From 35df59db508dbf23437f3253f25147191796e19f Mon Sep 17 00:00:00 2001 From: Tobias Anderberg Date: Mon, 16 Sep 2002 08:08:37 +0000 Subject: Initial version of the CRIS port. --- libc/sysdeps/linux/cris/sbrk.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 libc/sysdeps/linux/cris/sbrk.c (limited to 'libc/sysdeps/linux/cris/sbrk.c') diff --git a/libc/sysdeps/linux/cris/sbrk.c b/libc/sysdeps/linux/cris/sbrk.c new file mode 100644 index 000000000..79d924a44 --- /dev/null +++ b/libc/sysdeps/linux/cris/sbrk.c @@ -0,0 +1,36 @@ +/* From libc-5.3.12 */ + +#include +#include +#include +#include "sysdep.h" + +extern void * ___brk_addr; + +extern int __init_brk (void); + +void * +sbrk(intptr_t increment) +{ + if (__init_brk () == 0) { + void * tmp = ___brk_addr + increment; + + /* Notice that we don't need to save/restore the GOT + * register since that is not call clobbered by the syscall + */ + + asm ("move.d %1,$r10\n\t" + "movu.w " STR(__NR_brk) ",$r9\n\t" + "break 13\n\t" + "move.d $r10, %0" + : "=r" (___brk_addr) + : "g" (tmp) + : "r9", "r10"); + + if (___brk_addr == tmp) + return tmp - increment; + __set_errno(ENOMEM); + return ((void *) -1); + } + return ((void *) -1); +} -- cgit v1.2.3