//===-- ABISysV_x86_64.cpp --------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "ABISysV_x86_64.h" // C Includes // C++ Includes // Other libraries and framework includes #include "llvm/ADT/STLExtras.h" #include "llvm/ADT/Triple.h" // Project includes #include "lldb/Core/Module.h" #include "lldb/Core/PluginManager.h" #include "lldb/Core/RegisterValue.h" #include "lldb/Core/Value.h" #include "lldb/Core/ValueObjectConstResult.h" #include "lldb/Core/ValueObjectMemory.h" #include "lldb/Core/ValueObjectRegister.h" #include "lldb/Symbol/UnwindPlan.h" #include "lldb/Target/Process.h" #include "lldb/Target/RegisterContext.h" #include "lldb/Target/StackFrame.h" #include "lldb/Target/Target.h" #include "lldb/Target/Thread.h" #include "lldb/Utility/ConstString.h" #include "lldb/Utility/DataExtractor.h" #include "lldb/Utility/Log.h" #include "lldb/Utility/Status.h" using namespace lldb; using namespace lldb_private; enum dwarf_regnums { dwarf_rax = 0, dwarf_rdx, dwarf_rcx, dwarf_rbx, dwarf_rsi, dwarf_rdi, dwarf_rbp, dwarf_rsp, dwarf_r8, dwarf_r9, dwarf_r10, dwarf_r11, dwarf_r12, dwarf_r13, dwarf_r14, dwarf_r15, dwarf_rip, dwarf_xmm0, dwarf_xmm1, dwarf_xmm2, dwarf_xmm3, dwarf_xmm4, dwarf_xmm5, dwarf_xmm6, dwarf_xmm7, dwarf_xmm8, dwarf_xmm9, dwarf_xmm10, dwarf_xmm11, dwarf_xmm12, dwarf_xmm13, dwarf_xmm14, dwarf_xmm15, dwarf_stmm0, dwarf_stmm1, dwarf_stmm2, dwarf_stmm3, dwarf_stmm4, dwarf_stmm5, dwarf_stmm6, dwarf_stmm7, dwarf_ymm0, dwarf_ymm1, dwarf_ymm2, dwarf_ymm3, dwarf_ymm4, dwarf_ymm5, dwarf_ymm6, dwarf_ymm7, dwarf_ymm8, dwarf_ymm9, dwarf_ymm10, dwarf_ymm11, dwarf_ymm12, dwarf_ymm13, dwarf_ymm14, dwarf_ymm15, dwarf_bnd0 = 126, dwarf_bnd1, dwarf_bnd2, dwarf_bnd3 }; static RegisterInfo g_register_infos[] = { // NAME ALT SZ OFF ENCODING FORMAT EH_FRAME // DWARF GENERIC PROCESS PLUGIN // LLDB NATIVE // ======== ======= == === ============= =================== // ======================= ===================== // =========================== ===================== ====================== {"rax", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_rax, dwarf_rax, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rbx", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_rbx, dwarf_rbx, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rcx", "arg4", 8, 0, eEncodingUint, eFormatHex, {dwarf_rcx, dwarf_rcx, LLDB_REGNUM_GENERIC_ARG4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rdx", "arg3", 8, 0, eEncodingUint, eFormatHex, {dwarf_rdx, dwarf_rdx, LLDB_REGNUM_GENERIC_ARG3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rsi", "arg2", 8, 0, eEncodingUint, eFormatHex, {dwarf_rsi, dwarf_rsi, LLDB_REGNUM_GENERIC_ARG2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rdi", "arg1", 8, 0, eEncodingUint, eFormatHex, {dwarf_rdi, dwarf_rdi, LLDB_REGNUM_GENERIC_ARG1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rbp", "fp", 8, 0, eEncodingUint, eFormatHex, {dwarf_rbp, dwarf_rbp, LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rsp", "sp", 8, 0, eEncodingUint, eFormatHex, {dwarf_rsp, dwarf_rsp, LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r8", "arg5", 8, 0, eEncodingUint, eFormatHex, {dwarf_r8, dwarf_r8, LLDB_REGNUM_GENERIC_ARG5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r9", "arg6", 8, 0, eEncodingUint, eFormatHex, {dwarf_r9, dwarf_r9, LLDB_REGNUM_GENERIC_ARG6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r10", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r10, dwarf_r10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r11", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r11, dwarf_r11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r12", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r12, dwarf_r12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r13", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r13, dwarf_r13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r14", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r14, dwarf_r14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"r15", nullptr, 8, 0, eEncodingUint, eFormatHex, {dwarf_r15, dwarf_r15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rip", "pc", 8, 