mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 06:41:43 +00:00
92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org>
|
|
* Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#ifndef _PARISC64_KERNEL_SIGNAL32_H
|
|
#define _PARISC64_KERNEL_SIGNAL32_H
|
|
|
|
#include <linux/compat.h>
|
|
|
|
/* 32-bit ucontext as seen from an 64-bit kernel */
|
|
struct compat_ucontext {
|
|
compat_uint_t uc_flags;
|
|
compat_uptr_t uc_link;
|
|
compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
|
|
/* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
|
|
compat_uint_t pad[1];
|
|
struct compat_sigcontext uc_mcontext;
|
|
compat_sigset_t uc_sigmask; /* mask last for extensibility */
|
|
};
|
|
|
|
/* ELF32 signal handling */
|
|
|
|
int copy_siginfo_to_user32 (compat_siginfo_t __user *to, const siginfo_t *from);
|
|
int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
|
|
|
|
/* In a deft move of uber-hackery, we decide to carry the top half of all
|
|
* 64-bit registers in a non-portable, non-ABI, hidden structure.
|
|
* Userspace can read the hidden structure if it *wants* but is never
|
|
* guaranteed to be in the same place. In fact the uc_sigmask from the
|
|
* ucontext_t structure may push the hidden register file downards
|
|
*/
|
|
struct compat_regfile {
|
|
/* Upper half of all the 64-bit registers that were truncated
|
|
on a copy to a 32-bit userspace */
|
|
compat_int_t rf_gr[32];
|
|
compat_int_t rf_iasq[2];
|
|
compat_int_t rf_iaoq[2];
|
|
compat_int_t rf_sar;
|
|
};
|
|
|
|
#define COMPAT_SIGRETURN_TRAMP 4
|
|
#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
|
|
#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
|
|
COMPAT_SIGRESTARTBLOCK_TRAMP)
|
|
|
|
struct compat_rt_sigframe {
|
|
/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
|
|
Secondary to that it must protect the ERESTART_RESTARTBLOCK
|
|
trampoline we left on the stack (we were bad and didn't
|
|
change sp so we could run really fast.) */
|
|
compat_uint_t tramp[COMPAT_TRAMP_SIZE];
|
|
compat_siginfo_t info;
|
|
struct compat_ucontext uc;
|
|
/* Hidden location of truncated registers, *must* be last. */
|
|
struct compat_regfile regs;
|
|
};
|
|
|
|
/*
|
|
* The 32-bit ABI wants at least 48 bytes for a function call frame:
|
|
* 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
|
|
* which Linux/parisc uses is sp-20 for the saved return pointer...)
|
|
* Then, the stack pointer must be rounded to a cache line (64 bytes).
|
|
*/
|
|
#define SIGFRAME32 64
|
|
#define FUNCTIONCALLFRAME32 48
|
|
#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
|
|
|
|
void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
|
|
void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
|
|
long restore_sigcontext32(struct compat_sigcontext __user *sc,
|
|
struct compat_regfile __user *rf,
|
|
struct pt_regs *regs);
|
|
long setup_sigcontext32(struct compat_sigcontext __user *sc,
|
|
struct compat_regfile __user *rf,
|
|
struct pt_regs *regs, int in_syscall);
|
|
|
|
#endif
|