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 17:07:57 +03:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-17 02:20:36 +04:00
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/*
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* Architecture-specific signal handling support.
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*
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* Copyright (C) 1999-2004 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*
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* Derived from i386 and Alpha versions.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/ptrace.h>
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2008-10-06 21:43:06 +04:00
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#include <linux/tracehook.h>
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2005-04-17 02:20:36 +04:00
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/smp.h>
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#include <linux/stddef.h>
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#include <linux/tty.h>
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#include <linux/binfmts.h>
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#include <linux/unistd.h>
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#include <linux/wait.h>
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#include <asm/intrinsics.h>
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2016-12-24 22:46:01 +03:00
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#include <linux/uaccess.h>
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2005-04-17 02:20:36 +04:00
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#include <asm/rse.h>
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#include <asm/sigcontext.h>
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#include "sigframe.h"
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#define DEBUG_SIG 0
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#define STACK_ALIGN 16 /* minimal alignment for stack pointer */
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#if _NSIG_WORDS > 1
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# define PUT_SIGSET(k,u) __copy_to_user((u)->sig, (k)->sig, sizeof(sigset_t))
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# define GET_SIGSET(k,u) __copy_from_user((k)->sig, (u)->sig, sizeof(sigset_t))
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#else
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# define PUT_SIGSET(k,u) __put_user((k)->sig[0], &(u)->sig[0])
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# define GET_SIGSET(k,u) __get_user((k)->sig[0], &(u)->sig[0])
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#endif
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static long
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restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
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{
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2005-06-22 03:19:20 +04:00
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unsigned long ip, flags, nat, um, cfm, rsc;
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2005-04-17 02:20:36 +04:00
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long err;
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/* Always make any pending restarted system calls return -EINTR */
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2015-02-13 02:01:14 +03:00
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current->restart_block.fn = do_no_restart_syscall;
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2005-04-17 02:20:36 +04:00
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/* restore scratch that always needs gets updated during signal delivery: */
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err = __get_user(flags, &sc->sc_flags);
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err |= __get_user(nat, &sc->sc_nat);
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err |= __get_user(ip, &sc->sc_ip); /* instruction pointer */
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err |= __get_user(cfm, &sc->sc_cfm);
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err |= __get_user(um, &sc->sc_um); /* user mask */
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2005-06-22 03:19:20 +04:00
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err |= __get_user(rsc, &sc->sc_ar_rsc);
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2005-04-17 02:20:36 +04:00
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err |= __get_user(scr->pt.ar_unat, &sc->sc_ar_unat);
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err |= __get_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr);
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err |= __get_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
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err |= __get_user(scr->pt.pr, &sc->sc_pr); /* predicates */
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err |= __get_user(scr->pt.b0, &sc->sc_br[0]); /* b0 (rp) */
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err |= __get_user(scr->pt.b6, &sc->sc_br[6]); /* b6 */
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err |= __copy_from_user(&scr->pt.r1, &sc->sc_gr[1], 8); /* r1 */
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err |= __copy_from_user(&scr->pt.r8, &sc->sc_gr[8], 4*8); /* r8-r11 */
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err |= __copy_from_user(&scr->pt.r12, &sc->sc_gr[12], 2*8); /* r12-r13 */
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err |= __copy_from_user(&scr->pt.r15, &sc->sc_gr[15], 8); /* r15 */
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scr->pt.cr_ifs = cfm | (1UL << 63);
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2005-06-22 03:19:20 +04:00
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scr->pt.ar_rsc = rsc | (3 << 2); /* force PL3 */
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2005-04-17 02:20:36 +04:00
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/* establish new instruction pointer: */
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scr->pt.cr_iip = ip & ~0x3UL;
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ia64_psr(&scr->pt)->ri = ip & 0x3;
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scr->pt.cr_ipsr = (scr->pt.cr_ipsr & ~IA64_PSR_UM) | (um & IA64_PSR_UM);
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scr->scratch_unat = ia64_put_scratch_nat_bits(&scr->pt, nat);
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if (!(flags & IA64_SC_FLAG_IN_SYSCALL)) {
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/* Restore most scratch-state only when not in syscall. */
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err |= __get_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */
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err |= __get_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */
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err |= __get_user(scr->pt.r14, &sc->sc_gr[14]); /* r14 */
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err |= __copy_from_user(&scr->pt.ar_csd, &sc->sc_ar25, 2*8); /* ar.csd & ar.ssd */
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err |= __copy_from_user(&scr->pt.r2, &sc->sc_gr[2], 2*8); /* r2-r3 */
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err |= __copy_from_user(&scr->pt.r16, &sc->sc_gr[16], 16*8); /* r16-r31 */
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}
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if ((flags & IA64_SC_FLAG_FPH_VALID) != 0) {
