forked from OSchip/llvm-project
Add code to llvm-objdump so the -section option with -macho will dump literal pointer sections
with the Mach-O S_LITERAL_POINTERS section type. Also fix the printing of the leading addresses for literal sections to be consistent and not print the 0x prefix. Updated test cases to match. llvm-svn: 229548
This commit is contained in:
Kevin Enderby
parent
9f61520d40
commit
578fe5a303
|
|
@ -1,4 +1,4 @@
|
|||
RUN: llvm-objdump -m -section __TEXT,__cstring %p/Inputs/hello.obj.macho-x86_64 | FileCheck %s
|
||||
|
||||
CHECK: Contents of (__TEXT,__cstring) section
|
||||
CHECK: 0x000000000000003b Hello world\n
|
||||
CHECK: 000000000000003b Hello world\n
|
||||
|
|
|
|||
|
|
@ -0,0 +1,34 @@
|
|||
# RUN: llvm-mc < %s -triple i386-apple-darwin -filetype=obj | llvm-objdump -m -section __DATA,__litp - | FileCheck %s
|
||||
|
||||
.cstring
|
||||
L1: .asciz "Hello world\n"
|
||||
|
||||
.literal4
|
||||
.align 2
|
||||
L2: .float 4.0
|
||||
|
||||
.literal8
|
||||
.align 3
|
||||
L3: .double 8.0
|
||||
|
||||
.literal16
|
||||
.align 4
|
||||
L4: .long 0x10000016, 0x20000016, 0x30000016, 0x40000016
|
||||
|
||||
.const
|
||||
L5: .asciz "const non-literal string"
|
||||
|
||||
.section __DATA,__litp, literal_pointers
|
||||
.align 2
|
||||
.long L1
|
||||
.long L2
|
||||
.long L3
|
||||
.long L4
|
||||
.long L5
|
||||
|
||||
# CHECK: Contents of (__DATA,__litp) section
|
||||
# CHECK: 0000004c __TEXT:__cstring:Hello world\n
|
||||
# CHECK: 00000050 __TEXT:__literal4:0x40800000
|
||||
# CHECK: 00000054 __TEXT:__literal8:0x00000000 0x40200000
|
||||
# CHECK: 00000058 __TEXT:__literal16:0x10000016 0x20000016 0x30000016 0x40000016
|
||||
# CHECK: 0000005c 0x30 (not in a literal section)
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
# RUN: llvm-mc < %s -triple x86_64-apple-darwin -filetype=obj | llvm-objdump -m -section __DATA,__litp - | FileCheck %s
|
||||
|
||||
.cstring
|
||||
L1: .asciz "Hello world\n"
|
||||
|
||||
.literal4
|
||||
.align 2
|
||||
L2: .float 4.0
|
||||
|
||||
.literal8
|
||||
.align 3
|
||||
L3: .double 8.0
|
||||
|
||||
.literal16
|
||||
.align 4
|
||||
L4: .long 0x10000016, 0x20000016, 0x30000016, 0x40000016
|
||||
|
||||
.const
|
||||
L5: .asciz "const non-literal string"
|
||||
|
||||
.section __DATA,__litp, literal_pointers
|
||||
.align 3
|
||||
.quad L1
|
||||
.quad L2
|
||||
.quad L3
|
||||
.quad L4
|
||||
.quad L5
|
||||
|
||||
# CHECK: Contents of (__DATA,__litp) section
|
||||
# CHECK: 0000000000000050 __TEXT:__cstring:Hello world\n
|
||||
# CHECK: 0000000000000058 __TEXT:__literal4:0x40800000
|
||||
# CHECK: 0000000000000060 __TEXT:__literal8:0x00000000 0x40200000
|
||||
# CHECK: 0000000000000068 __TEXT:__literal16:0x10000016 0x20000016 0x30000016 0x40000016
|
||||
# CHECK: 0000000000000070 0x30 (not in a literal section)
|
||||
|
|
@ -11,12 +11,12 @@
|
|||
.long 0x7f800001
|
||||
|
||||
# CHECK-LIT4: Contents of (__TEXT,__literal4) section
|
||||
# CHECK-LIT4: 0x0000000000000000 0x40200000
|
||||
# CHECK-LIT4: 0x0000000000000004 0x41040000
|
||||
# CHECK-LIT4: 0x0000000000000008 0x7f800000
|
