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https://github.com/drasko/codezero.git
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35d2d275b6
- fixed is_err(x), was evaluating x twice, resulting in calling a function x twice. - Divided task initialisation into multiple parts. - MM0 now creates a tcb for itself and maintains memory regions of its own. - MM0's tcb is used for mmapping other tasks' regions. MM0 mmaps and prefaults those regions, instead of the typical mmap() and fault approach used by non-pager tasks. For example there's an internal shmget_shmat() path to map in other tasks' shm utcbs. Those mappings are then prefaulted into mm0's address space using the default fault handling path. - FS0 now reads task data into its utcb from mm0 via a syscall. FS0 shmat()s to utcbs of other tasks, e.g. mm0 and test0. FS0 then crashes, that is to be fixed and where this commit is left last.
36 lines
674 B
C
36 lines
674 B
C
/*
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* Copyright (C) 2008 Bahadir Balban
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*/
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#ifndef __FS0_TASK_H__
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#define __FS0_TASK_H__
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#include <lib/idpool.h>
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#include <l4/lib/list.h>
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#include <l4/api/kip.h>
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#define __TASKNAME__ __VFSNAME__
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#define TASK_OFILES_MAX 32
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/* Thread control block, fs0 portion */
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struct tcb {
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l4id_t tid;
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unsigned long utcb_address;
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int utcb_mapped; /* Set if we mapped their utcb */
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struct list_head list;
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int fd[TASK_OFILES_MAX];
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struct id_pool *fdpool;
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struct vnode *curdir;
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struct vnode *rootdir;
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};
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static inline int task_is_utcb_mapped(struct tcb *t)
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{
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return t->utcb_mapped;
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}
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struct tcb *find_task(int tid);
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int init_task_data(void);
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#endif /* __FS0_TASK_H__ */
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