sambuc/codezero
1
0
Fork 0
mirror of https://github.com/drasko/codezero.git synced 2026-01-12 10:53:16 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

User pointer validity checks.

Browse Source 
Added routines that check whether a user pointer is accessible by the kernel,
and if not ask the pager to map-in those pages. I haven't implemented yet the
bit that asks the pager for paging-in.
This commit is contained in:
Bahadir Balban
2008-02-05 15:41:14 +00:00
parent 3a07ae70fd
commit a82cdd3456
8 changed files with 155 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/l4/arch/arm/exception.h
View File

@@ -85,4 +85,7 @@ static inline int in_user()
return !in_kernel();
}
int pager_pagein_request(unsigned long vaddr, unsigned long size,
unsigned int flags);
#endif

2
include/l4/generic/space.h
View File

@@ -18,4 +18,6 @@
#define MAP_SVC_DEFAULT_FLAGS MAP_SVC_RW_FLAGS
#define MAP_IO_DEFAULT_FLAGS MAP_SVC_IO_FLAGS
int check_access(unsigned long vaddr, unsigned long size, unsigned int flags);
#endif /* __SPACE_H__ */

6
include/l4/glue/arm/memory.h
View File

@@ -116,6 +116,12 @@ void remove_mapping(unsigned long vaddr);
void remove_mapping_pgd(unsigned long vaddr, pgd_table_t *pgd);
void prealloc_phys_pagedesc(void);
int check_mapping_pgd(unsigned long vaddr, unsigned long size,
unsigned int flags, pgd_table_t *pgd);
int check_mapping(unsigned long vaddr, unsigned long size,
unsigned int flags);
void copy_pgd_kern_all(pgd_table_t *);
pte_t virt_to_pte(unsigned long virtual);
pte_t virt_to_pte_from_pgd(unsigned long virtual, pgd_table_t *pgd);