Peter Oberparleiter f386c61fe1 gcov: exclude code operating in userspace from profiling ...

Fix for this issue on x86_64:

rostedt@goodmis.org wrote:
> On bootup of the latest kernel my init segfaults. Debugging it,
> I found  that vread_tsc (a vsyscall) increments some strange
> kernel memory:
>
> 0000000000000000 <vread_tsc>:
>    0:   55                      push   %rbp
>    1:   48 ff 05 00 00 00 00    incq   0(%rip)
>                         # 8 <vread_tsc+0x8>
>                         4: R_X86_64_PC32        .bss+0x3c
>    8:   48 89 e5                mov    %rsp,%rbp
>    b:   66 66 90                xchg   %ax,%ax
>    e:   48 ff 05 00 00 00 00    incq   0(%rip)
>                         # 15 <vread_tsc+0x15>
>                         11: R_X86_64_PC32       .bss+0x44
>   15:   66 66 90                xchg   %ax,%ax
>   18:   48 ff 05 00 00 00 00    incq   0(%rip)
>                         # 1f <vread_tsc+0x1f>
>                         1b: R_X86_64_PC32       .bss+0x4c
>   1f:   0f 31                   rdtsc
>
>
> Those "incq" is very bad to happen in vsyscall memory, since
> userspace can not modify it. You need to make something prevent
> profiling of vsyscall  memory (like I do with ftrace).

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-07-06 13:57:03 -07:00

..

acpi

Merge branches 'acerhdf', 'acpi-pci-bind', 'bjorn-pci-root', 'bugzilla-12904', 'bugzilla-13121', 'bugzilla-13396', 'bugzilla-13533', 'bugzilla-13612', 'c3_lock', 'hid-cleanups', 'misc-2.6.31', 'pdc-leak-fix', 'pnpacpi', 'power_nocheck', 'thinkpad_acpi', 'video' and 'wmi' into release

2009-06-24 01:19:50 -04:00

apic

Intel-IOMMU, intr-remap: source-id checking

2009-06-23 22:09:17 +01:00

cpu

Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-30 19:02:59 -07:00

.gitignore

…

alternative.c

x86: expand irq-off region in text_poke()

2009-03-10 16:24:23 +01:00

amd_iommu_init.c

amd-iommu: resume cleanup

2009-06-16 10:19:16 +02:00

amd_iommu.c

amd-iommu: flush domain tlb when attaching a new device

2009-06-15 15:42:00 +02:00

aperture_64.c

aperture_64.c: clarify that too small aperture is valid reason for this code

2008-11-28 15:24:39 +01:00

apm_32.c

PM core: rename suspend and resume functions

2009-06-12 21:32:31 +02:00

asm-offsets_32.c

lguest: optimize by coding restore_flags and irq_enable in assembler.

2009-06-12 22:27:03 +09:30

asm-offsets_64.c

x86, boot: make kernel_alignment adjustable; new bzImage fields

2009-05-11 17:44:39 -07:00

asm-offsets.c

…

audit_64.c

…

bios_uv.c

x86, UV: system table in bios accessed after unmap

2009-04-03 19:25:57 +02:00

bootflag.c

…

check.c

x86: fix 64k corruption-check

2009-03-15 07:03:15 +01:00

cpuid.c

Driver Core: x86: add nodename for cpuid and msr drivers.

2009-06-15 21:30:25 -07:00

crash_dump_32.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash_dump_64.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash.c

x86: disable IOMMUs on kernel crash

2009-06-15 15:20:40 +02:00

doublefault_32.c

x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2

2008-10-13 10:33:15 +02:00

ds_selftest.c

x86, ds: fix buffer alignment in debug store selftest

2009-04-24 10:18:51 +02:00

ds_selftest.h

x86, bts: cleanups

2009-03-13 11:57:22 +01:00

ds.c

x86, ds: support Core i7

2009-04-07 13:36:36 +02:00

dumpstack_32.c

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

dumpstack_64.c

x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit.

