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 14:07:57 +00:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2008-10-23 05:26:29 +00:00
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#ifndef _ASM_X86_PTRACE_H
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#define _ASM_X86_PTRACE_H
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2007-10-23 20:37:24 +00:00
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2008-05-28 07:46:19 +00:00
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#include <asm/segment.h>
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2009-08-13 20:34:44 +00:00
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#include <asm/page_types.h>
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2012-12-14 22:37:13 +00:00
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#include <uapi/asm/ptrace.h>
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2008-01-30 12:31:09 +00:00
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2007-10-23 20:37:24 +00:00
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#ifndef __ASSEMBLY__
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#ifdef __i386__
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2008-01-30 12:30:56 +00:00
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struct pt_regs {
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2017-07-28 13:00:30 +00:00
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/*
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* NB: 32-bit x86 CPUs are inconsistent as what happens in the
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* following cases (where %seg represents a segment register):
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*
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* - pushl %seg: some do a 16-bit write and leave the high
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* bits alone
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* - movl %seg, [mem]: some do a 16-bit write despite the movl
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* - IDT entry: some (e.g. 486) will leave the high bits of CS
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* and (if applicable) SS undefined.
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*
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* Fortunately, x86-32 doesn't read the high bits on POP or IRET,
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* so we can just treat all of the segment registers as 16-bit
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* values.
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*/
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2008-02-08 20:09:56 +00:00
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unsigned long bx;
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unsigned long cx;
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unsigned long dx;
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unsigned long si;
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unsigned long di;
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unsigned long bp;
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2008-02-08 20:09:57 +00:00
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unsigned long ax;
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2017-07-28 13:00:30 +00:00
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unsigned short ds;
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unsigned short __dsh;
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unsigned short es;
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unsigned short __esh;
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unsigned short fs;
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unsigned short __fsh;
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x86/stackprotector/32: Make the canary into a regular percpu variable
On 32-bit kernels, the stackprotector canary is quite nasty -- it is
stored at %gs:(20), which is nasty because 32-bit kernels use %fs for
percpu storage. It's even nastier because it means that whether %gs
contains userspace state or kernel state while running kernel code
depends on whether stackprotector is enabled (this is
CONFIG_X86_32_LAZY_GS), and this setting radically changes the way
that segment selectors work. Supporting both variants is a
maintenance and testing mess.
Merely rearranging so that percpu and the stack canary
share the same segment would be messy as the 32-bit percpu address
layout isn't currently compatible with putting a variable at a fixed
offset.
Fortunately, GCC 8.1 added options that allow the stack canary to be
accessed as %fs:__stack_chk_guard, effectively turning it into an ordinary
percpu variable. This lets us get rid of all of the code to manage the
stack canary GDT descriptor and the CONFIG_X86_32_LAZY_GS mess.
(That name is special. We could use any symbol we want for the
%fs-relative mode, but for CONFIG_SMP=n, gcc refuses to let us use any
name other than __stack_chk_guard.)
Forcibly disable stackprotector on older compilers that don't support
the new options and turn the stack canary into a percpu variable. The
"lazy GS" approach is now used for all 32-bit configurations.
Also makes load_gs_index() work on 32-bit kernels. On 64-bit kernels,
it loads the GS selector and updates the user GSBASE accordingly. (This
is unchanged.) On 32-bit kernels, it loads the GS selector and updates
GSBASE, which is now always the user base. This means that the overall
effect is the same on 32-bit and 64-bit, which avoids some ifdeffery.
[ bp: Massage commit message. ]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/c0ff7dba14041c7e5d1cae5d4df052f03759bef3.1613243844.git.luto@kernel.org
2021-02-13 19:19:44 +00:00
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/*
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* On interrupt, gs and __gsh store the vector number. They never
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* store gs any more.
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*/
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2017-07-28 13:00:30 +00:00
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unsigned short gs;
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unsigned short __gsh;
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2018-08-28 20:14:19 +00:00
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/* On interrupt, this is the error code. */
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2008-02-08 20:09:57 +00:00
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unsigned long orig_ax;
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2008-02-08 20:09:56 +00:00
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unsigned long ip;
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2017-07-28 13:00:30 +00:00
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unsigned short cs;
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unsigned short __csh;
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2008-02-08 20:09:56 +00:00
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unsigned long flags;
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unsigned long sp;
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2017-07-28 13:00:30 +00:00
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unsigned short ss;
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unsigned short __ssh;
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2008-01-30 12:30:56 +00:00
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};
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2007-10-23 20:37:24 +00:00
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#else /* __i386__ */
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2008-01-30 12:30:56 +00:00
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struct pt_regs {
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2015-02-26 22:40:28 +00:00
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/*
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* C ABI says these regs are callee-preserved. They aren't saved on kernel entry
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* unless syscall needs a complete, fully filled "struct pt_regs".
