mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-10-31 11:15:51 +01:00
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <exosphere.hpp>
|
|
#include "fusee_loader_uncompress.hpp"
|
|
#include "program_lz4.h"
|
|
|
|
namespace ams::nxboot::loader {
|
|
|
|
namespace {
|
|
|
|
constexpr uintptr_t ProgramImageBase = 0x40001000;
|
|
constexpr uintptr_t ProgramImageEnd = 0x4003D000;
|
|
constexpr size_t ProgramImageSizeMax = ProgramImageEnd - ProgramImageBase;
|
|
|
|
void CopyBackwards(void *dst, const void *src, size_t size) {
|
|
u8 *dst_8 = static_cast<u8 *>(dst) + size;
|
|
const u8 *src_8 = static_cast<const u8 *>(src) + size;
|
|
|
|
for (size_t i = 0; i < size; ++i) {
|
|
*(--dst_8) = *(--src_8);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
NORETURN void UncompressAndExecute(const void *program, size_t program_size) {
|
|
/* Relocate the compressed binary to a place where we can safely decompress it. */
|
|
void *relocated_program = reinterpret_cast<void *>(ProgramImageEnd - program_size);
|
|
if (relocated_program != program) {
|
|
CopyBackwards(relocated_program, program, program_size);
|
|
}
|
|
|
|
/* Uncompress the program image. */
|
|
Uncompress(reinterpret_cast<void *>(ProgramImageBase), ProgramImageSizeMax, relocated_program, program_size);
|
|
|
|
/* Jump to the boot image. */
|
|
reinterpret_cast<void (*)()>(ProgramImageBase)();
|
|
|
|
/* We will never reach this point. */
|
|
__builtin_unreachable();
|
|
}
|
|
|
|
} |