You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
321 lines
12 KiB
321 lines
12 KiB
//===-- RuntimeDyldELFMips.cpp ---- ELF/Mips specific code. -----*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "RuntimeDyldELFMips.h"
|
|
#include "llvm/BinaryFormat/ELF.h"
|
|
|
|
#define DEBUG_TYPE "dyld"
|
|
|
|
void RuntimeDyldELFMips::resolveRelocation(const RelocationEntry &RE,
|
|
uint64_t Value) {
|
|
const SectionEntry &Section = Sections[RE.SectionID];
|
|
if (IsMipsO32ABI)
|
|
resolveMIPSO32Relocation(Section, RE.Offset, Value, RE.RelType, RE.Addend);
|
|
else if (IsMipsN32ABI) {
|
|
resolveMIPSN32Relocation(Section, RE.Offset, Value, RE.RelType, RE.Addend,
|
|
RE.SymOffset, RE.SectionID);
|
|
} else if (IsMipsN64ABI)
|
|
resolveMIPSN64Relocation(Section, RE.Offset, Value, RE.RelType, RE.Addend,
|
|
RE.SymOffset, RE.SectionID);
|
|
else
|
|
llvm_unreachable("Mips ABI not handled");
|
|
}
|
|
|
|
uint64_t RuntimeDyldELFMips::evaluateRelocation(const RelocationEntry &RE,
|
|
uint64_t Value,
|
|
uint64_t Addend) {
|
|
if (IsMipsN32ABI) {
|
|
const SectionEntry &Section = Sections[RE.SectionID];
|
|
Value = evaluateMIPS64Relocation(Section, RE.Offset, Value, RE.RelType,
|
|
Addend, RE.SymOffset, RE.SectionID);
|
|
return Value;
|
|
}
|
|
llvm_unreachable("Not reachable");
|
|
}
|
|
|
|
void RuntimeDyldELFMips::applyRelocation(const RelocationEntry &RE,
|
|
uint64_t Value) {
|
|
if (IsMipsN32ABI) {
|
|
const SectionEntry &Section = Sections[RE.SectionID];
|
|
applyMIPSRelocation(Section.getAddressWithOffset(RE.Offset), Value,
|
|
RE.RelType);
|
|
return;
|
|
}
|
|
llvm_unreachable("Not reachable");
|
|
}
|
|
|
|
int64_t
|
|
RuntimeDyldELFMips::evaluateMIPS32Relocation(const SectionEntry &Section,
|
|
uint64_t Offset, uint64_t Value,
|
|
uint32_t Type) {
|
|
|
|
LLVM_DEBUG(dbgs() << "evaluateMIPS32Relocation, LocalAddress: 0x"
|
|
<< format("%llx", Section.getAddressWithOffset(Offset))
|
|
<< " FinalAddress: 0x"
|
|
<< format("%llx", Section.getLoadAddressWithOffset(Offset))
|
|
<< " Value: 0x" << format("%llx", Value) << " Type: 0x"
|
|
<< format("%x", Type) << "\n");
|
|
|
|
switch (Type) {
|
|
default:
|
|
llvm_unreachable("Unknown relocation type!");
|
|
return Value;
|
|
case ELF::R_MIPS_32:
|
|
return Value;
|
|
case ELF::R_MIPS_26:
|
|
return Value >> 2;
|
|
case ELF::R_MIPS_HI16:
|
|
// Get the higher 16-bits. Also add 1 if bit 15 is 1.
|
|
return (Value + 0x8000) >> 16;
|
|
case ELF::R_MIPS_LO16:
|
|
return Value;
|
|
case ELF::R_MIPS_PC32: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return Value - FinalAddress;
|
|
}
|
|
case ELF::R_MIPS_PC16: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value - FinalAddress) >> 2;
|
|
}
|
|
case ELF::R_MIPS_PC19_S2: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value - (FinalAddress & ~0x3)) >> 2;
|
|
}
|
|
case ELF::R_MIPS_PC21_S2: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value - FinalAddress) >> 2;
|
|
}
|
|
case ELF::R_MIPS_PC26_S2: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value - FinalAddress) >> 2;
|
|
}
|
|
case ELF::R_MIPS_PCHI16: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value - FinalAddress + 0x8000) >> 16;
|
|
}
|
|
case ELF::R_MIPS_PCLO16: {
|
|
uint32_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return Value - FinalAddress;
|
|
}
|
|
}
|
|
}
|
|
|
|
int64_t RuntimeDyldELFMips::evaluateMIPS64Relocation(
|
|
const SectionEntry &Section, uint64_t Offset, uint64_t Value, uint32_t Type,
|
|
int64_t Addend, uint64_t SymOffset, SID SectionID) {
|
|
|
|
LLVM_DEBUG(dbgs() << "evaluateMIPS64Relocation, LocalAddress: 0x"
|
|
<< format("%llx", Section.getAddressWithOffset(Offset))
|
|
<< " FinalAddress: 0x"
|
|
<< format("%llx", Section.getLoadAddressWithOffset(Offset))
|
|
<< " Value: 0x" << format("%llx", Value) << " Type: 0x"
|
|
<< format("%x", Type) << " Addend: 0x"
|
|
<< format("%llx", Addend)
|
|
<< " Offset: " << format("%llx" PRIx64, Offset)
|
|
<< " SID: " << format("%d", SectionID)
|
|
<< " SymOffset: " << format("%x", SymOffset) << "\n");
|
|
|
|
switch (Type) {
|
|
default:
|
|
llvm_unreachable("Not implemented relocation type!");
|
|
break;
|
|
case ELF::R_MIPS_JALR:
|
|
case ELF::R_MIPS_NONE:
|
|
break;
|
|
case ELF::R_MIPS_32:
|
|
case ELF::R_MIPS_64:
|
|
return Value + Addend;
|
|
case ELF::R_MIPS_26:
|
|
return ((Value + Addend) >> 2) & 0x3ffffff;
|
|
case ELF::R_MIPS_GPREL16: {
|
|
uint64_t GOTAddr = getSectionLoadAddress(SectionToGOTMap[SectionID]);
|
|
return Value + Addend - (GOTAddr + 0x7ff0);
|
|
}
|
|
case ELF::R_MIPS_SUB:
|
|
return Value - Addend;
|
|
case ELF::R_MIPS_HI16:
|
|
// Get the higher 16-bits. Also add 1 if bit 15 is 1.
