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Tweaking some compiler options

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This commit is contained in:
Maschell 2021-04-17 13:25:54 +02:00
parent a45d0d092d
commit b17b522d6b
7 changed files with 178 additions and 217 deletions
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4
Makefile
View File

@ -31,12 +31,12 @@ INCLUDES := source
#------------------------------------------------------------------------------- #-------------------------------------------------------------------------------
# options for code generation # options for code generation
#------------------------------------------------------------------------------- #-------------------------------------------------------------------------------
CFLAGS := -g -Wall -O2 -ffunction-sections \ CFLAGS := -g -Wall -O3 -ffunction-sections -fno-exceptions -fno-rtti\
$(MACHDEP) $(MACHDEP)
CFLAGS += $(INCLUDE) -D__WIIU__ -D__WUT__ CFLAGS += $(INCLUDE) -D__WIIU__ -D__WUT__
CXXFLAGS := $(CFLAGS) -std=c++17 CXXFLAGS := $(CFLAGS) -std=c++20
ASFLAGS := -g $(ARCH) ASFLAGS := -g $(ARCH)
LDFLAGS = -g $(ARCH) $(RPXSPECS) -Wl,-Map,$(notdir $*.map) LDFLAGS = -g $(ARCH) $(RPXSPECS) -Wl,-Map,$(notdir $*.map)

4
relocator/Makefile
View File

@ -42,8 +42,8 @@ INCLUDES := src
#--------------------------------------------------------------------------------- #---------------------------------------------------------------------------------
# options for code generation # options for code generation
#--------------------------------------------------------------------------------- #---------------------------------------------------------------------------------
CFLAGS := -g -Wall -O2 -ffunction-sections $(MACHDEP) $(INCLUDE) -D__WIIU__ -D__WUT__ CFLAGS := -g -Wall -O3 -ffunction-sections -fno-exceptions -fno-rtti $(MACHDEP) $(INCLUDE) -D__WIIU__ -D__WUT__
CXXFLAGS := $(CFLAGS) -std=c++17 CXXFLAGS := $(CFLAGS) -std=c++20
ASFLAGS := -mregnames ASFLAGS := -mregnames
LDFLAGS := -nostartfiles -Wl,--gc-sections LDFLAGS := -nostartfiles -Wl,--gc-sections

6
source/ElfUtils.cpp
View File

@ -17,7 +17,7 @@ int32_t LoadFileToMem(const char *relativefilepath, char **fileOut, uint32_t *si
int result = 0; int result = 0;
char *sdRootPath = NULL; char *sdRootPath = NULL;
if (!WHBMountSdCard()) { if (!WHBMountSdCard()) {
WHBLogPrintf("Failed to mount SD Card..."); DEBUG_FUNCTION_LINE("Failed to mount SD Card...");
result = -1; result = -1;
goto exit; goto exit;
} }
@ -25,12 +25,12 @@ int32_t LoadFileToMem(const char *relativefilepath, char **fileOut, uint32_t *si
sdRootPath = WHBGetSdCardMountPath(); sdRootPath = WHBGetSdCardMountPath();
sprintf(path, "%s/%s", sdRootPath, relativefilepath); sprintf(path, "%s/%s", sdRootPath, relativefilepath);
WHBLogPrintf("Loading file %s.", path); DEBUG_FUNCTION_LINE("Loading file %s.", path);
*fileOut = WHBReadWholeFile(path, sizeOut); *fileOut = WHBReadWholeFile(path, sizeOut);
if (!(*fileOut)) { if (!(*fileOut)) {
result = -2; result = -2;
WHBLogPrintf("WHBReadWholeFile(%s) returned NULL", path); DEBUG_FUNCTION_LINE("WHBReadWholeFile(%s) returned NULL", path);
goto exit; goto exit;
} }

341
source/elfio/elfio.hpp
View File

@ -67,50 +67,74 @@ set_##FNAME( TYPE val ) \
} \ } \
} \ } \
struct membuf : std::streambuf {
membuf(char* begin, char* end) {
this->setg(begin, begin, end);
}
pos_type seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which = std::ios_base::in) override {
if (dir == std::ios_base::cur)
gbump(off);
else if (dir == std::ios_base::end)
setg(eback(), egptr() + off, egptr());
else if (dir == std::ios_base::beg)
setg(eback(), eback() + off, egptr());
return gptr() - eback();
}
pos_type seekpos(pos_type sp, std::ios_base::openmode which) override {
return seekoff(sp - pos_type(off_type(0)), std::ios_base::beg, which);
}
};
namespace ELFIO { namespace ELFIO {
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
class elfio class elfio {
{ public:
public:
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
elfio() : sections( this ), segments( this ) elfio() : sections( this ), segments( this ) {
{
header = 0; header = 0;
current_file_pos = 0; current_file_pos = 0;
create( ELFCLASS32, ELFDATA2LSB ); create( ELFCLASS32, ELFDATA2LSB );
