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authorDimitry Andric <dim@FreeBSD.org>2018-07-28 11:09:23 +0000
committerDimitry Andric <dim@FreeBSD.org>2018-07-28 11:09:23 +0000
commitf73363f1dd94996356cefbf24388f561891acf0b (patch)
treee3c31248bdb36eaec5fd833490d4278162dba2a0 /source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
parent160ee69dd7ae18978f4068116777639ea98dc951 (diff)
downloadsrc-f73363f1dd94996356cefbf24388f561891acf0b.tar.gz
src-f73363f1dd94996356cefbf24388f561891acf0b.zip
Vendor import of lldb trunk r338150:vendor/lldb/lldb-trunk-r338150
Notes
Notes: svn path=/vendor/lldb/dist/; revision=336823 svn path=/vendor/lldb/lldb-trunk-r338150/; revision=336824; tag=vendor/lldb/lldb-trunk-r338150
Diffstat (limited to 'source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp')
-rw-r--r--source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp1217
1 files changed, 661 insertions, 556 deletions
diff --git a/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp b/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
index 0348853c7fa0..d0140a0c894a 100644
--- a/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
+++ b/source/Plugins/ABI/SysV-ppc64/ABISysV_ppc64.cpp
@@ -16,6 +16,8 @@
#include "llvm/ADT/Triple.h"
// Project includes
+#include "Utility/PPC64LE_DWARF_Registers.h"
+#include "Utility/PPC64_DWARF_Registers.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/RegisterValue.h"
@@ -23,6 +25,7 @@
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Core/ValueObjectMemory.h"
#include "lldb/Core/ValueObjectRegister.h"
+#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/UnwindPlan.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
@@ -34,201 +37,48 @@
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Status.h"
-using namespace lldb;
-using namespace lldb_private;
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/Decl.h"
-enum dwarf_regnums {
- dwarf_r0 = 0,
- dwarf_r1,
- dwarf_r2,
- dwarf_r3,
- dwarf_r4,
- dwarf_r5,
- dwarf_r6,
- dwarf_r7,
- dwarf_r8,
- dwarf_r9,
- dwarf_r10,
- dwarf_r11,
- dwarf_r12,
- dwarf_r13,
- dwarf_r14,
- dwarf_r15,
- dwarf_r16,
- dwarf_r17,
- dwarf_r18,
- dwarf_r19,
- dwarf_r20,
- dwarf_r21,
- dwarf_r22,
- dwarf_r23,
- dwarf_r24,
- dwarf_r25,
- dwarf_r26,
- dwarf_r27,
- dwarf_r28,
- dwarf_r29,
- dwarf_r30,
- dwarf_r31,
- dwarf_f0,
- dwarf_f1,
- dwarf_f2,
- dwarf_f3,
- dwarf_f4,
- dwarf_f5,
- dwarf_f6,
- dwarf_f7,
- dwarf_f8,
- dwarf_f9,
- dwarf_f10,
- dwarf_f11,
- dwarf_f12,
- dwarf_f13,
- dwarf_f14,
- dwarf_f15,
- dwarf_f16,
- dwarf_f17,
- dwarf_f18,
- dwarf_f19,
- dwarf_f20,
- dwarf_f21,
- dwarf_f22,
- dwarf_f23,
- dwarf_f24,
- dwarf_f25,
- dwarf_f26,
- dwarf_f27,
- dwarf_f28,
- dwarf_f29,
- dwarf_f30,
- dwarf_f31,
- dwarf_cr,
- dwarf_fpscr,
- dwarf_xer = 101,
- dwarf_lr = 108,
- dwarf_ctr,
- dwarf_pc,
- dwarf_cfa,
-};
+#define DECLARE_REGISTER_INFOS_PPC64_STRUCT
+#include "Plugins/Process/Utility/RegisterInfos_ppc64.h"
+#undef DECLARE_REGISTER_INFOS_PPC64_STRUCT
-// Note that the size and offset will be updated by platform-specific classes.