2009-01-19 00:38:58 +09:00

dumpstack.c

x86: Add sysctl to allow panic on IOCK NMI error

2009-06-25 22:06:11 +02:00

dumpstack.h

x86: avoid multiple declaration of kstack_depth_to_print

2009-04-14 11:45:33 +02:00

e820.c

x86: add boundary check for 32bit res before expand e820 resource to alignment

2009-07-02 12:11:12 -07:00

early_printk.c

x86: properly __init-annotate recent early_printk additions

2009-03-13 02:37:18 +01:00

early-quirks.c

x86 early quirks: eliminate unused function

2009-04-08 14:16:32 +02:00

efi_32.c

x86: fix i486 suspend to disk CR4 oops

2008-08-18 08:50:19 +02:00

efi_64.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

efi_stub_32.S

Merge branch 'x86/asm' into x86/mm

2009-02-25 08:27:46 +01:00

efi_stub_64.S

x86: efi_stub_32,64 - add missing ENDPROCs

2009-02-24 18:08:40 +01:00

efi.c

x86: correct the conversion of EFI memory types

2009-06-16 17:47:32 -07:00

entry_32.S

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 10:56:46 -07:00

entry_64.S

function-graph: add stack frame test

2009-06-18 18:40:18 -04:00

ftrace.c

function-graph: add stack frame test

2009-06-18 18:40:18 -04:00

geode_32.c

…

head32.c

x86-32: use brk segment for allocating initial kernel pagetable

2009-03-14 17:23:47 -07:00

head64.c

x86: add brk allocation for very, very early allocations

2009-03-14 15:37:14 -07:00

head_32.S

x86: de-assembler-ize asm/desc.h

2009-06-17 21:35:10 -07:00

head_64.S

x86: de-assembler-ize asm/desc.h

2009-06-17 21:35:10 -07:00

head.c

x86, debug: remove EBDA debug printk

2008-12-12 11:08:42 +01:00

hpet.c

x86: hpet: Mark per cpu interrupts IRQF_TIMER to prevent resume failure

2009-06-14 18:24:29 +02:00

i386_ksyms_32.c

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20 18:27:03 +02:00

i387.c

x86, math-emu: fix init_fpu for task != current

2009-03-04 20:33:16 +01:00

i8237.c

i8327: fix outb() parameter order

2009-02-10 13:13:23 +01:00

i8253.c

time: move PIT_TICK_RATE to linux/timex.h

2009-06-16 19:47:27 -07:00

i8259.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

init_task.c

mm: consolidate init_mm definition

2009-06-16 19:47:28 -07:00

io_delay.c

x86: io_delay.c cleanup

2009-03-21 16:57:04 +05:30

ioport.c

x86-32: use non-lazy io bitmap context switching

2009-03-02 12:07:48 +01:00

irq_32.c

Merge branch 'tj-percpu' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu

2009-02-24 21:52:45 +01:00

irq_64.c

x86: unify do_IRQ()

2009-02-09 12:16:05 +01:00

irq.c

Merge branch 'linus' into x86/mce3

2009-06-11 23:31:52 +02:00

irqinit.c

Merge branch 'linus' into x86/mce3

2009-06-11 23:31:52 +02:00

k8.c

x86, gart: fix gart detection for Fam11h CPUs

2008-10-28 17:10:27 +01:00

kdebugfs.c

x86: kdebugfs.c cleanup

2009-03-21 16:55:45 +05:30

kgdb.c

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10 15:49:10 -07:00

kprobes.c

Merge branch 'tracing/core-v2' into tracing-for-linus

2009-04-02 00:49:02 +02:00

kvm.c

Merge branch 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2009-06-11 10:03:30 -07:00

kvmclock.c

clocksource: pass clocksource to read() callback

2009-04-21 13:41:47 -07:00

ldt.c

x86: ldt.c fix style problems

2009-01-02 17:46:24 +01:00

machine_kexec_32.c

x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP

2009-05-07 22:01:05 -07:00

machine_kexec_64.c

x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP

2009-05-07 22:01:05 -07:00

Makefile

gcov: exclude code operating in userspace from profiling

2009-07-06 13:57:03 -07:00

mca_32.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

mfgpt_32.c

cpumask: remove references to struct irqaction's mask field.

