banan-os/kernel/arch/i686/Syscall.S

.global sys_fork_trampoline
sys_fork_trampoline:
	pushl %ebp
	pushl %ebx
	pushl %esi
	pushl %edi

	call read_ip
	testl %eax, %eax
	jz .reload_stack

	movl %esp, %ebx

	subl $8, %esp
	pushl %eax
	pushl %ebx
	call sys_fork
	addl $16, %esp

 .done:
	popl %edi
	popl %esi
	popl %ebx
	popl %ebp
	ret

 .reload_stack:
	call get_thread_start_sp
	movl %eax, %esp
	xorl %eax, %eax
	jmp .done
Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`.global sys_fork_trampoline`
			`sys_fork_trampoline:`
			`pushl %ebp`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00			`pushl %ebx`
			`pushl %esi`
			`pushl %edi`

Kernel: Rename rsp->sp and rip->ip This makes more sense if we support i386 2024-03-22 14:48:33 +02:00			`call read_ip`
Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`testl %eax, %eax`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00			`jz .reload_stack`

			`movl %esp, %ebx`

Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`subl $8, %esp`
			`pushl %eax`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00			`pushl %ebx`
Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`call sys_fork`
			`addl $16, %esp`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00
			`.done:`
			`popl %edi`
			`popl %esi`
Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`popl %ebx`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00			`popl %ebp`
Kernel: Move sys_fork trampolines to kernel/arch/ directory 2024-03-22 12:48:54 +02:00			`ret`
Kernel: Implement syscalls for i686 and cleanup x86_64 This actually allows i686 to boot properly! 2024-04-03 02:23:23 +03:00
			`.reload_stack:`
			`call get_thread_start_sp`
			`movl %eax, %esp`
			`xorl %eax, %eax`
			`jmp .done`