-#define DEFINE_GPR(reg, alt, kind1, kind2, kind3, kind4) \
- { \
- #reg, alt, 8, 0, eEncodingUint, eFormatHex, {kind1, kind2, kind3, kind4 }, \
- nullptr, nullptr, nullptr, 0 \
- }
+#define DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
+#include "Plugins/Process/Utility/RegisterInfos_ppc64le.h"
+#undef DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
-static const RegisterInfo g_register_infos[] = {
- // General purpose registers. eh_frame, DWARF,
- // Generic, Process Plugin
- DEFINE_GPR(r0, nullptr, dwarf_r0, dwarf_r0, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r1, "sp", dwarf_r1, dwarf_r1, LLDB_REGNUM_GENERIC_SP,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r2, nullptr, dwarf_r2, dwarf_r2, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r3, "arg1", dwarf_r3, dwarf_r3, LLDB_REGNUM_GENERIC_ARG1,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r4, "arg2", dwarf_r4, dwarf_r4, LLDB_REGNUM_GENERIC_ARG2,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r5, "arg3", dwarf_r5, dwarf_r5, LLDB_REGNUM_GENERIC_ARG3,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r6, "arg4", dwarf_r6, dwarf_r6, LLDB_REGNUM_GENERIC_ARG4,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r7, "arg5", dwarf_r7, dwarf_r7, LLDB_REGNUM_GENERIC_ARG5,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r8, "arg6", dwarf_r8, dwarf_r8, LLDB_REGNUM_GENERIC_ARG6,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r9, "arg7", dwarf_r9, dwarf_r9, LLDB_REGNUM_GENERIC_ARG7,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r10, "arg8", dwarf_r10, dwarf_r10, LLDB_REGNUM_GENERIC_ARG8,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r11, nullptr, dwarf_r11, dwarf_r11, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r12, nullptr, dwarf_r12, dwarf_r12, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r13, nullptr, dwarf_r13, dwarf_r13, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r14, nullptr, dwarf_r14, dwarf_r14, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r15, nullptr, dwarf_r15, dwarf_r15, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r16, nullptr, dwarf_r16, dwarf_r16, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r17, nullptr, dwarf_r17, dwarf_r17, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r18, nullptr, dwarf_r18, dwarf_r18, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r19, nullptr, dwarf_r19, dwarf_r19, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r20, nullptr, dwarf_r20, dwarf_r20, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r21, nullptr, dwarf_r21, dwarf_r21, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r22, nullptr, dwarf_r22, dwarf_r22, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r23, nullptr, dwarf_r23, dwarf_r23, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r24, nullptr, dwarf_r24, dwarf_r24, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r25, nullptr, dwarf_r25, dwarf_r25, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r26, nullptr, dwarf_r26, dwarf_r26, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r27, nullptr, dwarf_r27, dwarf_r27, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r28, nullptr, dwarf_r28, dwarf_r28, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r29, nullptr, dwarf_r29, dwarf_r29, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r30, nullptr, dwarf_r30, dwarf_r30, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(r31, nullptr, dwarf_r31, dwarf_r31, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(lr, "lr", dwarf_lr, dwarf_lr, LLDB_REGNUM_GENERIC_RA,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(cr, "cr", dwarf_cr, dwarf_cr, LLDB_REGNUM_GENERIC_FLAGS,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(xer, "xer", dwarf_xer, dwarf_xer, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(ctr, "ctr", dwarf_ctr, dwarf_ctr, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM),
- DEFINE_GPR(pc, "pc", dwarf_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC,
- LLDB_INVALID_REGNUM),
- {nullptr,
- nullptr,
- 8,
- 0,
- eEncodingUint,
- eFormatHex,
- {dwarf_cfa, dwarf_cfa, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM},
- nullptr,
- nullptr,
- nullptr,
- 0}};
-
-static const uint32_t k_num_register_infos =
- llvm::array_lengthof(g_register_infos);
+using namespace lldb;
+using namespace lldb_private;
const lldb_private::RegisterInfo *
ABISysV_ppc64::GetRegisterInfoArray(uint32_t &count) {
- count = k_num_register_infos;
- return g_register_infos;
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ count = llvm::array_lengthof(g_register_infos_ppc64le);
+ return g_register_infos_ppc64le;
+ } else {
+ count = llvm::array_lengthof(g_register_infos_ppc64);
+ return g_register_infos_ppc64;
+ }
}
size_t ABISysV_ppc64::GetRedZoneSize() const { return 224; }
+lldb::ByteOrder ABISysV_ppc64::GetByteOrder() const {
+ return GetProcessSP()->GetByteOrder();
+}
+
//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
ABISP
-ABISysV_ppc64::CreateInstance(lldb::ProcessSP process_sp, const ArchSpec &arch) {
- static ABISP g_abi_sp;
- if (arch.GetTriple().getArch() == llvm::Triple::ppc64) {
- if (!g_abi_sp)
- g_abi_sp.reset(new ABISysV_ppc64(process_sp));
- return g_abi_sp;
+ABISysV_ppc64::CreateInstance(lldb::ProcessSP process_sp,
+ const ArchSpec &arch) {
+ if (arch.GetTriple().getArch() == llvm::Triple::ppc64 ||
+ arch.GetTriple().getArch() == llvm::Triple::ppc64le) {
+ return ABISP(new ABISysV_ppc64(process_sp));
}
return ABISP();
}
@@ -280,28 +130,68 @@ bool ABISysV_ppc64::PrepareTrivialCall(Thread &thread, addr_t sp,
sp &= ~(0xfull); // 16-byte alignment
- sp -= 8;
+ sp -= 544; // allocate frame to save TOC, RA and SP.
Status error;
+ uint64_t reg_value;
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());
+ const RegisterInfo *lr_reg_info =
+ reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA);
+ const RegisterInfo *r2_reg_info = reg_ctx->GetRegisterInfoAtIndex(2);
+ const RegisterInfo *r12_reg_info = reg_ctx->GetRegisterInfoAtIndex(12);
- RegisterValue reg_value;
-
+ // Save return address onto the stack.
if (log)
log->Printf("Pushing the return address onto the stack: 0x%" PRIx64
- ": 0x%" PRIx64,
+ "(+16): 0x%" PRIx64,
(uint64_t)sp, (uint64_t)return_addr);
+ if (!process_sp->WritePointerToMemory(sp + 16, return_addr, error))
+ return false;
- // Save return address onto the stack
- if (!process_sp->WritePointerToMemory(sp, return_addr, error))
+ // Write the return address to link register.
