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OpenCloudOS-Kernel/arch/arm64/kernel
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Keno Fischer 1cf6022bd9 arm64: Fix PTRACE_SYSEMU semantics 
Quoth the man page:
```
       If the tracee was restarted by PTRACE_SYSCALL or PTRACE_SYSEMU, the
       tracee enters syscall-enter-stop just prior to entering any system
       call (which will not be executed if the restart was using
       PTRACE_SYSEMU, regardless of any change made to registers at this
       point or how the tracee is restarted after this stop).
```

The parenthetical comment is currently true on x86 and powerpc,
but not currently true on arm64. arm64 re-checks the _TIF_SYSCALL_EMU
flag after the syscall entry ptrace stop. However, at this point,
it reflects which method was used to re-start the syscall
at the entry stop, rather than the method that was used to reach it.
Fix that by recording the original flag before performing the ptrace
stop, bringing the behavior in line with documentation and x86/powerpc.

Fixes: f086f67485 ("arm64: ptrace: add support for syscall emulation")
Cc: <stable@vger.kernel.org> # 5.3.x-
Signed-off-by: Keno Fischer <keno@juliacomputing.com>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Bin Lu <Bin.Lu@arm.com>
[catalin.marinas@arm.com: moved 'flags' bit masking]
[catalin.marinas@arm.com: changed 'flags' type to unsigned long]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2020-05-20 12:02:42 +01:00
..
probes arm64: remove __exception annotations 2019-10-28 11:22:38 +00:00
vdso arm64: vdso: Add -fasynchronous-unwind-tables to cflags 2020-04-30 18:35:32 +01:00
vdso32 SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile arm64: efi: add efi-entry.o to targets instead of extra-$(CONFIG_EFI) 2020-03-09 18:13:25 +00:00
acpi.c arm64: acpi: fix DAIF manipulation with pNMI 2020-01-22 14:41:22 +00:00
acpi_numa.c acpi: Create subtable parsing infrastructure 2019-04-04 18:41:12 +02:00
acpi_parking_protocol.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
alternative.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
armv8_deprecated.c arm64: armv8_deprecated: Fix undef_hook mask for thumb setend 2020-04-08 18:19:20 +01:00
asm-offsets.c arm64: initialize and switch ptrauth kernel keys 2020-03-18 09:50:20 +00:00
cacheinfo.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
cpu-reset.S arm64: use mov_q instead of literal ldr 2020-03-24 11:48:24 +00:00
cpu-reset.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpu_errata.c arm64: Mark call_smc_arch_workaround_1 as __maybe_unused 2020-03-11 12:01:59 +00:00
cpu_ops.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpufeature.c Merge branch 'for-next/kernel-ptrauth' into for-next/core 2020-03-25 11:11:08 +00:00
cpuidle.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpuinfo.c Merge branch 'for-next/rng' into for-next/core 2020-01-22 11:38:53 +00:00
crash_core.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
crash_dump.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
debug-monitors.c arm64: Remove unneeded rcu_read_lock from debug handlers 2019-08-01 15:00:27 +01:00
efi-entry.S efi/arm64: Clean EFI stub exit code from cache instead of avoiding it 2020-02-29 10:16:57 +01:00
efi-header.S efi/libstub: Introduce symbolic constants for the stub major/minor version 2020-02-23 21:59:42 +01:00
efi-rt-wrapper.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
efi.c mm/pgtable: drop pgtable_t variable from pte_fn_t functions 2019-07-12 11:05:46 -07:00
entry-common.c arm64: entry: unmask IRQ in el0_sp() 2020-03-11 14:34:28 +00:00
entry-fpsimd.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
entry-ftrace.S arm64: entry-ftrace.S: Fix missing argument for CONFIG_FUNCTION_GRAPH_TRACER=y 2020-03-11 11:06:48 +00:00
entry.S Merge branch 'for-next/kernel-ptrauth' into for-next/core 2020-03-25 11:11:08 +00:00
fpsimd.c arm64: nofpsmid: Handle TIF_FOREIGN_FPSTATE flag cleanly 2020-01-14 17:11:53 +00:00
ftrace.c arm64: ftrace: minimize ifdeffery 2019-11-06 14:17:36 +00:00
head.S Merge branch 'for-next/kernel-ptrauth' into for-next/core 2020-03-25 11:11:08 +00:00