||||
# CHECK-LIT4: 0x000000000000000c 0xff800000
|
||||
# CHECK-LIT4: 0x0000000000000010 0x7fc00000
|
||||
# CHECK-LIT4: 0x0000000000000014 0x7f800001
|
||||
# CHECK-LIT4: 0000000000000000 0x40200000
|
||||
# CHECK-LIT4: 0000000000000004 0x41040000
|
||||
# CHECK-LIT4: 0000000000000008 0x7f800000
|
||||
# CHECK-LIT4: 000000000000000c 0xff800000
|
||||
# CHECK-LIT4: 0000000000000010 0x7fc00000
|
||||
# CHECK-LIT4: 0000000000000014 0x7f800001
|
||||
|
||||
.literal8
|
||||
.double 2.5
|
||||
|
|
@ -31,12 +31,12 @@
|
|||
.long 0x7ff00000
|
||||
|
||||
# CHECK-LIT8: Contents of (__TEXT,__literal8) section
|
||||
# CHECK-LIT8: 0x0000000000000018 0x00000000 0x40040000
|
||||
# CHECK-LIT8: 0x0000000000000020 0x00000000 0x40208000
|
||||
# CHECK-LIT8: 0x0000000000000028 0x00000000 0x7ff00000
|
||||
# CHECK-LIT8: 0x0000000000000030 0x00000000 0xfff00000
|
||||
# CHECK-LIT8: 0x0000000000000038 0x00000000 0x7ff80000
|
||||
# CHECK-LIT8: 0x0000000000000040 0x00000001 0x7ff00000
|
||||
# CHECK-LIT8: 0000000000000018 0x00000000 0x40040000
|
||||
# CHECK-LIT8: 0000000000000020 0x00000000 0x40208000
|
||||
# CHECK-LIT8: 0000000000000028 0x00000000 0x7ff00000
|
||||
# CHECK-LIT8: 0000000000000030 0x00000000 0xfff00000
|
||||
# CHECK-LIT8: 0000000000000038 0x00000000 0x7ff80000
|
||||
# CHECK-LIT8: 0000000000000040 0x00000001 0x7ff00000
|
||||
|
||||
.literal16
|
||||
.long 1
|
||||
|
|
@ -45,4 +45,4 @@
|
|||
.long 4
|
||||
|
||||
# CHECK-LIT16: Contents of (__TEXT,__literal16) section
|
||||
# CHECK-LIT16: 0x0000000000000050 0x00000001 0x00000002 0x00000003 0x00000004
|
||||
# CHECK-LIT16: 0000000000000050 0x00000001 0x00000002 0x00000003 0x00000004
|
||||
|
|
|
|||
|
|
@ -537,22 +537,25 @@ static const char *GuessSymbolName(uint64_t value, SymbolAddressMap *AddrMap) {
|
|||
return SymbolName;
|
||||
}
|
||||
|
||||
static void DumpCstringChar(const char c) {
|
||||
char p[2];
|
||||
p[0] = c;
|
||||
p[1] = '\0';
|
||||
outs().write_escaped(p);
|
||||
}
|
||||
|
||||
static void DumpCstringSection(MachOObjectFile *O, const char *sect,
|
||||
uint32_t sect_size, uint64_t sect_addr,
|
||||
bool print_addresses) {
|
||||
for (uint32_t i = 0; i < sect_size; i++) {
|
||||
if (print_addresses) {
|
||||
if (O->is64Bit())
|
||||
outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%016" PRIx64, sect_addr + i) << " ";
|
||||
else
|
||||
outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
for (; i < sect_size && sect[i] != '\0'; i++) {
|
||||
char p[2];
|
||||
p[0] = sect[i];
|
||||
p[1] = '\0';
|
||||
outs().write_escaped(p);
|
||||
outs() << format("%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
for (; i < sect_size && sect[i] != '\0'; i++)
|
||||
DumpCstringChar(sect[i]);
|
||||
if (i < sect_size && sect[i] == '\0')
|
||||
outs() << "\n";
|
||||
}
|
||||
|
|
@ -580,9 +583,9 @@ static void DumpLiteral4Section(MachOObjectFile *O, const char *sect,
|
|||
for (uint32_t i = 0; i < sect_size; i += sizeof(float)) {
|
||||
if (print_addresses) {
|
||||
if (O->is64Bit())
|
||||
outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%016" PRIx64, sect_addr + i) << " ";
