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#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#define _GNU_SOURCE
#include <getopt.h>
#include "elf.h"
#include "elf_boot.h"
#include "convert.h"
#include "mkelfImage.h"
static unsigned char payload[] = {
#include "convert.bin.c"
};
char *linux_ia64_probe(char *kernel_buf, off_t kernel_size)
{
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
int i;
int phdrs;
ehdr = (Elf64_Ehdr *)kernel_buf;
if (
(ehdr->e_ident[EI_MAG0] != ELFMAG0) ||
(ehdr->e_ident[EI_MAG1] != ELFMAG1) ||
(ehdr->e_ident[EI_MAG2] != ELFMAG2) ||
(ehdr->e_ident[EI_MAG3] != ELFMAG3)) {
return "No ELF signature found on kernel\n";
}
if (ehdr->e_ident[EI_CLASS] != ELFCLASS64) {
return "Not a 64bit ELF kernel\n";
}
if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
return "Not a little endian ELF kernel\n";
}
if (le16_to_cpu(ehdr->e_type) != ET_EXEC) {
return "Not an executable kernel\n";
}
if (le16_to_cpu(ehdr->e_machine) != EM_IA_64) {
return "Not an ia64 kernel\n";
}
if ( (ehdr->e_ident[EI_VERSION] != EV_CURRENT) ||
(le32_to_cpu(ehdr->e_version) != EV_CURRENT)) {
return "Kernel not using ELF version 1.\n";
}
if (le16_to_cpu(ehdr->e_phentsize) != sizeof(*phdr)) {
return "Kernel uses bad program header size.\n";
}
phdr = (Elf64_Phdr *)(kernel_buf + le64_to_cpu(ehdr->e_phoff));
phdrs = 0;
for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) {
if (le32_to_cpu(phdr[i].p_type) != PT_LOAD)
continue;
phdrs++;
}
if (phdrs == 0) {
return "No PT_LOAD segments!\n";
}
return 0;
}
struct kernel_info
{
int phdrs;
char *kernel_buf;
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
uint64_t entry;
char *version;
};
static void parse_kernel(struct kernel_info *info,
char *kernel_buf, size_t kernel_size)
{
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
int i;
int phdrs;
ehdr = (Elf64_Ehdr *)kernel_buf;
phdr = (Elf64_Phdr *)(kernel_buf + le64_to_cpu(ehdr->e_phoff));
phdrs = 0;
for(i = 0; i < le16_to_cpu(ehdr->e_phnum); i++) {
if (le32_to_cpu(phdr[i].p_type) != PT_LOAD)
continue;
phdrs++;
}
if (phdrs == 0) {
die("No PT_LOAD segments!\n");
}
info->kernel_buf = kernel_buf;
info->ehdr = ehdr;
info->phdrs = phdrs;
info->phdr = phdr;
info->entry = le64_to_cpu(ehdr->e_entry);
info->version = "unknown";
}
static int populate_kernel_phdrs(struct kernel_info *info, struct memelfphdr *phdr)
{
uint64_t paddr;
int i;
paddr = 0;
for(i = 0; i < info->phdrs; i++) {
Elf64_Phdr *hdr;
int j;
hdr = 0;
for(j = 0; j < le16_to_cpu(info->ehdr->e_phnum); j++) {
if (le16_to_cpu(info->phdr[j].p_type != PT_LOAD)) {
continue;
}
if (paddr > le64_to_cpu(info->phdr[j].p_paddr)) {
continue;
}
if (hdr &&
le64_to_cpu(hdr->p_paddr) <
le64_to_cpu(info->phdr[j].p_paddr)) {
continue;
}
hdr = info->phdr + j;
}
if (!hdr) {
die("Expected %d phdrs found %d!", info->phdrs, i);
}
phdr[i].p_paddr = le64_to_cpu(hdr->p_paddr);
phdr[i].p_vaddr = le64_to_cpu(hdr->p_vaddr);
phdr[i].p_filesz = le64_to_cpu(hdr->p_filesz);
phdr[i].p_memsz = le64_to_cpu(hdr->p_memsz);
phdr[i].p_data = info->kernel_buf + le64_to_cpu(hdr->p_offset);
paddr = phdr[i].p_paddr + phdr[i].p_memsz;
}
return i;
}
void linux_ia64_usage(void)
{
printf(
" --command-line=<string> Set the command line to <string>\n"
" --append=<string> Set the command line to <string>\n"
" --initrd=<filename> Set the initrd to <filename>\n"
