1 files changed, 42 insertions, 0 deletions
diff --git a/arch/i386/kernel/syscall.c b/arch/i386/kernel/syscall.c
new file mode 100644
index 0000000..570f0de
--- /dev/null
+++ b/arch/i386/kernel/syscall.c
@@ -0,0 +1,42 @@
+#include <kernel/syscall.h>
+#include <kernel/io.h>
+#include <stddef.h>
+
+void *(*syscall_handlers[30])(struct isr_frame *frame);
+
+void syscall_dispatch(struct isr_frame *frame) {
+        if (syscall_handlers[frame->eax] != NULL)
+                syscall_handlers[frame->eax](frame);
+        else
+                kprintf("Error: Invalid system call number: %d\n", frame->eax);
+        __asm__ volatile("cli;hlt");
+}
+
+void register_syscall(void *handler(struct isr_frame*), int num) {
+        syscall_handlers[num] = handler;
+}
+
+void sys_stop(struct isr_frame *frame) {
+        kprintf("SYSTEM CALL: STOP\n");
+        halt_catch_fire(frame);
+}
+
+void sys_status(struct isr_frame *frame) {
+        kprintf("SYSTEM CALL: STATUS\n");
+        dump_reg(frame);
+}
+
+void dump_reg(struct isr_frame *frame) {
+        kprintf("Registers at interrupt:\n");
+        kprintf("\tEAX = %x\n", frame->eax);
+        kprintf("\tEBX = %x\n", frame->ebx);
+        kprintf("\tECX = %x\n", frame->ecx);
+        kprintf("\tEDX = %x\n", frame->edx);
+        kprintf("\tESI = %x\n", frame->esi);
+        kprintf("\tEDI = %x\n", frame->edi);
+        kprintf("\tESP = %x\n", frame->esp);
+        kprintf("\tEBP = %x\n", frame->ebp);
+        kprintf("\tEIP = %x\n", frame->eip);
+        kprintf("\tEFLAGS = %x\n", frame->eflags);
+        kprintf("Current code selector: %d\n", frame->cs);
+}