hibernate-asm.S arm64: remove gratuitious/stray .ltorg stanzas 2020-03-04 15:47:47 +00:00
hibernate.c arm64: hibernate: Use bringup_hibernate_cpu() 2020-03-25 12:59:34 +01:00
hw_breakpoint.c Printk changes for 5.5 2019-11-25 19:40:40 -08:00
hyp-stub.S arm64: use mov_q instead of literal ldr 2020-03-24 11:48:24 +00:00
image-vars.h efi/arm64: Clean EFI stub exit code from cache instead of avoiding it 2020-02-29 10:16:57 +01:00
image.h arm64/efi: Move variable assignments after SECTIONS 2019-08-14 17:18:15 +01:00
insn.c arm64: insn: consistently handle exit text 2019-12-04 11:32:20 +00:00
io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
irq.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
jump_label.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kaslr.c arm64: Fix CONFIG_ARCH_RANDOM=n build 2020-02-11 09:47:01 +00:00
kexec_image.c arm64: kexec_file: add crash dump support 2020-01-08 17:05:23 +00:00
kgdb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kuser32.S docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
machine_kexec.c arm64: fix the flush_icache_range arguments in machine_kexec 2020-05-11 12:02:14 +01:00
machine_kexec_file.c arm64: kexec_file: Fixed code style. 2020-03-17 18:23:20 +00:00
module-plts.c arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
module.c arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
paravirt.c arm64: Retrieve stolen time as paravirtualized guest 2019-10-21 19:20:31 +01:00
pci.c pci-v5.3-changes 2019-07-15 20:44:49 -07:00
perf_callchain.c arm64: stacktrace: Factor out backtrace initialisation 2019-07-22 11:44:08 +01:00
perf_event.c arm64: perf: Add support for ARMv8.5-PMU 64-bit counters 2020-03-17 22:50:30 +00:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
pointer_auth.c arm64: install user ptrauth keys at kernel exit time 2020-03-18 09:50:19 +00:00
process.c arm64 updates for 5.7: 2020-03-31 10:05:01 -07:00
psci.c arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill() 2019-10-25 16:29:11 +01:00
ptrace.c arm64: Fix PTRACE_SYSEMU semantics 2020-05-20 12:02:42 +01:00
reloc_test_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
reloc_test_syms.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
relocate_kernel.S arm64: use mov_q instead of literal ldr 2020-03-24 11:48:24 +00:00
return_address.c arm64: unwind: Prohibit probing on return_address() 2019-08-01 15:00:26 +01:00
sdei.c firmware: arm_sdei: use common SMCCC_CONDUIT_* 2019-10-14 10:55:14 +01:00
setup.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
signal.c arm64: signal: nofpsimd: Handle fp/simd context for signal frames 2020-01-14 17:11:46 +00:00
signal32.c arm64: signal: nofpsimd: Handle fp/simd context for signal frames 2020-01-14 17:11:46 +00:00
sigreturn32.S arm64: compat: Split kuser32 2019-04-23 18:01:57 +01:00
sleep.S arm64: ptrauth: Add bootup/runtime flags for __cpu_setup 2020-03-18 09:50:19 +00:00
smccc-call.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
smp.c arm64 updates for 5.7: 2020-03-31 10:05:01 -07:00
smp_spin_table.c arm64: prefer __section from compiler_attributes.h 2019-08-13 18:32:15 +01:00
ssbd.c Return ENODEV when the selected speculation misfeature is unsupported 2020-01-08 17:27:41 +00:00
stacktrace.c arm64: unwind: strip PAC from kernel addresses 2020-03-18 09:50:20 +00:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
sys32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452 2019-06-19 17:09:08 +02:00
sys_compat.c arm64: Silence clang warning on mismatched value/register sizes 2019-10-28 09:13:21 +00:00
syscall.c arm64: entry: cleanup el0 svc handler naming 2020-01-17 13:22:14 +00:00
time.c arm64: time: Replace <linux/clk-provider.h> by <linux/of_clk.h> 2020-02-12 17:26:38 +00:00
topology.c arm64: use activity monitors for frequency invariance 2020-03-06 16:02:50 +00:00
trace-events-emulation.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
traps.c sched/rt, arm64: Use CONFIG_PREEMPTION 2019-12-08 14:37:32 +01:00
vdso.c arm64: vdso: don't free unallocated pages 2020-04-15 11:13:16 +01:00
vmlinux.lds.S arm64 updates for 5.5: 2019-12-06 14:18:01 -08:00