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authorMark Kettenis <kettenis@gnu.org>2002-10-20 11:54:40 +0000
committerMark Kettenis <kettenis@gnu.org>2002-10-20 11:54:40 +0000
commit005328e3424c897b43ff0f6666bcf6f10efcb5d7 (patch)
tree12aed2097145e2a945bde79413fd297756b123c0 /gdb/i386obsd-tdep.c
parent05e17ccd8e74de75c41860c56eb0557c37b67c35 (diff)
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* configure.tgt (i[3456]86-*-openbsd*): Set gdb_target to obds.
* config/i386/obsd.mt: New file. * i386bsd-nat.c (_initialize_i386bsd_nat): Introduce i386obsd_sc_pc_offset and i386obsd_sc_sp_offset; * i386obsd-nat.c (_initialize_i386obsd_nat): Set i386obsd_sigtramp_start and i386obsd_sigtramp_end instead of i386nbsd_sigtramp_start and i386nbsd_sigtramp_end. * i386obsd-tdep.c: New file.
Diffstat (limited to 'gdb/i386obsd-tdep.c')
-rw-r--r--gdb/i386obsd-tdep.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/gdb/i386obsd-tdep.c b/gdb/i386obsd-tdep.c
new file mode 100644
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--- /dev/null
+++ b/gdb/i386obsd-tdep.c
@@ -0,0 +1,122 @@
+/* Target-dependent code for OpenBSD/i386.
+ Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "gdbcore.h"
+#include "regcache.h"
+
+#include "i386-tdep.h"
+#include "i387-tdep.h"
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_i386obsd_tdep (void);
+
+#define SIZEOF_STRUCT_REG (16 * 4)
+
+static void
+i386obsd_supply_reg (char *regs, int regno)
+{
+ int i;
+
+ for (i = 0; i <= 15; i++)
+ if (regno == i || regno == -1)
+ supply_register (i, regs + i * 4);
+}
+
+static void
+fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
+ CORE_ADDR ignore)
+{
+ char *regs, *fsave;
+
+ /* We get everything from one section. */
+ if (which != 0)
+ return;
+
+ if (core_reg_size < (SIZEOF_STRUCT_REG + 108))
+ {
+ warning ("Wrong size register set in core file.");
+ return;
+ }
+
+ regs = core_reg_sect;
+ fsave = core_reg_sect + SIZEOF_STRUCT_REG;
+
+ /* Integer registers. */
+ i386obsd_supply_reg (regs, -1);
+
+ /* Floating point registers. */
+ i387_supply_fsave (fsave);
+}
+
+static struct core_fns i386obsd_core_fns =
+{
+ bfd_target_unknown_flavour, /* core_flavour */
+ default_check_format, /* check_format */
+ default_core_sniffer, /* core_sniffer */
+ fetch_core_registers, /* core_read_registers */
+ NULL /* next */
+};
+
+
+CORE_ADDR i386obsd_sigtramp_start = 0xbfbfdf20;
+CORE_ADDR i386obsd_sigtramp_end = 0xbfbfdff0;
+
+/* From <machine/signal.h>. */
+int i386obsd_sc_pc_offset = 44;
+int i386obsd_sc_sp_offset = 56;
+
+static void
+i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Obviously OpenBSD is BSD-based. */
+ i386bsd_init_abi (info, gdbarch);
+
+ /* OpenBSD uses -freg-struct-return by default. */
+ tdep->struct_return = reg_struct_return;
+
+ /* OpenBSD uses a different memory layout. */
+ tdep->sigtramp_start = i386obsd_sigtramp_start;
+ tdep->sigtramp_end = i386obsd_sigtramp_end;
+
+ /* OpenBSD has a `struct sigcontext' that's different from the
+ origional 4.3 BSD. */
+ tdep->sc_pc_offset = i386obsd_sc_pc_offset;
+ tdep->sc_sp_offset = i386obsd_sc_sp_offset;
+}
+
+void
+_initialize_i386obsd_tdep (void)
+{
+ add_core_fns (&i386obsd_core_fns);
+
+ /* FIXME: kettenis/20021020: Since OpenBSD/i386 binaries are
+ indistingushable from NetBSD/i386 a.out binaries, building a GDB
+ that should support both these targets will probably not work as
+ expected. */
+#define GDB_OSABI_OPENBSD_AOUT GDB_OSABI_NETBSD_AOUT
+
+ gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_OPENBSD_AOUT,
+ i386obsd_init_abi);
+}