1 /* $NetBSD: mips_fputrap.c,v 1.6 2009/12/14 00:46:06 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2004 5 * Matthias Drochner. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/proc.h> 32 #include <sys/signal.h> 33 #include <sys/siginfo.h> 34 #include <mips/cpuregs.h> 35 #include <mips/regnum.h> 36 37 #ifndef SOFTFLOAT 38 void mips_fpuexcept(struct lwp *, unsigned int); 39 void mips_fpuillinst(struct lwp *, unsigned int, unsigned long); 40 static int fpustat2sicode(unsigned int); 41 42 void 43 mips_fpuexcept(struct lwp *l, unsigned int fpustat) 44 { 45 ksiginfo_t ksi; 46 47 KSI_INIT_TRAP(&ksi); 48 ksi.ksi_signo = SIGFPE; 49 ksi.ksi_code = fpustat2sicode(fpustat); 50 ksi.ksi_trap = fpustat; 51 (*l->l_proc->p_emul->e_trapsignal)(l, &ksi); 52 } 53 54 void 55 mips_fpuillinst(struct lwp *l, unsigned int opcode, unsigned long vaddr) 56 { 57 ksiginfo_t ksi; 58 59 KSI_INIT_TRAP(&ksi); 60 ksi.ksi_signo = SIGILL; 61 ksi.ksi_code = ILL_ILLOPC; 62 ksi.ksi_trap = opcode; 63 ksi.ksi_addr = (void *)vaddr; 64 (*l->l_proc->p_emul->e_trapsignal)(l, &ksi); 65 } 66 67 static struct { 68 unsigned int bit; 69 int code; 70 } fpecodes[] = { 71 { MIPS_FPU_EXCEPTION_UNDERFLOW, FPE_FLTUND }, 72 { MIPS_FPU_EXCEPTION_OVERFLOW, FPE_FLTOVF }, 73 { MIPS_FPU_EXCEPTION_INEXACT, FPE_FLTRES }, 74 { MIPS_FPU_EXCEPTION_DIV0, FPE_FLTDIV }, 75 { MIPS_FPU_EXCEPTION_INVALID, FPE_FLTINV }, 76 { MIPS_FPU_EXCEPTION_UNIMPL, FPE_FLTINV } 77 }; 78 79 static int 80 fpustat2sicode(unsigned int fpustat) 81 { 82 int i; 83 84 for (i = 0; i < 6; i++) 85 if (fpustat & fpecodes[i].bit) 86 return (fpecodes[i].code); 87 return (FPE_FLTINV); 88 } 89 #endif /* !SOFTFLOAT */ 90 91 void fpemul_trapsignal(struct lwp *, unsigned int, unsigned int); 92 93 void 94 fpemul_trapsignal(struct lwp *l, unsigned int sig, unsigned int code) 95 { 96 ksiginfo_t ksi; 97 98 #if DEBUG 99 printf("fpemul_trapsignal(%x,%x,%#"PRIxREGISTER")\n", 100 sig, code, l->l_md.md_regs->f_regs[_R_PC]); 101 #endif 102 103 KSI_INIT_TRAP(&ksi); 104 ksi.ksi_signo = sig; 105 ksi.ksi_code = 1; /* XXX */ 106 ksi.ksi_trap = code; 107 (*l->l_proc->p_emul->e_trapsignal)(l, &ksi); 108 } 109