cachestat

query the page cache statistics of a file

sys_cachestat(unsigned int fd, struct cachestat_range *cstat_range, struct cachestat *cstat, unsigned int flags)

register	value
`g1`	451, the syscall number
`o0`	unsigned int fd
`o1`	struct cachestat_range *cstat_range
`o2`	struct cachestat *cstat
`o3`	unsigned int flags
`o0`	the return value

Then run t 0x6d to enter the kernel.

Same syscall on other architectures