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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
39#define COMPAT_SIGRETURN_TRAMP 4
40#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
41#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
42 COMPAT_SIGRESTARTBLOCK_TRAMP)
43
44struct compat_rt_sigframe {
45 /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
46 Secondary to that it must protect the ERESTART_RESTARTBLOCK
47 trampoline we left on the stack (we were bad and didn't
48 change sp so we could run really fast.) */
49 compat_uint_t tramp[COMPAT_TRAMP_SIZE];
50 compat_siginfo_t info;
51 struct compat_ucontext uc;
52 /* Hidden location of truncated registers, *must* be last. */
53 struct compat_regfile regs;
54};
55
56/*
57 * The 32-bit ABI wants at least 48 bytes for a function call frame:
58 * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
59 * which Linux/parisc uses is sp-20 for the saved return pointer...)
60 * Then, the stack pointer must be rounded to a cache line (64 bytes).
61 */
62#define SIGFRAME32 64
63#define FUNCTIONCALLFRAME32 48
64#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
65
66long restore_sigcontext32(struct compat_sigcontext __user *sc,
67 struct compat_regfile __user *rf,
68 struct pt_regs *regs);
69long setup_sigcontext32(struct compat_sigcontext __user *sc,
70 struct compat_regfile __user *rf,
71 struct pt_regs *regs, int in_syscall);
72
73#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
24/* 32-bit ucontext as seen from an 64-bit kernel */
25struct compat_ucontext {
26 compat_uint_t uc_flags;
27 compat_uptr_t uc_link;
28 compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
29 /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
30 compat_uint_t pad[1];
31 struct compat_sigcontext uc_mcontext;
32 compat_sigset_t uc_sigmask; /* mask last for extensibility */
33};
34
35/* ELF32 signal handling */
36
37/* In a deft move of uber-hackery, we decide to carry the top half of all
38 * 64-bit registers in a non-portable, non-ABI, hidden structure.
39 * Userspace can read the hidden structure if it *wants* but is never
40 * guaranteed to be in the same place. In fact the uc_sigmask from the
41 * ucontext_t structure may push the hidden register file downards
42 */
43struct compat_regfile {
44 /* Upper half of all the 64-bit registers that were truncated
45 on a copy to a 32-bit userspace */
46 compat_int_t rf_gr[32];
47 compat_int_t rf_iasq[2];
48 compat_int_t rf_iaoq[2];
49 compat_int_t rf_sar;
50};
51
52#define COMPAT_SIGRETURN_TRAMP 4
53#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
54#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
55 COMPAT_SIGRESTARTBLOCK_TRAMP)
56
57struct compat_rt_sigframe {
58 /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
59 Secondary to that it must protect the ERESTART_RESTARTBLOCK
60 trampoline we left on the stack (we were bad and didn't
61 change sp so we could run really fast.) */
62 compat_uint_t tramp[COMPAT_TRAMP_SIZE];
63 compat_siginfo_t info;
64 struct compat_ucontext uc;
65 /* Hidden location of truncated registers, *must* be last. */
66 struct compat_regfile regs;
67};
68
69/*
70 * The 32-bit ABI wants at least 48 bytes for a function call frame:
71 * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
72 * which Linux/parisc uses is sp-20 for the saved return pointer...)
73 * Then, the stack pointer must be rounded to a cache line (64 bytes).
74 */
75#define SIGFRAME32 64
76#define FUNCTIONCALLFRAME32 48
77#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
78
79long restore_sigcontext32(struct compat_sigcontext __user *sc,
80 struct compat_regfile __user *rf,
81 struct pt_regs *regs);
82long setup_sigcontext32(struct compat_sigcontext __user *sc,
83 struct compat_regfile __user *rf,
84 struct pt_regs *regs, int in_syscall);
85
86#endif