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-rw-r--r--common/cmd_elf.c62
1 files changed, 53 insertions, 9 deletions
diff --git a/common/cmd_elf.c b/common/cmd_elf.c
index 104d6e6..bf32612 100644
--- a/common/cmd_elf.c
+++ b/common/cmd_elf.c
@@ -25,7 +25,8 @@ DECLARE_GLOBAL_DATA_PTR;
#endif
int valid_elf_image (unsigned long addr);
-unsigned long load_elf_image (unsigned long addr);
+static unsigned long load_elf_image_phdr(unsigned long addr);
+static unsigned long load_elf_image_shdr(unsigned long addr);
/* Allow ports to override the default behavior */
__attribute__((weak))
@@ -61,19 +62,34 @@ int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned long addr; /* Address of the ELF image */
unsigned long rc; /* Return value from user code */
+ char *sload, *saddr;
/* -------------------------------------------------- */
int rcode = 0;
- if (argc < 2)
- addr = load_addr;
+ sload = saddr = NULL;
+ if (argc == 3) {
+ sload = argv[1];
+ saddr = argv[2];
+ } else if (argc == 2) {
+ if (argv[1][0] == '-')
+ sload = argv[1];
+ else
+ saddr = argv[1];
+ }
+
+ if (saddr)
+ addr = simple_strtoul(saddr, NULL, 16);
else
- addr = simple_strtoul (argv[1], NULL, 16);
+ addr = load_addr;
if (!valid_elf_image (addr))
return 1;
- addr = load_elf_image (addr);
+ if (sload && sload[1] == 'p')
+ addr = load_elf_image_phdr(addr);
+ else
+ addr = load_elf_image_shdr(addr);
printf ("## Starting application at 0x%08lx ...\n", addr);
@@ -204,7 +220,7 @@ int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
*/
if (valid_elf_image (addr)) {
- addr = load_elf_image (addr);
+ addr = load_elf_image_shdr (addr);
} else {
puts ("## Not an ELF image, assuming binary\n");
/* leave addr as load_addr */
@@ -258,7 +274,33 @@ int valid_elf_image (unsigned long addr)
* A very simple elf loader, assumes the image is valid, returns the
* entry point address.
* ====================================================================== */
-unsigned long load_elf_image (unsigned long addr)
+static 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;
+ phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff);
+
+ /* Load each program header */
+ for (i = 0; i < ehdr->e_phnum; ++i) {
+ void *dst = (void *) 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((unsigned long)dst, phdr->p_filesz);
+ ++phdr;
+ }
+
+ return ehdr->e_entry;
+}
+
+static unsigned long load_elf_image_shdr(unsigned long addr)
{
Elf32_Ehdr *ehdr; /* Elf header structure pointer */
Elf32_Shdr *shdr; /* Section header structure pointer */
@@ -312,9 +354,11 @@ unsigned long load_elf_image (unsigned long addr)
/* ====================================================================== */
U_BOOT_CMD(
- bootelf, 2, 0, do_bootelf,
+ bootelf, 3, 0, do_bootelf,
"Boot from an ELF image in memory",
- " [address] - load address of ELF image."
+ "[-p|-s] [address]\n"
+ "\t- load ELF image at [address] via program headers (-p)\n"
+ "\t or via section headers (-s)"
);
U_BOOT_CMD(