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alistair23-linux/arch/arm64/kernel
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Mark Rutland 3085e1645e arm64: remove sigreturn wrappers 
The arm64 sigreturn* syscall handlers are non-standard. Rather than
taking a number of user parameters in registers as per the AAPCS,
they expect the pt_regs as their sole argument.

To make this work, we override the syscall definitions to invoke
wrappers written in assembly, which mov the SP into x0, and branch to
their respective C functions.

On other architectures (such as x86), the sigreturn* functions take no
argument and instead use current_pt_regs() to acquire the user
registers. This requires less boilerplate code, and allows for other
features such as interposing C code in this path.

This patch takes the same approach for arm64.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tentatively-reviewed-by: Dave Martin <dave.martin@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-12 14:40:39 +01:00
..
probes
vdso
.gitignore
acpi.c More ACPI updates for v4.16-rc1 2018-02-09 09:44:25 -08:00
acpi_numa.c arm64: numa: rework ACPI NUMA initialization 2018-07-09 18:21:40 +01:00
acpi_parking_protocol.c
alternative.c arm64: Avoid flush_icache_range() in alternatives patching code 2018-06-27 18:21:53 +01:00
arm64ksyms.c arm64: export tishift functions to modules 2018-05-21 19:00:48 +01:00
armv8_deprecated.c arm64: kill config_sctlr_el1() 2018-07-12 14:40:38 +01:00
asm-offsets.c arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests 2018-05-31 18:00:57 +01:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives 2018-02-06 22:53:27 +00:00
cpu_errata.c arm64: kill config_sctlr_el1() 2018-07-12 14:40:38 +01:00
cpu_ops.c
cpufeature.c arm64: use PSR_AA32 definitions 2018-07-05 17:24:14 +01:00
cpuidle.c
cpuinfo.c arm64: Expose Arm v8.4 features 2018-03-19 18:14:27 +00:00
crash_dump.c
debug-monitors.c arm64: Use arm64_force_sig_info instead of force_sig_info 2018-03-06 18:52:32 +00:00
efi-entry.S
efi-header.S
efi-rt-wrapper.S efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
efi.c efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S
entry.S arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
entry32.S arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
fpsimd.c arm64: move sve_user_{enable,disable} to <asm/fpsimd.h> 2018-07-12 14:40:39 +01:00
ftrace.c
head.S arm64/kvm: Prohibit guest LOR accesses 2018-02-26 10:48:01 +01:00
hibernate-asm.S
hibernate.c arm64: ssbd: Restore mitigation status on CPU resume 2018-05-31 17:35:19 +01:00
hw_breakpoint.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
hyp-stub.S
image.h arm64/efi: Make strrchr() available to the EFI namespace 2018-03-05 13:45:38 -06:00
insn.c arm64: insn: Don't fallback on nosync path for general insn patching 2018-07-05 17:24:48 +01:00
io.c
irq.c
jump_label.c
kaslr.c arm64/kernel: kaslr: reduce module randomization range to 4 GB 2018-03-08 13:49:26 +00:00
kgdb.c arm64/debug: Fix registers on sleeping tasks 2018-03-06 18:52:34 +00:00
kuser32.S
machine_kexec.c arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
Makefile arm64: ssbd: Add prctl interface for per-thread mitigation 2018-05-31 18:00:52 +01:00
module-plts.c arm64/kernel: rename module_emit_adrp_veneer->module_emit_veneer_for_adrp 2018-04-24 19:07:35 +01:00
module.c arm64: Avoid flush_icache_range() in alternatives patching code 2018-06-27 18:21:53 +01:00
module.lds
paravirt.c
pci.c
perf_callchain.c
perf_event.c arm_pmu: simplify arm_pmu::handle_irq 2018-05-21 18:07:05 +01:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
process.c arm64: use PSR_AA32 definitions 2018-07-05 17:24:14 +01:00
psci.c
ptrace.c arm64: rseq: Implement backend rseq calls and select HAVE_RSEQ 2018-07-11 13:29:34 +01:00
reloc_test_core.c arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
reloc_test_syms.S arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
relocate_kernel.S
return_address.c
sdei.c
setup.c
signal.c arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
signal32.c arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
sleep.S arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives 2018-02-06 22:53:27 +00:00
smccc-call.S
smp.c arm64: numa: rework ACPI NUMA initialization 2018-07-09 18:21:40 +01:00
smp_spin_table.c
ssbd.c arm64: ssbd: Add prctl interface for per-thread mitigation 2018-05-31 18:00:52 +01:00
stacktrace.c Revert "arm64: fix infinite stacktrace" 2018-07-12 11:37:40 +01:00
suspend.c arm64: ssbd: Restore mitigation status on CPU resume 2018-05-31 17:35:19 +01:00
sys.c arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
sys32.c arm64: remove sigreturn wrappers 2018-07-12 14:40:39 +01:00
sys_compat.c signal: Ensure every siginfo we send has all bits initialized 2018-04-25 10:40:51 -05:00
time.c arm64: fix unwind_frame() for filtered out fn for function graph tracing 2018-02-23 13:46:38 +00:00
topology.c arm64: topology: re-introduce numa mask check for scheduler MC selection 2018-07-06 13:18:18 +01:00
trace-events-emulation.h
traps.c arm64: kill config_sctlr_el1() 2018-07-12 14:40:38 +01:00
vdso.c
vmlinux.lds.S arm64: remove no-op macro VMLINUX_SYMBOL() 2018-05-15 18:14:24 +01:00