X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gas%2Fconfig%2Ftc-arc.c;h=17f67391a12d9c418f1a735dfda3f4ddf3e5c7de;hb=ea1562b345338540cf9a3c8fa28fbcb6da78fd3e;hp=3e829fac24818b10515b112d21eeb39263157367;hpb=94f592af1baedbbe3957436c713fd58c02d55ef9;p=binutils-gdb.git diff --git a/gas/config/tc-arc.c b/gas/config/tc-arc.c index 3e829fac248..17f67391a12 100644 --- a/gas/config/tc-arc.c +++ b/gas/config/tc-arc.c @@ -1,5 +1,5 @@ /* tc-arc.c -- Assembler for the ARC - Copyright 1994, 1995, 1997, 1999, 2000, 2001 + Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. Contributed by Doug Evans (dje@cygnus.com). @@ -23,6 +23,7 @@ #include #include "libiberty.h" #include "as.h" +#include "struc-symbol.h" #include "safe-ctype.h" #include "subsegs.h" #include "opcode/arc.h" @@ -30,31 +31,12 @@ #include "elf/arc.h" #include "dwarf2dbg.h" -extern int arc_get_mach PARAMS ((char *)); -extern int arc_operand_type PARAMS ((int)); -extern int arc_insn_not_jl PARAMS ((arc_insn)); -extern int arc_limm_fixup_adjust PARAMS ((arc_insn)); -extern int arc_get_noshortcut_flag PARAMS ((void)); -extern int arc_set_ext_seg PARAMS ((void)); -extern void arc_code_symbol PARAMS ((expressionS *)); - -static arc_insn arc_insert_operand PARAMS ((arc_insn, - const struct arc_operand *, int, - const struct arc_operand_value *, - offsetT, char *, unsigned int)); -static void arc_common PARAMS ((int)); -static void arc_extinst PARAMS ((int)); -static void arc_extoper PARAMS ((int)); -static void arc_option PARAMS ((int)); -static int get_arc_exp_reloc_type PARAMS ((int, int, expressionS *, - expressionS *)); - -static void init_opcode_tables PARAMS ((int)); - -const struct suffix_classes { +const struct suffix_classes +{ char *name; int len; -} suffixclass[] = { +} suffixclass[] = +{ { "SUFFIX_COND|SUFFIX_FLAG",23 }, { "SUFFIX_FLAG", 11 }, { "SUFFIX_COND", 11 }, @@ -63,11 +45,13 @@ const struct suffix_classes { #define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes)) -const struct syntax_classes { +const struct syntax_classes +{ char *name; int len; int class; -} syntaxclass[] = { +} 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 }, @@ -78,30 +62,6 @@ const struct syntax_classes { #define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes)) -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 }, - { "file", dwarf2_directive_file, 0 }, - { "loc", dwarf2_directive_loc, 0 }, - { "extcondcode", arc_extoper, 0 }, - { "extcoreregister", arc_extoper, 1 }, - { "extauxregister", arc_extoper, 2 }, - { "extinstruction", arc_extinst, 0 }, - { NULL, 0, 0 }, -}; - /* 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[] = "#;"; @@ -145,21 +105,27 @@ static int cpu_tables_init_p = 0; static struct hash_control *arc_suffix_hash = NULL; const char *md_shortopts = ""; -struct option md_longopts[] = { -#define OPTION_EB (OPTION_MD_BASE + 0) + +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 }, -#define OPTION_EL (OPTION_MD_BASE + 1) { "EL", no_argument, NULL, OPTION_EL }, -#define OPTION_ARC5 (OPTION_MD_BASE + 2) { "marc5", no_argument, NULL, OPTION_ARC5 }, { "pre-v6", no_argument, NULL, OPTION_ARC5 }, -#define OPTION_ARC6 (OPTION_MD_BASE + 3) { "marc6", no_argument, NULL, OPTION_ARC6 }, -#define OPTION_ARC7 (OPTION_MD_BASE + 4) { "marc7", no_argument, NULL, OPTION_ARC7 }, -#define OPTION_ARC8 (OPTION_MD_BASE + 5) { "marc8", no_argument, NULL, OPTION_ARC8 }, -#define OPTION_ARC (OPTION_MD_BASE + 6) { "marc", no_argument, NULL, OPTION_ARC }, { NULL, no_argument, NULL, 0 } }; @@ -174,9 +140,7 @@ struct arc_operand_value *get_ext_suffix (char *s); See if it's a processor-specific option. */ int -md_parse_option (c, arg) - int c; - char *arg ATTRIBUTE_UNUSED; +md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) { switch (c) { @@ -208,8 +172,7 @@ md_parse_option (c, arg) } void -md_show_usage (stream) - FILE *stream; +md_show_usage (FILE *stream) { fprintf (stream, "\ ARC Options:\n\ @@ -224,7 +187,7 @@ ARC Options:\n\ command. */ void -md_begin () +md_begin (void) { /* The endianness can be chosen "at the factory". */ target_big_endian = byte_order == BIG_ENDIAN; @@ -240,9 +203,9 @@ md_begin () /* Initialize the various opcode and operand tables. MACH is one of bfd_mach_arc_xxx. */ + static void -init_opcode_tables (mach) - int mach; +init_opcode_tables (int mach) { int i; char *last; @@ -263,7 +226,7 @@ init_opcode_tables (mach) 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, (PTR) (arc_suffixes + i)); + hash_insert (arc_suffix_hash, arc_suffixes[i].name, (void *) (arc_suffixes + i)); last = arc_suffixes[i].name; } @@ -295,14 +258,13 @@ init_opcode_tables (mach) If REG is non-NULL, it is a register number and ignore VAL. */ static arc_insn -arc_insert_operand (insn, operand, mods, reg, val, file, line) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - offsetT val; - char *file; - unsigned int line; +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) { @@ -329,17 +291,7 @@ arc_insert_operand (insn, operand, mods, reg, val, file, line) test = val; if (test < (offsetT) min || test > (offsetT) max) - { - const char *err = - "operand out of range (%s not between %ld and %ld)"; - char buf[100]; - - sprint_value (buf, test); - if (file == (char *) NULL) - as_warn (err, buf, min, max); - else - as_warn_where (file, line, err, buf, min, max); - } + as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line); } if (operand->insert) @@ -362,7 +314,8 @@ arc_insert_operand (insn, operand, mods, reg, val, file, line) we go, because that would require us to first create the frag, and that would screw up references to ``.''. */ -struct arc_fixup { +struct arc_fixup +{ /* index into `arc_operands' */ int opindex; expressionS exp; @@ -372,533 +325,331 @@ struct arc_fixup { #define MAX_SUFFIXES 5 -/* This routine is called for each instruction to be assembled. */ +/* Compute the reloc type of an expression. + The possibly modified expression is stored in EXPNEW. -void -md_assemble (str) - char *str; + 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) { - 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; + /* 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. */ - /* Opcode table initialization is deferred until here because we have to - wait for a possible .option command. */ - if (!init_tables_p) + 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) { - init_opcode_tables (arc_mach_type); - init_tables_p = 1; + 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']; + } } - /* Skip leading white space. */ - while (ISSPACE (*str)) - str++; + *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; +} - /* 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. */ +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; - ext_opcode = arc_ext_opcodes; - std_opcode = arc_opcode_lookup_asm (str); + segT old_sec; + int old_subsec; - /* Keep looking until we find a match. */ + name = input_line_pointer; + c = get_symbol_end (); + name = xstrdup (name); - 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))) + p = name; + while (*p) { - 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]; + *p = TOLOWER (*p); + p++; + } - /* Is this opcode supported by the selected cpu? */ - if (! arc_opcode_supported (opcode)) - continue; + /* just after name is now '\0' */ + p = input_line_pointer; + *p = c; + SKIP_WHITESPACE (); - /* Scan the syntax string. If it doesn't match, try the next one. */ + if (*input_line_pointer != ',') + { + as_bad ("expected comma after operand name"); + ignore_rest_of_line (); + free (name); + return; + } - arc_opcode_init_insert (); - insn = opcode->value; - fc = 0; - past_opcode_p = 0; - num_suffixes = 0; - limm_reloc_p = 0; - ext_suffix_p = 0; + input_line_pointer++; /* skip ',' */ + number = get_absolute_expression (); - /* 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';) + 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 != ',') { - int mods; - const struct arc_operand *operand; + as_bad ("expected comma after register-number"); + ignore_rest_of_line (); + free (name); + return; + } - /* Non operand chars must match exactly. */ - if (*syn != '%' || *++syn == '%') + 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 { - /* Handle '+' specially as we want to allow "ld r0,[sp-4]". */ - /* ??? The syntax has changed to [sp,-4]. */ - if (0 && *syn == '+' && *str == '-') + if (strncmp (mode, "w", 1)) { - /* Skip over syn's +, but leave str's - alone. - That makes the case identical to "ld r0,[sp+-4]". */ - ++syn; + as_bad ("invalid mode"); + ignore_rest_of_line (); + free (name); + return; } - else if (*str == *syn) + else { - if (*syn == ' ') - past_opcode_p = 1; - ++syn; - ++str; + imode = ARC_REGISTER_WRITEONLY; + input_line_pointer += 1; } - 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)) + } + SKIP_WHITESPACE (); + if (1 == opertype) + { + if (*input_line_pointer != ',') { - mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS; - ++syn; + as_bad ("expected comma after register-mode"); + ignore_rest_of_line (); + free (name); + return; } - 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) + input_line_pointer++; /* skip ',' */ + + if (!strncmp (input_line_pointer, "cannot_shortcut", 15)) { - 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; + imode |= arc_get_noshortcut_flag (); + input_line_pointer += 15; } - /* Are we finished with suffixes? */ - else if (!past_opcode_p) + else { - 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 (strncmp (input_line_pointer, "can_shortcut", 12)) { - if (*s != '.') - break; - ++s; + as_bad ("shortcut designator invalid"); + ignore_rest_of_line (); + free (name); + return; } else { - /* This can happen in "b.nd foo" and we're currently looking - for "%q" (ie: a condition code suffix). */ - if (*s == '.') - { - ++syn; - continue; - } + input_line_pointer += 12; } + } + } + } - /* 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; - } + if ((opertype == 1) && number > 60) + { + as_bad ("core register value (%d) too large", number); + ignore_rest_of_line (); + free (name); + return; + } - /* 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; + if ((opertype == 0) && number > 31) + { + as_bad ("condition code value (%d) too large", number); + ignore_rest_of_line (); + free (name); + return; + } - 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; + ext_oper = xmalloc (sizeof (struct arc_ext_operand_value)); - 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; - } - } + 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, (int) &ext_oper->operand); 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; + 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, + (int) &ext_oper->operand, &zero_address_frag)); + } + } - if (operand->flags & ARC_OPERAND_SUFFIX) - abort (); + ext_oper->operand.name = name; + ext_oper->operand.value = number; + ext_oper->operand.type = arc_operand_type (opertype); + ext_oper->operand.flags = imode; - /* 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; + ext_oper->next = arc_ext_operands; + arc_ext_operands = ext_oper; - /* Parse the operand. */ - hold = input_line_pointer; - input_line_pointer = str; - expression (&exp); - str = input_line_pointer; - input_line_pointer = hold; + /* OK, now that we know what this operand is, put a description in + the arc extension section of the output file. */ - 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; - } + old_sec = now_seg; + old_subsec = now_subseg; - /* 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_fix3. - - 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. */ + arc_set_ext_seg (); - 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); - } + 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; + } - /* All done. */ - return; - } + subseg_set (old_sec, old_subsec); - /* Try the next entry. */ - } + /* Enter all registers into the symbol table. */ - if (NULL == last_errmsg) - as_bad ("bad instruction `%s'", start); - else - as_bad (last_errmsg); + demand_empty_rest_of_line (); } - + static void -arc_extoper (opertype) - int opertype; +arc_extinst (int ignore ATTRIBUTE_UNUSED) { + char syntax[129]; char *name; - char *mode; - char c; char *p; - int imode = 0; - int number; - struct arc_ext_operand_value *ext_oper; - symbolS *symbolP; + 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; @@ -906,266 +657,13 @@ arc_extoper (opertype) name = input_line_pointer; c = get_symbol_end (); name = xstrdup (name); - if (NULL == name) - { - ignore_rest_of_line (); - return; - } - - p = name; - while (*p) - { - *p = TOLOWER (*p); - p++; - } + 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 (); - 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 = (struct arc_ext_operand_value *) \ - 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, (int) &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, - (int) &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 (ignore) - int ignore ATTRIBUTE_UNUSED; -{ - unsigned 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); - if (NULL == name) - { - ignore_rest_of_line (); - return; - } - 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 != ',') @@ -1305,19 +803,8 @@ arc_extinst (ignore) strcat (syntax, "%F"); strcat (syntax, "%S%L"); - ext_op = (struct arc_opcode *) xmalloc (sizeof (struct arc_opcode)); - if (NULL == ext_op) - { - ignore_rest_of_line (); - return; - } - + ext_op = xmalloc (sizeof (struct arc_opcode)); ext_op->syntax = xstrdup (syntax); - if (NULL == ext_op->syntax) - { - ignore_rest_of_line (); - return; - } ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0); ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0); @@ -1354,23 +841,8 @@ arc_extinst (ignore) demand_empty_rest_of_line (); } -int -arc_set_ext_seg () -{ - 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_common (localScope) - int localScope; +static void +arc_common (int localScope) { char *name; char c; @@ -1476,15 +948,14 @@ arc_common (localScope) symbolP->bsym->flags |= BSF_OBJECT; demand_empty_rest_of_line (); - return; } /* Select the cpu we're assembling for. */ static void -arc_option (ignore) - int ignore ATTRIBUTE_UNUSED; +arc_option (int ignore ATTRIBUTE_UNUSED) { + extern int arc_get_mach (char *); int mach; char c; char *cpu; @@ -1538,16 +1009,12 @@ arc_option (ignore) #define MAX_LITTLENUMS 6 char * -md_atof (type, litP, sizeP) - int type; - char *litP; - int *sizeP; +md_atof (int type, char *litP, int *sizeP) { int prec; LITTLENUM_TYPE words[MAX_LITTLENUMS]; LITTLENUM_TYPE *wordP; char *t; - char * atof_ieee PARAMS ((char *, int, LITTLENUM_TYPE *)); switch (type) { @@ -1583,10 +1050,7 @@ md_atof (type, litP, sizeP) endianness. */ void -md_number_to_chars (buf, val, n) - char *buf; - valueT val; - int n; +md_number_to_chars (char *buf, valueT val, int n) { if (target_big_endian) number_to_chars_bigendian (buf, val, n); @@ -1597,9 +1061,7 @@ md_number_to_chars (buf, val, n) /* Round up a section size to the appropriate boundary. */ valueT -md_section_align (segment, size) - segT segment; - valueT size; +md_section_align (segT segment, valueT size) { int align = bfd_get_section_alignment (stdoutput, segment); @@ -1609,9 +1071,8 @@ md_section_align (segment, size) /* We don't have any form of relaxing. */ int -md_estimate_size_before_relax (fragp, seg) - fragS *fragp ATTRIBUTE_UNUSED; - asection *seg ATTRIBUTE_UNUSED; +md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, + asection *seg ATTRIBUTE_UNUSED) { as_fatal (_("md_estimate_size_before_relax\n")); return 1; @@ -1620,21 +1081,20 @@ md_estimate_size_before_relax (fragp, seg) /* Convert a machine dependent frag. We never generate these. */ void -md_convert_frag (abfd, sec, fragp) - bfd *abfd ATTRIBUTE_UNUSED; - asection *sec ATTRIBUTE_UNUSED; - fragS *fragp ATTRIBUTE_UNUSED; +md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, + asection *sec ATTRIBUTE_UNUSED, + fragS *fragp ATTRIBUTE_UNUSED) { as_fatal (_("md_convert_frag\n")); } -void -arc_code_symbol (expressionP) - expressionS *expressionP; +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; @@ -1649,6 +1109,7 @@ arc_code_symbol (expressionP) && 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; @@ -1657,10 +1118,7 @@ arc_code_symbol (expressionP) expressionP->X_op_symbol = make_expr_symbol (&two); } else - { - as_bad ("expression too complex code symbol"); - return; - } + as_bad ("expression too complex code symbol"); } /* Parse an operand that is machine-specific. @@ -1674,55 +1132,56 @@ arc_code_symbol (expressionP) to achieve the same effect. */ void -md_operand (expressionP) - expressionS *expressionP; +md_operand (expressionS *expressionP) { char *p = input_line_pointer; - if (*p == '%') - 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++; + if (*p != '%') + return; - 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 = (int) &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 = (int) &arc_reg_names[i]; - break; - } - } - } + 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 = (int) &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 = (int) &arc_reg_names[i]; + break; + } + } + } } /* We have no need to default values of symbols. @@ -1730,8 +1189,7 @@ md_operand (expressionP) them all in the symbol table to begin with. */ symbolS * -md_undefined_symbol (name) - char *name ATTRIBUTE_UNUSED; +md_undefined_symbol (char *name ATTRIBUTE_UNUSED) { return 0; } @@ -1744,9 +1202,8 @@ md_undefined_symbol (name) `label' will be right shifted by 2. */ void -arc_parse_cons_expression (exp, nbytes) - expressionS *exp; - unsigned int nbytes ATTRIBUTE_UNUSED; +arc_parse_cons_expression (expressionS *exp, + unsigned int nbytes ATTRIBUTE_UNUSED) { char *p = input_line_pointer; int code_symbol_fix = 0; @@ -1768,11 +1225,10 @@ arc_parse_cons_expression (exp, nbytes) /* Record a fixup for a cons