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author | Mole Shang <[email protected]> | 2024-01-18 17:35:27 +0800 |
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committer | Mole Shang <[email protected]> | 2024-02-05 18:10:56 +0800 |
commit | 283d5ab4c964ab525e45fcade06d6fd7e977c43e (patch) | |
tree | bc44a1e2c447fb965cf5d5c2cfdcfa71658dbbbf /kernel/sysinfo.c | |
parent | 0d6a64fa06ce6aae729fa05a539eadd88fa59007 (diff) | |
download | xv6-labs-283d5ab4c964ab525e45fcade06d6fd7e977c43e.tar.gz xv6-labs-283d5ab4c964ab525e45fcade06d6fd7e977c43e.tar.bz2 xv6-labs-283d5ab4c964ab525e45fcade06d6fd7e977c43e.zip |
lab syscall: finish
Conflicts:
kernel/syscall.c
kernel/syscall.h
user/user.h
user/usys.pl
Diffstat (limited to 'kernel/sysinfo.c')
-rw-r--r-- | kernel/sysinfo.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/sysinfo.c b/kernel/sysinfo.c new file mode 100644 index 0000000..c66324d --- /dev/null +++ b/kernel/sysinfo.c @@ -0,0 +1,24 @@ +#include "types.h" +#include "riscv.h" +#include "param.h" +#include "spinlock.h" +#include "defs.h" +#include "sysinfo.h" +#include "proc.h" + +// Get current system info +// addr is a user virtual address, pointing to a struct sysinfo. +int +sys_info(uint64 addr) { + struct proc *p = myproc(); + struct sysinfo info; + + // Fill nums into the sysinfo struct + info.freemem = get_freemem(); + info.nproc = get_nproc(); + + if(copyout(p->pagetable, addr, (char *)&info, sizeof(info)) < 0) + return -1; + return 0; +} + |