+/* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
/* Disassembler interface for targets using CGEN. -*- C -*-
CGEN: Cpu tools GENerator
-This file is used to generate m32r-dis.c.
+ THIS FILE IS MACHINE GENERATED WITH CGEN.
+ - the resultant file is machine generated, cgen-dis.in isn't
-Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1996-2020 Free Software Foundation, Inc.
-This file is part of the GNU Binutils and GDB, the GNU debugger.
+ This file is part of libopcodes.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ It is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* ??? Eventually more and more of this stuff can go to cpu-independent files.
+ Keep that in mind. */
#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
-#include "dis-asm.h"
+#include "disassemble.h"
#include "bfd.h"
+#include "symcat.h"
+#include "libiberty.h"
+#include "m32r-desc.h"
#include "m32r-opc.h"
-
-/* ??? The layout of this stuff is still work in progress.
- For speed in assembly/disassembly, we use inline functions. That of course
- will only work for GCC. When this stuff is finished, we can decide whether
- to keep the inline functions (and only get the performance increase when
- compiled with GCC), or switch to macros, or use something else.
-*/
+#include "opintl.h"
/* Default text to print if an instruction isn't recognized. */
-#define UNKNOWN_INSN_MSG "*unknown*"
+#define UNKNOWN_INSN_MSG _("*unknown*")
+
+static void print_normal
+ (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
+static void print_address
+ (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
+static void print_keyword
+ (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
+static void print_insn_normal
+ (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
+static int print_insn
+ (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned);
+static int default_print_insn
+ (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
+static int read_insn
+ (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
+ unsigned long *);
+\f
+/* -- disassembler routines inserted here. */
-/* FIXME: Machine generate. */
-#ifndef CGEN_PCREL_OFFSET
-#define CGEN_PCREL_OFFSET 0
-#endif
+/* -- dis.c */
-static int print_insn PARAMS ((bfd_vma, disassemble_info *, char *, int));
+/* Print signed operands with '#' prefixes. */
-static int extract_insn_normal
- PARAMS ((const CGEN_INSN *, void *, cgen_insn_t, CGEN_FIELDS *));
-static void print_insn_normal
- PARAMS ((void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int));
+static void
+print_signed_with_hash_prefix (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void * dis_info,
+ long value,
+ unsigned int attrs ATTRIBUTE_UNUSED,
+ bfd_vma pc ATTRIBUTE_UNUSED,
+ int length ATTRIBUTE_UNUSED)
+{
+ disassemble_info *info = (disassemble_info *) dis_info;
-CGEN_INLINE void
-m32r_cgen_print_operand
- PARAMS ((int opindex, disassemble_info * info, CGEN_FIELDS * fields, void const * attrs, bfd_vma pc, int length));
+ (*info->fprintf_func) (info->stream, "#");
+ (*info->fprintf_func) (info->stream, "%ld", value);
+}
-\f
-/* Default extraction routine.
+/* Print unsigned operands with '#' prefixes. */
- ATTRS is a mask of the boolean attributes. We only need `unsigned',
- but for generality we take a bitmask of all of them. */
+static void
+print_unsigned_with_hash_prefix (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void * dis_info,
+ long value,
+ unsigned int attrs ATTRIBUTE_UNUSED,
+ bfd_vma pc ATTRIBUTE_UNUSED,
+ int length ATTRIBUTE_UNUSED)
+{
+ disassemble_info *info = (disassemble_info *) dis_info;
+
+ (*info->fprintf_func) (info->stream, "#");
+ (*info->fprintf_func) (info->stream, "0x%lx", value);
+}
+
+/* Handle '#' prefixes as operands. */
+
+static void
+print_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void * dis_info,
+ long value ATTRIBUTE_UNUSED,
+ unsigned int attrs ATTRIBUTE_UNUSED,
+ bfd_vma pc ATTRIBUTE_UNUSED,
+ int length ATTRIBUTE_UNUSED)
+{
+ disassemble_info *info = (disassemble_info *) dis_info;
+
+ (*info->fprintf_func) (info->stream, "#");
+}
+
+#undef CGEN_PRINT_INSN
+#define CGEN_PRINT_INSN my_print_insn
static int
-extract_normal (buf_ctrl, insn_value, attrs, start, length, shift, total_length, valuep)
- void * buf_ctrl;
- cgen_insn_t insn_value;
- unsigned int attrs;
- int start;
- int length;
- int shift;
- int total_length;
- long * valuep;
+my_print_insn (CGEN_CPU_DESC cd,
