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linux/scripts/sorttable.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378 Based on 1 normalized pattern(s): licensed under the gnu general public license version 2 gplv2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 5 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531081036.993848054@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-31 01:09:38 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sorttable: Rename 'sortextable' to 'sorttable' Use a more generic name for additional table sorting usecases, such as the upcoming ORC table sorting feature. This tool is not tied to exception table sorting anymore. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-6-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:31 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sorttable: Implement build-time ORC unwind table sorting The ORC unwinder has two tables: .orc_unwind_ip and .orc_unwind, which need to be sorted for binary search. Previously this sorting was done during bootup. Sort them at build time to speed up booting. Add the ORC tables sorting in a parallel build process to speed up the build. [ mingo: Rewrote the changelog and fixed some comments. ] Suggested-by: Andy Lutomirski <luto@amacapital.net> Suggested-by: Peter Zijlstra <peterz@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-7-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:32 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sorttable: Implement build-time ORC unwind table sorting The ORC unwinder has two tables: .orc_unwind_ip and .orc_unwind, which need to be sorted for binary search. Previously this sorting was done during bootup. Sort them at build time to speed up booting. Add the ORC tables sorting in a parallel build process to speed up the build. [ mingo: Rewrote the changelog and fixed some comments. ] Suggested-by: Andy Lutomirski <luto@amacapital.net> Suggested-by: Peter Zijlstra <peterz@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-7-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:32 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
ARC: extable: Enable sorting at build time Avoids wasting cycles at boot specially on slower simulators Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Francois Bedard <fbedard@synopsys.com> Cc: linux-kernel@vger.kernel.org Acked-by: David Daney <david.daney@cavium.com>
2013-11-15 12:08:05 +05:30
xtensa: enable sorting extable at build time Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: David Daney <ddaney.cavm@gmail.com>
2014-02-18 15:29:11 +04:00
arm64: extable: sort the exception table at build time As is done for other architectures, sort the exception table at build-time rather than during boot. Since sortextable appears to be a standalone C program relying on the host elf.h to provide EM_AARCH64, I've had to add a conditional check in order to allow cross-compilation on machines that aren't running a bleeding-edge libc-dev. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-08 17:29:24 +01:00
microblaze: extable: sort the exception table at build time Sort the exception table at build-time rather than during boot. Microblaze is the same case as AARCH64 that's why EM_MICROBLAZE conditional check was added to allow cross-compilation on machines which are not running the latest libc-dev. Inspired by AARCH64 commit adace89562c7 ("arm64: extable: sort the exception table at build time"). Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: David Daney <david.daney@cavium.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-23 15:52:46 -08:00
ARCv2: extable: Enable sorting at build time Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-22 13:05:58 +05:30
scripts/sorttable: riscv: fix undeclared identifier 'EM_RISCV' error Fix the following build failure reported in [1] by adding a conditional definition of EM_RISCV in order to allow cross-compilation on machines which do not have EM_RISCV definition in their host. scripts/sorttable.c:352:7: error: use of undeclared identifier 'EM_RISCV' EM_RISCV was added to <elf.h> in glibc 2.24 so builds on systems with glibc headers < 2.24 should show this error. [mkubecek@suse.cz: changelog addition] Link: https://lore.kernel.org/lkml/e8965b25-f15b-c7b4-748c-d207dda9c8e8@i2se.com/ [1] Link: https://lkml.kernel.org/r/20210913030625.4525-1-miles.chen@mediatek.com Fixes: 54fed35fd393 ("riscv: Enable BUILDTIME_TABLE_SORT") Signed-off-by: Miles Chen <miles.chen@mediatek.com> Reported-by: Stefan Wahren <stefan.wahren@i2se.com> Tested-by: Stefan Wahren <stefan.wahren@i2se.com> Reviewed-by: Jisheng Zhang <jszhang@kernel.org> Cc: Michal Kubecek <mkubecek@suse.cz> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Markus Mayer <mmayer@broadcom.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-09-24 15:43:38 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: support objects with more than 64K sections. Building with a large config and -ffunction-sections results in a large number of sections and sortextable needs to be able to handle that. Implement support for > 64K sections as modpost does. Signed-off-by: Jamie Iles <jamie.iles@oracle.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-12 15:06:51 -08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sorttable: Rename 'sortextable' to 'sorttable' Use a more generic name for additional table sorting usecases, such as the upcoming ORC table sorting feature. This tool is not tied to exception table sorting anymore. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-6-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:31 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
