diff options
Diffstat (limited to 'binutils-2.17/gas/config/tc-arc.c')
| -rw-r--r-- | binutils-2.17/gas/config/tc-arc.c | 1935 |
1 files changed, 0 insertions, 1935 deletions
diff --git a/binutils-2.17/gas/config/tc-arc.c b/binutils-2.17/gas/config/tc-arc.c deleted file mode 100644 index 525b5408..00000000 --- a/binutils-2.17/gas/config/tc-arc.c +++ /dev/null @@ -1,1935 +0,0 @@ -/* tc-arc.c -- Assembler for the ARC - Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, - 2006 Free Software Foundation, Inc. - Contributed by Doug Evans (dje@cygnus.com). - - This file is part of GAS, the GNU Assembler. - - GAS is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - GAS is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GAS; see the file COPYING. If not, write to the Free - Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA - 02110-1301, USA. */ - -#include <stdio.h> -#include "libiberty.h" -#include "as.h" -#include "struc-symbol.h" -#include "safe-ctype.h" -#include "subsegs.h" -#include "opcode/arc.h" -#include "../opcodes/arc-ext.h" -#include "elf/arc.h" -#include "dwarf2dbg.h" - -const struct suffix_classes -{ - char *name; - int len; -} suffixclass[] = -{ - { "SUFFIX_COND|SUFFIX_FLAG",23 }, - { "SUFFIX_FLAG", 11 }, - { "SUFFIX_COND", 11 }, - { "SUFFIX_NONE", 11 } -}; - -#define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes)) - -const struct syntax_classes -{ - char *name; - int len; - int class; -} syntaxclass[] = -{ - { "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID }, - { "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID }, - { "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID }, - { "OP1_IMM_IMPLIED|SYNTAX_2OP", 26, OP1_IMM_IMPLIED|SYNTAX_2OP|SYNTAX_VALID }, - { "SYNTAX_3OP", 10, SYNTAX_3OP|SYNTAX_VALID }, - { "SYNTAX_2OP", 10, SYNTAX_2OP|SYNTAX_VALID } -}; - -#define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes)) - -/* This array holds the chars that always start a comment. If the - pre-processor is disabled, these aren't very useful. */ -const char comment_chars[] = "#;"; - -/* This array holds the chars that only start a comment at the beginning of - a line. If the line seems to have the form '# 123 filename' - .line and .file directives will appear in the pre-processed output */ -/* Note that input_file.c hand checks for '#' at the beginning of the - first line of the input file. This is because the compiler outputs - #NO_APP at the beginning of its output. */ -/* Also note that comments started like this one will always - work if '/' isn't otherwise defined. */ -const char line_comment_chars[] = "#"; - -const char line_separator_chars[] = ""; - -/* Chars that can be used to separate mant from exp in floating point nums. */ -const char EXP_CHARS[] = "eE"; - -/* Chars that mean this number is a floating point constant - As in 0f12.456 or 0d1.2345e12. */ -const char FLT_CHARS[] = "rRsSfFdD"; - -/* Byte order. */ -extern int target_big_endian; -const char *arc_target_format = DEFAULT_TARGET_FORMAT; -static int byte_order = DEFAULT_BYTE_ORDER; - -static segT arcext_section; - -/* One of bfd_mach_arc_n. */ -static int arc_mach_type = bfd_mach_arc_6; - -/* Non-zero if the cpu type has been explicitly specified. */ -static int mach_type_specified_p = 0; - -/* Non-zero if opcode tables have been initialized. - A .option command must appear before any instructions. */ -static int cpu_tables_init_p = 0; - -static struct hash_control *arc_suffix_hash = NULL; - -const char *md_shortopts = ""; - -enum options -{ - OPTION_EB = OPTION_MD_BASE, - OPTION_EL, - OPTION_ARC5, - OPTION_ARC6, - OPTION_ARC7, - OPTION_ARC8, - OPTION_ARC -}; - -struct option md_longopts[] = -{ - { "EB", no_argument, NULL, OPTION_EB }, - { "EL", no_argument, NULL, OPTION_EL }, - { "marc5", no_argument, NULL, OPTION_ARC5 }, - { "pre-v6", no_argument, NULL, OPTION_ARC5 }, - { "marc6", no_argument, NULL, OPTION_ARC6 }, - { "marc7", no_argument, NULL, OPTION_ARC7 }, - { "marc8", no_argument, NULL, OPTION_ARC8 }, - { "marc", no_argument, NULL, OPTION_ARC }, - { NULL, no_argument, NULL, 0 } -}; -size_t md_longopts_size = sizeof (md_longopts); - -#define IS_SYMBOL_OPERAND(o) \ - ((o) == 'b' || (o) == 'c' || (o) == 's' || (o) == 'o' || (o) == 'O') - -struct arc_operand_value *get_ext_suffix (char *s); - -/* Invocation line includes a switch not recognized by the base assembler. - See if it's a processor-specific option. */ - -int -md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) -{ - switch (c) - { - case OPTION_ARC5: - arc_mach_type = bfd_mach_arc_5; - break; - case OPTION_ARC: - case OPTION_ARC6: - arc_mach_type = bfd_mach_arc_6; - break; - case OPTION_ARC7: - arc_mach_type = bfd_mach_arc_7; - break; - case OPTION_ARC8: - arc_mach_type = bfd_mach_arc_8; - break; - case OPTION_EB: - byte_order = BIG_ENDIAN; - arc_target_format = "elf32-bigarc"; - break; - case OPTION_EL: - byte_order = LITTLE_ENDIAN; - arc_target_format = "elf32-littlearc"; - break; - default: - return 0; - } - return 1; -} - -void -md_show_usage (FILE *stream) -{ - fprintf (stream, "\ -ARC Options:\n\ - -marc[5|6|7|8] select processor variant (default arc%d)\n\ - -EB assemble code for a big endian cpu\n\ - -EL assemble code for a little endian cpu\n", arc_mach_type + 5); -} - -/* This function is called once, at assembler startup time. It should - set up all the tables, etc. that the MD part of the assembler will need. - Opcode selection is deferred until later because we might see a .option - command. */ - -void -md_begin (void) -{ - /* 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"); - - /* This call is necessary because we need to initialize `arc_operand_map' - which may be needed before we see the first insn. */ - arc_opcode_init_tables (arc_get_opcode_mach (arc_mach_type, - target_big_endian)); -} - -/* Initialize