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*/
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2008-01-30 12:30:56 +00:00
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unsigned long r15;
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unsigned long r14;
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unsigned long r13;
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unsigned long r12;
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unsigned long bp;
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unsigned long bx;
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2015-02-26 22:40:28 +00:00
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/* These regs are callee-clobbered. Always saved on kernel entry. */
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2008-01-30 12:30:56 +00:00
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unsigned long r11;
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unsigned long r10;
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unsigned long r9;
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unsigned long r8;
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unsigned long ax;
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unsigned long cx;
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unsigned long dx;
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unsigned long si;
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unsigned long di;
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2015-02-26 22:40:28 +00:00
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/*
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* On syscall entry, this is syscall#. On CPU exception, this is error code.
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* On hw interrupt, it's IRQ number:
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*/
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2008-01-30 12:30:56 +00:00
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unsigned long orig_ax;
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2015-02-26 22:40:28 +00:00
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/* Return frame for iretq */
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2008-01-30 12:30:56 +00:00
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unsigned long ip;
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unsigned long cs;
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unsigned long flags;
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unsigned long sp;
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unsigned long ss;
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/* top of stack page */
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};
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2007-10-23 20:37:24 +00:00
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2008-01-30 12:33:16 +00:00
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#endif /* !__i386__ */
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2007-10-23 20:37:24 +00:00
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2011-08-03 13:31:53 +00:00
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt_types.h>
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#endif
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2007-10-23 20:37:24 +00:00
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2021-03-03 14:17:12 +00:00
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#include <asm/proto.h>
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2008-04-08 09:01:58 +00:00
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struct cpuinfo_x86;
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2007-10-23 20:37:24 +00:00
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struct task_struct;
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2008-01-30 12:33:16 +00:00
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extern unsigned long profile_pc(struct pt_regs *regs);
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2007-10-23 20:37:24 +00:00
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extern unsigned long
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2008-01-30 12:33:12 +00:00
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convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
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2019-02-06 00:25:11 +00:00
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extern void send_sigtrap(struct pt_regs *regs, int error_code, int si_code);
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2008-09-05 23:27:11 +00:00
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2014-09-05 22:13:54 +00:00
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2008-02-08 20:09:57 +00:00
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static inline unsigned long regs_return_value(struct pt_regs *regs)
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{
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return regs->ax;
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}
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2008-01-30 12:30:46 +00:00
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2017-12-11 16:36:48 +00:00
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static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
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{
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regs->ax = rc;
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}
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2008-01-30 12:33:16 +00:00
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/*
|
2015-03-19 01:33:32 +00:00
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* user_mode(regs) determines whether a register set came from user
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* mode. On x86_32, this is true if V8086 mode was enabled OR if the
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* register set was from protected mode with RPL-3 CS value. This
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* tricky test checks that with one comparison.
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*
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* On x86_64, vm86 mode is mercifully nonexistent, and we don't need
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* the extra check.
|
2008-01-30 12:33:16 +00:00
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*/
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2020-01-21 14:53:09 +00:00
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static __always_inline int user_mode(struct pt_regs *regs)
|
2008-01-30 12:33:16 +00:00
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{
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#ifdef CONFIG_X86_32
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2015-05-28 08:16:45 +00:00
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return ((regs->cs & SEGMENT_RPL_MASK) | (regs->flags & X86_VM_MASK)) >= USER_RPL;
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2008-01-30 12:33:16 +00:00
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#else
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return !!(regs->cs & 3);
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#endif
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}
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static inline int v8086_mode(struct pt_regs *regs)
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{
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#ifdef CONFIG_X86_32
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2008-03-28 14:56:57 +00:00
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return (regs->flags & X86_VM_MASK);
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2008-01-30 12:33:16 +00:00
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#else
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return 0; /* No V86 mode support in long mode */
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#endif
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}
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2011-08-03 13:31:53 +00:00
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static inline bool user_64bit_mode(struct pt_regs *regs)
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{
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2017-10-27 20:25:30 +00:00
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#ifdef CONFIG_X86_64
|
2018-08-28 07:40:22 +00:00
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#ifndef CONFIG_PARAVIRT_XXL
|
2011-08-03 13:31:53 +00:00
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/*
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* On non-paravirt systems, this is the only long mode CPL 3
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* selector. We do not allow long mode selectors in the LDT.
