f2583be110
The motivation is to provide access to these registers from userspace via ptrace(2) requests PT_GETDBREGS and PT_SETDBREGS. This change breaks the ABI of these particular requests, but is justified by the fact that the intended consumers (debuggers) have not been taught to use them yet. Making this change now enables active upstream work on lldb to begin using this interface, and take advantage of the hardware debugging registers available on the platform. PR: 252860 Reported by: Michał Górny (mgorny@gentoo.org) Reviewed by: andrew, markj (earlier version) Tested by: Michał Górny (mgorny@gentoo.org) MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D28415
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*-
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* Copyright (c) 2014 Andrew Turner
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* Copyright (c) 2014-2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_REG_H_
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#define _MACHINE_REG_H_
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struct reg {
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uint64_t x[30];
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uint64_t lr;
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uint64_t sp;
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uint64_t elr;
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uint32_t spsr;
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};
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struct reg32 {
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unsigned int r[13];
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unsigned int r_sp;
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unsigned int r_lr;
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unsigned int r_pc;
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unsigned int r_cpsr;
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};
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struct fpreg {
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__uint128_t fp_q[32];
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uint32_t fp_sr;
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uint32_t fp_cr;
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};
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struct fpreg32 {
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int dummy;
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};
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struct dbreg {
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uint8_t db_debug_ver;
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uint8_t db_nbkpts;
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uint8_t db_nwtpts;
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uint8_t db_pad[5];
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struct {
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uint64_t dbr_addr;
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uint32_t dbr_ctrl;
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uint32_t dbr_pad;
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} db_breakregs[16];
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struct {
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uint64_t dbw_addr;
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uint32_t dbw_ctrl;
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uint32_t dbw_pad;
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} db_watchregs[16];
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};
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struct dbreg32 {
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int dummy;
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};
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#define __HAVE_REG32
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#ifdef _KERNEL
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/*
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* XXX these interfaces are MI, so they should be declared in a MI place.
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*/
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int fill_regs(struct thread *, struct reg *);
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int set_regs(struct thread *, struct reg *);
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int fill_fpregs(struct thread *, struct fpreg *);
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int set_fpregs(struct thread *, struct fpreg *);
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int fill_dbregs(struct thread *, struct dbreg *);
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int set_dbregs(struct thread *, struct dbreg *);
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#ifdef COMPAT_FREEBSD32
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int fill_regs32(struct thread *, struct reg32 *);
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int set_regs32(struct thread *, struct reg32 *);
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int fill_fpregs32(struct thread *, struct fpreg32 *);
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int set_fpregs32(struct thread *, struct fpreg32 *);
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int fill_dbregs32(struct thread *, struct dbreg32 *);
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int set_dbregs32(struct thread *, struct dbreg32 *);
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#endif
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#endif
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#endif /* !_MACHINE_REG_H_ */
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