+ bfd_vma pc,
+ disassemble_info *info)
{
- long value;
+ bfd_byte buffer[CGEN_MAX_INSN_SIZE];
+ bfd_byte *buf = buffer;
+ int status;
+ int buflen = (pc & 3) == 0 ? 4 : 2;
+ int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
+ bfd_byte *x;
-#ifdef CGEN_INT_INSN
-#if 0
- value = ((insn_value >> (CGEN_BASE_INSN_BITSIZE - (start + length)))
- & ((1 << length) - 1));
-#else
- value = ((insn_value >> (total_length - (start + length)))
- & ((1 << length) - 1));
-#endif
- if (! (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED))
- && (value & (1 << (length - 1))))
- value -= 1 << length;
-#else
- /* FIXME: unfinished */
-#endif
+ /* Read the base part of the insn. */
+
+ status = (*info->read_memory_func) (pc - ((!big_p && (pc & 3) != 0) ? 2 : 0),
+ buf, buflen, info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, pc, info);
+ return -1;
+ }
+
+ /* 32 bit insn? */
+ x = (big_p ? &buf[0] : &buf[3]);
+ if ((pc & 3) == 0 && (*x & 0x80) != 0)
+ return print_insn (cd, pc, info, buf, buflen);
+
+ /* Print the first insn. */
+ if ((pc & 3) == 0)
+ {
+ buf += (big_p ? 0 : 2);
+ if (print_insn (cd, pc, info, buf, 2) == 0)
+ (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
+ buf += (big_p ? 2 : -2);
+ }
- /* This is backwards as we undo the effects of insert_normal. */
- if (shift < 0)
- value >>= -shift;
+ x = (big_p ? &buf[0] : &buf[1]);
+ if (*x & 0x80)
+ {
+ /* Parallel. */
+ (*info->fprintf_func) (info->stream, " || ");
+ *x &= 0x7f;
+ }
else
- value <<= shift;
+ (*info->fprintf_func) (info->stream, " -> ");
+
+ /* The "& 3" is to pass a consistent address.
+ Parallel insns arguably both begin on the word boundary.
+ Also, branch insns are calculated relative to the word boundary. */
+ if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0)
+ (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
- * valuep = value;
- return 1;
+ return (pc & 3) ? 2 : 4;
}
+/* -- */
+
+void m32r_cgen_print_operand
+ (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
+
+/* Main entry point for printing operands.
+ XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
+ of dis-asm.h on cgen.h.
+
+ This function is basically just a big switch statement. Earlier versions
+ used tables to look up the function to use, but
+ - if the table contains both assembler and disassembler functions then
+ the disassembler contains much of the assembler and vice-versa,
+ - there's a lot of inlining possibilities as things grow,
+ - using a switch statement avoids the function call overhead.
+
+ This function could be moved into `print_insn_normal', but keeping it
+ separate makes clear the interface between `print_insn_normal' and each of
+ the handlers. */
+
+void
+m32r_cgen_print_operand (CGEN_CPU_DESC cd,
+ int opindex,
+ void * xinfo,
+ CGEN_FIELDS *fields,
+ void const *attrs ATTRIBUTE_UNUSED,
+ bfd_vma pc,
+ int length)
+{
+ disassemble_info *info = (disassemble_info *) xinfo;
+
+ switch (opindex)
+ {
+ case M32R_OPERAND_ACC :
+ print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_acc, 0);
+ break;
+ case M32R_OPERAND_ACCD :
+ print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accd, 0);
+ break;
+ case M32R_OPERAND_ACCS :
+ print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accs, 0);
+ break;
+ case M32R_OPERAND_DCR :
+ print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r1, 0);
+ break;
+ case M32R_OPERAND_DISP16 :
+ print_address (cd, info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
+ break;
+ case M32R_OPERAND_DISP24 :
+ print_address (cd, info, fields->f_disp24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
+ break;
+ case M32R_OPERAND_DISP8 :
+ print_address (cd, info, fields->f_disp8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
+ break;
+ case M32R_OPERAND_DR :
+ print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
+ break;
+ case M32R_OPERAND_HASH :
+ print_hash (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
+ break;
+ case M32R_OPERAND_HI16 :
+ print_normal (cd, info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
+ break;
+ case M32R_OPERAND_IMM1 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_imm1, 0, pc, length);
+ break;
+ case M32R_OPERAND_SCR :
+ print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r2, 0);
+ break;
+ case M32R_OPERAND_SIMM16 :
+ print_signed_with_hash_prefix (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
+ break;
+ case M32R_OPERAND_SIMM8 :
