diff options
| author | Keith Packard <keithp@keithp.com> | 2019-02-04 22:38:23 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2019-02-18 13:08:23 -0800 |
| commit | d6c3c3618a708d2a1a7948454710e6ae21c2a426 (patch) | |
| tree | 710bccaa175928f81ae71d515671e95a3821a3c9 /src/lpc/ao_arch_funcs.h | |
| parent | 63a44b9c169d042fb1a3997620477e7f00bb0918 (diff) | |
altos: Declare task stack as union of uint8_t and uint32_t
Support -Wcast-align and -Wpointer-arith while still allowing
architectures to pick whether they want an 8-bit or 32-bit stack.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/lpc/ao_arch_funcs.h')
| -rw-r--r-- | src/lpc/ao_arch_funcs.h | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/src/lpc/ao_arch_funcs.h b/src/lpc/ao_arch_funcs.h index 345108ae..1368f7e5 100644 --- a/src/lpc/ao_arch_funcs.h +++ b/src/lpc/ao_arch_funcs.h @@ -109,7 +109,7 @@ ao_arch_memory_barrier(void) { static inline void ao_arch_init_stack(struct ao_task *task, void *start) { - uint32_t *sp = (uint32_t *) (void *) (task->stack + AO_STACK_SIZE); + uint32_t *sp = &task->stack32[AO_STACK_SIZE >> 2]; uint32_t a = (uint32_t) start; int i; @@ -127,7 +127,7 @@ ao_arch_init_stack(struct ao_task *task, void *start) /* PRIMASK with interrupts enabled */ ARM_PUSH32(sp, 0); - task->sp = sp; + task->sp32 = sp; } static inline void ao_arch_save_regs(void) { @@ -146,17 +146,14 @@ static inline void ao_arch_save_regs(void) { static inline void ao_arch_save_stack(void) { uint32_t *sp; asm("mov %0,sp" : "=&r" (sp) ); - ao_cur_task->sp = (sp); - if ((uint8_t *) sp < &ao_cur_task->stack[0]) + ao_cur_task->sp32 = (sp); + if (sp < &ao_cur_task->stack32[0]) ao_panic (AO_PANIC_STACK); } static inline void ao_arch_restore_stack(void) { - uint32_t sp; - sp = (uint32_t) ao_cur_task->sp; - /* Switch stacks */ - asm("mov sp, %0" : : "r" (sp) ); + asm("mov sp, %0" : : "r" (ao_cur_task->sp32) ); /* Restore PRIMASK */ asm("pop {r0}"); |