mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-30 19:48:19 +00:00
805b3cac1e
Move the generic elf loading/validating functions to lib/ so that they can be re-used and accessed by code existing outside cmd. While at it remove the duplicate static version of load_elf_image_phdr under arch/arm/mach-imx/imx_bootaux.c. Signed-off-by: Keerthy <j-keerthy@ti.com> Suggested-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
247 lines
6.8 KiB
C
247 lines
6.8 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
|
|
/*
|
|
Copyright (c) 2001 William L. Pitts
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <cpu_func.h>
|
|
#include <elf.h>
|
|
#include <env.h>
|
|
#include <net.h>
|
|
#include <vxworks.h>
|
|
#ifdef CONFIG_X86
|
|
#include <vbe.h>
|
|
#include <asm/e820.h>
|
|
#include <linux/linkage.h>
|
|
#endif
|
|
|
|
/*
|
|
* A very simple ELF64 loader, assumes the image is valid, returns the
|
|
* entry point address.
|
|
*
|
|
* Note if U-Boot is 32-bit, the loader assumes the to segment's
|
|
* physical address and size is within the lower 32-bit address space.
|
|
*/
|
|
unsigned long load_elf64_image_phdr(unsigned long addr)
|
|
{
|
|
Elf64_Ehdr *ehdr; /* Elf header structure pointer */
|
|
Elf64_Phdr *phdr; /* Program header structure pointer */
|
|
int i;
|
|
|
|
ehdr = (Elf64_Ehdr *)addr;
|
|
phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff);
|
|
|
|
/* Load each program header */
|
|
for (i = 0; i < ehdr->e_phnum; ++i) {
|
|
void *dst = (void *)(ulong)phdr->p_paddr;
|
|
void *src = (void *)addr + phdr->p_offset;
|
|
|
|
debug("Loading phdr %i to 0x%p (%lu bytes)\n",
|
|
i, dst, (ulong)phdr->p_filesz);
|
|
if (phdr->p_filesz)
|
|
memcpy(dst, src, phdr->p_filesz);
|
|
if (phdr->p_filesz != phdr->p_memsz)
|
|
memset(dst + phdr->p_filesz, 0x00,
|
|
phdr->p_memsz - phdr->p_filesz);
|
|
flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
|
|
roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
|
|
++phdr;
|
|
}
|
|
|
|
if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
|
|
EF_PPC64_ELFV1_ABI)) {
|
|
/*
|
|
* For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
|
|
* descriptor pointer with the first double word being the
|
|
* address of the entry point of the function.
|
|
*/
|
|
uintptr_t addr = ehdr->e_entry;
|
|
|
|
return *(Elf64_Addr *)addr;
|
|
}
|
|
|
|
return ehdr->e_entry;
|
|
}
|
|
|
|
unsigned long load_elf64_image_shdr(unsigned long addr)
|
|
{
|
|
Elf64_Ehdr *ehdr; /* Elf header structure pointer */
|
|
Elf64_Shdr *shdr; /* Section header structure pointer */
|
|
unsigned char *strtab = 0; /* String table pointer */
|
|
unsigned char *image; /* Binary image pointer */
|
|
int i; /* Loop counter */
|
|
|
|
ehdr = (Elf64_Ehdr *)addr;
|
|
|
|
/* Find the section header string table for output info */
|
|
shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
|
|
(ehdr->e_shstrndx * sizeof(Elf64_Shdr)));
|
|
|
|
if (shdr->sh_type == SHT_STRTAB)
|
|
strtab = (unsigned char *)(addr + (ulong)shdr->sh_offset);
|
|
|
|
/* Load each appropriate section */
|
|
for (i = 0; i < ehdr->e_shnum; ++i) {
|
|
shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
|
|
(i * sizeof(Elf64_Shdr)));
|
|
|
|
if (!(shdr->sh_flags & SHF_ALLOC) ||
|
|
shdr->sh_addr == 0 || shdr->sh_size == 0) {
|
|
continue;
|
|
}
|
|
|
|
if (strtab) {
|
|
debug("%sing %s @ 0x%08lx (%ld bytes)\n",
|
|
(shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
|
|
&strtab[shdr->sh_name],
|
|
(unsigned long)shdr->sh_addr,
|
|
(long)shdr->sh_size);
|
|
}
|
|
|
|
if (shdr->sh_type == SHT_NOBITS) {
|
|
memset((void *)(uintptr_t)shdr->sh_addr, 0,
|
|
shdr->sh_size);
|
|
} else {
|
|
image = (unsigned char *)addr + (ulong)shdr->sh_offset;
|
|
memcpy((void *)(uintptr_t)shdr->sh_addr,
|
|
(const void *)image, shdr->sh_size);
|
|
}
|
|
flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
|
|
roundup((shdr->sh_addr + shdr->sh_size),
|
|
ARCH_DMA_MINALIGN) -
|
|
rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
|
|
}
|
|
|
|
if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
|
|
EF_PPC64_ELFV1_ABI)) {
|
|
/*
|
|
* For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
|
|
* descriptor pointer with the first double word being the
|
|
* address of the entry point of the function.