+ print_signed_with_hash_prefix (cd, info, fields->f_simm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
+ break;
+ case M32R_OPERAND_SLO16 :
+ print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
+ break;
+ case M32R_OPERAND_SR :
+ print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
+ break;
+ case M32R_OPERAND_SRC1 :
+ print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
+ break;
+ case M32R_OPERAND_SRC2 :
+ print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
+ break;
+ case M32R_OPERAND_UIMM16 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_uimm16, 0, pc, length);
+ break;
+ case M32R_OPERAND_UIMM24 :
+ print_address (cd, info, fields->f_uimm24, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
+ break;
+ case M32R_OPERAND_UIMM3 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_uimm3, 0, pc, length);
+ break;
+ case M32R_OPERAND_UIMM4 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_uimm4, 0, pc, length);
+ break;
+ case M32R_OPERAND_UIMM5 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_uimm5, 0, pc, length);
+ break;
+ case M32R_OPERAND_UIMM8 :
+ print_unsigned_with_hash_prefix (cd, info, fields->f_uimm8, 0, pc, length);
+ break;
+ case M32R_OPERAND_ULO16 :
+ print_normal (cd, info, fields->f_uimm16, 0, pc, length);
+ break;
+
+ default :
+ /* xgettext:c-format */
+ opcodes_error_handler
+ (_("internal error: unrecognized field %d while printing insn"),
+ opindex);
+ abort ();
+ }
+}
+
+cgen_print_fn * const m32r_cgen_print_handlers[] =
+{
+ print_insn_normal,
+};
+
+
+void
+m32r_cgen_init_dis (CGEN_CPU_DESC cd)
+{
+ m32r_cgen_init_opcode_table (cd);
+ m32r_cgen_init_ibld_table (cd);
+ cd->print_handlers = & m32r_cgen_print_handlers[0];
+ cd->print_operand = m32r_cgen_print_operand;
+}
+
+\f
/* Default print handler. */
static void
-print_normal (dis_info, value, attrs, pc, length)
- void * dis_info;
- long value;
- unsigned int attrs;
- unsigned long pc; /* FIXME: should be bfd_vma */
- int length;
+print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void *dis_info,
+ long value,
+ unsigned int attrs,
+ bfd_vma pc ATTRIBUTE_UNUSED,
+ int length ATTRIBUTE_UNUSED)
{
- disassemble_info * info = dis_info;
+ disassemble_info *info = (disassemble_info *) dis_info;
/* Print the operand as directed by the attributes. */
- if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_FAKE))
- ; /* nothing to do (??? at least not yet) */
- else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_PCREL_ADDR))
- (*info->print_address_func) (pc + CGEN_PCREL_OFFSET + value, info);
- /* ??? Not all cases of this are currently caught. */
- else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_ABS_ADDR))
- /* FIXME: Why & 0xffffffff? */
- (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
- else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED))
- (*info->fprintf_func) (info->stream, "0x%lx", value);
- else
+ if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
+ ; /* nothing to do */
+ else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
(*info->fprintf_func) (info->stream, "%ld", value);
+ else
+ (*info->fprintf_func) (info->stream, "0x%lx", value);
}
-/* Keyword print handler. */
+/* Default address handler. */
static void
-print_keyword (dis_info, keyword_table, value, attrs)
- void * dis_info;
- CGEN_KEYWORD * keyword_table;
- long value;
- CGEN_ATTR * attrs;
+print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void *dis_info,
+ bfd_vma value,
+ unsigned int attrs,
+ bfd_vma pc ATTRIBUTE_UNUSED,
+ int length ATTRIBUTE_UNUSED)
{
- disassemble_info * info = dis_info;
- const CGEN_KEYWORD_ENTRY * ke;
+ disassemble_info *info = (disassemble_info *) dis_info;
- ke = cgen_keyword_lookup_value (keyword_table, value);
- info->fprintf_func (info->stream, "%s", ke == NULL ? "???" : ke->name);
+ /* Print the operand as directed by the attributes. */
+ if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
+ ; /* Nothing to do. */
+ else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
+ (*info->print_address_func) (value, info);
+ else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
+ (*info->print_address_func) (value, info);
+ else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
+ (*info->fprintf_func) (info->stream, "%ld", (long) value);
+ else
+ (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
}
-\f
-/* -- disassembler routines inserted here */
-\f
-/* Default insn extractor.
