| /* 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) 1996-2016 Free Software Foundation, Inc. |
| |
| This file is part of libopcodes. |
| |
| 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. |
| |
| 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., |
| 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 "bfd.h" |
| #include "symcat.h" |
| #include "libiberty.h" |
| #include "or1k-desc.h" |
| #include "or1k-opc.h" |
| #include "opintl.h" |
| |
| /* Default text to print if an instruction isn't recognized. */ |
| #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 *); |
| |
| /* -- disassembler routines inserted here. */ |
| |
| |
| void or1k_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 |
| or1k_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 OR1K_OPERAND_DISP26 : |
| print_address (cd, info, fields->f_disp26, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); |
| break; |
| case OR1K_OPERAND_RA : |
| print_keyword (cd, info, & or1k_cgen_opval_h_gpr, fields->f_r2, 0); |
| break; |
| case OR1K_OPERAND_RADF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fdr, fields->f_r1, 0); |
| break; |
| case OR1K_OPERAND_RASF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fsr, fields->f_r2, 0); |
| break; |
| case OR1K_OPERAND_RB : |
| print_keyword (cd, info, & or1k_cgen_opval_h_gpr, fields->f_r3, 0); |
| break; |
| case OR1K_OPERAND_RBDF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fdr, fields->f_r1, 0); |
| break; |
| case OR1K_OPERAND_RBSF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fsr, fields->f_r3, 0); |
| break; |
| case OR1K_OPERAND_RD : |
| print_keyword (cd, info, & or1k_cgen_opval_h_gpr, fields->f_r1, 0); |
| break; |
| case OR1K_OPERAND_RDDF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fdr, fields->f_r1, 0); |
| break; |
| case OR1K_OPERAND_RDSF : |
| print_keyword (cd, info, & or1k_cgen_opval_h_fsr, fields->f_r1, 0); |
| break; |
| case OR1K_OPERAND_SIMM16 : |
| print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_SIGN_OPT), pc, length); |
| break; |
| case OR1K_OPERAND_SIMM16_SPLIT : |
| print_normal (cd, info, fields->f_simm16_split, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_SIGN_OPT)|(1<<CGEN_OPERAND_VIRTUAL), pc, length); |
| break; |
| case OR1K_OPERAND_UIMM16 : |
| print_normal (cd, info, fields->f_uimm16, 0, pc, length); |
| break; |
| case OR1K_OPERAND_UIMM16_SPLIT : |
| print_normal (cd, info, fields->f_uimm16_split, 0|(1<<CGEN_OPERAND_VIRTUAL), pc, length); |
| break; |
| case OR1K_OPERAND_UIMM6 : |
| print_normal (cd, info, fields->f_uimm6, 0, pc, length); |
| break; |
| |
| default : |
| /* xgettext:c-format */ |
| fprintf (stderr, _("Unrecognized field %d while printing insn.\n"), |
| opindex); |
| abort (); |
| } |
| } |
| |
| cgen_print_fn * const or1k_cgen_print_handlers[] = |
| { |
| print_insn_normal, |
| }; |
| |
| |
| void |
| or1k_cgen_init_dis (CGEN_CPU_DESC cd) |
| { |
| or1k_cgen_init_opcode_table (cd); |
| or1k_cgen_init_ibld_table (cd); |
| cd->print_handlers = & or1k_cgen_print_handlers[0]; |
| cd->print_operand = or1k_cgen_print_operand; |
| } |
| |
| |
| /* Default print handler. */ |
| |
| static void |
| 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 = (disassemble_info *) dis_info; |
| |
| /* 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 (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 = (disassemble_info *) dis_info; |
| |
| /* 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 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| void *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 `void *' so the disassembler needn't know anything |
| about disassemble_info. */ |
| |
| static void |
| 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 = (disassemble_info *) dis_info; |
| const CGEN_SYNTAX_CHAR_TYPE *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. */ |
| or1k_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 (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 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; |
| |
| *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); |
| 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 (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; |
| |
| /* 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, (char *) buf, insn_value); |
| while (insn_list != NULL) |
| { |
| const CGEN_INSN *insn = insn_list->insn; |
| CGEN_FIELDS fields; |
| int length; |
| unsigned long insn_value_cropped; |
| |
| #ifdef CGEN_VALIDATE_INSN_SUPPORTED |
| /* Not needed as insn shouldn't be in hash lists if not supported. */ |
| /* Supported by this cpu? */ |
| if (! or1k_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. */ |
| |
| /* 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)) |
| { |
| /* Printing is handled in two passes. The first pass parses the |
| machine insn and extracts the fields. The second pass prints |
| them. */ |
| |
| /* 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 (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 (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_or1k (bfd_vma pc, disassemble_info *info) |
| { |
| 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_or1k |
| #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 |
| |
| #ifdef CGEN_COMPUTE_ISA |
| { |
| static CGEN_BITSET *permanent_isa; |
| |
| 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->insn_sets; |
| #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)) |
| { |
| 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 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 = cgen_bitset_copy (isa); |
| prev_mach = mach; |
| prev_endian = endian; |
| cd = or1k_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; |
| |
| or1k_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; |
| } |