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, 382 insertions, 0 deletions

diff --git a/gdb/mips-netbsd-tdep.c b/gdb/mips-netbsd-tdep.c
new file mode 100644
index 0000000..b6f8773
--- /dev/null
+++ b/gdb/mips-netbsd-tdep.c
@@ -0,0 +1,382 @@
+/* Target-dependent code for NetBSD/mips.
+
+   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 "gdbcore.h"
+#include "regcache.h"
+#include "regset.h"
+#include "target.h"
+#include "value.h"
+#include "osabi.h"
+
+#include "netbsd-tdep.h"
+#include "mips-netbsd-tdep.h"
+#include "mips-tdep.h"
+
+#include "solib-svr4.h"
+
+/* Shorthand for some register numbers used below.  */
+#define MIPS_PC_REGNUM  MIPS_EMBED_PC_REGNUM
+#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
+#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
+
+/* Core file support.  */
+
+/* Number of registers in `struct reg' from <machine/reg.h>.  */
+#define MIPSNBSD_NUM_GREGS	38
+
+/* Number of registers in `struct fpreg' from <machine/reg.h>.  */
+#define MIPSNBSD_NUM_FPREGS	33
+
+/* Supply register REGNUM from the buffer specified by FPREGS and LEN
+   in the floating-point register set REGSET to register cache
+   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
+
+static void
+mipsnbsd_supply_fpregset (const struct regset *regset,
+			  struct regcache *regcache,
+			  int regnum, const void *fpregs, size_t len)
+{
+  size_t regsize = mips_isa_regsize (regcache->arch ());
+  const char *regs = (const char *) fpregs;
+  int i;
+
+  gdb_assert (len >= MIPSNBSD_NUM_FPREGS * regsize);
+
+  for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
+    {
+      if (regnum == i || regnum == -1)
+	regcache->raw_supply (i, regs + (i - MIPS_FP0_REGNUM) * regsize);
+    }
+}
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+   in the general-purpose register set REGSET to register cache
+   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
+
+static void
+mipsnbsd_supply_gregset (const struct regset *regset,
+			 struct regcache *regcache, int regnum,
+			 const void *gregs, size_t len)
+{
+  size_t regsize = mips_isa_regsize (regcache->arch ());
+  const char *regs = (const char *) gregs;
+  int i;
+
+  gdb_assert (len >= MIPSNBSD_NUM_GREGS * regsize);
+
+  for (i = 0; i <= MIPS_PC_REGNUM; i++)
+    {
+      if (regnum == i || regnum == -1)
+	regcache->raw_supply (i, regs + i * regsize);
+    }
+
+  if (len >= (MIPSNBSD_NUM_GREGS + MIPSNBSD_NUM_FPREGS) * regsize)
+    {
+      regs += MIPSNBSD_NUM_GREGS * regsize;
+      len -= MIPSNBSD_NUM_GREGS * regsize;
+      mipsnbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+    }
+}
+
+/* NetBSD/mips register sets.  */
+
+static const struct regset mipsnbsd_gregset =
+{
+  NULL,
+  mipsnbsd_supply_gregset,
+  NULL,
+  REGSET_VARIABLE_SIZE
+};
+
+static const struct regset mipsnbsd_fpregset =
+{
+  NULL,
+  mipsnbsd_supply_fpregset
+};
+
+/* Iterate over core file register note sections.  */
+
+static void
+mipsnbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+				       iterate_over_regset_sections_cb *cb,
+				       void *cb_data,
+				       const struct regcache *regcache)
+{
+  size_t regsize = mips_isa_regsize (gdbarch);
+
+  cb (".reg", MIPSNBSD_NUM_GREGS * regsize, MIPSNBSD_NUM_GREGS * regsize,
+      &mipsnbsd_gregset, NULL, cb_data);
+  cb (".reg2", MIPSNBSD_NUM_FPREGS * regsize, MIPSNBSD_NUM_FPREGS * regsize,
+      &mipsnbsd_fpregset, NULL, cb_data);
+}
+
+
+/* Conveniently, GDB uses the same register numbering as the
+   ptrace register structure used by NetBSD/mips.  */
+
+void
