Home | History | Annotate | Line # | Download | only in riscv 
      1 /*	$NetBSD: process_machdep.c,v 1.5 2023/05/07 12:41:49 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 
     34 __RCSID("$NetBSD: process_machdep.c,v 1.5 2023/05/07 12:41:49 skrll Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/ptrace.h>
     38 
     39 #include <uvm/uvm_extern.h>
     40 
     41 #include <riscv/frame.h>
     42 #include <riscv/locore.h>
     43 
     44 int
     45 process_read_regs(struct lwp *l, struct reg *regs)
     46 {
     47 	//struct trapframe * const tf = l->l_md.md_utf;
     48 
     49 	*regs = l->l_md.md_utf->tf_regs;
     50 
     51 	return 0;
     52 }
     53 
     54 int
     55 process_write_regs(struct lwp *l, const struct reg *regs)
     56 {
     57 	//struct trapframe * const tf = l->l_md.md_utf;
     58 
     59 	l->l_md.md_utf->tf_regs = *regs;
     60 
     61 	return 0;
     62 }
     63 
     64 int
     65 process_read_fpregs(struct lwp *l, struct fpreg *fpregs, size_t *sz)
     66 {
     67 	struct pcb * const pcb = lwp_getpcb(l);
     68 
     69 	/* Is the process using the fpu? */
     70 	if (!fpu_valid_p(l)) {
     71 		memset(fpregs, 0, sizeof (*fpregs));
     72 		return 0;
     73 	}
     74 	fpu_save(l);
     75 	*fpregs = pcb->pcb_fpregs;
     76 
     77 	return 0;
     78 }
     79 
     80 int
     81 process_write_fpregs(struct lwp *l, const struct fpreg *fpregs, size_t sz)
     82 {
     83 	struct pcb * const pcb = lwp_getpcb(l);
     84 
     85 	fpu_replace(l);
     86 	pcb->pcb_fpregs = *fpregs;
     87 
     88 	return 0;
     89 }
     90 
     91 /*
     92  * Set the process's program counter.
     93  */
     94 int
     95 process_set_pc(struct lwp *l, void *addr)
     96 {
     97 	//struct trapframe * const tf = l->l_md.md_utf;
     98 
     99 	l->l_md.md_utf->tf_pc = (register_t)addr;
    100 
    101 	return 0;
    102 }
    103