# HG changeset patch
# User mir3636
# Date 1548139715 -32400
# Node ID 96af12a50fdb65479875144627c734c967cdf71e
# Parent  96a5833d0d82dc38c5750138c94ff330447b0193
fix cbc_read

diff -r 96a5833d0d82 -r 96af12a50fdb src/console.c
--- a/src/console.c	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/console.c	Tue Jan 22 15:48:35 2019 +0900
@@ -12,8 +12,8 @@
 #include "mmu.h"
 #include "proc.h"
 
-__code cbc_consoleread1 (__code(*)(int));
-__code cbc_consoleread2 (__code(*)(int));
+__code cbc_consoleread1 ();
+__code cbc_consoleread2 ();
 
 static void consputc (int);
 
@@ -233,19 +233,10 @@
     release(&input.lock);
 }
 
-__code cbc_consoleread2 (__code(*next)(int ret))
+__code cbc_consoleread2 ()
 {
-    int n = proc->cbc_arg.cbc_console_arg.n;
-    int target = proc->cbc_arg.cbc_console_arg.target;
-    char* dst = proc->cbc_arg.cbc_console_arg.dst;
     struct inode *ip = proc->cbc_arg.cbc_console_arg.ip;
-    struct file *f = proc->cbc_arg.cbc_console_arg.f;
-    proc->cbc_arg.cbc_console_arg.n = n;
-    proc->cbc_arg.cbc_console_arg.target = target;
-    proc->cbc_arg.cbc_console_arg.dst = dst;
-    proc->cbc_arg.cbc_console_arg.ip = ip;
-    proc->cbc_arg.cbc_console_arg.f = f;
-    proc->cbc_arg.cbc_console_arg.next = next;
+    __code(*next)(int ret) = proc->cbc_arg.cbc_console_arg.next;
     if (input.r == input.w) {
         if (proc->killed) {
             release(&input.lock);
@@ -254,10 +245,10 @@
         }
        goto cbc_sleep(&input.r, &input.lock, cbc_consoleread2);
     }
-    goto cbc_consoleread1(0);
+    goto cbc_consoleread1();
 }
 
-__code cbc_consoleread1 (__code(*next)(int ret))
+__code cbc_consoleread1 ()
 {
     int cont = 1;
     int n = proc->cbc_arg.cbc_console_arg.n;
@@ -265,6 +256,7 @@
     char* dst = proc->cbc_arg.cbc_console_arg.dst;
     struct inode *ip = proc->cbc_arg.cbc_console_arg.ip;
     struct file *f = proc->cbc_arg.cbc_console_arg.f;
+    __code(*next)(int ret) = proc->cbc_arg.cbc_console_arg.next;
     
     int c = input.buf[input.r++ % INPUT_BUF];
 
@@ -284,14 +276,16 @@
         cont = 0;
     }
 
-    if (n > 0) {
-        proc->cbc_arg.cbc_console_arg.n = n;
-        proc->cbc_arg.cbc_console_arg.target = target;
-        proc->cbc_arg.cbc_console_arg.dst = dst;
-        proc->cbc_arg.cbc_console_arg.ip = ip;
-        proc->cbc_arg.cbc_console_arg.f = f;
-        proc->cbc_arg.cbc_console_arg.next = next;
-        goto cbc_sleep(&input.r, &input.lock, cbc_consoleread2);
+    if (cont == 1) {
+        if (n > 0) {
+            proc->cbc_arg.cbc_console_arg.n = n;
+            proc->cbc_arg.cbc_console_arg.target = target;
+            proc->cbc_arg.cbc_console_arg.dst = dst;
+            proc->cbc_arg.cbc_console_arg.ip = ip;
+            proc->cbc_arg.cbc_console_arg.f = f;
+            proc->cbc_arg.cbc_console_arg.next = next;
+            goto cbc_sleep(&input.r, &input.lock, cbc_consoleread2);
+        }
     }
     
     release(&input.lock);
@@ -305,7 +299,7 @@
 
     //goto next(target - n);
 
