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bd7d38dbdf
linux/arch/arm64/kernel
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AKASHI Takahiro bd7d38dbdf arm64: ftrace: Add dynamic ftrace support 
This patch allows "dynamic ftrace" if CONFIG_DYNAMIC_FTRACE is enabled.
Here we can turn on and off tracing dynamically per-function base.

On arm64, this is done by patching single branch instruction to _mcount()
inserted by gcc -pg option. The branch is replaced to NOP initially at
kernel start up, and later on, NOP to branch to ftrace_caller() when
enabled or branch to NOP when disabled.
Please note that ftrace_caller() is a counterpart of _mcount() in case of
'static' ftrace.

More details on architecture specific requirements are described in
Documentation/trace/ftrace-design.txt.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-05-29 09:08:33 +01:00
..
vdso arm64: vdso: fix coarse clock handling 2014-02-05 11:55:30 +00:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
arm64ksyms.c arm64: Add ftrace support 2014-05-29 09:08:08 +01:00
asm-offsets.c arm64: kernel: cpu_{suspend/resume} implementation 2013-12-16 17:17:31 +00:00
cpu_ops.c arm64: Slightly improve the warning on CPU0 enable-method 2013-10-31 16:37:26 +00:00
cputable.c arm64: add CPU_HOTPLUG infrastructure 2013-10-25 11:33:21 +01:00
debug-monitors.c arm64: debug: remove noisy, pointless warning 2014-04-25 16:46:50 +01:00
early_printk.c arm64: fixmap: fix missing sub-page offset for earlyprintk 2014-05-03 22:20:31 +01:00
entry-fpsimd.S arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
entry-ftrace.S arm64: ftrace: Add dynamic ftrace support 2014-05-29 09:08:33 +01:00
entry.S 2014-05-15 for-3.16 pull request 2014-05-16 10:05:11 +01:00
fpsimd.c arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
ftrace.c arm64: ftrace: Add dynamic ftrace support 2014-05-29 09:08:33 +01:00
head.S arm64: head: fix cache flushing and barriers in set_cpu_boot_mode_flag 2014-05-09 17:04:12 +01:00
hw_breakpoint.c arm64: is_compat_task is defined both in asm/compat.h and linux/compat.h 2014-05-12 16:43:29 +01:00
hyp-stub.S arm64: add hypervisor stub 2012-12-05 11:26:49 +00:00
insn.c arm64: introduce aarch64_insn_gen_{nop|branch_imm}() helper functions 2014-01-08 15:21:29 +00:00
io.c arm64: Device specific operations 2012-09-17 13:42:04 +01:00
irq.c arm64: add CPU_HOTPLUG infrastructure 2013-10-25 11:33:21 +01:00
jump_label.c arm64, jump label: optimize jump label implementation 2014-01-08 15:23:53 +00:00
kgdb.c arm64: KGDB: Add step debugging support 2014-02-26 11:16:25 +00:00
kuser32.S arm64: atomics: fix use of acquire + release for full barrier semantics 2014-02-07 16:45:43 +00:00
Makefile arm64: Add ftrace support 2014-05-29 09:08:08 +01:00
module.c arm64: move encode_insn_immediate() from module.c to insn.c 2014-01-08 15:21:29 +00:00
perf_event.c arm64: fix !CONFIG_COMPAT build failures 2014-04-06 23:25:04 +01:00
perf_regs.c arm64: fix !CONFIG_COMPAT build failures 2014-04-06 23:25:04 +01:00
process.c arm64: Fix deadlock scenario with smp_send_stop() 2014-05-16 18:03:33 +01:00
psci.c arm64: remove return value form psci_init() 2014-02-28 14:14:53 +00:00
ptrace.c 2014-05-15 for-3.16 pull request 2014-05-16 10:05:11 +01:00
setup.c arm64: Clean up the default pgprot setting 2014-05-09 15:53:37 +01:00
signal32.c 2014-05-15 for-3.16 pull request 2014-05-16 10:05:11 +01:00
signal.c 2014-05-15 for-3.16 pull request 2014-05-16 10:05:11 +01:00
sleep.S arm64: kernel: cpu_{suspend/resume} implementation 2013-12-16 17:17:31 +00:00
smp_spin_table.c arm64: Remove boot thread synchronisation for spin-table release method 2014-05-09 15:47:46 +01:00
smp.c arm64: Support arch_irq_work_raise() via self IPIs 2014-05-16 17:42:21 +01:00
stacktrace.c arm64: Add 'notrace' attribute to unwind_frame() for ftrace 2014-05-29 09:04:31 +01:00
suspend.c arm64: kernel: fix per-cpu offset restore on resume 2014-01-24 14:27:40 +00:00
sys32.S arm64: compat: correct register concatenation for syscall wrappers 2013-10-25 15:59:36 +01:00
sys_compat.c compat: generic compat_sys_sched_rr_get_interval() implementation 2012-12-17 17:15:18 -08:00
sys.c arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
time.c arm64: init: Move of_clk_init to time_init 2014-04-25 18:15:56 +01:00
topology.c arm64: topology: Add support for topology DT bindings 2014-05-16 17:12:41 +01:00
traps.c arm64: Provide read/write fault information in compat signal handlers 2014-05-09 15:47:47 +01:00
vdso.c arm64: vdso: clean up vdso_pagelist initialization 2014-02-26 11:16:30 +00:00
vmlinux.lds.S arm64: Fix linker script entry point 2014-05-23 15:32:03 +01:00