+ if (log)
+ log->Printf("Writing LR: 0x%" PRIx64, (uint64_t)return_addr);
+ if (!reg_ctx->WriteRegisterFromUnsigned(lr_reg_info, return_addr))
return false;
- // %r1 is set to the actual stack value.
+ // Write target address to %r12 register.
+ if (log)
+ log->Printf("Writing R12: 0x%" PRIx64, (uint64_t)func_addr);
+ if (!reg_ctx->WriteRegisterFromUnsigned(r12_reg_info, func_addr))
+ return false;
+
+ // Read TOC pointer value.
+ reg_value = reg_ctx->ReadRegisterAsUnsigned(r2_reg_info, 0);
+
+ // Write TOC pointer onto the stack.
+ uint64_t stack_offset;
+ if (GetByteOrder() == lldb::eByteOrderLittle)
+ stack_offset = 24;
+ else
+ stack_offset = 40;
+
+ if (log)
+ log->Printf("Writing R2 (TOC) at SP(0x%" PRIx64 ")+%d: 0x%" PRIx64,
+ (uint64_t)(sp + stack_offset), (int)stack_offset,
+ (uint64_t)reg_value);
+ if (!process_sp->WritePointerToMemory(sp + stack_offset, reg_value, error))
+ return false;
+
+ // Read the current SP value.
+ reg_value = reg_ctx->ReadRegisterAsUnsigned(sp_reg_info, 0);
+
+ // Save current SP onto the stack.
+ if (log)
+ log->Printf("Writing SP at SP(0x%" PRIx64 ")+0: 0x%" PRIx64, (uint64_t)sp,
+ (uint64_t)reg_value);
+ if (!process_sp->WritePointerToMemory(sp, reg_value, error))
+ return false;
+ // %r1 is set to the actual stack value.
if (log)
log->Printf("Writing SP: 0x%" PRIx64, (uint64_t)sp);
@@ -365,34 +255,23 @@ bool ABISysV_ppc64::GetArgumentValues(Thread &thread, ValueList &values) const {
if (!sp)
return false;
- addr_t current_stack_argument = sp + 48; // jump over return address
+ uint64_t stack_offset;
+ if (GetByteOrder() == lldb::eByteOrderLittle)
+ stack_offset = 32;
+ else
+ stack_offset = 48;
+ // jump over return address.
+ addr_t current_stack_argument = sp + stack_offset;
uint32_t argument_register_ids[8];
- 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];
- argument_register_ids[6] =
- reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG7)
- ->kinds[eRegisterKindLLDB];
- argument_register_ids[7] =
- reg_ctx->GetRegisterInfo(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_ARG8)
- ->kinds[eRegisterKindLLDB];
+ for (size_t i = 0; i < 8; ++i) {
+ argument_register_ids[i] =
+ reg_ctx
+ ->GetRegisterInfo(eRegisterKindGeneric,
+ LLDB_REGNUM_GENERIC_ARG1 + i)
+ ->kinds[eRegisterKindLLDB];
+ }
unsigned int current_argument_register = 0;
@@ -402,8 +281,8 @@ bool ABISysV_ppc64::GetArgumentValues(Thread &thread, ValueList &values) const {
if (!value)
return false;
- // We currently only support extracting values with Clang QualTypes.
- // Do we care about others?
+ // We currently only support extracting values with Clang QualTypes. Do we
+ // care about others?
CompilerType compiler_type = value->GetCompilerType();
if (!compiler_type)
return false;
@@ -501,8 +380,8 @@ Status ABISysV_ppc64::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
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.
+ // 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.");
}
@@ -510,367 +389,584 @@ Status ABISysV_ppc64::SetReturnValueObject(lldb::StackFrameSP &frame_sp,
return error;
}
-ValueObjectSP ABISysV_ppc64::GetReturnValueObjectSimple(
- Thread &thread, CompilerType &return_compiler_type) const {
- ValueObjectSP return_valobj_sp;
- Value value;
+//
+// ReturnValueExtractor
+//
- if (!return_compiler_type)
- return return_valobj_sp;
+namespace {
+
+#define LOG_PREFIX "ReturnValueExtractor: "
+
+class ReturnValueExtractor {
+ // This class represents a register, from which data may be extracted.
+ //
+ // It may be constructed by directly specifying its index (where 0 is the
+ // first register used to return values) or by specifying the offset of a
+ // given struct field, in which case the appropriated register index will be
+ // calculated.
