| 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 "gdbcore.h" |
| 24 | #include "value.h" |
| 25 | |
| 26 | #include "alpha-tdep.h" |
| 27 | |
| 28 | /* Under OSF/1, the __sigtramp routine is frameless and has a frame |
| 29 | size of zero, but we are able to backtrace through it. */ |
| 30 | static CORE_ADDR |
| 31 | alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc) |
| 32 | { |
| 33 | char *name; |
| 34 | |
| 35 | find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL); |
| 36 | if (PC_IN_SIGTRAMP (pc, name)) |
| 37 | return frame->frame; |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static int |
| 42 | alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name) |
| 43 | { |
| 44 | return (func_name != NULL && STREQ ("__sigtramp", func_name)); |
| 45 | } |
| 46 | |
| 47 | static CORE_ADDR |
| 48 | alpha_osf1_sigcontext_addr (struct frame_info *frame) |
| 49 | { |
| 50 | return (read_memory_integer (frame->next ? frame->next->frame |
| 51 | : frame->frame, 8)); |
| 52 | } |
| 53 | |
| 54 | static void |
| 55 | alpha_osf1_init_abi (struct gdbarch_info info, |
| 56 | struct gdbarch *gdbarch) |
| 57 | { |
| 58 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 59 | |
| 60 | set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp); |
| 61 | |
| 62 | tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame; |
| 63 | tdep->sigcontext_addr = alpha_osf1_sigcontext_addr; |
| 64 | |
| 65 | tdep->jb_pc = 2; |
| 66 | tdep->jb_elt_size = 8; |
| 67 | } |
| 68 | |
| 69 | void |
| 70 | _initialize_alpha_osf1_tdep (void) |
| 71 | { |
| 72 | alpha_gdbarch_register_os_abi (ALPHA_ABI_OSF1, alpha_osf1_init_abi); |
| 73 | } |