[PATCH V4 2/6] Prepararion for new siginfo on Linux.

[Walfred Tedeschi <walfred.tedeschi@intel.com>]

First add new structure and function to allow architecture customization
for the siginfo structure.

2016-01-15  Walfred Tedeschi  <walfred.tedeschi@intel.com>

gdb/ChangeLog:

	* linux-tdep.h (linux_siginfo_extra_field_values): New enum values.
	(linux_siginfo_extra_fields): New enum type.
	* linux-tdep.c (linux_get_siginfo_type_with_fields): New function.
	(linux_get_siginfo_type): Use new function.

---
 gdb/linux-tdep.c | 16 +++++++++++++---
 gdb/linux-tdep.h | 10 ++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index 29f5f3c..48bed11 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -243,11 +243,12 @@ get_linux_inferior_data (void)
   return info;
 }
 
-/* This function is suitable for architectures that don't
-   extend/override the standard siginfo structure.  */
+/* This function is suitable for architectures that
+   extend/override the standard siginfo in an specific way.  */
 
 static struct type *
-linux_get_siginfo_type (struct gdbarch *gdbarch)
+linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch,
+				    linux_siginfo_extra_fields extra_fields)
 {
   struct linux_gdbarch_data *linux_gdbarch_data;
   struct type *int_type, *uint_type, *long_type, *void_ptr_type;
@@ -364,6 +365,15 @@ linux_get_siginfo_type (struct gdbarch *gdbarch)
   return siginfo_type;
 }
 
+/* This function is suitable for architectures that don't
+   extend/override the standard siginfo structure.  */
+
+static struct type *
+linux_get_siginfo_type (struct gdbarch *gdbarch)
+{
+  return linux_get_siginfo_type_with_fields (gdbarch, 0);
+}
+
 /* Return true if the target is running on uClinux instead of normal
    Linux kernel.  */
 
diff --git a/gdb/linux-tdep.h b/gdb/linux-tdep.h
index 328c7f0..98a17fa 100644
--- a/gdb/linux-tdep.h
+++ b/gdb/linux-tdep.h
@@ -24,6 +24,16 @@
 
 struct regcache;
 
+/* Enum used to define which kind of siginfo is used by the architecture.  */
+enum linux_siginfo_extra_field_values
+{
+  /* Add bound fields into the segmentation fault fields.  */
+  LINUX_SIGINFO_FIELD_ADDR_BND = 1
+};
+
+/* Defines a type for the values defined in linux_siginfo_extra_field_values.  */
+DEF_ENUM_FLAGS_TYPE (enum linux_siginfo_extra_field_values, linux_siginfo_extra_fields);
+
 typedef char *(*linux_collect_thread_registers_ftype) (const struct regcache *,
 						       ptid_t,
 						       bfd *, char *, int *,
-- 
2.1.4