f86f586366
opcodes * mcore-opc.h: Add const qualifiers. * microblaze-opc.h (struct op_code_struct): Likewise. * sh-opc.h: Likewise. * tic4x-dis.c (tic4x_print_indirect): Likewise. (tic4x_print_op): Likewise. include * opcode/dlx.h (struct dlx_opcode): Add const qualifiers. * opcode/h8300.h (struct h8_opcode): Likewise. * opcode/hppa.h (struct pa_opcode): Likewise. * opcode/msp430.h: Likewise. * opcode/spu.h (struct spu_opcode): Likewise. * opcode/tic30.h (struct _register): Likewise. * opcode/tic4x.h (struct tic4x_register): Likewise. (struct tic4x_cond): Likewise. (struct tic4x_indirect): Likewise. (struct tic4x_inst): Likewise. * opcode/visium.h (struct reg_entry): Likewise. gas * config/tc-arc.c: Add const qualifiers. * config/tc-h8300.c (md_begin): Likewise. * config/tc-ia64.c (print_prmask): Likewise. * config/tc-msp430.c (msp430_operands): Likewise. * config/tc-nds32.c (struct suffix_name): Likewise. (struct nds32_parse_option_table): Likewise. (struct nds32_set_option_table): Likewise. (do_pseudo_pushpopm): Likewise. (do_pseudo_pushpop_stack): Likewise. (nds32_relax_relocs): Likewise. (nds32_flag): Likewise. (struct nds32_hint_map): Likewise. (nds32_find_reloc_table): Likewise. (nds32_match_hint_insn): Likewise. * config/tc-s390.c: Likewise. * config/tc-sh.c (get_specific): Likewise. * config/tc-tic30.c: Likewise. * config/tc-tic4x.c (tic4x_inst_add): Likewise. (tic4x_indirect_parse): Likewise. * config/tc-vax.c (vax_cons): Likewise. * config/tc-z80.c (struct reg_entry): Likewise. * config/tc-epiphany.c (md_assemble): Adjust. (epiphany_assemble): New function. (epiphany_elf_section_rtn): Call do_align directly. (epiphany_elf_section_text): Likewise. * config/tc-ip2k.c (ip2k_elf_section_rtn): Likewise. (ip2k_elf_section_text): Likewise. * read.c (do_align): Make it not static. * read.h (do_align): New prototype.
3720 lines
94 KiB
C
3720 lines
94 KiB
C
/* tc-arc.c -- Assembler for the ARC
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Copyright (C) 1994-2016 Free Software Foundation, Inc.
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Contributor: Claudiu Zissulescu <claziss@synopsys.com>
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "as.h"
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#include "subsegs.h"
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#include "struc-symbol.h"
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#include "dwarf2dbg.h"
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#include "dw2gencfi.h"
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#include "safe-ctype.h"
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#include "opcode/arc.h"
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#include "elf/arc.h"
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/* Defines section. */
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#define MAX_INSN_FIXUPS 2
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#define MAX_CONSTR_STR 20
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#define FRAG_MAX_GROWTH 8
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#ifdef DEBUG
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# define pr_debug(fmt, args...) fprintf (stderr, fmt, ##args)
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#else
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# define pr_debug(fmt, args...)
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#endif
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#define MAJOR_OPCODE(x) (((x) & 0xF8000000) >> 27)
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#define SUB_OPCODE(x) (((x) & 0x003F0000) >> 16)
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#define LP_INSN(x) ((MAJOR_OPCODE (x) == 0x4) && \
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(SUB_OPCODE (x) == 0x28))
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/* Equal to MAX_PRECISION in atof-ieee.c. */
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#define MAX_LITTLENUMS 6
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/* Enum used to enumerate the relaxable ins operands. */
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enum rlx_operand_type
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{
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EMPTY = 0,
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REGISTER,
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REGISTER_S, /* Register for short instruction(s). */
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REGISTER_NO_GP, /* Is a register but not gp register specifically. */
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REGISTER_DUP, /* Duplication of previous operand of type register. */
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IMMEDIATE,
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BRACKET
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};
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enum arc_rlx_types
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{
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ARC_RLX_NONE = 0,
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ARC_RLX_BL_S,
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ARC_RLX_BL,
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ARC_RLX_B_S,
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ARC_RLX_B,
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ARC_RLX_ADD_U3,
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ARC_RLX_ADD_U6,
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ARC_RLX_ADD_LIMM,
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ARC_RLX_LD_U7,
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ARC_RLX_LD_S9,
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ARC_RLX_LD_LIMM,
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ARC_RLX_MOV_U8,
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ARC_RLX_MOV_S12,
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ARC_RLX_MOV_LIMM,
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ARC_RLX_SUB_U3,
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ARC_RLX_SUB_U6,
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ARC_RLX_SUB_LIMM,
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ARC_RLX_MPY_U6,
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ARC_RLX_MPY_LIMM,
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ARC_RLX_MOV_RU6,
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ARC_RLX_MOV_RLIMM,
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ARC_RLX_ADD_RRU6,
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ARC_RLX_ADD_RRLIMM,
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};
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/* Macros section. */
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#define regno(x) ((x) & 0x3F)
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#define is_ir_num(x) (((x) & ~0x3F) == 0)
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#define is_code_density_p(op) (((op)->subclass == CD1 || (op)->subclass == CD2))
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#define is_br_jmp_insn_p(op) (((op)->class == BRANCH || (op)->class == JUMP))
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#define is_kernel_insn_p(op) (((op)->class == KERNEL))
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/* Generic assembler global variables which must be defined by all
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targets. */
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/* Characters which always start a comment. */
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const char comment_chars[] = "#;";
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/* Characters which start a comment at the beginning of a line. */
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const char line_comment_chars[] = "#";
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/* Characters which may be used to separate multiple commands on a
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single line. */
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const char line_separator_chars[] = "`";
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/* Characters which are used to indicate an exponent in a floating
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point number. */
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const char EXP_CHARS[] = "eE";
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/* Chars that mean this number is a floating point constant
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As in 0f12.456 or 0d1.2345e12. */
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const char FLT_CHARS[] = "rRsSfFdD";
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/* Byte order. */
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extern int target_big_endian;
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const char *arc_target_format = DEFAULT_TARGET_FORMAT;
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static int byte_order = DEFAULT_BYTE_ORDER;
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/* By default relaxation is disabled. */
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static int relaxation_state = 0;
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extern int arc_get_mach (char *);
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/* Forward declarations. */
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static void arc_lcomm (int);
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static void arc_option (int);
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static void arc_extra_reloc (int);
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const pseudo_typeS md_pseudo_table[] =
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{
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/* Make sure that .word is 32 bits. */
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{ "word", cons, 4 },
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{ "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
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{ "lcomm", arc_lcomm, 0 },
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{ "lcommon", arc_lcomm, 0 },
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{ "cpu", arc_option, 0 },
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{ "tls_gd_ld", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_LD },
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{ "tls_gd_call", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_CALL },
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{ NULL, NULL, 0 }
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};
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const char *md_shortopts = "";
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enum options
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{
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OPTION_EB = OPTION_MD_BASE,
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OPTION_EL,
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OPTION_ARC600,
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OPTION_ARC601,
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OPTION_ARC700,
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OPTION_ARCEM,
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OPTION_ARCHS,
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OPTION_MCPU,
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OPTION_CD,
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OPTION_RELAX,
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/* The following options are deprecated and provided here only for
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compatibility reasons. */
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OPTION_USER_MODE,
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OPTION_LD_EXT_MASK,
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OPTION_SWAP,
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OPTION_NORM,
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OPTION_BARREL_SHIFT,
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OPTION_MIN_MAX,
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OPTION_NO_MPY,
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OPTION_EA,
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OPTION_MUL64,
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OPTION_SIMD,
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OPTION_SPFP,
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OPTION_DPFP,
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OPTION_XMAC_D16,
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OPTION_XMAC_24,
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OPTION_DSP_PACKA,
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OPTION_CRC,
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OPTION_DVBF,
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OPTION_TELEPHONY,
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OPTION_XYMEMORY,
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OPTION_LOCK,
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OPTION_SWAPE,
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OPTION_RTSC,
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OPTION_FPUDA
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};
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struct option md_longopts[] =
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{
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{ "EB", no_argument, NULL, OPTION_EB },
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{ "EL", no_argument, NULL, OPTION_EL },
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{ "mcpu", required_argument, NULL, OPTION_MCPU },
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{ "mA6", no_argument, NULL, OPTION_ARC600 },
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{ "mARC600", no_argument, NULL, OPTION_ARC600 },
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{ "mARC601", no_argument, NULL, OPTION_ARC601 },
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{ "mARC700", no_argument, NULL, OPTION_ARC700 },
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{ "mA7", no_argument, NULL, OPTION_ARC700 },
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{ "mEM", no_argument, NULL, OPTION_ARCEM },
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{ "mHS", no_argument, NULL, OPTION_ARCHS },
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{ "mcode-density", no_argument, NULL, OPTION_CD },
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{ "mrelax", no_argument, NULL, OPTION_RELAX },
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/* The following options are deprecated and provided here only for
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compatibility reasons. */
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{ "mav2em", no_argument, NULL, OPTION_ARCEM },
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{ "mav2hs", no_argument, NULL, OPTION_ARCHS },
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{ "muser-mode-only", no_argument, NULL, OPTION_USER_MODE },
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{ "mld-extension-reg-mask", required_argument, NULL, OPTION_LD_EXT_MASK },
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{ "mswap", no_argument, NULL, OPTION_SWAP },
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{ "mnorm", no_argument, NULL, OPTION_NORM },
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{ "mbarrel-shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
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{ "mbarrel_shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
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{ "mmin-max", no_argument, NULL, OPTION_MIN_MAX },
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{ "mmin_max", no_argument, NULL, OPTION_MIN_MAX },
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{ "mno-mpy", no_argument, NULL, OPTION_NO_MPY },
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{ "mea", no_argument, NULL, OPTION_EA },
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{ "mEA", no_argument, NULL, OPTION_EA },
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{ "mmul64", no_argument, NULL, OPTION_MUL64 },
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{ "msimd", no_argument, NULL, OPTION_SIMD},
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{ "mspfp", no_argument, NULL, OPTION_SPFP},
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{ "mspfp-compact", no_argument, NULL, OPTION_SPFP},
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{ "mspfp_compact", no_argument, NULL, OPTION_SPFP},
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{ "mspfp-fast", no_argument, NULL, OPTION_SPFP},
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{ "mspfp_fast", no_argument, NULL, OPTION_SPFP},
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{ "mdpfp", no_argument, NULL, OPTION_DPFP},
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{ "mdpfp-compact", no_argument, NULL, OPTION_DPFP},
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{ "mdpfp_compact", no_argument, NULL, OPTION_DPFP},
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{ "mdpfp-fast", no_argument, NULL, OPTION_DPFP},
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{ "mdpfp_fast", no_argument, NULL, OPTION_DPFP},
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{ "mmac-d16", no_argument, NULL, OPTION_XMAC_D16},
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{ "mmac_d16", no_argument, NULL, OPTION_XMAC_D16},
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{ "mmac-24", no_argument, NULL, OPTION_XMAC_24},
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{ "mmac_24", no_argument, NULL, OPTION_XMAC_24},
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{ "mdsp-packa", no_argument, NULL, OPTION_DSP_PACKA},
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{ "mdsp_packa", no_argument, NULL, OPTION_DSP_PACKA},
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{ "mcrc", no_argument, NULL, OPTION_CRC},
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{ "mdvbf", no_argument, NULL, OPTION_DVBF},
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{ "mtelephony", no_argument, NULL, OPTION_TELEPHONY},
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{ "mxy", no_argument, NULL, OPTION_XYMEMORY},
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{ "mlock", no_argument, NULL, OPTION_LOCK},
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{ "mswape", no_argument, NULL, OPTION_SWAPE},
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{ "mrtsc", no_argument, NULL, OPTION_RTSC},
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{ "mfpuda", no_argument, NULL, OPTION_FPUDA},
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{ NULL, no_argument, NULL, 0 }
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};
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size_t md_longopts_size = sizeof (md_longopts);
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/* Local data and data types. */
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/* Used since new relocation types are introduced in this
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file (DUMMY_RELOC_LITUSE_*). */
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typedef int extended_bfd_reloc_code_real_type;
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struct arc_fixup
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{
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expressionS exp;
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extended_bfd_reloc_code_real_type reloc;
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/* index into arc_operands. */
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unsigned int opindex;
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/* PC-relative, used by internals fixups. */
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unsigned char pcrel;
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/* TRUE if this fixup is for LIMM operand. */
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bfd_boolean islong;
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};
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struct arc_insn
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{
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unsigned int insn;
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int nfixups;
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struct arc_fixup fixups[MAX_INSN_FIXUPS];
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long limm;
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bfd_boolean short_insn; /* Boolean value: TRUE if current insn is
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short. */
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bfd_boolean has_limm; /* Boolean value: TRUE if limm field is
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valid. */
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bfd_boolean relax; /* Boolean value: TRUE if needs
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relaxation. */
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};
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/* Structure to hold any last two instructions. */
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static struct arc_last_insn
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{
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/* Saved instruction opcode. */
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const struct arc_opcode *opcode;
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/* Boolean value: TRUE if current insn is short. */
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bfd_boolean has_limm;
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/* Boolean value: TRUE if current insn has delay slot. */
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bfd_boolean has_delay_slot;
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} arc_last_insns[2];
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/* Forward declaration. */
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static void assemble_insn
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(const struct arc_opcode *, const expressionS *, int,
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const struct arc_flags *, int, struct arc_insn *);
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/* The cpu for which we are generating code. */
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static unsigned arc_target = ARC_OPCODE_BASE;
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static const char *arc_target_name = "<all>";
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static unsigned arc_features = 0x00;
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/* The default architecture. */
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static int arc_mach_type = bfd_mach_arc_arcv2;
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/* Non-zero if the cpu type has been explicitly specified. */
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static int mach_type_specified_p = 0;
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/* The hash table of instruction opcodes. */
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static struct hash_control *arc_opcode_hash;
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/* The hash table of register symbols. */
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static struct hash_control *arc_reg_hash;
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/* A table of CPU names and opcode sets. */
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static const struct cpu_type
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{
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const char *name;
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unsigned flags;
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int mach;
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unsigned eflags;
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unsigned features;
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}
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cpu_types[] =
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{
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{ "arc600", ARC_OPCODE_ARC600, bfd_mach_arc_arc600,
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E_ARC_MACH_ARC600, 0x00},
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{ "arc700", ARC_OPCODE_ARC700, bfd_mach_arc_arc700,
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E_ARC_MACH_ARC700, 0x00},
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{ "arcem", ARC_OPCODE_ARCv2EM, bfd_mach_arc_arcv2,
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EF_ARC_CPU_ARCV2EM, ARC_CD},
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{ "archs", ARC_OPCODE_ARCv2HS, bfd_mach_arc_arcv2,
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EF_ARC_CPU_ARCV2HS, ARC_CD},
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{ "all", ARC_OPCODE_BASE, bfd_mach_arc_arcv2,
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0x00, 0x00 },
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{ 0, 0, 0, 0, 0 }
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};
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/* Used by the arc_reloc_op table. Order is important. */
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#define O_gotoff O_md1 /* @gotoff relocation. */
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#define O_gotpc O_md2 /* @gotpc relocation. */
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#define O_plt O_md3 /* @plt relocation. */
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#define O_sda O_md4 /* @sda relocation. */
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#define O_pcl O_md5 /* @pcl relocation. */
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#define O_tlsgd O_md6 /* @tlsgd relocation. */
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#define O_tlsie O_md7 /* @tlsie relocation. */
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#define O_tpoff9 O_md8 /* @tpoff9 relocation. */
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#define O_tpoff O_md9 /* @tpoff relocation. */
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#define O_dtpoff9 O_md10 /* @dtpoff9 relocation. */
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#define O_dtpoff O_md11 /* @dtpoff relocation. */
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#define O_last O_dtpoff
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/* Used to define a bracket as operand in tokens. */
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#define O_bracket O_md32
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/* Dummy relocation, to be sorted out. */
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#define DUMMY_RELOC_ARC_ENTRY (BFD_RELOC_UNUSED + 1)
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#define USER_RELOC_P(R) ((R) >= O_gotoff && (R) <= O_last)
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|
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/* A table to map the spelling of a relocation operand into an appropriate
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bfd_reloc_code_real_type type. The table is assumed to be ordered such
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that op-O_literal indexes into it. */
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#define ARC_RELOC_TABLE(op) \
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(&arc_reloc_op[ ((!USER_RELOC_P (op)) \
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? (abort (), 0) \
|
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: (int) (op) - (int) O_gotoff) ])
|
|
|
|
#define DEF(NAME, RELOC, REQ) \
|
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{ #NAME, sizeof (#NAME)-1, O_##NAME, RELOC, REQ}
|
|
|
|
static const struct arc_reloc_op_tag
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|
{
|
|
/* String to lookup. */
|
|
const char *name;
|
|
/* Size of the string. */
|
|
size_t length;
|
|
/* Which operator to use. */
|
|
operatorT op;
|
|
extended_bfd_reloc_code_real_type reloc;
|
|
/* Allows complex relocation expression like identifier@reloc +
|
|
const. */
|
|
unsigned int complex_expr : 1;
|
|
}
|
|
arc_reloc_op[] =
|
|
{
|
|
DEF (gotoff, BFD_RELOC_ARC_GOTOFF, 1),
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DEF (gotpc, BFD_RELOC_ARC_GOTPC32, 0),
|
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DEF (plt, BFD_RELOC_ARC_PLT32, 0),
|
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DEF (sda, DUMMY_RELOC_ARC_ENTRY, 1),
|
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DEF (pcl, BFD_RELOC_ARC_PC32, 1),
|
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DEF (tlsgd, BFD_RELOC_ARC_TLS_GD_GOT, 0),
|
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DEF (tlsie, BFD_RELOC_ARC_TLS_IE_GOT, 0),
|
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DEF (tpoff9, BFD_RELOC_ARC_TLS_LE_S9, 0),
|
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DEF (tpoff, BFD_RELOC_ARC_TLS_LE_32, 1),
|
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DEF (dtpoff9, BFD_RELOC_ARC_TLS_DTPOFF_S9, 0),
|
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DEF (dtpoff, BFD_RELOC_ARC_TLS_DTPOFF, 0),
|
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};
|
|
|
|
static const int arc_num_reloc_op
|
|
= sizeof (arc_reloc_op) / sizeof (*arc_reloc_op);
|
|
|
|
/* Structure for relaxable instruction that have to be swapped with a
|
|
smaller alternative instruction. */
|
|
struct arc_relaxable_ins
|
|
{
|
|
/* Mnemonic that should be checked. */
|
|
const char *mnemonic_r;
|
|
|
|
/* Operands that should be checked.
