278 lines
6.5 KiB
C
278 lines
6.5 KiB
C
/* Tracing support for CGEN-based simulators.
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Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "sim-main.h"
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#include "bfd.h"
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#include "cpu-opc.h"
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#ifndef SIZE_INSTRUCTION
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#define SIZE_INSTRUCTION 16
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#endif
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#ifndef SIZE_LOCATION
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#define SIZE_LOCATION 20
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#endif
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#ifndef SIZE_PC
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#define SIZE_PC 6
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#endif
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#ifndef SIZE_LINE_NUMBER
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#define SIZE_LINE_NUMBER 4
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#endif
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#ifndef SIZE_CYCLE_COUNT
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#define SIZE_CYCLE_COUNT 2
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#endif
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#ifndef SIZE_TOTAL_CYCLE_COUNT
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#define SIZE_TOTAL_CYCLE_COUNT 9
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#endif
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#ifndef SIZE_TRACE_BUF
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#define SIZE_TRACE_BUF 256
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#endif
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/* Text is queued in TRACE_BUF because we want to output the insn's cycle
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count first but that isn't known until after the insn has executed.
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This also handles the queueing of trace results, TRACE_RESULT may be
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called multiple times for one insn. */
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static char trace_buf[SIZE_TRACE_BUF];
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/* If NULL, output to stdout directly. */
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static char *bufptr;
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/* Non-zero if this is the first insn in a set of parallel insns. */
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static int first_insn_p;
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/* For communication between trace_insn and trace_result. */
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static int printed_result_p;
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/* Insn and its extracted fields.
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Set by trace_insn, used by trace_insn_fini.
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??? Move to SIM_CPU to support heterogeneous multi-cpu case. */
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static const struct cgen_insn *current_insn;
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static CGEN_FIELDS insn_fields;
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static const struct argbuf *current_abuf;
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void
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trace_insn_init (SIM_CPU *cpu, int first_p)
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{
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bufptr = trace_buf;
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*bufptr = 0;
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first_insn_p = first_p;
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/* Set to NULL so trace_insn_fini can know if trace_insn was called. */
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current_insn = NULL;
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current_abuf = NULL;
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}
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void
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trace_insn_fini (SIM_CPU *cpu, const struct argbuf *abuf, int last_p)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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/* Was insn traced? It might not be if trace ranges are in effect. */
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if (current_insn == NULL)
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return;
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/* The first thing printed is current and total cycle counts. */
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if (PROFILE_MODEL_P (cpu)
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&& ARGBUF_PROFILE_P (current_abuf))
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{
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unsigned long total = PROFILE_MODEL_TOTAL_CYCLES (CPU_PROFILE_DATA (cpu));
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unsigned long this_insn = PROFILE_MODEL_CUR_INSN_CYCLES (CPU_PROFILE_DATA (cpu));
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if (last_p)
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{
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trace_printf (sd, cpu, "%-*ld %-*ld ",
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SIZE_CYCLE_COUNT, this_insn,
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SIZE_TOTAL_CYCLE_COUNT, total);
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}
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else
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{
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trace_printf (sd, cpu, "%-*ld %-*s ",
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SIZE_CYCLE_COUNT, this_insn,
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SIZE_TOTAL_CYCLE_COUNT, "---");
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}
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}
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/* Print the disassembled insn. */
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trace_printf (sd, cpu, "%s", TRACE_PREFIX (CPU_TRACE_DATA (cpu)));
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#if 0
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/* Print insn results. */
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{
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const CGEN_OPERAND_INSTANCE *opinst = CGEN_INSN_OPERANDS (current_insn);
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if (opinst)
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{
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int i;
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int indices[MAX_OPERAND_INSTANCES];
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/* Fetch the operands used by the insn. */
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/* FIXME: Add fn ptr to CGEN_OPCODE_DESC. */
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CGEN_SYM (get_insn_operands) (STATE_OPCODE_TABLE (sd), current_insn,
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0, CGEN_FIELDS_BITSIZE (&insn_fields),
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indices);
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for (i = 0;
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CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
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++i, ++opinst)
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{
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if (CGEN_OPERAND_INSTANCE_TYPE (opinst) == CGEN_OPERAND_INSTANCE_OUTPUT)
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trace_result (cpu, current_insn, opinst, indices[i]);
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}
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}
