1 /* $NetBSD: signal.h,v 1.11 2003/01/17 23:18:28 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)signal.h 7.16 (Berkeley) 3/17/91 36 */ 37 38 #ifndef _M68K_SIGNAL_H_ 39 #define _M68K_SIGNAL_H_ 40 41 typedef int sig_atomic_t; 42 43 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 44 !defined(_XOPEN_SOURCE) 45 /* 46 * Get the "code" values 47 */ 48 #include <machine/trap.h> 49 50 /* 51 * Information pushed on stack when a signal is delivered. 52 * This is used by the kernel to restore state following 53 * execution of the signal handler. It is also made available 54 * to the handler to allow it to restore state properly if 55 * a non-standard exit is performed. 56 */ 57 #if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 58 struct sigcontext13 { 59 int sc_onstack; /* sigstack state to restore */ 60 int sc_mask; /* signal mask to restore (old style) */ 61 int sc_sp; /* sp to restore */ 62 int sc_fp; /* fp to restore */ 63 int sc_ap; /* ap to restore */ 64 int sc_pc; /* pc to restore */ 65 int sc_ps; /* psl to restore */ 66 }; 67 #endif /* __LIBC12_SOURCE__ || _KERNEL */ 68 69 struct sigcontext { 70 int sc_onstack; /* sigstack state to restore */ 71 int __sc_mask13; /* signal mask to restore (old style) */ 72 int sc_sp; /* sp to restore */ 73 int sc_fp; /* fp to restore */ 74 int sc_ap; /* ap to restore */ 75 int sc_pc; /* pc to restore */ 76 int sc_ps; /* psl to restore */ 77 sigset_t sc_mask; /* signal mask to restore (new style) */ 78 }; 79 80 /* 81 * The following macros are used to convert from a ucontext to sigcontext, 82 * and vice-versa. This is for building a sigcontext to deliver to old-style 83 * signal handlers, and converting back (in the event the handler modifies 84 * the context). 85 * 86 * On m68k, we also need the sigstate conversion macros below. 87 */ 88 #define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 89 do { \ 90 (sc)->sc_sp = (uc)->uc_mcontext.__gregs[_REG_A7]; \ 91 (sc)->sc_fp = (uc)->uc_mcontext.__gregs[_REG_A6]; \ 92 /* sc_ap points to sigstate */ \ 93 (sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 94 (sc)->sc_ps = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 95 } while (/*CONSTCOND*/0) 96 97 #define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 98 do { \ 99 (uc)->uc_mcontext.__gregs[_REG_A7] = (sc)->sc_sp; \ 100 (uc)->uc_mcontext.__gregs[_REG_A6] = (sc)->sc_fp; \ 101 (uc)->uc_mcontext.__gregs[_REG_PC] = (sc)->sc_pc; \ 102 (uc)->uc_mcontext.__gregs[_REG_PS] = (sc)->sc_ps; \ 103 } while (/*CONSTCOND*/0) 104 105 #if defined(__M68K_SIGNAL_PRIVATE) 106 #include <m68k/frame.h> 107 108 /* 109 * Register state saved while kernel delivers a signal. 110 */ 111 struct sigstate { 112 int ss_flags; /* which of the following are valid */ 113 struct frame ss_frame; /* original exception frame */ 114 struct fpframe ss_fpstate; /* 68881/68882 state info */ 115 }; 116 117 #define SS_RTEFRAME 0x01 118 #define SS_FPSTATE 0x02 119 #define SS_USERREGS 0x04 120 121 #ifdef _KERNEL 122 #define _SIGSTATE_EXFRAMESIZE(fmt) exframesize[(fmt)] 123 #endif 124 125 #define _MCONTEXT_TO_SIGSTATE(uc, ss) \ 126 do { \ 127 (ss)->ss_flags = SS_USERREGS; \ 128 memcpy(&(ss)->ss_frame.f_regs, &(uc)->uc_mcontext.