1 files changed, 55 insertions, 0 deletions
diff --git a/Source/Kernel/Linker/ElfBinary.class.cpp b/Source/Kernel/Linker/ElfBinary.class.cpp
new file mode 100644
index 0000000..27e5474
--- /dev/null
+++ b/Source/Kernel/Linker/ElfBinary.class.cpp
@@ -0,0 +1,55 @@
+#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;
+	file.read<elf_ehdr_t> (&hdr);
+	//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;
+}