[vxworks 13/14] Add tdep files for x86 and powerpc.

Joel Brobecker
2010-04-25T15:48:26Z

This patch adds a new GDB_OSABI_VXWORKS for VxWorks targets, and
introduces new VxWorks tdep files for x86 and powerpc. They will
be included in the build by the next patch.

2010-04-24 Joel Brobecker <brobecker@adacore.com>

* defs.h (enum gdb_osabi): Add GDB_OSABI_VXWORKS.
* osabi.c (gdb_osabi_names): Add entry for GDB_OSABI_VXWORKS.
* i386-vxworks-tdep.c, rs6000-vxworks-tdep.c: New files.
---
gdb/defs.h | 1 +
gdb/i386-vxworks-tdep.c | 53 +++++++++++++++++++++++
gdb/osabi.c | 1 +
gdb/rs6000-vxworks-tdep.c | 105 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 160 insertions(+), 0 deletions(-)
create mode 100644 gdb/i386-vxworks-tdep.c
create mode 100644 gdb/rs6000-vxworks-tdep.c

diff --git a/gdb/defs.h b/gdb/defs.h
index e8a1dd4..a7f69ae 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -986,6 +986,7 @@ enum gdb_osabi
GDB_OSABI_QNXNTO,
GDB_OSABI_CYGWIN,
GDB_OSABI_AIX,
+ GDB_OSABI_VXWORKS,
GDB_OSABI_DICOS,
GDB_OSABI_DARWIN,
GDB_OSABI_SYMBIAN,
diff --git a/gdb/i386-vxworks-tdep.c b/gdb/i386-vxworks-tdep.c
new file mode 100644
index 0000000..a2248c8
--- /dev/null
+++ b/gdb/i386-vxworks-tdep.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 2007, 2010 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 "inferior.h"
+#include "osabi.h"
+#include "i386-tdep.h"
+
+static void
+i386_vxworks_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ /* The AT_ENTRY_POINT method is not practical on VxWorks systems,
+ because there is no concept of "the" executable. Furthermore,
+ memory space is shared by all processes (and thus someone
+ spawning a new task using the same entry point might interfere
+ with our function call). So we rely on the ON_STACK method
+ instead. */
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+}
+
+static enum gdb_osabi
+i386_vxworks_osabi_sniffer (bfd * abfd)
+{
+ char *target_name = bfd_get_target (abfd);
+
+ if (strstr (target_name, "vxworks") != NULL)
+ return GDB_OSABI_VXWORKS;
+
+ return GDB_OSABI_UNKNOWN;
+}
+void
+_initialize_vxworks_tdep (void)
+{
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
+ i386_vxworks_osabi_sniffer);
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_VXWORKS,
+ i386_vxworks_init_abi);
+}
+
diff --git a/gdb/osabi.c b/gdb/osabi.c
index 84590cd..60171e1 100644
--- a/gdb/osabi.c
+++ b/gdb/osabi.c
@@ -70,6 +70,7 @@ static const char * const gdb_osabi_names[] =
"QNX Neutrino",
"Cygwin",
"AIX",
+ "VxWorks",
"DICOS",
"Darwin",
"Symbian",
diff --git a/gdb/rs6000-vxworks-tdep.c b/gdb/rs6000-vxworks-tdep.c
new file mode 100644
index 0000000..2f10bfd
--- /dev/null
+++ b/gdb/rs6000-vxworks-tdep.c
@@ -0,0 +1,105 @@
+/* Target-dependent code for GDB, the GNU debugger.
+
+ Copyright (C) 2009, 2010 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 "gdbarch.h"
+#include "osabi.h"
+#include "ppc-tdep.h"
+#include "gdb_assert.h"
+#include "inferior.h"
+#include "gdb_string.h"
+
+static CORE_ADDR
+rs6000_vxworks_push_dummy_code (struct gdbarch *gdbarch,
+ CORE_ADDR sp, CORE_ADDR funaddr,
+ struct value **args, int nargs,
+ struct type *value_type,
+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
+ struct regcache *regcache)
+{
+ /* Something here to findout the size of a breakpoint and then
+ allocate space for it on the stack. */
+ int bplen;
+ /* This code assumes frame align. */
+ gdb_assert (gdbarch_frame_align_p (gdbarch));
+ /* Force the stack's alignment. The intent is to ensure that the SP
+ is aligned to at least a breakpoint instruction's boundary. */
+ sp = gdbarch_frame_align (gdbarch, sp);
+ /* Allocate space for, and then position the breakpoint on the stack. */
+ if (gdbarch_inner_than (gdbarch, 1, 2))
+ {
+ CORE_ADDR bppc = sp;
+ gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
+ sp = gdbarch_frame_align (gdbarch, sp - bplen);
+ (*bp_addr) = sp;
+ /* Should the breakpoint size/location be re-computed here? */
+ }
+ else
+ {
+ (*bp_addr) = sp;
+ gdbarch_breakpoint_from_pc (gdbarch, bp_addr, &bplen);
+ sp = gdbarch_frame_align (gdbarch, sp + bplen);
+ }
+ /* Inferior resumes at the function entry point. */
+ (*real_pc) = funaddr;
+ return sp;
+}
+
+static void
+rs6000_vxworks_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Certain versions of VxWorks do not provide support for Altivec
+ registers. For now, disable support for these registers on all
+ versions of GDB. */
+ tdep->ppc_vr0_regnum = -1;
+ tdep->ppc_vrsave_regnum = -1;
+
+ /* The AT_ENTRY_POINT method is not practical on VxWorks systems,
+ because there is no concept of "the" executable. Furthermore,
+ memory space is shared by all processes (and thus someone
+ spawning a new task using the same entry point might interfere
+ with our function call). So we rely on the ON_STACK method
+ instead. */
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+ set_gdbarch_push_dummy_code (gdbarch, rs6000_vxworks_push_dummy_code);
+}
+
+static enum gdb_osabi
+rs6000_vxworks_osabi_sniffer (bfd * abfd)
+{
+ char *target_name = bfd_get_target (abfd);
+
+ if (strstr (target_name, "vxworks") != NULL)
+ return GDB_OSABI_VXWORKS;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+void
+_initialize_rs6000_vxworks_tdep (void)
+{
+ /* Register the sniffer for the VxWorks targets. */
+ gdbarch_register_osabi_sniffer (bfd_arch_powerpc, bfd_target_elf_flavour,
+ rs6000_vxworks_osabi_sniffer);
+ gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_VXWORKS,
+ rs6000_vxworks_init_abi);
+}
+
--
1.6.3.3