Add x86 OpenBSD native configuration.

* config/i386/obsd.mt, config/i386/tm-obsd.h, config/i386/obsd.mh,
config/i386/nm-obsd.h: New files.
* configure.host (i[3456]86-*-openbsd*): New host.
* configure.tgt (i[3456]86-*-openbsd*): New target.
* NEWS: Update.

4 files changed, 198 insertions, 0 deletions

diff --git a/gdb/config/i386/nm-obsd.h b/gdb/config/i386/nm-obsd.h
new file mode 100644
index 0000000..6113e14
--- /dev/null
+++ b/gdb/config/i386/nm-obsd.h
@@ -0,0 +1,110 @@
+/* Native-dependent definitions for OpenBSD/i386.
+   Copyright 2001 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.  */
+
+#ifndef NM_OBSD_H
+#define NM_OBSD_H
+
+/* Type of the third argument to the `ptrace' system call.  */
+#define PTRACE_ARG3_TYPE caddr_t
+
+/* Override copies of {fetch,store}_inferior_registers in `infptrace.c'.  */
+#define FETCH_INFERIOR_REGISTERS
+
+/* We can attach and detach.  */
+#define ATTACH_DETACH
+
+
+/* Support for the user struct.  */
+
+/* Return the size of the user struct.  */
+
+#define KERNEL_U_SIZE kernel_u_size ()
+extern int kernel_u_size (void);
+
+/* This is the amount to subtract from u.u_ar0
+   to get the offset in the core file of the register values.  */
+
+#include <machine/vmparam.h>
+#define KERNEL_U_ADDR USRSTACK
+
+#define REGISTER_U_ADDR(addr, blockend, regno) \
+  (addr) = register_u_addr ((blockend), (regno))
+extern CORE_ADDR register_u_addr (CORE_ADDR blockend, int regno);
+
+
+/* Shared library support.  */
+
+#include "solib.h"		/* Support for shared libraries. */
+
+/* Make structure definitions match up with those expected in `solib.c'.  */
+
+#define link_object	sod
+#define lo_name		sod_name
+#define lo_library	sod_library
+#define lo_unused	sod_reserved
+#define lo_major	sod_major
+#define lo_minor	sod_minor
+#define lo_next		sod_next
+
+#define link_map	so_map
+#define lm_addr		som_addr
+#define lm_name		som_path
+#define lm_next		som_next
+#define lm_lop		som_sod
+#define lm_lob		som_sodbase
+#define lm_rwt		som_write
+#define lm_ld		som_dynamic
+#define lm_lpd		som_spd
+
+#define link_dynamic_2	section_dispatch_table
+#define ld_loaded	sdt_loaded
+#define ld_need		sdt_sods
+#define ld_rules	sdt_filler1
+#define ld_got		sdt_got
+#define ld_plt		sdt_plt
+#define ld_rel		sdt_rel
+#define ld_hash		sdt_hash
+#define ld_stab		sdt_nzlist
+#define ld_stab_hash	sdt_filler2
+#define ld_buckets	sdt_buckets
+#define ld_symbols	sdt_strings
+#define ld_symb_size	sdt_str_sz
+#define ld_text		sdt_text_sz
+#define ld_plt_sz	sdt_plt_sz
+
+#define rtc_symb	rt_symbol
+#define rtc_sp		rt_sp
+#define rtc_next	rt_next
+
+#define ld_debug	so_debug
+#define ldd_version	dd_version
+#define ldd_in_debugger	dd_in_debugger
+#define ldd_sym_loaded	dd_sym_loaded
+#define ldd_bp_addr	dd_bpt_addr
+#define ldd_bp_inst	dd_bpt_shadow
+#define ldd_cp		dd_cc
+
+#define link_dynamic	_dynamic
+#define ld_version	d_version
+#define ldd		d_debug
+#define ld_un		d_un
+#define ld_2		d_sdt
+
+#endif /* nm-obsd.h */
diff --git a/gdb/config/i386/obsd.mh b/gdb/config/i386/obsd.mh
new file mode 100644
index 0000000..e3f5f45
--- /dev/null
+++ b/gdb/config/i386/obsd.mh
@@ -0,0 +1,8 @@
+# Host: Intel 386 running OpenBSD
+
+XM_FILE= xm-i386.h
+XDEPFILES=
+
+NAT_FILE= nm-obsd.h
+# NOTE: Do not spread NATDEPFILES over several lines - it hurts BSD make.
+NATDEPFILES= fork-child.o infptrace.o inftarg.o solib.o solib-sunos.o corelow.o core-aout.o i386-nat.o i387-nat.o i386bsd-nat.o
diff --git a/gdb/config/i386/obsd.mt b/gdb/config/i386/obsd.mt
new file mode 100644
index 0000000..5c96426
--- /dev/null
+++ b/gdb/config/i386/obsd.mt
@@ -0,0 +1,3 @@
+# Target: Intel 386 running OpenBSD
+TDEPFILES= i386-tdep.o i387-tdep.o i386bsd-tdep.o
+TM_FILE= tm-obsd.h
diff --git a/gdb/config/i386/tm-obsd.h b/gdb/config/i386/tm-obsd.h
new file mode 100644
index 0000000..d26b03b
--- /dev/null
+++ b/gdb/config/i386/tm-obsd.h
@@ -0,0 +1,77 @@
+/* Target-dependent definitions for OpenBSD/i386.
+   Copyright 2001 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.  */
+
+#ifndef TM_OBSD_H
+#define TM_OBSD_H
+
+#define HAVE_I387_REGS
+#include "i386/tm-i386.h"
+
+/* OpenBSD uses the old gcc convention for struct returns.  */
+
+#define USE_STRUCT_CONVENTION(gcc_p, type) \
+  generic_use_struct_convention (1, type)
+
+
+/* Support for longjmp.  */
+
+/* Details about jmp_buf.  It's supposed to be an array of integers.  */
+
+#define JB_ELEMENT_SIZE 4	/* Size of elements in jmp_buf.  */
+#define JB_PC		0	/* Array index of saved PC.  */
+
+/* Figure out where the longjmp will land.  Store the address that
+   longjmp will jump to in *ADDR, and return non-zero if successful.  */
+
+#define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
+extern int get_longjmp_target (CORE_ADDR *addr);
+
+
+/* Support for signal handlers.  */
+
+#define IN_SIGTRAMP(pc, name) i386bsd_in_sigtramp (pc, name)
+extern int i386bsd_in_sigtramp (CORE_ADDR pc, char *name);
+
+/* These defines allow the recognition of sigtramps as a function name
+   <sigtramp>.
+
+   FIXME: kettenis/2001-07-13: These should be added to the target
+   vector and turned into functions when we go "multi-arch".  */
+
+#define SIGTRAMP_START(pc) i386bsd_sigtramp_start
+#define SIGTRAMP_END(pc) i386bsd_sigtramp_end
+extern CORE_ADDR i386bsd_sigtramp_start;
+extern CORE_ADDR i386bsd_sigtramp_end;
+
+/* Override FRAME_SAVED_PC to enable the recognition of signal handlers.  */
+
+#undef FRAME_SAVED_PC
+#define FRAME_SAVED_PC(frame) i386bsd_frame_saved_pc (frame)
+extern CORE_ADDR i386bsd_frame_saved_pc (struct frame_info *frame);
+
+
+/* Shared library support.  */
+
+/* Return non-zero if we are in a shared library trampoline code stub.  */
+
+#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) \
+  (name && !strcmp(name, "_DYNAMIC"))
+
+#endif /* tm-obsd.h */