mirror of
https://github.com/lifting-bits/remill
synced 2026-06-21 13:56:07 +00:00
Peter Goodman
3808e9951d
* Refactors the code to improve directory layout, use more std::string_view in place of std::string, deletes some deprecated functions, deprecates some other functions for eventual deletion, and includes semantics for sparcv8 (sparc32) and sparcv9 (sparc64) * Update new dir layout with llvm 11 support * Whoops missing files * Drop llvm 800 from workflow * Minor fix * Move where the install directives are in CMake * Minor fixes * Rename tools/ to bin/. * Minor tweaks * Should fix issues
87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
/*
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* Copyright (c) 2017 Trail of Bits, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace {
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template <typename T>
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DEF_SEM(JMP, T target_pc, IF_32BIT_ELSE(R32W, R64W) pc_dst) {
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auto new_pc = Read(target_pc);
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WriteZExt(REG_PC, new_pc);
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WriteZExt(pc_dst, new_pc);
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return memory;
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}
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template <typename T>
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DEF_SEM(JMP_FAR_MEM, T target_seg_pc, IF_32BIT_ELSE(R32W, R64W) pc_dst) {
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HYPER_CALL = AsyncHyperCall::kX86JmpFar;
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uint64_t target_fword = UShr(UShl(Read(target_seg_pc), 0xf), 0xf);
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auto pc = static_cast<uint32_t>(target_fword);
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auto seg = static_cast<uint16_t>(UShr(target_fword, 32));
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WriteZExt(REG_PC, pc);
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WriteZExt(pc_dst, pc);
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Write(REG_CS.flat, seg);
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// TODO(tathanhdinh): Update the hidden part (segment shadow) of CS,
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// see Issue #334
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return memory;
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}
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template <typename S1, typename S2>
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DEF_SEM(JMP_FAR_PTR, S1 src1, S2 src2, IF_32BIT_ELSE(R32W, R64W) pc_dst) {
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HYPER_CALL = AsyncHyperCall::kX86JmpFar;
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auto pc = Read(src1);
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auto seg = Read(src2);
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WriteZExt(REG_PC, pc);
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WriteZExt(pc_dst, pc);
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Write(REG_CS.flat, seg);
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// TODO(tathanhdinh): Update the hidden part (segment shadow) of CS,
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// see Issue #334
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return memory;
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}
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} // namespace
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DEF_ISEL(JMP_RELBRd) = JMP<PC>;
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DEF_ISEL(JMP_RELBRb) = JMP<PC>;
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DEF_ISEL_32or64(JMP_RELBRz, JMP<PC>);
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#if 64 == ADDRESS_SIZE_BITS
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DEF_ISEL(JMP_MEMv_64) = JMP<M64>;
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DEF_ISEL(JMP_GPRv_64) = JMP<R64>;
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DEF_ISEL(JMP_FAR_MEMp2_32) = JMP_FAR_MEM<M64>;
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#else
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DEF_ISEL(JMP_MEMv_16) = JMP<M16>;
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DEF_ISEL(JMP_MEMv_32) = JMP<M32>;
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DEF_ISEL(JMP_GPRv_16) = JMP<R16>;
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DEF_ISEL(JMP_GPRv_32) = JMP<R32>;
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DEF_ISEL(JMP_FAR_MEMp2_32) = JMP_FAR_MEM<M32>;
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DEF_ISEL(JMP_FAR_PTRp_IMMw_32) = JMP_FAR_PTR<I32, I16>;
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DEF_ISEL(JMP_FAR_PTRp_IMMw_16) = JMP_FAR_PTR<I16, I16>;
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#endif
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/*
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1807 JMP_FAR JMP_FAR_MEMp2 UNCOND_BR BASE I86 ATTRIBUTES: FAR_XFER NOTSX SCALABLE
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1808 JMP_FAR JMP_FAR_PTRp_IMMw UNCOND_BR BASE I86 ATTRIBUTES: FAR_XFER NOTSX SCALABLE
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*/
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