||
errx(1, "cannot copy pcb windows to stack");
|
||||
/*
|
||||
* It's possible to be missing the bottomost
|
||||
* page because a stack page hasn't been allocated
|
||||
* for the register save area. Shift over
|
||||
* the stack segment by a page, and update
|
||||
* the u-area to reflect the new stack size. YECH!
|
||||
*/
|
||||
shift_page(fd, off, ssize);
|
||||
ssize += NBPG;
|
||||
s += NBPG;
|
||||
++ki->kp_eproc.e_vm.vm_ssize;
|
||||
(void)lseek(fd,
|
||||
(off_t)offsetof(struct user, u_kproc.kp_eproc.e_vm),
|
||||
SEEK_SET);
|
||||
(void)write(fd,
|
||||
&ki->kp_eproc.e_vm, sizeof(ki->kp_eproc.e_vm));
|
||||
}
|
||||
if (lseek(fd, off + s, SEEK_SET) == -1)
|
||||
errx(1, "cannot copy pcb windows to stack");
|
||||
|
||||
(void)write(fd, rw, sizeof(*rw));
|
||||
sp = rw->rw_in[6];
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user