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cf99abace7
This follows a suggestion from Chuck Ebbert on how to make seccomp absolutely zerocost in schedule too. The only remaining footprint of seccomp is in terms of the bzImage size that becomes a few bytes (perhaps even a few kbytes) larger, measure it if you care in the embedded. Signed-off-by: Andrea Arcangeli <andrea@cpushare.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
41 lines
743 B
C
41 lines
743 B
C
#ifndef _LINUX_SECCOMP_H
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#define _LINUX_SECCOMP_H
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#ifdef CONFIG_SECCOMP
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#include <linux/thread_info.h>
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#include <asm/seccomp.h>
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typedef struct { int mode; } seccomp_t;
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extern void __secure_computing(int);
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static inline void secure_computing(int this_syscall)
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{
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if (unlikely(test_thread_flag(TIF_SECCOMP)))
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__secure_computing(this_syscall);
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}
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extern long prctl_get_seccomp(void);
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extern long prctl_set_seccomp(unsigned long);
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#else /* CONFIG_SECCOMP */
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typedef struct { } seccomp_t;
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#define secure_computing(x) do { } while (0)
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static inline long prctl_get_seccomp(void)
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{
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return -EINVAL;
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}
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static inline long prctl_set_seccomp(unsigned long arg2)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_SECCOMP */
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#endif /* _LINUX_SECCOMP_H */
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