lab mmap: finish

1 files changed, 35 insertions, 1 deletions

diff --git a/kernel/sysproc.c b/kernel/sysproc.c
index 715a511..abe1cdd 100644
--- a/kernel/sysproc.c
+++ b/kernel/sysproc.c
@@ -1,4 +1,5 @@
 #include "types.h"
+#include "fcntl.h"
 #include "riscv.h"
 #include "param.h"
 #include "defs.h"
@@ -140,7 +141,8 @@ sys_sigalarm(void)
   return 0;
 }
 
-uint64 sys_sigreturn(void)
+uint64
+sys_sigreturn(void)
 {
   struct proc *p = myproc();
   // retore saved trapframe to resume
@@ -150,3 +152,35 @@ uint64 sys_sigreturn(void)
   // make sure return the original a0 in trapframe to pass test3
   return p->trapframe->a0;
 }
+
+uint64
+sys_mmap(void)
+{
+  uint64 addr, len, offset;
+  int prot, flags, fd;
+  struct file* file;
+
+  argaddr(0, &addr);
+  argaddr(1, &len);
+  argint(2, &prot);
+  argint(3, &flags);
+  if(argfd(4, &fd, &file) == -1)
+    return 0xffffffffffffffff;
+  argaddr(5, &offset);
+
+  if(!(fileperm(file) & PROT_WRITE) && (prot & PROT_WRITE) && (flags == MAP_SHARED))
+    return 0xffffffffffffffff;
+
+  return mmap(addr, len, prot, flags, fd, file, offset);
+}
+
+uint64
+sys_munmap(void)
+{
+  uint64 addr, len;
+
+  argaddr(0, &addr);
+  argaddr(1, &len);
+
+  return munmap(addr, len);
+}