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// SPDX-License-Identifier: BSD-2-Clause
// Copyright © 2021 Billy Laws
#include <string>
#include <string_view>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <android/api-level.h>
#include <android/log.h>
#include <android_linker_ns.h>
#include "hook/kgsl.h"
#include "hook/hook_impl_params.h"
#include <adrenotools/driver.h>
#include <unistd.h>
void *adrenotools_open_libvulkan(int dlopenFlags, int featureFlags, const char *tmpLibDir, const char *hookLibDir, const char *customDriverDir, const char *customDriverName, const char *fileRedirectDir, void **userMappingHandle) {
// Bail out if linkernsbypass failed to load, this probably means we're on api < 28
if (!linkernsbypass_load_status())
return nullptr;
// Always use memfd on Q+ since it's guaranteed to work
if (android_get_device_api_level() >= 29)
tmpLibDir = nullptr;
// Verify that params for specific features are only passed if they are enabled
if (!(featureFlags & ADRENOTOOLS_DRIVER_FILE_REDIRECT) && fileRedirectDir)
return nullptr;
if (!(featureFlags & ADRENOTOOLS_DRIVER_CUSTOM) && (customDriverDir || customDriverName))
return nullptr;
if (!(featureFlags & ADRENOTOOLS_DRIVER_GPU_MAPPING_IMPORT) && userMappingHandle)
return nullptr;
// Verify that params for enabled features are correct
struct stat buf{};
if (featureFlags & ADRENOTOOLS_DRIVER_CUSTOM) {
if (!customDriverName || !customDriverDir)
return nullptr;
if (stat((std::string(customDriverDir) + customDriverName).c_str(), &buf) != 0)
return nullptr;
}
// Verify that params for enabled features are correct
if (featureFlags & ADRENOTOOLS_DRIVER_FILE_REDIRECT) {
if (!fileRedirectDir)
return nullptr;
if (stat(fileRedirectDir, &buf) != 0)
return nullptr;
}
// Create a namespace that can isolate our hook from the classloader namespace
auto hookNs{android_create_namespace("adrenotools-libvulkan", hookLibDir, nullptr, ANDROID_NAMESPACE_TYPE_SHARED, nullptr, nullptr)};
// Link it to the default namespace so the hook can use libandroid etc
if (!linkernsbypass_link_namespace_to_default_all_libs(hookNs))
return nullptr;
// Preload the hook implementation, otherwise we get a weird issue where despite being in NEEDED of the hook lib the hook's symbols will overwrite ours and cause an infinite loop
auto hookImpl{linkernsbypass_namespace_dlopen("libhook_impl.so", RTLD_NOW, hookNs)};
if (!hookImpl)
return nullptr;
// Pass parameters to the hook implementation
auto initHookParam{reinterpret_cast<void (*)(const void *)>(dlsym(hookImpl, "init_hook_param"))};
if (!initHookParam)
return nullptr;
auto importMapping{[&]() -> adrenotools_gpu_mapping * {
if (featureFlags & ADRENOTOOLS_DRIVER_GPU_MAPPING_IMPORT) {
// This will be leaked, but it's not a big deal since it's only a few bytes
adrenotools_gpu_mapping *mapping{new adrenotools_gpu_mapping{}};
*userMappingHandle = mapping;
return mapping;
} else {
return nullptr;
}
}()};
initHookParam(new HookImplParams(featureFlags, tmpLibDir, hookLibDir, customDriverDir, customDriverName, fileRedirectDir, importMapping));
