aarch64: add extra_context struct from linux v4.13
allows expanding the signal frame beyond the 4k reserved space.
new in linux commit 33f082614c3443d937f50fe936f284f62bbb4a1b
diff --git a/arch/aarch64/bits/signal.h b/arch/aarch64/bits/signal.h
index 00fb5f3..5eb3d91 100644
--- a/arch/aarch64/bits/signal.h
+++ b/arch/aarch64/bits/signal.h
@@ -24,6 +24,7 @@
#define FPSIMD_MAGIC 0x46508001
#define ESR_MAGIC 0x45535201
+#define EXTRA_MAGIC 0x45585401
struct _aarch64_ctx {
unsigned int magic;
unsigned int size;
@@ -38,6 +39,12 @@
struct _aarch64_ctx head;
unsigned long esr;
};
+struct extra_context {
+ struct _aarch64_ctx head;
+ unsigned long datap;
+ unsigned int size;
+ unsigned int __reserved[3];
+};
#else
typedef struct {
long double __regs[18+256];