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_sbrk in TI

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Sergio R. Caprile committed 2023-02-17 11:11:31 -03:00
1 parent b9424e4c21
commit b29d6b4478
1 file changed
+3
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examples/ti/ek-tm4c1294xl-baremetal/syscalls.c
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@@ -12,8 +12,11 @@ void *_sbrk(int incr) {
extern char _end; extern char _end;
static unsigned char *heap = NULL; static unsigned char *heap = NULL;
unsigned char *prev_heap; unsigned char *prev_heap;
unsigned char x = 0, *heap_end = (unsigned char *)((size_t) &x - 512);
(void) x;
if (heap == NULL) heap = (unsigned char *) &_end; if (heap == NULL) heap = (unsigned char *) &_end;
prev_heap = heap; prev_heap = heap;
if (heap + incr > heap_end) return (void *) -1;
heap += incr; heap += incr;
return prev_heap; return prev_heap;
} }