Last change
on this file since 499 was
444,
checked in by satin@…, 7 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.1 KB
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Rev | Line | |
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[444] | 1 | /* Copyright (c) 2013 Red Hat, Inc. All rights reserved. |
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| 2 | |
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| 3 | This copyrighted material is made available to anyone wishing to use, modify, |
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| 4 | copy, or redistribute it subject to the terms and conditions of the BSD |
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| 5 | License. This program is distributed in the hope that it will be useful, |
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| 6 | but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties |
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| 7 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of this license |
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| 8 | is available at http://www.opensource.org/licenses. Any Red Hat trademarks that |
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| 9 | are incorporated in the source code or documentation are not subject to the BSD |
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| 10 | License and may only be used or replicated with the express permission of |
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| 11 | Red Hat, Inc. |
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| 12 | */ |
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| 13 | |
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| 14 | char * |
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| 15 | _sbrk (int adj) |
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| 16 | { |
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| 17 | extern char end[]; /* Defined in the linker script. */ |
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| 18 | static char * heap = end; |
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| 19 | char * rv = heap; |
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| 20 | char * sp = (char *) & sp; /* Stack grows down, heap grows up... */ |
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| 21 | |
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| 22 | if (heap + adj > sp) |
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| 23 | { |
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| 24 | #define MESSAGE "Heap and stack collision\n" |
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| 25 | write (1, MESSAGE, sizeof MESSAGE); |
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| 26 | abort (); |
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| 27 | } |
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| 28 | |
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| 29 | heap += adj; |
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| 30 | return rv; |
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| 31 | } |
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| 32 | |
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| 33 | char * sbrk (int) __attribute__((weak, alias ("_sbrk"))); |
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