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Groups > linux.kernel > #1243332
| From | tip-bot for Andy Lutomirski <tipbot@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [tip:x86/asm] x86/vdso: Replace hex int80 CFI annotations with GAS directives |
| Date | 2015-10-09 15:10 +0200 |
| Message-ID | <qhFAS-30e-21@gated-at.bofh.it> (permalink) |
| References | <qgoLN-7cw-37@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Commit-ID: 29c0ce9508458ed31a9db2ed425f64c0d6d3ddfb Gitweb: http://git.kernel.org/tip/29c0ce9508458ed31a9db2ed425f64c0d6d3ddfb Author: Andy Lutomirski <luto@kernel.org> AuthorDate: Mon, 5 Oct 2015 17:47:59 -0700 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 9 Oct 2015 09:41:06 +0200 x86/vdso: Replace hex int80 CFI annotations with GAS directives Maintaining the current CFI annotations written in R'lyehian is difficult for most of us. Translate them to something a little closer to English. This will remove the CFI data for kernels built with extremely old versions of binutils. I think this is a fair tradeoff for the ability for mortals to edit the asm. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/ae3ff4ff5278b4bfc1e1dab368823469866d4b71.1444091584.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/entry/vdso/vdso32/system_call.S | 48 ++++++-------------------------- 1 file changed, 8 insertions(+), 40 deletions(-) diff --git a/arch/x86/entry/vdso/vdso32/system_call.S b/arch/x86/entry/vdso/vdso32/system_call.S index b15b7c0..b52cbfb 100644 --- a/arch/x86/entry/vdso/vdso32/system_call.S +++ b/arch/x86/entry/vdso/vdso32/system_call.S @@ -1,6 +1,10 @@ /* * Code for the vDSO. This version uses the old int $0x80 method. - * +*/ + +#include <asm/dwarf2.h> + +/* * First get the common code for the sigreturn entry points. * This must come first. */ @@ -11,46 +15,10 @@ .type __kernel_vsyscall,@function ALIGN __kernel_vsyscall: -.LSTART_vsyscall: + CFI_STARTPROC int $0x80 ret -.LEND_vsyscall: - .size __kernel_vsyscall,.-.LSTART_vsyscall - .previous - - .section .eh_frame,"a",@progbits -.LSTARTFRAMEDLSI: - .long .LENDCIEDLSI-.LSTARTCIEDLSI -.LSTARTCIEDLSI: - .long 0 /* CIE ID */ - .byte 1 /* Version number */ - .string "zR" /* NUL-terminated augmentation string */ - .uleb128 1 /* Code alignment factor */ - .sleb128 -4 /* Data alignment factor */ - .byte 8 /* Return address register column */ - .uleb128 1 /* Augmentation value length */ - .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ - .byte 0x0c /* DW_CFA_def_cfa */ - .uleb128 4 - .uleb128 4 - .byte 0x88 /* DW_CFA_offset, column 0x8 */ - .uleb128 1 - .align 4 -.LENDCIEDLSI: - .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */ -.LSTARTFDEDLSI: - .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */ - .long .LSTART_vsyscall-. /* PC-relative start address */ - .long .LEND_vsyscall-.LSTART_vsyscall - .uleb128 0 - .align 4 -.LENDFDEDLSI: - .previous + CFI_ENDPROC - /* - * Pad out the segment to match the size of the sysenter.S version. - */ -VDSO32_vsyscall_eh_frame_size = 0x40 - .section .data,"aw",@progbits - .space VDSO32_vsyscall_eh_frame_size-(.LENDFDEDLSI-.LSTARTFRAMEDLSI), 0 + .size __kernel_vsyscall,.-__kernel_vsyscall .previous -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[PATCH v2 04/36] selftests/x86: Add a test for syscall restart and arg modification Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] selftests/x86: Add a test for ptrace syscall restart and arg modification tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-07 18:20 +0200
[PATCH v2 20/36] x86/entry: Add do_syscall_32, a C function to do 32-bit syscalls Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/entry: Add do_syscall_32(), a C function to do 32-bit syscalls tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
[PATCH v2 13/36] x86/vdso/32: Save extra registers in the INT80 vsyscall path Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/vdso/32: Save extra registers in the INT80 vsyscall path tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:10 +0200
[PATCH v2 11/36] x86/vdso: Replace hex int80 CFI annotations with gas directives Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/vdso: Replace hex int80 CFI annotations with GAS directives tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:10 +0200