|
|
Indexes of operands from operand array. */
|
|
enum rlx_operand_type operands[6];
|
|
|
|
/* Flags that should be checked. */
|
|
unsigned flag_classes[5];
|
|
|
|
/* Mnemonic (smaller) alternative to be used later for relaxation. */
|
|
const char *mnemonic_alt;
|
|
|
|
/* Index of operand that generic relaxation has to check. */
|
|
unsigned opcheckidx;
|
|
|
|
/* Base subtype index used. */
|
|
enum arc_rlx_types subtype;
|
|
};
|
|
|
|
#define RELAX_TABLE_ENTRY(BITS, ISSIGNED, SIZE, NEXT) \
|
|
{ (ISSIGNED) ? ((1 << ((BITS) - 1)) - 1) : ((1 << (BITS)) - 1), \
|
|
(ISSIGNED) ? -(1 << ((BITS) - 1)) : 0, \
|
|
(SIZE), \
|
|
(NEXT) } \
|
|
|
|
#define RELAX_TABLE_ENTRY_MAX(ISSIGNED, SIZE, NEXT) \
|
|
{ (ISSIGNED) ? 0x7FFFFFFF : 0xFFFFFFFF, \
|
|
(ISSIGNED) ? -(0x7FFFFFFF) : 0, \
|
|
(SIZE), \
|
|
(NEXT) } \
|
|
|
|
|
|
/* ARC relaxation table. */
|
|
const relax_typeS md_relax_table[] =
|
|
{
|
|
/* Fake entry. */
|
|
{0, 0, 0, 0},
|
|
|
|
/* BL_S s13 ->
|
|
BL s25. */
|
|
RELAX_TABLE_ENTRY(13, 1, 2, ARC_RLX_BL),
|
|
RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
|
|
|
|
/* B_S s10 ->
|
|
B s25. */
|
|
RELAX_TABLE_ENTRY(10, 1, 2, ARC_RLX_B),
|
|
RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
|
|
|
|
/* ADD_S c,b, u3 ->
|
|
ADD<.f> a,b,u6 ->
|
|
ADD<.f> a,b,limm. */
|
|
RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_ADD_U6),
|
|
RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_LIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
|
|
/* LD_S a, [b, u7] ->
|
|
LD<zz><.x><.aa><.di> a, [b, s9] ->
|
|
LD<zz><.x><.aa><.di> a, [b, limm] */
|
|
RELAX_TABLE_ENTRY(7, 0, 2, ARC_RLX_LD_S9),
|
|
RELAX_TABLE_ENTRY(9, 1, 4, ARC_RLX_LD_LIMM),
|
|
RELAX_TABLE_ENTRY_MAX(1, 8, ARC_RLX_NONE),
|
|
|
|
/* MOV_S b, u8 ->
|
|
MOV<.f> b, s12 ->
|
|
MOV<.f> b, limm. */
|
|
RELAX_TABLE_ENTRY(8, 0, 2, ARC_RLX_MOV_S12),
|
|
RELAX_TABLE_ENTRY(8, 0, 4, ARC_RLX_MOV_LIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
|
|
/* SUB_S c, b, u3 ->
|
|
SUB<.f> a, b, u6 ->
|
|
SUB<.f> a, b, limm. */
|
|
RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_SUB_U6),
|
|
RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_SUB_LIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
|
|
/* MPY<.f> a, b, u6 ->
|
|
MPY<.f> a, b, limm. */
|
|
RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MPY_LIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
|
|
/* MOV<.f><.cc> b, u6 ->
|
|
MOV<.f><.cc> b, limm. */
|
|
RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MOV_RLIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
|
|
/* ADD<.f><.cc> b, b, u6 ->
|
|
ADD<.f><.cc> b, b, limm. */
|
|
RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_RRLIMM),
|
|
RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
|
|
};
|
|
|
|
/* Order of this table's entries matters! */
|
|
const struct arc_relaxable_ins arc_relaxable_insns[] =
|
|
{
|
|
{ "bl", { IMMEDIATE }, { 0 }, "bl_s", 0, ARC_RLX_BL_S },
|
|
{ "b", { IMMEDIATE }, { 0 }, "b_s", 0, ARC_RLX_B_S },
|
|
{ "add", { REGISTER, REGISTER_DUP, IMMEDIATE }, { 5, 1, 0 }, "add",
|
|
2, ARC_RLX_ADD_RRU6},
|
|
{ "add", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "add_s", 2,
|
|
ARC_RLX_ADD_U3 },
|
|
{ "add", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "add", 2,
|
|
ARC_RLX_ADD_U6 },
|
|
{ "ld", { REGISTER_S, BRACKET, REGISTER_S, IMMEDIATE, BRACKET },
|
|
{ 0 }, "ld_s", 3, ARC_RLX_LD_U7 },
|
|
{ "ld", { REGISTER, BRACKET, REGISTER_NO_GP, IMMEDIATE, BRACKET },
|
|
{ 11, 4, 14, 17, 0 }, "ld", 3, ARC_RLX_LD_S9 },
|
|
{ "mov", { REGISTER_S, IMMEDIATE }, { 0 }, "mov_s", 1, ARC_RLX_MOV_U8 },
|
|
{ "mov", { REGISTER, IMMEDIATE }, { 5, 0 }, "mov", 1, ARC_RLX_MOV_S12 },
|
|
{ "mov", { REGISTER, IMMEDIATE }, { 5, 1, 0 },"mov", 1, ARC_RLX_MOV_RU6 },
|
|
{ "sub", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "sub_s", 2,
|
|
ARC_RLX_SUB_U3 },
|
|
{ "sub", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "sub", 2,
|
|
ARC_RLX_SUB_U6 },
|
|
{ "mpy", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "mpy", 2,
|
|
ARC_RLX_MPY_U6 },
|
|
};
|
|
|
|
const unsigned arc_num_relaxable_ins = ARRAY_SIZE (arc_relaxable_insns);
|
|
|
|
/* Flags to set in the elf header. */
|
|
static flagword arc_eflag = 0x00;
|
|
|
|
/* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
|
|
symbolS * GOT_symbol = 0;
|
|
|
|
/* Set to TRUE when we assemble instructions. */
|
|
static bfd_boolean assembling_insn = FALSE;
|
|
|
|
/* Functions implementation. */
|
|
|
|
/* Like md_number_to_chars but used for limms. The 4-byte limm value,
|
|
is encoded as 'middle-endian' for a little-endian target. FIXME!
|
|
this function is used for regular 4 byte instructions as well. */
|
|
|
|
static void
|
|
md_number_to_chars_midend (char *buf, valueT val, int n)
|
|
{
|
|
if (n == 4)
|
|
{
|
|
md_number_to_chars (buf, (val & 0xffff0000) >> 16, 2);
|
|
md_number_to_chars (buf + 2, (val & 0xffff), 2);
|
|
}
|
|
else
|
|
{
|
|
md_number_to_chars (buf, val, n);
|
|
}
|
|
}
|
|
|
|
/* Here ends all the ARCompact extension instruction assembling
|
|
stuff. */
|
|
|
|
static void
|
|
arc_extra_reloc (int r_type)
|
|
{
|
|
char *sym_name, c;
|
|
symbolS *sym, *lab = NULL;
|
|
|
|
if (*input_line_pointer == '@')
|
|
input_line_pointer++;
|
|
c = get_symbol_name (&sym_name);
|
|
sym = symbol_find_or_make (sym_name);
|
|
restore_line_pointer (c);
|
|
if (c == ',' && r_type == BFD_RELOC_ARC_TLS_GD_LD)
|
|
{
|
|
++input_line_pointer;
|
|
char *lab_name;
|
|
c = get_symbol_name (&lab_name);
|
|
lab = symbol_find_or_make (lab_name);
|
|
restore_line_pointer (c);
|
|
}
|
|
|
|
/* These relocations exist as a mechanism for the compiler to tell the
|
|
linker how to patch the code if the tls model is optimised. However,
|
|
the relocation itself does not require any space within the assembler
|
|
fragment, and so we pass a size of 0.
|
|
|
|
The lines that generate these relocations look like this:
|
|
|
|
.tls_gd_ld @.tdata`bl __tls_get_addr@plt
|
|
|
|
The '.tls_gd_ld @.tdata' is processed first and generates the
|
|
additional relocation, while the 'bl __tls_get_addr@plt' is processed
|
|
second and generates the additional branch.
|
|
|
|
It is possible that the additional relocation generated by the
|
|
'.tls_gd_ld @.tdata' will be attached at the very end of one fragment,
|
|
while the 'bl __tls_get_addr@plt' will be generated as the first thing
|
|
in the next fragment. This will be fine; both relocations will still
|
|
appear to be at the same address in the generated object file.
|
|
However, this only works as the additional relocation is generated
|
|
with size of 0 bytes. */
|
|
fixS *fixP
|
|
= fix_new (frag_now, /* Which frag? */
|
|
frag_now_fix (), /* Where in that frag? */
|
|
0, /* size: 1, 2, or 4 usually. */
|
|
sym, /* X_add_symbol. */
|
|
0, /* X_add_number. */
|
|
FALSE, /* TRUE if PC-relative relocation. */
|
|
r_type /* Relocation type. */);
|
|
fixP->fx_subsy = lab;
|
|
}
|
|
|
|
static symbolS *
|
|
arc_lcomm_internal (int ignore ATTRIBUTE_UNUSED,
|
|
symbolS *symbolP, addressT size)
|
|
{
|
|
addressT align = 0;
|
|
SKIP_WHITESPACE ();
|
|
|
|
if (*input_line_pointer == ',')
|
|
{
|
|
align = parse_align (1);
|
|
|
|
if (align == (addressT) -1)
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
if (size >= 8)
|
|
align = 3;
|
|
else if (size >= 4)
|
|
align = 2;
|
|
else if (size >= 2)
|
|
align = 1;
|
|
else
|
|
align = 0;
|
|
}
|
|
|
|
bss_alloc (symbolP, size, align);
|
|
S_CLEAR_EXTERNAL (symbolP);
|
|
|
|
return symbolP;
|
|
}
|
|
|
|
static void
|
|
arc_lcomm (int ignore)
|
|
{
|
|
symbolS *symbolP = s_comm_internal (ignore, arc_lcomm_internal);
|
|
|
|
if (symbolP)
|
|
symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
|
|
}
|
|
|
|
/* Select the cpu we're assembling for. */
|
|
|
|
static void
|
|
arc_option (int ignore ATTRIBUTE_UNUSED)
|
|
{
|
|
int mach = -1;
|
|
char c;
|
|
char *cpu;
|
|
|
|
c = get_symbol_name (&cpu);
|
|
mach = arc_get_mach (cpu);
|
|
|
|
if (mach == -1)
|
|
goto bad_cpu;
|
|
|
|
if (!mach_type_specified_p)
|
|
{
|
|
if ((!strcmp ("ARC600", cpu))
|
|
|| (!strcmp ("ARC601", cpu))
|
|
|| (!strcmp ("A6", cpu)))
|
|
{
|
|
md_parse_option (OPTION_MCPU, "arc600");
|
|
}
|
|
else if ((!strcmp ("ARC700", cpu))
|
|
|| (!strcmp ("A7", cpu)))
|
|
{
|
|
md_parse_option (OPTION_MCPU, "arc700");
|
|
}
|
|
else if (!strcmp ("EM", cpu))
|
|
{
|
|
md_parse_option (OPTION_MCPU, "arcem");
|
|
}
|
|
else if (!strcmp ("HS", cpu))
|
|
{
|
|
md_parse_option (OPTION_MCPU, "archs");
|
|
}
|
|
else
|
|
as_fatal ("could not find the architecture");
|
|
|
|
if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
|
|
as_fatal ("could not set architecture and machine");
|
|
}
|
|
else
|
|
if (arc_mach_type != mach)
|
|
as_warn ("Command-line value overrides \".cpu\" directive");
|
|
|
|
restore_line_pointer (c);
|
|
demand_empty_rest_of_line ();
|
|
return;
|
|
|
|
bad_cpu:
|
|
restore_line_pointer (c);
|
|
as_bad ("invalid identifier for \".cpu\"");
|
|
ignore_rest_of_line ();
|
|
}
|
|
|
|
/* Smartly print an expression. */
|
|
|
|
static void
|
|
debug_exp (expressionS *t)
|
|
{
|
|
const char *name ATTRIBUTE_UNUSED;
|
|
const char *namemd ATTRIBUTE_UNUSED;
|
|
|
|
pr_debug ("debug_exp: ");
|
|
|
|
switch (t->X_op)
|
|
{
|
|
default: name = "unknown"; break;
|
|
case O_illegal: name = "O_illegal"; break;
|
|
case O_absent: name = "O_absent"; break;
|
|
case O_constant: name = "O_constant"; break;
|
|
case O_symbol: name = "O_symbol"; break;
|
|
case O_symbol_rva: name = "O_symbol_rva"; break;
|
|
case O_register: name = "O_register"; break;
|
|
case O_big: name = "O_big"; break;
|
|
case O_uminus: name = "O_uminus"; break;
|
|
case O_bit_not: name = "O_bit_not"; break;
|
|
case O_logical_not: name = "O_logical_not"; break;
|
|
case O_multiply: name = "O_multiply"; break;
|
|
case O_divide: name = "O_divide"; break;
|
|
case O_modulus: name = "O_modulus"; break;
|
|
case O_left_shift: name = "O_left_shift"; break;
|
|
case O_right_shift: name = "O_right_shift"; break;
|
|
case O_bit_inclusive_or: name = "O_bit_inclusive_or"; break;
|
|
case O_bit_or_not: name = "O_bit_or_not"; break;
|
|
case O_bit_exclusive_or: name = "O_bit_exclusive_or"; break;
|
|
case O_bit_and: name = "O_bit_and"; break;
|
|
case O_add: name = "O_add"; break;
|
|
case O_subtract: name = "O_subtract"; break;
|
|
case O_eq: name = "O_eq"; break;
|
|
case O_ne: name = "O_ne"; break;
|
|
case O_lt: name = "O_lt"; break;
|
|
case O_le: name = "O_le"; break;
|
|
case O_ge: name = "O_ge"; break;
|
|
case O_gt: name = "O_gt"; break;
|
|
case O_logical_and: name = "O_logical_and"; break;
|
|
case O_logical_or: name = "O_logical_or"; break;
|
|
case O_index: name = "O_index"; break;
|
|
case O_bracket: name = "O_bracket"; break;
|
|
}
|
|
|
|
switch (t->X_md)
|
|
{
|
|
default: namemd = "unknown"; break;
|