|
|
*/
|
|
uintptr_t addr = ehdr->e_entry;
|
|
|
|
return *(Elf64_Addr *)addr;
|
|
}
|
|
|
|
return ehdr->e_entry;
|
|
}
|
|
|
|
/*
|
|
* A very simple ELF loader, assumes the image is valid, returns the
|
|
* entry point address.
|
|
*
|
|
* The loader firstly reads the EFI class to see if it's a 64-bit image.
|
|
* If yes, call the ELF64 loader. Otherwise continue with the ELF32 loader.
|
|
*/
|
|
unsigned long load_elf_image_phdr(unsigned long addr)
|
|
{
|
|
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
|
|
Elf32_Phdr *phdr; /* Program header structure pointer */
|
|
int i;
|
|
|
|
ehdr = (Elf32_Ehdr *)addr;
|
|
if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
|
|
return load_elf64_image_phdr(addr);
|
|
|
|
phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
|
|
|
|
/* Load each program header */
|
|
for (i = 0; i < ehdr->e_phnum; ++i) {
|
|
void *dst = (void *)(uintptr_t)phdr->p_paddr;
|
|
void *src = (void *)addr + phdr->p_offset;
|
|
|
|
debug("Loading phdr %i to 0x%p (%i bytes)\n",
|
|
i, dst, phdr->p_filesz);
|
|
if (phdr->p_filesz)
|
|
memcpy(dst, src, phdr->p_filesz);
|
|
if (phdr->p_filesz != phdr->p_memsz)
|
|
memset(dst + phdr->p_filesz, 0x00,
|
|
phdr->p_memsz - phdr->p_filesz);
|
|
flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
|
|
roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
|
|
++phdr;
|
|
}
|
|
|
|
return ehdr->e_entry;
|
|
}
|
|
|
|
unsigned long load_elf_image_shdr(unsigned long addr)
|
|
{
|
|
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
|
|
Elf32_Shdr *shdr; /* Section header structure pointer */
|
|
unsigned char *strtab = 0; /* String table pointer */
|
|
unsigned char *image; /* Binary image pointer */
|
|
int i; /* Loop counter */
|
|
|
|
ehdr = (Elf32_Ehdr *)addr;
|
|
if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
|
|
return load_elf64_image_shdr(addr);
|
|
|
|
/* Find the section header string table for output info */
|
|
shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
|
|
(ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
|
|
|
|
if (shdr->sh_type == SHT_STRTAB)
|
|
strtab = (unsigned char *)(addr + shdr->sh_offset);
|
|
|
|
/* Load each appropriate section */
|
|
for (i = 0; i < ehdr->e_shnum; ++i) {
|
|
shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
|
|
(i * sizeof(Elf32_Shdr)));
|
|
|
|
if (!(shdr->sh_flags & SHF_ALLOC) ||
|
|
shdr->sh_addr == 0 || shdr->sh_size == 0) {
|
|
continue;
|
|
}
|
|
|
|
if (strtab) {
|
|
debug("%sing %s @ 0x%08lx (%ld bytes)\n",
|
|
(shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
|
|
&strtab[shdr->sh_name],
|
|
(unsigned long)shdr->sh_addr,
|
|
(long)shdr->sh_size);
|
|
}
|
|
|
|
if (shdr->sh_type == SHT_NOBITS) {
|
|
memset((void *)(uintptr_t)shdr->sh_addr, 0,
|
|
shdr->sh_size);
|
|
} else {
|
|
image = (unsigned char *)addr + shdr->sh_offset;
|
|
memcpy((void *)(uintptr_t)shdr->sh_addr,
|
|
(const void *)image, shdr->sh_size);
|
|
}
|
|
flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
|
|
roundup((shdr->sh_addr + shdr->sh_size),
|
|
ARCH_DMA_MINALIGN) -
|
|
rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
|
|
}
|
|
|
|
return ehdr->e_entry;
|
|
}
|
|
|
|
/*
|
|
* Determine if a valid ELF image exists at the given memory location.
|
|
* First look at the ELF header magic field, then make sure that it is
|
|
* executable.
|
|
*/
|
|
int valid_elf_image(unsigned long addr)
|
|
{
|
|
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
|
|
|
|
ehdr = (Elf32_Ehdr *)addr;
|
|
|
|
if (!IS_ELF(*ehdr)) {
|
|
printf("## No elf image at address 0x%08lx\n", addr);
|
|
return 0;
|
|
}
|
|
|
|
if (ehdr->e_type != ET_EXEC) {
|
|
printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|