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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]> | 2024-01-18 17:35:27 +0800 |
commit | 493159b9bb1a764926daa49fb09bff8f29e8e9e5 (patch) | |
tree | bcae49e20df0ab9d86dab9bd10226807cc432f88 /kernel/sysinfo.c | |
parent | 33ca12a4653752d179e6296c7ca2f91a626d30f3 (diff) | |
download | xv6-labs-syscall.tar.gz xv6-labs-syscall.tar.bz2 xv6-labs-syscall.zip |
lab syscall: finishsyscall
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; +} + |