" --ramdisk=<filename> Set the initrd to <filename>\n"
);
return;
}
#define OPT_CMDLINE OPT_MAX+0
#define OPT_RAMDISK OPT_MAX+1
int linux_ia64_mkelf(int argc, char **argv,
struct memelfheader *ehdr, char *kernel_buf, off_t kernel_size)
{
const char *ramdisk, *cmdline;
char *payload_buf, *ramdisk_buf;
off_t payload_size, ramdisk_size;
struct memelfphdr *phdr;
struct memelfnote *note;
struct kernel_info kinfo;
struct image_parameters *params;
int index;
int opt;
static const struct option options[] = {
MKELF_OPTIONS
{ "command-line", 1, 0, OPT_CMDLINE },
{ "append", 1, 0, OPT_CMDLINE },
{ "initrd", 1, 0, OPT_RAMDISK },
{ "ramdisk", 1, 0, OPT_RAMDISK },
{ 0 , 0, 0, 0 },
};
static const char short_options[] = "HV";
ramdisk = 0;
cmdline="";
while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch(opt) {
case '?':
error("Unknown option %s\n", argv[optind]);
break;
case OPT_RAMDISK:
ramdisk = optarg;
break;
case OPT_CMDLINE:
cmdline = optarg;
break;
default:
break;
}
}
ehdr->ei_class = ELFCLASS64;
ehdr->ei_data = ELFDATA2LSB;
ehdr->e_type = ET_EXEC;
ehdr->e_machine = EM_IA_64;
/* locate the payload buffer */
payload_buf = payload;
payload_size = sizeof(payload);
/* slurp the input files */
ramdisk_buf = slurp_file(ramdisk, &ramdisk_size);
/* parse the kernel */
parse_kernel(&kinfo, kernel_buf, kernel_size);
/* Find the parameters */
params = (void *)(payload_buf + (payload_size - sizeof(*params)));
/* A sanity check against bad versions of binutils */
if (params->convert_magic != CONVERT_MAGIC) {
die("Internal error convert_magic %16llx != %16llx\n",
(unsigned long long)(params->convert_magic), CONVERT_MAGIC);
}
/* Copy the command line */
strncpy(params->cmdline, cmdline, sizeof(params->cmdline));
params->cmdline[sizeof(params->cmdline)-1]= '\0';
/* Add a program header for the note section */
phdr = add_program_headers(ehdr, 2 + kinfo.phdrs + (ramdisk_size?1:0));
/* Fill in the program headers*/
phdr[0].p_type = PT_NOTE;
/* Fill in the kernel program headers */
index = 1 + populate_kernel_phdrs(&kinfo, phdr + 1);
/* Fill in the converter program header */
phdr[index].p_paddr = roundup(phdr[index -1].p_paddr + phdr[index -1].p_memsz, 16);
phdr[index].p_vaddr = phdr[index].p_paddr;
phdr[index].p_filesz = payload_size;
phdr[index].p_memsz = payload_size;
phdr[index].p_data = payload_buf;
index++;
/* Set the start location */
params->entry = kinfo.entry;
ehdr->e_entry = phdr[index -1].p_paddr;
/* Fill in the ramdisk program header */
params->initrd_start = params->initrd_size = 0;
if (ramdisk_size) {
phdr[index].p_paddr = roundup(phdr[index -1].p_paddr + phdr[index -1].p_memsz, 16);
phdr[index].p_vaddr = phdr[index].p_paddr;
phdr[index].p_filesz = ramdisk_size;
phdr[index].p_memsz = ramdisk_size;
phdr[index].p_data = ramdisk_buf;
params->initrd_start = phdr[index].p_paddr;
params->initrd_size = phdr[index].p_filesz;
index++;
}
/* Compute the elf notes */
note = add_notes(ehdr, 3);
note[0].n_type = EIN_PROGRAM_NAME;
note[0].n_name = "ELFBoot";
note[0].n_desc = "Linux";
note[0].n_descsz = strlen(note[0].n_desc)+1;
note[1].n_type = EIN_PROGRAM_VERSION;
note[1].n_name = "ELFBoot";
note[1].n_desc = kinfo.version;
note[1].n_descsz = strlen(note[1].n_desc)+1;
note[2].n_type = EIN_PROGRAM_CHECKSUM;
note[2].n_name = "ELFBoot";
note[2].n_desc = 0;
note[2].n_descsz = 2;
return 0;
}
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