timer_create on ia32

create a POSIX per-process timer

compat_sys_timer_create(clockid_t which_clock, struct sigevent *timer_event_spec, timer_t *created_timer_id)

number	259 (0x103)
abi	i386
kconfig	`CONFIG_POSIX_TIMERS`
entry point	`compat_sys_timer_create`
since	Linux 3.3 or earlier (3.3 is the first release scanned for ia32)
man page	timer_create(2)
source	elixir.bootlin.com

Registers

register	value
`eax`	259, the syscall number
`ebx`	clockid_t which_clock
`ecx`	struct sigevent *timer_event_spec
`edx`	timer_t *created_timer_id
`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.