diff options
| -rw-r--r-- | opcodes/ChangeLog | 5 | ||||
| -rw-r--r-- | opcodes/cgen-asm.in | 309 | ||||
| -rw-r--r-- | opcodes/cgen-dis.in | 388 | ||||
| -rw-r--r-- | opcodes/cgen-ibld.in | 570 | ||||
| -rw-r--r-- | opcodes/cgen.sh | 134 |
5 files changed, 1406 insertions, 0 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index d4af2a2..574d60d 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,8 @@ +2000-08-04 Ben Elliston <bje@redhat.com> + + * cgen-dis.in, cgen-asm.in, cgen-ibld.in: New files. + * cgen.sh: Likewise. + 2000-08-02 Jim Wilson <wilson@cygnus.com> * ia64-dis.c (print_insn_ia64): Call ia64_free_opcode at end. diff --git a/opcodes/cgen-asm.in b/opcodes/cgen-asm.in new file mode 100644 index 0000000..8abd8de --- /dev/null +++ b/opcodes/cgen-asm.in @@ -0,0 +1,309 @@ +/* Assembler interface for targets using CGEN. -*- C -*- + CGEN: Cpu tools GENerator + +THIS FILE IS MACHINE GENERATED WITH CGEN. +- the resultant file is machine generated, cgen-asm.in isn't + +Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + +This file is part of the GNU Binutils and GDB, the GNU debugger. + +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 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. + +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. */ + +/* ??? Eventually more and more of this stuff can go to cpu-independent files. + Keep that in mind. */ + +#include "sysdep.h" +#include <ctype.h> +#include <stdio.h> +#include "ansidecl.h" +#include "bfd.h" +#include "symcat.h" +#include "@prefix@-desc.h" +#include "@prefix@-opc.h" +#include "opintl.h" + +#undef min +#define min(a,b) ((a) < (b) ? (a) : (b)) +#undef max +#define max(a,b) ((a) > (b) ? (a) : (b)) + +static const char * parse_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)); + +/* -- assembler routines inserted here */ + +/* Default insn parser. + + The syntax string is scanned and operands are parsed and stored in FIELDS. + Relocs are queued as we go via other callbacks. + + ??? Note that this is currently an all-or-nothing parser. If we fail to + parse the instruction, we return 0 and the caller will start over from + the beginning. Backtracking will be necessary in parsing subexpressions, + but that can be handled there. Not handling backtracking here may get + expensive in the case of the m68k. Deal with later. + + Returns NULL for success, an error message for failure. +*/ + +static const char * +parse_insn_normal (cd, insn, strp, fields) + CGEN_CPU_DESC cd; + const CGEN_INSN *insn; + const char **strp; + CGEN_FIELDS *fields; +{ + /* ??? Runtime added insns not handled yet. */ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + const char *str = *strp; + const char *errmsg; + const char *p; + const unsigned char * syn; +#ifdef CGEN_MNEMONIC_OPERANDS + /* FIXME: wip */ + int past_opcode_p; +#endif + + /* For now we assume the mnemonic is first (there are no leading operands). + We can parse it without needing to set up operand parsing. + GAS's input scrubber will ensure mnemonics are lowercase, but we may + not be called from GAS. */ + p = CGEN_INSN_MNEMONIC (insn); + while (*p && tolower (*p) == tolower (*str)) + ++p, ++str; + + if (* p) + return _("unrecognized instruction"); + +#ifndef CGEN_MNEMONIC_OPERANDS + if (* str && !isspace (* str)) + return _("unrecognized instruction"); +#endif + + CGEN_INIT_PARSE (cd); + cgen_init_parse_operand (cd); +#ifdef CGEN_MNEMONIC_OPERANDS + past_opcode_p = 0; +#endif + + /* We don't check for (*str != '\0') here because we want to parse + any trailing fake arguments in the syntax string. */ + syn = CGEN_SYNTAX_STRING (syntax); + + /* Mnemonics come first for now, ensure valid string. */ + if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) + abort (); + + ++syn; + + while (* syn != 0) + { + /* Non operand chars must match exactly. */ + if (CGEN_SYNTAX_CHAR_P (* syn)) + { + /* FIXME: While we allow for non-GAS callers above, we assume the + first char after the mnemonic part is a space. */ + /* FIXME: We also take inappropriate advantage of the fact that + GAS's input scrubber will remove extraneous blanks. */ + if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn))) + { +#ifdef CGEN_MNEMONIC_OPERANDS + if (* syn == ' ') + past_opcode_p = 1; +#endif + ++ syn; + ++ str; + } + else + { + /* Syntax