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Date: Tue, 8 Sep 2015 07:25:13 -0700
From: tip-bot for Ingo Molnar <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: peterz@...radead.org, luto@...capital.net, hpa@...or.com,
oleg@...hat.com, bp@...en8.de, mikko.rapeli@....fi,
dvlasenk@...hat.com, tglx@...utronix.de, brgerst@...il.com,
linux-kernel@...r.kernel.org, mingo@...nel.org,
torvalds@...ux-foundation.org
Subject: [tip:x86/headers] x86/headers: Clean up uapi/asm/sigcontext32.h
Commit-ID: c3f4986fb0774bb13feb4bade1276bed2ba8a3db
Gitweb: http://git.kernel.org/tip/c3f4986fb0774bb13feb4bade1276bed2ba8a3db
Author: Ingo Molnar <mingo@...nel.org>
AuthorDate: Sat, 5 Sep 2015 09:32:30 +0200
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 8 Sep 2015 10:03:55 +0200
x86/headers: Clean up uapi/asm/sigcontext32.h
Clean up sigcontext32.h a bit:
- use consistent and readable vertical spacing
- fix, harmonize and extend comments
No field name has been changed, user-space might be relying on
them.
Acked-by: Mikko Rapeli <mikko.rapeli@....fi>
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: Oleg Nesterov <oleg@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Link: http://lkml.kernel.org/r/1441438363-9999-3-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/include/uapi/asm/sigcontext32.h | 110 ++++++++++++++++---------------
1 file changed, 58 insertions(+), 52 deletions(-)
diff --git a/arch/x86/include/uapi/asm/sigcontext32.h b/arch/x86/include/uapi/asm/sigcontext32.h
index ff7826c..6ff4fba 100644
--- a/arch/x86/include/uapi/asm/sigcontext32.h
+++ b/arch/x86/include/uapi/asm/sigcontext32.h
@@ -1,79 +1,85 @@
#ifndef _ASM_X86_SIGCONTEXT32_H
#define _ASM_X86_SIGCONTEXT32_H
+/* Signal context definitions for compat 32-bit programs: */
+
#include <linux/types.h>
#include <asm/sigcontext.h>
-/* signal context for 32bit programs. */
-
-#define X86_FXSR_MAGIC 0x0000
-
+/* 10-byte legacy floating point register: */
struct _fpreg {
- unsigned short significand[4];
- unsigned short exponent;
+ unsigned short significand[4];
+ unsigned short exponent;
};
+/* 16-byte floating point register: */
struct _fpxreg {
- unsigned short significand[4];
- unsigned short exponent;
- unsigned short padding[3];
+ unsigned short significand[4];
+ unsigned short exponent;
+ unsigned short padding[3];
};
+/* 16-byte XMM vector register: */
struct _xmmreg {
__u32 element[4];
};
-/* FSAVE frame with extensions */
+#define X86_FXSR_MAGIC 0x0000
+
+/* FXSAVE frame: FSAVE frame with extensions */
struct _fpstate_ia32 {
- /* Regular FPU environment */
- __u32 cw;
- __u32 sw;
- __u32 tag; /* not compatible to 64bit twd */
- __u32 ipoff;
- __u32 cssel;
- __u32 dataoff;
- __u32 datasel;
- struct _fpreg _st[8];
- unsigned short status;
- unsigned short magic; /* 0xffff = regular FPU data only */
+ /* Regular FPU environment: */
+ __u32 cw;
+ __u32 sw;
+ __u32 tag; /* Not compatible with the 64-bit frame */
+ __u32 ipoff;
+ __u32 cssel;
+ __u32 dataoff;
+ __u32 datasel;
+ struct _fpreg _st[8];
+ unsigned short status;
+ unsigned short magic; /* 0xffff: regular FPU data only */
+ /* 0x0000: FXSR data */
- /* FXSR FPU environment */
- __u32 _fxsr_env[6];
- __u32 mxcsr;
- __u32 reserved;
- struct _fpxreg _fxsr_st[8];
- struct _xmmreg _xmm[8]; /* It's actually 16 */
- __u32 padding[44];
+ /* Extended FXSR FPU environment: */
+ __u32 _fxsr_env[6];
+ __u32 mxcsr;
+ __u32 reserved;
+ struct _fpxreg _fxsr_st[8];
+ struct _xmmreg _xmm[8]; /* The first 8 XMM registers */
+ __u32 padding[44]; /* The second 8 XMM registers plus padding */
union {
- __u32 padding2[12];
- struct _fpx_sw_bytes sw_reserved;
+ __u32 padding2[12];
+ /* Might encode xstate extensions, see asm/sigcontext.h: */
+ struct _fpx_sw_bytes sw_reserved;
};
};
+/* 32-bit compat sigcontext: */
struct sigcontext_ia32 {
- unsigned short gs, __gsh;
- unsigned short fs, __fsh;
- unsigned short es, __esh;
- unsigned short ds, __dsh;
- unsigned int di;
- unsigned int si;
- unsigned int bp;
- unsigned int sp;
- unsigned int bx;
- unsigned int dx;
- unsigned int cx;
- unsigned int ax;
- unsigned int trapno;
- unsigned int err;
- unsigned int ip;
- unsigned short cs, __csh;
- unsigned int flags;
- unsigned int sp_at_signal;
- unsigned short ss, __ssh;
- unsigned int fpstate; /* really (struct _fpstate_ia32 *) */
- unsigned int oldmask;
- unsigned int cr2;
+ unsigned short gs, __gsh;
+ unsigned short fs, __fsh;
+ unsigned short es, __esh;
+ unsigned short ds, __dsh;
+ unsigned int di;
+ unsigned int si;
+ unsigned int bp;
+ unsigned int sp;
+ unsigned int bx;
+ unsigned int dx;
+ unsigned int cx;
+ unsigned int ax;
+ unsigned int trapno;
+ unsigned int err;
+ unsigned int ip;
+ unsigned short cs, __csh;
+ unsigned int flags;
+ unsigned int sp_at_signal;
+ unsigned short ss, __ssh;
+ unsigned int fpstate; /* Pointer to 'struct _fpstate_ia32' */
+ unsigned int oldmask;
+ unsigned int cr2;
};
#endif /* _ASM_X86_SIGCONTEXT32_H */
--
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