diff options
Diffstat (limited to 'common/cmd_elf.c')
| -rw-r--r-- | common/cmd_elf.c | 62 |
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( |