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-rw-r--r--libcxxabi/src/Unwind/DwarfInstructions.hpp760
1 files changed, 0 insertions, 760 deletions
diff --git a/libcxxabi/src/Unwind/DwarfInstructions.hpp b/libcxxabi/src/Unwind/DwarfInstructions.hpp
deleted file mode 100644
index 99737e0b66c..00000000000
--- a/libcxxabi/src/Unwind/DwarfInstructions.hpp
+++ /dev/null
@@ -1,760 +0,0 @@
-//===-------------------------- DwarfInstructions.hpp ---------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//
-// Processor specific interpretation of dwarf unwind info.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef __DWARF_INSTRUCTIONS_HPP__
-#define __DWARF_INSTRUCTIONS_HPP__
-
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "dwarf2.h"
-#include "AddressSpace.hpp"
-#include "Registers.hpp"
-#include "DwarfParser.hpp"
-#include "config.h"
-
-
-namespace libunwind {
-
-
-/// DwarfInstructions maps abtract dwarf unwind instructions to a particular
-/// architecture
-template <typename A, typename R>
-class DwarfInstructions {
-public:
- typedef typename A::pint_t pint_t;
- typedef typename A::sint_t sint_t;
-
- static int stepWithDwarf(A &addressSpace, pint_t pc, pint_t fdeStart,
- R &registers);
-
-private:
-
- enum {
- DW_X86_64_RET_ADDR = 16
- };
-
- enum {
- DW_X86_RET_ADDR = 8
- };
-
- typedef typename CFI_Parser<A>::RegisterLocation RegisterLocation;
- typedef typename CFI_Parser<A>::PrologInfo PrologInfo;
- typedef typename CFI_Parser<A>::FDE_Info FDE_Info;
- typedef typename CFI_Parser<A>::CIE_Info CIE_Info;
-
- static pint_t evaluateExpression(pint_t expression, A &addressSpace,
- const R &registers,
- pint_t initialStackValue);
- static pint_t getSavedRegister(A &addressSpace, const R &registers,
- pint_t cfa, const RegisterLocation &savedReg);
- static double getSavedFloatRegister(A &addressSpace, const R &registers,
- pint_t cfa, const RegisterLocation &savedReg);
- static v128 getSavedVectorRegister(A &addressSpace, const R &registers,
- pint_t cfa, const RegisterLocation &savedReg);
-
- static pint_t getCFA(A &addressSpace, const PrologInfo &prolog,
- const R &registers) {
- if (prolog.cfaRegister != 0)
- return (pint_t)((sint_t)registers.getRegister((int)prolog.cfaRegister) +
- prolog.cfaRegisterOffset);
- if (prolog.cfaExpression != 0)
- return evaluateExpression((pint_t)prolog.cfaExpression, addressSpace,
- registers, 0);
- assert(0 && "getCFA(): unknown location");
- __builtin_unreachable();
- }
-};
-
-
-template <typename A, typename R>
-typename A::pint_t DwarfInstructions<A, R>::getSavedRegister(
- A &addressSpace, const R &registers, pint_t cfa,
- const RegisterLocation &savedReg) {
- switch (savedReg.location) {
- case CFI_Parser<A>::kRegisterInCFA:
- return addressSpace.getP(cfa + (pint_t)savedReg.value);
-
- case CFI_Parser<A>::kRegisterAtExpression:
- return addressSpace.getP(
- evaluateExpression((pint_t)savedReg.value, addressSpace,
- registers, cfa));
-
- case CFI_Parser<A>::kRegisterIsExpression:
- return evaluateExpression((pint_t)savedReg.value, addressSpace,
- registers, cfa);
-
- case CFI_Parser<A>::kRegisterInRegister:
- return registers.getRegister((int)savedReg.value);
-
- case CFI_Parser<A>::kRegisterUnused:
- case CFI_Parser<A>::kRegisterOffsetFromCFA:
- // FIX ME
- break;
- }
