Add OpenBSD/powerpc support.

* NEWS (New native configurations): Mention OpenBSD/powerpc.
* ppc-tdep.h (struct ppc_reg_offsets): New structure.
(ppc_supply_gregset, ppc_supply_fpregset, ppc_collect_gregset)
(ppc_collect_fpregset): New prototypes.
* ppcobsd-nat.c: New file.
* ppcobsd-tdep.c: New file.
* ppcobsd-tdep.h: New file.
* rs6000-tdep.c: Include "regset.h".
(ppc_supply_reg, ppc_collect_reg, ppc_supply_gregset)
(ppc_supply_fpregset, ppc_collect_gregset, ppc_collect_fpregset):
New functions.
* Makefile.in (ALLDEPFILES): Add pccobsd-nat.c and ppcobsd-tdep.c.
(ppcobsd-nat.o, ppcobsd-tdep.o): New dependencies.
(rs6000-tdep.o): Update dependencies.
* configure.host: Add powerpc-*-openbsd.
* configure.tgt: Add powerpc-*-openbsd.
* config/powerpc/obsd.mh: New file.
* config/powerpc/nm-obsd.h: New file.
* config/powerpc/obsd.mt: New file.

1 files changed, 153 insertions, 0 deletions

diff --git a/gdb/ppcobsd-tdep.c b/gdb/ppcobsd-tdep.c
new file mode 100644
index 00000000000..90381e4c412
--- /dev/null
+++ b/gdb/ppcobsd-tdep.c
@@ -0,0 +1,153 @@
+/* Target-dependent code for OpenBSD/powerpc.
+
+   Copyright 2004 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 "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+
+#include "gdb_string.h"
+
+#include "ppc-tdep.h"
+#include "ppcobsd-tdep.h"
+#include "solib-svr4.h"
+
+/* Register offsets from <machine/reg.h>.  */
+struct ppc_reg_offsets ppcobsd_reg_offsets;
+
+
+/* Core file support.  */
+
+/* Supply register REGNUM in the general-purpose register set REGSET
+   from the buffer specified by GREGS and LEN to register cache
+   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
+
+void
+ppcobsd_supply_gregset (const struct regset *regset,
+			struct regcache *regcache, int regnum,
+			const void *gregs, size_t len)
+{
+  ppc_supply_gregset (regset, regcache, regnum, gregs, len);
+  ppc_supply_fpregset (regset, regcache, regnum, gregs, len);
+}
+
+/* Collect register REGNUM in the general-purpose register set
+   REGSET. from register cache REGCACHE into the buffer specified by
+   GREGS and LEN.  If REGNUM is -1, do this for all registers in
+   REGSET.  */
+
+void
+ppcobsd_collect_gregset (const struct regset *regset,
+			 const struct regcache *regcache, int regnum,
+			 void *gregs, size_t len)
+{
+  ppc_collect_gregset (regset, regcache, regnum, gregs, len);
+  ppc_collect_fpregset (regset, regcache, regnum, gregs, len);
+}
+
+/* OpenBS/powerpc register set.  */
+
+struct regset ppcobsd_gregset =
+{
+  &ppcobsd_reg_offsets,
+  ppcobsd_supply_gregset
+};
+
+/* Return the appropriate register set for the core section identified
+   by SECT_NAME and SECT_SIZE.  */
+
+static const struct regset *
+ppcobsd_regset_from_core_section (struct gdbarch *gdbarch,
+				  const char *sect_name, size_t sect_size)
+{
+  if (strcmp (sect_name, ".reg") == 0 && sect_size >= 412)
+    return &ppcobsd_gregset;
+
+  return NULL;
+}
+
+
+static void
+ppcobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  /* OpenBSD uses SVR4-style shared libraries.  */
+  set_gdbarch_in_solib_call_trampoline
+    (gdbarch, generic_in_solib_call_trampoline);
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+  set_gdbarch_regset_from_core_section
+    (gdbarch, ppcobsd_regset_from_core_section);
+}
+
+
+/* OpenBSD uses uses the traditional NetBSD core file format, even for
+   ports that use ELF.  */
+#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
+
+static enum gdb_osabi
+ppcobsd_core_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+    return GDB_OSABI_NETBSD_CORE;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_ppcobsd_tdep (void);
+
+void
+_initialize_ppcobsd_tdep (void)
+{
+  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
+  gdbarch_register_osabi_sniffer (bfd_arch_powerpc, bfd_target_unknown_flavour,
+                                  ppcobsd_core_osabi_sniffer);
+
+  gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_OPENBSD_ELF,
+			  ppcobsd_init_abi);
+
+  /* Avoid initializing the register offsets again if they were
+     already initailized by ppcobsd-nat.c.  */
+  if (ppcobsd_reg_offsets.pc_offset == 0)
+    {
+      /* General-purpose registers.  */
+      ppcobsd_reg_offsets.r0_offset = 0;
+      ppcobsd_reg_offsets.pc_offset = 384;
+      ppcobsd_reg_offsets.ps_offset = 388;
+      ppcobsd_reg_offsets.cr_offset = 392;
+      ppcobsd_reg_offsets.lr_offset = 396;
+      ppcobsd_reg_offsets.ctr_offset = 400;
+      ppcobsd_reg_offsets.xer_offset = 404;
+      ppcobsd_reg_offsets.mq_offset = 408;
+
+      /* Floating-point registers.  */
+      ppcobsd_reg_offsets.f0_offset = 128;
+      ppcobsd_reg_offsets.fpscr_offset = -1;
+
+      /* AltiVec registers.  */
+      ppcobsd_reg_offsets.vr0_offset = 0;
+      ppcobsd_reg_offsets.vscr_offset = 512;
+      ppcobsd_reg_offsets.vrsave_offset = 520;
+    }
+}