Initial gdbserver support for ARM.

Obtained from:	Juniper Networks, Semihalf

4 files changed, 226 insertions, 4 deletions

diff --git a/gnu/usr.bin/gdb/Makefile b/gnu/usr.bin/gdb/Makefile
index 8f2870b..5cca8c1 100644
--- a/gnu/usr.bin/gdb/Makefile
+++ b/gnu/usr.bin/gdb/Makefile
@@ -2,7 +2,7 @@
 
 SUBDIR=	doc libgdb gdb gdbtui kgdb
 
-.if ${MACHINE_ARCH} == "i386"
+.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "arm"
 SUBDIR+=gdbserver
 .endif
 
diff --git a/gnu/usr.bin/gdb/gdbserver/Makefile b/gnu/usr.bin/gdb/gdbserver/Makefile
index 191232d..29ea01b 100644
--- a/gnu/usr.bin/gdb/gdbserver/Makefile
+++ b/gnu/usr.bin/gdb/gdbserver/Makefile
@@ -10,9 +10,17 @@ GDBDIR=	${.CURDIR}/../../../../contrib/gdb
 
 PROG=	gdbserver
 
-SRCS=	i387-fp.c inferiors.c mem-break.c regcache.c remote-utils.c	\
-	server.c signals.c target.c reg-i386.c utils.c
-SRCS+=	fbsd-low.c fbsd-i386-low.c
+SRCS=	inferiors.c mem-break.c regcache.c remote-utils.c	\
+	server.c signals.c target.c utils.c
+SRCS+=	fbsd-low.c
+
+.if ${MACHINE_ARCH} == "i386"
+SRCS+= fbsd-i386-low.c i387-fp.c reg-i386.c
+.endif
+
+.if ${MACHINE_ARCH} == "arm"
+SRCS+= fbsd-arm-low.c reg-arm.c
+.endif
 
 #CFLAGS+=	-I${.CURDIR}/../arch/${MACHINE_ARCH}
 CFLAGS+=	-I${GDBDIR}/gdb/gdbserver
diff --git a/gnu/usr.bin/gdb/gdbserver/fbsd-arm-low.c b/gnu/usr.bin/gdb/gdbserver/fbsd-arm-low.c
new file mode 100644
index 0000000..faea705
--- /dev/null
+++ b/gnu/usr.bin/gdb/gdbserver/fbsd-arm-low.c
@@ -0,0 +1,146 @@
+/* FreeBSD/ARM specific low level interface, for the remote server for GDB.
+   Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "server.h"
+#include "fbsd-low.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#include <sys/procfs.h>
+#include <sys/ptrace.h>
+
+#define arm_num_regs 26
+
+static int arm_regmap[] = {
+  0, 4, 8, 12, 16, 20, 24, 28,
+  32, 36, 40, 44, 48, 52, 56, 60,
+  -1, -1, -1, -1, -1, -1, -1, -1, -1,
+  64
+};
+
+static int
+arm_cannot_store_register (int regno)
+{
+  return (regno >= arm_num_regs);
+}
+
+static int
+arm_cannot_fetch_register (int regno)
+{
+  return (regno >= arm_num_regs);
+}
+
+extern int debug_threads;
+
+static CORE_ADDR
+arm_get_pc ()
+{
+  unsigned long pc;
+  collect_register_by_name ("pc", &pc);
+  if (debug_threads)
+    fprintf (stderr, "stop pc is %08lx\n", pc);
+  return pc;
+}
+
+static void
+arm_set_pc (CORE_ADDR pc)
+{
+  unsigned long newpc = pc;
+  supply_register_by_name ("pc", &newpc);
+}
+
+/* Correct in either endianness.  We do not support Thumb yet.  */
+static const unsigned long arm_breakpoint = 0xef9f0001;
+#define arm_breakpoint_len 4
+
+static int
+arm_breakpoint_at (CORE_ADDR where)
+{
+  unsigned long insn;
+
+  (*the_target->read_memory) (where, (char *) &insn, 4);
+  if (insn == arm_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
+arm_reinsert_addr ()
+{
+  unsigned long pc;
+  collect_register_by_name ("lr", &pc);
+  return pc;
+}
+
+static void
+arm_fill_gregset (void *buf)
+{
+  int i;
+
+  for (i = 0; i < arm_num_regs; i++)
+	if (arm_regmap[i] != -1)
+		collect_register (i, ((char *) buf) + arm_regmap[i]);
+
+}
+
+static void
+arm_store_gregset (const void *buf)
+{
+  int i;
+
+  for (i = 0; i < arm_num_regs; i++)
+	if (arm_regmap[i] != -1)
+		supply_register (i, ((char *) buf) + arm_regmap[i]);
+
+}
+
+
+struct regset_info target_regsets[] = {
+    {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
+    GENERAL_REGS,
+    arm_fill_gregset, arm_store_gregset },
+    { 0, 0, -1, -1, NULL, NULL }
+};
+
+struct fbsd_target_ops the_low_target = {
+  arm_num_regs,
+  arm_regmap,
+  arm_cannot_fetch_register,
+  arm_cannot_store_register,
+  arm_get_pc,
+  arm_set_pc,
+  (const char *) &arm_breakpoint,
+  arm_breakpoint_len,
+  arm_reinsert_addr,
+  0,
+  arm_breakpoint_at,
+};
diff --git a/gnu/usr.bin/gdb/gdbserver/reg-arm.c b/gnu/usr.bin/gdb/gdbserver/reg-arm.c
new file mode 100644
index 0000000..50379bf
--- /dev/null
+++ b/gnu/usr.bin/gdb/gdbserver/reg-arm.c
@@ -0,0 +1,68 @@
+/* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
+
+/* A register protocol for GDB, the GNU debugger.
+   Copyright 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.  */
+
+/* This file was created with the aid of ``regdat.sh'' and ``reg-arm.dat''.  */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "regdef.h"
+#include "regcache.h"
+
+struct reg regs_arm[] = {
+  { "r0", 0, 32 },
+  { "r1", 32, 32 },
+  { "r2", 64, 32 },
+  { "r3", 96, 32 },
+  { "r4", 128, 32 },
+  { "r5", 160, 32 },
+  { "r6", 192, 32 },
+  { "r7", 224, 32 },
+  { "r8", 256, 32 },
+  { "r9", 288, 32 },
+  { "r10", 320, 32 },
+  { "r11", 352, 32 },
+  { "r12", 384, 32 },
+  { "sp", 416, 32 },
+  { "lr", 448, 32 },
+  { "pc", 480, 32 },
+  { "f0", 512, 96 },
+  { "f1", 608, 96 },
+  { "f2", 704, 96 },
+  { "f3", 800, 96 },
+  { "f4", 896, 96 },
+  { "f5", 992, 96 },
+  { "f6", 1088, 96 },
+  { "f7", 1184, 96 },
+  { "fps", 1280, 32 },
+  { "cpsr", 1312, 32 },
+};
+
+const char *expedite_regs_arm[] = { "r11", "sp", "pc", 0 };
+
+void
+init_registers ()
+{
+    set_register_cache (regs_arm,
+			sizeof (regs_arm) / sizeof (regs_arm[0]));
+    gdbserver_expedite_regs = expedite_regs_arm;
+}