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stand/multiboot2: add support for booting a Xen dom0 in UEFI mode

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Add some basic multiboot2 infrastructure to the EFI loader in order to
be capable of booting a FreeBSD/Xen dom0 when booted from UEFI.

Only a very limited subset of the multiboot2 protocol is implemented
in order to support enough to boot into Xen, the implementation
doesn't intend to be a full multiboot2 capable implementation.

Such multiboot2 functionality is hooked up into the amd64 EFI loader,
which is the only architecture that supports Xen dom0 on FreeBSD.

The options to boot a FreeBSD/Xen dom0 system are exactly the same as
on BIOS, and requires setting the xen_kernel and xen_cmdline options
in loader.conf.

Sponsored by:		Citrix Systems R&D
Reviewed by:		tsoome, imp
Differential revision:	https://reviews.freebsd.org/D28497
This commit is contained in:
Roger Pau Monné 2021-01-27 12:23:32 +01:00
parent 7d3259775c
commit adda2797eb
6 changed files with 1002 additions and 0 deletions
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1
stand/efi/loader/arch/amd64/Makefile.inc
View File

@ -4,6 +4,7 @@ SRCS+= amd64_tramp.S \
start.S \
elf64_freebsd.c \
trap.c \
multiboot2.c \
exc.S
.PATH: ${BOOTSRC}/i386/libi386

12
stand/efi/loader/arch/amd64/amd64_tramp.S
View File

@ -30,6 +30,9 @@
#include <machine/asmacros.h>
#define ASM_FILE
#include "multiboot2.h"
.text
.globl amd64_tramp
@ -58,6 +61,15 @@ amd64_tramp:
ALIGN_TEXT
amd64_tramp_end:
/* void multiboot2_exec(uint64_t entry, uint64_t multiboot_info, uint64_t stack) */
.globl multiboot2_exec
multiboot2_exec:
movq %rdx,%rsp
pushq %rdi
movq %rsi,%rbx
movq $MULTIBOOT2_BOOTLOADER_MAGIC,%rax
ret
.data
.globl amd64_tramp_size
amd64_tramp_size:

5
stand/efi/loader/arch/amd64/elf64_freebsd.c
View File

@ -69,7 +69,12 @@ static struct file_format amd64_elf_obj = {
.l_exec = elf64_obj_exec,
};
extern struct file_format multiboot2;
extern struct file_format multiboot2_obj;
struct file_format *file_formats[] = {
&multiboot2,
&multiboot2_obj,
&amd64_elf,
&amd64_elf_obj,
NULL

