compat_13_machdep.c revision 1.10.2.2
1 1.10.2.2 nathanw /* $NetBSD: compat_13_machdep.c,v 1.10.2.2 2001/08/30 23:43:39 nathanw Exp $ */ 2 1.10.2.2 nathanw 3 1.10.2.2 nathanw /* 4 1.10.2.2 nathanw * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 5 1.10.2.2 nathanw * All rights reserved. 6 1.10.2.2 nathanw * 7 1.10.2.2 nathanw * Author: Chris G. Demetriou 8 1.10.2.2 nathanw * 9 1.10.2.2 nathanw * Permission to use, copy, modify and distribute this software and 10 1.10.2.2 nathanw * its documentation is hereby granted, provided that both the copyright 11 1.10.2.2 nathanw * notice and this permission notice appear in all copies of the 12 1.10.2.2 nathanw * software, derivative works or modified versions, and any portions 13 1.10.2.2 nathanw * thereof, and that both notices appear in supporting documentation. 14 1.10.2.2 nathanw * 15 1.10.2.2 nathanw * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 1.10.2.2 nathanw * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 1.10.2.2 nathanw * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 1.10.2.2 nathanw * 19 1.10.2.2 nathanw * Carnegie Mellon requests users of this software to return to 20 1.10.2.2 nathanw * 21 1.10.2.2 nathanw * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 1.10.2.2 nathanw * School of Computer Science 23 1.10.2.2 nathanw * Carnegie Mellon University 24 1.10.2.2 nathanw * Pittsburgh PA 15213-3890 25 1.10.2.2 nathanw * 26 1.10.2.2 nathanw * any improvements or extensions that they make and grant Carnegie the 27 1.10.2.2 nathanw * rights to redistribute these changes. 28 1.10.2.2 nathanw */ 29 1.10.2.2 nathanw 30 1.10.2.2 nathanw #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 1.10.2.2 nathanw 32 1.10.2.2 nathanw __KERNEL_RCSID(0, "$NetBSD: compat_13_machdep.c,v 1.10.2.2 2001/08/30 23:43:39 nathanw Exp $"); 33 1.10.2.2 nathanw 34 1.10.2.2 nathanw #include <sys/param.h> 35 1.10.2.2 nathanw #include <sys/systm.h> 36 1.10.2.2 nathanw #include <sys/signalvar.h> 37 1.10.2.2 nathanw #include <sys/kernel.h> 38 1.10.2.2 nathanw #include <sys/lwp.h> 39 1.10.2.2 nathanw #include <sys/proc.h> 40 1.10.2.2 nathanw #include <sys/user.h> 41 1.10.2.2 nathanw #include <sys/mount.h> 42 1.10.2.2 nathanw #include <sys/syscallargs.h> 43 1.10.2.2 nathanw 44 1.10.2.2 nathanw #include <machine/cpu.h> 45 1.10.2.2 nathanw #include <machine/reg.h> 46 1.10.2.2 nathanw #include <machine/alpha.h> 47 1.10.2.2 nathanw 48 1.10.2.2 nathanw /* 49 1.10.2.2 nathanw * System call to cleanup state after a signal 50 1.10.2.2 nathanw * has been taken. Reset signal mask and 51 1.10.2.2 nathanw * stack state from context left by sendsig (above). 52 1.10.2.2 nathanw * Return to previous pc and psl as specified by 53 1.10.2.2 nathanw * context left by sendsig. Check carefully to 54 1.10.2.2 nathanw * make sure that the user has not modified the 55 1.10.2.2 nathanw * psl to gain improper privileges or to cause 56 1.10.2.2 nathanw * a machine fault. 