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Mapping precision fixes on l4_unmap and do_munmap()

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l4_unmap now returns -1 if given range was only partially unmapped.

do_munmap() now only unmaps address ranges that have correspondence in
the unmapped vmas. Trying to unmap regions with no correspondent vmas
causes problems in corner cases, e.g. mm0 that tries to mmap its own
address space during initialisation would unmap its whole address space
and fail to execute.
This commit is contained in:
Bahadir Balban
2008-11-08 10:18:35 +02:00
parent 0e3f069713
commit 94daebd0c5
7 changed files with 82 additions and 39 deletions
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4
include/l4/glue/arm/memory.h
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@@ -111,8 +111,8 @@ void add_mapping_pgd(unsigned int paddr, unsigned int vaddr,
pgd_table_t *pgd);
void add_mapping(unsigned int paddr, unsigned int vaddr,
unsigned int size, unsigned int flags);
void remove_mapping(unsigned long vaddr);
void remove_mapping_pgd(unsigned long vaddr, pgd_table_t *pgd);
int remove_mapping(unsigned long vaddr);
int 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,