- _LIBUNWIND_ABORT("unsupported restore location for register");
-}
-
-template <typename A, typename R>
-double DwarfInstructions<A, R>::getSavedFloatRegister(
- A &addressSpace, const R &registers, pint_t cfa,
- const RegisterLocation &savedReg) {
- switch (savedReg.location) {
- case CFI_Parser<A>::kRegisterInCFA:
- return addressSpace.getDouble(cfa + (pint_t)savedReg.value);
-
- case CFI_Parser<A>::kRegisterAtExpression:
- return addressSpace.getDouble(
- evaluateExpression((pint_t)savedReg.value, addressSpace,
- registers, cfa));
-
- case CFI_Parser<A>::kRegisterIsExpression:
- case CFI_Parser<A>::kRegisterUnused:
- case CFI_Parser<A>::kRegisterOffsetFromCFA:
- case CFI_Parser<A>::kRegisterInRegister:
- // FIX ME
- break;
- }
- _LIBUNWIND_ABORT("unsupported restore location for float register");
-}
-
-template <typename A, typename R>
-v128 DwarfInstructions<A, R>::getSavedVectorRegister(
- A &addressSpace, const R &registers, pint_t cfa,
- const RegisterLocation &savedReg) {
- switch (savedReg.location) {
- case CFI_Parser<A>::kRegisterInCFA:
- return addressSpace.getVector(cfa + (pint_t)savedReg.value);
-
- case CFI_Parser<A>::kRegisterAtExpression:
- return addressSpace.getVector(
- evaluateExpression((pint_t)savedReg.value, addressSpace,
- registers, cfa));
-
- case CFI_Parser<A>::kRegisterIsExpression:
- case CFI_Parser<A>::kRegisterUnused:
- case CFI_Parser<A>::kRegisterOffsetFromCFA:
- case CFI_Parser<A>::kRegisterInRegister:
- // FIX ME
- break;
- }
- _LIBUNWIND_ABORT("unsupported restore location for vector register");
-}
-
-template <typename A, typename R>
-int DwarfInstructions<A, R>::stepWithDwarf(A &addressSpace, pint_t pc,
- pint_t fdeStart, R &registers) {
- FDE_Info fdeInfo;
- CIE_Info cieInfo;
- if (CFI_Parser<A>::decodeFDE(addressSpace, fdeStart, &fdeInfo,
- &cieInfo) == NULL) {
- PrologInfo prolog;
- if (CFI_Parser<A>::parseFDEInstructions(addressSpace, fdeInfo, cieInfo, pc,
- &prolog)) {
- // get pointer to cfa (architecture specific)
- pint_t cfa = getCFA(addressSpace, prolog, registers);
-
- // restore registers that dwarf says were saved
- R newRegisters = registers;
- pint_t returnAddress = 0;
- const int lastReg = R::lastDwarfRegNum();
- assert((int)CFI_Parser<A>::kMaxRegisterNumber > lastReg &&
- "register range too large");
- assert(lastReg <= (int)cieInfo.returnAddressRegister &&
- "register range does not contain return address register");
- for (int i = 0; i <= lastReg; ++i) {
- if (prolog.savedRegisters[i].location !=
- CFI_Parser<A>::kRegisterUnused) {
- if (registers.validFloatRegister(i))
- newRegisters.setFloatRegister(
- i, getSavedFloatRegister(addressSpace, registers, cfa,
- prolog.savedRegisters[i]));
- else if (registers.validVectorRegister(i))
- newRegisters.setVectorRegister(
- i, getSavedVectorRegister(addressSpace, registers, cfa,
- prolog.savedRegisters[i]));
- else if (i == (int)cieInfo.returnAddressRegister)
- returnAddress = getSavedRegister(addressSpace, registers, cfa,
- prolog.savedRegisters[i]);
- else if (registers.validRegister(i))
- newRegisters.setRegister(
- i, getSavedRegister(addressSpace, registers, cfa,
- prolog.savedRegisters[i]));
- else
- return UNW_EBADREG;
- }
- }
-
- // By definition, the CFA is the stack pointer at the call site, so
- // restoring SP means setting it to CFA.