s390/exceptions: switch to relative exception table entries This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-05 13:26:11 +02:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
arm64: extable: add `type` and `data` fields Subsequent patches will add specialized handlers for fixups, in addition to the simple PC fixup and BPF handlers we have today. In preparation, this patch adds a new `type` field to struct exception_table_entry, and uses this to distinguish the fixup and BPF cases. A `data` field is also added so that subsequent patches can associate data specific to each exception site (e.g. register numbers). Handlers are named ex_handler_*() for consistency, following the exmaple of x86. At the same time, get_ex_fixup() is split out into a helper so that it can be used by other ex_handler_*() functions ins subsequent patches. This patch will increase the size of the exception tables, which will be remedied by subsequent patches removing redundant fixup code. There should be no functional change as a result of this patch. Since each entry is now 12 bytes in size, we must reduce the alignment of each entry from `.align 3` (i.e. 8 bytes) to `.align 2` (i.e. 4 bytes), which is the natrual alignment of the `insn` and `fixup` fields. The current 8-byte alignment is a holdover from when the `insn` and `fixup` fields was 8 bytes, and while not harmful has not been necessary since commit: 6c94f27ac847ff8e ("arm64: switch to relative exception tables") Similarly, RO_EXCEPTION_TABLE_ALIGN is dropped to 4 bytes. Concurrently with this patch, x86's exception table entry format is being updated (similarly to a 12-byte format, with 32-bytes of absolute data). Once both have been merged it should be possible to unify the sorttable logic for the two. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: James Morse <james.morse@arm.com> Cc: Jean-Philippe Brucker <jean-philippe@linaro.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20211019160219.5202-11-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2021-10-19 17:02:16 +01:00
x86/mm: Expand the exception table logic to allow new handling options Huge amounts of help from Andy Lutomirski and Borislav Petkov to produce this. Andy provided the inspiration to add classes to the exception table with a clever bit-squeezing trick, Boris pointed out how much cleaner it would all be if we just had a new field. Linus Torvalds blessed the expansion with: ' I'd rather not be clever in order to save just a tiny amount of space in the exception table, which isn't really criticial for anybody. ' The third field is another relative function pointer, this one to a handler that executes the actions. We start out with three handlers: 1: Legacy - just jumps the to fixup IP 2: Fault - provide the trap number in %ax to the fixup code 3: Cleaned up legacy for the uaccess error hack Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f6af78fcbd348cf4939875cfda9c19689b5e50b8.1455732970.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-17 10:20:12 -08:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
x86/mm: Expand the exception table logic to allow new handling options Huge amounts of help from Andy Lutomirski and Borislav Petkov to produce this. Andy provided the inspiration to add classes to the exception table with a clever bit-squeezing trick, Boris pointed out how much cleaner it would all be if we just had a new field. Linus Torvalds blessed the expansion with: ' I'd rather not be clever in order to save just a tiny amount of space in the exception table, which isn't really criticial for anybody. ' The third field is another relative function pointer, this one to a handler that executes the actions. We start out with three handlers: 1: Legacy - just jumps the to fixup IP 2: Fault - provide the trap number in %ax to the fixup code 3: Cleaned up legacy for the uaccess error hack Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f6af78fcbd348cf4939875cfda9c19689b5e50b8.1455732970.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-17 10:20:12 -08:00
