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dpgeorgedpgeorge
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stmhal: Make pendsv variable non-static so gcc-5 doesn't opt it away.
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Lines changed: 6 additions & 4 deletions

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‎stmhal/pendsv.c‎

Lines changed: 6 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -31,10 +31,12 @@
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#include "py/runtime.h"
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#include "pendsv.h"
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// Note: this can contain point to the heap but is not traced by GC.
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// This is okay because we only ever set it to mp_const_vcp_interrupt
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// which is in the root-pointer set.
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STATIC void *pendsv_object;
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// This variable is used to save the exception object between a ctrl-C and the
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// PENDSV call that actually raises the exception. It must be non-static
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// otherwise gcc-5 optimises it away. It can point to the heap but is not
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// traced by GC. This is okay because we only ever set it to
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// mp_const_vcp_interrupt which is in the root-pointer set.
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void *pendsv_object;
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void pendsv_init(void) {
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// set PendSV interrupt at lowest priority

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