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[libcpu/arm] fix race condition with ldrex,strex (#7842)

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Signed-off-by: Shell <smokewood@qq.com>
This commit is contained in:
Shell
2023-07-25 14:07:44 +08:00
committed by GitHub
parent 0a6aaf12ad
commit acfa74f078
6 changed files with 23 additions and 15 deletions
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components/lwp/arch/arm/cortex-a/lwp_arch.c
+6 -3
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@@ -54,10 +54,13 @@ static struct rt_varea kuser_varea;
void arch_kuser_init(rt_aspace_t aspace, void *vectors)
{
const size_t kuser_size = 0x1000;
int err;
extern char *__kuser_helper_start, *__kuser_helper_end;
int kuser_sz = __kuser_helper_end - __kuser_helper_start;
const size_t kuser_size = 0x1000;
extern char __kuser_helper_start[];
extern char __kuser_helper_end[];
rt_base_t start = (rt_base_t)__kuser_helper_start;
rt_base_t end = (rt_base_t)__kuser_helper_end;
int kuser_sz = end - start;
err = rt_aspace_map_static(aspace, &kuser_varea, &vectors, kuser_size,
MMU_MAP_U_RO, MMF_MAP_FIXED | MMF_PREFETCH,