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Lin Yongting 9c98666163 ARM: 8049/1: ftrace/add save_stack_trace_regs() implementation 
When configure kprobe events of ftrace with "stacktrace" option enabled
in arm, there is no stacktrace was recorded after the kprobe event was
triggered. The root cause is no save_stack_trace_regs() function implemented.

Implement the save_stack_trace_regs() function in arm, then ftrace will
call this architecture-related function to record the stacktrace into
ring buffer.

After this fix, stacktrace can be recorded, for example:

 # mount -t debugfs nodev /sys/kernel/debug
 # echo "p:netrx net_rx_action" >> /sys/kernel/debug/tracing/kprobe_events
 # echo 1 > /sys/kernel/debug/tracing/events/kprobes/netrx/enable
 # echo 1 > /sys/kernel/debug/tracing/options/stacktrace
 # echo 1 > /sys/kernel/debug/tracing/tracing_on
 # ping 127.0.0.1 -c 1
 # echo 0 > /sys/kernel/debug/tracing/tracing_on

 # cat /sys/kernel/debug/tracing/trace
 # tracer: nop
 #
 # entries-in-buffer/entries-written: 12/12   #P:1
 #
 #                              _-----=> irqs-off
 #                             / _----=> need-resched
 #                            | / _---=> hardirq/softirq
 #                            || / _--=> preempt-depth
 #                            ||| /     delay
 #           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
 #              | |       |   ||||       |         |
             <------ missing some entries ---------------->
             ping-1200  [000] dNs1   667.603250: netrx: (net_rx_action+0x0/0x1f8)
             ping-1200  [000] dNs1   667.604738: <stack trace>
  => net_rx_action
  => do_softirq
  => local_bh_enable
  => ip_finish_output
  => ip_output
  => ip_local_out
  => ip_send_skb
  => ip_push_pending_frames
  => raw_sendmsg
  => inet_sendmsg
  => sock_sendmsg
  => SyS_sendto
  => ret_fast_syscall