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struct ia64_psr *psr = ia64_psr(&scr->pt);
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2007-12-03 07:57:50 +03:00
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err |= __copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16);
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2005-04-17 02:20:36 +04:00
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psr->mfh = 0; /* drop signal handler's fph contents... */
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2005-07-01 09:53:00 +04:00
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preempt_disable();
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2005-04-17 02:20:36 +04:00
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if (psr->dfh)
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ia64_drop_fpu(current);
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else {
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/* We already own the local fph, otherwise psr->dfh wouldn't be 0. */
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__ia64_load_fpu(current->thread.fph);
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ia64_set_local_fpu_owner(current);
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}
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2005-07-01 09:53:00 +04:00
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preempt_enable();
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2005-04-17 02:20:36 +04:00
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}
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return err;
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}
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long
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ia64_rt_sigreturn (struct sigscratch *scr)
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{
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extern char ia64_strace_leave_kernel, ia64_leave_kernel;
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struct sigcontext __user *sc;
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sigset_t set;
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long retval;
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sc = &((struct sigframe __user *) (scr->pt.r12 + 16))->sc;
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/*
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* When we return to the previously executing context, r8 and r10 have already
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* been setup the way we want them. Indeed, if the signal wasn't delivered while
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* in a system call, we must not touch r8 or r10 as otherwise user-level state
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* could be corrupted.
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*/
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retval = (long) &ia64_leave_kernel;
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2005-04-06 04:47:00 +04:00
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if (test_thread_flag(TIF_SYSCALL_TRACE)
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|| test_thread_flag(TIF_SYSCALL_AUDIT))
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2005-04-17 02:20:36 +04:00
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/*
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* strace expects to be notified after sigreturn returns even though the
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* context to which we return may not be in the middle of a syscall.
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* Thus, the return-value that strace displays for sigreturn is
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* meaningless.
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*/
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retval = (long) &ia64_strace_leave_kernel;
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Remove 'type' argument from access_ok() function
Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old racy i386-only code to walk page tables by hand.
It existed because the original 80386 would not honor the write protect
bit when in kernel mode, so you had to do COW by hand before doing any
user access. But we haven't supported that in a long time, and these
days the 'type' argument is a purely historical artifact.
A discussion about extending 'user_access_begin()' to do the range
checking resulted this patch, because there is no way we're going to
move the old VERIFY_xyz interface to that model. And it's best done at
the end of the merge window when I've done most of my merges, so let's
just get this done once and for all.
This patch was mostly done with a sed-script, with manual fix-ups for
the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form.
There were a couple of notable cases:
- csky still had the old "verify_area()" name as an alias.
- the iter_iov code had magical hardcoded knowledge of the actual
values of VERIFY_{READ,WRITE} (not that they mattered, since nothing
really used it)
- microblaze used the type argument for a debug printout
but other than those oddities this should be a total no-op patch.
I tried to fix up all architectures, did fairly extensive grepping for
access_ok() uses, and the changes are trivial, but I may have missed
something. Any missed conversion should be trivially fixable, though.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-04 05:57:57 +03:00
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if (!access_ok(sc, sizeof(*sc)))
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2005-04-17 02:20:36 +04:00
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goto give_sigsegv;
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if (GET_SIGSET(&set, &sc->sc_mask))
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goto give_sigsegv;
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2012-05-11 04:58:03 +04:00
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set_current_blocked(&set);
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2005-04-17 02:20:36 +04:00
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if (restore_sigcontext(sc, scr))
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goto give_sigsegv;
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#if DEBUG_SIG
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printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
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current->comm, current->pid, scr->pt.r12, scr->pt.cr_iip);
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#endif
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2012-12-23 11:52:40 +04:00
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if (restore_altstack(&sc->sc_stack))
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goto give_sigsegv;
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2005-04-17 02:20:36 +04:00
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return retval;
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give_sigsegv:
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2018-04-16 21:55:53 +03:00
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force_sig(SIGSEGV, current);
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2005-04-17 02:20:36 +04:00
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return retval;
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}
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/*
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* This does just the minimum required setup of sigcontext.
