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Modified task initialisation so that stack now comes beneath the environment

Browse Source 
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
This commit is contained in:
Bahadir Balban
2008-02-29 01:43:56 +00:00
parent 5b7bb88008
commit 617d24b4f0
24 changed files with 316 additions and 144 deletions
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23
tasks/mm0/include/lib/addr.h Normal file
View File

@@ -0,0 +1,23 @@
/*
* Address allocation pool
*
* Copyright (C) 2007 Bahadir Balban
*/
#ifndef __ADDR_H__
#define __ADDR_H__
#include <lib/idpool.h>
/* Address pool to allocate from a range of addresses */
struct address_pool {
struct id_pool *idpool;
unsigned long start;
unsigned long end;
};
int address_pool_init(struct address_pool *pool, unsigned long start,
unsigned long end);
void *address_new(struct address_pool *pool, int npages);
int address_del(struct address_pool *, void *addr, int npages);
#endif /* __ADDR_H__ */

17
tasks/mm0/include/lib/vaddr.h
View File

@@ -1,17 +0,0 @@
/*
* Virtual address allocation pool (for shm)
*
* Copyright (C) 2007 Bahadir Balban
*/
#ifndef __VADDR_H__
#define __VADDR_H__
#include <lib/idpool.h>
void vaddr_pool_init(struct id_pool *pool, unsigned long start,
unsigned long end);
void *vaddr_new(struct id_pool *pool, int npages);
int vaddr_del(struct id_pool *, void *vaddr, int npages);
#endif /* __VADDR_H__ */