- newRegisters.setSP(cfa);
-
- // Return address is address after call site instruction, so setting IP to
- // that does simualates a return.
- newRegisters.setIP(returnAddress);
-
- // Simulate the step by replacing the register set with the new ones.
- registers = newRegisters;
-
- return UNW_STEP_SUCCESS;
- }
- }
- return UNW_EBADFRAME;
-}
-
-template <typename A, typename R>
-typename A::pint_t
-DwarfInstructions<A, R>::evaluateExpression(pint_t expression, A &addressSpace,
- const R &registers,
- pint_t initialStackValue) {
- const bool log = false;
- pint_t p = expression;
- pint_t expressionEnd = expression + 20; // temp, until len read
- pint_t length = (pint_t)addressSpace.getULEB128(p, expressionEnd);
- expressionEnd = p + length;
- if (log)
- fprintf(stderr, "evaluateExpression(): length=%" PRIu64 "\n",
- (uint64_t)length);
- pint_t stack[100];
- pint_t *sp = stack;
- *(++sp) = initialStackValue;
-
- while (p < expressionEnd) {
- if (log) {
- for (pint_t *t = sp; t > stack; --t) {
- fprintf(stderr, "sp[] = 0x%" PRIx64 "\n", (uint64_t)(*t));
- }
- }
- uint8_t opcode = addressSpace.get8(p++);
- sint_t svalue, svalue2;
- pint_t value;
- uint32_t reg;
- switch (opcode) {
- case DW_OP_addr:
- // push immediate address sized value
- value = addressSpace.getP(p);
- p += sizeof(pint_t);
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_deref:
- // pop stack, dereference, push result
- value = *sp--;
- *(++sp) = addressSpace.getP(value);
- if (log)
- fprintf(stderr, "dereference 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_const1u:
- // push immediate 1 byte value
- value = addressSpace.get8(p);
- p += 1;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_const1s:
- // push immediate 1 byte signed value
- svalue = (int8_t) addressSpace.get8(p);
- p += 1;
- *(++sp) = (pint_t)svalue;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_const2u:
- // push immediate 2 byte value
- value = addressSpace.get16(p);
- p += 2;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_const2s:
- // push immediate 2 byte signed value
- svalue = (int16_t) addressSpace.get16(p);
- p += 2;
- *(++sp) = (pint_t)svalue;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_const4u:
- // push immediate 4 byte value
- value = addressSpace.get32(p);
- p += 4;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_const4s:
- // push immediate 4 byte signed value
- svalue = (int32_t)addressSpace.get32(p);
- p += 4;
- *(++sp) = (pint_t)svalue;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_const8u:
- // push immediate 8 byte value
- value = (pint_t)addressSpace.get64(p);
- p += 8;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_const8s:
- // push immediate 8 byte signed value
- value = (pint_t)addressSpace.get64(p);
- p += 8;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_constu:
- // push immediate ULEB128 value