Signed-off-by: Lin Yongting <linyongting@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-05-30 01:12:32 +01:00
..
.gitignore
…
arch_timer.c
arch_timer: Move to generic sched_clock framework
2013-10-09 16:54:10 -07:00
armksyms.c
ARM: Better virt_to_page() handling
2014-04-03 22:46:34 +01:00
arthur.c
…
asm-offsets.c
ARM: KVM: introduce per-vcpu HYP Configuration Register
2014-03-03 01:15:23 +00:00
atags_compat.c
ARM: 7505/1: split out ATAGS parsing
2012-09-03 22:55:56 +01:00
atags_parse.c
ARM: constify machine_desc structure uses
2013-07-26 14:55:59 +01:00
atags_proc.c
procfs: new helper - PDE_DATA(inode)
2013-04-09 14:13:32 -04:00
atags.h
ARM: constify machine_desc structure uses
2013-07-26 14:55:59 +01:00
bios32.c
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2014-04-05 13:20:43 -07:00
calls.S
sched: Add new scheduler syscalls to support an extended scheduling parameters ABI
2014-01-13 13:41:04 +01:00
cpuidle.c
…
crash_dump.c
ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr
2014-04-07 12:10:00 +01:00
debug.S
ARM: compile fix for DEBUG_LL=y && MMU=n
2013-01-16 14:30:06 -08:00
devtree.c
ARM: Introduce CPU_METHOD_OF_DECLARE() for cpu hotplug/smp
2014-02-11 15:00:37 -06:00
dma-isa.c
…
dma.c
…
early_printk.c
early_printk: consolidate random copies of identical code
2013-04-29 18:28:13 -07:00
elf.c
Disintegrate asm/system.h for ARM
2012-03-28 18:30:01 +01:00
entry-armv.S
ARM: 8062/1: Modify ldrt fixup handler to re-execute the userspace instruction
2014-05-30 01:12:28 +01:00
entry-common.S
ARM: asm: Add ARM_BE8() assembly helper
2013-10-19 20:46:33 +01:00
entry-header.S
ARM: 8017/1: Move asm macro get_thread_info to asm/assembler.h
2014-04-09 13:08:07 +01:00
entry-v7m.S
ARM: 7890/1: v7-M: drop using mach/entry-macro.S
2013-12-29 12:32:32 +00:00
etm.c
ARM: 7905/1: etm: Remove unnecessary amba_set_drvdata()
2013-12-29 12:32:34 +00:00
fiq.c
ARM: 7819/1: fiq: Cast the first argument of flush_icache_range()
2013-08-20 00:11:50 +01:00
fiqasm.S
…
ftrace.c
ARM: 8022/1: ftrace: work with CONFIG_DEBUG_SET_MODULE_RONX
2014-04-23 01:24:31 +01:00
head-common.S
ARM: 7980/1: kernel: improve error message when LPAE config doesn't match CPU
2014-02-21 11:56:32 +00:00
head-nommu.S
ARM: fix asm/memory.h build error
2013-12-13 20:25:30 +00:00
head.S
ARM: 8028/1: move __fixup_smp out of init section
2014-05-25 23:46:51 +01:00
hibernate.c
ARM: 8011/1: ARM hibernation / suspend-to-disk
2014-04-23 01:24:14 +01:00
hw_breakpoint.c
CPU hotplug notifiers registration fixes for 3.15-rc1
2014-04-07 14:55:46 -07:00
hyp-stub.S
ARM: 7786/1: hyp: fix macro parameterisation
2013-07-22 14:30:34 +01:00
insn.c
ARM: fix missing bug.h include in arch/arm/kernel/insn.c
2012-03-30 11:51:46 +01:00
insn.h
…
io.c
ARM: 7930/1: Introduce atomic MMIO modify
2014-01-28 14:06:25 +00:00
irq.c
ARM: irq: Call irqchip_init if no init_irq function is specified
2013-04-02 11:05:40 -07:00
isa.c
…
iwmmxt.S
ARM: 8036/1: Enable IRQs before attempting to read user space in __und_usr
2014-04-25 12:06:38 +01:00
jump_label.c
…
kgdb.c
…
kprobes-arm.c
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
kprobes-common.c
ARM: probes: fix instruction fetch order with <asm/opcodes.h>
2014-04-01 16:45:19 +03:00
kprobes-test-arm.c
ARM: kprobes-test: use <asm/opcodes.h> for ARM instruction building
2014-04-01 16:48:24 +03:00
kprobes-test-thumb.c
ARM: kprobes-test: use <asm/opcodes.h> for Thumb instruction building
2014-04-01 16:48:26 +03:00
kprobes-test.c
ARM: kprobes-test: Workaround GAS .align bug
2014-04-01 16:48:27 +03:00
kprobes-test.h
ARM: kprobes-test: Workaround GAS .align bug
2014-04-01 16:48:27 +03:00
kprobes-thumb.c
ARM: probes: fix instruction fetch order with <asm/opcodes.h>
2014-04-01 16:45:19 +03:00
kprobes.c
ARM: probes: fix instruction fetch order with <asm/opcodes.h>
2014-04-01 16:45:19 +03:00
kprobes.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
machine_kexec.c
ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel
2013-11-30 22:21:02 +00:00
Makefile
ARM: 8011/1: ARM hibernation / suspend-to-disk
2014-04-23 01:24:14 +01:00
