Added clobbers

2 files changed, 16 insertions, 2 deletions

diff --git a/include/cpu.h b/include/cpu.h
index c93b3b5..eb2cdc0 100644
--- a/include/cpu.h
+++ b/include/cpu.h
@@ -24,6 +24,20 @@ static inline void setmode(unsigned long mode)
 	asm volatile ("msr cpsr_c, %0" :: "r"(mode));
 }
 
+static inline void* getsysstack(void)
+{
+	void* sp;
+	asm volatile (
+	"mrs r0, cpsr\n"
+	"bic r1, r0, #0x1F\n"
+	"orr r1, r1, #0x1F\n"
+	"msr cpsr_c, r1\n"
+	"mov %0, sp\n"
+	"msr cpsr_c, r0"
+	: "=r"(sp));
+	return sp;
+}
+
 static inline void* getsvcstack(void)
 {
 	void* sp;
diff --git a/include/cpu/atomic/swap.h b/include/cpu/atomic/swap.h
index cbed62c..32717fb 100644
--- a/include/cpu/atomic/swap.h
+++ b/include/cpu/atomic/swap.h
@@ -22,7 +22,7 @@ static inline void atm_lock(unsigned long pid, unsigned long* addr)
 "	dmb"
 	: "=&r" (current_lock_value), "=&r" (tmp)
 	: "r" (pid), "r" (addr)
-	: "cc");
+	: "cc", "memory");
 }
 
 static inline void atm_release(unsigned long* addr)
@@ -34,7 +34,7 @@ static inline void atm_release(unsigned long* addr)
 "	dsb\n"
 "	sev"
 	:: "r" (cleared), "r" (addr)
-	: "cc");
+	: "cc", "memory");
 }
 
 #endif