| //===-- ABIMacOSX_i386.cpp --------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "ABIMacOSX_i386.h" |
| |
| #include "lldb/Core/ConstString.h" |
| #include "lldb/Core/Error.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/RegisterValue.h" |
| #include "lldb/Core/Scalar.h" |
| #include "lldb/Core/ValueObjectConstResult.h" |
| #include "lldb/Symbol/ClangASTContext.h" |
| #include "lldb/Symbol/UnwindPlan.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| |
| #include "llvm/ADT/Triple.h" |
| |
| #include <vector> |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| enum |
| { |
| gcc_eax = 0, |
| gcc_ecx, |
| gcc_edx, |
| gcc_ebx, |
| gcc_ebp, |
| gcc_esp, |
| gcc_esi, |
| gcc_edi, |
| gcc_eip, |
| gcc_eflags |
| }; |
| |
| enum |
| { |
| dwarf_eax = 0, |
| dwarf_ecx, |
| dwarf_edx, |
| dwarf_ebx, |
| dwarf_esp, |
| dwarf_ebp, |
| dwarf_esi, |
| dwarf_edi, |
| dwarf_eip, |
| dwarf_eflags, |
| dwarf_stmm0 = 11, |
| dwarf_stmm1, |
| dwarf_stmm2, |
| dwarf_stmm3, |
| dwarf_stmm4, |
| dwarf_stmm5, |
| dwarf_stmm6, |
| dwarf_stmm7, |
| dwarf_xmm0 = 21, |
| dwarf_xmm1, |
| dwarf_xmm2, |
| dwarf_xmm3, |
| dwarf_xmm4, |
| dwarf_xmm5, |
| dwarf_xmm6, |
| dwarf_xmm7, |
| dwarf_ymm0 = dwarf_xmm0, |
| dwarf_ymm1 = dwarf_xmm1, |
| dwarf_ymm2 = dwarf_xmm2, |
| dwarf_ymm3 = dwarf_xmm3, |
| dwarf_ymm4 = dwarf_xmm4, |
| dwarf_ymm5 = dwarf_xmm5, |
| dwarf_ymm6 = dwarf_xmm6, |
| dwarf_ymm7 = dwarf_xmm7 |
| }; |
| |
| enum |
| { |
| gdb_eax = 0, |
| gdb_ecx = 1, |
| gdb_edx = 2, |
| gdb_ebx = 3, |
| gdb_esp = 4, |
| gdb_ebp = 5, |
| gdb_esi = 6, |
| gdb_edi = 7, |
| gdb_eip = 8, |
| gdb_eflags = 9, |
| gdb_cs = 10, |
| gdb_ss = 11, |
| gdb_ds = 12, |
| gdb_es = 13, |
| gdb_fs = 14, |
| gdb_gs = 15, |
| gdb_stmm0 = 16, |
| gdb_stmm1 = 17, |
| gdb_stmm2 = 18, |
| gdb_stmm3 = 19, |
| gdb_stmm4 = 20, |
| gdb_stmm5 = 21, |
| gdb_stmm6 = 22, |
| gdb_stmm7 = 23, |
| gdb_fctrl = 24, gdb_fcw = gdb_fctrl, |
| gdb_fstat = 25, gdb_fsw = gdb_fstat, |
| gdb_ftag = 26, gdb_ftw = gdb_ftag, |
| gdb_fiseg = 27, gdb_fpu_cs = gdb_fiseg, |
| gdb_fioff = 28, gdb_ip = gdb_fioff, |
| gdb_foseg = 29, gdb_fpu_ds = gdb_foseg, |
| gdb_fooff = 30, gdb_dp = gdb_fooff, |
| gdb_fop = 31, |
| gdb_xmm0 = 32, |
| gdb_xmm1 = 33, |
| gdb_xmm2 = 34, |
| gdb_xmm3 = 35, |
| gdb_xmm4 = 36, |
| gdb_xmm5 = 37, |
| gdb_xmm6 = 38, |
| gdb_xmm7 = 39, |
| gdb_mxcsr = 40, |
| gdb_mm0 = 41, |
| gdb_mm1 = 42, |
| gdb_mm2 = 43, |
| gdb_mm3 = 44, |
| gdb_mm4 = 45, |
| gdb_mm5 = 46, |
| gdb_mm6 = 47, |
| gdb_mm7 = 48, |
| gdb_ymm0 = gdb_xmm0, |
| gdb_ymm1 = gdb_xmm1, |
| gdb_ymm2 = gdb_xmm2, |
| gdb_ymm3 = gdb_xmm3, |
| gdb_ymm4 = gdb_xmm4, |
| gdb_ymm5 = gdb_xmm5, |
| gdb_ymm6 = gdb_xmm6, |
| gdb_ymm7 = gdb_xmm7 |
| }; |
| |
| |
| static RegisterInfo g_register_infos[] = |
| { |
| // NAME ALT SZ OFF ENCODING FORMAT COMPILER DWARF GENERIC GDB LLDB NATIVE VALUE REGS INVALIDATE REGS |
| // ====== ======= == === ============= ============ ===================== ===================== ============================ ==================== ====================== ========== =============== |
| { "eax", NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_eax , dwarf_eax , LLDB_INVALID_REGNUM , gdb_eax , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ebx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ebx , dwarf_ebx , LLDB_INVALID_REGNUM , gdb_ebx , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ecx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ecx , dwarf_ecx , LLDB_REGNUM_GENERIC_ARG4 , gdb_ecx , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "edx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edx , dwarf_edx , LLDB_REGNUM_GENERIC_ARG3 , gdb_edx , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "esi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_esi , dwarf_esi , LLDB_REGNUM_GENERIC_ARG2 , gdb_esi , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "edi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edi , dwarf_edi , LLDB_REGNUM_GENERIC_ARG1 , gdb_edi , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ebp" , "fp", 4, 0, eEncodingUint , eFormatHex , { gcc_ebp , dwarf_ebp , LLDB_REGNUM_GENERIC_FP , gdb_ebp , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "esp" , "sp", 4, 0, eEncodingUint , eFormatHex , { gcc_esp , dwarf_esp , LLDB_REGNUM_GENERIC_SP , gdb_esp , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "eip" , "pc", 4, 0, eEncodingUint , eFormatHex , { gcc_eip , dwarf_eip , LLDB_REGNUM_GENERIC_PC , gdb_eip , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "eflags", NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_REGNUM_GENERIC_FLAGS , gdb_eflags , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "cs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_cs , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ss" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ss , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ds" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ds , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "es" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_es , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fs , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "gs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_gs , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm0" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm0 , LLDB_INVALID_REGNUM , gdb_stmm0 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm1" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm1 , LLDB_INVALID_REGNUM , gdb_stmm1 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm2" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm2 , LLDB_INVALID_REGNUM , gdb_stmm2 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm3" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm3 , LLDB_INVALID_REGNUM , gdb_stmm3 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm4" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm4 , LLDB_INVALID_REGNUM , gdb_stmm4 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm5" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm5 , LLDB_INVALID_REGNUM , gdb_stmm5 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm6" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm6 , LLDB_INVALID_REGNUM , gdb_stmm6 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "stmm7" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm7 , LLDB_INVALID_REGNUM , gdb_stmm7 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fctrl" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fctrl , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fstat" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fstat , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ftag" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ftag , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fiseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fiseg , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fioff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fioff , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "foseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_foseg , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fooff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fooff , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "fop" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fop , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm0" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm0 , LLDB_INVALID_REGNUM , gdb_xmm0 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm1" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm1 , LLDB_INVALID_REGNUM , gdb_xmm1 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm2" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm2 , LLDB_INVALID_REGNUM , gdb_xmm2 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm3" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm3 , LLDB_INVALID_REGNUM , gdb_xmm3 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm4" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm4 , LLDB_INVALID_REGNUM , gdb_xmm4 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm5" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm5 , LLDB_INVALID_REGNUM , gdb_xmm5 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm6" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm6 , LLDB_INVALID_REGNUM , gdb_xmm6 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "xmm7" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm7 , LLDB_INVALID_REGNUM , gdb_xmm7 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "mxcsr" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_mxcsr , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm0" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm0 , LLDB_INVALID_REGNUM , gdb_ymm0 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm1" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm1 , LLDB_INVALID_REGNUM , gdb_ymm1 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm2" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm2 , LLDB_INVALID_REGNUM , gdb_ymm2 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm3" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm3 , LLDB_INVALID_REGNUM , gdb_ymm3 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm4" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm4 , LLDB_INVALID_REGNUM , gdb_ymm4 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm5" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm5 , LLDB_INVALID_REGNUM , gdb_ymm5 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm6" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm6 , LLDB_INVALID_REGNUM , gdb_ymm6 , LLDB_INVALID_REGNUM }, NULL, NULL}, |
| { "ymm7" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm7 , LLDB_INVALID_REGNUM , gdb_ymm7 , LLDB_INVALID_REGNUM }, NULL, NULL} |
| }; |
| |
| 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 * |
| ABIMacOSX_i386::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; |
| } |
| |
| size_t |
| ABIMacOSX_i386::GetRedZoneSize () const |
| { |
| return 0; |
| } |
| |
| //------------------------------------------------------------------ |
| // Static Functions |
| //------------------------------------------------------------------ |
| ABISP |
| ABIMacOSX_i386::CreateInstance (const ArchSpec &arch) |
| { |
| static ABISP g_abi_sp; |
| if (arch.GetTriple().getArch() == llvm::Triple::x86) |
| { |
| if (!g_abi_sp) |
| g_abi_sp.reset (new ABIMacOSX_i386); |
| return g_abi_sp; |
| } |
| return ABISP(); |
| } |
| |
| bool |
| ABIMacOSX_i386::PrepareTrivialCall (Thread &thread, |
| addr_t sp, |
| addr_t func_addr, |
| addr_t return_addr, |
| llvm::ArrayRef<addr_t> args) const |
| { |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| if (!reg_ctx) |
| return false; |
| uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| |
| // When writing a register value down to memory, the register info used |
| // to write memory just needs to have the correct size of a 32 bit register, |
| // the actual register it pertains to is not important, just the size needs |
| // to be correct. Here we use "eax"... |
| const RegisterInfo *reg_info_32 = reg_ctx->GetRegisterInfoByName("eax"); |
| if (!reg_info_32) |
| return false; // TODO this should actually never happen |
| |
| // Make room for the argument(s) on the stack |
| |
| Error error; |
| RegisterValue reg_value; |
| |
| // Write any arguments onto the stack |
| sp -= 4 * args.size(); |
| |
| // Align the SP |
| sp &= ~(16ull-1ull); // 16-byte alignment |
| |
| addr_t arg_pos = sp; |
| |
| for (addr_t arg : args) |
| { |
| reg_value.SetUInt32(arg); |
| error = reg_ctx->WriteRegisterValueToMemory (reg_info_32, |
| arg_pos, |
| reg_info_32->byte_size, |
| reg_value); |
| if (error.Fail()) |
| return false; |
| arg_pos += 4; |
| } |
| |
| // The return address is pushed onto the stack (yes after we just set the |
| // alignment above!). |
| sp -= 4; |
| reg_value.SetUInt32(return_addr); |
| error = reg_ctx->WriteRegisterValueToMemory (reg_info_32, |
| sp, |
| reg_info_32->byte_size, |
| reg_value); |
| if (error.Fail()) |
| return false; |
| |
| // %esp is set to the actual stack value. |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_num, sp)) |
| return false; |
| |
| // %eip is set to the address of the called function. |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_num, func_addr)) |
| return false; |
| |
| return true; |
| } |
| |
| bool |
| ABIMacOSX_i386::PrepareNormalCall (Thread &thread, |
| addr_t sp, |
| addr_t func_addr, |
| addr_t return_addr, |
| ValueList &args) const |
| { |
| ExecutionContext exe_ctx (thread.shared_from_this()); |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| if (!reg_ctx) |
| return false; |
| |
