shmctl on metag

System V shared memory control

sys_shmctl(int shmid, int cmd, struct shmid_ds *buf)
number195 (0xc3)
abicommon
kconfigCONFIG_SYSVIPC
familysysvipc see the whole family on metag
entry pointsys_shmctl
sinceLinux 3.9 or earlier (3.9 is the first release scanned for metag)
man pageshmctl(2)
sourceelixir.bootlin.com

Registers

registervalue
D1Re0195, the syscall number
D1Ar1int shmid
D0Ar2int cmd
D1Ar3struct shmid_ds *buf
D0Re0the return value

Then run SWITCH #0x440001 to enter the kernel.

Values wider than one register are packed into consecutive arguments.

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/metag/shmctl?kernel=all