x86/extable: Rework the exception table mechanics The exception table entries contain the instruction address, the fixup address and the handler address. All addresses are relative. Storing the handler address has a few downsides: 1) Most handlers need to be exported 2) Handlers can be defined everywhere and there is no overview about the handler types 3) MCE needs to check the handler type to decide whether an in kernel #MC can be recovered. The functionality of the handler itself is not in any way special, but for these checks there need to be separate functions which in the worst case have to be exported. Some of these 'recoverable' exception fixups are pretty obscure and just reuse some other handler to spare code. That obfuscates e.g. the #MC safe copy functions. Cleaning that up would require more handlers and exports Rework the exception fixup mechanics by storing a fixup type number instead of the handler address and invoke the proper handler for each fixup type. Also teach the extable sort to leave the type field alone. This makes most handlers static except for special cases like the MCE MSR fixup and the BPF fixup. This allows to add more types for cleaning up the obscure places without adding more handler code and exports. There is a marginal code size reduction for a production config and it removes _eight_ exported symbols. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Alexei Starovoitov <ast@kernel.org> Link: https://lkml.kernel.org/r/20210908132525.211958725@linutronix.de
2021-09-08 15:29:18 +02:00
x86/mm: Expand the exception table logic to allow new handling options Huge amounts of help from Andy Lutomirski and Borislav Petkov to produce this. Andy provided the inspiration to add classes to the exception table with a clever bit-squeezing trick, Boris pointed out how much cleaner it would all be if we just had a new field. Linus Torvalds blessed the expansion with: ' I'd rather not be clever in order to save just a tiny amount of space in the exception table, which isn't really criticial for anybody. ' The third field is another relative function pointer, this one to a handler that executes the actions. We start out with three handlers: 1: Legacy - just jumps the to fixup IP 2: Fault - provide the trap number in %ax to the fixup code 3: Cleaned up legacy for the uaccess error hack Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f6af78fcbd348cf4939875cfda9c19689b5e50b8.1455732970.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-17 10:20:12 -08:00
x86/extable: Rework the exception table mechanics The exception table entries contain the instruction address, the fixup address and the handler address. All addresses are relative. Storing the handler address has a few downsides: 1) Most handlers need to be exported 2) Handlers can be defined everywhere and there is no overview about the handler types 3) MCE needs to check the handler type to decide whether an in kernel #MC can be recovered. The functionality of the handler itself is not in any way special, but for these checks there need to be separate functions which in the worst case have to be exported. Some of these 'recoverable' exception fixups are pretty obscure and just reuse some other handler to spare code. That obfuscates e.g. the #MC safe copy functions. Cleaning that up would require more handlers and exports Rework the exception fixup mechanics by storing a fixup type number instead of the handler address and invoke the proper handler for each fixup type. Also teach the extable sort to leave the type field alone. This makes most handlers static except for special cases like the MCE MSR fixup and the BPF fixup. This allows to add more types for cleaning up the obscure places without adding more handler code and exports. There is a marginal code size reduction for a production config and it removes _eight_ exported symbols. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Alexei Starovoitov <ast@kernel.org> Link: https://lkml.kernel.org/r/20210908132525.211958725@linutronix.de
2021-09-08 15:29:18 +02:00
x86/mm: Expand the exception table logic to allow new handling options Huge amounts of help from Andy Lutomirski and Borislav Petkov to produce this. Andy provided the inspiration to add classes to the exception table with a clever bit-squeezing trick, Boris pointed out how much cleaner it would all be if we just had a new field. Linus Torvalds blessed the expansion with: ' I'd rather not be clever in order to save just a tiny amount of space in the exception table, which isn't really criticial for anybody. ' The third field is another relative function pointer, this one to a handler that executes the actions. We start out with three handlers: 1: Legacy - just jumps the to fixup IP 2: Fault - provide the trap number in %ax to the fixup code 3: Cleaned up legacy for the uaccess error hack Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f6af78fcbd348cf4939875cfda9c19689b5e50b8.1455732970.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-17 10:20:12 -08:00
s390/kernel: expand exception table logic to allow new handling options This is a s390 port of commit 548acf19234d ("x86/mm: Expand the exception table logic to allow new handling options"), which is needed for implementing BPF_PROBE_MEM on s390. The new handler field is made 64-bit in order to allow pointing from dynamically allocated entries to handlers in kernel text. Unlike on x86, NULL is used instead of ex_handler_default. This is because exception tables are used by boot/text_dma.S, and it would be a pain to preserve ex_handler_default. The new infrastructure is ignored in early_pgm_check_handler, since there is no pt_regs. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2020-06-30 20:52:03 +02:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: add support for ET_DYN binaries Add support to scripts/sortextable for handling relocatable (PIE) executables, whose ELF type is ET_DYN, not ET_EXEC. Other than adding support for the new type, no changes are needed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-01-10 11:42:28 +01:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
