syscall.sh / sh / waitpid

waitpid

wait for process to change state

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

number	7 (0x7)
abi	common
entry point	`sys_waitpid`
since	Linux 5.0
man page	waitpid(2)
source	elixir.bootlin.com

Registers

register	value
`r3`	7, the syscall number
`r4`	pid_t pid
`r5`	int *stat_addr
`r6`	int options
`r0`	the return value

Then run trapa #31 to enter the kernel.

Same syscall on other architectures

x86 7
ppc64 7
ppc 7
mipso32 4007
m68k 7
microblaze 7
parisc 7
sparc 212
sparc64 212

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