mirrors/rpcs3
1
0
Fork 0
mirror of https://github.com/RPCS3/rpcs3.git synced 2025-04-20 11:36:13 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

vm_native.cpp: implement shm::try_map

Browse source 
Treats addr as a hint, emulating windows behaviour.
This commit is contained in:
Nekotekina 2021-01-25 16:55:19 +03:00
parent 486d48e4f8
commit caa83d20f7
2 changed files with 25 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
rpcs3/util/vm.hpp
View file

@ -67,6 +67,9 @@ namespace utils
// Map shared memory
u8* map(void* ptr, protection prot = protection::rw) const;
// Attempt to map shared memory fix fixed pointer
u8* try_map(void* ptr, protection prot = protection::rw) const;
// Map shared memory over reserved memory region, which is unsafe (non-atomic) under Win32
u8* map_critical(void* ptr, protection prot = protection::rw);

25
rpcs3/util/vm_native.cpp
View file

@ -120,7 +120,7 @@ namespace utils
auto ptr = ::mmap(use_addr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE | c_map_noreserve, -1, 0);
if (ptr == reinterpret_cast<void*>(-1))
if (ptr == reinterpret_cast<void*>(UINT64_MAX))
{
return nullptr;
}
@ -179,7 +179,7 @@ namespace utils
ensure(::VirtualFree(pointer, size, MEM_DECOMMIT));
#else
const u64 ptr64 = reinterpret_cast<u64>(pointer);
ensure(::mmap(pointer, size, PROT_NONE, MAP_FIXED | MAP_ANON | MAP_PRIVATE | c_map_noreserve, -1, 0) != reinterpret_cast<void*>(-1));
ensure(::mmap(pointer, size, PROT_NONE, MAP_FIXED | MAP_ANON | MAP_PRIVATE | c_map_noreserve, -1, 0) != reinterpret_cast<void*>(UINT64_MAX));
if constexpr (c_madv_no_dump != 0)
{
@ -195,7 +195,7 @@ namespace utils
memory_commit(pointer, size, prot);
#else
const u64 ptr64 = reinterpret_cast<u64>(pointer);
ensure(::mmap(pointer, size, +prot, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0) != reinterpret_cast<void*>(-1));
ensure(::mmap(pointer, size, +prot, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0) != reinterpret_cast<void*>(UINT64_MAX));
if constexpr (c_madv_hugepage != 0)
{
@ -376,6 +376,25 @@ namespace utils
#endif
}
u8* shm::try_map(void* ptr, protection prot) const
{
// Non-null pointer shall be specified
const auto target = ensure(reinterpret_cast<u8*>(reinterpret_cast<u64>(ptr) & -0x10000));
#ifdef _WIN32
return this->map(target, prot);
#else
const auto result = reinterpret_cast<u8*>(::mmap(reinterpret_cast<void*>(target), m_size, +prot, MAP_SHARED, m_file, 0));
if (result == reinterpret_cast<void*>(UINT64_MAX))
{
[[unlikely]] return nullptr;
}
return result;
#endif
}
u8* shm::map_critical(void* ptr, protection prot)
{
const auto target = reinterpret_cast<u8*>(reinterpret_cast<u64>(ptr) & -0x10000);