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Date:	Thu,  5 Nov 2015 00:50:20 +0000
From:	Amanieu d'Antras <amanieu@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Amanieu d'Antras <amanieu@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Chris Metcalf <cmetcalf@...hip.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-mips@...ux-mips.org,
	linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-s390@...r.kernel.org, sparclinux@...r.kernel.org
Subject: [PATCH v2 01/20] compat: Add generic compat_siginfo_t

This matches the normal siginfo_t as closely as possible, unlike
some architecture-specific versions which are missing some fields.

Signed-off-by: Amanieu d'Antras <amanieu@...il.com>
---
 arch/arm64/include/asm/compat.h   |  2 ++
 arch/mips/include/asm/compat.h    |  1 +
 arch/parisc/include/asm/compat.h  |  2 ++
 arch/powerpc/include/asm/compat.h |  1 +
 arch/s390/include/asm/compat.h    |  2 ++
 arch/sparc/include/asm/compat.h   |  1 +
 arch/tile/include/asm/compat.h    |  1 +
 arch/x86/include/asm/compat.h     |  2 ++
 include/linux/compat.h            | 66 ++++++++++++++++++++++++++++++++++++++-
 9 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index 7fbed69..ff4e294 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -155,6 +155,8 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
+
 typedef struct compat_siginfo {
 	int si_signo;
 	int si_errno;
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h
index c4bd54a..5f1f816 100644
--- a/arch/mips/include/asm/compat.h
+++ b/arch/mips/include/asm/compat.h
@@ -130,6 +130,7 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
 #define SI_PAD_SIZE32	(128/sizeof(int) - 3)
 
 typedef struct compat_siginfo {
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index 94710cf..e0be05f 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -134,6 +134,8 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
+
 typedef struct compat_siginfo {
 	int si_signo;
 	int si_errno;
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 4f2df58..75b25ff 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -124,6 +124,7 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
 #define SI_PAD_SIZE32	(128/sizeof(int) - 3)
 
 typedef struct compat_siginfo {
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index d350ed9..ac73ac7 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -192,6 +192,8 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
+
 typedef struct compat_siginfo {
 	int	si_signo;
 	int	si_errno;
diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index 830502fe..0c80f59 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -153,6 +153,7 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
 #define SI_PAD_SIZE32	(128/sizeof(int) - 3)
 
 typedef struct compat_siginfo {
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h
index c14e36f..f9bba8d 100644
--- a/arch/tile/include/asm/compat.h
+++ b/arch/tile/include/asm/compat.h
@@ -115,6 +115,7 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
 #define COMPAT_SI_PAD_SIZE	(128/sizeof(int) - 3)
 
 typedef struct compat_siginfo {
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h
index acdee09..69176b4 100644
--- a/arch/x86/include/asm/compat.h
+++ b/arch/x86/include/asm/compat.h
@@ -130,6 +130,8 @@ typedef union compat_sigval {
 	compat_uptr_t	sival_ptr;
 } compat_sigval_t;
 
+#define HAVE_ARCH_COMPAT_SIGINFO_T
+
 typedef struct compat_siginfo {
 	int si_signo;
 	int si_errno;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index a76c917..e51574c 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -196,7 +196,71 @@ struct compat_rusage {
 extern int put_compat_rusage(const struct rusage *,
 			     struct compat_rusage __user *);
 
-struct compat_siginfo;
+#ifndef HAVE_ARCH_COMPAT_SIGINFO_T
+typedef struct compat_siginfo {
+	int si_signo;
+	int si_errno;
+	int si_code;
+
+	union {
+		int _pad[128 / sizeof(int) - 3];
+
+		/* kill() */
+		struct {
+			compat_pid_t _pid;	/* sender's pid */
+			compat_uid_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_uid_t _uid;	/* sender's uid */
+			compat_sigval_t _sigval;
+		} _rt;
+
+		/* SIGCHLD */
+		struct {
+			compat_pid_t _pid;	/* which child */
+			compat_uid_t _uid;	/* sender's uid */
+			int _status;		/* exit code */
+			compat_clock_t _utime;
+			compat_clock_t _stime;
+		} _sigchld;
+
+		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+		struct {
+			compat_uptr_t _addr;	/* faulting insn/memory ref. */
+#ifdef __ARCH_SI_TRAPNO
+			int _trapno;	/* TRAP # which caused the signal */
+#endif
+			short _addr_lsb; /* LSB of the reported address */
+			struct {
+				compat_uptr_t _lower;
+				compat_uptr_t _upper;
+			} _addr_bnd;
+		} _sigfault;
+
+		/* SIGPOLL */
+		struct {
+			compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
+			int _fd;
+		} _sigpoll;
+
+		struct {
+			compat_uptr_t _call_addr; /* calling insn */
+			int _syscall;	/* triggering system call number */
+			compat_uint_t _arch;	/* AUDIT_ARCH_* of syscall */
+		} _sigsys;
+	} _sifields;
+} compat_siginfo_t;
+#endif
 
 extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
 		struct compat_siginfo __user *, int,
-- 
2.6.2

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