1 /* Tracing support for CGEN-based simulators.
2 Copyright (C) 1996, 1997, 1998, 1999, 2007 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
5 This file is part of GDB, the GNU debugger.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #define min(a,b) ((a) < (b) ? (a) : (b))
29 #ifndef SIZE_INSTRUCTION
30 #define SIZE_INSTRUCTION 16
34 #define SIZE_LOCATION 20
41 #ifndef SIZE_LINE_NUMBER
42 #define SIZE_LINE_NUMBER 4
45 #ifndef SIZE_CYCLE_COUNT
46 #define SIZE_CYCLE_COUNT 2
49 #ifndef SIZE_TOTAL_CYCLE_COUNT
50 #define SIZE_TOTAL_CYCLE_COUNT 9
53 #ifndef SIZE_TRACE_BUF
54 #define SIZE_TRACE_BUF 1024
57 /* Text is queued in TRACE_BUF because we want to output the insn's cycle
58 count first but that isn't known until after the insn has executed.
59 This also handles the queueing of trace results, TRACE_RESULT may be
60 called multiple times for one insn. */
61 static char trace_buf[SIZE_TRACE_BUF];
62 /* If NULL, output to stdout directly. */
65 /* Non-zero if this is the first insn in a set of parallel insns. */
66 static int first_insn_p;
68 /* For communication between trace_insn and trace_result. */
69 static int printed_result_p;
71 /* Insn and its extracted fields.
72 Set by trace_insn, used by trace_insn_fini.
73 ??? Move to SIM_CPU to support heterogeneous multi-cpu case. */
74 static const struct cgen_insn *current_insn;
75 static const struct argbuf *current_abuf;
78 trace_insn_init (SIM_CPU *cpu, int first_p)
82 first_insn_p = first_p;
84 /* Set to NULL so trace_insn_fini can know if trace_insn was called. */
90 trace_insn_fini (SIM_CPU *cpu, const struct argbuf *abuf, int last_p)
92 SIM_DESC sd = CPU_STATE (cpu);
94 /* Was insn traced? It might not be if trace ranges are in effect. */
95 if (current_insn == NULL)
98 /* The first thing printed is current and total cycle counts. */
100 if (PROFILE_MODEL_P (cpu)
101 && ARGBUF_PROFILE_P (current_abuf))
103 unsigned long total = PROFILE_MODEL_TOTAL_CYCLES (CPU_PROFILE_DATA (cpu));
104 unsigned long this_insn = PROFILE_MODEL_CUR_INSN_CYCLES (CPU_PROFILE_DATA (cpu));
108 trace_printf (sd, cpu, "%-*ld %-*ld ",
109 SIZE_CYCLE_COUNT, this_insn,
110 SIZE_TOTAL_CYCLE_COUNT, total);
114 trace_printf (sd, cpu, "%-*ld %-*s ",
115 SIZE_CYCLE_COUNT, this_insn,
116 SIZE_TOTAL_CYCLE_COUNT, "---");
120 /* Print the disassembled insn. */
122 trace_printf (sd, cpu, "%s", TRACE_PREFIX (CPU_TRACE_DATA (cpu)));
125 /* Print insn results. */
127 const CGEN_OPINST *opinst = CGEN_INSN_OPERANDS (current_insn);
132 int indices[MAX_OPERAND_INSTANCES];
134 /* Fetch the operands used by the insn. */
135 /* FIXME: Add fn ptr to CGEN_CPU_DESC. */
136 CGEN_SYM (get_insn_operands) (CPU_CPU_DESC (cpu), current_insn,
137 0, CGEN_FIELDS_BITSIZE (&insn_fields),
141 CGEN_OPINST_TYPE (opinst) != CGEN_OPINST_END;
144 if (CGEN_OPINST_TYPE (opinst) == CGEN_OPINST_OUTPUT)
145 trace_result (cpu, current_insn, opinst, indices[i]);
151 /* Print anything else requested. */
154 trace_printf (sd, cpu, " %s\n", trace_buf);
156 trace_printf (sd, cpu, "\n");
160 trace_insn (SIM_CPU *cpu, const struct cgen_insn *opcode,
161 const struct argbuf *abuf, IADDR pc)
165 printed_result_p = 0;
166 current_insn = opcode;
169 if (CGEN_INSN_VIRTUAL_P (opcode))
171 trace_prefix (CPU_STATE (cpu), cpu, NULL_CIA, pc, 0,
172 NULL, 0, CGEN_INSN_NAME (opcode));
176 CPU_DISASSEMBLER (cpu) (cpu, opcode, abuf, pc, disasm_buf);
177 trace_prefix (CPU_STATE (cpu), cpu, NULL_CIA, pc, TRACE_LINENUM_P (cpu),
180 first_insn_p ? " " : "|",
181 SIZE_INSTRUCTION, disasm_buf);
185 trace_extract (SIM_CPU *cpu, IADDR pc, char *name, ...)
188 int printed_one_p = 0;
191 va_start (args, name);
193 trace_printf (CPU_STATE (cpu), cpu, "Extract: 0x%.*lx: %s ",
199 fmt = va_arg (args, char *);
204 trace_printf (CPU_STATE (cpu), cpu, ", ");
206 type = va_arg (args, int);
210 ival = va_arg (args, int);
211 trace_printf (CPU_STATE (cpu), cpu, fmt, ival);
220 trace_printf (CPU_STATE (cpu), cpu, "\n");
224 trace_result (SIM_CPU *cpu, char *name, int type, ...)
