bool "Transparent user-space probes (EXPERIMENTAL)"
depends on UPROBE_EVENT && PERF_EVENTS
default n
+ select PERCPU_RWSEM
help
Uprobes is the user-space counterpart to kprobes: they
enable instrumentation applications (such as 'perf probe')
See Documentation/unaligned-memory-access.txt for more
information on the topic of unaligned memory accesses.
+config ARCH_USE_BUILTIN_BSWAP
+ bool
+ help
+ Modern versions of GCC (since 4.4) have builtin functions
+ for handling byte-swapping. Using these, instead of the old
+ inline assembler that the architecture code provides in the
+ __arch_bswapXX() macros, allows the compiler to see what's
+ happening and offers more opportunity for optimisation. In
+ particular, the compiler will be able to combine the byteswap
+ with a nearby load or store and use load-and-swap or
+ store-and-swap instructions if the architecture has them. It
+ should almost *never* result in code which is worse than the
+ hand-coded assembler in <asm/swab.h>. But just in case it
+ does, the use of the builtins is optional.
+
+ Any architecture with load-and-swap or store-and-swap
+ instructions should set this. And it shouldn't hurt to set it
+ on architectures that don't have such instructions.
+
config HAVE_SYSCALL_WRAPPERS
bool
See Documentation/prctl/seccomp_filter.txt for details.
-config HAVE_RCU_USER_QS
+config HAVE_CONTEXT_TRACKING
bool
help
- Provide kernel entry/exit hooks necessary for userspace
- RCU extended quiescent state. Syscalls need to be wrapped inside
- rcu_user_exit()-rcu_user_enter() through the slow path using
- TIF_NOHZ flag. Exceptions handlers must be wrapped as well. Irqs
- are already protected inside rcu_irq_enter/rcu_irq_exit() but
- preemption or signal handling on irq exit still need to be protected.
+ Provide kernel/user boundaries probes necessary for subsystems
+ that need it, such as userspace RCU extended quiescent state.
+ Syscalls need to be wrapped inside user_exit()-user_enter() through
+ the slow path using TIF_NOHZ flag. Exceptions handlers must be
+ wrapped as well. Irqs are already protected inside
+ rcu_irq_enter/rcu_irq_exit() but preemption or signal handling on
+ irq exit still need to be protected.
config HAVE_VIRT_CPU_ACCOUNTING
bool
Modules only use ELF REL relocations. Modules with ELF RELA
relocations will give an error.
-config GENERIC_SIGALTSTACK
- bool
-
#
# ABI hall of shame
#
help
Architecture has the first two arguments of clone(2) swapped.
+config ODD_RT_SIGACTION
+ bool
+ help
+ Architecture has unusual rt_sigaction(2) arguments
+
+config OLD_SIGSUSPEND
+ bool
+ help
+ Architecture has old sigsuspend(2) syscall, of one-argument variety
+
+config OLD_SIGSUSPEND3
+ bool
+ help
+ Even weirder antique ABI - three-argument sigsuspend(2)
+
+config OLD_SIGACTION
+ bool
+ help
+ Architecture has old sigaction(2) syscall. Nope, not the same
+ as OLD_SIGSUSPEND | OLD_SIGSUSPEND3 - alpha has sigsuspend(2),
+ but fairly different variant of sigaction(2), thanks to OSF/1
+ compatibility...
+
+config COMPAT_OLD_SIGACTION
+ bool
+
source "kernel/gcov/Kconfig"