usr/src/cmd/sgs/librtld_db/demo/common/callstack.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/types.h>
  30 #include <sys/reg.h>
  31 #include <sys/frame.h>
  32 #include <sys/stack.h>
  33 #include <sys/machelf.h>
  34 #include <procfs.h>
  35
  36 #include "rdb.h"
  37
  38 #ifndef STACK_BIAS
  39 #define STACK_BIAS      0
  40 #endif
  41
  42 static int
  43 get_frame(struct ps_prochandle *ph, psaddr_t fp, struct frame *frm)
  44 {
  45 #if     defined(_LP64)
  46         /*
  47          * Use special structures to read a 32-bit process
  48          * from a 64-bit process.
  49          */
  50         if (ph->pp_dmodel == PR_MODEL_ILP32) {
  51                 struct frame32  frm32;
  52
  53                 if (ps_pread(ph, (psaddr_t)fp, (char *)&frm32,
  54                     sizeof (struct frame32)) != PS_OK) {
  55                         (void) printf("stack trace: bad frame pointer: 0x%lx\n",
  56                                 fp);
  57                         return (-1);
  58                 }
  59
  60                 frm->fr_savpc = (long)frm32.fr_savpc;
  61 #if     defined(__sparcv9)
  62                 frm->fr_savfp = (struct frame *)(uintptr_t)frm32.fr_savfp;
  63 #elif   defined(__amd64)
  64                 frm->fr_savfp = (long)frm32.fr_savfp;
  65 #endif
  66                 return (0);
  67         }
  68 #endif  /* defined(_LP64) */
  69
  70         if (ps_pread(ph, (psaddr_t)fp + STACK_BIAS, (char *)frm,
  71             sizeof (struct frame)) != PS_OK) {
  72                 (void) printf("stack trace: bad frame pointer: 0x%lx\n", fp);
  73                 return (-1);
  74         }
  75         return (0);
  76 }
  77
  78 /*
  79  * Relatively architecture neutral routine to display the callstack.
  80  */
  81 void
  82 CallStack(struct ps_prochandle *ph)
  83 {
  84         pstatus_t       pstatus;
  85         greg_t          fp;
  86         struct frame    frm;
  87         char            *symstr;
  88
  89         if (pread(ph->pp_statusfd, &pstatus, sizeof (pstatus), 0) == -1)
  90                 perr("cs: reading status");
  91
  92         symstr = print_address_ps(ph, (ulong_t)pstatus.pr_lwp.pr_reg[R_PC],
  93             FLG_PAP_SONAME);
  94         (void) printf(" 0x%08x:%-17s\n", EC_WORD(pstatus.pr_lwp.pr_reg[R_PC]),
  95             symstr);
  96
  97         fp = pstatus.pr_lwp.pr_reg[R_FP];
  98
  99         while (fp) {
 100                 if (get_frame(ph, (psaddr_t)fp, &frm) == -1)
 101                         return;
 102                 if (frm.fr_savpc) {
 103                         symstr = print_address_ps(ph, (ulong_t)frm.fr_savpc,
 104                             FLG_PAP_SONAME);
 105                         (void) printf(" 0x%08x:%-17s\n", EC_WORD(frm.fr_savpc),
 106                             symstr);
 107                 }
 108                 fp = (greg_t)frm.fr_savfp;
 109         }
 110 }