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Diffstat (limited to 'contrib/binutils/gas/read.c')
| -rw-r--r-- | contrib/binutils/gas/read.c | 4350 |
1 files changed, 4350 insertions, 0 deletions
diff --git a/contrib/binutils/gas/read.c b/contrib/binutils/gas/read.c new file mode 100644 index 0000000..85d221d --- /dev/null +++ b/contrib/binutils/gas/read.c @@ -0,0 +1,4350 @@ +/* read.c - read a source file - + Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 1997 + Free Software Foundation, Inc. + +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, 59 Temple Place - Suite 330, Boston, MA +02111-1307, USA. */ + +#if 0 +#define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will + change this a bit. But then, GNU isn't + spozed to run on your machine anyway. + (RMS is so shortsighted sometimes.) + */ +#else +#define MASK_CHAR ((int)(unsigned char)-1) +#endif + + +/* This is the largest known floating point format (for now). It will + grow when we do 4361 style flonums. */ + +#define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) + +/* Routines that read assembler source text to build spagetti in memory. + Another group of these functions is in the expr.c module. */ + +/* for isdigit() */ +#include <ctype.h> + +#include "as.h" +#include "subsegs.h" +#include "sb.h" +#include "macro.h" +#include "obstack.h" +#include "listing.h" +#include "ecoff.h" + +#ifndef TC_START_LABEL +#define TC_START_LABEL(x,y) (x==':') +#endif + +/* The NOP_OPCODE is for the alignment fill value. + * fill it a nop instruction so that the disassembler does not choke + * on it + */ +#ifndef NOP_OPCODE +#define NOP_OPCODE 0x00 +#endif + +char *input_line_pointer; /*->next char of source file to parse. */ + +int generate_asm_lineno = 0; /* flag to generate line stab for .s file */ + +#if BITS_PER_CHAR != 8 +/* The following table is indexed by[(char)] and will break if + a char does not have exactly 256 states (hopefully 0:255!)! */ +die horribly; +#endif + +#ifndef LEX_AT +/* The m88k unfortunately uses @ as a label beginner. */ +#define LEX_AT 0 +#endif + +#ifndef LEX_BR +/* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ +#define LEX_BR 0 +#endif + +#ifndef LEX_PCT +/* The Delta 68k assembler permits % inside label names. */ +#define LEX_PCT 0 +#endif + +#ifndef LEX_QM +/* The PowerPC Windows NT assemblers permits ? inside label names. */ +#define LEX_QM 0 +#endif + +#ifndef LEX_DOLLAR +/* The a29k assembler does not permits labels to start with $. */ +#define LEX_DOLLAR 3 +#endif + +#ifndef LEX_TILDE +/* The Delta 68k assembler permits ~ at start of label names. */ +#define LEX_TILDE 0 +#endif + +/* used by is_... macros. our ctype[] */ +char lex_type[256] = +{ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ + 0, 0, 0, 0, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */ + LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ + 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +}; + + +/* + * In: a character. + * Out: 1 if this character ends a line. + */ +#define _ (0) +char is_end_of_line[256] = +{ +#ifdef CR_EOL + _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */ +#else + _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */ +#endif + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ +#ifdef TC_HPPA + _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */ +#else + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */ +#endif + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ +}; +#undef _ + +/* Functions private to this file. */ + +static char *buffer; /* 1st char of each buffer of lines is here. */ +static char *buffer_limit; /*->1 + last char in buffer. */ + +/* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the + tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */ +int target_big_endian = TARGET_BYTES_BIG_ENDIAN; + +static char *old_buffer; /* JF a hack */ +static char *old_input; +static char *old_limit; + +/* Variables for handling include file directory list. */ + +char **include_dirs; /* List of pointers to directories to + search for .include's */ +int include_dir_count; /* How many are in the list */ +int include_dir_maxlen = 1;/* Length of longest in list */ + +#ifndef WORKING_DOT_WORD +struct broken_word *broken_words; +int new_broken_words; +#endif + +/* The current offset into the absolute section. We don't try to + build frags in the absolute section, since no data can be stored + there. We just keep track of the current offset. */ +addressT abs_section_offset; + +/* If this line had an MRI style label, it is stored in this variable. + This is used by some of the MRI pseudo-ops. */ +symbolS *line_label; + +/* This global variable is used to support MRI common sections. We + translate such sections into a common symbol. This variable is + non-NULL when we are in an MRI common section. */ +symbolS *mri_common_symbol; + +/* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we + need to align to an even byte boundary unless the next pseudo-op is + dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment + may be needed. */ +static int mri_pending_align; + +static void cons_worker PARAMS ((int, int)); +static int scrub_from_string PARAMS ((char **)); +static void do_align PARAMS ((int, char *, int, int)); +static void s_align PARAMS ((int, int)); +static int hex_float PARAMS ((int, char *)); +static void do_org PARAMS ((segT, expressionS *, int)); +char *demand_copy_string PARAMS ((int *lenP)); +static segT get_segmented_expression PARAMS ((expressionS *expP)); +static segT get_known_segmented_expression PARAMS ((expressionS * expP)); +static void pobegin PARAMS ((void)); +static int get_line_sb PARAMS ((sb *)); + + +void +read_begin () +{ + const char *p; + + pobegin (); + obj_read_begin_hook (); + + /* Something close -- but not too close -- to a multiple of 1024. + The debugging malloc I'm using has 24 bytes of overhead. */ + obstack_begin (¬es, chunksize); + obstack_begin (&cond_obstack, chunksize); + + /* Use machine dependent syntax */ + for (p = line_separator_chars; *p; p++) + is_end_of_line[(unsigned char) *p] = 1; + /* Use more. FIXME-SOMEDAY. */ + + if (flag_mri) + lex_type['?'] = 3; +} + +/* set up pseudo-op tables */ + +static struct hash_control *po_hash; + +static const pseudo_typeS potable[] = +{ + {"abort", s_abort, 0}, + {"align", s_align_ptwo, 0}, + {"ascii", stringer, 0}, + {"asciz", stringer, 1}, + {"balign", s_align_bytes, 0}, + {"balignw", s_align_bytes, -2}, + {"balignl", s_align_bytes, -4}, +/* block */ + {"byte", cons, 1}, + {"comm", s_comm, 0}, + {"common", s_mri_common, 0}, + {"common.s", s_mri_common, 1}, + {"data", s_data, 0}, + {"dc", cons, 2}, + {"dc.b", cons, 1}, + {"dc.d", float_cons, 'd'}, + {"dc.l", cons, 4}, + {"dc.s", float_cons, 'f'}, + {"dc.w", cons, 2}, + {"dc.x", float_cons, 'x'}, + {"dcb", s_space, 2}, + {"dcb.b", s_space, 1}, + {"dcb.d", s_float_space, 'd'}, + {"dcb.l", s_space, 4}, + {"dcb.s", s_float_space, 'f'}, + {"dcb.w", s_space, 2}, + {"dcb.x", s_float_space, 'x'}, + {"ds", s_space, 2}, + {"ds.b", s_space, 1}, + {"ds.d", s_space, 8}, + {"ds.l", s_space, 4}, + {"ds.p", s_space, 12}, + {"ds.s", s_space, 4}, + {"ds.w", s_space, 2}, + {"ds.x", s_space, 12}, + {"debug", s_ignore, 0}, +#ifdef S_SET_DESC + {"desc", s_desc, 0}, +#endif +/* dim */ + {"double", float_cons, 'd'}, +/* dsect */ + {"eject", listing_eject, 0}, /* Formfeed listing */ + {"else", s_else, 0}, + {"elsec", s_else, 0}, + {"end", s_end, 0}, + {"endc", s_endif, 0}, + {"endif", s_endif, 0}, +/* endef */ + {"equ", s_set, 0}, + {"equiv", s_set, 1}, + {"err", s_err, 0}, + {"exitm", s_mexit, 0}, +/* extend */ + {"extern", s_ignore, 0}, /* We treat all undef as ext */ + {"appfile", s_app_file, 1}, + {"appline", s_app_line, 0}, + {"fail", s_fail, 0}, + {"file", s_app_file, 0}, + {"fill", s_fill, 0}, + {"float", float_cons, 'f'}, + {"format", s_ignore, 0}, + {"global", s_globl, 0}, + {"globl", s_globl, 0}, + {"hword", cons, 2}, + {"if", s_if, (int) O_ne}, + {"ifc", s_ifc, 