module.c
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
2013-11-14 08:51:29 +09:00
opcodes.c
…
patch.c
…
patch.h
…
perf_event_cpu.c
ARM: 8054/1: perf: add support for the Cortex-A17 PMU
2014-05-25 23:49:43 +01:00
perf_event_v6.c
ARM: perf: don't pretend to support counting of L1I writes
2013-01-16 12:01:59 +00:00
perf_event_v7.c
ARM: 8054/1: perf: add support for the Cortex-A17 PMU
2014-05-25 23:49:43 +01:00
perf_event_xscale.c
ARM: perf: don't pretend to support counting of L1I writes
2013-01-16 12:01:59 +00:00
perf_event.c
ARM: perf: hook up perf_sample_event_took around pmu irq handling
2014-02-21 11:11:21 +00:00
perf_regs.c
ARM: perf: add support for perf registers API
2013-09-30 16:41:50 +01:00
pj4-cp0.c
ARM: 8016/1: Check cpu id in pj4_cp0_init.
2014-04-08 17:55:28 +01:00
probes-arm.c
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
probes-arm.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
probes-thumb.c
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
probes-thumb.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
probes.c
ARM: probes: fix instruction fetch order with <asm/opcodes.h>
2014-04-01 16:45:19 +03:00
probes.h
ARM: Make arch_specific_insn a define for new arch_probes_insn structure
2014-03-18 16:39:40 -04:00
process.c
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2014-04-11 11:56:40 -07:00
psci_smp.c
ARM: PSCI: remove unnecessary include of arm-gic.h
2013-10-01 16:34:10 -05:00
psci.c
arm: introduce psci_smp_ops
2013-05-21 14:24:11 +00:00
ptrace.c
ptrace/arm: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"
2013-07-09 10:33:25 -07:00
relocate_kernel.S
ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel
2013-11-30 22:21:02 +00:00
return_address.c
ARM: 7676/1: fix a wrong value returned from CALLER_ADDRn
2013-03-19 11:43:46 +00:00
setup.c
Merge branches 'amba', 'fixes', 'misc', 'mmci', 'unstable/omap-dma' and 'unstable/sa11x0' into for-next
2014-04-04 00:33:32 +01:00
signal.c
ARM: add uprobes support
2014-03-18 16:39:40 -04:00
sigreturn_codes.S
ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S
2013-11-30 22:21:00 +00:00
sleep.S
ARM: 8053/1: kernel: sleep: restore HYP mode configuration in cpu_resume
2014-05-25 23:49:27 +01:00
smp_scu.c
ARM: smp_scu: data endian fixes
2013-10-19 20:46:33 +01:00
smp_tlb.c
ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECO
2013-10-29 11:06:13 +00:00
smp_twd.c
cpufreq: remove unused notifier: CPUFREQ_{SUSPENDCHANGE|RESUMECHANGE}
2014-03-19 14:10:24 +01:00
smp.c
cpufreq: remove unused notifier: CPUFREQ_{SUSPENDCHANGE|RESUMECHANGE}
2014-03-19 14:10:24 +01:00
stacktrace.c
ARM: 8049/1: ftrace/add save_stack_trace_regs() implementation
2014-05-30 01:12:32 +01:00
suspend.c
ARM: suspend: use hash of cpu_logical_map value to index into save array
2013-07-30 09:00:43 -04:00
swp_emulate.c
arm: single_open() leaks
2013-05-05 00:07:22 -04:00
sys_arm.c
arm: switch to generic fork/vfork/clone
2012-11-28 22:13:54 -05:00
sys_oabi-compat.c
locks: add new fcntl cmd values for handling file private locks
2014-03-31 08:24:43 -04:00
tcm.c
ARM: add permission annotations to MT_MEMORY* mapping types
2013-12-11 09:53:14 +00:00
thumbee.c
ARM: 7385/1: ThumbEE: Use cpuid macros to read ID_PFR0 for ThumbEE
2012-04-25 19:49:26 +01:00
time.c
ARM: call of_clk_init from default time_init handler
2013-09-29 21:09:15 +02:00
topology.c
ARM: 8008/1: topology: Coding style fixes
2014-04-14 23:27:19 +01:00
traps.c
Dump the registers on undefined instruction userspace faults
2014-04-11 14:48:39 +01:00
unwind.c
ARM: 7987/1: ARM : unwinder : Prevent data abort due to stack overflow
2014-02-25 11:48:24 +00:00
uprobes-arm.c
ARM: add uprobes support
2014-03-18 16:39:40 -04:00
uprobes.c
ARM: 8043/1: uprobes need icache flush after xol write
2014-05-25 23:48:45 +01:00
uprobes.h
ARM: add uprobes support
2014-03-18 16:39:40 -04:00
v7m.c
ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines
2013-09-02 13:49:29 +01:00
vmlinux.lds.S
ARM: use linker magic for vectors and vector stubs
2013-07-31 21:34:24 +01:00
xscale-cp0.c
…