root/arch/x86/include/asm/sigframe.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_SIGFRAME_H
   3 #define _ASM_X86_SIGFRAME_H
   4 
   5 #include <uapi/asm/sigcontext.h>
   6 #include <asm/siginfo.h>
   7 #include <asm/ucontext.h>
   8 #include <linux/compat.h>
   9 
  10 #ifdef CONFIG_X86_32
  11 #define sigframe_ia32           sigframe
  12 #define rt_sigframe_ia32        rt_sigframe
  13 #define ucontext_ia32           ucontext
  14 #else /* !CONFIG_X86_32 */
  15 
  16 #ifdef CONFIG_IA32_EMULATION
  17 #include <asm/ia32.h>
  18 #endif /* CONFIG_IA32_EMULATION */
  19 
  20 #endif /* CONFIG_X86_32 */
  21 
  22 #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
  23 struct sigframe_ia32 {
  24         u32 pretcode;
  25         int sig;
  26         struct sigcontext_32 sc;
  27         /*
  28          * fpstate is unused. fpstate is moved/allocated after
  29          * retcode[] below. This movement allows to have the FP state and the
  30          * future state extensions (xsave) stay together.
  31          * And at the same time retaining the unused fpstate, prevents changing
  32          * the offset of extramask[] in the sigframe and thus prevent any
  33          * legacy application accessing/modifying it.
  34          */
  35         struct _fpstate_32 fpstate_unused;
  36 #ifdef CONFIG_IA32_EMULATION
  37         unsigned int extramask[_COMPAT_NSIG_WORDS-1];
  38 #else /* !CONFIG_IA32_EMULATION */
  39         unsigned long extramask[_NSIG_WORDS-1];
  40 #endif /* CONFIG_IA32_EMULATION */
  41         char retcode[8];
  42         /* fp state follows here */
  43 };
  44 
  45 struct rt_sigframe_ia32 {
  46         u32 pretcode;
  47         int sig;
  48         u32 pinfo;
  49         u32 puc;
  50 #ifdef CONFIG_IA32_EMULATION
  51         compat_siginfo_t info;
  52 #else /* !CONFIG_IA32_EMULATION */
  53         struct siginfo info;
  54 #endif /* CONFIG_IA32_EMULATION */
  55         struct ucontext_ia32 uc;
  56         char retcode[8];
  57         /* fp state follows here */
  58 };
  59 #endif /* defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION) */
  60 
  61 #ifdef CONFIG_X86_64
  62 
  63 struct rt_sigframe {
  64         char __user *pretcode;
  65         struct ucontext uc;
  66         struct siginfo info;
  67         /* fp state follows here */
  68 };
  69 
  70 #ifdef CONFIG_X86_X32_ABI
  71 
  72 struct ucontext_x32 {
  73         unsigned int      uc_flags;
  74         unsigned int      uc_link;
  75         compat_stack_t    uc_stack;
  76         unsigned int      uc__pad0;     /* needed for alignment */
  77         struct sigcontext uc_mcontext;  /* the 64-bit sigcontext type */
  78         compat_sigset_t   uc_sigmask;   /* mask last for extensibility */
  79 };
  80 
  81 struct rt_sigframe_x32 {
  82         u64 pretcode;
  83         struct ucontext_x32 uc;
  84         compat_siginfo_t info;
  85         /* fp state follows here */
  86 };
  87 
  88 #endif /* CONFIG_X86_X32_ABI */
  89 
  90 #endif /* CONFIG_X86_64 */
  91 
  92 #endif /* _ASM_X86_SIGFRAME_H */