/* Tracing support for CGEN-based simulators.
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include "sim-main.h"
+#include <errno.h>
+#include "dis-asm.h"
#include "bfd.h"
-#include "cpu-opc.h"
+#include "sim-main.h"
+
+#undef min
+#define min(a,b) ((a) < (b) ? (a) : (b))
#ifndef SIZE_INSTRUCTION
#define SIZE_INSTRUCTION 16
#define SIZE_TRACE_BUF 256
#endif
+static void
+disassemble_insn (SIM_CPU *, const CGEN_INSN *,
+ const struct argbuf *, IADDR, char *);
+
/* Text is queued in TRACE_BUF because we want to output the insn's cycle
count first but that isn't known until after the insn has executed.
This also handles the queueing of trace results, TRACE_RESULT may be
Set by trace_insn, used by trace_insn_fini.
??? Move to SIM_CPU to support heterogeneous multi-cpu case. */
static const struct cgen_insn *current_insn;
-static CGEN_FIELDS insn_fields;
static const struct argbuf *current_abuf;
void
#if 0
/* Print insn results. */
{
- const CGEN_OPERAND_INSTANCE *opinst = CGEN_INSN_OPERANDS (current_insn);
+ const CGEN_OPINST *opinst = CGEN_INSN_OPERANDS (current_insn);
if (opinst)
{
int indices[MAX_OPERAND_INSTANCES];
/* Fetch the operands used by the insn. */
- /* FIXME: Add fn ptr to CGEN_OPCODE_DESC. */
- CGEN_SYM (get_insn_operands) (STATE_OPCODE_TABLE (sd), current_insn,
+ /* FIXME: Add fn ptr to CGEN_CPU_DESC. */
+ CGEN_SYM (get_insn_operands) (CPU_CPU_DESC (cpu), current_insn,
0, CGEN_FIELDS_BITSIZE (&insn_fields),
indices);
for (i = 0;
- CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
+ CGEN_OPINST_TYPE (opinst) != CGEN_OPINST_END;
++i, ++opinst)
{
- if (CGEN_OPERAND_INSTANCE_TYPE (opinst) == CGEN_OPERAND_INSTANCE_OUTPUT)
+ if (CGEN_OPINST_TYPE (opinst) == CGEN_OPINST_OUTPUT)
trace_result (cpu, current_insn, opinst, indices[i]);
}
}
void
trace_insn (SIM_CPU *cpu, const struct cgen_insn *opcode,
- const struct argbuf *abuf, PCADDR pc)
+ const struct argbuf *abuf, IADDR pc)
{
char disasm_buf[50];
return;
}
- sim_disassemble_insn (cpu, opcode, abuf, pc, disasm_buf, &insn_fields);
+ CPU_DISASSEMBLER (cpu) (cpu, opcode, abuf, pc, disasm_buf);
trace_prefix (CPU_STATE (cpu), cpu, NULL_CIA, pc, TRACE_LINENUM_P (cpu),
NULL, 0,
"%s%-*s",
}
void
-trace_extract (SIM_CPU *cpu, PCADDR pc, char *name, ...)
+trace_extract (SIM_CPU *cpu, IADDR pc, char *name, ...)
{
va_list args;
int printed_one_p = 0;
va_end (args);
}
+\f
+/* Disassembly support. */
+
+/* sprintf to a "stream" */
+
+int
+sim_disasm_sprintf VPARAMS ((SFILE *f, const char *format, ...))
