2005-05-23 Orjan Friberg <orjanf@axis.com>

	* linux-cris-low.c: New file with support for CRIS.
	* linux-crisv32-low.c: Ditto for CRISv32.
	* Makefile.in (SFILES): Add linux-cris-low.c, linux-crisv32-low.c.
	(clean): Add reg-cris.c and reg-crisv32.c.
	Add linux-cris-low.o, linux-crisv32-low.o, reg-cris.o, reg-cris.c,
	reg-crisv32.o, and reg-crisv32.c to make rules.
	* configure.srv: Add cris-*-linux* and crisv32-*-linux* to list of
	recognized targets.

1 files changed, 124 insertions, 0 deletions

diff --git a/gdb/gdbserver/linux-cris-low.c b/gdb/gdbserver/linux-cris-low.c
new file mode 100644
index 0000000..7777685
--- /dev/null
+++ b/gdb/gdbserver/linux-cris-low.c
@@ -0,0 +1,124 @@
+/* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+   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 "server.h"
+#include "linux-low.h"
+#include <sys/ptrace.h>
+
+/* CRISv10 */
+#define cris_num_regs 32
+
+/* Locations need to match <include/asm/arch/ptrace.h>.  */
+static int cris_regmap[] = {
+  15*4, 14*4, 13*4, 12*4,
+  11*4, 10*4, 9*4, 8*4,
+  7*4, 6*4, 5*4, 4*4,
+  3*4, 2*4, 23*4, 19*4,
+
+  -1, -1, -1, -1,
+  -1, 17*4, -1, 16*4,
+  -1, -1, -1, 18*4,
+  -1, 17*4, -1, -1
+  
+};
+
+static int
+cris_cannot_store_register (int regno)
+{
+  if (cris_regmap[regno] == -1)
+    return 1;
+  
+  return (regno >= cris_num_regs);
+}
+
+static int
+cris_cannot_fetch_register (int regno)
+{
+  if (cris_regmap[regno] == -1)
+    return 1;
+
+  return (regno >= cris_num_regs);
+}
+
+extern int debug_threads;
+
+static CORE_ADDR
+cris_get_pc (void)
+{
+  unsigned long pc;
+  collect_register_by_name ("pc", &pc);
+  if (debug_threads)
+    fprintf (stderr, "stop pc is %08lx\n", pc);
+  return pc;
+}
+
+static void
+cris_set_pc (CORE_ADDR pc)
+{
+  unsigned long newpc = pc;
+  supply_register_by_name ("pc", &newpc);
+}
+
+static const unsigned short cris_breakpoint = 0xe938;
+#define cris_breakpoint_len 2
+
+static int
+cris_breakpoint_at (CORE_ADDR where)
+{
+  unsigned short insn;
+
+  (*the_target->read_memory) (where, (char *) &insn, cris_breakpoint_len);
+  if (insn == cris_breakpoint)
+    return 1;
+
+  /* If necessary, recognize more trap instructions here.  GDB only uses the
+     one.  */
+  return 0;
+}
+
+/* We only place breakpoints in empty marker functions, and thread locking
+   is outside of the function.  So rather than importing software single-step,
+   we can just run until exit.  */
+static CORE_ADDR
+cris_reinsert_addr (void)
+{
+  unsigned long pc;
+  collect_register_by_name ("srp", &pc);
+  return pc;
+}
+
+struct linux_target_ops the_low_target = {
+  cris_num_regs,
+  cris_regmap,
+  cris_cannot_fetch_register,
+  cris_cannot_store_register,
+  cris_get_pc,
+  cris_set_pc,
+  (const char *) &cris_breakpoint,
+  cris_breakpoint_len,
+  cris_reinsert_addr,
+  0,
+  cris_breakpoint_at,
+  0,
+  0,
+  0,
+  0,
+};