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, 6 insertions, 0 deletions

diff --git a/gdb/value.h b/gdb/value.h
index 0c85223..aa43365 100644
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -305,11 +305,14 @@ extern struct value *coerce_array (struct value *value);
 /* Internal variables (variables for convenience of use of debugger)
    are recorded as a chain of these structures.  */
 
+typedef struct value * (*internalvar_make_value) (struct internalvar *);
+
 struct internalvar
 {
   struct internalvar *next;
   char *name;
   struct value *value;
+  internalvar_make_value make_value;
   int endian;
 };
 
@@ -534,6 +537,9 @@ extern struct internalvar *lookup_only_internalvar (char *name);
 
 extern struct internalvar *create_internalvar (char *name);
 
+extern struct internalvar *
+  create_internalvar_type_lazy (char *name, internalvar_make_value fun);
+
 extern struct internalvar *lookup_internalvar (char *name);
 
 extern int value_equal (struct value *arg1, struct value *arg2);