567
stand/efi/loader/arch/amd64/multiboot2.c Normal file
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@ -0,0 +1,567 @@
/*-
* Copyright (c) 2021 Roger Pau Monné <royger@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.
*/
/*
* This multiboot2 implementation only implements a subset of the full
* multiboot2 specification in order to be able to boot Xen and a
* FreeBSD Dom0. Trying to use it to boot other multiboot2 compliant
* kernels will most surely fail.
*
* The full multiboot specification can be found here:
* https://www.gnu.org/software/grub/manual/multiboot2/multiboot.html
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <sys/stdint.h>
#define _MACHINE_ELF_WANT_32BIT
#include <machine/elf.h>
#include <machine/metadata.h>
#include <string.h>
#include <stand.h>
#include <efi.h>
#include <efilib.h>
#include "bootstrap.h"
#include "multiboot2.h"
#include "loader_efi.h"
extern int elf32_loadfile_raw(char *filename, uint64_t dest,
struct preloaded_file **result, int multiboot);
extern int elf64_load_modmetadata(struct preloaded_file *fp, uint64_t dest);
extern int elf64_obj_loadfile(char *filename, uint64_t dest,
struct preloaded_file **result);
extern int bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp,
bool exit_bs);
extern void multiboot2_exec(void *entry, uint64_t multiboot_info,
uint64_t stack);
/*
* Multiboot2 header information to pass between the loading and the exec
* functions.
*/
struct mb2hdr {
uint32_t efi64_entry;
};
static int
loadfile(char *filename, uint64_t dest, struct preloaded_file **result)
{
unsigned int i;
int error, fd;
void *header_search = NULL;
void *multiboot = NULL;
ssize_t search_size;
struct multiboot_header *header;
char *cmdline;
struct mb2hdr hdr;
bool keep_bs = false;
/*
* Read MULTIBOOT_SEARCH size in order to search for the
* multiboot magic header.
*/
if (filename == NULL)
return (EFTYPE);
if ((fd = open(filename, O_RDONLY)) == -1)
return (errno);
header_search = malloc(MULTIBOOT_SEARCH);
if (header_search == NULL) {
error = ENOMEM;
goto out;
}
search_size = read(fd, header_search, MULTIBOOT_SEARCH);
for (i = 0; i < search_size; i += MULTIBOOT_HEADER_ALIGN) {
header = header_search + i;
if (header->magic == MULTIBOOT2_HEADER_MAGIC)
break;
}
if (i >= MULTIBOOT_SEARCH) {
error = EFTYPE;
goto out;
}
/* Valid multiboot header has been found, validate checksum */
if (header->magic + header->architecture + header->header_length +
header->checksum != 0) {
printf("Multiboot checksum failed, magic: %#x architecture: %#x"
"header_length %#x checksum: %#x\n",
header->magic, header->architecture, header->header_length,
header->checksum);
error = EFTYPE;
goto out;
}
if (header->architecture != MULTIBOOT2_ARCHITECTURE_I386) {
printf("Unsupported architecture: %#x\n",
header->architecture);
error = EFTYPE;
goto out;
}
multiboot = malloc(header->header_length - sizeof(*header));
error = lseek(fd, i + sizeof(*header), SEEK_SET);
if (error != i + sizeof(*header)) {
printf("Unable to set file pointer to header location: %d\n",
error);
goto out;
}
search_size = read(fd, multiboot,
header->header_length - sizeof(*header));
bzero(&hdr, sizeof(hdr));
for (i = 0; i < search_size; ) {
struct multiboot_header_tag *tag;
struct multiboot_header_tag_entry_address *entry;
struct multiboot_header_tag_information_request *req;
unsigned int j;
tag = multiboot + i;
switch(tag->type) {
case MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST:
req = (void *)tag;
for (j = 0;
j < (tag->size - sizeof(*tag)) / sizeof(uint32_t);
j++) {
switch (req->requests[j]) {
case MULTIBOOT_TAG_TYPE_MMAP:
case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO:
/* Only applicable to BIOS. */
break;
case MULTIBOOT_TAG_TYPE_EFI_BS:
case MULTIBOOT_TAG_TYPE_EFI64:
case MULTIBOOT_TAG_TYPE_EFI64_IH:
/* Tags unconditionally added. */
break;
default:
if (req->flags &
MULTIBOOT_HEADER_TAG_OPTIONAL)
break;
printf(
"Unknown non-optional information request %u\n",
req->requests[j]);
error = EINVAL;
goto out;
}
}
break;
case MULTIBOOT_HEADER_TAG_EFI_BS:
/* Never shut down BS. */
keep_bs = true;
break;
case MULTIBOOT_HEADER_TAG_MODULE_ALIGN:
/* We will align modules by default already. */
case MULTIBOOT_HEADER_TAG_END:
break;
case MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64:
entry = (void *)tag;
hdr.efi64_entry = entry->entry_addr;
break;
default:
if (tag->flags & MULTIBOOT_HEADER_TAG_OPTIONAL)
break;
printf("Unknown header tag %#x not optional\n",
tag->type);
error = EINVAL;
goto out;
}
i += roundup2(tag->size, MULTIBOOT_TAG_ALIGN);
if (tag->type == MULTIBOOT_HEADER_TAG_END)
break;
}
if (hdr.efi64_entry == 0) {
printf("No EFI64 entry address provided\n");
error = EINVAL;
goto out;
}
if (!keep_bs) {
printf("Unable to boot MB2 with BS exited\n");
error = EINVAL;
goto out;
}
error = elf32_loadfile_raw(filename, dest, result, 1);
if (error != 0) {
printf(
"elf32_loadfile_raw failed: %d unable to load multiboot kernel\n",
error);
goto out;
}
file_addmetadata(*result, MODINFOMD_NOCOPY | MODINFOMD_MB2HDR,
sizeof(hdr), &hdr);
/*
* f_addr is already aligned to PAGE_SIZE, make sure
* f_size it's also aligned so when the modules are loaded
* they are aligned to PAGE_SIZE.
*/
(*result)->f_size = roundup((*result)->f_size, PAGE_SIZE);
out:
if (header_search != NULL)
free(header_search);
if (multiboot != NULL)
free(multiboot);
close(fd);
return (error);
}
static unsigned int add_string(void *buf, unsigned int type, const char *str)
{
struct multiboot_tag *tag;
tag = buf;
tag->type = type;
tag->size = sizeof(*tag) + strlen(str) + 1;
strcpy(buf + sizeof(*tag), str);
return (roundup2(tag->size, MULTIBOOT_TAG_ALIGN));
}
static unsigned int add_efi(void *buf)
{
struct multiboot_tag *bs;
struct multiboot_tag_efi64 *efi64;
struct multiboot_tag_efi64_ih *ih;
unsigned int len;
len = 0;
bs = buf;
bs->type = MULTIBOOT_TAG_TYPE_EFI_BS;
bs->size = sizeof(*bs);
len += roundup2(bs->size, MULTIBOOT_TAG_ALIGN);
efi64 = buf + len;
efi64->type = MULTIBOOT_TAG_TYPE_EFI64;
efi64->size = sizeof(*efi64);
efi64->pointer = (uintptr_t)ST;
len += roundup2(efi64->size, MULTIBOOT_TAG_ALIGN);
ih = buf + len;
ih->type = MULTIBOOT_TAG_TYPE_EFI64_IH;
ih->size = sizeof(*ih);
ih->pointer = (uintptr_t)IH;
return (len + roundup2(ih->size, MULTIBOOT_TAG_ALIGN));
}
static unsigned int add_module(void *buf, vm_offset_t start, vm_offset_t end,
const char *cmdline)
{
struct multiboot_tag_module *mod;
mod = buf;
mod->type = MULTIBOOT_TAG_TYPE_MODULE;
mod->size = sizeof(*mod);
mod->mod_start = start;
mod->mod_end = end;
if (cmdline != NULL)
{
strcpy(buf + sizeof(*mod), cmdline);
mod->size += strlen(cmdline) + 1;
}
return (roundup2(mod->size, MULTIBOOT_TAG_ALIGN));
}
static unsigned int add_end(void *buf)
{
struct multiboot_tag *tag;
tag = buf;
tag->type = MULTIBOOT_TAG_TYPE_END;
tag->size = sizeof(*tag);
