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jeremybenn |
/* Target-dependent code for OSF/1 on Alpha.
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Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "frame.h"
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#include "gdbcore.h"
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#include "value.h"
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#include "osabi.h"
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#include "gdb_string.h"
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#include "objfiles.h"
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#include "alpha-tdep.h"
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static int
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alpha_osf1_pc_in_sigtramp (struct gdbarch *gdbarch,
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CORE_ADDR pc, char *func_name)
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{
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return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
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}
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static CORE_ADDR
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alpha_osf1_sigcontext_addr (struct frame_info *this_frame)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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struct frame_info *next_frame = get_next_frame (this_frame);
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struct frame_id next_id = null_frame_id;
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if (next_frame != NULL)
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next_id = get_frame_id (next_frame);
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return (read_memory_integer (next_id.stack_addr, 8, byte_order));
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}
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static void
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alpha_osf1_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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/* Hook into the MDEBUG frame unwinder. */
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alpha_mdebug_init_abi (info, gdbarch);
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/* The next/step support via procfs on OSF1 is broken when running
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on multi-processor machines. We need to use software single stepping
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instead. */
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set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
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tdep->sigcontext_addr = alpha_osf1_sigcontext_addr;
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tdep->pc_in_sigtramp = alpha_osf1_pc_in_sigtramp;
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tdep->jb_pc = 2;
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tdep->jb_elt_size = 8;
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_alpha_osf1_tdep;
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void
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_initialize_alpha_osf1_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1,
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alpha_osf1_init_abi);
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}
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