0}, + {"ifdef", s_ifdef, 0}, + {"ifeq", s_if, (int) O_eq}, + {"ifeqs", s_ifeqs, 0}, + {"ifge", s_if, (int) O_ge}, + {"ifgt", s_if, (int) O_gt}, + {"ifle", s_if, (int) O_le}, + {"iflt", s_if, (int) O_lt}, + {"ifnc", s_ifc, 1}, + {"ifndef", s_ifdef, 1}, + {"ifne", s_if, (int) O_ne}, + {"ifnes", s_ifeqs, 1}, + {"ifnotdef", s_ifdef, 1}, + {"include", s_include, 0}, + {"int", cons, 4}, + {"irp", s_irp, 0}, + {"irep", s_irp, 0}, + {"irpc", s_irp, 1}, + {"irepc", s_irp, 1}, + {"lcomm", s_lcomm, 0}, + {"lflags", listing_flags, 0}, /* Listing flags */ + {"linkonce", s_linkonce, 0}, + {"list", listing_list, 1}, /* Turn listing on */ + {"llen", listing_psize, 1}, + {"long", cons, 4}, + {"lsym", s_lsym, 0}, + {"macro", s_macro, 0}, + {"mexit", s_mexit, 0}, + {"mri", s_mri, 0}, + {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */ + {"name", s_ignore, 0}, + {"noformat", s_ignore, 0}, + {"nolist", listing_list, 0}, /* Turn listing off */ + {"nopage", listing_nopage, 0}, + {"octa", cons, 16}, + {"offset", s_struct, 0}, + {"org", s_org, 0}, + {"p2align", s_align_ptwo, 0}, + {"p2alignw", s_align_ptwo, -2}, + {"p2alignl", s_align_ptwo, -4}, + {"page", listing_eject, 0}, + {"plen", listing_psize, 0}, + {"print", s_print, 0}, + {"psize", listing_psize, 0}, /* set paper size */ + {"purgem", s_purgem, 0}, + {"quad", cons, 8}, + {"rep", s_rept, 0}, + {"rept", s_rept, 0}, + {"rva", s_rva, 4}, + {"sbttl", listing_title, 1}, /* Subtitle of listing */ +/* scl */ +/* sect */ + {"set", s_set, 0}, + {"short", cons, 2}, + {"single", float_cons, 'f'}, +/* size */ + {"space", s_space, 0}, + {"skip", s_space, 0}, + {"spc", s_ignore, 0}, + {"stabd", s_stab, 'd'}, + {"stabn", s_stab, 'n'}, + {"stabs", s_stab, 's'}, + {"string", stringer, 1}, + {"struct", s_struct, 0}, +/* tag */ + {"text", s_text, 0}, + + /* This is for gcc to use. It's only just been added (2/94), so gcc + won't be able to use it for a while -- probably a year or more. + But once this has been released, check with gcc maintainers + before deleting it or even changing the spelling. */ + {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, + /* If we're folding case -- done for some targets, not necessarily + all -- the above string in an input file will be converted to + this one. Match it either way... */ + {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, + + {"title", listing_title, 0}, /* Listing title */ + {"ttl", listing_title, 0}, +/* type */ +/* use */ +/* val */ + {"xcom", s_comm, 0}, + {"xdef", s_globl, 0}, + {"xref", s_ignore, 0}, + {"xstabs", s_xstab, 's'}, + {"word", cons, 2}, + {"zero", s_space, 0}, + {NULL} /* end sentinel */ +}; + +static int pop_override_ok = 0; +static const char *pop_table_name; + +void +pop_insert (table) + const pseudo_typeS *table; +{ + const char *errtxt; + const pseudo_typeS *pop; + for (pop = table; pop->poc_name; pop++) + { + errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); + if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) + as_fatal ("error constructing %s pseudo-op table: %s", pop_table_name, + errtxt); + } +} + +#ifndef md_pop_insert +#define md_pop_insert() pop_insert(md_pseudo_table) +#endif + +#ifndef obj_pop_insert +#define obj_pop_insert() pop_insert(obj_pseudo_table) +#endif + +static void +pobegin () +{ + po_hash = hash_new (); + + /* Do the target-specific pseudo ops. */ + pop_table_name = "md"; + md_pop_insert (); + + /* Now object specific. Skip any that were in the target table. */ + pop_table_name = "obj"; + pop_override_ok = 1; + obj_pop_insert (); + + /* Now portable ones. Skip any that we've seen already. */ + pop_table_name = "standard"; + pop_insert (potable); +} + +#define HANDLE_CONDITIONAL_ASSEMBLY() \ + if (ignore_input ()) \ + { \ + while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ + if (input_line_pointer == buffer_limit) \ + break; \ + continue; \ + } + + +/* This function is used when scrubbing the characters between #APP + and #NO_APP. */ + +static char *scrub_string; +static char *scrub_string_end; + +static int +scrub_from_string (from) + char **from; +{ + int size; + + *from = scrub_string; + size = scrub_string_end - scrub_string; + scrub_string = scrub_string_end; + return size; +} + +/* read_a_source_file() + * + * We read the file, putting things into a web that + * represents what we have been reading. + */ +void +read_a_source_file (name) + char *name; +{ + register char c; + register char *s; /* string of symbol, '\0' appended */ + register int temp; + pseudo_typeS *pop; + + buffer = input_scrub_new_file (name); + + listing_file (name); + listing_newline (""); + + while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) + { /* We have another line to parse. */ + know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ + contin: /* JF this goto is my fault I admit it. + Someone brave please re-write the whole + input section here? Pleeze??? */ + while (input_line_pointer < buffer_limit) + { + /* We have more of this buffer to parse. */ + + /* + * We now have input_line_pointer->1st char of next line. + * If input_line_pointer [-1] == '\n' then we just + * scanned another line: so bump line counters. + */ + if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) + { +#ifdef md_start_line_hook + md_start_line_hook (); +#endif + + if (input_line_pointer[-1] == '\n') + bump_line_counters (); + + line_label = NULL; + + if (flag_m68k_mri +#ifdef LABELS_WITHOUT_COLONS + || 1 +#endif + ) + { + /* Text at the start of a line must be a label, we + run down and stick a colon in. */ + if (is_name_beginner (*input_line_pointer)) + { + char *line_start = input_line_pointer; + char c; + int mri_line_macro; + + LISTING_NEWLINE (); + HANDLE_CONDITIONAL_ASSEMBLY (); + + c = get_symbol_end (); + + /* In MRI mode, the EQU and MACRO pseudoops must + be handled specially. */ + mri_line_macro = 0; + if (flag_m68k_mri) + { + char *rest = input_line_pointer + 1; + + if (*rest == ':') + ++rest; + if (*rest == ' ' || *rest == '\t') + ++rest; + if ((strncasecmp (rest, "EQU", 3) == 0 + || strncasecmp (rest, "SET", 3) == 0) + && (rest[3] == ' ' || rest[3] == '\t')) + { + input_line_pointer = rest + 3; + equals (line_start, + strncasecmp (rest, "SET", 3) == 0); + continue; + } + if (strncasecmp (rest, "MACRO", 5) == 0 + && (rest[5] == ' ' + || rest[5] == '\t' + || is_end_of_line[(unsigned char) rest[5]])) + mri_line_macro = 1; + } + + /* In MRI mode, we need to handle the MACRO + pseudo-op specially: we don't want to put the + symbol in the symbol table. */ + if (! mri_line_macro) + line_label = colon (line_start); + else + line_label = symbol_create (line_start, + absolute_section, + (valueT) 0, + &zero_address_frag); + + *input_line_pointer = c; + if (c == ':') + input_line_pointer++; + } + } + } + + /* + * We are at the begining of a line, or similar place. + * We expect a well-formed assembler statement. + * A "symbol-name:" is a statement. + * + * Depending on what compiler is used, the order of these tests + * may vary to catch most common case 1st. + * Each test is independent of all other tests at the (top) level. + * PLEASE make a compiler that doesn't use this assembler. + * It is crufty to waste a compiler's time encoding things for this + * assembler, which then wastes more time decoding it. + * (And communicating via (linear) files is silly! + * If you must pass stuff, please pass a tree!) + */ + if ((c = *input_line_pointer++) == '\t' + || c == ' ' + || c == '\f' + || c == 0) + { + c = *input_line_pointer++; + } + know (c != ' '); /* No further leading whitespace. */ + LISTING_NEWLINE (); + /* + * C is the 1st significant character. + * Input_line_pointer points after that character. + */ + if (is_name_beginner (c)) + { + /* want user-defined label or pseudo/opcode */ + HANDLE_CONDITIONAL_ASSEMBLY (); + + s = --input_line_pointer; + c = get_symbol_end (); /* name's delimiter */ + /* + * C is character after symbol. + * That character's place in the input line is now '\0'. + * S points to the beginning of the symbol. + * [In case of pseudo-op, s->'.'