From c2c03f41e078481921bad82487eded0fc51ebb59 Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Tue, 2 Dec 2014 01:02:49 +0100
Subject: further work on fork and friends

---
 asm/int_syscall_handler.asm | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

(limited to 'asm/int_syscall_handler.asm')

diff --git a/asm/int_syscall_handler.asm b/asm/int_syscall_handler.asm
index 504d3e8..70090f0 100644
--- a/asm/int_syscall_handler.asm
+++ b/asm/int_syscall_handler.asm
@@ -1,6 +1,7 @@
 global int_syscall_handler
 [extern task_fork]
 [extern task_exit]
+[extern task_wait]
 
 
 [extern syscall_exit]
@@ -25,13 +26,15 @@ pid: dd 0x0
 
 int_syscall_handler:
 
-
 cmp eax, 72
 je call_fork
 
 cmp eax, 60
 je call_exit
 
+cmp eax, 77
+je call_wait
+
  cli
 
     push ebx
@@ -96,12 +99,35 @@ done_blocking:
 
     iret           ;Interrupt-Return
 
+call_wait:
+
+    cli
+
+    pusha          ;Push all standard registers
+
+    mov ebx, esp	;save current stack pointer in esp
+    mov esp, 0x7000	;now put the stack outside of virtual memory in kernel space!
+
+    push ebx      ;Push pointer to all the stuff we just pushed
+
+    call task_wait ;Call C code
+
+    mov esp, eax   ;Replace the stack with what the C code gave us
+
+    popa           ;Put the standard registers back
+
+    sti
+
+    iretd           ;Interrupt-Return
+    ;;;;
+
 call_exit:
 
     cli
 
     pusha          ;Push all standard registers
 
+    mov ebx, esp	;save current stack pointer in esp
     mov esp, 0x7000	;now put the stack outside of virtual memory in kernel space!
 
     push ebx      ;Push pointer to all the stuff we just pushed
@@ -126,7 +152,7 @@ call_fork:
     mov ebx, esp	;save current stack pointer in esp
     mov esp, 0x7000	;now put the stack outside of virtual memory in kernel space!
 
-    push ebx      ;Push pointer to all the stuff we just pushed
+    push ebx
     call task_fork ;Call C code
     mov [pid],eax
 
-- 
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