+ class Register {
+ public:
+ enum Type {
+ GPR, // General Purpose Register
+ FPR // Floating Point Register
+ };
+
+ // main constructor
+ //
+ // offs - field offset in struct
+ Register(Type ty, uint32_t index, uint32_t offs, RegisterContext *reg_ctx,
+ ByteOrder byte_order)
+ : m_index(index), m_offs(offs % sizeof(uint64_t)),
+ m_avail(sizeof(uint64_t) - m_offs), m_type(ty), m_reg_ctx(reg_ctx),
+ m_byte_order(byte_order) {}
+
+ // explicit index, no offset
+ Register(Type ty, uint32_t index, RegisterContext *reg_ctx,
+ ByteOrder byte_order)
+ : Register(ty, index, 0, reg_ctx, byte_order) {}
+
+ // GPR, calculate index from offs
+ Register(uint32_t offs, RegisterContext *reg_ctx, ByteOrder byte_order)
+ : Register(GPR, offs / sizeof(uint64_t), offs, reg_ctx, byte_order) {}
+
+ uint32_t Index() const { return m_index; }
+
+ // register offset where data is located
+ uint32_t Offs() const { return m_offs; }
+
+ // available bytes in this register
+ uint32_t Avail() const { return m_avail; }
+
+ bool IsValid() const {
+ if (m_index > 7) {
+ LLDB_LOG(m_log, LOG_PREFIX
+ "No more than 8 registers should be used to return values");
+ return false;
+ }
+ return true;
+ }
- // value.SetContext (Value::eContextTypeClangType, return_value_type);
- value.SetCompilerType(return_compiler_type);
+ std::string GetName() const {
+ if (m_type == GPR)
+ return ("r" + llvm::Twine(m_index + 3)).str();
+ else
+ return ("f" + llvm::Twine(m_index + 1)).str();
+ }
- 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("r3", 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;
+ // get raw register data
+ bool GetRawData(uint64_t &raw_data) {
+ const RegisterInfo *reg_info =
+ m_reg_ctx->GetRegisterInfoByName(GetName());
+ if (!reg_info) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get RegisterInfo");
+ return false;
}
- } 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 *f1_info = reg_ctx->GetRegisterInfoByName("f1", 0);
- RegisterValue f1_value;
- if (reg_ctx->ReadRegister(f1_info, f1_value)) {
- DataExtractor data;
- if (f1_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;
- }
- }
- }
- }
+
+ RegisterValue reg_val;
+ if (!m_reg_ctx->ReadRegister(reg_info, reg_val)) {
+ LLDB_LOG(m_log, LOG_PREFIX "ReadRegister() failed");
+ return false;
}
+
+ Status error;
+ uint32_t rc = reg_val.GetAsMemoryData(
+ reg_info, &raw_data, sizeof(raw_data), m_byte_order, error);
+ if (rc != sizeof(raw_data)) {
+ LLDB_LOG(m_log, LOG_PREFIX "GetAsMemoryData() failed");
+ return false;
+ }
+
+ return true;
}
- if (success)
- return_valobj_sp = ValueObjectConstResult::Create(
- thread.GetStackFrameAtIndex(0).get(), value, ConstString(""));
- } else if (type_flags & eTypeIsPointer) {
- unsigned r3_id =
- reg_ctx->GetRegisterInfoByName("r3", 0)->kinds[eRegisterKindLLDB];
- value.GetScalar() =
- (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(r3_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("v2", 0);
- if (altivec_reg) {
- if (byte_size <= altivec_reg->byte_size) {
- ProcessSP process_sp(thread.GetProcess());
- if (process_sp) {
- std::unique_ptr<DataBufferHeap> 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);
- }
- }
- }
+ private:
+ uint32_t m_index;
+ uint32_t m_offs;
+ uint32_t m_avail;
+ Type m_type;
+ RegisterContext *m_reg_ctx;
+ ByteOrder m_byte_order;
+ Log *m_log =
+ lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ };
+
+ Register GetGPR(uint32_t index) const {
+ return Register(Register::GPR, index, m_reg_ctx, m_byte_order);
+ }
+
+ Register GetFPR(uint32_t index) const {
+ return Register(Register::FPR, index, m_reg_ctx, m_byte_order);
+ }
+
+ Register GetGPRByOffs(uint32_t offs) const {
+ return Register(offs, m_reg_ctx, m_byte_order);
+ }
+
+public:
+ // factory
+ static llvm::Expected<ReturnValueExtractor> Create(Thread &thread,
+ CompilerType &type) {
+ RegisterContext *reg_ctx = thread.GetRegisterContext().get();
+ if (!reg_ctx)
+ return llvm::make_error<llvm::StringError>(
+ LOG_PREFIX "Failed to get RegisterContext",
+ llvm::inconvertibleErrorCode());
+
+ ProcessSP process_sp = thread.GetProcess();
+ if (!process_sp)