|
|
return ((Value + Addend + 0x8000) >> 16) & 0xffff;
|
|
case ELF::R_MIPS_LO16:
|
|
return (Value + Addend) & 0xffff;
|
|
case ELF::R_MIPS_HIGHER:
|
|
return ((Value + Addend + 0x80008000) >> 32) & 0xffff;
|
|
case ELF::R_MIPS_HIGHEST:
|
|
return ((Value + Addend + 0x800080008000) >> 48) & 0xffff;
|
|
case ELF::R_MIPS_CALL16:
|
|
case ELF::R_MIPS_GOT_DISP:
|
|
case ELF::R_MIPS_GOT_PAGE: {
|
|
uint8_t *LocalGOTAddr =
|
|
getSectionAddress(SectionToGOTMap[SectionID]) + SymOffset;
|
|
uint64_t GOTEntry = readBytesUnaligned(LocalGOTAddr, getGOTEntrySize());
|
|
|
|
Value += Addend;
|
|
if (Type == ELF::R_MIPS_GOT_PAGE)
|
|
Value = (Value + 0x8000) & ~0xffff;
|
|
|
|
if (GOTEntry)
|
|
assert(GOTEntry == Value &&
|
|
"GOT entry has two different addresses.");
|
|
else
|
|
writeBytesUnaligned(Value, LocalGOTAddr, getGOTEntrySize());
|
|
|
|
return (SymOffset - 0x7ff0) & 0xffff;
|
|
}
|
|
case ELF::R_MIPS_GOT_OFST: {
|
|
int64_t page = (Value + Addend + 0x8000) & ~0xffff;
|
|
return (Value + Addend - page) & 0xffff;
|
|
}
|
|
case ELF::R_MIPS_GPREL32: {
|
|
uint64_t GOTAddr = getSectionLoadAddress(SectionToGOTMap[SectionID]);
|
|
return Value + Addend - (GOTAddr + 0x7ff0);
|
|
}
|
|
case ELF::R_MIPS_PC16: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - FinalAddress) >> 2) & 0xffff;
|
|
}
|
|
case ELF::R_MIPS_PC32: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return Value + Addend - FinalAddress;
|
|
}
|
|
case ELF::R_MIPS_PC18_S3: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - (FinalAddress & ~0x7)) >> 3) & 0x3ffff;
|
|
}
|
|
case ELF::R_MIPS_PC19_S2: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - (FinalAddress & ~0x3)) >> 2) & 0x7ffff;
|
|
}
|
|
case ELF::R_MIPS_PC21_S2: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - FinalAddress) >> 2) & 0x1fffff;
|
|
}
|
|
case ELF::R_MIPS_PC26_S2: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - FinalAddress) >> 2) & 0x3ffffff;
|
|
}
|
|
case ELF::R_MIPS_PCHI16: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return ((Value + Addend - FinalAddress + 0x8000) >> 16) & 0xffff;
|
|
}
|
|
case ELF::R_MIPS_PCLO16: {
|
|
uint64_t FinalAddress = Section.getLoadAddressWithOffset(Offset);
|
|
return (Value + Addend - FinalAddress) & 0xffff;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void RuntimeDyldELFMips::applyMIPSRelocation(uint8_t *TargetPtr, int64_t Value,
|
|
uint32_t Type) {
|
|
uint32_t Insn = readBytesUnaligned(TargetPtr, 4);
|
|
|
|
switch (Type) {
|
|
default:
|
|
llvm_unreachable("Unknown relocation type!");
|
|
break;
|
|
case ELF::R_MIPS_GPREL16:
|
|
case ELF::R_MIPS_HI16:
|
|
case ELF::R_MIPS_LO16:
|
|
case ELF::R_MIPS_HIGHER:
|
|
case ELF::R_MIPS_HIGHEST:
|
|
case ELF::R_MIPS_PC16:
|
|
case ELF::R_MIPS_PCHI16:
|
|
case ELF::R_MIPS_PCLO16:
|
|
case ELF::R_MIPS_CALL16:
|
|
case ELF::R_MIPS_GOT_DISP:
|
|
case ELF::R_MIPS_GOT_PAGE:
|
|
case ELF::R_MIPS_GOT_OFST:
|
|
Insn = (Insn & 0xffff0000) | (Value & 0x0000ffff);
|
|
writeBytesUnaligned(Insn, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_PC18_S3:
|
|
Insn = (Insn & 0xfffc0000) | (Value & 0x0003ffff);
