91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/* XMRig
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* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
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* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
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* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
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* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
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* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
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* Copyright 2017-2018 XMR-Stak <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
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* Copyright 2018 Lee Clagett <https://github.com/vtnerd>
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* Copyright 2018-2019 SChernykh <https://github.com/SChernykh>
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* Copyright 2018-2019 tevador <tevador@gmail.com>
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* Copyright 2016-2019 XMRig <https://github.com/xmrig>, <support@xmrig.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <sys/mman.h>
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#include "crypto/common/VirtualMemory.h"
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#if defined(__APPLE__)
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# include <mach/vm_statistics.h>
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#endif
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void *xmrig::VirtualMemory::allocateExecutableMemory(size_t size)
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{
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# if defined(__APPLE__)
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void *mem = mmap(0, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
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# else
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void *mem = mmap(0, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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# endif
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return mem == MAP_FAILED ? nullptr : mem;
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}
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void *xmrig::VirtualMemory::allocateLargePagesMemory(size_t size)
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{
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# if defined(__APPLE__)
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void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
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# elif defined(__FreeBSD__)
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void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_ALIGNED_SUPER | MAP_PREFAULT_READ, -1, 0);
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# else
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void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0);
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# endif
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return mem == MAP_FAILED ? nullptr : mem;
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}
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void xmrig::VirtualMemory::flushInstructionCache(void *p, size_t size)
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{
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# ifdef HAVE_BUILTIN_CLEAR_CACHE
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__builtin___clear_cache(reinterpret_cast<char*>(p), reinterpret_cast<char*>(p) + size);
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# endif
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}
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void xmrig::VirtualMemory::freeLargePagesMemory(void *p, size_t size)
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{
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munmap(p, size);
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}
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void xmrig::VirtualMemory::protectExecutableMemory(void *p, size_t size)
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{
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mprotect(p, size, PROT_READ | PROT_EXEC);
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}
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void xmrig::VirtualMemory::unprotectExecutableMemory(void *p, size_t size)
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{
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mprotect(p, size, PROT_WRITE | PROT_EXEC);
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}
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