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
~elfio() ~elfio() {
{
clean(); clean();
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
void create( unsigned char file_class, unsigned char encoding ) void create( unsigned char file_class, unsigned char encoding ) {
{
clean(); clean();
convertor.setup( encoding ); convertor.setup( encoding );
header = create_header( file_class, encoding ); header = create_header( file_class, encoding );
create_mandatory_sections(); create_mandatory_sections();
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool load( const std::string& file_name ) bool load(char * buffer, size_t length) {
{ membuf sbuf(buffer, buffer + length);
std::istream in(&sbuf);
return load(in);
}
//------------------------------------------------------------------------------
bool load( const std::string& file_name ) {
std::ifstream stream; std::ifstream stream;
stream.open( file_name.c_str(), std::ios::in | std::ios::binary ); stream.open( file_name.c_str(), std::ios::in | std::ios::binary );
if ( !stream ) { if ( !stream ) {
return false; return false;
} }
return load(stream); auto res = load(stream);
stream.close();
return res;
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool load( std::istream &stream ) bool load( std::istream &stream ) {
{
clean(); clean();
unsigned char e_ident[EI_NIDENT]; unsigned char e_ident[EI_NIDENT];
@ -119,15 +143,15 @@ class elfio
// Is it ELF file? // Is it ELF file?
if ( stream.gcount() != sizeof( e_ident ) || if ( stream.gcount() != sizeof( e_ident ) ||
e_ident[EI_MAG0] != ELFMAG0 || e_ident[EI_MAG0] != ELFMAG0 ||
e_ident[EI_MAG1] != ELFMAG1 || e_ident[EI_MAG1] != ELFMAG1 ||
e_ident[EI_MAG2] != ELFMAG2 || e_ident[EI_MAG2] != ELFMAG2 ||
e_ident[EI_MAG3] != ELFMAG3 ) { e_ident[EI_MAG3] != ELFMAG3 ) {
return false; return false;
} }
if ( ( e_ident[EI_CLASS] != ELFCLASS64 ) && if ( ( e_ident[EI_CLASS] != ELFCLASS64 ) &&
( e_ident[EI_CLASS] != ELFCLASS32 )) { ( e_ident[EI_CLASS] != ELFCLASS32 )) {
return false; return false;
} }
@ -146,8 +170,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool save( const std::string& file_name ) bool save( const std::string& file_name ) {
{
std::ofstream stream; std::ofstream stream;
stream.open( file_name.c_str(), std::ios::out | std::ios::binary ); stream.open( file_name.c_str(), std::ios::out | std::ios::binary );
if ( !stream ) { if ( !stream ) {
@ -158,8 +181,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool save( std::ostream &stream ) bool save( std::ostream &stream ) {
{
if ( !stream || !header) { if ( !stream || !header) {
return false; return false;
} }
@ -176,7 +198,7 @@ class elfio
// Layout the first section right after the segment table // Layout the first section right after the segment table
current_file_pos = header->get_header_size() + current_file_pos = header->get_header_size() +
header->get_segment_entry_size() * header->get_segments_num(); header->get_segment_entry_size() * header->get_segments_num();
calc_segment_alignment(); calc_segment_alignment();
@ -212,41 +234,35 @@ class elfio
ELFIO_HEADER_ACCESS_GET_SET( Elf_Half, section_name_str_index ); ELFIO_HEADER_ACCESS_GET_SET( Elf_Half, section_name_str_index );
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
const endianess_convertor& get_convertor() const const endianess_convertor& get_convertor() const {
{
return convertor; return convertor;
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Elf_Xword get_default_entry_size( Elf_Word section_type ) const Elf_Xword get_default_entry_size( Elf_Word section_type ) const {
{
switch( section_type ) { switch( section_type ) {
case SHT_RELA: case SHT_RELA:
if ( header->get_class() == ELFCLASS64 ) { if ( header->get_class() == ELFCLASS64 ) {
return sizeof( Elf64_Rela ); return sizeof( Elf64_Rela );
} } else {
else {
return sizeof( Elf32_Rela ); return sizeof( Elf32_Rela );
} }
case SHT_REL: case SHT_REL:
if ( header->get_class() == ELFCLASS64 ) { if ( header->get_class() == ELFCLASS64 ) {
return sizeof( Elf64_Rel ); return sizeof( Elf64_Rel );
} } else {
else {
return sizeof( Elf32_Rel ); return sizeof( Elf32_Rel );
} }
case SHT_SYMTAB: case SHT_SYMTAB:
if ( header->get_class() == ELFCLASS64 ) { if ( header->get_class() == ELFCLASS64 ) {