|
case O_gotoff: namemd = "O_gotoff"; break;
|
|
case O_gotpc: namemd = "O_gotpc"; break;
|
|
case O_plt: namemd = "O_plt"; break;
|
|
case O_sda: namemd = "O_sda"; break;
|
|
case O_pcl: namemd = "O_pcl"; break;
|
|
case O_tlsgd: namemd = "O_tlsgd"; break;
|
|
case O_tlsie: namemd = "O_tlsie"; break;
|
|
case O_tpoff9: namemd = "O_tpoff9"; break;
|
|
case O_tpoff: namemd = "O_tpoff"; break;
|
|
case O_dtpoff9: namemd = "O_dtpoff9"; break;
|
|
case O_dtpoff: namemd = "O_dtpoff"; break;
|
|
}
|
|
|
|
pr_debug ("%s (%s, %s, %d, %s)", name,
|
|
(t->X_add_symbol) ? S_GET_NAME (t->X_add_symbol) : "--",
|
|
(t->X_op_symbol) ? S_GET_NAME (t->X_op_symbol) : "--",
|
|
(int) t->X_add_number,
|
|
(t->X_md) ? namemd : "--");
|
|
pr_debug ("\n");
|
|
fflush (stderr);
|
|
}
|
|
|
|
/* Parse the arguments to an opcode. */
|
|
|
|
static int
|
|
tokenize_arguments (char *str,
|
|
expressionS *tok,
|
|
int ntok)
|
|
{
|
|
char *old_input_line_pointer;
|
|
bfd_boolean saw_comma = FALSE;
|
|
bfd_boolean saw_arg = FALSE;
|
|
int brk_lvl = 0;
|
|
int num_args = 0;
|
|
int i;
|
|
size_t len;
|
|
const struct arc_reloc_op_tag *r;
|
|
expressionS tmpE;
|
|
char *reloc_name, c;
|
|
|
|
memset (tok, 0, sizeof (*tok) * ntok);
|
|
|
|
/* Save and restore input_line_pointer around this function. */
|
|
old_input_line_pointer = input_line_pointer;
|
|
input_line_pointer = str;
|
|
|
|
while (*input_line_pointer)
|
|
{
|
|
SKIP_WHITESPACE ();
|
|
switch (*input_line_pointer)
|
|
{
|
|
case '\0':
|
|
goto fini;
|
|
|
|
case ',':
|
|
input_line_pointer++;
|
|
if (saw_comma || !saw_arg)
|
|
goto err;
|
|
saw_comma = TRUE;
|
|
break;
|
|
|
|
case '}':
|
|
case ']':
|
|
++input_line_pointer;
|
|
--brk_lvl;
|
|
if (!saw_arg)
|
|
goto err;
|
|
tok->X_op = O_bracket;
|
|
++tok;
|
|
++num_args;
|
|
break;
|
|
|
|
case '{':
|
|
case '[':
|
|
input_line_pointer++;
|
|
if (brk_lvl)
|
|
goto err;
|
|
++brk_lvl;
|
|
tok->X_op = O_bracket;
|
|
++tok;
|
|
++num_args;
|
|
break;
|
|
|
|
case '@':
|
|
/* We have labels, function names and relocations, all
|
|
starting with @ symbol. Sort them out. */
|
|
if (saw_arg && !saw_comma)
|
|
goto err;
|
|
|
|
/* Parse @label. */
|
|
tok->X_op = O_symbol;
|
|
tok->X_md = O_absent;
|
|
expression (tok);
|
|
if (*input_line_pointer != '@')
|
|
goto normalsymbol; /* This is not a relocation. */
|
|
|
|
relocationsym:
|
|
|
|
/* A relocation opernad has the following form
|
|
@identifier@relocation_type. The identifier is already
|
|
in tok! */
|
|
if (tok->X_op != O_symbol)
|
|
{
|
|
as_bad (_("No valid label relocation operand"));
|
|
goto err;
|
|
}
|
|
|
|
/* Parse @relocation_type. */
|
|
input_line_pointer++;
|
|
c = get_symbol_name (&reloc_name);
|
|
len = input_line_pointer - reloc_name;
|
|
if (len == 0)
|
|
{
|
|
as_bad (_("No relocation operand"));
|
|
goto err;
|
|
}
|
|
|
|
/* Go through known relocation and try to find a match. */
|
|
r = &arc_reloc_op[0];
|
|
for (i = arc_num_reloc_op - 1; i >= 0; i--, r++)
|
|
if (len == r->length
|
|
&& memcmp (reloc_name, r->name, len) == 0)
|
|
break;
|
|
if (i < 0)
|
|
{
|
|
as_bad (_("Unknown relocation operand: @%s"), reloc_name);
|
|
goto err;
|
|
}
|
|
|
|
*input_line_pointer = c;
|
|
SKIP_WHITESPACE_AFTER_NAME ();
|
|
/* Extra check for TLS: base. */
|
|
if (*input_line_pointer == '@')
|
|
{
|
|
symbolS *base;
|
|
if (tok->X_op_symbol != NULL
|
|
|| tok->X_op != O_symbol)
|
|
{
|
|
as_bad (_("Unable to parse TLS base: %s"),
|
|
input_line_pointer);
|
|
goto err;
|
|
}
|
|
input_line_pointer++;
|
|
char *sym_name;
|
|
c = get_symbol_name (&sym_name);
|
|
base = symbol_find_or_make (sym_name);
|
|
tok->X_op = O_subtract;
|
|
tok->X_op_symbol = base;
|
|
restore_line_pointer (c);
|
|
tmpE.X_add_number = 0;
|
|
}
|
|
else if ((*input_line_pointer != '+')
|
|
&& (*input_line_pointer != '-'))
|
|
{
|
|
tmpE.X_add_number = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Parse the constant of a complex relocation expression
|
|
like @identifier@reloc +/- const. */
|
|
if (! r->complex_expr)
|
|
{
|
|
as_bad (_("@%s is not a complex relocation."), r->name);
|
|
goto err;
|
|
}
|
|
expression (&tmpE);
|
|
if (tmpE.X_op != O_constant)
|
|
{
|
|
as_bad (_("Bad expression: @%s + %s."),
|
|
r->name, input_line_pointer);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
tok->X_md = r->op;
|
|
tok->X_add_number = tmpE.X_add_number;
|
|
|
|
debug_exp (tok);
|
|
|
|
saw_comma = FALSE;
|
|
saw_arg = TRUE;
|
|
tok++;
|
|
num_args++;
|
|
break;
|
|
|
|
case '%':
|
|
/* Can be a register. */
|
|
++input_line_pointer;
|
|
/* Fall through. */
|
|
default:
|
|
|
|
if (saw_arg && !saw_comma)
|
|
goto err;
|
|
|
|
tok->X_op = O_absent;
|
|
tok->X_md = O_absent;
|
|
expression (tok);
|
|
|
|
/* Legacy: There are cases when we have
|
|
identifier@relocation_type, if it is the case parse the
|
|
relocation type as well. */
|
|
if (*input_line_pointer == '@')
|
|
goto relocationsym;
|
|
|
|
normalsymbol:
|
|
debug_exp (tok);
|
|
|
|
if (tok->X_op == O_illegal || tok->X_op == O_absent)
|
|
goto err;
|
|
|
|
saw_comma = FALSE;
|
|
saw_arg = TRUE;
|
|
tok++;
|
|
num_args++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
fini:
|
|
if (saw_comma || brk_lvl)
|
|
goto err;
|
|
input_line_pointer = old_input_line_pointer;
|
|
|
|
return num_args;
|
|
|
|
err:
|
|
if (brk_lvl)
|
|
as_bad (_("Brackets in operand field incorrect"));
|
|
else if (saw_comma)
|
|
as_bad (_("extra comma"));
|
|
else if (!saw_arg)
|
|
as_bad (_("missing argument"));
|
|
else
|
|
as_bad (_("missing comma or colon"));
|
|
input_line_pointer = old_input_line_pointer;
|
|
return -1;
|
|
}
|
|
|
|
/* Parse the flags to a structure. */
|
|
|
|
static int
|
|
tokenize_flags (const char *str,
|
|
struct arc_flags flags[],
|
|
int nflg)
|
|
{
|
|
char *old_input_line_pointer;
|
|
bfd_boolean saw_flg = FALSE;
|
|
bfd_boolean saw_dot = FALSE;
|
|
int num_flags = 0;
|
|
size_t flgnamelen;
|
|
|
|
memset (flags, 0, sizeof (*flags) * nflg);
|
|
|
|
/* Save and restore input_line_pointer around this function. */
|
|
old_input_line_pointer = input_line_pointer;
|
|
input_line_pointer = (char *) str;
|
|
|
|
while (*input_line_pointer)
|
|
{
|
|
switch (*input_line_pointer)
|
|
{
|
|
case ' ':
|
|
case '\0':
|
|
goto fini;
|
|
|
|
case '.':
|
|
input_line_pointer++;
|
|
if (saw_dot)
|
|
goto err;
|
|
saw_dot = TRUE;
|
|
saw_flg = FALSE;
|
|
break;
|
|
|
|
default:
|
|
if (saw_flg && !saw_dot)
|
|
goto err;
|
|
|
|
if (num_flags >= nflg)
|
|
goto err;
|
|
|
|
flgnamelen = strspn (input_line_pointer, "abcdefghilmnopqrstvwxz");
|
|
if (flgnamelen > MAX_FLAG_NAME_LENGHT)
|
|
goto err;
|
|
|
|
memcpy (flags->name, input_line_pointer, flgnamelen);
|
|
|
|
input_line_pointer += flgnamelen;
|
|
flags++;
|
|
saw_dot = FALSE;
|
|
saw_flg = TRUE;
|
|
num_flags++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
fini:
|
|
input_line_pointer = old_input_line_pointer;
|
|
return num_flags;
|
|
|
|
err:
|
|
if (saw_dot)
|
|
as_bad (_("extra dot"));
|
|
else if (!saw_flg)
|
|
as_bad (_("unrecognized flag"));
|
|
else
|
|
as_bad (_("failed to parse flags"));
|
|
input_line_pointer = old_input_line_pointer;
|
|
return -1;
|
|
}
|
|
|
|
/* Apply the fixups in order. */
|
|
|
|
static void
|
|
apply_fixups (struct arc_insn *insn, fragS *fragP, int fix)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < insn->nfixups; i++)
|
|
{
|
|
struct arc_fixup *fixup = &insn->fixups[i];
|
|
int size, pcrel, offset = 0;
|
|
|
|
/* FIXME! the reloc size is wrong in the BFD file.
|
|
When it is fixed please delete me. */
|
|
size = (insn->short_insn && !fixup->islong) ? 2 : 4;
|
|
|
|
if (fixup->islong)
|
|
offset = (insn->short_insn) ? 2 : 4;
|
|
|
|
/* Some fixups are only used internally, thus no howto. */
|
|
if ((int) fixup->reloc == 0)
|
|
as_fatal (_("Unhandled reloc type"));
|
|
|
|
if ((int) fixup->reloc < 0)
|
|
{
|
|
/* FIXME! the reloc size is wrong in the BFD file.
|
|
When it is fixed please enable me.
|
|
size = (insn->short_insn && !fixup->islong) ? 2 : 4; */
|
|
pcrel = fixup->pcrel;
|
|
}
|
|
else
|
|
{
|
|
reloc_howto_type *reloc_howto =
|
|
bfd_reloc_type_lookup (stdoutput,
|
|
(bfd_reloc_code_real_type) fixup->reloc);
|
|
gas_assert (reloc_howto);
|
|
|
|
/* FIXME! the reloc size is wrong in the BFD file.
|
|
When it is fixed please enable me.
|
|
size = bfd_get_reloc_size (reloc_howto); */
|
|
pcrel = reloc_howto->pc_relative;
|
|
}
|
|
|
|
pr_debug ("%s:%d: apply_fixups: new %s fixup (PCrel:%s) of size %d @ \
|
|
offset %d + %d\n",
|
|
fragP->fr_file, fragP->fr_line,
|
|
(fixup->reloc < 0) ? "Internal" :
|
|
bfd_get_reloc_code_name (fixup->reloc),
|
|
pcrel ? "Y" : "N",
|
|
size, fix, offset);
|
|
fix_new_exp (fragP, fix + offset,
|
|
size, &fixup->exp, pcrel, fixup->reloc);
|
|
|
|
/* Check for ZOLs, and update symbol info if any. */
|
|
if (LP_INSN (insn->insn))
|
|
{
|
|
gas_assert (fixup->exp.X_add_symbol);
|
|
ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Actually output an instruction with its fixup. */
|
|
|
|
static void
|
|
emit_insn0 (struct arc_insn *insn, char *where, bfd_boolean relax)
|
|
{
|
|
char *f = where;
|
|
|
|
pr_debug ("Emit insn : 0x%x\n", insn->insn);
|
|
pr_debug ("\tShort : 0x%d\n", insn->short_insn);
|
|
pr_debug ("\tLong imm: 0x%lx\n", insn->limm);
|
|
|
|
/* Write out the instruction. */
|
|
if (insn->short_insn)
|
|
{
|
|
if (insn->has_limm)
|
|
{
|
|
if (!relax)
|
|
f = frag_more (6);
|
|
md_number_to_chars (f, insn->insn, 2);
|
|
md_number_to_chars_midend (f + 2, insn->limm, 4);
|
|
dwarf2_emit_insn (6);
|
|
}
|
|
else
|
|
{
|
|
if (!relax)
|
|
f = frag_more (2);
|
|
md_number_to_chars (f, insn->insn, 2);
|
|
dwarf2_emit_insn (2);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (insn->has_limm)
|
|
{
|
|
if (!relax)
|
|
f = frag_more (8);
|
|
md_number_to_chars_midend (f, insn->insn, 4);
|
|
md_number_to_chars_midend (f + 4, insn->limm, 4);
|
|
dwarf2_emit_insn (8);
|
|
}
|
|
else
|
|
{
|
|
if (!relax)
|
|
f = frag_more (4);
|
|
md_number_to_chars_midend (f, insn->insn, 4);
|
|
dwarf2_emit_insn (4);
|
|
}
|
|
}
|
|
|
|
if (!relax)
|
|
apply_fixups (insn, frag_now, (f - frag_now->fr_literal));
|
|
}
|
|
|
|
static void
|
|
emit_insn1 (struct arc_insn *insn)
|
|
{
|
|
/* How frag_var's args are currently configured:
|
|
- rs_machine_dependent, to dictate it's a relaxation frag.
|
|
- FRAG_MAX_GROWTH, maximum size of instruction
|
|
- 0, variable size that might grow...unused by generic relaxation.
|
|
- frag_now->fr_subtype, fr_subtype starting value, set previously.
|
|
- s, opand expression.
|
|
- 0, offset but it's unused.
|
|
- 0, opcode but it's unused. */
|
|
symbolS *s = make_expr_symbol (&insn->fixups[0].exp);
|
|
frag_now->tc_frag_data.pcrel = insn->fixups[0].pcrel;
|
|
|
|
if (frag_room () < FRAG_MAX_GROWTH)
|
|
{
|
|
/* Handle differently when frag literal memory is exhausted.
