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668f623256
An exceptional signal handler allows us to convert an OS signal into a C++ exception, this allows us to alleviate a lot of crashes that would otherwise occur from signals being thrown during execution of games and be able to handle them gracefully.
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
// SPDX-License-Identifier: MPL-2.0
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// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
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#pragma once
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#include "common.h"
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#include <sys/wait.h>
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namespace skyline::nce {
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/**
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* @brief The NCE (Native Code Execution) class is responsible for managing state relevant to the layer between the host and guest
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*/
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class NCE {
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private:
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const DeviceState &state;
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static void SvcHandler(u16 svc, ThreadContext* ctx);
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public:
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static void SignalHandler(int signal, siginfo *info, ucontext *context, void *oldTls);
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NCE(const DeviceState &state);
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struct PatchData {
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size_t size; //!< Size of the .patch section
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std::vector<size_t> offsets; //!< Offsets in .text of instructions that need to be patched
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};
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static PatchData GetPatchData(const std::vector<u8> &text);
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/**
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* @brief Writes the .patch section and mutates the code accordingly
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* @param patch A pointer to the .patch section which should be exactly patchSize in size and located before the .text section
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*/
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static void PatchCode(std::vector<u8> &text, u32* patch, size_t patchSize, const std::vector<size_t>& offsets);
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};
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}
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