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, 279 insertions, 0 deletions

diff --git a/gdb/sparc64-netbsd-tdep.c b/gdb/sparc64-netbsd-tdep.c
new file mode 100644
index 0000000..f5329a3
--- /dev/null
+++ b/gdb/sparc64-netbsd-tdep.c
@@ -0,0 +1,279 @@
+/* Target-dependent code for NetBSD/sparc64.
+
+   Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   Based on code 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 "frame.h"
+#include "frame-unwind.h"
+#include "gdbcore.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+#include "symtab.h"
+#include "objfiles.h"
+#include "solib-svr4.h"
+#include "trad-frame.h"
+
+#include "sparc64-tdep.h"
+#include "netbsd-tdep.h"
+
+/* From <machine/reg.h>.  */
+const struct sparc_gregmap sparc64nbsd_gregmap =
+{
+  0 * 8,			/* "tstate" */
+  1 * 8,			/* %pc */
+  2 * 8,			/* %npc */
+  3 * 8,			/* %y */
+  -1,				/* %fprs */
+  -1,
+  5 * 8,			/* %g1 */
+  -1,				/* %l0 */
+  4				/* sizeof (%y) */
+};
+
+
+static void
+sparc64nbsd_supply_gregset (const struct regset *regset,
+			    struct regcache *regcache,
+			    int regnum, const void *gregs, size_t len)
+{
+  sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
+}
+
+static void
+sparc64nbsd_supply_fpregset (const struct regset *regset,
+			     struct regcache *regcache,
+			     int regnum, const void *fpregs, size_t len)
+{
+  sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
+}
+
+
+/* Signal trampolines.  */
+
+/* The following variables describe the location of an on-stack signal
+   trampoline.  The current values correspond to the memory layout for
+   NetBSD 1.3 and up.  These shouldn't be necessary for NetBSD 2.0 and
+   up, since NetBSD uses signal trampolines provided by libc now.  */
+
+static const CORE_ADDR sparc64nbsd_sigtramp_start = 0xffffffffffffdee4ULL;
+static const CORE_ADDR sparc64nbsd_sigtramp_end = 0xffffffffffffe000ULL;
+
+static int
+sparc64nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
+{
+  if (pc >= sparc64nbsd_sigtramp_start && pc < sparc64nbsd_sigtramp_end)
+    return 1;
+
+  return nbsd_pc_in_sigtramp (pc, name);
+}
+
+struct trad_frame_saved_reg *
+sparc64nbsd_sigcontext_saved_regs (CORE_ADDR sigcontext_addr,
+				   struct frame_info *this_frame)
+{
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  struct trad_frame_saved_reg *saved_regs;
+  CORE_ADDR addr, sp;
+  int regnum, delta;
+
+  saved_regs = trad_frame_alloc_saved_regs (this_frame);
+
+  /* The registers are saved in bits and pieces scattered all over the
+     place.  The code below records their location on the assumption
+     that the part of the signal trampoline that saves the state has
+     been executed.  */
+
+  saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
+  saved_regs[SPARC64_PC_REGNUM].addr = sigcontext_addr + 16;
+  saved_regs[SPARC64_NPC_REGNUM].addr = sigcontext_addr + 24;
+  saved_regs[SPARC64_STATE_REGNUM].addr = sigcontext_addr + 32;
+  saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 40;
+  saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 48;
+
+  /* The remaining `global' registers and %y are saved in the `local'
+     registers.  */
+  delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM;
+  for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++)
+    saved_regs[regnum].realreg = regnum + delta;
+  saved_regs[SPARC64_Y_REGNUM].realreg = SPARC_L1_REGNUM;
+
+  /* The remaining `out' registers can be found in the current frame's
+     `in' registers.  */
+  delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM;
+  for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++)
+    saved_regs[regnum].realreg = regnum + delta;
+  saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
+
+  /* The `local' and `in' registers have been saved in the register
+     save area.  */
+  addr = saved_regs[SPARC_SP_REGNUM].addr;
+  sp = get_frame_memory_unsigned (this_frame, addr, 8);
+  for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
