License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-17 06:20:36 +08:00
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/*
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* Architecture-specific trap handling.
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*
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* Copyright (C) 1998-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*
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* 05/12/00 grao <goutham.rao@intel.com> : added isr in siginfo for SIGFPE
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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2017-02-09 01:51:30 +08:00
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#include <linux/sched/signal.h>
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2017-02-09 01:51:35 +08:00
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#include <linux/sched/debug.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/tty.h>
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#include <linux/vt_kern.h> /* For unblank_screen() */
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2016-07-24 02:01:45 +08:00
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#include <linux/export.h>
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#include <linux/extable.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/hardirq.h>
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2005-09-07 06:19:30 +08:00
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#include <linux/kprobes.h>
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2006-02-15 16:23:09 +08:00
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#include <linux/delay.h> /* for ssleep() */
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2007-05-08 15:27:03 +08:00
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#include <linux/kdebug.h>
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2016-09-20 06:28:25 +08:00
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#include <linux/uaccess.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/fpswa.h>
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#include <asm/intrinsics.h>
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#include <asm/processor.h>
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2016-09-20 06:28:25 +08:00
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#include <asm/exception.h>
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2012-03-29 01:30:02 +08:00
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#include <asm/setup.h>
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2005-04-17 06:20:36 +08:00
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fpswa_interface_t *fpswa_interface;
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EXPORT_SYMBOL(fpswa_interface);
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void __init
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trap_init (void)
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{
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if (ia64_boot_param->fpswa)
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/* FPSWA fixup: make the interface pointer a kernel virtual address: */
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fpswa_interface = __va(ia64_boot_param->fpswa);
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}
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2008-02-05 15:43:03 +08:00
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int
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2005-04-17 06:20:36 +08:00
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die (const char *str, struct pt_regs *regs, long err)
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{
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static struct {
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spinlock_t lock;
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u32 lock_owner;
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int lock_owner_depth;
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} die = {
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2007-04-16 01:21:23 +08:00
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.lock = __SPIN_LOCK_UNLOCKED(die.lock),
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.lock_owner = -1,
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.lock_owner_depth = 0
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2005-04-17 06:20:36 +08:00
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};
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static int die_counter;
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2005-07-02 14:27:00 +08:00
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int cpu = get_cpu();
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2005-04-17 06:20:36 +08:00
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2005-07-02 14:27:00 +08:00
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if (die.lock_owner != cpu) {
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2005-04-17 06:20:36 +08:00
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console_verbose();
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spin_lock_irq(&die.lock);
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2005-07-02 14:27:00 +08:00
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die.lock_owner = cpu;
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2005-04-17 06:20:36 +08:00
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die.lock_owner_depth = 0;
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bust_spinlocks(1);
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}
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2005-07-02 14:27:00 +08:00
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put_cpu();
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2005-04-17 06:20:36 +08:00
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if (++die.lock_owner_depth < 3) {
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printk("%s[%d]: %s %ld [%d]\n",
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2007-10-19 14:40:41 +08:00
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current->comm, task_pid_nr(current), str, err, ++die_counter);
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2008-02-05 15:43:03 +08:00
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if (notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV)
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!= NOTIFY_STOP)
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show_regs(regs);
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else
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regs = NULL;
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2005-04-17 06:20:36 +08:00
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} else
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printk(KERN_ERR "Recursive die() failure, output suppressed\n");
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bust_spinlocks(0);
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die.lock_owner = -1;
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2013-01-21 14:47:39 +08:00
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add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
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2005-04-17 06:20:36 +08:00
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spin_unlock_irq(&die.lock);
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2006-02-15 16:23:09 +08:00
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2008-02-05 15:43:03 +08:00
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if (!regs)
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return 1;
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2006-07-30 18:03:34 +08:00
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if (panic_on_oops)
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2006-08-14 14:24:22 +08:00
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panic("Fatal exception");
