xref: /openbmc/linux/arch/x86/include/asm/sigframe.h (revision 5c816641)
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 	unsigned int extramask[1];
37 	char retcode[8];
38 	/* fp state follows here */
39 };
40 
41 struct rt_sigframe_ia32 {
42 	u32 pretcode;
43 	int sig;
44 	u32 pinfo;
45 	u32 puc;
46 #ifdef CONFIG_IA32_EMULATION
47 	compat_siginfo_t info;
48 #else /* !CONFIG_IA32_EMULATION */
49 	struct siginfo info;
50 #endif /* CONFIG_IA32_EMULATION */
51 	struct ucontext_ia32 uc;
52 	char retcode[8];
53 	/* fp state follows here */
54 };
55 #endif /* defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION) */
56 
57 #ifdef CONFIG_X86_64
58 
59 struct rt_sigframe {
60 	char __user *pretcode;
61 	struct ucontext uc;
62 	struct siginfo info;
63 	/* fp state follows here */
64 };
65 
66 #ifdef CONFIG_X86_X32_ABI
67 
68 struct ucontext_x32 {
69 	unsigned int	  uc_flags;
70 	unsigned int 	  uc_link;
71 	compat_stack_t	  uc_stack;
72 	unsigned int	  uc__pad0;     /* needed for alignment */
73 	struct sigcontext uc_mcontext;  /* the 64-bit sigcontext type */
74 	compat_sigset_t	  uc_sigmask;	/* mask last for extensibility */
75 };
76 
77 struct rt_sigframe_x32 {
78 	u64 pretcode;
79 	struct ucontext_x32 uc;
80 	compat_siginfo_t info;
81 	/* fp state follows here */
82 };
83 
84 #endif /* CONFIG_X86_X32_ABI */
85 
86 #endif /* CONFIG_X86_64 */
87 
88 void __init init_sigframe_size(void);
89 
90 #endif /* _ASM_X86_SIGFRAME_H */
91