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2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/include/uapi/asm-generic/signal-defs.h
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@@ -4,6 +4,69 @@
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 #include <linux/compiler.h>
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+/*
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+ * SA_FLAGS values:
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+ *
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+ * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
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+ * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
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+ * SA_SIGINFO delivers the signal with SIGINFO structs.
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+ * SA_ONSTACK indicates that a registered stack_t will be used.
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+ * SA_RESTART flag to get restarting signals (which were the default long ago)
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+ * SA_NODEFER prevents the current signal from being masked in the handler.
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+ * SA_RESETHAND clears the handler when the signal is delivered.
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+ * SA_UNSUPPORTED is a flag bit that will never be supported. Kernels from
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+ * before the introduction of SA_UNSUPPORTED did not clear unknown bits from
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+ * sa_flags when read using the oldact argument to sigaction and rt_sigaction,
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+ * so this bit allows flag bit support to be detected from userspace while
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+ * allowing an old kernel to be distinguished from a kernel that supports every
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+ * flag bit.
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+ * SA_EXPOSE_TAGBITS exposes an architecture-defined set of tag bits in
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+ * siginfo.si_addr.
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+ *
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+ * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
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+ * Unix names RESETHAND and NODEFER respectively.
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+ */
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+#ifndef SA_NOCLDSTOP
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+#define SA_NOCLDSTOP	0x00000001
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+#endif
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+#ifndef SA_NOCLDWAIT
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+#define SA_NOCLDWAIT	0x00000002
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+#endif
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+#ifndef SA_SIGINFO
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+#define SA_SIGINFO	0x00000004
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+#endif
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+/* 0x00000008 used on alpha, mips, parisc */
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+/* 0x00000010 used on alpha, parisc */
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+/* 0x00000020 used on alpha, parisc, sparc */
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+/* 0x00000040 used on alpha, parisc */
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+/* 0x00000080 used on parisc */
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+/* 0x00000100 used on sparc */
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+/* 0x00000200 used on sparc */
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+#define SA_UNSUPPORTED	0x00000400
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+#define SA_EXPOSE_TAGBITS	0x00000800
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+/* 0x00010000 used on mips */
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+/* 0x01000000 used on x86 */
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+/* 0x02000000 used on x86 */
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+/*
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+ * New architectures should not define the obsolete
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+ *	SA_RESTORER	0x04000000
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+ */
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+#ifndef SA_ONSTACK
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+#define SA_ONSTACK	0x08000000
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+#endif
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+#ifndef SA_RESTART
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+#define SA_RESTART	0x10000000
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+#endif
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+#ifndef SA_NODEFER
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+#define SA_NODEFER	0x40000000
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+#endif
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+#ifndef SA_RESETHAND
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+#define SA_RESETHAND	0x80000000
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+#endif
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+
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+#define SA_NOMASK	SA_NODEFER
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+#define SA_ONESHOT	SA_RESETHAND
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+
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 #ifndef SIG_BLOCK
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 #define SIG_BLOCK          0	/* for blocking signals */
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 #endif