fix is_region_userspace (worked incorrectly for e.g 0xFFFFFFFF)

git-svn-id: svn://kolibrios.org@8216 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-11-17 20:00:28 +00:00 · 2020-11-17 20:00:28 +00:00 · efa84a263d
commit efa84a263d
parent 055b9d04c4
1 changed files with 5 additions and 2 deletions
--- a/kernel/trunk/kernel.asm
+++ b/kernel/trunk/kernel.asm
@ -5674,13 +5674,16 @@ is_region_userspace:
 ;      ebx = len
 ; out: eax = 1 if region in userspace memory, 0 if not
        push    esi edi ecx
+
+        cmp     eax, OS_BASE
+        ja      @f
+
        add     eax, ebx
        cmp     eax, OS_BASE
        ja      @f

        mov     eax, 1
-        jmp     .ret 
-
+        jmp     .ret
@@:
        xor     eax, eax
 .ret: