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Olof Johansson e306dfd06f ARM64: unwind: Fix PC calculation 
The frame PC value in the unwind code used to just take the saved LR
value and use that.  That's incorrect as a stack trace, since it shows
the return path stack, not the call path stack.

In particular, it shows faulty information in case the bl is done as
the very last instruction of one label, since the return point will be
in the next label. That can easily be seen with tail calls to panic(),
which is marked __noreturn and thus doesn't have anything useful after it.

Easiest here is to just correct the unwind code and do a -4, to get the
actual call site for the backtrace instead of the return site.

Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2014-02-17 09:16:33 +00:00
..
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
Makefile arm64, jump label: optimize jump label implementation 2014-01-08 15:23:53 +00:00
arm64ksyms.c arm64: use generic strnlen_user and strncpy_from_user functions 2013-12-19 17:43:06 +00:00
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: support single-step and breakpoint handler hooks 2013-12-19 17:43:11 +00:00
early_printk.c arm64: Fix duplicate definition of early_console 2013-05-13 11:44:53 +01:00
entry-fpsimd.S arm64: move FP-SIMD save/restore code to a macro 2012-12-05 11:26:50 +00:00
entry.S arm64: fix typo in entry.S 2014-01-13 13:55:13 +00:00
fpsimd.c arm64: kernel: implement fpsimd CPU PM notifier 2013-12-16 17:17:32 +00:00
head.S arm64: Remove unused __data_loc variable 2013-12-20 12:04:48 +00:00
hw_breakpoint.c arm64: kernel: restore HW breakpoint registers in cpu_suspend 2014-01-10 17:51:35 +00:00
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
kuser32.S arm64: atomics: fix use of acquire + release for full barrier semantics 2014-02-07 16:45:43 +00:00
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: perf: add support for percpu pmu interrupt 2013-12-19 17:43:05 +00:00
process.c arm64: FIQs are unused 2014-01-30 13:51:43 +00:00
psci.c arm64: add PSCI CPU_OFF-based hotplug support 2013-10-25 11:33:21 +01:00
ptrace.c arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events 2013-12-19 17:41:25 +00:00
setup.c Merge tag 'arm64-suspend' of git://linux-arm.org/linux-2.6-lp into upstream 2013-12-19 17:57:51 +00:00
signal.c arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
signal32.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-11-13 15:34:18 +09:00
sleep.S arm64: kernel: cpu_{suspend/resume} implementation 2013-12-16 17:17:31 +00:00
smp.c arm64: FIQs are unused 2014-01-30 13:51:43 +00:00
smp_spin_table.c arm64: big-endian: write CPU holding pen address as LE 2013-10-25 15:59:42 +01:00
stacktrace.c ARM64: unwind: Fix PC calculation 2014-02-17 09:16:33 +00:00
suspend.c arm64: kernel: fix per-cpu offset restore on resume 2014-01-24 14:27:40 +00:00
sys.c arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
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
time.c arch_timer: Move to generic sched_clock framework 2013-10-09 16:54:10 -07:00
traps.c arm64: debug: consolidate software breakpoint handlers 2013-06-12 11:23:02 +01:00
vdso.c arm64: vdso: update wtm fields for CLOCK_MONOTONIC_COARSE 2014-02-05 11:55:49 +00:00
vmlinux.lds.S arm64: Remove unused __data_loc variable 2013-12-20 12:04:48 +00:00