minix/include/sys/mman.h
Ben Gras 769af57274 further libexec generalization
. new mode for sys_memset: include process so memset can be
	  done in physical or virtual address space.
	. add a mode to mmap() that lets a process allocate uninitialized
	  memory.
	. this allows an exec()er (RS, VFS, etc.) to request uninitialized
	  memory from VM and selectively clear the ranges that don't come
	  from a file, leaving no uninitialized memory left for the process
	  to see.
	. use callbacks for clearing the process, clearing memory in the
	  process, and copying into the process; so that the libexec code
	  can be used from rs, vfs, and in the future, kernel (to load vm)
	  and vm (to load boot-time processes)
2012-06-07 15:15:02 +02:00

88 lines
2.3 KiB
C

#ifndef _SYS_MMAN_H_
#define _SYS_MMAN_H_
#include <sys/featuretest.h>
#include <machine/ansi.h>
#include <minix/type.h>
#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
#endif
#include <sys/ansi.h>
#ifndef mode_t
typedef __mode_t mode_t;
#define mode_t __mode_t
#endif
#ifndef off_t
typedef __off_t off_t; /* file offset */
#define off_t __off_t
#endif
/*
* Protections are chosen from these bits, or-ed together
*/
#define PROT_NONE 0x00 /* no permissions */
#define PROT_READ 0x01 /* pages can be read */
#define PROT_WRITE 0x02 /* pages can be written */
#define PROT_EXEC 0x04 /* pages can be executed */
/*
* Flags contain sharing type and options.
* Sharing types; choose one.
*/
#ifndef __minix
#define MAP_SHARED 0x0001 /* share changes */
#endif
#define MAP_PRIVATE 0x0002 /* changes are private */
/*
* Mapping type
*/
#define MAP_ANON 0x0004 /* anonymous memory */
/*
* Minix specific flags.
*/
#define MAP_PREALLOC 0x0008 /* not on-demand */
#define MAP_CONTIG 0x0010 /* contiguous in physical memory */
#define MAP_LOWER16M 0x0020 /* physically below 16MB */
#define MAP_ALIGN64K 0x0040 /* physically aligned at 64kB */
#define MAP_LOWER1M 0x0080 /* physically below 16MB */
#define MAP_ALIGNMENT_64KB MAP_ALIGN64K
#define MAP_IPC_SHARED 0x0100 /* share changes */
#define MAP_FIXED 0x0200 /* require mapping to happen at hint */
#define MAP_THIRDPARTY 0x0400 /* perform on behalf of any process */
#define MAP_UNINITIALIZED 0x0800 /* do not clear memory */
/*
* Error indicator returned by mmap(2)
*/
#define MAP_FAILED ((void *) -1) /* mmap() failed */
#include <sys/cdefs.h>
__BEGIN_DECLS
#ifndef __minix
void * mmap(void *, size_t, int, int, int, off_t);
int munmap(void *, size_t);
#else
void * minix_mmap(void *, size_t, int, int, int, off_t);
void * minix_mmap_for(endpoint_t, void *, size_t, int, int, int, off_t);
int minix_munmap(void *, size_t);
int minix_munmap_text(void *, size_t);
void * vm_remap(int d, int s, void *da, void *sa, size_t si);
void * vm_remap_ro(int d, int s, void *da, void *sa, size_t si);
int vm_unmap(int endpt, void *addr);
unsigned long vm_getphys(int endpt, void *addr);
u8_t vm_getrefcount(int endpt, void *addr);
#endif /* __minix */
__END_DECLS
#endif /* !_SYS_MMAN_H_ */