.] + * Input_line_pointer->'\0' where c was. + */ + if (TC_START_LABEL(c, input_line_pointer)) + { + if (flag_m68k_mri) + { + char *rest = input_line_pointer + 1; + + /* In MRI mode, \tsym: set 0 is permitted. */ + + if (*rest == ':') + ++rest; + if (*rest == ' ' || *rest == '\t') + ++rest; + if ((strncasecmp (rest, "EQU", 3) == 0 + || strncasecmp (rest, "SET", 3) == 0) + && (rest[3] == ' ' || rest[3] == '\t')) + { + input_line_pointer = rest + 3; + equals (s, 1); + continue; + } + } + + line_label = colon (s); /* user-defined label */ + *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ + /* Input_line_pointer->after ':'. */ + SKIP_WHITESPACE (); + + + } + else if (c == '=' + || ((c == ' ' || c == '\t') + && input_line_pointer[1] == '=' +#ifdef TC_EQUAL_IN_INSN + && ! TC_EQUAL_IN_INSN (c, input_line_pointer) +#endif + )) + { + equals (s, 1); + demand_empty_rest_of_line (); + } + else + { /* expect pseudo-op or machine instruction */ + pop = NULL; + +#define IGNORE_OPCODE_CASE +#ifdef IGNORE_OPCODE_CASE + { + char *s2 = s; + while (*s2) + { + if (isupper (*s2)) + *s2 = tolower (*s2); + s2++; + } + } +#endif + + if (flag_m68k_mri +#ifdef NO_PSEUDO_DOT + || 1 +#endif + ) + { + /* The MRI assembler and the m88k use pseudo-ops + without a period. */ + pop = (pseudo_typeS *) hash_find (po_hash, s); + if (pop != NULL && pop->poc_handler == NULL) + pop = NULL; + } + + if (pop != NULL + || (! flag_m68k_mri && *s == '.')) + { + /* + * PSEUDO - OP. + * + * WARNING: c has next char, which may be end-of-line. + * We lookup the pseudo-op table with s+1 because we + * already know that the pseudo-op begins with a '.'. + */ + + if (pop == NULL) + pop = (pseudo_typeS *) hash_find (po_hash, s + 1); + + /* In MRI mode, we may need to insert an + automatic alignment directive. What a hack + this is. */ + if (mri_pending_align + && (pop == NULL + || ! ((pop->poc_handler == cons + && pop->poc_val == 1) + || (pop->poc_handler == s_space + && pop->poc_val == 1) +#ifdef tc_conditional_pseudoop + || tc_conditional_pseudoop (pop) +#endif + || pop->poc_handler == s_if + || pop->poc_handler == s_ifdef + || pop->poc_handler == s_ifc + || pop->poc_handler == s_ifeqs + || pop->poc_handler == s_else + || pop->poc_handler == s_endif + || pop->poc_handler == s_globl + || pop->poc_handler == s_ignore))) + { + do_align (1, (char *) NULL, 0, 0); + mri_pending_align = 0; + if (line_label != NULL) + { + line_label->sy_frag = frag_now; + S_SET_VALUE (line_label, frag_now_fix ()); + } + } + + /* Print the error msg now, while we still can */ + if (pop == NULL) + { + as_bad ("Unknown pseudo-op: `%s'", s); + *input_line_pointer = c; + s_ignore (0); + continue; + } + + /* Put it back for error messages etc. */ + *input_line_pointer = c; + /* The following skip of whitespace is compulsory. + A well shaped space is sometimes all that separates + keyword from operands. */ + if (c == ' ' || c == '\t') + input_line_pointer++; + /* + * Input_line is restored. + * Input_line_pointer->1st non-blank char + * after pseudo-operation. + */ + (*pop->poc_handler) (pop->poc_val); + + /* If that was .end, just get out now. */ + if (pop->poc_handler == s_end) + goto quit; + } + else + { + int inquote = 0; + + /* WARNING: c has char, which may be end-of-line. */ + /* Also: input_line_pointer->`\0` where c was. */ + *input_line_pointer = c; + while (!is_end_of_line[(unsigned char) *input_line_pointer] + || inquote +#ifdef TC_EOL_IN_INSN + || TC_EOL_IN_INSN (input_line_pointer) +#endif + ) + { + if (flag_m68k_mri && *input_line_pointer == '\'') + inquote = ! inquote; + input_line_pointer++; + } + + c = *input_line_pointer; + *input_line_pointer = '\0'; + +#ifdef OBJ_GENERATE_ASM_LINENO + if (generate_asm_lineno == 0) + { + if (ecoff_no_current_file ()) + generate_asm_lineno = 1; + } + if (generate_asm_lineno == 1) + { + unsigned int lineno; + char *s; + + as_where (&s, &lineno); + OBJ_GENERATE_ASM_LINENO (s, lineno); + } +#endif + + if (macro_defined) + { + sb out; + const char *err; + + if (check_macro (s, &out, '\0', &err)) + { + if (err != NULL) + as_bad (err); + *input_line_pointer++ = c; + input_scrub_include_sb (&out, + input_line_pointer); + sb_kill (&out); + buffer_limit = + input_scrub_next_buffer (&input_line_pointer); + continue; + } + } + + if (mri_pending_align) + { + do_align (1, (char *) NULL, 0, 0); + mri_pending_align = 0; + if (line_label != NULL) + { + line_label->sy_frag = frag_now; + S_SET_VALUE (line_label, frag_now_fix ()); + } + } + + md_assemble (s); /* Assemble 1 instruction. */ + + *input_line_pointer++ = c; + + /* We resume loop AFTER the end-of-line from + this instruction. */ + } /* if (*s=='.') */ + } /* if c==':' */ + continue; + } /* if (is_name_beginner(c) */ + + + /* Empty statement? */ + if (is_end_of_line[(unsigned char) c]) + continue; + + if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) + && isdigit (c)) + { + /* local label ("4:") */ + char *backup = input_line_pointer; + + HANDLE_CONDITIONAL_ASSEMBLY (); + + temp = c - '0'; + + while (isdigit (*input_line_pointer)) + { + temp = (temp * 10) + *input_line_pointer - '0'; + ++input_line_pointer; + } /* read the whole number */ + + if (LOCAL_LABELS_DOLLAR + && *input_line_pointer == '$' + && *(input_line_pointer + 1) == ':') + { + input_line_pointer += 2; + + if (dollar_label_defined (temp)) + { + as_fatal ("label \"%d$\" redefined", temp); + } + + define_dollar_label (temp); + colon (dollar_label_name (temp, 0)); + continue; + } + + if (LOCAL_LABELS_FB + && *input_line_pointer++ == ':') + { + fb_label_instance_inc (temp); + colon (fb_label_name (temp, 0)); + continue; + } + + input_line_pointer = backup; + } /* local label ("4:") */ + + if (c && strchr (line_comment_chars, c)) + { /* Its a comment. Better say APP or NO_APP */ + char *ends; + char *new_buf; + char *new_tmp; + unsigned int new_length; + char *tmp_buf = 0; + + bump_line_counters (); + s = input_line_pointer; + if (strncmp (s, "APP\n", 4)) + continue; /* We ignore it */ + s += 4; + + ends = strstr (s, "#NO_APP\n"); + + if (!ends) + { + unsigned int tmp_len; + unsigned int num; + + /* The end of the #APP wasn't in this buffer. We + keep reading in buffers until we find the #NO_APP + that goes with this #APP There is one. The specs + guarentee it. . . */ + tmp_len = buffer_limit - s; + tmp_buf = xmalloc (tmp_len + 1); + memcpy (tmp_buf, s, tmp_len); + do + { + new_tmp = input_scrub_next_buffer (&buffer); + if (!new_tmp) + break; + else + buffer_limit = new_tmp; + input_line_pointer = buffer; + ends = strstr (buffer, "#NO_APP\n"); + if (ends) + num = ends - buffer; + else + num = buffer_limit - buffer; + + tmp_buf = xrealloc (tmp_buf, tmp_len + num); + memcpy (tmp_buf + tmp_len, buffer, num); + tmp_len += num; + } + while (!ends); + + input_line_pointer = ends ? ends + 8 : NULL; + + s = tmp_buf; + ends = s + tmp_len; + + } + else + { + input_line_pointer = ends + 8; + } + + scrub_string = s; + scrub_string_end = ends; + + new_length = ends - s; + new_buf = (char *) xmalloc (new_length); + new_tmp = new_buf; + for (;;) + { + int space; + int size; + + space = (new_buf + new_length) - new_tmp; + size = do_scrub_chars (scrub_from_string, new_tmp, space); + + if (size < space) + { + new_tmp += size; + break; + } + + new_buf = xrealloc (new_buf, new_length + 100); + new_tmp = new_buf + new_length; + new_length += 100; + } + + if (tmp_buf) + free (tmp_buf); + old_buffer = buffer; + old_input = input_line_pointer; + old_limit = buffer_limit; + buffer = new_buf; + input_line_pointer = new_buf; + buffer_limit = new_tmp; + continue; + } + + HANDLE_CONDITIONAL_ASSEMBLY (); + +#ifdef tc_unrecognized_line + if (tc_unrecognized_line (c)) + continue; +#endif + + /* as_warn("Junk character %d.",c); Now done by ignore_rest */ + input_line_pointer--; /* Report unknown char as ignored. */ + ignore_rest_of_line (); + } /* while (input_line_pointer<buffer_limit) */ + +#ifdef md_after_pass_hook + md_after_pass_hook (); +#endif + + if (old_buffer) + { + free (buffer); + bump_line_counters (); + if (old_input != 0) + { + buffer = old_buffer; + input_line_pointer = old_input; + buffer_limit = old_limit; + old_buffer = 0; + goto contin; + } + } + } /* while (more buffers to scan) */ + + quit: + +#ifdef md_cleanup + md_cleanup(); +#endif + input_scrub_close (); /* Close the input file */ +} + +/* For most MRI pseudo-ops, the line actually ends at the first + nonquoted space. This function looks for that point, stuffs a null + in, and sets *STOPCP to the character that used to be there, and + returns the location. + + Until I hear otherwise, I am going to assume that this is only true + for the m68k MRI assembler. */ + +char * +mri_comment_field (stopcp) + char *stopcp; +{ +#ifdef TC_M68K + + char *s; + int inquote = 0; + + know (flag_m68k_mri); + + for (s = input_line_pointer; + ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t') + || inquote); + s++) + { + if (*s == '\'') + inquote = ! inquote; + } + *stopcp = *s; + *s = '\0'; + return s; + +#else + + char *s; + + for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++) + ; + *stopcp = *s; + *s = '\0'; + return s; + +#endif + +} + +/* Skip to the end of an MRI comment field. */ + +void +mri_comment_end (stop, stopc) + char *stop; + int stopc; +{ + know (flag_mri); + + input_line_pointer = stop; + *stop = stopc; + while (! is_end_of_line[(unsigned char) *input_line_pointer]) + ++input_line_pointer; +} + +void +s_abort (ignore) + int ignore; +{ + as_fatal (".abort detected. Abandoning ship."); +} + +/* Guts of .align directive. N is the power of two to which to align. + FILL may be NULL, or it may point to the bytes of the fill pattern. + LEN is the length of whatever FILL points to, if anything. MAX is + the maximum number of characters to skip when doing the alignment, + or 0 if there is no maximum. */ + +static void +do_align (n, fill, len, max) + int n; + char *fill; + int len; + int max; +{ + char default_fill; + +#ifdef md_do_align + md_do_align (n, fill, len, max, just_record_alignment); +#endif + + if (fill == NULL) + { + /* FIXME: Fix this right for BFD! */ + if (now_seg != data_section && now_seg != bss_section) + default_fill = NOP_OPCODE; + else + default_fill = 0; + fill = &default_fill; + len = 1; + } + + /* Only make a frag if we HAVE to. . . */ + if (n != 0 && !need_pass_2) + { + if (len <= 1) + frag_align (n, *fill, max); + else + frag_align_pattern (n, fill, len, max); + } + +#ifdef md_do_align + just_record_alignment: +#endif + + record_alignment (now_seg, n); +} + +/* Handle the .align pseudo-op. A positive ARG is a default alignment + (in bytes). A negative ARG is the negative of the length of the + fill pattern. BYTES_P is non-zero if the alignment value should be + interpreted as the byte boundary, rather than the power of 2. */ + +static void +s_align (arg, bytes_p) + int arg; + int bytes_p; +{ + register unsigned int align; + char *stop = NULL; + char stopc; + offsetT fill = 0; + int max; + int fill_p; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + if (is_end_of_line[(unsigned char) *input_line_pointer]) + { + if (arg < 0) + align = 0; + else + align = arg; /* Default value from pseudo-op table */ + } + else + { + align = get_absolute_expression (); + SKIP_WHITESPACE (); + } + + if (bytes_p) + { + /* Convert to a power of 2. */ + if (align != 0) + { + unsigned int i; + + for (i = 0; (align & 1) == 0; align >>= 1, ++i) + ; + if (align != 1) + as_bad ("Alignment not a power of 2"); + align = i; + } + } + + if (align > 15) + { + align = 15; + as_bad ("Alignment too large: %u assumed", align); + } + + if (*input_line_pointer != ',') + { + fill_p = 0; + max = 0; + } + else + { + ++input_line_pointer; + if (*input_line_pointer == ',') + fill_p = 0; + else + { + fill = get_absolute_expression (); + SKIP_WHITESPACE (); + fill_p = 1; + } + + if (*input_line_pointer != ',') + max = 0; + else + { + ++input_line_pointer; + max = get_absolute_expression (); + } + } + + if (! fill_p) + { + if (arg < 0) + as_warn ("expected fill pattern missing"); + do_align (align, (char *) NULL, 0, max); + } + else + { + int fill_len; + + if (arg >= 0) + fill_len = 1; + else + fill_len = - arg; + if (fill_len <= 1) + { + char fill_char; + + fill_char = fill; + do_align (align, &fill_char, fill_len, max); + } + else + { + char ab[16]; + + if (fill_len > sizeof ab) + abort (); + md_number_to_chars (ab, fill, fill_len); + do_align (align, ab, fill_len, max); + } + } + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +/* Handle the .align pseudo-op on machines where ".align 4" means + align to a 4 byte boundary. */ + +void +s_align_bytes (arg) + int arg; +{ + s_align (arg, 1); +} + +/* Handle the .align pseud-op on machines where ".align 4" means align + to a 2**4 boundary. */ + +void +s_align_ptwo (arg) + int arg; +{ + s_align (arg, 0); +} + +void +s_comm (ignore) + int ignore; +{ + register char *name; + register char c; + register char *p; + offsetT temp; + register symbolS *symbolP; + char *stop = NULL; + char stopc; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + 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: rest of line ignored."); + if (flag_mri) + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + input_line_pointer++; /* skip ',' */ + if ((temp = get_absolute_expression ()) < 0) + { + as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp); + if (flag_mri) + mri_comment_end (stop, stopc); + 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 `%s'.", + S_GET_NAME (symbolP)); + if (flag_mri) + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + if (S_GET_VALUE (symbolP)) + { + if (S_GET_VALUE (symbolP) != (valueT) temp) + as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.", + S_GET_NAME (symbolP), + (long) S_GET_VALUE (symbolP), + (long) temp); + } + else + { + S_SET_VALUE (symbolP, (valueT) temp); + S_SET_EXTERNAL (symbolP); + } +#ifdef OBJ_VMS + { + extern int flag_one; + if ( (!temp) || !flag_one) + S_GET_OTHER(symbolP) = const_flag; + } +#endif /* not OBJ_VMS */ + know (symbolP->sy_frag == &zero_address_frag); + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} /* s_comm() */ + +/* The MRI COMMON pseudo-op. We handle this by creating a common + symbol with the appropriate name. We make s_space do the right + thing by increasing the size. */ + +void +s_mri_common (small) + int small; +{ + char *name; + char c; + char *alc = NULL; + symbolS *sym; + offsetT align; + char *stop = NULL; + char stopc; + + if (! flag_mri) + { + s_comm (0); + return; + } + + stop = mri_comment_field (&stopc); + + SKIP_WHITESPACE (); + + name = input_line_pointer; + if (! isdigit ((unsigned char) *name)) + c = get_symbol_end (); + else + { + do + { + ++input_line_pointer; + } + while (isdigit ((unsigned char) *input_line_pointer)); + c = *input_line_pointer; + *input_line_pointer = '\0'; + + if (line_label != NULL) + { + alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) + + (input_line_pointer - name) + + 1); + sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); + name = alc; + } + } + + sym = symbol_find_or_make (name); + *input_line_pointer = c; + if (alc != NULL) + free (alc); + + if (*input_line_pointer != ',') + align = 0; + else + { + ++input_line_pointer; + align = get_absolute_expression (); + } + + if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym)) + { + as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym)); + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + + S_SET_EXTERNAL (sym); + mri_common_symbol = sym; + +#ifdef S_SET_ALIGN + if (align != 0) + S_SET_ALIGN (sym, align); +#endif + + if (line_label != NULL) + { + line_label->sy_value.X_op = O_symbol; + line_label->sy_value.X_add_symbol = sym; + line_label->sy_value.X_add_number = S_GET_VALUE (sym); + line_label->sy_frag = &zero_address_frag; + S_SET_SEGMENT (line_label, expr_section); + } + + /* FIXME: We just ignore the small argument, which distinguishes + COMMON and COMMON.S. I don't know what we can do