43e4187c13
Previously, debug exceptions were only enabled on the boot CPU if DDB was enabled in the dbg_monitor_init() function. APs also called this function, but since mp_machdep.c doesn't include opt_ddb.h, the APs ended up calling an empty stub defined in <machine/debug_monitor.h> instead of the real function. Also, if DDB was not enabled in the kernel, the boot CPU would not enable debug exceptions. Fix this by adding a new dbg_init() function that always clears the OS lock to enable debug exceptions which the boot CPU and the APs call. This function also calls dbg_monitor_init() to enable hardware breakpoints from DDB on all CPUs if DDB is enabled. Eventually base support for hardware breakpoints/watchpoints will need to move out of the DDB-only debug_monitor.c for use by userland debuggers. Reviewed by: andrew Differential Revision: https://reviews.freebsd.org/D12001
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/*-
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* Copyright (c) 2013 Andrew Turner <andrew@freebsd.org>
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* All rights reserved.
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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_MACHDEP_H_
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#define _MACHINE_MACHDEP_H_
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struct arm64_bootparams {
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vm_offset_t modulep;
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vm_offset_t kern_l1pt; /* L1 page table for the kernel */
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uint64_t kern_delta;
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vm_offset_t kern_stack;
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vm_offset_t kern_l0pt; /* L1 page table for the kernel */
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};
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enum arm64_bus {
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ARM64_BUS_NONE,
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ARM64_BUS_FDT,
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ARM64_BUS_ACPI,
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};
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extern enum arm64_bus arm64_bus_method;
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extern vm_paddr_t physmap[];
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extern u_int physmap_idx;
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void dbg_init(void);
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void initarm(struct arm64_bootparams *);
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extern void (*pagezero)(void *);
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#endif /* _MACHINE_MACHDEP_H_ */
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