return sizeof( Elf64_Sym ); return sizeof( Elf64_Sym );
} } else {
else {
return sizeof( Elf32_Sym ); return sizeof( Elf32_Sym );
} }
case SHT_DYNAMIC: case SHT_DYNAMIC:
if ( header->get_class() == ELFCLASS64 ) { if ( header->get_class() == ELFCLASS64 ) {
return sizeof( Elf64_Dyn ); return sizeof( Elf64_Dyn );
} } else {
else {
return sizeof( Elf32_Dyn ); return sizeof( Elf32_Dyn );
} }
default: default:
@ -255,49 +271,48 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
private: private:
bool is_offset_in_section( Elf64_Off offset, const section* sec ) const { bool is_offset_in_section( Elf64_Off offset, const section* sec ) const {
return offset >= sec->get_offset() && offset < sec->get_offset()+sec->get_size(); return offset >= sec->get_offset() && offset < sec->get_offset()+sec->get_size();
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
public: public:
//! returns an empty string if no problems are detected, //! returns an empty string if no problems are detected,
//! or a string containing an error message if problems are found //! or a string containing an error message if problems are found
std::string validate() const { std::string validate() const {
// check for overlapping sections in the file // check for overlapping sections in the file
for ( int i = 0; i < sections.size(); ++i) { for ( int i = 0; i < sections.size(); ++i) {
for ( int j = i+1; j < sections.size(); ++j ) { for ( int j = i+1; j < sections.size(); ++j ) {
const section* a = sections[i]; const section* a = sections[i];
const section* b = sections[j]; const section* b = sections[j];
if ( !(a->get_type() & SHT_NOBITS) if ( !(a->get_type() & SHT_NOBITS)
&& !(b->get_type() & SHT_NOBITS) && !(b->get_type() & SHT_NOBITS)
&& (a->get_size() > 0) && (a->get_size() > 0)
&& (b->get_size() > 0) && (b->get_size() > 0)
&& (a->get_offset() > 0) && (a->get_offset() > 0)
&& (b->get_offset() > 0)) { && (b->get_offset() > 0)) {
if ( is_offset_in_section( a->get_offset(), b ) if ( is_offset_in_section( a->get_offset(), b )
|| is_offset_in_section( a->get_offset()+a->get_size()-1, b ) || is_offset_in_section( a->get_offset()+a->get_size()-1, b )
|| is_offset_in_section( b->get_offset(), a ) || is_offset_in_section( b->get_offset(), a )
|| is_offset_in_section( b->get_offset()+b->get_size()-1, a )) { || is_offset_in_section( b->get_offset()+b->get_size()-1, a )) {
return "Sections " + a->get_name() + " and " + b->get_name() + " overlap in file"; return "Sections " + a->get_name() + " and " + b->get_name() + " overlap in file";
} }
} }
} }
} }
// more checks to be added here... // more checks to be added here...
return ""; return "";
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
private: private:
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
void clean() void clean() {
{
delete header; delete header;
header = 0; header = 0;
@ -315,19 +330,16 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
elf_header* create_header( unsigned char file_class, unsigned char encoding ) elf_header* create_header( unsigned char file_class, unsigned char encoding ) {
{
elf_header* new_header = 0; elf_header* new_header = 0;
if ( file_class == ELFCLASS64 ) { if ( file_class == ELFCLASS64 ) {
new_header = new elf_header_impl< Elf64_Ehdr >( &convertor, new_header = new elf_header_impl< Elf64_Ehdr >( &convertor,
encoding ); encoding );
} } else if ( file_class == ELFCLASS32 ) {
else if ( file_class == ELFCLASS32 ) {
new_header = new elf_header_impl< Elf32_Ehdr >( &convertor, new_header = new elf_header_impl< Elf32_Ehdr >( &convertor,
encoding ); encoding );
} } else {
else {
return 0; return 0;
} }
@ -335,18 +347,15 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
section* create_section() section* create_section() {
{
section* new_section; section* new_section;
unsigned char file_class = get_class(); unsigned char file_class = get_class();
if ( file_class == ELFCLASS64 ) { if ( file_class == ELFCLASS64 ) {
new_section = new section_impl<Elf64_Shdr>( &convertor ); new_section = new section_impl<Elf64_Shdr>( &convertor );
} } else if ( file_class == ELFCLASS32 ) {
else if ( file_class == ELFCLASS32 ) {
new_section = new section_impl<Elf32_Shdr>( &convertor ); new_section = new section_impl<Elf32_Shdr>( &convertor );
} } else {
else {
