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eee511dec9d1f7e2bdfb4aebfe5ffbd70cdf6f51
xen/tools/libxc/xc_dom_armzimageloader.c
T
Ian Campbell 443701ef0c Replace FSF street address with canonical URL 
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html.

This is the result of:
$ git grep -El Mass\|Temple\|Franklin | xargs ./fsf.pl

Where fsf.pl is:
    #!/usr/bin/perl -w -pi.bak -0777
    my $repl = 'If not, see <http://www.gnu.org/licenses/>.';
    my $br = qr/(?:\s*\n\s*(?:[\*\#]|\/\/|\.\\" )?\s*|\s+)/;

    my $inwt = qr/[Ii]f${br}not,${br}write${br}(?:to${br})?the${br}Free${br}Software${br}Foundation,(?:${br}Inc\.,)?/;

    my $mass = qr/675${br}Mass${br}Ave,?${br}Cambridge,?${br}MA${br}02139,?${br}USA,?\.?/;
    my $franklin = qr/51${br}Franklin${br}St(?:reet)?(?:,${br}| - )Fifth${br}Floor,?${br}Boston,?${br}MA,?${br}02110-1301,?${br}USA,?\.?/;
    my $temple = qr/59${br}Temple${br}Place(?:,${br}| - )Suite${br}330,?${br}Boston,?${br}MA,?${br}021110?-1307,?${br}USA,?\.?/;

    s|$inwt$br$mass|$repl|m;
    s|$inwt$br$franklin|$repl|m;
    s|$inwt$br$temple|$repl|m;

The only remaining mentions of these addresses are in COPYING files which I
haven't touched.

Some of the changed files are imports from elsewhere, however
filtering them out is tricky, I think it is tolerable to have these
files be modified here and then perhaps reverted on the next sync,
since it's only 1-2 lines and obvious what is going on.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
2015-07-29 11:14:07 +01:00