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2006-02-15 16:23:09 +08:00
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2005-04-17 06:20:36 +08:00
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do_exit(SIGSEGV);
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2008-02-05 15:43:03 +08:00
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return 0;
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2005-04-17 06:20:36 +08:00
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}
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2008-02-05 15:43:03 +08:00
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int
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2005-04-17 06:20:36 +08:00
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die_if_kernel (char *str, struct pt_regs *regs, long err)
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{
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if (!user_mode(regs))
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2008-02-05 15:43:03 +08:00
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return die(str, regs, err);
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return 0;
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2005-04-17 06:20:36 +08:00
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}
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void
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2005-09-07 06:19:30 +08:00
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__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
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2005-04-17 06:20:36 +08:00
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{
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siginfo_t siginfo;
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int sig, code;
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/* SIGILL, SIGFPE, SIGSEGV, and SIGBUS want these field initialized: */
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siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
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siginfo.si_imm = break_num;
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siginfo.si_flags = 0; /* clear __ISR_VALID */
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siginfo.si_isr = 0;
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switch (break_num) {
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case 0: /* unknown error (used by GCC for __builtin_abort()) */
|
2005-06-23 15:09:27 +08:00
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if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
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== NOTIFY_STOP)
|
2005-06-23 15:09:27 +08:00
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return;
|
2008-02-05 15:43:03 +08:00
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if (die_if_kernel("bugcheck!", regs, break_num))
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return;
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2005-04-17 06:20:36 +08:00
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sig = SIGILL; code = ILL_ILLOPC;
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break;
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case 1: /* integer divide by zero */
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sig = SIGFPE; code = FPE_INTDIV;
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break;
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case 2: /* integer overflow */
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sig = SIGFPE; code = FPE_INTOVF;
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break;
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case 3: /* range check/bounds check */
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sig = SIGFPE; code = FPE_FLTSUB;
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break;
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case 4: /* null pointer dereference */
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sig = SIGSEGV; code = SEGV_MAPERR;
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break;
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case 5: /* misaligned data */
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sig = SIGSEGV; code = BUS_ADRALN;
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break;
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case 6: /* decimal overflow */
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sig = SIGFPE; code = __FPE_DECOVF;
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break;
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case 7: /* decimal divide by zero */
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sig = SIGFPE; code = __FPE_DECDIV;
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break;
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case 8: /* packed decimal error */
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sig = SIGFPE; code = __FPE_DECERR;
|
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break;
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case 9: /* invalid ASCII digit */
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sig = SIGFPE; code = __FPE_INVASC;
|
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break;
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|
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case 10: /* invalid decimal digit */
|
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sig = SIGFPE; code = __FPE_INVDEC;
|
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break;
|
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case 11: /* paragraph stack overflow */
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sig = SIGSEGV; code = __SEGV_PSTKOVF;
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break;
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case 0x3f000 ... 0x3ffff: /* bundle-update in progress */
|
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sig = SIGILL; code = __ILL_BNDMOD;
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break;
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default:
|
2008-02-05 15:43:03 +08:00
|
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|
if ((break_num < 0x40000 || break_num > 0x100000)
|
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|
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&& die_if_kernel("Bad break", regs, break_num))
|
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return;
|
2005-04-17 06:20:36 +08:00
|
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|
|
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|
|
|
if (break_num < 0x80000) {
|
|
|
|
|
sig = SIGILL; code = __ILL_BREAK;
|
|
|
|
|
} else {
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
|
|
|
if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP)
|
|
|
|
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== NOTIFY_STOP)
|
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
sig = SIGTRAP; code = TRAP_BRKPT;
|
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|
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}
|
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|
|
}
|
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|
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siginfo.si_signo = sig;
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|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_code = code;
|
|
|
|
|
force_sig_info(sig, &siginfo, current);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* disabled_fph_fault() is called when a user-level process attempts to access f32..f127
|
|
|
|
|
* and it doesn't own the fp-high register partition. When this happens, we save the
|
|
|
|
|
* current fph partition in the task_struct of the fpu-owner (if necessary) and then load
|
|
|
|
|
* the fp-high partition of the current task (if necessary). Note that the kernel has
|
|
|
|
|
* access to fph by the time we get here, as the IVT's "Disabled FP-Register" handler takes
|
|
|
|
|
* care of clearing psr.dfh.
