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>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index d4ad020012..cde0b055a6 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -9,6 +9,7 @@
 #include <linux/libfdt.h>
 #include <os.h>
 #include <asm/io.h>
+#include <asm/setjmp.h>
 #include <asm/state.h>
 #include <dm/root.h>
 
@@ -164,3 +165,15 @@ ulong timer_get_boot_us(void)
 
 	return (count - base_count) / 1000;
 }
+
+int setjmp(jmp_buf jmp)
+{
+	return os_setjmp((ulong *)jmp, sizeof(*jmp));
+}
+
+void longjmp(jmp_buf jmp, int ret)
+{
+	os_longjmp((ulong *)jmp, ret);
+	while (1)
+		;
+}