gdbserver: bfin: new port

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/gdb/gdbserver/linux-bfin-low.c b/gdb/gdbserver/linux-bfin-low.c
new file mode 100644
index 0000000..577992d
--- /dev/null
+++ b/gdb/gdbserver/linux-bfin-low.c
@@ -0,0 +1,107 @@
+/* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
+
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
+   Free Software Foundation, Inc.
+
+   Contributed by Analog Devices, 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 "server.h"
+#include "linux-low.h"
+#include "libiberty.h"
+#include <asm/ptrace.h>
+
+/* Defined in auto-generated file reg-bfin.c.  */
+void init_registers_bfin (void);
+
+static int bfin_regmap[] =
+{
+  PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
+  PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP,
+  PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3,
+  PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3,
+  PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS,
+  PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1,
+  -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
+  -1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE,
+  PT_PC,
+};
+
+#define bfin_num_regs ARRAY_SIZE (bfin_regmap)
+
+static int
+bfin_cannot_store_register (int regno)
+{
+  return (regno >= bfin_num_regs);
+}
+
+static int
+bfin_cannot_fetch_register (int regno)
+{
+  return (regno >= bfin_num_regs);
+}
+
+static CORE_ADDR
+bfin_get_pc (struct regcache *regcache)
+{
+  unsigned long pc;
+
+  collect_register_by_name (regcache, "pc", &pc);
+
+  return pc;
+}
+
+static void
+bfin_set_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+  unsigned long newpc = pc;
+
+  supply_register_by_name (regcache, "pc", &newpc);
+}
+
+#define bfin_breakpoint_len 2
+static const unsigned char bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00};
+
+static int
+bfin_breakpoint_at (CORE_ADDR where)
+{
+  unsigned char insn[bfin_breakpoint_len];
+
+  read_inferior_memory(where, insn, bfin_breakpoint_len);
+  if (insn[0] == bfin_breakpoint[0]
+      && insn[1] == bfin_breakpoint[1])
+    return 1;
+
+  /* If necessary, recognize more trap instructions here.  GDB only uses the
+     one.  */
+  return 0;
+}
+
+struct linux_target_ops the_low_target = {
+  init_registers_bfin,
+  bfin_num_regs,
+  bfin_regmap,
+  bfin_cannot_fetch_register,
+  bfin_cannot_store_register,
+  bfin_get_pc,
+  bfin_set_pc,
+  bfin_breakpoint,
+  bfin_breakpoint_len,
+  0,
+  2,
+  bfin_breakpoint_at,
+};