|
|
writeBytesUnaligned(Insn, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_PC19_S2:
|
|
Insn = (Insn & 0xfff80000) | (Value & 0x0007ffff);
|
|
writeBytesUnaligned(Insn, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_PC21_S2:
|
|
Insn = (Insn & 0xffe00000) | (Value & 0x001fffff);
|
|
writeBytesUnaligned(Insn, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_26:
|
|
case ELF::R_MIPS_PC26_S2:
|
|
Insn = (Insn & 0xfc000000) | (Value & 0x03ffffff);
|
|
writeBytesUnaligned(Insn, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_32:
|
|
case ELF::R_MIPS_GPREL32:
|
|
case ELF::R_MIPS_PC32:
|
|
writeBytesUnaligned(Value & 0xffffffff, TargetPtr, 4);
|
|
break;
|
|
case ELF::R_MIPS_64:
|
|
case ELF::R_MIPS_SUB:
|
|
writeBytesUnaligned(Value, TargetPtr, 8);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void RuntimeDyldELFMips::resolveMIPSN32Relocation(
|
|
const SectionEntry &Section, uint64_t Offset, uint64_t Value, uint32_t Type,
|
|
int64_t Addend, uint64_t SymOffset, SID SectionID) {
|
|
int64_t CalculatedValue = evaluateMIPS64Relocation(
|
|
Section, Offset, Value, Type, Addend, SymOffset, SectionID);
|
|
applyMIPSRelocation(Section.getAddressWithOffset(Offset), CalculatedValue,
|
|
Type);
|
|
}
|
|
|
|
void RuntimeDyldELFMips::resolveMIPSN64Relocation(
|
|
const SectionEntry &Section, uint64_t Offset, uint64_t Value, uint32_t Type,
|
|
int64_t Addend, uint64_t SymOffset, SID SectionID) {
|
|
uint32_t r_type = Type & 0xff;
|
|
uint32_t r_type2 = (Type >> 8) & 0xff;
|
|
uint32_t r_type3 = (Type >> 16) & 0xff;
|
|
|
|
// RelType is used to keep information for which relocation type we are
|
|
// applying relocation.
|
|
uint32_t RelType = r_type;
|
|
int64_t CalculatedValue = evaluateMIPS64Relocation(Section, Offset, Value,
|
|
RelType, Addend,
|
|
SymOffset, SectionID);
|
|
if (r_type2 != ELF::R_MIPS_NONE) {
|
|
RelType = r_type2;
|
|
CalculatedValue = evaluateMIPS64Relocation(Section, Offset, 0, RelType,
|
|
CalculatedValue, SymOffset,
|
|
SectionID);
|
|
}
|
|
if (r_type3 != ELF::R_MIPS_NONE) {
|
|
RelType = r_type3;
|
|
CalculatedValue = evaluateMIPS64Relocation(Section, Offset, 0, RelType,
|
|
CalculatedValue, SymOffset,
|
|
SectionID);
|
|
}
|
|
applyMIPSRelocation(Section.getAddressWithOffset(Offset), CalculatedValue,
|
|
RelType);
|
|
}
|
|
|
|
void RuntimeDyldELFMips::resolveMIPSO32Relocation(const SectionEntry &Section,
|
|
uint64_t Offset,
|
|
uint32_t Value, uint32_t Type,
|
|
int32_t Addend) {
|
|
uint8_t *TargetPtr = Section.getAddressWithOffset(Offset);
|
|
Value += Addend;
|
|
|
|
LLVM_DEBUG(dbgs() << "resolveMIPSO32Relocation, LocalAddress: "
|
|
<< Section.getAddressWithOffset(Offset) << " FinalAddress: "
|
|
<< format("%p", Section.getLoadAddressWithOffset(Offset))
|
|
<< " Value: " << format("%x", Value) << " Type: "
|
|
<< format("%x", Type) << " Addend: " << format("%x", Addend)
|
|
<< " SymOffset: " << format("%x", Offset) << "\n");
|
|
|
|
Value = evaluateMIPS32Relocation(Section, Offset, Value, Type);
|
|
|
|
applyMIPSRelocation(TargetPtr, Value, Type);
|
|
}
|