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-rw-r--r--arch/parisc/kernel/signal32.h166
1 files changed, 166 insertions, 0 deletions
diff --git a/arch/parisc/kernel/signal32.h b/arch/parisc/kernel/signal32.h
new file mode 100644
index 00000000000..c7800846422
--- /dev/null
+++ b/arch/parisc/kernel/signal32.h
@@ -0,0 +1,166 @@
+/*
+ * 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