Remove bootstrapping code from ELFLoader.

This runs inside the kernel now, and I no longer need the emulated version.

ELFLoader/ELFImage.cpp

@@ -1,19 +1,11 @@
 #include "ELFImage.h"
 #include <AK/kstdio.h>
 
-#ifdef SERENITY
 ELFImage::ELFImage(ByteBuffer&& buffer)
     : m_buffer(buffer)
 {
     m_isValid = parse();
 }
-#else
-ELFImage::ELFImage(MappedFile&& file)
-    : m_file(move(file))
-{
-    m_isValid = parse();
-}
-#endif
 
 ELFImage::~ELFImage()
 {

ELFLoader/ELFImage.h

@@ -1,9 +1,5 @@
 #pragma once
 
-#ifndef SERENITY
-#include <AK/MappedFile.h>
-#endif
-
 #include <AK/OwnPtr.h>
 #include <AK/HashMap.h>
 #include <AK/String.h>
@@ -12,11 +8,7 @@
 
 class ELFImage {
 public:
-#ifdef SERENITY
     explicit ELFImage(ByteBuffer&&);
-#else
-    explicit ELFImage(MappedFile&&);
-#endif
     ~ELFImage();
     void dump();
     bool isValid() const { return m_isValid; }

ELFLoader/ELFLoader.cpp

@@ -3,14 +3,10 @@
 
 //#define ELFLOADER_DEBUG
 
-#ifdef SERENITY
-ELFLoader::ELFLoader(ExecSpace& execSpace, ByteBuffer&& file)
-#else
-ELFLoader::ELFLoader(ExecSpace& execSpace, MappedFile&& file)
-#endif
+ELFLoader::ELFLoader(ExecSpace& execSpace, ByteBuffer&& buffer)
     : m_execSpace(execSpace)
 {
-    m_image = make<ELFImage>(move(file));
+    m_image = make<ELFImage>(move(buffer));
 }
 
 ELFLoader::~ELFLoader()
@@ -58,9 +54,10 @@ bool ELFLoader::layout()
             return true;
         char* ptr = (char*)section.address();
         if (!ptr) {
-            kprintf("ELFLoader: failed to allocate section '%s'\n", section.name());
-            failed = true;
-            return false;
+#ifdef ELFLOADER_DEBUG
+            kprintf("ELFLoader: ignoring section '%s' with null address\n", section.name());
+#endif
+            return true;
         }
         memcpy(ptr, section.rawData(), section.size());
         m_sections.set(section.name(), move(ptr));

ELFLoader/ELFLoader.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <AK/HashMap.h>
-#include <AK/MappedFile.h>
 #include <AK/OwnPtr.h>
 #include <AK/Vector.h>
 #include "ExecSpace.h"
@@ -9,11 +8,7 @@
 
 class ELFLoader {
 public:
-#ifdef SERENITY
     ELFLoader(ExecSpace&, ByteBuffer&&);
-#else
-    ELFLoader(ExecSpace&, MappedFile&&);
-#endif
     ~ELFLoader();
 
     bool load();

ELFLoader/ExecSpace.cpp

@@ -2,41 +2,17 @@
 #include "ELFLoader.h"
 #include <AK/Types.h>
 
-#ifndef SERENITY
-#include <AK/TemporaryFile.h>
-#endif
-
 //#define EXECSPACE_DEBUG
 
 ExecSpace::ExecSpace()
 {
-    initializeBuiltins();
 }
 
 ExecSpace::~ExecSpace()
 {
 }
 
-#ifdef SERENITY
-int puts(const char* str)
-{
-    kprintf("%s\n", str);
-    return 0;
-}
-#endif
-
-void ExecSpace::initializeBuiltins()
-{
-#ifndef SERENITY
-    m_symbols.set("puts", { (char*)puts, 0 });
-#endif
-}
-
-#ifdef SERENITY
 bool ExecSpace::loadELF(ByteBuffer&& file)
-#else
-bool ExecSpace::loadELF(MappedFile&& file)
-#endif
 {
     ELFLoader loader(*this, move(file));
     if (!loader.load())
@@ -53,37 +29,6 @@ bool ExecSpace::loadELF(MappedFile&& file)
     return true;
 }
 
-#ifdef EXECSPACE_DEBUG
-static void disassemble(const char* data, size_t length)
-{
-    if (!length)
-        return;
-
-#ifdef SERENITY
-    for (unsigned i = 0; i < length; ++i) {
-        kprintf("%b ", (unsigned char)data[i]);
-    }
-    kprintf("\n");
-#else
-    TemporaryFile temp;
-    if (!temp.isValid()) {
-        fprintf(stderr, "Unable to create temp file for disassembly.\n");
-        return;
-    }
-    fprintf(temp.stream(), "db ");
-    for (unsigned i = 0; i < length; ++i) {
-        fprintf(temp.stream(), "0x%02x, ", (unsigned char)data[i]);
-    }
-    fprintf(temp.stream(), "\n");
-    temp.sync();
-
-    char cmdbuf[128];
-    ksprintf(cmdbuf, "nasm -f bin -o /dev/stdout %s | ndisasm -b32 -", temp.fileName().characters());
-    system(cmdbuf);
-#endif
-}
-#endif
-
 char* ExecSpace::symbolPtr(const char* name)
 {
     if (auto it = m_symbols.find(name); it != m_symbols.end()) {
@@ -97,15 +42,6 @@ char* ExecSpace::symbolPtr(const char* name)
     return nullptr;
 }
 
