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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-07-23 00:00:03 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-07-24 15:04:58 +0200 |
| commit | 0bf019ea59e330770883ede4499d7f711d8c3adf (patch) | |
| tree | 07150fe5b0a97ab49df838b06a6445bf9192eaf0 | |
| parent | a377ac1cd9d7b9ac8d546dceb3d74956fbfd443f (diff) | |
| download | linux-0bf019ea59e330770883ede4499d7f711d8c3adf.tar.bz2 | |
x86/ptrace: Provide pt_regs helper for entry/exit
As a preparatory step for moving the syscall and interrupt entry/exit
handling into generic code, provide a pt_regs helper which retrieves the
interrupt state from pt_regs. This is required to check whether interrupts
are reenabled by return from interrupt/exception.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20200722220520.258511584@linutronix.de
| -rw-r--r-- | arch/x86/include/asm/ptrace.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h index 255b2dde2c1b..40aa69d04862 100644 --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h @@ -209,6 +209,11 @@ static inline void user_stack_pointer_set(struct pt_regs *regs, regs->sp = val; } +static __always_inline bool regs_irqs_disabled(struct pt_regs *regs) +{ + return !(regs->flags & X86_EFLAGS_IF); +} + /* Query offset/name of register from its name/offset */ extern int regs_query_register_offset(const char *name); extern const char *regs_query_register_name(unsigned int offset); |