The-Homebrew-Cloud/skyline
2
0
Fork 0
mirror of https://github.com/skyline-emu/skyline.git synced 2024-06-01 12:18:49 +02:00
Code Issues Packages Projects Releases Wiki Activity

KProcess: Use process_{read, write}_vm to access guest memory

Browse Source 
This is much quicker than pread/write however we now need to abide by the
regions permissions, so fallback to pread/write if read/write vm fails.
This commit is contained in:
Billy Laws 2020-01-11 19:28:44 +00:00 committed by ◱ PixelyIon
parent 65018aedbc
commit 81dba3da4b
1 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
app/src/main/cpp/skyline/kernel/types/KProcess.cpp
View File

@ -3,6 +3,7 @@
#include <os.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/uio.h>
namespace skyline::kernel::type {
KProcess::TlsPage::TlsPage(u64 address) : address(address) {}
@ -89,11 +90,31 @@ namespace skyline::kernel::type {
}
void KProcess::ReadMemory(void *destination, u64 offset, size_t size) const {
pread64(memFd, destination, size, offset);
struct iovec local[1];
struct iovec remote[1];
remote[0].iov_base = reinterpret_cast<void*>(offset);
remote[0].iov_len = size;
local[0].iov_base = destination;
local[0].iov_len = size;
if (process_vm_readv(pid, local, 1, remote, 1, 0) < 0)
pread64(memFd, destination, size, offset);
}
void KProcess::WriteMemory(void *source, u64 offset, size_t size) const {
pwrite64(memFd, source, size, offset);
struct iovec local[1];
struct iovec remote[1];
remote[0].iov_base = reinterpret_cast<void*>(offset);
remote[0].iov_len = size;
local[0].iov_base = source;
local[0].iov_len = size;
if (process_vm_writev(pid, local, 1, remote, 1, 0) < 0)
pwrite64(memFd, source, size, offset);
}
KProcess::HandleOut<KPrivateMemory> KProcess::MapPrivateRegion(u64 address, size_t size, const memory::Permission perms, const memory::Type type, const memory::Region region) {