AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/arm/kernel
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Wang Nan 0dc016dbd8 ARM: kprobes: enable OPTPROBES for ARM 32 
This patch introduce kprobeopt for ARM 32.

Limitations:
 - Currently only kernel compiled with ARM ISA is supported.

 - Offset between probe point and optinsn slot must not larger than
   32MiB. Masami Hiramatsu suggests replacing 2 words, it will make
   things complex. Futher patch can make such optimization.

Kprobe opt on ARM is relatively simpler than kprobe opt on x86 because
ARM instruction is always 4 bytes aligned and 4 bytes long. This patch
replace probed instruction by a 'b', branch to trampoline code and then
calls optimized_callback(). optimized_callback() calls opt_pre_handler()
to execute kprobe handler. It also emulate/simulate replaced instruction.

When unregistering kprobe, the deferred manner of unoptimizer may leave
branch instruction before optimizer is called. Different from x86_64,
which only copy the probed insn after optprobe_template_end and
reexecute them, this patch call singlestep to emulate/simulate the insn
directly. Futher patch can optimize this behavior.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: Jon Medhurst (Tixy) <tixy@linaro.org>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
2015-01-13 16:10:17 +00:00
..
.gitignore
arch_timer.c arch_timer: Move to generic sched_clock framework 2013-10-09 16:54:10 -07:00
armksyms.c ARM: 8151/1: add missing exports for asm functions required by get_user macro 2014-09-16 16:09:30 +01:00
arthur.c
asm-offsets.c ARM: Blacklist GCC 4.8.0 to GCC 4.8.2 - PR58854 2014-10-19 09:20:52 +01:00
atags_compat.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
atags_parse.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
atags_proc.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
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 2014-12-12 15:26:48 -08:00
calls.S ARM: enable bpf syscall 2014-10-29 00:18:20 +00:00
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: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
devtree.c arm: Add devicetree fixup machine function 2014-07-29 21:26:49 -06:00
dma-isa.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
dma.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
early_printk.c early_printk: consolidate random copies of identical code 2013-04-29 18:28:13 -07:00
elf.c
entry-armv.S ARM: kprobes: disallow probing stack consuming instructions 2015-01-13 16:10:15 +00:00
entry-common.S ARM: move ftrace assembly code to separate file 2014-11-21 15:25:01 +00:00
entry-ftrace.S ARM: move ftrace assembly code to separate file 2014-11-21 15:25:01 +00:00
entry-header.S Merge branches 'fiq' (early part), 'fixes', 'l2c' (early part) and 'misc' into for-next 2014-10-02 21:47:02 +01:00
entry-v7m.S ARM: 7890/1: v7-M: drop using mach/entry-macro.S 2013-12-29 12:32:32 +00:00
fiq.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
fiqasm.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
ftrace.c ARM: kprobes: enable OPTPROBES for ARM 32 2015-01-13 16:10:17 +00:00
head-common.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
head-nommu.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
head.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
hibernate.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
hw_breakpoint.c ARM: removing support for etb/etm in "arch/arm/kernel/" 2014-11-07 15:19:33 -08:00
hyp-stub.S Here are the PPC and ARM changes for KVM, which I separated because 2014-08-07 11:35:30 -07:00
insn.c
io.c ARM: io.c: clean up EXPORT_SYMBOL()s 2014-11-21 15:25:02 +00:00
irq.c ARM: use pr_warn_ratelimited() when migrating IRQs 2014-11-21 15:24:51 +00:00
isa.c arm: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:15 -07:00
iwmmxt.S ARM: 8221/1: PJ4: allow building in Thumb-2 mode 2014-12-03 16:08:00 +00:00
jump_label.c ARM: kprobes: enable OPTPROBES for ARM 32 2015-01-13 16:10:17 +00:00
kgdb.c ARM: probes: move all probe code to dedicate directory 2015-01-09 09:36:50 +00:00
machine_kexec.c Merge branch 'devel-stable' into for-next 2014-12-05 16:30:54 +00:00
Makefile ARM: kprobes: enable OPTPROBES for ARM 32 2015-01-13 16:10:17 +00:00
module.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
opcodes.c
patch.c ARM: probes: move all probe code to dedicate directory 2015-01-09 09:36:50 +00:00
perf_callchain.c arm: perf: factor out callchain code 2014-10-30 12:16:58 +00:00
perf_event_cpu.c arm: perf: fold hotplug notifier into arm_pmu 2014-10-30 12:17:01 +00:00
perf_event_v6.c arm: perf: kill get_hw_events() 2014-10-30 12:17:00 +00:00
perf_event_v7.c arm: perf: kill get_hw_events() 2014-10-30 12:17:00 +00:00
perf_event_xscale.c arm: perf: kill get_hw_events() 2014-10-30 12:17:00 +00:00
perf_event.c ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM 2014-12-13 00:42:49 +01:00
perf_regs.c ARM: perf: add support for perf registers API 2013-09-30 16:41:50 +01:00
pj4-cp0.c ARM: 8040/1: pj4: properly detect existence of iWMMXt coprocessor 2014-04-25 12:07:34 +01:00
process.c ARM: 8241/1: Update processor_modes for hyp and monitor mode 2014-12-03 16:00:07 +00:00
psci_smp.c ARM: Check if a CPU has gone offline 2014-05-15 10:16:30 -04:00
psci.c PSCI: Add initial support for PSCIv0.2 functions 2014-05-15 10:16:00 -04:00
ptrace.c Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
relocate_kernel.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
return_address.c ARM: 8171/1: Use current_stack_pointer for return_address 2014-11-13 23:58:01 +00:00
setup.c Revert "ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo" 2015-01-04 11:39:59 -08:00
signal.c ARM: 8194/1: remove clear_thread_flag(TIF_UPROBE) 2014-11-17 20:53:55 +00:00
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: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
smp_scu.c ARM: 8122/1: smp_scu: enable SCU standby support 2014-08-02 08:51:53 +01:00
smp_tlb.c ARM: 8111/1: Enable erratum 798181 for Broadcom Brahma-B15 2014-07-24 14:40:26 +01:00
smp_twd.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
smp.c Revert "ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo" 2015-01-04 11:39:59 -08:00
stacktrace.c ARM: 8172/1: Use current_stack_pointer in save_stack_trace_tsk 2014-11-13 23:58:03 +00:00
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: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
sys_arm.c
sys_oabi-compat.c separate kernel- and userland-side msghdr 2014-11-19 16:22:59 -05:00
tcm.c ARM: add permission annotations to MT_MEMORY* mapping types 2013-12-11 09:53:14 +00:00
thumbee.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
time.c ARM: 8072/1: time: Make use of arm_get_current_stackframe 2014-07-18 12:29:14 +01:00
topology.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00
traps.c Merge branches 'fixes', 'misc', 'pm' and 'sa1100' into for-next 2014-12-05 16:30:47 +00:00
unwind.c ARM: 8176/1: Use current_stack_pointer in unwind_backtrace 2014-11-13 23:58:09 +00:00
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 generic fixmaps 2014-11-03 10:12:13 +00:00
xscale-cp0.c ARM: convert printk(KERN_* to pr_* 2014-11-21 15:24:50 +00:00