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[PATCH 4/4] Add native target for FreeBSD/arm.
- From: John Baldwin <jhb at FreeBSD dot org>
- To: gdb-patches at sourceware dot org, binutils at sourceware dot org
- Date: Thu, 14 Sep 2017 08:18:31 -0700
- Subject: [PATCH 4/4] Add native target for FreeBSD/arm.
- Authentication-results: sourceware.org; auth=none
- References: <20170914151831.65362-1-jhb@FreeBSD.org>
gdb/ChangeLog:
* Makefile.in (ALLDEPFILES): Add arm-fbsd-nat.c.
* NEWS: Mention new FreeBSD/arm native configuration.
* configure.host: Add arm*-*-freebsd*.
* configure.nat: Likewise.
* arm-fbsd-nat.c: New file.
---
gdb/ChangeLog | 8 +++
gdb/Makefile.in | 1 +
gdb/NEWS | 1 +
gdb/arm-fbsd-nat.c | 151 +++++++++++++++++++++++++++++++++++++++++++++++++++++
gdb/configure.host | 1 +
gdb/configure.nat | 5 ++
6 files changed, 167 insertions(+)
create mode 100644 gdb/arm-fbsd-nat.c
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 74928c0113..f69bd06aec 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
2017-09-14 John Baldwin <jhb@FreeBSD.org>
+ * Makefile.in (ALLDEPFILES): Add arm-fbsd-nat.c.
+ * NEWS: Mention new FreeBSD/arm native configuration.
+ * configure.host: Add arm*-*-freebsd*.
+ * configure.nat: Likewise.
+ * arm-fbsd-nat.c: New file.
+
+2017-09-14 John Baldwin <jhb@FreeBSD.org>
+
* Makefile.in (ALL_TARGET_OBS): Add arm-fbsd-tdep.o.
(ALLDEPFILES): Add arm-fbsd-tdep.c.
* NEWS: Mention new FreeBSD/arm target.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 3468e34b6e..52f1c5cd19 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -2530,6 +2530,7 @@ ALLDEPFILES = \
arc-tdep.c \
arm.c \
arm-bsd-tdep.c \
+ arm-fbsd-nat.c \
arm-fbsd-tdep.c \
arm-get-next-pcs.c \
arm-linux.c \
diff --git a/gdb/NEWS b/gdb/NEWS
index f33b7ac49f..c54a458530 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -101,6 +101,7 @@ show debug separate-debug-file
* New native configurations
FreeBSD/aarch64 aarch64*-*-freebsd*
+FreeBSD/arm arm*-*-freebsd*
* New targets
diff --git a/gdb/arm-fbsd-nat.c b/gdb/arm-fbsd-nat.c
new file mode 100644
index 0000000000..b1c5c360f8
--- /dev/null
+++ b/gdb/arm-fbsd-nat.c
@@ -0,0 +1,151 @@
+/* Native-dependent code for FreeBSD/arm.
+
+ Copyright (C) 2017 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 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 "defs.h"
+#include "target.h"
+
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#include "fbsd-nat.h"
+#include "arm-tdep.h"
+#include "arm-fbsd-tdep.h"
+#include "inf-ptrace.h"
+
+/* Determine if PT_GETREGS fetches REGNUM. */
+
+static bool
+getregs_supplies (struct gdbarch *gdbarch, int regnum)
+{
+ return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM)
+ || regnum == ARM_PS_REGNUM);
+}
+
+#ifdef PT_GETVFPREGS
+/* Determine if PT_GETVFPREGS fetches REGNUM. */
+
+static bool
+getvfpregs_supplies (struct gdbarch *gdbarch, int regnum)
+{
+ return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM)
+ || regnum == ARM_FPSCR_REGNUM);
+}
+#endif
+
+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
+ for all registers. */
+
+static void
+arm_fbsd_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
+{
+ pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+ {
+ struct reg regs;
+
+ if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ regcache->supply_regset (&arm_fbsd_gregset, regnum, ®s,
+ sizeof (regs));
+ }
+
+#ifdef PT_GETVFPREGS
+ if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
+ {
+ struct vfpreg vfpregs;
+
+ if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ regcache->supply_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
+ sizeof (vfpregs));
+ }
+#endif
+}
+
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers. */
+
+static void
+arm_fbsd_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regnum)
+{
+ pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+ {
+ struct reg regs;
+
+ if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ regcache->collect_regset (&arm_fbsd_gregset, regnum, ®s,
+ sizeof (regs));
+
+ if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't write registers"));
+ }
+
+#ifdef PT_GETVFPREGS
+ if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
+ {
+ struct vfpreg vfpregs;
+
+ if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ regcache->collect_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
+ sizeof (vfpregs));
+
+ if (ptrace (PT_SETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
+ perror_with_name (_("Couldn't write floating point status"));
+ }
+#endif
+}
+
+/* Implement the to_read_description method. */
+
+static const struct target_desc *
+arm_fbsd_read_description (struct target_ops *ops)
+{
+ const struct target_desc *desc;
+
+ desc = arm_fbsd_read_description_auxv (ops);
+ if (desc == NULL)
+ desc = ops->beneath->to_read_description (ops->beneath);
+ return desc;
+}
+
+void
+_initialize_arm_fbsd_nat (void)
+{
+ struct target_ops *t;
+
+ t = inf_ptrace_target ();
+ t->to_fetch_registers = arm_fbsd_fetch_inferior_registers;
+ t->to_store_registers = arm_fbsd_store_inferior_registers;
+ t->to_read_description = arm_fbsd_read_description;
+ fbsd_nat_add_target (t);
+}
diff --git a/gdb/configure.host b/gdb/configure.host
index 304675f137..ee53f25e9e 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -91,6 +91,7 @@ alpha*-*-netbsd* | alpha*-*-knetbsd*-gnu)
gdb_host=nbsd ;;
alpha*-*-openbsd*) gdb_host=nbsd ;;
+arm*-*-freebsd*) gdb_host=fbsd ;;
arm*-*-linux*) gdb_host=linux ;;
arm*-*-netbsdelf* | arm*-*-knetbsd*-gnu)
gdb_host=nbsdelf ;;
diff --git a/gdb/configure.nat b/gdb/configure.nat
index a318b4a5a9..c08079b7ea 100644
--- a/gdb/configure.nat
+++ b/gdb/configure.nat
@@ -150,6 +150,11 @@ case ${gdb_host} in
NATDEPFILES="${NATDEPFILES} aarch64-fbsd-nat.o"
LOADLIBES=
;;
+ arm)
+ # Host: FreeBSD/arm
+ NATDEPFILES="${NATDEPFILES} arm-fbsd-nat.o"
+ LOADLIBES=
+ ;;
i386)
# Host: FreeBSD/i386
NATDEPFILES="${NATDEPFILES} x86-nat.o x86-dregs.o \
--
2.13.3