diff options
author | Nathan Sidwell <nathan@codesourcery.com> | 2006-09-15 17:24:03 +0400 |
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committer | Nathan Sidwell <nathan@codesourcery.com> | 2006-09-15 17:24:03 +0400 |
commit | 5f87f7b44d1fd4819577a6fe2beec305990d09d9 (patch) | |
tree | 4b77a23f7c68abce214cdaffd60cbdfa768c40ca | |
parent | 11d4e97923c1d24d5342acea8cb6b392a1229ee2 (diff) |
libgloss/
* m68k/Makefile.in (BDM_OTHER_OBJS): Remove sbrk.o.
(BDM_SYSOBJS): Add bdm-sbrk.o.
* m68k/bdm-sbrk.c: New.
-rw-r--r-- | ChangeLog.csl | 7 | ||||
-rw-r--r-- | libgloss/m68k/bdm-sbrk.c | 49 |
2 files changed, 56 insertions, 0 deletions
diff --git a/ChangeLog.csl b/ChangeLog.csl index 9ce5ed6b5..6fe9d6c2d 100644 --- a/ChangeLog.csl +++ b/ChangeLog.csl @@ -1,3 +1,10 @@ +2006-09-15 Nathan Sidwell <nathan@codesourcery.com> + + libgloss/ + * m68k/Makefile.in (BDM_OTHER_OBJS): Remove sbrk.o. + (BDM_SYSOBJS): Add bdm-sbrk.o. + * m68k/bdm-sbrk.c: New. + 2006-09-11 Paul Brook <paul@codesourcery.com> libgloss/ diff --git a/libgloss/m68k/bdm-sbrk.c b/libgloss/m68k/bdm-sbrk.c new file mode 100644 index 000000000..b1d539d46 --- /dev/null +++ b/libgloss/m68k/bdm-sbrk.c @@ -0,0 +1,49 @@ +/* + * bdm-open.c -- + * + * Copyright (c) 2006 CodeSourcery Inc + * + * 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> +/* + * sbrk -- changes heap size size. Get nbytes more + * RAM. We just increment a pointer in what's + * left of memory on the board. + */ + +extern char __end[] __attribute__ ((aligned (4))); +/* Optional explicit end of heap. */ +extern char __heap_end[] __attribute__ ((aligned (4), weak)); + +void * +sbrk (int nbytes) +{ + static char *heap = __end; + char *end = __heap_end; + char *base = heap; + char *new_heap = heap + nbytes; + + if (!end) + { + /* Use sp - 256 as the heap limit. */ + __asm__ __volatile__ ("move.l %/sp,%0" : "=r"(end)); + end -= 256; + } + if (nbytes < 0 || (long)(end - new_heap) < 0) + { + errno = ENOMEM; + return (void *)-1; + } + heap = new_heap; + return base; +} |