the various opcode and operand tables. - MACH is one of bfd_mach_arc_xxx. */ - -static void -init_opcode_tables (int mach) -{ - int i; - char *last; - - if ((arc_suffix_hash = hash_new ()) == NULL) - as_fatal ("virtual memory exhausted"); - - if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) - as_warn ("could not set architecture and machine"); - - /* This initializes a few things in arc-opc.c that we need. - This must be called before the various arc_xxx_supported fns. */ - arc_opcode_init_tables (arc_get_opcode_mach (mach, target_big_endian)); - - /* Only put the first entry of each equivalently named suffix in the - table. */ - last = ""; - for (i = 0; i < arc_suffixes_count; i++) - { - if (strcmp (arc_suffixes[i].name, last) != 0) - hash_insert (arc_suffix_hash, arc_suffixes[i].name, (void *) (arc_suffixes + i)); - last = arc_suffixes[i].name; - } - - /* Since registers don't have a prefix, we put them in the symbol table so - they can't be used as symbols. This also simplifies argument parsing as - we can let gas parse registers for us. The recorded register number is - the address of the register's entry in arc_reg_names. - - If the register name is already in the table, then the existing - definition is assumed to be from an .ExtCoreRegister pseudo-op. */ - - for (i = 0; i < arc_reg_names_count; i++) - { - if (symbol_find (arc_reg_names[i].name)) - continue; - /* Use symbol_create here instead of symbol_new so we don't try to - output registers into the object file's symbol table. */ - symbol_table_insert (symbol_create (arc_reg_names[i].name, - reg_section, - (valueT) &arc_reg_names[i], - &zero_address_frag)); - } - - /* Tell `.option' it's too late. */ - cpu_tables_init_p = 1; -} - -/* Insert an operand value into an instruction. - If REG is non-NULL, it is a register number and ignore VAL. */ - -static arc_insn -arc_insert_operand (arc_insn insn, - const struct arc_operand *operand, - int mods, - const struct arc_operand_value *reg, - offsetT val, - char *file, - unsigned int line) -{ - if (operand->bits != 32) - { - long min, max; - offsetT test; - - if ((operand->flags & ARC_OPERAND_SIGNED) != 0) - { - if ((operand->flags & ARC_OPERAND_SIGNOPT) != 0) - max = (1 << operand->bits) - 1; - else - max = (1 << (operand->bits - 1)) - 1; - min = - (1 << (operand->bits - 1)); - } - else - { - max = (1 << operand->bits) - 1; - min = 0; - } - - if ((operand->flags & ARC_OPERAND_NEGATIVE) != 0) - test = - val; - else - test = val; - - if (test < (offsetT) min || test > (offsetT) max) - as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line); - } - - if (operand->insert) - { - const char *errmsg; - - errmsg = NULL; - insn = (*operand->insert) (insn, operand, mods, reg, (long) val, &errmsg); - if (errmsg != (const char *) NULL) - as_warn (errmsg); - } - else - insn |= (((long) val & ((1 << operand->bits) - 1)) - << operand->shift); - - return insn; -} - -/* We need to keep a list of fixups. We can't simply generate them as - we go, because that would require us to first create the frag, and - that would screw up references to ``.''. */ - -struct arc_fixup -{ - /* index into `arc_operands' */ - int opindex; - expressionS exp; -}; - -#define MAX_FIXUPS 5 - -#define MAX_SUFFIXES 5 - -/* Compute the reloc type of an expression. - The possibly modified expression is stored in EXPNEW. - - This is used to convert the expressions generated by the %-op's into - the appropriate operand type. It is called for both data in instructions - (operands) and data outside instructions (variables, debugging info, etc.). - - Currently supported %-ops: - - %st(symbol): represented as "symbol >> 2" - "st" is short for STatus as in the status register (pc) - - DEFAULT_TYPE is the type to use if no special processing is required. - - DATA_P is non-zero for data or limm values, zero for insn operands. - Remember that the opcode "insertion fns" cannot be used on data, they're - only for inserting operands into insns. They also can't be used for limm - values as the insertion routines don't handle limm values. When called for - insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When - called for data or limm values we use real reloc types. */ - -static int -get_arc_exp_reloc_type (int data_p, - int default_type, - expressionS *exp, - expressionS *expnew) -{ - /* If the expression is "symbol >> 2" we must change it to just "symbol", - as fix_new_exp can't handle it. Similarly for (symbol - symbol) >> 2. - That's ok though. What's really going on here is that we're using - ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */ - - if (exp->X_op == O_right_shift - && exp->X_op_symbol != NULL - && exp->X_op_symbol->sy_value.X_op == O_constant - && exp->X_op_symbol->sy_value.X_add_number == 2 - && exp->X_add_number == 0) - { - if (exp->X_add_symbol != NULL - && (exp->X_add_symbol->sy_value.X_op == O_constant - || exp->X_add_symbol->sy_value.X_op == O_symbol)) - { - *expnew = *exp; - expnew->X_op = O_symbol; - expnew->X_op_symbol = NULL; - return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; - } - else if (exp->X_add_symbol != NULL - && exp->X_add_symbol->sy_value.X_op == O_subtract) - { - *expnew = exp->X_add_symbol->sy_value; - return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; - } - } - - *expnew = *exp; - return default_type; -} - -static int -arc_set_ext_seg (void) -{ - if (!arcext_section) - { - arcext_section = subseg_new (".arcextmap", 0); - bfd_set_section_flags (stdoutput, arcext_section, - SEC_READONLY | SEC_HAS_CONTENTS); - } - else - subseg_set (arcext_section, 0); - return 1; -} - -static void -arc_extoper (int opertype) -{ - char *name; - char *mode; - char c; - char *p; - int imode = 0; - int number; - struct arc_ext_operand_value *ext_oper; - symbolS *symbolP; - - segT