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Environment is backed by a special per-task file maintained by mm0 for each task. This file is filled in by the env pager, by simple copying of env data into the faulty page upon a fault. UTCB and all anon regions (stack) could use the same scheme. Fixed IS_ERR(x) to accept negative values that are above -1000 for errors. This protects against false positives for pointers such as 0xE0000000. modified: include/l4/generic/scheduler.h modified: include/l4/macros.h modified: src/arch/arm/exception.c modified: tasks/fs0/include/linker.lds modified: tasks/libl4/src/init.c modified: tasks/libposix/shm.c new file: tasks/mm0/include/env.h modified: tasks/mm0/include/file.h new file: tasks/mm0/include/lib/addr.h deleted: tasks/mm0/include/lib/vaddr.h modified: tasks/mm0/include/task.h new file: tasks/mm0/include/utcb.h new file: tasks/mm0/src/env.c modified: tasks/mm0/src/fault.c modified: tasks/mm0/src/file.c modified: tasks/mm0/src/init.c new file: tasks/mm0/src/lib/addr.c modified: tasks/mm0/src/lib/idpool.c deleted: tasks/mm0/src/lib/vaddr.c modified: tasks/mm0/src/mmap.c modified: tasks/mm0/src/shm.c modified: tasks/mm0/src/task.c new file: tasks/mm0/src/utcb.c modified: tasks/test0/include/linker.lds
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/*
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* Thread control block.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __TASK_H__
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#define __TASK_H__
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#include <l4/macros.h>
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#include <l4/types.h>
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#include INC_GLUE(memlayout.h)
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#include <l4/lib/list.h>
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#include <l4lib/types.h>
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#include <l4lib/utcb.h>
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#include <lib/addr.h>
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#define __TASKNAME__ __PAGERNAME__
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#define TASK_OFILES_MAX 32
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/* Allow per-task anonymous memory to grow as much as 1 MB for now. */
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#define TASK_SWAPFILE_MAXSIZE SZ_1MB
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struct vm_file;
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struct file_descriptor {
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unsigned long vnum;
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unsigned long cursor;
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struct vm_file *vmfile;
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};
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/* Stores all task information that can be kept in userspace. */
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struct tcb {
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/* Task list */
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struct list_head list;
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/* Name of the task */
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char name[16];
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/* Task ids */
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int tid;
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int spid;
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/* Related task ids */
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unsigned int pagerid; /* Task's pager */
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/* Program segment marks, ends exclusive as usual */
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unsigned long text_start;
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unsigned long text_end;
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unsigned long data_start;
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unsigned long data_end;
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unsigned long bss_start;
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unsigned long bss_end;
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unsigned long stack_start;
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unsigned long stack_end;
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unsigned long heap_start;
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unsigned long heap_end;
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unsigned long env_start;
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unsigned long env_end;
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unsigned long args_start;
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unsigned long args_end;
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/* UTCB address */
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unsigned long utcb_address;
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/* Temporary storage for environment data */
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void *env_data;
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unsigned long env_size;
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/* Per-task environment file */
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struct vm_file *env_file;
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/* Virtual memory areas */
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struct list_head vm_area_list;
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/* File descriptors for this task */
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struct file_descriptor fd[TASK_OFILES_MAX];
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/* Per-task swap file for now */
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struct vm_file *swap_file;
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/* Pool to generate swap file offsets for fileless anonymous regions */
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struct address_pool swap_file_offset_pool;
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};
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struct tcb *find_task(int tid);
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struct initdata;
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void init_pm(struct initdata *initdata);
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int start_init_tasks(struct initdata *initdata);
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void dump_tasks(void);
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void send_task_data(l4id_t requester);
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/* Used by servers that have a reference to tcbs (e.g. a pager) */
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#define current ((struct ktcb *)__L4_ARM_Utcb()->usr_handle)
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#endif /* __TASK_H__ */
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