1 /* $NetBSD: signal.h,v 1.18 2003/01/20 16:28:13 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)signal.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 #ifndef _MIPS_SIGNAL_H_ 42 #define _MIPS_SIGNAL_H_ 43 44 #include <machine/cdefs.h> /* for API selection */ 45 46 #if !defined(__ASSEMBLER__) 47 48 /* 49 * Machine-dependent signal definitions 50 */ 51 52 typedef int sig_atomic_t; 53 54 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 55 !defined(_XOPEN_SOURCE) 56 /* 57 * Information pushed on stack when a signal is delivered. 58 * This is used by the kernel to restore state following 59 * execution of the signal handler. It is also made available 60 * to the handler to allow it to restore state properly if 61 * a non-standard exit is performed. 62 * 63 * sizeof(sigcontext) = 45 * sizeof(int) + 35 * sizeof(mips_reg_t) 64 */ 65 #if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 66 struct sigcontext13 { 67 int sc_onstack; /* sigstack state to restore */ 68 int sc_mask; /* signal mask to restore (old style) */ 69 mips_reg_t sc_pc; /* pc at time of signal */ 70 mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */ 71 mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */ 72 int sc_fpused; /* fp has been used */ 73 int sc_fpregs[33]; /* fp regs 0 to 31 and csr */ 74 int sc_fpc_eir; /* floating point exception instruction reg */ 75 int sc_xxx[8]; /* XXX reserved */ 76 }; 77 #endif /* __LIBC12_SOURCE__ || _KERNEL */ 78 79 struct sigcontext { 80 int sc_onstack; /* sigstack state to restore */ 81 int __sc_mask13; /* signal mask to restore (old style) */ 82 mips_reg_t sc_pc; /* pc at time of signal */ 83 mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */ 84 mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */ 85 int sc_fpused; /* fp has been used */ 86 int sc_fpregs[33]; /* fp regs 0 to 31 and csr */ 87 int sc_fpc_eir; /* floating point exception instruction reg */ 88 int sc_xxx[8]; /* XXX reserved */ 89 sigset_t sc_mask; /* signal mask to restore (new style) */ 90 }; 91 92 /* 93 * The following macros are used to convert from a ucontext to sigcontext, 94 * and vice-versa. This is for building a sigcontext to deliver to old-style 95 * signal handlers, and converting back (in the event the handler modifies 96 * the context). 97 */ 98 #define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 99 do { \ 100 (sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_EPC]; \ 101 memcpy((sc)->sc_regs, (uc)->uc_mcontext.__gregs, \ 102 sizeof((sc)->sc_regs)); \ 103 (sc)->mullo = (uc)->uc_mcontext.__gregs[_REG_MDLO]; \ 104 (sc)->mulhi = (uc)->uc_mcontext.__gregs[_REG_MDHI]; \ 105 \ 106 if ((uc)->uc_flags & _UC_FPU) { \ 107 memcpy(&(sc)->sc_fpregs, \ 108 &(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \ 109 sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \ 110 (sc)->sc_fpregs[32] = \ 111 (uc)->uc_mcontext.__fpregs.__fp_csr; \ 112 (sc)->sc_fpc_eir = 0; /* XXX */ \ 113 (sc)->sc_fpused = 1; \ 114 } else \ 115 (sc)->sc_fpused = 0; \ 116 } while (/*CONSTCOND*/0) 117 118 #define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 119 do { \ 120 (uc)->uc_mcontext.__gregs[_REG_EPC] = (sc)->sc_pc; \ 121 memcpy((uc)->uc_mcontext.__gregs, (sc)->sc_regs, \ 122 sizeof((sc)->sc_regs)); \ 123 (uc)->uc_mcontext.__gregs[_REG_MDLO] = (sc)->mullo; \ 124 (uc)->uc_mcontext.__gregs[_REG_MDHI] = (sc)->mulhi; \ 125 \ 126 if ((sc)->sc_fpused) { \ 127 memcpy(&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \ 128 &(sc)->sc_fpregs, \ 129 sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \ 130 (uc)->uc_mcontext.__fpregs.__fp_csr = \ 131 (sc)->sc_fpregs[32]; \ 132 (uc)->uc_flags |= _UC_FPU; \ 133 } else \ 134 (uc)->uc_flags &= ~_UC_FPU; \ 135 } while (/*CONSTCOND*/0) 136 137 #endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 138 139 #endif /* !_LANGUAGE_ASSEMBLY */ 140 #if !defined(_KERNEL) 141 /* 142 * Hard code these to make people think twice about breaking compatibility. 143 * These macros are generated independently for the kernel. 144 */ 145 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 146 #define _OFFSETOF_SC_REGS 12 147 #define _OFFSETOF_SC_FPREGS 152 148 #define _OFFSETOF_SC_MASK 320 149 #else 150 #define _OFFSETOF_SC_REGS 16 151 #define _OFFSETOF_SC_FPREGS 292 152 #define _OFFSETOF_SC_MASK 460 153 #endif 154 #endif /* !_KERNEL */ 155 #endif /* !_MIPS_SIGNAL_H_ */ 156