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Message-Id: <1441438363-9999-11-git-send-email-mingo@kernel.org>
Date: Sat, 5 Sep 2015 09:32:38 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Mikko Rapeli <mikko.rapeli@....fi>,
Andy Lutomirski <luto@...capital.net>,
Andrew Morton <akpm@...ux-foundation.org>,
Denys Vlasenko <dvlasenk@...hat.com>,
Brian Gerst <brgerst@...il.com>,
Peter Zijlstra <peterz@...radead.org>,
Borislav Petkov <bp@...en8.de>,
"H. Peter Anvin" <hpa@...or.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Oleg Nesterov <oleg@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 10/15] x86/headers: Move the 'struct sigcontext' definitions into the UAPI header
Our goal is to eliminate the duplicate struct sigcontext_ia32 definition, so
move the kernel's primary sigcontext type into the UAPI header, defining
these two variants:
struct sigcontext_32
struct sigcontext_64
... and map them to 'struct sigcontext'.
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mikko Rapeli <mikko.rapeli@....fi>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/include/asm/sigcontext.h | 73 ------------------------------
arch/x86/include/uapi/asm/sigcontext.h | 83 ++++++++++++++++++++++++++++++++++
2 files changed, 83 insertions(+), 73 deletions(-)
diff --git a/arch/x86/include/asm/sigcontext.h b/arch/x86/include/asm/sigcontext.h
index b9c2bd6402df..25815f00b4ff 100644
--- a/arch/x86/include/asm/sigcontext.h
+++ b/arch/x86/include/asm/sigcontext.h
@@ -3,77 +3,4 @@
#include <uapi/asm/sigcontext.h>
-#ifdef __i386__
-struct sigcontext {
- __u16 gs, __gsh;
- __u16 fs, __fsh;
- __u16 es, __esh;
- __u16 ds, __dsh;
- __u32 di;
- __u32 si;
- __u32 bp;
- __u32 sp;
- __u32 bx;
- __u32 dx;
- __u32 cx;
- __u32 ax;
- __u32 trapno;
- __u32 err;
- __u32 ip;
- __u16 cs, __csh;
- __u32 flags;
- __u32 sp_at_signal;
- __u16 ss, __ssh;
-
- /*
- * fpstate is really (struct _fpstate *) or (struct _xstate *)
- * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
- * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
- * of extended memory layout. See comments at the definition of
- * (struct _fpx_sw_bytes)
- */
- void __user *fpstate; /* Zero when no FPU/extended context */
- __u32 oldmask;
- __u32 cr2;
-};
-#else /* __x86_64__: */
-struct sigcontext {
- __u64 r8;
- __u64 r9;
- __u64 r10;
- __u64 r11;
- __u64 r12;
- __u64 r13;
- __u64 r14;
- __u64 r15;
- __u64 di;
- __u64 si;
- __u64 bp;
- __u64 bx;
- __u64 dx;
- __u64 ax;
- __u64 cx;
- __u64 sp;
- __u64 ip;
- __u64 flags;
- __u16 cs;
- __u16 gs;
- __u16 fs;
- __u16 __pad0;
- __u64 err;
- __u64 trapno;
- __u64 oldmask;
- __u64 cr2;
-
- /*
- * fpstate is really (struct _fpstate *) or (struct _xstate *)
- * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
- * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
- * of extended memory layout. See comments at the definition of
- * (struct _fpx_sw_bytes)
- */
- void __user *fpstate; /* Zero when no FPU/extended context */
- __u64 reserved1[8];
-};
-#endif /* !__x86_64__ */
#endif /* _ASM_X86_SIGCONTEXT_H */
diff --git a/arch/x86/include/uapi/asm/sigcontext.h b/arch/x86/include/uapi/asm/sigcontext.h
index ca542e37c783..3591cef6d7d2 100644
--- a/arch/x86/include/uapi/asm/sigcontext.h
+++ b/arch/x86/include/uapi/asm/sigcontext.h
@@ -190,6 +190,89 @@ struct _xstate {
/* New processor state extensions go here: */
};
+struct sigcontext_32 {
+ __u16 gs, __gsh;
+ __u16 fs, __fsh;
+ __u16 es, __esh;
+ __u16 ds, __dsh;
+ __u32 di;
+ __u32 si;
+ __u32 bp;
+ __u32 sp;
+ __u32 bx;
+ __u32 dx;
+ __u32 cx;
+ __u32 ax;
+ __u32 trapno;
+ __u32 err;
+ __u32 ip;
+ __u16 cs, __csh;
+ __u32 flags;
+ __u32 sp_at_signal;
+ __u16 ss, __ssh;
+
+ /*
+ * fpstate is really (struct _fpstate *) or (struct _xstate *)
+ * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
+ * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
+ * of extended memory layout. See comments at the definition of
+ * (struct _fpx_sw_bytes)
+ */
+ void __user *fpstate; /* Zero when no FPU/extended context */
+ __u32 oldmask;
+ __u32 cr2;
+};
+
+struct sigcontext_64 {
+ __u64 r8;
+ __u64 r9;
+ __u64 r10;
+ __u64 r11;
+ __u64 r12;
+ __u64 r13;
+ __u64 r14;
+ __u64 r15;
+ __u64 di;
+ __u64 si;
+ __u64 bp;
+ __u64 bx;
+ __u64 dx;
+ __u64 ax;
+ __u64 cx;
+ __u64 sp;
+ __u64 ip;
+ __u64 flags;
+ __u16 cs;
+ __u16 gs;
+ __u16 fs;
+ __u16 __pad0;
+ __u64 err;
+ __u64 trapno;
+ __u64 oldmask;
+ __u64 cr2;
+
+ /*
+ * fpstate is really (struct _fpstate *) or (struct _xstate *)
+ * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
+ * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
+ * of extended memory layout. See comments at the definition of
+ * (struct _fpx_sw_bytes)
+ */
+ void __user *fpstate; /* Zero when no FPU/extended context */
+ __u64 reserved1[8];
+};
+
+/*
+ * Create the real 'struct sigcontext' type:
+ */
+#ifdef __KERNEL__
+# ifdef __i386__
+# define sigcontext sigcontext_32
+# else
+# define sigcontext sigcontext_64
+# endif
+#endif
+
/*
* The old user-space sigcontext definition, just in case user-space still
* relies on it. The kernel definition (in asm/sigcontext.h) has unified
--
2.1.4
--
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