signal.h revision 1.13
1 /* $NetBSD: signal.h,v 1.13 2003/08/07 16:28:15 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)signal.h 7.16 (Berkeley) 3/17/91 32 */ 33 34 #ifndef _M68K_SIGNAL_H_ 35 #define _M68K_SIGNAL_H_ 36 37 #include <sys/featuretest.h> 38 39 typedef int sig_atomic_t; 40 41 #if defined(_NETBSD_SOURCE) 42 /* 43 * Get the "code" values 44 */ 45 #include <machine/trap.h> 46 47 /* 48 * Information pushed on stack when a signal is delivered. 49 * This is used by the kernel to restore state following 50 * execution of the signal handler. It is also made available 51 * to the handler to allow it to restore state properly if 52 * a non-standard exit is performed. 53 */ 54 #if defined(__LIBC12_SOURCE__) || defined(_KERNEL) 55 struct sigcontext13 { 56 int sc_onstack; /* sigstack state to restore */ 57 int sc_mask; /* signal mask to restore (old style) */ 58 int sc_sp; /* sp to restore */ 59 int sc_fp; /* fp to restore */ 60 int sc_ap; /* ap to restore */ 61 int sc_pc; /* pc to restore */ 62 int sc_ps; /* psl to restore */ 63 }; 64 #endif /* __LIBC12_SOURCE__ || _KERNEL */ 65 66 struct sigcontext { 67 int sc_onstack; /* sigstack state to restore */ 68 int __sc_mask13; /* signal mask to restore (old style) */ 69 int sc_sp; /* sp to restore */ 70 int sc_fp; /* fp to restore */ 71 int sc_ap; /* ap to restore */ 72 int sc_pc; /* pc to restore */ 73 int sc_ps; /* psl to restore */ 74 sigset_t sc_mask; /* signal mask to restore (new style) */ 75 }; 76 77 /* 78 * The following macros are used to convert from a ucontext to sigcontext, 79 * and vice-versa. This is for building a sigcontext to deliver to old-style 80 * signal handlers, and converting back (in the event the handler modifies 81 * the context). 82 * 83 * On m68k, we also need the sigstate conversion macros below. 84 */ 85 #define _MCONTEXT_TO_SIGCONTEXT(uc, sc) \ 86 do { \ 87 (sc)->sc_sp = (uc)->uc_mcontext.__gregs[_REG_A7]; \ 88 (sc)->sc_fp = (uc)->uc_mcontext.__gregs[_REG_A6]; \ 89 /* sc_ap points to sigstate */ \ 90 (sc)->sc_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 91 (sc)->sc_ps = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 92 } while (/*CONSTCOND*/0) 93 94 #define _SIGCONTEXT_TO_MCONTEXT(sc, uc) \ 95 do { \ 96 (uc)->uc_mcontext.__gregs[_REG_A7] = (sc)->sc_sp; \ 97 (uc)->uc_mcontext.__gregs[_REG_A6] = (sc)->sc_fp; \ 98 (uc)->uc_mcontext.__gregs[_REG_PC] = (sc)->sc_pc; \ 99 (uc)->uc_mcontext.__gregs[_REG_PS] = (sc)->sc_ps; \ 100 } while (/*CONSTCOND*/0) 101 102 #if defined(__M68K_SIGNAL_PRIVATE) 103 #include <m68k/frame.h> 104 105 /* 106 * Register state saved while kernel delivers a signal. 107 */ 108 struct sigstate { 109 int ss_flags; /* which of the following are valid */ 110 struct frame ss_frame; /* original exception frame */ 111 struct fpframe ss_fpstate; /* 68881/68882 state info */ 112 }; 113 114 #define SS_RTEFRAME 0x01 115 #define SS_FPSTATE 0x02 116 #define SS_USERREGS 0x04 117 118 #ifdef _KERNEL 119 #define _SIGSTATE_EXFRAMESIZE(fmt) exframesize[(fmt)] 120 #endif 121 122 #define _MCONTEXT_TO_SIGSTATE(uc, ss) \ 123 do { \ 124 (ss)->ss_flags = SS_USERREGS; \ 125 memcpy(&(ss)->ss_frame.f_regs, &(uc)->uc_mcontext.__gregs, \ 126 16 * sizeof(unsigned int)); \ 127 (ss)->ss_frame.f_pc = (uc)->uc_mcontext.