Add sbrk and friends

Fix bug in setjmp (jmpbuf changed size)

1 files changed, 25 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sh/sbrk.c b/libc/sysdeps/linux/sh/sbrk.c
new file mode 100644
index 000000000..3dd5a46f0
--- /dev/null
+++ b/libc/sysdeps/linux/sh/sbrk.c
@@ -0,0 +1,25 @@
+/* From libc-5.3.12 */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+extern void * ___brk_addr;
+
+extern int __init_brk (void);
+extern void *_brk(void *ptr);
+
+void *
+sbrk(intptr_t increment)
+{
+    if (__init_brk () == 0)
+    {
+		void * tmp = ___brk_addr+increment;
+		___brk_addr = _brk(tmp);
+		if (___brk_addr == tmp)
+			return tmp-increment;
+		__set_errno(ENOMEM);
+		return ((void *) -1);
+    }
+    return ((void *) -1);
+}