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/brk.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 libc/sysdeps/linux/cris/brk.c (limited to 'libc/sysdeps/linux/cris/brk.c') diff --git a/libc/sysdeps/linux/cris/brk.c b/libc/sysdeps/linux/cris/brk.c new file mode 100644 index 000000000..7814d52c3 --- /dev/null +++ b/libc/sysdeps/linux/cris/brk.c @@ -0,0 +1,31 @@ +#include +#include +#include +#include "sysdep.h" + +extern void * ___brk_addr; + +extern int __init_brk (void); + +int brk(void * end_data_seg) +{ + if (__init_brk () == 0) { + /* 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" (end_data_seg) + : "r9", "r10"); + + if (___brk_addr == end_data_seg) + return 0; + __set_errno(ENOMEM); + } + return -1; + +} -- cgit v1.2.3