suppressed page_unprotect_range() - fixed access_ok()

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3641 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 5 insertions, 4 deletions

diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 581ee27fa..5917cb51a 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -207,8 +207,11 @@ int target_msync(abi_ulong start, abi_ulong len, int flags);
 #define VERIFY_READ 0
 #define VERIFY_WRITE 1 /* implies read access */
 
-#define access_ok(type,addr,size) \
-    (page_check_range((target_ulong)addr,size,(type==VERIFY_READ)?PAGE_READ:PAGE_WRITE)==0)
+static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
+{
+    return page_check_range((target_ulong)addr, size,
+                            (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
+}
 
 /* NOTE __get_user and __put_user use host pointers and don't check access. */
 /* These are usually used to access struct data members once the
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 6c8f689ae..1e4ad96b3 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2773,7 +2773,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         ret = 0; /* avoid warning */
         break;
     case TARGET_NR_read:
-        page_unprotect_range(arg2, arg3);
         if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
             goto efault;
         ret = get_errno(read(arg1, p, arg3));
@@ -4537,7 +4536,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         break;
 #ifdef TARGET_NR_pread
     case TARGET_NR_pread:
-        page_unprotect_range(arg2, arg3);
         if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
             goto efault;
         ret = get_errno(pread(arg1, p, arg3, arg4));