|
|
This is used because when there's not enough memory left in
|
|
the current frag, a new frag is created and the information
|
|
we put into frag_now->tc_frag_data is disregarded. */
|
|
|
|
struct arc_relax_type relax_info_copy;
|
|
relax_substateT subtype = frag_now->fr_subtype;
|
|
|
|
memcpy (&relax_info_copy, &frag_now->tc_frag_data,
|
|
sizeof (struct arc_relax_type));
|
|
|
|
frag_wane (frag_now);
|
|
frag_grow (FRAG_MAX_GROWTH);
|
|
|
|
memcpy (&frag_now->tc_frag_data, &relax_info_copy,
|
|
sizeof (struct arc_relax_type));
|
|
|
|
frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
|
|
subtype, s, 0, 0);
|
|
}
|
|
else
|
|
frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
|
|
frag_now->fr_subtype, s, 0, 0);
|
|
}
|
|
|
|
static void
|
|
emit_insn (struct arc_insn *insn)
|
|
{
|
|
if (insn->relax)
|
|
emit_insn1 (insn);
|
|
else
|
|
emit_insn0 (insn, NULL, FALSE);
|
|
}
|
|
|
|
/* Check whether a symbol involves a register. */
|
|
|
|
static bfd_boolean
|
|
contains_register (symbolS *sym)
|
|
{
|
|
if (sym)
|
|
{
|
|
expressionS *ex = symbol_get_value_expression (sym);
|
|
|
|
return ((O_register == ex->X_op)
|
|
&& !contains_register (ex->X_add_symbol)
|
|
&& !contains_register (ex->X_op_symbol));
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Returns the register number within a symbol. */
|
|
|
|
static int
|
|
get_register (symbolS *sym)
|
|
{
|
|
if (!contains_register (sym))
|
|
return -1;
|
|
|
|
expressionS *ex = symbol_get_value_expression (sym);
|
|
return regno (ex->X_add_number);
|
|
}
|
|
|
|
/* Return true if a RELOC is generic. A generic reloc is PC-rel of a
|
|
simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */
|
|
|
|
static bfd_boolean
|
|
generic_reloc_p (extended_bfd_reloc_code_real_type reloc)
|
|
{
|
|
if (!reloc)
|
|
return FALSE;
|
|
|
|
switch (reloc)
|
|
{
|
|
case BFD_RELOC_ARC_SDA_LDST:
|
|
case BFD_RELOC_ARC_SDA_LDST1:
|
|
case BFD_RELOC_ARC_SDA_LDST2:
|
|
case BFD_RELOC_ARC_SDA16_LD:
|
|
case BFD_RELOC_ARC_SDA16_LD1:
|
|
case BFD_RELOC_ARC_SDA16_LD2:
|
|
case BFD_RELOC_ARC_SDA16_ST2:
|
|
case BFD_RELOC_ARC_SDA32_ME:
|
|
return FALSE;
|
|
default:
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/* Allocates a tok entry. */
|
|
|
|
static int
|
|
allocate_tok (expressionS *tok, int ntok, int cidx)
|
|
{
|
|
if (ntok > MAX_INSN_ARGS - 2)
|
|
return 0; /* No space left. */
|
|
|
|
if (cidx > ntok)
|
|
return 0; /* Incorect args. */
|
|
|
|
memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok));
|
|
|
|
if (cidx == ntok)
|
|
return 1; /* Success. */
|
|
return allocate_tok (tok, ntok - 1, cidx);
|
|
}
|
|
|
|
/* Search forward through all variants of an opcode looking for a
|
|
syntax match. */
|
|
|
|
static const struct arc_opcode *
|
|
find_opcode_match (const struct arc_opcode *first_opcode,
|
|
expressionS *tok,
|
|
int *pntok,
|
|
struct arc_flags *first_pflag,
|
|
int nflgs,
|
|
int *pcpumatch)
|
|
{
|
|
const struct arc_opcode *opcode = first_opcode;
|
|
int ntok = *pntok;
|
|
int got_cpu_match = 0;
|
|
expressionS bktok[MAX_INSN_ARGS];
|
|
int bkntok;
|
|
expressionS emptyE;
|
|
|
|
memset (&emptyE, 0, sizeof (emptyE));
|
|
memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok));
|
|
bkntok = ntok;
|
|
|
|
do
|
|
{
|
|
const unsigned char *opidx;
|
|
const unsigned char *flgidx;
|
|
int tokidx = 0;
|
|
const expressionS *t = &emptyE;
|
|
|
|
pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08X ",
|
|
frag_now->fr_file, frag_now->fr_line, opcode->opcode);
|
|
|
|
/* Don't match opcodes that don't exist on this
|
|
architecture. */
|
|
if (!(opcode->cpu & arc_target))
|
|
goto match_failed;
|
|
|
|
if (is_code_density_p (opcode) && !(arc_features & ARC_CD))
|
|
goto match_failed;
|
|
|
|
got_cpu_match = 1;
|
|
pr_debug ("cpu ");
|
|
|
|
/* Check the operands. */
|
|
for (opidx = opcode->operands; *opidx; ++opidx)
|
|
{
|
|
const struct arc_operand *operand = &arc_operands[*opidx];
|
|
|
|
/* Only take input from real operands. */
|
|
if ((operand->flags & ARC_OPERAND_FAKE)
|
|
&& !(operand->flags & ARC_OPERAND_BRAKET))
|
|
continue;
|
|
|
|
/* When we expect input, make sure we have it. */
|
|
if (tokidx >= ntok)
|
|
goto match_failed;
|
|
|
|
/* Match operand type with expression type. */
|
|
switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
|
|
{
|
|
case ARC_OPERAND_IR:
|
|
/* Check to be a register. */
|
|
if ((tok[tokidx].X_op != O_register
|
|
|| !is_ir_num (tok[tokidx].X_add_number))
|
|
&& !(operand->flags & ARC_OPERAND_IGNORE))
|
|
goto match_failed;
|
|
|
|
/* If expect duplicate, make sure it is duplicate. */
|
|
if (operand->flags & ARC_OPERAND_DUPLICATE)
|
|
{
|
|
/* Check for duplicate. */
|
|
if (t->X_op != O_register
|
|
|| !is_ir_num (t->X_add_number)
|
|
|| (regno (t->X_add_number) !=
|
|
regno (tok[tokidx].X_add_number)))
|
|
goto match_failed;
|
|
}
|
|
|
|
/* Special handling? */
|
|
if (operand->insert)
|
|
{
|
|
const char *errmsg = NULL;
|
|
(*operand->insert)(0,
|
|
regno (tok[tokidx].X_add_number),
|
|
&errmsg);
|
|
if (errmsg)
|
|
{
|
|
if (operand->flags & ARC_OPERAND_IGNORE)
|
|
{
|
|
/* Missing argument, create one. */
|
|
if (!allocate_tok (tok, ntok - 1, tokidx))
|
|
goto match_failed;
|
|
|
|
tok[tokidx].X_op = O_absent;
|
|
++ntok;
|
|
}
|
|
else
|
|
goto match_failed;
|
|
}
|
|
}
|
|
|
|
t = &tok[tokidx];
|
|
break;
|
|
|
|
case ARC_OPERAND_BRAKET:
|
|
/* Check if bracket is also in opcode table as
|
|
operand. */
|
|
if (tok[tokidx].X_op != O_bracket)
|
|
goto match_failed;
|
|
break;
|
|
|
|
case ARC_OPERAND_LIMM:
|
|
case ARC_OPERAND_SIGNED:
|
|
case ARC_OPERAND_UNSIGNED:
|
|
switch (tok[tokidx].X_op)
|
|
{
|
|
case O_illegal:
|
|
case O_absent:
|
|
case O_register:
|
|
goto match_failed;
|
|
|
|
case O_bracket:
|
|
/* Got an (too) early bracket, check if it is an
|
|
ignored operand. N.B. This procedure works only
|
|
when bracket is the last operand! */
|
|
if (!(operand->flags & ARC_OPERAND_IGNORE))
|
|
goto match_failed;
|
|
/* Insert the missing operand. */
|
|
if (!allocate_tok (tok, ntok - 1, tokidx))
|
|
goto match_failed;
|
|
|
|
tok[tokidx].X_op = O_absent;
|
|
++ntok;
|
|
break;
|
|
|
|
case O_constant:
|
|
/* Check the range. */
|
|
if (operand->bits != 32
|
|
&& !(operand->flags & ARC_OPERAND_NCHK))
|
|
{
|
|
offsetT min, max, val;
|
|
val = tok[tokidx].X_add_number;
|
|
|
|
if (operand->flags & ARC_OPERAND_SIGNED)
|
|
{
|
|
max = (1 << (operand->bits - 1)) - 1;
|
|
min = -(1 << (operand->bits - 1));
|
|
}
|
|
else
|
|
{
|
|
max = (1 << operand->bits) - 1;
|
|
min = 0;
|
|
}
|
|
|
|
if (val < min || val > max)
|
|
goto match_failed;
|
|
|
|
/* Check alignmets. */
|
|
if ((operand->flags & ARC_OPERAND_ALIGNED32)
|
|
&& (val & 0x03))
|
|
goto match_failed;
|
|
|
|
if ((operand->flags & ARC_OPERAND_ALIGNED16)
|
|
&& (val & 0x01))
|
|
goto match_failed;
|
|
}
|
|
else if (operand->flags & ARC_OPERAND_NCHK)
|
|
{
|
|
if (operand->insert)
|
|
{
|
|
const char *errmsg = NULL;
|
|
(*operand->insert)(0,
|
|
tok[tokidx].X_add_number,
|
|
&errmsg);
|
|
if (errmsg)
|
|
goto match_failed;
|
|
}
|
|
else
|
|
goto match_failed;
|
|
}
|
|
break;
|
|
|
|
case O_subtract:
|
|
/* Check if it is register range. */
|
|
if ((tok[tokidx].X_add_number == 0)
|
|
&& contains_register (tok[tokidx].X_add_symbol)
|
|
&& contains_register (tok[tokidx].X_op_symbol))
|
|
{
|
|
int regs;
|
|
|
|
regs = get_register (tok[tokidx].X_add_symbol);
|
|
regs <<= 16;
|
|
regs |= get_register (tok[tokidx].X_op_symbol);
|
|
if (operand->insert)
|
|
{
|
|
const char *errmsg = NULL;
|
|
(*operand->insert)(0,
|
|
regs,
|
|
&errmsg);
|
|
if (errmsg)
|
|
goto match_failed;
|
|
}
|
|
else
|
|
goto match_failed;
|
|
break;
|
|
}
|
|
default:
|
|
if (operand->default_reloc == 0)
|
|
goto match_failed; /* The operand needs relocation. */
|
|
|
|
/* Relocs requiring long immediate. FIXME! make it
|
|
generic and move it to a function. */
|
|
switch (tok[tokidx].X_md)
|
|
{
|
|
case O_gotoff:
|
|
case O_gotpc:
|
|
case O_pcl:
|
|
case O_tpoff:
|
|
case O_dtpoff:
|
|
case O_tlsgd:
|
|
case O_tlsie:
|
|
if (!(operand->flags & ARC_OPERAND_LIMM))
|
|
goto match_failed;
|
|
case O_absent:
|
|
if (!generic_reloc_p (operand->default_reloc))
|
|
goto match_failed;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
/* If expect duplicate, make sure it is duplicate. */
|
|
if (operand->flags & ARC_OPERAND_DUPLICATE)
|
|
{
|
|
if (t->X_op == O_illegal
|
|
|| t->X_op == O_absent
|
|
|| t->X_op == O_register
|
|
|| (t->X_add_number != tok[tokidx].X_add_number))
|
|
goto match_failed;
|
|
}
|
|
t = &tok[tokidx];
|
|
break;
|
|
|
|
default:
|
|
/* Everything else should have been fake. */
|
|
abort ();
|
|
}
|
|
|
|
++tokidx;
|
|
}
|
|
pr_debug ("opr ");
|
|
|
|
/* Check the flags. Iterate over the valid flag classes. */
|
|
int lnflg = nflgs;
|
|
|
|
for (flgidx = opcode->flags; *flgidx && lnflg; ++flgidx)
|
|
{
|
|
/* Get a valid flag class. */
|
|
const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
|
|
const unsigned *flgopridx;
|
|
|
|
for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
|
|
{
|
|
const struct arc_flag_operand *flg_operand;
|
|
struct arc_flags *pflag = first_pflag;
|
|
int i;
|
|
|
|
flg_operand = &arc_flag_operands[*flgopridx];
|
|
for (i = 0; i < nflgs; i++, pflag++)
|
|
{
|
|
/* Match against the parsed flags. */
|
|
if (!strcmp (flg_operand->name, pflag->name))
|
|
{
|
|
/*TODO: Check if it is duplicated. */
|
|
pflag->code = *flgopridx;
|
|
lnflg--;
|
|
break; /* goto next flag class and parsed flag. */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Did I check all the parsed flags? */
|
|
if (lnflg)
|
|
goto match_failed;
|
|
|
|
pr_debug ("flg");
|
|
/* Possible match -- did we use all of our input? */
|
|
if (tokidx == ntok)
|
|
{
|
|
*pntok = ntok;
|
|
pr_debug ("\n");
|
|
return opcode;
|
|
}
|
|
|
|
match_failed:;
|
|
pr_debug ("\n");
|
|
/* Restore the original parameters. */
|
|
memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok));
|
|
ntok = bkntok;
|
|
}
|
|
while (++opcode - arc_opcodes < (int) arc_num_opcodes
|
|
&& !strcmp (opcode->name, first_opcode->name));
|
|
|
|
if (*pcpumatch)
|
|
*pcpumatch = got_cpu_match;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Swap operand tokens. */
|
|
|
|
static void
|
|
swap_operand (expressionS *operand_array,
|
|
unsigned source,
|
|
unsigned destination)
|
|
{
|
|
expressionS cpy_operand;
|
|
expressionS *src_operand;
|
|
expressionS *dst_operand;
|
|
size_t size;
|
|
|
|
if (source == destination)
|
|
return;
|
|
|
|
src_operand = &operand_array[source];
|
|
dst_operand = &operand_array[destination];
|
|
size = sizeof (expressionS);
|
|
|
|
/* Make copy of operand to swap with and swap. */
|
|
memcpy (&cpy_operand, dst_operand, size);
|
|
memcpy (dst_operand, src_operand, size);
|
|
memcpy (src_operand, &cpy_operand, size);
|
|
}
|
|
|
|
/* Check if *op matches *tok type.