0, eEncodingUint, eFormatHex, {dwarf_rip, dwarf_rip, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"rflags", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"cs", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ss", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ds", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"es", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fs", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"gs", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm0", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm0, dwarf_stmm0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm1", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm1, dwarf_stmm1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm2", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm2, dwarf_stmm2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm3", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm3, dwarf_stmm3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm4", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm4, dwarf_stmm4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm5", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm5, dwarf_stmm5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm6", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm6, dwarf_stmm6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"stmm7", nullptr, 10, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_stmm7, dwarf_stmm7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fctrl", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fstat", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ftag", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fiseg", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fioff", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"foseg", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fooff", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"fop", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm0", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm0, dwarf_xmm0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm1", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm1, dwarf_xmm1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm2", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm2, dwarf_xmm2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm3", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm3, dwarf_xmm3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm4", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm4, dwarf_xmm4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm5", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm5, dwarf_xmm5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm6", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm6, dwarf_xmm6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm7", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm7, dwarf_xmm7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm8", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm8, dwarf_xmm8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm9", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm9, dwarf_xmm9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm10", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm10, dwarf_xmm10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm11", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm11, dwarf_xmm11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm12", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm12, dwarf_xmm12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm13", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm13, dwarf_xmm13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm14", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm14, dwarf_xmm14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"xmm15", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_xmm15, dwarf_xmm15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"mxcsr", nullptr, 4, 0, eEncodingUint, eFormatHex, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm0", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm0, dwarf_ymm0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm1", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm1, dwarf_ymm1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm2", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm2, dwarf_ymm2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm3", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm3, dwarf_ymm3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm4", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm4, dwarf_ymm4, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm5", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm5, dwarf_ymm5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm6", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm6, dwarf_ymm6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm7", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm7, dwarf_ymm7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm8", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm8, dwarf_ymm8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm9", