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#include "ElfBinary.class.h"
#include <TaskManager/Task.ns.h>
ElfBinary::~ElfBinary() {
for (SimpleList<phdr_t> *iter = m_phdr; iter != 0; iter = iter->next()) {
delete iter->v().data;
}
}
Binary* ElfBinary::load(File& file) {
elf_ehdr_t hdr;
if (!file.read<elf_ehdr_t> (&hdr)) return 0;
//Verify we have an elf file
if (hdr.e_ident[0] != 0x7F or hdr.e_ident[1] != 'E' or hdr.e_ident[2] != 'L' or hdr.e_ident[3] != 'F') return 0;
//Store elf header into a new ElfBinary
ElfBinary* b = new ElfBinary();
memcpy((u8int*)&b->m_ehdr, (const u8int*) &hdr, sizeof(elf_ehdr_t));
b->m_phdr = 0;
//Load program headers
file.seek(hdr.e_phoff, SM_BEGINNING);
for (u32int i = 0; i < hdr.e_phnum; i++) {
b->m_phdr = b->m_phdr->cons(phdr_t());
file.read<elf_phdr_t>(&b->m_phdr->v().h); //Load current entry from file
}
//Load data
for (SimpleList<phdr_t> *iter = b->m_phdr; iter != 0; iter = iter->next()) {
iter->v().data = (u8int*)Mem::alloc(iter->v().h.p_filesz);
file.seek(iter->v().h.p_offset, SM_BEGINNING);
file.read(iter->v().h.p_filesz, iter->v().data);
}
return b;
}
thread_entry_t ElfBinary::toProcess(Process* p) {
for (SimpleList<phdr_t> *iter = m_phdr; iter != 0; iter = iter->next()) {
phdr_t &e = iter->v();
if (e.h.p_type == PT_LOAD) {
for (u32int i = e.h.p_vaddr; i < e.h.p_vaddr + e.h.p_memsz; i += 0x1000) {
p->getPagedir()->allocFrame(i, true, true);
}
p->getPagedir()->switchTo();
memcpy((u8int*)e.h.p_vaddr, (const u8int*)e.data, e.h.p_filesz);
if (e.h.p_memsz > e.h.p_filesz) { //set to zero all the remaining space
u8int* x = (u8int*)e.h.p_vaddr;
for (u32int i = e.h.p_vaddr + e.h.p_filesz; i < e.h.p_filesz; i++) {
x[i] = 0;
}
}
}
}
return (thread_entry_t)m_ehdr.e_entry;
}
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