+mipsnbsd_supply_reg (struct regcache *regcache, const char *regs, int regno)
+{
+  struct gdbarch *gdbarch = regcache->arch ();
+  int i;
+
+  for (i = 0; i <= gdbarch_pc_regnum (gdbarch); i++)
+    {
+      if (regno == i || regno == -1)
+	{
+	  if (gdbarch_cannot_fetch_register (gdbarch, i))
+	    regcache->raw_supply (i, NULL);
+	  else
+            regcache->raw_supply
+	      (i, regs + (i * mips_isa_regsize (gdbarch)));
+        }
+    }
+}
+
+void
+mipsnbsd_fill_reg (const struct regcache *regcache, char *regs, int regno)
+{
+  struct gdbarch *gdbarch = regcache->arch ();
+  int i;
+
+  for (i = 0; i <= gdbarch_pc_regnum (gdbarch); i++)
+    if ((regno == i || regno == -1)
+	&& ! gdbarch_cannot_store_register (gdbarch, i))
+      regcache->raw_collect (i, regs + (i * mips_isa_regsize (gdbarch)));
+}
+
+void
+mipsnbsd_supply_fpreg (struct regcache *regcache,
+		       const char *fpregs, int regno)
+{
+  struct gdbarch *gdbarch = regcache->arch ();
+  int i;
+
+  for (i = gdbarch_fp0_regnum (gdbarch);
+       i <= mips_regnum (gdbarch)->fp_implementation_revision;
+       i++)
+    {
+      if (regno == i || regno == -1)
+	{
+	  if (gdbarch_cannot_fetch_register (gdbarch, i))
+	    regcache->raw_supply (i, NULL);
+	  else
+            regcache->raw_supply (i,
+				 fpregs
+				 + ((i - gdbarch_fp0_regnum (gdbarch))
+				    * mips_isa_regsize (gdbarch)));
+	}
+    }
+}
+
+void
+mipsnbsd_fill_fpreg (const struct regcache *regcache, char *fpregs, int regno)
+{
+  struct gdbarch *gdbarch = regcache->arch ();
+  int i;
+
+  for (i = gdbarch_fp0_regnum (gdbarch);
+       i <= mips_regnum (gdbarch)->fp_control_status;
+       i++)
+    if ((regno == i || regno == -1) 
+	&& ! gdbarch_cannot_store_register (gdbarch, i))
+      regcache->raw_collect
+	(i, (fpregs + ((i - gdbarch_fp0_regnum (gdbarch))
+	     * mips_isa_regsize (gdbarch))));
+}
+
+#if 0
+
+/* Under NetBSD/mips, signal handler invocations can be identified by the
+   designated code sequence that is used to return from a signal handler.
+   In particular, the return address of a signal handler points to the
+   following code sequence:
+
+	addu	a0, sp, 16
+	li	v0, 295			# __sigreturn14
+	syscall
+   
+   Each instruction has a unique encoding, so we simply attempt to match
+   the instruction the PC is pointing to with any of the above instructions.
+   If there is a hit, we know the offset to the start of the designated
+   sequence and can then check whether we really are executing in the
+   signal trampoline.  If not, -1 is returned, otherwise the offset from the
+   start of the return sequence is returned.  */
+
+#define RETCODE_NWORDS	3
+#define RETCODE_SIZE	(RETCODE_NWORDS * 4)
+
+static const unsigned char sigtramp_retcode_mipsel[RETCODE_SIZE] =
+{
+  0x10, 0x00, 0xa4, 0x27,	/* addu a0, sp, 16 */
+  0x27, 0x01, 0x02, 0x24,	/* li v0, 295 */
+  0x0c, 0x00, 0x00, 0x00,	/* syscall */
+};
+
+static const unsigned char sigtramp_retcode_mipseb[RETCODE_SIZE] =
+{
+  0x27, 0xa4, 0x00, 0x10,	/* addu a0, sp, 16 */
+  0x24, 0x02, 0x01, 0x27,	/* li v0, 295 */
+  0x00, 0x00, 0x00, 0x0c,	/* syscall */
+};
+
+#endif
+
+/* Figure out where the longjmp will land.  We expect that we have
+   just entered longjmp and haven't yet setup the stack frame, so the
+   args are still in the argument regs.  MIPS_A0_REGNUM points at the
+   jmp_buf structure from which we extract the PC that we will land
+   at.  The PC is copied into *pc.  This routine returns true on
+   success.  */
+
+#define NBSD_MIPS_JB_PC			(2 * 4)