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* Specifically, it only installs data that is either not knowable at
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* the user-level or that gets modified before execution in the
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* trampoline starts. Everything else is done at the user-level.
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*/
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static long
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setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratch *scr)
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{
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unsigned long flags = 0, ifs, cfm, nat;
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2007-12-03 07:57:50 +03:00
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long err = 0;
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2005-04-17 02:20:36 +04:00
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ifs = scr->pt.cr_ifs;
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if (on_sig_stack((unsigned long) sc))
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flags |= IA64_SC_FLAG_ONSTACK;
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if ((ifs & (1UL << 63)) == 0)
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/* if cr_ifs doesn't have the valid bit set, we got here through a syscall */
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flags |= IA64_SC_FLAG_IN_SYSCALL;
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cfm = ifs & ((1UL << 38) - 1);
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ia64_flush_fph(current);
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if ((current->thread.flags & IA64_THREAD_FPH_VALID)) {
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flags |= IA64_SC_FLAG_FPH_VALID;
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2007-12-03 07:57:50 +03:00
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err = __copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16);
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2005-04-17 02:20:36 +04:00
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}
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nat = ia64_get_scratch_nat_bits(&scr->pt, scr->scratch_unat);
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2007-12-03 07:57:50 +03:00
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err |= __put_user(flags, &sc->sc_flags);
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2005-04-17 02:20:36 +04:00
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err |= __put_user(nat, &sc->sc_nat);
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err |= PUT_SIGSET(mask, &sc->sc_mask);
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err |= __put_user(cfm, &sc->sc_cfm);
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err |= __put_user(scr->pt.cr_ipsr & IA64_PSR_UM, &sc->sc_um);
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err |= __put_user(scr->pt.ar_rsc, &sc->sc_ar_rsc);
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err |= __put_user(scr->pt.ar_unat, &sc->sc_ar_unat); /* ar.unat */
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err |= __put_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr); /* ar.fpsr */
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err |= __put_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
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err |= __put_user(scr->pt.pr, &sc->sc_pr); /* predicates */
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err |= __put_user(scr->pt.b0, &sc->sc_br[0]); /* b0 (rp) */
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err |= __put_user(scr->pt.b6, &sc->sc_br[6]); /* b6 */
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err |= __copy_to_user(&sc->sc_gr[1], &scr->pt.r1, 8); /* r1 */
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err |= __copy_to_user(&sc->sc_gr[8], &scr->pt.r8, 4*8); /* r8-r11 */
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err |= __copy_to_user(&sc->sc_gr[12], &scr->pt.r12, 2*8); /* r12-r13 */
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err |= __copy_to_user(&sc->sc_gr[15], &scr->pt.r15, 8); /* r15 */
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|
|
|
err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip);
|
|
|
|
|
2007-12-14 02:58:26 +03:00
|
|
|
if (!(flags & IA64_SC_FLAG_IN_SYSCALL)) {
|
2005-04-17 02:20:36 +04:00
|
|
|
/* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */
|
|
|
|
err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */
|
|
|
|
err |= __put_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */
|
|
|
|
err |= __put_user(scr->pt.r14, &sc->sc_gr[14]); /* r14 */
|
|
|
|
err |= __copy_to_user(&sc->sc_ar25, &scr->pt.ar_csd, 2*8); /* ar.csd & ar.ssd */
|
|
|
|
err |= __copy_to_user(&sc->sc_gr[2], &scr->pt.r2, 2*8); /* r2-r3 */
|
|
|
|
err |= __copy_to_user(&sc->sc_gr[16], &scr->pt.r16, 16*8); /* r16-r31 */
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check whether the register-backing store is already on the signal stack.
