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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [libgloss/] [m32r/] [sbrk.c] - Blame information for rev 387

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Line No. Rev Author Line
1 148 jeremybenn
#include <sys/types.h>
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#include <sys/stat.h>
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#include "syscall.h"
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#include "eit.h"
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caddr_t
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_sbrk (int incr)
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{
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  /* `_end' is defined in the linker script.
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     We must handle it carefully as we don't want the compiler to think
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     it lives in the small data area.  Use medium model to ensure 32 bit
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     addressability.  */
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  extern char _end __attribute__ ((__model__(__medium__)));
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  static char *heap_end;
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  char *prev_heap_end;
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  char *sp = (char *)&sp;
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  if (heap_end == 0)
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    {
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      heap_end = &_end;
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    }
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  prev_heap_end = heap_end;
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  if (heap_end > sp)
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    {
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      _write (1, "Heap and stack collision\n", 25);
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#if 0 /* Calling abort brings in the signal handling code.  */
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      abort ();
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#else
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      exit (1);
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#endif
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    }
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  heap_end += incr;
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  return (caddr_t) prev_heap_end;
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}

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