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remoteproc: elf-loader: Add 64 bit elf loading support

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The current rproc-elf-loader supports loading of only 32 bit elf files.
Introduce support for loading of 64 bit elf files in rproc-elf-loader.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
This commit is contained in:
Lokesh Vutla 2019-09-04 16:01:29 +05:30 committed by Tom Rini
parent 14d963d1b5
commit e3c4d6f01f
2 changed files with 136 additions and 0 deletions
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110
drivers/remoteproc/rproc-elf-loader.c
View file

@ -64,6 +64,62 @@ int rproc_elf32_sanity_check(ulong addr, ulong size)
return 0;
}
/* Basic function to verify ELF64 image format */
int rproc_elf64_sanity_check(ulong addr, ulong size)
{
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)addr;
char class;
if (!addr) {
pr_debug("Invalid fw address?\n");
return -EFAULT;
}
if (size < sizeof(Elf64_Ehdr)) {
pr_debug("Image is too small\n");
return -ENOSPC;
}
class = ehdr->e_ident[EI_CLASS];
if (!IS_ELF(*ehdr) || ehdr->e_type != ET_EXEC || class != ELFCLASS64) {
pr_debug("Not an executable ELF64 image\n");
return -EPROTONOSUPPORT;
}
/* We assume the firmware has the same endianness as the host */
# ifdef __LITTLE_ENDIAN
if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
# else /* BIG ENDIAN */
if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
# endif
pr_debug("Unsupported firmware endianness\n");
return -EILSEQ;
}
if (size < ehdr->e_shoff + sizeof(Elf64_Shdr)) {
pr_debug("Image is too small\n");
return -ENOSPC;
}
if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
pr_debug("Image is corrupted (bad magic)\n");
return -EBADF;
}
if (ehdr->e_phnum == 0) {
pr_debug("No loadable segments\n");
return -ENOEXEC;
}
if (ehdr->e_phoff > size) {
pr_debug("Firmware size is too small\n");
return -ENOSPC;
}
return 0;
}
int rproc_elf32_load_image(struct udevice *dev, unsigned long addr, ulong size)
{
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
@ -110,3 +166,57 @@ int rproc_elf32_load_image(struct udevice *dev, unsigned long addr, ulong size)
return 0;
}
int rproc_elf64_load_image(struct udevice *dev, ulong addr, ulong size)
{
const struct dm_rproc_ops *ops = rproc_get_ops(dev);
u64 da, memsz, filesz, offset;
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
int i, ret = 0;
void *ptr;
dev_dbg(dev, "%s: addr = 0x%lx size = 0x%lx\n", __func__, addr, size);
if (rproc_elf64_sanity_check(addr, size))
return -EINVAL;
ehdr = (Elf64_Ehdr *)addr;
phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff);
/* go through the available ELF segments */
for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
da = phdr->p_paddr;
memsz = phdr->p_memsz;
filesz = phdr->p_filesz;
offset = phdr->p_offset;
if (phdr->p_type != PT_LOAD)
continue;
dev_dbg(dev, "%s:phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
__func__, phdr->p_type, da, memsz, filesz);
ptr = (void *)(uintptr_t)da;
if (ops->device_to_virt) {
ptr = ops->device_to_virt(dev, da, phdr->p_memsz);
if (!ptr) {
dev_err(dev, "bad da 0x%llx mem 0x%llx\n", da,
memsz);
ret = -EINVAL;
break;
}
}
if (filesz)
memcpy(ptr, (void *)addr + offset, filesz);
if (filesz != memsz)
memset(ptr + filesz, 0x00, memsz - filesz);
flush_cache(rounddown((ulong)ptr, ARCH_DMA_MINALIGN),
roundup((ulong)ptr + filesz, ARCH_DMA_MINALIGN) -
rounddown((ulong)ptr, ARCH_DMA_MINALIGN));
}
return ret;
}

26
include/remoteproc.h
View file

@ -214,6 +214,18 @@ int rproc_is_running(int id);
*/
int rproc_elf32_sanity_check(ulong addr, ulong size);
/**
* rproc_elf64_sanity_check() - Verify if an image is a valid ELF32 one
*
* Check if a valid ELF64 image exists at the given memory location. Verify
* basic ELF64 format requirements like magic number and sections size.
*
* @addr: address of the image to verify
* @size: size of the image
* @return 0 if the image looks good, else appropriate error value.
*/
int rproc_elf64_sanity_check(ulong addr, ulong size);
/**
* rproc_elf32_load_image() - load an ELF32 image
* @dev: device loading the ELF32 image
@ -222,6 +234,15 @@ int rproc_elf32_sanity_check(ulong addr, ulong size);
* @return 0 if the image is successfully loaded, else appropriate error value.
*/
int rproc_elf32_load_image(struct udevice *dev, unsigned long addr, ulong size);
/**
* rproc_elf64_load_image() - load an ELF64 image
* @dev: device loading the ELF64 image
* @addr: valid ELF64 image address
* @size: size of the image
* @return 0 if the image is successfully loaded, else appropriate error value.
*/
int rproc_elf64_load_image(struct udevice *dev, ulong addr, ulong size);
#else
static inline int rproc_init(void) { return -ENOSYS; }
static inline int rproc_dev_init(int id) { return -ENOSYS; }
@ -234,9 +255,14 @@ static inline int rproc_ping(int id) { return -ENOSYS; }
static inline int rproc_is_running(int id) { return -ENOSYS; }
static inline int rproc_elf32_sanity_check(ulong addr,
ulong size) { return -ENOSYS; }
static inline int rproc_elf64_sanity_check(ulong addr,
ulong size) { return -ENOSYS; }
static inline int rproc_elf32_load_image(struct udevice *dev,
unsigned long addr, ulong size)
{ return -ENOSYS; }
static inline int rproc_elf64_load_image(struct udevice *dev, ulong addr,
ulong size)
{ return -ENOSYS; }
#endif
#endif /* _RPROC_H_ */