|
|
|
|
*/
|
|
|
|
static inline int
|
|
|
|
rbs_on_sig_stack (unsigned long bsp)
|
|
|
|
{
|
|
|
|
return (bsp - current->sas_ss_sp < current->sas_ss_size);
|
|
|
|
}
|
|
|
|
|
|
|
|
static long
|
2013-10-08 01:07:51 +04:00
|
|
|
setup_frame(struct ksignal *ksig, sigset_t *set, struct sigscratch *scr)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
extern char __kernel_sigtramp[];
|
2005-11-03 09:40:19 +03:00
|
|
|
unsigned long tramp_addr, new_rbs = 0, new_sp;
|
2005-04-17 02:20:36 +04:00
|
|
|
struct sigframe __user *frame;
|
|
|
|
long err;
|
|
|
|
|
2005-11-03 09:40:19 +03:00
|
|
|
new_sp = scr->pt.r12;
|
2005-04-17 02:20:36 +04:00
|
|
|
tramp_addr = (unsigned long) __kernel_sigtramp;
|
2013-10-08 01:07:51 +04:00
|
|
|
if (ksig->ka.sa.sa_flags & SA_ONSTACK) {
|
2008-02-19 05:25:09 +03:00
|
|
|
int onstack = sas_ss_flags(new_sp);
|
|
|
|
|
|
|
|
if (onstack == 0) {
|
|
|
|
new_sp = current->sas_ss_sp + current->sas_ss_size;
|
|
|
|
/*
|
|
|
|
* We need to check for the register stack being on the
|
|
|
|
* signal stack separately, because it's switched
|
|
|
|
* separately (memory stack is switched in the kernel,
|
|
|
|
* register stack is switched in the signal trampoline).
|
|
|
|
*/
|
|
|
|
if (!rbs_on_sig_stack(scr->pt.ar_bspstore))
|
|
|
|
new_rbs = ALIGN(current->sas_ss_sp,
|
|
|
|
sizeof(long));
|
|
|
|
} else if (onstack == SS_ONSTACK) {
|
|
|
|
unsigned long check_sp;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we are on the alternate signal stack and would
|
|
|
|
* overflow it, don't. Return an always-bogus address
|
|
|
|
* instead so we will die with SIGSEGV.
|
|
|
|
*/
|
|
|
|
check_sp = (new_sp - sizeof(*frame)) & -STACK_ALIGN;
|
2018-04-16 21:55:06 +03:00
|
|
|
if (!likely(on_sig_stack(check_sp))) {
|
|
|
|
force_sigsegv(ksig->sig, current);
|
|
|
|
return 1;
|
|
|
|
}
|
2008-02-19 05:25:09 +03:00
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
2005-11-03 09:40:19 +03:00
|
|
|
frame = (void __user *) ((new_sp - sizeof(*frame)) & -STACK_ALIGN);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
Remove 'type' argument from access_ok() function
Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old racy i386-only code to walk page tables by hand.
It existed because the original 80386 would not honor the write protect
bit when in kernel mode, so you had to do COW by hand before doing any
user access. But we haven't supported that in a long time, and these
days the 'type' argument is a purely historical artifact.
A discussion about extending 'user_access_begin()' to do the range
checking resulted this patch, because there is no way we're going to
move the old VERIFY_xyz interface to that model. And it's best done at
the end of the merge window when I've done most of my merges, so let's
just get this done once and for all.
This patch was mostly done with a sed-script, with manual fix-ups for
the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form.
There were a couple of notable cases:
- csky still had the old "verify_area()" name as an alias.
- the iter_iov code had magical hardcoded knowledge of the actual
values of VERIFY_{READ,WRITE} (not that they mattered, since nothing
really used it)
- microblaze used the type argument for a debug printout
but other than those oddities this should be a total no-op patch.
