libbacktrace/xcoff.c

   1 /* xcoff.c -- Get debug data from a XCOFFF file for backtraces.
   2    Copyright (C) 2017 Free Software Foundation, Inc.
   3
   4 Redistribution and use in source and binary forms, with or without
   5 modification, are permitted provided that the following conditions are
   6 met:
   7
   8     (1) Redistributions of source code must retain the above copyright
   9     notice, this list of conditions and the following disclaimer.
  10
  11     (2) Redistributions in binary form must reproduce the above copyright
  12     notice, this list of conditions and the following disclaimer in
  13     the documentation and/or other materials provided with the
  14     distribution.
  15
  16     (3) The name of the author may not be used to
  17     endorse or promote products derived from this software without
  18     specific prior written permission.
  19
  20 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30 POSSIBILITY OF SUCH DAMAGE.  */
  31
  32 #include "config.h"
  33
  34 #include <sys/types.h>
  35
  36 #include "backtrace.h"
  37 #include "internal.h"
  38
  39 /* A trivial routine that always fails to find fileline data.  */
  40
  41 static int
  42 xcoff_fileline (struct backtrace_state *state ATTRIBUTE_UNUSED,
  43                 uintptr_t pc, backtrace_full_callback callback,
  44                 backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
  45                 void *data)
  46
  47 {
  48   static char buf[32];
  49
  50   snprintf (buf, sizeof(buf), "pc=0x%llx", (unsigned long long) pc);
  51   return callback (data, pc, "unknown_file", 123, buf);
  52 }
  53
  54 static void
  55 xcoff_syminfo (struct backtrace_state *state ATTRIBUTE_UNUSED, uintptr_t addr,
  56                backtrace_syminfo_callback callback,
  57                backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
  58                void *data)
  59 {
  60   callback (data, addr, "unknown", 0, 0);
  61 }
  62
  63 /* Initialize the backtrace data when we don't know how to read the
  64    debug info.  */
  65
  66 int
  67 backtrace_initialize (struct backtrace_state *state ATTRIBUTE_UNUSED,
  68                       int descriptor ATTRIBUTE_UNUSED,
  69                       backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
  70                       void *data ATTRIBUTE_UNUSED, fileline *fileline_fn)
  71 {
  72   state->syminfo_fn = xcoff_syminfo;
  73   state->fileline_data = NULL;
  74   *fileline_fn = xcoff_fileline;
  75   return 1;
  76 }