|
|
|
|
|
*/
|
|
|
|
|
static inline void
|
|
|
|
|
disabled_fph_fault (struct pt_regs *regs)
|
|
|
|
|
{
|
|
|
|
|
struct ia64_psr *psr = ia64_psr(regs);
|
|
|
|
|
|
|
|
|
|
/* first, grant user-level access to fph partition: */
|
|
|
|
|
psr->dfh = 0;
|
2005-06-09 06:50:20 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Make sure that no other task gets in on this processor
|
|
|
|
|
* while we're claiming the FPU
|
|
|
|
|
*/
|
|
|
|
|
preempt_disable();
|
2005-04-17 06:20:36 +08:00
|
|
|
#ifndef CONFIG_SMP
|
|
|
|
|
{
|
|
|
|
|
struct task_struct *fpu_owner
|
|
|
|
|
= (struct task_struct *)ia64_get_kr(IA64_KR_FPU_OWNER);
|
|
|
|
|
|
2005-06-09 06:50:20 +08:00
|
|
|
if (ia64_is_local_fpu_owner(current)) {
|
|
|
|
|
preempt_enable_no_resched();
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
2005-06-09 06:50:20 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
if (fpu_owner)
|
|
|
|
|
ia64_flush_fph(fpu_owner);
|
|
|
|
|
}
|
|
|
|
|
#endif /* !CONFIG_SMP */
|
|
|
|
|
ia64_set_local_fpu_owner(current);
|
|
|
|
|
if ((current->thread.flags & IA64_THREAD_FPH_VALID) != 0) {
|
|
|
|
|
__ia64_load_fpu(current->thread.fph);
|
|
|
|
|
psr->mfh = 0;
|
|
|
|
|
} else {
|
|
|
|
|
__ia64_init_fpu();
|
|
|
|
|
/*
|
|
|
|
|
* Set mfh because the state in thread.fph does not match the state in
|
|
|
|
|
* the fph partition.
|
|
|
|
|
*/
|
|
|
|
|
psr->mfh = 1;
|
|
|
|
|
}
|
2005-06-09 06:50:20 +08:00
|
|
|
preempt_enable_no_resched();
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int
|
|
|
|
|
fp_emulate (int fp_fault, void *bundle, long *ipsr, long *fpsr, long *isr, long *pr, long *ifs,
|
|
|
|
|
struct pt_regs *regs)
|
|
|
|
|
{
|
|
|
|
|
fp_state_t fp_state;
|
|
|
|
|
fpswa_ret_t ret;
|
|
|
|
|
|
|
|
|
|
if (!fpswa_interface)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
memset(&fp_state, 0, sizeof(fp_state_t));
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* compute fp_state. only FP registers f6 - f11 are used by the
|
|
|
|
|
* kernel, so set those bits in the mask and set the low volatile
|
|
|
|
|
* pointer to point to these registers.