x86/mm: Expand the exception table logic to allow new handling options Huge amounts of help from Andy Lutomirski and Borislav Petkov to produce this. Andy provided the inspiration to add classes to the exception table with a clever bit-squeezing trick, Boris pointed out how much cleaner it would all be if we just had a new field. Linus Torvalds blessed the expansion with: ' I'd rather not be clever in order to save just a tiny amount of space in the exception table, which isn't really criticial for anybody. ' The third field is another relative function pointer, this one to a handler that executes the actions. We start out with three handlers: 1: Legacy - just jumps the to fixup IP 2: Fault - provide the trap number in %ax to the fixup code 3: Cleaned up legacy for the uaccess error hack Signed-off-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/f6af78fcbd348cf4939875cfda9c19689b5e50b8.1455732970.git.tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-17 10:20:12 -08:00
s390/exceptions: sort exception table at build time Follow x86 and MIPS and sort the main exception table at build time. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-07-24 14:51:34 +02:00
s390/kernel: expand exception table logic to allow new handling options This is a s390 port of commit 548acf19234d ("x86/mm: Expand the exception table logic to allow new handling options"), which is needed for implementing BPF_PROBE_MEM on s390. The new handler field is made 64-bit in order to allow pointing from dynamically allocated entries to handlers in kernel text. Unlike on x86, NULL is used instead of ex_handler_default. This is because exception tables are used by boot/text_dma.S, and it would be a pain to preserve ex_handler_default. The new infrastructure is ignored in early_pgm_check_handler, since there is no pt_regs. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2020-06-30 20:52:03 +02:00
arm64: switch to relative exception tables Instead of using absolute addresses for both the exception location and the fixup, use offsets relative to the exception table entry values. Not only does this cut the size of the exception table in half, it is also a prerequisite for KASLR, since absolute exception table entries are subject to dynamic relocation, which is incompatible with the sorting of the exception table that occurs at build time. This patch also introduces the _ASM_EXTABLE preprocessor macro (which exists on x86 as well) and its _asm_extable assembly counterpart, as shorthands to emit exception table entries. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-01-01 15:02:12 +01:00
arm64: extable: add `type` and `data` fields Subsequent patches will add specialized handlers for fixups, in addition to the simple PC fixup and BPF handlers we have today. In preparation, this patch adds a new `type` field to struct exception_table_entry, and uses this to distinguish the fixup and BPF cases. A `data` field is also added so that subsequent patches can associate data specific to each exception site (e.g. register numbers). Handlers are named ex_handler_*() for consistency, following the exmaple of x86. At the same time, get_ex_fixup() is split out into a helper so that it can be used by other ex_handler_*() functions ins subsequent patches. This patch will increase the size of the exception tables, which will be remedied by subsequent patches removing redundant fixup code. There should be no functional change as a result of this patch. Since each entry is now 12 bytes in size, we must reduce the alignment of each entry from `.align 3` (i.e. 8 bytes) to `.align 2` (i.e. 4 bytes), which is the natrual alignment of the `insn` and `fixup` fields. The current 8-byte alignment is a holdover from when the `insn` and `fixup` fields was 8 bytes, and while not harmful has not been necessary since commit: 6c94f27ac847ff8e ("arm64: switch to relative exception tables") Similarly, RO_EXCEPTION_TABLE_ALIGN is dropped to 4 bytes. Concurrently with this patch, x86's exception table entry format is being updated (similarly to a 12-byte format, with 32-bytes of absolute data). Once both have been merged it should be possible to unify the sorttable logic for the two. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: James Morse <james.morse@arm.com> Cc: Jean-Philippe Brucker <jean-philippe@linaro.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20211019160219.5202-11-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2021-10-19 17:02:16 +01:00
parisc: Use generic extable search and sort routines Switch to the generic extable search and sort routines which were introduced with commit a272858 from Ard Biesheuvel. This saves quite some memory in the vmlinux binary with the 64bit kernel. Signed-off-by: Helge Deller <deller@gmx.de>
2016-03-23 16:00:46 +01:00
powerpc: Build-time sort the exception table Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-10-13 16:42:55 +11:00