| Process *process = exe_ctx.GetProcessPtr(); |
| Error error; |
| uint32_t fp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP); |
| uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC); |
| uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP); |
| |
| // Do the argument layout |
| |
| std::vector <uint32_t> argLayout; // 4-byte chunks, as discussed in the ABI Function Call Guide |
| |
| size_t numArgs = args.GetSize(); |
| size_t index; |
| |
| for (index = 0; index < numArgs; ++index) |
| { |
| Value *val = args.GetValueAtIndex(index); |
| |
| if (!val) |
| return false; |
| |
| switch (val->GetValueType()) |
| { |
| case Value::eValueTypeScalar: |
| { |
| Scalar &scalar = val->GetScalar(); |
| switch (scalar.GetType()) |
| { |
| case Scalar::e_void: |
| return false; |
| case Scalar::e_sint: |
| case Scalar::e_uint: |
| case Scalar::e_slong: |
| case Scalar::e_ulong: |
| case Scalar::e_slonglong: |
| case Scalar::e_ulonglong: |
| { |
| uint64_t data = scalar.ULongLong(); |
| |
| switch (scalar.GetByteSize()) |
| { |
| default: |
| return false; |
| case 1: |
| argLayout.push_back((uint32_t)(data & 0xffull)); |
| break; |
| case 2: |
| argLayout.push_back((uint32_t)(data & 0xffffull)); |
| break; |
| case 4: |
| argLayout.push_back((uint32_t)(data & 0xffffffffull)); |
| break; |
| case 8: |
| argLayout.push_back((uint32_t)(data & 0xffffffffull)); |
| argLayout.push_back((uint32_t)(data >> 32)); |
| break; |
| } |
| } |
| break; |
| case Scalar::e_float: |
| { |
| float data = scalar.Float(); |
| uint32_t dataRaw = *((uint32_t*)(&data)); |
| argLayout.push_back(dataRaw); |
| } |
| break; |
| case Scalar::e_double: |
| { |
| double data = scalar.Double(); |
| uint32_t *dataRaw = ((uint32_t*)(&data)); |
| argLayout.push_back(dataRaw[0]); |
| argLayout.push_back(dataRaw[1]); |
| } |
| break; |
| case Scalar::e_long_double: |
| { |
| long double data = scalar.Double(); |
| uint32_t *dataRaw = ((uint32_t*)(&data)); |
| while ((argLayout.size() * 4) & 0xf) |
| argLayout.push_back(0); |
| argLayout.push_back(dataRaw[0]); |
| argLayout.push_back(dataRaw[1]); |
| argLayout.push_back(dataRaw[2]); |
| argLayout.push_back(dataRaw[3]); |
| } |
| break; |
| } |
| } |
| break; |
| case Value::eValueTypeHostAddress: |
| { |
| ClangASTType clang_type (val->GetClangType()); |
| if (clang_type) |
| { |
| uint32_t cstr_length = 0; |
| if (clang_type.IsCStringType (cstr_length)) |
| { |
| const char *cstr = (const char*)val->GetScalar().ULongLong(); |
| cstr_length = strlen(cstr); |
| |
| // Push the string onto the stack immediately. |
| |
| sp -= (cstr_length + 1); |
| |
| if (process->WriteMemory(sp, cstr, cstr_length + 1, error) != (cstr_length + 1)) |
| return false; |
| |
| // Put the address of the string into the argument array. |
| |
| argLayout.push_back((uint32_t)(sp & 0xffffffff)); |
| } |
| else |
| { |
| return false; |
| } |
| } |
| break; |
| } |
| break; |
| case Value::eValueTypeFileAddress: |
| case Value::eValueTypeLoadAddress: |
| default: |
| return false; |
| } |
| } |
| |
| // Make room for the arguments on the stack |
| |
| sp -= 4 * argLayout.size(); |
| |
| // Align the SP |
| |
| sp &= ~(16ull-1ull); // 16-byte alignment |
| |
| // Write the arguments on the stack |
| |
| size_t numChunks = argLayout.size(); |
| |
| for (index = 0; index < numChunks; ++index) |
| if (process->WriteMemory(sp + (index * 4), &argLayout[index], sizeof(uint32_t), error) != sizeof(uint32_t)) |
| return false; |
| |
| // The return address is pushed onto the stack. |
| |
| sp -= 4; |
| uint32_t returnAddressU32 = return_addr; |
| if (process->WriteMemory (sp, &returnAddressU32, sizeof(returnAddressU32), error) != sizeof(returnAddressU32)) |
| return false; |
| |
| // %esp is set to the actual stack value. |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_num, sp)) |
| return false; |
| |
| // %ebp is set to a fake value, in our case 0x0x00000000 |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned(fp_reg_num, 0x00000000)) |
| return false; |
| |
| // %eip is set to the address of the called function. |
| |
| if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_num, func_addr)) |
| return false; |
| |
| return true; |
| } |
| |
| static bool |
| ReadIntegerArgument (Scalar &scalar, |
