working on filesys and readdir syscall

1 files changed, 28 insertions, 0 deletions

diff --git a/userspace/syscalls.c b/userspace/syscalls.c
index f4e77a1..f92541c 100644
--- a/userspace/syscalls.c
+++ b/userspace/syscalls.c
@@ -3,6 +3,8 @@
 
 #include <sys/stat.h>
 #include <string.h>
+#include <stdint.h>
+#include "../fs/fs.h"
 
 static int preread;
 static int alloc;
@@ -68,6 +70,32 @@ int read(int file, char *ptr, int len)
 	return ebx;
 }
 
+int readdir(const char *name,fs_dirent  *dirs,int max)
+{
+
+	int ebx; // WILL Hold return value;
+
+	asm("pusha");
+
+	// select syscall
+	asm("mov $63,%eax"); 
+
+	// pass params
+	asm("mov %0,%%edx"::"m"(name));
+	asm("mov %0,%%ecx"::"m"(dirs));
+	asm("mov %0,%%ebx"::"m"(max));
+
+	// interrrupt
+	asm("int $0x80");
+
+	// get return value
+        asm("mov %%ebx, %0": "=b" (ebx));
+
+	asm("popa");
+
+	return ebx;
+}
+
 int open(const char *name, int flags, int mode)
 {
 //   easywrite("syscall: open\n");