130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/*-
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* Copyright (c) 2001 Jake Burkholder.
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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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/cons.h>
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#include <sys/ktr.h>
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#include <sys/linker_set.h>
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#include <sys/lock.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <machine/cpu.h>
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#include <machine/md_var.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <ddb/ddb.h>
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#include <ddb/db_access.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_variables.h>
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#include <machine/atomic.h>
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#include <machine/setjmp.h>
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static jmp_buf *db_nofault = 0;
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extern jmp_buf db_jmpbuf;
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int db_active;
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db_regs_t ddb_regs;
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static jmp_buf db_global_jmpbuf;
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static int db_global_jmpbuf_valid;
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int
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kdb_trap(struct trapframe *tf)
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{
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if (db_global_jmpbuf_valid)
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longjmp(db_global_jmpbuf, 1);
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flushw();
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ddb_regs = *tf;
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critical_enter();
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setjmp(db_global_jmpbuf);
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db_global_jmpbuf_valid = TRUE;
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atomic_add_acq_int(&db_active, 1);
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#ifdef SMP
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stop_cpus(PCPU_GET(other_cpus));
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#endif
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cndbctl(TRUE);
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db_trap(tf->tf_type, 0);
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cndbctl(FALSE);
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db_active--;
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#ifdef SMP
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restart_cpus(stopped_cpus);
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#endif
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db_global_jmpbuf_valid = FALSE;
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critical_exit();
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*tf = ddb_regs;
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TF_DONE(tf);
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return (1);
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}
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void
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db_read_bytes(vm_offset_t addr, size_t size, char *data)
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{
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char *src;
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db_nofault = &db_jmpbuf;
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src = (char *)addr;
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while (size-- > 0)
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*data++ = *src++;
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db_nofault = NULL;
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}
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void
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db_write_bytes(vm_offset_t addr, size_t size, char *data)
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{
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char *dst;
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db_nofault = &db_jmpbuf;
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dst = (char *)addr;
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while (size-- > 0)
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*dst++ = *data++;
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db_nofault = NULL;
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}
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void
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db_show_mdpcpu(struct pcpu *pc)
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{
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}
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DB_COMMAND(reboot, db_reboot)
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{
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cpu_reset();
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}
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DB_COMMAND(halt, db_halt)
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{
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cpu_halt();
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}
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