From 8cd22309667cf3da9c357e5b7dca43e8b6a2f9c0 Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Fri, 21 Jan 2022 12:10:05 -0600 Subject: arch: i386: move non-critial files out of boot Move all files not needed for the bootstrap process out of boot and into the main x86 source directory. Signed-off-by: Danny Holman --- arch/i386/kernel/syscall.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 arch/i386/kernel/syscall.c (limited to 'arch/i386/kernel/syscall.c') 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 +#include +#include + +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); +} -- cgit v1.2.3