+ return llvm::make_error<llvm::StringError>(
+ LOG_PREFIX "GetProcess() failed", llvm::inconvertibleErrorCode());
+
+ return ReturnValueExtractor(thread, type, reg_ctx, process_sp);
+ }
+
+ // main method: get value of the type specified at construction time
+ ValueObjectSP GetValue() {
+ const uint32_t type_flags = m_type.GetTypeInfo();
+
+ // call the appropriate type handler
+ ValueSP value_sp;
+ ValueObjectSP valobj_sp;
+ if (type_flags & eTypeIsScalar) {
+ if (type_flags & eTypeIsInteger) {
+ value_sp = GetIntegerValue(0);
+ } else if (type_flags & eTypeIsFloat) {
+ if (type_flags & eTypeIsComplex) {
+ LLDB_LOG(m_log, LOG_PREFIX "Complex numbers are not supported yet");
+ return ValueObjectSP();
+ } else {
+ value_sp = GetFloatValue(m_type, 0);
}
}
+ } else if (type_flags & eTypeIsPointer) {
+ value_sp = GetPointerValue(0);
}
+
+ if (value_sp) {
+ valobj_sp = ValueObjectConstResult::Create(
+ m_thread.GetStackFrameAtIndex(0).get(), *value_sp, ConstString(""));
+ } else if (type_flags & eTypeIsVector) {
+ valobj_sp = GetVectorValueObject();
+ } else if (type_flags & eTypeIsStructUnion || type_flags & eTypeIsClass) {
+ valobj_sp = GetStructValueObject();
+ }
+
+ return valobj_sp;
}
- return return_valobj_sp;
-}
+private:
+ // data
+ Thread &m_thread;
+ CompilerType &m_type;
+ uint64_t m_byte_size;
+ std::unique_ptr<DataBufferHeap> m_data_ap;
+ int32_t m_src_offs = 0;
+ int32_t m_dst_offs = 0;
+ bool m_packed = false;
+ Log *m_log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ RegisterContext *m_reg_ctx;
+ ProcessSP m_process_sp;
+ ByteOrder m_byte_order;
+ uint32_t m_addr_size;
+
+ // methods
+
+ // constructor
+ ReturnValueExtractor(Thread &thread, CompilerType &type,
+ RegisterContext *reg_ctx, ProcessSP process_sp)
+ : m_thread(thread), m_type(type),
+ m_byte_size(m_type.GetByteSize(nullptr)),
+ m_data_ap(new DataBufferHeap(m_byte_size, 0)), m_reg_ctx(reg_ctx),
+ m_process_sp(process_sp), m_byte_order(process_sp->GetByteOrder()),
+ m_addr_size(
+ process_sp->GetTarget().GetArchitecture().GetAddressByteSize()) {}
+
+ // build a new scalar value
+ ValueSP NewScalarValue(CompilerType &type) {
+ ValueSP value_sp(new Value);
+ value_sp->SetCompilerType(type);
+ value_sp->SetValueType(Value::eValueTypeScalar);
+ return value_sp;
+ }
-ValueObjectSP ABISysV_ppc64::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 *r3_info = reg_ctx_sp->GetRegisterInfoByName("r3", 0);
- const RegisterInfo *rdx_info =
- reg_ctx_sp->GetRegisterInfoByName("rdx", 0);
-
- RegisterValue r3_value, rdx_value;
- reg_ctx_sp->ReadRegister(r3_info, r3_value);
- reg_ctx_sp->ReadRegister(rdx_info, rdx_value);
-
- DataExtractor r3_data, rdx_data;
-
- r3_value.GetData(r3_data);
- rdx_value.GetData(rdx_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 r3/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 there are any unaligned fields, this is stored in memory.
- if (field_bit_offset % field_bit_width != 0) {
- is_memory = true;
- break;
+ // get an integer value in the specified register
+ ValueSP GetIntegerValue(uint32_t reg_index) {
+ uint64_t raw_value;
+ auto reg = GetGPR(reg_index);
+ if (!reg.GetRawData(raw_value))
+ return ValueSP();
+
+ // build value from data
+ ValueSP value_sp(NewScalarValue(m_type));
+
+ uint32_t type_flags = m_type.GetTypeInfo();
+ bool is_signed = (type_flags & eTypeIsSigned) != 0;
+
+ switch (m_byte_size) {
+ case sizeof(uint64_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int64_t)(raw_value);
+ else
+ value_sp->GetScalar() = (uint64_t)(raw_value);
+ break;
+
+ case sizeof(uint32_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int32_t)(raw_value & UINT32_MAX);
+ else
+ value_sp->GetScalar() = (uint32_t)(raw_value & UINT32_MAX);
+ break;
+
+ case sizeof(uint16_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int16_t)(raw_value & UINT16_MAX);
+ else
+ value_sp->GetScalar() = (uint16_t)(raw_value & UINT16_MAX);
+ break;
+
+ case sizeof(uint8_t):
+ if (is_signed)
+ value_sp->GetScalar() = (int8_t)(raw_value & UINT8_MAX);
+ else
+ value_sp->GetScalar() = (uint8_t)(raw_value & UINT8_MAX);
+ break;
+
+ default:
+ llvm_unreachable("Invalid integer size");
+ }
