Changeset 408 for trunk/kernel/syscalls/sys_read.c

Timestamp:

Dec 5, 2017, 4:20:07 PM (6 years ago)

Author:

alain

Message:

Fix several bugs in the fork() syscall.

File:

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

trunk/kernel/syscalls/sys_read.c

@@ -61 +61 @@
         xptr_t       file_xp;     // remote file extended pointer
     uint32_t     nbytes;      // number of bytes actually read
-
+    reg_t        save_sr;     // required to enable IRQs during syscall
         uint32_t     tm_start;
         uint32_t     tm_end;
@@ -93 +93 @@
                 return -1;
     }
+
+    // enable IRQs
+    hal_enable_irq( &save_sr );
 
     // get extended pointer on remote file descriptor
@@ -150 +153 @@
         return -1;
     }
+
+    // restore IRQs
+    hal_restore_irq( save_sr );
 
     hal_fence();
@@ -190 +196 @@
 #endif
 
-syscall_dmsg("\n[DBG] %s : core[%x,%d] / thread %x / nbytes = %d / cycle %d\n"
-" first byte = %c / file_id = %d / cost = %d\n",
-__FUNCTION__ , local_cxy , this->core->lid , this->trdid , nbytes , tm_start ,
-*((char *)(intptr_t)paddr) , file_id , tm_end - tm_start );
+syscall_dmsg("\n[DBG] %s : core[%x,%d] / thread %x in process %x / cycle %d\n"
+"nbytes = %d / first byte = %c / file_id = %d / cost = %d\n",
+__FUNCTION__ , local_cxy , this->core->lid , this->trdid , this->process->pid ,
+tm_start , nbytes , *((char *)(intptr_t)paddr) , file_id , tm_end - tm_start );
  
         return nbytes;