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm9, dwarf_ymm9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm10", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm10, dwarf_ymm10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm11", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm11, dwarf_ymm11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm12", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm12, dwarf_ymm12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm13", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm13, dwarf_ymm13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm14", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm14, dwarf_ymm14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"ymm15", nullptr, 32, 0, eEncodingVector, eFormatVectorOfUInt8, {dwarf_ymm15, dwarf_ymm15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bnd0", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt64, {dwarf_bnd0, dwarf_bnd0, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bnd1", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt64, {dwarf_bnd1, dwarf_bnd1, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bnd2", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt64, {dwarf_bnd2, dwarf_bnd2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bnd3", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt64, {dwarf_bnd3, dwarf_bnd3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bndcfgu", nullptr, 8, 0, eEncodingVector, eFormatVectorOfUInt8, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}, {"bndstatus", nullptr, 8, 0, eEncodingVector, eFormatVectorOfUInt8, {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, 0}}; static const uint32_t k_num_register_infos = llvm::array_lengthof(g_register_infos); static bool g_register_info_names_constified = false; const lldb_private::RegisterInfo * ABISysV_x86_64::GetRegisterInfoArray(uint32_t &count) { // Make the C-string names and alt_names for the register infos into const // C-string values by having the ConstString unique the names in the global // constant C-string pool. if (!g_register_info_names_constified) { g_register_info_names_constified = true; for (uint32_t i = 0; i < k_num_register_infos; ++i) { if (g_register_infos[i].name) g_register_infos[i].name = ConstString(g_register_infos[i].name).GetCString(); if (g_register_infos[i].alt_name) g_register_infos[i].alt_name = ConstString(g_register_infos[i].alt_name).GetCString(); } } count = k_num_register_infos; return g_register_infos; } bool ABISysV_x86_64::GetPointerReturnRegister(const char *&name) { name = "rax"; return true; } size_t ABISysV_x86_64::GetRedZoneSize() const { return 128; } //------------------------------------------------------------------ // Static Functions //------------------------------------------------------------------ ABISP ABISysV_x86_64::CreateInstance(lldb::ProcessSP process_sp, const ArchSpec &arch) { static ABISP g_abi_sp; if (arch.GetTriple().getArch() == llvm::Triple::x86_64) { if (!g_abi_sp) g_abi_sp.reset(new ABISysV_x86_64(process_sp)); return g_abi_sp; } return ABISP(); } bool ABISysV_x86_64::PrepareTrivialCall(Thread &thread, addr_t sp, addr_t func_addr, addr_t return_addr, llvm::ArrayRef args) const { Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); if (log) { StreamString s; s.Printf("ABISysV_x86_64::PrepareTrivialCall (tid = 0x%" PRIx64 ", sp = 0x%" PRIx64 ", func_addr = 0x%" PRIx64 ", return_addr = 0x%" PRIx64, thread.GetID(), (uint64_t)sp, (uint64_t)func_addr, (uint64_t)return_addr); for (size_t i = 0; i < args.size(); ++i) s.Printf(", arg%" PRIu64 " = 0x%" PRIx64, static_cast(i + 1), args[i]); s.PutCString(")"); log->PutString(s.GetString()); } RegisterContext *reg_ctx = thread.GetRegisterContext().get(); if (!reg_ctx) return false; const RegisterInfo *reg_info = nullptr; if (args.size() > 6) // TODO handle more than 6 arguments return false; for (size_t i = 0; i < args.size(); ++i) { reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1 + i); if (log) log->Printf("About to write arg%" PRIu64 " (0x%" PRIx64 ") into %s", static_cast(i + 1), args[i], reg_info->name); if (!reg_ctx->WriteRegisterFromUnsigned(reg_info, args[i])) return false; } // First, align the SP if (log) log->Printf("16-byte aligning SP: 0x%" PRIx64 " to 0x%" PRIx64, (uint64_t)sp, (uint64_t)(sp & ~0xfull)); sp &= ~(0xfull); // 16-byte alignment sp -= 8; Status error; const RegisterInfo *pc_reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); const RegisterInfo *sp_reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); ProcessSP process_sp(thread.GetProcess()); RegisterValue reg_value; #if 0 // This code adds an extra