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Annotation of sys/arch/mips64/mips64/process_machdep.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: process_machdep.c,v 1.7 2007/04/26 17:05:11 miod Exp $        */
                      2:
                      3: /*
                      4:  * Copyright (c) 1994 Adam Glass
                      5:  * Copyright (c) 1993 The Regents of the University of California.
                      6:  * Copyright (c) 1993 Jan-Simon Pendry
                      7:  * All rights reserved.
                      8:  *
                      9:  * This code is derived from software contributed to Berkeley by
                     10:  * Jan-Simon Pendry.
                     11:  *
                     12:  * Redistribution and use in source and binary forms, with or without
                     13:  * modification, are permitted provided that the following conditions
                     14:  * are met:
                     15:  * 1. Redistributions of source code must retain the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer.
                     17:  * 2. Redistributions in binary form must reproduce the above copyright
                     18:  *    notice, this list of conditions and the following disclaimer in the
                     19:  *    documentation and/or other materials provided with the distribution.
                     20:  * 3. All advertising materials mentioning features or use of this software
                     21:  *    must display the following acknowledgement:
                     22:  *     This product includes software developed by the University of
                     23:  *     California, Berkeley and its contributors.
                     24:  * 4. Neither the name of the University nor the names of its contributors
                     25:  *    may be used to endorse or promote products derived from this software
                     26:  *    without specific prior written permission.
                     27:  *
                     28:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     29:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     30:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     31:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     32:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     33:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     34:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     35:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     36:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     37:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     38:  * SUCH DAMAGE.
                     39:  *
                     40:  * From:
                     41:  *     Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
                     42:  *
                     43:  *     $Id: process_machdep.c,v 1.7 2007/04/26 17:05:11 miod Exp $
                     44:  */
                     45:
                     46: /*
                     47:  * This file may seem a bit stylized, but that so that it's easier to port.
                     48:  * Functions to be implemented here are:
                     49:  *
                     50:  * process_read_regs(proc, regs)
                     51:  *     Get the current user-visible register set from the process
                     52:  *     and copy it into the regs structure (<machine/reg.h>).
                     53:  *     The process is stopped at the time read_regs is called.
                     54:  *
                     55:  * process_write_regs(proc, regs)
                     56:  *     Update the current register set from the passed in regs
                     57:  *     structure.  Take care to avoid clobbering special CPU
                     58:  *     registers or privileged bits in the PSL.
                     59:  *     The process is stopped at the time write_regs is called.
                     60:  *
                     61:  * process_sstep(proc)
                     62:  *     Arrange for the process to trap after executing a single instruction.
                     63:  *
                     64:  * process_set_pc(proc)
                     65:  *     Set the process's program counter.
                     66:  */
                     67:
                     68: #include <sys/param.h>
                     69: #include <sys/systm.h>
                     70: #include <sys/time.h>
                     71: #include <sys/kernel.h>
                     72: #include <sys/proc.h>
                     73: #include <sys/user.h>
                     74: #include <sys/vnode.h>
                     75: #include <sys/ptrace.h>
                     76: #include <machine/pte.h>
                     77: #include <machine/psl.h>
                     78: #include <machine/frame.h>
                     79:
                     80: #define        REGSIZE sizeof(struct trap_frame)
                     81:
                     82: extern void cpu_singlestep(struct proc *);
                     83:
                     84: int
                     85: process_read_regs(p, regs)
                     86:        struct proc *p;
                     87:        struct reg *regs;
                     88: {
                     89:        extern struct proc *machFPCurProcPtr;
                     90:
                     91:        if (p == machFPCurProcPtr) {
                     92:                if (p->p_md.md_regs->sr & SR_FR_32)
                     93:                        MipsSaveCurFPState(p);
                     94:                else
                     95:                        MipsSaveCurFPState16(p);
                     96:        }
                     97:        bcopy((caddr_t)p->p_md.md_regs, (caddr_t)regs, REGSIZE);
                     98:        return (0);
                     99: }
                    100:
                    101: #ifdef PTRACE
                    102:
                    103: int
                    104: process_write_regs(p, regs)
                    105:        struct proc *p;
                    106:        struct reg *regs;
                    107: {
                    108:        register_t sr;
                    109:        extern struct proc *machFPCurProcPtr;
                    110:
                    111:        if (p == machFPCurProcPtr) {
                    112:                if (p->p_md.md_regs->sr & SR_FR_32)
                    113:                        MipsSaveCurFPState(p);
                    114:                else
                    115:                        MipsSaveCurFPState16(p);
                    116:        }
                    117:        sr = p->p_md.md_regs->sr;
                    118:        bcopy((caddr_t)regs, (caddr_t)p->p_md.md_regs, REGSIZE);
                    119:        p->p_md.md_regs->sr = sr;
                    120:        return (0);
                    121: }
                    122:
                    123: int
                    124: process_sstep(p, sstep)
                    125:        struct proc *p;
                    126: {
                    127:        if (sstep)
                    128:                cpu_singlestep(p);
                    129:        return (0);
                    130: }
                    131:
                    132: int
                    133: process_set_pc(p, addr)
                    134:        struct proc *p;
                    135:        caddr_t addr;
                    136: {
                    137:        p->p_md.md_regs->pc = (register_t)addr;
                    138:        return (0);
                    139: }
                    140:
                    141: #endif /* PTRACE */