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path: root/arch/x86/kernel/signal_64.c
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2008-11-26x86: signal: unify signal_{32|64}.cHiroshi Shimamoto
Impact: cleanup Unify signal_{32|64}.c! Mechanic unification - the two files are the same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-26x86: signal: unify signal_{32|64}.c, prepareHiroshi Shimamoto
Impact: cleanup Add #ifdef directive for 32-bit only code. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-26x86: signal: cosmetic unification of __setup_sigframe() and ↵Hiroshi Shimamoto
__setup_rt_sigframe() Impact: cleanup Add #ifdef directive to unify __setup_sigframe() and __setup_rt_sigframe(). Move them after {setup|restore}_sigcontext() declaration. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-26x86: signal: move {setup|restore}_sigcontext()Hiroshi Shimamoto
Impact: cleanup Move {setup|restore}_sigcontext() declaration onto head of file. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-23x86: signal: cosmetic unification of sys_rt_sigreturn()Hiroshi Shimamoto
Impact: cleanup Add #ifdef directive for unification. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-23x86: signal: cosmetic unification of sys_sigaltstack()Hiroshi Shimamoto
Impact: cleanup Add #ifdef directive for unification. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-23x86: signal: cosmetic unification of including headersHiroshi Shimamoto
Impact: cleanup Make the headers portion of signal_32.c and signal_64.c the same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-21x86: signal: rename COPY_SEG_STRICT to COPY_SEG_CPL3Hiroshi Shimamoto
Impact: cleanup Rename macro COPY_SEG_STRICT to COPY_SEG_CPL3, as suggested by hpa. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-08x86: signal: cosmetic unification of setup_sigcontext()Hiroshi Shimamoto
Impact: cleanup Make setup_sigcontext() same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: signal_64: make setup_sigcontext() similarHiroshi Shimamoto
Impact: cleanup remove passing task struct. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: signal_64: setup fpstate in setup_sigcontext()Hiroshi Shimamoto
Impact: cleanup set fpstate field of signal context at setup_sigcontext(). Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-04x86: signal_64: remove unused code in __setup_rt_frame()Hiroshi Shimamoto
Impact: cleanup sizeof(*set) is always 8 on x86_64. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86: signal: cosmetic unification of NR_restart_syscallHiroshi Shimamoto
Impact: cleanup Add #ifdef directive to unify NR_restart_syscall. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86: signal: cosmetic unification of macros for setup_rt_frame()Hiroshi Shimamoto
Impact: cleanup Add #ifdef directive for unification. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86: signal: cosmetic unification of signr_convert()Hiroshi Shimamoto
Impact: cleanup Make signr_convert() same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-27x86: signal_64.c: get_stack() doesn't need entire regsHiroshi Shimamoto
Impact: cleanup get_stack() uses sp only, entire regs is not needed. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-27x86: signal: cosmetic unification of restore_sigcontext()Hiroshi Shimamoto
Impact: cleanup Make restore_sigcontext() the same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03x86: signal: remove indent in restore_sigcontext()Hiroshi Shimamoto
remove braces and indent for flags and fpstate in restore_sigcontext(). Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03x86: signal: move macros out from restore_sigcontext()Hiroshi Shimamoto
move macros, COPY, COPY_SEG*, GET_SEG, out from restore_sigcontext(). x86_64: introduce COPY_SEG_STRICT for cs. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-25x86: signal: introduce helper macro is_ia32Hiroshi Shimamoto
Introduce new macro is_ia32 for unification of setup_rt_frame(). No effect in binary, compiler will optimize. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-25x86: signal_64.c: introduce helper function signr_convert()Hiroshi Shimamoto
This helper function is for unification of setup_rt_frame(). No effect in binary. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-24x86: signal: cosmetic unification of handle_signal()Hiroshi Shimamoto
Make handle_signal() same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-24x86: signal: cosmetic unification of do_notify_resume()Hiroshi Shimamoto
Make do_notify_resume() same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-24x86: signal: cosmetic unification of do_signal()Hiroshi Shimamoto
Make do_signal() same. Thia patch modifies only comments in signal_64.c. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-14x86: signal: introduce do_rt_sigreturn()Hiroshi Shimamoto
introduce do_rt_sigreturn(), to collect common part of sys_rt_sigreturn(). No change in functionality intended. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-14x86: signal: remove unneeded err handlingHiroshi Shimamoto
This patch eliminates unused or unneeded variable handling. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-14x86: signal: put give_sigsegv of setup frames togetherHiroshi Shimamoto
