1 /* Target-dependent code for OSF/1 on Alpha. 2 Copyright 2002, 2003 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 #include "osabi.h" 26 #include "gdb_string.h" 27 #include "objfiles.h" 28 29 #include "alpha-tdep.h" 30 31 static int 32 alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name) 33 { 34 return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0); 35 } 36 37 static CORE_ADDR 38 alpha_osf1_sigcontext_addr (struct frame_info *frame) 39 { 40 struct frame_info *next_frame = get_next_frame (frame); 41 42 if (next_frame != NULL) 43 return (read_memory_integer (get_frame_base (next_frame), 8)); 44 else 45 return (read_memory_integer (get_frame_base (frame), 8)); 46 } 47 48 static void 49 alpha_osf1_init_abi (struct gdbarch_info info, 50 struct gdbarch *gdbarch) 51 { 52 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 53 54 /* Hook into the MDEBUG frame unwinder. */ 55 alpha_mdebug_init_abi (info, gdbarch); 56 57 /* The next/step support via procfs on OSF1 is broken when running 58 on multi-processor machines. We need to use software single stepping 59 instead. */ 60 set_gdbarch_software_single_step (gdbarch, alpha_software_single_step); 61 62 tdep->sigcontext_addr = alpha_osf1_sigcontext_addr; 63 tdep->pc_in_sigtramp = alpha_osf1_pc_in_sigtramp; 64 65 tdep->jb_pc = 2; 66 tdep->jb_elt_size = 8; 67 } 68 69 void 70 _initialize_alpha_osf1_tdep (void) 71 { 72 gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1, 73 alpha_osf1_init_abi); 74 } 75