old_sec; - int old_subsec; - - name = input_line_pointer; - c = get_symbol_end (); - name = xstrdup (name); - - p = name; - while (*p) - { - *p = TOLOWER (*p); - p++; - } - - /* just after name is now '\0' */ - p = input_line_pointer; - *p = c; - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after operand name"); - ignore_rest_of_line (); - free (name); - return; - } - - input_line_pointer++; /* skip ',' */ - number = get_absolute_expression (); - - if (number < 0) - { - as_bad ("negative operand number %d", number); - ignore_rest_of_line (); - free (name); - return; - } - - if (opertype) - { - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after register-number"); - ignore_rest_of_line (); - free (name); - return; - } - - input_line_pointer++; /* skip ',' */ - mode = input_line_pointer; - - if (!strncmp (mode, "r|w", 3)) - { - imode = 0; - input_line_pointer += 3; - } - else - { - if (!strncmp (mode, "r", 1)) - { - imode = ARC_REGISTER_READONLY; - input_line_pointer += 1; - } - else - { - if (strncmp (mode, "w", 1)) - { - as_bad ("invalid mode"); - ignore_rest_of_line (); - free (name); - return; - } - else - { - imode = ARC_REGISTER_WRITEONLY; - input_line_pointer += 1; - } - } - } - SKIP_WHITESPACE (); - if (1 == opertype) - { - if (*input_line_pointer != ',') - { - as_bad ("expected comma after register-mode"); - ignore_rest_of_line (); - free (name); - return; - } - - input_line_pointer++; /* skip ',' */ - - if (!strncmp (input_line_pointer, "cannot_shortcut", 15)) - { - imode |= arc_get_noshortcut_flag (); - input_line_pointer += 15; - } - else - { - if (strncmp (input_line_pointer, "can_shortcut", 12)) - { - as_bad ("shortcut designator invalid"); - ignore_rest_of_line (); - free (name); - return; - } - else - { - input_line_pointer += 12; - } - } - } - } - - if ((opertype == 1) && number > 60) - { - as_bad ("core register value (%d) too large", number); - ignore_rest_of_line (); - free (name); - return; - } - - if ((opertype == 0) && number > 31) - { - as_bad ("condition code value (%d) too large", number); - ignore_rest_of_line (); - free (name); - return; - } - - ext_oper = xmalloc (sizeof (struct arc_ext_operand_value)); - - if (opertype) - { - /* If the symbol already exists, point it at the new definition. */ - if ((symbolP = symbol_find (name))) - { - if (S_GET_SEGMENT (symbolP) == reg_section) - S_SET_VALUE (symbolP, (valueT) &ext_oper->operand); - else - { - as_bad ("attempt to override symbol: %s", name); - ignore_rest_of_line (); - free (name); - free (ext_oper); - return; - } - } - else - { - /* If its not there, add it. */ - symbol_table_insert (symbol_create (name, reg_section, - (valueT) &ext_oper->operand, - &zero_address_frag)); - } - } - - ext_oper->operand.name = name; - ext_oper->operand.value = number; - ext_oper->operand.type = arc_operand_type (opertype); - ext_oper->operand.flags = imode; - - ext_oper->next = arc_ext_operands; - arc_ext_operands = ext_oper; - - /* OK, now that we know what this operand is, put a description in - the arc extension section of the output file. */ - - old_sec = now_seg; - old_subsec = now_subseg; - - arc_set_ext_seg (); - - switch (opertype) - { - case 0: - p = frag_more (1); - *p = 3 + strlen (name) + 1; - p = frag_more (1); - *p = EXT_COND_CODE; - p = frag_more (1); - *p = number; - p = frag_more (strlen (name) + 1); - strcpy (p, name); - break; - case 1: - p = frag_more (1); - *p = 3 + strlen (name) + 1; - p = frag_more (1); - *p = EXT_CORE_REGISTER; - p = frag_more (1); - *p = number; - p = frag_more (strlen (name) + 1); - strcpy (p, name); - break; - case 2: - p = frag_more (1); - *p = 6 + strlen (name) + 1; - p = frag_more (1); - *p = EXT_AUX_REGISTER; - p = frag_more (1); - *p = number >> 24 & 0xff; - p = frag_more (1); - *p = number >> 16 & 0xff; - p = frag_more (1); - *p = number >> 8 & 0xff; - p = frag_more (1); - *p = number & 0xff; - p = frag_more (strlen (name) + 1); - strcpy (p, name); - break; - default: - as_bad ("invalid opertype"); - ignore_rest_of_line (); - free (name); - return; - break; - } - - subseg_set (old_sec, old_subsec); - - /* Enter all registers into the symbol table. */ - - demand_empty_rest_of_line (); -} - -static void -arc_extinst (int ignore ATTRIBUTE_UNUSED) -{ - char syntax[129]; - char *name; - char *p; - char c; - int suffixcode = -1; - int opcode, subopcode; - int i; - int class = 0; - int name_len; - struct arc_opcode *ext_op; - - segT old_sec; - int old_subsec; - - name = input_line_pointer; - c = get_symbol_end (); - name = xstrdup (name); - strcpy (syntax, name); - name_len = strlen (name); - - /* just after name is now '\0' */ - p = input_line_pointer; - *p = c; - - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after operand name"); - ignore_rest_of_line (); - return; - } - - input_line_pointer++; /* skip ',' */ - opcode = get_absolute_expression (); - - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after opcode"); - ignore_rest_of_line (); - return; - } - - input_line_pointer++; /* skip ',' */ - subopcode = get_absolute_expression (); - - if (subopcode < 0) - { - as_bad ("negative subopcode %d", subopcode); - ignore_rest_of_line (); - return; - } - - if (subopcode) - { - if (3 != opcode) - { - as_bad ("subcode value found when opcode not equal 0x03"); - ignore_rest_of_line (); - return; - } - else - { - if (subopcode < 0x09 || subopcode == 0x3f) - { - as_bad ("invalid subopcode %d", subopcode); - ignore_rest_of_line (); - return; - } - } - } - - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after subopcode"); - ignore_rest_of_line (); - return; - } - - input_line_pointer++; /* skip ',' */ - - for (i = 0; i < (int) MAXSUFFIXCLASS; i++) - { - if (!strncmp (suffixclass[i].name,input_line_pointer, suffixclass[i].len)) - { - suffixcode = i; - input_line_pointer += suffixclass[i].len; - break; - } - } - - if (-1 == suffixcode) - { - as_bad ("invalid suffix class"); - ignore_rest_of_line (); - return; - } - - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after suffix class"); - ignore_rest_of_line (); - return; - } - - input_line_pointer++; /* skip ',' */ - - for (i = 0; i < (int) MAXSYNTAXCLASS; i++) - { - if (!strncmp (syntaxclass[i].name,input_line_pointer, syntaxclass[i].len)) - { - class = syntaxclass[i].class; - input_line_pointer += syntaxclass[i].len; - break; - } - } - - if (0 == (SYNTAX_VALID & class)) - { - as_bad ("invalid syntax class"); - ignore_rest_of_line (); - return; - } - - if ((0x3 == opcode) & (class & SYNTAX_3OP)) - { - as_bad ("opcode 0x3 and SYNTAX_3OP invalid"); - ignore_rest_of_line (); - return; - } - - switch (suffixcode) - { - case 0: - strcat (syntax, "%.q%.f "); - break; - case 1: - strcat (syntax, "%.f "); - break; - case 2: - strcat (syntax, "%.q "); - break; - case 3: - strcat (syntax, " "); - break; - default: - as_bad ("unknown suffix class"); - ignore_rest_of_line (); - return; - break; - }; - - strcat (syntax, ((opcode == 0x3) ? "%a,%b" : ((class & SYNTAX_3OP) ? "%a,%b,%c" : "%b,%c"))); - if (suffixcode < 2) - strcat (syntax, "%F"); - strcat (syntax, "%S%L"); - - ext_op = xmalloc (sizeof (struct arc_opcode)); - ext_op->syntax = xstrdup (syntax); - - ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0); - ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0); - ext_op->flags = class; - ext_op->next_asm = arc_ext_opcodes; - ext_op->next_dis = arc_ext_opcodes; - arc_ext_opcodes = ext_op; - - /* OK, now that we know what this inst is, put a description in the - arc extension section of the output file. */ - - old_sec = now_seg; - old_subsec = now_subseg; - - arc_set_ext_seg (); - - p = frag_more (1); - *p = 5 + name_len + 1; - p = frag_more (1); - *p = EXT_INSTRUCTION; - p = frag_more (1); - *p = opcode; - p = frag_more (1); - *p = subopcode; - p = frag_more (1); - *p = (class & (OP1_MUST_BE_IMM | OP1_IMM_IMPLIED) ? IGNORE_FIRST_OPD : 0); - p = frag_more (name_len); - strncpy (p, syntax, name_len); - p = frag_more (1); - *p = '\0'; - - subseg_set (old_sec, old_subsec); - - demand_empty_rest_of_line (); -} - -static void -arc_common (int localScope) -{ - char *name; - char c; - char *p; - int align, size; - symbolS *symbolP; - - name = input_line_pointer; - c = get_symbol_end (); - /* just after name is now '\0' */ - p = input_line_pointer; - *p = c; - SKIP_WHITESPACE (); - - if (*input_line_pointer != ',') - { - as_bad ("expected comma after symbol name"); - ignore_rest_of_line (); - return; - } - - input_line_pointer++; /* skip ',' */ - size = get_absolute_expression (); - - if (size < 0) - { - as_bad ("negative symbol length"); - ignore_rest_of_line (); - return; - } - - *p = 0; - symbolP = symbol_find_or_make (name); - *p = c; - - if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) - { - as_bad ("ignoring attempt to re-define symbol"); - ignore_rest_of_line (); - return; - } - if (((int) S_GET_VALUE (symbolP) != 0) \ - && ((int) S_GET_VALUE (symbolP) != size)) - { - as_warn ("length of symbol \"%s\" already %ld, ignoring %d", - S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); - } - assert (symbolP->sy_frag == &zero_address_frag); - - /* Now parse the alignment field. This field is optional for - local and global symbols. Default alignment is zero. */ - if (*input_line_pointer == ',') - { - input_line_pointer++; - align = get_absolute_expression (); - if (align < 0) - { - align = 0; - as_warn ("assuming symbol alignment of zero"); - } - } - else - align = 0; - - if (localScope != 0) - { - segT old_sec; - int old_subsec; - char *pfrag; - - old_sec = now_seg; - old_subsec = now_subseg; - record_alignment (bss_section, align); - subseg_set (bss_section, 0); /* ??? subseg_set (bss_section, 1); ??? */ - - if (align) - /* Do alignment. */ - frag_align (align, 0, 0); - - /* Detach from old frag. */ - if (S_GET_SEGMENT (symbolP) == bss_section) - symbolP->sy_frag->fr_symbol = NULL; - - symbolP->sy_frag = frag_now; - pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, - (offsetT) size, (char *) 0); - *pfrag = 0; - - S_SET_SIZE (symbolP, size); - S_SET_SEGMENT (symbolP, bss_section); - S_CLEAR_EXTERNAL (symbolP); - symbolP->local = 1; - subseg_set (old_sec, old_subsec); - } - else - { - S_SET_VALUE (symbolP, (valueT) size); - S_SET_ALIGN (symbolP, align); - S_SET_EXTERNAL (symbolP); - S_SET_SEGMENT (symbolP, bfd_com_section_ptr); - } - - symbolP->bsym->flags |= BSF_OBJECT; - - demand_empty_rest_of_line (); -} - -/* Select the cpu we're assembling for. */ - -static void -arc_option (int ignore ATTRIBUTE_UNUSED) -{ - extern int arc_get_mach (char *); - int mach; - char c; - char *cpu; - - cpu = input_line_pointer; - c = get_symbol_end (); - mach = arc_get_mach (cpu); - *input_line_pointer = c; - - /* If an instruction has already been seen, it's too late. */ - if (cpu_tables_init_p) - { - as_bad ("\".option\" directive must appear before any instructions"); - ignore_rest_of_line (); - return; - } - - if (mach == -1) - goto bad_cpu; - - if (mach_type_specified_p && mach != arc_mach_type) - { - as_bad ("\".option\" directive conflicts with initial definition"); - ignore_rest_of_line (); - return; - } - else - { - /* The cpu may have been selected on the command line. */ - if (mach != arc_mach_type) - as_warn ("\".option\" directive overrides command-line (default) value"); - arc_mach_type = mach; - if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) - as_fatal ("could not set architecture and machine"); - mach_type_specified_p = 1; - } - demand_empty_rest_of_line (); - return; - - bad_cpu: - as_bad ("invalid identifier for \".option\""); - ignore_rest_of_line (); -} - -/* 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. */ - -/* Equal to MAX_PRECISION in atof-ieee.c */ -#define MAX_LITTLENUMS 6 - -char * -md_atof (int type, char *litP, int *sizeP) -{ - int prec; - LITTLENUM_TYPE words[MAX_LITTLENUMS]; - LITTLENUM_TYPE *wordP; - char *t; - - switch (type) - { - case 'f': - case 'F': - prec = 2; - break; - - case 'd': - case 'D': - prec = 4; - break; - - default: - *sizeP = 0; - return "bad call to md_atof"; - } - - t = atof_ieee (input_line_pointer, type, words); - if (t) - input_line_pointer = t; - *sizeP = prec * sizeof (LITTLENUM_TYPE); - for (wordP = words; prec--;) - { - md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE)); - litP += sizeof (LITTLENUM_TYPE); - } - - return NULL; -} - -/* 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) & (-1 << align)); -} - -/* We don't have any form of relaxing. */ - -int -md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, - asection *seg ATTRIBUTE_UNUSED) -{ - as_fatal (_("md_estimate_size_before_relax\n")); - return 1; -} - -/* Convert a machine dependent frag. We never generate these. */ - -void -md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, - asection *sec ATTRIBUTE_UNUSED, - fragS *fragp ATTRIBUTE_UNUSED) -{ - as_fatal (_("md_convert_frag\n")); -} - -static void -arc_code_symbol (expressionS *expressionP) -{ - if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0) - { - expressionS two; - - expressionP->X_op = O_right_shift; - expressionP->X_add_symbol->sy_value.X_op = O_constant; - two.X_op = O_constant; - two.X_add_symbol = two.X_op_symbol = NULL; - two.X_add_number = 2; - expressionP->X_op_symbol = make_expr_symbol (&two); - } - /* Allow %st(sym1-sym2) */ - else if (expressionP->X_op == O_subtract - && expressionP->X_add_symbol != NULL - && expressionP->X_op_symbol != NULL - && expressionP->X_add_number == 0) - { - expressionS two; - - expressionP->X_add_symbol = make_expr_symbol (expressionP); - expressionP->X_op = O_right_shift; - two.X_op = O_constant; - two.X_add_symbol = two.X_op_symbol = NULL; - two.X_add_number = 2; - expressionP->X_op_symbol = make_expr_symbol (&two); - } - else - as_bad ("expression too complex code symbol"); -} - -/* Parse an operand that is machine-specific. - - The ARC has a special %-op to adjust addresses so they're usable in - branches. The "st" is short for the STatus register. - ??? Later expand this to take a flags value too. - - ??? We can't create new expression types so we map the %-op's onto the - existing syntax. This means that the user could use the chosen syntax - to achieve the same effect. */ - -void -md_operand (expressionS *expressionP) -{ - char *p = input_line_pointer; - - if (*p != '%') - return; - - if (strncmp (p, "%st(", 4) == 0) - { - input_line_pointer += 4; - expression (expressionP); - if (*input_line_pointer != ')') - { - as_bad ("missing ')' in %%-op"); - return; - } - ++input_line_pointer; - arc_code_symbol (expressionP); - } - else - { - /* It could be a register. */ - int i, l; - struct arc_ext_operand_value *ext_oper = arc_ext_operands; - p++; - - while (ext_oper) - { - l = strlen (ext_oper->operand.name); - if (!strncmp (p, ext_oper->operand.name, l) && !ISALNUM (*(p + l))) - { - input_line_pointer += l + 1; - expressionP->X_op = O_register; - expressionP->X_add_number = (offsetT) &ext_oper->operand; - return; - } - ext_oper = ext_oper->next; - } - for (i = 0; i < arc_reg_names_count; i++) - { - l = strlen (arc_reg_names[i].name); - if (!strncmp (p, arc_reg_names[i].name, l) && !ISALNUM (*(p + l))) - { - input_line_pointer += l + 1; - expressionP->X_op = O_register; - expressionP->X_add_number = (offsetT) &arc_reg_names[i]; - break; - } - } - } -} - -/* 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 ATTRIBUTE_UNUSED) -{ - return 0; -} - -/* Functions concerning expressions. */ - -/* Parse a .byte, .word, etc. expression. - - Values for the status register are specified with %st(label). - `label' will be right shifted by 2. */ - -void -arc_parse_cons_expression (expressionS *exp, - unsigned int nbytes ATTRIBUTE_UNUSED) -{ - char *p = input_line_pointer; - int code_symbol_fix = 0; - - for (; ! is_end_of_line[(unsigned char) *p]; p++) - if (*p == '@' && !strncmp (p, "@h30", 4)) - { - code_symbol_fix = 1; - strcpy (p, "; "); - } - expression_and_evaluate (exp); - if (code_symbol_fix) - { - arc_code_symbol (exp); - input_line_pointer = p; - } -} - -/* Record a fixup for a cons expression. */ - -void -arc_cons_fix_new (fragS *frag, - int where, - int nbytes, - expressionS *exp) -{ - if (nbytes == 4) - { - int reloc_type; - expressionS exptmp; - - /* This may be a special ARC reloc (eg: %st()). */ - reloc_type = get_arc_exp_reloc_type (1, BFD_RELOC_32, exp, &exptmp); - fix_new_exp (frag, where, nbytes, &exptmp, 0, reloc_type); - } - else - { - fix_new_exp (frag, where, nbytes, exp, 0, - nbytes == 2 ? BFD_RELOC_16 - : nbytes == 8 ? BFD_RELOC_64 - : BFD_RELOC_32); - } -} - -/* Functions concerning relocs. */ - -/* The location from which a PC relative jump should be calculated, - given a PC relative reloc. */ - -long -md_pcrel_from (fixS *fixP) -{ - /* Return the address of the delay slot. */ - return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; -} - -/* Apply a fixup to the object code. This is called for all the - fixups we generated by the call to fix_new_exp, above. In the call - above we used a reloc code which was the largest legal reloc code - plus the operand index. Here we undo that to recover the operand - index. 