1 /* $NetBSD: signal.h,v 1.12 2003/04/28 23:16:20 bjh21 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 #include <sys/featuretest.h> 42 43 typedef int sig_atomic_t; 44 45 #if defined(_NETBSD_SOURCE) 46 /* 47 * Get the "code" values 48 */ 49 #include <machine/trap.h> 50 51 /* 52 * Information pushed on stack when a signal is delivered. 53 * This is used by the kernel to restore state following 54 * execution of the signal handler. It is also made available 55 * to the handler to allow it to restore state properly if 56 * a non-standard exit is performed. 57 */ 58 #if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 59 struct sigcontext13 { 60 int sc_onstack; /* sigstack state to restore */ 61 int sc_mask; /* signal mask to restore (old style) */ 62 int sc_sp; /* sp to restore */ 63 int sc_fp; /* fp to restore */ 64 int sc_ap; /* ap to restore */ 65 int sc_pc; /* pc to restore */ 66 int sc_ps; /* psl to restore */ 67 }; 68 #endif /* __LIBC12_SOURCE__ || _KERNEL */ 69 70 struct sigcontext { 71 int sc_onstack; /* sigstack state to restore */ 72 int __sc_mask13; /* signal mask to restore (old style) */ 73 int sc_sp; /* sp to restore */ 74 int sc_fp; /* fp to restore */ 75 int sc_ap; /* ap to restore */ 76 int sc_pc; /* pc to restore */ 77 int sc_ps; /* psl to restore */ 78 sigset_t sc_mask; /* signal mask to restore (new style) */ 79 }; 80 81 /* 82 * The following macros are used to convert from a ucontext to sigcontext, 83 * and vice-versa. This is for building a sigcontext to deliver to old-style 84 * signal handlers, and converting back (in the event the handler modifies 85 * the context). 86 * 87 * On m68k, we also need the sigstate conversion macros below. 88 */ 89 #define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 90 do { \ 91 (sc)->sc_sp = (uc)->uc_mcontext.__gregs[_REG_A7]; \ 92 (sc)->sc_fp = (uc)->uc_mcontext.__gregs[_REG_A6]; \ 93 /* sc_ap points to sigstate */ \ 94 (sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 95 (sc)->sc_ps = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 96 } while (/*CONSTCOND*/0) 97 98 #define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 99 do { \ 100 (uc)->uc_mcontext.__gregs[_REG_A7] = (sc)->sc_sp; \ 101 (uc)->uc_mcontext.__gregs[_REG_A6] = (sc)->sc_fp; \ 102 (uc)->uc_mcontext.__gregs[_REG_PC] = (sc)->sc_pc; \ 103 (uc)->uc_mcontext.__gregs[_REG_PS] = (sc)->sc_ps; \ 104 } while (/*CONSTCOND*/0) 105 106 #if defined(__M68K_SIGNAL_PRIVATE) 107 #include <m68k/frame.h> 108 109 /* 110 * Register state saved while kernel delivers a signal. 111 */ 112 struct sigstate { 113 int ss_flags; /* which of the following are valid */ 114 struct frame ss_frame; /* original exception frame */ 115 struct fpframe ss_fpstate; /* 68881/68882 state info */ 116 }; 117 118 #define SS_RTEFRAME 0x01 119 #define SS_FPSTATE 0x02 120 #define SS_USERREGS 0x04 121 122 #ifdef _KERNEL 123 #define _SIGSTATE_EXFRAMESIZE(fmt) exframesize[(fmt)] 124 #endif 125 126 #define _MCONTEXT_TO_SIGSTATE(uc, ss) \ 127 do { \ 128 (ss)->ss_flags = SS_USERREGS; \ 129 memcpy(&(ss)->ss_frame.f_regs, &(uc)->uc_mcontext.