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Move ELFLoader debug output behind flags.

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The logging spam was out of control.
This commit is contained in:
Andreas Kling 2018-10-23 11:03:26 +02:00
parent fe237ee215
commit 56ed448424
Notes: sideshowbarker 2024-07-19 18:44:55 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/56ed448424b
3 changed files with 29 additions and 1 deletions
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4
ELFLoader/ELFImage.cpp
View file

@ -180,12 +180,16 @@ const ELFImage::RelocationSection ELFImage::Section::relocations() const
char relocationSectionName[128];
int x = ksprintf(relocationSectionName, ".rel%s", name());
#ifdef ELFIMAGE_DEBUG
kprintf("looking for '%s'\n", relocationSectionName);
#endif
auto relocationSection = m_image.lookupSection(relocationSectionName);
if (relocationSection.type() != SHT_REL)
return static_cast<const RelocationSection>(m_image.section(0));
#ifdef ELFIMAGE_DEBUG
kprintf("Found relocations for %s in %s\n", name(), relocationSection.name());
#endif
return static_cast<const RelocationSection>(relocationSection);
}

16
ELFLoader/ELFLoader.cpp
View file

@ -1,6 +1,8 @@
#include "ELFLoader.h"
#include <AK/kstdio.h>
//#define ELFLOADER_DEBUG
#ifdef SERENITY
ELFLoader::ELFLoader(ExecSpace& execSpace, ByteBuffer&& file)
#else
@ -17,7 +19,9 @@ ELFLoader::~ELFLoader()
bool ELFLoader::load()
{
#ifdef ELFLOADER_DEBUG
m_image->dump();
#endif
if (!m_image->isValid())
return false;
@ -30,9 +34,13 @@ bool ELFLoader::load()
void ELFLoader::layout()
{
#ifdef ELFLOADER_DEBUG
kprintf("[ELFLoader] Layout\n");
#endif
m_image->forEachSectionOfType(SHT_PROGBITS, [this] (const ELFImage::Section& section) {
#ifdef ELFLOADER_DEBUG
kprintf("[ELFLoader] Allocating progbits section: %s\n", section.name());
#endif
char* ptr = m_execSpace.allocateArea(section.name(), section.size());
memcpy(ptr, section.rawData(), section.size());
m_sections.set(section.name(), move(ptr));
@ -61,7 +69,9 @@ char* ELFLoader::areaForSectionName(const char* name)
void ELFLoader::performRelocations()
{
#ifdef ELFLOADER_DEBUG
kprintf("[ELFLoader] Performing relocations\n");
#endif
m_image->forEachSectionOfType(SHT_PROGBITS, [this] (const ELFImage::Section& section) {
auto& relocations = section.relocations();
@ -75,6 +85,7 @@ void ELFLoader::performRelocations()
case R_386_PC32: {
char* targetPtr = (char*)lookup(symbol);
ptrdiff_t relativeOffset = (char*)targetPtr - ((char*)&patchPtr + 4);
#ifdef ELFLOADER_DEBUG
kprintf("[ELFLoader] Relocate PC32: offset=%x, symbol=%u(%s) value=%x target=%p, offset=%d\n",
relocation.offset(),
symbol.index(),
@ -83,16 +94,19 @@ void ELFLoader::performRelocations()
targetPtr,
relativeOffset
);
#endif
patchPtr = relativeOffset;
break;
}
case R_386_32: {
#ifdef ELFLOADER_DEBUG
kprintf("[ELFLoader] Relocate Abs32: symbol=%u(%s), value=%x, section=%s\n",
symbol.index(),
symbol.name(),
symbol.value(),
symbol.section().name()
);
#endif
char* targetPtr = areaForSection(symbol.section()) + symbol.value();
patchPtr += (ptrdiff_t)targetPtr;
break;
@ -108,7 +122,9 @@ void ELFLoader::performRelocations()
void ELFLoader::exportSymbols()
{
m_image->forEachSymbol([&] (const ELFImage::Symbol symbol) {
#ifdef ELFLOADER_DEBUG
kprintf("symbol: %u, type=%u, name=%s, section=%u\n", symbol.index(), symbol.type(), symbol.name(), symbol.sectionIndex());
#endif
if (symbol.type() == STT_FUNC)
m_execSpace.addSymbol(symbol.name(), areaForSection(symbol.section()) + symbol.value(), symbol.size());
// FIXME: What about other symbol types?

10
ELFLoader/ExecSpace.cpp
View file

@ -3,6 +3,8 @@
#include <AK/TemporaryFile.h>
#include <AK/Types.h>
//#define EXECSPACE_DEBUG
ExecSpace::ExecSpace()
{
initializeBuiltins();
@ -36,6 +38,7 @@ bool ExecSpace::loadELF(MappedFile&& file)
ELFLoader loader(*this, move(file));
if (!loader.load())
return false;
#ifdef EXECSPACE_DEBUG
kprintf("[ExecSpace] ELF loaded, symbol map now:\n");
for (auto& s : m_symbols) {
kprintf("> %p: %s (%u)\n",
@ -43,9 +46,11 @@ bool ExecSpace::loadELF(MappedFile&& file)
s.key.characters(),
s.value.size);
}
#endif
return true;
}
#ifdef EXECSPACE_DEBUG
static void disassemble(const char* data, size_t length)
{
if (!length)
@ -74,13 +79,16 @@ static void disassemble(const char* data, size_t length)
system(cmdbuf);
#endif
}
#endif
char* ExecSpace::symbolPtr(const char* name)
{
if (auto it = m_symbols.find(name); it != m_symbols.end()) {
kprintf("[ELFLoader] symbolPtr(%s) dump:\n", name);
auto& symbol = (*it).value;
#ifdef EXECSPACE_DEBUG
kprintf("[ELFLoader] symbolPtr(%s) dump:\n", name);
disassemble(symbol.ptr, symbol.size);
#endif
return symbol.ptr;
}
return nullptr;