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9a036b93a3
As far as I can tell, these fields have been set to zero on save and ignored on restore since Linux was imported into git. Rename them '__pad1' and '__pad2' to avoid confusion. This may also allow us to recycle them some day. This also adds a comment clarifying the history of those fields. I'm intentionally avoiding calling either of them '__pad0': the field formerly known as '__pad0' is now 'ss'. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/844f8490e938780c03355be4c9b69eb4c494bf4e.1426193719.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
#ifndef _ASM_X86_SIGCONTEXT_H
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#define _ASM_X86_SIGCONTEXT_H
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#include <uapi/asm/sigcontext.h>
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#ifdef __i386__
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struct sigcontext {
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unsigned short gs, __gsh;
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unsigned short fs, __fsh;
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unsigned short es, __esh;
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unsigned short ds, __dsh;
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unsigned long di;
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unsigned long si;
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unsigned long bp;
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unsigned long sp;
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unsigned long bx;
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unsigned long dx;
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unsigned long cx;
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unsigned long ax;
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unsigned long trapno;
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unsigned long err;
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unsigned long ip;
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unsigned short cs, __csh;
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unsigned long flags;
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unsigned long sp_at_signal;
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unsigned short ss, __ssh;
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/*
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* fpstate is really (struct _fpstate *) or (struct _xstate *)
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* depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
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* bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
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* of extended memory layout. See comments at the definition of
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* (struct _fpx_sw_bytes)
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*/
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void __user *fpstate; /* zero when no FPU/extended context */
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unsigned long oldmask;
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unsigned long cr2;
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};
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#else /* __i386__ */
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struct sigcontext {
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unsigned long r8;
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unsigned long r9;
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unsigned long r10;
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unsigned long r11;
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unsigned long r12;
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unsigned long r13;
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unsigned long r14;
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unsigned long r15;
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unsigned long di;
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unsigned long si;
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unsigned long bp;
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unsigned long bx;
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unsigned long dx;
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unsigned long ax;
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unsigned long cx;
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unsigned long sp;
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unsigned long ip;
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unsigned long flags;
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unsigned short cs;
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unsigned short __pad2; /* Was called gs, but was always zero. */
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unsigned short __pad1; /* Was called fs, but was always zero. */
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unsigned short ss;
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unsigned long err;
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unsigned long trapno;
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unsigned long oldmask;
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unsigned long cr2;
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/*
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* fpstate is really (struct _fpstate *) or (struct _xstate *)
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* depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
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* bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
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* of extended memory layout. See comments at the definition of
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* (struct _fpx_sw_bytes)
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*/
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void __user *fpstate; /* zero when no FPU/extended context */
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unsigned long reserved1[8];
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};
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#endif /* !__i386__ */
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#endif /* _ASM_X86_SIGCONTEXT_H */
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