/** Pre-unparsing updates */
bool
SgAsmElfSegmentTable::reallocate()
{
bool reallocated = false;
/* Resize based on word size from ELF File Header */
size_t opt_size, nentries;
rose_addr_t need = calculate_sizes(NULL, NULL, &opt_size, &nentries);
if (need < get_size()) {
if (is_mapped()) {
ROSE_ASSERT(get_mapped_size()==get_size());
set_mapped_size(need);
}
set_size(need);
reallocated = true;
} else if (need > get_size()) {
get_file()->shift_extend(this, 0, need-get_size(), SgAsmGenericFile::ADDRSP_ALL, SgAsmGenericFile::ELASTIC_HOLE);
reallocated = true;
}
/* Update data members in the ELF File Header. No need to return true for these changes. */
SgAsmElfFileHeader *fhdr = dynamic_cast<SgAsmElfFileHeader*>(get_header());
fhdr->set_phextrasz(opt_size);
fhdr->set_e_phnum(nentries);
return reallocated;
}
/** Attaches a previously unattached ELF Segment (SgAsmElfSection) to the ELF Segment Table (SgAsmElfSegmentTable). This
* method complements SgAsmElfSection::init_from_segment_table. This method initializes the segment table from the segment
* while init_from_segment_table() initializes the segment from the segment table.
*
* ELF Segments are represented by SgAsmElfSection objects since ELF Segments and ELF Sections overlap very much in their
* features and thus should share an interface. An SgAsmElfSection can appear in the ELF Section Table and/or the ELF Segment
* Table and you can determine where it was located by calling get_section_entry() and get_segment_entry().
*
* Returns the new segment table entry linked into the AST. */
SgAsmElfSegmentTableEntry *
SgAsmElfSegmentTable::add_section(SgAsmElfSection *section)
{
ROSE_ASSERT(section!=NULL);
ROSE_ASSERT(section->get_file()==get_file());
ROSE_ASSERT(section->get_header()==get_header());
ROSE_ASSERT(section->get_segment_entry()==NULL); /* must not be in the segment table yet */
SgAsmElfFileHeader *fhdr = dynamic_cast<SgAsmElfFileHeader*>(get_header());
ROSE_ASSERT(fhdr);
/* Assign a slot in the segment table */
int idx = fhdr->get_e_phnum();
fhdr->set_e_phnum(idx+1);
/* Create a new segment table entry */
SgAsmElfSegmentTableEntry *shdr = new SgAsmElfSegmentTableEntry;
shdr->set_index(idx);
shdr->update_from_section(section);
section->set_segment_entry(shdr);
return shdr;
}
