From f0d3982a59d0cfb6e8b778c038ef4d65d5cd3f51 Mon Sep 17 00:00:00 2001
From: Baptiste Wicht <baptiste.wicht@gmail.com>
Date: Sun, 7 Aug 2016 13:20:42 +0200
Subject: [PATCH] System calls for mouse position

---
 kernel/src/system_calls.cpp | 17 +++++++++++++++++
 tlib/include/graphics.hpp   |  3 +++
 tlib/src/graphics.cpp       |  8 ++++++++
 3 files changed, 28 insertions(+)

diff --git a/kernel/src/system_calls.cpp b/kernel/src/system_calls.cpp
index b2e68ad5..9bb3ac0d 100644
--- a/kernel/src/system_calls.cpp
+++ b/kernel/src/system_calls.cpp
@@ -14,6 +14,7 @@
 #include "rtc.hpp"
 #include "kernel_utils.hpp"
 #include "vesa.hpp"
+#include "mouse.hpp"
 #include "vfs/vfs.hpp"
 
 namespace {
@@ -257,6 +258,14 @@ void sc_vesa_redraw(interrupt::syscall_regs* regs){
     vesa::redraw(new_buffer);
 }
 
+void sc_mouse_x(interrupt::syscall_regs* regs){
+    regs->rax = mouse::x();
+}
+
+void sc_mouse_y(interrupt::syscall_regs* regs){
+    regs->rax = mouse::y();
+}
+
 } //End of anonymous namespace
 
 void system_call_entry(interrupt::syscall_regs* regs){
@@ -416,6 +425,14 @@ void system_call_entry(interrupt::syscall_regs* regs){
             sc_vesa_redraw(regs);
             break;
 
+        case 0x1100:
+            sc_mouse_x(regs);
+            break;
+
+        case 0x1101:
+            sc_mouse_y(regs);
+            break;
+
         default:
             k_print_line("Invalid system call");
             break;
diff --git a/tlib/include/graphics.hpp b/tlib/include/graphics.hpp
index cbb8b137..72a0b92b 100644
--- a/tlib/include/graphics.hpp
+++ b/tlib/include/graphics.hpp
@@ -24,6 +24,9 @@ uint64_t get_red_shift();
 uint64_t get_green_shift();
 uint64_t get_blue_shift();
 
+uint64_t mouse_x();
+uint64_t mouse_y();
+
 void redraw(char* buffer);
 
 } // end of namespace graphics
diff --git a/tlib/src/graphics.cpp b/tlib/src/graphics.cpp
index 5c8c8d91..69366abb 100644
--- a/tlib/src/graphics.cpp
+++ b/tlib/src/graphics.cpp
@@ -58,3 +58,11 @@ void graphics::redraw(char* buffer){
         : [buffer] "g" (buffer)
         : "rax", "rbx");
 }
+
+uint64_t graphics::mouse_x(){
+    return syscall_get(0x1100);
+}
+
+uint64_t graphics::mouse_y(){
+    return syscall_get(0x1101);
+}