--- /dev/null
+/* Target-dependent code for OpenVMS IA-64.
+
+ Copyright (C) 2012 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 3 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, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "frame-unwind.h"
+#include "ia64-tdep.h"
+#include "osabi.h"
+#include "gdbtypes.h"
+#include "gdbcore.h"
+
+#ifdef HAVE_LIBUNWIND_IA64_H
+
+/* Libunwind callback accessor function to acquire procedure unwind-info. */
+
+static int
+ia64_vms_find_proc_info_x (unw_addr_space_t as, unw_word_t ip,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ unw_dyn_info_t di;
+ int ret;
+ gdb_byte buf[32];
+ const char *annex = core_addr_to_string (ip);
+ LONGEST res;
+ CORE_ADDR table_addr;
+ unsigned int info_len;
+
+ res = target_read (¤t_target, TARGET_OBJECT_OPENVMS_UIB,
+ annex + 2, buf, 0, sizeof (buf));
+
+ if (res != sizeof (buf))
+ return -UNW_ENOINFO;
+
+ pi->format = UNW_INFO_FORMAT_REMOTE_TABLE;
+ pi->start_ip = extract_unsigned_integer (buf + 0, 8, byte_order);
+ pi->end_ip = extract_unsigned_integer (buf + 8, 8, byte_order);
+ pi->gp = extract_unsigned_integer (buf + 24, 8, byte_order);
+ table_addr = extract_unsigned_integer (buf + 16, 8, byte_order);
+
+ if (table_addr == 0)
+ {
+ /* No unwind data. */
+ pi->unwind_info = NULL;
+ pi->unwind_info_size = 0;
+ return 0;
+ }
+
+ res = target_read_memory (table_addr, buf, 8);
+ if (res != 0)
+ return -UNW_ENOINFO;
+
+ /* Check version. */
+ if (extract_unsigned_integer (buf + 6, 2, byte_order) != 1)
+ return -UNW_EBADVERSION;
+ info_len = extract_unsigned_integer (buf + 0, 4, byte_order);
+ pi->unwind_info_size = 8 * info_len;
+
+ /* Read info. */
+ pi->unwind_info = xmalloc (pi->unwind_info_size);
+
+ res = target_read_memory (table_addr + 8,
+ pi->unwind_info, pi->unwind_info_size);
+ if (res != 0)
+ {
+ xfree (pi->unwind_info);
+ pi->unwind_info = NULL;
+ return -UNW_ENOINFO;
+ }
+
+ /* FIXME: Handle OSSD (OS Specific Data). This extension to ia64 unwind
+ information by OpenVMS is currently not handled by libunwind, but
+ looks to be used only in very specific context, and is not generated by
+ GCC. */
+
+ pi->lsda = table_addr + 8 + pi->unwind_info_size;
+ if (extract_unsigned_integer (buf + 4, 2, byte_order) & 3)
+ {
+ pi->lsda += 8;
+ /* There might be an handler, but this is not used for unwinding. */
+ pi->handler = 0;
+ }
+
+ return 0;
+}
+
+/* Libunwind callback accessor function for cleanup. */
+
+static void
+ia64_vms_put_unwind_info (unw_addr_space_t as,
+ unw_proc_info_t *pip, void *arg)
+{
+ /* Nothing required for now. */
+}
+
+/* Libunwind callback accessor function to get head of the dynamic
+ unwind-info registration list. */
+
+static int
+ia64_vms_get_dyn_info_list (unw_addr_space_t as,
+ unw_word_t *dilap, void *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+/* Set of libunwind callback acccessor functions. */
+static unw_accessors_t ia64_vms_unw_accessors;
+static unw_accessors_t ia64_vms_unw_rse_accessors;
+
+/* Set of ia64 gdb libunwind-frame callbacks and data for generic
+ libunwind-frame code to use. */
+static struct libunwind_descr ia64_vms_libunwind_descr;
+
+#endif /* HAVE_LIBUNWIND_IA64_H */
+
+static void
+ia64_openvms_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
+
+#ifdef HAVE_LIBUNWIND_IA64_H
+ /* Override the default descriptor. */
+ ia64_vms_unw_accessors = ia64_unw_accessors;
+ ia64_vms_unw_accessors.find_proc_info = ia64_vms_find_proc_info_x;
+ ia64_vms_unw_accessors.put_unwind_info = ia64_vms_put_unwind_info;
+ ia64_vms_unw_accessors.get_dyn_info_list_addr = ia64_vms_get_dyn_info_list;
+
+ ia64_vms_unw_rse_accessors = ia64_unw_rse_accessors;
+ ia64_vms_unw_rse_accessors.find_proc_info = ia64_vms_find_proc_info_x;
+ ia64_vms_unw_rse_accessors.put_unwind_info = ia64_vms_put_unwind_info;
+ ia64_vms_unw_rse_accessors.get_dyn_info_list_addr = ia64_vms_get_dyn_info_list;
+
+ ia64_vms_libunwind_descr = ia64_libunwind_descr;
+ ia64_vms_libunwind_descr.accessors = &ia64_vms_unw_accessors;
+ ia64_vms_libunwind_descr.special_accessors = &ia64_vms_unw_rse_accessors;
+
+ libunwind_frame_set_descr (gdbarch, &ia64_vms_libunwind_descr);
+#endif
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_ia64_hpux_tdep;
+
+void
+_initialize_ia64_hpux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_OPENVMS,
+ ia64_openvms_init_abi);
+}
projects / binutils-gdb.git / commitdiff