return 0; return 0;
} }
@ -358,18 +367,15 @@ class elfio
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
segment* create_segment() segment* create_segment() {
{
segment* new_segment; segment* new_segment;
unsigned char file_class = header->get_class(); unsigned char file_class = header->get_class();
if ( file_class == ELFCLASS64 ) { if ( file_class == ELFCLASS64 ) {
new_segment = new segment_impl<Elf64_Phdr>( &convertor ); new_segment = new segment_impl<Elf64_Phdr>( &convertor );
} } else if ( file_class == ELFCLASS32 ) {
else if ( file_class == ELFCLASS32 ) {
new_segment = new segment_impl<Elf32_Phdr>( &convertor ); new_segment = new segment_impl<Elf32_Phdr>( &convertor );
} } else {
else {
return 0; return 0;
} }
@ -380,8 +386,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
void create_mandatory_sections() void create_mandatory_sections() {
{
// Create null section without calling to 'add_section' as no string // Create null section without calling to 'add_section' as no string
// section containing section names exists yet // section containing section names exists yet
section* sec0 = create_section(); section* sec0 = create_section();
@ -396,8 +401,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Elf_Half load_sections( std::istream& stream ) Elf_Half load_sections( std::istream& stream ) {
{
Elf_Half entry_size = header->get_section_entry_size(); Elf_Half entry_size = header->get_section_entry_size();
Elf_Half num = header->get_sections_num(); Elf_Half num = header->get_sections_num();
Elf64_Off offset = header->get_sections_offset(); Elf64_Off offset = header->get_sections_offset();
@ -433,15 +437,14 @@ class elfio
//! they just need to be in the same address space //! they just need to be in the same address space
bool is_sect_in_seg ( Elf64_Off sect_begin, Elf_Xword sect_size, Elf64_Off seg_begin, Elf64_Off seg_end ) { bool is_sect_in_seg ( Elf64_Off sect_begin, Elf_Xword sect_size, Elf64_Off seg_begin, Elf64_Off seg_end ) {
return seg_begin <= sect_begin return seg_begin <= sect_begin
&& sect_begin + sect_size <= seg_end && sect_begin + sect_size <= seg_end
&& sect_begin < seg_end; // this is important criteria when sect_size == 0 && sect_begin < seg_end; // this is important criteria when sect_size == 0
// Example: seg_begin=10, seg_end=12 (-> covering the bytes 10 and 11) // Example: seg_begin=10, seg_end=12 (-> covering the bytes 10 and 11)
// sect_begin=12, sect_size=0 -> shall return false! // sect_begin=12, sect_size=0 -> shall return false!
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool load_segments( std::istream& stream ) bool load_segments( std::istream& stream ) {
{
Elf_Half entry_size = header->get_segment_entry_size(); Elf_Half entry_size = header->get_segment_entry_size();
Elf_Half num = header->get_segments_num(); Elf_Half num = header->get_segments_num();
Elf64_Off offset = header->get_segments_offset(); Elf64_Off offset = header->get_segments_offset();
@ -452,11 +455,9 @@ class elfio
if ( file_class == ELFCLASS64 ) { if ( file_class == ELFCLASS64 ) {
seg = new segment_impl<Elf64_Phdr>( &convertor ); seg = new segment_impl<Elf64_Phdr>( &convertor );
} } else if ( file_class == ELFCLASS32 ) {
else if ( file_class == ELFCLASS32 ) {
seg = new segment_impl<Elf32_Phdr>( &convertor ); seg = new segment_impl<Elf32_Phdr>( &convertor );
} } else {
else {
return false; return false;
} }
@ -474,11 +475,11 @@ class elfio
// SHF_ALLOC sections are matched based on the virtual address // SHF_ALLOC sections are matched based on the virtual address
// otherwise the file offset is matched // otherwise the file offset is matched
if( psec->get_flags() & SHF_ALLOC if( psec->get_flags() & SHF_ALLOC
? is_sect_in_seg( psec->get_address(), psec->get_size(), segVBaseAddr, segVEndAddr ) ? is_sect_in_seg( psec->get_address(), psec->get_size(), segVBaseAddr, segVEndAddr )
: is_sect_in_seg( psec->get_offset(), psec->get_size(), segBaseOffset, segEndOffset )) { : is_sect_in_seg( psec->get_offset(), psec->get_size(), segBaseOffset, segEndOffset )) {
// Alignment of segment shall not be updated, to preserve original value // Alignment of segment shall not be updated, to preserve original value
// It will be re-calculated on saving. // It will be re-calculated on saving.