When setup frame fails, force_sigsegv is called and returns -EFAULT. There is similar code in ia32_setup_frame(), ia32_setup_rt_frame(), __setup_frame() and __setup_rt_frame(). Make them identical. No change in functionality intended. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-10x86: signal_64.c: make handle_signal() similarHiroshi Shimamoto
Make handle_signal() same as 32bit. No change in functionality intended. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-10x86: signal_64.c: arg for restore_i387_xstate() is void __user *Hiroshi Shimamoto
restore_i387_xstate() is declared as: int restore_i387_xstate(void __user *buf); so, make the variable buf void __user *. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-10x86: signal_64.c: clean up signal_fault()Hiroshi Shimamoto
clean up and make signal_fault() same as 32bit. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-06x86: signal: split out frame setupsHiroshi Shimamoto
Make setup_rt_frame() and split out frame setups from handle_signal(). This is for cosmetic unification of handle_signal(). Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-06x86: signal: make NR_restart_syscallHiroshi Shimamoto
make NR_restart_syscall macro for cosmetic unification of handle_signal(). Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-06Merge branch 'x86/cleanups' into x86/signalIngo Molnar
Conflicts: arch/x86/kernel/signal_64.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-06Merge branches 'x86/tracehook', 'x86/xsave' and 'x86/prototypes' into x86/signalIngo Molnar
Conflicts: arch/x86/kernel/signal_64.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-05Merge branch 'linus' into x86/tracehookIngo Molnar
2008-08-20Merge branch 'linus' into x86/cleanupsIngo Molnar
2008-08-14Merge commit 'v2.6.27-rc3' into x86/prototypesIngo Molnar
Conflicts: include/asm-x86/dma-mapping.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-14x86, xsave: remove the redundant access_ok() in setup_rt_frame()Suresh Siddha
save_i387_xstate() is already doing the required access_ok(). Remove the redundant access_ok() before it. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-31x86: coding style fixes to arch/x86/kernel/signal_64.cGustavo F. Padovan
Fix all errors and many warnings reported by checkpatch.pl without change signal_64.o arch/x86/kernel/signal_64.o text data bss dec hex filename 5143 0 8 5151 141f signal_64.o.after 5143 0 8 5151 141f signal_64.o.before md5: e68718092b3641cb27e79e55ce57e3ad signal_64.o.after e68718092b3641cb27e79e55ce57e3ad signal_64.o.before Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-30x86, xsave: save/restore the extended state context in sigframeSuresh Siddha
On cpu's supporting xsave/xrstor, fpstate pointer in the sigcontext, will include the extended state information along with fpstate information. Presence of extended state information is indicated by the presence of FP_XSTATE_MAGIC1 at fpstate.sw_reserved.magic1 and FP_XSTATE_MAGIC2 at fpstate + (fpstate.sw_reserved.extended_size - FP_XSTATE_MAGIC2_SIZE). Extended feature bit mask that is saved in the memory layout is represented by the fpstate.sw_reserved.xstate_bv For RT signal frames, UC_FP_XSTATE in the uc_flags also indicate the presence of extended state information in the sigcontext's fpstate pointer. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-30x86, xsave: reorganization of signal save/restore fpstate code layoutSuresh Siddha
move 64bit routines that saves/restores fpstate in/from user stack from signal_64.c to xsave.c restore_i387_xstate() now handles the condition when user passes NULL fpstate. Other misc changes for prepartion of xsave/xrstor sigcontext support. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-30x86, xsave: dynamically allocate sigframes fpstate instead of static allocationSuresh Siddha
dynamically allocate fpstate on the stack, instead of static allocation in the current sigframe layout on the user stack. This will allow the fpstate structure to grow in the future, which includes extended state information supporting xsave/xrstor. signal handlers will be able to access the fpstate pointer from the sigcontext structure asusual, with no change. For the non RT sigframe's (which are supported only for 32bit apps), current static fpstate layout in the sigframe will be unused(so that we don't change the extramask[] offset in the sigframe and thus prevent breaking app's which modify extramask[]). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-26x86: tracehook: TIF_NOTIFY_RESUMERoland McGrath
This adds TIF_NOTIFY_RESUME support for x86, both 64-bit and 32-bit. When set, we call tracehook_notify_resume() on the way to user mode. Signed-off-by: Roland McGrath <roland@redhat.com>
2008-07-26x86 signals: use asm/syscall.hRoland McGrath
Replace local inlines with the asm/syscall.h interfaces that do the same things. Signed-off-by: Roland McGrath <roland@redhat.com>
2008-07-26x86: tracehook_signal_handlerRoland McGrath
This makes the x86 signal handling code use tracehook_signal_handler() in place of calling into ptrace guts. The call is moved after the sa_mask processing, but there is no other change. This cleanup doesn't matter to existing debuggers, but is the sensible thing: have all facets of the handler setup complete before the debugger inspects the task again. Signed-off-by: Roland McGrath <roland@redhat.com>
