/* * 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> typedef compat_uptr_t compat_sighandler_t; typedef struct compat_sigaltstack { compat_uptr_t ss_sp; compat_int_t ss_flags; compat_size_t ss_size; } compat_stack_t; /* Most things should be clean enough to redefine this at will, if care is taken to make libc match. */ struct compat_sigaction { compat_sighandler_t sa_handler; compat_uint_t sa_flags; compat_sigset_t sa_mask; /* mask last for extensibility */ }; /* 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 */ struct k_sigaction32 { struct compat_sigaction sa; }; typedef struct compat_siginfo { int si_signo; int si_errno; int si_code; union { int _pad[((128/sizeof(int)) - 3)]; /* kill() */ struct { unsigned int _pid; /* sender's pid */ unsigned int _uid; /* sender's uid */ } _kill; /* POSIX.1b timers */ struct { compat_timer_t _tid; /* timer id */ int _overrun; /* overrun count */ char _pad[sizeof(unsigned int) - sizeof(int)]; compat_sigval_t _sigval; /* same as below */ int _sys_private; /* not to be passed to user */ } _timer; /* POSIX.1b signals */ struct { unsigned int _pid; /* sender's pid */ unsigned int _uid; /* sender's uid */ compat_sigval_t _sigval; } _rt; /* SIGCHLD */ struct { unsigned int _pid; /* which child */ unsigned int _uid; /* sender's uid */ int _status; /* exit code */ compat_clock_t _utime; compat_clock_t _stime; } _sigchld; /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ struct { unsigned int _addr; /* faulting insn/memory ref. */ } _sigfault; /* SIGPOLL */ struct { int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ int _fd; } _sigpoll; } _sifields; } compat_siginfo_t; int copy_siginfo_to_user32 (compat_siginfo_t __user *to, 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); int do_sigaltstack32 (const compat_stack_t __user *uss32, compat_stack_t __user *uoss32, unsigned long sp); 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