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* x86: no stack protector for vdsoTejun Heo2009-02-101-1/+1
| | | | | | | Impact: avoid crash on vsyscall Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86_64: further cleanup of 32-bit compat syscall mechanismsJeremy Fitzhardinge2008-07-161-1/+1
| | | | | | | | | | | | | AMD only supports "syscall" from 32-bit compat usermode. Intel and Centaur(?) only support "sysenter" from 32-bit compat usermode. Set the X86 feature bits accordingly, and set up the vdso in accordance with those bits. On the offchance we run on in a 64-bit environment which supports neither syscall nor sysenter from 32-bit mode, then fall back to the int $0x80 vdso. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86 vDSO: compile with -g, 64-bitRoland McGrath2008-04-191-1/+2
| | | | | | | | | | | | The 64-bit vDSO's sources are compiled with -g0 for no good reason. Using -g when enabled lets their separate debug files be used at runtime via build ID matching, same as we can see 32-bit vDSO's assembly sources. Signed-off-by: Roland McGrath <roland@redhat.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: include mach_apic.h in smpboot_64.c and smpboot.cGlauber de Oliveira Costa2008-04-171-1/+1
| | | | | | | | | | | After the inclusion, a lot of files needs fixing for conflicts, some of them in the headers themselves, to accomodate for both i386 and x86_64 versions. [ mingo@elte.hu: build fix ] Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 vdso: fix build locale dependencyRoland McGrath2008-02-291-2/+4
| | | | | | | | | | | | | | | Priit Laes discovered that the sed command processing nm output was sensitive to locale settings. This was addressed in commit 03994f01e8b72b3d01fd3d09d1cc7c9f421a727c by using [:alnum:] in place of [a-zA-Z0-9]. But that solution too is locale-dependent and may not always match the identifiers it needs to. The better fix is just to run sed et al with a fixed locale setting in all builds. Signed-off-by: Roland McGrath <roland@redhat.com> CC: Priit Laes <plaes@plaes.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix build on non-C locales.Priit Laes2008-02-261-1/+1
| | | | | | | | | For some locales regex range [a-zA-Z] does not work as it is supposed to. so we have to use [:alnum:] and [:xdigit:] to make it work as intended. [1] http://en.wikipedia.org/wiki/Estonian_alphabet Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: vdso_install fixRoland McGrath2008-02-121-10/+12
| | | | | | | | | | The makefile magic for installing the 32-bit vdso images on disk had a little error. A single-line change would fix that bug, but this does a little more to reduce the error-prone duplication of this bit of makefile variable magic. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86: teach vdso to cleanSam Ravnborg2008-01-301-0/+2
| | | | | | | | | | | | A few files remained after 'make clean' in arch/x86/vdso/. Teach vdso to clean up those files in a bit brutal fashion. The filenames are just hardcoded in the Makefile. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roland McGrath <roland@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: makefile cleanupRoland McGrath2008-01-301-15/+4Star
| | | | | | | | | | | | This cleans up the arch/x86/vdso/Makefile rules for vdso.so to share more code with the vdso32-*.so rules and remove old cruft. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: consolidate vdso32Roland McGrath2008-01-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | 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 <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: ia32 vdso32-syscall buildRoland McGrath2008-01-301-0/+1
| | | | | | | | | | | | | This puts the syscall version of the 32-bit vDSO in arch/x86/vdso/vdso32/ for 64-bit IA32 support. This is not used yet, but it paves the way for consolidating the 32-bit vDSO source and build logic all in one place. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: vdso32 setupRoland McGrath2008-01-301-1/+1
| | | | | | | | | | | | | | This moves arch/x86/kernel/sysenter_32.c to arch/x86/vdso/vdso32-setup.c, keeping all the code relating only to vDSO magic in the vdso/ subdirectory. This is a pure renaming, but it paves the way to consolidating the code for dealing with 32-bit vDSOs across CONFIG_X86_32 and CONFIG_IA32_EMULATION. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: i386 vdso32Roland McGrath2008-01-301-2/+6
| | | | | | | | | | | | This makes the i386 kernel use the new vDSO build in arch/x86/vdso/vdso32/ to replace the old one from arch/x86/kernel/. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: vdso32 buildRoland McGrath2008-01-301-3/+75
| | | | | | | | | | | | | | This builds the 32-bit vDSO images in the arch/x86/vdso subdirectory. Nothing uses the images yet, but this paves the way for consolidating the vDSO build logic all in one place. The new images use a linker script sharing the layout parts from vdso-layout.lds.S with the 64-bit vDSO. A new vdso32-syms.lds is generated in the style of vdso-syms.lds. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: remove vdso-syms.oRoland McGrath2008-01-301-13/+2Star
| | | | | | | | | | | Get rid of vdso-syms.o from the kernel link. We don't need it any more. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: use vdso-syms.ldsRoland McGrath2008-01-301-2/+1Star
| | | | | | | | | | | | | | | This patch changes the kernel's references to addresses in the vDSO image to be based on the symbols defined by vdso-syms.lds instead of the old vdso-syms.o symbols. This is all wrapped up in a macro defined by the new asm-x86/vdso.h header; that's the only place in the kernel source that has to know the details of the scheme for getting vDSO symbol values. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86 vDSO: generate vdso-syms.ldsRoland McGrath2008-01-301-0/+14
| | | | | | | | | | | | | | This patch adds a new way of extracting symbols from the built vDSO image. This is much simpler and less fragile than using ld -R; it removes the need to control the DSO layout quite so exactly. I was clearly unduly distracted by clever ld uses when I did the original vDSO implementation. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: do not use $(ARCH) when not neededSam Ravnborg2007-11-121-1/+1
| | | | | | | | | | | For x86 ARCH may say i386 or x86_64 and soon x86. Rely on CONFIG_X64_32 to select between 32/64 or just hardcode the value as appropriate. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com>
* x86: Install unstripped copy of 64bit vdso to diskRoland McGrath2007-10-171-1/+16
| | | | | | | | | | | | | | | This keeps an unstripped copy of the 64bit vDSO images built before they are stripped and embedded in the kernel. The unstripped copies get installed in $(MODLIB)/vdso/ by "make install" (or you can explicitly use the subtarget "make vdso_install"). These files can be useful when they contain source-level debugging information. [ tglx: arch/x86 adaptation ] Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* kbuild: enable 'make CFLAGS=...' to add additional options to CCSam Ravnborg2007-10-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | The variable CFLAGS is a wellknown variable and the usage by kbuild may result in unexpected behaviour. On top of that several people over time has asked for a way to pass in additional flags to gcc. This patch replace use of CFLAGS with KBUILD_CFLAGS all over the tree and enabling one to use: make CFLAGS=... to specify additional gcc commandline options. One usecase is when trying to find gcc bugs but other use cases has been requested too. Patch was tested on following architectures: alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k Test was simple to do a defconfig build, apply the patch and check that nothing got rebuild. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* x86_64: move vdsoThomas Gleixner2007-10-111-0/+49
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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