Write out elf image for debugging.

This commit is contained in:
Christian Speckner 2024-07-23 22:28:34 +02:00
parent a3cd0625c5
commit 33a83c42a4
3 changed files with 41 additions and 0 deletions

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@ -17,6 +17,10 @@
#include <sstream> #include <sstream>
#ifdef DUMP_ELF
#include <ofstream>
#endif
#include "System.hxx" #include "System.hxx"
#include "ElfParser.hxx" #include "ElfParser.hxx"
#include "ElfLinker.hxx" #include "ElfLinker.hxx"
@ -141,6 +145,31 @@ namespace {
cout << std::dec; cout << std::dec;
} }
void writeDebugBinary(const ElfLinker& linker)
{
constexpr size_t IMAGE_SIZE = 4 * 0x00100000;
static const char* IMAGE_FILE_NAME = "elf_executable_image.bin";
auto binary = make_unique<uInt8[]>(IMAGE_SIZE);
std::memset(binary.get(), 0, IMAGE_SIZE);
for (auto segment: {ElfLinker::SegmentType::text, ElfLinker::SegmentType::data, ElfLinker::SegmentType::rodata})
std::memcpy(
binary.get() + linker.getSegmentBase(segment),
linker.getSegmentData(segment),
linker.getSegmentSize(segment)
);
{
std::ofstream binaryFile;
binaryFile.open(IMAGE_FILE_NAME);
binaryFile.write(reinterpret_cast<const char*>(binary.get()), 4 * 0x00100000);
}
cout << "wrote executable image to " << IMAGE_FILE_NAME << std::endl;
}
#endif #endif
} // namespace } // namespace
@ -182,6 +211,10 @@ CartridgeELF::CartridgeELF(const ByteBuffer& image, size_t size, string_view md5
throw runtime_error("failed to resolve ARM entrypoint" + string(e.what())); throw runtime_error("failed to resolve ARM entrypoint" + string(e.what()));
} }
for (auto segment: {ElfLinker::SegmentType::text, ElfLinker::SegmentType::data, ElfLinker::SegmentType::rodata})
if (elfLinker.getSegmentSize(segment) > 0x00100000)
throw runtime_error("segment size exceeds limit");
#ifdef DUMP_ELF #ifdef DUMP_ELF
dumpLinkage(elfParser, elfLinker); dumpLinkage(elfParser, elfLinker);
@ -189,6 +222,8 @@ CartridgeELF::CartridgeELF(const ByteBuffer& image, size_t size, string_view md5
<< "\nARM entrypoint: 0x" << "\nARM entrypoint: 0x"
<< std::hex << std::setw(8) << std::setfill('0') << myArmEntrypoint << std::dec << std::hex << std::setw(8) << std::setfill('0') << myArmEntrypoint << std::dec
<< '\n'; << '\n';
writeDebugBinary(elfLinker);
#endif #endif
} }

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@ -476,6 +476,11 @@ CortexM0& CortexM0::setRegister(uInt8 regno, uInt32 value)
return *this; return *this;
} }
uInt32 CortexM0::getRegister(uInt32 regno)
{
return read_register(regno);
}
uInt8 CortexM0::decodeInstructionWord(uInt16 instructionWord) uInt8 CortexM0::decodeInstructionWord(uInt16 instructionWord)
{ {
return static_cast<uInt8>(::decodeInstructionWord(instructionWord)); return static_cast<uInt8>(::decodeInstructionWord(instructionWord));

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@ -93,6 +93,7 @@ class CortexM0
CortexM0& reset(); CortexM0& reset();
CortexM0& setRegister(uInt8 regno, uInt32 value); CortexM0& setRegister(uInt8 regno, uInt32 value);
uInt32 getRegister(uInt32 regno);
static uInt8 decodeInstructionWord(uInt16 instructionWord); static uInt8 decodeInstructionWord(uInt16 instructionWord);