__gregs, \ 130 16 * sizeof(unsigned int)); \ 131 (ss)->ss_frame.f_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 132 (ss)->ss_frame.f_sr = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 133 (ss)->ss_frame.f_pad = 0; \ 134 (ss)->ss_frame.f_stackadj = 0; \ 135 (ss)->ss_frame.f_format = \ 136 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format; \ 137 if ((ss)->ss_frame.f_format >= FMT4) { \ 138 (ss)->ss_flags |= SS_RTEFRAME; \ 139 (ss)->ss_frame.f_vector = \ 140 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector; \ 141 memcpy(&(ss)->ss_frame.F_u, \ 142 &(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 143 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 144 } \ 145 \ 146 (ss)->ss_fpstate.FPF_u1 = \ 147 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1; \ 148 if ((uc)->uc_flags & _UC_FPU) { /* non-null FP frame */ \ 149 (ss)->ss_fpstate.FPF_u2 = \ 150 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2; \ 151 memcpy(&(ss)->ss_fpstate.fpf_regs, \ 152 &(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 153 sizeof((ss)->ss_fpstate.fpf_regs)); \ 154 (ss)->ss_fpstate.fpf_fpcr = \ 155 (uc)->uc_mcontext.__fpregs.__fp_pcr; \ 156 (ss)->ss_fpstate.fpf_fpsr = \ 157 (uc)->uc_mcontext.__fpregs.__fp_psr; \ 158 (ss)->ss_fpstate.fpf_fpiar = \ 159 (uc)->uc_mcontext.__fpregs.__fp_piaddr; \ 160 (ss)->ss_flags |= SS_FPSTATE; \ 161 } \ 162 } while (/*CONSTCOND*/0) 163 164 #define _SIGSTATE_TO_MCONTEXT(ss, uc) \ 165 do { \ 166 memcpy(&(uc)->uc_mcontext.__gregs, &(ss)->ss_frame.f_regs, \ 167 16 * sizeof(unsigned int)); \ 168 (uc)->uc_mcontext.__gregs[_REG_PC] = (ss)->ss_frame.f_pc; \ 169 (uc)->uc_mcontext.__gregs[_REG_PS] = (ss)->ss_frame.f_sr; \ 170 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format = \ 171 (ss)->ss_frame.f_format; \ 172 if ((ss)->ss_flags & SS_RTEFRAME) { \ 173 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector = \ 174 (ss)->ss_frame.f_vector; \ 175 memcpy(&(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 176 &(ss)->ss_frame.F_u, \ 177 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 178 } \ 179 \ 180 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1 = \ 181 (ss)->ss_fpstate.FPF_u1; \ 182 if ((ss)->ss_flags & SS_FPSTATE) { \ 183 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2 = \ 184 (ss)->ss_fpstate.FPF_u2; \ 185 memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 186 &(ss)->ss_fpstate.fpf_regs, \ 187 sizeof((ss)->ss_fpstate.fpf_regs)); \ 188 (uc)->uc_mcontext.__fpregs.__fp_pcr = \ 189 (ss)->ss_fpstate.fpf_fpcr; \ 190 (uc)->uc_mcontext.__fpregs.__fp_psr = \ 191 (ss)->ss_fpstate.fpf_fpsr; \ 192 (uc)->uc_mcontext.__fpregs.__fp_piaddr = \ 193 (ss)->ss_fpstate.fpf_fpiar; \ 194 (uc)->uc_flags |= _UC_FPU; \ 195 } else \ 196 (uc)->uc_flags &= ~_UC_FPU; \ 197 } while (/*CONSTCOND*/0) 198 199 /* 200 * Stack frame layout when delivering a signal. 201 */ 202 struct sigframe { 203 int sf_ra; /* handler return address */ 204 int sf_signum; /* signal number for handler */ 205 int sf_code; /* additional info for handler */ 206 struct sigcontext *sf_scp; /* context pointer for handler */ 207 struct sigcontext sf_sc; /* actual context */ 208 struct sigstate sf_state; /* state of the hardware */ 209 }; 210 #endif /* _KERNEL && __M68K_SIGNAL_PRIVATE */ 211 212 #endif /* _NETBSD_SOURCE */ 213 #endif /* !_M68K_SIGNAL_H_ */ 214