| /* LoongArch opcode support. |
| Copyright (C) 2021-2024 Free Software Foundation, Inc. |
| Contributed by Loongson Ltd. |
| |
| This file is part of the GNU opcodes library. |
| |
| 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; see the file COPYING3. If not, |
| see <http://www.gnu.org/licenses/>. */ |
| |
| #include "sysdep.h" |
| #include "disassemble.h" |
| #include "opintl.h" |
| #include "opcode/loongarch.h" |
| #include "libiberty.h" |
| #include <stdlib.h> |
| |
| static bool loongarch_dis_show_aliases = true; |
| static const char *const *loongarch_r_disname = NULL; |
| static const char *const *loongarch_f_disname = NULL; |
| static const char *const *loongarch_fc_disname = NULL; |
| static const char *const *loongarch_c_disname = NULL; |
| static const char *const *loongarch_cr_disname = NULL; |
| static const char *const *loongarch_v_disname = NULL; |
| static const char *const *loongarch_x_disname = NULL; |
| |
| static const struct loongarch_opcode * |
| get_loongarch_opcode_by_binfmt (insn_t insn) |
| { |
| const struct loongarch_opcode *it; |
| struct loongarch_ase *ase; |
| size_t i; |
| for (ase = loongarch_ASEs; ase->enabled; ase++) |
| { |
| if (!*ase->enabled || (ase->include && !*ase->include) |
| || (ase->exclude && *ase->exclude)) |
| continue; |
| |
| if (!ase->opc_htab_inited) |
| { |
| for (it = ase->opcodes; it->mask; it++) |
| if (!ase->opc_htab[LARCH_INSN_OPC (it->match)] |
| && it->macro == NULL |
| && (!(it->pinfo & INSN_DIS_ALIAS) |
| || loongarch_dis_show_aliases)) |
| ase->opc_htab[LARCH_INSN_OPC (it->match)] = it; |
| for (i = 0; i < 16; i++) |
| if (!ase->opc_htab[i]) |
| ase->opc_htab[i] = it; |
| ase->opc_htab_inited = 1; |
| } |
| |
| it = ase->opc_htab[LARCH_INSN_OPC (insn)]; |
| for (; it->name; it++) |
| if ((insn & it->mask) == it->match && it->mask |
| && !(it->include && !*it->include) |
| && !(it->exclude && *it->exclude)) |
| return it; |
| } |
| return NULL; |
| } |
| |
| static void |
| set_default_loongarch_dis_options (void) |
| { |
| LARCH_opts.ase_ilp32 = 1; |
| LARCH_opts.ase_lp64 = 1; |
| LARCH_opts.ase_sf = 1; |
| LARCH_opts.ase_df = 1; |
| LARCH_opts.ase_lsx = 1; |
| LARCH_opts.ase_lasx = 1; |
| LARCH_opts.ase_lvz = 1; |
| LARCH_opts.ase_lbt = 1; |
| |
| loongarch_r_disname = loongarch_r_alias; |
| loongarch_f_disname = loongarch_f_alias; |
| loongarch_fc_disname = loongarch_fc_normal_name; |
| loongarch_c_disname = loongarch_c_normal_name; |
| loongarch_cr_disname = loongarch_cr_normal_name; |
| loongarch_v_disname = loongarch_v_normal_name; |
| loongarch_x_disname = loongarch_x_normal_name; |
| } |
| |
| static int |
| parse_loongarch_dis_option (const char *option) |
| { |
| if (strcmp (option, "no-aliases") == 0) |
| loongarch_dis_show_aliases = false; |
| |
| if (strcmp (option, "numeric") == 0) |
| { |
| loongarch_r_disname = loongarch_r_normal_name; |
| loongarch_f_disname = loongarch_f_normal_name; |
| } |
| return -1; |
| } |
| |
| static int |
| parse_loongarch_dis_options (const char *opts_in) |
| { |
| set_default_loongarch_dis_options (); |
| |
| if (opts_in == NULL) |
| return 0; |
| |
| char *opts, *opt, *opt_end; |
| opts = xmalloc (strlen (opts_in) + 1); |
| strcpy (opts, opts_in); |
| |
| for (opt = opt_end = opts; opt_end != NULL; opt = opt_end + 1) |
| { |
| if ((opt_end = strchr (opt, ',')) != NULL) |
| *opt_end = 0; |
| if (parse_loongarch_dis_option (opt) != 0) |
| return -1; |
| } |
| free (opts); |
| return 0; |
| } |
| |
| static int32_t |
| dis_one_arg (char esc1, char esc2, const char *bit_field, |
| const char *arg ATTRIBUTE_UNUSED, void *context) |
| { |
| static int need_comma = 0; |
| struct disassemble_info *info = context; |
| insn_t insn = *(insn_t *) info->private_data; |
| int32_t imm, u_imm; |
| enum disassembler_style style; |
| |
| if (esc1) |
| { |
| if (need_comma) |
| info->fprintf_styled_func (info->stream, dis_style_text, ", "); |
| need_comma = 1; |
| imm = loongarch_decode_imm (bit_field, insn, 1); |
| u_imm = loongarch_decode_imm (bit_field, insn, 0); |
| } |
| |
| switch (esc1) |
| { |
| case 'r': |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_r_disname[u_imm]); |
| break; |
| case 'f': |
| switch (esc2) |
| { |
| case 'c': |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_fc_disname[u_imm]); |
| break; |
| default: |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_f_disname[u_imm]); |
| } |
| break; |
| case 'c': |
| switch (esc2) |
| { |
| case 'r': |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_cr_disname[u_imm]); |
| break; |