-    goto cbc_ret(r);
+    goto next(r);
 }
 
 __code cbc_consoleread (struct inode *ip, char *dst, int n, struct file *f, __code(*next)(int ret))
diff -r 96a5833d0d82 -r 96af12a50fdb src/file.c
--- a/src/file.c	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/file.c	Tue Jan 22 15:48:35 2019 +0900
@@ -8,6 +8,7 @@
 #include "fs.h"
 #include "file.h"
 #include "spinlock.h"
+#include "proc.h"
 
 struct devsw devsw[NDEV];
 struct cbc_devsw cbc_devsw[NDEV];
@@ -100,7 +101,7 @@
     return -1;
 }
 
-__code cbc_fileread1 (int r, struct file *f, char *addr, int n, __code (*next)(int ret))
+__code cbc_fileread1 (int r, struct file *f, __code (*next)(int ret))
 {
     if (r > 0)
         f->off += r;
@@ -110,8 +111,6 @@
 
 __code cbc_fileread (struct file *f, char *addr, int n, __code (*next)(int ret))
 {
-    int r;
-
     if (f->readable == 0) {
         goto next(-1);
     }
@@ -123,7 +122,6 @@
 
     if (f->type == FD_INODE) {
         ilock(f->ip);
-
         goto cbc_readi(f->ip, addr, f->off, n, f, next);
     }
 
diff -r 96a5833d0d82 -r 96af12a50fdb src/fs.c
--- a/src/fs.c	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/fs.c	Tue Jan 22 15:48:35 2019 +0900
@@ -481,6 +481,10 @@
         brelse(bp);
     }
 
+    if (n > 0)
+        f->off += n;
+    iunlock(f->ip);
+
     goto next(n);
 }
 
diff -r 96a5833d0d82 -r 96af12a50fdb src/proc.c
--- a/src/proc.c	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/proc.c	Tue Jan 22 15:48:35 2019 +0900
@@ -471,6 +471,7 @@
     }
     proc->chan = chan;
     proc->state = SLEEPING;
+    proc->lk = lk;
     proc->cbc_next = next1;
 
     goto cbc_sched(cbc_sleep1);
diff -r 96a5833d0d82 -r 96af12a50fdb src/proc.h
--- a/src/proc.h	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/proc.h	Tue Jan 22 15:48:35 2019 +0900
@@ -71,11 +71,12 @@
     union cbc_arg {
         struct cbc_console_arg {
 	    int n;
-        int target;
-	    char* dst;
-	    struct inode *ip;
-	    struct file *f;
-	    __code (*next)(int ret);
+            int target;
+            char* dst;
+            struct inode *ip;
+            struct file *f;
+            int num;
+            __code (*next)(int ret);
         } cbc_console_arg;
     } cbc_arg;
     __code (*cbc_next)();
diff -r 96a5833d0d82 -r 96af12a50fdb src/syscall.c
--- a/src/syscall.c	Fri Jan 18 18:20:02 2019 +0900
+++ b/src/syscall.c	Tue Jan 22 15:48:35 2019 +0900
@@ -150,7 +150,10 @@
 }
 
 __code cbc_ret(int ret){
-    proc->tf->r0 = ret;
+    int num = proc->cbc_arg.cbc_console_arg.num;
+    if (num != SYS_exec) {
+        proc->tf->r0 = ret;
+    }
     goto cbc_trap_return();
 }
 
@@ -166,7 +169,7 @@
     //cprintf ("syscall(%d) from %s(%d)\n", num, proc->name, proc->pid);
 
     if((num >= NELEM(syscalls)) && (num <= NELEM(cbccodes)) && cbccodes[num]) {
-	
+        proc->cbc_arg.cbc_console_arg.num = num;	
     	goto (cbccodes[num])(cbc_ret);
     }