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e71a4e1beb
linux/arch/arm64/kernel
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Ard Biesheuvel e71a4e1beb arm64: ftrace: add support for far branches to dynamic ftrace 
Currently, dynamic ftrace support in the arm64 kernel assumes that all
core kernel code is within range of ordinary branch instructions that
occur in module code, which is usually the case, but is no longer
guaranteed now that we have support for module PLTs and address space
randomization.

Since on arm64, all patching of branch instructions involves function
calls to the same entry point [ftrace_caller()], we can emit the modules
with a trampoline that has unlimited range, and patch both the trampoline
itself and the branch instruction to redirect the call via the trampoline.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: minor clarification to smp_wmb() comment]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-06-07 11:52:02 +01:00
..
probes arm64: Call __show_regs directly 2017-05-30 11:07:41 +01:00
vdso arm64: drop non-existing vdso-offsets.h from .gitignore 2017-03-30 19:29:30 +01:00
.gitignore
acpi_numa.c arm64/numa: avoid inconsistent information to be printed 2016-09-09 14:59:08 +01:00
acpi_parking_protocol.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
acpi.c efi/bgrt: Enable ACPI BGRT handling on arm64 2017-04-05 12:27:25 +02:00
alternative.c arm64: alternatives: apply boot time fixups via the linear mapping 2017-03-23 13:54:19 +00:00
arm64ksyms.c arm64: switch to RAW_COPY_USER 2017-03-28 18:23:24 -04:00
armv8_deprecated.c arm64: armv8_deprecated: ensure extension of addr 2017-05-09 17:47:05 +01:00
asm-offsets.c arm: kernel: Add SMC structure parameter 2017-02-03 18:46:33 +00:00
cacheinfo.c arm64: cacheinfo: Remove CCSIDR-based cache information probing 2017-03-20 16:16:54 +00:00
cpu_errata.c arm64: cpu_errata: Add capability to advertise Cortex-A73 erratum 858921 2017-04-07 11:22:08 +01:00
cpu_ops.c arm64: apply __ro_after_init to some objects 2016-08-22 12:32:29 +01:00
cpu-reset.h arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
cpu-reset.S arm64: Add back cpu reset routines 2016-06-27 16:31:25 +01:00
cpufeature.c arm64: cpufeature: Fix CPU_OUT_OF_SPEC taint for uniform systems 2017-06-05 11:40:23 +01:00
cpuidle.c arm64: kernel: Update kerneldoc for cpu_suspend() rename 2017-03-10 18:06:24 +00:00
cpuinfo.c arm64: v8.3: Support for weaker release consistency 2017-03-20 16:30:22 +00:00
crash_dump.c arm64: kdump: provide /proc/vmcore file 2017-04-05 18:31:38 +01:00
debug-monitors.c arm64: cpufeature: Make ID reg accessor naming less counterintuitive 2017-04-04 16:55:41 +01:00
efi-entry.S arm64: efi-entry.S: avoid open-coded adr_l 2017-01-17 17:41:14 +00:00
efi-header.S arm64: efi: split Image code and data into separate PE/COFF sections 2017-04-04 17:50:59 +01:00
efi.c arm64: mm: replace 'block_mappings_allowed' with 'page_mappings_only' 2016-11-07 18:15:04 +00:00
entry32.S arm64: entry32: remove pointless register assignment 2015-07-10 16:47:13 +01:00
entry-fpsimd.S
entry-ftrace.S arm64: include asm/assembler.h in entry-ftrace.S 2017-02-15 11:34:25 +00:00
entry.S arm64: entry: improve data abort handling of tagged pointers 2017-05-09 17:26:59 +01:00
fpsimd.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
ftrace-mod.S arm64: ftrace: add support for far branches to dynamic ftrace 2017-06-07 11:52:02 +01:00
ftrace.c arm64: ftrace: add support for far branches to dynamic ftrace 2017-06-07 11:52:02 +01:00
head.S Merge branch 'arm64/common-sysreg' of git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux into for-next/core 2017-04-04 18:08:47 +01:00
hibernate-asm.S arm64: Introduce raw_{d,i}cache_line_size 2016-09-09 15:03:29 +01:00
hibernate.c arm64: hibernate: preserve kdump image around hibernation 2017-04-05 18:28:50 +01:00
hw_breakpoint.c arm64: hw_breakpoint: fix watchpoint matching for tagged pointers 2017-05-09 17:26:40 +01:00
hyp-stub.S arm64: hyp-stub: Zero x0 on successful stub handling 2017-04-09 07:49:35 -07:00
image.h arm64 updates for 4.7: 2016-05-16 17:17:24 -07:00
insn.c bpf, arm64: implement jiting of BPF_XADD 2017-05-02 15:04:50 -04:00
io.c arm64: optimize memcpy_{from,to}io() and memset_io() 2014-11-06 17:25:27 +00:00
irq.c arm64: remove irq_count and do_softirq_own_stack() 2015-12-21 17:26:01 +00:00
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kaslr.c arm64: kaslr: Fix up the kernel image alignment 2017-03-22 15:43:11 +00:00
kgdb.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
kuser32.S
machine_kexec.c arm64: kdump: add VMCOREINFO's for user-space tools 2017-04-05 18:29:47 +01:00
Makefile arm64: ftrace: add support for far branches to dynamic ftrace 2017-06-07 11:52:02 +01:00
module-plts.c arm64: module: split core and init PLT sections 2017-04-26 12:31:00 +01:00
module.c arm64: ftrace: add support for far branches to dynamic ftrace 2017-06-07 11:52:02 +01:00
module.lds arm64: module: split core and init PLT sections 2017-04-26 12:31:00 +01:00
paravirt.c arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
pci.c ARM64/PCI: Set root bus NUMA node on ACPI systems 2017-05-30 11:45:21 +01:00
perf_callchain.c perf core: Add a 'nr' field to perf_event_callchain_context 2016-05-16 23:11:51 -03:00
perf_event.c arm64: perf: Ignore exclude_hv when kernel is running in HYP 2017-05-15 18:30:37 +01:00
perf_regs.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
process.c arm64: Add dump_backtrace() in show_regs 2017-05-30 11:07:42 +01:00
psci.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
ptrace.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
reloc_test_core.c arm64: relocation testing module 2017-04-04 17:03:32 +01:00
reloc_test_syms.S arm64: relocation testing module 2017-04-04 17:03:32 +01:00
relocate_kernel.S arm64: Introduce raw_{d,i}cache_line_size 2016-09-09 15:03:29 +01:00
return_address.c arm64: factor out current_stack_pointer 2016-11-11 18:25:43 +00:00
setup.c arm64: check return value of of_flat_dt_get_machine_name 2017-05-30 11:07:42 +01:00
signal32.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
signal.c arm64: Add uprobe support 2016-11-07 18:15:21 +00:00
sleep.S arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx 2016-11-11 18:25:44 +00:00
smccc-call.S firmware: qcom: scm: Fix interrupted SCM calls 2017-02-03 18:46:33 +00:00
smp_spin_table.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
smp.c arm64 updates for 4.12: 2017-05-05 12:11:37 -07:00
stacktrace.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
suspend.c arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx 2016-11-11 18:25:44 +00:00
sys32.c arm64: fix implementation of mmap2 compat syscall 2015-03-19 10:43:51 +00:00
sys_compat.c sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency 2017-03-02 08:42:37 +01:00
sys.c arm64: compat: Check for AArch32 state 2016-04-20 12:22:42 +01:00
time.c arm64: ftrace: fix a stack tracer's output under function graph tracer 2015-12-21 17:26:02 +00:00
topology.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h> 2017-03-02 08:42:26 +01:00
trace-events-emulation.h arm64: Trace emulation of AArch32 legacy instructions 2014-11-20 16:35:02 +00:00
traps.c arm64: Add dump_backtrace() in show_regs 2017-05-30 11:07:42 +01:00
vdso.c arm64, vdso: Define vdso_{start,end} as array 2017-06-06 17:49:55 +01:00
vmlinux.lds.S arm64: efi: split Image code and data into separate PE/COFF sections 2017-04-04 17:50:59 +01:00