+#define NBSD_MIPS_JB_ELEMENT_SIZE(gdbarch)	mips_isa_regsize (gdbarch)
+#define NBSD_MIPS_JB_OFFSET(gdbarch)		(NBSD_MIPS_JB_PC * \
+					 NBSD_MIPS_JB_ELEMENT_SIZE (gdbarch))
+
+static int
+mipsnbsd_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
+{
+  struct gdbarch *gdbarch = get_frame_arch (frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  CORE_ADDR jb_addr;
+  gdb_byte *buf;
+
+  buf = (gdb_byte *) alloca (NBSD_MIPS_JB_ELEMENT_SIZE (gdbarch));
+
+  jb_addr = get_frame_register_unsigned (frame, MIPS_A0_REGNUM);
+
+  if (target_read_memory (jb_addr + NBSD_MIPS_JB_OFFSET (gdbarch), buf,
+  			  NBSD_MIPS_JB_ELEMENT_SIZE (gdbarch)))
+    return 0;
+
+  *pc = extract_unsigned_integer (buf, NBSD_MIPS_JB_ELEMENT_SIZE (gdbarch),
+				  byte_order);
+  return 1;
+}
+
+static int
+mipsnbsd_cannot_fetch_register (struct gdbarch *gdbarch, int regno)
+{
+  return (regno == MIPS_ZERO_REGNUM
+	  || regno == mips_regnum (gdbarch)->fp_implementation_revision);
+}
+
+static int
+mipsnbsd_cannot_store_register (struct gdbarch *gdbarch, int regno)
+{
+  return (regno == MIPS_ZERO_REGNUM
+	  || regno == mips_regnum (gdbarch)->fp_implementation_revision);
+}
+
+/* Shared library support.  */
+
+/* NetBSD/mips uses a slightly different `struct link_map' than the
+   other NetBSD platforms.  */
+
+static struct link_map_offsets *
+mipsnbsd_ilp32_fetch_link_map_offsets (void)
+{
+  static struct link_map_offsets lmo;
+  static struct link_map_offsets *lmp = NULL;
+
+  if (lmp == NULL) 
+    {
+      lmp = &lmo;
+
+      lmo.r_version_offset = 0;
+      lmo.r_version_size = 4;
+      lmo.r_map_offset = 4;
+      lmo.r_brk_offset = 8;
+      lmo.r_ldsomap_offset = -1;
+
+      /* Everything we need is in the first 24 bytes.  */
+      lmo.link_map_size = 24;
+      lmo.l_addr_offset = 4;
+      lmo.l_name_offset = 8;
+      lmo.l_ld_offset = 12;
+      lmo.l_next_offset = 16;
+      lmo.l_prev_offset = 20;
+    }
+
+  return lmp;
+}
+
+static struct link_map_offsets *
+mipsnbsd_lp64_fetch_link_map_offsets (void)
+{
+  static struct link_map_offsets lmo;
+  static struct link_map_offsets *lmp = NULL;
+
+  if (lmp == NULL)
+    {
+      lmp = &lmo;
+
+      lmo.r_version_offset = 0;
+      lmo.r_version_size = 4;
+      lmo.r_map_offset = 8;
+      lmo.r_brk_offset = 16;
+      lmo.r_ldsomap_offset = -1;
+
+      /* Everything we need is in the first 40 bytes.  */
+      lmo.link_map_size = 48;
+      lmo.l_addr_offset = 0;
+      lmo.l_name_offset = 16; 
+      lmo.l_ld_offset = 24;
+      lmo.l_next_offset = 32;
+      lmo.l_prev_offset = 40;
+    }
+
+  return lmp;
+}
+
+
+static void
+mipsnbsd_init_abi (struct gdbarch_info info,
+                   struct gdbarch *gdbarch)
+{
+  nbsd_init_abi (info, gdbarch);
+
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, mipsnbsd_iterate_over_regset_sections);
+
+  set_gdbarch_get_longjmp_target (gdbarch, mipsnbsd_get_longjmp_target);
+
+  set_gdbarch_cannot_fetch_register (gdbarch, mipsnbsd_cannot_fetch_register);
+  set_gdbarch_cannot_store_register (gdbarch, mipsnbsd_cannot_store_register);
+
+  set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
+
+  /* NetBSD/mips has SVR4-style shared libraries.  */
+  set_solib_svr4_fetch_link_map_offsets
+    (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ?
+	       mipsnbsd_ilp32_fetch_link_map_offsets :
+	       mipsnbsd_lp64_fetch_link_map_offsets));
+}
+
+void _initialize_mipsnbsd_tdep ();
+void
+_initialize_mipsnbsd_tdep ()
+{
+  gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_NETBSD,
+			  mipsnbsd_init_abi);
+}