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authorMole Shang <[email protected]>2024-01-18 17:35:27 +0800
committerMole Shang <[email protected]>2024-02-05 18:10:56 +0800
commit283d5ab4c964ab525e45fcade06d6fd7e977c43e (patch)
treebc44a1e2c447fb965cf5d5c2cfdcfa71658dbbbf /kernel/sysinfo.c
parent0d6a64fa06ce6aae729fa05a539eadd88fa59007 (diff)
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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.c24
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;
+}
+