228 va_start (args, type);
229 if (printed_result_p)
230 cgen_trace_printf (cpu, ", ");
236 cgen_trace_printf (cpu, "%s <- 0x%x", name, va_arg (args, int));
243 /* this is separated from previous line for sunos cc */
244 di = va_arg (args, DI);
245 sim_fpu_64to (&f, di);
247 cgen_trace_printf (cpu, "%s <- ", name);
248 sim_fpu_printn_fpu (&f, (sim_fpu_print_func *) cgen_trace_printf, 4, cpu);
254 /* this is separated from previous line for sunos cc */
255 di = va_arg (args, DI);
256 cgen_trace_printf (cpu, "%s <- 0x%x%08x", name,
257 GETHIDI(di), GETLODI (di));
262 printed_result_p = 1;
266 /* Print trace output to BUFPTR if active, otherwise print normally.
267 This is only for tracing semantic code. */
270 cgen_trace_printf (SIM_CPU *cpu, char *fmt, ...)
274 va_start (args, fmt);
278 if (TRACE_FILE (CPU_TRACE_DATA (cpu)) == NULL)
279 (* STATE_CALLBACK (CPU_STATE (cpu))->evprintf_filtered)
280 (STATE_CALLBACK (CPU_STATE (cpu)), fmt, args);
282 vfprintf (TRACE_FILE (CPU_TRACE_DATA (cpu)), fmt, args);
286 vsprintf (bufptr, fmt, args);
287 bufptr += strlen (bufptr);
288 /* ??? Need version of SIM_ASSERT that is always enabled. */
289 if (bufptr - trace_buf > SIZE_TRACE_BUF)
296 /* Disassembly support. */
298 /* sprintf to a "stream" */
301 sim_disasm_sprintf VPARAMS ((SFILE *f, const char *format, ...))
310 VA_START (args, format);
312 f = va_arg (args, SFILE *);
313 format = va_arg (args, char *);
315 vsprintf (f->current, format, args);
316 f->current += n = strlen (f->current);
321 /* Memory read support for an opcodes disassembler. */
324 sim_disasm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
325 struct disassemble_info *info)
327 SIM_CPU *cpu = (SIM_CPU *) info->application_data;
328 SIM_DESC sd = CPU_STATE (cpu);
329 unsigned length_read;
331 length_read = sim_core_read_buffer (sd, cpu, read_map, myaddr, memaddr,
333 if (length_read != length)
338 /* Memory error support for an opcodes disassembler. */
341 sim_disasm_perror_memory (int status, bfd_vma memaddr,
342 struct disassemble_info *info)
346 info->fprintf_func (info->stream, "Unknown error %d.", status);
348 /* Actually, address between memaddr and memaddr + len was
350 info->fprintf_func (info->stream,
351 "Address 0x%x is out of bounds.",
355 /* Disassemble using the CGEN opcode table.
356 ??? While executing an instruction, the insn has been decoded and all its
357 fields have been extracted. It is certainly possible to do the disassembly
358 with that data. This seems simpler, but maybe in the future the already
359 extracted fields will be used. */
362 sim_cgen_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
363 const ARGBUF *abuf, IADDR pc, char *buf)
366 unsigned int base_length;
367 unsigned long insn_value;
368 struct disassemble_info disasm_info;
371 unsigned8 bytes[CGEN_MAX_INSN_SIZE];
372 unsigned16 shorts[8];
375 SIM_DESC sd = CPU_STATE (cpu);
376 CGEN_CPU_DESC cd = CPU_CPU_DESC (cpu);
377 CGEN_EXTRACT_INFO ex_info;
378 CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd));
379 int insn_bit_length = CGEN_INSN_BITSIZE (insn);
380 int insn_length = insn_bit_length / 8;
382 sfile.buffer = sfile.current = buf;
383 INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile,
384 (fprintf_ftype) sim_disasm_sprintf);
386 (bfd_big_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_BIG
387 : bfd_little_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_LITTLE
388 : BFD_ENDIAN_UNKNOWN);
390 length = sim_core_read_buffer (sd, cpu, read_map, &insn_buf, pc,
393 if (length != insn_length)
395 sim_io_error (sd, "unable to read address %x", pc);
398 /* If the entire insn will fit into an integer, then do it. Otherwise, just
399 use the bits of the base_insn. */
400 if (insn_bit_length <= 32)
401 base_length = insn_bit_length;
403 base_length = min (cd->base_insn_bitsize, insn_bit_length);
406 case 0 : return; /* fake insn, typically "compile" (aka "invalid") */
407 case 8 : insn_value = insn_buf.bytes[0]; break;
408 case 16 : insn_value = T2H_2 (insn_buf.shorts[0]); break;
409 case 32 : insn_value = T2H_4 (insn_buf.words[0]); break;
413 disasm_info.buffer_vma = pc;
414 disasm_info.buffer = insn_buf.bytes;
415 disasm_info.buffer_length = length;
417 ex_info.dis_info = (PTR) &disasm_info;
418 ex_info.valid = (1 << length) - 1;
419 ex_info.insn_bytes = insn_buf.bytes;
421 length = (*CGEN_EXTRACT_FN (cd, insn)) (cd, insn, &ex_info, insn_value, fields, pc);
422 /* Result of extract fn is in bits. */
423 /* ??? This assumes that each instruction has a fixed length (and thus
424 for insns with multiple versions of variable lengths they would each
425 have their own table entry). */
426 if (length == insn_bit_length)
428 (*CGEN_PRINT_FN (cd, insn)) (cd, &disasm_info, insn, fields, pc, length);
432 /* This shouldn't happen, but aborting is too drastic. */
433 strcpy (buf, "***unknown***");