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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
22 lines
729 B
C
22 lines
729 B
C
#ifndef __MM0_FILE_H__
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#define __MM0_FILE_H__
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#include <l4/lib/list.h>
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#include <posix/sys/types.h>
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void vmfile_init(void);
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struct vm_file *vmfile_alloc_init(void);
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int vfs_receive_sys_open(l4id_t sender, l4id_t opener, int fd,
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unsigned long vnum, unsigned long size);
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int vfs_read(unsigned long vnum, unsigned long f_offset, unsigned long npages,
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void *pagebuf);
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int vfs_write(unsigned long vnum, unsigned long f_offset, unsigned long npages,
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void *pagebuf);
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int sys_read(l4id_t sender, int fd, void *buf, int count);
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int sys_write(l4id_t sender, int fd, void *buf, int count);
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int sys_lseek(l4id_t sender, int fd, off_t offset, int whence);
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extern struct list_head vm_file_list;
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#endif /* __MM0_FILE_H__ */
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