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authorMole Shang <[email protected]>2024-02-11 14:44:22 +0800
committerMole Shang <[email protected]>2024-02-11 16:06:15 +0800
commit2fe04bc8faa4bf737a86c36a8017473e84814f3b (patch)
tree2146d3dae86f21060e2e807ad364f5a949fd1c53 /kernel/sysinfo.c
parent5ce1f630132d8b7b35b9dc46b4a55f860eb85d5c (diff)
parent48a5e34fcd07852b4a68825ce8e37feb6f6d04d7 (diff)
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Merge branch 'traps' into cow
Conflicts: .gitignore Makefile conf/lab.mk
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;
+}
+