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9960efeb80
linux-next/arch/x86/kernel
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Steven Rostedt (Red Hat) 9960efeb80 ftrace/x86: Add frames pointers to trampoline as necessary 
When CONFIG_FRAME_POINTERS are enabled, it is required that the
ftrace_caller and ftrace_regs_caller trampolines set up frame pointers
otherwise a stack trace from a function call wont print the functions
that called the trampoline. This is due to a check in
__save_stack_address():

 #ifdef CONFIG_FRAME_POINTER
	if (!reliable)
		return;
 #endif

The "reliable" variable is only set if the function address is equal to
contents of the address before the address the frame pointer register
points to. If the frame pointer is not set up for the ftrace caller
then this will fail the reliable test. It will miss the function that
called the trampoline. Worse yet, if fentry is used (gcc 4.6 and
beyond), it will also miss the parent, as the fentry is called before
the stack frame is set up. That means the bp frame pointer points
to the stack of just before the parent function was called.

Link: http://lkml.kernel.org/r/20141119034829.355440340@goodmis.org

Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: stable@vger.kernel.org # 3.7+
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-11-19 15:24:31 -05:00
..
acpi Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-13 18:23:32 -06:00
apic Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
cpu Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
kprobes kprobes/x86: Free 'optinsn' cache when range check fails 2014-08-27 20:24:32 +02:00
.gitignore
alternative.c kprobes, x86: Allow kprobes on text_poke/hw_breakpoint 2014-04-24 10:03:02 +02:00
amd_gart_64.c x86: enable DMA CMA with swiotlb 2014-06-04 16:53:57 -07:00
amd_nb.c A bunch of EDAC updates all over the place: 2014-04-01 13:54:00 -07:00
apb_timer.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
aperture_64.c x86/gart: Tidy messages and add bridge device info 2014-05-23 10:47:19 -06:00
apm_32.c x86: Remove unused variable "polling" 2014-07-16 12:58:47 +02:00
asm-offsets_32.c x86: Get rid of ->hard_math and all the FPU asm fu 2013-06-06 14:32:04 -07:00
asm-offsets_64.c x86, gdt, hibernate: Store/load GDT for hibernate path. 2013-05-02 11:27:35 -07:00
asm-offsets.c sched, x86: Provide a per-cpu preempt_count implementation 2013-09-25 14:07:57 +02:00
audit_64.c
bootflag.c
check.c x86/mm: memblock: switch to use NUMA_NO_NODE 2014-01-21 16:19:47 -08:00
cpuid.c x86, cpuid: Fix CPU hotplug callback registration 2014-03-20 13:43:42 +01:00
crash_dump_32.c
crash_dump_64.c
crash.c kexec: check if crashk_res_low exists when exclude it from crash mem ranges 2014-10-14 02:18:21 +02:00
devicetree.c x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled 2014-06-21 23:05:44 +02:00
doublefault.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
dumpstack_32.c Merge branch 'x86-threadinfo-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-01 10:17:18 -07:00
dumpstack_64.c x86: Fix dumpstack_64 irq stack handling 2014-04-02 11:46:50 -07:00
dumpstack.c kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation 2014-04-24 10:26:38 +02:00
e820.c x86/mm, hibernate: Do not assume the first e820 area to be RAM 2014-09-16 09:54:31 +02:00
early_printk.c Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-12 11:12:22 +09:00
early-quirks.c Merge commit '9e9a928eed8796a0a1aaed7e0b676db86ba84594' into drm-next 2014-06-05 20:28:59 +10:00
entry_32.S Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
entry_64.S audit: x86: drop arch from __audit_syscall_entry() interface 2014-09-23 16:21:28 -04:00
espfix_64.c x86/espfix/xen: Fix allocation of pages for paravirt page tables 2014-07-14 13:47:32 -07:00
ftrace.c ftrace: Add more information to ftrace_bug() output 2014-11-11 12:42:13 -05:00
head32.c asmlinkage, x86: Add explicit __visible to arch/x86/* 2014-05-05 16:07:44 -07:00
