gdb: add support for Blackfin gdbserver

This requires removing "deprecated" markings from gdb-6.6, but this isn't
that big of a deal.  That is the last version with Blackfin support at the
moment and we're in the process of getting mainlined.

[Peter: only mark as undeprecated on bfin]
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

2 files changed, 243 insertions, 3 deletions

diff --git a/toolchain/gdb/6.6/gdb-6.6-bfin-gdbserver.patch b/toolchain/gdb/6.6/gdb-6.6-bfin-gdbserver.patch
new file mode 100644
index 000000000..65c4b908d
--- /dev/null
+++ b/toolchain/gdb/6.6/gdb-6.6-bfin-gdbserver.patch
@@ -0,0 +1,238 @@
+--- gdb-6.6/gdb/gdbserver/configure.srv
++++ gdb-6.6/gdb/gdbserver/configure.srv
+@@ -23,6 +23,11 @@ case "${target}" in
+ 			srv_linux_usrregs=yes
+ 			srv_linux_thread_db=yes
+ 			;;
++  bfin-*-*)		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
+--- gdb-6.6/gdb/gdbserver/linux-bfin-low.c
++++ gdb-6.6/gdb/gdbserver/linux-bfin-low.c
+@@ -0,0 +1,101 @@
++/* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
++
++   Copyright (C) 2005 Free Software Foundation, Inc.
++   Contributed by Analog Devices.
++
++   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., 51 Franklin Street, Fifth Floor,
++   Boston, MA 02110-1301, USA.  */
++
++#include "server.h"
++#include "linux-low.h"
++#include <asm/ptrace.h>
++ 
++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, -1 /* PT_CC */, PT_TEXT_ADDR, PT_TEXT_END_ADDR, PT_DATA_ADDR,
++  PT_FDPIC_EXEC, PT_FDPIC_INTERP,
++  PT_IPEND
++};
++
++#define bfin_num_regs  (sizeof(bfin_regmap) / sizeof(bfin_regmap[0]))
++
++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 ()
++{
++  unsigned long pc;
++  collect_register_by_name ("pc", &pc);
++  return pc;
++}
++
++static void
++bfin_set_pc (CORE_ADDR pc)
++{
++  unsigned long newpc = pc;
++  supply_register_by_name ("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 = {
++  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,
++};
+--- gdb-6.6/gdb/gdbserver/linux-low.c
++++ gdb-6.6/gdb/gdbserver/linux-low.c
+@@ -1592,6 +1592,10 @@ 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
+--- gdb-6.6/gdb/gdbserver/Makefile.in
++++ gdb-6.6/gdb/gdbserver/Makefile.in
+@@ -119,9 +119,9 @@ SFILES=	$(srcdir)/gdbreplay.c $(srcdir)/
+ 	$(srcdir)/mem-break.c $(srcdir)/proc-service.c $(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-i386-low.c \
+-	$(srcdir)/i387-fp.c \
++	$(srcdir)/linux-arm-low.c $(srcdir)/linux-bfin-low.c \
++	$(srcdir)/linux-cris-low.c $(srcdir)/linux-crisv32-low.c \
++	$(srcdir)/linux-i386-low.c $(srcdir)/i387-fp.c \
+ 	$(srcdir)/linux-ia64-low.c $(srcdir)/linux-low.c \
+ 	$(srcdir)/linux-m32r-low.c \
+ 	$(srcdir)/linux-m68k-low.c $(srcdir)/linux-mips-low.c \
+@@ -207,6 +207,7 @@ clean:
+ 	rm -f reg-arm.c reg-i386.c reg-ia64.c reg-m32r.c reg-m68k.c reg-mips.c
+ 	rm -f reg-ppc.c reg-sh.c reg-spu.c reg-x86-64.c reg-i386-linux.c
+ 	rm -f reg-cris.c reg-crisv32.c reg-x86-64-linux.c
++	rm -f reg-bfin.c
+ 
+ maintainer-clean realclean distclean: clean
+ 	rm -f nm.h tm.h xm.h config.status config.h stamp-h config.log
+@@ -272,6 +273,7 @@ linux-low.o: linux-low.c $(linux_low_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-i386-low.o: linux-i386-low.c $(linux_low_h) $(server_h) \
+@@ -294,6 +297,9 @@ spu-low.o: spu-low.c $(server_h)
+ reg-arm.o : reg-arm.c $(regdef_h)
+ reg-arm.c : $(srcdir)/../regformats/reg-arm.dat $(regdat_sh)
+ 	sh $(regdat_sh) $(srcdir)/../regformats/reg-arm.dat reg-arm.c
++reg-bfin.o : reg-bfin.c $(regdef_h)
++reg-bfin.c : $(srcdir)/../regformats/reg-bfin.dat $(regdat_sh)
++	sh $(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)
+ 	sh $(regdat_sh) $(srcdir)/../regformats/reg-cris.dat reg-cris.c
+--- gdb-6.6/gdb/regformats/reg-bfin.dat
++++ gdb-6.6/gdb/regformats/reg-bfin.dat
+@@ -0,0 +1,63 @@
++name:bfin
++expedite:pc,sp,fp
++32:r0
++32:r1
++32:r2
++32:r3
++32:r4
++32:r5
++32:r6
++32:r7
++32:p0
++32:p1
++32:p2
++32:p3
++32:p4
++32:p5
++32:sp
++32:fp
++32:i0
++32:i1
++32:i2
++32:i3
++32:m0
++32:m1
++32:m2
++32:m3
++32:b0
++32:b1
++32:b2
++32:b3
++32:l0
++32:l1
++32:l2
++32:l3
++32:a0x
++32:a0w
++32:a1x
++32:a1w
++32:astat
++32:rets 
++32:lc0
++32:lt0
++32:lb0
++32:lc1
++32:lt1
++32:lb1
++32:cycles
++32:cycles2
++32:usp
++32:seqstat
++32:syscfg
++32:reti
++32:retx
++32:retn
++32:rete
++32:pc
++32:cc
++32:text_addr
++32:text_end_addr
++32:data_addr
++32:fdpic_exec
++32:fdpic_interp
++32:ipend
diff --git a/toolchain/gdb/Config.in b/toolchain/gdb/Config.in
index b45de9a70..8295f798b 100644
--- a/toolchain/gdb/Config.in
+++ b/toolchain/gdb/Config.in
@@ -35,10 +35,10 @@ choice
 	config BR2_GDB_VERSION_6_6
 		bool "gdb 6.6"
 		depends on !BR2_avr32
-		depends on BR2_DEPRECATED
+		depends on BR2_DEPRECATED || BR2_bfin
 
 	config BR2_GDB_VERSION_6_7_1
-		depends on !BR2_avr32
+		depends on !(BR2_avr32 || BR2_bfin)
 		bool "gdb 6.7.1"
 
 	config BR2_GDB_VERSION_6_7_1_AVR32_2_1_5
@@ -47,14 +47,16 @@ choice
 
 	config BR2_GDB_VERSION_6_8
 		bool "gdb 6.8"
-		depends on !BR2_avr32
+		depends on !(BR2_avr32 || BR2_bfin)
 
 	config BR2_GDB_VERSION_7_0_1
 		bool "gdb 7.0.1"
+		depends on !BR2_bfin
 		select BR2_PTHREAD_DEBUG if !BR2_PTHREADS_NONE
 
 	config BR2_GDB_VERSION_7_1
 		bool "gdb 7.1"
+		depends on !BR2_bfin
 		select BR2_PTHREAD_DEBUG if !BR2_PTHREADS_NONE
 
 endchoice