57 1.10.2.2 nathanw */ 58 1.10.2.2 nathanw /* ARGSUSED */ 59 1.10.2.2 nathanw int 60 1.10.2.2 nathanw compat_13_sys_sigreturn(l, v, retval) 61 1.10.2.2 nathanw struct lwp *l; 62 1.10.2.2 nathanw void *v; 63 1.10.2.2 nathanw register_t *retval; 64 1.10.2.2 nathanw { 65 1.10.2.2 nathanw struct compat_13_sys_sigreturn_args /* { 66 1.10.2.2 nathanw syscallarg(struct sigcontext13 *) sigcntxp; 67 1.10.2.2 nathanw } */ *uap = v; 68 1.10.2.2 nathanw struct sigcontext13 *scp, ksc; 69 1.10.2.2 nathanw sigset13_t mask13; 70 1.10.2.2 nathanw sigset_t mask; 71 1.10.2.2 nathanw 72 1.10.2.2 nathanw /* 73 1.10.2.2 nathanw * The trampoline code hands us the context. 74 1.10.2.2 nathanw * It is unsafe to keep track of it ourselves, in the event that a 75 1.10.2.2 nathanw * program jumps out of a signal handler. 76 1.10.2.2 nathanw */ 77 1.10.2.2 nathanw scp = SCARG(uap, sigcntxp); 78 1.10.2.2 nathanw if (ALIGN(scp) != (u_int64_t)scp) 79 1.10.2.2 nathanw return (EINVAL); 80 1.10.2.2 nathanw 81 1.10.2.2 nathanw if (copyin((caddr_t)scp, &ksc, sizeof(ksc)) != 0) 82 1.10.2.2 nathanw return (EFAULT); 83 1.10.2.2 nathanw 84 1.10.2.2 nathanw if (ksc.sc_regs[R_ZERO] != 0xACEDBADE) /* magic number */ 85 1.10.2.2 nathanw return (EINVAL); 86 1.10.2.2 nathanw 87 1.10.2.2 nathanw /* Restore register context. */ 88 1.10.2.2 nathanw l->l_md.md_tf->tf_regs[FRAME_PC] = ksc.sc_pc; 89 1.10.2.2 nathanw l->l_md.md_tf->tf_regs[FRAME_PS] = 90 1.10.2.2 nathanw (ksc.sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR; 91 1.10.2.2 nathanw 92 1.10.2.2 nathanw regtoframe((struct reg *)ksc.sc_regs, l->l_md.md_tf); 93 1.10.2.2 nathanw alpha_pal_wrusp(ksc.sc_regs[R_SP]); 94 1.10.2.2 nathanw 95 1.10.2.2 nathanw /* XXX ksc.sc_ownedfp ? */ 96 1.10.2.2 nathanw if (l->l_addr->u_pcb.pcb_fpcpu != NULL) 97 1.10.2.2 nathanw fpusave_proc(l, 0); 98 1.10.2.2 nathanw memcpy(&l->l_addr->u_pcb.pcb_fp, (struct fpreg *)ksc.sc_fpregs, 99 1.10.2.2 nathanw sizeof(struct fpreg)); 100 1.10.2.2 nathanw /* XXX ksc.sc_fp_control ? */ 101 1.10.2.2 nathanw 102 1.10.2.2 nathanw /* Restore signal stack. */ 103 1.10.2.2 nathanw if (ksc.sc_onstack & SS_ONSTACK) 104 1.10.2.2 nathanw l->l_proc->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 105 1.10.2.2 nathanw else 106 1.10.2.2 nathanw l->l_proc->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 107 1.10.2.2 nathanw 108 1.10.2.2 nathanw /* 109 1.10.2.2 nathanw * Restore signal mask. Note the mask is a "long" in the stack 110 1.10.2.2 nathanw * frame. 111 1.10.2.2 nathanw */ 112 1.10.2.2 nathanw mask13 = ksc.sc_mask; 113 1.10.2.2 nathanw native_sigset13_to_sigset(&mask13, &mask); 114 1.10.2.2 nathanw (void) sigprocmask1(l->l_proc, SIG_SETMASK, &mask, 0); 115 1.10.2.2 nathanw 116 1.10.2.2 nathanw return (EJUSTRETURN); 117 1.10.2.2 nathanw } 118
Indexes created Fri Oct 31 11:10:07 GMT 2025