Add greg_t for arm64.
This was already present for the other architectures. I think we skipped
this because glibc seems to have an incorrect definition (int rather than
long), but the kernel has the sane definition (just not in a uapi header).
Change-Id: I0d47a424b505804389853dd8632693dad55a3907
diff --git a/libc/include/sys/ucontext.h b/libc/include/sys/ucontext.h
index b8d4d58..dd2a0bb 100644
--- a/libc/include/sys/ucontext.h
+++ b/libc/include/sys/ucontext.h
@@ -78,6 +78,10 @@
#elif defined(__aarch64__)
+#define NGREG 34 /* x0..x30 + sp + pc + pstate */
+typedef unsigned long greg_t;
+typedef greg_t gregset_t[NGREG];
+
#include <asm/sigcontext.h>
typedef struct sigcontext mcontext_t;
