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x86/vdso: Remove runtime 32-bit vDSO selection

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32-bit userspace will now always see the same vDSO, which is
exactly what used to be the int80 vDSO.  Subsequent patches will
clean it up and make it support SYSENTER and SYSCALL using
alternatives.

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/e7e6b3526fa442502e6125fe69486aab50813c32.1444091584.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Lutomirski
2015-10-05 17:47:56 -07:00
committed by Ingo Molnar
parent b611acf473
commit 0a6d1fa0d2
12 changed files with 21 additions and 279 deletions
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9
arch/x86/include/asm/vdso.h
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@@ -26,7 +26,6 @@ struct vdso_image {
long sym___kernel_sigreturn;
long sym___kernel_rt_sigreturn;
long sym___kernel_vsyscall;
long sym_VDSO32_SYSENTER_RETURN;
};
#ifdef CONFIG_X86_64
@@ -38,13 +37,7 @@ extern const struct vdso_image vdso_image_x32;
#endif
#if defined CONFIG_X86_32 || defined CONFIG_COMPAT
extern const struct vdso_image vdso_image_32_int80;
#ifdef CONFIG_COMPAT
extern const struct vdso_image vdso_image_32_syscall;
#endif
extern const struct vdso_image vdso_image_32_sysenter;
extern const struct vdso_image *selected_vdso32;
extern const struct vdso_image vdso_image_32;
#endif
extern void __init init_vdso_image(const struct vdso_image *image);