|
|
|
|
|
*/
|
|
|
|
|
fp_state.bitmask_low64 = 0xfc0; /* bit6..bit11 */
|
|
|
|
|
|
|
|
|
|
fp_state.fp_state_low_volatile = (fp_state_low_volatile_t *) ®s->f6;
|
|
|
|
|
/*
|
|
|
|
|
* unsigned long (*EFI_FPSWA) (
|
|
|
|
|
* unsigned long trap_type,
|
|
|
|
|
* void *Bundle,
|
|
|
|
|
* unsigned long *pipsr,
|
|
|
|
|
* unsigned long *pfsr,
|
|
|
|
|
* unsigned long *pisr,
|
|
|
|
|
* unsigned long *ppreds,
|
|
|
|
|
* unsigned long *pifs,
|
|
|
|
|
* void *fp_state);
|
|
|
|
|
*/
|
|
|
|
|
ret = (*fpswa_interface->fpswa)((unsigned long) fp_fault, bundle,
|
|
|
|
|
(unsigned long *) ipsr, (unsigned long *) fpsr,
|
|
|
|
|
(unsigned long *) isr, (unsigned long *) pr,
|
|
|
|
|
(unsigned long *) ifs, &fp_state);
|
|
|
|
|
|
|
|
|
|
return ret.status;
|
|
|
|
|
}
|
|
|
|
|
|
2006-11-22 23:55:08 +08:00
|
|
|
struct fpu_swa_msg {
|
|
|
|
|
unsigned long count;
|
|
|
|
|
unsigned long time;
|
|
|
|
|
};
|
|
|
|
|
static DEFINE_PER_CPU(struct fpu_swa_msg, cpulast);
|
|
|
|
|
DECLARE_PER_CPU(struct fpu_swa_msg, cpulast);
|
|
|
|
|
static struct fpu_swa_msg last __cacheline_aligned;
|
|
|
|
|
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
|
* Handle floating-point assist faults and traps.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
|
|
|
|
|
{
|
|
|
|
|
long exception, bundle[2];
|
|
|
|
|
unsigned long fault_ip;
|
|
|
|
|
struct siginfo siginfo;
|
|
|
|
|
|
|
|
|
|
fault_ip = regs->cr_iip;
|
|
|
|
|
if (!fp_fault && (ia64_psr(regs)->ri == 0))
|
|
|
|
|
fault_ip -= 16;
|
|
|
|
|
if (copy_from_user(bundle, (void __user *) fault_ip, sizeof(bundle)))
|
|
|
|
|
return -1;
|
|
|
|
|
|
2006-11-22 23:55:08 +08:00
|
|
|
if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT)) {
|
|
|
|
|
unsigned long count, current_jiffies = jiffies;
|
ia64: Replace __get_cpu_var uses
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-08-18 01:30:47 +08:00
|
|
|
struct fpu_swa_msg *cp = this_cpu_ptr(&cpulast);
|
2006-11-22 23:55:08 +08:00
|
|
|
|
|
|
|
|
if (unlikely(current_jiffies > cp->time))
|
|
|
|
|
cp->count = 0;
|
|
|
|
|
if (unlikely(cp->count < 5)) {
|
|
|
|
|
cp->count++;
|
|
|
|
|
cp->time = current_jiffies + 5 * HZ;
|
|
|
|
|
|
|
|
|
|
/* minimize races by grabbing a copy of count BEFORE checking last.time. */
|
|
|
|
|
count = last.count;
|
|
|
|
|
barrier();
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Lower 4 bits are used as a count. Upper bits are a sequence
|
|
|
|
|
* number that is updated when count is reset. The cmpxchg will
|
|
|
|
|
* fail is seqno has changed. This minimizes mutiple cpus
|
2007-05-12 05:55:43 +08:00
|
|
|
* resetting the count.