- value = (pint_t)addressSpace.getULEB128(p, expressionEnd);
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_consts:
- // push immediate SLEB128 value
- svalue = (sint_t)addressSpace.getSLEB128(p, expressionEnd);
- *(++sp) = (pint_t)svalue;
- if (log)
- fprintf(stderr, "push 0x%" PRIx64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_dup:
- // push top of stack
- value = *sp;
- *(++sp) = value;
- if (log)
- fprintf(stderr, "duplicate top of stack\n");
- break;
-
- case DW_OP_drop:
- // pop
- --sp;
- if (log)
- fprintf(stderr, "pop top of stack\n");
- break;
-
- case DW_OP_over:
- // dup second
- value = sp[-1];
- *(++sp) = value;
- if (log)
- fprintf(stderr, "duplicate second in stack\n");
- break;
-
- case DW_OP_pick:
- // pick from
- reg = addressSpace.get8(p);
- p += 1;
- value = sp[-reg];
- *(++sp) = value;
- if (log)
- fprintf(stderr, "duplicate %d in stack\n", reg);
- break;
-
- case DW_OP_swap:
- // swap top two
- value = sp[0];
- sp[0] = sp[-1];
- sp[-1] = value;
- if (log)
- fprintf(stderr, "swap top of stack\n");
- break;
-
- case DW_OP_rot:
- // rotate top three
- value = sp[0];
- sp[0] = sp[-1];
- sp[-1] = sp[-2];
- sp[-2] = value;
- if (log)
- fprintf(stderr, "rotate top three of stack\n");
- break;
-
- case DW_OP_xderef:
- // pop stack, dereference, push result
- value = *sp--;
- *sp = *((pint_t*)value);
- if (log)
- fprintf(stderr, "x-dereference 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_abs:
- svalue = (sint_t)*sp;
- if (svalue < 0)
- *sp = (pint_t)(-svalue);
- if (log)
- fprintf(stderr, "abs\n");
- break;
-
- case DW_OP_and:
- value = *sp--;
- *sp &= value;
- if (log)
- fprintf(stderr, "and\n");
- break;
-
- case DW_OP_div:
- svalue = (sint_t)(*sp--);
- svalue2 = (sint_t)*sp;
- *sp = (pint_t)(svalue2 / svalue);
- if (log)
- fprintf(stderr, "div\n");
- break;
-
- case DW_OP_minus:
- value = *sp--;
- *sp = *sp - value;
- if (log)
- fprintf(stderr, "minus\n");
- break;
-
- case DW_OP_mod:
- svalue = (sint_t)(*sp--);
- svalue2 = (sint_t)*sp;
- *sp = (pint_t)(svalue2 % svalue);
- if (log)
- fprintf(stderr, "module\n");
- break;
-
- case DW_OP_mul:
- svalue = (sint_t)(*sp--);
- svalue2 = (sint_t)*sp;
- *sp = (pint_t)(svalue2 * svalue);
- if (log)
- fprintf(stderr, "mul\n");
- break;
-
- case DW_OP_neg:
- *sp = 0 - *sp;
- if (log)
- fprintf(stderr, "neg\n");
- break;
-
- case DW_OP_not:
- svalue = (sint_t)(*sp);
- *sp = (pint_t)(~svalue);
- if (log)
- fprintf(stderr, "not\n");
- break;
-
- case DW_OP_or:
- value = *sp--;
- *sp |= value;
- if (log)
- fprintf(stderr, "or\n");
- break;
-
- case DW_OP_plus:
- value = *sp--;
- *sp += value;
- if (log)
- fprintf(stderr, "plus\n");
- break;
-
- case DW_OP_plus_uconst:
- // pop stack, add uelb128 constant, push result
- *sp += addressSpace.getULEB128(p, expressionEnd);
- if (log)
- fprintf(stderr, "add constant\n");
- break;
-
- case DW_OP_shl:
- value = *sp--;
