gdbserver: bfin: new port

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

6 files changed, 136 insertions, 3 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 0ff819d..856526c 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,14 @@
+2010-12-29  Jie Zhang  <jie.zhang@analog.com>
+
+	* configure.srv (bfin-*-*linux*): Handle Blackfin/Linux targets.
+	* linux-bfin-low.c: New file.
+	* linux-low.c: Define PT_TEXT_ADDR, PT_TEXT_END_ADDR, and
+	PT_DATA_ADDR for BFIN targets.
+	* Makefile.in (SFILES): Add linux-bfin-low.c.
+	(clean): Remove reg-bfin.c.
+	(linux-bfin-low.o, reg-bfin.o, reg-bfin.c): New targets.
+	* README: Mention supported Blackfin targets.
+
 2010-12-23  Mike Frysinger  <vapier@gentoo.org>
 
 	* .gitignore: New file.
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 7cf68da..44187eb 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -111,8 +111,8 @@ SFILES=	$(srcdir)/gdbreplay.c $(srcdir)/inferiors.c \
 	$(srcdir)/proc-service.list $(srcdir)/regcache.c \
 	$(srcdir)/remote-utils.c $(srcdir)/server.c $(srcdir)/target.c \
 	$(srcdir)/thread-db.c $(srcdir)/utils.c \
-	$(srcdir)/linux-arm-low.c $(srcdir)/linux-cris-low.c \
-	$(srcdir)/linux-crisv32-low.c \
+	$(srcdir)/linux-arm-low.c $(srcdir)/linux-bfin-low.c \
+	$(srcdir)/linux-cris-low.c $(srcdir)/linux-crisv32-low.c \
 	${srcdir}/i386-low.c $(srcdir)/i387-fp.c \
 	$(srcdir)/linux-ia64-low.c $(srcdir)/linux-low.c \
 	$(srcdir)/linux-m32r-low.c \
@@ -263,7 +263,7 @@ clean:
 	rm -f version.c
 	rm -f gdbserver$(EXEEXT) gdbreplay$(EXEEXT) core make.log
 	rm -f $(IPA_LIB)
-	rm -f reg-arm.c i386.c reg-ia64.c reg-m32r.c reg-m68k.c
+	rm -f reg-arm.c reg-bfin.c i386.c reg-ia64.c reg-m32r.c reg-m68k.c
 	rm -f reg-sh.c reg-sparc.c reg-spu.c amd64.c i386-linux.c
 	rm -f reg-cris.c reg-crisv32.c amd64-linux.c reg-xtensa.c
 	rm -f arm-with-iwmmxt.c
@@ -413,6 +413,7 @@ linux-low.o: linux-low.c $(linux_low_h) $(server_h)
 
 linux-arm-low.o: linux-arm-low.c $(linux_low_h) $(server_h) \
 	$(gdb_proc_service_h)
+linux-bfin-low.o: linux-bfin-low.c $(linux_low_h) $(server_h)
 linux-cris-low.o: linux-cris-low.c $(linux_low_h) $(server_h)
 linux-crisv32-low.o: linux-crisv32-low.c $(linux_low_h) $(server_h)
 linux-ia64-low.o: linux-ia64-low.c $(linux_low_h) $(server_h)
@@ -455,6 +456,9 @@ arm-with-vfpv3.c : $(srcdir)/../regformats/arm-with-vfpv3.dat $(regdat_sh)
 arm-with-neon.o : arm-with-neon.c $(regdef_h)
 arm-with-neon.c : $(srcdir)/../regformats/arm-with-neon.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/arm-with-neon.dat arm-with-neon.c
+reg-bfin.o : reg-bfin.c $(regdef_h)
+reg-bfin.c : $(srcdir)/../regformats/reg-bfin.dat $(regdat_sh)
+	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-bfin.dat reg-bfin.c
 reg-cris.o : reg-cris.c $(regdef_h)
 reg-cris.c : $(srcdir)/../regformats/reg-cris.dat $(regdat_sh)
 	$(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-cris.dat reg-cris.c
diff --git a/gdb/gdbserver/README b/gdb/gdbserver/README
index 6debbd8..3eaeb61 100644
--- a/gdb/gdbserver/README
+++ b/gdb/gdbserver/README
@@ -81,6 +81,8 @@ Building GDBserver:
 
 The supported targets as of November 2006 are:
 	arm-*-linux*
+	bfin-*-uclinux
+	bfin-*-linux-uclibc
 	crisv32-*-linux*
 	cris-*-linux*
 	i[34567]86-*-cygwin*
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index 1e8fa30..d6110dd 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -67,6 +67,11 @@ case "${target}" in
 			srv_mingw=yes
 			srv_mingwce=yes
 			;;
+  bfin-*-*linux*)	srv_regobj=reg-bfin.o
+			srv_tgtobj="linux-low.o linux-bfin-low.o"
+			srv_linux_usrregs=yes
+			srv_linux_thread_db=yes
+			;;
   crisv32-*-linux*)	srv_regobj=reg-crisv32.o
 			srv_tgtobj="linux-low.o linux-crisv32-low.o"
 			srv_linux_regsets=yes
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,
+};
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index c65ce54..75fe905 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -4373,6 +4373,10 @@ linux_stopped_data_address (void)
 #define PT_TEXT_ADDR 49*4
 #define PT_DATA_ADDR 50*4
 #define PT_TEXT_END_ADDR  51*4
+#elif defined(BFIN)
+#define PT_TEXT_ADDR 220
+#define PT_TEXT_END_ADDR 224
+#define PT_DATA_ADDR 228
 #endif
 
 /* Under uClinux, programs are loaded at non-zero offsets, which we need