minix/usr.bin/mkimage/mkimage.c

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/*
* Update physical addresses of boot services
*/
#include <sys/param.h>
#include <err.h>
#include <fcntl.h>
#include <gelf.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <unistd.h>
#include <getopt.h>
#define BOOTPROG_LOAD_START 0x05000000ULL
int nflag = 0;
int stack_kbytes[] = {
/* ds rs pm sched vfs memory log tty mfs vm pfs init */
16, 8125, 32, 32, 16, 8, 32, 16, 128, 128, 128, 64
};
static void usage(void);
GElf_Addr
update_paddr(int nr, char *fname, GElf_Addr startaddr)
{
int i, fd;
Elf *e;
size_t n;
GElf_Phdr phdr;
GElf_Addr endaddr = 0;
if ((fd = open(fname, O_RDWR, 0)) < 0)
err(EX_NOINPUT, "open \"%s\" failed", fname);
if ((e = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL)
errx(EX_SOFTWARE, "elf_begin() failed: %s.", elf_errmsg(-1));
if (elf_kind(e) != ELF_K_ELF)
errx(EX_DATAERR, "\"%s\" is not an ELF object.", fname);
if (elf_getphdrnum(e, &n) != 0)
errx(EX_DATAERR, "elf_getphdrnum() failed: %s.", elf_errmsg(-1));
for (i = 0; i < n; i++) {
if (gelf_getphdr(e, i, &phdr) != &phdr)
errx(EX_SOFTWARE, "getphdr() failed: %s.",
elf_errmsg(-1));
if (phdr.p_type == PT_LOAD) {
phdr.p_paddr = startaddr + phdr.p_vaddr;
endaddr = round_page(phdr.p_paddr + phdr.p_memsz)
+ round_page(stack_kbytes[nr] * 1024);
if (gelf_update_phdr(e, i, &phdr) < 0)
errx(EX_SOFTWARE,
"gelf_update_phdr failed: %s.",
elf_errmsg(-1));
}
}
if (elf_update(e, ELF_C_WRITE) < 0)
errx(EX_SOFTWARE, "elf_update failed: %s.", elf_errmsg(-1));
(void) elf_end(e);
(void) close(fd);
return endaddr;
}
int
main(int argc, char **argv)
{
int i, ch;
GElf_Addr startaddr;
startaddr = BOOTPROG_LOAD_START;
while ((ch = getopt(argc, argv, "n")) != -1) {
switch (ch) {
case 'n':
nflag = 1;
break;
case '?':
default:
usage();
exit(EX_USAGE);
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
if (elf_version(EV_CURRENT) == EV_NONE)
errx(EX_SOFTWARE, "ELF library intialization failed: %s",
elf_errmsg(-1));
startaddr = BOOTPROG_LOAD_START;
for (i = 0; i < argc; i++) {
startaddr = update_paddr(i, argv[i], startaddr);
}
exit(EX_OK);
}
static void
usage(void)
{
(void) fprintf(stderr, "usage: %s [-n] elf1 elf2...\n", getprogname());
}