frame so that we don't lose the function that we came from // by pushing the PC and the FP and then writing the current FP to point to the FP value // we just pushed. It is disabled for now until the stack backtracing code can be debugged. // Save current PC const RegisterInfo *fp_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP); if (reg_ctx->ReadRegister(pc_reg_info, reg_value)) { if (log) log->Printf("Pushing the current PC onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64()); if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error)) return false; sp -= 8; // Save current FP if (reg_ctx->ReadRegister(fp_reg_info, reg_value)) { if (log) log->Printf("Pushing the current FP onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64()); if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error)) return false; } // Setup FP backchain reg_value.SetUInt64 (sp); if (log) log->Printf("Writing FP: 0x%" PRIx64 " (for FP backchain)", reg_value.GetAsUInt64()); if (!reg_ctx->WriteRegister(fp_reg_info, reg_value)) { return false; } sp -= 8; } #endif if (log) log->Printf("Pushing the return address onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, (uint64_t)return_addr); // Save return address onto the stack if (!process_sp->WritePointerToMemory(sp, return_addr, error)) return false; // %rsp is set to the actual stack value. if (log) log->Printf("Writing SP: 0x%" PRIx64, (uint64_t)sp); if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_info, sp)) return false; // %rip is set to the address of the called function. if (log) log->Printf("Writing IP: 0x%" PRIx64, (uint64_t)func_addr); if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_info, func_addr)) return false; return true; } static bool ReadIntegerArgument(Scalar &scalar, unsigned int bit_width, bool is_signed, Thread &thread, uint32_t *argument_register_ids, unsigned int ¤t_argument_register, addr_t ¤t_stack_argument) { if (bit_width > 64) return false; // Scalar can't hold large integer arguments if (current_argument_register < 6) { scalar = thread.GetRegisterContext()->ReadRegisterAsUnsigned( argument_register_ids[current_argument_register], 0); current_argument_register++; if (is_signed) scalar.SignExtend(bit_width); } else { uint32_t byte_size = (bit_width + (8 - 1)) / 8; Status error; if (thread.GetProcess()->ReadScalarIntegerFromMemory( current_stack_argument, byte_size, is_signed, scalar, error)) { current_stack_argument += byte_size; return true; } return false; } return true; } bool ABISysV_x86_64::GetArgumentValues(Thread &thread, ValueList &values) const { unsigned int num_values = values.GetSize(); unsigned int value_index; // Extract the register context so we can read arguments from registers RegisterContext *reg_ctx = thread.GetRegisterContext().get(); if (!reg_ctx) return false; // Get the pointer to the first stack argument so we have a place to start // when reading data addr_t sp = reg_ctx->GetSP(0); if (!sp) return false; addr_t current_stack_argument = sp + 8; // jump over return address uint32_t argument_register_ids[6]; argument_register_ids[0] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1) ->kinds[eRegisterKindLLDB]; argument_register_ids[1] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG2) ->kinds[eRegisterKindLLDB]; argument_register_ids[2] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG3) ->kinds[eRegisterKindLLDB]; argument_register_ids[3] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG4) ->kinds[eRegisterKindLLDB]; argument_register_ids[4] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG5) ->kinds[eRegisterKindLLDB]; argument_register_ids[5] = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG6) ->kinds[eRegisterKindLLDB]; unsigned int current_argument_register = 0; for (value_index = 0; value_index < num_values; ++value_index) { Value *value = values.GetValueAtIndex(value_index); if (!value) return false; // We currently only support extracting values with Clang QualTypes. // Do we care about others? CompilerType compiler_type = value->GetCompilerType(); if (!compiler_type) return false; bool is_signed; if (compiler_type.IsIntegerOrEnumerationType(is_signed)) { ReadIntegerArgument(value->GetScalar(), compiler_type.GetBitSize(&thread), is_signed, thread, argument_register_ids, current_argument_register, current_stack_argument); } else if (compiler_type.IsPointerType()) { ReadIntegerArgument(value->GetScalar(), compiler_type.GetBitSize(&thread), false, thread, argument_register_ids, current_argument_register, current_stack_argument); } } return true; } Status ABISysV_x86_64::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp) { Status error; if (!new_value_sp) { error.SetErrorString("Empty