// convert an elf file to a dol file
//
// args: dol file object
// elf filename
// returns: true if successful
bool convertElfFileToDol(DolFile& dolFile, const char *elfFilename)
{
// open elf input file
ElfFile elfFile;
if(!elfFile.open(elfFilename))
return false;
if(!elfFile.isPpc())
printf("Elf file doesnt seem to be for PPC!\n");
// create a temp file to store section data during copy
FILE* temp_fd = fopen("~temp.tmp", "w+b");
if(temp_fd == 0)
{
elfFile.close();
return false;
}
// check which sections to add to dol file
for(u32 i=0; i<elfFile.getNumSections(); i++)
{
// check if section type is 'PROGBITS'
// these are the sections required for the dol file
if(elfFile.getSectionType(i) == SHT_PROGBITS)
{
// get section data from elf file
fseek(temp_fd, 0, SEEK_SET);
elfFile.extractSectionData(i, temp_fd);
fseek(temp_fd, 0, SEEK_SET);
// sections with 'EXEC' flags are program code, and so
// should be added as a TEXT section in the dol file
if(elfFile.getSectionFlags(i) & SHF_EXECINSTR)
{
// add section data to dol file
dolFile.addTextSection(temp_fd, elfFile.getSectionAddress(i), elfFile.getSectionSize(i));
}
else
{
// add section data to dol file
if (elfFile.getSectionAddress(i) != 0 && elfFile.getSectionSize(i) != 0)
dolFile.addDataSection(temp_fd, elfFile.getSectionAddress(i), elfFile.getSectionSize(i));
}
}
else
{
// check for bss section by checking section name for '.bss'
char *name = 0;
if(elfFile.getSectionName(i, name) != ERROR_RETURN)
{
if(strcasecmp(name, ".bss") == 0)
{
dolFile.setBssAddress(elfFile.getSectionAddress(i));
dolFile.setBssSize(elfFile.getSectionSize(i));
}
delete[] name;
}
}
}
// set dol files entry point
dolFile.setEntryPoint(elfFile.getEntryPoint());
// finish up
fclose(temp_fd);
remove("~temp.tmp");
elfFile.close();
printf( "\nConverted %s to %s\n", elfFilename, dolFile.getFilename());
return true;
}
// dump dol file to an elf file
//
// args: dol file object
// returns: true if successful
bool dumpDolToElfFile(const DolFile& dolFile)
{
// work out filename to use for elf file
char elfFilename[256];
strcpy(elfFilename, dolFile.getFilename());
ChangeFileExtension(elfFilename, "elf");
// create elf output file
ElfFile elfFile;
if(!elfFile.create(elfFilename, ELFDATA2MSB))
return false;
// set elf file as PPC
elfFile.setMachineType(EM_PPC);
// set entry point in elf file
elfFile.setEntryPoint(dolFile.getEntryPoint());
// create a temp file to store section data during copy
FILE* temp_fd = fopen("~temp.tmp", "w+b");
if(temp_fd == 0)
{
elfFile.close();
return false;
}
char name[32];
// add dol text sections to elf file
for(u32 i=0; i<dolFile.getNumTextSections(); i++)
{
// get section data from dol file
fseek(temp_fd, 0, SEEK_SET);
dolFile.extractTextSection(i, temp_fd);
sprintf(name, ".text%d", i);
// add section data to elf file
fseek(temp_fd, 0, SEEK_SET);
elfFile.addSection(temp_fd, dolFile.getTextAddress(i), dolFile.getTextSize(i),
name, SHT_PROGBITS, SHF_ALLOC|SHF_EXECINSTR, 32);
// add a program header for the section just added
// the section just added, was added as the last section
// u32 offset = elfFile.getSectionOffset(elfFile.getNumSections() - 1);
// elfFile.addProgramHeader(dolFile.getTextAddress(i), dolFile.getTextSize(i), offset, PT_LOAD, PF_EXEC|PF_READ, 32);
}
// add dol data sections to elf file
for(u32 i=0; i<dolFile.getNumDataSections(); i++)
{
// get section data from dol file
fseek(temp_fd, 0, SEEK_SET);
dolFile.extractDataSection(i, temp_fd);
sprintf(name, ".data%d", i);
// add section data to elf file
fseek(temp_fd, 0, SEEK_SET);
elfFile.addSection(temp_fd, dolFile.getDataAddress(i), dolFile.getDataSize(i),
name, SHT_PROGBITS, SHF_ALLOC|SHF_WRITE, 32);
// add a program header for the section just added
// the section just added, was added as the last section
// u32 offset = elfFile.getSectionOffset(elfFile.getNumSections() - 1);
// elfFile.addProgramHeader(dolFile.getDataAddress(i), dolFile.getDataSize(i), offset, PT_LOAD, PF_WRITE|PF_READ, 32);
}
// add bss section to elf file
elfFile.addSectionHeader(dolFile.getBssAddress(), dolFile.getBssSize(),
".bss", 0, SHT_NOBITS, SHF_WRITE|SHF_ALLOC, 1);
// add a program header for the section just added
// the section just added, was added as the last section
// u32 index = elfFile.getNumSections() - 1;
// elfFile.addProgramHeader(elfFile.getSectionAddress(index), elfFile.getSectionSize(index), elfFile.getSectionOffset(index), PT_LOAD, PF_WRITE|PF_READ, 32);
// finish up
fclose(temp_fd);
remove("~temp.tmp");
elfFile.close();
printf( "\nConverted %s to to %s\n", dolFile.getFilename(), elfFilename);
return true;
}