+
+ return value_sp;
+ }
+
+ // get a floating point value on the specified register
+ ValueSP GetFloatValue(CompilerType &type, uint32_t reg_index) {
+ uint64_t raw_data;
+ auto reg = GetFPR(reg_index);
+ if (!reg.GetRawData(raw_data))
+ return ValueSP();
+
+ // build value from data
+ ValueSP value_sp(NewScalarValue(type));
+
+ DataExtractor de(&raw_data, sizeof(raw_data), m_byte_order, m_addr_size);
+
+ offset_t offset = 0;
+ size_t byte_size = type.GetByteSize(nullptr);
+ switch (byte_size) {
+ case sizeof(float):
+ value_sp->GetScalar() = (float)de.GetDouble(&offset);
+ break;
+
+ case sizeof(double):
+ value_sp->GetScalar() = de.GetDouble(&offset);
+ break;
+
+ default:
+ llvm_unreachable("Invalid floating point size");
+ }
+
+ return value_sp;
+ }
+
+ // get pointer value from register
+ ValueSP GetPointerValue(uint32_t reg_index) {
+ uint64_t raw_data;
+ auto reg = GetGPR(reg_index);
+ if (!reg.GetRawData(raw_data))
+ return ValueSP();
+
+ // build value from raw data
+ ValueSP value_sp(NewScalarValue(m_type));
+ value_sp->GetScalar() = raw_data;
+ return value_sp;
+ }
+
+ // build the ValueObject from our data buffer
+ ValueObjectSP BuildValueObject() {
+ DataExtractor de(DataBufferSP(m_data_ap.release()), m_byte_order,
+ m_addr_size);
+ return ValueObjectConstResult::Create(&m_thread, m_type, ConstString(""),
+ de);
+ }
+
+ // get a vector return value
+ ValueObjectSP GetVectorValueObject() {
+ const uint32_t MAX_VRS = 2;
+
+ // get first V register used to return values
+ const RegisterInfo *vr[MAX_VRS];
+ vr[0] = m_reg_ctx->GetRegisterInfoByName("vr2");
+ if (!vr[0]) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get vr2 RegisterInfo");
+ return ValueObjectSP();
+ }
+
+ const uint32_t vr_size = vr[0]->byte_size;
+ size_t vrs = 1;
+ if (m_byte_size > 2 * vr_size) {
+ LLDB_LOG(
+ m_log, LOG_PREFIX
+ "Returning vectors that don't fit in 2 VR regs is not supported");
+ return ValueObjectSP();
+ }
+
+ // load vr3, if needed
+ if (m_byte_size > vr_size) {
+ vrs++;
+ vr[1] = m_reg_ctx->GetRegisterInfoByName("vr3");
+ if (!vr[1]) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get vr3 RegisterInfo");
+ return ValueObjectSP();
+ }
+ }
+
+ // Get the whole contents of vector registers and let the logic here
+ // arrange the data properly.
+
+ RegisterValue vr_val[MAX_VRS];
+ Status error;
+ std::unique_ptr<DataBufferHeap> vr_data(
+ new DataBufferHeap(vrs * vr_size, 0));
+
+ for (uint32_t i = 0; i < vrs; i++) {
+ if (!m_reg_ctx->ReadRegister(vr[i], vr_val[i])) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to read vector register contents");
+ return ValueObjectSP();
+ }
+ if (!vr_val[i].GetAsMemoryData(vr[i], vr_data->GetBytes() + i * vr_size,
+ vr_size, m_byte_order, error)) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to extract vector register bytes");
+ return ValueObjectSP();
+ }
+ }
+
+ // The compiler generated code seems to always put the vector elements at
+ // the end of the vector register, in case they don't occupy all of it.
+ // This offset variable handles this.
+ uint32_t offs = 0;
+ if (m_byte_size < vr_size)
+ offs = vr_size - m_byte_size;
+
+ // copy extracted data to our buffer
+ memcpy(m_data_ap->GetBytes(), vr_data->GetBytes() + offs, m_byte_size);
+ return BuildValueObject();
+ }
+
+ // get a struct return value
+ ValueObjectSP GetStructValueObject() {
+ // case 1: get from stack
+ if (m_byte_size > 2 * sizeof(uint64_t)) {
+ uint64_t addr;
+ auto reg = GetGPR(0);
+ if (!reg.GetRawData(addr))
+ return ValueObjectSP();
+
+ Status error;
+ size_t rc = m_process_sp->ReadMemory(addr, m_data_ap->GetBytes(),
+ m_byte_size, error);
+ if (rc != m_byte_size) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to read memory pointed by r3");
+ return ValueObjectSP();
+ }
+ return BuildValueObject();
+ }
+
+ // get number of children
+ const bool omit_empty_base_classes = true;
+ uint32_t n = m_type.GetNumChildren(omit_empty_base_classes);
+ if (!n) {
+ LLDB_LOG(m_log, LOG_PREFIX "No children found in struct");
+ return ValueObjectSP();
+ }
+
+ // case 2: homogeneous double or float aggregate
+ CompilerType elem_type;
