1 files changed, 114 insertions, 0 deletions
diff --git a/asm/asm_task.s b/asm/asm_task.s
new file mode 100644
index 0000000..bf80025
--- /dev/null
+++ b/asm/asm_task.s
@@ -0,0 +1,114 @@
+.global task_pusha
+
+task_pusha:
+
+    pushf
+    push $0x8	   // code segment
+    push $userfunc
+
+    push $0x666
+    push $0x0
+
+    pusha
+
+    push %ds
+    push %es
+    push %fs
+    push %gs
+
+	/*
+
+	now stack looks like:
+
+	param			 // esp+72
+	returnaddy		
+
+	eflags			
+	code segment		
+	userfunc		
+
+	0x666
+
+	eax // rest by popa	
+	ecx			
+	edx			
+	ebx			
+	esp			
+	ebp			
+	esi			
+	edi			
+
+	ds
+	es
+	fs
+	gs
+
+	*/
+
+    mov 72(%esp),%eax // get address of alternative stack where we want to simulate the pusha happened
+
+    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)
+
+    mov 48(%esp),%ecx
+    mov %ecx,48(%eax)
+
+    mov 52(%esp),%ecx
+    mov %ecx,52(%eax)
+
+    mov 56(%esp),%ecx
+    mov %ecx,56(%eax)
+
+    mov 60(%esp),%ecx
+    mov %ecx,60(%eax)
+
+    mov 64(%esp),%ecx
+    mov %ecx,64(%eax)
+
+    pop %gs
+    pop %fs
+    pop %es
+    pop %ds
+
+    popa
+
+    pop %eax
+    pop %eax
+    pop %eax
+    pop %eax
+    pop %eax
+
+    ret