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Diffstat (limited to 'libc/sysdeps/linux/cris/brk.c')
-rw-r--r--libc/sysdeps/linux/cris/brk.c31
1 files changed, 31 insertions, 0 deletions
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 <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+#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;
+
+}