|
|
Returns FALSE if they don't match, TRUE if they match. */
|
|
|
|
static bfd_boolean
|
|
pseudo_operand_match (const expressionS *tok,
|
|
const struct arc_operand_operation *op)
|
|
{
|
|
offsetT min, max, val;
|
|
bfd_boolean ret;
|
|
const struct arc_operand *operand_real = &arc_operands[op->operand_idx];
|
|
|
|
ret = FALSE;
|
|
switch (tok->X_op)
|
|
{
|
|
case O_constant:
|
|
if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM))
|
|
ret = 1;
|
|
else if (!(operand_real->flags & ARC_OPERAND_IR))
|
|
{
|
|
val = tok->X_add_number + op->count;
|
|
if (operand_real->flags & ARC_OPERAND_SIGNED)
|
|
{
|
|
max = (1 << (operand_real->bits - 1)) - 1;
|
|
min = -(1 << (operand_real->bits - 1));
|
|
}
|
|
else
|
|
{
|
|
max = (1 << operand_real->bits) - 1;
|
|
min = 0;
|
|
}
|
|
if (min <= val && val <= max)
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
|
|
case O_symbol:
|
|
/* Handle all symbols as long immediates or signed 9. */
|
|
if (operand_real->flags & ARC_OPERAND_LIMM ||
|
|
((operand_real->flags & ARC_OPERAND_SIGNED) && operand_real->bits == 9))
|
|
ret = TRUE;
|
|
break;
|
|
|
|
case O_register:
|
|
if (operand_real->flags & ARC_OPERAND_IR)
|
|
ret = TRUE;
|
|
break;
|
|
|
|
case O_bracket:
|
|
if (operand_real->flags & ARC_OPERAND_BRAKET)
|
|
ret = TRUE;
|
|
break;
|
|
|
|
default:
|
|
/* Unknown. */
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* Find pseudo instruction in array. */
|
|
|
|
static const struct arc_pseudo_insn *
|
|
find_pseudo_insn (const char *opname,
|
|
int ntok,
|
|
const expressionS *tok)
|
|
{
|
|
const struct arc_pseudo_insn *pseudo_insn = NULL;
|
|
const struct arc_operand_operation *op;
|
|
unsigned int i;
|
|
int j;
|
|
|
|
for (i = 0; i < arc_num_pseudo_insn; ++i)
|
|
{
|
|
pseudo_insn = &arc_pseudo_insns[i];
|
|
if (strcmp (pseudo_insn->mnemonic_p, opname) == 0)
|
|
{
|
|
op = pseudo_insn->operand;
|
|
for (j = 0; j < ntok; ++j)
|
|
if (!pseudo_operand_match (&tok[j], &op[j]))
|
|
break;
|
|
|
|
/* Found the right instruction. */
|
|
if (j == ntok)
|
|
return pseudo_insn;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Assumes the expressionS *tok is of sufficient size. */
|
|
|
|
static const struct arc_opcode *
|
|
find_special_case_pseudo (const char *opname,
|
|
int *ntok,
|
|
expressionS *tok,
|
|
int *nflgs,
|
|
struct arc_flags *pflags)
|
|
{
|
|
const struct arc_pseudo_insn *pseudo_insn = NULL;
|
|
const struct arc_operand_operation *operand_pseudo;
|
|
const struct arc_operand *operand_real;
|
|
unsigned i;
|
|
char construct_operand[MAX_CONSTR_STR];
|
|
|
|
/* Find whether opname is in pseudo instruction array. */
|
|
pseudo_insn = find_pseudo_insn (opname, *ntok, tok);
|
|
|
|
if (pseudo_insn == NULL)
|
|
return NULL;
|
|
|
|
/* Handle flag, Limited to one flag at the moment. */
|
|
if (pseudo_insn->flag_r != NULL)
|
|
*nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs],
|
|
MAX_INSN_FLGS - *nflgs);
|
|
|
|
/* Handle operand operations. */
|
|
for (i = 0; i < pseudo_insn->operand_cnt; ++i)
|
|
{
|
|
operand_pseudo = &pseudo_insn->operand[i];
|
|
operand_real = &arc_operands[operand_pseudo->operand_idx];
|
|
|
|
if (operand_real->flags & ARC_OPERAND_BRAKET &&
|
|
!operand_pseudo->needs_insert)
|
|
continue;
|
|
|
|
/* Has to be inserted (i.e. this token does not exist yet). */
|
|
if (operand_pseudo->needs_insert)
|
|
{
|
|
if (operand_real->flags & ARC_OPERAND_BRAKET)
|
|
{
|
|
tok[i].X_op = O_bracket;
|
|
++(*ntok);
|
|
continue;
|
|
}
|
|
|
|
/* Check if operand is a register or constant and handle it
|
|
by type. */
|
|
if (operand_real->flags & ARC_OPERAND_IR)
|
|
snprintf (construct_operand, MAX_CONSTR_STR, "r%d",
|
|
operand_pseudo->count);
|
|
else
|
|
snprintf (construct_operand, MAX_CONSTR_STR, "%d",
|
|
operand_pseudo->count);
|
|
|
|
tokenize_arguments (construct_operand, &tok[i], 1);
|
|
++(*ntok);
|
|
}
|
|
|
|
else if (operand_pseudo->count)
|
|
{
|
|
/* Operand number has to be adjusted accordingly (by operand
|
|
type). */
|
|
switch (tok[i].X_op)
|
|
{
|
|
case O_constant:
|
|
tok[i].X_add_number += operand_pseudo->count;
|
|
break;
|
|
|
|
case O_symbol:
|
|
break;
|
|
|
|
default:
|
|
/* Ignored. */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Swap operands if necessary. Only supports one swap at the
|
|
moment. */
|
|
for (i = 0; i < pseudo_insn->operand_cnt; ++i)
|
|
{
|
|
operand_pseudo = &pseudo_insn->operand[i];
|
|
|
|
if (operand_pseudo->swap_operand_idx == i)
|
|
continue;
|
|
|
|
swap_operand (tok, i, operand_pseudo->swap_operand_idx);
|
|
|
|
/* Prevent a swap back later by breaking out. */
|
|
break;
|
|
}
|
|
|
|
return (const struct arc_opcode *)
|
|
hash_find (arc_opcode_hash, pseudo_insn->mnemonic_r);
|
|
}
|
|
|
|
static const struct arc_opcode *
|
|
find_special_case_flag (const char *opname,
|
|
int *nflgs,
|
|
struct arc_flags *pflags)
|
|
{
|
|
unsigned int i;
|
|
const char *flagnm;
|
|
unsigned flag_idx, flag_arr_idx;
|
|
size_t flaglen, oplen;
|
|
const struct arc_flag_special *arc_flag_special_opcode;
|
|
const struct arc_opcode *opcode;
|
|
|
|
/* Search for special case instruction. */
|
|
for (i = 0; i < arc_num_flag_special; i++)
|
|
{
|
|
arc_flag_special_opcode = &arc_flag_special_cases[i];
|
|
oplen = strlen (arc_flag_special_opcode->name);
|
|
|
|
if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0)
|
|
continue;
|
|
|
|
/* Found a potential special case instruction, now test for
|
|
flags. */
|
|
for (flag_arr_idx = 0;; ++flag_arr_idx)
|
|
{
|
|
flag_idx = arc_flag_special_opcode->flags[flag_arr_idx];
|
|
if (flag_idx == 0)
|
|
break; /* End of array, nothing found. */
|
|
|
|
flagnm = arc_flag_operands[flag_idx].name;
|
|
flaglen = strlen (flagnm);
|
|
if (strcmp (opname + oplen, flagnm) == 0)
|
|
{
|
|
opcode = (const struct arc_opcode *)
|
|
hash_find (arc_opcode_hash,
|
|
arc_flag_special_opcode->name);
|
|
|
|
if (*nflgs + 1 > MAX_INSN_FLGS)
|
|
break;
|
|
memcpy (pflags[*nflgs].name, flagnm, flaglen);
|
|
pflags[*nflgs].name[flaglen] = '\0';
|
|
(*nflgs)++;
|
|
return opcode;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Used to find special case opcode. */
|
|
|
|
static const struct arc_opcode *
|
|
find_special_case (const char *opname,
|
|
int *nflgs,
|
|
struct arc_flags *pflags,
|
|
expressionS *tok,
|
|
int *ntok)
|
|
{
|
|
const struct arc_opcode *opcode;
|
|
|
|
opcode = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags);
|
|
|
|
if (opcode == NULL)
|
|
opcode = find_special_case_flag (opname, nflgs, pflags);
|
|
|
|
return opcode;
|
|
}
|
|
|
|
static void
|
|
preprocess_operands (const struct arc_opcode *opcode,
|
|
expressionS *tok,
|
|
int ntok)
|
|
{
|
|
int i;
|
|
size_t len;
|
|
const char *p;
|
|
unsigned j;
|
|
const struct arc_aux_reg *auxr;
|
|
|
|
for (i = 0; i < ntok; i++)
|
|
{
|
|
switch (tok[i].X_op)
|
|
{
|
|
case O_illegal:
|
|
case O_absent:
|
|
break; /* Throw and error. */
|
|
|
|
case O_symbol:
|
|
if (opcode->class != AUXREG)
|
|
break;
|
|
/* Convert the symbol to a constant if possible. */
|
|
p = S_GET_NAME (tok[i].X_add_symbol);
|
|
len = strlen (p);
|
|
|
|
auxr = &arc_aux_regs[0];
|
|
for (j = 0; j < arc_num_aux_regs; j++, auxr++)
|
|
if (len == auxr->length
|
|
&& strcasecmp (auxr->name, p) == 0)
|
|
{
|
|
tok[i].X_op = O_constant;
|
|
tok[i].X_add_number = auxr->address;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Given an opcode name, pre-tockenized set of argumenst and the
|
|
opcode flags, take it all the way through emission. */
|
|
|
|
static void
|
|
assemble_tokens (const char *opname,
|
|
expressionS *tok,
|
|
int ntok,
|
|
struct arc_flags *pflags,
|
|
int nflgs)
|
|
{
|
|
bfd_boolean found_something = FALSE;
|
|
const struct arc_opcode *opcode;
|
|
int cpumatch = 1;
|
|
|
|
/* Search opcodes. */
|
|
opcode = (const struct arc_opcode *) hash_find (arc_opcode_hash, opname);
|
|
|
|
/* Couldn't find opcode conventional way, try special cases. */
|
|
if (!opcode)
|
|
opcode = find_special_case (opname, &nflgs, pflags, tok, &ntok);
|
|
|
|
if (opcode)
|
|
{
|
|
pr_debug ("%s:%d: assemble_tokens: %s trying opcode 0x%08X\n",
|
|
frag_now->fr_file, frag_now->fr_line, opcode->name,
|
|
opcode->opcode);
|
|
|
|
preprocess_operands (opcode, tok, ntok);
|
|
|
|
found_something = TRUE;
|
|
opcode = find_opcode_match (opcode, tok, &ntok, pflags, nflgs, &cpumatch);
|
|
if (opcode)
|
|
{
|
|
struct arc_insn insn;
|
|
assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn);
|
|
emit_insn (&insn);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (found_something)
|
|
{
|
|
if (cpumatch)
|
|
as_bad (_("inappropriate arguments for opcode '%s'"), opname);
|
|
else
|
|
as_bad (_("opcode '%s' not supported for target %s"), opname,
|
|
arc_target_name);
|
|
}
|
|
else
|
|
as_bad (_("unknown opcode '%s'"), opname);
|
|
}
|
|
|
|
/* The public interface to the instruction assembler. */
|
|
|
|
void
|
|
md_assemble (char *str)
|
|
{
|
|
char *opname;
|
|
expressionS tok[MAX_INSN_ARGS];
|
|
int ntok, nflg;
|
|
size_t opnamelen;
|
|
struct arc_flags flags[MAX_INSN_FLGS];
|
|
|
|
/* Split off the opcode. */
|
|
opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468");
|
|
opname = xmalloc (opnamelen + 1);
|
|
memcpy (opname, str, opnamelen);
|
|
opname[opnamelen] = '\0';
|
|
|
|
/* Signalize we are assmbling the instructions. */
|
|
assembling_insn = TRUE;
|
|
|
|
/* Tokenize the flags. */
|
|
if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1)
|
|
{
|
|
as_bad (_("syntax error"));
|
|
return;
|
|
}
|
|
|
|
/* Scan up to the end of the mnemonic which must end in space or end
|
|
of string. */
|
|
str += opnamelen;
|
|
for (; *str != '\0'; str++)
|
|
if (*str == ' ')
|
|
break;
|
|
|
|
/* Tokenize the rest of the line. */
|
|
if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0)
|
|
{
|
|
as_bad (_("syntax error"));
|
|
return;
|
|
}
|
|
|
|
/* Finish it off. */
|
|
assemble_tokens (opname, tok, ntok, flags, nflg);
|
|
assembling_insn = FALSE;
|
|
}
|
|
|
|
/* Callback to insert a register into the hash table. */
|
|
|
|
static void
|
|
declare_register (const char *name, int number)
|
|
{
|
|
const char *err;
|
|
symbolS *regS = symbol_create (name, reg_section,
|
|
number, &zero_address_frag);
|
|
|
|
err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS);
|
|
if (err)
|
|
as_fatal ("Inserting \"%s\" into register table failed: %s",
|
|
name, err);
|
|
}
|
|
|
|
/* Construct symbols for each of the general registers. */
|
|
|
|
static void
|
|
declare_register_set (void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 64; ++i)
|
|
{
|
|
char name[7];
|
|
|
|
sprintf (name, "r%d", i);
|
|
declare_register (name, i);
|
|
if ((i & 0x01) == 0)
|
|
{
|
|
sprintf (name, "r%dr%d", i, i+1);
|
|
declare_register (name, i);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Port-specific assembler initialization. This function is called
|
|
once, at assembler startup time. */
|
|
|
|
void
|
|
md_begin (void)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* The endianness can be chosen "at the factory". */
|
|
target_big_endian = byte_order == BIG_ENDIAN;
|
|
|
|
if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
|
|
as_warn (_("could not set architecture and machine"));
|
|
|
|
/* Set elf header flags. */
|
|
bfd_set_private_flags (stdoutput, arc_eflag);
|
|
|
|
/* Set up a hash table for the instructions. */
|
|
arc_opcode_hash = hash_new ();
|
|
if (arc_opcode_hash == NULL)
|
|
as_fatal (_("Virtual memory exhausted"));
|
|
|
|
/* Initialize the hash table with the insns. */
|
|
for (i = 0; i < arc_num_opcodes;)
|
|
{
|
|
const char *name, *retval;
|
|
|
|
name = arc_opcodes[i].name;
|
|
retval = hash_insert (arc_opcode_hash, name, (void *) &arc_opcodes[i]);
|
|
if (retval)
|
|
as_fatal (_("internal error: can't hash opcode '%s': %s"),
|
|
name, retval);
|
|
|
|
while (++i < arc_num_opcodes
|
|
&& (arc_opcodes[i].name == name
|
|
|| !strcmp (arc_opcodes[i].name, name)))
|
|
continue;
|
|
}
|
|
|
|
/* Register declaration. */
|
|
arc_reg_hash = hash_new ();
|
|
if (arc_reg_hash == NULL)
|
|
as_fatal (_("Virtual memory exhausted"));
|
|
|
|
declare_register_set ();
|
|
declare_register ("gp", 26);
|
|
declare_register ("fp", 27);
|
|
declare_register ("sp", 28);
|
|
declare_register ("ilink", 29);
|
|
declare_register ("ilink1", 29);
|
|
declare_register ("ilink2", 30);
|
|
declare_register ("blink", 31);
|
|
|
|
declare_register ("mlo", 57);
|
|
declare_register ("mmid", 58);
|
|
declare_register ("mhi", 59);
|
|
|
|
declare_register ("acc1", 56);
|
|
declare_register ("acc2", 57);
|
|
|
|
declare_register ("lp_count", 60);
|
|
declare_register ("pcl", 63);
|
|
|
|
/* Initialize the last instructions. */
|
|
memset (&arc_last_insns[0], 0, sizeof (arc_last_insns));
|
|
}
|
|
|
|
/* Write a value out to the object file, using the appropriate
|
|
endianness. */
|
|
|
|
void
|
|
md_number_to_chars (char *buf,
|
|
valueT val,
|
|
int n)
|
|
{
|
|
if (target_big_endian)
|
|
number_to_chars_bigendian (buf, val, n);
|
|
else
|
|
number_to_chars_littleendian (buf, val, n);
|
|
}
|
|
|
|
/* Round up a section size to the appropriate boundary. */
|
|
|
|
valueT
|
|
md_section_align (segT segment,
|
|
valueT size)
|
|
{
|
|
int align = bfd_get_section_alignment (stdoutput, segment);
|
|
|
|
return ((size + (1 << align) - 1) & (-((valueT) 1 << align)));
|
|
}
|
|
|
|
/* The location from which a PC relative jump should be calculated,
|
|
given a PC relative reloc. */
|
|
|
|
long
|
|
md_pcrel_from_section (fixS *fixP,
|
|
segT sec)
|
|
{
|
|
offsetT base = fixP->fx_where + fixP->fx_frag->fr_address;
|
|
|
|
pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset);
|
|
|
|
if (fixP->fx_addsy != (symbolS *) NULL
|
|
&& (!S_IS_DEFINED (fixP->fx_addsy)
|
|
|| S_GET_SEGMENT (fixP->fx_addsy) != sec))
|
|
{
|
|
pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy));
|
|
|
|
/* The symbol is undefined (or is defined but not in this section).
