[llvm] r228465 - Add code to llvm-objdump so the -section option with -macho will dump literal
Kevin Enderby
enderby at apple.com
Fri Feb 6 15:25:38 PST 2015
Author: enderby
Date: Fri Feb 6 17:25:38 2015
New Revision: 228465
URL: http://llvm.org/viewvc/llvm-project?rev=228465&view=rev
Log:
Add code to llvm-objdump so the -section option with -macho will dump literal
sections with the Mach-O S_{4,8,16}BYTE_LITERALS section types.
Added:
llvm/trunk/test/tools/llvm-objdump/X86/macho-literals.test
Modified:
llvm/trunk/include/llvm/Support/SwapByteOrder.h
llvm/trunk/tools/llvm-objdump/MachODump.cpp
Modified: llvm/trunk/include/llvm/Support/SwapByteOrder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/SwapByteOrder.h?rev=228465&r1=228464&r2=228465&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/SwapByteOrder.h (original)
+++ llvm/trunk/include/llvm/Support/SwapByteOrder.h Fri Feb 6 17:25:38 2015
@@ -94,6 +94,26 @@ inline signed long long getSwappedBytes(
return SwapByteOrder_64(C);
}
+inline float getSwappedBytes(float C) {
+ union {
+ uint32_t i;
+ float f;
+ } in, out;
+ in.f = C;
+ out.i = SwapByteOrder_32(in.i);
+ return out.f;
+}
+
+inline float getSwappedBytes(double C) {
+ union {
+ uint64_t i;
+ double d;
+ } in, out;
+ in.d = C;
+ out.i = SwapByteOrder_64(in.i);
+ return out.d;
+}
+
template<typename T>
inline void swapByteOrder(T &Value) {
Value = getSwappedBytes(Value);
Added: llvm/trunk/test/tools/llvm-objdump/X86/macho-literals.test
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/tools/llvm-objdump/X86/macho-literals.test?rev=228465&view=auto
==============================================================================
--- llvm/trunk/test/tools/llvm-objdump/X86/macho-literals.test (added)
+++ llvm/trunk/test/tools/llvm-objdump/X86/macho-literals.test Fri Feb 6 17:25:38 2015
@@ -0,0 +1,48 @@
+# RUN: llvm-mc < %s -triple x86_64-apple-darwin -filetype=obj | llvm-objdump -m -section __TEXT,__literal4 - | FileCheck %s -check-prefix=CHECK-LIT4
+# RUN: llvm-mc < %s -triple x86_64-apple-darwin -filetype=obj | llvm-objdump -m -section __TEXT,__literal8 - | FileCheck %s -check-prefix=CHECK-LIT8
+# RUN: llvm-mc < %s -triple x86_64-apple-darwin -filetype=obj | llvm-objdump -m -section __TEXT,__literal16 - | FileCheck %s -check-prefix=CHECK-LIT16
+
+.literal4
+.float 2.5
+.float 8.25
+.long 0x7f800000
+.long 0xff800000
+.long 0x7fc00000
+.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
+
+.literal8
+.double 2.5
+.double 8.25
+.long 0
+.long 0x7ff00000
+.long 0
+.long 0xfff00000
+.long 0
+.long 0x7ff80000
+.long 1
+.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
+
+.literal16
+.long 1
+.long 2
+.long 3
+.long 4
+
+# CHECK-LIT16: Contents of (__TEXT,__literal16) section
+# CHECK-LIT16: 0x0000000000000050 0x00000001 0x00000002 0x00000003 0x00000004
Modified: llvm/trunk/tools/llvm-objdump/MachODump.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-objdump/MachODump.cpp?rev=228465&r1=228464&r2=228465&view=diff
==============================================================================
--- llvm/trunk/tools/llvm-objdump/MachODump.cpp (original)
+++ llvm/trunk/tools/llvm-objdump/MachODump.cpp Fri Feb 6 17:25:38 2015
@@ -539,13 +539,15 @@ static const char *GuessSymbolName(uint6
static void DumpCstringSection(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
- bool verbose) {
+ bool print_addresses) {
for (uint32_t i = 0; i < sect_size; i++) {
- if (O->is64Bit())
- outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
- else
- outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
- for ( ; i < sect_size && sect[i] != '\0'; i++) {
+ if (print_addresses) {
+ if (O->is64Bit())
+ outs() << format("0x%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';
