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Date: Sat, 5 Sep 2015 09:32:32 +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 04/15] x86/headers: Separate out legacy user-space structure definitions
Better separate the user-space struct sigcontext definitions from
the kernel definitions, so that we can unify the kernel definitions
with sigcontext32.h.
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/uapi/asm/sigcontext.h | 119 ++++++++++++++++-----------------
1 file changed, 59 insertions(+), 60 deletions(-)
diff --git a/arch/x86/include/uapi/asm/sigcontext.h b/arch/x86/include/uapi/asm/sigcontext.h
index f89b2f1abe7c..40d6cbac08c6 100644
--- a/arch/x86/include/uapi/asm/sigcontext.h
+++ b/arch/x86/include/uapi/asm/sigcontext.h
@@ -124,36 +124,6 @@ struct _fpstate {
};
};
-# ifndef __KERNEL__
-/*
- * User-space might still rely on the old definition:
- */
-struct sigcontext {
- unsigned short gs, __gsh;
- unsigned short fs, __fsh;
- unsigned short es, __esh;
- unsigned short ds, __dsh;
- unsigned long edi;
- unsigned long esi;
- unsigned long ebp;
- unsigned long esp;
- unsigned long ebx;
- unsigned long edx;
- unsigned long ecx;
- unsigned long eax;
- unsigned long trapno;
- unsigned long err;
- unsigned long eip;
- unsigned short cs, __csh;
- unsigned long eflags;
- unsigned long esp_at_signal;
- unsigned short ss, __ssh;
- struct _fpstate __user *fpstate;
- unsigned long oldmask;
- unsigned long cr2;
-};
-# endif /* !__KERNEL__ */
-
#else /* __x86_64__: */
/*
@@ -186,10 +156,65 @@ struct _fpstate {
};
};
-# ifndef __KERNEL__
+#endif /* __x86_64__ */
+
+struct _header {
+ __u64 xfeatures;
+ __u64 reserved1[2];
+ __u64 reserved2[5];
+};
+
+struct _ymmh_state {
+ /* 16x YMM registers, 16 bytes each: */
+ __u32 ymmh_space[64];
+};
+
/*
- * User-space might still rely on the old definition:
+ * Extended state pointed to by sigcontext::fpstate.
+ *
+ * In addition to the fpstate, information encoded in _xstate::xstate_hdr
+ * indicates the presence of other extended state information supported
+ * by the CPU and kernel:
*/
+struct _xstate {
+ struct _fpstate fpstate;
+ struct _header xstate_hdr;
+ struct _ymmh_state ymmh;
+ /* New processor state extensions go here: */
+};
+
+/*
+ * The old user-space sigcontext definition, just in case user-space still
+ * relies on it. The kernel definition (in asm/sigcontext.h) has unified
+ * field names but otherwise the same layout.
+ */
+#ifndef __KERNEL__
+# ifdef __i386__
+struct sigcontext {
+ unsigned short gs, __gsh;
+ unsigned short fs, __fsh;
+ unsigned short es, __esh;
+ unsigned short ds, __dsh;
+ unsigned long edi;
+ unsigned long esi;
+ unsigned long ebp;
+ unsigned long esp;
+ unsigned long ebx;
+ unsigned long edx;
+ unsigned long ecx;
+ unsigned long eax;
+ unsigned long trapno;
+ unsigned long err;
+ unsigned long eip;
+ unsigned short cs, __csh;
+ unsigned long eflags;
+ unsigned long esp_at_signal;
+ unsigned short ss, __ssh;
+ struct _fpstate __user *fpstate;
+ unsigned long oldmask;
+ unsigned long cr2;
+};
+# else /* __x86_64__: */
struct sigcontext {
__u64 r8;
__u64 r9;
@@ -223,33 +248,7 @@ struct sigcontext {
# endif
__u64 reserved1[8];
};
-# endif /* !__KERNEL__ */
-
-#endif /* __x86_64__ */
-
-struct _header {
- __u64 xfeatures;
- __u64 reserved1[2];
- __u64 reserved2[5];
-};
-
-struct _ymmh_state {
- /* 16x YMM registers, 16 bytes each: */
- __u32 ymmh_space[64];
-};
-
-/*
- * Extended state pointed to by sigcontext::fpstate.
- *
- * In addition to the fpstate, information encoded in _xstate::xstate_hdr
- * indicates the presence of other extended state information supported
- * by the CPU and kernel:
- */
-struct _xstate {
- struct _fpstate fpstate;
- struct _header xstate_hdr;
- struct _ymmh_state ymmh;
- /* New processor state extensions go here: */
-};
+# endif /* __x86_64__ */
+#endif /* !__KERNEL__ */
#endif /* _UAPI_ASM_X86_SIGCONTEXT_H */
--
2.1.4
--
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