mirror of https://github.com/F-Stack/f-stack.git
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/*-
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* Copyright (c) 2004 Marcel Moolenaar
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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/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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void *
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gdb_cpu_getreg(int regnum, size_t *regsz)
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{
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static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);
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static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);
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static uint32_t _kprivsel = GSEL(GPRIV_SEL, SEL_KPL);
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*regsz = gdb_cpu_regsz(regnum);
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if (kdb_thread == curthread) {
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switch (regnum) {
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case 0: return (&kdb_frame->tf_eax);
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case 1: return (&kdb_frame->tf_ecx);
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case 2: return (&kdb_frame->tf_edx);
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case 9: return (&kdb_frame->tf_eflags);
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case 10: return (&kdb_frame->tf_cs);
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case 12: return (&kdb_frame->tf_ds);
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case 13: return (&kdb_frame->tf_es);
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case 14: return (&kdb_frame->tf_fs);
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}
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}
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switch (regnum) {
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case 3: return (&kdb_thrctx->pcb_ebx);
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case 4: return (&kdb_thrctx->pcb_esp);
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case 5: return (&kdb_thrctx->pcb_ebp);
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case 6: return (&kdb_thrctx->pcb_esi);
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case 7: return (&kdb_thrctx->pcb_edi);
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case 8: return (&kdb_thrctx->pcb_eip);
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case 10: return (&_kcodesel);
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case 11: return (&_kdatasel);
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case 12: return (&_kdatasel);
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case 13: return (&_kdatasel);
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case 14: return (&_kprivsel);
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case 15: return (&kdb_thrctx->pcb_gs);
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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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kdb_thrctx->pcb_eip = *(register_t *)val;
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if (kdb_thread == curthread)
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kdb_frame->tf_eip = *(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 & ~T_USER) {
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case 0: return (SIGFPE); /* Divide by zero. */
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case 1: return (SIGTRAP); /* Debug exception. */
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case 3: return (SIGTRAP); /* Breakpoint. */
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case 4: return (SIGURG); /* into instr. (overflow). */
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case 5: return (SIGURG); /* bound instruction. */
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case 6: return (SIGILL); /* Invalid opcode. */
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case 7: return (SIGFPE); /* Coprocessor not present. */
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case 8: return (SIGEMT); /* Double fault. */
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case 9: return (SIGSEGV); /* Coprocessor segment overrun. */
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case 10: return (SIGTRAP); /* Invalid TSS (also single-step). */
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case 11: return (SIGSEGV); /* Segment not present. */
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case 12: return (SIGSEGV); /* Stack exception. */
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case 13: return (SIGSEGV); /* General protection. */
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case 14: return (SIGSEGV); /* Page fault. */
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case 16: return (SIGEMT); /* Coprocessor error. */
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}
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return (SIGEMT);
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}
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