d1fc77322f
* configure.in: Add rl78. * configure: Regenerate. * rl78: New directory [newlib] * configure.host: Add rl78. * libc/include/machine/ieeefp.h: Add rl78 support. * libc/include/machine/setjmp.h: Add rl78 support. * libc/machine/configure.in: Add rl78. * libc/machine/rl78: New directory.
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/*
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Copyright (c) 2005, 2009 Red Hat Incorporated.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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char *
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_sbrk (int adj)
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{
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extern char end;
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static char * heap = & end;
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char * rv = heap;
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char * heaptop = (char *) &adj;
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heap += adj;
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/* The allocated chunk spans our stack? */
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if (rv < heaptop && heap > heaptop
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/* The allocated chunk spans our address space? */
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|| heap < rv)
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{
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errno = ENOMEM;
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return (char *) -1;
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}
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return rv;
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}
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char * sbrk (int) __attribute__((weak, alias ("_sbrk")));
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