char didn't match. Can't be this insn. */ + static char msg [80]; + /* xgettext:c-format */ + sprintf (msg, _("syntax error (expected char `%c', found `%c')"), + *syn, *str); + return msg; + } + continue; + } + + /* We have an operand of some sort. */ + errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), + &str, fields); + if (errmsg) + return errmsg; + + /* Done with this operand, continue with next one. */ + ++ syn; + } + + /* If we're at the end of the syntax string, we're done. */ + if (* syn == '\0') + { + /* FIXME: For the moment we assume a valid `str' can only contain + blanks now. IE: We needn't try again with a longer version of + the insn and it is assumed that longer versions of insns appear + before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ + while (isspace (* str)) + ++ str; + + if (* str != '\0') + return _("junk at end of line"); /* FIXME: would like to include `str' */ + + return NULL; + } + + /* We couldn't parse it. */ + return _("unrecognized instruction"); +} + +/* Main entry point. + This routine is called for each instruction to be assembled. + STR points to the insn to be assembled. + We assume all necessary tables have been initialized. + The assembled instruction, less any fixups, is stored in BUF. + Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value + still needs to be converted to target byte order, otherwise BUF is an array + of bytes in target byte order. + The result is a pointer to the insn's entry in the opcode table, + or NULL if an error occured (an error message will have already been + printed). + + Note that when processing (non-alias) macro-insns, + this function recurses. + + ??? It's possible to make this cpu-independent. + One would have to deal with a few minor things. + At this point in time doing so would be more of a curiosity than useful + [for example this file isn't _that_ big], but keeping the possibility in + mind helps keep the design clean. */ + +const CGEN_INSN * +@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg) + CGEN_CPU_DESC cd; + const char *str; + CGEN_FIELDS *fields; + CGEN_INSN_BYTES_PTR buf; + char **errmsg; +{ + const char *start; + CGEN_INSN_LIST *ilist; + const char *tmp_errmsg = NULL; + + /* Skip leading white space. */ + while (isspace (* str)) + ++ str; + + /* The instructions are stored in hashed lists. + Get the first in the list. */ + ilist = CGEN_ASM_LOOKUP_INSN (cd, str); + + /* Keep looking until we find a match. */ + + start = str; + for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) + { + const CGEN_INSN *insn = ilist->insn; + +#ifdef CGEN_VALIDATE_INSN_SUPPORTED + /* not usually needed as unsupported opcodes shouldn't be in the hash lists */ + /* Is this insn supported by the selected cpu? */ + if (! @arch@_cgen_insn_supported (cd, insn)) + continue; +#endif + + /* If the RELAX attribute is set, this is an insn that shouldn't be + chosen immediately. Instead, it is used during assembler/linker + relaxation if possible. */ + if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0) + continue; + + str = start; + + /* Allow parse/insert handlers to obtain length of insn. */ + CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); + + tmp_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); + if (tmp_errmsg != NULL) + continue; + + /* ??? 0 is passed for `pc' */ + tmp_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, + (bfd_vma) 0); + if (tmp_errmsg != NULL) + continue; + + /* It is up to the caller to actually output the insn and any + queued relocs. */ + return insn; + } + + /* Make sure we leave this with something at this point. */ + if (tmp_errmsg == NULL) + tmp_errmsg = "unknown mnemonic"; + + { + static char errbuf[150]; + +#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS + /* if verbose error messages, use errmsg from CGEN_PARSE_FN */ + if (strlen (start) > 50) + /* xgettext:c-format */ + sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); + else + /* xgettext:c-format */ + sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); +#else + if (strlen (start) > 50) + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s...'"), start); + else + /* xgettext:c-format */ + sprintf (errbuf, _("bad instruction `%.50s'"), start); +#endif + + *errmsg = errbuf; + return NULL; + } +} + +#if 0 /* This