head64.c kernel/printk: use symbolic defines for console loglevels 2014-06-04 16:54:17 -07:00
head_32.S x86: fix compile error due to X86_TRAP_NMI use in asm files 2014-03-07 18:58:40 -08:00
head_64.S x86: fix compile error due to X86_TRAP_NMI use in asm files 2014-03-07 18:58:40 -08:00
head.c x86: Make sure we can boot in the case the BDA contains pure garbage 2013-02-27 13:38:57 -08:00
hpet.c Merge branch 'x86/vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-05 08:05:29 -07:00
hw_breakpoint.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
i386_ksyms_32.c sched, x86: Optimize the preempt_schedule() call 2013-09-25 14:23:07 +02:00
i387.c x86/xsaves: Clear reserved bits in xsave header 2014-05-29 14:33:00 -07:00
i8237.c
i8253.c
i8259.c x86, irq, pic: Probe for legacy PIC and set legacy_pic appropriately 2014-04-14 11:49:55 -07:00
io_delay.c
ioport.c x86: get rid of pt_regs argument of iopl(2) 2013-02-03 18:16:24 -05:00
iosf_mbi.c x86/platform/intel/iosf: Add debugfs config option for IOSF 2014-09-19 13:08:43 +02:00
irq_32.c x86, threadinfo: Redo "x86: Use inline assembler to get sp" 2014-03-10 17:32:01 -07:00
irq_64.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
irq_work.c x86: Tell irq work about self IPI support 2014-09-13 18:38:29 +02:00
irq.c Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-06-12 20:03:47 -07:00
irqinit.c x86: Fix non-PC platform kernel crash on boot due to NULL dereference 2014-08-25 22:36:57 +02:00
jump_label.c x86/jump_label: expect default_nop if static_key gets enabled on boot-up 2013-10-19 19:45:35 -04:00
kdebugfs.c arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case 2012-07-26 15:07:20 +02:00
kexec-bzimage64.c kexec-bzimage64: fix sparse warnings 2014-10-14 02:18:21 +02:00
kgdb.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
ksysfs.c x86: ksysfs.c build fix 2014-01-03 14:37:13 +00:00
kvm.c Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
kvmclock.c kvm: remove redundant registration of BSP's hv_clock area 2014-02-22 15:53:32 +01:00
ldt.c Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option" 2014-05-21 10:22:59 -07:00
machine_kexec_32.c x86: Axe the lightly-used cpu_has_pae 2014-09-11 14:30:01 -07:00
machine_kexec_64.c kexec: create a new config option CONFIG_KEXEC_FILE for new syscall 2014-08-29 16:28:16 -07:00
Makefile x86: Speed up ___preempt_schedule*() by using THUNK helpers 2014-09-24 15:15:38 +02:00
mcount_64.S ftrace/x86: Add frames pointers to trampoline as necessary 2014-11-19 15:24:31 -05:00
mmconf-fam10h_64.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
module.c x86, kaslr: fix module lock ordering problem 2014-03-24 10:18:26 -07:00
mpparse.c x86, apic: Remove mps_oem_check callback 2014-07-31 08:05:42 -07:00
msr.c x86, msr: Fix CPU hotplug callback registration 2014-03-20 13:43:42 +01:00
nmi_selftest.c
nmi.c kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation 2014-04-24 10:26:38 +02:00
paravirt_patch_32.c
paravirt_patch_64.c x86_64/entry/xen: Do not invoke espfix64 on Xen 2014-07-28 15:25:40 -07:00
paravirt-spinlocks.c x86, ticketlock: Add slowpath logic 2013-08-09 07:54:00 -07:00
paravirt.c kprobes, x86: Prohibit probing on native_set_debugreg()/load_idt() 2014-04-24 10:02:58 +02:00
pci-calgary_64.c x86, calgary: Use 8M TCE table size by default 2014-04-10 19:51:32 -07:00
pci-dma.c arch/x86/kernel/pci-dma.c: fix dma_generic_alloc_coherent() when CONFIG_DMA_CMA is enabled 2014-06-04 16:53:57 -07:00
pci-iommu_table.c
pci-nommu.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
pci-swiotlb.c x86: enable DMA CMA with swiotlb 2014-06-04 16:53:57 -07:00
pcspeaker.c
perf_regs.c perf: Fix off by one test in perf_reg_value() 2012-09-19 17:08:40 +02:00
pmc_atom.c x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=n 2014-09-19 13:02:21 +02:00
probe_roms.c x86/pci/probe_roms: Add missing __iomem annotation to pci_map_biosrom() 2012-09-05 10:52:25 +02:00