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. */ - -void -md_apply_fix (fixS *fixP, valueT * valP, segT seg) -{ - valueT value = * valP; - - if (fixP->fx_addsy == (symbolS *) NULL) - fixP->fx_done = 1; - - else if (fixP->fx_pcrel) - { - /* Hack around bfd_install_relocation brain damage. */ - if (S_GET_SEGMENT (fixP->fx_addsy) != seg) - value += md_pcrel_from (fixP); - } - - /* We can't actually support subtracting a symbol. */ - if (fixP->fx_subsy != NULL) - as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); - - if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) - { - int opindex; - const struct arc_operand *operand; - char *where; - arc_insn insn; - - opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; - - operand = &arc_operands[opindex]; - - /* Fetch the instruction, insert the fully resolved operand - value, and stuff the instruction back again. */ - where = fixP->fx_frag->fr_literal + fixP->fx_where; - if (target_big_endian) - insn = bfd_getb32 ((unsigned char *) where); - else - insn = bfd_getl32 ((unsigned char *) where); - insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value, - fixP->fx_file, fixP->fx_line); - if (target_big_endian) - bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); - else - bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); - - if (fixP->fx_done) - /* Nothing else to do here. */ - return; - - /* Determine a BFD reloc value based on the operand information. - We are only prepared to turn a few of the operands into relocs. - !!! Note that we can't handle limm values here. Since we're using - implicit addends the addend must be inserted into the instruction, - however, the opcode insertion routines currently do nothing with - limm values. */ - if (operand->fmt == 'B') - { - assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0 - && operand->bits == 20 - && operand->shift == 7); - fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL; - } - else if (operand->fmt == 'J') - { - assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0 - && operand->bits == 24 - && operand->shift == 32); - fixP->fx_r_type = BFD_RELOC_ARC_B26; - } - else if (operand->fmt == 'L') - { - assert ((operand->flags & ARC_OPERAND_LIMM) != 0 - && operand->bits == 32 - && operand->shift == 32); - fixP->fx_r_type = BFD_RELOC_32; - } - else - { - as_bad_where (fixP->fx_file, fixP->fx_line, - "unresolved expression that must be resolved"); - fixP->fx_done = 1; - return; - } - } - else - { - switch (fixP->fx_r_type) - { - case BFD_RELOC_8: - md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, - value, 1); - break; - case BFD_RELOC_16: - md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, - value, 2); - break; - case BFD_RELOC_32: - md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, - value, 4); - break; - case BFD_RELOC_ARC_B26: - /* If !fixP->fx_done then `value' is an implicit addend. - We must shift it right by 2 in this case as well because the - linker performs the relocation and then adds this in (as opposed - to adding this in and then shifting right by 2). */ - value >>= 2; - md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, - value, 4); - break; - default: - abort (); - } - } -} - -/* Translate internal representation of relocation info to BFD target - format. */ - -arelent * -tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, - fixS *fixP) -{ - arelent *reloc; - - reloc = xmalloc (sizeof (arelent)); - reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); - - *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); - reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; - reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); - if (reloc->howto == (reloc_howto_type *) NULL) - { - as_bad_where (fixP->fx_file, fixP->fx_line, - "internal error: can't export reloc type %d (`%s')", - fixP->fx_r_type, - bfd_get_reloc_code_name (fixP->fx_r_type)); - return NULL; - } - - assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); - - /* Set addend to account for PC being advanced one insn before the - target address is computed. */ - - reloc->addend = (fixP->fx_pcrel ? -4 : 0); - - return reloc; -} - -const pseudo_typeS md_pseudo_table[] = -{ - { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ - { "comm", arc_common, 0 }, - { "common", arc_common, 0 }, - { "lcomm", arc_common, 1 }, - { "lcommon", arc_common, 1 }, - { "2byte", cons, 2 }, - { "half", cons, 2 }, - { "short", cons, 2 }, - { "3byte", cons, 3 }, - { "4byte", cons, 4 }, - { "word", cons, 4 }, - { "option", arc_option, 0 }, - { "cpu", arc_option, 0 }, - { "block", s_space, 0 }, - { "extcondcode", arc_extoper, 0 }, - { "extcoreregister", arc_extoper, 1 }, - { "extauxregister", arc_extoper, 2 }, - { "extinstruction", arc_extinst, 0 }, - { NULL, 0, 0 }, -}; - -/* This routine is called for each instruction to be assembled. */ - -void -md_assemble (char *str) -{ - const struct arc_opcode *opcode; - const struct arc_opcode *std_opcode; - struct arc_opcode *ext_opcode; - char *start; - const char *last_errmsg = 0; - arc_insn insn; - static int init_tables_p = 0; - - /* Opcode table initialization is deferred until here because we have to - wait for a possible .option command. */ - if (!init_tables_p) - { - init_opcode_tables (arc_mach_type); - init_tables_p = 1; - } - - /* Skip leading white space. */ - while (ISSPACE (*str)) - str++; - - /* The instructions are stored in lists hashed by the first letter (though - we needn't care how they're hashed). Get the first in the list. */ - - ext_opcode = arc_ext_opcodes; - std_opcode = arc_opcode_lookup_asm (str); - - /* Keep looking until we find a match. */ - start = str; - for (opcode = (ext_opcode ? ext_opcode : std_opcode); - opcode != NULL; - opcode = (ARC_OPCODE_NEXT_ASM (opcode) - ? ARC_OPCODE_NEXT_ASM (opcode) - : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL))) - { - int past_opcode_p, fc, num_suffixes; - int fix_up_at = 0; - char *syn; - struct arc_fixup fixups[MAX_FIXUPS]; - /* Used as a sanity check. If we need a limm reloc, make sure we ask - for an extra 4 bytes from frag_more. */ - int limm_reloc_p; - int