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baremetal: fix heap and stack position in preparation for CLI arguments

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Ciro Santilli 六四事件 法轮功
2020-04-01 02:00:01 +00:00
parent 6bb20c0386
commit e25e79c26b
9 changed files with 58 additions and 11 deletions
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8
baremetal/lib/syscalls.c
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@@ -12,8 +12,8 @@ enum {
UART_FR_RXFE = 0x10,
};
extern char heap_low;
extern char heap_top;
extern char lkmc_heap_low;
extern char lkmc_heap_top;
char *heap_end = 0;
@@ -90,10 +90,10 @@ _CLOCK_T_ _times_r (struct _reent *r, struct tms *ptms) {
caddr_t _sbrk(int incr) {
char *prev_heap_end;
if (heap_end == 0) {
heap_end = &heap_low;
heap_end = &lkmc_heap_low;
}
prev_heap_end = heap_end;
if (heap_end + incr > &heap_top) {
if (heap_end + incr > &lkmc_heap_top) {
/* Heap and stack collision */
return (caddr_t)0;
}