diff options
Diffstat (limited to 'source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp')
| -rw-r--r-- | source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp | 590 |
1 files changed, 590 insertions, 0 deletions
diff --git a/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp b/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp new file mode 100644 index 000000000000..e1fc13a691af --- /dev/null +++ b/source/Plugins/ABI/SysV-mips/ABISysV_mips.cpp @@ -0,0 +1,590 @@ +//===-- ABISysV_mips.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_mips.h" + +#include "lldb/Core/ConstString.h" +#include "lldb/Core/DataExtractor.h" +#include "lldb/Core/Error.h" +#include "lldb/Core/Log.h" +#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/ValueObjectRegister.h" +#include "lldb/Core/ValueObjectMemory.h" +#include "lldb/Symbol/ClangASTContext.h" +#include "lldb/Symbol/UnwindPlan.h" +#include "lldb/Target/Target.h" +#include "lldb/Target/Process.h" +#include "lldb/Target/RegisterContext.h" +#include "lldb/Target/StackFrame.h" +#include "lldb/Target/Thread.h" + +#include "llvm/ADT/STLExtras.h" +#include "llvm/ADT/Triple.h" + +using namespace lldb; +using namespace lldb_private; + +enum gcc_dwarf_regnums +{ + gcc_dwarf_r0 = 0, + gcc_dwarf_r1, + gcc_dwarf_r2, + gcc_dwarf_r3, + gcc_dwarf_r4, + gcc_dwarf_r5, + gcc_dwarf_r6, + gcc_dwarf_r7, + gcc_dwarf_r8, + gcc_dwarf_r9, + gcc_dwarf_r10, + gcc_dwarf_r11, + gcc_dwarf_r12, + gcc_dwarf_r13, + gcc_dwarf_r14, + gcc_dwarf_r15, + gcc_dwarf_r16, + gcc_dwarf_r17, + gcc_dwarf_r18, + gcc_dwarf_r19, + gcc_dwarf_r20, + gcc_dwarf_r21, + gcc_dwarf_r22, + gcc_dwarf_r23, + gcc_dwarf_r24, + gcc_dwarf_r25, + gcc_dwarf_r26, + gcc_dwarf_r27, + gcc_dwarf_r28, + gcc_dwarf_r29, + gcc_dwarf_r30, + gcc_dwarf_r31, + gcc_dwarf_sr, + gcc_dwarf_lo, + gcc_dwarf_hi, + gcc_dwarf_bad, + gcc_dwarf_cause, + gcc_dwarf_pc +}; + +enum gdb_regnums +{ + gdb_r0 = 0, + gdb_r1, + gdb_r2, + gdb_r3, + gdb_r4, + gdb_r5, + gdb_r6, + gdb_r7, + gdb_r8, + gdb_r9, + gdb_r10, + gdb_r11, + gdb_r12, + gdb_r13, + gdb_r14, + gdb_r15, + gdb_r16, + gdb_r17, + gdb_r18, + gdb_r19, + gdb_r20, + gdb_r21, + gdb_r22, + gdb_r23, + gdb_r24, + gdb_r25, + gdb_r26, + gdb_r27, + gdb_r28, + gdb_r29, + gdb_r30, + gdb_r31, + gdb_sr, + gdb_lo, + gdb_hi, + gdb_bad, + gdb_cause, + gdb_pc +}; + +static const RegisterInfo +g_register_infos[] = +{ + // NAME ALT SZ OFF ENCODING FORMAT COMPILER DWARF GENERIC GDB LLDB NATIVE VALUE REGS INVALIDATE REGS + // ======== ====== == === ============= =================== ============ ===================== ==================== ================= ====================== ========== =============== + { "r0" , "zero", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r0, gcc_dwarf_r0, LLDB_INVALID_REGNUM, gdb_r0, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r1" , "AT", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r1, gcc_dwarf_r1, LLDB_INVALID_REGNUM, gdb_r1, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r2" , "v0", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r2, gcc_dwarf_r2, LLDB_INVALID_REGNUM, gdb_r2, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r3" , "v1", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r3, gcc_dwarf_r3, LLDB_INVALID_REGNUM, gdb_r3, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r4" , "arg1", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r4, gcc_dwarf_r4, LLDB_REGNUM_GENERIC_ARG1, gdb_r4, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r5" , "arg2", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r5, gcc_dwarf_r5, LLDB_REGNUM_GENERIC_ARG2, gdb_r5, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r6" , "arg3", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r6, gcc_dwarf_r6, LLDB_REGNUM_GENERIC_ARG3, gdb_r6, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r7" , "arg4", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r7, gcc_dwarf_r7, LLDB_REGNUM_GENERIC_ARG4, gdb_r7, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r8" , "arg5", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r8, gcc_dwarf_r8, LLDB_INVALID_REGNUM, gdb_r8, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r9" , "arg6", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r9, gcc_dwarf_r9, LLDB_INVALID_REGNUM, gdb_r9, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r10" , "arg7", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r10, gcc_dwarf_r10, LLDB_INVALID_REGNUM, gdb_r10, