bb11ee6d9c
To enable experiments with non-4KiB page sizes, introduce
an inline page_size() function that will either return the runtime
page size (if PAGE_SIZE is not 4096) or a constant 4096 (elsewhere).
This should ensure that there are no changes to the generated code on
unaffected platforms.
Test: source build/envsetup.sh
lunch aosp_cf_arm64_16k_phone-userdebug
m -j32 installclean
m -j32
Test: launch_cvd \
-kernel_path /path/to/out/android14-5.15/dist/Image \
-initramfs_path /path/to/out/android14-5.15/dist/initramfs.img \
-userdata_format=ext4
Bug: 277272383
Bug: 230790254
Change-Id: Ic0ed98b67f7c6b845804b90a4e16649f2fc94028
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "linker_mapped_file_fragment.h"
|
|
#include "linker_debug.h"
|
|
#include "linker_utils.h"
|
|
#include "platform/bionic/page.h"
|
|
|
|
#include <inttypes.h>
|
|
#include <stdlib.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
|
|
MappedFileFragment::MappedFileFragment() : map_start_(nullptr), map_size_(0),
|
|
data_(nullptr), size_ (0)
|
|
{ }
|
|
|
|
MappedFileFragment::~MappedFileFragment() {
|
|
if (map_start_ != nullptr) {
|
|
munmap(map_start_, map_size_);
|
|
}
|
|
}
|
|
|
|
bool MappedFileFragment::Map(int fd, off64_t base_offset, size_t elf_offset, size_t size) {
|
|
off64_t offset;
|
|
CHECK(safe_add(&offset, base_offset, elf_offset));
|
|
|
|
off64_t page_min = page_start(offset);
|
|
off64_t end_offset;
|
|
|
|
CHECK(safe_add(&end_offset, offset, size));
|
|
CHECK(safe_add(&end_offset, end_offset, page_offset(offset)));
|
|
|
|
size_t map_size = static_cast<size_t>(end_offset - page_min);
|
|
CHECK(map_size >= size);
|
|
|
|
uint8_t* map_start = static_cast<uint8_t*>(
|
|
mmap64(nullptr, map_size, PROT_READ, MAP_PRIVATE, fd, page_min));
|
|
|
|
if (map_start == MAP_FAILED) {
|
|
return false;
|
|
}
|
|
|
|
map_start_ = map_start;
|
|
map_size_ = map_size;
|
|
|
|
data_ = map_start + page_offset(offset);
|
|
size_ = size;
|
|
|
|
return true;
|
|
}
|