From a013855e73ef9245669716b145042e98fc970b75 Mon Sep 17 00:00:00 2001
From: Adrien Bourmault <neox@os-k.eu>
Date: Tue, 9 Mar 2021 11:50:16 +0100
Subject: [PATCH] Syscalls : print & flush

---
 kaleid/kernel/ke/syscall.c | 48 ++++++++++++++------------------------
 1 file changed, 18 insertions(+), 30 deletions(-)

diff --git a/kaleid/kernel/ke/syscall.c b/kaleid/kernel/ke/syscall.c
index 5dc2c1f..6aaf3be 100644
--- a/kaleid/kernel/ke/syscall.c
+++ b/kaleid/kernel/ke/syscall.c
@@ -60,36 +60,24 @@ static error_t syscallStub(void *rdi, void *rsi, void *rdx, void *rcx, ISRFrame_
     return ENOSYS;
 }
 
-static error_t syscallRead(void *descriptor, void *address, void *flags, void *rcx, ISRFrame_t *regs)
+static error_t syscallPrint(void *id, void *string, void *rdx, void *rcx, ISRFrame_t *regs)
 {
-    return ENOSYS;
+    Buffer_t *buf = NULL;
+    if (*(ulong*)id == 0) {
+        buf = BStdOut;
+    }
+    
+    return BPrintOnBuf(buf, (char*)string);
 }
 
-static error_t syscallWrite(void *descriptor, void *address, void *flags, void *rcx, ISRFrame_t *regs)
+static error_t syscallFlush(void *id, void *rdi, void *rdx, void *rcx, ISRFrame_t *regs)
 {
-    return ENOSYS;
-}
-
-static error_t syscallOpen(void *descriptor, void *address, void *size, void *rcx, ISRFrame_t *regs)
-{
-    /* TODO 
-        - lock the zone 
-        - check if permitted
-        - modify descriptor according to what has been done
-        - return */
-        
-    return ENOSYS;
-}
-
-static error_t syscallClose(void *descriptor, void *address, void *flags, void *rcx, ISRFrame_t *regs)
-{
-    /* TODO 
-        - lock the zone 
-        - check if permitted using descriptor
-        - use flags to know what to do
-        - return */
-        
-    return ENOSYS;
+    Buffer_t *buf = NULL;
+    if (*(ulong*)id == 0) {
+        buf = BStdOut;
+    }
+    
+    return BFlushBuf(buf);
 }
 
 static error_t syscallKernelShell(void *rdi, void *rsi, void *rdx, void *rcx, ISRFrame_t *regs)
@@ -105,10 +93,10 @@ static error_t syscallKernelShell(void *rdi, void *rsi, void *rdx, void *rcx, IS
 //
 void KeEnableSyscalls()
 {
-    syscallTable[0] = syscallRead;
-    syscallTable[1] = syscallWrite;
-    syscallTable[2] = syscallOpen;
-    syscallTable[3] = syscallClose;
+    syscallTable[0] = syscallPrint;
+    syscallTable[1] = syscallFlush;
+    syscallTable[2] = syscallStub;
+    syscallTable[3] = syscallStub;
     syscallTable[4] = syscallKernelShell;
     syscallTable[5] = syscallStub;
 }