- *sp = *sp << value;
- if (log)
- fprintf(stderr, "shift left\n");
- break;
-
- case DW_OP_shr:
- value = *sp--;
- *sp = *sp >> value;
- if (log)
- fprintf(stderr, "shift left\n");
- break;
-
- case DW_OP_shra:
- value = *sp--;
- svalue = (sint_t)*sp;
- *sp = (pint_t)(svalue >> value);
- if (log)
- fprintf(stderr, "shift left arithmetric\n");
- break;
-
- case DW_OP_xor:
- value = *sp--;
- *sp ^= value;
- if (log)
- fprintf(stderr, "xor\n");
- break;
-
- case DW_OP_skip:
- svalue = (int16_t) addressSpace.get16(p);
- p += 2;
- p = (pint_t)((sint_t)p + svalue);
- if (log)
- fprintf(stderr, "skip %" PRIu64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_bra:
- svalue = (int16_t) addressSpace.get16(p);
- p += 2;
- if (*sp--)
- p = (pint_t)((sint_t)p + svalue);
- if (log)
- fprintf(stderr, "bra %" PRIu64 "\n", (uint64_t)svalue);
- break;
-
- case DW_OP_eq:
- value = *sp--;
- *sp = (*sp == value);
- if (log)
- fprintf(stderr, "eq\n");
- break;
-
- case DW_OP_ge:
- value = *sp--;
- *sp = (*sp >= value);
- if (log)
- fprintf(stderr, "ge\n");
- break;
-
- case DW_OP_gt:
- value = *sp--;
- *sp = (*sp > value);
- if (log)
- fprintf(stderr, "gt\n");
- break;
-
- case DW_OP_le:
- value = *sp--;
- *sp = (*sp <= value);
- if (log)
- fprintf(stderr, "le\n");
- break;
-
- case DW_OP_lt:
- value = *sp--;
- *sp = (*sp < value);
- if (log)
- fprintf(stderr, "lt\n");
- break;
-
- case DW_OP_ne:
- value = *sp--;
- *sp = (*sp != value);
- if (log)
- fprintf(stderr, "ne\n");
- break;
-
- case DW_OP_lit0:
- case DW_OP_lit1:
- case DW_OP_lit2:
- case DW_OP_lit3:
- case DW_OP_lit4:
- case DW_OP_lit5:
- case DW_OP_lit6:
- case DW_OP_lit7:
- case DW_OP_lit8:
- case DW_OP_lit9:
- case DW_OP_lit10:
- case DW_OP_lit11:
- case DW_OP_lit12:
- case DW_OP_lit13:
- case DW_OP_lit14:
- case DW_OP_lit15:
- case DW_OP_lit16:
- case DW_OP_lit17:
- case DW_OP_lit18:
- case DW_OP_lit19:
- case DW_OP_lit20:
- case DW_OP_lit21:
- case DW_OP_lit22:
- case DW_OP_lit23:
- case DW_OP_lit24:
- case DW_OP_lit25:
- case DW_OP_lit26:
- case DW_OP_lit27:
- case DW_OP_lit28:
- case DW_OP_lit29:
- case DW_OP_lit30:
- case DW_OP_lit31:
- value = static_cast<pint_t>(opcode - DW_OP_lit0);
- *(++sp) = value;
- if (log)
- fprintf(stderr, "push literal 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_reg0:
- case DW_OP_reg1:
- case DW_OP_reg2:
- case DW_OP_reg3:
- case DW_OP_reg4:
- case DW_OP_reg5:
- case DW_OP_reg6:
- case DW_OP_reg7:
- case DW_OP_reg8:
- case DW_OP_reg9:
- case DW_OP_reg10:
- case DW_OP_reg11:
- case DW_OP_reg12:
- case DW_OP_reg13:
- case DW_OP_reg14:
- case DW_OP_reg15:
- case DW_OP_reg16:
- case DW_OP_reg17:
- case DW_OP_reg18:
- case DW_OP_reg19:
- case DW_OP_reg20:
- case DW_OP_reg21:
- case DW_OP_reg22:
- case DW_OP_reg23:
- case DW_OP_reg24:
- case DW_OP_reg25:
- case DW_OP_reg26:
- case DW_OP_reg27:
- case DW_OP_reg28:
- case DW_OP_reg29:
- case DW_OP_reg30:
