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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> | |
3 | * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | #ifndef _PARISC64_KERNEL_SIGNAL32_H | |
20 | #define _PARISC64_KERNEL_SIGNAL32_H | |
21 | ||
22 | #include <linux/compat.h> | |
f671c45d KM |
23 | |
24 | typedef compat_uptr_t compat_sighandler_t; | |
25 | ||
26 | typedef struct compat_sigaltstack { | |
27 | compat_uptr_t ss_sp; | |
28 | compat_int_t ss_flags; | |
29 | compat_size_t ss_size; | |
30 | } compat_stack_t; | |
31 | ||
32 | /* Most things should be clean enough to redefine this at will, if care | |
33 | is taken to make libc match. */ | |
34 | ||
35 | struct compat_sigaction { | |
36 | compat_sighandler_t sa_handler; | |
37 | compat_uint_t sa_flags; | |
38 | compat_sigset_t sa_mask; /* mask last for extensibility */ | |
39 | }; | |
40 | ||
41 | /* 32-bit ucontext as seen from an 64-bit kernel */ | |
42 | struct compat_ucontext { | |
43 | compat_uint_t uc_flags; | |
44 | compat_uptr_t uc_link; | |
45 | compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/ | |
46 | /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */ | |
47 | compat_uint_t pad[1]; | |
48 | struct compat_sigcontext uc_mcontext; | |
49 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ | |
50 | }; | |
1da177e4 LT |
51 | |
52 | /* ELF32 signal handling */ | |
53 | ||
54 | struct k_sigaction32 { | |
55 | struct compat_sigaction sa; | |
56 | }; | |
57 | ||
f671c45d KM |
58 | typedef struct compat_siginfo { |
59 | int si_signo; | |
60 | int si_errno; | |
61 | int si_code; | |
62 | ||
63 | union { | |
64 | int _pad[((128/sizeof(int)) - 3)]; | |
65 | ||
66 | /* kill() */ | |
67 | struct { | |
68 | unsigned int _pid; /* sender's pid */ | |
69 | unsigned int _uid; /* sender's uid */ | |
70 | } _kill; | |
71 | ||
72 | /* POSIX.1b timers */ | |
73 | struct { | |
74 | compat_timer_t _tid; /* timer id */ | |
75 | int _overrun; /* overrun count */ | |
76 | char _pad[sizeof(unsigned int) - sizeof(int)]; | |
77 | compat_sigval_t _sigval; /* same as below */ | |
78 | int _sys_private; /* not to be passed to user */ | |
79 | } _timer; | |
80 | ||
81 | /* POSIX.1b signals */ | |
82 | struct { | |
83 | unsigned int _pid; /* sender's pid */ | |
84 | unsigned int _uid; /* sender's uid */ | |
85 | compat_sigval_t _sigval; | |
86 | } _rt; | |
87 | ||
88 | /* SIGCHLD */ | |
89 | struct { | |
90 | unsigned int _pid; /* which child */ | |
91 | unsigned int _uid; /* sender's uid */ | |
92 | int _status; /* exit code */ | |
93 | compat_clock_t _utime; | |
94 | compat_clock_t _stime; | |
95 | } _sigchld; | |
96 | ||
97 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
98 | struct { | |
99 | unsigned int _addr; /* faulting insn/memory ref. */ | |
100 | } _sigfault; | |
101 | ||
102 | /* SIGPOLL */ | |
103 | struct { | |
104 | int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ | |
105 | int _fd; | |
106 | } _sigpoll; | |
107 | } _sifields; | |
108 | } compat_siginfo_t; | |
109 | ||
110 | int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from); | |
111 | int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from); | |
112 | ||
113 | /* In a deft move of uber-hackery, we decide to carry the top half of all | |
114 | * 64-bit registers in a non-portable, non-ABI, hidden structure. | |
115 | * Userspace can read the hidden structure if it *wants* but is never | |
7022672e | 116 | * guaranteed to be in the same place. In fact the uc_sigmask from the |
f671c45d KM |
117 | * ucontext_t structure may push the hidden register file downards |
118 | */ | |
119 | struct compat_regfile { | |
120 | /* Upper half of all the 64-bit registers that were truncated | |
121 | on a copy to a 32-bit userspace */ | |
122 | compat_int_t rf_gr[32]; | |
123 | compat_int_t rf_iasq[2]; | |
124 | compat_int_t rf_iaoq[2]; | |
125 | compat_int_t rf_sar; | |
126 | }; | |
127 | ||
128 | #define COMPAT_SIGRETURN_TRAMP 4 | |
129 | #define COMPAT_SIGRESTARTBLOCK_TRAMP 5 | |
130 | #define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \ | |
131 | COMPAT_SIGRESTARTBLOCK_TRAMP) | |
132 | ||
133 | struct compat_rt_sigframe { | |
134 | /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c | |
135 | Secondary to that it must protect the ERESTART_RESTARTBLOCK | |
136 | trampoline we left on the stack (we were bad and didn't | |
137 | change sp so we could run really fast.) */ | |
138 | compat_uint_t tramp[COMPAT_TRAMP_SIZE]; | |
139 | compat_siginfo_t info; | |
140 | struct compat_ucontext uc; | |
141 | /* Hidden location of truncated registers, *must* be last. */ | |
142 | struct compat_regfile regs; | |
143 | }; | |
144 | ||
145 | /* | |
146 | * The 32-bit ABI wants at least 48 bytes for a function call frame: | |
147 | * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of | |
148 | * which Linux/parisc uses is sp-20 for the saved return pointer...) | |
149 | * Then, the stack pointer must be rounded to a cache line (64 bytes). | |
150 | */ | |
151 | #define SIGFRAME32 64 | |
152 | #define FUNCTIONCALLFRAME32 48 | |
153 | #define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) | |
154 | ||
1da177e4 LT |
155 | void sigset_32to64(sigset_t *s64, compat_sigset_t *s32); |
156 | void sigset_64to32(compat_sigset_t *s32, sigset_t *s64); | |
157 | int do_sigaltstack32 (const compat_stack_t __user *uss32, | |
158 | compat_stack_t __user *uoss32, unsigned long sp); | |
159 | long restore_sigcontext32(struct compat_sigcontext __user *sc, | |
160 | struct compat_regfile __user *rf, | |
161 | struct pt_regs *regs); | |
162 | long setup_sigcontext32(struct compat_sigcontext __user *sc, | |
163 | struct compat_regfile __user *rf, | |
164 | struct pt_regs *regs, int in_syscall); | |
165 | ||
166 | #endif |