Normalize names of the NetBSD files

The files used to be named 'nbsd', which incorrectly reflects
the name of the OS and confuses it with other BSD derived OSes.

gdb/ChangeLog:

        * Makefile.in (ALL_64_TARGET_OBS, ALL_TARGET_OBS)
        HFILES_NO_SRCDIR, ALLDEPFILES): Rename files.
        * alpha-bsd-nat.c: Adjust include.
        * alpha-bsd-tdep.h: Adjust comment.
        * alpha-nbsd-tdep.c: Rename to ...
        * alpha-netbsd-tdep.c: ... this, adjust include.
        * amd64-nbsd-nat.c: Rename to ...
        * amd64-netbsd-nat.c: ... this, adjust include.
        * amd64-nbsd-tdep.c: Rename to ...
        * amd64-netbsd-tdep.c: ... this, adjust include.
        * amd64-tdep.h: Adjust include.
        * arm-nbsd-nat.c: Rename to ...
        * arm-netbsd-nat.c: ... this, adjust include.
        * arm-nbsd-tdep.c: Rename to ...
        * arm-netbsd-tdep.c: ... this, adjust include.
        * arm-nbsd-tdep.h: Rename to ...
        * arm-netbsd-tdep.h: ... this, adjust include.
        * configure.nat: Adjust file lists.
        * configure.tgt: Likewise.
        * hppa-nbsd-nat.c: Rename to ...
        * hppa-netbsd-nat.c: ... this, adjust include.
        * hppa-nbsd-tdep.c: Rename to ...
        * hppa-netbsd-tdep.c: ... this, adjust include.
        * i386-nbsd-nat.c: Rename to ...
        * i386-netbsd-nat.c: ... this, adjust include.
        * i386-nbsd-tdep.c: Rename to ...
        * i386-netbsd-tdep.c: ... this, adjust include.
        * m68k-bsd-nat.c: Adjust include.
        * mips-nbsd-nat.c: Rename to ...
        * mips-netbsd-nat.c: ... this, adjust include.
        * mips-nbsd-tdep.c: Rename to ...
        * mips-netbsd-tdep.c: ... this, adjust include.
        * mips-nbsd-tdep.h: Rename to ...
        * mips-netbsd-tdep.h: ... this.
        * nbsd-nat.c: Rename to ...
        * netbsd-nat.c: ... this, adjust include.
        * nbsd-nat.h: Rename to ...
        * netbsd-nat.h: ... this, adjust include.
        * nbsd-tdep.c: Rename to ...
        * netbsd-tdep.c: ... this, adjust include.
        * nbsd-tdep.h: Rename to ...
        * netbsd-tdep.h: ... this.
        * ppc-nbsd-nat.c: Rename to ...
        * ppc-netbsd-nat.c: ... this, adjust include.
        * ppc-nbsd-tdep.c: Rename to ...
        * ppc-netbsd-tdep.c: ... this, adjust include and comment.
        * ppc-nbsd-tdep.h: Rename to ...
        * ppc-netbsd-tdep.h: ... this.
        * sh-nbsd-nat.c: Rename to ...
        * sh-netbsd-nat.c: ... this, adjust include.
        * sh-nbsd-tdep.c: Rename to ...
        * sh-netbsd-tdep.c: ... this, adjust include.
        * sparc-nbsd-nat.c: Rename to ...
        * sparc-netbsd-nat.c: ... this.
        * sparc-nbsd-tdep.c: Rename to ...
        * sparc-netbsd-tdep.c: ... this, adjust include.
        * sparc64-nbsd-nat.c: Rename to ...
        * sparc64-netbsd-nat.c: ... this.
        * sparc64-nbsd-tdep.c: Rename to ...
        * sparc64-netbsd-tdep.c: ... this, adjust include.
        * sparc64-tdep.h: Adjust comment.
        * vax-bsd-nat.c: Adjust include.
        * vax-nbsd-tdep.c: Rename to ...
        * vax-netbsd-tdep.c: ... this, adjust include.