|
|
Let the linker figure it out. */
|
|
return 0;
|
|
}
|
|
|
|
if ((int) fixP->fx_r_type < 0)
|
|
{
|
|
/* These are the "internal" relocations. Align them to
|
|
32 bit boundary (PCL), for the moment. */
|
|
base &= ~3;
|
|
}
|
|
else
|
|
{
|
|
switch (fixP->fx_r_type)
|
|
{
|
|
case BFD_RELOC_ARC_PC32:
|
|
/* The hardware calculates relative to the start of the
|
|
insn, but this relocation is relative to location of the
|
|
LIMM, compensate. The base always needs to be
|
|
substracted by 4 as we do not support this type of PCrel
|
|
relocation for short instructions. */
|
|
base -= 4;
|
|
/* Fall through. */
|
|
case BFD_RELOC_ARC_PLT32:
|
|
case BFD_RELOC_ARC_S25H_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S21H_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S25W_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S21W_PCREL_PLT:
|
|
|
|
case BFD_RELOC_ARC_S21H_PCREL:
|
|
case BFD_RELOC_ARC_S25H_PCREL:
|
|
case BFD_RELOC_ARC_S13_PCREL:
|
|
case BFD_RELOC_ARC_S21W_PCREL:
|
|
case BFD_RELOC_ARC_S25W_PCREL:
|
|
base &= ~3;
|
|
break;
|
|
default:
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("unhandled reloc %s in md_pcrel_from_section"),
|
|
bfd_get_reloc_code_name (fixP->fx_r_type));
|
|
break;
|
|
}
|
|
}
|
|
|
|
pr_debug ("pcrel from %x + %lx = %x, symbol: %s (%x)\n",
|
|
fixP->fx_frag->fr_address, fixP->fx_where, base,
|
|
fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)",
|
|
fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0);
|
|
|
|
return base;
|
|
}
|
|
|
|
/* Given a BFD relocation find the coresponding operand. */
|
|
|
|
static const struct arc_operand *
|
|
find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < arc_num_operands; i++)
|
|
if (arc_operands[i].default_reloc == reloc)
|
|
return &arc_operands[i];
|
|
return NULL;
|
|
}
|
|
|
|
/* Insert an operand value into an instruction. */
|
|
|
|
static unsigned
|
|
insert_operand (unsigned insn,
|
|
const struct arc_operand *operand,
|
|
offsetT val,
|
|
const char *file,
|
|
unsigned line)
|
|
{
|
|
offsetT min = 0, max = 0;
|
|
|
|
if (operand->bits != 32
|
|
&& !(operand->flags & ARC_OPERAND_NCHK)
|
|
&& !(operand->flags & ARC_OPERAND_FAKE))
|
|
{
|
|
if (operand->flags & ARC_OPERAND_SIGNED)
|
|
{
|
|
max = (1 << (operand->bits - 1)) - 1;
|
|
min = -(1 << (operand->bits - 1));
|
|
}
|
|
else
|
|
{
|
|
max = (1 << operand->bits) - 1;
|
|
min = 0;
|
|
}
|
|
|
|
if (val < min || val > max)
|
|
as_bad_value_out_of_range (_("operand"),
|
|
val, min, max, file, line);
|
|
}
|
|
|
|
pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08x\n",
|
|
min, val, max, insn);
|
|
|
|
if ((operand->flags & ARC_OPERAND_ALIGNED32)
|
|
&& (val & 0x03))
|
|
as_bad_where (file, line,
|
|
_("Unaligned operand. Needs to be 32bit aligned"));
|
|
|
|
if ((operand->flags & ARC_OPERAND_ALIGNED16)
|
|
&& (val & 0x01))
|
|
as_bad_where (file, line,
|
|
_("Unaligned operand. Needs to be 16bit aligned"));
|
|
|
|
if (operand->insert)
|
|
{
|
|
const char *errmsg = NULL;
|
|
|
|
insn = (*operand->insert) (insn, val, &errmsg);
|
|
if (errmsg)
|
|
as_warn_where (file, line, "%s", errmsg);
|
|
}
|
|
else
|
|
{
|
|
if (operand->flags & ARC_OPERAND_TRUNCATE)
|
|
{
|
|
if (operand->flags & ARC_OPERAND_ALIGNED32)
|
|
val >>= 2;
|
|
if (operand->flags & ARC_OPERAND_ALIGNED16)
|
|
val >>= 1;
|
|
}
|
|
insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
|
|
}
|
|
return insn;
|
|
}
|
|
|
|
/* Apply a fixup to the object code. At this point all symbol values
|
|
should be fully resolved, and we attempt to completely resolve the
|
|
reloc. If we can not do that, we determine the correct reloc code
|
|
and put it back in the fixup. To indicate that a fixup has been
|
|
eliminated, set fixP->fx_done. */
|
|
|
|
void
|
|
md_apply_fix (fixS *fixP,
|
|
valueT *valP,
|
|
segT seg)
|
|
{
|
|
char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
|
|
valueT value = *valP;
|
|
unsigned insn = 0;
|
|
symbolS *fx_addsy, *fx_subsy;
|
|
offsetT fx_offset;
|
|
segT add_symbol_segment = absolute_section;
|
|
segT sub_symbol_segment = absolute_section;
|
|
const struct arc_operand *operand = NULL;
|
|
extended_bfd_reloc_code_real_type reloc;
|
|
|
|
pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
|
|
fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
|
|
((int) fixP->fx_r_type < 0) ? "Internal":
|
|
bfd_get_reloc_code_name (fixP->fx_r_type), value,
|
|
fixP->fx_offset);
|
|
|
|
fx_addsy = fixP->fx_addsy;
|
|
fx_subsy = fixP->fx_subsy;
|
|
fx_offset = 0;
|
|
|
|
if (fx_addsy)
|
|
{
|
|
add_symbol_segment = S_GET_SEGMENT (fx_addsy);
|
|
}
|
|
|
|
if (fx_subsy
|
|
&& fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF
|
|
&& fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9
|
|
&& fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD)
|
|
{
|
|
resolve_symbol_value (fx_subsy);
|
|
sub_symbol_segment = S_GET_SEGMENT (fx_subsy);
|
|
|
|
if (sub_symbol_segment == absolute_section)
|
|
{
|
|
/* The symbol is really a constant. */
|
|
fx_offset -= S_GET_VALUE (fx_subsy);
|
|
fx_subsy = NULL;
|
|
}
|
|
else
|
|
{
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("can't resolve `%s' {%s section} - `%s' {%s section}"),
|
|
fx_addsy ? S_GET_NAME (fx_addsy) : "0",
|
|
segment_name (add_symbol_segment),
|
|
S_GET_NAME (fx_subsy),
|
|
segment_name (sub_symbol_segment));
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (fx_addsy
|
|
&& !S_IS_WEAK (fx_addsy))
|
|
{
|
|
if (add_symbol_segment == seg
|
|
&& fixP->fx_pcrel)
|
|
{
|
|
value += S_GET_VALUE (fx_addsy);
|
|
value -= md_pcrel_from_section (fixP, seg);
|
|
fx_addsy = NULL;
|
|
fixP->fx_pcrel = FALSE;
|
|
}
|
|
else if (add_symbol_segment == absolute_section)
|
|
{
|
|
value = fixP->fx_offset;
|
|
fx_offset += S_GET_VALUE (fixP->fx_addsy);
|
|
fx_addsy = NULL;
|
|
fixP->fx_pcrel = FALSE;
|
|
}
|
|
}
|
|
|
|
if (!fx_addsy)
|
|
fixP->fx_done = TRUE;
|
|
|
|
if (fixP->fx_pcrel)
|
|
{
|
|
if (fx_addsy
|
|
&& ((S_IS_DEFINED (fx_addsy)
|
|
&& S_GET_SEGMENT (fx_addsy) != seg)
|
|
|| S_IS_WEAK (fx_addsy)))
|
|
value += md_pcrel_from_section (fixP, seg);
|
|
|
|
switch (fixP->fx_r_type)
|
|
{
|
|
case BFD_RELOC_ARC_32_ME:
|
|
/* This is a pc-relative value in a LIMM. Adjust it to the
|
|
address of the instruction not to the address of the
|
|
LIMM. Note: it is not anylonger valid this afirmation as
|
|
the linker consider ARC_PC32 a fixup to entire 64 bit
|
|
insn. */
|
|
fixP->fx_offset += fixP->fx_frag->fr_address;
|
|
/* Fall through. */
|
|
case BFD_RELOC_32:
|
|
fixP->fx_r_type = BFD_RELOC_ARC_PC32;
|
|
/* Fall through. */
|
|
case BFD_RELOC_ARC_PC32:
|
|
/* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */
|
|
break;
|
|
default:
|
|
if ((int) fixP->fx_r_type < 0)
|
|
as_fatal (_("PC relative relocation not allowed for (internal) type %d"),
|
|
fixP->fx_r_type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
|
|
fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
|
|
((int) fixP->fx_r_type < 0) ? "Internal":
|
|
bfd_get_reloc_code_name (fixP->fx_r_type), value,
|
|
fixP->fx_offset);
|
|
|
|
|
|
/* Now check for TLS relocations. */
|
|
reloc = fixP->fx_r_type;
|
|
switch (reloc)
|
|
{
|
|
case BFD_RELOC_ARC_TLS_DTPOFF:
|
|
case BFD_RELOC_ARC_TLS_LE_32:
|
|
if (fixP->fx_done)
|
|
break;
|
|
/* Fall through. */
|
|
case BFD_RELOC_ARC_TLS_GD_GOT:
|
|
case BFD_RELOC_ARC_TLS_IE_GOT:
|
|
S_SET_THREAD_LOCAL (fixP->fx_addsy);
|
|
break;
|
|
|
|
case BFD_RELOC_ARC_TLS_GD_LD:
|
|
gas_assert (!fixP->fx_offset);
|
|
if (fixP->fx_subsy)
|
|
fixP->fx_offset
|
|
= (S_GET_VALUE (fixP->fx_subsy)
|
|
- fixP->fx_frag->fr_address- fixP->fx_where);
|
|
fixP->fx_subsy = NULL;
|
|
/* Fall through. */
|
|
case BFD_RELOC_ARC_TLS_GD_CALL:
|
|
/* These two relocs are there just to allow ld to change the tls
|
|
model for this symbol, by patching the code. The offset -
|
|
and scale, if any - will be installed by the linker. */
|
|
S_SET_THREAD_LOCAL (fixP->fx_addsy);
|
|
break;
|
|
|
|
case BFD_RELOC_ARC_TLS_LE_S9:
|
|
case BFD_RELOC_ARC_TLS_DTPOFF_S9:
|
|
as_bad (_("TLS_*_S9 relocs are not supported yet"));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!fixP->fx_done)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* Addjust the value if we have a constant. */
|
|
value += fx_offset;
|
|
|
|
/* For hosts with longs bigger than 32-bits make sure that the top
|
|
bits of a 32-bit negative value read in by the parser are set,
|
|
so that the correct comparisons are made. */
|
|
if (value & 0x80000000)
|
|
value |= (-1L << 31);
|
|
|
|
reloc = fixP->fx_r_type;
|
|
switch (reloc)
|
|
{
|
|
case BFD_RELOC_8:
|
|
case BFD_RELOC_16:
|
|
case BFD_RELOC_24:
|
|
case BFD_RELOC_32:
|
|
case BFD_RELOC_64:
|
|
case BFD_RELOC_ARC_32_PCREL:
|
|
md_number_to_chars (fixpos, value, fixP->fx_size);
|
|
return;
|
|
|
|
case BFD_RELOC_ARC_GOTPC32:
|
|
/* I cannot fix an GOTPC relocation because I need to relax it
|
|
from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */
|
|
as_bad (_("Unsupported operation on reloc"));
|
|
return;
|
|
|
|
case BFD_RELOC_ARC_TLS_DTPOFF:
|
|
case BFD_RELOC_ARC_TLS_LE_32:
|
|
gas_assert (!fixP->fx_addsy);
|
|
gas_assert (!fixP->fx_subsy);
|
|
|
|
case BFD_RELOC_ARC_GOTOFF:
|
|
case BFD_RELOC_ARC_32_ME:
|
|
case BFD_RELOC_ARC_PC32:
|
|
md_number_to_chars_midend (fixpos, value, fixP->fx_size);
|
|
return;
|
|
|
|
case BFD_RELOC_ARC_PLT32:
|
|
md_number_to_chars_midend (fixpos, value, fixP->fx_size);
|
|
return;
|
|
|
|
case BFD_RELOC_ARC_S25H_PCREL_PLT:
|
|
reloc = BFD_RELOC_ARC_S25W_PCREL;
|
|
goto solve_plt;
|
|
|
|
case BFD_RELOC_ARC_S21H_PCREL_PLT:
|
|
reloc = BFD_RELOC_ARC_S21H_PCREL;
|
|
goto solve_plt;
|
|
|
|
case BFD_RELOC_ARC_S25W_PCREL_PLT:
|
|
reloc = BFD_RELOC_ARC_S25W_PCREL;
|
|
goto solve_plt;
|
|
|
|
case BFD_RELOC_ARC_S21W_PCREL_PLT:
|
|
reloc = BFD_RELOC_ARC_S21W_PCREL;
|
|
|
|
case BFD_RELOC_ARC_S25W_PCREL:
|
|
case BFD_RELOC_ARC_S21W_PCREL:
|
|
case BFD_RELOC_ARC_S21H_PCREL:
|
|
case BFD_RELOC_ARC_S25H_PCREL:
|
|
case BFD_RELOC_ARC_S13_PCREL:
|
|
solve_plt:
|
|
operand = find_operand_for_reloc (reloc);
|
|
gas_assert (operand);
|
|
break;
|
|
|
|
default:
|
|
{
|
|
if ((int) fixP->fx_r_type >= 0)
|
|
as_fatal (_("unhandled relocation type %s"),
|
|
bfd_get_reloc_code_name (fixP->fx_r_type));
|
|
|
|
/* The rest of these fixups needs to be completely resolved as
|
|
constants. */
|
|
if (fixP->fx_addsy != 0
|
|
&& S_GET_SEGMENT (fixP->fx_addsy) != absolute_section)
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("non-absolute expression in constant field"));
|
|
|
|
gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands);
|
|
operand = &arc_operands[-(int) fixP->fx_r_type];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (target_big_endian)
|
|
{
|
|
switch (fixP->fx_size)
|
|
{
|
|
case 4:
|
|
insn = bfd_getb32 (fixpos);
|
|
break;
|
|
case 2:
|
|
insn = bfd_getb16 (fixpos);
|
|
break;
|
|
default:
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("unknown fixup size"));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
insn = 0;
|
|
switch (fixP->fx_size)
|
|
{
|
|
case 4:
|
|
insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2);
|
|
break;
|
|
case 2:
|
|
insn = bfd_getl16 (fixpos);
|
|
break;
|
|
default:
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("unknown fixup size"));
|
|
}
|
|
}
|
|
|
|
insn = insert_operand (insn, operand, (offsetT) value,
|
|
fixP->fx_file, fixP->fx_line);
|
|
|
|
md_number_to_chars_midend (fixpos, insn, fixP->fx_size);
|
|
}
|
|
|
|
/* Prepare machine-dependent frags for relaxation.
|
|
|
|
Called just before relaxation starts. Any symbol that is now undefined
|
|
will not become defined.
|
|
|
|
Return the correct fr_subtype in the frag.
|
|
|
|
Return the initial "guess for fr_var" to caller. The guess for fr_var
|
|
is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix
|
|
or fr_var contributes to our returned value.
|
|
|
|
Although it may not be explicit in the frag, pretend
|
|
fr_var starts with a value. */
|
|
|
|
int
|
|
md_estimate_size_before_relax (fragS *fragP,
|
|
segT segment)
|
|
{
|
|
int growth;
|
|
|
|
/* If the symbol is not located within the same section AND it's not
|
|
an absolute section, use the maximum. OR if the symbol is a
|
|
constant AND the insn is by nature not pc-rel, use the maximum.
|
|
OR if the symbol is being equated against another symbol, use the
|
|
maximum. OR if the symbol is weak use the maximum. */
|
|
if ((S_GET_SEGMENT (fragP->fr_symbol) != segment
|
|
&& S_GET_SEGMENT (fragP->fr_symbol) != absolute_section)
|
|
|| (symbol_constant_p (fragP->fr_symbol)
|
|
&& !fragP->tc_frag_data.pcrel)
|
|
|| symbol_equated_p (fragP->fr_symbol)
|
|
|| S_IS_WEAK (fragP->fr_symbol))
|
|
{
|
|
while (md_relax_table[fragP->fr_subtype].rlx_more != ARC_RLX_NONE)
|
|
++fragP->fr_subtype;
|
|
}
|
|
|
|
growth = md_relax_table[fragP->fr_subtype].rlx_length;
|
|
fragP->fr_var = growth;
|
|
|
|
pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n",
|
|
fragP->fr_file, fragP->fr_line, growth);
|
|
|
|
return growth;
|
|
}
|
|
|
|
/* Translate internal representation of relocation info to BFD target
|
|
format. */
|
|
|
|
arelent *
|
|
tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
|
|
fixS *fixP)
|
|
{
|
|
arelent *reloc;
|
|
bfd_reloc_code_real_type code;
|
|
|
|
reloc = (arelent *) xmalloc (sizeof (* reloc));
|
|
reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
|
|
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
|
|
reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
|
|
|
|
/* Make sure none of our internal relocations make it this far.
|
|
They'd better have been fully resolved by this point. */
|
|
gas_assert ((int) fixP->fx_r_type > 0);
|
|
|
|
code = fixP->fx_r_type;
|
|
|
|
/* if we have something like add gp, pcl,
|
|
_GLOBAL_OFFSET_TABLE_@gotpc. */
|
|
if (code == BFD_RELOC_ARC_GOTPC32
|
|
&& GOT_symbol
|
|
&& fixP->fx_addsy == GOT_symbol)
|
|
code = BFD_RELOC_ARC_GOTPC;
|
|
|
|
reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
|
|
if (reloc->howto == NULL)
|
|
{
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("cannot represent `%s' relocation in object file"),
|
|
bfd_get_reloc_code_name (code));
|
|
return NULL;
|
|
}
|
|
|
|
if (!fixP->fx_pcrel != !reloc->howto->pc_relative)
|
|
as_fatal (_("internal error? cannot generate `%s' relocation"),
|
|
bfd_get_reloc_code_name (code));
|
|
|
|
gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
|
|
|
|
if (code == BFD_RELOC_ARC_TLS_DTPOFF
|
|
|| code == BFD_RELOC_ARC_TLS_DTPOFF_S9)
|
|
{
|
|
asymbol *sym
|
|
= fixP->fx_subsy ? symbol_get_bfdsym (fixP->fx_subsy) : NULL;
|
|
/* We just want to store a 24 bit index, but we have to wait
|
|
till after write_contents has been called via
|
|
bfd_map_over_sections before we can get the index from
|
|
_bfd_elf_symbol_from_bfd_symbol. Thus, the write_relocs
|
|
function is elf32-arc.c has to pick up the slack.
|
|
Unfortunately, this leads to problems with hosts that have
|
|
pointers wider than long (bfd_vma). There would be various
|
|
ways to handle this, all error-prone :-( */
|
|
reloc->addend = (bfd_vma) sym;
|
|
if ((asymbol *) reloc->addend != sym)
|
|
{
|
|
as_bad ("Can't store pointer\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
reloc->addend = fixP->fx_offset;
|
|
|
|
return reloc;
|
|
}
|
|
|
|
/* Perform post-processing of machine-dependent frags after relaxation.
|
|
Called after relaxation is finished.
|
|
In: Address of frag.
|
|
fr_type == rs_machine_dependent.
|
|
fr_subtype is what the address relaxed to.
