2009-11-16 00:40:09 +00:00
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/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2009 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../PrecompiledHeader.h"
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#include <sys/mman.h>
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#include <signal.h>
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namespace HostSys
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{
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static const uptr m_pagemask = getpagesize()-1;
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void *Mmap(uptr base, u32 size)
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{
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u8 *Mem;
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Mem = (u8*)mmap((uptr*)base, size, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
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if (Mem == MAP_FAILED) Console.Warning("Mmap Failed!");
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return Mem;
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}
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void Munmap(uptr base, u32 size)
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{
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munmap((uptr*)base, size);
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}
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void MemProtect( void* baseaddr, size_t size, PageProtectionMode mode, bool allowExecution )
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{
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pxAssertDev( (size & (__pagesize-1)) == 0, wxsFormat(
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L"Memory block size must be a multiple of the target platform's page size.\n"
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L"\tPage Size: 0x%04x (%d), Block Size: 0x%04x (%d)",
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__pagesize, __pagesize, size, size )
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);
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int lnxmode = 0;
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// make sure size is aligned to the system page size:
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// Check is redundant against the assertion above, but might as well...
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size = (size + m_pagemask) & ~m_pagemask;
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switch( mode )
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{
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case Protect_NoAccess: break;
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case Protect_ReadOnly: lnxmode = PROT_READ; break;
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case Protect_ReadWrite: lnxmode = PROT_READ | PROT_WRITE; break;
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}
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if( allowExecution ) lnxmode |= PROT_EXEC;
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mprotect( baseaddr, size, lnxmode );
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}
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}
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