// Load the libvulkan hook into the isolated namespace
if (!linkernsbypass_namespace_dlopen("libmain_hook.so", RTLD_GLOBAL, hookNs))
return nullptr;
return linkernsbypass_namespace_dlopen_unique("/system/lib64/libvulkan.so", tmpLibDir, dlopenFlags, hookNs);
}
bool adrenotools_import_user_mem(void *handle, void *hostPtr, uint64_t size) {
auto importMapping{reinterpret_cast<adrenotools_gpu_mapping *>(handle)};
kgsl_gpuobj_import_useraddr addr{
.virtaddr = reinterpret_cast<uint64_t>(hostPtr),
};
kgsl_gpuobj_import userMemImport{
.priv = reinterpret_cast<uint64_t>(&addr),
.priv_len = size,
.flags = KGSL_CACHEMODE_WRITEBACK << KGSL_CACHEMODE_SHIFT | KGSL_MEMFLAGS_IOCOHERENT,
.type = KGSL_USER_MEM_TYPE_ADDR,
};
kgsl_gpuobj_info info{};
int kgslFd{open("/dev/kgsl-3d0", O_RDWR)};
if (kgslFd < 0)
return false;
int ret{ioctl(kgslFd, IOCTL_KGSL_GPUOBJ_IMPORT, &userMemImport)};
if (ret)
goto err;
info.id = userMemImport.id;
ret = ioctl(kgslFd, IOCTL_KGSL_GPUOBJ_INFO, &info);
if (ret)
goto err;
importMapping->host_ptr = hostPtr;
importMapping->gpu_addr = info.gpuaddr;
importMapping->size = size;
importMapping->flags = 0xc2600; //!< Unknown flags, but they are required for the mapping to work
close(kgslFd);
return true;
err:
close(kgslFd);
return false;
}
bool adrenotools_mem_gpu_allocate(void *handle, uint64_t *size) {
auto mapping{reinterpret_cast<adrenotools_gpu_mapping *>(handle)};
kgsl_gpuobj_alloc gpuobjAlloc{
.size = *size,
.flags = KGSL_CACHEMODE_WRITEBACK << KGSL_CACHEMODE_SHIFT | KGSL_MEMFLAGS_IOCOHERENT,
};
kgsl_gpuobj_info info{};
int kgslFd{open("/dev/kgsl-3d0", O_RDWR)};
if (kgslFd < 0)
return false;
int ret{ioctl(kgslFd, IOCTL_KGSL_GPUOBJ_ALLOC, &gpuobjAlloc)};
if (ret)
goto err;
*size = gpuobjAlloc.mmapsize;
info.id = gpuobjAlloc.id;
ret = ioctl(kgslFd, IOCTL_KGSL_GPUOBJ_INFO, &info);
if (ret)
goto err;
mapping->host_ptr = nullptr;
mapping->gpu_addr = info.gpuaddr;
mapping->size = *size;
mapping->flags = 0xc2600; //!< Unknown flags, but they are required for the mapping to work
close(kgslFd);
return true;
err:
close(kgslFd);
return false;
}
bool adrenotools_mem_cpu_map(void *handle, void *hostPtr, uint64_t size) {
auto mapping{reinterpret_cast<adrenotools_gpu_mapping *>(handle)};
int kgslFd{open("/dev/kgsl-3d0", O_RDWR)};
if (kgslFd < 0)
return false;
mapping->host_ptr = mmap(hostPtr, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, kgslFd, mapping->gpu_addr);
close(kgslFd);
return mapping->host_ptr != nullptr;
}
bool adrenotools_validate_gpu_mapping(void *handle) {
auto importMapping{reinterpret_cast<adrenotools_gpu_mapping *>(handle)};
return importMapping->gpu_addr == ADRENOTOOLS_GPU_MAPPING_SUCCEEDED_MAGIC;
}
void adrenotools_set_turbo(bool turbo) {
uint32_t enable{turbo ? 0U : 1U};
kgsl_device_getproperty prop{
.type = KGSL_PROP_PWRCTRL,
.value = reinterpret_cast<void *>(&enable),
.sizebytes = sizeof(enable),
};
int kgslFd{open("/dev/kgsl-3d0", O_RDWR)};
if (kgslFd < 0)
return;
ioctl(kgslFd, IOCTL_KGSL_SETPROPERTY, &prop);
close (kgslFd);
}
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