322 lines
8.5 KiB
C
322 lines
8.5 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("$FreeBSD$");
|
|
|
|
#include <stand.h>
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/linker.h>
|
|
#include <machine/elf.h>
|
|
#include <machine/bootinfo.h>
|
|
|
|
#include "bootstrap.h"
|
|
|
|
/*
|
|
* Return a 'boothowto' value corresponding to the kernel arguments in
|
|
* (kargs) and any relevant environment variables.
|
|
*/
|
|
static struct
|
|
{
|
|
const char *ev;
|
|
int mask;
|
|
} howto_names[] = {
|
|
{"boot_askname", RB_ASKNAME},
|
|
{"boot_cdrom", RB_CDROM},
|
|
{"boot_ddb", RB_KDB},
|
|
{"boot_dfltroot", RB_DFLTROOT},
|
|
{"boot_gdb", RB_GDB},
|
|
{"boot_multicons", RB_MULTIPLE},
|
|
{"boot_mute", RB_MUTE},
|
|
{"boot_pause", RB_PAUSE},
|
|
{"boot_serial", RB_SERIAL},
|
|
{"boot_single", RB_SINGLE},
|
|
{"boot_verbose", RB_VERBOSE},
|
|
{NULL, 0}
|
|
};
|
|
|
|
extern char *ski_fmtdev(void *vdev);
|
|
extern int ski_init_stubs(struct bootinfo *);
|
|
|
|
int
|
|
bi_getboothowto(char *kargs)
|
|
{
|
|
char *cp;
|
|
int howto;
|
|
int active;
|
|
int i;
|
|
|
|
/* Parse kargs */
|
|
howto = 0;
|
|
if (kargs != NULL) {
|
|
cp = kargs;
|
|
active = 0;
|
|
while (*cp != 0) {
|
|
if (!active && (*cp == '-')) {
|
|
active = 1;
|
|
} else if (active)
|
|
switch (*cp) {
|
|
case 'a':
|
|
howto |= RB_ASKNAME;
|
|
break;
|
|
case 'C':
|
|
howto |= RB_CDROM;
|
|
break;
|
|
case 'd':
|
|
howto |= RB_KDB;
|
|
break;
|
|
case 'D':
|
|
howto |= RB_MULTIPLE;
|
|
break;
|
|
case 'm':
|
|
howto |= RB_MUTE;
|
|
break;
|
|
case 'g':
|
|
howto |= RB_GDB;
|
|
break;
|
|
case 'h':
|
|
howto |= RB_SERIAL;
|
|
break;
|
|
case 'p':
|
|
howto |= RB_PAUSE;
|
|
break;
|
|
case 'r':
|
|
howto |= RB_DFLTROOT;
|
|
break;
|
|
case 's':
|
|
howto |= RB_SINGLE;
|
|
break;
|
|
case 'v':
|
|
howto |= RB_VERBOSE;
|
|
break;
|
|
default:
|
|
active = 0;
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
}
|
|
/* get equivalents from the environment */
|
|
for (i = 0; howto_names[i].ev != NULL; i++)
|
|
if (getenv(howto_names[i].ev) != NULL)
|
|
howto |= howto_names[i].mask;
|
|
if (!strcmp(getenv("console"), "comconsole"))
|
|
howto |= RB_SERIAL;
|
|
if (!strcmp(getenv("console"), "nullconsole"))
|
|
howto |= RB_MUTE;
|
|
return(howto);
|
|
}
|
|
|
|
/*
|
|
* Copy the environment into the load area starting at (addr).
|
|
* Each variable is formatted as <name>=<value>, with a single nul
|
|
* separating each variable, and a double nul terminating the environment.
