00001 /* 00002 * IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. By 00003 * downloading, copying, installing or using the software you agree to 00004 * this license. If you do not agree to this license, do not download, 00005 * install, copy or use the software. 00006 * 00007 * Intel Open Source License 00008 * 00009 * Copyright (c) 2005 Intel Corporation. All rights reserved. 00010 * 00011 * Redistribution and use in source and binary forms, with or without 00012 * modification, are permitted provided that the following conditions are 00013 * met: 00014 * 00015 * Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 00018 * Redistributions in binary form must reproduce the above copyright 00019 * notice, this list of conditions and the following disclaimer in the 00020 * documentation and/or other materials provided with the distribution. 00021 * 00022 * Neither the name of the Intel Corporation nor the names of its 00023 * contributors may be used to endorse or promote products derived from 00024 * this software without specific prior written permission. 00025 * 00026 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00027 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00028 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00029 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR 00030 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00031 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00032 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00033 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00034 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00035 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00036 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00037 */ 00038 00039 #if defined(__i386__) 00040 00041 #include "FatalSignals.h" 00042 00043 #if defined(__linux__) 00044 #include <asm/sigcontext.h> 00045 struct sigframe 00046 { 00047 char *pretcode; 00048 int sig; 00049 struct sigcontext sc; 00050 struct _fpstate fpstate; 00051 }; 00052 #endif 00053 00054 // Generally, this function just follows the frame pointer and looks 00055 // at the return address (i.e. the next one on the stack). 00056 // 00057 // Things get a little funky in the frame for the signal handler 00058 // (identified by the parameter sighandler_frame), where we need to 00059 // look into the place where the kernel stored the faulting address. 00060 size_t 00061 StackTrace::get_trace(void* stack[], size_t size, u_int sighandler_frame) 00062 { 00063 void **fp; 00064 00065 asm volatile("movl %%ebp,%0" : "=r" (fp)); 00066 00067 stack[0] = 0; // fake frame for this this fn, just use 0 00068 size_t frame = 1; 00069 while (frame < size) { 00070 if (*(fp + 1) == 0 || *fp == 0) 00071 break; 00072 00073 if (sighandler_frame != 0 && frame == sighandler_frame) { 00074 #if defined(__linux__) 00075 struct sigframe* sf = (struct sigframe*)(fp+1); 00076 struct sigcontext* scxt = &(sf->sc); 00077 stack[frame] = (void*) scxt->eip; 00078 #else 00079 stack[frame] = *(fp + 1); 00080 #endif 00081 } else { 00082 stack[frame] = *(fp + 1); 00083 } 00084 00085 fp = (void **)(*fp); 00086 ++frame; 00087 } 00088 00089 return frame; 00090 } 00091 00092 #endif /* __i386__ */