/* $NetBSD: process_machdep.c,v 1.35 2021/02/01 19:31:34 skrll Exp $ */ /* * Copyright (c) 1993 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * From: * Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel */ /* * Copyright (c) 1995 Frank Lancaster. All rights reserved. * Copyright (c) 1995 Tools GmbH. All rights reserved. * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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. */ /* * Copyright (c) 1995 Charles M. Hannum. All rights reserved. * Copyright (c) 1993 Jan-Simon Pendry * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * From: * Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel */ /* * This file may seem a bit stylized, but that so that it's easier to port. * Functions to be implemented here are: * * process_read_regs(proc, regs) * Get the current user-visible register set from the process * and copy it into the regs structure (<machine/reg.h>). * The process is stopped at the time read_regs is called. * * process_write_regs(proc, regs) * Update the current register set from the passed in regs * structure. Take care to avoid clobbering special CPU * registers or privileged bits in the PSL. * The process is stopped at the time write_regs is called. * * process_sstep(proc, sstep) * Arrange for the process to trap or not trap depending on sstep * after executing a single instruction. * * process_set_pc(proc) * Set the process's program counter. */ #ifdef _KERNEL_OPT #include "opt_armfpe.h" #endif #include <sys/param.h> __KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.35 2021/02/01 19:31:34 skrll Exp $"); #include <sys/proc.h> #include <sys/ptrace.h> #include <sys/systm.h> #include <arm/armreg.h> #include <arm/vfpreg.h> #include <arm/locore.h> #include <machine/pcb.h> #include <machine/reg.h> int process_read_regs(struct lwp *l, struct reg *regs) { struct trapframe * const tf = lwp_trapframe(l); KASSERT(tf != NULL); memcpy((void *)regs->r, (void *)&tf->tf_r0, sizeof(regs->r)); regs->r_sp = tf->tf_usr_sp; regs->r_lr = tf->tf_usr_lr; regs->r_pc = tf->tf_pc; regs->r_cpsr = tf->tf_spsr; KASSERT(VALID_PSR(tf->tf_spsr)); #ifdef THUMB_CODE if (tf->tf_spsr & PSR_T_bit) regs->r_pc |= 1; #endif return 0; } int process_read_fpregs(struct lwp *l, struct fpreg *regs, size_t *sz) { #ifdef FPU_VFP if (curcpu()->ci_vfp_id == 0) { memset(regs, 0, sizeof(*regs)); return 0; } const struct pcb * const pcb = lwp_getpcb(l); vfp_savecontext(l); regs->fpr_vfp = pcb->pcb_vfp; regs->fpr_vfp.vfp_fpexc &= ~VFP_FPEXC_EN; #endif return 0; } int process_write_regs(struct lwp *l, const struct reg *regs) { struct trapframe * const tf = lwp_trapframe(l); KASSERT(tf != NULL); memcpy(&tf->tf_r0, regs->r, sizeof(regs->r)); tf->tf_usr_sp = regs->r_sp; tf->tf_usr_lr = regs->r_lr; tf->tf_pc = regs->r_pc; tf->tf_spsr &= ~(PSR_FLAGS | PSR_T_bit); tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; #ifdef THUMB_CODE if ((regs->r_pc & 1) || (regs->r_cpsr & PSR_T_bit)) tf->tf_spsr |= PSR_T_bit; #endif KASSERT(VALID_PSR(tf->tf_spsr)); return 0; } int process_write_fpregs(struct lwp *l, const struct fpreg *regs, size_t sz) { #ifdef FPU_VFP if (curcpu()->ci_vfp_id == 0) { return EINVAL; } struct pcb * const pcb = lwp_getpcb(l); vfp_discardcontext(l, true); pcb->pcb_vfp = regs->fpr_vfp; pcb->pcb_vfp.vfp_fpexc &= ~VFP_FPEXC_EN; #endif return 0; } int process_set_pc(struct lwp *l, void *addr) { struct trapframe * const tf = lwp_trapframe(l); KASSERT(tf != NULL); tf->tf_pc = (int)addr; #ifdef THUMB_CODE if (((int)addr) & 1) tf->tf_spsr |= PSR_T_bit; else tf->tf_spsr &= ~PSR_T_bit; #endif return 0; }