|
2006-11-22 23:55:08 +08:00
|
|
|
*/
|
|
|
|
|
if (current_jiffies > last.time)
|
|
|
|
|
(void) cmpxchg_acq(&last.count, count, 16 + (count & ~15));
|
|
|
|
|
|
|
|
|
|
/* used fetchadd to atomically update the count */
|
|
|
|
|
if ((last.count & 15) < 5 && (ia64_fetchadd(1, &last.count, acq) & 15) < 5) {
|
|
|
|
|
last.time = current_jiffies + 5 * HZ;
|
|
|
|
|
printk(KERN_WARNING
|
|
|
|
|
"%s(%d): floating-point assist fault at ip %016lx, isr %016lx\n",
|
2007-10-19 14:40:41 +08:00
|
|
|
current->comm, task_pid_nr(current), regs->cr_iip + ia64_psr(regs)->ri, isr);
|
2006-11-22 23:55:08 +08:00
|
|
|
}
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
exception = fp_emulate(fp_fault, bundle, ®s->cr_ipsr, ®s->ar_fpsr, &isr, ®s->pr,
|
|
|
|
|
®s->cr_ifs, regs);
|
|
|
|
|
if (fp_fault) {
|
|
|
|
|
if (exception == 0) {
|
|
|
|
|
/* emulation was successful */
|
|
|
|
|
ia64_increment_ip(regs);
|
|
|
|
|
} else if (exception == -1) {
|
|
|
|
|
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
|
|
|
|
|
return -1;
|
|
|
|
|
} else {
|
|
|
|
|
/* is next instruction a trap? */
|
|
|
|
|
if (exception & 2) {
|
|
|
|
|
ia64_increment_ip(regs);
|
|
|
|
|
}
|
|
|
|
|
siginfo.si_signo = SIGFPE;
|
|
|
|
|
siginfo.si_errno = 0;
|
2017-07-17 08:35:35 +08:00
|
|
|
siginfo.si_code = FPE_FIXME; /* default code */
|
2005-04-17 06:20:36 +08:00
|
|
|
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
|
|
|
|
|
if (isr & 0x11) {
|
|
|
|
|
siginfo.si_code = FPE_FLTINV;
|
|
|
|
|
} else if (isr & 0x22) {
|
|
|
|
|
/* denormal operand gets the same si_code as underflow
|
|
|
|
|
* see arch/i386/kernel/traps.c:math_error() */
|
|
|
|
|
siginfo.si_code = FPE_FLTUND;
|
|
|
|
|
} else if (isr & 0x44) {
|
|
|
|
|
siginfo.si_code = FPE_FLTDIV;
|
|
|
|
|
}
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_imm = 0;
|
|
|
|
|
force_sig_info(SIGFPE, &siginfo, current);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (exception == -1) {
|
|
|
|
|
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
|
|
|
|
|
return -1;
|
|
|
|
|
} else if (exception != 0) {
|
|
|
|
|
/* raise exception */
|
|
|
|
|
siginfo.si_signo = SIGFPE;
|
|
|
|
|
siginfo.si_errno = 0;
|
2017-07-17 08:35:35 +08:00
|
|
|
siginfo.si_code = FPE_FIXME; /* default code */
|
2005-04-17 06:20:36 +08:00
|
|
|
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
|
|
|
|
|
if (isr & 0x880) {
|
|
|
|
|
siginfo.si_code = FPE_FLTOVF;
|
|
|
|
|
} else if (isr & 0x1100) {
|
|
|
|
|
siginfo.si_code = FPE_FLTUND;
|
|
|
|
|
} else if (isr & 0x2200) {
|
|
|
|
|
siginfo.si_code = FPE_FLTRES;
|
|
|
|
|
}
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_imm = 0;
|
|
|
|
|
force_sig_info(SIGFPE, &siginfo, current);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
struct illegal_op_return {
|
|
|
|
|
unsigned long fkt, arg1, arg2, arg3;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct illegal_op_return
|
|
|
|
|
ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
|
|
|
|