seg->add_section_index( psec->get_index(), 0 ); seg->add_section_index( psec->get_index(), 0 );
} }
} }
@ -490,14 +491,12 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool save_header( std::ostream& stream ) bool save_header( std::ostream& stream ) {
{
return header->save( stream ); return header->save( stream );
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool save_sections( std::ostream& stream ) bool save_sections( std::ostream& stream ) {
{
for ( unsigned int i = 0; i < sections_.size(); ++i ) { for ( unsigned int i = 0; i < sections_.size(); ++i ) {
section *sec = sections_.at(i); section *sec = sections_.at(i);
@ -511,13 +510,12 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool save_segments( std::ostream& stream ) bool save_segments( std::ostream& stream ) {
{
for ( unsigned int i = 0; i < segments_.size(); ++i ) { for ( unsigned int i = 0; i < segments_.size(); ++i ) {
segment *seg = segments_.at(i); segment *seg = segments_.at(i);
std::streampos headerPosition = header->get_segments_offset() + std::streampos headerPosition = header->get_segments_offset() +
header->get_segment_entry_size()*seg->get_index(); header->get_segment_entry_size()*seg->get_index();
seg->save( stream, headerPosition, seg->get_offset() ); seg->save( stream, headerPosition, seg->get_offset() );
} }
@ -525,14 +523,13 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool is_section_without_segment( unsigned int section_index ) bool is_section_without_segment( unsigned int section_index ) {
{
bool found = false; bool found = false;
for ( unsigned int j = 0; !found && ( j < segments.size() ); ++j ) { for ( unsigned int j = 0; !found && ( j < segments.size() ); ++j ) {
for ( unsigned int k = 0; for ( unsigned int k = 0;
!found && ( k < segments[j]->get_sections_num() ); !found && ( k < segments[j]->get_sections_num() );
++k ) { ++k ) {
found = segments[j]->get_section_index_at( k ) == section_index; found = segments[j]->get_section_index_at( k ) == section_index;
} }
} }
@ -541,8 +538,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool is_subsequence_of( segment* seg1, segment* seg2 ) bool is_subsequence_of( segment* seg1, segment* seg2 ) {
{
// Return 'true' if sections of seg1 are a subset of sections in seg2 // Return 'true' if sections of seg1 are a subset of sections in seg2
const std::vector<Elf_Half>& sections1 = seg1->get_sections(); const std::vector<Elf_Half>& sections1 = seg1->get_sections();
const std::vector<Elf_Half>& sections2 = seg2->get_sections(); const std::vector<Elf_Half>& sections2 = seg2->get_sections();
@ -557,8 +553,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
std::vector<segment*> get_ordered_segments( ) std::vector<segment*> get_ordered_segments( ) {
{
std::vector<segment*> res; std::vector<segment*> res;
std::deque<segment*> worklist; std::deque<segment*> worklist;
@ -570,7 +565,7 @@ class elfio
size_t nextSlot = 0; size_t nextSlot = 0;
for( size_t i = 0; i < worklist.size(); ++i ) { for( size_t i = 0; i < worklist.size(); ++i ) {
if( i != nextSlot && worklist[i]->is_offset_initialized() if( i != nextSlot && worklist[i]->is_offset_initialized()
&& worklist[i]->get_offset() == 0 ) { && worklist[i]->get_offset() == 0 ) {
if (worklist[nextSlot]->get_offset() == 0) { if (worklist[nextSlot]->get_offset() == 0) {
++nextSlot; ++nextSlot;
} }
@ -601,8 +596,7 @@ class elfio
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool layout_sections_without_segments( ) bool layout_sections_without_segments( ) {
{
for ( unsigned int i = 0; i < sections_.size(); ++i ) { for ( unsigned int i = 0; i < sections_.size(); ++i ) {
if ( is_section_without_segment( i ) ) { if ( is_section_without_segment( i ) ) {
section *sec = sections_[i]; section *sec = sections_[i];
@ -610,14 +604,14 @@ class elfio
Elf_Xword section_align = sec->get_addr_align(); Elf_Xword section_align = sec->get_addr_align();
if ( section_align > 1 && current_file_pos % section_align != 0 ) { if ( section_align > 1 && current_file_pos % section_align != 0 ) {
current_file_pos += section_align - current_file_pos += section_align -
current_file_pos % section_align; current_file_pos % section_align;
} }
if ( 0 != sec->get_index() ) if ( 0 != sec->get_index() )
sec->set_offset(current_file_pos); sec->set_offset(current_file_pos);
if ( SHT_NOBITS != sec->get_type() && if ( SHT_NOBITS != sec->get_type() &&
SHT_NULL != sec->get_type() ) { SHT_NULL != sec->get_type() ) {
current_file_pos += sec->get_size(); current_file_pos += sec->get_size();
} }
} }
@ -628,8 +622,7 @@ class elfio
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
void calc_segment_alignment( ) void calc_segment_alignment( ) {
{
for( std::vector<segment*>::iterator s = segments_.begin(); s != segments_.end(); ++s ) { for( std::vector<segment*>::iterator s = segments_.begin(); s != segments_.end(); ++s ) {
segment* seg = *s; segment* seg = *s;
for ( int i = 0; i < seg->get_sections_num(); ++i ) { for ( int i = 0; i < seg->get_sections_num(); ++i ) {
@ -642,8 +635,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool layout_segments_and_their_sections( ) bool layout_segments_and_their_sections( ) {
{
std::vector<segment*> worklist; std::vector<segment*> worklist;
std::vector<bool> section_generated(sections.size(),false); std::vector<bool> section_generated(sections.size(),false);
@ -662,7 +654,7 @@ class elfio
if ( seg->get_type() == PT_PHDR && seg->get_sections_num() == 0 ) { if ( seg->get_type() == PT_PHDR && seg->get_sections_num() == 0 ) {
seg_start_pos = header->get_segments_offset(); seg_start_pos = header->get_segments_offset();
segment_memory = segment_filesize = segment_memory = segment_filesize =
header->get_segment_entry_size() * header->get_segments_num(); header->get_segment_entry_size() * header->get_segments_num();
} }
// Special case: // Special case:
// Segments which start with the NULL section and have further sections // Segments which start with the NULL section and have further sections
@ -676,7 +668,7 @@ class elfio
// New segments with not generated sections // New segments with not generated sections
// have to be aligned // have to be aligned
else if ( seg->get_sections_num() else if ( seg->get_sections_num()
&& !section_generated[seg->get_section_index_at( 0 )] ) { && !section_generated[seg->get_section_index_at( 0 )] ) {
Elf_Xword align = seg->get_align() > 0 ? seg->get_align() : 1; Elf_Xword align = seg->get_align() > 0 ? seg->get_align() : 1;
Elf64_Off cur_page_alignment = current_file_pos % align; Elf64_Off cur_page_alignment = current_file_pos % align;
Elf64_Off req_page_alignment = seg->get_virtual_address() % align; Elf64_Off req_page_alignment = seg->get_virtual_address() % align;
@ -684,8 +676,7 @@ class elfio
current_file_pos += ( seg->get_align() + error ) % align; current_file_pos += ( seg->get_align() + error ) % align;
seg_start_pos = current_file_pos; seg_start_pos = current_file_pos;
} } else if ( seg->get_sections_num() ) {
else if ( seg->get_sections_num() ) {
seg_start_pos = sections[seg->get_section_index_at( 0 )]->get_offset(); seg_start_pos = sections[seg->get_section_index_at( 0 )]->get_offset();
} }
@ -704,21 +695,20 @@ class elfio
Elf_Xword secAlign = 0; Elf_Xword secAlign = 0;
// Fix up the alignment // Fix up the alignment
if ( !section_generated[index] && sec->is_address_initialized() if ( !section_generated[index] && sec->is_address_initialized()
&& SHT_NOBITS != sec->get_type() && SHT_NOBITS != sec->get_type()
&& SHT_NULL != sec->get_type() && SHT_NULL != sec->get_type()
&& 0 != sec->get_size() ) { && 0 != sec->get_size() ) {
// Align the sections based on the virtual addresses // Align the sections based on the virtual addresses
// when possible (this is what matters for execution) // when possible (this is what matters for execution)
Elf64_Off req_offset = sec->get_address() - seg->get_virtual_address(); Elf64_Off req_offset = sec->get_address() - seg->get_virtual_address();
Elf64_Off cur_offset = current_file_pos - seg_start_pos; Elf64_Off cur_offset = current_file_pos - seg_start_pos;
if ( req_offset < cur_offset) { if ( req_offset < cur_offset) {
// something has gone awfully wrong, abort! // something has gone awfully wrong, abort!
