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32d0add0a6
gdb/ChangeLog: Update year range in copyright notice of all files.
166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/* Target-dependent code for OpenVMS IA-64.
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Copyright (C) 2012-2015 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-unwind.h"
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#include "ia64-tdep.h"
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#include "osabi.h"
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#include "gdbtypes.h"
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#include "gdbcore.h"
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#ifdef HAVE_LIBUNWIND_IA64_H
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/* Libunwind callback accessor function to acquire procedure unwind-info. */
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static int
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ia64_vms_find_proc_info_x (unw_addr_space_t as, unw_word_t ip,
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unw_proc_info_t *pi,
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int need_unwind_info, void *arg)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
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unw_dyn_info_t di;
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int ret;
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gdb_byte buf[32];
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const char *annex = core_addr_to_string (ip);
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LONGEST res;
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CORE_ADDR table_addr;
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unsigned int info_len;
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res = target_read (¤t_target, TARGET_OBJECT_OPENVMS_UIB,
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annex + 2, buf, 0, sizeof (buf));
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if (res != sizeof (buf))
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return -UNW_ENOINFO;
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pi->format = UNW_INFO_FORMAT_REMOTE_TABLE;
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pi->start_ip = extract_unsigned_integer (buf + 0, 8, byte_order);
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pi->end_ip = extract_unsigned_integer (buf + 8, 8, byte_order);
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pi->gp = extract_unsigned_integer (buf + 24, 8, byte_order);
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table_addr = extract_unsigned_integer (buf + 16, 8, byte_order);
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if (table_addr == 0)
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{
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/* No unwind data. */
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pi->unwind_info = NULL;
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pi->unwind_info_size = 0;
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return 0;
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}
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res = target_read_memory (table_addr, buf, 8);
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if (res != 0)
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return -UNW_ENOINFO;
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/* Check version. */
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if (extract_unsigned_integer (buf + 6, 2, byte_order) != 1)
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return -UNW_EBADVERSION;
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info_len = extract_unsigned_integer (buf + 0, 4, byte_order);
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pi->unwind_info_size = 8 * info_len;
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/* Read info. */
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pi->unwind_info = xmalloc (pi->unwind_info_size);
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res = target_read_memory (table_addr + 8,
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pi->unwind_info, pi->unwind_info_size);
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if (res != 0)
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{
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xfree (pi->unwind_info);
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pi->unwind_info = NULL;
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return -UNW_ENOINFO;
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}
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/* FIXME: Handle OSSD (OS Specific Data). This extension to ia64 unwind
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information by OpenVMS is currently not handled by libunwind, but
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looks to be used only in very specific context, and is not generated by
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GCC. */
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pi->lsda = table_addr + 8 + pi->unwind_info_size;
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if (extract_unsigned_integer (buf + 4, 2, byte_order) & 3)
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{
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pi->lsda += 8;
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/* There might be an handler, but this is not used for unwinding. */
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pi->handler = 0;
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}
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return 0;
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}
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/* Libunwind callback accessor function for cleanup. */
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static void
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ia64_vms_put_unwind_info (unw_addr_space_t as,
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unw_proc_info_t *pip, void *arg)
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{
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/* Nothing required for now. */
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}
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/* Libunwind callback accessor function to get head of the dynamic
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unwind-info registration list. */
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static int
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ia64_vms_get_dyn_info_list (unw_addr_space_t as,
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unw_word_t *dilap, void *arg)
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{
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return -UNW_ENOINFO;
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}
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/* Set of libunwind callback acccessor functions. */
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static unw_accessors_t ia64_vms_unw_accessors;
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static unw_accessors_t ia64_vms_unw_rse_accessors;
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/* Set of ia64-libunwind-tdep gdb callbacks and data for generic
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ia64-libunwind-tdep code to use. */
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static struct libunwind_descr ia64_vms_libunwind_descr;
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#endif /* HAVE_LIBUNWIND_IA64_H */
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static void
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ia64_openvms_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
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#ifdef HAVE_LIBUNWIND_IA64_H
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/* Override the default descriptor. */
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ia64_vms_unw_accessors = ia64_unw_accessors;
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ia64_vms_unw_accessors.find_proc_info = ia64_vms_find_proc_info_x;
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ia64_vms_unw_accessors.put_unwind_info = ia64_vms_put_unwind_info;
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ia64_vms_unw_accessors.get_dyn_info_list_addr = ia64_vms_get_dyn_info_list;
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ia64_vms_unw_rse_accessors = ia64_unw_rse_accessors;
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ia64_vms_unw_rse_accessors.find_proc_info = ia64_vms_find_proc_info_x;
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ia64_vms_unw_rse_accessors.put_unwind_info = ia64_vms_put_unwind_info;
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ia64_vms_unw_rse_accessors.get_dyn_info_list_addr = ia64_vms_get_dyn_info_list;
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ia64_vms_libunwind_descr = ia64_libunwind_descr;
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ia64_vms_libunwind_descr.accessors = &ia64_vms_unw_accessors;
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ia64_vms_libunwind_descr.special_accessors = &ia64_vms_unw_rse_accessors;
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libunwind_frame_set_descr (gdbarch, &ia64_vms_libunwind_descr);
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#endif
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_ia64_vms_tdep;
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void
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_initialize_ia64_vms_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_OPENVMS,
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ia64_openvms_init_abi);
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}
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