izzy/dolphin
0
0
Fork 0
mirror of https://github.com/izzy2lost/dolphin.git synced 2026-06-19 01:16:48 -07:00
Code Issues Packages Projects Releases Wiki Activity

Core: Don't create page table mappings before R/C bits are set

Browse Source 
This gets rid of the hack of setting the R and C bits pessimistically,
reversing the performance regression in Rogue Squadron 3.
This commit is contained in:
JosJuice
2026-02-04 21:35:22 +01:00
parent 9462e9d890
commit 0ce95299f6
9 changed files with 197 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Source/Core/Common/MemArenaUnix.cpp
+18 -2
View File
@@ -87,9 +87,13 @@ void MemArena::ReleaseMemoryRegion()
}
}
void* MemArena::MapInMemoryRegion(s64 offset, size_t size, void* base)
void* MemArena::MapInMemoryRegion(s64 offset, size_t size, void* base, bool writeable)
{
void* retval = mmap(base, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, m_shm_fd, offset);
int prot = PROT_READ;
if (writeable)
prot |= PROT_WRITE;
void* retval = mmap(base, size, prot, MAP_SHARED | MAP_FIXED, m_shm_fd, offset);
if (retval == MAP_FAILED)
{
NOTICE_LOG_FMT(MEMMAP, "mmap failed");
@@ -101,6 +105,18 @@ void* MemArena::MapInMemoryRegion(s64 offset, size_t size, void* base)
}
}
bool MemArena::ChangeMappingProtection(void* view, size_t size, bool writeable)
{
int prot = PROT_READ;
if (writeable)
prot |= PROT_WRITE;
int retval = mprotect(view, size, prot);
if (retval != 0)
NOTICE_LOG_FMT(MEMMAP, "mprotect failed");
return retval == 0;
}
void MemArena::UnmapFromMemoryRegion(void* view, size_t size)
{
void* retval = mmap(view, size, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);