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*/
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return regs->cs == __USER_CS;
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#else
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/* Headers are too twisted for this to go in paravirt.h. */
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return regs->cs == __USER_CS || regs->cs == pv_info.extra_user_64bit_cs;
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#endif
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2017-10-27 20:25:30 +00:00
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#else /* !CONFIG_X86_64 */
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return false;
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#endif
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2011-08-03 13:31:53 +00:00
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}
|
2012-12-14 18:49:35 +00:00
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2019-12-18 23:11:47 +00:00
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/*
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* Determine whether the register set came from any context that is running in
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* 64-bit mode.
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*/
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static inline bool any_64bit_mode(struct pt_regs *regs)
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{
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#ifdef CONFIG_X86_64
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return !user_mode(regs) || user_64bit_mode(regs);
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#else
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return false;
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#endif
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}
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2017-10-27 20:25:30 +00:00
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#ifdef CONFIG_X86_64
|
2015-03-09 18:39:23 +00:00
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#define current_user_stack_pointer() current_pt_regs()->sp
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#define compat_user_stack_pointer() current_pt_regs()->sp
|
2021-03-03 14:17:12 +00:00
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static inline bool ip_within_syscall_gap(struct pt_regs *regs)
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{
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bool ret = (regs->ip >= (unsigned long)entry_SYSCALL_64 &&
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regs->ip < (unsigned long)entry_SYSCALL_64_safe_stack);
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#ifdef CONFIG_IA32_EMULATION
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ret = ret || (regs->ip >= (unsigned long)entry_SYSCALL_compat &&
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regs->ip < (unsigned long)entry_SYSCALL_compat_safe_stack);
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#endif
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return ret;
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}
|
2011-08-03 13:31:53 +00:00
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#endif
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2012-09-03 18:54:48 +00:00
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static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
|
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{
|
2008-01-30 12:33:16 +00:00
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return regs->sp;
|
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}
|
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|
2019-06-24 05:47:27 +00:00
|
|
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static inline unsigned long instruction_pointer(struct pt_regs *regs)
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{
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|
|
return regs->ip;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void instruction_pointer_set(struct pt_regs *regs,
|
|
|
|
|
unsigned long val)
|
|
|
|
|
{
|
|
|
|
|
regs->ip = val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline unsigned long frame_pointer(struct pt_regs *regs)
|
|
|
|
|
{
|
|
|
|
|
return regs->bp;
|
|
|
|
|
}
|
2008-01-30 12:33:16 +00:00
|
|
|
|
2019-06-24 05:47:27 +00:00
|
|
|
static inline unsigned long user_stack_pointer(struct pt_regs *regs)
|
|
|
|
|
{
|
|
|
|
|
return regs->sp;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void user_stack_pointer_set(struct pt_regs *regs,
|
|
|
|
|
unsigned long val)
|
|
|
|
|
{
|
|
|
|
|
regs->sp = val;
|
|
|
|
|
}
|
2008-04-19 00:08:44 +00:00
|
|
|
|
2020-07-22 22:00:03 +00:00
|
|
|
static __always_inline bool regs_irqs_disabled(struct pt_regs *regs)
|
|
|
|
|
{
|
|
|
|
|
return !(regs->flags & X86_EFLAGS_IF);
|
|
|
|
|
}
|
|
|
|
|
|
2009-08-13 20:34:44 +00:00
|
|
|
/* Query offset/name of register from its name/offset */
|
|
|
|
|
extern int regs_query_register_offset(const char *name);
|
|
|
|
|
extern const char *regs_query_register_name(unsigned int offset);
|
|
|
|
|
#define MAX_REG_OFFSET (offsetof(struct pt_regs, ss))
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* regs_get_register() - get register value from its offset
|
|
|
|
|
* @regs: pt_regs from which register value is gotten.
|
|
|
|
|
* @offset: offset number of the register.
|
|
|
|
|
*
|
2009-12-01 00:02:22 +00:00
|
|
|
* regs_get_register returns the value of a register. The @offset is the
|
|
|
|
|
* offset of the register in struct pt_regs address which specified by @regs.
|
2009-08-13 20:34:44 +00:00
|
|
|
* If @offset is bigger than MAX_REG_OFFSET, this returns 0.