about it. */ + + /* Ignore the type and hptype. */ + if (*input_line_pointer == ',') + input_line_pointer += 2; + if (*input_line_pointer == ',') + input_line_pointer += 2; + + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +void +s_data (ignore) + int ignore; +{ + segT section; + register int temp; + + temp = get_absolute_expression (); + if (flag_readonly_data_in_text) + { + section = text_section; + temp += 1000; + } + else + section = data_section; + + subseg_set (section, (subsegT) temp); + +#ifdef OBJ_VMS + const_flag = 0; +#endif + demand_empty_rest_of_line (); +} + +/* Handle the .appfile pseudo-op. This is automatically generated by + do_scrub_chars when a preprocessor # line comment is seen with a + file name. This default definition may be overridden by the object + or CPU specific pseudo-ops. This function is also the default + definition for .file; the APPFILE argument is 1 for .appfile, 0 for + .file. */ + +void +s_app_file (appfile) + int appfile; +{ + register char *s; + int length; + + /* Some assemblers tolerate immediately following '"' */ + if ((s = demand_copy_string (&length)) != 0) + { + /* If this is a fake .appfile, a fake newline was inserted into + the buffer. Passing -2 to new_logical_line tells it to + account for it. */ + new_logical_line (s, appfile ? -2 : -1); + + /* In MRI mode, the preprocessor may have inserted an extraneous + backquote. */ + if (flag_m68k_mri + && *input_line_pointer == '\'' + && is_end_of_line[(unsigned char) input_line_pointer[1]]) + ++input_line_pointer; + + demand_empty_rest_of_line (); +#ifdef LISTING + if (listing) + listing_source_file (s); +#endif + } +#ifdef obj_app_file + obj_app_file (s); +#endif +} + +/* Handle the .appline pseudo-op. This is automatically generated by + do_scrub_chars when a preprocessor # line comment is seen. This + default definition may be overridden by the object or CPU specific + pseudo-ops. */ + +void +s_app_line (ignore) + int ignore; +{ + int l; + + /* The given number is that of the next line. */ + l = get_absolute_expression () - 1; + if (l < 0) + /* Some of the back ends can't deal with non-positive line numbers. + Besides, it's silly. */ + as_warn ("Line numbers must be positive; line number %d rejected.", l+1); + else + { + new_logical_line ((char *) NULL, l); +#ifdef LISTING + if (listing) + listing_source_line (l); +#endif + } + demand_empty_rest_of_line (); +} + +/* Handle the .end pseudo-op. Actually, the real work is done in + read_a_source_file. */ + +void +s_end (ignore) + int ignore; +{ + if (flag_mri) + { + /* The MRI assembler permits the start symbol to follow .end, + but we don't support that. */ + SKIP_WHITESPACE (); + if (! is_end_of_line[(unsigned char) *input_line_pointer] + && *input_line_pointer != '*' + && *input_line_pointer != '!') + as_warn ("start address not supported"); + } +} + +/* Handle the .err pseudo-op. */ + +void +s_err (ignore) + int ignore; +{ + as_bad (".err encountered"); + demand_empty_rest_of_line (); +} + +/* Handle the MRI fail pseudo-op. */ + +void +s_fail (ignore) + int ignore; +{ + offsetT temp; + char *stop = NULL; + char stopc; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + temp = get_absolute_expression (); + if (temp >= 500) + as_warn (".fail %ld encountered", (long) temp); + else + as_bad (".fail %ld encountered", (long) temp); + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +void +s_fill (ignore) + int ignore; +{ + long temp_repeat = 0; + long temp_size = 1; + register long temp_fill = 0; + char *p; + +#ifdef md_flush_pending_output + md_flush_pending_output (); +#endif + + temp_repeat = get_absolute_expression (); + if (*input_line_pointer == ',') + { + input_line_pointer++; + temp_size = get_absolute_expression (); + if (*input_line_pointer == ',') + { + input_line_pointer++; + temp_fill = get_absolute_expression (); + } + } + /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ +#define BSD_FILL_SIZE_CROCK_8 (8) + if (temp_size > BSD_FILL_SIZE_CROCK_8) + { + as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); + temp_size = BSD_FILL_SIZE_CROCK_8; + } + if (temp_size < 0) + { + as_warn ("Size negative: .fill ignored."); + temp_size = 0; + } + else if (temp_repeat <= 0) + { + if (temp_repeat < 0) + as_warn ("Repeat < 0, .fill ignored"); + temp_size = 0; + } + + if (temp_size && !need_pass_2) + { + p = frag_var (rs_fill, (int) temp_size, (int) temp_size, + (relax_substateT) 0, (symbolS *) 0, (offsetT) temp_repeat, + (char *) 0); + memset (p, 0, (unsigned int) temp_size); + /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX + * flavoured AS. The following bizzare behaviour is to be + * compatible with above. I guess they tried to take up to 8 + * bytes from a 4-byte expression and they forgot to sign + * extend. Un*x Sux. */ +#define BSD_FILL_SIZE_CROCK_4 (4) + md_number_to_chars (p, (valueT) temp_fill, + (temp_size > BSD_FILL_SIZE_CROCK_4 + ? BSD_FILL_SIZE_CROCK_4 + : (int) temp_size)); + /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) + * but emits no error message because it seems a legal thing to do. + * It is a degenerate case of .fill but could be emitted by a compiler. + */ + } + demand_empty_rest_of_line (); +} + +void +s_globl (ignore) + int ignore; +{ + char *name; + int c; + symbolS *symbolP; + char *stop = NULL; + char stopc; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + do + { + name = input_line_pointer; + c = get_symbol_end (); + symbolP = symbol_find_or_make (name); + *input_line_pointer = c; + SKIP_WHITESPACE (); + S_SET_EXTERNAL (symbolP); + if (c == ',') + { + input_line_pointer++; + SKIP_WHITESPACE (); + if (*input_line_pointer == '\n') + c = '\n'; + } + } + while (c == ','); + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +/* Handle the MRI IRP and IRPC pseudo-ops. */ + +void +s_irp (irpc) + int irpc; +{ + char *file; + unsigned int line; + sb s; + const char *err; + sb out; + + as_where (&file, &line); + + sb_new (&s); + while (! is_end_of_line[(unsigned char) *input_line_pointer]) + sb_add_char (&s, *input_line_pointer++); + + sb_new (&out); + + err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); + if (err != NULL) + as_bad_where (file, line, "%s", err); + + sb_kill (&s); + + input_scrub_include_sb (&out, input_line_pointer); + sb_kill (&out); + buffer_limit = input_scrub_next_buffer (&input_line_pointer); +} + +/* Handle the .linkonce pseudo-op. This tells the assembler to mark + the section to only be linked once. However, this is not supported + by most object file formats. This takes an optional argument, + which is what to do about duplicates. */ + +void +s_linkonce (ignore) + int ignore; +{ + enum linkonce_type type; + + SKIP_WHITESPACE (); + + type = LINKONCE_DISCARD; + + if (! is_end_of_line[(unsigned char) *input_line_pointer]) + { + char *s; + char c; + + s = input_line_pointer; + c = get_symbol_end (); + if (strcasecmp (s, "discard") == 0) + type = LINKONCE_DISCARD; + else if (strcasecmp (s, "one_only") == 0) + type = LINKONCE_ONE_ONLY; + else if (strcasecmp (s, "same_size") == 0) + type = LINKONCE_SAME_SIZE; + else if (strcasecmp (s, "same_contents") == 0) + type = LINKONCE_SAME_CONTENTS; + else + as_warn ("unrecognized .linkonce type `%s'", s); + + *input_line_pointer = c; + } + +#ifdef obj_handle_link_once + obj_handle_link_once (type); +#else /* ! defined (obj_handle_link_once) */ +#ifdef BFD_ASSEMBLER + { + flagword flags; + + if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0) + as_warn (".linkonce is not supported for this object file format"); + + flags = bfd_get_section_flags (stdoutput, now_seg); + flags |= SEC_LINK_ONCE; + switch (type) + { + default: + abort (); + case LINKONCE_DISCARD: + flags |= SEC_LINK_DUPLICATES_DISCARD; + break; + case LINKONCE_ONE_ONLY: + flags |= SEC_LINK_DUPLICATES_ONE_ONLY; + break; + case LINKONCE_SAME_SIZE: + flags |= SEC_LINK_DUPLICATES_SAME_SIZE; + break; + case LINKONCE_SAME_CONTENTS: + flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; + break; + } + if (! bfd_set_section_flags (stdoutput, now_seg, flags)) + as_bad ("bfd_set_section_flags: %s", + bfd_errmsg (bfd_get_error ())); + } +#else /* ! defined (BFD_ASSEMBLER) */ + as_warn (".linkonce is not supported for this object file format"); +#endif /* ! defined (BFD_ASSEMBLER) */ +#endif /* ! defined (obj_handle_link_once) */ + + demand_empty_rest_of_line (); +} + +void +s_lcomm (needs_align) + /* 1 if this was a ".bss" directive, which may require a 3rd argument + (alignment); 0 if it was an ".lcomm" (2 args only) */ + int needs_align; +{ + register char *name; + register char c; + register char *p; + register int temp; + register symbolS *symbolP; + segT current_seg = now_seg; + subsegT current_subseg = now_subseg; + const int max_alignment = 15; + int align = 0; + segT bss_seg = bss_section; + + name = input_line_pointer; + c = get_symbol_end (); + p = input_line_pointer; + *p = c; + SKIP_WHITESPACE (); + + /* Accept an optional comma after the name. The comma used to be + required, but Irix 5 cc does not generate it. */ + if (*input_line_pointer == ',') + { + ++input_line_pointer; + SKIP_WHITESPACE (); + } + + if (*input_line_pointer == '\n') + { + as_bad ("Missing size expression"); + return; + } + + if ((temp = get_absolute_expression ()) < 0) + { + as_warn ("BSS length (%d.) <0! Ignored.", temp); + ignore_rest_of_line (); + return; + } + +#if defined (TC_MIPS) || defined (TC_ALPHA) + if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour + || OUTPUT_FLAVOR == bfd_target_elf_flavour) + { + /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ + if (temp <= bfd_get_gp_size (stdoutput)) + { + bss_seg = subseg_new (".sbss", 1); + seg_info (bss_seg)->bss = 1; +#ifdef BFD_ASSEMBLER + if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC)) + as_warn ("error setting flags for \".sbss\": %s", + bfd_errmsg (bfd_get_error ())); +#endif + } + } +#endif + if (!needs_align) + { + /* FIXME. This needs to be machine independent. */ + if (temp >= 8) + align = 3; + else if (temp >= 4) + align = 2; + else if (temp >= 2) + align = 1; + else + align = 0; + +#ifdef OBJ_EVAX + /* FIXME: This needs to be done in a more general fashion. */ + align = 3; +#endif + + record_alignment(bss_seg, align); + } + + if (needs_align) + { + align = 0; + SKIP_WHITESPACE (); + if (*input_line_pointer != ',') + { + as_bad ("Expected comma after size"); + ignore_rest_of_line (); + return; + } + input_line_pointer++; + SKIP_WHITESPACE (); + if (*input_line_pointer == '\n') + { + as_bad ("Missing alignment"); + return; + } + align = get_absolute_expression (); + if (align > max_alignment) + { + align = max_alignment; + as_warn ("Alignment too large: %d. assumed.", align); + } + else if (align < 0) + { + align = 0; + as_warn ("Alignment negative. 0 assumed."); + } + record_alignment (bss_seg, align); + } /* if needs align */ + else + { + /* Assume some objects may require alignment on some systems. */ +#if defined (TC_ALPHA) && ! defined (VMS) + if (temp > 1) + { + align = ffs (temp) - 1; + if (temp % (1 << align)) + abort (); + } +#endif + } + + *p = 0; + symbolP = symbol_find_or_make (name); + *p = c; + + if ( +#if defined(OBJ_AOUT) | defined(OBJ_BOUT) + S_GET_OTHER (symbolP) == 0 && + S_GET_DESC (symbolP) == 0 && +#endif /* OBJ_AOUT or OBJ_BOUT */ + (S_GET_SEGMENT (symbolP) == bss_seg + || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) + { + char *pfrag; + + subseg_set (bss_seg, 1); + + if (align) + frag_align (align, 0, 0); + /* detach from old frag */ + if (S_GET_SEGMENT (symbolP) == bss_seg) + symbolP->sy_frag->fr_symbol = NULL; + + symbolP->sy_frag = frag_now; + pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, + (offsetT) temp, (char *) 0); + *pfrag = 0; + + S_SET_SEGMENT (symbolP, bss_seg); + +#ifdef OBJ_COFF + /* The symbol may already have been created with a preceding + ".globl" directive -- be careful not to step on storage class + in that case. Otherwise, set it to static. */ + if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) + { + S_SET_STORAGE_CLASS (symbolP, C_STAT); + } +#endif /* OBJ_COFF */ + +#ifdef S_SET_SIZE + S_SET_SIZE (symbolP, temp); +#endif + } + else + as_bad ("Ignoring attempt to re-define symbol `%s'.", + S_GET_NAME (symbolP)); + + subseg_set (current_seg, current_subseg); + + demand_empty_rest_of_line (); +} /* s_lcomm() */ + +void +s_lsym (ignore) + int ignore; +{ + register char *name; + register char c; + register char *p; + expressionS exp; + register symbolS *symbolP; + + /* we permit ANY defined expression: BSD4.2 demands constants */ + name = input_line_pointer; + c = get_symbol_end (); + p = input_line_pointer; + *p = c; + SKIP_WHITESPACE (); + if (*input_line_pointer != ',') + { + *p = 0; + as_bad ("Expected comma after name \"%s\"", name); + *p = c; + ignore_rest_of_line (); + return; + } + input_line_pointer++; + expression (&exp); + if (exp.X_op != O_constant + && exp.X_op != O_register) + { + as_bad ("bad expression"); + ignore_rest_of_line (); + return; + } + *p = 0; + symbolP = symbol_find_or_make (name); + + /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && + symbolP->sy_desc == 0) out of this test because coff doesn't have + those fields, and I can't see when they'd ever be tripped. I + don't think I understand why they were here so I may have + introduced a bug. As recently as 1.37 didn't have this test + anyway. xoxorich. */ + + if (S_GET_SEGMENT (symbolP) == undefined_section + && S_GET_VALUE (symbolP) == 0) + { + /* The name might be an undefined .global symbol; be sure to + keep the "external" bit. */ + S_SET_SEGMENT (symbolP, + (exp.X_op == O_constant + ? absolute_section + : reg_section)); + S_SET_VALUE (symbolP, (valueT) exp.X_add_number); + } + else + { + as_bad ("Symbol %s already defined", name); + } + *p = c; + demand_empty_rest_of_line (); +} /* s_lsym() */ + +/* Read a line into an sb. */ + +static int +get_line_sb (line) + sb *line; +{ + char quote1, quote2, inquote; + + if (input_line_pointer[-1] == '\n') + bump_line_counters (); + + if (input_line_pointer >= buffer_limit) + { + buffer_limit = input_scrub_next_buffer (&input_line_pointer); + if (buffer_limit == 0) + return 0; + } + + /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this + code needs to be changed. */ + if (! flag_m68k_mri) + quote1 = '"'; + else + quote1 = '\0'; + + quote2 = '\0'; + if (flag_m68k_mri) + quote2 = '\''; +#ifdef LEX_IS_STRINGQUOTE + quote2 = '\''; +#endif + + inquote = '\0'; + while (! is_end_of_line[(unsigned char) *input_line_pointer] + || (inquote != '\0' && *input_line_pointer != '\n')) + { + if (inquote == *input_line_pointer) + inquote = '\0'; + else if (inquote == '\0') + { + if (*input_line_pointer == quote1) + inquote = quote1; + else if (*input_line_pointer == quote2) + inquote = quote2; + } + sb_add_char (line, *input_line_pointer++); + } + while (input_line_pointer < buffer_limit && *input_line_pointer == '\n') + { + if (input_line_pointer[-1] == '\n') + bump_line_counters (); + ++input_line_pointer; + } + return 1; +} + +/* Define a macro. This is an interface to macro.c, which is shared + between gas and gasp. */ + +void +s_macro (ignore) + int ignore; +{ + char *file; + unsigned int line; + sb s; + sb label; + const char *err; + const char *name; + + as_where (&file, &line); + + sb_new (&s); + while (! is_end_of_line[(unsigned char) *input_line_pointer]) + sb_add_char (&s, *input_line_pointer++); + + sb_new (&label); + if (line_label != NULL) + sb_add_string (&label, S_GET_NAME (line_label)); + + err = define_macro (0, &s, &label, get_line_sb, &name); + if (err != NULL) + as_bad_where (file, line, "%s", err); + else + { + if (line_label != NULL) + { + S_SET_SEGMENT (line_label, undefined_section); + S_SET_VALUE (line_label, 0); + line_label->sy_frag = &zero_address_frag; + } + + if (((flag_m68k_mri +#ifdef NO_PSEUDO_DOT + || 1 +#endif + ) + && hash_find (po_hash, name) != NULL) + || (! flag_m68k_mri + && *name == '.' + && hash_find (po_hash, name + 1) != NULL)) + as_warn ("attempt to