|
||||
else
|
||||
outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
float f;
|
||||
memcpy(&f, sect + i, sizeof(float));
|
||||
|
|
@ -628,9 +631,9 @@ static void DumpLiteral8Section(MachOObjectFile *O, const char *sect,
|
|||
for (uint32_t i = 0; i < sect_size; i += sizeof(double)) {
|
||||
if (print_addresses) {
|
||||
if (O->is64Bit())
|
||||
outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%016" PRIx64, sect_addr + i) << " ";
|
||||
else
|
||||
outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
double d;
|
||||
memcpy(&d, sect + i, sizeof(double));
|
||||
|
|
@ -647,15 +650,22 @@ static void DumpLiteral8Section(MachOObjectFile *O, const char *sect,
|
|||
}
|
||||
}
|
||||
|
||||
static void DumpLiteral16(uint32_t l0, uint32_t l1, uint32_t l2, uint32_t l3) {
|
||||
outs() << format("0x%08" PRIx32, l0) << " ";
|
||||
outs() << format("0x%08" PRIx32, l1) << " ";
|
||||
outs() << format("0x%08" PRIx32, l2) << " ";
|
||||
outs() << format("0x%08" PRIx32, l3) << "\n";
|
||||
}
|
||||
|
||||
static void DumpLiteral16Section(MachOObjectFile *O, const char *sect,
|
||||
uint32_t sect_size, uint64_t sect_addr,
|
||||
bool print_addresses) {
|
||||
for (uint32_t i = 0; i < sect_size; i += 16) {
|
||||
if (print_addresses) {
|
||||
if (O->is64Bit())
|
||||
outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%016" PRIx64, sect_addr + i) << " ";
|
||||
else
|
||||
outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
|
||||
outs() << format("%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
uint32_t l0, l1, l2, l3;
|
||||
memcpy(&l0, sect + i, sizeof(uint32_t));
|
||||
|
|
@ -668,10 +678,174 @@ static void DumpLiteral16Section(MachOObjectFile *O, const char *sect,
|
|||
sys::swapByteOrder(l2);
|
||||
sys::swapByteOrder(l3);
|
||||
}
|
||||
outs() << format("0x%08" PRIx32, l0) << " ";
|
||||
outs() << format("0x%08" PRIx32, l1) << " ";
|
||||
outs() << format("0x%08" PRIx32, l2) << " ";
|
||||
outs() << format("0x%08" PRIx32, l3) << "\n";
|
||||
DumpLiteral16(l0, l1, l2, l3);
|
||||
}
|
||||
}
|
||||
|
||||
static void DumpLiteralPointerSection(MachOObjectFile *O,
|
||||
const SectionRef &Section,
|
||||
const char *sect, uint32_t sect_size,
|
||||
uint64_t sect_addr,
|
||||
bool print_addresses) {
|
||||
// Collect the literal sections in this Mach-O file.
|
||||
std::vector<SectionRef> LiteralSections;
|
||||
for (const SectionRef &Section : O->sections()) {
|
||||
DataRefImpl Ref = Section.getRawDataRefImpl();
|
||||
uint32_t section_type;
|
||||
if (O->is64Bit()) {
|
||||
const MachO::section_64 Sec = O->getSection64(Ref);
|
||||
section_type = Sec.flags & MachO::SECTION_TYPE;
|
||||
} else {
|
||||
const MachO::section Sec = O->getSection(Ref);
|
||||
section_type = Sec.flags & MachO::SECTION_TYPE;
|
||||
}
|
||||
if (section_type == MachO::S_CSTRING_LITERALS ||
|
||||
section_type == MachO::S_4BYTE_LITERALS ||
|
||||
section_type == MachO::S_8BYTE_LITERALS ||
|
||||
section_type == MachO::S_16BYTE_LITERALS)
|
||||
LiteralSections.push_back(Section);
|
||||
}
|
||||
|
||||
// Set the size of the literal pointer.
