src/arch/arm/linux/se_workload.hh

/*
 * Copyright 2020 Google Inc.
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 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
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#ifndef __ARCH_ARM_LINUX_SE_WORKLOAD_HH__
#define __ARCH_ARM_LINUX_SE_WORKLOAD_HH__

#include "arch/arm/linux/linux.hh"
#include "arch/arm/regs/int.hh"
#include "arch/arm/se_workload.hh"
#include "params/ArmEmuLinux.hh"
#include "sim/syscall_desc.hh"

namespace gem5
{

namespace ArmISA
{

class EmuLinux : public SEWorkload
{
  public:
    using Params = ArmEmuLinuxParams;

    EmuLinux(const Params &p) : SEWorkload(p) {}

    struct BaseSyscallABI {};
    struct SyscallABI32 : public SEWorkload::SyscallABI32,
                          public BaseSyscallABI
    {};
    struct SyscallABI64 : public SEWorkload::SyscallABI64,
                          public BaseSyscallABI
    {};

    void syscall(ThreadContext *tc) override;
};

} // namespace ArmISA

GEM5_DEPRECATED_NAMESPACE(GuestABI, guest_abi);
namespace guest_abi
{

template <typename ABI>
struct Result<ABI, SyscallReturn,
    typename std::enable_if_t<std::is_base_of<
        ArmISA::EmuLinux::BaseSyscallABI, ABI>::value>>
{
    static void
    store(ThreadContext *tc, const SyscallReturn &ret)
    {
        if (ret.suppressed() || ret.needsRetry())
            return;

        tc->setIntReg(ArmISA::ReturnValueReg, ret.encodedValue());
        if (ret.count() > 1)
            tc->setIntReg(ArmISA::SyscallPseudoReturnReg, ret.value2());
    }
};

} // namespace guest_abi
} // namespace gem5

#endif // __ARCH_ARM_LINUX_SE_WORKLOAD_HH__