expression. */ void -arc_cons_fix_new (frag, where, nbytes, exp) - fragS *frag; - int where; - int nbytes; - expressionS *exp; +arc_cons_fix_new (fragS *frag, + int where, + int nbytes, + expressionS *exp) { if (nbytes == 4) { @@ -1798,80 +1254,12 @@ arc_cons_fix_new (frag, where, nbytes, exp) given a PC relative reloc. */ long -md_pcrel_from (fixP) - fixS *fixP; +md_pcrel_from (fixS *fixP) { - if (fixP->fx_addsy != (symbolS *) NULL - && ! S_IS_DEFINED (fixP->fx_addsy)) - { - /* The symbol is undefined. Let the linker figure it out. */ - return 0; - } - /* Return the address of the delay slot. */ return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; } -/* 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 (data_p, default_type, exp, expnew) - 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. Similarily 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; -} - /* 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 @@ -1881,55 +1269,23 @@ get_arc_exp_reloc_type (data_p, default_type, exp, expnew) that, we determine the correct reloc code and put it back in the fixup. */ void -md_apply_fix3 (fixP, valP, seg) - fixS *fixP; - valueT * valP; - segT seg; +md_apply_fix3 (fixS *fixP, valueT * valP, segT seg) { -#if 0 - char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; -#endif valueT value = * valP; - /* FIXME FIXME FIXME: The value we are passed in *valueP includes - the symbol values. Since we are using BFD_ASSEMBLER, if we are - doing this relocation the code in write.c is going to call - bfd_perform_relocation, which is also going to use the symbol - value. That means that if the reloc is fully resolved we want to - use *valueP since bfd_perform_relocation is not being used. - However, if the reloc is not fully resolved we do not want to use - *valueP, and must use fx_offset instead. However, if the reloc - is PC relative, we do want to use *valueP since it includes the - result of md_pcrel_from. This is confusing. */ - if (fixP->fx_addsy == (symbolS *) NULL) fixP->fx_done = 1; else if (fixP->fx_pcrel) { - /* ELF relocations are against symbols. - If this symbol is in a different section then we need to leave it for - the linker to deal with. Unfortunately, md_pcrel_from can't tell, - so we have to undo it's effects here. */ - if (S_IS_DEFINED (fixP->fx_addsy) - && S_GET_SEGMENT (fixP->fx_addsy) != seg) + /* Hack around bfd_install_relocation brain damage. */ + if (S_GET_SEGMENT (fixP->fx_addsy) != seg) value += md_pcrel_from (fixP); } - else - { - value = fixP->fx_offset; - if (fixP->fx_subsy != (symbolS *) NULL) - { - if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) - value -= S_GET_VALUE (fixP->fx_subsy); - else - { - /* We can't actually support subtracting a symbol. */ - as_bad_where (fixP->fx_file, fixP->fx_line, - "expression too complex"); - } - } - } + + /* 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) { @@ -1957,10 +1313,8 @@ md_apply_fix3 (fixP, valP, seg) bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); if (fixP->fx_done) - { - /* Nothing else to do here. */ - return; - } + /* 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. @@ -2013,12 +1367,6 @@ md_apply_fix3 (fixP, valP, seg) md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, value, 4); break; -#if 0 - case BFD_RELOC_64: - md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, - value, 8); - break; -#endif 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 @@ -2032,23 +1380,21 @@ md_apply_fix3 (fixP, valP, seg) abort (); } } - - fixP->fx_addnumber = value; } /* Translate internal representation of relocation info to BFD target format. */ arelent * -tc_gen_reloc (section, fixP) - asection *section ATTRIBUTE_UNUSED; - fixS *fixP; +tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, + fixS *fixP) { arelent *reloc; - reloc = (arelent *) xmalloc (sizeof (arelent)); + reloc = xmalloc (sizeof (arelent)); + reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); - reloc->sym_ptr_ptr = &fixP->fx_addsy->bsym; + *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) @@ -2063,10 +1409,526 @@ tc_gen_reloc (section, fixP) assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); /* Set addend to account for PC being advanced one insn before the - target address is computed, drop fx_addnumber as it is handled - elsewhere mlm */ + 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_fix3. + + 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); +}