- The extracted fields are stored in DIS_FLDS.
- BUF_CTRL is used to handle reading variable length insns (FIXME: not done).
- Return the length of the insn in bits, or 0 if no match. */
+/* Keyword print handler. */
-static int
-extract_insn_normal (insn, buf_ctrl, insn_value, fields)
- const CGEN_INSN * insn;
- void * buf_ctrl;
- cgen_insn_t insn_value;
- CGEN_FIELDS * fields;
+static void
+print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ void *dis_info,
+ CGEN_KEYWORD *keyword_table,
+ long value,
+ unsigned int attrs ATTRIBUTE_UNUSED)
{
- const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn);
- const unsigned char * syn;
+ disassemble_info *info = (disassemble_info *) dis_info;
+ const CGEN_KEYWORD_ENTRY *ke;
- CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
-
- CGEN_INIT_EXTRACT ();
-
- for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
- {
- int length;
-
- if (CGEN_SYNTAX_CHAR_P (* syn))
- continue;
-
- length = m32r_cgen_extract_operand (CGEN_SYNTAX_FIELD (* syn),
- buf_ctrl, insn_value, fields);
- if (length == 0)
- return 0;
- }
-
- /* We recognized and successfully extracted this insn. */
- return CGEN_INSN_BITSIZE (insn);
+ ke = cgen_keyword_lookup_value (keyword_table, value);
+ if (ke != NULL)
+ (*info->fprintf_func) (info->stream, "%s", ke->name);
+ else
+ (*info->fprintf_func) (info->stream, "???");
}
-
+\f
/* Default insn printer.
DIS_INFO is defined as `void *' so the disassembler needn't know anything
- about disassemble_info.
-*/
+ about disassemble_info. */
static void
-print_insn_normal (dis_info, insn, fields, pc, length)
- void * dis_info;
- const CGEN_INSN * insn;
- CGEN_FIELDS * fields;
- bfd_vma pc;
- int length;
+print_insn_normal (CGEN_CPU_DESC cd,
+ void *dis_info,
+ const CGEN_INSN *insn,
+ CGEN_FIELDS *fields,
+ bfd_vma pc,
+ int length)
{
- const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn);
- disassemble_info * info = dis_info;
- const unsigned char * syn;
+ const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+ disassemble_info *info = (disassemble_info *) dis_info;
+ const CGEN_SYNTAX_CHAR_TYPE *syn;
- CGEN_INIT_PRINT ();
+ CGEN_INIT_PRINT (cd);
- for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
+ for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
{
- if (CGEN_SYNTAX_MNEMONIC_P (* syn))
+ if (CGEN_SYNTAX_MNEMONIC_P (*syn))
{
- info->fprintf_func (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
+ (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
continue;
}
- if (CGEN_SYNTAX_CHAR_P (* syn))
+ if (CGEN_SYNTAX_CHAR_P (*syn))
{
- info->fprintf_func (info->stream, "%c", CGEN_SYNTAX_CHAR (* syn));
+ (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
continue;
}
/* We have an operand. */
- m32r_cgen_print_operand (CGEN_SYNTAX_FIELD (* syn), info,
- fields, CGEN_INSN_ATTRS (insn), pc, length);
+ m32r_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
+ fields, CGEN_INSN_ATTRS (insn), pc, length);
}
}
\f
-/* Default value for CGEN_PRINT_INSN.
- Given BUFLEN bytes (target byte order) read into BUF, look up the
- insn in the instruction table and disassemble it.
-
- The result is the size of the insn in bytes. */
-
-#ifndef CGEN_PRINT_INSN
-#define CGEN_PRINT_INSN print_insn
-#endif
+/* Subroutine of print_insn. Reads an insn into the given buffers and updates
+ the extract info.
