1 files changed, 75 insertions, 0 deletions
diff --git a/asm/task.s b/asm/task.s
new file mode 100644
index 0000000..7611d4a
--- /dev/null
+++ b/asm/task.s
@@ -0,0 +1,75 @@
+.global task_pusha
+task_pusha:
+
+    pushf
+
+    push $0x8
+    push $userfunc
+
+    pusha
+	/*
+	now stack looks like:
+
+	param			 // esp+48
+	returnaddy		
+
+	eflags			
+	code segment		
+	userfunc		
+
+	eax // rest by popa	
+	ecx			
+	edx			
+	ebx			
+	esp			
+	ebp			
+	esi			
+	edi			
+
+	*/
+
+    mov 48(%esp),%eax // get address of alternative stack where we want to simulate the pusha
+
+    mov (%esp),%ecx
+    mov %ecx,(%eax)
+
+    mov 4(%esp),%ecx
+    mov %ecx,4(%eax)
+
+    mov 8(%esp),%ecx
+    mov %ecx,8(%eax)
+
+    mov 12(%esp),%ecx
+    mov %ecx,12(%eax)
+
+    mov 16(%esp),%ecx
+    mov %ecx,16(%eax)
+
+    mov 20(%esp),%ecx
+    mov %ecx,20(%eax)
+
+    mov 24(%esp),%ecx
+    mov %ecx,24(%eax)
+
+    mov 28(%esp),%ecx
+    mov %ecx,28(%eax)
+
+    mov 32(%esp),%ecx
+    mov %ecx,32(%eax)
+
+    mov 36(%esp),%ecx
+    mov %ecx,36(%eax)
+
+    mov 40(%esp),%ecx
+    mov %ecx,40(%eax)
+
+    mov 44(%esp),%ecx
+    mov %ecx,44(%eax)
+
+    pop %eax
+    pop %eax
+    pop %eax
+
+    popa
+
+    ret