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7c6dd961 |
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09-Jan-2023 |
Peter Zijlstra <peterz@infradead.org> |
x86/boot: Avoid using Intel mnemonics in AT&T syntax asm With 'GNU assembler (GNU Binutils for Debian) 2.39.90.20221231' the build now reports: arch/x86/realmode/rm/../../boot/bioscall.S: Assembler messages: arch/x86/realmode/rm/../../boot/bioscall.S:35: Warning: found `movsd'; assuming `movsl' was meant arch/x86/realmode/rm/../../boot/bioscall.S:70: Warning: found `movsd'; assuming `movsl' was meant arch/x86/boot/bioscall.S: Assembler messages: arch/x86/boot/bioscall.S:35: Warning: found `movsd'; assuming `movsl' was meant arch/x86/boot/bioscall.S:70: Warning: found `movsd'; assuming `movsl' was meant Which is due to: PR gas/29525 Note that with the dropped CMPSD and MOVSD Intel Syntax string insn templates taking operands, mixed IsString/non-IsString template groups (with memory operands) cannot occur anymore. With that maybe_adjust_templates() becomes unnecessary (and is hence being removed). More details: https://sourceware.org/bugzilla/show_bug.cgi?id=29525 Borislav Petkov further explains: " the particular problem here is is that the 'd' suffix is "conflicting" in the sense that you can have SSE mnemonics like movsD %xmm... and the same thing also for string ops (which is the case here) so apparently the agreement in binutils land is to use the always accepted suffixes 'l' or 'q' and phase out 'd' slowly... " Fixes: 7a734e7dd93b ("x86, setup: "glove box" BIOS calls -- infrastructure") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/Y71I3Ex2pvIxMpsP@hirez.programming.kicks-ass.net
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d6910058 |
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22-May-2019 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83 Based on 1 normalized pattern(s): this file is part of the linux kernel and is made available under the terms of the gnu general public license version 2 or at your option any later version incorporated herein by reference extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 18 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520075211.321157221@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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6f34152f |
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04-Jan-2014 |
H. Peter Anvin <hpa@linux.intel.com> |
x86, boot: Move intcall() to the .inittext section The .inittext section tries to aggregate all functions which are needed to get a message out in the case of a load failure. However, putchar() uses intcall(), so intcall() should be in the .inittext section. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/n/tip-twxm8igouzbmsklmf6lfyq0w@git.kernel.org
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e24df921 |
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03-Jan-2014 |
David Woodhouse <dwmw2@infradead.org> |
x86, boot: Use .code16 instead of .code16gcc This reverts commit 28b48688 ("x86, boot: use .code16gcc instead of .code16"). Versions of binutils older than 2.16 are already not working, so this workaround is no longer necessary either. At the same time, some of the transformations that .code16gcc does can be *extremely* counterintuitive to a human programmer. [ hpa: folded ret -> retl and call -> calll fixes from followup patch ] Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Link: http://lkml.kernel.org/r/1388788242.2391.75.camel@shinybook.infradead.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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28b48688 |
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16-Jun-2009 |
H. Peter Anvin <hpa@zytor.com> |
x86, boot: use .code16gcc instead of .code16 Use .code16gcc to compile arch/x86/boot/bioscall.S rather than .code16, since some older versions of binutils can't generate 32-bit addressing expressions (67 prefixes) in .code16 mode, only in .code16gcc mode. Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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cf9972a9 |
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11-Apr-2009 |
H. Peter Anvin <hpa@zytor.com> |
x86, setup: fix comment in the "glove box" code Impact: Comment change only The glove box is about avoiding problems with *registers* being touched, not *memory*. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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7a734e7d |
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01-Apr-2009 |
H. Peter Anvin <hpa@linux.intel.com> |
x86, setup: "glove box" BIOS calls -- infrastructure Impact: new interfaces (not yet used) For all the platforms out there, there is an infinite number of buggy BIOSes. This adds infrastructure to treat BIOS interrupts more like toxic waste and "glove box" them -- we switch out the register set, perform the BIOS interrupt, and then restore the previous state. LKML-Reference: <49DE7F79.4030106@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Rafael J. Wysocki <rjw@sisk.pl>
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