From 4821702fb49c72216c307341dc3dfd5a3984cf83 Mon Sep 17 00:00:00 2001
From: bellard <bellard>
Date: Thu, 14 Apr 2005 23:49:21 +0000
Subject: win32 merge

---
 win32/lib/chkstk.S | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 win32/lib/chkstk.S

(limited to 'win32/lib/chkstk.S')

diff --git a/win32/lib/chkstk.S b/win32/lib/chkstk.S
new file mode 100644
index 0000000..8e16d74
--- /dev/null
+++ b/win32/lib/chkstk.S
@@ -0,0 +1,29 @@
+// =================================================
+// chkstk.s
+
+.text
+.globl __chkstk
+
+__chkstk:
+	xchg    (%esp), %ebp   // store ebp, get ret.addr
+	push    %ebp           // push ret.addr
+	lea     4(%esp), %ebp  // setup frame ptr
+	push    %ecx           // save ecx
+	mov     %ebp, %ecx
+P0:
+	sub     $4096,%ecx
+	test    %eax,(%ecx)
+	sub     $4096,%eax
+	cmp     $4096,%eax
+	jge     P0
+
+	sub     %eax,%ecx
+	mov     %esp,%eax
+	test    %eax,(%ecx)
+	mov     %ecx,%esp
+
+	mov     (%eax),%ecx     // restore ecx
+	mov     4(%eax),%eax
+	push    %eax
+	ret
+
-- 
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