From 8debc64b83ea1517fc3616ec281e4751dc44165a Mon Sep 17 00:00:00 2001
From: Tulio A M Mendes <tadryanom@hotmail.com>
Date: Fri, 13 Feb 2026 16:48:51 -0300
Subject: [PATCH] refactor: move syscall_init arch dispatch to
 arch/x86/sysenter_init.c
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- Add arch_syscall_init() that registers INT 0x80 handler and calls x86_sysenter_init()
- syscall_init() now just calls arch_syscall_init() — zero #ifdef in syscall.c
- x86_sysenter_init() made static (internal to sysenter_init.c)
- syscall.c contains ZERO architecture-specific code or #ifdefs

20/20 smoke, cppcheck clean
---
 include/arch_syscall.h       |  7 +++++++
 src/arch/x86/sysenter_init.c | 13 ++++++++++++-
 src/kernel/syscall.c         |  8 +-------
 3 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/include/arch_syscall.h b/include/arch_syscall.h
index 2a6f8bb3..07cbe946 100644
--- a/include/arch_syscall.h
+++ b/include/arch_syscall.h
@@ -51,4 +51,11 @@ extern uint32_t __arch_syscall_stub_sink;
 
 #endif
 
+/*
+ * arch_syscall_init — Register the syscall entry point(s) for this
+ *                     architecture (e.g. INT 0x80 + SYSENTER on x86).
+ *                     Called once from the generic syscall_init().
+ */
+void arch_syscall_init(void);
+
 #endif /* ARCH_SYSCALL_H */
diff --git a/src/arch/x86/sysenter_init.c b/src/arch/x86/sysenter_init.c
index 265e1bd7..01a68880 100644
--- a/src/arch/x86/sysenter_init.c
+++ b/src/arch/x86/sysenter_init.c
@@ -8,6 +8,7 @@
  */
 
 #include "hal/cpu_features.h"
+#include "interrupts.h"
 #include "console.h"
 
 #include <stdint.h>
@@ -38,7 +39,17 @@ static inline uint64_t rdmsr(uint32_t msr) {
 static uint8_t sysenter_stack[4096] __attribute__((aligned(16)));
 static int sysenter_enabled = 0;
 
-void x86_sysenter_init(void) {
+static void x86_sysenter_init(void);
+
+/* Generic syscall_handler defined in src/kernel/syscall.c */
+extern void syscall_handler(struct registers*);
+
+void arch_syscall_init(void) {
+    register_interrupt_handler(128, syscall_handler);
+    x86_sysenter_init();
+}
+
+static void x86_sysenter_init(void) {
     const struct cpu_features* f = hal_cpu_get_features();
     if (!f->has_sysenter) {
         kprintf("[SYSENTER] CPU does not support SYSENTER/SYSEXIT.\n");
diff --git a/src/kernel/syscall.c b/src/kernel/syscall.c
index d554db70..6b1b9b4b 100644
--- a/src/kernel/syscall.c
+++ b/src/kernel/syscall.c
@@ -25,9 +25,6 @@
 #include "shm.h"
 #include "socket.h"
 
-#if defined(__i386__)
-extern void x86_sysenter_init(void);
-#endif
 #include "elf.h"
 #include "stat.h"
 #include "vmm.h"
@@ -2772,8 +2769,5 @@ static void socket_syscall_dispatch(struct registers* regs, uint32_t syscall_no)
 }
 
 void syscall_init(void) {
-#if defined(__i386__)
-    register_interrupt_handler(128, syscall_handler);
-    x86_sysenter_init();
-#endif
+    arch_syscall_init();
 }
-- 
2.43.0