From b713da69e4c91d9addada4e58d26df1c9b5cd840 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 9 Jul 2017 15:53:17 -0400
Subject: signal: unify compat_siginfo_t

--EWB Added #ifdef CONFIG_X86_X32_ABI to arch/x86/kernel/signal_compat.c
      Changed #ifdef CONFIG_X86_X32 to #ifdef CONFIG_X86_X32_ABI in
      linux/compat.h

      CONFIG_X86_X32 is set when the user requests X32 support.

      CONFIG_X86_X32_ABI is set when the user requests X32 support
      and the tool-chain has X32 allowing X32 support to be built.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
 include/linux/compat.h | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

(limited to 'include/linux')

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 0fc36406f32c..8f8e3ef247de 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -157,6 +157,96 @@ struct compat_sigaction {
 	compat_sigset_t			sa_mask __packed;
 };
 
+typedef union compat_sigval {
+	compat_int_t	sival_int;
+	compat_uptr_t	sival_ptr;
+} compat_sigval_t;
+
+typedef struct compat_siginfo {
+	int si_signo;
+#ifndef __ARCH_HAS_SWAPPED_SIGINFO
+	int si_errno;
+	int si_code;
+#else
+	int si_code;
+	int si_errno;
+#endif
+
+	union {
+		int _pad[128/sizeof(int) - 3];
+
+		/* kill() */
+		struct {
+			compat_pid_t _pid;	/* sender's pid */
+			__compat_uid32_t _uid;	/* sender's uid */
+		} _kill;
+
+		/* POSIX.1b timers */
+		struct {
+			compat_timer_t _tid;	/* timer id */
+			int _overrun;		/* overrun count */
+			compat_sigval_t _sigval;	/* same as below */
+		} _timer;
+
+		/* POSIX.1b signals */
+		struct {
+			compat_pid_t _pid;	/* sender's pid */
+			__compat_uid32_t _uid;	/* sender's uid */
+			compat_sigval_t _sigval;
+		} _rt;
+
+		/* SIGCHLD */
+		struct {
+			compat_pid_t _pid;	/* which child */
+			__compat_uid32_t _uid;	/* sender's uid */
+			int _status;		/* exit code */
+			compat_clock_t _utime;
+			compat_clock_t _stime;
+		} _sigchld;
+
+#ifdef CONFIG_X86_X32_ABI
+		/* SIGCHLD (x32 version) */
+		struct {
+			compat_pid_t _pid;	/* which child */
+			__compat_uid32_t _uid;	/* sender's uid */
+			int _status;		/* exit code */
+			compat_s64 _utime;
+			compat_s64 _stime;
+		} _sigchld_x32;
+#endif
+
+		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
+		struct {
+			compat_uptr_t _addr;	/* faulting insn/memory ref. */
+#ifdef __ARCH_SI_TRAPNO
+			int _trapno;	/* TRAP # which caused the signal */
+#endif
+			short int _addr_lsb;	/* Valid LSB of the reported address. */
+			union {
+				/* used when si_code=SEGV_BNDERR */
+				struct {
+					compat_uptr_t _lower;
+					compat_uptr_t _upper;
+				} _addr_bnd;
+				/* used when si_code=SEGV_PKUERR */
+				u32 _pkey;
+			};
+		} _sigfault;
+
+		/* SIGPOLL */
+		struct {
+			compat_long_t _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
+			int _fd;
+		} _sigpoll;
+
+		struct {
+			compat_uptr_t _call_addr; /* calling user insn */
+			int _syscall;	/* triggering system call number */
+			unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
+		} _sigsys;
+	} _sifields;
+} compat_siginfo_t;
+
 /*
  * These functions operate on 32- or 64-bit specs depending on
  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
-- 
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