openat on score

open and possibly create a file

sys_openat(int dfd, const char *filename, int flags, umode_t mode)
number56 (0x38)
abicommon
entry pointsys_openat
sinceLinux 3.7 or earlier (3.7 is the first release scanned for score)
man pageopenat(2)
sourceelixir.bootlin.com

Registers

registervalue
r2756, the syscall number
r4int dfd
r5const char *filename
r6int flags
r7umode_t mode
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/openat?kernel=all