calls back to GAS which we can't do without care. */ + +/* Record each member of OPVALS in the assembler's symbol table. + This lets GAS parse registers for us. + ??? Interesting idea but not currently used. */ + +/* Record each member of OPVALS in the assembler's symbol table. + FIXME: Not currently used. */ + +void +@arch@_cgen_asm_hash_keywords (cd, opvals) + CGEN_CPU_DESC cd; + CGEN_KEYWORD *opvals; +{ + CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); + const CGEN_KEYWORD_ENTRY * ke; + + while ((ke = cgen_keyword_search_next (& search)) != NULL) + { +#if 0 /* Unnecessary, should be done in the search routine. */ + if (! @arch@_cgen_opval_supported (ke)) + continue; +#endif + cgen_asm_record_register (cd, ke->name, ke->value); + } +} + +#endif /* 0 */ diff --git a/opcodes/cgen-dis.in b/opcodes/cgen-dis.in new file mode 100644 index 0000000..4b3faf9 --- /dev/null +++ b/opcodes/cgen-dis.in @@ -0,0 +1,388 @@ +/* Disassembler interface for targets using CGEN. -*- C -*- + CGEN: Cpu tools GENerator + +THIS FILE IS MACHINE GENERATED WITH CGEN. +- the resultant file is machine generated, cgen-dis.in isn't + +Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + +This file is part of the GNU Binutils and GDB, the GNU debugger. + +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 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. + +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. */ + +/* ??? 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 "bfd.h" +#include "symcat.h" +#include "@prefix@-desc.h" +#include "@prefix@-opc.h" +#include "opintl.h" + +/* Default text to print if an instruction isn't recognized. */ +#define UNKNOWN_INSN_MSG _("*unknown*") + +static void print_normal + PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int)); +static void print_address + PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); +static void print_keyword + PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); +static void print_insn_normal + PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, + bfd_vma, int)); +static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma, + disassemble_info *, char *, int)); +static int default_print_insn + PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *)); + +/* -- disassembler routines inserted here */ + +/* Default print handler. */ + +static void +print_normal (cd, dis_info, value, attrs, pc, length) +#ifdef CGEN_PRINT_NORMAL + CGEN_CPU_DESC cd; +#else + CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; +#endif + PTR dis_info; + long value; + unsigned int attrs; +#ifdef CGEN_PRINT_NORMAL + bfd_vma pc; + int length; +#else + bfd_vma pc ATTRIBUTE_UNUSED; + int length ATTRIBUTE_UNUSED; +#endif +{ + disassemble_info *info = (disassemble_info *) dis_info; + +#ifdef CGEN_PRINT_NORMAL + CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length); +#endif + + /* 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_SIGNED)) + (*info->fprintf_func) (info->stream, "%ld", value); + else + (*info->fprintf_func) (info->stream, "0x%lx", value); +} + +/* Default address handler. */ + +static void +print_address (cd, dis_info, value, attrs, pc, length) +#ifdef CGEN_PRINT_NORMAL + CGEN_CPU_DESC cd; +#else + CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; +#endif + PTR dis_info; + bfd_vma value; + unsigned int attrs; +#ifdef CGEN_PRINT_NORMAL + bfd_vma pc; + int length; +#else + bfd_vma pc ATTRIBUTE_UNUSED; + int length ATTRIBUTE_UNUSED; +#endif +{ + disassemble_info *info = (disassemble_info *) dis_info; + +#ifdef CGEN_PRINT_ADDRESS + CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length); +#endif + + /* 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); +} + +/* Keyword print handler. */ + +static void +print_keyword (cd, dis_info, keyword_table, value, attrs) + CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; + PTR dis_info; + CGEN_KEYWORD *keyword_table; + long value; + unsigned int attrs ATTRIBUTE_UNUSED; +{ + disassemble_info *info = (disassemble_info *) dis_info; + const CGEN_KEYWORD_ENTRY *ke; + + 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, "???"); +} + +/* Default insn printer. + + DIS_INFO is defined as `PTR' so the disassembler needn't know anything + about disassemble_info. */ + +static void +print_insn_normal (cd, dis_info, insn, fields, pc, length) + CGEN_CPU_DESC cd; + PTR 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 = (disassemble_info *) dis_info; + const unsigned char *syn; + + CGEN_INIT_PRINT (cd); + + for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) + { + if (CGEN_SYNTAX_MNEMONIC_P (*syn)) + { + (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); + continue; + } + if (CGEN_SYNTAX_CHAR_P (*syn)) + { + (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); + continue; + } + + /* We have an operand. */ + @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, + fields, CGEN_INSN_ATTRS (insn), pc, length); + } +} + +/* 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 (cd, pc, info, buf, buflen) + CGEN_CPU_DESC cd; + bfd_vma pc; + disassemble_info *info; + char *buf; + int buflen; +{ + unsigned long insn_value; + const CGEN_INSN_LIST *insn_list; + CGEN_EXTRACT_INFO ex_info; + + ex_info.dis_info = info; + ex_info.valid = (1 << (cd->base_insn_bitsize / 8)) - 1; + ex_info.insn_bytes = buf; + + switch (buflen) + { + case 1: + insn_value = buf[0]; + break; + case 2: + insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); + break; + case 4: + insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); + break; + default: + abort (); + } + + /* 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 (cd, buf, insn_value); + while (insn_list != NULL) + { + const CGEN_INSN *insn = insn_list->insn; + CGEN_FIELDS fields; + int length; + +#ifdef CGEN_VALIDATE_INSN_SUPPORTED + /* not needed as insn shouldn't be in hash lists if not supported */ + /* Supported by this cpu? */ + if (! @arch@_cgen_insn_supported (cd, insn)) + { + insn_list = CGEN_DIS_NEXT_INSN (insn_list); + continue; + } +#endif + + /* Basic bit mask must be correct. */ + /* ??? May wish to allow target to defer this check until the extract + handler. */ + if ((insn_value & CGEN_INSN_BASE_MASK (insn)) + == CGEN_INSN_BASE_VALUE (insn)) + { + /* 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 (cd, insn) + (cd, insn, &ex_info, insn_value, &fields, pc); + /* length < 0 -> error */ + if (length < 0) + return length; + if (length > 0) + { + 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 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 (cd, pc, info) + CGEN_CPU_DESC cd; + bfd_vma pc; + disassemble_info *info; +{ + char buf[CGEN_MAX_INSN_SIZE]; + int status; + + /* Read the base part of the insn. */ + + status = (*info->read_memory_func) (pc, buf, cd->base_insn_bitsize / 8, info); + if (status != 0) + { + (*info->memory_error_func) (status, pc, info); + return -1; + } + + return print_insn (cd, pc, info, buf, cd->base_insn_bitsize / 8); +} + +/* Main entry point. + Print one instruction from PC on INFO->STREAM. + Return the size of the instruction (in bytes). */ + +int +print_insn_@arch@ (pc, info) + bfd_vma pc; + disassemble_info *info; +{ + static CGEN_CPU_DESC cd = 0; + static int prev_isa; + static int prev_mach; + static int prev_endian; + int length; + int isa,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_@arch@ +#endif + arch = info->arch; + if (arch == bfd_arch_unknown) + arch = CGEN_BFD_ARCH; + + /* There's no standard way to compute the isa number (e.g. for arm thumb) + so we leave it to the target. */ +#ifdef CGEN_COMPUTE_ISA + isa = CGEN_COMPUTE_ISA (info); +#else + isa = 0; +#endif + + mach = info->mach; + + /* If we've switched cpu's, close the current table and open a new one. */ + if (cd + && (isa != prev_isa + || mach != prev_mach + || endian != prev_endian)) + { + @arch@_cgen_cpu_close (cd); + cd = 0; + } + + /* If we haven't initialized yet, initialize the opcode table. */ + if (! cd) + { + 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 = isa; + prev_mach = mach; + prev_endian = endian; + cd = @arch@_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 (); + @arch@_cgen_init_dis (cd); + } + + /* We try to have as much common code as possible. + But at this point some targets need to take over. */ + /* ??? 