/* 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 #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); } } /* 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 read_insn (cd, pc, info, buf, buflen, ex_info, insn_value) CGEN_CPU_DESC cd; bfd_vma pc; disassemble_info *info; char *buf; int buflen; CGEN_EXTRACT_INFO *ex_info; unsigned long *insn_value; { int status = (*info->read_memory_func) (pc, buf, buflen, info); if (status != 0) { (*info->memory_error_func) (status, pc, info); return -1; } ex_info->dis_info = info; ex_info->valid = (1 << buflen) - 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 (); } return 0; } /* 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; int rc = read_insn (cd, pc, info, buf, buflen, & ex_info, & insn_value); if (rc != 0) return rc; /* 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. */ #if CGEN_INT_INSN_P /* Make sure the entire insn is loaded into insn_value. */ if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) { 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 #endif 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; }