sandbox: Add a setjmp() implementation
Add an implementation of setjmp() and longjmp() which rely on the
underlying host C library. Since we cannot know how large the jump buffer
needs to be, pick something that should be suitable and check it at
runtime. At present we need access to the underlying struct as well.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index d76d021..5839932 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -7,6 +7,7 @@
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
+#include <setjmp.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
@@ -628,3 +629,25 @@
rt->tm_yday = tm->tm_yday;
rt->tm_isdst = tm->tm_isdst;
}
+
+int os_setjmp(ulong *jmp, int size)
+{
+ jmp_buf dummy;
+
+ /*
+ * We cannot rely on the struct name that jmp_buf uses, so use a
+ * local variable here
+ */
+ if (size < sizeof(dummy)) {
+ printf("setjmp: jmpbuf is too small (%d bytes, need %d)\n",
+ size, sizeof(jmp_buf));
+ return -ENOSPC;
+ }
+
+ return setjmp((struct __jmp_buf_tag *)jmp);
+}
+
+void os_longjmp(ulong *jmp, int ret)
+{
+ longjmp((struct __jmp_buf_tag *)jmp, ret);
+}