+ Returns 0 if all is well, non-zero otherwise. */
static int
-print_insn (pc, info, buf, buflen)
- bfd_vma pc;
- disassemble_info * info;
- char * buf;
- int buflen;
+read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
+ bfd_vma pc,
+ disassemble_info *info,
+ bfd_byte *buf,
+ int buflen,
+ CGEN_EXTRACT_INFO *ex_info,
+ unsigned long *insn_value)
{
- int i;
- unsigned long insn_value;
- const CGEN_INSN_LIST * insn_list;
- int extra_bytes;
-
- switch (buflen)
+ int status = (*info->read_memory_func) (pc, buf, buflen, info);
+
+ if (status != 0)
{
- case 8:
- insn_value = buf[0];
- break;
- case 16:
- insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
- break;
- case 32:
- insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
- break;
- default:
- abort ();
+ (*info->memory_error_func) (status, pc, info);
+ return -1;
}
- /* Special case - a 32 bit instruction which is actually two 16 bit instructions
- being executed in parallel. */
- if (buflen == 32
- && (pc & 0x3) == 0
- && ((insn_value & 0x80008000) == 0x00008000))
- {
- if (info->endian == BFD_ENDIAN_BIG)
- {
- static char buf2 [4];
-
- print_insn (pc, info, buf, 16);
-
- info->fprintf_func (info->stream, " || ");
-
- buf2 [0] = buf [2] & ~ 0x80;
- buf2 [1] = buf [3];
- buf2 [2] = 0;
- buf2 [3] = 0;
- buf = buf2;
-
- insn_value <<= 17;
- insn_value >>= 1;
- }
- else
- {
- print_insn (pc, info, buf + 2, 16);
+ ex_info->dis_info = info;
+ ex_info->valid = (1 << buflen) - 1;
+ ex_info->insn_bytes = buf;
- info->fprintf_func (info->stream, " || ");
+ *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
+ return 0;
+}
- insn_value &= 0x7fff;
- }
+/* Utility to print an insn.
+ BUF is the base part of the insn, target byte order, BUFLEN bytes long.
+ The result is the size of the insn in bytes or zero for an unknown insn
+ or -1 if an error occurs fetching data (memory_error_func will have
+ been called). */
+
+static int
+print_insn (CGEN_CPU_DESC cd,
+ bfd_vma pc,
+ disassemble_info *info,
+ bfd_byte *buf,
+ unsigned int buflen)
+{
+ CGEN_INSN_INT insn_value;
+ const CGEN_INSN_LIST *insn_list;
+ CGEN_EXTRACT_INFO ex_info;
+ int basesize;
+
+ /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
+ basesize = cd->base_insn_bitsize < buflen * 8 ?
+ cd->base_insn_bitsize : buflen * 8;
+ insn_value = cgen_get_insn_value (cd, buf, basesize);
+
+
+ /* Fill in ex_info fields like read_insn would. Don't actually call
+ read_insn, since the incoming buffer is already read (and possibly
+ modified a la m32r). */
+ ex_info.valid = (1 << buflen) - 1;
+ ex_info.dis_info = info;
+ ex_info.insn_bytes = buf;
- pc += 2;
- extra_bytes = 2;
- }
- else
- extra_bytes = 0;
-
/* The instructions are stored in hash lists.