+       regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
+    saved_regs[regnum].addr = addr;
+
+  /* Handle StackGhost.  */
+  {
+    ULONGEST wcookie = sparc_fetch_wcookie (gdbarch);
+
+    if (wcookie != 0)
+      {
+	ULONGEST i7;
+
+	addr = saved_regs[SPARC_I7_REGNUM].addr;
+	i7 = get_frame_memory_unsigned (this_frame, addr, 8);
+	trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie);
+      }
+  }
+
+  /* TODO: Handle the floating-point registers.  */
+
+  return saved_regs;
+}
+
+static struct sparc_frame_cache *
+sparc64nbsd_sigcontext_frame_cache (struct frame_info *this_frame,
+				    void **this_cache)
+{
+  struct sparc_frame_cache *cache;
+  CORE_ADDR addr;
+
+  if (*this_cache)
+    return (struct sparc_frame_cache *) *this_cache;
+
+  cache = sparc_frame_cache (this_frame, this_cache);
+  gdb_assert (cache == *this_cache);
+
+  /* If we couldn't find the frame's function, we're probably dealing
+     with an on-stack signal trampoline.  */
+  if (cache->pc == 0)
+    {
+      cache->pc = sparc64nbsd_sigtramp_start;
+
+      /* Since we couldn't find the frame's function, the cache was
+         initialized under the assumption that we're frameless.  */
+      sparc_record_save_insn (cache);
+      addr = get_frame_register_unsigned (this_frame, SPARC_FP_REGNUM);
+      if (addr & 1)
+	addr += BIAS;
+      cache->base = addr;
+    }
+
+  /* We find the appropriate instance of `struct sigcontext' at a
+     fixed offset in the signal frame.  */
+  addr = cache->base + 128 + 8;
+  cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, this_frame);
+
+  return cache;
+}
+
+static void
+sparc64nbsd_sigcontext_frame_this_id (struct frame_info *this_frame,
+				      void **this_cache,
+				      struct frame_id *this_id)
+{
+  struct sparc_frame_cache *cache =
+    sparc64nbsd_sigcontext_frame_cache (this_frame, this_cache);
+
+  (*this_id) = frame_id_build (cache->base, cache->pc);
+}
+
+static struct value *
+sparc64nbsd_sigcontext_frame_prev_register (struct frame_info *this_frame,
+					    void **this_cache, int regnum)
+{
+  struct sparc_frame_cache *cache =
+    sparc64nbsd_sigcontext_frame_cache (this_frame, this_cache);
+
+  return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
+}
+
+static int
+sparc64nbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
+				    struct frame_info *this_frame,
+				    void **this_cache)
+{
+  CORE_ADDR pc = get_frame_pc (this_frame);
+  const char *name;
+
+  find_pc_partial_function (pc, &name, NULL, NULL);
+  if (sparc64nbsd_pc_in_sigtramp (pc, name))
+    {
+      if (name == NULL || !startswith (name, "__sigtramp_sigcontext"))
+	return 1;
+    }
+
+  return 0;
+}
+
+static const struct frame_unwind sparc64nbsd_sigcontext_frame_unwind =
+{
+  SIGTRAMP_FRAME,
+  default_frame_unwind_stop_reason,
+  sparc64nbsd_sigcontext_frame_this_id,
+  sparc64nbsd_sigcontext_frame_prev_register,
+  NULL,
+  sparc64nbsd_sigtramp_frame_sniffer
+};
+
+
+static const struct regset sparc64nbsd_gregset =
+  {
+    NULL, sparc64nbsd_supply_gregset, NULL
+  };
+
+static const struct regset sparc64nbsd_fpregset =
+  {
+    NULL, sparc64nbsd_supply_fpregset, NULL
+  };
+
+static void
+sparc64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  nbsd_init_abi (info, gdbarch);
+
+  tdep->gregset = &sparc64nbsd_gregset;
+  tdep->sizeof_gregset = 160;
+
+  tdep->fpregset =  &sparc64nbsd_fpregset;
+  tdep->sizeof_fpregset = 272;
+
+  /* Make sure we can single-step "new" syscalls.  */
+  tdep->step_trap = sparcnbsd_step_trap;
+
+  frame_unwind_append_unwinder (gdbarch, &sparc64nbsd_sigcontext_frame_unwind);
+
+  sparc64_init_abi (info, gdbarch);
+
+  /* NetBSD/sparc64 has SVR4-style shared libraries.  */
+  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, svr4_lp64_fetch_link_map_offsets);
+}
+
+void _initialize_sparc64nbsd_tdep ();
+void
+_initialize_sparc64nbsd_tdep ()
+{
+  gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
+			  GDB_OSABI_NETBSD, sparc64nbsd_init_abi);
+}