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102 lines
2.7 KiB
102 lines
2.7 KiB
/* libunwind - a platform-independent unwind library |
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Copyright (C) 2001-2004 Hewlett-Packard Co |
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
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Permission is hereby granted, free of charge, to any person obtaining |
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a copy of this software and associated documentation files (the |
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"Software"), to deal in the Software without restriction, including |
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without limitation the rights to use, copy, modify, merge, publish, |
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distribute, sublicense, and/or sell copies of the Software, and to |
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permit persons to whom the Software is furnished to do so, subject to |
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the following conditions: |
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The above copyright notice and this permission notice shall be |
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included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ |
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/* This test uses the unwind interface to modify the IP in an ancestor |
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frame while still returning to the parent frame. */ |
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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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#include <libunwind-ia64.h> |
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#define panic(args...) \ |
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{ fprintf (stderr, args); exit (-1); } |
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int verbose; |
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static void |
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sighandler (int signal) |
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{ |
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unw_cursor_t cursor, cursor2; |
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unw_word_t ip; |
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unw_context_t uc; |
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if (verbose) |
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printf ("caught signal %d\n", signal); |
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unw_getcontext (&uc); |
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if (unw_init_local (&cursor, &uc) < 0) |
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panic ("unw_init() failed!\n"); |
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/* get cursor for caller of sighandler: */ |
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if (unw_step (&cursor) < 0) |
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panic ("unw_step() failed!\n"); |
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cursor2 = cursor; |
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while (!unw_is_signal_frame (&cursor2)) |
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if (unw_step (&cursor2) < 0) |
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panic ("failed to find signal frame!\n"); |
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if (unw_step (&cursor2) < 0) |
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panic ("unw_step() failed!\n"); |
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if (unw_get_reg (&cursor2, UNW_REG_IP, &ip) < 0) |
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panic ("failed to get IP!\n"); |
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/* skip faulting instruction (doesn't handle MLX template) */ |
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++ip; |
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if ((ip & 0x3) == 0x3) |
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ip += 13; |
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if (unw_set_reg (&cursor2, UNW_REG_IP, ip) < 0) |
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panic ("failed to set IP!\n"); |
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unw_resume (&cursor); /* update context & return to caller of sighandler() */ |
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panic ("unexpected return from unw_resume()!\n"); |
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} |
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static void |
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doit (volatile char *p) |
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{ |
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int ch; |
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ch = *p; /* trigger SIGSEGV */ |
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if (verbose) |
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printf ("doit: finishing execution!\n"); |
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} |
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int |
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main (int argc, char **argv) |
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{ |
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if (argc > 1) |
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verbose = 1; |
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signal (SIGSEGV, sighandler); |
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doit (0); |
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if (verbose) |
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printf ("SUCCESS\n"); |
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return 0; |
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}
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