commit 879002e8baae11cd71aae1bd45ea9c08ea500657
Author: Brandon Bergren <git@bdragon.rtk0.net>
Date:   Sat Mar 14 11:49:18 2020 -0500

    Fix overflow parameters on makecontext().
    
    Reported By: pherde

diff --git a/lib/libc/powerpc64/gen/makecontext.c b/lib/libc/powerpc64/gen/makecontext.c
index c21e9140d38f..7663b6f82e7d 100644
--- a/lib/libc/powerpc64/gen/makecontext.c
+++ b/lib/libc/powerpc64/gen/makecontext.c
@@ -102,7 +102,11 @@ __makecontext(ucontext_t *ucp, void (*start)(void), int argc, ...)
 		uint64_t *argp;
 
 		/* Skip past frame pointer and saved LR */
+#if !defined(_CALL_ELF) || _CALL_ELF == 1
 		argp = (uint64_t *)sp + 6;
+#else
+		argp = (uint64_t *)sp + 4;
+#endif
 
 		for (i = 0; i < stackargs; i++)
 			*argp++ = va_arg(ap, uint64_t);