return (roundup2(tag->size, MULTIBOOT_TAG_ALIGN));
}
static int
exec(struct preloaded_file *fp)
{
EFI_PHYSICAL_ADDRESS addr = 0;
EFI_PHYSICAL_ADDRESS stack = 0;
EFI_STATUS status;
void *multiboot_space;
vm_offset_t modulep, kernend, kern_base,
payload_base;
char *cmdline = NULL;
size_t len;
int error;
uint32_t *total_size;
struct file_metadata *md;
struct xen_header header;
struct mb2hdr *hdr;
CTASSERT(sizeof(header) <= PAGE_SIZE);
if ((md = file_findmetadata(fp,
MODINFOMD_NOCOPY | MODINFOMD_MB2HDR)) == NULL) {
printf("Missing Multiboot2 EFI64 entry point\n");
return(EFTYPE);
}
hdr = (void *)&md->md_data;
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
EFI_SIZE_TO_PAGES(PAGE_SIZE), &addr);
if (EFI_ERROR(status)) {
printf("Failed to allocate pages for multiboot2 header: %lu\n",
EFI_ERROR_CODE(status));
error = ENOMEM;
goto error;
}
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
EFI_SIZE_TO_PAGES(128 * 1024), &stack);
if (EFI_ERROR(status)) {
printf("Failed to allocate pages for Xen stack: %lu\n",
EFI_ERROR_CODE(status));
error = ENOMEM;
goto error;
}
/*
* Scratch space to build the multiboot2 header. Reserve the start of
* the space to place the header with the size, which we don't know
* yet.
*/
multiboot_space = (void *)(uintptr_t)(addr + sizeof(uint32_t) * 2);
/*
* Don't pass the memory size found by the bootloader, the memory
* available to Dom0 will be lower than that.
*/
unsetenv("smbios.memory.enabled");
/* Set the Xen command line. */
if (fp->f_args == NULL) {
/* Add the Xen command line if it is set. */
cmdline = getenv("xen_cmdline");
if (cmdline != NULL) {
fp->f_args = strdup(cmdline);
if (fp->f_args == NULL) {
error = ENOMEM;
goto error;
}
}
}
if (fp->f_args != NULL) {
len = strlen(fp->f_name) + 1 + strlen(fp->f_args) + 1;
cmdline = malloc(len);
if (cmdline == NULL) {
error = ENOMEM;
goto error;
}
snprintf(cmdline, len, "%s %s", fp->f_name, fp->f_args);
multiboot_space += add_string(multiboot_space,
MULTIBOOT_TAG_TYPE_CMDLINE, cmdline);
free(cmdline);
}
multiboot_space += add_string(multiboot_space,
MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME, "FreeBSD Loader");
multiboot_space += add_efi(multiboot_space);
/*
* Prepare the multiboot module list, Xen assumes the first
* module is the Dom0 kernel, and the second one is the initramfs.
* This is not optimal for FreeBSD, that doesn't have a initramfs
* but instead loads modules dynamically and creates the metadata
* info on-the-fly.
*
* As expected, the first multiboot module is going to be the
* FreeBSD kernel loaded as a raw file. The second module is going
* to contain the metadata info and the loaded modules.
*
* There's a small header prefixed in the second module that contains
* some information required to calculate the relocated address of
* modulep based on the original offset of modulep from the start of
* the module address. Note other fields might be added to this header
* if required.
*
* Native layout:
* fp->f_addr + fp->f_size
* +---------+----------------+------------+
* | | | |
* | Kernel | Modules | Metadata |
* | | | |
* +---------+----------------+------------+
* fp->f_addr modulep kernend
*
* Xen dom0 layout:
* fp->f_addr fp->f_addr + fp->f_size
* +---------+------------+----------------+------------+
* | | | | |
* | Kernel | xen_header | Modules | Metadata |
* | | | | |
* +---------+------------+----------------+------------+