+{
+#ifndef __STDC__
+ SFILE *f;
+ const char *format;
+#endif
+ int n;
+ va_list args;
+
+ VA_START (args, format);
+#ifndef __STDC__
+ f = va_arg (args, SFILE *);
+ format = va_arg (args, char *);
+#endif
+ vsprintf (f->current, format, args);
+ f->current += n = strlen (f->current);
+ va_end (args);
+ return n;
+}
+
+/* Memory read support for an opcodes disassembler. */
+
+int
+sim_disasm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
+ struct disassemble_info *info)
+{
+ SIM_CPU *cpu = (SIM_CPU *) info->application_data;
+ SIM_DESC sd = CPU_STATE (cpu);
+ int length_read;
+
+ length_read = sim_core_read_buffer (sd, cpu, read_map, myaddr, memaddr,
+ length);
+ if (length_read != length)
+ return EIO;
+ return 0;
+}
+
+/* Memory error support for an opcodes disassembler. */
+
+void
+sim_disasm_perror_memory (int status, bfd_vma memaddr,
+ struct disassemble_info *info)
+{
+ if (status != EIO)
+ /* Can't happen. */
+ info->fprintf_func (info->stream, "Unknown error %d.", status);
+ else
+ /* Actually, address between memaddr and memaddr + len was
+ out of bounds. */
+ info->fprintf_func (info->stream,
+ "Address 0x%x is out of bounds.",
+ (int) memaddr);
+}
+
+/* Disassemble using the CGEN opcode table.
+ ??? While executing an instruction, the insn has been decoded and all its
+ fields have been extracted. It is certainly possible to do the disassembly
+ with that data. This seems simpler, but maybe in the future the already
+ extracted fields will be used. */
+
+void
+sim_cgen_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
+ const ARGBUF *abuf, IADDR pc, char *buf)
+{
+ unsigned int length;
+ unsigned long insn_value;
+ struct disassemble_info disasm_info;
+ SFILE sfile;
+ union {
+ unsigned8 bytes[CGEN_MAX_INSN_SIZE];
+ unsigned16 shorts[8];
+ unsigned32 words[4];
+ } insn_buf;
+ SIM_DESC sd = CPU_STATE (cpu);
+ CGEN_CPU_DESC cd = CPU_CPU_DESC (cpu);
+ CGEN_EXTRACT_INFO ex_info;
+ CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd));
+ int insn_bit_length = CGEN_INSN_BITSIZE (insn);
+ int insn_length = insn_bit_length / 8;
+
+ sfile.buffer = sfile.current = buf;
+ INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile,
+ (fprintf_ftype) sim_disasm_sprintf);
+ disasm_info.endian =
+ (bfd_big_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_BIG
+ : bfd_little_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_LITTLE
+ : BFD_ENDIAN_UNKNOWN);
+
+ length = sim_core_read_buffer (sd, cpu, read_map, &insn_buf, pc,
+ insn_length);
+
+ switch (min (cd->base_insn_bitsize, insn_bit_length))
+ {
+ case 0 : return; /* fake insn, typically "compile" (aka "invalid") */
+ case 8 : insn_value = insn_buf.bytes[0]; break;
+ case 16 : insn_value = T2H_2 (insn_buf.shorts[0]); break;
+ case 32 : insn_value = T2H_4 (insn_buf.words[0]); break;
+ default: abort ();
+ }
+
+ disasm_info.buffer_vma = pc;
+ disasm_info.buffer = insn_buf.bytes;
+ disasm_info.buffer_length = length;
+
+ ex_info.dis_info = (PTR) &disasm_info;
+ ex_info.valid = (1 << length) - 1;
+ ex_info.insn_bytes = insn_buf.bytes;
+
+ length = (*CGEN_EXTRACT_FN (cd, insn)) (cd, insn, &ex_info, insn_value, fields, pc);
+ /* Result of extract fn is in bits. */
+ /* ??? This assumes that each instruction has a fixed length (and thus
+ for insns with multiple versions of variable lengths they would each
+ have their own table entry). */
+ if (length == insn_bit_length)
+ {
+ (*CGEN_PRINT_FN (cd, insn)) (cd, &disasm_info, insn, fields, pc, length);
+ }
+ else
+ {
+ /* This shouldn't happen, but aborting is too drastic. */
+ strcpy (buf, "***unknown***");
+ }
+}
projects / deliverable / binutils-gdb.git / blobdiff