I tried to fix up all architectures, did fairly extensive grepping for
access_ok() uses, and the changes are trivial, but I may have missed
something. Any missed conversion should be trivially fixable, though.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-04 05:57:57 +03:00
|
|
|
if (!access_ok(frame, sizeof(*frame))) {
|
2018-04-16 21:55:06 +03:00
|
|
|
force_sigsegv(ksig->sig, current);
|
|
|
|
return 1;
|
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2013-10-08 01:07:51 +04:00
|
|
|
err = __put_user(ksig->sig, &frame->arg0);
|
2005-04-17 02:20:36 +04:00
|
|
|
err |= __put_user(&frame->info, &frame->arg1);
|
|
|
|
err |= __put_user(&frame->sc, &frame->arg2);
|
|
|
|
err |= __put_user(new_rbs, &frame->sc.sc_rbs_base);
|
|
|
|
err |= __put_user(0, &frame->sc.sc_loadrs); /* initialize to zero */
|
2013-10-08 01:07:51 +04:00
|
|
|
err |= __put_user(ksig->ka.sa.sa_handler, &frame->handler);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2013-10-08 01:07:51 +04:00
|
|
|
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2012-12-23 11:52:40 +04:00
|
|
|
err |= __save_altstack(&frame->sc.sc_stack, scr->pt.r12);
|
2005-04-17 02:20:36 +04:00
|
|
|
err |= setup_sigcontext(&frame->sc, set, scr);
|
|
|
|
|
2018-04-16 21:55:06 +03:00
|
|
|
if (unlikely(err)) {
|
|
|
|
force_sigsegv(ksig->sig, current);
|
|
|
|
return 1;
|
|
|
|
}
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
scr->pt.r12 = (unsigned long) frame - 16; /* new stack pointer */
|
|
|
|
scr->pt.ar_fpsr = FPSR_DEFAULT; /* reset fpsr for signal handler */
|
|
|
|
scr->pt.cr_iip = tramp_addr;
|
|
|
|
ia64_psr(&scr->pt)->ri = 0; /* start executing in first slot */
|
|
|
|
ia64_psr(&scr->pt)->be = 0; /* force little-endian byte-order */
|
|
|
|
/*
|
|
|
|
* Force the interruption function mask to zero. This has no effect when a
|
|
|
|
* system-call got interrupted by a signal (since, in that case, scr->pt_cr_ifs is
|
|
|
|
* ignored), but it has the desirable effect of making it possible to deliver a
|
|
|
|
* signal with an incomplete register frame (which happens when a mandatory RSE
|
|
|
|
* load faults). Furthermore, it has no negative effect on the getting the user's
|
|
|
|
* dirty partition preserved, because that's governed by scr->pt.loadrs.
|
|
|
|
*/
|
|
|
|
scr->pt.cr_ifs = (1UL << 63);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note: this affects only the NaT bits of the scratch regs (the ones saved in
|
|
|
|
* pt_regs), which is exactly what we want.
|
|
|
|
*/
|
|
|
|
scr->scratch_unat = 0; /* ensure NaT bits of r12 is clear */
|
|
|
|
|
|
|
|
#if DEBUG_SIG
|
|
|
|
printk("SIG deliver (%s:%d): sig=%d sp=%lx ip=%lx handler=%p\n",
|
2013-10-08 01:07:51 +04:00
|
|
|
current->comm, current->pid, ksig->sig, scr->pt.r12, frame->sc.sc_ip, frame->handler);
|
2005-04-17 02:20:36 +04:00
|
|
|
#endif
|
2013-10-08 01:07:51 +04:00
|
|
|
return 0;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
static long
|
2013-10-08 01:07:51 +04:00
|
|
|
handle_signal (struct ksignal *ksig, struct sigscratch *scr)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2013-10-08 01:07:51 +04:00
|
|
|
int ret = setup_frame(ksig, sigmask_to_save(), scr);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2013-10-08 01:07:51 +04:00
|
|
|
if (!ret)
|
|
|
|
signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
|
2008-10-06 21:43:06 +04:00
|
|
|
|
2013-10-08 01:07:51 +04:00
|
|
|
return ret;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note that `init' is a special process: it doesn't get signals it doesn't want to
|
|
|
|
* handle. Thus you cannot kill init even with a SIGKILL even by mistake.
|
|
|
|
*/
|
2007-01-23 19:03:17 +03:00
|
|
|
void
|
|
|
|
ia64_do_signal (struct sigscratch *scr, long in_syscall)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
long restart = in_syscall;
|
|
|
|
long errno = scr->pt.r8;
|
2013-10-08 01:07:51 +04:00
|
|
|
struct ksignal ksig;
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This only loops in the rare cases of handle_signal() failing, in which case we
|
|
|
|
* need to push through a forced SIGSEGV.
