From: Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
Date: Tue, 4 Sep 2012 09:21:20 +0000 (+0000)
Subject: backport: re PR target/54220 ([avr] Potential stack corruption in naked functions... 
X-Git-Tag: releases/gcc-4.6.4~385
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29ff39b4e0ac771901e472717bdd185d42e4d119;p=thirdparty%2Fgcc.git

backport: re PR target/54220 ([avr] Potential stack corruption in naked functions at -O0)

	Backport from 2012-09-04 mainline r190914
	PR target/54220
	* config/avr/avr.c (TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS): New
	define to...
	(avr_allocate_stack_slots_for_args): ...this new static function.

From-SVN: r190917
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fa648e15a9b8..a4edd5c6b4a6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2012-09-04  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	Backport from 2012-09-04 mainline r190914
+
+	PR target/54220
+	* config/avr/avr.c (TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS): New
+	define to...
+	(avr_allocate_stack_slots_for_args): ...this new static function.
+
 2012-09-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Backported from mainline
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c
index afba77909e9e..e60857980d8a 100644
--- a/gcc/config/avr/avr.c
+++ b/gcc/config/avr/avr.c
@@ -94,6 +94,7 @@ static bool avr_hard_regno_scratch_ok (unsigned int);
 static unsigned int avr_case_values_threshold (void);
 static bool avr_frame_pointer_required_p (void);
 static bool avr_can_eliminate (const int, const int);
+static bool avr_allocate_stack_slots_for_args (void);
 static bool avr_class_likely_spilled_p (reg_class_t c);
 static rtx avr_function_arg (CUMULATIVE_ARGS *, enum machine_mode,
 			     const_tree, bool);
@@ -218,6 +219,9 @@ static const struct default_options avr_option_optimization_table[] =
 #undef TARGET_CAN_ELIMINATE
 #define TARGET_CAN_ELIMINATE avr_can_eliminate
 
+#undef TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS
+#define TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS avr_allocate_stack_slots_for_args
+
 #undef TARGET_CLASS_LIKELY_SPILLED_P
 #define TARGET_CLASS_LIKELY_SPILLED_P avr_class_likely_spilled_p
 
@@ -446,6 +450,16 @@ avr_regs_to_save (HARD_REG_SET *set)
   return count;
 }
 
+
+/* Implement `TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS' */
+
+static bool
+avr_allocate_stack_slots_for_args (void)
+{
+  return !cfun->machine->is_naked;
+}
+
+
 /* Return true if register FROM can be eliminated via register TO.  */
 
 bool