| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/wi/@/boot/userboot/userboot/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/wi/@/boot/userboot/userboot/bootinfo32.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: release/9.1.0/sys/boot/userboot/userboot/bootinfo32.c 223695 2011-06-30 16:08:56Z dfr $");
#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <i386/include/bootinfo.h>
#include "bootstrap.h"
#include "libuserboot.h"
static struct bootinfo bi;
/*
* Copy module-related data into the load area, where it can be
* used as a directory for loaded modules.
*
* Module data is presented in a self-describing format. Each datum
* is preceded by a 32-bit identifier and a 32-bit size field.
*
* Currently, the following data are saved:
*
* MOD_NAME (variable) module name (string)
* MOD_TYPE (variable) module type (string)
* MOD_ARGS (variable) module parameters (string)
* MOD_ADDR sizeof(vm_offset_t) module load address
* MOD_SIZE sizeof(size_t) module size
* MOD_METADATA (variable) type-specific metadata
*/
#define COPY32(v, a, c) { \
u_int32_t x = (v); \
if (c) \
CALLBACK(copyin, &x, a, sizeof(x)); \
a += sizeof(x); \
}
#define MOD_STR(t, a, s, c) { \
COPY32(t, a, c); \
COPY32(strlen(s) + 1, a, c); \
if (c) \
CALLBACK(copyin, s, a, strlen(s) + 1); \
a += roundup(strlen(s) + 1, sizeof(u_long));\
}
#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
#define MOD_VAR(t, a, s, c) { \
COPY32(t, a, c); \
COPY32(sizeof(s), a, c); \
if (c) \
CALLBACK(copyin, &s, a, sizeof(s)); \
a += roundup(sizeof(s), sizeof(u_long)); \
}
#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
#define MOD_METADATA(a, mm, c) { \
COPY32(MODINFO_METADATA | mm->md_type, a, c); \
COPY32(mm->md_size, a, c); \
if (c) \
CALLBACK(copyin, mm->md_data, a, mm->md_size); \
a += roundup(mm->md_size, sizeof(u_long));\
}
#define MOD_END(a, c) { \
COPY32(MODINFO_END, a, c); \
COPY32(0, a, c); \
}
static vm_offset_t
bi_copymodules32(vm_offset_t addr)
{
struct preloaded_file *fp;
struct file_metadata *md;
int c;
c = addr != 0;
/* start with the first module on the list, should be the kernel */
for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
MOD_NAME(addr, fp->f_name, c); /* this field must come first */
MOD_TYPE(addr, fp->f_type, c);
if (fp->f_args)
MOD_ARGS(addr, fp->f_args, c);
MOD_ADDR(addr, fp->f_addr, c);
MOD_SIZE(addr, fp->f_size, c);
for (md = fp->f_metadata; md != NULL; md = md->md_next)
if (!(md->md_type & MODINFOMD_NOCOPY))
MOD_METADATA(addr, md, c);
}
MOD_END(addr, c);
return(addr);
}
/*
* Load the information expected by an i386 kernel.
*
* - The 'boothowto' argument is constructed
* - The 'bootdev' argument is constructed
* - The 'bootinfo' struct is constructed, and copied into the kernel space.
* - The kernel environment is copied into kernel space.
* - Module metadata are formatted and placed in kernel space.
*/
int
bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
{
struct preloaded_file *xp, *kfp;
struct i386_devdesc *rootdev;
struct file_metadata *md;
vm_offset_t addr;
vm_offset_t kernend;
vm_offset_t envp;
vm_offset_t size;
vm_offset_t ssym, esym;
char *rootdevname;
int bootdevnr, i, howto;
char *kernelname;
const char *kernelpath;
howto = bi_getboothowto(args);
/*
* Allow the environment variable 'rootdev' to override the supplied device
* This should perhaps go to MI code and/or have $rootdev tested/set by
* MI code before launching the kernel.
*/
rootdevname = getenv("rootdev");
userboot_getdev((void **)(&rootdev), rootdevname, NULL);
if (rootdev == NULL) { /* bad $rootdev/$currdev */
printf("can't determine root device\n");
return(EINVAL);
}
/* Try reading the /etc/fstab file to select the root device */
getrootmount(userboot_fmtdev((void *)rootdev));
bootdevnr = 0;
#if 0
if (bootdevnr == -1) {
printf("root device %s invalid\n", i386_fmtdev(rootdev));
return (EINVAL);
}
#endif
free(rootdev);
/* find the last module in the chain */
addr = 0;
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
if (addr < (xp->f_addr + xp->f_size))
addr = xp->f_addr + xp->f_size;
}
/* pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
/* copy our environment */
envp = addr;
addr = bi_copyenv(addr);
/* pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL)
kfp = file_findfile(NULL, "elf32 kernel");
if (kfp == NULL)
panic("can't find kernel file");
kernend = 0; /* fill it in later */
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
#if 0
bios_addsmapdata(kfp);
#endif
/* Figure out the size and location of the metadata */
*modulep = addr;
size = bi_copymodules32(0);
kernend = roundup(addr + size, PAGE_SIZE);
*kernendp = kernend;
/* patch MODINFOMD_KERNEND */
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
bcopy(&kernend, md->md_data, sizeof kernend);
/* copy module list and metadata */
(void)bi_copymodules32(addr);
ssym = esym = 0;
md = file_findmetadata(kfp, MODINFOMD_SSYM);
if (md != NULL)
ssym = *((vm_offset_t *)&(md->md_data));
md = file_findmetadata(kfp, MODINFOMD_ESYM);
if (md != NULL)
esym = *((vm_offset_t *)&(md->md_data));
if (ssym == 0 || esym == 0)
ssym = esym = 0; /* sanity */
/* legacy bootinfo structure */
kernelname = getenv("kernelname");
userboot_getdev(NULL, kernelname, &kernelpath);
bi.bi_version = BOOTINFO_VERSION;
bi.bi_kernelname = 0; /* XXX char * -> kernel name */
bi.bi_nfs_diskless = 0; /* struct nfs_diskless * */
bi.bi_n_bios_used = 0; /* XXX would have to hook biosdisk driver for these */
#if 0
for (i = 0; i < N_BIOS_GEOM; i++)
bi.bi_bios_geom[i] = bd_getbigeom(i);
#endif
bi.bi_size = sizeof(bi);
bi.bi_memsizes_valid = 1;
#if 0
bi.bi_basemem = bios_basemem / 1024;
bi.bi_extmem = bios_extmem / 1024;
#endif
bi.bi_envp = envp;
bi.bi_modulep = *modulep;
bi.bi_kernend = kernend;
bi.bi_symtab = ssym; /* XXX this is only the primary kernel symtab */
bi.bi_esymtab = esym;
/*
* Copy the legacy bootinfo and kernel name to the guest at 0x2000
*/
bi.bi_kernelname = (char *) (0x2000 + sizeof(bi));
CALLBACK(copyin, &bi, 0x2000, sizeof(bi));
CALLBACK(copyin, kernelname, 0x2000 + sizeof(bi), strlen(kernelname) + 1);
/* legacy boot arguments */
*howtop = howto | RB_BOOTINFO;
*bootdevp = bootdevnr;
*bip = 0x2000;
return(0);
}