diff options
author | Christopher Faylor <me+cygwin@cgf.cx> | 2000-02-17 19:39:46 +0000 |
---|---|---|
committer | Christopher Faylor <me+cygwin@cgf.cx> | 2000-02-17 19:39:46 +0000 |
commit | 43b55bace5fad27af5da7a99784667363b92c45d (patch) | |
tree | 17fe82f6ba0d93b76d10dd73d4945ab81b69db40 /newlib/libc/sys/sysmec/sbrk.c | |
parent | 8dabd7496a9eeaca2a7180c0a176059ba9229bb2 (diff) | |
download | gdb-SNAPSHOT.tar.gz |
import newlib-2000-02-17 snapshotnewlib-2000-02-17SNAPSHOT
Diffstat (limited to 'newlib/libc/sys/sysmec/sbrk.c')
-rw-r--r-- | newlib/libc/sys/sysmec/sbrk.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/newlib/libc/sys/sysmec/sbrk.c b/newlib/libc/sys/sysmec/sbrk.c new file mode 100644 index 00000000000..80cb431f615 --- /dev/null +++ b/newlib/libc/sys/sysmec/sbrk.c @@ -0,0 +1,36 @@ +#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; +} |