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Use returns_twice attribute to preserve regs in nlrthumb nlr_push() #7368

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Merged
merged 1 commit into from
Dec 21, 2022
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Use returns_twice attribute to preserve regs in nlrthumb nlr_push() #7368

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2 changes: 1 addition & 1 deletion py/nlrthumb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@
// For reference, arm/thumb callee save regs are:
// r4-r11, r13=sp

__attribute__((naked)) unsigned int nlr_push(nlr_buf_t *nlr) {
__attribute__((naked, returns_twice)) unsigned int nlr_push(nlr_buf_t *nlr) {

__asm volatile (
"str r4, [r0, #12] \n" // store r4 into nlr_buf
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