|
||||
uint32_t lp_size = O->is64Bit() ? 8 : 4;
|
||||
|
||||
// Collect the external relocation symbols for the the literal pointers.
|
||||
std::vector<std::pair<uint64_t, SymbolRef>> Relocs;
|
||||
for (const RelocationRef &Reloc : Section.relocations()) {
|
||||
DataRefImpl Rel;
|
||||
MachO::any_relocation_info RE;
|
||||
bool isExtern = false;
|
||||
Rel = Reloc.getRawDataRefImpl();
|
||||
RE = O->getRelocation(Rel);
|
||||
isExtern = O->getPlainRelocationExternal(RE);
|
||||
if (isExtern) {
|
||||
uint64_t RelocOffset;
|
||||
Reloc.getOffset(RelocOffset);
|
||||
symbol_iterator RelocSym = Reloc.getSymbol();
|
||||
Relocs.push_back(std::make_pair(RelocOffset, *RelocSym));
|
||||
}
|
||||
}
|
||||
array_pod_sort(Relocs.begin(), Relocs.end());
|
||||
|
||||
// Dump each literal pointer.
|
||||
for (uint32_t i = 0; i < sect_size; i += lp_size) {
|
||||
if (print_addresses) {
|
||||
if (O->is64Bit())
|
||||
outs() << format("%016" PRIx64, sect_addr + i) << " ";
|
||||
else
|
||||
outs() << format("%08" PRIx64, sect_addr + i) << " ";
|
||||
}
|
||||
uint64_t lp;
|
||||
if (O->is64Bit()) {
|
||||
memcpy(&lp, sect + i, sizeof(uint64_t));
|
||||
if (O->isLittleEndian() != sys::IsLittleEndianHost)
|
||||
sys::swapByteOrder(lp);
|
||||
} else {
|
||||
uint32_t li;
|
||||
memcpy(&li, sect + i, sizeof(uint32_t));
|
||||
if (O->isLittleEndian() != sys::IsLittleEndianHost)
|
||||
sys::swapByteOrder(li);
|
||||
lp = li;
|
||||
}
|
||||
|
||||
// First look for an external relocation entry for this literal pointer.
|
||||
bool reloc_found = false;
|
||||
for (unsigned j = 0, e = Relocs.size(); j != e; ++j) {
|
||||
if (Relocs[i].first == i) {
|
||||
symbol_iterator RelocSym = Relocs[j].second;
|
||||
StringRef SymName;
|
||||
RelocSym->getName(SymName);
|
||||
outs() << "external relocation entry for symbol:" << SymName << "\n";
|
||||
reloc_found = true;
|
||||
}
|
||||
}
|
||||
if (reloc_found == true)
|
||||
continue;
|
||||
|
||||
// For local references see what the section the literal pointer points to.
