From 283d5ab4c964ab525e45fcade06d6fd7e977c43e Mon Sep 17 00:00:00 2001 From: Mole Shang <135e2@135e2.dev> Date: Thu, 18 Jan 2024 17:35:27 +0800 Subject: lab syscall: finish Conflicts: kernel/syscall.c kernel/syscall.h user/user.h user/usys.pl --- kernel/kalloc.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'kernel/kalloc.c') diff --git a/kernel/kalloc.c b/kernel/kalloc.c index 0699e7e..c2fdb86 100644 --- a/kernel/kalloc.c +++ b/kernel/kalloc.c @@ -80,3 +80,17 @@ kalloc(void) memset((char*)r, 5, PGSIZE); // fill with junk return (void*)r; } + +int +get_freemem(void) +{ + int n; + struct run *r; + + acquire(&kmem.lock); + for (n = 0, r = kmem.freelist; r; r = r->next) + n++; + release(&kmem.lock); + + return n * PGSIZE; +} -- cgit v1.2.3