Pick the first one and keep trying until we find the right one. */
- insn_list = CGEN_DIS_LOOKUP_INSN (buf, insn_value);
-
+ insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
while (insn_list != NULL)
{
- const CGEN_INSN * insn = insn_list->insn;
- unsigned long value;
+ const CGEN_INSN *insn = insn_list->insn;
+ CGEN_FIELDS fields;
+ int length;
+ unsigned long insn_value_cropped;
-#if 0 /* not needed as insn shouldn't be in hash lists if not supported */
+#ifdef CGEN_VALIDATE_INSN_SUPPORTED
+ /* Not needed as insn shouldn't be in hash lists if not supported. */
/* Supported by this cpu? */
- if (! m32r_cgen_insn_supported (insn))
- continue;
+ if (! m32r_cgen_insn_supported (cd, insn))
+ {
+ insn_list = CGEN_DIS_NEXT_INSN (insn_list);
+ continue;
+ }
#endif
- /* If we are looking at a 16 bit insn we may have to adjust the value being examined. */
- value = insn_value;
- if (CGEN_INSN_BITSIZE (insn) == 16)
- {
- /* If this is a big endian target,
- and we have read 32 bits for the instruction value,
- then we must examine the top 16 bits, not the bottom. */
- if (buflen == 32 && info->endian == BFD_ENDIAN_BIG)
- value >>= 16;
- }
-
/* Basic bit mask must be correct. */
/* ??? May wish to allow target to defer this check until the extract
handler. */
- if ((value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
+
+ /* Base size may exceed this instruction's size. Extract the
+ relevant part from the buffer. */
+ if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
+ (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
+ insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
+ info->endian == BFD_ENDIAN_BIG);
+ else
+ insn_value_cropped = insn_value;
+
+ if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
+ == CGEN_INSN_BASE_VALUE (insn))
{
- CGEN_FIELDS fields;
- int length;
-
/* Printing is handled in two passes. The first pass parses the
machine insn and extracts the fields. The second pass prints
them. */
- length = CGEN_EXTRACT_FN (insn) (insn, NULL, value, & fields);
+ /* Make sure the entire insn is loaded into insn_value, if it
+ can fit. */
+ if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
+ (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
+ {
+ unsigned long full_insn_value;
+ int rc = read_insn (cd, pc, info, buf,
+ CGEN_INSN_BITSIZE (insn) / 8,
+ & ex_info, & full_insn_value);
+ if (rc != 0)
+ return rc;
+ length = CGEN_EXTRACT_FN (cd, insn)
+ (cd, insn, &ex_info, full_insn_value, &fields, pc);
+ }
+ else
+ length = CGEN_EXTRACT_FN (cd, insn)
+ (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
+
+ /* Length < 0 -> error. */
+ if (length < 0)
+ return length;
if (length > 0)
{
- CGEN_PRINT_FN (insn) (info, insn, & fields, pc, length);
-
- /* length is in bits, result is in bytes */
- return (length / 8) + extra_bytes;
+ CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
+ /* Length is in bits, result is in bytes. */
+ return length / 8;
}
}
-
+
insn_list = CGEN_DIS_NEXT_INSN (insn_list);
}
- return extra_bytes;
+ return 0;
+}
+
+/* Default value for CGEN_PRINT_INSN.
+ The result is the size of the insn in bytes or zero for an unknown insn
+ or -1 if an error occured fetching bytes. */
+
+#ifndef CGEN_PRINT_INSN
+#define CGEN_PRINT_INSN default_print_insn
+#endif
+
+static int
+default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
+{
+ bfd_byte buf[CGEN_MAX_INSN_SIZE];
+ int buflen;
+ int status;
+
+ /* Attempt to read the base part of the insn. */
+ buflen = cd->base_insn_bitsize / 8;
+ status = (*info->read_memory_func) (pc, buf, buflen, info);
+
+ /* Try again with the minimum part, if min < base. */
+ if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
+ {
+ buflen = cd->min_insn_bitsize / 8;
+ status = (*info->read_memory_func) (pc, buf, buflen, info);
+ }
+
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, pc, info);
+ return -1;
+ }
+
+ return print_insn (cd, pc, info, buf, buflen);
}
/* Main entry point.
Print one instruction from PC on INFO->STREAM.
