From 4c27aa020309f756de85b39b9879dfe2f544b123 Mon Sep 17 00:00:00 2001
From: EDiasAlberto <proxamon1@gmail.com>
Date: Mon, 4 Nov 2024 00:57:19 +0000
Subject: [PATCH] Complete syscall lookup table, and syscall stubs and
 skeletons w/ S.

---
 src/userprog/syscall.c | 97 ++++++++++++++++++++++++++++++++++++++++++
 src/userprog/syscall.h |  2 +
 2 files changed, 99 insertions(+)

diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 5e53cd3..0e0a050 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -16,6 +16,17 @@ typedef uintptr_t (*syscall_function) (uintptr_t, uintptr_t, uintptr_t);
 /* System Call Functions */
 static void halt (void);
 static void exit (int status);
+static pid_t exec (const char *cmd_line);
+static int wait (pid_t pid);
+static bool file_create (const char *file, unsigned initial_size);
+static bool file_remove (const char *file);
+static int open (const char *file);
+static int filesize (int fd);
+static int read (int fd, void *buffer, unsigned size);
+static int write (int fd, const void *buffer, unsigned size);
+static void seek (int fd, unsigned position);
+static unsigned tell (int fd);
+static void close (int fd);
 
 static void *validate_user_pointer(void *ptr, size_t size);
 
@@ -29,6 +40,17 @@ typedef struct {
 static const syscall_arguments syscall_lookup[] = {
   [SYS_HALT] = {(syscall_function) halt, 0},
   [SYS_EXIT] = {(syscall_function) exit, 1},
+  [SYS_EXEC] = {(syscall_function) exec, 1},
+  [SYS_WAIT] = {(syscall_function) wait, 1},
+  [SYS_CREATE] = {(syscall_function) file_create, 2},
+  [SYS_REMOVE] = {(syscall_function) file_remove, 1},
+  [SYS_OPEN] = {(syscall_function) open, 1},
+  [SYS_FILESIZE] = {(syscall_function) filesize, 1},
+  [SYS_READ] = {(syscall_function) read, 3},
+  [SYS_WRITE] = {(syscall_function) write, 3},
+  [SYS_SEEK] = {(syscall_function) seek, 2},
+  [SYS_TELL] = {(syscall_function) tell, 1},
+  [SYS_CLOSE] = {(syscall_function) close, 1},
 };
 
 static const int lookup_size
@@ -72,6 +94,81 @@ exit (int status)
   //TODO
 }
 
+static pid_t
+exec (const char *cmd_line)
+{
+  //TODO
+  return 0;
+}
+
+static int
+wait (pid_t pid)
+{
+  //TODO
+  return 0;
+}
+
+static bool
+file_create (const char *file, unsigned initial_size)
+{
+  //TODO
+  return 0;
+}
+
+static bool
+file_remove (const char *file)
+{
+  //TODO
+  return 0;
+}
+
+static int
+open (const char *file)
+{
+  //TODO
+  return 0;
+}
+
+static int
+filesize (int fd)
+{
+  //TODO
+  return 0;
+}
+
+static int
+read (int fd, void *buffer, unsigned size)
+{
+  //TODO
+  return 0;
+}
+
+static int
+write (int fd, const void *buffer, unsigned size)
+{
+  //TODO
+  return 0;
+}
+
+static void
+seek (int fd, unsigned position)
+{
+  //TODO
+}
+
+static unsigned
+tell (int fd)
+{
+  //TODO
+  return 0;
+}
+
+static void
+close (int fd)
+{
+  //TODO
+}
+
 /* A function to validate if a block of memory starting at PTR and of
    size SIZE bytes is fully contained within user virtual memory.  */
 static void *
diff --git a/src/userprog/syscall.h b/src/userprog/syscall.h
index 9059096..702a6c7 100644
--- a/src/userprog/syscall.h
+++ b/src/userprog/syscall.h
@@ -1,6 +1,8 @@
 #ifndef USERPROG_SYSCALL_H
 #define USERPROG_SYSCALL_H
 
+typedef int pid_t;
+
 void syscall_init (void);
 
 #endif /* userprog/syscall.h */