diff options
| author | Keith Packard <keithp@keithp.com> | 2019-03-18 17:15:16 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2019-03-18 17:15:16 -0700 |
| commit | a2df970fca0e719e4b32e1642803590ff7bbd1ee (patch) | |
| tree | d38386781467433325c4ae163f45d9e55f6b9109 /src | |
| parent | b7de266431ee7bf05ba68ccae3e43a0468045860 (diff) | |
altos: ARM ABI requires 8-byte aligned stack
This makes doubles on the stack (as for var-args functions) work
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/kernel/ao_task.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/kernel/ao_task.h b/src/kernel/ao_task.h index d27ef060..03b62969 100644 --- a/src/kernel/ao_task.h +++ b/src/kernel/ao_task.h @@ -26,10 +26,10 @@ #define HAS_TASK_INFO 1 #endif -/* arm stacks must be 32-bit aligned */ +/* arm stacks must be 64-bit aligned */ #ifndef AO_STACK_ALIGNMENT #ifdef __arm__ -#define AO_STACK_ALIGNMENT __attribute__ ((aligned(4))) +#define AO_STACK_ALIGNMENT __attribute__ ((aligned(8))) #else #define AO_STACK_ALIGNMENT #endif @@ -50,11 +50,11 @@ struct ao_task { struct ao_list queue; struct ao_list alarm_queue; #endif - /* Provide both 32-bit and 8-bit stacks, always 32-bit aligned */ + /* Provide both 32-bit and 8-bit stacks */ union { uint32_t stack32[AO_STACK_SIZE>>2]; uint8_t stack8[AO_STACK_SIZE]; - }; + } AO_STACK_ALIGNMENT; #if HAS_SAMPLE_PROFILE uint32_t ticks; uint32_t yields; |