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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org>
4 * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org>
5 */
6#ifndef _PARISC64_KERNEL_SIGNAL32_H
7#define _PARISC64_KERNEL_SIGNAL32_H
8
9#include <linux/compat.h>
10
11/* 32-bit ucontext as seen from an 64-bit kernel */
12struct compat_ucontext {
13 compat_uint_t uc_flags;
14 compat_uptr_t uc_link;
15 compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
16 /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
17 compat_uint_t pad[1];
18 struct compat_sigcontext uc_mcontext;
19 compat_sigset_t uc_sigmask; /* mask last for extensibility */
20};
21
22/* ELF32 signal handling */
23
24/* In a deft move of uber-hackery, we decide to carry the top half of all
25 * 64-bit registers in a non-portable, non-ABI, hidden structure.
26 * Userspace can read the hidden structure if it *wants* but is never
27 * guaranteed to be in the same place. In fact the uc_sigmask from the
28 * ucontext_t structure may push the hidden register file downards
29 */
30struct compat_regfile {
31 /* Upper half of all the 64-bit registers that were truncated
32 on a copy to a 32-bit userspace */
33 compat_int_t rf_gr[32];
34 compat_int_t rf_iasq[2];
35 compat_int_t rf_iaoq[2];
36 compat_int_t rf_sar;
37};
38
39struct compat_rt_sigframe {
40 unsigned int tramp[2]; /* holds original return address */
41 compat_siginfo_t info;
42 struct compat_ucontext uc;
43 /* Hidden location of truncated registers, *must* be last. */
44 struct compat_regfile regs;
45};
46
47/*
48 * The 32-bit ABI wants at least 48 bytes for a function call frame:
49 * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
50 * which Linux/parisc uses is sp-20 for the saved return pointer...)
51 * Then, the stack pointer must be rounded to a cache line (64 bytes).
52 */
53#define SIGFRAME32 64
54#define FUNCTIONCALLFRAME32 48
55#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
56
57long restore_sigcontext32(struct compat_sigcontext __user *sc,
58 struct compat_regfile __user *rf,
59 struct pt_regs *regs);
60long setup_sigcontext32(struct compat_sigcontext __user *sc,
61 struct compat_regfile __user *rf,
62 struct pt_regs *regs, int in_syscall);
63
64#endif
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>
23
24typedef compat_uptr_t compat_sighandler_t;
25
26typedef 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
35struct 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 */
42struct 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};
51
52/* ELF32 signal handling */
53
54struct k_sigaction32 {
55 struct compat_sigaction sa;
56};
57
58typedef 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
110int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
111int 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
116 * guaranteed to be in the same place. In fact the uc_sigmask from the
117 * ucontext_t structure may push the hidden register file downards
118 */
119struct 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
133struct 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
155void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
156void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
157int do_sigaltstack32 (const compat_stack_t __user *uss32,
158 compat_stack_t __user *uoss32, unsigned long sp);
159long restore_sigcontext32(struct compat_sigcontext __user *sc,
160 struct compat_regfile __user *rf,
161 struct pt_regs *regs);
162long setup_sigcontext32(struct compat_sigcontext __user *sc,
163 struct compat_regfile __user *rf,
164 struct pt_regs *regs, int in_syscall);
165
166#endif