Return the size of the instruction (in bytes). */
+typedef struct cpu_desc_list
+{
+ struct cpu_desc_list *next;
+ CGEN_BITSET *isa;
+ int mach;
+ int endian;
+ CGEN_CPU_DESC cd;
+} cpu_desc_list;
+
int
-print_insn_m32r (pc, info)
- bfd_vma pc;
- disassemble_info * info;
+print_insn_m32r (bfd_vma pc, disassemble_info *info)
{
- char buffer [CGEN_MAX_INSN_SIZE];
- int status;
- int length;
- static int initialized = 0;
- static int current_mach = 0;
- static int current_bigend = 0;
- int mach = info->mach;
- int bigend = info->endian == BFD_ENDIAN_BIG;
-
- /* If we haven't initialized yet, or if we've switched cpu's, initialize. */
- if (!initialized || mach != current_mach || bigend != current_bigend)
- {
- initialized = 1;
- current_mach = mach;
- current_bigend = bigend;
-
- m32r_cgen_init_dis (mach, bigend ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE);
- }
+ static cpu_desc_list *cd_list = 0;
+ cpu_desc_list *cl = 0;
+ static CGEN_CPU_DESC cd = 0;
+ static CGEN_BITSET *prev_isa;
+ static int prev_mach;
+ static int prev_endian;
+ int length;
+ CGEN_BITSET *isa;
+ int mach;
+ int endian = (info->endian == BFD_ENDIAN_BIG
+ ? CGEN_ENDIAN_BIG
+ : CGEN_ENDIAN_LITTLE);
+ enum bfd_architecture arch;
+
+ /* ??? gdb will set mach but leave the architecture as "unknown" */
+#ifndef CGEN_BFD_ARCH
+#define CGEN_BFD_ARCH bfd_arch_m32r
+#endif
+ arch = info->arch;
+ if (arch == bfd_arch_unknown)
+ arch = CGEN_BFD_ARCH;
+
+ /* There's no standard way to compute the machine or isa number
+ so we leave it to the target. */
+#ifdef CGEN_COMPUTE_MACH
+ mach = CGEN_COMPUTE_MACH (info);
+#else
+ mach = info->mach;
+#endif
- /* Read enough of the insn so we can look it up in the hash lists. */
+#ifdef CGEN_COMPUTE_ISA
+ {
+ static CGEN_BITSET *permanent_isa;
- status = info->read_memory_func (pc, buffer, CGEN_BASE_INSN_SIZE, info);
- if (status != 0)
+ if (!permanent_isa)
+ permanent_isa = cgen_bitset_create (MAX_ISAS);
+ isa = permanent_isa;
+ cgen_bitset_clear (isa);
+ cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
+ }
+#else
+ isa = info->private_data;
+#endif
+
+ /* If we've switched cpu's, try to find a handle we've used before */
+ if (cd
+ && (cgen_bitset_compare (isa, prev_isa) != 0
+ || mach != prev_mach
+ || endian != prev_endian))
{
- /* Try reading a 16 bit instruction. */
- info->bytes_per_chunk = 2;
- status = info->read_memory_func (pc, buffer, CGEN_BASE_INSN_SIZE / 2, info);
- buffer [2] = buffer [3] = 0;
+ cd = 0;
+ for (cl = cd_list; cl; cl = cl->next)
+ {
+ if (cgen_bitset_compare (cl->isa, isa) == 0 &&
+ cl->mach == mach &&
+ cl->endian == endian)
+ {
+ cd = cl->cd;
+ prev_isa = cd->isas;
+ break;
+ }
+ }
}
- if (status != 0)
+
+ /* If we haven't initialized yet, initialize the opcode table. */
+ if (! cd)
{
- info->memory_error_func (status, pc, info);
- return -1;
+ const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
+ const char *mach_name;
+
+ if (!arch_type)
+ abort ();
+ mach_name = arch_type->printable_name;
+
+ prev_isa = cgen_bitset_copy (isa);
+ prev_mach = mach;
+ prev_endian = endian;
+ cd = m32r_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
+ CGEN_CPU_OPEN_BFDMACH, mach_name,
+ CGEN_CPU_OPEN_ENDIAN, prev_endian,
+ CGEN_CPU_OPEN_END);
+ if (!cd)
+ abort ();
+
+ /* Save this away for future reference. */
+ cl = xmalloc (sizeof (struct cpu_desc_list));
+ cl->cd = cd;
+ cl->isa = prev_isa;
+ cl->mach = mach;
+ cl->endian = endian;
+ cl->next = cd_list;
+ cd_list = cl;
+
+ m32r_cgen_init_dis (cd);
}
/* We try to have as much common code as possible.
/* ??? Some targets may need a hook elsewhere. Try to avoid this,
but if not possible try to move this hook elsewhere rather than
have two hooks. */
- length = CGEN_PRINT_INSN (pc, info, buffer, CGEN_BASE_INSN_BITSIZE);
-
- if (length)
+ length = CGEN_PRINT_INSN (cd, pc, info);
+ if (length > 0)
return length;
+ if (length < 0)
+ return -1;
- info->fprintf_func (info->stream, UNKNOWN_INSN_MSG);
-
- return CGEN_DEFAULT_INSN_SIZE;
+ (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
+ return cd->default_insn_bitsize / 8;
}
-
-/* Get the generate machine specific code. */
-#include "m32r-dis.in"
projects / deliverable / binutils-gdb.git / blobdiff