gdb: Add support for v7.11, port patches from v7.10.1 that apply

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

config/debug/gdb.in

@@ -68,6 +68,11 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config GDB_V_7_11
+    bool
+    prompt "7.11"
+    select GDB_7_2_or_later
+
 config GDB_V_7_10_1
     bool
     prompt "7.10.1"
@@ -233,6 +238,7 @@ config GDB_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "7.11" if GDB_V_7_11
     default "7.10.1" if GDB_V_7_10_1
     default "7.10" if GDB_V_7_10
     default "7.9.1" if GDB_V_7_9_1

patches/gdb/7.11/100-musl_fix.patch

@@ -0,0 +1,28 @@
+--- a/gdb/linux-nat.c
++++ b/gdb/linux-nat.c
+@@ -17,6 +17,7 @@
+    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 "stopcode.h"
+ #include "defs.h"
+ #include "inferior.h"
+ #include "infrun.h"
+@@ -73,6 +74,10 @@
+ #define SPUFS_MAGIC 0x23c9b64e
+ #endif
+
++#ifndef __SIGRTMIN
++#define __SIGRTMIN SIGRTMIN
++#endif
++
+ /* This comment documents high-level logic of this file.
+
+ Waiting for events in sync mode
+--- /dev/null
++++ b/gdb/stopcode.h
+@@ -0,0 +1,4 @@
++#ifndef W_STOPCODE
++#define W_STOPCODE(sig) ((sig) << 8 | 0x7f)
++#endif
++

patches/gdb/7.11/111-xtensa-make-sure-ar_base-is-initialized.patch

@@ -0,0 +1,35 @@
+From 208ea73d38c9c16cf983b6419f58050dbadcb6a9 Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Sun, 7 Jun 2015 22:43:49 +0300
+Subject: [PATCH 2/2] xtensa: make sure ar_base is initialized
+
+ar_base is uninitialized for cores w/o windowed registers as their
+regmap doesn't have register 0x0100.
+Check that ar_base is initialized and if not initialize it with a0_base.
+
+gdb/
+	* xtensa-tdep.c (xtensa_derive_tdep): Make sure ar_base is
+	initialized.
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+---
+ gdb/xtensa-tdep.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/gdb/xtensa-tdep.c b/gdb/xtensa-tdep.c
+index 55e7d98..41f5ec1 100644
+--- a/gdb/xtensa-tdep.c
++++ b/gdb/xtensa-tdep.c
+@@ -3175,6 +3175,9 @@ xtensa_derive_tdep (struct gdbarch_tdep *tdep)
+ 	tdep->num_regs = n;
+     }
+
++  if (tdep->ar_base == -1)
++    tdep->ar_base = tdep->a0_base;
++
+   /* Number of pseudo registers.  */
+   tdep->num_pseudo_regs = n - tdep->num_regs;
+
+-- 
+1.8.1.4
+

patches/gdb/7.11/112-WIP-end-of-prologue-detection-hack.patch

@@ -0,0 +1,31 @@
+From 7f8eacbb468575fb67db7fd1155a3aedaa91911b Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Sun, 7 Jun 2015 23:15:39 +0300
+Subject: [PATCH] WIP: *end of prologue* detection hack
+
+see
+  http://www.esp8266.com/viewtopic.php?p=18461#p18461
+  http://www.esp8266.com/viewtopic.php?p=19026#p19026
+  http://www.esp8266.com/viewtopic.php?p=19683#p19683
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+---
+ gdb/xtensa-tdep.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gdb/xtensa-tdep.c b/gdb/xtensa-tdep.c
+index 41f5ec1..6a7dba7 100644
+--- a/gdb/xtensa-tdep.c
++++ b/gdb/xtensa-tdep.c
+@@ -2410,7 +2410,7 @@ call0_analyze_prologue (struct gdbarch *gdbarch,
+   /* Find out, if we have an information about the prologue from DWARF.  */
+   prologue_sal = find_pc_line (start, 0);
+   if (prologue_sal.line != 0) /* Found debug info.  */
+-    body_pc = prologue_sal.end;
++    body_pc = prologue_sal.end + 40;
+
+   /* If we are going to analyze the prologue in general without knowing about
+      the current PC, make the best assumtion for the end of the prologue.  */
+-- 
+1.8.1.4
+