2009-03-30 22:05:14 +10:30

microcode_amd.c

x86, microcode: Simplify vfree() use

2009-06-07 16:35:11 +02:00

microcode_core.c

Driver Core: misc: add nodename support for misc devices.

2009-06-15 21:30:25 -07:00

microcode_intel.c

x86: microcode: use smp_call_function_single instead of set_cpus_allowed, cleanup of synchronization logic

2009-05-12 10:36:44 +02:00

mmconf-fam10h_64.c

x86: move various CPU initialization objects into .cpuinit.rodata

2009-03-12 13:13:07 +01:00

module.c

module: cleanup FIXME comments about trimming exception table entries.

2009-06-12 21:47:05 +09:30

mpparse.c

x86, irq: don't call mp_config_acpi_gsi() if update_mptable is not enabled

2009-05-18 09:33:29 +02:00

msr.c

Driver Core: x86: add nodename for cpuid and msr drivers.

2009-06-15 21:30:25 -07:00

olpc.c

x86, olpc: fix model detection without OFW

2009-02-14 23:05:25 +01:00

paravirt_patch_32.c

x86/pvops: add a paravirt_ident functions to allow special patching

2009-01-30 14:51:44 -08:00

paravirt_patch_64.c

x86/pvops: add a paravirt_ident functions to allow special patching

2009-01-30 14:51:44 -08:00

paravirt-spinlocks.c

x86: remove byte locks

2009-01-20 17:14:28 +01:00

paravirt.c

Merge branch 'x86-xen-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10 16:16:27 -07:00

pci-calgary_64.c

x86: calgary: remove IOMMU_DEBUG

2009-04-14 13:03:36 +02:00

pci-dma.c

intel-iommu: Make iommu=pt work on i386 too

2009-07-01 18:56:16 +01:00

pci-gart_64.c

x86: enable GART-IOMMU only after setting up protection methods

2009-06-06 09:42:09 +02:00

pci-nommu.c

dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

2009-04-07 08:31:11 -07:00

pci-swiotlb.c

Merge git://git.infradead.org/~dwmw2/iommu-2.6.31

2009-06-22 21:38:22 -07:00

pcspeaker.c

x86: use platform_device_register_simple()

2008-09-22 12:58:36 +02:00

pmtimer_64.c

…

probe_roms_32.c

x86: move mach-default/*.h files to asm/

2009-01-29 14:16:51 +01:00

process_32.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10 19:53:40 -07:00

process_64.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10 19:53:40 -07:00

process.c

kmemcheck: add mm functions

2009-06-15 12:40:03 +02:00

ptrace.c

x86, bts, mm: clean up buffer allocation

2009-04-24 10:18:52 +02:00

pvclock.c

x86: pvclock: fix shadowed variable warning

2008-10-15 14:25:14 +02:00

quirks.c

Merge branch 'linus' into x86/cpu

2009-06-07 12:22:15 +02:00

reboot_fixups_32.c

…

reboot.c

x86: Add quirk for reboot stalls on a Dell Optiplex 360

2009-06-07 15:51:20 +02:00

relocate_kernel_32.S

x86, kexec: fix kexec x86 coding style

2009-03-10 18:13:25 -07:00

relocate_kernel_64.S

x86, kexec: x86_64: add kexec jump support for x86_64

2009-03-10 18:13:25 -07:00

rtc.c

x86: rtc.c cleanup

2009-03-21 16:56:37 +05:30

scx200_32.c

…

setup_percpu.c

x86: ensure percpu lpage doesn't consume too much vmalloc space

2009-06-22 11:56:24 +09:00

setup.c

x86: Move init_gbpages() to setup_arch()