| default: |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_c_disname[u_imm]); |
| } |
| break; |
| case 'v': |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_v_disname[u_imm]); |
| break; |
| case 'x': |
| info->fprintf_styled_func (info->stream, dis_style_register, "%s", loongarch_x_disname[u_imm]); |
| break; |
| case 'u': |
| style = esc2 == 'o' ? dis_style_address_offset : dis_style_immediate; |
| info->fprintf_styled_func (info->stream, style, "0x%x", u_imm); |
| break; |
| case 's': |
| switch (esc2) |
| { |
| case 'b': |
| case 'o': |
| /* Both represent address offsets. */ |
| style = dis_style_address_offset; |
| break; |
| default: |
| style = dis_style_immediate; |
| break; |
| } |
| info->fprintf_styled_func (info->stream, style, "%d", imm); |
| switch (esc2) |
| { |
| case 'b': |
| info->insn_type = dis_branch; |
| info->target += imm; |
| } |
| break; |
| case '\0': |
| need_comma = 0; |
| } |
| return 0; |
| } |
| |
| static void |
| disassemble_one (insn_t insn, struct disassemble_info *info) |
| { |
| const struct loongarch_opcode *opc = get_loongarch_opcode_by_binfmt (insn); |
| |
| #ifdef LOONGARCH_DEBUG |
| char have_space[32] = { 0 }; |
| insn_t t; |
| int i; |
| const char *t_f = opc ? opc->format : NULL; |
| if (t_f) |
| while (*t_f) |
| { |
| while (('a' <= t_f[0] && t_f[0] <= 'z') |
| || ('A' <= t_f[0] && t_f[0] <= 'Z') |
| || t_f[0] == ',') |
| t_f++; |
| while (1) |
| { |
| i = strtol (t_f, &t_f, 10); |
| have_space[i] = 1; |
| t_f++; /* ':' */ |
| i += strtol (t_f, &t_f, 10); |
| have_space[i] = 1; |
| if (t_f[0] == '|') |
| t_f++; |
| else |
| break; |
| } |
| if (t_f[0] == '<') |
| t_f += 2; /* '<' '<' */ |
| strtol (t_f, &t_f, 10); |
| } |
| |
| have_space[28] = 1; |
| have_space[0] = 0; |
| t = ~((insn_t) -1 >> 1); |
| for (i = 31; 0 <= i; i--) |
| { |
| if (t & insn) |
| info->fprintf_styled_func (info->stream, dis_style_text, "1"); |
| else |
| info->fprintf_styled_func (info->stream, dis_style_text, "0"); |
| if (have_space[i]) |
| info->fprintf_styled_func (info->stream, dis_style_text, " "); |
| t = t >> 1; |
| } |
| info->fprintf_styled_func (info->stream, dis_style_text, "\t"); |
| #endif |
| |
| if (!opc) |
| { |
| info->insn_type = dis_noninsn; |
| info->fprintf_styled_func (info->stream, dis_style_assembler_directive, ".word\t\t"); |
| info->fprintf_styled_func (info->stream, dis_style_immediate, "0x%08x", insn); |
| return; |
| } |
| |
| info->insn_type = dis_nonbranch; |
| if (opc->format == NULL || opc->format[0] == '\0') |
| info->fprintf_styled_func (info->stream, dis_style_mnemonic, |
| "%s", opc->name); |
| else |
| info->fprintf_styled_func (info->stream, dis_style_mnemonic, |
| "%-12s", opc->name); |
| |
| { |
| char *fake_args = xmalloc (strlen (opc->format) + 1); |
| const char *fake_arg_strs[MAX_ARG_NUM_PLUS_2]; |
| strcpy (fake_args, opc->format); |
| if (0 < loongarch_split_args_by_comma (fake_args, fake_arg_strs)) |
| info->fprintf_styled_func (info->stream, dis_style_text, "\t"); |
| info->private_data = &insn; |
| loongarch_foreach_args (opc->format, fake_arg_strs, dis_one_arg, info); |
| free (fake_args); |
| } |
| |
| if (info->insn_type == dis_branch || info->insn_type == dis_condbranch) |
| { |
| info->fprintf_styled_func (info->stream, dis_style_comment_start, "\t# "); |
| info->print_address_func (info->target, info); |
| } |
| } |
| |
| int |
| print_insn_loongarch (bfd_vma memaddr, struct disassemble_info *info) |
| { |
| insn_t insn; |
| int status; |
| |
| static int not_init_yet = 1; |
| if (not_init_yet) |
| { |
| parse_loongarch_dis_options (info->disassembler_options); |
| not_init_yet = 0; |
| } |
| |
| info->bytes_per_chunk = 4; |
| info->bytes_per_line = 4; |
| info->display_endian = BFD_ENDIAN_LITTLE; |
| info->insn_info_valid = 1; |
| info->target = memaddr; |
| |
| if ((status = info->read_memory_func (memaddr, (bfd_byte *) &insn, |
| sizeof (insn), info)) != 0) |
| { |
| info->memory_error_func (status, memaddr, info); |
| return -1; /* loongarch_insn_length (0); */ |
| } |
| |
| disassemble_one (insn, info); |
| |
| return loongarch_insn_length (insn); |
| } |
| |
| void |
| print_loongarch_disassembler_options (FILE *stream) |
| { |
| fprintf (stream, _("\n\ |
| The following LoongArch disassembler options are supported for use\n\ |
| with the -M switch (multiple options should be separated by commas):\n")); |
| |
| fprintf (stream, _("\n\ |
| no-aliases Use canonical instruction forms.\n")); |
| fprintf (stream, _("\n\ |
| numeric Print numeric register names, rather than ABI names.\n")); |
| fprintf (stream, _("\n")); |
| } |