value object for return value."); return error; } CompilerType compiler_type = new_value_sp->GetCompilerType(); if (!compiler_type) { error.SetErrorString("Null clang type for return value."); return error; } Thread *thread = frame_sp->GetThread().get(); bool is_signed; uint32_t count; bool is_complex; RegisterContext *reg_ctx = thread->GetRegisterContext().get(); bool set_it_simple = false; if (compiler_type.IsIntegerOrEnumerationType(is_signed) || compiler_type.IsPointerType()) { const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName("rax", 0); DataExtractor data; Status data_error; size_t num_bytes = new_value_sp->GetData(data, data_error); if (data_error.Fail()) { error.SetErrorStringWithFormat( "Couldn't convert return value to raw data: %s", data_error.AsCString()); return error; } lldb::offset_t offset = 0; if (num_bytes <= 8) { uint64_t raw_value = data.GetMaxU64(&offset, num_bytes); if (reg_ctx->WriteRegisterFromUnsigned(reg_info, raw_value)) set_it_simple = true; } else { error.SetErrorString("We don't support returning longer than 64 bit " "integer values at present."); } } else if (compiler_type.IsFloatingPointType(count, is_complex)) { if (is_complex) error.SetErrorString( "We don't support returning complex values at present"); else { size_t bit_width = compiler_type.GetBitSize(frame_sp.get()); if (bit_width <= 64) { const RegisterInfo *xmm0_info = reg_ctx->GetRegisterInfoByName("xmm0", 0); RegisterValue xmm0_value; DataExtractor data; Status data_error; size_t num_bytes = new_value_sp->GetData(data, data_error); if (data_error.Fail()) { error.SetErrorStringWithFormat( "Couldn't convert return value to raw data: %s", data_error.AsCString()); return error; } unsigned char buffer[16]; ByteOrder byte_order = data.GetByteOrder(); data.CopyByteOrderedData(0, num_bytes, buffer, 16, byte_order); xmm0_value.SetBytes(buffer, 16, byte_order); reg_ctx->WriteRegister(xmm0_info, xmm0_value); set_it_simple = true; } else { // FIXME - don't know how to do 80 bit long doubles yet. error.SetErrorString( "We don't support returning float values > 64 bits at present"); } } } if (!set_it_simple) { // Okay we've got a structure or something that doesn't fit in a simple // register. // We should figure out where it really goes, but we don't support this yet. error.SetErrorString("We only support setting simple integer and float " "return types at present."); } return error; } ValueObjectSP ABISysV_x86_64::GetReturnValueObjectSimple( Thread &thread, CompilerType &return_compiler_type) const { ValueObjectSP return_valobj_sp; Value value; if (!return_compiler_type) return return_valobj_sp; // value.SetContext (Value::eContextTypeClangType, return_value_type); value.SetCompilerType(return_compiler_type); RegisterContext *reg_ctx = thread.GetRegisterContext().get(); if (!reg_ctx) return return_valobj_sp; const uint32_t type_flags = return_compiler_type.GetTypeInfo(); if (type_flags & eTypeIsScalar) { value.SetValueType(Value::eValueTypeScalar); bool success = false; if (type_flags & eTypeIsInteger) { // Extract the register context so we can read arguments from registers const size_t byte_size = return_compiler_type.GetByteSize(nullptr); uint64_t raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned( reg_ctx->GetRegisterInfoByName("rax", 0), 0); const bool is_signed = (type_flags & eTypeIsSigned) != 0; switch (byte_size) { default: break; case sizeof(uint64_t): if (is_signed) value.GetScalar() = (int64_t)(raw_value); else value.GetScalar() = (uint64_t)(raw_value); success = true; break; case sizeof(uint32_t): if (is_signed) value.GetScalar() = (int32_t)(raw_value & UINT32_MAX); else value.GetScalar() = (uint32_t)(raw_value & UINT32_MAX); success = true; break; case sizeof(uint16_t): if (is_signed) value.GetScalar() = (int16_t)(raw_value & UINT16_MAX); else value.GetScalar() = (uint16_t)(raw_value & UINT16_MAX); success = true; break; case sizeof(uint8_t): if (is_signed) value.GetScalar() = (int8_t)(raw_value & UINT8_MAX); else value.GetScalar() = (uint8_t)(raw_value & UINT8_MAX); success = true; break; } } else if (type_flags & eTypeIsFloat) { if (type_flags & eTypeIsComplex) { // Don't handle complex yet. } else { const size_t byte_size = return_compiler_type.GetByteSize(nullptr); if (byte_size <= sizeof(long double)) { const RegisterInfo *xmm0_info = reg_ctx->GetRegisterInfoByName("xmm0", 0); RegisterValue xmm0_value; if (reg_ctx->ReadRegister(xmm0_info, xmm0_value)) { DataExtractor data; if (xmm0_value.GetData(data)) { lldb::offset_t offset = 0; if (byte_size == sizeof(float)) { value.GetScalar() = (float)data.GetFloat(&offset); success = true; } else if (byte_size == sizeof(double)) { value.GetScalar() = (double)data.GetDouble(&offset); success = true; } else if (byte_size == sizeof(long double)) { // Don't handle long double since that can be encoded as 80 bit // floats... } } } } } } if (success) return_valobj_sp = ValueObjectConstResult::Create( thread.GetStackFrameAtIndex(0).get(), value, ConstString("")); } else if (type_flags & eTypeIsPointer) { unsigned rax_id = reg_ctx->GetRegisterInfoByName("rax", 0)->kinds[eRegisterKindLLDB]; value.GetScalar() = (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(rax_id, 0); value.SetValueType(Value::eValueTypeScalar); return_valobj_sp = ValueObjectConstResult::Create( thread.GetStackFrameAtIndex(0).get(), value, ConstString("")); } else if (type_flags & eTypeIsVector) { const size_t byte_size = return_compiler_type.GetByteSize(nullptr); if (byte_size > 0) { const RegisterInfo *altivec_reg = reg_ctx->GetRegisterInfoByName("xmm0", 0); if (altivec_reg == nullptr) altivec_reg = reg_ctx->GetRegisterInfoByName("mm0", 0); if (altivec_reg) { if (byte_size <= altivec_reg->byte_size) { ProcessSP process_sp(thread.GetProcess()); if (process_sp) { std::unique_ptr heap_data_ap( new DataBufferHeap(byte_size, 0)); const ByteOrder byte_order = process_sp->GetByteOrder(); RegisterValue reg_value; if (reg_ctx->ReadRegister(altivec_reg, reg_value)) { Status error; if (reg_value.GetAsMemoryData( altivec_reg, heap_data_ap->GetBytes(), heap_data_ap->GetByteSize(), byte_order, error)) { DataExtractor data(DataBufferSP(heap_data_ap.release()), byte_order, process_sp->GetTarget() .GetArchitecture() .GetAddressByteSize()); return_valobj_sp = ValueObjectConstResult::Create( &thread, return_compiler_type, ConstString(""), data); } } } } else if (byte_size <= altivec_reg->byte_size * 2) { const RegisterInfo *altivec_reg2 = reg_ctx->GetRegisterInfoByName("xmm1", 0); if (altivec_reg2) { ProcessSP process_sp(thread.GetProcess()); if (process_sp) { std::unique_ptr heap_data_ap( new DataBufferHeap(byte_size, 0)); const ByteOrder byte_order = process_sp->GetByteOrder(); RegisterValue reg_value; RegisterValue reg_value2; if (reg_ctx->ReadRegister(altivec_reg, reg_value) && reg_ctx->ReadRegister(altivec_reg2, reg_value2)) { Status error; if (reg_value.GetAsMemoryData( altivec_reg, heap_data_ap->GetBytes(), altivec_reg->byte_size, byte_order, error) && reg_value2.GetAsMemoryData( altivec_reg2, heap_data_ap->GetBytes() + altivec_reg->byte_size, heap_data_ap->GetByteSize() - altivec_reg->byte_size, byte_order, error)) { DataExtractor data(DataBufferSP(heap_data_ap.release()), byte_order, process_sp->GetTarget() .GetArchitecture() .GetAddressByteSize()); return_valobj_sp = ValueObjectConstResult::Create( &thread, return_compiler_type, ConstString(""), data); } } } } } } } } return return_valobj_sp; } ValueObjectSP ABISysV_x86_64::GetReturnValueObjectImpl( Thread &thread, CompilerType &return_compiler_type) const { ValueObjectSP return_valobj_sp; if (!return_compiler_type) return return_valobj_sp; ExecutionContext exe_ctx(thread.shared_from_this()); return_valobj_sp = GetReturnValueObjectSimple(thread, return_compiler_type); if (return_valobj_sp) return return_valobj_sp; RegisterContextSP reg_ctx_sp = thread.GetRegisterContext(); if (!reg_ctx_sp) return return_valobj_sp; const size_t bit_width = return_compiler_type.GetBitSize(&thread); if (return_compiler_type.IsAggregateType()) { Target *target = exe_ctx.GetTargetPtr(); bool is_memory = true; if (bit_width <= 128) { ByteOrder target_byte_order = target->GetArchitecture().GetByteOrder(); DataBufferSP data_sp(new DataBufferHeap(16, 0)); DataExtractor return_ext(data_sp, target_byte_order, target->GetArchitecture().GetAddressByteSize()); const RegisterInfo *rax_info = reg_ctx_sp->GetRegisterInfoByName("rax", 0); const RegisterInfo *rdx_info = reg_ctx_sp->GetRegisterInfoByName("rdx", 0); const RegisterInfo *xmm0_info = reg_ctx_sp->GetRegisterInfoByName("xmm0", 0); const RegisterInfo *xmm1_info = reg_ctx_sp->GetRegisterInfoByName("xmm1", 0); RegisterValue rax_value, rdx_value, xmm0_value, xmm1_value; reg_ctx_sp->ReadRegister(rax_info, rax_value); reg_ctx_sp->ReadRegister(rdx_info, rdx_value); reg_ctx_sp->ReadRegister(xmm0_info, xmm0_value); reg_ctx_sp->ReadRegister(xmm1_info, xmm1_value); DataExtractor rax_data, rdx_data, xmm0_data, xmm1_data; rax_value.GetData(rax_data); rdx_value.GetData(rdx_data); xmm0_value.GetData(xmm0_data); xmm1_value.GetData(xmm1_data); uint32_t fp_bytes = 0; // Tracks how much of the xmm registers we've consumed so far uint32_t integer_bytes = 0; // Tracks how much of the rax/rds registers we've consumed so far const uint32_t num_children = return_compiler_type.GetNumFields(); // Since we are in the small struct