167 lines
6.2 KiB
C
167 lines
6.2 KiB
C
/*
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* Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org>
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* Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _PARISC64_KERNEL_SIGNAL32_H
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#define _PARISC64_KERNEL_SIGNAL32_H
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#include <linux/compat.h>
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typedef compat_uptr_t compat_sighandler_t;
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typedef struct compat_sigaltstack {
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compat_uptr_t ss_sp;
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compat_int_t ss_flags;
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compat_size_t ss_size;
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} compat_stack_t;
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/* Most things should be clean enough to redefine this at will, if care
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is taken to make libc match. */
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struct compat_sigaction {
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compat_sighandler_t sa_handler;
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compat_uint_t sa_flags;
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compat_sigset_t sa_mask; /* mask last for extensibility */
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};
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/* 32-bit ucontext as seen from an 64-bit kernel */
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struct compat_ucontext {
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compat_uint_t uc_flags;
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compat_uptr_t uc_link;
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compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
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/* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
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compat_uint_t pad[1];
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struct compat_sigcontext uc_mcontext;
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compat_sigset_t uc_sigmask; /* mask last for extensibility */
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};
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/* ELF32 signal handling */
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struct k_sigaction32 {
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struct compat_sigaction sa;
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};
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typedef struct compat_siginfo {
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int si_signo;
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int si_errno;
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int si_code;
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union {
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int _pad[((128/sizeof(int)) - 3)];
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/* kill() */
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struct {
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unsigned int _pid; /* sender's pid */
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unsigned int _uid; /* sender's uid */
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} _kill;
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/* POSIX.1b timers */
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struct {
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compat_timer_t _tid; /* timer id */
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int _overrun; /* overrun count */
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char _pad[sizeof(unsigned int) - sizeof(int)];
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compat_sigval_t _sigval; /* same as below */
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int _sys_private; /* not to be passed to user */
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} _timer;
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/* POSIX.1b signals */
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struct {
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unsigned int _pid; /* sender's pid */
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unsigned int _uid; /* sender's uid */
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compat_sigval_t _sigval;
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} _rt;
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/* SIGCHLD */
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struct {
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unsigned int _pid; /* which child */
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unsigned int _uid; /* sender's uid */
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int _status; /* exit code */
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compat_clock_t _utime;
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compat_clock_t _stime;
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} _sigchld;
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/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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struct {
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unsigned int _addr; /* faulting insn/memory ref. */
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} _sigfault;
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/* SIGPOLL */
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struct {
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int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
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int _fd;
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} _sigpoll;
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} _sifields;
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} compat_siginfo_t;
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int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
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int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
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/* In a deft move of uber-hackery, we decide to carry the top half of all
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* 64-bit registers in a non-portable, non-ABI, hidden structure.
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* Userspace can read the hidden structure if it *wants* but is never
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* guaranteed to be in the same place. Infact the uc_sigmask from the
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* ucontext_t structure may push the hidden register file downards
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*/
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struct compat_regfile {
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/* Upper half of all the 64-bit registers that were truncated
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on a copy to a 32-bit userspace */
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compat_int_t rf_gr[32];
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compat_int_t rf_iasq[2];
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compat_int_t rf_iaoq[2];
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compat_int_t rf_sar;
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};
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#define COMPAT_SIGRETURN_TRAMP 4
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#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
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#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
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COMPAT_SIGRESTARTBLOCK_TRAMP)
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struct compat_rt_sigframe {
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/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
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Secondary to that it must protect the ERESTART_RESTARTBLOCK
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trampoline we left on the stack (we were bad and didn't
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change sp so we could run really fast.) */
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compat_uint_t tramp[COMPAT_TRAMP_SIZE];
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compat_siginfo_t info;
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struct compat_ucontext uc;
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/* Hidden location of truncated registers, *must* be last. */
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struct compat_regfile regs;
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};
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/*
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* The 32-bit ABI wants at least 48 bytes for a function call frame:
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* 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
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* which Linux/parisc uses is sp-20 for the saved return pointer...)
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* Then, the stack pointer must be rounded to a cache line (64 bytes).
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*/
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#define SIGFRAME32 64
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#define FUNCTIONCALLFRAME32 48
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#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
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void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
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void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
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int do_sigaltstack32 (const compat_stack_t __user *uss32,
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compat_stack_t __user *uoss32, unsigned long sp);
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long restore_sigcontext32(struct compat_sigcontext __user *sc,
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struct compat_regfile __user *rf,
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struct pt_regs *regs);
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long setup_sigcontext32(struct compat_sigcontext __user *sc,
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struct compat_regfile __user *rf,
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struct pt_regs *regs, int in_syscall);
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#endif
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