// secAlign would turn out negative, seeking backwards and overwriting previous data // secAlign would turn out negative, seeking backwards and overwriting previous data
return false; return false;
} }
secAlign = req_offset - cur_offset; secAlign = req_offset - cur_offset;
} } else if (!section_generated[index] && !sec->is_address_initialized() ) {
else if (!section_generated[index] && !sec->is_address_initialized() ) {
// If no address has been specified then only the section // If no address has been specified then only the section
// alignment constraint has to be matched // alignment constraint has to be matched
Elf_Xword align = sec->get_addr_align(); Elf_Xword align = sec->get_addr_align();
@ -727,8 +717,7 @@ class elfio
} }
Elf64_Off error = current_file_pos % align; Elf64_Off error = current_file_pos % align;
secAlign = ( align - error ) % align; secAlign = ( align - error ) % align;
} } else if (section_generated[index] ) {
else if (section_generated[index] ) {
// Alignment for already generated sections // Alignment for already generated sections
secAlign = sec->get_offset() - seg_start_pos - segment_filesize; secAlign = sec->get_offset() - seg_start_pos - segment_filesize;
} }
@ -736,8 +725,8 @@ class elfio
// Determine the segment file and memory sizes // Determine the segment file and memory sizes
// Special case .tbss section (NOBITS) in non TLS segment // Special case .tbss section (NOBITS) in non TLS segment
if ( (sec->get_flags() & SHF_ALLOC) if ( (sec->get_flags() & SHF_ALLOC)
&& !( (sec->get_flags() & SHF_TLS) && (seg->get_type() != PT_TLS) && !( (sec->get_flags() & SHF_TLS) && (seg->get_type() != PT_TLS)
&& ( SHT_NOBITS == sec->get_type())) ) && ( SHT_NOBITS == sec->get_type())) )
segment_memory += sec->get_size() + secAlign; segment_memory += sec->get_size() + secAlign;
if ( SHT_NOBITS != sec->get_type() && SHT_NULL != sec->get_type() ) if ( SHT_NOBITS != sec->get_type() && SHT_NULL != sec->get_type() )
segment_filesize += sec->get_size() + secAlign; segment_filesize += sec->get_size() + secAlign;
@ -755,10 +744,10 @@ class elfio
+ current_file_pos - seg_start_pos); + current_file_pos - seg_start_pos);
if ( 0 != sec->get_index() ) if ( 0 != sec->get_index() )
sec->set_offset(current_file_pos); sec->set_offset(current_file_pos);
if ( SHT_NOBITS != sec->get_type() && SHT_NULL != sec->get_type() ) if ( SHT_NOBITS != sec->get_type() && SHT_NULL != sec->get_type() )
current_file_pos += sec->get_size(); current_file_pos += sec->get_size();
section_generated[index] = true; section_generated[index] = true;
} }
@ -779,8 +768,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
bool layout_section_table() bool layout_section_table() {
{
// Simply place the section table at the end for now // Simply place the section table at the end for now
Elf64_Off alignmentError = current_file_pos % 4; Elf64_Off alignmentError = current_file_pos % 4;
current_file_pos += ( 4 - alignmentError ) % 4; current_file_pos += ( 4 - alignmentError ) % 4;
@ -790,25 +778,22 @@ class elfio
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
public: public:
friend class Sections; friend class Sections;
class Sections { class Sections {
public: public:
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Sections( elfio* parent_ ) : Sections( elfio* parent_ ) :
parent( parent_ ) parent( parent_ ) {
{
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Elf_Half size() const Elf_Half size() const {
{
return (Elf_Half)parent->sections_.size(); return (Elf_Half)parent->sections_.size();
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
section* operator[]( unsigned int index ) const section* operator[]( unsigned int index ) const {
{
section* sec = 0; section* sec = 0;
if ( index < parent->sections_.size() ) { if ( index < parent->sections_.size() ) {
@ -819,14 +804,13 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
section* operator[]( const std::string& name ) const section* operator[]( const std::string& name ) const {
{
section* sec = 0; section* sec = 0;
std::vector<section*>::const_iterator it; std::vector<section*>::const_iterator it;
for ( it = parent->sections_.begin(); for ( it = parent->sections_.begin();
it != parent->sections_.end(); it != parent->sections_.end();
++it ) { ++it ) {
if ( (*it)->get_name() == name ) { if ( (*it)->get_name() == name ) {
sec = *it; sec = *it;
break; break;
@ -837,8 +821,7 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
section* add( const std::string& name ) section* add( const std::string& name ) {
{
section* new_section = parent->create_section(); section* new_section = parent->create_section();
new_section->set_name( name ); new_section->set_name( name );