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r11" , "arg8", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r11, gcc_dwarf_r11, LLDB_INVALID_REGNUM, gdb_r11, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r12" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r12, gcc_dwarf_r12, LLDB_INVALID_REGNUM, gdb_r12, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r13" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r13, gcc_dwarf_r13, LLDB_INVALID_REGNUM, gdb_r13, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r14" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r14, gcc_dwarf_r14, LLDB_INVALID_REGNUM, gdb_r14, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r15" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r15, gcc_dwarf_r15, LLDB_INVALID_REGNUM, gdb_r15, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r16" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r16, gcc_dwarf_r16, LLDB_INVALID_REGNUM, gdb_r16, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r17" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r17, gcc_dwarf_r17, LLDB_INVALID_REGNUM, gdb_r17, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r18" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r18, gcc_dwarf_r18, LLDB_INVALID_REGNUM, gdb_r18, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r19" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r19, gcc_dwarf_r19, LLDB_INVALID_REGNUM, gdb_r19, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r20" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r20, gcc_dwarf_r20, LLDB_INVALID_REGNUM, gdb_r20, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r21" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r21, gcc_dwarf_r21, LLDB_INVALID_REGNUM, gdb_r21, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r22" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r22, gcc_dwarf_r22, LLDB_INVALID_REGNUM, gdb_r22, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r23" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r23, gcc_dwarf_r23, LLDB_INVALID_REGNUM, gdb_r23, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r24" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r24, gcc_dwarf_r24, LLDB_INVALID_REGNUM, gdb_r24, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r25" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r25, gcc_dwarf_r25, LLDB_INVALID_REGNUM, gdb_r25, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r26" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r26, gcc_dwarf_r26, LLDB_INVALID_REGNUM, gdb_r26, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r27" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r27, gcc_dwarf_r27, LLDB_INVALID_REGNUM, gdb_r27, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r28" , "gp", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r28, gcc_dwarf_r28, LLDB_INVALID_REGNUM, gdb_r28, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r29" , "sp", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r29, gcc_dwarf_r29, LLDB_REGNUM_GENERIC_SP, gdb_r29, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r30" , "fp", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r30, gcc_dwarf_r30, LLDB_REGNUM_GENERIC_FP, gdb_r30, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "r31" , "ra", 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_r31, gcc_dwarf_r31, LLDB_REGNUM_GENERIC_RA, gdb_r31, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "sr" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_sr, gcc_dwarf_sr, LLDB_REGNUM_GENERIC_FLAGS, gdb_sr, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "lo" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_lo, gcc_dwarf_lo, LLDB_INVALID_REGNUM, gdb_lo, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "hi" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_hi, gcc_dwarf_hi, LLDB_INVALID_REGNUM, gdb_hi, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "bad" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_bad, gcc_dwarf_bad, LLDB_INVALID_REGNUM, gdb_bad, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "cause" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_cause, gcc_dwarf_cause, LLDB_INVALID_REGNUM, gdb_cause, LLDB_INVALID_REGNUM }, NULL, NULL}, + { "pc" , NULL, 4, 0, eEncodingUint, eFormatHex, { gcc_dwarf_pc, gcc_dwarf_pc, LLDB_REGNUM_GENERIC_PC, gdb_pc, LLDB_INVALID_REGNUM }, NULL, NULL}, +}; + +static const uint32_t k_num_register_infos = llvm::array_lengthof(g_register_infos); + +const