2009-06-23 10:33:32 +02:00

signal.c

Merge branch 'linus' into x86/mce3

2009-06-11 23:31:52 +02:00

smp.c

Merge branch 'linus' into x86/mce3

2009-06-11 23:31:52 +02:00

smpboot.c

x86: make zap_low_mapping could be used early

2009-06-12 13:50:24 +03:00

stacktrace.c

x86: add save_stack_trace_bp() for tracing from a specific stack frame

2009-06-12 23:01:05 +02:00

step.c

…

sys_i386_32.c

…

sys_x86_64.c

Merge branches 'x86/alternatives', 'x86/cleanups', 'x86/commandline', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/doc', 'x86/exports', 'x86/fpu', 'x86/gart', 'x86/idle', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/oprofile', 'x86/paravirt', 'x86/reboot', 'x86/sparse-fixes', 'x86/tsc', 'x86/urgent' and 'x86/vmalloc' into x86-v28-for-linus-phase1

2008-10-06 18:17:07 +02:00

syscall_64.c

x86: Fix ASM_X86__ header guards

2008-10-22 22:55:23 -07:00

syscall_table_32.S

Merge branch 'core/signal' into perfcounters/core

2009-04-30 21:16:49 +02:00

tce_64.c

…

test_nx.c

…

test_rodata.c

…

time_32.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

time_64.c

cpumask: remove references to struct irqaction's mask field.

2009-03-30 22:05:14 +10:30

tlb_uv.c

x86: Fix uv bau sending buffer initialization

2009-06-24 17:33:58 +02:00

tls.c

…

tls.h

…

topology.c

x86: topology.c cleanup

2009-03-21 16:55:24 +05:30

trampoline_32.S

x86: use _types.h headers in asm where available

2009-02-13 11:35:01 -08:00

trampoline_64.S

x86: use _types.h headers in asm where available

2009-02-13 11:35:01 -08:00

trampoline.c

x86: change static allocation of trampoline area

2008-12-08 13:49:45 +01:00

traps.c

x86: Add sysctl to allow panic on IOCK NMI error

2009-06-25 22:06:11 +02:00

tsc_sync.c

x86: clean up arch/x86/kernel/tsc_sync.c a bit

2009-05-07 09:32:10 +02:00

tsc.c

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-20 10:57:40 -07:00

uv_irq.c

x86, apic: remove genapic.h

2009-02-17 17:52:44 +01:00

uv_sysfs.c

x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems

2009-04-08 14:58:10 +02:00

uv_time.c

uv_time: add parameter to uv_read_rtc()

2009-04-22 17:41:25 +02:00

verify_cpu_64.S

…

visws_quirks.c

x86: convert obsolete irq_desc_t typedef to struct irq_desc

2009-03-11 09:49:01 +01:00

vm86_32.c

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-06-10 16:15:14 -07:00

vmi_32.c

Merge commit 'origin/master' into for-linus/xen/master

2009-04-07 13:34:16 -07:00

vmiclock_32.c

clocksource: pass clocksource to read() callback

2009-04-21 13:41:47 -07:00

vmlinux.lds.S

x86: Provide _sdata in the vmlinux.lds.S file

2009-06-12 09:21:33 +02:00

vsmp_64.c

Revert "x86: don't compile vsmp_64 for 32bit"

2009-03-25 21:34:28 +01:00

vsyscall_64.c

x86: move rdtsc_barrier() into the TSC vread method

2009-05-28 14:15:54 +02:00

x8664_ksyms_64.c

x86: convert pda ops to wrappers around x86 percpu accessors

2009-01-16 14:20:22 +01:00

xsave.c

x86-64: fix FPU corruption with signals and preemption

2009-04-20 14:33:00 -07:00