| unsigned int bit_width, |
| bool is_signed, |
| Process *process, |
| addr_t ¤t_stack_argument) |
| { |
| |
| uint32_t byte_size = (bit_width + (8-1))/8; |
| Error error; |
| if (process->ReadScalarIntegerFromMemory(current_stack_argument, byte_size, is_signed, scalar, error)) |
| { |
| current_stack_argument += byte_size; |
| return true; |
| } |
| return false; |
| } |
| |
| bool |
| ABIMacOSX_i386::GetArgumentValues (Thread &thread, |
| ValueList &values) const |
| { |
| unsigned int num_values = values.GetSize(); |
| unsigned int value_index; |
| |
| // Get the pointer to the first stack argument so we have a place to start |
| // when reading data |
| |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| |
| if (!reg_ctx) |
| return false; |
| |
| addr_t sp = reg_ctx->GetSP(0); |
| |
| if (!sp) |
| return false; |
| |
| addr_t current_stack_argument = sp + 4; // jump over return address |
| |
| 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? |
| ClangASTType clang_type (value->GetClangType()); |
| if (clang_type) |
| { |
| bool is_signed; |
| |
| if (clang_type.IsIntegerType (is_signed)) |
| { |
| ReadIntegerArgument(value->GetScalar(), |
| clang_type.GetBitSize(), |
| is_signed, |
| thread.GetProcess().get(), |
| current_stack_argument); |
| } |
| else if (clang_type.IsPointerType()) |
| { |
| ReadIntegerArgument(value->GetScalar(), |
| clang_type.GetBitSize(), |
| false, |
| thread.GetProcess().get(), |
| current_stack_argument); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| Error |
| ABIMacOSX_i386::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp) |
| { |
| Error error; |
| if (!new_value_sp) |
| { |
| error.SetErrorString("Empty value object for return value."); |
| return error; |
| } |
| |
| ClangASTType clang_type = new_value_sp->GetClangType(); |
| if (!clang_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 (clang_type.IsIntegerType (is_signed) || clang_type.IsPointerType()) |
| { |
| DataExtractor data; |
| Error 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) |
| { |
| const RegisterInfo *eax_info = reg_ctx->GetRegisterInfoByName("eax", 0); |
| if (num_bytes <= 4) |
| { |
| uint32_t raw_value = data.GetMaxU32(&offset, num_bytes); |
| |
| if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value)) |
| set_it_simple = true; |
| } |
| else |
| { |
| uint32_t raw_value = data.GetMaxU32(&offset, 4); |
| |
| if (reg_ctx->WriteRegisterFromUnsigned (eax_info, raw_value)) |
| { |
| const RegisterInfo *edx_info = reg_ctx->GetRegisterInfoByName("edx", 0); |
| uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset); |
| |
| if (reg_ctx->WriteRegisterFromUnsigned (edx_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 (clang_type.IsFloatingPointType (count, is_complex)) |
| { |
| if (is_complex) |
| error.SetErrorString ("We don't support returning complex values at present"); |
| else |
| error.SetErrorString ("We don't support returning float values at present"); |
| } |
| |
| if (!set_it_simple) |
| error.SetErrorString ("We only support setting simple integer return types at present."); |
| |
| return error; |
| } |
| |
| ValueObjectSP |
| ABIMacOSX_i386::GetReturnValueObjectImpl (Thread &thread, |
| ClangASTType &clang_type) const |
| { |
| Value value; |
| ValueObjectSP return_valobj_sp; |
| |
| if (!clang_type) |
| return return_valobj_sp; |
| |
| //value.SetContext (Value::eContextTypeClangType, clang_type.GetOpaqueQualType()); |
| value.SetClangType (clang_type); |
| |
| RegisterContext *reg_ctx = thread.GetRegisterContext().get(); |
| if (!reg_ctx) |
| return return_valobj_sp; |
| |
| bool is_signed; |
| |
| if (clang_type.IsIntegerType (is_signed)) |
| { |
| size_t bit_width = clang_type.GetBitSize(); |
| |
| unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB]; |
| unsigned edx_id = reg_ctx->GetRegisterInfoByName("edx", 0)->kinds[eRegisterKindLLDB]; |
| |
| switch (bit_width) |
| { |
| default: |
| case 128: |
| // Scalar can't hold 128-bit literals, so we don't handle this |
| return return_valobj_sp; |
| case 64: |
| uint64_t raw_value; |
| raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff; |
| raw_value |= (thread.GetRegisterContext()->ReadRegisterAsUnsigned(edx_id, 0) & 0xffffffff) << 32; |