|
|
*/
|
|
vm_offset_t
|
|
bi_copyenv(vm_offset_t addr)
|
|
{
|
|
struct env_var *ep;
|
|
|
|
/* traverse the environment */
|
|
for (ep = environ; ep != NULL; ep = ep->ev_next) {
|
|
ski_copyin(ep->ev_name, addr, strlen(ep->ev_name));
|
|
addr += strlen(ep->ev_name);
|
|
ski_copyin("=", addr, 1);
|
|
addr++;
|
|
if (ep->ev_value != NULL) {
|
|
ski_copyin(ep->ev_value, addr, strlen(ep->ev_value));
|
|
addr += strlen(ep->ev_value);
|
|
}
|
|
ski_copyin("", addr, 1);
|
|
addr++;
|
|
}
|
|
ski_copyin("", addr, 1);
|
|
addr++;
|
|
return(addr);
|
|
}
|
|
|
|
/*
|
|
* 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) { \
|
|
u_int32_t x = (v); \
|
|
ski_copyin(&x, a, sizeof(x)); \
|
|
a += sizeof(x); \
|
|
}
|
|
|
|
#define MOD_STR(t, a, s) { \
|
|
COPY32(t, a); \
|
|
COPY32(strlen(s) + 1, a); \
|
|
ski_copyin(s, a, strlen(s) + 1); \
|
|
a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
|
|
}
|
|
|
|
#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
|
|
#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
|
|
#define MOD_ARGS(a, s) MOD_STR(MODINFO_ARGS, a, s)
|
|
|
|
#define MOD_VAR(t, a, s) { \
|
|
COPY32(t, a); \
|
|
COPY32(sizeof(s), a); \
|
|
ski_copyin(&s, a, sizeof(s)); \
|
|
a += roundup(sizeof(s), sizeof(u_int64_t)); \
|
|
}
|
|
|
|
#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
|
|
#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
|
|
|
|
#define MOD_METADATA(a, mm) { \
|
|
COPY32(MODINFO_METADATA | mm->md_type, a); \
|
|
COPY32(mm->md_size, a); \
|
|
ski_copyin(mm->md_data, a, mm->md_size); \
|
|
a += roundup(mm->md_size, sizeof(u_int64_t));\
|
|
}
|
|
|
|
#define MOD_END(a) { \
|
|
COPY32(MODINFO_END, a); \
|
|
COPY32(0, a); \
|
|
}
|
|
|
|
vm_offset_t
|
|
bi_copymodules(vm_offset_t addr)
|
|
{
|
|
struct preloaded_file *fp;
|
|
struct file_metadata *md;
|
|
|
|
/* 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); /* this field must come first */
|
|
MOD_TYPE(addr, fp->f_type);
|
|
if (fp->f_args)
|
|
MOD_ARGS(addr, fp->f_args);
|
|
MOD_ADDR(addr, fp->f_addr);
|
|
MOD_SIZE(addr, fp->f_size);
|
|
for (md = fp->f_metadata; md != NULL; md = md->md_next)
|
|
if (!(md->md_type & MODINFOMD_NOCOPY))
|
|
MOD_METADATA(addr, md);
|
|
}
|
|
MOD_END(addr);
|
|
return(addr);
|
|
}
|
|
|
|
/*
|
|
* Load the information expected by an alpha kernel.
|
|
*
|
|
* - The kernel environment is copied into kernel space.
|
|
* - Module metadata are formatted and placed in kernel space.
|
|
*/
|
|
int
|
|
bi_load(struct bootinfo *bi, struct preloaded_file *fp, char *args)
|
|
{
|
|
char *rootdevname;
|
|
struct ski_devdesc *rootdev;
|
|
struct preloaded_file *xp;
|
|
vm_offset_t addr, bootinfo_addr;
|
|
char *kernelname;
|
|
vm_offset_t ssym, esym;
|
|
struct file_metadata *md;
|
|
|
|
/*
|
|
* Version 1 bootinfo.
|
|
*/
|
|
bi->bi_magic = BOOTINFO_MAGIC;
|
|
bi->bi_version = 1;
|
|
|
|
/*
|
|
* Calculate boothowto.
|
|
*/
|
|
bi->bi_boothowto = bi_getboothowto(fp->f_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");
|
|
ski_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(ski_fmtdev((void *)rootdev));
|
|
free(rootdev);
|
|
|
|
ssym = esym = 0;
|
|
if ((md = file_findmetadata(fp, MODINFOMD_SSYM)) != NULL)
|
|
ssym = *((vm_offset_t *)&(md->md_data));
|
|
if ((md = file_findmetadata(fp, MODINFOMD_ESYM)) != NULL)
|
|
esym = *((vm_offset_t *)&(md->md_data));
|
|
if (ssym == 0 || esym == 0)
|
|
ssym = esym = 0; /* sanity */
|
|
|
|
bi->bi_symtab = ssym;
|
|
bi->bi_esymtab = esym;
|
|
|
|
/* 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 = (addr + PAGE_MASK) & ~PAGE_MASK;
|
|
|
|
/* copy our environment */
|
|
bi->bi_envp = addr;
|
|
addr = bi_copyenv(addr);
|
|
|
|
/* pad to a page boundary */
|
|
addr = (addr + PAGE_MASK) & ~PAGE_MASK;
|
|
|
|
/* copy module list and metadata */
|
|
bi->bi_modulep = addr;
|
|
addr = bi_copymodules(addr);
|
|
|
|
/* all done copying stuff in, save end of loaded object space */
|
|
bi->bi_kernend = addr;
|
|
|
|
return (ski_init_stubs(bi));
|
|
}
|