request_key on score

request a key from the kernel's key management facility

sys_request_key(const char *_type, const char *_description, const char *_callout_info, key_serial_t destringid)
number218 (0xda)
abicommon
kconfigCONFIG_KEYS
familykeys see the whole family on score
entry pointsys_request_key
sinceLinux 3.7 or earlier (3.7 is the first release scanned for score)
man pagerequest_key(2)
sourceelixir.bootlin.com

Registers

registervalue
r27218, the syscall number
r4const char *_type
r5const char *_description
r6const char *_callout_info
r7key_serial_t destringid
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/request_key?kernel=all