[PATCH V4 4/6] Add bound related fields to the siginfo structure.

[Walfred Tedeschi <walfred dot tedeschi at intel dot com>]

New kernel and glibc patches have introduced fields in the
segmentation fault fields.  New fields will be conditional and requested
on demand by the customers.

Kernel patch:
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=ee1b58d36aa1b5a79eaba11f5c3633c88231da83

Glibc patch:
http://repo.or.cz/w/glibc.git/commit/d4358b51c26a634eb885955aea06cad26af6f696

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

gdb/ChangeLog:

	* linux-tdep.c (linux_get_siginfo_type): Add the _addr_bnd
	structure to the siginfo conditionally if extra_fields is
	LINUX_SIGINFO_FIELD_ADDR_BND.

---
 gdb/linux-tdep.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index a49057f..0e72b5b 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -251,7 +251,7 @@ 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;
+  struct type *int_type, *uint_type, *long_type, *void_ptr_type, *short_type;
   struct type *uid_type, *pid_type;
   struct type *sigval_type, *clock_type;
   struct type *siginfo_type, *sifields_type;
@@ -267,6 +267,8 @@ linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch,
 				 1, "unsigned int");
   long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
 				 0, "long");
+  short_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
+				 0, "short");
   void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
 
   /* sival_t */
@@ -344,6 +346,18 @@ linux_get_siginfo_type_with_fields (struct gdbarch *gdbarch,
   append_composite_type_field (type, "si_addr", void_ptr_type);
   append_composite_type_field (sifields_type, "_sigfault", type);
 
+  if (extra_fields == LINUX_SIGINFO_FIELD_ADDR_BND)
+    {
+      struct type *sigfault_bnd_fields;
+
+      append_composite_type_field (type, "_addr_lsb", short_type);
+      sigfault_bnd_fields = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+      append_composite_type_field (sigfault_bnd_fields, "_lower", void_ptr_type);
+      append_composite_type_field (sigfault_bnd_fields, "_upper", void_ptr_type);
+      append_composite_type_field (type, "_addr_bnd", sigfault_bnd_fields);
+      append_composite_type_field (sifields_type, "_sigfault", type);
+    }
+
   /* _sigpoll */
   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
   append_composite_type_field (type, "si_band", long_type);
-- 
2.1.4