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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-07-22 23:59:56 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-07-24 14:59:03 +0200 |
| commit | 142781e108b13b2b0e8f035cfb5bfbbc8f14d887 (patch) | |
| tree | e11ce626a38bf77bd2ec08499f2199534e2a9a15 /kernel/entry/Makefile | |
| parent | 6823ecabf03031d610a6c5afe7ed4b4fd659a99f (diff) | |
| download | linux-stable-142781e108b13b2b0e8f035cfb5bfbbc8f14d887.tar.gz linux-stable-142781e108b13b2b0e8f035cfb5bfbbc8f14d887.tar.bz2 linux-stable-142781e108b13b2b0e8f035cfb5bfbbc8f14d887.zip | |
entry: Provide generic syscall entry functionality
On syscall entry certain work needs to be done:
- Establish state (lockdep, context tracking, tracing)
- Conditional work (ptrace, seccomp, audit...)
This code is needlessly duplicated and different in all
architectures.
Provide a generic version based on the x86 implementation which has all the
RCU and instrumentation bits right.
As interrupt/exception entry from user space needs parts of the same
functionality, provide a function for this as well.
syscall_enter_from_user_mode() and irqentry_enter_from_user_mode() must be
called right after the low level ASM entry. The calling code must be
non-instrumentable. After the functions returns state is correct and the
subsequent functions can be instrumented.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200722220519.513463269@linutronix.de
Diffstat (limited to 'kernel/entry/Makefile')
| -rw-r--r-- | kernel/entry/Makefile | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/entry/Makefile b/kernel/entry/Makefile new file mode 100644 index 000000000000..c207d202bf3a --- /dev/null +++ b/kernel/entry/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Prevent the noinstr section from being pestered by sanitizer and other goodies +# as long as these things cannot be disabled per function. +KASAN_SANITIZE := n +UBSAN_SANITIZE := n +KCOV_INSTRUMENT := n + +CFLAGS_REMOVE_common.o = -fstack-protector -fstack-protector-strong +CFLAGS_common.o += -fno-stack-protector + +obj-$(CONFIG_GENERIC_ENTRY) += common.o |