Changeset 440 for trunk/kernel/syscalls/sys_read.c

Timestamp:

May 3, 2018, 5:51:22 PM (5 years ago)

Author:

alain

Message:

1/ Fix a bug in the Multithreaded "sort" applicationr:
The pthread_create() arguments must be declared as global variables.
2/ The exit syscall can be called by any thread of a process..

File:

• trunk/kernel/syscalls/sys_read.c (modified) (4 diffs)

trunk/kernel/syscalls/sys_read.c

@@ -2 +2 @@
  * sys_read.c - read bytes from a file
  * 
- * Author     Alain Greiner (2016,2017)
+ * Author     Alain Greiner (2016,2017,2018)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -58 +58 @@
 {
     error_t      error;
-    paddr_t      paddr;       // required for user space checking
+    vseg_t     * vseg;        // required for user space checking
         xptr_t       file_xp;     // remote file extended pointer
     uint32_t     nbytes;      // number of bytes actually read
@@ -91 +91 @@
 
     // check user buffer in user space
-    error = vmm_v2p_translate( false , vaddr , &paddr );
+    error = vmm_get_vseg( process , (intptr_t)vaddr , &vseg );
 
     if ( error )
@@ -97 +97 @@
 
 #if DEBUG_SYSCALLS_ERROR
-printk("\n[ERROR] in %s : user buffer unmapped = %x\n", 
-__FUNCTION__ , (intptr_t)vaddr );
+printk("\n[ERROR] in %s : user buffer unmapped %x / thread %x / process %x\n",
+__FUNCTION__ , (intptr_t)vaddr, this->trdid, process->pid );
+vmm_display( process , false );
 #endif
                 this->errno = EINVAL;