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x86/headers: Clean up uapi/asm/sigcontext32.h

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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@iki.fi>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1441438363-9999-3-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-09-05 09:32:30 +02:00
parent b76cb6c869
commit c3f4986fb0
1 changed files with 59 additions and 53 deletions
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112
arch/x86/include/uapi/asm/sigcontext32.h
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@ -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 */
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 */
#define X86_FXSR_MAGIC 0x0000
/* 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];
/* FXSAVE frame: FSAVE frame with extensions */
struct _fpstate_ia32 {
/* 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 */
/* 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 */