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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [sys/] [sysmec/] [sbrk.c] - Rev 1775
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#include <_ansi.h> #include <sys/types.h> #include <sys/stat.h> #include "sys/syscall.h" int errno; int __trap0 (); #define TRAP0(f, p1, p2, p3) __trap0(f, (p1), (p2), (p3)) caddr_t _sbrk (size_t incr) { extern char end; /* Defined by the linker */ static char *heap_end; char *prev_heap_end; #if 0 char *sp = (char *)stack_ptr; #else char *sp = (char *)&sp; #endif if (heap_end == 0) { heap_end = &end; } prev_heap_end = heap_end; if (heap_end + incr > sp) { _write (1, "Heap and stack collision\n", 25); abort (); } heap_end += incr; return (caddr_t) prev_heap_end; }
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