2009-02-06 Pedro Alves <pedro@codesourcery.com>

	gdb/
	* target.h (enum target_object): Add new TARGET_OBJECT_SIGNAL_INFO.
	* infrun.c (siginfo_value_read, siginfo_value_write): New.
	(siginfo_value_funcs): New.
	(siginfo_make_value): New.
	(_initialize_infrun): Create the $_siginfo convenience variable.
	* gdbtypes.h (append_composite_type_field_aligned): Declare.
	* gdbtypes.c (append_composite_type_field): Rename to...
	(append_composite_type_field_aligned): ... this.  Add ALIGNMENT
	argument.  Handle it.
	(append_composite_type_field): Rewrite on top of
	append_composite_type_field_aligned.
	* value.h (internalvar_make_value): New typedef.
	(struct internalvar) <make_value>: New field.
	(create_internalvar_type_lazy): Declare.
	* value.c (create_internalvar): Clear make_value.
	(create_internalvar_type_lazy): New.
	(value_of_internalvar): If make_value is set use it.
	(preserve_values): Skip internal variables that don't have a
	value.
	* gdbarch.sh (get_siginfo_type): New.
	* gdbarch.h, gdbarch.c: Regenerate.

	* linux-tdep.h, linux-tdep.c: New.
	* amd64-linux-tdep.c: Include "linux-tdep.h".
	(amd64_linux_init_abi): Register linux_get_siginfo_type and
	linux_get_siginfo_mapper.
	* i386-linux-tdep.c: Include "linux-tdep.h".
	(i386_linux_init_abi): Register linux_get_siginfo_type and
	linux_get_siginfo_mapper.
	* arm-linux-tdep.c: Include "linux-tdep.h".
	(i386_linux_init_abi): Register linux_get_siginfo_type and
	linux_get_siginfo_mapper.

	* linux-nat.c (linux_xfer_siginfo): New.
	(linux_nat_xfer_partial): Handle TARGET_OBJECT_SIGNAL_INFO.
	* remote.c (PACKET_qXfer_siginfo_read)
	(PACKET_qXfer_siginfo_write): New.
	(feature remote_protocol_features): Add "qXfer:siginfo:read" and
	"qXfer:siginfo:write" features.
	(remote_xfer_partial): Handle TARGET_OBJECT_SIGNAL_INFO.
	(_initialize_remote): Add "set/show remote read-siginfo-object"
	and "set/show remote write-siginfo-object" commands.

	* Makefile.in (ALL_TARGET_OBS): Add linux-tdep.o.
	(HFILES_NO_SRCDIR): Add linux-tdep.h.
	(ALLDEPFILES): Add linux-tdep.c.

	* configure.tgt (arm*-*-linux* | arm*-*-uclinux*)
	(i[34567]86-*-linux*, x86_64-*-linux*): Add linux-tdep.o to
	gdb_target_obs.

2009-02-06  Pedro Alves  <pedro@codesourcery.com>

	gdb/gdbserver/
	* server.c (handle_query): Report qXfer:siginfo:read and
	qXfer:siginfo:write as supported and handle them.
	* target.h (struct target_ops) <qxfer_siginfo>: New field.
	* linux-low.c (linux_xfer_siginfo): New.
	(linux_target_ops): Set it.

2009-02-06  Pedro Alves  <pedro@codesourcery.com>

	gdb/doc/
	* gdb.texinfo (Signals): Document $_siginfo.
	(Convenience Variables): Mention $_siginfo.
	(Remote Configuration): Document qXfer:siginfo:read,
	qXfer:siginfo:write packets, and the read-siginfo-object,
	write-siginfo-object commands.

2009-02-06  Pedro Alves  <pedro@codesourcery.com>

	gdb/testsuite/
	* gdb.base/siginfo-obj.c, gdb.base/siginfo-obj.exp: New.

1 files changed, 25 insertions, 0 deletions

diff --git a/gdb/remote.c b/gdb/remote.c
index aeeb8b8..af2c10b 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -998,6 +998,8 @@ enum {
   PACKET_vRun,
   PACKET_QStartNoAckMode,
   PACKET_vKill,
+  PACKET_qXfer_siginfo_read,
+  PACKET_qXfer_siginfo_write,
   PACKET_MAX
 };
 
@@ -2962,6 +2964,10 @@ static struct protocol_feature remote_protocol_features[] = {
     PACKET_QStartNoAckMode },
   { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
   { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
+  { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
+    PACKET_qXfer_siginfo_read },
+  { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
+    PACKET_qXfer_siginfo_write },
 };
 
 static void
@@ -7323,6 +7329,19 @@ remote_xfer_partial (struct target_ops *ops, enum target_object object,
 				     [PACKET_qXfer_spu_write]);
     }
 
+  /* Handle extra signal info using qxfer packets.  */
+  if (object == TARGET_OBJECT_SIGNAL_INFO)
+    {
+      if (readbuf)
+	return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
+				  &remote_protocol_packets
+				  [PACKET_qXfer_siginfo_read]);
+      else
+	return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len,
+				   &remote_protocol_packets
+				   [PACKET_qXfer_siginfo_write]);
+    }
+
   /* Only handle flash writes.  */
   if (writebuf != NULL)
     {
@@ -9070,6 +9089,12 @@ Show the maximum size of the address (in bits) in a memory packet."), NULL,
   add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
                         "qXfer:osdata:read", "osdata", 0);
 
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
+                         "qXfer:siginfo:read", "read-siginfo-object", 0);
+
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
+                         "qXfer:siginfo:write", "write-siginfo-object", 0);
+
   add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
 			 "qGetTLSAddr", "get-thread-local-storage-address",
 			 0);