Linux kernel system calls for all architectures

Linux provides many system calls for userspace. But numbers used for them differ between architectures. This page was created to help developers find those values.

But there is another issue. Some of system calls got dropped during Linux development, some got replaced by newer ones. Several architectures got added into kernel later and their maintainers decided to not bother with supporting obsoleted system calls. They are marked with "-1" value in table below.

How to use

There are few features you can use:

• search field allows to filter table by syscall name or number
• system call names link to their man pages
• 'disable architectures' button allows to disable not needed columns
• clicking on header entries sorts table
• columns can be reordered by dragging column header

Some notes

• table is updated at random moments — usually somewhere after rc1 kernel release
• old data is used for architectures removed from Linux kernel (everything from avr32 to the end of table)
• system calls specific to above architectures were removed
• system calls listed in man 2 unimplemented are not listed

Author info

System calls table is maintained by Marcin Juszkiewicz — AArch64/Arm developer working at Red Hat as Linaro assignee.

How to help

Sources used to generate table are available in git repository at github. Patches are always welcomed.

If this table helped you in some project then please leave a comment in issue on GitHub.

Build info

Table generated on $generate_time using data from $kernel_version kernel source.