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-rw-r--r--cmd/elf.c410
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diff --git a/cmd/elf.c b/cmd/elf.c
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+/*
+ * Copyright (c) 2001 William L. Pitts
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are freely
+ * permitted provided that the above copyright notice and this
+ * paragraph and the following disclaimer are duplicated in all
+ * such forms.
+ *
+ * This software is provided "AS IS" and without any express or
+ * implied warranties, including, without limitation, the implied
+ * warranties of merchantability and fitness for a particular
+ * purpose.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <elf.h>
+#include <net.h>
+#include <vxworks.h>
+#ifdef CONFIG_X86
+#include <asm/e820.h>
+#include <linux/linkage.h>
+#endif
+
+/*
+ * A very simple elf loader, assumes the image is valid, returns the
+ * entry point address.
+ */
+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 *)(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((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 */
+ unsigned char *strtab = 0; /* String table pointer */
+ unsigned char *image; /* Binary image pointer */
+ int i; /* Loop counter */
+
+ ehdr = (Elf32_Ehdr *)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(shdr->sh_addr, shdr->sh_size);
+ }
+
+ return ehdr->e_entry;
+}
+
+/* Allow ports to override the default behavior */
+static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
+ int argc, char * const argv[])
+{
+ unsigned long ret;
+
+ /*
+ * QNX images require the data cache is disabled.
+ * Data cache is already flushed, so just turn it off.
+ */
+ int dcache = dcache_status();
+ if (dcache)
+ dcache_disable();
+
+ /*
+ * pass address parameter as argv[0] (aka command name),
+ * and all remaining args
+ */
+ ret = entry(argc, argv);
+
+ if (dcache)
+ dcache_enable();
+
+ return ret;
+}
+
+/*
+ * 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;
+}
+
+/* Interpreter command to boot an arbitrary ELF image from memory */
+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;
+ const char *ep = getenv("autostart");
+
+ int rcode = 0;
+
+ 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 = load_addr;
+
+ if (!valid_elf_image(addr))
+ return 1;
+
+ if (sload && sload[1] == 'p')
+ addr = load_elf_image_phdr(addr);
+ else
+ addr = load_elf_image_shdr(addr);
+
+ if (ep && !strcmp(ep, "no"))
+ return rcode;
+
+ printf("## Starting application at 0x%08lx ...\n", addr);
+
+ /*
+ * pass address parameter as argv[0] (aka command name),
+ * and all remaining args
+ */
+ rc = do_bootelf_exec((void *)addr, argc - 1, argv + 1);
+ if (rc != 0)
+ rcode = 1;
+
+ printf("## Application terminated, rc = 0x%lx\n", rc);
+
+ return rcode;
+}
+
+/*
+ * Interpreter command to boot VxWorks from a memory image. The image can
+ * be either an ELF image or a raw binary. Will attempt to setup the
+ * bootline and other parameters correctly.
+ */
+int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ unsigned long addr; /* Address of image */
+ unsigned long bootaddr; /* Address to put the bootline */
+ char *bootline; /* Text of the bootline */
+ char *tmp; /* Temporary char pointer */
+ char build_buf[128]; /* Buffer for building the bootline */
+ int ptr = 0;
+#ifdef CONFIG_X86
+ struct e820info *info;
+ struct e820entry *data;
+#endif
+
+ /*
+ * Check the loadaddr variable.
+ * If we don't know where the image is then we're done.
+ */
+ if (argc < 2)
+ addr = load_addr;
+ else
+ addr = simple_strtoul(argv[1], NULL, 16);
+
+#if defined(CONFIG_CMD_NET)
+ /*
+ * Check to see if we need to tftp the image ourselves
+ * before starting
+ */
+ if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
+ if (net_loop(TFTPGET) <= 0)
+ return 1;
+ printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
+ addr);
+ }
+#endif
+
+ /*
+ * This should equate to
+ * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
+ * from the VxWorks BSP header files.
+ * This will vary from board to board
+ */
+#if defined(CONFIG_WALNUT)
+ tmp = (char *)CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
+ eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
+ memcpy(tmp, &build_buf[3], 3);
+#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
+ tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
+ eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
+ memcpy(tmp, build_buf, 6);
+#else
+ puts("## Ethernet MAC address not copied to NV RAM\n");
+#endif
+
+ /*
+ * Use bootaddr to find the location in memory that VxWorks
+ * will look for the bootline string. The default value is
+ * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
+ * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
+ */
+ tmp = getenv("bootaddr");
+ if (!tmp) {
+ printf("## VxWorks bootline address not specified\n");
+ } else {
+ bootaddr = simple_strtoul(tmp, NULL, 16);
+
+ /*
+ * Check to see if the bootline is defined in the 'bootargs'
+ * parameter. If it is not defined, we may be able to
+ * construct the info.
