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py/asmarm: Use __clear_cache on Linux/GCC when creating new asm code. 

Comes from https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/caches-and-self-modifying-code

This fixes a crash when running MicroPython using qemu-arm.
This commit is contained in:
David Lechner 2019-06-27 13:36:15 -05:00 committed by Damien George
parent 08075beeb9
commit 62b00dd5d8
1 changed files with 5 additions and 1 deletions
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6
py/asmarm.c
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@ -40,7 +40,11 @@
void asm_arm_end_pass(asm_arm_t *as) { void asm_arm_end_pass(asm_arm_t *as) {
if (as->base.pass == MP_ASM_PASS_EMIT) { if (as->base.pass == MP_ASM_PASS_EMIT) {
#ifdef __arm__ #if defined(__linux__) && defined(__GNUC__)
char *start = mp_asm_base_get_code(&as->base);
char *end = start + mp_asm_base_get_code_size(&as->base);
__clear_cache(start, end);
#elif defined(__arm__)
// flush I- and D-cache // flush I- and D-cache
asm volatile( asm volatile(
"0:" "0:"