accept4 on ia32

accept a connection on a socket

sys_accept4(int fd, struct sockaddr *upeer_sockaddr, int *upeer_addrlen, int flags)

Registers

register	value
`eax`	364, the syscall number
`ebx`	int fd
`ecx`	struct sockaddr *upeer_sockaddr
`edx`	int *upeer_addrlen
`esi`	int flags
`eax`	the return value

Then run int 0x80 to enter the kernel.

This compat ABI is only available when the kernel is built with CONFIG_IA32_EMULATION.