blob: d7d1b29c2e22954702bc8e2d907c6516ac61d672 (
plain) (
tree)
|
|
#include "arch/elf.h"
#include "string.h"
#include "memory.h"
#include "print.h"
uintptr_t
elf_load(const void *data, size_t len)
{
if(data == NULL) return 0;
if(len < 4) return 0;
elf_header_t *ehdr = (elf_header_t*)data;
if(ehdr->ei_mag[0] != EI_MAG0 ||
ehdr->ei_mag[1] != EI_MAG1 ||
ehdr->ei_mag[2] != EI_MAG2 ||
ehdr->ei_mag[3] != EI_MAG3) return 0;
if(ehdr->ei_class != EI_CLASS_64) {
kerrf("Jove does not support ELF files of class CLASS32\n");
return 0;
}
if(ehdr->e_type != ET_EXEC) {
kerrf("Jove does not support ELF files other than ET_EXEC\n");
return 0;
}
uint64_t entry = ehdr->e_entry;
size_t phdrc = ehdr->e_phnum;
elf_phdr_t *phdrs = (elf_phdr_t*)((uintptr_t)data + ehdr->e_phoff);
for(size_t phdri = 0; phdri < phdrc; phdri++)
{
elf_phdr_t *phdr = &phdrs[phdri];
void *pdata = (void*)phdr->p_vaddr;
vm_ensure(
phdr->p_vaddr,
phdr->p_vaddr + phdr->p_memsz,
(page_flags_t) {
.present = true,
.writeable = true,
.useraccess = true,
.executable = true
});
if(phdr->p_type == PT_LOAD)
{
kdbgf("PT_LOAD %#016X [%#016X] -> %#016X\n",
(uintptr_t)data + phdr->p_offset,
phdr->p_filesz,
pdata);
memcpy(pdata, (void*)((uintptr_t)data + phdr->p_offset), phdr->p_filesz);
}
}
return entry;
}
|