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#include <typedefs.h>
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#include <typedefs.h>
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#include <synch/spinlock.h>
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#include <synch/spinlock.h>
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#include <synch/mutex.h>
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#include <synch/mutex.h>
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#include <adt/list.h>
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#include <adt/list.h>
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#include <adt/btree.h>
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#include <adt/btree.h>
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#include <elf.h>
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/** Defined to be true if user address space and kernel address space shadow each other. */
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/** Defined to be true if user address space and kernel address space shadow each other. */
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#define KERNEL_ADDRESS_SPACE_SHADOWED   KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
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#define KERNEL_ADDRESS_SPACE_SHADOWED   KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
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#define KERNEL_ADDRESS_SPACE_START  KERNEL_ADDRESS_SPACE_START_ARCH
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#define KERNEL_ADDRESS_SPACE_START  KERNEL_ADDRESS_SPACE_START_ARCH
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    void (* frame_free)(as_area_t *area, __address page, __address frame);
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    void (* frame_free)(as_area_t *area, __address page, __address frame);
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    void (* share)(as_area_t *area);
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    void (* share)(as_area_t *area);
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} mem_backend_t;
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} mem_backend_t;
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/** Backend data stored in address space area. */
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/** Backend data stored in address space area. */
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typedef struct backend_data {
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typedef union {
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    struct {    /**< elf_backend members */
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        elf_header_t *elf;
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        elf_segment_header_t *segment;
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    };
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    struct {    /**< phys_backend members */
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    __native d1;
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        __address base;
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    __native d2;
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        count_t frames;
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    };
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} mem_backend_data_t;
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} mem_backend_data_t;
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/** Address space area structure.
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/** Address space area structure.
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 *
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 *
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 * Each as_area_t structure describes one contiguous area of virtual memory.
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 * Each as_area_t structure describes one contiguous area of virtual memory.