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/* $OpenBSD: exec.c,v 1.3 2006/07/30 21:38:12 drahn Exp $ */
/*
* Copyright (c) 2006 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <lib/libsa/loadfile.h>
#ifdef BOOT_ELF
#include <sys/exec_elf.h>
#endif
#include <sys/reboot.h>
#include <stand/boot/cmd.h>
#include <machine/bootconfig.h>
typedef void (*startfuncp)(void) __attribute__ ((noreturn));
void
run_loadfile(u_long *marks, int howto)
{
#ifdef BOOT_ELF
Elf_Ehdr *elf = (Elf_Ehdr *)marks[MARK_SYM];
Elf_Shdr *shp = (Elf_Shdr *)(marks[MARK_SYM] + elf->e_shoff);
u_long esym = marks[MARK_END];
char *cp;
int i;
/*
* Tell locore.S where the symbol table ends by setting
* 'esym', which should be the first word in the .data
* section.
*/
for (i = 0; i < elf->e_shnum; i++) {
/* XXX Assume .data is the first writable segment. */
if (shp[i].sh_flags & SHF_WRITE) {
/* XXX We have to store the virtual address. */
esym |= shp[i].sh_addr & 0xff000000;
*(u_long *)(shp[i].sh_addr & 0x00ffffff) = esym;
break;
}
}
#endif
cp = (char *)0x00200000 - MAX_BOOT_STRING - 1;
#define BOOT_STRING_MAGIC 0x4f425344
*(int *)cp = BOOT_STRING_MAGIC;
cp += sizeof(int);
snprintf(cp, MAX_BOOT_STRING, "%s:%s -", cmd.bootdev, cmd.image);
while (*cp != '\0')
cp++;
if (howto & RB_ASKNAME)
*cp++ = 'a';
if (howto & RB_CONFIG)
*cp++ = 'c';
if (howto & RB_KDB)
*cp++ = 'd';
if (howto & RB_SINGLE)
*cp++ = 's';
*cp = '\0';
(*(startfuncp)(marks[MARK_ENTRY]))();
/* NOTREACHED */
}
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