redefine pseudo-op `%s' ignored", + name); + } + + sb_kill (&s); +} + +/* Handle the .mexit pseudo-op, which immediately exits a macro + expansion. */ + +void +s_mexit (ignore) + int ignore; +{ + cond_exit_macro (macro_nest); + buffer_limit = input_scrub_next_buffer (&input_line_pointer); +} + +/* Switch in and out of MRI mode. */ + +void +s_mri (ignore) + int ignore; +{ + int on, old_flag; + + on = get_absolute_expression (); + old_flag = flag_mri; + if (on != 0) + { + flag_mri = 1; +#ifdef TC_M68K + flag_m68k_mri = 1; +#endif + } + else + { + flag_mri = 0; + flag_m68k_mri = 0; + } + +#ifdef MRI_MODE_CHANGE + if (on != old_flag) + MRI_MODE_CHANGE (on); +#endif + + demand_empty_rest_of_line (); +} + +/* Handle changing the location counter. */ + +static void +do_org (segment, exp, fill) + segT segment; + expressionS *exp; + int fill; +{ + if (segment != now_seg && segment != absolute_section) + as_bad ("invalid segment \"%s\"; segment \"%s\" assumed", + segment_name (segment), segment_name (now_seg)); + + if (now_seg == absolute_section) + { + if (fill != 0) + as_warn ("ignoring fill value in absolute section"); + if (exp->X_op != O_constant) + { + as_bad ("only constant offsets supported in absolute section"); + exp->X_add_number = 0; + } + abs_section_offset = exp->X_add_number; + } + else + { + char *p; + + p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, + exp->X_add_number, (char *) NULL); + *p = fill; + } +} + +void +s_org (ignore) + int ignore; +{ + register segT segment; + expressionS exp; + register long temp_fill; + + /* The m68k MRI assembler has a different meaning for .org. It + means to create an absolute section at a given address. We can't + support that--use a linker script instead. */ + if (flag_m68k_mri) + { + as_bad ("MRI style ORG pseudo-op not supported"); + ignore_rest_of_line (); + return; + } + + /* Don't believe the documentation of BSD 4.2 AS. There is no such + thing as a sub-segment-relative origin. Any absolute origin is + given a warning, then assumed to be segment-relative. Any + segmented origin expression ("foo+42") had better be in the right + segment or the .org is ignored. + + BSD 4.2 AS warns if you try to .org backwards. We cannot because + we never know sub-segment sizes when we are reading code. BSD + will crash trying to emit negative numbers of filler bytes in + certain .orgs. We don't crash, but see as-write for that code. + + Don't make frag if need_pass_2==1. */ + segment = get_known_segmented_expression (&exp); + if (*input_line_pointer == ',') + { + input_line_pointer++; + temp_fill = get_absolute_expression (); + } + else + temp_fill = 0; + + if (!need_pass_2) + do_org (segment, &exp, temp_fill); + + demand_empty_rest_of_line (); +} /* s_org() */ + +/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be + called by the obj-format routine which handles section changing + when in MRI mode. It will create a new section, and return it. It + will set *TYPE to the section type: one of 'C' (code), 'D' (data), + 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the + flags will be set in the section. */ + +void +s_mri_sect (type) + char *type; +{ +#ifdef TC_M68K + + char *name; + char c; + segT seg; + + SKIP_WHITESPACE (); + + name = input_line_pointer; + if (! isdigit ((unsigned char) *name)) + c = get_symbol_end (); + else + { + do + { + ++input_line_pointer; + } + while (isdigit ((unsigned char) *input_line_pointer)); + c = *input_line_pointer; + *input_line_pointer = '\0'; + } + + name = xstrdup (name); + + *input_line_pointer = c; + + seg = subseg_new (name, 0); + + if (*input_line_pointer == ',') + { + int align; + + ++input_line_pointer; + align = get_absolute_expression (); + record_alignment (seg, align); + } + + *type = 'C'; + if (*input_line_pointer == ',') + { + c = *++input_line_pointer; + c = toupper ((unsigned char) c); + if (c == 'C' || c == 'D' || c == 'M' || c == 'R') + *type = c; + else + as_bad ("unrecognized section type"); + ++input_line_pointer; + +#ifdef BFD_ASSEMBLER + { + flagword flags; + + flags = SEC_NO_FLAGS; + if (*type == 'C') + flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE; + else if (*type == 'D' || *type == 'M') + flags = SEC_ALLOC | SEC_LOAD | SEC_DATA; + else if (*type == 'R') + flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM; + if (flags != SEC_NO_FLAGS) + { + if (! bfd_set_section_flags (stdoutput, seg, flags)) + as_warn ("error setting flags for \"%s\": %s", + bfd_section_name (stdoutput, seg), + bfd_errmsg (bfd_get_error ())); + } + } +#endif + } + + /* Ignore the HP type. */ + if (*input_line_pointer == ',') + input_line_pointer += 2; + + demand_empty_rest_of_line (); + +#else /* ! TC_M68K */ +#ifdef TC_I960 + + char *name; + char c; + segT seg; + + SKIP_WHITESPACE (); + + name = input_line_pointer; + c = get_symbol_end (); + + name = xstrdup (name); + + *input_line_pointer = c; + + seg = subseg_new (name, 0); + + if (*input_line_pointer != ',') + *type = 'C'; + else + { + char *sectype; + + ++input_line_pointer; + SKIP_WHITESPACE (); + sectype = input_line_pointer; + c = get_symbol_end (); + if (*sectype == '\0') + *type = 'C'; + else if (strcasecmp (sectype, "text") == 0) + *type = 'C'; + else if (strcasecmp (sectype, "data") == 0) + *type = 'D'; + else if (strcasecmp (sectype, "romdata") == 0) + *type = 'R'; + else + as_warn ("unrecognized section type `%s'", sectype); + *input_line_pointer = c; + } + + if (*input_line_pointer == ',') + { + char *seccmd; + + ++input_line_pointer; + SKIP_WHITESPACE (); + seccmd = input_line_pointer; + c = get_symbol_end (); + if (strcasecmp (seccmd, "absolute") == 0) + { + as_bad ("absolute sections are not supported"); + *input_line_pointer = c; + ignore_rest_of_line (); + return; + } + else if (strcasecmp (seccmd, "align") == 0) + { + int align; + + *input_line_pointer = c; + align = get_absolute_expression (); + record_alignment (seg, align); + } + else + { + as_warn ("unrecognized section command `%s'", seccmd); + *input_line_pointer = c; + } + } + + demand_empty_rest_of_line (); + +#else /* ! TC_I960 */ + /* The MRI assembler seems to use different forms of .sect for + different targets. */ + abort (); +#endif /* ! TC_I960 */ +#endif /* ! TC_M68K */ +} + +/* Handle the .print pseudo-op. */ + +void +s_print (ignore) + int ignore; +{ + char *s; + int len; + + s = demand_copy_C_string (&len); + printf ("%s\n", s); + demand_empty_rest_of_line (); +} + +/* Handle the .purgem pseudo-op. */ + +void +s_purgem (ignore) + int ignore; +{ + if (is_it_end_of_statement ()) + { + demand_empty_rest_of_line (); + return; + } + + do + { + char *name; + char c; + + SKIP_WHITESPACE (); + name = input_line_pointer; + c = get_symbol_end (); + delete_macro (name); + *input_line_pointer = c; + SKIP_WHITESPACE (); + } + while (*input_line_pointer++ == ','); + + --input_line_pointer; + demand_empty_rest_of_line (); +} + +/* Handle the .rept pseudo-op. */ + +void +s_rept (ignore) + int ignore; +{ + int count; + sb one; + sb many; + + count = get_absolute_expression (); + + sb_new (&one); + if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb)) + { + as_bad ("rept without endr"); + return; + } + + sb_new (&many); + while (count-- > 0) + sb_add_sb (&many, &one); + + sb_kill (&one); + + input_scrub_include_sb (&many, input_line_pointer); + sb_kill (&many); + buffer_limit = input_scrub_next_buffer (&input_line_pointer); +} + +/* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then + this is .equiv, and it is an error if the symbol is already + defined. */ + +void +s_set (equiv) + int equiv; +{ + register char *name; + register char delim; + register char *end_name; + register symbolS *symbolP; + + /* + * Especial apologies for the random logic: + * this just grew, and could be parsed much more simply! + * Dean in haste. + */ + name = input_line_pointer; + delim = get_symbol_end (); + end_name = input_line_pointer; + *end_name = delim; + SKIP_WHITESPACE (); + + if (*input_line_pointer != ',') + { + *end_name = 