diff options
Diffstat (limited to 'libgloss/ft32/sbrk.c')
-rw-r--r-- | libgloss/ft32/sbrk.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libgloss/ft32/sbrk.c b/libgloss/ft32/sbrk.c new file mode 100644 index 0000000..8e6743e --- /dev/null +++ b/libgloss/ft32/sbrk.c @@ -0,0 +1,45 @@ +/* sbrk.c -- allocate memory dynamically. + * + * + * Copyright (C) 2015 FTDI (support@ftdichip.com) + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ +#include <errno.h> +#include "glue.h" + +char *__heap_ptr = (char *)&_end; + +/* + * sbrk -- changes heap size size. Get nbytes more + * RAM. We just increment a pointer in what's + * left of memory on the board. + */ +char * +_sbrk (nbytes) + int nbytes; +{ + char *base; + char *sp; + char canary; + + if ((__heap_ptr + nbytes) < (&canary - 2000)) + { + base = __heap_ptr; + __heap_ptr += nbytes; + return base; + } + else + { + errno = ENOMEM; + return ((char *)-1); + } +} |