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authorThomas Gleixner <tglx@linutronix.de>2020-07-22 23:59:56 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-07-24 14:59:03 +0200
commit142781e108b13b2b0e8f035cfb5bfbbc8f14d887 (patch)
treee11ce626a38bf77bd2ec08499f2199534e2a9a15 /kernel/Makefile
parentseccomp: Provide stub for __secure_computing() (diff)
downloadlinux-142781e108b13b2b0e8f035cfb5bfbbc8f14d887.tar.xz
linux-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/Makefile')
-rw-r--r--kernel/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index f3218bc5ec69..fde2000d0d0d 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -48,6 +48,7 @@ obj-y += irq/
obj-y += rcu/
obj-y += livepatch/
obj-y += dma/
+obj-y += entry/
obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
obj-$(CONFIG_FREEZER) += freezer.o