| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1187331349.28497.9.camel@caritas-dev.intel.com>
Date: Fri, 17 Aug 2007 14:15:49 +0800
From: "Huang, Ying" <ying.huang@...el.com>
To: Pavel Machek <pavel@....cz>
Cc: david@...g.hm, nigel@...el.suspend2.net,
Kexec Mailing List <kexec@...ts.infradead.org>,
linux-kernel@...r.kernel.org,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-pm@...ts.linux-foundation.org,
Jeremy Maitin-Shepard <jbms@....edu>
Subject: Re: [linux-pm] Re: [PATH 1/1] Kexec jump - v2 - kexec jump
Hi, Pavel,
On Thu, 2007-08-16 at 12:26 +0200, Pavel Machek wrote:
> Ping... is there some next version?
>
> I'm stuck at the tools side currently. kexec-1.101 just won't load the
> kernel properly, and kexec-testing from git does not know -j option. I
> tried hand-patching it, but got lots of scary rejects.
>
> Is there chance for a patch against kexec-testing?
I have some other work to do recently. So the next version will delay
for some while. :(
But now, I have a patch against kexec-tools-testing.
Best Regards,
Huang Ying
Index: kexec-tools/kexec/arch/i386/crashdump-x86.c
===================================================================
--- kexec-tools.orig/kexec/arch/i386/crashdump-x86.c 2007-08-17 13:48:51.000000000 +0800
+++ kexec-tools/kexec/arch/i386/crashdump-x86.c 2007-08-17 13:49:50.000000000 +0800
@@ -428,6 +428,29 @@
return 0;
}
+/* Adds the kexec_backup= command line parameter to command line. */
+static int cmdline_add_backup(char *cmdline, unsigned long addr)
+{
+ int cmdlen, len, align = 1024;
+ char str[30], *ptr;
+
+ /* Passing in kexec_backup=xxxK format. Saves space required
+ * in cmdline. Ensure 1K alignment*/
+ if (addr%align)
+ return -1;
+ addr = addr/align;
+ ptr = str;
+ strcpy(str, " kexec_backup=");
+ ptr += strlen(str);
+ ultoa(addr, ptr);
+ strcat(str, "K");
+ len = strlen(str);
+ cmdlen = strlen(cmdline) + len;
+ if (cmdlen > (COMMAND_LINE_SIZE - 1))
+ die("Command line overflow\n");
+ strcat(cmdline, str);
+ return 0;
+}
/*
* This routine is specific to i386 architecture to maintain the
@@ -575,6 +598,7 @@
return -1;
cmdline_add_memmap(mod_cmdline, memmap_p);
cmdline_add_elfcorehdr(mod_cmdline, elfcorehdr);
+ cmdline_add_backup(mod_cmdline, info->backup_start);
return 0;
}
Index: kexec-tools/kexec/kexec-syscall.h
===================================================================
--- kexec-tools.orig/kexec/kexec-syscall.h 2007-08-17 13:48:51.000000000 +0800
+++ kexec-tools/kexec/kexec-syscall.h 2007-08-17 13:49:50.000000000 +0800
@@ -21,6 +21,7 @@
#define LINUX_REBOOT_CMD_KEXEC_OLD 0x81726354
#define LINUX_REBOOT_CMD_KEXEC_OLD2 0x18263645
#define LINUX_REBOOT_CMD_KEXEC 0x45584543
+#define LINUX_REBOOT_CMD_KJUMP 0x3928A5FD
#ifdef __i386__
#define __NR_kexec_load 283
@@ -63,6 +64,10 @@
return (long) syscall(__NR_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_KEXEC, 0);
}
+static inline long kexec_jump(void)
+{
+ return (long) syscall(__NR_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_KJUMP, 0);
+}
#define KEXEC_ON_CRASH 0x00000001
#define KEXEC_ARCH_MASK 0xffff0000
Index: kexec-tools/kexec/kexec.c
===================================================================
--- kexec-tools.orig/kexec/kexec.c 2007-08-17 13:48:51.000000000 +0800
+++ kexec-tools/kexec/kexec.c 2007-08-17 13:49:50.000000000 +0800
@@ -716,6 +716,17 @@
return -1;
}
+/*
+ * Jump to the new kernel
+ */
+static int my_jump(void)
+{
+ int result;
+
+ result = kexec_jump();
+ return result;
+}
+
static void version(void)
{
printf(PACKAGE " " VERSION " released " RELEASE_DATE "\n");
@@ -743,6 +754,7 @@
" If capture kernel is being unloaded\n"
" specify -p with -u.\n"
" -e, --exec Execute a currently loaded kernel.\n"
+ " -j, --jump Jump to a currently loaded kernel or jump back to the previous kernel.\n"
" -t, --type=TYPE Specify the new kernel is of this type.\n"
" --mem-min=<addr> Specify the lowest memory address to\n"
" load code into.\n"
@@ -803,6 +815,7 @@
{
int do_load = 1;
int do_exec = 0;
+ int do_jump = 0;
int do_shutdown = 1;
int do_sync = 1;
int do_ifdown = 0;
@@ -858,6 +871,14 @@
do_ifdown = 1;
do_exec = 1;
break;
+ case OPT_JUMP:
+ do_load = 0;
+ do_shutdown = 0;
+ do_sync = 1;
+ do_ifdown = 0;
+ do_exec = 0;
+ do_jump = 1;
+ break;
case OPT_TYPE:
type = optarg;
break;
@@ -949,6 +970,9 @@
if ((result == 0) && do_exec) {
result = my_exec();
}
+ if ((result == 0) && do_jump) {
+ result = my_jump();
+ }
fflush(stdout);
fflush(stderr);
Index: kexec-tools/kexec/kexec.h
===================================================================
--- kexec-tools.orig/kexec/kexec.h 2007-08-17 13:48:51.000000000 +0800
+++ kexec-tools/kexec/kexec.h 2007-08-17 13:49:50.000000000 +0800
@@ -156,6 +156,7 @@
#define OPT_FORCE 'f'
#define OPT_NOIFDOWN 'x'
#define OPT_EXEC 'e'
+#define OPT_JUMP 'j'
#define OPT_LOAD 'l'
#define OPT_UNLOAD 'u'
#define OPT_TYPE 't'
@@ -172,13 +173,14 @@
{ "load", 0, 0, OPT_LOAD }, \
{ "unload", 0, 0, OPT_UNLOAD }, \
{ "exec", 0, 0, OPT_EXEC }, \
+ { "jump", 0, 0, OPT_JUMP }, \
{ "type", 1, 0, OPT_TYPE }, \
{ "load-panic", 0, 0, OPT_PANIC }, \
{ "mem-min", 1, 0, OPT_MEM_MIN }, \
{ "mem-max", 1, 0, OPT_MEM_MAX }, \
{ "reuseinitrd", 0, 0, OPT_REUSE_INITRD }, \
-#define KEXEC_OPT_STR "hvdfxluet:p"
+#define KEXEC_OPT_STR "hvdfxluejt:p"
extern void die(char *fmt, ...);
extern void *xmalloc(size_t size);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists