[Qemu-devel] [PATCH] linux-user: Introduce h2g_valid

["Kirill A. Shutemov" <kirill@shutemov.name>]

From: 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>
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
---
 cpu-all.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/cpu-all.h b/cpu-all.h
index 526ace2..341c38e 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -638,6 +638,10 @@ static inline void stfq_be_p(void *ptr, float64 v)
     assert(__ret == (abi_ulong)__ret); \
     (abi_ulong)__ret; \
 })
+#define h2g_valid(x) ({ \
+    unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
+    (__guest == (abi_ulong)__guest); \
+})
 
 #define saddr(x) g2h(x)
 #define laddr(x) g2h(x)
-- 
1.6.0.2.GIT