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gdb: add support for Blackfin gdbserver

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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>
This commit is contained in:
Mike Frysinger 2011-02-07 00:49:12 -05:00 committed by Peter Korsgaard
parent 871db074b1
commit c574441c2a
2 changed files with 243 additions and 3 deletions

238
toolchain/gdb/6.6/gdb-6.6-bfin-gdbserver.patch Normal file
View File

@ -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

8
toolchain/gdb/Config.in
View File

@ -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