- case DW_OP_reg31:
- reg = static_cast<uint32_t>(opcode - DW_OP_reg0);
- *(++sp) = registers.getRegister((int)reg);
- if (log)
- fprintf(stderr, "push reg %d\n", reg);
- break;
-
- case DW_OP_regx:
- reg = static_cast<uint32_t>(addressSpace.getULEB128(p, expressionEnd));
- *(++sp) = registers.getRegister((int)reg);
- if (log)
- fprintf(stderr, "push reg %d + 0x%" PRIx64 "\n", reg, (uint64_t)svalue);
- break;
-
- case DW_OP_breg0:
- case DW_OP_breg1:
- case DW_OP_breg2:
- case DW_OP_breg3:
- case DW_OP_breg4:
- case DW_OP_breg5:
- case DW_OP_breg6:
- case DW_OP_breg7:
- case DW_OP_breg8:
- case DW_OP_breg9:
- case DW_OP_breg10:
- case DW_OP_breg11:
- case DW_OP_breg12:
- case DW_OP_breg13:
- case DW_OP_breg14:
- case DW_OP_breg15:
- case DW_OP_breg16:
- case DW_OP_breg17:
- case DW_OP_breg18:
- case DW_OP_breg19:
- case DW_OP_breg20:
- case DW_OP_breg21:
- case DW_OP_breg22:
- case DW_OP_breg23:
- case DW_OP_breg24:
- case DW_OP_breg25:
- case DW_OP_breg26:
- case DW_OP_breg27:
- case DW_OP_breg28:
- case DW_OP_breg29:
- case DW_OP_breg30:
- case DW_OP_breg31:
- reg = static_cast<uint32_t>(opcode - DW_OP_breg0);
- svalue = (sint_t)addressSpace.getSLEB128(p, expressionEnd);
- svalue += static_cast<sint_t>(registers.getRegister((int)reg));
- *(++sp) = (pint_t)(svalue);
- if (log)
- fprintf(stderr, "push reg %d + 0x%" PRIx64 "\n", reg, (uint64_t)svalue);
- break;
-
- case DW_OP_bregx:
- reg = static_cast<uint32_t>(addressSpace.getULEB128(p, expressionEnd));
- svalue = (sint_t)addressSpace.getSLEB128(p, expressionEnd);
- svalue += static_cast<sint_t>(registers.getRegister((int)reg));
- *(++sp) = (pint_t)(svalue);
- if (log)
- fprintf(stderr, "push reg %d + 0x%" PRIx64 "\n", reg, (uint64_t)svalue);
- break;
-
- case DW_OP_fbreg:
- _LIBUNWIND_ABORT("DW_OP_fbreg not implemented");
- break;
-
- case DW_OP_piece:
- _LIBUNWIND_ABORT("DW_OP_piece not implemented");
- break;
-
- case DW_OP_deref_size:
- // pop stack, dereference, push result
- value = *sp--;
- switch (addressSpace.get8(p++)) {
- case 1:
- value = addressSpace.get8(value);
- break;
- case 2:
- value = addressSpace.get16(value);
- break;
- case 4:
- value = addressSpace.get32(value);
- break;
- case 8:
- value = (pint_t)addressSpace.get64(value);
- break;
- default:
- _LIBUNWIND_ABORT("DW_OP_deref_size with bad size");
- }
- *(++sp) = value;
- if (log)
- fprintf(stderr, "sized dereference 0x%" PRIx64 "\n", (uint64_t)value);
- break;
-
- case DW_OP_xderef_size:
- case DW_OP_nop:
- case DW_OP_push_object_addres:
- case DW_OP_call2:
- case DW_OP_call4:
- case DW_OP_call_ref:
- default:
- _LIBUNWIND_ABORT("dwarf opcode not implemented");
- }
-
- }
- if (log)
- fprintf(stderr, "expression evaluates to 0x%" PRIx64 "\n", (uint64_t)*sp);
- return *sp;
-}
-
-
-
-} // namespace libunwind
-
-#endif // __DWARF_INSTRUCTIONS_HPP__
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