[PATCH v2 3/7] Implement breakpoint_from_kind for supported architectures in GDBServer.

[Antoine Tremblay <antoine dot tremblay at ericsson dot com>]

This patch implements the breakpoint_from_kind linux_target_ops for
architectures that support software breakpoints, namely : x86 and aarch64.

No regressions, tested on Ubuntu 14.04 x86.
With gdbserver-{native,extended}.

Compilation was also tested on aarch64.
---
 gdb/gdbserver/linux-aarch64-low.c | 9 +++++++++
 gdb/gdbserver/linux-x86-low.c     | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c
index 1e7a0ff..46b79a5 100644
--- a/gdb/gdbserver/linux-aarch64-low.c
+++ b/gdb/gdbserver/linux-aarch64-low.c
@@ -3238,6 +3238,14 @@ aarch64_supports_range_stepping (void)
   return 1;
 }
 
+/* Implementation of linux_target_ops method "breakpoint_from_kind".  */
+
+static const unsigned char *
+aarch64_breakpoint_from_kind (int *kind)
+{
+    return (const unsigned char *) &aarch64_breakpoint;
+}
+
 struct linux_target_ops the_low_target =
 {
   aarch64_arch_setup,
@@ -3270,6 +3278,7 @@ struct linux_target_ops the_low_target =
   aarch64_emit_ops,
   aarch64_get_min_fast_tracepoint_insn_len,
   aarch64_supports_range_stepping,
+  aarch64_breakpoint_from_kind,
 };
 
 void
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c
index 41803c4..e64b498 100644
--- a/gdb/gdbserver/linux-x86-low.c
+++ b/gdb/gdbserver/linux-x86-low.c
@@ -3258,6 +3258,14 @@ x86_supports_range_stepping (void)
   return 1;
 }
 
+/* Implementation of linux_target_ops method "breakpoint_from_kind".  */
+
+static const unsigned char *
+x86_breakpoint_from_kind (int *kind)
+{
+  return x86_breakpoint;
+}
+
 /* This is initialized assuming an amd64 target.
    x86_arch_setup will correct it for i386 or amd64 targets.  */
 
@@ -3297,6 +3305,7 @@ struct linux_target_ops the_low_target =
   x86_emit_ops,
   x86_get_min_fast_tracepoint_insn_len,
   x86_supports_range_stepping,
+  x86_breakpoint_from_kind,
 };
 
 void
-- 
1.9.1