1 files changed, 223 insertions, 0 deletions

diff --git a/gdb/ppc-netbsd-tdep.c b/gdb/ppc-netbsd-tdep.c
new file mode 100644
index 0000000..64f2b40
--- /dev/null
+++ b/gdb/ppc-netbsd-tdep.c
@@ -0,0 +1,223 @@
+/* Target-dependent code for NetBSD/powerpc.
+
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
+
+   Contributed by Wasabi Systems, 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 "gdbtypes.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
+
+#include "ppc-tdep.h"
+#include "netbsd-tdep.h"
+#include "ppc-tdep.h"
+#include "solib-svr4.h"
+
+/* Register offsets from <machine/reg.h>.  */
+struct ppc_reg_offsets ppcnbsd_reg_offsets;
+
+
+/* Core file support.  */
+
+/* NetBSD/powerpc register sets.  */
+
+const struct regset ppcnbsd_gregset =
+{
+  &ppcnbsd_reg_offsets,
+  ppc_supply_gregset
+};
+
+const struct regset ppcnbsd_fpregset =
+{
+  &ppcnbsd_reg_offsets,
+  ppc_supply_fpregset
+};
+
+/* Iterate over core file register note sections.  */
+
+static void
+ppcnbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+				      iterate_over_regset_sections_cb *cb,
+				      void *cb_data,
+				      const struct regcache *regcache)
+{
+  cb (".reg", 148, 148, &ppcnbsd_gregset, NULL, cb_data);
+  cb (".reg2", 264, 264, &ppcnbsd_fpregset, NULL, cb_data);
+}
+
+
+/* NetBSD is confused.  It appears that 1.5 was using the correct SVR4
+   convention but, 1.6 switched to the below broken convention.  For
+   the moment use the broken convention.  Ulgh!  */
+
+static enum return_value_convention
+ppcnbsd_return_value (struct gdbarch *gdbarch, struct value *function,
+		      struct type *valtype, struct regcache *regcache,
+		      gdb_byte *readbuf, const gdb_byte *writebuf)
+{
+#if 0
+  if ((valtype->code () == TYPE_CODE_STRUCT
+       || valtype->code () == TYPE_CODE_UNION)
+      && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8)
+	    && valtype->is_vector ())
+      && !(TYPE_LENGTH (valtype) == 1
+	   || TYPE_LENGTH (valtype) == 2
+	   || TYPE_LENGTH (valtype) == 4
+	   || TYPE_LENGTH (valtype) == 8))
+    return RETURN_VALUE_STRUCT_CONVENTION;
+  else
+#endif
+    return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype,
+					     regcache, readbuf, writebuf);
+}
+
+
+/* Signal trampolines.  */
+
+extern const struct tramp_frame ppcnbsd2_sigtramp;
+
+static void
+ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self,
+			     struct frame_info *this_frame,
+			     struct trad_frame_cache *this_cache,
+			     CORE_ADDR func)
+{
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+  CORE_ADDR addr, base;
+  int i;
+
+  base = get_frame_register_unsigned (this_frame,
+				      gdbarch_sp_regnum (gdbarch));
+  if (self == &ppcnbsd2_sigtramp)
+    addr = base + 0x10 + 2 * tdep->wordsize;
+  else
+    addr = base + 0x18 + 2 * tdep->wordsize;
+  for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
+    {
+      int regnum = i + tdep->ppc_gp0_regnum;
+      trad_frame_set_reg_addr (this_cache, regnum, addr);
+    }
+  trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr);
+  addr += tdep->wordsize;
+  trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr);
+  addr += tdep->wordsize;
+  trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr);
+  addr += tdep->wordsize;
+  trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr);
+  addr += tdep->wordsize;
+  trad_frame_set_reg_addr (this_cache, gdbarch_pc_regnum (gdbarch),
+			   addr); /* SRR0?  */
+  addr += tdep->wordsize;
+
+  /* Construct the frame ID using the function start.  */
+  trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static const struct tramp_frame ppcnbsd_sigtramp =
+{
+  SIGTRAMP_FRAME,
+  4,
+  {
+    { 0x3821fff0, ULONGEST_MAX },		/* add r1,r1,-16 */
+    { 0x4e800021, ULONGEST_MAX },		/* blrl */
+    { 0x38610018, ULONGEST_MAX },		/* addi r3,r1,24 */
+    { 0x38000127, ULONGEST_MAX },		/* li r0,295 */
+    { 0x44000002, ULONGEST_MAX },		/* sc */
+    { 0x38000001, ULONGEST_MAX },		/* li r0,1 */
+    { 0x44000002, ULONGEST_MAX },		/* sc */
+    { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
+  },
+  ppcnbsd_sigtramp_cache_init
+};
+
+/* NetBSD 2.0 introduced a slightly different signal trampoline.  */
+
+const struct tramp_frame ppcnbsd2_sigtramp =
+{
+  SIGTRAMP_FRAME,
+  4,
+  {
+    { 0x3821fff0, ULONGEST_MAX },		/* add r1,r1,-16 */
+    { 0x4e800021, ULONGEST_MAX },		/* blrl */
+    { 0x38610010, ULONGEST_MAX },		/* addi r3,r1,16 */
+    { 0x38000127, ULONGEST_MAX },		/* li r0,295 */
+    { 0x44000002, ULONGEST_MAX },		/* sc */
+    { 0x38000001, ULONGEST_MAX },		/* li r0,1 */
+    { 0x44000002, ULONGEST_MAX },		/* sc */
+    { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
+  },
+  ppcnbsd_sigtramp_cache_init
+};
+
+
+static void
+ppcnbsd_init_abi (struct gdbarch_info info,
+                  struct gdbarch *gdbarch)
+{
+  nbsd_init_abi (info, gdbarch);
+
+  /* For NetBSD, this is an on again, off again thing.  Some systems
+     do use the broken struct convention, and some don't.  */
+  set_gdbarch_return_value (gdbarch, ppcnbsd_return_value);
+
+  /* NetBSD uses SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, ppcnbsd_iterate_over_regset_sections);
+
+  tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp);
+  tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd2_sigtramp);
+}
+
+void _initialize_ppcnbsd_tdep ();
+void
+_initialize_ppcnbsd_tdep ()
+{
+  gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD,
+			  ppcnbsd_init_abi);
+
+  /* Avoid initializing the register offsets again if they were
+     already initialized by ppc-netbsd-nat.c.  */
+  if (ppcnbsd_reg_offsets.pc_offset == 0)
+    {
+      /* General-purpose registers.  */
+      ppcnbsd_reg_offsets.r0_offset = 0;
+      ppcnbsd_reg_offsets.gpr_size = 4;
+      ppcnbsd_reg_offsets.xr_size = 4;
+      ppcnbsd_reg_offsets.lr_offset = 128;
+      ppcnbsd_reg_offsets.cr_offset = 132;
+      ppcnbsd_reg_offsets.xer_offset = 136;
+      ppcnbsd_reg_offsets.ctr_offset = 140;
+      ppcnbsd_reg_offsets.pc_offset = 144;
+      ppcnbsd_reg_offsets.ps_offset = -1;
+      ppcnbsd_reg_offsets.mq_offset = -1;
+
+      /* Floating-point registers.  */
+      ppcnbsd_reg_offsets.f0_offset = 0;
+      ppcnbsd_reg_offsets.fpscr_offset = 256;
+      ppcnbsd_reg_offsets.fpscr_size = 4;
+
+    }
+}