76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
#if (defined(__ICCARM__))
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#elif defined(__ARMCC_VERSION)
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#elif defined __GNUC__
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#include "sys/types.h"
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#include "sys/stat.h"
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#endif
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static uint32_t s_u32Current_heap_end;
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#if (defined(__ICCARM__))
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extern uint32_t __HeapBegin[1]; // Defined by the linker.
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extern uint32_t __HeapLimit[1]; // Defined by the linker.
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#elif defined __GNUC__
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extern uint32_t __HeapBegin[1]; // Defined by the linker.
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extern uint32_t __HeapLimit[1]; // Defined by the linker.
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#endif
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#if (defined(__ICCARM__))
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/**
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* TODO: something can be done to make sure the start address used in heap is defined heap start
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*/
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#elif defined(__ARMCC_VERSION)
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#elif defined __GNUC__
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extern caddr_t _sbrk(int incr);
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/**
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* \brief Replacement of C library of _sbrk
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*/
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caddr_t _sbrk(int incr)
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{
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if (s_u32Current_heap_end == 0U)
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{
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#if (defined(__ICCARM__))
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s_u32Current_heap_end = (uint32_t)__HeapBegin;
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#elif defined __GNUC__
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s_u32Current_heap_end = (uint32_t)__HeapBegin;
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#endif
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}
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// Need to align heap to word boundary, else will get
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// hard faults on Cortex-M0. So we assume that heap starts on
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// word boundary, hence make sure we always add a multiple of
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// 4 to it.
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incr = (incr + 3) & (~3); // align value to 4
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#if (defined(__ICCARM__))
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if ( (s_u32Current_heap_end + incr) > (uint32_t)__HeapLimit )
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#elif defined __GNUC__
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if ( (s_u32Current_heap_end + incr) > (uint32_t)__HeapLimit )
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#endif
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{
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// Some of the libstdc++-v3 tests rely upon detecting
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// out of memory errors, so do not abort here.
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#if 0
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extern void abort(void);
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_write(1, "_sbrk: Heap and stack collision\n", 32);
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abort();
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#else
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return (caddr_t) - 1;
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#endif
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}
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else
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{
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s_u32Current_heap_end+= incr;
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}
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return (caddr_t) s_u32Current_heap_end;
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}
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#endif
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