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[rpcsx-os] vm: add getPageProtection api

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This commit is contained in:
DH 2023-07-19 15:00:58 +03:00
parent 1d55e83965
commit 31fd85ce1d
2 changed files with 36 additions and 1 deletions
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36
rpcsx-os/vm.cpp
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@ -307,6 +307,28 @@ struct Block {
modifyFlags(firstPage, pagesCount, 0, flags);
}
unsigned getProtection(std::uint64_t page) const {
std::uint64_t groupIndex = page / kGroupSize;
auto mask = makePagesMask(page & kGroupMask, 1);
auto &group = groups[groupIndex];
if ((group.allocated & mask) == 0) {
return 0;
}
unsigned result = 0;
result |= (group.readable & mask) == mask ? kReadable : 0;
result |= (group.writable & mask) == mask ? kReadable | kWritable : 0;
result |= (group.executable & mask) == mask ? kReadable | kExecutable : 0;
result |= (group.gpuReadable & mask) == mask ? kGpuReadable : 0;
result |= (group.gpuWritable & mask) == mask ? kGpuWritable : 0;
return result;
}
void modifyFlags(std::uint64_t firstPage, std::uint64_t pagesCount,
std::uint32_t addFlags, std::uint32_t removeFlags) {
std::uint64_t groupIndex = firstPage / kGroupSize;
@ -344,7 +366,7 @@ struct Block {
count = pagesCount;
}
auto mask = makePagesMask(firstPage, count);
auto mask = makePagesMask(firstPage & kGroupMask, count);
pagesCount -= count;
auto &group = groups[groupIndex++];
@ -893,6 +915,18 @@ bool rx::vm::queryProtection(const void *addr, std::uint64_t *startAddress,
return false;
}
unsigned rx::vm::getPageProtection(std::uint64_t address) {
if (address < kMinAddress || address >= kMaxAddress) {
std::printf("Memory error: getPageProtection out of memory\n");
return 0;
}
std::lock_guard lock(g_mtx);
return gBlocks[(address >> kBlockShift) - kFirstBlock].getProtection(
(address & kBlockMask) >> kPageShift);
}
bool rx::vm::virtualQuery(const void *addr, std::int32_t flags,
VirtualQueryInfo *info) {
std::lock_guard lock(g_mtx);

1
rpcsx-os/vm.hpp
View file

@ -76,4 +76,5 @@ bool protect(void *addr, std::uint64_t size, std::int32_t prot);
bool virtualQuery(const void *addr, std::int32_t flags, VirtualQueryInfo *info);
bool queryProtection(const void *addr, std::uint64_t *startAddress,
std::uint64_t *endAddress, std::int64_t *prot);
unsigned getPageProtection(std::uint64_t address);
} // namespace rx::vm