|
long arg4, long arg5, long arg6, long arg7,
|
|
|
|
|
struct pt_regs regs)
|
|
|
|
|
{
|
|
|
|
|
struct illegal_op_return rv;
|
|
|
|
|
struct siginfo si;
|
|
|
|
|
char buf[128];
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_IA64_BRL_EMU
|
|
|
|
|
{
|
|
|
|
|
extern struct illegal_op_return ia64_emulate_brl (struct pt_regs *, unsigned long);
|
|
|
|
|
|
|
|
|
|
rv = ia64_emulate_brl(®s, ec);
|
|
|
|
|
if (rv.fkt != (unsigned long) -1)
|
|
|
|
|
return rv;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
sprintf(buf, "IA-64 Illegal operation fault");
|
2008-02-05 15:43:03 +08:00
|
|
|
rv.fkt = 0;
|
|
|
|
|
if (die_if_kernel(buf, ®s, 0))
|
|
|
|
|
return rv;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
memset(&si, 0, sizeof(si));
|
|
|
|
|
si.si_signo = SIGILL;
|
|
|
|
|
si.si_code = ILL_ILLOPC;
|
|
|
|
|
si.si_addr = (void __user *) (regs.cr_iip + ia64_psr(®s)->ri);
|
|
|
|
|
force_sig_info(SIGILL, &si, current);
|
|
|
|
|
return rv;
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-07 06:19:30 +08:00
|
|
|
void __kprobes
|
2005-04-17 06:20:36 +08:00
|
|
|
ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
|
|
|
|
|
unsigned long iim, unsigned long itir, long arg5, long arg6,
|
|
|
|
|
long arg7, struct pt_regs regs)
|
|
|
|
|
{
|
|
|
|
|
unsigned long code, error = isr, iip;
|
|
|
|
|
struct siginfo siginfo;
|
|
|
|
|
char buf[128];
|
|
|
|
|
int result, sig;
|
|
|
|
|
static const char *reason[] = {
|
|
|
|
|
"IA-64 Illegal Operation fault",
|
|
|
|
|
"IA-64 Privileged Operation fault",
|
|
|
|
|
"IA-64 Privileged Register fault",
|
|
|
|
|
"IA-64 Reserved Register/Field fault",
|
|
|
|
|
"Disabled Instruction Set Transition fault",
|
|
|
|
|
"Unknown fault 5", "Unknown fault 6", "Unknown fault 7", "Illegal Hazard fault",
|
|
|
|
|
"Unknown fault 9", "Unknown fault 10", "Unknown fault 11", "Unknown fault 12",
|
|
|
|
|
"Unknown fault 13", "Unknown fault 14", "Unknown fault 15"
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
if ((isr & IA64_ISR_NA) && ((isr & IA64_ISR_CODE_MASK) == IA64_ISR_CODE_LFETCH)) {
|
|
|
|
|
/*
|
|
|
|
|
* This fault was due to lfetch.fault, set "ed" bit in the psr to cancel
|
|
|
|
|
* the lfetch.
|
|
|
|
|
*/
|
|
|
|
|
ia64_psr(®s)->ed = 1;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
iip = regs.cr_iip + ia64_psr(®s)->ri;
|
|
|
|
|
|
|
|
|
|
switch (vector) {
|
|
|
|
|
case 24: /* General Exception */
|
|
|
|
|
code = (isr >> 4) & 0xf;
|
|
|
|
|
sprintf(buf, "General Exception: %s%s", reason[code],
|
|
|
|
|
(code == 3) ? ((isr & (1UL << 37))
|
|
|
|
|
? " (RSE access)" : " (data access)") : "");
|
|
|
|
|
if (code == 8) {
|
|
|
|
|
# ifdef CONFIG_IA64_PRINT_HAZARDS
|
|
|
|
|
printk("%s[%d]: possible hazard @ ip=%016lx (pr = %016lx)\n",
|
2007-10-19 14:40:41 +08:00
|
|
|
current->comm, task_pid_nr(current),
|
2005-04-17 06:20:36 +08:00
|
|
|
regs.cr_iip + ia64_psr(®s)->ri, regs.pr);
|
|
|
|
|
# endif
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 25: /* Disabled FP-Register */
|
|
|
|
|
if (isr & 2) {
|
|
|
|
|
disabled_fph_fault(®s);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
sprintf(buf, "Disabled FPL fault---not supposed to happen!");
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 26: /* NaT Consumption */
|
|
|
|
|
if (user_mode(®s)) {
|
|
|
|
|
void __user *addr;
|
|
|
|
|
|
|
|
|
|
if (((isr >> 4) & 0xf) == 2) {
|
|
|
|
|
/* NaT page consumption */
|
|
|
|
|
sig = SIGSEGV;
|
|
|
|
|
code = SEGV_ACCERR;
|
|
|
|
|
addr = (void __user *) ifa;
|
|
|
|
|
} else {
|
|
|
|
|
/* register NaT consumption */
|
|
|
|
|
sig = SIGILL;
|
|
|
|
|
code = ILL_ILLOPN;
|
|
|
|
|
addr = (void __user *) (regs.cr_iip
|
|
|
|
|
+ ia64_psr(®s)->ri);
|
|
|
|
|
}
|
|
|
|
|
siginfo.si_signo = sig;
|
|
|
|
|
siginfo.si_code = code;
|
|
|
|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_addr = addr;
|
|
|
|
|
siginfo.si_imm = vector;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
force_sig_info(sig, &siginfo, current);
|
|
|
|
|
return;
|
|
|
|
|
} else if (ia64_done_with_exception(®s))
|
|
|
|
|
return;
|
|
|
|
|
sprintf(buf, "NaT consumption");
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 31: /* Unsupported Data Reference */
|
|
|
|
|
if (user_mode(®s)) {
|
|
|
|
|
siginfo.si_signo = SIGILL;
|
|
|
|
|
siginfo.si_code = ILL_ILLOPN;
|
|
|
|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_addr = (void __user *) iip;
|
|
|
|
|
siginfo.si_imm = vector;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
force_sig_info(SIGILL, &siginfo, current);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
sprintf(buf, "Unsupported data reference");
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 29: /* Debug */
|
|
|
|
|
case 35: /* Taken Branch Trap */
|
|
|
|
|
case 36: /* Single Step Trap */
|
|
|
|
|
if (fsys_mode(current, ®s)) {
|
|
|
|
|
extern char __kernel_syscall_via_break[];
|
|
|
|
|
/*
|
2005-12-30 18:27:01 +08:00
|
|
|
* Got a trap in fsys-mode: Taken Branch Trap
|
|
|
|
|
* and Single Step trap need special handling;
|
|
|
|
|
* Debug trap is ignored (we disable it here
|
|
|
|
|
* and re-enable it in the lower-privilege trap).
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
|
if (unlikely(vector == 29)) {
|
2005-12-30 18:27:01 +08:00
|
|
|
set_thread_flag(TIF_DB_DISABLED);
|
|
|
|
|
ia64_psr(®s)->db = 0;
|
|
|
|
|
ia64_psr(®s)->lp = 1;
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
/* re-do the system call via break 0x100000: */
|
|
|
|
|
regs.cr_iip = (unsigned long) __kernel_syscall_via_break;
|
|
|
|
|
ia64_psr(®s)->ri = 0;
|
|
|
|
|
ia64_psr(®s)->cpl = 3;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
switch (vector) {
|
2016-05-04 19:17:49 +08:00
|
|
|
default:
|
2005-04-17 06:20:36 +08:00
|
|
|
case 29:
|
|
|
|
|
siginfo.si_code = TRAP_HWBKPT;
|
|
|
|
|
#ifdef CONFIG_ITANIUM
|
|
|
|
|
/*
|
|
|
|
|
* Erratum 10 (IFA may contain incorrect address) now has
|
|
|
|
|
* "NoFix" status. There are no plans for fixing this.