|
|
|
|
|
*/
|
|
|
|
|
static inline unsigned long regs_get_register(struct pt_regs *regs,
|
|
|
|
|
unsigned int offset)
|
|
|
|
|
{
|
|
|
|
|
if (unlikely(offset > MAX_REG_OFFSET))
|
|
|
|
|
return 0;
|
2012-07-13 19:44:14 +00:00
|
|
|
#ifdef CONFIG_X86_32
|
2017-08-09 21:39:45 +00:00
|
|
|
/* The selector fields are 16-bit. */
|
|
|
|
|
if (offset == offsetof(struct pt_regs, cs) ||
|
|
|
|
|
offset == offsetof(struct pt_regs, ss) ||
|
|
|
|
|
offset == offsetof(struct pt_regs, ds) ||
|
|
|
|
|
offset == offsetof(struct pt_regs, es) ||
|
|
|
|
|
offset == offsetof(struct pt_regs, fs) ||
|
|
|
|
|
offset == offsetof(struct pt_regs, gs)) {
|
|
|
|
|
return *(u16 *)((unsigned long)regs + offset);
|
|
|
|
|
|
|
|
|
|
}
|
2012-07-13 19:44:14 +00:00
|
|
|
#endif
|
2009-08-13 20:34:44 +00:00
|
|
|
return *(unsigned long *)((unsigned long)regs + offset);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* regs_within_kernel_stack() - check the address in the stack
|
|
|
|
|
* @regs: pt_regs which contains kernel stack pointer.
|
|
|
|
|
* @addr: address which is checked.
|
|
|
|
|
*
|
2009-12-01 00:02:22 +00:00
|
|
|
* regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
|
2009-08-13 20:34:44 +00:00
|
|
|
* If @addr is within the kernel stack, it returns true. If not, returns false.
|
|
|
|
|
*/
|
|
|
|
|
static inline int regs_within_kernel_stack(struct pt_regs *regs,
|
|
|
|
|
unsigned long addr)
|
|
|
|
|
{
|
2019-05-07 21:25:54 +00:00
|
|
|
return ((addr & ~(THREAD_SIZE - 1)) == (regs->sp & ~(THREAD_SIZE - 1)));
|
2009-08-13 20:34:44 +00:00
|
|
|
}
|
|
|
|
|
|
2018-10-17 20:59:51 +00:00
|
|
|
/**
|
|
|
|
|
* regs_get_kernel_stack_nth_addr() - get the address of the Nth entry on stack
|
|
|
|
|
* @regs: pt_regs which contains kernel stack pointer.
|
|
|
|
|
* @n: stack entry number.
|
|
|
|
|
*
|
|
|
|
|
* regs_get_kernel_stack_nth() returns the address of the @n th entry of the
|
|
|
|
|
* kernel stack which is specified by @regs. If the @n th entry is NOT in
|
|
|
|
|
* the kernel stack, this returns NULL.
|
|
|
|
|
*/
|
|
|
|
|
static inline unsigned long *regs_get_kernel_stack_nth_addr(struct pt_regs *regs, unsigned int n)
|
|
|
|
|
{
|
2019-05-07 21:25:54 +00:00
|
|
|
unsigned long *addr = (unsigned long *)regs->sp;
|
2018-10-17 20:59:51 +00:00
|
|
|
|
|
|
|
|
addr += n;
|
|
|
|
|
if (regs_within_kernel_stack(regs, (unsigned long)addr))
|
|
|
|
|
return addr;
|
|
|
|
|
else
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* To avoid include hell, we can't include uaccess.h */
|
2020-06-17 07:37:53 +00:00
|
|
|
extern long copy_from_kernel_nofault(void *dst, const void *src, size_t size);
|
2018-10-17 20:59:51 +00:00
|
|
|
|
2009-08-13 20:34:44 +00:00
|
|
|
/**
|
|
|
|
|
* regs_get_kernel_stack_nth() - get Nth entry of the stack
|
|
|
|
|
* @regs: pt_regs which contains kernel stack pointer.
|
|
|
|
|
* @n: stack entry number.
|
|
|
|
|
*
|
|
|
|
|
* regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
|
2018-10-17 20:59:51 +00:00
|
|
|
* is specified by @regs. If the @n th entry is NOT in the kernel stack
|
2009-08-13 20:34:44 +00:00
|
|
|
* this returns 0.