process_32.c x86: copy_thread: Don't nullify ->ptrace_bps twice 2014-09-02 14:51:17 -07:00
process_64.c x86: copy_thread: Don't nullify ->ptrace_bps twice 2014-09-02 14:51:17 -07:00
process.c x86, fpu: Shift "fpu_counter = 0" from copy_thread() to arch_dup_task_struct() 2014-09-02 14:51:16 -07:00
ptrace.c Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
pvclock.c hung_task: add method to reset detector 2013-11-06 09:49:02 +02:00
quirks.c x86: HPET force enable for e6xx based systems 2014-09-15 17:53:35 -07:00
reboot_fixups_32.c
reboot.c x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag 2014-07-18 21:23:52 +01:00
relocate_kernel_32.S x86, asm, cleanup: Replace open-coded control register values with symbolic 2013-06-25 16:26:06 -07:00
relocate_kernel_64.S x86, reloc: Use xorl instead of xorq in relocate_kernel_64.S 2013-06-20 21:30:04 -07:00
resource.c x86: don't exclude low BIOS area when allocating address space for non-PCI cards 2014-07-16 12:29:36 -06:00
rtc.c Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-12 11:12:22 +09:00
setup_percpu.c
setup.c x86: Quark: Comment setup_arch() to document TLB/PGE bug 2014-10-08 10:07:46 +02:00
signal.c x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal() 2014-09-02 14:51:14 -07:00
smp.c asmlinkage, x86: Add explicit __visible to arch/x86/* 2014-05-05 16:07:44 -07:00
smpboot.c Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 18:20:39 +02:00
stacktrace.c
step.c ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL 2013-01-22 10:08:00 -08:00
sys_x86_64.c x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member 2013-08-22 10:19:35 -07:00
syscall_32.c x86, asmlinkage: Make syscall tables visible 2013-08-06 14:20:18 -07:00
syscall_64.c x86, asmlinkage: Make syscall tables visible 2013-08-06 14:20:18 -07:00
sysfb_efi.c x86: sysfb: move EFI quirks from efifb to sysfb 2013-08-02 16:17:47 -07:00
sysfb_simplefb.c x86/simplefb: Mark framebuffer mem-resources as IORESOURCE_BUSY to avoid bootup warning 2013-10-03 07:51:11 +02:00
sysfb.c x86: sysfb: move EFI quirks from efifb to sysfb 2013-08-02 16:17:47 -07:00
tboot.c x86 / tboot / ACPI: Fail extended mode reduced hardware sleep 2013-07-31 14:25:51 +02:00
tce_64.c
test_nx.c
test_rodata.c
time.c x86: Fix non-PC platform kernel crash on boot due to NULL dereference 2014-08-25 22:36:57 +02:00
tls.c make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect 2013-03-03 22:58:33 -05:00
tls.h
topology.c hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock() 2013-09-30 19:55:51 +02:00
trace_clock.c tracing,x86: Add a TSC trace_clock 2012-11-13 15:48:27 -05:00
tracepoint.c x86: Make sure IDT is page aligned 2013-07-16 15:14:48 -07:00
traps.c x86/kprobes: Fix build errors and blacklist context_track_user 2014-06-14 09:07:44 +02:00
tsc_msr.c x86: tsc: Add missing Baytrail frequency to the table 2014-02-19 17:12:24 +01:00
tsc_sync.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
tsc.c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-05 17:46:42 -07:00
uprobes.c uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates 2014-06-05 16:21:57 +02:00
verify_cpu.S
vm86_32.c x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...) 2013-05-02 20:36:32 -04:00
vmlinux.lds.S x86, vdso: Zero-pad the VVAR page 2014-03-18 12:52:44 -07:00
vsmp_64.c x86/apic/vsmp: Make is_vsmp_box() static 2014-08-01 15:09:45 -07:00
vsyscall_64.c seccomp,x86,arm,mips,s390: Remove nr parameter from secure_computing 2014-09-03 14:58:17 -07:00
vsyscall_emu_64.S
vsyscall_gtod.c timekeeping: Create struct tk_read_base and use it in struct timekeeper 2014-07-23 15:01:53 -07:00
vsyscall_trace.h
x86_init.c PCI: Drop "irq" param from *_restore_msi_irqs() 2013-12-13 08:44:30 -07:00
x8664_ksyms_64.c sched, x86: Optimize the preempt_schedule() call 2013-09-25 14:23:07 +02:00
xsave.c x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable() 2014-09-02 14:51:15 -07:00