freebsd-dev/sys/boot/powerpc/kboot/ppc64_elf_freebsd.c
2015-12-01 17:01:27 +00:00

125 lines
3.5 KiB
C

/*-
* Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define __ELF_WORD_SIZE 64
#include <sys/param.h>
#include <sys/linker.h>
#include <machine/metadata.h>
#include <machine/elf.h>
#include <stand.h>
#include "bootstrap.h"
#include "host_syscall.h"
extern char end[];
extern void *kerneltramp;
extern size_t szkerneltramp;
extern int nkexec_segments;
extern void * loaded_segments;
int
ppc64_elf_loadfile(char *filename, u_int64_t dest,
struct preloaded_file **result)
{
int r;
r = __elfN(loadfile)(filename, dest, result);
if (r != 0)
return (r);
return (0);
}
int
ppc64_elf_exec(struct preloaded_file *fp)
{
struct file_metadata *fmp;
vm_offset_t mdp, dtb;
Elf_Ehdr *e;
int error;
uint32_t *trampoline;
uint64_t entry;
vm_offset_t trampolinebase;
if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
return(EFTYPE);
}
e = (Elf_Ehdr *)&fmp->md_data;
/* Figure out where to put it */
trampolinebase = archsw.arch_loadaddr(LOAD_RAW, NULL, 0);
/* Set up loader trampoline */
trampoline = malloc(szkerneltramp);
memcpy(trampoline, &kerneltramp, szkerneltramp);
/* Parse function descriptor for ELFv1 kernels */
if ((e->e_flags & 3) == 2)
entry = e->e_entry;
else
archsw.arch_copyout(e->e_entry + elf64_relocation_offset,
&entry, 8);
trampoline[2] = entry + elf64_relocation_offset;
trampoline[4] = 0; /* Phys. mem offset */
trampoline[5] = 0; /* OF entry point */
if ((error = md_load64(fp->f_args, &mdp, &dtb)) != 0)
return (error);
trampoline[3] = dtb;
trampoline[6] = mdp;
trampoline[7] = sizeof(mdp);
printf("Kernel entry at %#jx (%#x) ...\n", e->e_entry, trampoline[2]);
printf("DTB at %#x, mdp at %#x\n", dtb, mdp);
dev_cleanup();
archsw.arch_copyin(trampoline, trampolinebase, szkerneltramp);
free(trampoline);
error = kexec_load(trampolinebase, nkexec_segments, &loaded_segments);
if (error != 0)
panic("kexec_load returned error: %d", error);
error = host_reboot(0xfee1dead, 672274793,
0x45584543 /* LINUX_REBOOT_CMD_KEXEC */, NULL);
if (error != 0)
panic("reboot returned error: %d", error);
while (1) {}
panic("exec returned");
}
struct file_format ppc_elf64 =
{
ppc64_elf_loadfile,
ppc64_elf_exec
};