108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/*-
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* Copyright (c) 2006 Olivier Houchard
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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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*
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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 AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/signal.h>
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#include <machine/gdb_machdep.h>
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#include <machine/db_machdep.h>
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#include <machine/vmparam.h>
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#include <machine/pcb.h>
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#include <machine/trap.h>
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#include <machine/frame.h>
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#include <machine/endian.h>
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#include <gdb/gdb.h>
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static register_t stacktest;
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void *
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gdb_cpu_getreg(int regnum, size_t *regsz)
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{
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*regsz = gdb_cpu_regsz(regnum);
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if (kdb_thread == curthread) {
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if (regnum < 15)
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return (&kdb_frame->tf_r0 + regnum);
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if (regnum == 15)
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return (&kdb_frame->tf_pc);
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if (regnum == 25)
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return (&kdb_frame->tf_spsr);
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}
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switch (regnum) {
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case 8: return (&kdb_thrctx->un_32.pcb32_r8);
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case 9: return (&kdb_thrctx->un_32.pcb32_r9);
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case 10: return (&kdb_thrctx->un_32.pcb32_r10);
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case 11: return (&kdb_thrctx->un_32.pcb32_r11);
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case 12: return (&kdb_thrctx->un_32.pcb32_r12);
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case 13: stacktest = kdb_thrctx->un_32.pcb32_sp + 5 * 4;
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return (&stacktest);
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case 15:
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/*
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* On context switch, the PC is not put in the PCB, but
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* we can retrieve it from the stack.
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*/
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if (kdb_thrctx->un_32.pcb32_sp > KERNBASE) {
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kdb_thrctx->un_32.pcb32_pc = *(register_t *)
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(kdb_thrctx->un_32.pcb32_sp + 4 * 4);
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return (&kdb_thrctx->un_32.pcb32_pc);
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}
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}
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return (NULL);
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}
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void
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gdb_cpu_setreg(int regnum, void *val)
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{
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switch (regnum) {
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case GDB_REG_PC:
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if (kdb_thread == curthread)
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kdb_frame->tf_pc = *(register_t *)val;
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}
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}
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int
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gdb_cpu_signal(int type, int code)
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{
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switch (type) {
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case T_BREAKPOINT: return (SIGTRAP);
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}
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return (SIGEMT);
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}
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