csky: Fixup libgcc unwind error

The struct rt_sigframe is also defined in libgcc/config/csky/linux-unwind.h of gcc. Although there is no use for the first three word space, we must keep them the same with linux-unwind.h for member position. The BUG is found in glibc test with the tst-cancel02. The BUG is from commit:bf2416829362 of linux-5.2-rc1 merge window. Signed-off-by: Guo Ren <[email protected]> Signed-off-by: Mao Han <[email protected]> Cc: Arnd Bergmann <[email protected]>
modi0012 · Jun 26, 2019 · 19e5e2a · 19e5e2a
1 parent 9e0babf
commit 19e5e2a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c
@@ -39,6 +39,11 @@ static int save_fpu_state(struct sigcontext __user *sc)
 #endif
 
 struct rt_sigframe {
+	/*
+	 * pad[3] is compatible with the same struct defined in
+	 * gcc/libgcc/config/csky/linux-unwind.h
+	 */
+	int pad[3];
 	struct siginfo info;
 	struct ucontext uc;
 };