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#include "el1_common.h"
#include "elf.h"
#include "mem_util.h"
/* Simple ELF loader for loading EL0 image */
void *el1_load_el0(char *elfbase, char *start_va)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)elfbase;
size_t off;
int i;
/* Map the ELF header in so we can determine how much more to map */
mem_map_pa((uintptr_t)elfbase, (uintptr_t)elfbase, 0, PTE_USER_RW);
/* Make sure this is an appropriate ELF image */
if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
ehdr->e_ident[EI_MAG3] != ELFMAG3) {
DEBUG_MSG("Invalid ELF header, exiting...\n");
SMC_EXIT();
} else if (ehdr->e_type != ET_DYN &&
(ehdr->e_machine != EM_ARM || ehdr->e_machine != EM_AARCH64)) {
DEBUG_MSG("Incorrect ELF type (type = %d, machine = %d), exiting...\n",
ehdr->e_type, ehdr->e_machine);
SMC_EXIT();
} else {
DEBUG_MSG("Loading %s EL0 test image...\n",
(ehdr->e_machine == EM_ARM) ? "aarch32" : "aarch64");
}
/* Size of the ELF to map */
size_t elf_len = ehdr->e_shoff + (ehdr->e_shentsize * ehdr->e_shnum);
/* Finish mapping the remainder of the ELF pages in if any */
for (off = 0x1000; off < elf_len; off += 0x1000) {
mem_map_pa((uintptr_t)elfbase + off, (uintptr_t)elfbase + off,
0, PTE_USER_RW);
}
Elf32_Shdr *shdr = (Elf32_Shdr *)((char *)elfbase + ehdr->e_shoff);
Elf32_Shdr *strshdr = &shdr[ehdr->e_shstrndx];
char *strsec = (char *)ehdr + strshdr->sh_offset;
for (i = 0; i < ehdr->e_shnum; i++) {
char *secname = strsec + shdr[i].sh_name;
if (!strcmp(secname, ".text") || !strcmp(secname, ".data")) {
uintptr_t sect = (uintptr_t)((char *)elfbase + shdr[i].sh_offset);
char *base_va = start_va + shdr[i].sh_addr;
DEBUG_MSG("\tloading %s section: 0x%x bytes @ 0x%lx\n",
secname, shdr[i].sh_size, base_va);
for (off = 0; off < shdr[i].sh_size; off += 0x1000) {
mem_map_va((uintptr_t)(base_va + off));
memcpy((void *)(base_va + off), (void *)(sect + off), 0x1000);
}
}
}
/* Unmap the FLASH ELF image */
for (off = 0; off < elf_len; off += 0x1000) {
mem_map_va((uintptr_t)elfbase + off);
}
return (void *)(start_va + ehdr->e_entry);
}
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