|
||||
bool found = false;
|
||||
for (unsigned SectIdx = 0; SectIdx != LiteralSections.size(); SectIdx++) {
|
||||
uint64_t SectAddress = LiteralSections[SectIdx].getAddress();
|
||||
uint64_t SectSize = LiteralSections[SectIdx].getSize();
|
||||
if (lp >= SectAddress && lp < SectAddress + SectSize) {
|
||||
found = true;
|
||||
|
||||
StringRef SectName;
|
||||
LiteralSections[SectIdx].getName(SectName);
|
||||
DataRefImpl Ref = LiteralSections[SectIdx].getRawDataRefImpl();
|
||||
StringRef SegmentName = O->getSectionFinalSegmentName(Ref);
|
||||
outs() << SegmentName << ":" << SectName << ":";
|
||||
|
||||
uint32_t section_type;
|
||||
if (O->is64Bit()) {
|
||||
const MachO::section_64 Sec = O->getSection64(Ref);
|
||||
section_type = Sec.flags & MachO::SECTION_TYPE;
|
||||
} else {
|
||||
const MachO::section Sec = O->getSection(Ref);
|
||||
section_type = Sec.flags & MachO::SECTION_TYPE;
|
||||
}
|
||||
|
||||
StringRef BytesStr;
|
||||
LiteralSections[SectIdx].getContents(BytesStr);
|
||||
const char *Contents = reinterpret_cast<const char *>(BytesStr.data());
|
||||
|
||||
switch (section_type) {
|
||||
case MachO::S_CSTRING_LITERALS:
|
||||
for (uint64_t i = lp - SectAddress;
|
||||
i < SectSize && Contents[i] != '\0'; i++) {
|
||||
DumpCstringChar(Contents[i]);
|
||||
}
|
||||
outs() << "\n";
|
||||
break;
|
||||
case MachO::S_4BYTE_LITERALS:
|
||||
float f;
|
||||
memcpy(&f, Contents + (lp - SectAddress), sizeof(float));
|
||||
uint32_t l;
|
||||
memcpy(&l, Contents + (lp - SectAddress), sizeof(uint32_t));
|
||||
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
|
||||
sys::swapByteOrder(f);
|
||||
sys::swapByteOrder(l);
|
||||
}
|
||||
DumpLiteral4(l, f);
|
||||
break;
|
||||
case MachO::S_8BYTE_LITERALS: {
|
||||
double d;
|
||||
memcpy(&d, Contents + (lp - SectAddress), sizeof(double));
|
||||
uint32_t l0, l1;
|
||||
memcpy(&l0, Contents + (lp - SectAddress), sizeof(uint32_t));
|
||||
memcpy(&l1, Contents + (lp - SectAddress) + sizeof(uint32_t),
|
||||
sizeof(uint32_t));
|
||||
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
|
||||
sys::swapByteOrder(f);
|
||||
sys::swapByteOrder(l0);
|
||||
sys::swapByteOrder(l1);
|
||||
}
|
||||
DumpLiteral8(O, l0, l1, d);
|
||||
break;
|
||||
}
|
||||
case MachO::S_16BYTE_LITERALS: {
|
||||
uint32_t l0, l1, l2, l3;
|
||||
memcpy(&l0, Contents + (lp - SectAddress), sizeof(uint32_t));
|
||||
memcpy(&l1, Contents + (lp - SectAddress) + sizeof(uint32_t),
|
||||
sizeof(uint32_t));
|
||||
memcpy(&l2, Contents + (lp - SectAddress) + 2 * sizeof(uint32_t),
|
||||
sizeof(uint32_t));
|
||||
memcpy(&l3, Contents + (lp - SectAddress) + 3 * sizeof(uint32_t),
|
||||
sizeof(uint32_t));
|
||||
if (O->isLittleEndian() != sys::IsLittleEndianHost) {
|
||||
sys::swapByteOrder(l0);
|
||||
sys::swapByteOrder(l1);
|
||||
sys::swapByteOrder(l2);
|
||||
sys::swapByteOrder(l3);
|
||||
}
|
||||
DumpLiteral16(l0, l1, l2, l3);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (found == false)
|
||||
outs() << format("0x%" PRIx64, lp) << " (not in a literal section)\n";
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -826,6 +1000,10 @@ static void DumpSectionContents(StringRef Filename, MachOObjectFile *O,
|
|||
case MachO::S_16BYTE_LITERALS:
|
||||
DumpLiteral16Section(O, sect, sect_size, sect_addr, verbose);
|
||||
break;
|
||||
case MachO::S_LITERAL_POINTERS:
|
||||
DumpLiteralPointerSection(O, Section, sect, sect_size, sect_addr,
|
||||
verbose);
|
||||
break;
|
||||
case MachO::S_MOD_INIT_FUNC_POINTERS:
|
||||
case MachO::S_MOD_TERM_FUNC_POINTERS:
|
||||
DumpInitTermPointerSection(O, sect, sect_size, sect_addr, &AddrMap,
|
||||
|
|
|
|||
Loading…
Reference in New Issue