diff options
Diffstat (limited to 'lib/libc/mips/gen/longjmp.c')
| -rw-r--r-- | lib/libc/mips/gen/longjmp.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib/libc/mips/gen/longjmp.c b/lib/libc/mips/gen/longjmp.c new file mode 100644 index 0000000..7c68470 --- /dev/null +++ b/lib/libc/mips/gen/longjmp.c @@ -0,0 +1,103 @@ +/* $NetBSD: longjmp.c,v 1.1 2005/09/17 11:49:39 tsutsui Exp $ */ + +/*- + * Copyright (c) 2003 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christian Limpach and Matt Thomas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#include "namespace.h" +#include <sys/types.h> +#include <ucontext.h> +#include <signal.h> +#include <stdlib.h> +#include <string.h> + +#include <machine/regnum.h> + +void +__longjmp14(jmp_buf env, int val) +{ + struct sigcontext *sc = (void *)env; + ucontext_t uc; + + /* Ensure non-zero SP and sigcontext magic number is present */ + if (sc->sc_regs[_R_SP] == 0 || sc->sc_regs[_R_ZERO] != 0xACEDBADE) + goto err; + + /* Ensure non-zero return value */ + if (val == 0) + val = 1; + + /* + * Set _UC_{SET,CLR}STACK according to SS_ONSTACK. + * + * Restore the signal mask with sigprocmask() instead of _UC_SIGMASK, + * since libpthread may want to interpose on signal handling. + */ + uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK); + + sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL); + + /* Clear uc_link */ + uc.uc_link = 0; + + /* Save return value in context */ + uc.uc_mcontext.__gregs[_R_V0] = val; + + /* Copy saved registers */ + uc.uc_mcontext.__gregs[_REG_S0] = sc->sc_regs[_R_S0]; + uc.uc_mcontext.__gregs[_REG_S1] = sc->sc_regs[_R_S1]; + uc.uc_mcontext.__gregs[_REG_S2] = sc->sc_regs[_R_S2]; + uc.uc_mcontext.__gregs[_REG_S3] = sc->sc_regs[_R_S3]; + uc.uc_mcontext.__gregs[_REG_S4] = sc->sc_regs[_R_S4]; + uc.uc_mcontext.__gregs[_REG_S5] = sc->sc_regs[_R_S5]; + uc.uc_mcontext.__gregs[_REG_S6] = sc->sc_regs[_R_S6]; + uc.uc_mcontext.__gregs[_REG_S7] = sc->sc_regs[_R_S7]; + uc.uc_mcontext.__gregs[_REG_S8] = sc->sc_regs[_R_S8]; + uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_regs[_R_SP]; + uc.uc_mcontext.__gregs[_REG_RA] = sc->sc_regs[_R_RA]; + uc.uc_mcontext.__gregs[_REG_EPC] = sc->sc_pc; + + /* Copy FP state */ + if (sc->sc_fpused) { + /* FP saved regs are $f20 .. $f31 */ + memcpy(&uc.uc_mcontext.__fpregs.__fp_r.__fp_regs[20], + &sc->sc_fpregs[20], 32 - 20); + uc.uc_mcontext.__fpregs.__fp_csr = + sc->sc_fpregs[_R_FSR - _FPBASE]; + /* XXX sc_fp_control */ + uc.uc_flags |= _UC_FPU; + } + + setcontext(&uc); + err: + longjmperror(); + abort(); + /* NOTREACHED */ +} |