+ if (m_type.IsHomogeneousAggregate(&elem_type)) {
+ uint32_t type_flags = elem_type.GetTypeInfo();
+ uint64_t elem_size = elem_type.GetByteSize(nullptr);
+ if (type_flags & eTypeIsComplex || !(type_flags & eTypeIsFloat)) {
+ LLDB_LOG(m_log,
+ LOG_PREFIX "Unexpected type found in homogeneous aggregate");
+ return ValueObjectSP();
+ }
+
+ for (uint32_t i = 0; i < n; i++) {
+ ValueSP val_sp = GetFloatValue(elem_type, i);
+ if (!val_sp)
+ return ValueObjectSP();
+
+ // copy to buffer
+ Status error;
+ size_t rc = val_sp->GetScalar().GetAsMemoryData(
+ m_data_ap->GetBytes() + m_dst_offs, elem_size, m_byte_order, error);
+ if (rc != elem_size) {
+ LLDB_LOG(m_log, LOG_PREFIX "Failed to get float data");
+ return ValueObjectSP();
}
+ m_dst_offs += elem_size;
+ }
+ return BuildValueObject();
+ }
- 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 = &r3_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;
+ // case 3: get from GPRs
+
+ // first, check if this is a packed struct or not
+ ClangASTContext *ast =
+ llvm::dyn_cast<ClangASTContext>(m_type.GetTypeSystem());
+ if (ast) {
+ clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(m_type);
+
+ if (record_decl) {
+ auto attrs = record_decl->attrs();
+ for (const auto &attr : attrs) {
+ if (attr->getKind() == clang::attr::Packed) {
+ m_packed = true;
break;
- } else if (field_bit_width == 64) {
- 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 = &r3_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 {
- 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);
- }
+ LLDB_LOG(m_log, LOG_PREFIX "{0} struct",
+ m_packed ? "packed" : "not packed");
+
+ for (uint32_t i = 0; i < n; i++) {
+ std::string name;
+ uint32_t size;
+ GetChildType(i, name, size);
+ // NOTE: the offset returned by GetChildCompilerTypeAtIndex()
+ // can't be used because it never considers alignment bytes
+ // between struct fields.
+ LLDB_LOG(m_log, LOG_PREFIX "field={0}, size={1}", name, size);
+ if (!ExtractField(size))
+ return ValueObjectSP();
}
- // FIXME: This is just taking a guess, r3 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 r3_id =
- reg_ctx_sp->GetRegisterInfoByName("r3", 0)->kinds[eRegisterKindLLDB];
- lldb::addr_t storage_addr =
- (uint64_t)thread.GetRegisterContext()->ReadRegisterAsUnsigned(r3_id,
- 0);
- return_valobj_sp = ValueObjectMemory::Create(
- &thread, "", Address(storage_addr, nullptr), return_compiler_type);
+ return BuildValueObject();
+ }
+
+ // extract 'size' bytes at 'offs' from GPRs
+ bool ExtractFromRegs(int32_t offs, uint32_t size, void *buf) {
+ while (size) {
+ auto reg = GetGPRByOffs(offs);
+ if (!reg.IsValid())
+ return false;
+
+ uint32_t n = std::min(reg.Avail(), size);
+ uint64_t raw_data;
+
+ if (!reg.GetRawData(raw_data))
+ return false;
+
+ memcpy(buf, (char *)&raw_data + reg.Offs(), n);
+ offs += n;
+ size -= n;
+ buf = (char *)buf + n;
}
+ return true;
}
- return return_valobj_sp;
+ // extract one field from GPRs and put it in our buffer
+ bool ExtractField(uint32_t size) {
+ auto reg = GetGPRByOffs(m_src_offs);
+ if (!reg.IsValid())
+ return false;
+
+ // handle padding
+ if (!m_packed) {
+ uint32_t n = m_src_offs % size;
+
+ // not 'size' bytes aligned
+ if (n) {
+ LLDB_LOG(m_log,
+ LOG_PREFIX "Extracting {0} alignment bytes at offset {1}", n,
+ m_src_offs);
+ // get alignment bytes
+ if (!ExtractFromRegs(m_src_offs, n, m_data_ap->GetBytes() + m_dst_offs))
+ return false;
+ m_src_offs += n;
+ m_dst_offs += n;
+ }
+ }
+
+ // get field
+ LLDB_LOG(m_log, LOG_PREFIX "Extracting {0} field bytes at offset {1}", size,
+ m_src_offs);
+ if (!ExtractFromRegs(m_src_offs, size, m_data_ap->GetBytes() + m_dst_offs))
+ return false;
+ m_src_offs += size;
+ m_dst_offs += size;
+ return true;
+ }
+
+ // get child
+ CompilerType GetChildType(uint32_t i, std::string &name, uint32_t &size) {
+ // GetChild constant inputs
+ const bool transparent_pointers = false;
+ const bool omit_empty_base_classes = true;
+ const bool ignore_array_bounds = false;
+ // GetChild output params
+ int32_t child_offs;
+ uint32_t child_bitfield_bit_size;
+ uint32_t child_bitfield_bit_offset;
+ bool child_is_base_class;
