2d4405aec8
Note that GDB at least implements single stepping for MIPS using software breakpoints explicitly rather than using PT_STEP, so this has only been tested via tests in ptrace_test which now pass rather than fail. - Fix several places to use uintptr_t instead of int for virtual addresses. - Check for errors from ptrace_read_int() when setting a breakpoint for a step. - Properly check for errors from ptrace_write_int() as it returns non-zero, not negative values on failure. - Change the error returns for ptrace_read_int() and ptrace_write_int() from ENOMEM to EFAULT. - Clear a single step breakpoint when it traps rather than waiting for it to be cleared from ptrace(). This matches the behavior of the arm port and in general seems a bit more reliable than waiting for ptrace() to clear it via FIX_SSTEP. - Drop the PROC_LOCK around ptrace_write_int() in ptrace_clear_single_step() since it can sleep. - Reorder the breakpoint handler in trap() to only read the instruction if the address matches the current thread's breakpoint address. - Replace various #if 0'd debugging printfs with KTR_PTRACE traces. Tested on: mips64
101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/* $OpenBSD: proc.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)proc.h 8.1 (Berkeley) 6/10/93
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* JNPR: proc.h,v 1.7.2.1 2007/09/10 06:25:24 girish
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROC_H_
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#define _MACHINE_PROC_H_
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#ifdef CPU_CNMIPS
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#include <machine/octeon_cop2.h>
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#endif
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/*
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* Machine-dependent part of the proc structure.
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*/
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struct mdthread {
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int md_flags; /* machine-dependent flags */
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#if defined(__mips_n64) || defined(__mips_n32) /* PHYSADDR_64_BIT */
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uint64_t md_upte[KSTACK_PAGES]; /* ptes for mapping u pcb */
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#else
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int md_upte[KSTACK_PAGES];
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#endif
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uintptr_t md_ss_addr; /* single step address for ptrace */
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int md_ss_instr; /* single step instruction for ptrace */
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register_t md_saved_intr;
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u_int md_spinlock_count;
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/* The following is CPU dependent, but kept in for compatibility */
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int md_pc_ctrl; /* performance counter control */
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int md_pc_count; /* performance counter */
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int md_pc_spill; /* performance counter spill */
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void *md_tls;
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size_t md_tls_tcb_offset; /* TCB offset */
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#ifdef CPU_CNMIPS
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struct octeon_cop2_state *md_cop2; /* kernel context */
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struct octeon_cop2_state *md_ucop2; /* userland context */
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#define COP2_OWNER_USERLAND 0x0000 /* Userland owns COP2 */
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#define COP2_OWNER_KERNEL 0x0001 /* Kernel owns COP2 */
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int md_cop2owner;
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#endif
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};
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/* md_flags */
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#define MDTD_FPUSED 0x0001 /* Process used the FPU */
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#define MDTD_COP2USED 0x0002 /* Process used the COP2 */
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struct mdproc {
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/* empty */
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};
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struct syscall_args {
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u_int code;
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struct sysent *callp;
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register_t args[8];
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int narg;
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struct trapframe *trapframe;
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};
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#ifdef __mips_n64
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#define KINFO_PROC_SIZE 1088
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#define KINFO_PROC32_SIZE 816
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#else
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#define KINFO_PROC_SIZE 816
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#endif
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#endif /* !_MACHINE_PROC_H_ */
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