* modulep kernend
* \________/\__________________________________________/
* module 0 module 1
*/
fp = file_findfile(NULL, "elf kernel");
if (fp == NULL) {
printf("No FreeBSD kernel provided, aborting\n");
error = EINVAL;
goto error;
}
error = bi_load(fp->f_args, &modulep, &kernend, false);
if (error != 0)
goto error;
/*
* Note that the Xen kernel requires to be started with BootServices
* enabled, and hence we cannot use efi_copy_finish to relocate the
* loaded data from the staging area to the expected loaded addresses.
* This is fine because the Xen kernel is relocatable, so it can boot
* fine straight from the staging area. We use efi_translate to get the
* staging addresses where the kernels and metadata are currently
* loaded.
*/
kern_base = (uintptr_t)efi_translate(fp->f_addr);
payload_base = kern_base + fp->f_size - PAGE_SIZE;
multiboot_space += add_module(multiboot_space, kern_base, payload_base,
NULL);
multiboot_space += add_module(multiboot_space, payload_base,
(uintptr_t)efi_translate(kernend), "header");
header.flags = XENHEADER_HAS_MODULEP_OFFSET;
header.modulep_offset = modulep - (fp->f_addr + fp->f_size - PAGE_SIZE);
archsw.arch_copyin(&header, fp->f_addr + fp->f_size - PAGE_SIZE,
sizeof(header));
multiboot_space += add_end(multiboot_space);
total_size = (uint32_t *)(uintptr_t)(addr);
*total_size = (uintptr_t)multiboot_space - addr;
if (*total_size > PAGE_SIZE)
panic("Multiboot header exceeds fixed size");
efi_time_fini();
dev_cleanup();
multiboot2_exec(efi_translate(hdr->efi64_entry), addr,
stack + 128 * 1024);
panic("exec returned");
error:
if (addr)
BS->FreePages(addr, EFI_SIZE_TO_PAGES(PAGE_SIZE));
if (stack)
BS->FreePages(stack, EFI_SIZE_TO_PAGES(128 * 1024));
return (error);
}
static int
obj_loadfile(char *filename, uint64_t dest, struct preloaded_file **result)
{
struct preloaded_file *mfp, *kfp, *rfp;
struct kernel_module *kmp;
int error;
/* See if there's a multiboot kernel loaded */
mfp = file_findfile(NULL, "elf multiboot kernel");
if (mfp == NULL)
return (EFTYPE);
/*
* We have a multiboot kernel loaded, see if there's a FreeBSD
* kernel loaded also.
*/
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL) {
/*
* No kernel loaded, this must be it. The kernel has to
* be loaded as a raw file, it will be processed by
* Xen and correctly loaded as an ELF file.
*/
rfp = file_loadraw(filename, "elf kernel", 0);
if (rfp == NULL) {
printf(
"Unable to load %s as a multiboot payload kernel\n",
filename);
return (EINVAL);
}
/* Load kernel metadata... */
setenv("kernelname", filename, 1);
error = elf64_load_modmetadata(rfp, rfp->f_addr + rfp->f_size);
if (error) {
printf("Unable to load kernel %s metadata error: %d\n",
rfp->f_name, error);
return (EINVAL);
}
/*
* Reserve one page at the end of the kernel to place some
* metadata in order to cope for Xen relocating the modules and
* the metadata information.
*/
rfp->f_size = roundup(rfp->f_size, PAGE_SIZE);
rfp->f_size += PAGE_SIZE;
*result = rfp;
} else {
/* The rest should be loaded as regular modules */
error = elf64_obj_loadfile(filename, dest, result);
if (error != 0) {
printf("Unable to load %s as an object file, error: %d",
filename, error);
return (error);
}
}
return (0);
}
static int
obj_exec(struct preloaded_file *fp)
{
return (EFTYPE);
}
struct file_format multiboot2 = { loadfile, exec };
struct file_format multiboot2_obj = { obj_loadfile, obj_exec };