|
|
|
|
|
*/
|
|
|
|
|
if (ia64_psr(®s)->is == 0)
|
|
|
|
|
ifa = regs.cr_iip;
|
|
|
|
|
#endif
|
|
|
|
|
break;
|
|
|
|
|
case 35: siginfo.si_code = TRAP_BRANCH; ifa = 0; break;
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
|
|
|
case 36: siginfo.si_code = TRAP_TRACE; ifa = 0; break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
|
|
|
if (notify_die(DIE_FAULT, "ia64_fault", ®s, vector, siginfo.si_code, SIGTRAP)
|
|
|
|
|
== NOTIFY_STOP)
|
|
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
siginfo.si_signo = SIGTRAP;
|
|
|
|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_addr = (void __user *) ifa;
|
|
|
|
|
siginfo.si_imm = 0;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
force_sig_info(SIGTRAP, &siginfo, current);
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case 32: /* fp fault */
|
|
|
|
|
case 33: /* fp trap */
|
|
|
|
|
result = handle_fpu_swa((vector == 32) ? 1 : 0, ®s, isr);
|
|
|
|
|
if ((result < 0) || (current->thread.flags & IA64_THREAD_FPEMU_SIGFPE)) {
|
|
|
|
|
siginfo.si_signo = SIGFPE;
|
|
|
|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_code = FPE_FLTINV;
|
|
|
|
|
siginfo.si_addr = (void __user *) iip;
|
|
|
|
|
siginfo.si_flags = __ISR_VALID;
|
|
|
|
|
siginfo.si_isr = isr;
|
|
|
|
|
siginfo.si_imm = 0;
|
|
|
|
|
force_sig_info(SIGFPE, &siginfo, current);
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case 34:
|
|
|
|
|
if (isr & 0x2) {
|
|
|
|
|
/* Lower-Privilege Transfer Trap */
|
2005-12-30 18:27:01 +08:00
|
|
|
|
|
|
|
|
/* If we disabled debug traps during an fsyscall,
|
|
|
|
|
* re-enable them here.
|
|
|
|
|
*/
|
|
|
|
|
if (test_thread_flag(TIF_DB_DISABLED)) {
|
|
|
|
|
clear_thread_flag(TIF_DB_DISABLED);
|
|
|
|
|
ia64_psr(®s)->db = 1;
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2005-12-30 18:27:01 +08:00
|
|
|
* Just clear PSR.lp and then return immediately:
|
|
|
|
|
* all the interesting work (e.g., signal delivery)
|
|
|
|
|
* is done in the kernel exit path.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
|
ia64_psr(®s)->lp = 0;
|
|
|
|
|
return;
|
|
|
|
|
} else {
|
|
|
|
|
/* Unimplemented Instr. Address Trap */
|
|
|
|
|
if (user_mode(®s)) {
|
|
|
|
|
siginfo.si_signo = SIGILL;
|
|
|
|
|
siginfo.si_code = ILL_BADIADDR;
|
|
|
|
|
siginfo.si_errno = 0;
|
|
|
|
|
siginfo.si_flags = 0;
|
|
|
|
|
siginfo.si_isr = 0;
|
|
|
|
|
siginfo.si_imm = 0;
|
|
|
|
|
siginfo.si_addr = (void __user *) iip;
|
|
|
|
|
force_sig_info(SIGILL, &siginfo, current);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
sprintf(buf, "Unimplemented Instruction Address fault");
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 45:
|
|
|
|
|
printk(KERN_ERR "Unexpected IA-32 exception (Trap 45)\n");
|
|
|
|
|
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx\n",
|
|
|
|
|
iip, ifa, isr);
|
|
|
|
|
force_sig(SIGSEGV, current);
|
2013-05-27 14:30:29 +08:00
|
|
|
return;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
case 46:
|
|
|
|
|
printk(KERN_ERR "Unexpected IA-32 intercept trap (Trap 46)\n");
|
|
|
|
|
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx, iim - 0x%lx\n",
|
|
|
|
|
iip, ifa, isr, iim);
|
|
|
|
|
force_sig(SIGSEGV, current);
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case 47:
|
|
|
|
|
sprintf(buf, "IA-32 Interruption Fault (int 0x%lx)", isr >> 16);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
sprintf(buf, "Fault %lu", vector);
|
|
|
|
|
break;
|
|
|
|
|
}
|
2008-02-05 15:43:03 +08:00
|
|
|
if (!die_if_kernel(buf, ®s, error))
|
|
|
|
|
force_sig(SIGILL, current);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|