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signal: Expose SYS_USER_DISPATCH si_code type

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SYS_USER_DISPATCH will be triggered when a syscall is sent to userspace
by the Syscall User Dispatch mechanism.  This adjusts eventual
BUILD_BUG_ON around the tree.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20201127193238.821364-3-krisman@collabora.com
This commit is contained in:
Gabriel Krisman Bertazi 2020-11-27 14:32:33 -05:00 committed by Thomas Gleixner
parent c5c878125a
commit 1d7637d89c
2 changed files with 3 additions and 2 deletions
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2
arch/x86/kernel/signal_compat.c
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@ -31,7 +31,7 @@ static inline void signal_compat_build_tests(void)
BUILD_BUG_ON(NSIGBUS != 5);
BUILD_BUG_ON(NSIGTRAP != 5);
BUILD_BUG_ON(NSIGCHLD != 6);
BUILD_BUG_ON(NSIGSYS != 1);
BUILD_BUG_ON(NSIGSYS != 2);
/* This is part of the ABI and can never change in size: */
BUILD_BUG_ON(sizeof(compat_siginfo_t) != 128);

3
include/uapi/asm-generic/siginfo.h
View File

@ -286,7 +286,8 @@ typedef struct siginfo {
* SIGSYS si_codes
*/
#define SYS_SECCOMP 1 /* seccomp triggered */
#define NSIGSYS 1
#define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */
#define NSIGSYS 2
/*
* SIGEMT si_codes