futex on m32r

fast user-space locking

sys_futex(u32 *uaddr, int op, u32 val, struct timespec *utime, u32 *uaddr2, u32 val3)
number240 (0xf0)
abicommon
entry pointsys_futex
sinceLinux 3.3 or earlier (3.3 is the first release scanned for m32r)
man pagefutex(2)
sourceelixir.bootlin.com

Registers

registervalue
r7240, the syscall number
r0u32 *uaddr
r1int op
r2u32 val
r3struct timespec *utime
r4u32 *uaddr2
r5u32 val3
r0the return value

Then run trap #2 to enter the kernel.

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/m32r/futex?kernel=all