@ -872,37 +855,33 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
private: private:
elfio* parent; elfio* parent;
} sections; } sections;
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
public: public:
friend class Segments; friend class Segments;
class Segments { class Segments {
public: public:
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Segments( elfio* parent_ ) : Segments( elfio* parent_ ) :
parent( parent_ ) parent( parent_ ) {
{
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
Elf_Half size() const Elf_Half size() const {
{
return (Elf_Half)parent->segments_.size(); return (Elf_Half)parent->segments_.size();
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
segment* operator[]( unsigned int index ) const segment* operator[]( unsigned int index ) const {
{
return parent->segments_[index]; return parent->segments_[index];
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
segment* add() segment* add() {
{
return parent->create_segment(); return parent->create_segment();
} }
@ -927,12 +906,12 @@ class elfio
} }
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
private: private:
elfio* parent; elfio* parent;
} segments; } segments;
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
private: private:
elf_header* header; elf_header* header;
std::vector<section*> sections_; std::vector<section*> sections_;
std::vector<segment*> segments_; std::vector<segment*> segments_;

2
source/elfio/elfio_relocation.hpp
View File

@ -144,7 +144,7 @@ class relocation_section_accessor_template
Elf_Half& section) const Elf_Half& section) const
{ {
// Do regular job // Do regular job
Elf_Word symbol = 0; Elf_Word symbol;
bool ret = get_entry( index, offset, symbol, type, addend ); bool ret = get_entry( index, offset, symbol, type, addend );
// Find the symbol // Find the symbol

32
source/elfio/elfio_section.hpp
View File

@ -160,14 +160,8 @@ class section_impl : public section
set_data( const char* raw_data, Elf_Word size ) set_data( const char* raw_data, Elf_Word size )
{ {
if ( get_type() != SHT_NOBITS ) { if ( get_type() != SHT_NOBITS ) {
delete [] data; delete [] data;
try { data = new char[size];
data = new char[size];
} catch (const std::bad_alloc&) {
data = 0;
data_size = 0;
size = 0;
}
if ( 0 != data && 0 != raw_data ) { if ( 0 != data && 0 != raw_data ) {
data_size = size; data_size = size;
std::copy( raw_data, raw_data + size, data ); std::copy( raw_data, raw_data + size, data );
@ -195,12 +189,8 @@ class section_impl : public section
else { else {
data_size = 2*( data_size + size); data_size = 2*( data_size + size);
char* new_data; char* new_data;
try { new_data = new char[data_size];
new_data = new char[data_size];
} catch (const std::bad_alloc&) {
new_data = 0;
size = 0;
}
if ( 0 != new_data ) { if ( 0 != new_data ) {
std::copy( data, data + get_size(), new_data ); std::copy( data, data + get_size(), new_data );
std::copy( raw_data, raw_data + size, new_data + get_size() ); std::copy( raw_data, raw_data + size, new_data + get_size() );
@ -247,12 +237,8 @@ class section_impl : public section
Elf_Xword size = get_size(); Elf_Xword size = get_size();
if ( 0 == data && SHT_NULL != get_type() && SHT_NOBITS != get_type() && size < get_stream_size()) { if ( 0 == data && SHT_NULL != get_type() && SHT_NOBITS != get_type() && size < get_stream_size()) {
try {
data = new char[size + 1]; data = new char[size + 1];
} catch (const std::bad_alloc&) {
data = 0;
data_size = 0;
}
if ( ( 0 != size ) && ( 0 != data ) ) { if ( ( 0 != size ) && ( 0 != data ) ) {
stream.seekg( (*convertor)( header.sh_offset ) ); stream.seekg( (*convertor)( header.sh_offset ) );
@ -283,12 +269,12 @@ class section_impl : public section
ret = inflate(&s, Z_FINISH); ret = inflate(&s, Z_FINISH);
if (ret != Z_OK && ret != Z_STREAM_END){ if (ret != Z_OK && ret != Z_STREAM_END){
DEBUG_FUNCTION_LINE("NOOOO\n"); DEBUG_FUNCTION_LINE("NOOOO");
} }
inflateEnd(&s); inflateEnd(&s);
free(data); delete [] data;
data = uncompressedData; data = uncompressedData;
data_size = uncompressed_size; data_size = uncompressed_size;
set_size(uncompressed_size); set_size(uncompressed_size);
@ -301,7 +287,7 @@ class section_impl : public section
} }
}else{ }else{
set_size(0); set_size(0);
DEBUG_FUNCTION_LINE("Failed to allocate memory.\n"); DEBUG_FUNCTION_LINE("Failed to allocate memory.");
} }
} }
} }

6
source/elfio/elfio_segment.hpp
View File

@ -206,11 +206,7 @@ class segment_impl : public segment
data = 0; data = 0;
} }
else { else {
try { data = new char[size + 1];
data = new char[size + 1];
} catch (const std::bad_alloc&) {
data = 0;
}
if ( 0 != data ) { if ( 0 != data ) {
stream.read( data, size ); stream.read( data, size );