127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*-
|
|
* Copyright (c) 1998 Michael Smith <msmith@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/exec.h>
|
|
#include <sys/linker.h>
|
|
#include <string.h>
|
|
#include <machine/bootinfo.h>
|
|
#include <machine/elf.h>
|
|
#include <stand.h>
|
|
|
|
#include "bootstrap.h"
|
|
#include "libi386.h"
|
|
#include "btxv86.h"
|
|
|
|
static int elf64_exec(struct preloaded_file *amp);
|
|
static int elf64_obj_exec(struct preloaded_file *amp);
|
|
|
|
struct file_format amd64_elf = { elf64_loadfile, elf64_exec };
|
|
struct file_format amd64_elf_obj = { elf64_obj_loadfile, elf64_obj_exec };
|
|
|
|
#define PG_V 0x001
|
|
#define PG_RW 0x002
|
|
#define PG_U 0x004
|
|
#define PG_PS 0x080
|
|
|
|
typedef u_int64_t p4_entry_t;
|
|
typedef u_int64_t p3_entry_t;
|
|
typedef u_int64_t p2_entry_t;
|
|
extern p4_entry_t PT4[];
|
|
extern p3_entry_t PT3[];
|
|
extern p2_entry_t PT2[];
|
|
|
|
u_int32_t entry_hi;
|
|
u_int32_t entry_lo;
|
|
|
|
extern void amd64_tramp();
|
|
|
|
/*
|
|
* There is an ELF kernel and one or more ELF modules loaded.
|
|
* We wish to start executing the kernel image, so make such
|
|
* preparations as are required, and do so.
|
|
*/
|
|
static int
|
|
elf64_exec(struct preloaded_file *fp)
|
|
{
|
|
struct file_metadata *md;
|
|
Elf_Ehdr *ehdr;
|
|
vm_offset_t modulep, kernend;
|
|
int err;
|
|
int i;
|
|
|
|
if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
|
|
return(EFTYPE);
|
|
ehdr = (Elf_Ehdr *)&(md->md_data);
|
|
|
|
err = bi_load64(fp->f_args, &modulep, &kernend);
|
|
if (err != 0)
|
|
return(err);
|
|
|
|
bzero(PT4, PAGE_SIZE);
|
|
bzero(PT3, PAGE_SIZE);
|
|
bzero(PT2, PAGE_SIZE);
|
|
|
|
/*
|
|
* This is kinda brutal, but every single 1GB VM memory segment points to
|
|
* the same first 1GB of physical memory. But it is more than adequate.
|
|
*/
|
|
for (i = 0; i < 512; i++) {
|
|
/* Each slot of the level 4 pages points to the same level 3 page */
|
|
PT4[i] = (p4_entry_t)VTOP((uintptr_t)&PT3[0]);
|
|
PT4[i] |= PG_V | PG_RW | PG_U;
|
|
|
|
/* Each slot of the level 3 pages points to the same level 2 page */
|
|
PT3[i] = (p3_entry_t)VTOP((uintptr_t)&PT2[0]);
|
|
PT3[i] |= PG_V | PG_RW | PG_U;
|
|
|
|
/* The level 2 page slots are mapped with 2MB pages for 1GB. */
|
|
PT2[i] = i * (2 * 1024 * 1024);
|
|
PT2[i] |= PG_V | PG_RW | PG_PS | PG_U;
|
|
}
|
|
|
|
entry_lo = ehdr->e_entry & 0xffffffff;
|
|
entry_hi = (ehdr->e_entry >> 32) & 0xffffffff;
|
|
#ifdef DEBUG
|
|
printf("Start @ %#llx ...\n", ehdr->e_entry);
|
|
#endif
|
|
|
|
dev_cleanup();
|
|
__exec((void *)VTOP(amd64_tramp), modulep, kernend);
|
|
|
|
panic("exec returned");
|
|
}
|
|
|
|
static int
|
|
elf64_obj_exec(struct preloaded_file *fp)
|
|
{
|
|
return (EFTYPE);
|
|
}
|