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- /* LoongArch opcode support.
- Copyright (C) 2021-2022 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 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)
- 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 const char *const *loongarch_r_disname = NULL;
- static const char *const *loongarch_f_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 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;
- loongarch_r_disname = loongarch_r_lp64_name;
- loongarch_f_disname = loongarch_f_lp64_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, "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;
- if (esc1)
- {
- if (need_comma)
- info->fprintf_func (info->stream, ", ");
- 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_func (info->stream, "%s", loongarch_r_disname[u_imm]);
- break;
- case 'f':
- info->fprintf_func (info->stream, "%s", loongarch_f_disname[u_imm]);
- break;
- case 'c':
- switch (esc2)
- {
- case 'r':
- info->fprintf_func (info->stream, "%s", loongarch_cr_disname[u_imm]);
- break;
- default:
- info->fprintf_func (info->stream, "%s", loongarch_c_disname[u_imm]);
- }
- break;
- case 'v':
- info->fprintf_func (info->stream, "%s", loongarch_v_disname[u_imm]);
- break;
- case 'x':
- info->fprintf_func (info->stream, "%s", loongarch_x_disname[u_imm]);
- break;
- case 'u':
- info->fprintf_func (info->stream, "0x%x", u_imm);
- break;
- case 's':
- if (imm == 0)
- info->fprintf_func (info->stream, "%d", imm);
- else
- info->fprintf_func (info->stream, "%d(0x%x)", imm, u_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_func (info->stream, "1");
- else
- info->fprintf_func (info->stream, "0");
- if (have_space[i])
- info->fprintf_func (info->stream, " ");
- t = t >> 1;
- }
- info->fprintf_func (info->stream, "\t");
- #endif
- if (!opc)
- {
- info->insn_type = dis_noninsn;
- info->fprintf_func (info->stream, "0x%08x", insn);
- return;
- }
- info->insn_type = dis_nonbranch;
- info->fprintf_func (info->stream, "%-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_func (info->stream, "\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
- /* Someother if we have extra info to print. */)
- info->fprintf_func (info->stream, "\t#");
- if (info->insn_type == dis_branch || info->insn_type == dis_condbranch)
- {
- info->fprintf_func (info->stream, " ");
- 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\
- numeric Print numeric register names, rather than ABI names.\n"));
- fprintf (stream, _("\n"));
- }
- int
- loongarch_parse_dis_options (const char *opts_in)
- {
- return parse_loongarch_dis_options (opts_in);
- }
- static void
- my_print_address_func (bfd_vma addr, struct disassemble_info *dinfo)
- {
- dinfo->fprintf_func (dinfo->stream, "0x%llx", (long long) addr);
- }
- void
- loongarch_disassemble_one (int64_t pc, insn_t insn,
- int (*fprintf_func) (void *stream,
- const char *format, ...),
- void *stream)
- {
- static struct disassemble_info my_disinfo =
- {
- .print_address_func = my_print_address_func,
- };
- static int not_init_yet = 1;
- if (not_init_yet)
- {
- loongarch_parse_dis_options (NULL);
- not_init_yet = 0;
- }
- my_disinfo.fprintf_func = fprintf_func;
- my_disinfo.stream = stream;
- my_disinfo.target = pc;
- disassemble_one (insn, &my_disinfo);
- }
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