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/* $OpenBSD: exec_i386.c,v 1.28 2019/04/20 23:00:07 deraadt Exp $ */
/*
* Copyright (c) 1997-1998 Michael Shalayeff
* Copyright (c) 1997 Tobias Weingartner
* 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 AUTHORS ``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 REGENTS 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/param.h>
#include <sys/disklabel.h>
#include <dev/cons.h>
#include <lib/libsa/loadfile.h>
#include <machine/biosvar.h>
#include <machine/specialreg.h>
#include <stand/boot/bootarg.h>
#include "cmd.h"
#include "disk.h"
#include "libsa.h"
#ifdef SOFTRAID
#include <dev/softraidvar.h>
#include <lib/libsa/softraid.h>
#include "softraid_amd64.h"
#endif
#ifdef EFIBOOT
#include "efiboot.h"
#endif
typedef void (*startfuncp)(int, int, int, int, int, int, int, int)
__attribute__ ((noreturn));
void ucode_load(void);
extern struct cmd_state cmd;
char *bootmac = NULL;
void
run_loadfile(uint64_t *marks, int howto)
{
u_long entry;
#ifdef EXEC_DEBUG
extern int debug;
#endif
dev_t bootdev = bootdev_dip->bootdev;
size_t ac = BOOTARG_LEN;
caddr_t av = (caddr_t)BOOTARG_OFF;
bios_consdev_t cd;
extern int com_speed; /* from bioscons.c */
extern int com_addr;
bios_ddb_t ddb;
extern int db_console;
bios_bootduid_t bootduid;
#ifdef SOFTRAID
bios_bootsr_t bootsr;
struct sr_boot_volume *bv;
#endif
#ifdef EFIBOOT
int i;
u_long delta;
extern u_long efi_loadaddr;
if ((av = alloc(ac)) == NULL)
panic("alloc for bootarg");
efi_makebootargs();
delta = DEFAULT_KERNEL_ADDRESS - efi_loadaddr;
#endif
if (sa_cleanup != NULL)
(*sa_cleanup)();
cd.consdev = cn_tab->cn_dev;
cd.conspeed = com_speed;
cd.consaddr = com_addr;
cd.consfreq = 0;
addbootarg(BOOTARG_CONSDEV, sizeof(cd), &cd);
if (bootmac != NULL)
addbootarg(BOOTARG_BOOTMAC, sizeof(bios_bootmac_t), bootmac);
if (db_console != -1) {
ddb.db_console = db_console;
addbootarg(BOOTARG_DDB, sizeof(ddb), &ddb);
}
bcopy(bootdev_dip->disklabel.d_uid, &bootduid.duid, sizeof(bootduid));
addbootarg(BOOTARG_BOOTDUID, sizeof(bootduid), &bootduid);
ucode_load();
#ifdef SOFTRAID
if (bootdev_dip->sr_vol != NULL) {
bv = bootdev_dip->sr_vol;
bzero(&bootsr, sizeof(bootsr));
bcopy(&bv->sbv_uuid, &bootsr.uuid, sizeof(bootsr.uuid));
if (bv->sbv_maskkey != NULL)
bcopy(bv->sbv_maskkey, &bootsr.maskkey,
sizeof(bootsr.maskkey));
addbootarg(BOOTARG_BOOTSR, sizeof(bios_bootsr_t), &bootsr);
explicit_bzero(&bootsr, sizeof(bootsr));
}
sr_clear_keys();
#endif
entry = marks[MARK_ENTRY] & 0x0fffffff;
#ifdef EFIBOOT
entry += delta;
#endif
printf("entry point at 0x%lx\n", entry);
#ifdef EFIBOOT
/* Sync the memory map and call ExitBootServices() */
efi_cleanup();
#endif
/* Pass memory map to the kernel */
mem_pass();
/*
* This code may be used both for 64bit and 32bit. Make sure the
* bootarg is always 32bit, even on amd64.
*/
#ifdef __amd64__
makebootargs32(av, &ac);
#else
makebootargs(av, &ac);
#endif
#ifdef EFIBOOT
/*
* Move the loaded kernel image to the usual place after calling
* ExitBootServices().
*/
memmove((void *)marks[MARK_START] + delta, (void *)marks[MARK_START],
marks[MARK_END] - marks[MARK_START]);
for (i = 0; i < MARK_MAX; i++)
marks[i] += delta;
#endif
#ifdef __amd64__
(*run_i386)((u_long)run_i386, entry, howto, bootdev, BOOTARG_APIVER,
marks[MARK_END], extmem, cnvmem, ac, (intptr_t)av);
#else
/* stack and the gung is ok at this point, so, no need for asm setup */
(*(startfuncp)entry)(howto, bootdev, BOOTARG_APIVER, marks[MARK_END],
extmem, cnvmem, ac, (int)av);
#endif
/* not reached */
}
void
ucode_load(void)
{
uint32_t model, family, stepping;
uint32_t dummy, signature;
uint32_t vendor[4];
bios_ucode_t uc;
struct stat sb;
char path[128];
size_t buflen;
char *buf;
int fd;
CPUID(0, dummy, vendor[0], vendor[2], vendor[1]);
vendor[3] = 0; /* NULL-terminate */
if (strcmp((char *)vendor, "GenuineIntel") != 0)
return;
CPUID(1, signature, dummy, dummy, dummy);
family = (signature >> 8) & 0x0f;
model = (signature >> 4) & 0x0f;
if (family == 0x6 || family == 0xf) {
family += (signature >> 20) & 0xff;
model += ((signature >> 16) & 0x0f) << 4;
}
stepping = (signature >> 0) & 0x0f;
snprintf(path, sizeof(path), "%s:/etc/firmware/intel/%02x-%02x-%02x",
cmd.bootdev, family, model, stepping);
fd = open(path, 0);
if (fd == -1)
return;
if (fstat(fd, &sb) == -1)
return;
buflen = sb.st_size;
if (buflen > 128*1024) {
printf("ucode too large\n");
return;
}
buf = (char *)(1*1024*1024);
if (read(fd, buf, buflen) != buflen) {
close(fd);
return;
}
uc.uc_addr = (uint64_t)buf;
uc.uc_size = (uint64_t)buflen;
addbootarg(BOOTARG_UCODE, sizeof(uc), &uc);
close(fd);
}
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