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* Added <sys/mman.h> header. It declares only mmap() and munmap() yet

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and defines the macros needed by them.
* Renamed syscall sys_vm_map_file() to _kern_map_file() and changed the
  path to an FD parameter. Changed vm_map_file() accordingly and
  adjusted the kernel ELF loader and the runtime loader.
* Added syscall _kern_unmap_memory().
* Added bool unmapAddressRange parameter to vm_create_anonymous_area()
  and map_backing_store(). If true and the address specification is
  B_EXACT_ADDRESS, all areas in the specified address range will be
  deleted (unless an area is covered only partially).
* Introduced B_SHARED_AREA flag, which is set on areas that have been
  created by {vm,_user}_map_file() with REGION_NO_PRIVATE_MAP. When
  fork()ing those areas won't be copied CoW, but rather be cloned. This
  is needed for mmap() MAP_SHARED.
* {vm,_user}_map_file() also accept an FD argument < 0, in which case an
  anonymous area is created.
* Implemented mmap() and munmap(). Currently there's the restriction
  that we can't partially unmap areas. Otherwise the functions should be
  rather compliant. We also support the non-POSIX extension
  MAP_ANONYMOUS.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24964 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2008-04-13 22:52:11 +00:00
parent 34cbfd39d3
commit 3cf7ecd1e4
8 changed files with 289 additions and 61 deletions
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src/system/kernel/elf.cpp
+2 -2
View File
@@ -1406,7 +1406,7 @@ elf_load_user_image(const char *path, struct team *team, int flags, addr_t *entr
B_EXACT_ADDRESS,
fileUpperBound,
B_READ_AREA | B_WRITE_AREA, REGION_PRIVATE_MAP,
path, ROUNDOWN(programHeaders[i].p_offset, B_PAGE_SIZE));
fd, ROUNDOWN(programHeaders[i].p_offset, B_PAGE_SIZE));
if (id < B_OK) {
dprintf("error mapping file data: %s!\n", strerror(id));
status = B_NOT_AN_EXECUTABLE;
@@ -1453,7 +1453,7 @@ elf_load_user_image(const char *path, struct team *team, int flags, addr_t *entr
B_EXACT_ADDRESS,
ROUNDUP(programHeaders[i].p_memsz + (programHeaders[i].p_vaddr % B_PAGE_SIZE), B_PAGE_SIZE),
B_READ_AREA | B_EXECUTE_AREA, REGION_PRIVATE_MAP,
path, ROUNDOWN(programHeaders[i].p_offset, B_PAGE_SIZE));
fd, ROUNDOWN(programHeaders[i].p_offset, B_PAGE_SIZE));
if (id < B_OK) {
dprintf("error mapping file text: %s!\n", strerror(id));
status = B_NOT_AN_EXECUTABLE;