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Optimize MMIO handling

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momo5502
2025-04-05 08:55:08 +02:00
parent b696117424
commit d191f8e667
7 changed files with 49 additions and 55 deletions
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29
src/icicle-emulator/icicle_x64_emulator.cpp
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@@ -12,8 +12,8 @@ extern "C"
using violation_func = int32_t(void*, uint64_t address, uint8_t operation, int32_t unmapped);
using data_accessor_func = void(void* user, const void* data, size_t length);
using icicle_mmio_read_func = void(void* user, uint64_t address, size_t length, void* data);
using icicle_mmio_write_func = void(void* user, uint64_t address, size_t length, const void* data);
using icicle_mmio_read_func = void(void* user, uint64_t address, void* data, size_t length);
using icicle_mmio_write_func = void(void* user, uint64_t address, const void* data, size_t length);
icicle_emulator* icicle_create_emulator();
int32_t icicle_protect_memory(icicle_emulator*, uint64_t address, uint64_t length, uint8_t permissions);
@@ -185,31 +185,14 @@ namespace icicle
auto* ptr = wrapper.get();
this->storage_.push_back(std::move(wrapper));
auto* read_wrapper = +[](void* user, const uint64_t addr, const size_t length, void* data) {
constexpr auto limit = sizeof(uint64_t);
auto* read_wrapper = +[](void* user, const uint64_t addr, void* data, const size_t length) {
const auto* w = static_cast<mmio_wrapper*>(user);
// TODO: Change interface to get rid of loop
for (size_t offset = 0; offset < length; offset += limit)
{
const auto max_read = std::min(limit, length - offset);
const auto value = w->read_cb(addr + offset - w->base, max_read);
memcpy(static_cast<uint8_t*>(data) + offset, &value, max_read);
}
w->read_cb(addr - w->base, data, length);
};
auto* write_wrapper = +[](void* user, const uint64_t addr, const size_t length, const void* data) {
constexpr auto limit = sizeof(uint64_t);
auto* write_wrapper = +[](void* user, const uint64_t addr, const void* data, const size_t length) {
const auto* w = static_cast<mmio_wrapper*>(user);
// TODO: Change interface to get rid of loop
for (size_t offset = 0; offset < length; offset += limit)
{
uint64_t value{};
const auto max_read = std::min(limit, length - offset);
memcpy(&value, static_cast<const uint8_t*>(data) + offset, max_read);
w->write_cb(addr + offset - w->base, max_read, value);
}
w->write_cb(addr + w->base, data, length);
};
icicle_map_mmio(this->emu_, address, size, read_wrapper, ptr, write_wrapper, ptr);