__gregs, \ 129 16 * sizeof(unsigned int)); \ 130 (ss)->ss_frame.f_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 131 (ss)->ss_frame.f_sr = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 132 (ss)->ss_frame.f_pad = 0; \ 133 (ss)->ss_frame.f_stackadj = 0; \ 134 (ss)->ss_frame.f_format = \ 135 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format; \ 136 if ((ss)->ss_frame.f_format >= FMT4) { \ 137 (ss)->ss_flags |= SS_RTEFRAME; \ 138 (ss)->ss_frame.f_vector = \ 139 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector; \ 140 memcpy(&(ss)->ss_frame.F_u, \ 141 &(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 142 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 143 } \ 144 \ 145 (ss)->ss_fpstate.FPF_u1 = \ 146 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1; \ 147 if ((uc)->uc_flags & _UC_FPU) { /* non-null FP frame */ \ 148 (ss)->ss_fpstate.FPF_u2 = \ 149 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2; \ 150 memcpy(&(ss)->ss_fpstate.fpf_regs, \ 151 &(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 152 sizeof((ss)->ss_fpstate.fpf_regs)); \ 153 (ss)->ss_fpstate.fpf_fpcr = \ 154 (uc)->uc_mcontext.__fpregs.__fp_pcr; \ 155 (ss)->ss_fpstate.fpf_fpsr = \ 156 (uc)->uc_mcontext.__fpregs.__fp_psr; \ 157 (ss)->ss_fpstate.fpf_fpiar = \ 158 (uc)->uc_mcontext.__fpregs.__fp_piaddr; \ 159 (ss)->ss_flags |= SS_FPSTATE; \ 160 } \ 161 } while (/*CONSTCOND*/0) 162 163 #define _SIGSTATE_TO_MCONTEXT(ss, uc) \ 164 do { \ 165 memcpy(&(uc)->uc_mcontext.__gregs, &(ss)->ss_frame.f_regs, \ 166 16 * sizeof(unsigned int)); \ 167 (uc)->uc_mcontext.__gregs[_REG_PC] = (ss)->ss_frame.f_pc; \ 168 (uc)->uc_mcontext.__gregs[_REG_PS] = (ss)->ss_frame.f_sr; \ 169 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format = \ 170 (ss)->ss_frame.f_format; \ 171 if ((ss)->ss_flags & SS_RTEFRAME) { \ 172 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector = \ 173 (ss)->ss_frame.f_vector; \ 174 memcpy(&(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 175 &(ss)->ss_frame.F_u, \ 176 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 177 } \ 178 \ 179 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1 = \ 180 (ss)->ss_fpstate.FPF_u1; \ 181 if ((ss)->ss_flags & SS_FPSTATE) { \ 182 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2 = \ 183 (ss)->ss_fpstate.FPF_u2; \ 184 memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 185 &(ss)->ss_fpstate.fpf_regs, \ 186 sizeof((ss)->ss_fpstate.fpf_regs)); \ 187 (uc)->uc_mcontext.__fpregs.__fp_pcr = \ 188 (ss)->ss_fpstate.fpf_fpcr; \ 189 (uc)->uc_mcontext.__fpregs.__fp_psr = \ 190 (ss)->ss_fpstate.fpf_fpsr; \ 191 (uc)->uc_mcontext.__fpregs.__fp_piaddr = \ 192 (ss)->ss_fpstate.fpf_fpiar; \ 193 (uc)->uc_flags |= _UC_FPU; \ 194 } else \ 195 (uc)->uc_flags &= ~_UC_FPU; \ 196 } while (/*CONSTCOND*/0) 197 198 /* 199 * Stack frame layout when delivering a signal. 200 */ 201 struct sigframe { 202 int sf_ra; /* handler return address */ 203 int sf_signum; /* signal number for handler */ 204 int sf_code; /* additional info for handler */ 205 struct sigcontext *sf_scp; /* context pointer for handler */ 206 struct sigcontext sf_sc; /* actual context */ 207 struct sigstate sf_state; /* state of the hardware */ 208 }; 209 #endif /* _KERNEL && __M68K_SIGNAL_PRIVATE */ 210 211 #endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 212 #endif /* !_M68K_SIGNAL_H_ */ 213