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[rpcsx-os] fork: implement vm and vfs fork

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stub metadbg device
implement notification device
implement sys_pipe
This commit is contained in:
DH 2023-10-31 21:28:40 +03:00
parent 39092c7f16
commit 525ef02e8a
22 changed files with 379 additions and 76 deletions
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39
rpcsx-os/vm.cpp
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@ -634,6 +634,45 @@ static void reserve(std::uint64_t startAddress, std::uint64_t endAddress) {
gBlocks[blockIndex - kFirstBlock].setFlags(firstPage, pagesCount, kAllocated);
}
void rx::vm::fork(std::uint64_t pid) {
gMemoryShm = ::shm_open(("/rpcsx-os-memory-" + std::to_string(pid)).c_str(),
O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
if (gMemoryShm == -1) {
std::fprintf(stderr, "Memory: failed to open /rpcsx-os-memory\n");
std::abort();
}
if (::ftruncate64(gMemoryShm, kMemorySize) < 0) {
std::fprintf(stderr, "Memory: failed to allocate /rpcsx-os-memory\n");
std::abort();
}
for (auto address = kMinAddress; address < kMaxAddress;
address += kPageSize) {
auto prot = gBlocks[(address >> kBlockShift) - kFirstBlock].getProtection(
(address & kBlockMask) >> rx::vm::kPageShift);
if (prot & kMapProtCpuAll) {
auto mapping = utils::map(nullptr, kPageSize, PROT_WRITE, MAP_SHARED,
gMemoryShm, address - kMinAddress);
assert(mapping != MAP_FAILED);
utils::protect(reinterpret_cast<void *>(address), kPageSize, PROT_READ);
std::memcpy(mapping, reinterpret_cast<void *>(address), kPageSize);
utils::unmap(mapping, kPageSize);
utils::unmap(reinterpret_cast<void *>(address), kPageSize);
mapping = utils::map(reinterpret_cast<void *>(address), kPageSize,
prot & kMapProtCpuAll, MAP_FIXED | MAP_SHARED,
gMemoryShm, address - kMinAddress);
assert(mapping != MAP_FAILED);
}
// TODO: copy gpu memory?
}
}
void rx::vm::initialize() {
std::printf("Memory: initialization\n");