|
|
|
|
Out: Any fixS:s and constants are set up. */
|
|
|
|
void
|
|
md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
|
|
segT segment ATTRIBUTE_UNUSED,
|
|
fragS *fragP)
|
|
{
|
|
const relax_typeS *table_entry;
|
|
char *dest;
|
|
const struct arc_opcode *opcode;
|
|
struct arc_insn insn;
|
|
int size, fix;
|
|
struct arc_relax_type *relax_arg = &fragP->tc_frag_data;
|
|
|
|
fix = (fragP->fr_fix < 0 ? 0 : fragP->fr_fix);
|
|
dest = fragP->fr_literal + fix;
|
|
table_entry = TC_GENERIC_RELAX_TABLE + fragP->fr_subtype;
|
|
|
|
pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, var: %d\n",
|
|
fragP->fr_file, fragP->fr_line,
|
|
fragP->fr_subtype, fix, fragP->fr_var);
|
|
|
|
if (fragP->fr_subtype <= 0
|
|
&& fragP->fr_subtype >= arc_num_relax_opcodes)
|
|
as_fatal (_("no relaxation found for this instruction."));
|
|
|
|
opcode = &arc_relax_opcodes[fragP->fr_subtype];
|
|
|
|
assemble_insn (opcode, relax_arg->tok, relax_arg->ntok, relax_arg->pflags,
|
|
relax_arg->nflg, &insn);
|
|
|
|
apply_fixups (&insn, fragP, fix);
|
|
|
|
size = insn.short_insn ? (insn.has_limm ? 6 : 2) : (insn.has_limm ? 8 : 4);
|
|
gas_assert (table_entry->rlx_length == size);
|
|
emit_insn0 (&insn, dest, TRUE);
|
|
|
|
fragP->fr_fix += table_entry->rlx_length;
|
|
fragP->fr_var = 0;
|
|
}
|
|
|
|
/* We have no need to default values of symbols. We could catch
|
|
register names here, but that is handled by inserting them all in
|
|
the symbol table to begin with. */
|
|
|
|
symbolS *
|
|
md_undefined_symbol (char *name)
|
|
{
|
|
/* The arc abi demands that a GOT[0] should be referencible as
|
|
[pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a
|
|
GOTPC reference to _GLOBAL_OFFSET_TABLE_. */
|
|
if (((*name == '_')
|
|
&& (*(name+1) == 'G')
|
|
&& (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0))
|
|
|| ((*name == '_')
|
|
&& (*(name+1) == 'D')
|
|
&& (strcmp (name, DYNAMIC_STRUCT_NAME) == 0)))
|
|
{
|
|
if (!GOT_symbol)
|
|
{
|
|
if (symbol_find (name))
|
|
as_bad ("GOT already in symbol table");
|
|
|
|
GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section,
|
|
(valueT) 0, &zero_address_frag);
|
|
};
|
|
return GOT_symbol;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Turn a string in input_line_pointer into a floating point constant
|
|
of type type, and store the appropriate bytes in *litP. The number
|
|
of LITTLENUMS emitted is stored in *sizeP. An error message is
|
|
returned, or NULL on OK. */
|
|
|
|
char *
|
|
md_atof (int type, char *litP, int *sizeP)
|
|
{
|
|
return ieee_md_atof (type, litP, sizeP, target_big_endian);
|
|
}
|
|
|
|
/* Called for any expression that can not be recognized. When the
|
|
function is called, `input_line_pointer' will point to the start of
|
|
the expression. */
|
|
|
|
void
|
|
md_operand (expressionS *expressionP ATTRIBUTE_UNUSED)
|
|
{
|
|
char *p = input_line_pointer;
|
|
if (*p == '@')
|
|
{
|
|
input_line_pointer++;
|
|
expressionP->X_op = O_symbol;
|
|
expression (expressionP);
|
|
}
|
|
}
|
|
|
|
/* This function is called from the function 'expression', it attempts
|
|
to parse special names (in our case register names). It fills in
|
|
the expression with the identified register. It returns TRUE if
|
|
it is a register and FALSE otherwise. */
|
|
|
|
bfd_boolean
|
|
arc_parse_name (const char *name,
|
|
struct expressionS *e)
|
|
{
|
|
struct symbol *sym;
|
|
|
|
if (!assembling_insn)
|
|
return FALSE;
|
|
|
|
/* Handle only registers. */
|
|
if (e->X_op != O_absent)
|
|
return FALSE;
|
|
|
|
sym = hash_find (arc_reg_hash, name);
|
|
if (sym)
|
|
{
|
|
e->X_op = O_register;
|
|
e->X_add_number = S_GET_VALUE (sym);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* md_parse_option
|
|
Invocation line includes a switch not recognized by the base assembler.
|
|
See if it's a processor-specific option.
|
|
|
|
New options (supported) are:
|
|
|
|
-mcpu=<cpu name> Assemble for selected processor
|
|
-EB/-mbig-endian Big-endian
|
|
-EL/-mlittle-endian Little-endian
|
|
-mrelax Enable relaxation
|
|
|
|
The following CPU names are recognized:
|
|
arc700, av2em, av2hs. */
|
|
|
|
int
|
|
md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
|
|
{
|
|
int cpu_flags = EF_ARC_CPU_GENERIC;
|
|
|
|
switch (c)
|
|
{
|
|
case OPTION_ARC600:
|
|
case OPTION_ARC601:
|
|
return md_parse_option (OPTION_MCPU, "arc600");
|
|
|
|
case OPTION_ARC700:
|
|
return md_parse_option (OPTION_MCPU, "arc700");
|
|
|
|
case OPTION_ARCEM:
|
|
return md_parse_option (OPTION_MCPU, "arcem");
|
|
|
|
case OPTION_ARCHS:
|
|
return md_parse_option (OPTION_MCPU, "archs");
|
|
|
|
case OPTION_MCPU:
|
|
{
|
|
int i;
|
|
char *s = alloca (strlen (arg) + 1);
|
|
|
|
{
|
|
char *t = s;
|
|
char *arg1 = arg;
|
|
|
|
do
|
|
*t = TOLOWER (*arg1++);
|
|
while (*t++);
|
|
}
|
|
|
|
for (i = 0; cpu_types[i].name; ++i)
|
|
{
|
|
if (!strcmp (cpu_types[i].name, s))
|
|
{
|
|
arc_target = cpu_types[i].flags;
|
|
arc_target_name = cpu_types[i].name;
|
|
arc_features = cpu_types[i].features;
|
|
arc_mach_type = cpu_types[i].mach;
|
|
cpu_flags = cpu_types[i].eflags;
|
|
|
|
mach_type_specified_p = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!cpu_types[i].name)
|
|
{
|
|
as_fatal (_("unknown architecture: %s\n"), arg);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case OPTION_EB:
|
|
arc_target_format = "elf32-bigarc";
|
|
byte_order = BIG_ENDIAN;
|
|
break;
|
|
|
|
case OPTION_EL:
|
|
arc_target_format = "elf32-littlearc";
|
|
byte_order = LITTLE_ENDIAN;
|
|
break;
|
|
|
|
case OPTION_CD:
|
|
/* This option has an effect only on ARC EM. */
|
|
if (arc_target & ARC_OPCODE_ARCv2EM)
|
|
arc_features |= ARC_CD;
|
|
break;
|
|
|
|
case OPTION_RELAX:
|
|
relaxation_state = 1;
|
|
break;
|
|
|
|
case OPTION_USER_MODE:
|
|
case OPTION_LD_EXT_MASK:
|
|
case OPTION_SWAP:
|
|
case OPTION_NORM:
|
|
case OPTION_BARREL_SHIFT:
|
|
case OPTION_MIN_MAX:
|
|
case OPTION_NO_MPY:
|
|
case OPTION_EA:
|
|
case OPTION_MUL64:
|
|
case OPTION_SIMD:
|
|
case OPTION_SPFP:
|
|
case OPTION_DPFP:
|
|
case OPTION_XMAC_D16:
|
|
case OPTION_XMAC_24:
|
|
case OPTION_DSP_PACKA:
|
|
case OPTION_CRC:
|
|
case OPTION_DVBF:
|
|
case OPTION_TELEPHONY:
|
|
case OPTION_XYMEMORY:
|
|
case OPTION_LOCK:
|
|
case OPTION_SWAPE:
|
|
case OPTION_RTSC:
|
|
case OPTION_FPUDA:
|
|
/* Dummy options are accepted but have no effect. */
|
|
break;
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (cpu_flags != EF_ARC_CPU_GENERIC)
|
|
arc_eflag = (arc_eflag & ~EF_ARC_MACH_MSK) | cpu_flags;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
md_show_usage (FILE *stream)
|
|
{
|
|
fprintf (stream, _("ARC-specific assembler options:\n"));
|
|
|
|
fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name>\n");
|
|
fprintf (stream,
|
|
" -mcode-density\t enable code density option for ARC EM\n");
|
|
|
|
fprintf (stream, _("\
|
|
-EB assemble code for a big-endian cpu\n"));
|
|
fprintf (stream, _("\
|
|
-EL assemble code for a little-endian cpu\n"));
|
|
fprintf (stream, _("\
|
|
-mrelax Enable relaxation\n"));
|
|
|
|
}
|
|
|
|
/* Find the proper relocation for the given opcode. */
|
|
|
|
static extended_bfd_reloc_code_real_type
|
|
find_reloc (const char *name,
|
|
const char *opcodename,
|
|
const struct arc_flags *pflags,
|
|
int nflg,
|
|
extended_bfd_reloc_code_real_type reloc)
|
|
{
|
|
unsigned int i;
|
|
int j;
|
|
bfd_boolean found_flag, tmp;
|
|
extended_bfd_reloc_code_real_type ret = BFD_RELOC_UNUSED;
|
|
|
|
for (i = 0; i < arc_num_equiv_tab; i++)
|
|
{
|
|
const struct arc_reloc_equiv_tab *r = &arc_reloc_equiv[i];
|
|
|
|
/* Find the entry. */
|
|
if (strcmp (name, r->name))
|
|
continue;
|
|
if (r->mnemonic && (strcmp (r->mnemonic, opcodename)))
|
|
continue;
|
|
if (r->flags[0])
|
|
{
|
|
if (!nflg)
|
|
continue;
|
|
found_flag = FALSE;
|
|
unsigned * psflg = (unsigned *)r->flags;
|
|
do
|
|
{
|
|
tmp = FALSE;
|
|
for (j = 0; j < nflg; j++)
|
|
if (!strcmp (pflags[j].name,
|
|
arc_flag_operands[*psflg].name))
|
|
{
|
|
tmp = TRUE;
|
|
break;
|
|
}
|
|
if (!tmp)
|
|
{
|
|
found_flag = FALSE;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
found_flag = TRUE;
|
|
}
|
|
++ psflg;
|
|
} while (*psflg);
|
|
|
|
if (!found_flag)
|
|
continue;
|
|
}
|
|
|
|
if (reloc != r->oldreloc)
|
|
continue;
|
|
/* Found it. */
|
|
ret = r->newreloc;
|
|
break;
|
|
}
|
|
|
|
if (ret == BFD_RELOC_UNUSED)
|
|
as_bad (_("Unable to find %s relocation for instruction %s"),
|
|
name, opcodename);
|
|
return ret;
|
|
}
|
|
|
|
/* All the symbol types that are allowed to be used for
|
|
relaxation. */
|
|
|
|
static bfd_boolean
|
|
may_relax_expr (expressionS tok)
|
|
{
|
|
/* Check if we have unrelaxable relocs. */
|
|
switch (tok.X_md)
|
|
{
|
|
default:
|
|
break;
|
|
case O_plt:
|
|
return FALSE;
|
|
}
|
|
|
|
switch (tok.X_op)
|
|
{
|
|
case O_symbol:
|
|
case O_multiply:
|
|
case O_divide:
|
|
case O_modulus:
|
|
case O_add:
|
|
case O_subtract:
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Checks if flags are in line with relaxable insn. */
|
|
|
|
static bfd_boolean
|
|
relaxable_flag (const struct arc_relaxable_ins *ins,
|
|
const struct arc_flags *pflags,
|
|
int nflgs)
|
|
{
|
|
unsigned flag_class,
|
|
flag,
|
|
flag_class_idx = 0,
|
|
flag_idx = 0;
|
|
|
|
const struct arc_flag_operand *flag_opand;
|
|
int i, counttrue = 0;
|
|
|
|
/* Iterate through flags classes. */
|
|
while ((flag_class = ins->flag_classes[flag_class_idx]) != 0)
|
|
{
|
|
/* Iterate through flags in flag class. */
|
|
while ((flag = arc_flag_classes[flag_class].flags[flag_idx])
|
|
!= 0)
|
|
{
|
|
flag_opand = &arc_flag_operands[flag];
|
|
/* Iterate through flags in ins to compare. */
|
|
for (i = 0; i < nflgs; ++i)
|
|
{
|
|
if (strcmp (flag_opand->name, pflags[i].name) == 0)
|
|
++counttrue;
|
|
}
|
|
|
|
++flag_idx;
|
|
}
|
|
|
|
++flag_class_idx;
|
|
flag_idx = 0;
|
|
}
|
|
|
|
/* If counttrue == nflgs, then all flags have been found. */
|
|
return (counttrue == nflgs ? TRUE : FALSE);
|
|
}
|
|
|
|
/* Checks if operands are in line with relaxable insn. */
|
|
|
|
static bfd_boolean
|
|
relaxable_operand (const struct arc_relaxable_ins *ins,
|
|
const expressionS *tok,
|
|
int ntok)
|
|
{
|
|
const enum rlx_operand_type *operand = &ins->operands[0];
|
|
int i = 0;
|
|
|
|
while (*operand != EMPTY)
|
|
{
|
|
const expressionS *epr = &tok[i];
|
|
|
|
if (i != 0 && i >= ntok)
|
|
return FALSE;
|
|
|
|
switch (*operand)
|
|
{
|
|
case IMMEDIATE:
|
|
if (!(epr->X_op == O_multiply
|
|
|| epr->X_op == O_divide
|
|
|| epr->X_op == O_modulus
|
|
|| epr->X_op == O_add
|
|
|| epr->X_op == O_subtract
|
|
|| epr->X_op == O_symbol))
|
|
return FALSE;
|
|
break;
|
|
|
|
case REGISTER_DUP:
|
|
if ((i <= 0)
|
|
|| (epr->X_add_number != tok[i - 1].X_add_number))
|
|
return FALSE;
|
|
/* Fall through. */
|
|
case REGISTER:
|
|
if (epr->X_op != O_register)
|
|
return FALSE;
|
|
break;
|
|
|
|
case REGISTER_S:
|
|
if (epr->X_op != O_register)
|
|
return FALSE;
|
|
|
|
switch (epr->X_add_number)
|
|
{
|
|
case 0: case 1: case 2: case 3:
|
|
case 12: case 13: case 14: case 15:
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
break;
|
|
|
|
case REGISTER_NO_GP:
|
|
if ((epr->X_op != O_register)
|
|
|| (epr->X_add_number == 26)) /* 26 is the gp register. */
|
|
return FALSE;
|
|
break;
|
|
|
|
case BRACKET:
|
|
if (epr->X_op != O_bracket)
|
|
return FALSE;
|
|
break;
|
|
|
|
default:
|
|
/* Don't understand, bail out. */
|
|
return FALSE;
|
|
break;
|
|
}
|
|
|
|
++i;
|
|
operand = &ins->operands[i];
|
|
}
|
|
|
|
return (i == ntok ? TRUE : FALSE);
|
|
}
|
|
|
|
/* Return TRUE if this OPDCODE is a candidate for relaxation. */
|
|
|
|
static bfd_boolean
|
|
relax_insn_p (const struct arc_opcode *opcode,
|
|
const expressionS *tok,
|
|
int ntok,
|
|
const struct arc_flags *pflags,
|
|
int nflg)
|
|
{
|
|
unsigned i;
|
|
bfd_boolean rv = FALSE;
|
|
|
|
/* Check the relaxation table. */
|
|
for (i = 0; i < arc_num_relaxable_ins && relaxation_state; ++i)
|
|
{
|
|
const struct arc_relaxable_ins *arc_rlx_ins = &arc_relaxable_insns[i];
|
|
|
|
if ((strcmp (opcode->name, arc_rlx_ins->mnemonic_r) == 0)
|
|
&& may_relax_expr (tok[arc_rlx_ins->opcheckidx])
|
|
&& relaxable_operand (arc_rlx_ins, tok, ntok)
|
|
&& relaxable_flag (arc_rlx_ins, pflags, nflg))
|
|
{
|
|
rv = TRUE;
|
|
frag_now->fr_subtype = arc_relaxable_insns[i].subtype;
|
|
memcpy (&frag_now->tc_frag_data.tok, tok,