|
|
|
|
*/
|
|
|
|
while (1) {
|
2013-10-08 01:07:51 +04:00
|
|
|
get_signal(&ksig);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
/*
|
2018-10-31 01:07:05 +03:00
|
|
|
* get_signal() may have run a debugger (via notify_parent())
|
2005-04-17 02:20:36 +04:00
|
|
|
* and the debugger may have modified the state (e.g., to arrange for an
|
|
|
|
* inferior call), thus it's important to check for restarting _after_
|
2018-10-31 01:07:05 +03:00
|
|
|
* get_signal().
|
2005-04-17 02:20:36 +04:00
|
|
|
*/
|
2010-02-08 21:42:17 +03:00
|
|
|
if ((long) scr->pt.r10 != -1)
|
2005-04-17 02:20:36 +04:00
|
|
|
/*
|
|
|
|
* A system calls has to be restarted only if one of the error codes
|
|
|
|
* ERESTARTNOHAND, ERESTARTSYS, or ERESTARTNOINTR is returned. If r10
|
|
|
|
* isn't -1 then r8 doesn't hold an error code and we don't need to
|
|
|
|
* restart the syscall, so we can clear the "restart" flag here.
|
|
|
|
*/
|
|
|
|
restart = 0;
|
|
|
|
|
2013-10-08 01:07:51 +04:00
|
|
|
if (ksig.sig <= 0)
|
2005-04-17 02:20:36 +04:00
|
|
|
break;
|
|
|
|
|
|
|
|
if (unlikely(restart)) {
|
|
|
|
switch (errno) {
|
|
|
|
case ERESTART_RESTARTBLOCK:
|
|
|
|
case ERESTARTNOHAND:
|
2010-02-08 21:42:17 +03:00
|
|
|
scr->pt.r8 = EINTR;
|
2005-04-17 02:20:36 +04:00
|
|
|
/* note: scr->pt.r10 is already -1 */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ERESTARTSYS:
|
2013-10-08 01:07:51 +04:00
|
|
|
if ((ksig.ka.sa.sa_flags & SA_RESTART) == 0) {
|
2010-02-08 21:42:17 +03:00
|
|
|
scr->pt.r8 = EINTR;
|
2005-04-17 02:20:36 +04:00
|
|
|
/* note: scr->pt.r10 is already -1 */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case ERESTARTNOINTR:
|
2010-02-08 21:42:17 +03:00
|
|
|
ia64_decrement_ip(&scr->pt);
|
2005-04-17 02:20:36 +04:00
|
|
|
restart = 0; /* don't restart twice if handle_signal() fails... */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Whee! Actually deliver the signal. If the delivery failed, we need to
|
|
|
|
* continue to iterate in this loop so we can deliver the SIGSEGV...
|
|
|
|
*/
|
2013-10-08 01:07:51 +04:00
|
|
|
if (handle_signal(&ksig, scr))
|
2007-01-23 19:03:17 +03:00
|
|
|
return;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Did we come from a system call? */
|
|
|
|
if (restart) {
|
|
|
|
/* Restart the system call - no handlers present */
|
|
|
|
if (errno == ERESTARTNOHAND || errno == ERESTARTSYS || errno == ERESTARTNOINTR
|
|
|
|
|| errno == ERESTART_RESTARTBLOCK)
|
|
|
|
{
|
2010-02-08 21:42:17 +03:00
|
|
|
/*
|
|
|
|
* Note: the syscall number is in r15 which is saved in
|
|
|
|
* pt_regs so all we need to do here is adjust ip so that
|
|
|
|
* the "break" instruction gets re-executed.
|
|
|
|
*/
|
|
|
|
ia64_decrement_ip(&scr->pt);
|
|
|
|
if (errno == ERESTART_RESTARTBLOCK)
|
|
|
|
scr->pt.r15 = __NR_restart_syscall;
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
}
|
2007-01-23 19:03:17 +03:00
|
|
|
|
|
|
|
/* if there's no signal to deliver, we just put the saved sigmask
|
|
|
|
* back */
|
2012-05-22 07:33:55 +04:00
|
|
|
restore_saved_sigmask();
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|