416
stand/efi/loader/arch/amd64/multiboot2.h Normal file
View File

@ -0,0 +1,416 @@
/* multiboot2.h - Multiboot 2 header file. */
/* Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
* DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef MULTIBOOT_HEADER
#define MULTIBOOT_HEADER 1
/* How many bytes from the start of the file we search for the header. */
#define MULTIBOOT_SEARCH 32768
#define MULTIBOOT_HEADER_ALIGN 8
/* The magic field should contain this. */
#define MULTIBOOT2_HEADER_MAGIC 0xe85250d6
/* This should be in %eax. */
#define MULTIBOOT2_BOOTLOADER_MAGIC 0x36d76289
/* Alignment of multiboot modules. */
#define MULTIBOOT_MOD_ALIGN 0x00001000
/* Alignment of the multiboot info structure. */
#define MULTIBOOT_INFO_ALIGN 0x00000008
/* Flags set in the 'flags' member of the multiboot header. */
#define MULTIBOOT_TAG_ALIGN 8
#define MULTIBOOT_TAG_TYPE_END 0
#define MULTIBOOT_TAG_TYPE_CMDLINE 1
#define MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME 2
#define MULTIBOOT_TAG_TYPE_MODULE 3
#define MULTIBOOT_TAG_TYPE_BASIC_MEMINFO 4
#define MULTIBOOT_TAG_TYPE_BOOTDEV 5
#define MULTIBOOT_TAG_TYPE_MMAP 6
#define MULTIBOOT_TAG_TYPE_VBE 7
#define MULTIBOOT_TAG_TYPE_FRAMEBUFFER 8
#define MULTIBOOT_TAG_TYPE_ELF_SECTIONS 9
#define MULTIBOOT_TAG_TYPE_APM 10
#define MULTIBOOT_TAG_TYPE_EFI32 11
#define MULTIBOOT_TAG_TYPE_EFI64 12
#define MULTIBOOT_TAG_TYPE_SMBIOS 13
#define MULTIBOOT_TAG_TYPE_ACPI_OLD 14
#define MULTIBOOT_TAG_TYPE_ACPI_NEW 15
#define MULTIBOOT_TAG_TYPE_NETWORK 16
#define MULTIBOOT_TAG_TYPE_EFI_MMAP 17
#define MULTIBOOT_TAG_TYPE_EFI_BS 18
#define MULTIBOOT_TAG_TYPE_EFI32_IH 19
#define MULTIBOOT_TAG_TYPE_EFI64_IH 20
#define MULTIBOOT_TAG_TYPE_LOAD_BASE_ADDR 21
#define MULTIBOOT_HEADER_TAG_END 0
#define MULTIBOOT_HEADER_TAG_INFORMATION_REQUEST 1
#define MULTIBOOT_HEADER_TAG_ADDRESS 2
#define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS 3
#define MULTIBOOT_HEADER_TAG_CONSOLE_FLAGS 4
#define MULTIBOOT_HEADER_TAG_FRAMEBUFFER 5
#define MULTIBOOT_HEADER_TAG_MODULE_ALIGN 6
#define MULTIBOOT_HEADER_TAG_EFI_BS 7
#define MULTIBOOT_HEADER_TAG_ENTRY_ADDRESS_EFI64 9
#define MULTIBOOT_HEADER_TAG_RELOCATABLE 10
#define MULTIBOOT2_ARCHITECTURE_I386 0
#define MULTIBOOT2_ARCHITECTURE_MIPS32 4
#define MULTIBOOT_HEADER_TAG_OPTIONAL 1
#define MULTIBOOT_LOAD_PREFERENCE_NONE 0
#define MULTIBOOT_LOAD_PREFERENCE_LOW 1
#define MULTIBOOT_LOAD_PREFERENCE_HIGH 2
#define MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED 1
#define MULTIBOOT_CONSOLE_FLAGS_EGA_TEXT_SUPPORTED 2
#ifndef ASM_FILE
typedef unsigned char multiboot_uint8_t;
typedef unsigned short multiboot_uint16_t;
typedef unsigned int multiboot_uint32_t;
typedef unsigned long long multiboot_uint64_t;
struct multiboot_header
{
/* Must be MULTIBOOT_MAGIC - see above. */
multiboot_uint32_t magic;
/* ISA */
multiboot_uint32_t architecture;
/* Total header length. */
multiboot_uint32_t header_length;
/* The above fields plus this one must equal 0 mod 2^32. */
multiboot_uint32_t checksum;
};
struct multiboot_header_tag
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
};
struct multiboot_header_tag_information_request
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t requests[0];
};
struct multiboot_header_tag_address
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t header_addr;
multiboot_uint32_t load_addr;
multiboot_uint32_t load_end_addr;
multiboot_uint32_t bss_end_addr;
};
struct multiboot_header_tag_entry_address
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t entry_addr;
};
struct multiboot_header_tag_console_flags
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t console_flags;
};
struct multiboot_header_tag_framebuffer
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t width;
multiboot_uint32_t height;
multiboot_uint32_t depth;
};
struct multiboot_header_tag_module_align
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
};
struct multiboot_header_tag_relocatable
{
multiboot_uint16_t type;
multiboot_uint16_t flags;
multiboot_uint32_t size;
multiboot_uint32_t min_addr;
multiboot_uint32_t max_addr;
multiboot_uint32_t align;
multiboot_uint32_t preference;
};
struct multiboot_color
{
multiboot_uint8_t red;
multiboot_uint8_t green;
multiboot_uint8_t blue;
};
struct multiboot_mmap_entry
{
multiboot_uint64_t addr;
multiboot_uint64_t len;
#define MULTIBOOT_MEMORY_AVAILABLE 1
#define MULTIBOOT_MEMORY_RESERVED 2
#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