|
|
sizeof (expressionS) * ntok);
|
|
memcpy (&frag_now->tc_frag_data.pflags, pflags,
|
|
sizeof (struct arc_flags) * nflg);
|
|
frag_now->tc_frag_data.nflg = nflg;
|
|
frag_now->tc_frag_data.ntok = ntok;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* Turn an opcode description and a set of arguments into
|
|
an instruction and a fixup. */
|
|
|
|
static void
|
|
assemble_insn (const struct arc_opcode *opcode,
|
|
const expressionS *tok,
|
|
int ntok,
|
|
const struct arc_flags *pflags,
|
|
int nflg,
|
|
struct arc_insn *insn)
|
|
{
|
|
const expressionS *reloc_exp = NULL;
|
|
unsigned image;
|
|
const unsigned char *argidx;
|
|
int i;
|
|
int tokidx = 0;
|
|
unsigned char pcrel = 0;
|
|
bfd_boolean needGOTSymbol;
|
|
bfd_boolean has_delay_slot = FALSE;
|
|
extended_bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED;
|
|
|
|
memset (insn, 0, sizeof (*insn));
|
|
image = opcode->opcode;
|
|
|
|
pr_debug ("%s:%d: assemble_insn: %s using opcode %x\n",
|
|
frag_now->fr_file, frag_now->fr_line, opcode->name,
|
|
opcode->opcode);
|
|
|
|
/* Handle operands. */
|
|
for (argidx = opcode->operands; *argidx; ++argidx)
|
|
{
|
|
const struct arc_operand *operand = &arc_operands[*argidx];
|
|
const expressionS *t = (const expressionS *) 0;
|
|
|
|
if ((operand->flags & ARC_OPERAND_FAKE)
|
|
&& !(operand->flags & ARC_OPERAND_BRAKET))
|
|
continue;
|
|
|
|
if (operand->flags & ARC_OPERAND_DUPLICATE)
|
|
{
|
|
/* Duplicate operand, already inserted. */
|
|
tokidx ++;
|
|
continue;
|
|
}
|
|
|
|
if (tokidx >= ntok)
|
|
{
|
|
abort ();
|
|
}
|
|
else
|
|
t = &tok[tokidx++];
|
|
|
|
/* Regardless if we have a reloc or not mark the instruction
|
|
limm if it is the case. */
|
|
if (operand->flags & ARC_OPERAND_LIMM)
|
|
insn->has_limm = TRUE;
|
|
|
|
switch (t->X_op)
|
|
{
|
|
case O_register:
|
|
image = insert_operand (image, operand, regno (t->X_add_number),
|
|
NULL, 0);
|
|
break;
|
|
|
|
case O_constant:
|
|
image = insert_operand (image, operand, t->X_add_number, NULL, 0);
|
|
reloc_exp = t;
|
|
if (operand->flags & ARC_OPERAND_LIMM)
|
|
insn->limm = t->X_add_number;
|
|
break;
|
|
|
|
case O_bracket:
|
|
/* Ignore brackets. */
|
|
break;
|
|
|
|
case O_absent:
|
|
gas_assert (operand->flags & ARC_OPERAND_IGNORE);
|
|
break;
|
|
|
|
case O_subtract:
|
|
/* Maybe register range. */
|
|
if ((t->X_add_number == 0)
|
|
&& contains_register (t->X_add_symbol)
|
|
&& contains_register (t->X_op_symbol))
|
|
{
|
|
int regs;
|
|
|
|
regs = get_register (t->X_add_symbol);
|
|
regs <<= 16;
|
|
regs |= get_register (t->X_op_symbol);
|
|
image = insert_operand (image, operand, regs, NULL, 0);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
/* This operand needs a relocation. */
|
|
needGOTSymbol = FALSE;
|
|
|
|
switch (t->X_md)
|
|
{
|
|
case O_plt:
|
|
needGOTSymbol = TRUE;
|
|
reloc = find_reloc ("plt", opcode->name,
|
|
pflags, nflg,
|
|
operand->default_reloc);
|
|
break;
|
|
|
|
case O_gotoff:
|
|
case O_gotpc:
|
|
needGOTSymbol = TRUE;
|
|
reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
|
|
break;
|
|
case O_pcl:
|
|
reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
|
|
if (ARC_SHORT (opcode->mask))
|
|
as_bad_where (frag_now->fr_file, frag_now->fr_line,
|
|
_("Unable to use @pcl relocation for insn %s"),
|
|
opcode->name);
|
|
break;
|
|
case O_sda:
|
|
reloc = find_reloc ("sda", opcode->name,
|
|
pflags, nflg,
|
|
operand->default_reloc);
|
|
break;
|
|
case O_tlsgd:
|
|
case O_tlsie:
|
|
needGOTSymbol = TRUE;
|
|
/* Fall-through. */
|
|
|
|
case O_tpoff:
|
|
case O_dtpoff:
|
|
reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
|
|
break;
|
|
|
|
case O_tpoff9: /*FIXME! Check for the conditionality of
|
|
the insn. */
|
|
case O_dtpoff9: /*FIXME! Check for the conditionality of
|
|
the insn. */
|
|
as_bad (_("TLS_*_S9 relocs are not supported yet"));
|
|
break;
|
|
|
|
default:
|
|
/* Just consider the default relocation. */
|
|
reloc = operand->default_reloc;
|
|
break;
|
|
}
|
|
|
|
if (needGOTSymbol && (GOT_symbol == NULL))
|
|
GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
|
|
|
|
reloc_exp = t;
|
|
|
|
#if 0
|
|
if (reloc > 0)
|
|
{
|
|
/* sanity checks. */
|
|
reloc_howto_type *reloc_howto
|
|
= bfd_reloc_type_lookup (stdoutput,
|
|
(bfd_reloc_code_real_type) reloc);
|
|
unsigned reloc_bitsize = reloc_howto->bitsize;
|
|
if (reloc_howto->rightshift)
|
|
reloc_bitsize -= reloc_howto->rightshift;
|
|
if (reloc_bitsize != operand->bits)
|
|
{
|
|
as_bad (_("invalid relocation %s for field"),
|
|
bfd_get_reloc_code_name (reloc));
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
if (insn->nfixups >= MAX_INSN_FIXUPS)
|
|
as_fatal (_("too many fixups"));
|
|
|
|
struct arc_fixup *fixup;
|
|
fixup = &insn->fixups[insn->nfixups++];
|
|
fixup->exp = *t;
|
|
fixup->reloc = reloc;
|
|
pcrel = (operand->flags & ARC_OPERAND_PCREL) ? 1 : 0;
|
|
fixup->pcrel = pcrel;
|
|
fixup->islong = (operand->flags & ARC_OPERAND_LIMM) ?
|
|
TRUE : FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Handle flags. */
|
|
for (i = 0; i < nflg; i++)
|
|
{
|
|
const struct arc_flag_operand *flg_operand =
|
|
&arc_flag_operands[pflags[i].code];
|
|
|
|
/* Check if the instruction has a delay slot. */
|
|
if (!strcmp (flg_operand->name, "d"))
|
|
has_delay_slot = TRUE;
|
|
|
|
/* There is an exceptional case when we cannot insert a flag
|
|
just as it is. The .T flag must be handled in relation with
|
|
the relative address. */
|
|
if (!strcmp (flg_operand->name, "t")
|
|
|| !strcmp (flg_operand->name, "nt"))
|
|
{
|
|
unsigned bitYoperand = 0;
|
|
/* FIXME! move selection bbit/brcc in arc-opc.c. */
|
|
if (!strcmp (flg_operand->name, "t"))
|
|
if (!strcmp (opcode->name, "bbit0")
|
|
|| !strcmp (opcode->name, "bbit1"))
|
|
bitYoperand = arc_NToperand;
|
|
else
|
|
bitYoperand = arc_Toperand;
|
|
else
|
|
if (!strcmp (opcode->name, "bbit0")
|
|
|| !strcmp (opcode->name, "bbit1"))
|
|
bitYoperand = arc_Toperand;
|
|
else
|
|
bitYoperand = arc_NToperand;
|
|
|
|
gas_assert (reloc_exp != NULL);
|
|
if (reloc_exp->X_op == O_constant)
|
|
{
|
|
/* Check if we have a constant and solved it
|
|
immediately. */
|
|
offsetT val = reloc_exp->X_add_number;
|
|
image |= insert_operand (image, &arc_operands[bitYoperand],
|
|
val, NULL, 0);
|
|
}
|
|
else
|
|
{
|
|
struct arc_fixup *fixup;
|
|
|
|
if (insn->nfixups >= MAX_INSN_FIXUPS)
|
|
as_fatal (_("too many fixups"));
|
|
|
|
fixup = &insn->fixups[insn->nfixups++];
|
|
fixup->exp = *reloc_exp;
|
|
fixup->reloc = -bitYoperand;
|
|
fixup->pcrel = pcrel;
|
|
fixup->islong = FALSE;
|
|
}
|
|
}
|
|
else
|
|
image |= (flg_operand->code & ((1 << flg_operand->bits) - 1))
|
|
<< flg_operand->shift;
|
|
}
|
|
|
|
insn->relax = relax_insn_p (opcode, tok, ntok, pflags, nflg);
|
|
|
|
/* Short instruction? */
|
|
insn->short_insn = ARC_SHORT (opcode->mask) ? TRUE : FALSE;
|
|
|
|
insn->insn = image;
|
|
|
|
/* Update last insn status. */
|
|
arc_last_insns[1] = arc_last_insns[0];
|
|
arc_last_insns[0].opcode = opcode;
|
|
arc_last_insns[0].has_limm = insn->has_limm;
|
|
arc_last_insns[0].has_delay_slot = has_delay_slot;
|
|
|
|
/* Check if the current instruction is legally used. */
|
|
if (arc_last_insns[1].has_delay_slot
|
|
&& is_br_jmp_insn_p (arc_last_insns[0].opcode))
|
|
as_bad_where (frag_now->fr_file, frag_now->fr_line,
|
|
_("A jump/branch instruction in delay slot."));
|
|
}
|
|
|
|
void
|
|
arc_handle_align (fragS* fragP)
|
|
{
|
|
if ((fragP)->fr_type == rs_align_code)
|
|
{
|
|
char *dest = (fragP)->fr_literal + (fragP)->fr_fix;
|
|
valueT count = ((fragP)->fr_next->fr_address
|
|
- (fragP)->fr_address - (fragP)->fr_fix);
|
|
|
|
(fragP)->fr_var = 2;
|
|
|
|
if (count & 1)/* Padding in the gap till the next 2-byte
|
|
boundary with 0s. */
|
|
{
|
|
(fragP)->fr_fix++;
|
|
*dest++ = 0;
|
|
}
|
|
/* Writing nop_s. */
|
|
md_number_to_chars (dest, NOP_OPCODE_S, 2);
|
|
}
|
|
}
|
|
|
|
/* Here we decide which fixups can be adjusted to make them relative
|
|
to the beginning of the section instead of the symbol. Basically
|
|
we need to make sure that the dynamic relocations are done
|
|
correctly, so in some cases we force the original symbol to be
|
|
used. */
|
|
|
|
int
|
|
tc_arc_fix_adjustable (fixS *fixP)
|
|
{
|
|
|
|
/* Prevent all adjustments to global symbols. */
|
|
if (S_IS_EXTERNAL (fixP->fx_addsy))
|
|
return 0;
|
|
if (S_IS_WEAK (fixP->fx_addsy))
|
|
return 0;
|
|
|
|
/* Adjust_reloc_syms doesn't know about the GOT. */
|
|
switch (fixP->fx_r_type)
|
|
{
|
|
case BFD_RELOC_ARC_GOTPC32:
|
|
case BFD_RELOC_ARC_PLT32:
|
|
case BFD_RELOC_ARC_S25H_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S21H_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S25W_PCREL_PLT:
|
|
case BFD_RELOC_ARC_S21W_PCREL_PLT:
|
|
return 0;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Compute the reloc type of an expression EXP. */
|
|
|
|
static void
|
|
arc_check_reloc (expressionS *exp,
|
|
bfd_reloc_code_real_type *r_type_p)
|
|
{
|
|
if (*r_type_p == BFD_RELOC_32
|
|
&& exp->X_op == O_subtract
|
|
&& exp->X_op_symbol != NULL
|
|
&& exp->X_op_symbol->bsym->section == now_seg)
|
|
*r_type_p = BFD_RELOC_ARC_32_PCREL;
|
|
}
|
|
|
|
|
|
/* Add expression EXP of SIZE bytes to offset OFF of fragment FRAG. */
|
|
|
|
void
|
|
arc_cons_fix_new (fragS *frag,
|
|
int off,
|
|
int size,
|
|
expressionS *exp,
|
|
bfd_reloc_code_real_type r_type)
|
|
{
|
|
r_type = BFD_RELOC_UNUSED;
|
|
|
|
switch (size)
|
|
{
|
|
case 1:
|
|
r_type = BFD_RELOC_8;
|
|
break;
|
|
|
|
case 2:
|
|
r_type = BFD_RELOC_16;
|
|
break;
|
|
|
|
case 3:
|
|
r_type = BFD_RELOC_24;
|
|
break;
|
|
|
|
case 4:
|
|
r_type = BFD_RELOC_32;
|
|
arc_check_reloc (exp, &r_type);
|
|
break;
|
|
|
|
case 8:
|
|
r_type = BFD_RELOC_64;
|
|
break;
|
|
|
|
default:
|
|
as_bad (_("unsupported BFD relocation size %u"), size);
|
|
r_type = BFD_RELOC_UNUSED;
|
|
}
|
|
|
|
fix_new_exp (frag, off, size, exp, 0, r_type);
|
|
}
|
|
|
|
/* The actual routine that checks the ZOL conditions. */
|
|
|
|
static void
|
|
check_zol (symbolS *s)
|
|
{
|
|
switch (arc_mach_type)
|
|
{
|
|
case bfd_mach_arc_arcv2:
|
|
if (arc_target & ARC_OPCODE_ARCv2EM)
|
|
return;
|
|
|
|
if (is_br_jmp_insn_p (arc_last_insns[0].opcode)
|
|
|| arc_last_insns[1].has_delay_slot)
|
|
as_bad (_("Jump/Branch instruction detected at the end of the ZOL label @%s"),
|
|
S_GET_NAME (s));
|
|
|
|
break;
|
|
case bfd_mach_arc_arc600:
|
|
|
|
if (is_kernel_insn_p (arc_last_insns[0].opcode))
|
|
as_bad (_("Kernel instruction detected at the end of the ZOL label @%s"),
|
|
S_GET_NAME (s));
|
|
|
|
if (arc_last_insns[0].has_limm
|
|
&& is_br_jmp_insn_p (arc_last_insns[0].opcode))
|
|
as_bad (_("A jump instruction with long immediate detected at the \
|
|
end of the ZOL label @%s"), S_GET_NAME (s));
|
|
|
|
/* Fall through. */
|
|
case bfd_mach_arc_arc700:
|
|
if (arc_last_insns[0].has_delay_slot)
|
|
as_bad (_("An illegal use of delay slot detected at the end of the ZOL label @%s"),
|
|
S_GET_NAME (s));
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If ZOL end check the last two instruction for illegals. */
|
|
void
|
|
arc_frob_label (symbolS * sym)
|
|
{
|
|
if (ARC_GET_FLAG (sym) & ARC_FLAG_ZOL)
|
|
check_zol (sym);
|
|
|
|
dwarf2_emit_label (sym);
|
|
}
|
|
|
|
/* Used because generic relaxation assumes a pc-rel value whilst we
|
|
also relax instructions that use an absolute value resolved out of
|
|
relative values (if that makes any sense). An example: 'add r1,
|
|
r2, @.L2 - .' The symbols . and @.L2 are relative to the section
|
|
but if they're in the same section we can subtract the section
|
|
offset relocation which ends up in a resolved value. So if @.L2 is
|
|
.text + 0x50 and . is .text + 0x10, we can say that .text + 0x50 -
|
|
.text + 0x40 = 0x10. */
|
|
int
|
|
arc_pcrel_adjust (fragS *fragP)
|
|
{
|
|
if (!fragP->tc_frag_data.pcrel)
|
|
return fragP->fr_address + fragP->fr_fix;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Initialize the DWARF-2 unwind information for this procedure. */
|
|
|
|
void
|
|
tc_arc_frame_initial_instructions (void)
|
|
{
|
|
/* Stack pointer is register 28. */
|
|
cfi_add_CFA_def_cfa_register (28);
|
|
}
|
|
|
|
int
|
|
tc_arc_regname_to_dw2regnum (char *regname)
|
|
{
|
|
struct symbol *sym;
|
|
|
|
sym = hash_find (arc_reg_hash, regname);
|
|
if (sym)
|
|
return S_GET_VALUE (sym);
|
|
|
|
return -1;
|
|
}
|