19e0578474
This fixes a GCC warning: "warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]" Change-Id: I4f079b239adeb9d3c2ac2daaa2a1333d20046505
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
#include "BochsCPU.hpp"
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#include "../SALConfig.hpp"
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#include <cassert>
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namespace fail {
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regdata_t BochsCPU::getRegisterContent(Register* reg) const
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{
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assert(reg != NULL && "FATAL ERROR: reg-ptr cannot be NULL!");
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// TODO: BX_CPU(0) *always* correct?
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if (reg->getId() == RID_FLAGS) // EFLAGS register?
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return static_cast<regdata_t>(BX_CPU(id)->eflags);
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#ifdef SIM_SUPPORT_64
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if (reg->getId() == RID_PC) // program counter?
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return static_cast<regdata_t>(BX_CPU(id)->gen_reg[BX_64BIT_REG_RIP].rrx);
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else // 64 bit general purpose registers
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return static_cast<regdata_t>(BX_CPU(id)->gen_reg[reg->getId()].rrx);
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#else // 32 bit mode
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if (reg->getId() == RID_PC)
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return static_cast<regdata_t>(BX_CPU(id)->gen_reg[BX_32BIT_REG_EIP].dword.erx);
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else // 32 bit general purpose registers
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return static_cast<regdata_t>(BX_CPU(id)->gen_reg[reg->getId()].dword.erx);
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#endif // SIM_SUPPORT_64
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}
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void BochsCPU::setRegisterContent(Register* reg, regdata_t value)
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{
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assert(reg != NULL && "FATAL ERROR: reg-ptr cannot be NULL!");
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// TODO: BX_CPU(0) *always* correct?
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if (reg->getId() == RID_FLAGS) { // EFLAGS register?
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regdata_t* pData = reinterpret_cast<regdata_t*>(&(BX_CPU(id)->eflags));
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#ifdef SIM_SUPPORT_64
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// We are in 64 bit mode: Just assign the lower 32 bits!
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*pData = ((*pData) & 0xFFFFFFFF00000000ULL) | (value & 0xFFFFFFFFULL);
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#else
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*pData = value;
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#endif
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return;
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}
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regdata_t* pData;
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#ifdef SIM_SUPPORT_64
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if (reg->getId() == RID_PC) // program counter?
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pData = &(BX_CPU(id)->gen_reg[BX_64BIT_REG_RIP].rrx);
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else // 64 bit general purpose registers
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pData = &(BX_CPU(id)->gen_reg[reg->getId()].rrx);
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#else // 32 bit mode
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if (reg->getId() == RID_PC)
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pData = &(BX_CPU(id)->gen_reg[BX_32BIT_REG_EIP].dword.erx);
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else // 32 bit general purpose registers
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pData = &(BX_CPU(id)->gen_reg[reg->getId()].dword.erx);
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#endif // SIM_SUPPORT_64
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*pData = value;
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}
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} // end-of-namespace: fail
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