| if (is_signed) |
| value.GetScalar() = (int64_t)raw_value; |
| else |
| value.GetScalar() = (uint64_t)raw_value; |
| break; |
| case 32: |
| if (is_signed) |
| value.GetScalar() = (int32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff); |
| else |
| value.GetScalar() = (uint32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff); |
| break; |
| case 16: |
| if (is_signed) |
| value.GetScalar() = (int16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff); |
| else |
| value.GetScalar() = (uint16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff); |
| break; |
| case 8: |
| if (is_signed) |
| value.GetScalar() = (int8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff); |
| else |
| value.GetScalar() = (uint8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff); |
| break; |
| } |
| } |
| else if (clang_type.IsPointerType ()) |
| { |
| unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB]; |
| uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff; |
| value.GetScalar() = ptr; |
| } |
| else |
| { |
| // not handled yet |
| return return_valobj_sp; |
| } |
| |
| // If we get here, we have a valid Value, so make our ValueObject out of it: |
| |
| return_valobj_sp = ValueObjectConstResult::Create(thread.GetStackFrameAtIndex(0).get(), |
| value, |
| ConstString("")); |
| return return_valobj_sp; |
| } |
| |
| bool |
| ABIMacOSX_i386::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan) |
| { |
| unwind_plan.Clear(); |
| unwind_plan.SetRegisterKind (eRegisterKindDWARF); |
| |
| uint32_t sp_reg_num = dwarf_esp; |
| uint32_t pc_reg_num = dwarf_eip; |
| |
| UnwindPlan::RowSP row(new UnwindPlan::Row); |
| row->SetCFARegister (sp_reg_num); |
| row->SetCFAOffset (4); |
| row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -4, false); |
| unwind_plan.AppendRow (row); |
| unwind_plan.SetSourceName ("i386 at-func-entry default"); |
| unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); |
| return true; |
| } |
| |
| bool |
| ABIMacOSX_i386::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan) |
| { |
| unwind_plan.Clear (); |
| unwind_plan.SetRegisterKind (eRegisterKindDWARF); |
| |
| uint32_t fp_reg_num = dwarf_ebp; |
| uint32_t sp_reg_num = dwarf_esp; |
| uint32_t pc_reg_num = dwarf_eip; |
| |
| UnwindPlan::RowSP row(new UnwindPlan::Row); |
| const int32_t ptr_size = 4; |
| |
| row->SetCFARegister (fp_reg_num); |
| row->SetCFAOffset (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 ("i386 default unwind plan"); |
| unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); |
| unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); |
| return true; |
| } |
| |
| bool |
| ABIMacOSX_i386::RegisterIsVolatile (const RegisterInfo *reg_info) |
| { |
| return !RegisterIsCalleeSaved (reg_info); |
| } |
| |
| // v. http://developer.apple.com/library/mac/#documentation/developertools/Conceptual/LowLevelABI/130-IA-32_Function_Calling_Conventions/IA32.html#//apple_ref/doc/uid/TP40002492-SW4 |
| |
| bool |
| ABIMacOSX_i386::RegisterIsCalleeSaved (const RegisterInfo *reg_info) |
| { |
| if (reg_info) |
| { |
| // Saved registers are ebx, ebp, esi, edi, esp, eip |
| const char *name = reg_info->name; |
| if (name[0] == 'e') |
| { |
| switch (name[1]) |
| { |
| case 'b': |
| if (name[2] == 'x' || name[2] == 'p') |
| return name[3] == '\0'; |
| break; |
| case 'd': |
| if (name[2] == 'i') |
| return name[3] == '\0'; |
| break; |
| case 'i': |
| if (name[2] == 'p') |
| return name[3] == '\0'; |
| break; |
| case 's': |
| if (name[2] == 'i' || 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 |
| ABIMacOSX_i386::Initialize() |
| { |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| "Mac OS X ABI for i386 targets", |
| CreateInstance); |
| } |
| |
| void |
| ABIMacOSX_i386::Terminate() |
| { |
| PluginManager::UnregisterPlugin (CreateInstance); |
| } |
| |
| lldb_private::ConstString |
| ABIMacOSX_i386::GetPluginNameStatic () |
| { |
| static ConstString g_short_name("abi.macosx-i386"); |
| return g_short_name; |
| |
| } |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| lldb_private::ConstString |
| ABIMacOSX_i386::GetPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| ABIMacOSX_i386::GetPluginVersion() |
| { |
| return 1; |
| } |
| |