+ */
+ bootline = getenv("bootargs");
+ if (bootline) {
+ memcpy((void *)bootaddr, bootline,
+ max(strlen(bootline), (size_t)255));
+ flush_cache(bootaddr, max(strlen(bootline),
+ (size_t)255));
+ } else {
+ tmp = getenv("bootdev");
+ if (tmp) {
+ strcpy(build_buf, tmp);
+ ptr = strlen(tmp);
+ } else
+ printf("## VxWorks boot device not specified\n");
+
+ tmp = getenv("bootfile");
+ if (tmp)
+ ptr += sprintf(build_buf + ptr,
+ "host:%s ", tmp);
+ else
+ ptr += sprintf(build_buf + ptr,
+ "host:vxWorks ");
+
+ /*
+ * The following parameters are only needed if 'bootdev'
+ * is an ethernet device, otherwise they are optional.
+ */
+ tmp = getenv("ipaddr");
+ if (tmp) {
+ ptr += sprintf(build_buf + ptr, "e=%s", tmp);
+ tmp = getenv("netmask");
+ if (tmp) {
+ u32 mask = getenv_ip("netmask").s_addr;
+ ptr += sprintf(build_buf + ptr,
+ ":%08x ", ntohl(mask));
+ } else {
+ ptr += sprintf(build_buf + ptr, " ");
+ }
+ }
+
+ tmp = getenv("serverip");
+ if (tmp)
+ ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
+
+ tmp = getenv("gatewayip");
+ if (tmp)
+ ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
+
+ tmp = getenv("hostname");
+ if (tmp)
+ ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
+
+ tmp = getenv("othbootargs");
+ if (tmp) {
+ strcpy(build_buf + ptr, tmp);
+ ptr += strlen(tmp);
+ }
+
+ memcpy((void *)bootaddr, build_buf,
+ max(strlen(build_buf), (size_t)255));
+ flush_cache(bootaddr, max(strlen(build_buf),
+ (size_t)255));
+ }
+
+ printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
+ (char *)bootaddr);
+ }
+
+#ifdef CONFIG_X86
+ /*
+ * Since E820 information is critical to the kernel, if we don't
+ * specify these in the environments, use a default one.
+ */
+ tmp = getenv("e820data");
+ if (tmp)
+ data = (struct e820entry *)simple_strtoul(tmp, NULL, 16);
+ else
+ data = (struct e820entry *)VXWORKS_E820_DATA_ADDR;
+ tmp = getenv("e820info");
+ if (tmp)
+ info = (struct e820info *)simple_strtoul(tmp, NULL, 16);
+ else
+ info = (struct e820info *)VXWORKS_E820_INFO_ADDR;
+
+ memset(info, 0, sizeof(struct e820info));
+ info->sign = E820_SIGNATURE;
+ info->entries = install_e820_map(E820MAX, data);
+ info->addr = (info->entries - 1) * sizeof(struct e820entry) +
+ VXWORKS_E820_DATA_ADDR;
+#endif
+
+ /*
+ * If the data at the load address is an elf image, then
+ * treat it like an elf image. Otherwise, assume that it is a
+ * binary image.
+ */
+ if (valid_elf_image(addr))
+ addr = load_elf_image_shdr(addr);
+ else
+ puts("## Not an ELF image, assuming binary\n");
+
+ printf("## Starting vxWorks at 0x%08lx ...\n", addr);
+
+ dcache_disable();
+#ifdef CONFIG_X86
+ /* VxWorks on x86 uses stack to pass parameters */
+ ((asmlinkage void (*)(int))addr)(0);
+#else
+ ((void (*)(int))addr)(0);
+#endif
+
+ puts("## vxWorks terminated\n");
+
+ return 1;
+}
+
+U_BOOT_CMD(
+ bootelf, 3, 0, do_bootelf,
+ "Boot from an ELF image in memory",
+ "[-p|-s] [address]\n"
+ "\t- load ELF image at [address] via program headers (-p)\n"
+ "\t or via section headers (-s)"
+);
+
+U_BOOT_CMD(
+ bootvx, 2, 0, do_bootvx,
+ "Boot vxWorks from an ELF image",
+ " [address] - load address of vxWorks ELF image."
+);
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