@@ -556,6 +558,123 @@ static void DumpCstringSection(MachOObje
}
}
+static void DumpLiteral4(uint32_t l, float f) {
+ outs() << format("0x%08" PRIx32, l);
+ if ((l & 0x7f800000) != 0x7f800000)
+ outs() << format(" (%.16e)\n", f);
+ else {
+ if (l == 0x7f800000)
+ outs() << " (+Infinity)\n";
+ else if (l == 0xff800000)
+ outs() << " (-Infinity)\n";
+ else if ((l & 0x00400000) == 0x00400000)
+ outs() << " (non-signaling Not-a-Number)\n";
+ else
+ outs() << " (signaling Not-a-Number)\n";
+ }
+}
+
+static void DumpLiteral4Section(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 += sizeof(float)) {
+ if (print_addresses) {
+ if (O->is64Bit())
+ outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
+ else
+ outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
+ }
+ float f;
+ memcpy(&f, sect + i, sizeof(float));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost)
+ sys::swapByteOrder(f);
+ uint32_t l;
+ memcpy(&l, sect + i, sizeof(uint32_t));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost)
+ sys::swapByteOrder(l);
+ DumpLiteral4(l, f);
+ }
+}
+
+static void DumpLiteral8(MachOObjectFile *O, uint32_t l0, uint32_t l1,
+ double d) {
+ outs() << format("0x%08" PRIx32, l0) << " " << format("0x%08" PRIx32, l1);
+ uint32_t Hi, Lo;
+ if (O->isLittleEndian()) {
+ Hi = l1;
+ Lo = l0;
+ } else {
+ Hi = l0;
+ Lo = l1;
+ }
+ // Hi is the high word, so this is equivalent to if(isfinite(d))
+ if ((Hi & 0x7ff00000) != 0x7ff00000)
+ outs() << format(" (%.16e)\n", d);
+ else {
+ if (Hi == 0x7ff00000 && Lo == 0)
+ outs() << " (+Infinity)\n";
+ else if (Hi == 0xfff00000 && Lo == 0)
+ outs() << " (-Infinity)\n";
+ else if ((Hi & 0x00080000) == 0x00080000)
+ outs() << " (non-signaling Not-a-Number)\n";
+ else
+ outs() << " (signaling Not-a-Number)\n";
+ }
+}
+
+static void DumpLiteral8Section(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 += sizeof(double)) {
+ if (print_addresses) {
+ if (O->is64Bit())
+ outs() << format("0x%016" PRIx64, sect_addr + i) << " ";
+ else
+ outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
+ }
+ double d;
+ memcpy(&d, sect + i, sizeof(double));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost)
+ sys::swapByteOrder(d);
+ uint32_t l0, l1;
+ memcpy(&l0, sect + i, sizeof(uint32_t));
+ memcpy(&l1, sect + i + sizeof(uint32_t), sizeof(uint32_t));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost) {
+ sys::swapByteOrder(l0);
+ sys::swapByteOrder(l1);
+ }
+ DumpLiteral8(O, l0, l1, d);
+ }
+}
+
+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) << " ";
+ else
+ outs() << format("0x%08" PRIx64, sect_addr + i) << " ";
+ }
+ uint32_t l0, l1, l2, l3;
+ memcpy(&l0, sect + i, sizeof(uint32_t));
+ memcpy(&l1, sect + i + sizeof(uint32_t), sizeof(uint32_t));
+ memcpy(&l2, sect + i + 2 * sizeof(uint32_t), sizeof(uint32_t));
+ memcpy(&l3, sect + i + 3 * sizeof(uint32_t), sizeof(uint32_t));
+ if (O->isLittleEndian() != sys::IsLittleEndianHost) {
+ sys::swapByteOrder(l0);
+ sys::swapByteOrder(l1);
+ 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";
+ }
+}
+
static void DumpInitTermPointerSection(MachOObjectFile *O, const char *sect,
uint32_t sect_size, uint64_t sect_addr,
SymbolAddressMap *AddrMap,
@@ -698,6 +817,15 @@ static void DumpSectionContents(StringRe
case MachO::S_CSTRING_LITERALS:
DumpCstringSection(O, sect, sect_size, sect_addr, verbose);
break;
+ case MachO::S_4BYTE_LITERALS:
+ DumpLiteral4Section(O, sect, sect_size, sect_addr, verbose);
+ break;
+ case MachO::S_8BYTE_LITERALS:
+ DumpLiteral8Section(O, sect, sect_size, sect_addr, verbose);
+ break;
+ case MachO::S_16BYTE_LITERALS:
+ DumpLiteral16Section(O, 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,
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