#define MULTIBOOT_MEMORY_NVS 4
#define MULTIBOOT_MEMORY_BADRAM 5
multiboot_uint32_t type;
multiboot_uint32_t zero;
};
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
struct multiboot_tag
{
multiboot_uint32_t type;
multiboot_uint32_t size;
};
struct multiboot_tag_string
{
multiboot_uint32_t type;
multiboot_uint32_t size;
char string[0];
};
struct multiboot_tag_module
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t mod_start;
multiboot_uint32_t mod_end;
char cmdline[0];
};
struct multiboot_tag_basic_meminfo
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t mem_lower;
multiboot_uint32_t mem_upper;
};
struct multiboot_tag_bootdev
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t biosdev;
multiboot_uint32_t slice;
multiboot_uint32_t part;
};
struct multiboot_tag_mmap
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t entry_size;
multiboot_uint32_t entry_version;
struct multiboot_mmap_entry entries[0];
};
struct multiboot_vbe_info_block
{
multiboot_uint8_t external_specification[512];
};
struct multiboot_vbe_mode_info_block
{
multiboot_uint8_t external_specification[256];
};
struct multiboot_tag_vbe
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint16_t vbe_mode;
multiboot_uint16_t vbe_interface_seg;
multiboot_uint16_t vbe_interface_off;
multiboot_uint16_t vbe_interface_len;
struct multiboot_vbe_info_block vbe_control_info;
struct multiboot_vbe_mode_info_block vbe_mode_info;
};
struct multiboot_tag_framebuffer_common
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint64_t framebuffer_addr;
multiboot_uint32_t framebuffer_pitch;
multiboot_uint32_t framebuffer_width;
multiboot_uint32_t framebuffer_height;
multiboot_uint8_t framebuffer_bpp;
#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
multiboot_uint8_t framebuffer_type;
multiboot_uint16_t reserved;
};
struct multiboot_tag_framebuffer
{
struct multiboot_tag_framebuffer_common common;
union
{
struct
{
multiboot_uint16_t framebuffer_palette_num_colors;
struct multiboot_color framebuffer_palette[0];
};
struct
{
multiboot_uint8_t framebuffer_red_field_position;
multiboot_uint8_t framebuffer_red_mask_size;
multiboot_uint8_t framebuffer_green_field_position;
multiboot_uint8_t framebuffer_green_mask_size;
multiboot_uint8_t framebuffer_blue_field_position;
multiboot_uint8_t framebuffer_blue_mask_size;
};
};
};
struct multiboot_tag_elf_sections
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t num;
multiboot_uint32_t entsize;
multiboot_uint32_t shndx;
char sections[0];
};
struct multiboot_tag_apm
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint16_t version;
multiboot_uint16_t cseg;
multiboot_uint32_t offset;
multiboot_uint16_t cseg_16;
multiboot_uint16_t dseg;
multiboot_uint16_t flags;
multiboot_uint16_t cseg_len;
multiboot_uint16_t cseg_16_len;
multiboot_uint16_t dseg_len;
};
struct multiboot_tag_efi32
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t pointer;
};
struct multiboot_tag_efi64
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint64_t pointer;
};
struct multiboot_tag_smbios
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint8_t major;
multiboot_uint8_t minor;
multiboot_uint8_t reserved[6];
multiboot_uint8_t tables[0];
};
struct multiboot_tag_old_acpi
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint8_t rsdp[0];
};
struct multiboot_tag_new_acpi
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint8_t rsdp[0];
};
struct multiboot_tag_network
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint8_t dhcpack[0];
};
struct multiboot_tag_efi_mmap
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t descr_size;
multiboot_uint32_t descr_vers;
multiboot_uint8_t efi_mmap[0];
};
struct multiboot_tag_efi32_ih
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t pointer;
};
struct multiboot_tag_efi64_ih
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint64_t pointer;
};
struct multiboot_tag_load_base_addr
{
multiboot_uint32_t type;
multiboot_uint32_t size;
multiboot_uint32_t load_base_addr;
};
#endif /* ! ASM_FILE */
#endif /* ! MULTIBOOT_HEADER */

1
sys/sys/linker.h
View File

@ -215,6 +215,7 @@ void *linker_hwpmc_list_objects(void);
#define MODINFOMD_SSYM 0x0003 /* start of symbols */
#define MODINFOMD_ESYM 0x0004 /* end of symbols */
#define MODINFOMD_DYNAMIC 0x0005 /* _DYNAMIC pointer */
#define MODINFOMD_MB2HDR 0x0006 /* MB2 header info */
/* These values are MD on PowerPC */
#if !defined(__powerpc__)
#define MODINFOMD_ENVP 0x0006 /* envp[] */