2008-07-26x64, fpu: fix possible FPU leakage in error conditionsSuresh Siddha
On Thu, Jul 24, 2008 at 03:43:44PM -0700, Linus Torvalds wrote: > So how about this patch as a starting point? This is the RightThing(tm) to > do regardless, and if it then makes it easier to do some other cleanups, > we should do it first. What do you think? restore_fpu_checking() calls init_fpu() in error conditions. While this is wrong(as our main intention is to clear the fpu state of the thread), this was benign before commit 92d140e21f1 ("x86: fix taking DNA during 64bit sigreturn"). Post commit 92d140e21f1, live FPU registers may not belong to this process at this error scenario. In the error condition for restore_fpu_checking() (especially during the 64bit signal return), we are doing init_fpu(), which saves the live FPU register state (possibly belonging to some other process context) into the thread struct (through unlazy_fpu() in init_fpu()). This is wrong and can leak the FPU data. For the signal handler restore error condition in restore_i387(), clear the fpu state present in the thread struct(before ultimately sending a SIGSEGV for badframe). For the paranoid error condition check in math_state_restore(), send a SIGSEGV, if we fail to restore the state. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: <stable@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-24x86-64: Clean up 'save/restore_i387()' usageLinus Torvalds
Suresh Siddha wants to fix a possible FPU leakage in error conditions, but the fact that save/restore_i387() are inlines in a header file makes that harder to do than necessary. So start off with an obvious cleanup. This just moves the x86-64 version of save/restore_i387() out of the header file, and moves it to the only file that it is actually used in: arch/x86/kernel/signal_64.c. So exposing it in a header file was wrong to begin with. [ Side note: I'd like to fix up some of the games we play with the 32-bit version of these functions too, but that's a separate matter. The 32-bit versions are shared - under different names at that! - by both the native x86-32 code and the x86-64 32-bit compatibility code ] Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-23Merge branch 'sched/for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: hrtick_enabled() should use cpu_active() sched, x86: clean up hrtick implementation sched: fix build error, provide partition_sched_domains() unconditionally sched: fix warning in inc_rt_tasks() to not declare variable 'rq' if it's not needed cpu hotplug: Make cpu_active_map synchronization dependency clear cpu hotplug, sched: Introduce cpu_active_map and redo sched domain managment (take 2) sched: rework of "prioritize non-migratable tasks over migratable ones" sched: reduce stack size in isolated_cpu_setup() Revert parts of "ftrace: do not trace scheduler functions" Fixed up conflicts in include/asm-x86/thread_info.h (due to the TIF_SINGLESTEP unification vs TIF_HRTICK_RESCHED removal) and kernel/sched_fair.c (due to cpu_active_map vs for_each_cpu_mask_nr() introduction).
2008-07-22x86: Introducing asm/syscalls.hJaswinder Singh
Declaring arch-dependent syscalls for x86 architecture Signed-off-by: Jaswinder Singh <jaswinder@infradead.org>
2008-07-20sched, x86: clean up hrtick implementationPeter Zijlstra
random uvesafb failures were reported against Gentoo: http://bugs.gentoo.org/show_bug.cgi?id=222799 and Mihai Moldovan bisected it back to: > 8f4d37ec073c17e2d4aa8851df5837d798606d6f is first bad commit > commit 8f4d37ec073c17e2d4aa8851df5837d798606d6f > Author: Peter Zijlstra <a.p.zijlstra@chello.nl> > Date: Fri Jan 25 21:08:29 2008 +0100 > > sched: high-res preemption tick Linus suspected it to be hrtick + vm86 interaction and observed: > Btw, Peter, Ingo: I think that commit is doing bad things. They aren't > _incorrect_ per se, but they are definitely bad. > > Why? > > Using random _TIF_WORK_MASK flags is really impolite for doing > "scheduling" work. There's a reason that arch/x86/kernel/entry_32.S > special-cases the _TIF_NEED_RESCHED flag: we don't want to exit out of > vm86 mode unnecessarily. > > See the "work_notifysig_v86" label, and how it does that > "save_v86_state()" thing etc etc. Right, I never liked having to fiddle with those TIF flags. Initially I needed it because the hrtimer base lock could not nest in the rq lock. That however is fixed these days. Currently the only reason left to fiddle with the TIF flags is remote wakeups. We cannot program a remote cpu's hrtimer. I've been thinking about using the new and improved IPI function call stuff to implement hrtimer_start_on(). However that does require that smp_call_function_single(.wait=0) works from interrupt context - /me looks at the latest series from Jens - Yes that does seem to be supported, good. Here's a stab at cleaning this stuff up ... Mihai reported test success as well. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: Mihai Moldovan <ionic@ionic.de> Cc: Michal Januszewski <spock@gentoo.org> Cc: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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