regime, assume we are not in memory. is_memory = false; for (uint32_t idx = 0; idx < num_children; idx++) { std::string name; uint64_t field_bit_offset = 0; bool is_signed; bool is_complex; uint32_t count; CompilerType field_compiler_type = return_compiler_type.GetFieldAtIndex( idx, name, &field_bit_offset, nullptr, nullptr); const size_t field_bit_width = field_compiler_type.GetBitSize(&thread); // if we don't know the size of the field (e.g. invalid type), just bail // out if (field_bit_width == 0) break; // If there are any unaligned fields, this is stored in memory. if (field_bit_offset % field_bit_width != 0) { is_memory = true; break; } uint32_t field_byte_width = field_bit_width / 8; uint32_t field_byte_offset = field_bit_offset / 8; DataExtractor *copy_from_extractor = nullptr; uint32_t copy_from_offset = 0; if (field_compiler_type.IsIntegerOrEnumerationType(is_signed) || field_compiler_type.IsPointerType()) { if (integer_bytes < 8) { if (integer_bytes + field_byte_width <= 8) { // This is in RAX, copy from register to our result structure: copy_from_extractor = &rax_data; copy_from_offset = integer_bytes; integer_bytes += field_byte_width; } else { // The next field wouldn't fit in the remaining space, so we // pushed it to rdx. copy_from_extractor = &rdx_data; copy_from_offset = 0; integer_bytes = 8 + field_byte_width; } } else if (integer_bytes + field_byte_width <= 16) { copy_from_extractor = &rdx_data; copy_from_offset = integer_bytes - 8; integer_bytes += field_byte_width; } else { // The last field didn't fit. I can't see how that would happen w/o // the overall size being // greater than 16 bytes. For now, return a nullptr return value // object. return return_valobj_sp; } } else if (field_compiler_type.IsFloatingPointType(count, is_complex)) { // Structs with long doubles are always passed in memory. if (field_bit_width == 128) { is_memory = true; break; } else if (field_bit_width == 64) { // These have to be in a single xmm register. if (fp_bytes == 0) copy_from_extractor = &xmm0_data; else copy_from_extractor = &xmm1_data; copy_from_offset = 0; fp_bytes += field_byte_width; } else if (field_bit_width == 32) { // This one is kind of complicated. If we are in an "eightbyte" // with another float, we'll // be stuffed into an xmm register with it. If we are in an // "eightbyte" with one or more ints, // then we will be stuffed into the appropriate GPR with them. bool in_gpr; if (field_byte_offset % 8 == 0) { // We are at the beginning of one of the eightbytes, so check the // next element (if any) if (idx == num_children - 1) in_gpr = false; else { uint64_t next_field_bit_offset = 0; CompilerType next_field_compiler_type = return_compiler_type.GetFieldAtIndex(idx + 1, name, &next_field_bit_offset, nullptr, nullptr); if (next_field_compiler_type.IsIntegerOrEnumerationType( is_signed)) in_gpr = true; else { copy_from_offset = 0; in_gpr = false; } } } else if (field_byte_offset % 4 == 0) { // We are inside of an eightbyte, so see if the field before us is // floating point: // This could happen if somebody put padding in the structure. if (idx == 0) in_gpr = false; else { uint64_t prev_field_bit_offset = 0; CompilerType prev_field_compiler_type = return_compiler_type.GetFieldAtIndex(idx - 1, name, &prev_field_bit_offset, nullptr, nullptr); if (prev_field_compiler_type.IsIntegerOrEnumerationType( is_signed)) in_gpr = true; else { copy_from_offset = 4; in_gpr = false; } } } else { is_memory = true; continue; } // Okay, we've figured out whether we are in GPR or XMM, now figure // out which one. if (in_gpr) { if (integer_bytes < 8) { // This is in RAX, copy from register to our result structure: copy_from_extractor = &rax_data; copy_from_offset = integer_bytes; integer_bytes += field_byte_width; } else { copy_from_extractor = &rdx_data; copy_from_offset = integer_bytes - 8; integer_bytes += field_byte_width; } } else { if (fp_bytes < 8) copy_from_extractor = &xmm0_data; else copy_from_extractor = &xmm1_data; fp_bytes += field_byte_width; } } } // These two tests are just sanity checks. If I somehow get the // type calculation wrong above it is better to just return nothing // than to assert or crash. if (!copy_from_extractor) return return_valobj_sp; if (copy_from_offset + field_byte_width > copy_from_extractor->GetByteSize()) return return_valobj_sp; copy_from_extractor->CopyByteOrderedData( copy_from_offset, field_byte_width, data_sp->GetBytes() + field_byte_offset, field_byte_width, target_byte_order); } if (!is_memory) { // The result is in our data buffer. Let's make a variable object out // of it: return_valobj_sp = ValueObjectConstResult::Create( &thread, return_compiler_type, ConstString(""), return_ext); } } // FIXME: