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Added utcb create/destroy and better reorganized calls to them.

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This commit is contained in:
Bahadir Balban
2009-05-01 17:06:24 +03:00
parent 8ca0ca9cfb
commit 260527c0a3
5 changed files with 101 additions and 17 deletions
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33
tasks/mm0/src/task.c
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@@ -7,29 +7,32 @@
#include <l4/config.h>
#include <l4/types.h>
#include <l4/lib/list.h>
#include <l4/lib/math.h>
#include <l4/api/thread.h>
#include <l4/api/kip.h>
#include <l4/api/errno.h>
#include INC_GLUE(memory.h)
#include <l4lib/arch/syscalls.h>
#include <l4lib/arch/syslib.h>
#include <l4lib/arch/utcb.h>
#include <l4lib/ipcdefs.h>
#include <l4lib/exregs.h>
#include <l4/lib/math.h>
#include <lib/addr.h>
#include <lib/malloc.h>
#include <init.h>
#include <string.h>
#include <vm_area.h>
#include <memory.h>
#include <globals.h>
#include <file.h>
#include <task.h>
#include <exec.h>
#include <shm.h>
#include <mmap.h>
#include <boot.h>
#include <globals.h>
#include <test.h>
#include <utcb.h>
@@ -150,6 +153,17 @@ int task_free_resources(struct tcb *task)
kfree(task->vm_area_head);
}
/*
* Threads may share utcb chain
*/
if (!(--task->utcb_head->tcb_refs)) {
/* UTCBs must have been deleted explicitly */
BUG_ON(!list_empty(&task->utcb_head->list));
/* Free the head */
kfree(task->utcb_head);
}
return 0;
}
@@ -269,9 +283,6 @@ int copy_tcb(struct tcb *to, struct tcb *from, unsigned int flags)
*/
}
/* Set up a new utcb for new thread */
task_setup_utcb(to);
/* Copy all file descriptors */
if (flags & TCB_SHARED_FILES) {
to->files = from->files;
@@ -336,6 +347,10 @@ struct tcb *task_create(struct tcb *parent, struct task_ids *ids,
if (parent) {
copy_tcb(task, parent, share_flags);
/* Set up a new utcb for new thread */
task_setup_utcb(task);
/* Set up parent-child relationship */
if ((share_flags & TCB_SHARED_PARENT) ||
(share_flags & TCB_SHARED_TGROUP)) {
@@ -557,10 +572,12 @@ int task_mmap_segments(struct tcb *task, struct vm_file *file, struct exec_file_
return err;
}
/* Get a new utcb slot for new task */
task_setup_utcb(task);
/*
* Task already has recycled task's shared page. It will attach to it
* when it starts in userspace. Task also already utilizes recycled
* task's utcb.
* Recycled task's shared page shm still exists. Current task will
* attach to it when it starts in userspace.
*/
//if (IS_ERR(shm = shm_new((key_t)task->utcb, __pfn(DEFAULT_UTCB_SIZE))))
// return (int)shm;