1 files changed, 156 insertions, 0 deletions
diff --git a/gnu/usr.bin/gdb/gdbserver/fbsd-powerpc-low.c b/gnu/usr.bin/gdb/gdbserver/fbsd-powerpc-low.c
new file mode 100644
index 000000000000..35f7ac650928
--- /dev/null
+++ b/gnu/usr.bin/gdb/gdbserver/fbsd-powerpc-low.c
@@ -0,0 +1,156 @@
+/* FreeBSD/PowerPC specific low level interface, for the remote server for
+   GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
+   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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "server.h"
+#include "fbsd-low.h"
+
+#include <sys/procfs.h>
+#include <sys/ptrace.h>
+
+#define ppc_num_regs 71
+
+/* Currently, don't check/send MQ.  */
+static int ppc_regmap[] =
+ { 0, 4, 8, 12, 16, 20, 24, 28,
+   32, 36, 40, 44, 48, 52, 56, 60,
+   64, 68, 72, 76, 80, 84, 88, 92,
+   96, 100, 104, 108, 112, 116, 120, 124,
+#if 0
+  /*
+   * XXX on FreeBSD the gdbserver for PowerPC was only tested with FPU-less
+   * cores i.e. e500. Let's leave the original FPR references around in case
+   * someone picks up and brings support for AIM-like FPU machines.
+   */
+  PT_FPR0*4,     PT_FPR0*4 + 8, PT_FPR0*4+16,  PT_FPR0*4+24,
+  PT_FPR0*4+32,  PT_FPR0*4+40,  PT_FPR0*4+48,  PT_FPR0*4+56,
+  PT_FPR0*4+64,  PT_FPR0*4+72,  PT_FPR0*4+80,  PT_FPR0*4+88,
+  PT_FPR0*4+96,  PT_FPR0*4+104,  PT_FPR0*4+112,  PT_FPR0*4+120,
+  PT_FPR0*4+128, PT_FPR0*4+136,  PT_FPR0*4+144,  PT_FPR0*4+152,
+  PT_FPR0*4+160,  PT_FPR0*4+168,  PT_FPR0*4+176,  PT_FPR0*4+184,
+  PT_FPR0*4+192,  PT_FPR0*4+200,  PT_FPR0*4+208,  PT_FPR0*4+216,
+  PT_FPR0*4+224,  PT_FPR0*4+232,  PT_FPR0*4+240,  PT_FPR0*4+248,
+#endif
+   -1, -1, -1, -1, -1, -1, -1, -1,
+   -1, -1, -1, -1, -1, -1, -1, -1,
+   -1, -1, -1, -1, -1, -1, -1, -1,
+   -1, -1, -1, -1, -1, -1, -1, -1,
+   144, -1, 132, 128, 140, 136, -1
+ };
+
+static int
+ppc_cannot_store_register (int regno)
+{
+  /* Some kernels do not allow us to store fpscr.  */
+  if (regno == find_regno ("fpscr"))
+    return 2;
+
+  return 0;
+}
+
+static int
+ppc_cannot_fetch_register (int regno)
+{
+  return 0;
+}
+
+static CORE_ADDR
+ppc_get_pc (void)
+{
+  unsigned long pc;
+
+  collect_register_by_name ("pc", &pc);
+  return (CORE_ADDR) pc;
+}
+
+static void
+ppc_set_pc (CORE_ADDR pc)
+{
+  unsigned long newpc = pc;
+
+  supply_register_by_name ("pc", &newpc);
+}
+
+/* Correct in either endianness.  Note that this file is
+   for PowerPC only, not PowerPC64.
+   This instruction is "twge r2, r2", which GDB uses as a software
+   breakpoint.  */
+static const unsigned long ppc_breakpoint = 0x7d821008;
+#define ppc_breakpoint_len 4
+
+static int
+ppc_breakpoint_at (CORE_ADDR where)
+{
+  unsigned long insn;
+
+  (*the_target->read_memory) (where, (char *) &insn, 4);
+  if (insn == ppc_breakpoint)
+    return 1;
+  /* If necessary, recognize more trap instructions here.  GDB only uses the
+     one.  */
+  return 0;
+}
+
+static void
+ppc_fill_gregset (void *buf)
+{
+  int i;
+
+  for (i = 0; i < ppc_num_regs; i++)
+	if (ppc_regmap[i] != -1)
+		collect_register (i, ((char *) buf) + ppc_regmap[i]);
+
+}
+
+static void
+ppc_store_gregset (const void *buf)
+{
+  int i;
+
+  for (i = 0; i < ppc_num_regs; i++)
+	if (ppc_regmap[i] != -1)
+		supply_register (i, ((char *) buf) + ppc_regmap[i]);
+
+}
+
+struct regset_info target_regsets[] = {
+  { PT_GETREGS, PT_SETREGS, sizeof (struct reg),
+    GENERAL_REGS,
+    ppc_fill_gregset, ppc_store_gregset },
+  { 0, 0, -1, -1, NULL, NULL }
+};
+
+struct fbsd_target_ops the_low_target = {
+  ppc_num_regs,
+  ppc_regmap,
+  ppc_cannot_fetch_register,
+  ppc_cannot_store_register,
+  ppc_get_pc,
+  ppc_set_pc,
+  (const char *) &ppc_breakpoint,
+  ppc_breakpoint_len,
+  NULL,
+  0,
+  ppc_breakpoint_at,
+};