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 (cd, pc, info); + if (length > 0) + return length; + if (length < 0) + return -1; + + (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); + return cd->default_insn_bitsize / 8; +} diff --git a/opcodes/cgen-ibld.in b/opcodes/cgen-ibld.in new file mode 100644 index 0000000..6394fe0 --- /dev/null +++ b/opcodes/cgen-ibld.in @@ -0,0 +1,570 @@ +/* Instruction building/extraction support for @arch@. -*- C -*- + +THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator. +- the resultant file is machine generated, cgen-ibld.in isn't + +Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. + +This file is part of the GNU Binutils and GDB, the GNU debugger. + +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 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. + +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. */ + +/* ??? Eventually more and more of this stuff can go to cpu-independent files. + Keep that in mind. */ + +#include "sysdep.h" +#include <ctype.h> +#include <stdio.h> +#include "ansidecl.h" +#include "dis-asm.h" +#include "bfd.h" +#include "symcat.h" +#include "@prefix@-desc.h" +#include "@prefix@-opc.h" +#include "opintl.h" + +#undef min +#define min(a,b) ((a) < (b) ? (a) : (b)) +#undef max +#define max(a,b) ((a) > (b) ? (a) : (b)) + +/* Used by the ifield rtx function. */ +#define FLD(f) (fields->f) + +static const char * insert_normal + PARAMS ((CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int, + unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR)); +static const char * insert_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, + CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma)); + +static int extract_normal + PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, + unsigned int, unsigned int, unsigned int, unsigned int, + unsigned int, unsigned int, bfd_vma, long *)); +static int extract_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, + CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma)); + +/* Operand insertion. */ + +#if ! CGEN_INT_INSN_P + +/* Subroutine of insert_normal. */ + +static CGEN_INLINE void +insert_1 (cd, value, start, length, word_length, bufp) + CGEN_CPU_DESC cd; + unsigned long value; + int start,length,word_length; + unsigned char *bufp; +{ + unsigned long x,mask; + int shift; + int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; + + switch (word_length) + { + case 8: + x = *bufp; + break; + case 16: + if (big_p) + x = bfd_getb16 (bufp); + else + x = bfd_getl16 (bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); + else + x = bfd_getl16 (bufp) | (bufp[2] << 16); + break; + case 32: + if (big_p) + x = bfd_getb32 (bufp); + else + x = bfd_getl32 (bufp); + break; + default : + abort (); + } + + /* Written this way to avoid undefined behaviour. */ + mask = (((1L << (length - 1)) - 1) << 1) | 1; + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = (word_length - (start + length)); + x = (x & ~(mask << shift)) | ((value & mask) << shift); + + switch (word_length) + { + case 8: + *bufp = x; + break; + case 16: + if (big_p) + bfd_putb16 (x, bufp); + else + bfd_putl16 (x, bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + { + bufp[0] = x >> 16; + bfd_putb16 (x, bufp + 1); + } + else + { + bfd_putl16 (x, bufp); + bufp[2] = x >> 16; + } + break; + case 32: + if (big_p) + bfd_putb32 (x, bufp); + else + bfd_putl32 (x, bufp); + break; + default : + abort (); + } +} + +#endif /* ! CGEN_INT_INSN_P */ + +/* Default insertion routine. + + ATTRS is a mask of the boolean attributes. + WORD_OFFSET is the offset in bits from the start of the insn of the value. + WORD_LENGTH is the length of the word in bits in which the value resides. + START is the starting bit number in the word, architecture origin. + LENGTH is the length of VALUE in bits. + TOTAL_LENGTH is the total length of the insn in bits. + + The result is an error message or NULL if success. */ + +/* ??? This duplicates functionality with bfd's howto table and + bfd_install_relocation. */ +/* ??? This doesn't handle bfd_vma's. Create another function when + necessary. */ + +static const char * +insert_normal (cd, value, attrs, word_offset, start, length, word_length, + total_length, buffer) + CGEN_CPU_DESC cd; + long value; + unsigned int attrs; + unsigned int word_offset, start, length, word_length, total_length; + CGEN_INSN_BYTES_PTR buffer; +{ + static char errbuf[100]; + /* Written this way to avoid undefined behaviour. */ + unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; + + /* If LENGTH is zero, this operand doesn't contribute to the value. */ + if (length == 0) + return NULL; + + if (CGEN_INT_INSN_P + && word_offset != 0) + abort (); + + if (word_length > 32) + abort (); + + /* For architectures with insns smaller than the base-insn-bitsize, + word_length may be too big. */ + if (cd->min_insn_bitsize < cd->base_insn_bitsize) + { + if (word_offset == 0 + && word_length > total_length) + word_length = total_length; + } + + /* Ensure VALUE will fit. */ + if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)) + { + unsigned long maxval = mask; + + if ((unsigned long) value > maxval) + { + /* xgettext:c-format */ + sprintf (errbuf, + _("operand out of range (%lu not between 0 and %lu)"), + value, maxval); + return errbuf; + } + } + else + { + if (! cgen_signed_overflow_ok_p (cd)) + { + long minval = - (1L << (length - 1)); + long maxval = (1L << (length - 1)) - 1; + + if (value < minval || value > maxval) + { + sprintf + /* xgettext:c-format */ + (errbuf, _("operand out of range (%ld not between %ld and %ld)"), + value, minval, maxval); + return errbuf; + } + } + } + +#if CGEN_INT_INSN_P + + { + int shift; + + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = word_length - (start + length); + *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift); + } + +#else /* ! CGEN_INT_INSN_P */ + + { + unsigned char *bufp = (unsigned char *) buffer + word_offset / 8; + + insert_1 (cd, value, start, length, word_length, bufp); + } + +#endif /* ! CGEN_INT_INSN_P */ + + return NULL; +} + +/* Default insn builder (insert handler). + The instruction is recorded in CGEN_INT_INSN_P byte order + (meaning that if CGEN_INT_INSN_P BUFFER is an int * and thus the value is + recorded in host byte order, otherwise BUFFER is an array of bytes and the + value is recorded in target byte order). + The result is an error message or NULL if success. */ + +static const char * +insert_insn_normal (cd, insn, fields, buffer, pc) + CGEN_CPU_DESC cd; + const CGEN_INSN * insn; + CGEN_FIELDS * fields; + CGEN_INSN_BYTES_PTR buffer; + bfd_vma pc; +{ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + unsigned long value; + const unsigned char * syn; + + CGEN_INIT_INSERT (cd); + value = CGEN_INSN_BASE_VALUE (insn); + + /* If we're recording insns as numbers (rather than a string of bytes), + target byte order handling is deferred until later. */ + +#if CGEN_INT_INSN_P + + *buffer = value; + +#else + + cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize, + CGEN_FIELDS_BITSIZE (fields)), + value); + +#endif /* ! CGEN_INT_INSN_P */ + + /* ??? It would be better to scan the format's fields. + Still need to be able to insert a value based on the operand though; + e.g. storing a branch displacement that got resolved later. + Needs more thought first. */ + + for (syn = CGEN_SYNTAX_STRING (syntax); * syn != '\0'; ++ syn) + { + const char *errmsg; + + if (CGEN_SYNTAX_CHAR_P (* syn)) + continue; + + errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn), + fields, buffer, pc); + if (errmsg) + return errmsg; + } + + return NULL; +} + +/* Operand extraction. */ + +#if ! CGEN_INT_INSN_P + +/* Subroutine of extract_normal. + Ensure sufficient bytes are cached in EX_INFO. + OFFSET is the offset in bytes from the start of the insn of the value. + BYTES is the length of the needed value. + Returns 1 for success, 0 for failure. */ + +static CGEN_INLINE int +fill_cache (cd, ex_info, offset, bytes, pc) + CGEN_CPU_DESC cd; + CGEN_EXTRACT_INFO *ex_info; + int offset, bytes; + bfd_vma pc; +{ + /* It's doubtful that the middle part has already been fetched so + we don't optimize that case. kiss. */ + int mask; + disassemble_info *info = (disassemble_info *) ex_info->dis_info; + + /* First do a quick check. */ + mask = (1 << bytes) - 1; + if (((ex_info->valid >> offset) & mask) == mask) + return 1; + + /* Search for the first byte we need to read. */ + for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) + if (! (mask & ex_info->valid)) + break; + + if (bytes) + { + int status; + + pc += offset; + status = (*info->read_memory_func) + (pc, ex_info->insn_bytes + offset, bytes, info); + + if (status != 0) + { + (*info->memory_error_func) (status, pc, info); + return 0; + } + + ex_info->valid |= ((1 << bytes) - 1) << offset; + } + + return 1; +} + +/* Subroutine of extract_normal. */ + +static CGEN_INLINE long +extract_1 (cd, ex_info, start, length, word_length, bufp, pc) + CGEN_CPU_DESC cd; + CGEN_EXTRACT_INFO *ex_info; + int start,length,word_length; + unsigned char *bufp; + bfd_vma pc; +{ + unsigned long x,mask; + int shift; + int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; + + switch (word_length) + { + case 8: + x = *bufp; + break; + case 16: + if (big_p) + x = bfd_getb16 (bufp); + else + x = bfd_getl16 (bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); + else + x = bfd_getl16 (bufp) | (bufp[2] << 16); + break; + case 32: + if (big_p) + x = bfd_getb32 (bufp); + else + x = bfd_getl32 (bufp); + break; + default : + abort (); + } + + /* Written this way to avoid undefined behaviour. */ + mask = (((1L << (length - 1)) - 1) << 1) | 1; + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = (word_length - (start + length)); + return (x >> shift) & mask; +} + +#endif /* ! CGEN_INT_INSN_P */ + +/* Default extraction routine. + + INSN_VALUE is the first base_insn_bitsize bits of the insn in host order, + or sometimes less for cases like the m32r where the base insn size is 32 + but some insns are 16 bits. + ATTRS is a mask of the boolean attributes. We only need `SIGNED', + but for generality we take a bitmask of all of them. + WORD_OFFSET is the offset in bits from the start of the insn of the value. + WORD_LENGTH is the length of the word in bits in which the value resides. + START is the starting bit number in the word, architecture origin. + LENGTH is the length of VALUE in bits. + TOTAL_LENGTH is the total length of the insn in bits. + + Returns 1 for success, 0 for failure. */ + +/* ??? The return code isn't properly used. wip. */ + +/* ??? This doesn't handle bfd_vma's. Create another function when + necessary. */ + +static int +extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length, + word_length, total_length, pc, valuep) + CGEN_CPU_DESC cd; +#if ! CGEN_INT_INSN_P + CGEN_EXTRACT_INFO *ex_info; +#else + CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED; +#endif + CGEN_INSN_INT insn_value; + unsigned int attrs; + unsigned int word_offset, start, length, word_length, total_length; +#if ! CGEN_INT_INSN_P + bfd_vma pc; +#else + bfd_vma pc ATTRIBUTE_UNUSED; +#endif + long *valuep; +{ + CGEN_INSN_INT value; + + /* If LENGTH is zero, this operand doesn't contribute to the value + so give it a standard value of zero. */ + if (length == 0) + { + *valuep = 0; + return 1; + } + + if (CGEN_INT_INSN_P + && word_offset != 0) + abort (); + + if (word_length > 32) + abort (); + + /* For architectures with insns smaller than the insn-base-bitsize, + word_length may be too big. */ + if (cd->min_insn_bitsize < cd->base_insn_bitsize) + { + if (word_offset == 0 + && word_length > total_length) + word_length = total_length; + } + + /* Does the value reside in INSN_VALUE? */ + + if (word_offset == 0) + { + /* Written this way to avoid undefined behaviour. */ + CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; + + if (CGEN_INSN_LSB0_P) + value = insn_value >> ((start + 1) - length); + else + value = insn_value >> (word_length - (start + length)); + value &= mask; + /* sign extend? */ + if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED) + && (value & (1L << (length - 1)))) + value |= ~mask; + } + +#if ! CGEN_INT_INSN_P + + else + { + unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; + + if (word_length > 32) + abort (); + + if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0) + return 0; + + value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc); + } + +#endif /* ! CGEN_INT_INSN_P */ + + *valuep = value; + + return 1; +} + +/* Default insn extractor. + + INSN_VALUE is the first base_insn_bitsize bits, translated to host order. + The extracted fields are stored in FIELDS. + EX_INFO is used to handle reading variable length insns. + Return the length of the insn in bits, or 0 if no match, + or -1 if an error occurs fetching data (memory_error_func will have + been called). */ + +static int +extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc) + CGEN_CPU_DESC cd; + const CGEN_INSN *insn; + CGEN_EXTRACT_INFO *ex_info; + CGEN_INSN_INT insn_value; + CGEN_FIELDS *fields; + bfd_vma pc; +{ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + const unsigned char *syn; + + CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); + + CGEN_INIT_EXTRACT (cd); + + for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) + { + int length; + + if (CGEN_SYNTAX_CHAR_P (*syn)) + continue; + + length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn), + ex_info, insn_value, fields, pc); + if (length <= 0) + return length; + } + + /* We recognized and successfully extracted this insn. */ + return CGEN_INSN_BITSIZE (insn); +} + +/* machine generated code added here */ diff --git a/opcodes/cgen.sh b/opcodes/cgen.sh new file mode 100644 index 0000000..8a4eb6b --- /dev/null +++ b/opcodes/cgen.sh @@ -0,0 +1,134 @@ +#! /bin/sh +# Generate CGEN opcode files: arch-desc.[ch], arch-opc.[ch], +# arch-asm.c, arch-dis.c, arch-opinst.c, arch-ibld.[ch]. +# +# Usage: +# cgen.sh action srcdir cgen cgendir cgenflags arch prefix options +# +# ACTION is currently always "opcodes". It exists to be consistent with the +# simulator. +# OPTIONS is comma separated list of options: +# - opinst - arch-opinst.c is being made, causes semantic analysis +# +# We store the generated files in the source directory until we decide to +# ship a Scheme interpreter (or other implementation) with gdb/binutils. +# Maybe we never will. + +# We want to behave like make, any error forces us to stop. +set -e + +action=$1 +srcdir=$2 +cgen=$3 +cgendir=$4 +cgenflags=$5 +arch=$6 +prefix=$7 +options=$8 + +# List of extra files to build. +# Values: opinst (only 1 extra file at present) +extrafiles=$9 + +rootdir=${srcdir}/.. + +# $arch is $6, as passed on the command line. +# $ARCH is the same argument but in all uppercase. +# Both forms are used in this script. + +lowercase='abcdefghijklmnopqrstuvwxyz' +uppercase='ABCDEFGHIJKLMNOPQRSTUVWXYZ' +ARCH=`echo ${arch} | tr "${lowercase}" "${uppercase}"` + +extrafile_args="" +for ef in .. $extrafiles +do + case $ef in + ..) ;; + opinst) extrafile_args="-Q tmp-opinst.c1 $extrafile_args" ;; + esac +done + +case $action in +opcodes) + # Remove residual working files. + rm -f tmp-desc.h tmp-desc.h1 + rm -f tmp-desc.c tmp-desc.c1 + rm -f tmp-opc.h tmp-opc.h1 + rm -f tmp-opc.c tmp-opc.c1 + rm -f tmp-opinst.c tmp-opinst.c1 + rm -f tmp-ibld.h tmp-ibld.h1 + rm -f tmp-ibld.c tmp-ibld.in1 + rm -f tmp-asm.c tmp-asm.in1 + rm -f tmp-dis.c tmp-dis.in1 + + # Run CGEN. + ${cgen} -s ${cgendir}/cgen-opc.scm \ + -s ${cgendir} \ + ${cgenflags} \ + -f "${options}" \ + -m all \ + -a ${arch} \ + -H tmp-desc.h1 \ + -C tmp-desc.c1 \ + -O tmp-opc.h1 \ + -P tmp-opc.c1 \ + -L tmp-ibld.in1 \ + -A tmp-asm.in1 \ + -D tmp-dis.in1 \ + ${extrafile_args} + + # Customise generated files for the particular architecture. + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" < tmp-desc.h1 > tmp-desc.h + ${rootdir}/move-if-change tmp-desc.h ${srcdir}/${prefix}-desc.h + + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" < tmp-desc.c1 > tmp-desc.c + ${rootdir}/move-if-change tmp-desc.c ${srcdir}/${prefix}-desc.c + + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" < tmp-opc.h1 > tmp-opc.h + ${rootdir}/move-if-change tmp-opc.h ${srcdir}/${prefix}-opc.h + + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" < tmp-opc.c1 > tmp-opc.c + ${rootdir}/move-if-change tmp-opc.c ${srcdir}/${prefix}-opc.c + + case $extrafiles in + *opinst*) + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" < tmp-opinst.c1 >tmp-opinst.c + ${rootdir}/move-if-change tmp-opinst.c ${srcdir}/${prefix}-opinst.c + ;; + esac + + cat ${srcdir}/cgen-ibld.in tmp-ibld.in1 | \ + sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" > tmp-ibld.c + ${rootdir}/move-if-change tmp-ibld.c ${srcdir}/${prefix}-ibld.c + + sed -e "/ -- assembler routines/ r tmp-asm.in1" ${srcdir}/cgen-asm.in \ + | sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" > tmp-asm.c + ${rootdir}/move-if-change tmp-asm.c ${srcdir}/${prefix}-asm.c + + sed -e "/ -- disassembler routines/ r tmp-dis.in1" ${srcdir}/cgen-dis.in \ + | sed -e "s/@ARCH@/${ARCH}/g" -e "s/@arch@/${arch}/g" \ + -e "s/@prefix@/${prefix}/" > tmp-dis.c + ${rootdir}/move-if-change tmp-dis.c ${srcdir}/${prefix}-dis.c + + # Remove temporary files. + rm -f tmp-desc.h1 tmp-desc.c1 + rm -f tmp-opc.h1 tmp-opc.c1 + rm -f tmp-opinst.c1 + rm -f tmp-ibld.h1 tmp-ibld.in1 + rm -f tmp-asm.in1 tmp-dis.in1 + ;; + +*) + echo "$0: bad action: ${action}" >&2 + exit 1 + ;; + +esac + +exit 0 |