Annotation of src/usr.bin/pmdb/core.c, Revision 1.1
1.1 ! fgsch 1: /* $OpenBSD$ */
! 2: /*
! 3: * Copyright (c) 2002 Jean-Francois Brousseau <krapht@secureops.com>
! 4: * All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: *
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. The name of the author may not be used to endorse or promote products
! 13: * derived from this software without specific prior written permission.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
! 17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
! 18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/stat.h>
! 29: #include <sys/mman.h>
! 30:
! 31: #include <err.h>
! 32: #include <stdio.h>
! 33: #include <fcntl.h>
! 34: #include <string.h>
! 35: #include <stdlib.h>
! 36: #include <signal.h>
! 37: #include <unistd.h>
! 38:
! 39: #include "core.h"
! 40: #include "pmdb.h"
! 41:
! 42: int
! 43: read_core(const char *path, struct pstate *ps)
! 44: {
! 45: struct corefile *cf;
! 46: void *core_map;
! 47: off_t c_off;
! 48: int i, cfd;
! 49:
! 50: cf = (struct corefile *)malloc(sizeof(*cf));
! 51: if (cf == NULL)
! 52: err(1, "malloc");
! 53:
! 54: cfd = open(path, O_RDONLY, 0600);
! 55: if (cfd < 0)
! 56: err(1, "open() failed on core file");
! 57:
! 58: if (fstat(cfd, &(cf->cfstat)) < 0)
! 59: err(1, "fstat() failed on core");
! 60:
! 61: if (cf->cfstat.st_mtimespec.tv_sec < ps->exec_stat.st_mtimespec.tv_sec)
! 62: warnx("executable is more recent than core file!");
! 63:
! 64: core_map = mmap(NULL, cf->cfstat.st_size, PROT_READ, MAP_SHARED,
! 65: cfd, 0);
! 66: if (core_map == MAP_FAILED)
! 67: err(1, "mmap() failed on core");
! 68:
! 69: cf->chdr = (struct core *)core_map;
! 70: c_off = cf->chdr->c_hdrsize;
! 71: if (CORE_GETMAGIC(*(cf->chdr)) != COREMAGIC)
! 72: errx(1, "hey, that's not a core file");
! 73:
! 74: printf("Core file generated from '%s' by signal %d (SIG%s)\n",
! 75: cf->chdr->c_name, cf->chdr->c_signo,
! 76: sys_signame[cf->chdr->c_signo]);
! 77:
! 78: #ifdef DEBUG
! 79: printf("Core: text=0x%lx, data=0x%lx, stack=0x%lx\n",
! 80: cf->chdr->c_tsize, cf->chdr->c_dsize, cf->chdr->c_ssize);
! 81: #endif
! 82:
! 83: cf->segs = (struct coreseg **)calloc(cf->chdr->c_nseg,
! 84: sizeof(cf->segs));
! 85: if (cf->segs == NULL)
! 86: err(1, "calloc");
! 87:
! 88: for (i = 0; i < cf->chdr->c_nseg; i++) {
! 89: cf->segs[i] = (struct coreseg *)(core_map + c_off);
! 90: if (CORE_GETMAGIC(*(cf->segs[i])) != CORESEGMAGIC)
! 91: errx(1, "invalid segment hdr for segment %d", i);
! 92:
! 93: if (CORE_GETFLAG(*(cf->segs[i])) & CORE_CPU) {
! 94: cf->regs = (struct reg *)
! 95: ((long) cf->segs[i] + cf->chdr->c_seghdrsize);
! 96: }
! 97:
! 98: if (CORE_GETFLAG(*(cf->segs[i])) & CORE_STACK)
! 99: cf->c_stack = cf->segs[i] + cf->chdr->c_seghdrsize;
! 100:
! 101: c_off += cf->chdr->c_seghdrsize + cf->segs[i]->c_size;
! 102:
! 103: #ifdef DEBUG
! 104: (void)printf("seg[%d]: midmag=0x%lx addr=0x%lx size=0x%lx\n",
! 105: i, cf->segs[i]->c_midmag, cf->segs[i]->c_addr,
! 106: cf->segs[i]->c_size);
! 107: #endif
! 108: }
! 109:
! 110: cf->path = (char *)path;
! 111: ps->ps_flags |= PSF_CORE;
! 112: ps->ps_core = cf;
! 113:
! 114: return (0);
! 115: }
! 116:
! 117: void
! 118: free_core(struct pstate *ps)
! 119: {
! 120: struct corefile *cf = ps->ps_core;
! 121:
! 122: if (cf == NULL)
! 123: return;
! 124:
! 125: if (cf->segs != NULL) {
! 126: free(cf->segs);
! 127: cf->segs = NULL;
! 128: }
! 129: }
! 130:
! 131: void
! 132: core_printregs(struct corefile *cf)
! 133: {
! 134: reg *rg;
! 135: int i;
! 136:
! 137: rg = (reg *)cf->regs;
! 138: for (i = 0; i < md_def.nregs; i++)
! 139: printf("%s:\t0x%.*lx\n", md_def.md_reg_names[i],
! 140: (int)(sizeof(reg) * 2), (long) rg[i]);
! 141: }
![[BACK]](/icons/back.gif){kind=icon}
Return to core.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / pmdb