From af65d64845a90c8f2fc90b97e2148ff74672e979 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 30 Jan 2008 13:30:43 +0100 Subject: x86 vDSO: consolidate vdso32 This makes x86_64's ia32 emulation support share the sources used in the 32-bit kernel for the 32-bit vDSO and much of its setup code. The 32-bit vDSO mapping now behaves the same on x86_64 as on native 32-bit. The abi.syscall32 sysctl on x86_64 now takes the same values that vm.vdso_enabled takes on the 32-bit kernel. That is, 1 means a randomized vDSO location, 2 means the fixed old address. The CONFIG_COMPAT_VDSO option is now available to make this the default setting, the same meaning it has for the 32-bit kernel. (This does not affect the 64-bit vDSO.) The argument vdso32=[012] can be used on both 32-bit and 64-bit kernels to set this paramter at boot time. The vdso=[012] argument still does this same thing on the 32-bit kernel. Signed-off-by: Roland McGrath Cc: Andrew Morton Cc: Linus Torvalds Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/vdso/vdso32.S | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) (limited to 'arch/x86/vdso/vdso32.S') diff --git a/arch/x86/vdso/vdso32.S b/arch/x86/vdso/vdso32.S index cab020c99c3d..1e36f72cab86 100644 --- a/arch/x86/vdso/vdso32.S +++ b/arch/x86/vdso/vdso32.S @@ -2,14 +2,18 @@ __INITDATA - .globl vsyscall_int80_start, vsyscall_int80_end -vsyscall_int80_start: + .globl vdso32_default_start, vdso32_default_end +vdso32_default_start: +#ifdef CONFIG_X86_32 .incbin "arch/x86/vdso/vdso32-int80.so" -vsyscall_int80_end: +#else + .incbin "arch/x86/vdso/vdso32-syscall.so" +#endif +vdso32_default_end: - .globl vsyscall_sysenter_start, vsyscall_sysenter_end -vsyscall_sysenter_start: + .globl vdso32_sysenter_start, vdso32_sysenter_end +vdso32_sysenter_start: .incbin "arch/x86/vdso/vdso32-sysenter.so" -vsyscall_sysenter_end: +vdso32_sysenter_end: __FINIT -- cgit v1.2.3