umount2 on score

unmount filesystem

sys_umount(char *name, int flags)
number39 (0x27)
abicommon
entry pointsys_umount
sinceLinux 3.7 or earlier (3.7 is the first release scanned for score)
man pageumount2(2)
sourceelixir.bootlin.com

Registers

registervalue
r2739, the syscall number
r4char *name
r5int flags
r4the return value

Then run syscall to enter the kernel.

r7 is the error flag and r4 then holds the positive error number.

This architecture was removed from the Linux kernel in Linux 4.17. The newest release with a syscall table here is Linux 4.16. The other removed architectures live on the historical architectures page.

Same syscall on other architectures

Get this as JSON: https://api.syscall.sh/v2/syscalls/score/umount2?kernel=all