| /* Target-dependent code for OSF/1 on Alpha. |
| Copyright 2002, 2003 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "gdbcore.h" |
| #include "value.h" |
| #include "osabi.h" |
| |
| #include "alpha-tdep.h" |
| |
| /* Under OSF/1, the __sigtramp routine is frameless and has a frame |
| size of zero, but we are able to backtrace through it. */ |
| static CORE_ADDR |
| alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc) |
| { |
| char *name; |
| |
| find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL); |
| if (PC_IN_SIGTRAMP (pc, name)) |
| return frame->frame; |
| return 0; |
| } |
| |
| static int |
| alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name) |
| { |
| return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0); |
| } |
| |
| static CORE_ADDR |
| alpha_osf1_sigcontext_addr (struct frame_info *frame) |
| { |
| return (read_memory_integer (frame->next ? frame->next->frame |
| : frame->frame, 8)); |
| } |
| |
| static void |
| alpha_osf1_init_abi (struct gdbarch_info info, |
| struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp); |
| /* The next/step support via procfs on OSF1 is broken when running |
| on multi-processor machines. We need to use software single stepping |
| instead. */ |
| set_gdbarch_software_single_step (gdbarch, alpha_software_single_step); |
| |
| tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame; |
| tdep->sigcontext_addr = alpha_osf1_sigcontext_addr; |
| |
| tdep->jb_pc = 2; |
| tdep->jb_elt_size = 8; |
| } |
| |
| void |
| _initialize_alpha_osf1_tdep (void) |
| { |
| gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1, |
| alpha_osf1_init_abi); |
| } |