gdb/alpha-osf1-tdep.c

   1 /* Target-dependent code for OSF/1 on Alpha.
   2    Copyright 2002 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "value.h"
  24
  25 #include "alpha-tdep.h"
  26
  27 /* Under OSF/1, the __sigtramp routine is frameless and has a frame
  28    size of zero, but we are able to backtrace through it.  */
  29 static CORE_ADDR
  30 alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
  31 {
  32   char *name;
  33
  34   find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
  35   if (PC_IN_SIGTRAMP (pc, name))
  36     return frame->frame;
  37   return 0;
  38 }
  39
  40 static int
  41 alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
  42 {
  43   return (func_name != NULL && STREQ ("__sigtramp", func_name));
  44 }
  45
  46 static void
  47 alpha_osf1_init_abi (struct gdbarch_info info,
  48                      struct gdbarch *gdbarch)
  49 {
  50   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  51
  52   set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp);
  53
  54   tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
  55
  56   tdep->jb_pc = 2;
  57   tdep->jb_elt_size = 8;
  58 }
  59
  60 void
  61 _initialize_alpha_osf1_tdep (void)
  62 {
  63   alpha_gdbarch_register_os_abi (ALPHA_ABI_OSF1, alpha_osf1_init_abi);
  64 }