+ bool child_is_deref_of_parent;
+ ValueObject *valobj = nullptr;
+ uint64_t language_flags;
+ ExecutionContext exe_ctx;
+ m_thread.CalculateExecutionContext(exe_ctx);
+
+ return m_type.GetChildCompilerTypeAtIndex(
+ &exe_ctx, i, transparent_pointers, omit_empty_base_classes,
+ ignore_array_bounds, name, size, child_offs, child_bitfield_bit_size,
+ child_bitfield_bit_offset, child_is_base_class,
+ child_is_deref_of_parent, valobj, language_flags);
+ }
+};
+
+#undef LOG_PREFIX
+
+} // anonymous namespace
+
+ValueObjectSP
+ABISysV_ppc64::GetReturnValueObjectSimple(Thread &thread,
+ CompilerType &type) const {
+ if (!type)
+ return ValueObjectSP();
+
+ auto exp_extractor = ReturnValueExtractor::Create(thread, type);
+ if (!exp_extractor) {
+ Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+ LLDB_LOG_ERROR(log, exp_extractor.takeError(),
+ "Extracting return value failed: {0}");
+ return ValueObjectSP();
+ }
+
+ return exp_extractor.get().GetValue();
+}
+
+ValueObjectSP ABISysV_ppc64::GetReturnValueObjectImpl(
+ Thread &thread, CompilerType &return_compiler_type) const {
+ return GetReturnValueObjectSimple(thread, return_compiler_type);
}
bool ABISysV_ppc64::CreateFunctionEntryUnwindPlan(UnwindPlan &unwind_plan) {
unwind_plan.Clear();
unwind_plan.SetRegisterKind(eRegisterKindDWARF);
- uint32_t lr_reg_num = dwarf_lr;
- uint32_t sp_reg_num = dwarf_r1;
- uint32_t pc_reg_num = dwarf_pc;
+ uint32_t lr_reg_num;
+ uint32_t sp_reg_num;
+ uint32_t pc_reg_num;
+
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ lr_reg_num = ppc64le_dwarf::dwarf_lr_ppc64le;
+ sp_reg_num = ppc64le_dwarf::dwarf_r1_ppc64le;
+ pc_reg_num = ppc64le_dwarf::dwarf_pc_ppc64le;
+ } else {
+ lr_reg_num = ppc64_dwarf::dwarf_lr_ppc64;
+ sp_reg_num = ppc64_dwarf::dwarf_r1_ppc64;
+ pc_reg_num = ppc64_dwarf::dwarf_pc_ppc64;
+ }
UnwindPlan::RowSP row(new UnwindPlan::Row);
@@ -893,23 +989,33 @@ bool ABISysV_ppc64::CreateDefaultUnwindPlan(UnwindPlan &unwind_plan) {
unwind_plan.Clear();
unwind_plan.SetRegisterKind(eRegisterKindDWARF);
- uint32_t sp_reg_num = dwarf_r1;
- uint32_t pc_reg_num = dwarf_lr;
+ uint32_t sp_reg_num;
+ uint32_t pc_reg_num;
+ uint32_t cr_reg_num;
- UnwindPlan::RowSP row(new UnwindPlan::Row);
+ if (GetByteOrder() == lldb::eByteOrderLittle) {
+ sp_reg_num = ppc64le_dwarf::dwarf_r1_ppc64le;
+ pc_reg_num = ppc64le_dwarf::dwarf_lr_ppc64le;
+ cr_reg_num = ppc64le_dwarf::dwarf_cr_ppc64le;
+ } else {
+ sp_reg_num = ppc64_dwarf::dwarf_r1_ppc64;
+ pc_reg_num = ppc64_dwarf::dwarf_lr_ppc64;
+ cr_reg_num = ppc64_dwarf::dwarf_cr_ppc64;
+ }
+ UnwindPlan::RowSP row(new UnwindPlan::Row);
const int32_t ptr_size = 8;
row->GetCFAValue().SetIsRegisterDereferenced(sp_reg_num);
row->SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * 2, true);
row->SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true);
- row->SetRegisterLocationToAtCFAPlusOffset(dwarf_cr, ptr_size, true);
+ row->SetRegisterLocationToAtCFAPlusOffset(cr_reg_num, ptr_size, true);
unwind_plan.AppendRow(row);
unwind_plan.SetSourceName("ppc64 default unwind plan");
unwind_plan.SetSourcedFromCompiler(eLazyBoolNo);
unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo);
- unwind_plan.SetReturnAddressRegister(dwarf_lr);
+ unwind_plan.SetReturnAddressRegister(pc_reg_num);
return true;
}
@@ -919,10 +1025,9 @@ bool ABISysV_ppc64::RegisterIsVolatile(const RegisterInfo *reg_info) {
// See "Register Usage" in the
// "System V Application Binary Interface"
-// "64-bit PowerPC ELF Application Binary Interface Supplement"
-// current version is 1.9 released 2004 at
-// http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.pdf
-
+// "64-bit PowerPC ELF Application Binary Interface Supplement" current version
+// is 2 released 2015 at
+// https://members.openpowerfoundation.org/document/dl/576
bool ABISysV_ppc64::RegisterIsCalleeSaved(const RegisterInfo *reg_info) {
if (reg_info) {
// Preserved registers are :
@@ -954,7 +1059,7 @@ bool ABISysV_ppc64::RegisterIsCalleeSaved(const RegisterInfo *reg_info) {
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;
+ return false;
if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc
return true;
}