ext_suffix_p; - const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES]; - - /* Is this opcode supported by the selected cpu? */ - if (! arc_opcode_supported (opcode)) - continue; - - /* Scan the syntax string. If it doesn't match, try the next one. */ - arc_opcode_init_insert (); - insn = opcode->value; - fc = 0; - past_opcode_p = 0; - num_suffixes = 0; - limm_reloc_p = 0; - ext_suffix_p = 0; - - /* We don't check for (*str != '\0') here because we want to parse - any trailing fake arguments in the syntax string. */ - for (str = start, syn = opcode->syntax; *syn != '\0';) - { - int mods; - const struct arc_operand *operand; - - /* Non operand chars must match exactly. */ - if (*syn != '%' || *++syn == '%') - { - if (*str == *syn) - { - if (*syn == ' ') - past_opcode_p = 1; - ++syn; - ++str; - } - else - break; - continue; - } - - /* We have an operand. Pick out any modifiers. */ - mods = 0; - while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags)) - { - mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS; - ++syn; - } - operand = arc_operands + arc_operand_map[(int) *syn]; - if (operand->fmt == 0) - as_fatal ("unknown syntax format character `%c'", *syn); - - if (operand->flags & ARC_OPERAND_FAKE) - { - const char *errmsg = NULL; - if (operand->insert) - { - insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg); - if (errmsg != (const char *) NULL) - { - last_errmsg = errmsg; - if (operand->flags & ARC_OPERAND_ERROR) - { - as_bad (errmsg); - return; - } - else if (operand->flags & ARC_OPERAND_WARN) - as_warn (errmsg); - break; - } - if (limm_reloc_p - && (operand->flags && operand->flags & ARC_OPERAND_LIMM) - && (operand->flags & - (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS))) - { - fixups[fix_up_at].opindex = arc_operand_map[operand->fmt]; - } - } - ++syn; - } - /* Are we finished with suffixes? */ - else if (!past_opcode_p) - { - int found; - char c; - char *s, *t; - const struct arc_operand_value *suf, *suffix_end; - const struct arc_operand_value *suffix = NULL; - - if (!(operand->flags & ARC_OPERAND_SUFFIX)) - abort (); - - /* If we're at a space in the input string, we want to skip the - remaining suffixes. There may be some fake ones though, so - just go on to try the next one. */ - if (*str == ' ') - { - ++syn; - continue; - } - - s = str; - if (mods & ARC_MOD_DOT) - { - if (*s != '.') - break; - ++s; - } - else - { - /* This can happen in "b.nd foo" and we're currently looking - for "%q" (ie: a condition code suffix). */ - if (*s == '.') - { - ++syn; - continue; - } - } - - /* Pick the suffix out and look it up via the hash table. */ - for (t = s; *t && ISALNUM (*t); ++t) - continue; - c = *t; - *t = '\0'; - if ((suf = get_ext_suffix (s))) - ext_suffix_p = 1; - else - suf = hash_find (arc_suffix_hash, s); - if (!suf) - { - /* This can happen in "blle foo" and we're currently using - the template "b%q%.n %j". The "bl" insn occurs later in - the table so "lle" isn't an illegal suffix. */ - *t = c; - break; - } - - /* Is it the right type? Note that the same character is used - several times, so we have to examine all of them. This is - relatively efficient as equivalent entries are kept - together. If it's not the right type, don't increment `str' - so we try the next one in the series. */ - found = 0; - if (ext_suffix_p && arc_operands[suf->type].fmt == *syn) - { - /* Insert the suffix's value into the insn. */ - *t = c; - if (operand->insert) - insn = (*operand->insert) (insn, operand, - mods, NULL, suf->value, - NULL); - else - insn |= suf->value << operand->shift; - suffix = suf; - str = t; - found = 1; - } - else - { - *t = c; - suffix_end = arc_suffixes + arc_suffixes_count; - for (suffix = suf; - suffix < suffix_end && strcmp (suffix->name, suf->name) == 0; - ++suffix) - { - if (arc_operands[suffix->type].fmt == *syn) - { - /* Insert the suffix's value into the insn. */ - if (operand->insert) - insn = (*operand->insert) (insn, operand, - mods, NULL, suffix->value, - NULL); - else - insn |= suffix->value << operand->shift; - - str = t; - found = 1; - break; - } - } - } - ++syn; - if (!found) - /* Wrong type. Just go on to try next insn entry. */ - ; - else - { - if (num_suffixes == MAX_SUFFIXES) - as_bad ("too many suffixes"); - else - insn_suffixes[num_suffixes++] = suffix; - } - } - else - /* This is either a register or an expression of some kind. */ - { - char *hold; - const struct arc_operand_value *reg = NULL; - long value = 0; - expressionS exp; - - if (operand->flags & ARC_OPERAND_SUFFIX) - abort (); - - /* Is there anything left to parse? - We don't check for this at the top because we want to parse - any trailing fake arguments in the syntax string. */ - if (is_end_of_line[(unsigned char) *str]) - break; - - /* Parse the operand. */ - hold = input_line_pointer; - input_line_pointer = str; - expression (&exp); - str = input_line_pointer; - input_line_pointer = hold; - - if (exp.X_op == O_illegal) - as_bad ("illegal operand"); - else if (exp.X_op == O_absent) - as_bad ("missing operand"); - else if (exp.X_op == O_constant) - value = exp.X_add_number; - else if (exp.X_op == O_register) - reg = (struct arc_operand_value *) exp.X_add_number; -#define IS_REG_DEST_OPERAND(o) ((o) == 'a') - else if (IS_REG_DEST_OPERAND (*syn)) - as_bad ("symbol as destination register"); - else - { - if (!strncmp (str, "@h30", 4)) - { - arc_code_symbol (&exp); - str += 4; - } - /* We need to generate a fixup for this expression. */ - if (fc >= MAX_FIXUPS) - as_fatal ("too many fixups"); - fixups[fc].exp = exp; - /* We don't support shimm relocs. break here to force - the assembler to output a limm. */ -#define IS_REG_SHIMM_OFFSET(o) ((o) == 'd') - if (IS_REG_SHIMM_OFFSET (*syn)) - break; - /* If this is a register constant (IE: one whose - register value gets stored as 61-63) then this - must be a limm. */ - /* ??? This bit could use some cleaning up. - Referencing the format chars like this goes - against style. */ - if (IS_SYMBOL_OPERAND (*syn)) - { - const char *junk; - limm_reloc_p = 1; - /* Save this, we don't yet know what reloc to use. */ - fix_up_at = fc; - /* Tell insert_reg we need a limm. This is - needed because the value at this point is - zero, a shimm. */ - /* ??? We need a cleaner interface than this. */ - (*arc_operands[arc_operand_map['Q']].insert) - (insn, operand, mods, reg, 0L, &junk); - } - else - fixups[fc].opindex = arc_operand_map[(int) *syn]; - ++fc; - value = 0; - } - - /* Insert the register or expression into the instruction. */ - if (operand->insert) - { - const char *errmsg = NULL; - insn = (*operand->insert) (insn, operand, mods, - reg, (long) value, &errmsg); - if (errmsg != (const char *) NULL) - { - last_errmsg = errmsg; - if (operand->flags & ARC_OPERAND_ERROR) - { - as_bad (errmsg); - return; - } - else if (operand->flags & ARC_OPERAND_WARN) - as_warn (errmsg); - break; - } - } - else - insn |= (value & ((1 << operand->bits) - 1)) << operand->shift; - - ++syn; - } - } - - /* If we're at the end of the syntax string, we're done. */ - /* FIXME: try to move this to a separate function. */ - if (*syn == '\0') - { - int i; - char *f; - long limm, limm_p; - - /* For the moment we assume a valid `str' can only contain blanks - now. IE: We needn't try again with a longer version of the - insn and it is assumed that longer versions of insns appear - before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ - - while (ISSPACE (*str)) - ++str; - - if (!is_end_of_line[(unsigned char) *str]) - as_bad ("junk at end of line: `%s'", str); - - /* Is there a limm value? */ - limm_p = arc_opcode_limm_p (&limm); - - /* Perform various error and warning tests. */ - - { - static int in_delay_slot_p = 0; - static int prev_insn_needs_cc_nop_p = 0; - /* delay slot type seen */ - int delay_slot_type = ARC_DELAY_NONE; - /* conditional execution flag seen */ - int conditional = 0; - /* 1 if condition codes are being set */ - int cc_set_p = 0; - /* 1 if conditional branch, including `b' "branch always" */ - int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH; - - for (i = 0; i < num_suffixes; ++i) - { - switch (arc_operands[insn_suffixes[i]->type].fmt) - { - case 'n': - delay_slot_type = insn_suffixes[i]->value; - break; - case 'q': - conditional = insn_suffixes[i]->value; - break; - case 'f': - cc_set_p = 1; - break; - } - } - - /* Putting an insn with a limm value in a delay slot is supposed to - be legal, but let's warn the user anyway. Ditto for 8 byte - jumps with delay slots. */ - if (in_delay_slot_p && limm_p) - as_warn ("8 byte instruction in delay slot"); - if (delay_slot_type != ARC_DELAY_NONE - && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */ - as_warn ("8 byte jump instruction with delay slot"); - in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p; - - /* Warn when a conditional branch immediately follows a set of - the condition codes. Note that this needn't be done if the - insn that sets the condition codes uses a limm. */ - if (cond_branch_p && conditional != 0 /* 0 = "always" */ - && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5) - as_warn ("conditional branch follows set of flags"); - prev_insn_needs_cc_nop_p = - /* FIXME: ??? not required: - (delay_slot_type != ARC_DELAY_NONE) && */ - cc_set_p && !limm_p; - } - - /* Write out the instruction. - It is important to fetch enough space in one call to `frag_more'. - We use (f - frag_now->fr_literal) to compute where we are and we - don't want frag_now to change between calls. */ - if (limm_p) - { - f = frag_more (8); - md_number_to_chars (f, insn, 4); - md_number_to_chars (f + 4, limm, 4); - dwarf2_emit_insn (8); - } - else if (limm_reloc_p) - /* We need a limm reloc, but the tables think we don't. */ - abort (); - else - { - f = frag_more (4); - md_number_to_chars (f, insn, 4); - dwarf2_emit_insn (4); - } - - /* Create any fixups. */ - for (i = 0; i < fc; ++i) - { - int op_type, reloc_type; - expressionS exptmp; - const struct arc_operand *operand; - - /* Create a fixup for this operand. - At this point we do not use a bfd_reloc_code_real_type for - operands residing in the insn, but instead just use the - operand index. This lets us easily handle fixups for any - operand type, although that is admittedly not a very exciting - feature. We pick a BFD reloc type in md_apply_fix. - - Limm values (4 byte immediate "constants") must be treated - normally because they're not part of the actual insn word - and thus the insertion routines don't handle them. */ - - if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM) - { - /* Modify the fixup addend as required by the cpu. */ - fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn); - op_type = fixups[i].opindex; - /* FIXME: can we add this data to the operand table? */ - if (op_type == arc_operand_map['L'] - || op_type == arc_operand_map['s'] - || op_type == arc_operand_map['o'] - || op_type == arc_operand_map['O']) - reloc_type = BFD_RELOC_32; - else if (op_type == arc_operand_map['J']) - reloc_type = BFD_RELOC_ARC_B26; - else - abort (); - reloc_type = get_arc_exp_reloc_type (1, reloc_type, - &fixups[i].exp, - &exptmp); - } - else - { - op_type = get_arc_exp_reloc_type (0, fixups[i].opindex, - &fixups[i].exp, &exptmp); - reloc_type = op_type + (int) BFD_RELOC_UNUSED; - } - operand = &arc_operands[op_type]; - fix_new_exp (frag_now, - ((f - frag_now->fr_literal) - + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4, - &exptmp, - (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0, - (bfd_reloc_code_real_type) reloc_type); - } - return; - } - } - - if (NULL == last_errmsg) - as_bad ("bad instruction `%s'", start); - else - as_bad (last_errmsg); -} |