From 5a8c9d2f2e4a3d2810f81c35070c6ef0926cfdd1 Mon Sep 17 00:00:00 2001
From: Fabian Imhof <fabian.imhof@ost.ch>
Date: Sat, 3 May 2025 09:45:45 +0000
Subject: write wrapper function for syscall

---
 .../arch/context_switching/syscall/main.hpp        | 28 ++++++++++++++++++++++
 .../context_switching/syscall/syscall_handler.hpp  | 23 ++++++++++++++++++
 .../generic_interrupt_handler.hpp                  |  8 -------
 3 files changed, 51 insertions(+), 8 deletions(-)
 create mode 100644 arch/x86_64/include/arch/context_switching/syscall/main.hpp
 create mode 100644 arch/x86_64/include/arch/context_switching/syscall/syscall_handler.hpp

(limited to 'arch/x86_64/include')

diff --git a/arch/x86_64/include/arch/context_switching/syscall/main.hpp b/arch/x86_64/include/arch/context_switching/syscall/main.hpp
new file mode 100644
index 0000000..c75268a
--- /dev/null
+++ b/arch/x86_64/include/arch/context_switching/syscall/main.hpp
@@ -0,0 +1,28 @@
+#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_MAIN_HPP
+#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_MAIN_HPP
+
+#include "arch/context_switching/syscall/syscall_handler.hpp"
+
+#include <array>
+#include <cstdint>
+#include <optional>
+
+namespace teachos::arch::context_switching::syscall
+{
+  struct arguments
+  {
+    uint64_t arg_0{};
+    uint64_t arg_1{};
+    uint64_t arg_2{};
+    uint64_t arg_3{};
+    uint64_t arg_4{};
+    uint64_t arg_5{};
+  };
+
+  auto enable_syscall() -> void;
+
+  auto syscall(type syscall_number, arguments args = {}) -> uint64_t;
+
+}  // namespace teachos::arch::context_switching::syscall
+
+#endif  // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_MAIN_HPP
diff --git a/arch/x86_64/include/arch/context_switching/syscall/syscall_handler.hpp b/arch/x86_64/include/arch/context_switching/syscall/syscall_handler.hpp
new file mode 100644
index 0000000..e076995
--- /dev/null
+++ b/arch/x86_64/include/arch/context_switching/syscall/syscall_handler.hpp
@@ -0,0 +1,23 @@
+#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_SYSCALL_HANDLER_HPP
+#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_SYSCALL_HANDLER_HPP
+
+#include <cstdint>
+
+namespace teachos::arch::context_switching::syscall
+{
+  enum type : uint64_t
+  {
+    WRITE = 1U
+  };
+
+  /**
+   * @brief Handler for SYSCALL instruction. Calls a specific implementation based
+   * on the register RAX.
+   *
+   * @return Returns with SYSRETQ
+   */
+  auto syscall_handler() -> void;
+
+}  // namespace teachos::arch::context_switching::syscall
+
+#endif  // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_SYSCALL_SYSCALL_HANDLER_HPP
diff --git a/arch/x86_64/include/arch/interrupt_handling/generic_interrupt_handler.hpp b/arch/x86_64/include/arch/interrupt_handling/generic_interrupt_handler.hpp
index 866d15d..8091a58 100644
--- a/arch/x86_64/include/arch/interrupt_handling/generic_interrupt_handler.hpp
+++ b/arch/x86_64/include/arch/interrupt_handling/generic_interrupt_handler.hpp
@@ -29,14 +29,6 @@ namespace teachos::arch::interrupt_handling
   [[gnu::interrupt]] [[gnu::section(".interrupt_text")]]
   auto generic_interrupt_handler(interrupt_frame * frame) -> void;
 
-  /**
-   * @brief Interrupt handler function for syscalls (INT 0x80).
-   *
-   * @param frame Pointer to the interrupt frame containing CPU state.
-   */
-  [[gnu::interrupt]] [[gnu::section(".interrupt_text")]]
-  auto syscall_interrupt_handler(interrupt_frame * frame) -> void;
-
 }  // namespace teachos::arch::interrupt_handling
 
 #endif  // TEACHOS_ARCH_X86_64_INTERRUPT_HANDLING_GENERIC_INTERRUPT_HANDLER_HPP
-- 
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