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Subject[PATCH v4 07/24] arm64:ilp32: share signal structures between ILP32 and LP64 ABIs
Date
From: Andrew Pinski <apinski@cavium.com>

Defines the macros which allow the signal structures to be the same between
ILP32 and LP64.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
---
arch/arm64/include/uapi/asm/siginfo.h | 21 +++++++++++++++++++++
arch/arm64/include/uapi/asm/signal.h | 32 ++++++++++++++++++++++++++++++++
include/uapi/asm-generic/siginfo.h | 17 +++++++++++++----
include/uapi/asm-generic/signal.h | 27 +++++++++++++++++++++++----
4 files changed, 89 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/uapi/asm/siginfo.h b/arch/arm64/include/uapi/asm/siginfo.h
index 5a74a08..1a6aa32 100644
--- a/arch/arm64/include/uapi/asm/siginfo.h
+++ b/arch/arm64/include/uapi/asm/siginfo.h
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2014 Cavium Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -18,6 +19,26 @@

#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))

+#ifdef __ILP32__
+# ifdef __AARCH64EB__
+# define __SIGINFO_INNER(type, field) \
+ int __pad#field; \
+ type field
+# else
+# define __SIGINFO_INNER(type, field) \
+ type field; \
+ int __pad#field
+# endif
+
+# undef __SIGINFO_VOIDPOINTER
+# define __SIGINFO_VOIDPOINTER(field) \
+ __SIGINFO_INNER(void __user*, field)
+# undef __SIGINFO_BAND
+
+# define __SIGINFO_BAND(field) \
+ __SIGINFO_INNER(long, field)
+#endif
+
#include <asm-generic/siginfo.h>

#endif
diff --git a/arch/arm64/include/uapi/asm/signal.h b/arch/arm64/include/uapi/asm/signal.h
index 8d1e723..d90d53b 100644
--- a/arch/arm64/include/uapi/asm/signal.h
+++ b/arch/arm64/include/uapi/asm/signal.h
@@ -19,6 +19,38 @@
/* Required for AArch32 compatibility. */
#define SA_RESTORER 0x04000000

+/* For ILP32, sigset should be the same size fields as LP64 so use
+ unsigned long long. */
+#ifdef __ILP32__
+#define __SIGSET_INNER_TYPE __extension__ unsigned long long
+#define _NSIG_BPW 64
+
+# ifdef __AARCH64EB__
+# define __SIGNAL_INNER(type, field) \
+ __extension__ struct { \
+ int __pad_##field; \
+ type field; \
+ } __attribute__((aligned(8)))
+# else
+# define __SIGNAL_INNER(type, field) \
+ __extension__ struct { \
+ type field; \
+ int __pad_##field; \
+ } __attribute__((aligned(8)))
+# endif
+
+# define __SIGACTION_HANDLER(field) \
+ __SIGNAL_INNER(__sighandler_t, field)
+
+
+#define __SIGACTION_FLAGS(field) \
+ __extension__ unsigned long long field
+
+#define __SIGACTION_RESTORER(field) \
+ __SIGNAL_INNER(__sigrestore_t, field)
+
+#endif
+
#include <asm-generic/signal.h>

#endif
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 1e35520..be640a9 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -4,9 +4,17 @@
#include <linux/compiler.h>
#include <linux/types.h>

+#ifndef __SIGINFO_VOIDPOINTER
+#define __SIGINFO_VOIDPOINTER(field) void __user *field
+#endif
+
+#ifndef __SIGINFO_BAND
+#define __SIGINFO_BAND(field) __ARCH_SI_BAND_T field
+#endif
+
typedef union sigval {
int sival_int;
- void __user *sival_ptr;
+ __SIGINFO_VOIDPOINTER(sival_ptr);
} sigval_t;

/*
@@ -86,7 +94,7 @@ typedef struct siginfo {

/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
struct {
- void __user *_addr; /* faulting insn/memory ref. */
+ __SIGINFO_VOIDPOINTER(_addr); /* faulting insn/memory ref. */
#ifdef __ARCH_SI_TRAPNO
int _trapno; /* TRAP # which caused the signal */
#endif
@@ -99,13 +107,13 @@ typedef struct siginfo {

/* SIGPOLL */
struct {
- __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
+ __SIGINFO_BAND(_band); /* POLL_IN, POLL_OUT, POLL_MSG */
int _fd;
} _sigpoll;

/* SIGSYS */
struct {
- void __user *_call_addr; /* calling user insn */
+ __SIGINFO_VOIDPOINTER(_call_addr); /* calling user insn */
int _syscall; /* triggering system call number */
unsigned int _arch; /* AUDIT_ARCH_* of syscall */
} _sigsys;
@@ -290,6 +298,7 @@ typedef struct sigevent {
int _pad[SIGEV_PAD_SIZE];
int _tid;

+ /* Note these two are handled only in userspace */
struct {
void (*_function)(sigval_t);
void *_attribute; /* really pthread_attr_t */
diff --git a/include/uapi/asm-generic/signal.h b/include/uapi/asm-generic/signal.h
index 9df61f1..c4ce238 100644
--- a/include/uapi/asm-generic/signal.h
+++ b/include/uapi/asm-generic/signal.h
@@ -4,7 +4,9 @@
#include <linux/types.h>

#define _NSIG 64
+#ifndef _NSIG_BPW
#define _NSIG_BPW __BITS_PER_LONG
+#endif
#define _NSIG_WORDS (_NSIG / _NSIG_BPW)

#define SIGHUP 1
@@ -83,9 +85,13 @@
#define MINSIGSTKSZ 2048
#define SIGSTKSZ 8192

+#ifndef __SIGSET_INNER_TYPE
+#define __SIGSET_INNER_TYPE unsigned long
+#endif
+
#ifndef __ASSEMBLY__
typedef struct {
- unsigned long sig[_NSIG_WORDS];
+ __SIGSET_INNER_TYPE sig[_NSIG_WORDS];
} sigset_t;

/* not actually used, but required for linux/syscalls.h */
@@ -98,11 +104,24 @@ typedef unsigned long old_sigset_t;
#endif

#ifndef __KERNEL__
+
+#ifndef __SIGACTION_HANDLER
+#define __SIGACTION_HANDLER(field) __sighandler_t field
+#endif
+
+#ifndef __SIGACTION_FLAGS
+#define __SIGACTION_FLAGS(field) unsigned long field
+#endif
+
+#ifndef __SIGACTION_RESTORER
+#define __SIGACTION_RESTORER(field) __sigrestore_t field
+#endif
+
struct sigaction {
- __sighandler_t sa_handler;
- unsigned long sa_flags;
+ __SIGACTION_HANDLER(sa_handler);
+ __SIGACTION_FLAGS(sa_flags);
#ifdef SA_RESTORER
- __sigrestore_t sa_restorer;
+ __SIGACTION_RESTORER(sa_restorer);
#endif
sigset_t sa_mask; /* mask last for extensibility */
};
--
1.9.1


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