__gregs[_REG_PC]; \ 128 (ss)->ss_frame.f_sr = (uc)->uc_mcontext.__gregs[_REG_PS]; \ 129 (ss)->ss_frame.f_pad = 0; \ 130 (ss)->ss_frame.f_stackadj = 0; \ 131 (ss)->ss_frame.f_format = \ 132 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format; \ 133 if ((ss)->ss_frame.f_format >= FMT4) { \ 134 (ss)->ss_flags |= SS_RTEFRAME; \ 135 (ss)->ss_frame.f_vector = \ 136 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector; \ 137 memcpy(&(ss)->ss_frame.F_u, \ 138 &(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 139 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 140 } \ 141 \ 142 (ss)->ss_fpstate.FPF_u1 = \ 143 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1; \ 144 if ((uc)->uc_flags & _UC_FPU) { /* non-null FP frame */ \ 145 (ss)->ss_fpstate.FPF_u2 = \ 146 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2; \ 147 memcpy(&(ss)->ss_fpstate.fpf_regs, \ 148 &(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 149 sizeof((ss)->ss_fpstate.fpf_regs)); \ 150 (ss)->ss_fpstate.fpf_fpcr = \ 151 (uc)->uc_mcontext.__fpregs.__fp_pcr; \ 152 (ss)->ss_fpstate.fpf_fpsr = \ 153 (uc)->uc_mcontext.__fpregs.__fp_psr; \ 154 (ss)->ss_fpstate.fpf_fpiar = \ 155 (uc)->uc_mcontext.__fpregs.__fp_piaddr; \ 156 (ss)->ss_flags |= SS_FPSTATE; \ 157 } \ 158 } while (/*CONSTCOND*/0) 159 160 #define _SIGSTATE_TO_MCONTEXT(ss, uc) \ 161 do { \ 162 memcpy(&(uc)->uc_mcontext.__gregs, &(ss)->ss_frame.f_regs, \ 163 16 * sizeof(unsigned int)); \ 164 (uc)->uc_mcontext.__gregs[_REG_PC] = (ss)->ss_frame.f_pc; \ 165 (uc)->uc_mcontext.__gregs[_REG_PS] = (ss)->ss_frame.f_sr; \ 166 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_format = \ 167 (ss)->ss_frame.f_format; \ 168 if ((ss)->ss_flags & SS_RTEFRAME) { \ 169 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_vector = \ 170 (ss)->ss_frame.f_vector; \ 171 memcpy(&(uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_exframe,\ 172 &(ss)->ss_frame.F_u, \ 173 _SIGSTATE_EXFRAMESIZE((ss)->ss_frame.f_format)); \ 174 } \ 175 \ 176 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u1 = \ 177 (ss)->ss_fpstate.FPF_u1; \ 178 if ((ss)->ss_flags & SS_FPSTATE) { \ 179 (uc)->uc_mcontext.__mc_pad.__mc_frame.__mcf_fpf_u2 = \ 180 (ss)->ss_fpstate.FPF_u2; \ 181 memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fpregs, \ 182 &(ss)->ss_fpstate.fpf_regs, \ 183 sizeof((ss)->ss_fpstate.fpf_regs)); \ 184 (uc)->uc_mcontext.__fpregs.__fp_pcr = \ 185 (ss)->ss_fpstate.fpf_fpcr; \ 186 (uc)->uc_mcontext.__fpregs.__fp_psr = \ 187 (ss)->ss_fpstate.fpf_fpsr; \ 188 (uc)->uc_mcontext.__fpregs.__fp_piaddr = \ 189 (ss)->ss_fpstate.fpf_fpiar; \ 190 (uc)->uc_flags |= _UC_FPU; \ 191 } else \ 192 (uc)->uc_flags &= ~_UC_FPU; \ 193 } while (/*CONSTCOND*/0) 194 195 /* 196 * Stack frame layout when delivering a signal. 197 */ 198 struct sigframe { 199 int sf_ra; /* handler return address */ 200 int sf_signum; /* signal number for handler */ 201 int sf_code; /* additional info for handler */ 202 struct sigcontext *sf_scp; /* context pointer for handler */ 203 struct sigcontext sf_sc; /* actual context */ 204 struct sigstate sf_state; /* state of the hardware */ 205 }; 206 #endif /* _KERNEL && __M68K_SIGNAL_PRIVATE */ 207 208 #endif /* _NETBSD_SOURCE */ 209 #endif /* !_M68K_SIGNAL_H_ */ 210
Indexes created Sun Oct 12 20:09:57 GMT 2025