s390/exceptions: switch to relative exception table entries This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-05 13:26:11 +02:00
ARC: extable: Enable sorting at build time Avoids wasting cycles at boot specially on slower simulators Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Francois Bedard <fbedard@synopsys.com> Cc: linux-kernel@vger.kernel.org Acked-by: David Daney <david.daney@cavium.com>
2013-11-15 12:08:05 +05:30
ARCv2: extable: Enable sorting at build time Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-22 13:05:58 +05:30
ARM: 7568/1: Sort exception table at compile time Add the ARM machine identifier to sortextable and select the config option so that we can sort the exception table at compile time. sortextable relies on a section named __ex_table existing in the vmlinux, but ARM's linker script places the exception table in the data section. Give the exception table its own section so that sortextable can find it. This allows us to skip the sorting step during boot. Cc: David Daney <david.daney@cavium.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-10-29 19:19:34 +01:00
microblaze: extable: sort the exception table at build time Sort the exception table at build-time rather than during boot. Microblaze is the same case as AARCH64 that's why EM_MICROBLAZE conditional check was added to allow cross-compilation on machines which are not running the latest libc-dev. Inspired by AARCH64 commit adace89562c7 ("arm64: extable: sort the exception table at build time"). Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: David Daney <david.daney@cavium.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-23 15:52:46 -08:00
scripts/sortextable: Handle relative entries, and other cleanups x86 is now using relative rather than absolute addresses in its exception table, so we add a sorter for these. If there are relocations on the __ex_table section, they are redundant and probably incorrect after the sort, so they are zeroed out leaving them valid and consistent. Also use the unaligned safe accessors from tools/{be,le}_byteshift.h Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1335291795-26693-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-04-24 11:23:14 -07:00
riscv: Enable BUILDTIME_TABLE_SORT Enable BUILDTIME_TABLE_SORT to sort the exception table at build time rather than during boot. Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2021-08-26 22:10:29 +08:00
xtensa: enable sorting extable at build time Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: David Daney <ddaney.cavm@gmail.com>
2014-02-18 15:29:11 +04:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: add support for ET_DYN binaries Add support to scripts/sortextable for handling relocatable (PIE) executables, whose ELF type is ET_DYN, not ET_EXEC. Other than adding support for the new type, no changes are needed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-01-10 11:42:28 +01:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Refactor the do_func() function Refine the loop, naming and code structure, make the code more readable and extendable. No functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-5-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:30 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Refactor the do_func() function Refine the loop, naming and code structure, make the code more readable and extendable. No functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-5-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:30 +08:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sorttable: Rename 'sortextable' to 'sorttable' Use a more generic name for additional table sorting usecases, such as the upcoming ORC table sorting feature. This tool is not tied to exception table sorting anymore. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-6-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:31 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Rewrite error/success handling The scripts/sortextable.c code has originally copied some code from scripts/recordmount.c, which used the same setjmp/longjmp method to manage control flow. Meanwhile recordmcount has improved its error handling via: 3f1df12019f3 ("recordmcount: Rewrite error/success handling"). So rewrite this part of sortextable as well to get rid of the setjmp/longjmp kludges, with additional refactoring, to make it more readable and easier to extend. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-2-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:27 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00
scripts/sortextable: Clean up the code to meet the kernel coding style better Fix various style errors and inconsistencies, no functional changes intended. Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-3-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-04 08:46:28 +08:00
scripts: Add sortextable to sort the kernel's exception table. Using this build-time sort saves time booting as we don't have to burn cycles sorting the exception table. Signed-off-by: David Daney <david.daney@cavium.com> Link: http://lkml.kernel.org/r/1334872799-14589-2-git-send-email-ddaney.cavm@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-04-19 14:59:55 -07:00