1 /* $NetBSD: signal.h,v 1.20 2003/08/07 16:28:29 agc 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)signal.h 8.1 (Berkeley) 6/10/93 35 */ 36 37 #ifndef _MIPS_SIGNAL_H_ 38 #define _MIPS_SIGNAL_H_ 39 40 #include <sys/featuretest.h> 41 42 #include <machine/cdefs.h> /* for API selection */ 43 44 #if !defined(__ASSEMBLER__) 45 46 /* 47 * Machine-dependent signal definitions 48 */ 49 50 typedef int sig_atomic_t; 51 52 #if defined(_NETBSD_SOURCE) 53 /* 54 * Information pushed on stack when a signal is delivered. 55 * This is used by the kernel to restore state following 56 * execution of the signal handler. It is also made available 57 * to the handler to allow it to restore state properly if 58 * a non-standard exit is performed. 59 * 60 * sizeof(sigcontext) = 45 * sizeof(int) + 35 * sizeof(mips_reg_t) 61 */ 62 #if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 63 struct sigcontext13 { 64 int sc_onstack; /* sigstack state to restore */ 65 int sc_mask; /* signal mask to restore (old style) */ 66 mips_reg_t sc_pc; /* pc at time of signal */ 67 mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */ 68 mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */ 69 int sc_fpused; /* fp has been used */ 70 int sc_fpregs[33]; /* fp regs 0 to 31 and csr */ 71 int sc_fpc_eir; /* floating point exception instruction reg */ 72 int sc_xxx[8]; /* XXX reserved */ 73 }; 74 #endif /* __LIBC12_SOURCE__ || _KERNEL */ 75 76 struct sigcontext { 77 int sc_onstack; /* sigstack state to restore */ 78 int __sc_mask13; /* signal mask to restore (old style) */ 79 mips_reg_t sc_pc; /* pc at time of signal */ 80 mips_reg_t sc_regs[32]; /* processor regs 0 to 31 */ 81 mips_reg_t mullo, mulhi;/* mullo and mulhi registers... */ 82 int sc_fpused; /* fp has been used */ 83 int sc_fpregs[33]; /* fp regs 0 to 31 and csr */ 84 int sc_fpc_eir; /* floating point exception instruction reg */ 85 int sc_xxx[8]; /* XXX reserved */ 86 sigset_t sc_mask; /* signal mask to restore (new style) */ 87 }; 88 89 /* 90 * The following macros are used to convert from a ucontext to sigcontext, 91 * and vice-versa. This is for building a sigcontext to deliver to old-style 92 * signal handlers, and converting back (in the event the handler modifies 93 * the context). 94 */ 95 #define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 96 do { \ 97 (sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_EPC]; \ 98 memcpy((sc)->sc_regs, (uc)->uc_mcontext.__gregs, \ 99 sizeof((sc)->sc_regs)); \ 100 (sc)->mullo = (uc)->uc_mcontext.__gregs[_REG_MDLO]; \ 101 (sc)->mulhi = (uc)->uc_mcontext.__gregs[_REG_MDHI]; \ 102 \ 103 if ((uc)->uc_flags & _UC_FPU) { \ 104 memcpy(&(sc)->sc_fpregs, \ 105 &(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \ 106 sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \ 107 (sc)->sc_fpregs[32] = \ 108 (uc)->uc_mcontext.__fpregs.__fp_csr; \ 109 (sc)->sc_fpc_eir = 0; /* XXX */ \ 110 (sc)->sc_fpused = 1; \ 111 } else \ 112 (sc)->sc_fpused = 0; \ 113 } while (/*CONSTCOND*/0) 114 115 #define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 116 do { \ 117 (uc)->uc_mcontext.__gregs[_REG_EPC] = (sc)->sc_pc; \ 118 memcpy((uc)->uc_mcontext.__gregs, (sc)->sc_regs, \ 119 sizeof((sc)->sc_regs)); \ 120 (uc)->uc_mcontext.__gregs[_REG_MDLO] = (sc)->mullo; \ 121 (uc)->uc_mcontext.__gregs[_REG_MDHI] = (sc)->mulhi; \ 122 \ 123 if ((sc)->sc_fpused) { \ 124 memcpy(&(uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32, \ 125 &(sc)->sc_fpregs, \ 126 sizeof((uc)->uc_mcontext.__fpregs.__fp_r.__fp_regs32)); \ 127 (uc)->uc_mcontext.__fpregs.__fp_csr = \ 128 (sc)->sc_fpregs[32]; \ 129 (uc)->uc_flags |= _UC_FPU; \ 130 } else \ 131 (uc)->uc_flags &= ~_UC_FPU; \ 132 } while (/*CONSTCOND*/0) 133 134 #endif /* _NETBSD_SOURCE */ 135 136 #endif /* !_LANGUAGE_ASSEMBLY */ 137 #if !defined(_KERNEL) 138 /* 139 * Hard code these to make people think twice about breaking compatibility. 140 * These macros are generated independently for the kernel. 141 */ 142 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 143 #define _OFFSETOF_SC_REGS 12 144 #define _OFFSETOF_SC_FPREGS 152 145 #define _OFFSETOF_SC_MASK 320 146 #else 147 #define _OFFSETOF_SC_REGS 16 148 #define _OFFSETOF_SC_FPREGS 292 149 #define _OFFSETOF_SC_MASK 460 150 #endif 151 #endif /* !_KERNEL */ 152 #endif /* !_MIPS_SIGNAL_H_ */ 153