1cdde19109
Jakub Jelinek reported that some user-space code that relies on
kernel headers has built dependency on the sigcontext->eip/rip
register names - which have been unified in commit:
commit 742fa54a62
Author: H. Peter Anvin <hpa@zytor.com>
Date: Wed Jan 30 13:30:56 2008 +0100
x86: use generic register names in struct sigcontext
so give the old layout to user-space. This is not particularly
pretty, but it's an ABI so there's no danger of the two definitions
getting out of sync.
Reported-by: Jakub Jelinek <jakub@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
205 lines
4.5 KiB
C
205 lines
4.5 KiB
C
#ifndef _ASM_X86_SIGCONTEXT_H
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#define _ASM_X86_SIGCONTEXT_H
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#include <linux/compiler.h>
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#include <asm/types.h>
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#ifdef __i386__
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/*
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* As documented in the iBCS2 standard..
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*
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* The first part of "struct _fpstate" is just the normal i387
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* hardware setup, the extra "status" word is used to save the
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* coprocessor status word before entering the handler.
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*
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* Pentium III FXSR, SSE support
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* Gareth Hughes <gareth@valinux.com>, May 2000
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*
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* The FPU state data structure has had to grow to accommodate the
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* extended FPU state required by the Streaming SIMD Extensions.
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* There is no documented standard to accomplish this at the moment.
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*/
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struct _fpreg {
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unsigned short significand[4];
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unsigned short exponent;
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};
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struct _fpxreg {
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unsigned short significand[4];
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unsigned short exponent;
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unsigned short padding[3];
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};
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struct _xmmreg {
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unsigned long element[4];
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};
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struct _fpstate {
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/* Regular FPU environment */
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unsigned long cw;
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unsigned long sw;
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unsigned long tag;
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unsigned long ipoff;
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unsigned long cssel;
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unsigned long dataoff;
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unsigned long datasel;
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struct _fpreg _st[8];
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unsigned short status;
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unsigned short magic; /* 0xffff = regular FPU data only */
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/* FXSR FPU environment */
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unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */
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unsigned long mxcsr;
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unsigned long reserved;
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struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
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struct _xmmreg _xmm[8];
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unsigned long padding[56];
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};
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#define X86_FXSR_MAGIC 0x0000
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#ifdef __KERNEL__
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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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struct _fpstate __user * fpstate;
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unsigned long oldmask;
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unsigned long cr2;
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};
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#else /* __KERNEL__ */
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/*
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* User-space might still rely on the old definition:
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*/
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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 edi;
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unsigned long esi;
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unsigned long ebp;
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unsigned long esp;
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unsigned long ebx;
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unsigned long edx;
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unsigned long ecx;
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unsigned long eax;
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unsigned long trapno;
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unsigned long err;
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unsigned long eip;
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unsigned short cs, __csh;
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unsigned long eflags;
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unsigned long esp_at_signal;
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unsigned short ss, __ssh;
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struct _fpstate __user * fpstate;
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unsigned long oldmask;
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unsigned long cr2;
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};
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#endif /* !__KERNEL__ */
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#else /* __i386__ */
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/* FXSAVE frame */
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/* Note: reserved1/2 may someday contain valuable data. Always save/restore
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them when you change signal frames. */
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struct _fpstate {
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__u16 cwd;
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__u16 swd;
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__u16 twd; /* Note this is not the same as the 32bit/x87/FSAVE twd */
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__u16 fop;
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__u64 rip;
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__u64 rdp;
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__u32 mxcsr;
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__u32 mxcsr_mask;
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__u32 st_space[32]; /* 8*16 bytes for each FP-reg */
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__u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg */
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__u32 reserved2[24];
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};
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#ifdef __KERNEL__
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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 gs;
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unsigned short fs;
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unsigned short __pad0;
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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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struct _fpstate __user *fpstate; /* zero when no FPU context */
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unsigned long reserved1[8];
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};
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#else /* __KERNEL__ */
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/*
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* User-space might still rely on the old definition:
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*/
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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 rdi;
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unsigned long rsi;
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unsigned long rbp;
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unsigned long rbx;
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unsigned long rdx;
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unsigned long rax;
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unsigned long rcx;
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unsigned long rsp;
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unsigned long rip;
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unsigned long eflags; /* RFLAGS */
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unsigned short cs;
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unsigned short gs;
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unsigned short fs;
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unsigned short __pad0;
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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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struct _fpstate __user *fpstate; /* zero when no FPU context */
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unsigned long reserved1[8];
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};
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#endif /* !__KERNEL__ */
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#endif /* !__i386__ */
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#endif
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