[Qemu-devel] [PATCH 4/5] linux-user: Introduce h2g_valid

[Jan Kiszka <jan.kiszka@web.de>]

Introduce h2g_valid to check if a given host address can be converted
into a valid guest address.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
---
 cpu-all.h |    4 ++++
 1 file changed, 4 insertions(+)

Index: b/cpu-all.h
===================================================================
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -674,6 +674,10 @@ static inline void stfq_be_p(void *ptr,
     assert(__ret == (target_ulong)__ret); \
     __ret; \
 })
+#define h2g_valid(x) ({ \
+    unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
+    (__guest == (target_ulong)__guest); \
+})
 
 #define saddr(x) g2h(x)
 #define laddr(x) g2h(x)