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}
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#endif
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/* Print anything else requested. */
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if (*trace_buf)
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trace_printf (sd, cpu, " %s\n", trace_buf);
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else
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trace_printf (sd, cpu, "\n");
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}
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void
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trace_insn (SIM_CPU *cpu, const struct cgen_insn *opcode,
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const struct argbuf *abuf, PCADDR pc)
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{
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char disasm_buf[50];
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printed_result_p = 0;
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current_insn = opcode;
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current_abuf = abuf;
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if (CGEN_INSN_VIRTUAL_P (opcode))
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{
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trace_prefix (CPU_STATE (cpu), cpu, NULL_CIA, pc, 0,
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NULL, 0, CGEN_INSN_NAME (opcode));
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return;
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}
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sim_disassemble_insn (cpu, opcode, abuf, pc, disasm_buf, &insn_fields);
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trace_prefix (CPU_STATE (cpu), cpu, NULL_CIA, pc, TRACE_LINENUM_P (cpu),
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NULL, 0,
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"%s%-*s",
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first_insn_p ? " " : "|",
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SIZE_INSTRUCTION, disasm_buf);
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}
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void
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trace_extract (SIM_CPU *cpu, PCADDR pc, char *name, ...)
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{
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va_list args;
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int printed_one_p = 0;
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char *fmt;
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va_start (args, name);
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trace_printf (CPU_STATE (cpu), cpu, "Extract: 0x%.*lx: %s ",
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SIZE_PC, pc, name);
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do {
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int type,ival;
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fmt = va_arg (args, char *);
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if (fmt)
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{
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if (printed_one_p)
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trace_printf (CPU_STATE (cpu), cpu, ", ");
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printed_one_p = 1;
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type = va_arg (args, int);
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switch (type)
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{
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case 'x' :
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ival = va_arg (args, int);
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trace_printf (CPU_STATE (cpu), cpu, fmt, ival);
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break;
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default :
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abort ();
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}
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}
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} while (fmt);
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va_end (args);
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trace_printf (CPU_STATE (cpu), cpu, "\n");
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}
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void
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trace_result (SIM_CPU *cpu, char *name, int type, ...)
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{
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va_list args;
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va_start (args, type);
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if (printed_result_p)
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cgen_trace_printf (cpu, ", ");
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switch (type)
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{
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case 'x' :
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default :
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cgen_trace_printf (cpu, "%s <- 0x%x", name, va_arg (args, int));
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break;
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case 'D' :
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{
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DI di;
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/* this is separated from previous line for sunos cc */
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di = va_arg (args, DI);
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cgen_trace_printf (cpu, "%s <- 0x%x%08x", name,
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GETHIDI(di), GETLODI (di));
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break;
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}
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}
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printed_result_p = 1;
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va_end (args);
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}
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/* Print trace output to BUFPTR if active, otherwise print normally.
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This is only for tracing semantic code. */
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void
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cgen_trace_printf (SIM_CPU *cpu, char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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if (bufptr == NULL)
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{
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if (TRACE_FILE (CPU_TRACE_DATA (cpu)) == NULL)
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(* STATE_CALLBACK (CPU_STATE (cpu))->evprintf_filtered)
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(STATE_CALLBACK (CPU_STATE (cpu)), fmt, args);
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else
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vfprintf (TRACE_FILE (CPU_TRACE_DATA (cpu)), fmt, args);
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}
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else
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{
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vsprintf (bufptr, fmt, args);
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bufptr += strlen (bufptr);
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/* ??? Need version of SIM_ASSERT that is always enabled. */
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if (bufptr - trace_buf > SIZE_TRACE_BUF)
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abort ();
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}
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va_end (args);
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}
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