272 lines
7.2 KiB
C
Raw Blame History

/*
* Xen domain builder -- ARM zImage bits
*
* Parse and load ARM zImage kernel images.
*
* Copyright (C) 2012, Citrix Systems.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "xg_private.h"
#include "xc_dom.h"
#include <arpa/inet.h> /* XXX ntohl is not the right function... */
struct minimal_dtb_header {
uint32_t magic;
uint32_t total_size;
/* There are other fields but we don't use them yet. */
};
#define DTB_MAGIC 0xd00dfeed
/* ------------------------------------------------------------ */
/* 32-bit zImage Support */
/* ------------------------------------------------------------ */
#define ZIMAGE32_MAGIC_OFFSET 0x24
#define ZIMAGE32_START_OFFSET 0x28
#define ZIMAGE32_END_OFFSET 0x2c
#define ZIMAGE32_MAGIC 0x016f2818
static int xc_dom_probe_zimage32_kernel(struct xc_dom_image *dom)
{
uint32_t *zimage;
if ( dom->kernel_blob == NULL )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: no kernel image loaded", __FUNCTION__);
return -EINVAL;
}
if ( dom->kernel_size < 0x30 /*sizeof(struct setup_header)*/ )
{
xc_dom_printf(dom->xch, "%s: kernel image too small", __FUNCTION__);
return -EINVAL;
}
zimage = (uint32_t *)dom->kernel_blob;
if ( zimage[ZIMAGE32_MAGIC_OFFSET/4] != ZIMAGE32_MAGIC )
{
xc_dom_printf(dom->xch, "%s: kernel is not an arm32 zImage", __FUNCTION__);
return -EINVAL;
}
return 0;
}
static int xc_dom_parse_zimage32_kernel(struct xc_dom_image *dom)
{
uint32_t *zimage;
uint32_t start, entry_addr;
uint64_t v_start, v_end;
uint64_t rambase = dom->rambase_pfn << XC_PAGE_SHIFT;
DOMPRINTF_CALLED(dom->xch);
zimage = (uint32_t *)dom->kernel_blob;
/* Do not load kernel at the very first RAM address */
v_start = rambase + 0x8000;
if ( dom->kernel_size > UINT64_MAX - v_start )
{
DOMPRINTF("%s: kernel is too large\n", __FUNCTION__);
return -EINVAL;
}
v_end = v_start + dom->kernel_size;
/*
* If start is invalid then the guest will start at some invalid
* address and crash, but this happens in guest context so doesn't
* concern us here.
*/
start = zimage[ZIMAGE32_START_OFFSET/4];
if (start == 0)
entry_addr = v_start;
else
entry_addr = start;
/* find kernel segment */
dom->kernel_seg.vstart = v_start;
dom->kernel_seg.vend = v_end;
dom->parms.virt_entry = entry_addr;
dom->parms.virt_base = rambase;
dom->guest_type = "xen-3.0-armv7l";
DOMPRINTF("%s: %s: 0x%" PRIx64 " -> 0x%" PRIx64 "",
__FUNCTION__, dom->guest_type,
dom->kernel_seg.vstart, dom->kernel_seg.vend);
return 0;
}
/* ------------------------------------------------------------ */
/* 64-bit zImage Support */
/* ------------------------------------------------------------ */
#define ZIMAGE64_MAGIC_V0 0x14000008
#define ZIMAGE64_MAGIC_V1 0x644d5241 /* "ARM\x64" */
/* linux/Documentation/arm64/booting.txt */
struct zimage64_hdr {
uint32_t magic0;
uint32_t res0;
uint64_t text_offset; /* Image load offset */
uint64_t res1;
uint64_t res2;
/* zImage V1 only from here */
uint64_t res3;
uint64_t res4;
uint64_t res5;
uint32_t magic1;
uint32_t res6;
};
static int xc_dom_probe_zimage64_kernel(struct xc_dom_image *dom)
{
struct zimage64_hdr *zimage;
if ( dom->kernel_blob == NULL )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: no kernel image loaded", __FUNCTION__);
return -EINVAL;
}
if ( dom->kernel_size < sizeof(*zimage) )
{
xc_dom_printf(dom->xch, "%s: kernel image too small", __FUNCTION__);
return -EINVAL;
}
zimage = dom->kernel_blob;
if ( zimage->magic0 != ZIMAGE64_MAGIC_V0 &&
zimage->magic1 != ZIMAGE64_MAGIC_V1 )
{
xc_dom_printf(dom->xch, "%s: kernel is not an arm64 Image", __FUNCTION__);
return -EINVAL;
}
return 0;
}
static int xc_dom_parse_zimage64_kernel(struct xc_dom_image *dom)
{
struct zimage64_hdr *zimage;
uint64_t v_start, v_end;
uint64_t rambase = dom->rambase_pfn << XC_PAGE_SHIFT;
DOMPRINTF_CALLED(dom->xch);
zimage = dom->kernel_blob;
if ( zimage->text_offset > UINT64_MAX - rambase )
{
DOMPRINTF("%s: kernel text offset is too large\n", __FUNCTION__);
return -EINVAL;
}
v_start = rambase + zimage->text_offset;
if ( dom->kernel_size > UINT64_MAX - v_start )
{
DOMPRINTF("%s: kernel is too large\n", __FUNCTION__);
return -EINVAL;
}
v_end = v_start + dom->kernel_size;
dom->kernel_seg.vstart = v_start;
dom->kernel_seg.vend = v_end;
/* Call the kernel at offset 0 */
dom->parms.virt_entry = v_start;
dom->parms.virt_base = rambase;
dom->guest_type = "xen-3.0-aarch64";
DOMPRINTF("%s: %s: 0x%" PRIx64 " -> 0x%" PRIx64 "",
__FUNCTION__, dom->guest_type,
dom->kernel_seg.vstart, dom->kernel_seg.vend);
return 0;
}
/* ------------------------------------------------------------ */
/* Common zImage Support */
/* ------------------------------------------------------------ */
static int xc_dom_load_zimage_kernel(struct xc_dom_image *dom)
{
void *dst;
DOMPRINTF_CALLED(dom->xch);
dst = xc_dom_seg_to_ptr(dom, &dom->kernel_seg);
if ( dst == NULL )
{
DOMPRINTF("%s: xc_dom_seg_to_ptr(dom, &dom->kernel_seg) => NULL",
__func__);
return -1;
}
DOMPRINTF("%s: kernel seg %#"PRIx64"-%#"PRIx64,
__func__, dom->kernel_seg.vstart, dom->kernel_seg.vend);
DOMPRINTF("%s: copy %zd bytes from blob %p to dst %p",
__func__, dom->kernel_size, dom->kernel_blob, dst);
memcpy(dst, dom->kernel_blob, dom->kernel_size);
return 0;
}
static struct xc_dom_loader zimage32_loader = {
.name = "Linux zImage (ARM32)",
.probe = xc_dom_probe_zimage32_kernel,
.parser = xc_dom_parse_zimage32_kernel,
.loader = xc_dom_load_zimage_kernel,
};
static struct xc_dom_loader zimage64_loader = {
.name = "Linux zImage (ARM64)",
.probe = xc_dom_probe_zimage64_kernel,
.parser = xc_dom_parse_zimage64_kernel,
.loader = xc_dom_load_zimage_kernel,
};
static void __init register_loader(void)
{
xc_dom_register_loader(&zimage32_loader);
xc_dom_register_loader(&zimage64_loader);
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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