lldb_private::RegisterInfo * +ABISysV_mips::GetRegisterInfoArray (uint32_t &count) +{ + count = k_num_register_infos; + return g_register_infos; +} + +size_t +ABISysV_mips::GetRedZoneSize () const +{ + return 0; +} + +//------------------------------------------------------------------ +// Static Functions +//------------------------------------------------------------------ +ABISP +ABISysV_mips::CreateInstance (const ArchSpec &arch) +{ + static ABISP g_abi_sp; + const llvm::Triple::ArchType arch_type = arch.GetTriple().getArch(); + if ((arch_type == llvm::Triple::mips) || + (arch_type == llvm::Triple::mipsel)) + { + if (!g_abi_sp) + g_abi_sp.reset (new ABISysV_mips); + return g_abi_sp; + } + return ABISP(); +} + +bool +ABISysV_mips::PrepareTrivialCall (Thread &thread, + addr_t sp, + addr_t func_addr, + addr_t return_addr, + llvm::ArrayRef<addr_t> args) const +{ + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); + + if (log) + { + StreamString s; + s.Printf("ABISysV_mips::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%zd = 0x%" PRIx64, i + 1, args[i]); + s.PutCString (")"); + log->PutCString(s.GetString().c_str()); + } + + RegisterContext *reg_ctx = thread.GetRegisterContext().get(); + if (!reg_ctx) + return false; + + const RegisterInfo *reg_info = NULL; + + RegisterValue reg_value; + + // Argument registers + const char *reg_names[] = { "r4", "r5", "r6", "r7" }; + + llvm::ArrayRef<addr_t>::iterator ai = args.begin(), ae = args.end(); + + // Write arguments to registers + for (size_t i = 0; i < llvm::array_lengthof(reg_names); ++i) + { + if (ai == ae) + break; + + reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1 + i); + if (log) + log->Printf("About to write arg%zd (0x%" PRIx64 ") into %s", i + 1, args[i], reg_info->name); + + if (!reg_ctx->WriteRegisterFromUnsigned(reg_info, args[i])) + return false; + + ++ai; + } + + // If we have more than 4 arguments --Spill onto the stack + if (ai != ae) + { + // No of arguments to go on stack + size_t num_stack_regs = args.size(); + + // Allocate needed space for args on the stack + sp -= (num_stack_regs * 4); + + // Keep the stack 8 byte aligned + sp &= ~(8ull-1ull); + + // just using arg1 to get the right size + const RegisterInfo *reg_info = reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG1); + + addr_t arg_pos = sp+16; + + size_t i = 4; + for (; ai != ae; ++ai) + { + reg_value.SetUInt32(*ai); + if (log) + log->Printf("About to write arg%zd (0x%" PRIx64 ") at 0x%" PRIx64 "", i+1, args[i], arg_pos); + + if (reg_ctx->WriteRegisterValueToMemory(reg_info, arg_pos, reg_info->byte_size, reg_value).Fail()) + return false; + arg_pos += reg_info->byte_size; + i++; + } + } + + Error 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); + const RegisterInfo *ra_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA); + + if (log) + log->Printf("Writing SP: 0x%" PRIx64, (uint64_t)sp); + + // Set "sp" to the requested value + if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_info, sp)) + return false; + + if (log) + log->Printf("Writing RA: 0x%" PRIx64, (uint64_t)return_addr); + + // Set "ra" to the return address + if (!reg_ctx->WriteRegisterFromUnsigned (ra_reg_info, return_addr)) + return false; + + if (log) + log->Printf("Writing PC: 0x%" PRIx64, (uint64_t)func_addr); + + // Set pc to the address of the called function. + if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_info, func_addr)) + return false; + + return true; +} + +bool +ABISysV_mips::GetArgumentValues (Thread &thread, ValueList &values) const +{ + return false; +} + +Error +ABISysV_mips::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 *r2_info = reg_ctx->GetRegisterInfoByName("r2", 0); + if (num_bytes <= 4) + { + uint32_t raw_value = data.GetMaxU32(&offset, num_bytes); + + if (reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value)) + set_it_simple = true; + } + else + { + uint32_t raw_value = data.GetMaxU32(&offset, 4); + + if (reg_ctx->WriteRegisterFromUnsigned (r2_info, raw_value)) + { + const RegisterInfo *r3_info = reg_ctx->GetRegisterInfoByName("r3", 0); + uint32_t raw_value = data.GetMaxU32(&offset, num_bytes - offset); + + if (reg_ctx->WriteRegisterFromUnsigned (r3_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 +ABISysV_mips::GetReturnValueObjectSimple (Thread &thread, ClangASTType &return_clang_type) const +{ + ValueObjectSP return_valobj_sp; + return return_valobj_sp; +} + +ValueObjectSP +ABISysV_mips::GetReturnValueObjectImpl (Thread &thread, ClangASTType &return_clang_type) const +{ + ValueObjectSP return_valobj_sp; + Value value; + + if (!return_clang_type) + return return_valobj_sp; + + ExecutionContext exe_ctx (thread.shared_from_this()); + if (exe_ctx.GetTargetPtr() == NULL || exe_ctx.GetProcessPtr() == NULL) + return return_valobj_sp; + + value.SetClangType(return_clang_type); + + RegisterContext *reg_ctx = thread.GetRegisterContext().get(); + if (!reg_ctx) + return return_valobj_sp; + + bool is_signed; + + // In MIPS register "r2" (v0) holds the integer function return values + const RegisterInfo *r2_reg_info = reg_ctx->GetRegisterInfoByName("r2", 0); + + if (return_clang_type.IsIntegerType (is_signed)) + { + size_t bit_width = return_clang_type.GetBitSize(&thread); + + switch (bit_width) + { + default: + return return_valobj_sp; + case 64: + { + const RegisterInfo *r3_reg_info = reg_ctx->GetRegisterInfoByName("r3", 0); + uint64_t raw_value; + raw_value = reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT32_MAX; + raw_value |= ((uint64_t)(reg_ctx->ReadRegisterAsUnsigned(r3_reg_info, 0) & UINT32_MAX)) << 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)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT32_MAX); + else + value.GetScalar() = (uint32_t)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT32_MAX); + break; + case 16: + if (is_signed) + value.GetScalar() = (int16_t)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT16_MAX); + else + value.GetScalar() = (uint16_t)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT16_MAX); + break; + case 8: + if (is_signed) + value.GetScalar() = (int8_t)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT8_MAX); + else + value.GetScalar() = (uint8_t)(reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT8_MAX); + break; + } + } + else if (return_clang_type.IsPointerType ()) + { + uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(r2_reg_info, 0) & UINT32_MAX; + 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 +ABISysV_mips::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan) +{ + unwind_plan.Clear(); + unwind_plan.SetRegisterKind (eRegisterKindDWARF); + + UnwindPlan::RowSP row(new UnwindPlan::Row); + + // Our Call Frame Address is the stack pointer value + row->GetCFAValue().SetIsRegisterPlusOffset(gcc_dwarf_r29, 0); + + // The previous PC is in the RA + row->SetRegisterLocationToRegister(gcc_dwarf_pc, gcc_dwarf_r31, true); + unwind_plan.AppendRow (row); + + // All other registers are the same. + + unwind_plan.SetSourceName ("mips at-func-entry default"); + unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); + unwind_plan.SetReturnAddressRegister(gcc_dwarf_r31); + return true; +} + +bool +ABISysV_mips::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan) +{ + unwind_plan.Clear(); + unwind_plan.SetRegisterKind (eRegisterKindDWARF); + + UnwindPlan::RowSP row(new UnwindPlan::Row); + + row->GetCFAValue().SetIsRegisterPlusOffset(gcc_dwarf_r29, 0); + + row->SetRegisterLocationToRegister(gcc_dwarf_pc, gcc_dwarf_r31, true); + + unwind_plan.AppendRow (row); + unwind_plan.SetSourceName ("mips default unwind plan"); + unwind_plan.SetSourcedFromCompiler (eLazyBoolNo); + unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); + return true; +} + +bool +ABISysV_mips::RegisterIsVolatile (const RegisterInfo *reg_info) +{ + return !RegisterIsCalleeSaved (reg_info); +} + +bool +ABISysV_mips::RegisterIsCalleeSaved (const RegisterInfo *reg_info) +{ + if (reg_info) + { + // Preserved registers are : + // r16-r23, r28, r29, r30, r31 + + int reg = ((reg_info->byte_offset) / 4); + + bool save = (reg >= 16) && (reg <= 23); + save |= (reg >= 28) && (reg <= 31); + + return save; + } + return false; +} + +void +ABISysV_mips::Initialize() +{ + PluginManager::RegisterPlugin (GetPluginNameStatic(), + "System V ABI for mips targets", + CreateInstance); +} + +void +ABISysV_mips::Terminate() +{ + PluginManager::UnregisterPlugin (CreateInstance); +} + +lldb_private::ConstString +ABISysV_mips::GetPluginNameStatic() +{ + static ConstString g_name("sysv-mips"); + return g_name; +} + +//------------------------------------------------------------------ +// PluginInterface protocol +//------------------------------------------------------------------ +lldb_private::ConstString +ABISysV_mips::GetPluginName() +{ + return GetPluginNameStatic(); +} + +uint32_t +ABISysV_mips::GetPluginVersion() +{ + return 1; +} |