[PATCH v2 02/36] x86/uaccess: __chk_range_not_ok is unlikely to return true Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
Re: [PATCH v2 02/36] x86/uaccess: __chk_range_not_ok is unlikely to return true Borislav Petkov <bp@alien8.de> - 2015-10-07 13:00 +0200
Re: [PATCH v2 02/36] x86/uaccess: __chk_range_not_ok is unlikely to return true Ingo Molnar <mingo@kernel.org> - 2015-10-07 18:30 +0200
[tip:x86/asm] x86/uaccess: Add unlikely() to __chk_range_not_ok() failure paths tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-07 18:20 +0200
[PATCH v2 06/36] x86/entry: Move lockdep_sys_exit to prepare_exit_to_usermode Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/entry, locking/lockdep: Move lockdep_sys_exit() to prepare_exit_to_usermode() tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-07 18:20 +0200
Re: [tip:x86/asm] x86/entry, locking/lockdep: Move lockdep_sys_exit() to prepare_exit_to_usermode() Peter Zijlstra <peterz@infradead.org> - 2015-10-08 11:00 +0200
Re: [tip:x86/asm] x86/entry, locking/lockdep: Move lockdep_sys_exit() to prepare_exit_to_usermode() Andy Lutomirski <luto@amacapital.net> - 2015-10-09 21:40 +0200
[PATCH v2 16/36] x86/entry/64/compat: Remove most of the fast system call machinery Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/entry/64/compat: Remove most of the fast system call machinery tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
[PATCH v2 22/36] x86/entry: Add C code for fast system call entries Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
Re: [PATCH v2 22/36] x86/entry: Add C code for fast system call entries Linus Torvalds <torvalds@linux-foundation.org> - 2015-10-06 10:30 +0200
Re: [PATCH v2 22/36] x86/entry: Add C code for fast system call entries Andy Lutomirski <luto@amacapital.net> - 2015-10-06 20:30 +0200
Re: [PATCH v2 22/36] x86/entry: Add C code for fast system call entries Linus Torvalds <torvalds@linux-foundation.org> - 2015-10-06 10:30 +0200
[tip:x86/asm] x86/entry: Add C code for fast system call entries tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
[PATCH v2 30/36] x86/entry: Make irqs_disabled checks in exit code depend on lockdep Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/entry: Make irqs_disabled checks in exit code depend on lockdep tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
[PATCH v2 15/36] x86/entry/64/compat: Remove audit optimizations Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
[tip:x86/asm] x86/entry/64/compat: Remove audit optimizations tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
[PATCH v2 32/36] x86/entry: Micro-optimize compat fast syscall arg fetch Andy Lutomirski <luto@kernel.org> - 2015-10-06 03:00 +0200
Re: [PATCH v2 32/36] x86/entry: Micro-optimize compat fast syscall arg fetch Ingo Molnar <mingo@kernel.org> - 2015-10-09 09:40 +0200
Re: [PATCH v2 32/36] x86/entry: Micro-optimize compat fast syscall arg fetch Andy Lutomirski <luto@amacapital.net> - 2015-10-09 21:30 +0200
Re: [PATCH v2 32/36] x86/entry: Micro-optimize compat fast syscall arg fetch Ingo Molnar <mingo@kernel.org> - 2015-10-10 11:10 +0200
[tip:x86/asm] x86/entry: Micro-optimize compat fast syscall arg fetch tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-09 15:20 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Linus Torvalds <torvalds@linux-foundation.org> - 2015-10-06 10:40 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Ingo Molnar <mingo@kernel.org> - 2015-10-06 11:00 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Andy Lutomirski <luto@amacapital.net> - 2015-10-06 20:30 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Ingo Molnar <mingo@kernel.org> - 2015-10-09 15:10 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Richard Weinberger <richard.weinberger@gmail.com> - 2015-10-12 20:40 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Andy Lutomirski <luto@amacapital.net> - 2015-10-12 20:50 +0200
Re: [PATCH v2 00/36] x86: Rewrite all syscall entries except native 64-bit Richard Weinberger <richard@nod.at> - 2015-10-12 23:10 +0200
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