|
|
|
|
|
*/
|
|
|
|
|
static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
|
|
|
|
|
unsigned int n)
|
|
|
|
|
{
|
2018-10-17 20:59:51 +00:00
|
|
|
unsigned long *addr;
|
|
|
|
|
unsigned long val;
|
|
|
|
|
long ret;
|
|
|
|
|
|
|
|
|
|
addr = regs_get_kernel_stack_nth_addr(regs, n);
|
|
|
|
|
if (addr) {
|
2020-06-17 07:37:53 +00:00
|
|
|
ret = copy_from_kernel_nofault(&val, addr, sizeof(val));
|
2018-10-17 20:59:51 +00:00
|
|
|
if (!ret)
|
|
|
|
|
return val;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
2009-08-13 20:34:44 +00:00
|
|
|
}
|
|
|
|
|
|
2018-04-25 12:20:57 +00:00
|
|
|
/**
|
|
|
|
|
* regs_get_kernel_argument() - get Nth function argument in kernel
|
|
|
|
|
* @regs: pt_regs of that context
|
|
|
|
|
* @n: function argument number (start from 0)
|
|
|
|
|
*
|
|
|
|
|
* regs_get_argument() returns @n th argument of the function call.
|
|
|
|
|
* Note that this chooses most probably assignment, in some case
|
|
|
|
|
* it can be incorrect.
|
|
|
|
|
* This is expected to be called from kprobes or ftrace with regs
|
|
|
|
|
* where the top of stack is the return address.
|
|
|
|
|
*/
|
|
|
|
|
static inline unsigned long regs_get_kernel_argument(struct pt_regs *regs,
|
|
|
|
|
unsigned int n)
|
|
|
|
|
{
|
|
|
|
|
static const unsigned int argument_offs[] = {
|
|
|
|
|
#ifdef __i386__
|
|
|
|
|
offsetof(struct pt_regs, ax),
|
|
|
|
|
offsetof(struct pt_regs, dx),
|
2020-08-28 11:32:46 +00:00
|
|
|
offsetof(struct pt_regs, cx),
|
2018-04-25 12:20:57 +00:00
|
|
|
#define NR_REG_ARGUMENTS 3
|
|
|
|
|
#else
|
|
|
|
|
offsetof(struct pt_regs, di),
|
|
|
|
|
offsetof(struct pt_regs, si),
|
|
|
|
|
offsetof(struct pt_regs, dx),
|
|
|
|
|
offsetof(struct pt_regs, cx),
|
|
|
|
|
offsetof(struct pt_regs, r8),
|
|
|
|
|
offsetof(struct pt_regs, r9),
|
|
|
|
|
#define NR_REG_ARGUMENTS 6
|
|
|
|
|
#endif
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
if (n >= NR_REG_ARGUMENTS) {
|
|
|
|
|
n -= NR_REG_ARGUMENTS - 1;
|
|
|
|
|
return regs_get_kernel_stack_nth(regs, n);
|
|
|
|
|
} else
|
|
|
|
|
return regs_get_register(regs, argument_offs[n]);
|
|
|
|
|
}
|
|
|
|
|
|
2008-01-30 12:30:48 +00:00
|
|
|
#define arch_has_single_step() (1)
|
2008-01-30 12:30:54 +00:00
|
|
|
#ifdef CONFIG_X86_DEBUGCTLMSR
|
|
|
|
|
#define arch_has_block_step() (1)
|
|
|
|
|
#else
|
|
|
|
|
#define arch_has_block_step() (boot_cpu_data.x86 >= 6)
|
|
|
|
|
#endif
|
|
|
|
|
|
2018-04-16 19:18:26 +00:00
|
|
|
#define ARCH_HAS_USER_SINGLE_STEP_REPORT
|
2009-12-16 00:47:20 +00:00
|
|
|
|
2008-01-30 12:30:46 +00:00
|
|
|
struct user_desc;
|
|
|
|
|
extern int do_get_thread_area(struct task_struct *p, int idx,
|
|
|
|
|
struct user_desc __user *info);
|
|
|
|
|
extern int do_set_thread_area(struct task_struct *p, int idx,
|
|
|
|
|
struct user_desc __user *info, int can_allocate);
|
|
|
|
|
|
2019-11-11 22:03:16 +00:00
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
|
# define do_set_thread_area_64(p, s, t) do_arch_prctl_64(p, s, t)
|
|
|
|
|
#else
|
|
|
|
|
# define do_set_thread_area_64(p, s, t) (0)
|
|
|
|
|
#endif
|
|
|
|
|
|
2007-10-23 20:37:24 +00:00
|
|
|
#endif /* !__ASSEMBLY__ */
|
2008-10-23 05:26:29 +00:00
|
|
|
#endif /* _ASM_X86_PTRACE_H */
|