syscall.sh / x86 / waitpid

waitpid

wait for process to change state

sys_waitpid(pid_t pid, int *stat_addr, int options)

number	7 (0x7)
abi	i386
entry point	`sys_waitpid`
since	Linux 3.3
man page	waitpid(2)
source	elixir.bootlin.com

Registers

register	value
`eax`	7, the syscall number
`ebx`	pid_t pid
`ecx`	int *stat_addr
`edx`	int options
`eax`	the return value

Then run int 0x80 to enter the kernel.

Same syscall on other architectures

ppc64 7
ppc 7
mipso32 4007
m68k 7
microblaze 7
parisc 7
sh 7
sparc 212
sparc64 212

Get this as JSON: https://api.syscall.sh/v2/syscalls/x86/waitpid