-void ExecSpace::allocateUniverse(size_t size)
-{
-    ASSERT(!m_universe);
-    if (hookableAlloc)
-        m_universe = static_cast<char*>(hookableAlloc("elf-sec", size));
-    else
-        m_universe = static_cast<char*>(kmalloc(size));
-}
-
 bool ExecSpace::allocate_section(LinearAddress laddr, size_t size, size_t alignment, bool is_readable, bool is_writable)
 {
     ASSERT(alloc_section_hook);

ELFLoader/ExecSpace.h

@@ -2,9 +2,9 @@
 
 #include <AK/Function.h>
 #include <AK/HashMap.h>
-#include <AK/MappedFile.h>
 #include <AK/OwnPtr.h>
 #include <AK/Vector.h>
+#include <AK/String.h>
 #include "types.h"
 
 class ELFLoader;
@@ -26,28 +26,18 @@ public:
     ExecSpace();
     ~ExecSpace();
 
-    Function<void*(const String&, size_t)> hookableAlloc;
     Function<void*(LinearAddress, size_t, size_t, bool, bool, const String&)> alloc_section_hook;
 
-#ifdef SERENITY
     bool loadELF(ByteBuffer&&);
-#else
-    bool loadELF(MappedFile&&);
-#endif
 
     char* symbolPtr(const char* name);
 
     void addSymbol(String&& name, char* ptr, unsigned size);
 
-    void allocateUniverse(size_t);
-
     bool allocate_section(LinearAddress, size_t, size_t alignment, bool is_readable, bool is_writable);
 
 private:
-    void initializeBuiltins();
-
     Vector<char*> m_allocated_regions;
     HashMap<String, PtrAndSize> m_symbols;
-    char* m_universe { nullptr };
 };
 

ELFLoader/Makefile

@@ -1,38 +0,0 @@
-PROGRAM = run
-
-AK_OBJS = \
-    ../AK/String.o \
-    ../AK/StringImpl.o \
-    ../AK/MappedFile.o \
-    ../AK/TemporaryFile.o \
-    ../AK/kmalloc.o
-
-CSILLA_OBJS = \
-    ExecSpace.o \
-    ELFImage.o \
-    ELFLoader.o \
-    test.o
-
-TEST_OBJ = \
-    _test.o
-
-TEST_OBJ_CXXFLAGS = -Os -fno-exceptions -fno-rtti -fno-asynchronous-unwind-tables
-
-OBJS = $(AK_OBJS) $(CSILLA_OBJS)
-
-CXXFLAGS = -std=c++17 -Os -W -Wall -I. -I.. -ggdb3
-
-all:	$(PROGRAM) $(TEST_OBJ)
-
-_test.o: _test.cpp
-	$(CXX) $(TEST_OBJ_CXXFLAGS) -c $<
-
-.cpp.o:
-	$(CXX) $(CXXFLAGS) -o $@ -c $<
-
-clean:
-	rm -f $(OBJS) $(TEST_OBJ) $(PROGRAM)
-
-$(PROGRAM): $(OBJS)
-	$(CXX) $(LDFLAGS) -o $@ $(OBJS)
-

ELFLoader/_test.cpp

@@ -1,29 +0,0 @@
-#include <stdio.h>
-
-extern "C" const char hello_string[] = "Hello World!";
-
-extern "C" int foo()
-{
-    volatile int i = 3;
-    i = 4;
-    return i;
-}
-
-extern "C" int bar()
-{
-    return foo();
-}
-
-extern "C" int baz()
-{
-    return bar();
-}
-
-extern "C" int EntryPoint()
-{
-    puts(hello_string);
-    printf("abc!\n");
-    printf("def!\n");
-    return 10 + baz();
-}
-

ELFLoader/test.cpp

@@ -1,24 +0,0 @@
-#include "ExecSpace.h"
-#include <cstdio>
-
-typedef int (*MainFunctionPtr)(void);
-
-int main(int, char**)
-{
-    MappedFile f("_test.o");
-    if (!f.isValid()) {
-        fprintf(stderr, "Failed to map file :(\n");
-        return 1;
-    }
-
-    ExecSpace space;
-    space.loadELF(std::move(f));
-
-    auto func = reinterpret_cast<MainFunctionPtr>(space.symbolPtr("EntryPoint"));
-    printf("func: %p\n", func);
-
-    int z = func();
-    printf("func() returned %d\n", z);
-
-    return 0;
-}