Changeset 9754 for trunk/src/kernel32/exceptutil.asm

Timestamp:

Feb 5, 2003, 3:04:33 PM (23 years ago)

Author:

sandervl

Message:

Check ESP when calling the entrypoint of a newly created thread.

File:

• trunk/src/kernel32/exceptutil.asm (modified) (2 diffs)

trunk/src/kernel32/exceptutil.asm

@@ -1 @@
-; $Id: exceptutil.asm,v 1.21 2002-11-29 09:30:55 sandervl Exp $
+; $Id: exceptutil.asm,v 1.22 2003-02-05 14:04:33 sandervl Exp $
 
 ;/*
@@ -159 +159 @@
         push    ebp
         mov     ebp, esp
+
+;We're asking for problems if our stack start near a 64kb boundary
+;Some OS/2 thunking procedures can choke on misaligned stack addresses
+        mov     eax, esp
+        and     eax, 0FFFFh
+        cmp     eax, 0E000h
+        jge     @goodthreadstack
+
+        ;set ESP to the top of the next 64kb block
+        add     eax, 16
+        sub     esp, eax
+@goodthreadstack:
 
         push    dword ptr [ebp+12]