sambuc/codezero
1
0
Fork 0
mirror of https://github.com/drasko/codezero.git synced 2026-02-27 01:03:14 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Shared tcb structures are made independent

Browse Source 
For clone, file descriptor and vm area structures need to be
separate from the tcb and reached via a pointer so that they
can be shared among multiple tcbs.
This commit is contained in:
Bahadir Balban
2008-09-09 22:17:42 +03:00
parent 002fe79a54
commit d7de9aa643
8 changed files with 156 additions and 176 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
tasks/mm0/include/task.h
View File

@@ -25,6 +25,12 @@
#define DEFAULT_UTCB_SIZE PAGE_SIZE
enum tcb_create_flags {
TCB_NO_SHARING = 0,
TCB_SHARED_VM = 1,
TCB_SHARED_FILES = 2,
};
struct vm_file;
struct file_descriptor {
@@ -33,6 +39,17 @@ struct file_descriptor {
struct vm_file *vmfile;
};
struct task_fd_head {
struct file_descriptor fd[TASK_FILES_MAX];
int tcb_refs;
};
struct task_vma_head {
struct list_head list;
int tcb_refs;
};
/* Stores all task information that can be kept in userspace. */
struct tcb {
/* Task list */
@@ -44,6 +61,7 @@ struct tcb {
/* Task ids */
int tid;
int spid;
int tgid;
/* Related task ids */
unsigned int pagerid; /* Task's pager */
@@ -76,10 +94,10 @@ struct tcb {
void *utcb;
/* Virtual memory areas */
struct list_head vm_area_list;
struct task_vma_head *vm_area_head;
/* File descriptors for this task */
struct file_descriptor fd[TASK_FILES_MAX];
struct task_fd_head *files;
};
/* Structures to use when sending new task information to vfs */
@@ -99,8 +117,11 @@ void task_add_global(struct tcb *t);
struct initdata;
void init_pm(struct initdata *initdata);
struct tcb *task_create(struct task_ids *ids, unsigned int flags);
struct tcb *task_create(struct task_ids *ids,
unsigned int ctrl_flags,
unsigned int alloc_flags);
int send_task_data(l4id_t requester);
void task_map_prefault_utcb(struct tcb *mapper, struct tcb *owner);
int copy_tcb(struct tcb *to, struct tcb *from, unsigned int flags);
#endif /* __TASK_H__ */

5
tasks/mm0/include/vm_area.h
View File

@@ -243,6 +243,11 @@ int validate_task_range(struct tcb *t, unsigned long start,
/* Changes all shadows and their ptes to read-only */
int vm_freeze_shadows(struct tcb *task);
static inline void task_add_vma(struct tcb *task, struct vm_area *vma)
{
list_add(&vma->list, &task->vm_area_head->list);
}
/* Main page fault entry point */
int page_fault_handler(l4id_t tid, fault_kdata_t *fkdata);