This is just taking a guess, rax may very well no longer hold the // return storage location. // If we are going to do this right, when we make a new frame we should // check to see if it uses a memory // return, and if we are at the first instruction and if so stash away the // return location. Then we would // only return the memory return value if we know it is valid. if (is_memory) { unsigned rax_id = reg_ctx_sp->GetRegisterInfoByName("rax", 0)->kinds[eRegisterKindLLDB]; lldb::addr_t storage_addr = (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(rax_id, 0); return_valobj_sp = ValueObjectMemory::Create( &thread, "", Address(storage_addr, nullptr), return_compiler_type); } } return return_valobj_sp; } // This defines the CFA as rsp+8 // the saved pc is at CFA-8 (i.e. rsp+0) // The saved rsp is CFA+0 bool ABISysV_x86_64::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) { unwind_plan.Clear(); unwind_plan.SetRegisterKind(eRegisterKindDWARF); uint32_t sp_reg_num = dwarf_rsp; uint32_t pc_reg_num = dwarf_rip; UnwindPlan::RowSP row(new UnwindPlan::Row); row->GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 8); row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -8, false); row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true); unwind_plan.AppendRow(row); unwind_plan.SetSourceName("x86_64 at-func-entry default"); unwind_plan.SetSourcedFromCompiler(eLazyBoolNo); return true; } // This defines the CFA as rbp+16 // The saved pc is at CFA-8 (i.e. rbp+8) // The saved rbp is at CFA-16 (i.e. rbp+0) // The saved rsp is CFA+0 bool ABISysV_x86_64::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) { unwind_plan.Clear(); unwind_plan.SetRegisterKind(eRegisterKindDWARF); uint32_t fp_reg_num = dwarf_rbp; uint32_t sp_reg_num = dwarf_rsp; uint32_t pc_reg_num = dwarf_rip; UnwindPlan::RowSP row(new UnwindPlan::Row); const int32_t ptr_size = 8; row->GetCFAValue().SetIsRegisterPlusOffset(dwarf_rbp, 2 * ptr_size); row->SetOffset(0); row->SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true); row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true); row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true); unwind_plan.AppendRow(row); unwind_plan.SetSourceName("x86_64 default unwind plan"); unwind_plan.SetSourcedFromCompiler(eLazyBoolNo); unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); return true; } bool ABISysV_x86_64::RegisterIsVolatile(const RegisterInfo *reg_info) { return !RegisterIsCalleeSaved(reg_info); } // See "Register Usage" in the // "System V Application Binary Interface" // "AMD64 Architecture Processor Supplement" // (or "x86-64(tm) Architecture Processor Supplement" in earlier revisions) // (this doc is also commonly referred to as the x86-64/AMD64 psABI) // Edited by Michael Matz, Jan Hubicka, Andreas Jaeger, and Mark Mitchell // current version is 0.99.6 released 2012-07-02 at // http://refspecs.linuxfoundation.org/elf/x86-64-abi-0.99.pdf // It's being revised & updated at https://github.com/hjl-tools/x86-psABI/ bool ABISysV_x86_64::RegisterIsCalleeSaved(const RegisterInfo *reg_info) { if (reg_info) { // Preserved registers are : // rbx, rsp, rbp, r12, r13, r14, r15 // mxcsr (partially preserved) // x87 control word const char *name = reg_info->name; if (name[0] == 'r') { switch (name[1]) { case '1': // r12, r13, r14, r15 if (name[2] >= '2' && name[2] <= '5') return name[3] == '\0'; break; default: break; } } // Accept shorter-variant versions, rbx/ebx, rip/ eip, etc. if (name[0] == 'r' || name[0] == 'e') { switch (name[1]) { case 'b': // rbp, rbx if (name[2] == 'p' || name[2] == 'x') return name[3] == '\0'; break; case 'i': // rip if (name[2] == 'p') return name[3] == '\0'; break; case 's': // rsp if (name[2] == 'p') return name[3] == '\0'; break; } } if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp return true; if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp return true; if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc return true; } return false; } void ABISysV_x86_64::Initialize() { PluginManager::RegisterPlugin( GetPluginNameStatic(), "System V ABI for x86_64 targets", CreateInstance); } void ABISysV_x86_64::Terminate() { PluginManager::UnregisterPlugin(CreateInstance); } lldb_private::ConstString ABISysV_x86_64::GetPluginNameStatic() { static ConstString g_name("sysv-x86_64"); return g_name; } //------------------------------------------------------------------ // PluginInterface protocol //------------------------------------------------------------------ lldb_private::ConstString ABISysV_x86_64::GetPluginName() { return GetPluginNameStatic(); } uint32_t ABISysV_x86_64::GetPluginVersion() { return 1; }