From: Keith Packard <keithp@keithp.com>
Date: Wed, 12 Sep 2018 01:46:52 +0000 (-0700)
Subject: altos/stm32f4: Align stack to 8 bytes
X-Git-Tag: 1.9~27^2~29
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=23075d174d2bff8ff3f3deef3c3d90b83da6bd2e

altos/stm32f4: Align stack to 8 bytes

This makes sure that doubles are aligned properly when passed on the stack.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/kernel/ao_task.h b/src/kernel/ao_task.h
index f3789fa2..709e10c6 100644
--- a/src/kernel/ao_task.h
+++ b/src/kernel/ao_task.h
@@ -27,14 +27,12 @@
 #endif
 
 /* arm stacks must be 32-bit aligned */
+#ifndef AO_STACK_ALIGNMENT
 #ifdef __arm__
 #define AO_STACK_ALIGNMENT __attribute__ ((aligned(4)))
-#endif
-#ifdef SDCC
+#else
 #define AO_STACK_ALIGNMENT
 #endif
-#ifdef __AVR__
-#define AO_STACK_ALIGNMENT
 #endif
 
 /* An AltOS task */
diff --git a/src/stm32f4/ao_arch.h b/src/stm32f4/ao_arch.h
index 73eb793f..d4c78f60 100644
--- a/src/stm32f4/ao_arch.h
+++ b/src/stm32f4/ao_arch.h
@@ -19,9 +19,11 @@
 #include <stm32f4.h>
 
 #ifndef AO_STACK_SIZE
-#define AO_STACK_SIZE	512
+#define AO_STACK_SIZE	1024
 #endif
 
+#define AO_STACK_ALIGNMENT __attribute__ ((aligned(8)))
+
 #define AO_PORT_TYPE	uint16_t
 
 #define ao_arch_nop()		asm("nop")