0; + as_bad ("Expected comma after name \"%s\"", name); + *end_name = delim; + ignore_rest_of_line (); + return; + } + + input_line_pointer++; + *end_name = 0; + + if (name[0] == '.' && name[1] == '\0') + { + /* Turn '. = mumble' into a .org mumble */ + register segT segment; + expressionS exp; + + segment = get_known_segmented_expression (&exp); + + if (!need_pass_2) + do_org (segment, &exp, 0); + + *end_name = delim; + return; + } + + if ((symbolP = symbol_find (name)) == NULL + && (symbolP = md_undefined_symbol (name)) == NULL) + { + symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); +#ifdef OBJ_COFF + /* "set" symbols are local unless otherwise specified. */ + SF_SET_LOCAL (symbolP); +#endif /* OBJ_COFF */ + + } /* make a new symbol */ + + symbol_table_insert (symbolP); + + *end_name = delim; + + if (equiv + && S_IS_DEFINED (symbolP) + && S_GET_SEGMENT (symbolP) != reg_section) + as_bad ("symbol `%s' already defined", S_GET_NAME (symbolP)); + + pseudo_set (symbolP); + demand_empty_rest_of_line (); +} /* s_set() */ + +void +s_space (mult) + int mult; +{ + expressionS exp; + expressionS val; + char *p = 0; + char *stop = NULL; + char stopc; + int bytes; + +#ifdef md_flush_pending_output + md_flush_pending_output (); +#endif + + if (flag_mri) + stop = mri_comment_field (&stopc); + + /* In m68k MRI mode, we need to align to a word boundary, unless + this is ds.b. */ + if (flag_m68k_mri && mult > 1) + { + if (now_seg == absolute_section) + { + abs_section_offset += abs_section_offset & 1; + if (line_label != NULL) + S_SET_VALUE (line_label, abs_section_offset); + } + else if (mri_common_symbol != NULL) + { + valueT val; + + val = S_GET_VALUE (mri_common_symbol); + if ((val & 1) != 0) + { + S_SET_VALUE (mri_common_symbol, val + 1); + if (line_label != NULL) + { + know (line_label->sy_value.X_op == O_symbol); + know (line_label->sy_value.X_add_symbol == mri_common_symbol); + line_label->sy_value.X_add_number += 1; + } + } + } + else + { + do_align (1, (char *) NULL, 0, 0); + if (line_label != NULL) + { + line_label->sy_frag = frag_now; + S_SET_VALUE (line_label, frag_now_fix ()); + } + } + } + + bytes = mult; + + expression (&exp); + + SKIP_WHITESPACE (); + if (*input_line_pointer == ',') + { + ++input_line_pointer; + expression (&val); + } + else + { + val.X_op = O_constant; + val.X_add_number = 0; + } + + if (val.X_op != O_constant + || val.X_add_number < - 0x80 + || val.X_add_number > 0xff + || (mult != 0 && mult != 1 && val.X_add_number != 0)) + { + if (exp.X_op != O_constant) + as_bad ("Unsupported variable size or fill value"); + else + { + offsetT i; + + if (mult == 0) + mult = 1; + bytes = mult * exp.X_add_number; + for (i = 0; i < exp.X_add_number; i++) + emit_expr (&val, mult); + } + } + else + { + if (exp.X_op == O_constant) + { + long repeat; + + repeat = exp.X_add_number; + if (mult) + repeat *= mult; + bytes = repeat; + if (repeat <= 0) + { + if (! flag_mri || repeat < 0) + as_warn (".space repeat count is %s, ignored", + repeat ? "negative" : "zero"); + goto getout; + } + + /* If we are in the absolute section, just bump the offset. */ + if (now_seg == absolute_section) + { + abs_section_offset += repeat; + goto getout; + } + + /* If we are secretly in an MRI common section, then + creating space just increases the size of the common + symbol. */ + if (mri_common_symbol != NULL) + { + S_SET_VALUE (mri_common_symbol, + S_GET_VALUE (mri_common_symbol) + repeat); + goto getout; + } + + if (!need_pass_2) + p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, + (offsetT) repeat, (char *) 0); + } + else + { + if (now_seg == absolute_section) + { + as_bad ("space allocation too complex in absolute section"); + subseg_set (text_section, 0); + } + if (mri_common_symbol != NULL) + { + as_bad ("space allocation too complex in common section"); + mri_common_symbol = NULL; + } + if (!need_pass_2) + p = frag_var (rs_space, 1, 1, (relax_substateT) 0, + make_expr_symbol (&exp), (offsetT) 0, (char *) 0); + } + + if (p) + *p = val.X_add_number; + } + + getout: + + /* In MRI mode, after an odd number of bytes, we must align to an + even word boundary, unless the next instruction is a dc.b, ds.b + or dcb.b. */ + if (flag_mri && (bytes & 1) != 0) + mri_pending_align = 1; + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +/* This is like s_space, but the value is a floating point number with + the given precision. This is for the MRI dcb.s pseudo-op and + friends. */ + +void +s_float_space (float_type) + int float_type; +{ + offsetT count; + int flen; + char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; + char *stop = NULL; + char stopc; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + count = get_absolute_expression (); + + SKIP_WHITESPACE (); + if (*input_line_pointer != ',') + { + as_bad ("missing value"); + if (flag_mri) + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + + ++input_line_pointer; + + SKIP_WHITESPACE (); + + /* Skip any 0{letter} that may be present. Don't even check if the + * letter is legal. */ + if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) + input_line_pointer += 2; + + /* Accept :xxxx, where the x's are hex digits, for a floating point + with the exact digits specified. */ + if (input_line_pointer[0] == ':') + { + flen = hex_float (float_type, temp); + if (flen < 0) + { + if (flag_mri) + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + } + else + { + char *err; + + err = md_atof (float_type, temp, &flen); + know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); + know (flen > 0); + if (err) + { + as_bad ("Bad floating literal: %s", err); + if (flag_mri) + mri_comment_end (stop, stopc); + ignore_rest_of_line (); + return; + } + } + + while (--count >= 0) + { + char *p; + + p = frag_more (flen); + memcpy (p, temp, (unsigned int) flen); + } + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + +/* Handle the .struct pseudo-op, as found in MIPS assemblers. */ + +void +s_struct (ignore) + int ignore; +{ + char *stop = NULL; + char stopc; + + if (flag_mri) + stop = mri_comment_field (&stopc); + abs_section_offset = get_absolute_expression (); + subseg_set (absolute_section, 0); + if (flag_mri) + mri_comment_end (stop, stopc); + demand_empty_rest_of_line (); +} + +void +s_text (ignore) + int ignore; +{ + register int temp; + + temp = get_absolute_expression (); + subseg_set (text_section, (subsegT) temp); + demand_empty_rest_of_line (); +#ifdef OBJ_VMS + const_flag &= ~IN_DEFAULT_SECTION; +#endif +} /* s_text() */ + + +void +demand_empty_rest_of_line () +{ + SKIP_WHITESPACE (); + if (is_end_of_line[(unsigned char) *input_line_pointer]) + { + input_line_pointer++; + } + else + { + ignore_rest_of_line (); + } + /* Return having already swallowed end-of-line. */ +} /* Return pointing just after end-of-line. */ + +void +ignore_rest_of_line () /* For suspect lines: gives warning. */ +{ + if (!is_end_of_line[(unsigned char) *input_line_pointer]) + { + if (isprint (*input_line_pointer)) + as_bad ("Rest of line ignored. First ignored character is `%c'.", + *input_line_pointer); + else + as_bad ("Rest of line ignored. First ignored character valued 0x%x.", + *input_line_pointer); + while (input_line_pointer < buffer_limit + && !is_end_of_line[(unsigned char) *input_line_pointer]) + { + input_line_pointer++; + } + } + input_line_pointer++; /* Return pointing just after end-of-line. */ + know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); +} + +/* + * pseudo_set() + * + * In: Pointer to a symbol. + * Input_line_pointer->expression. + * + * Out: Input_line_pointer->just after any whitespace after expression. + * Tried to set symbol to value of expression. + * Will change symbols type, value, and frag; + */ +void +pseudo_set (symbolP) + symbolS *symbolP; +{ + expressionS exp; +#if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) + int ext; +#endif /* OBJ_AOUT or OBJ_BOUT */ + + know (symbolP); /* NULL pointer is logic error. */ +#if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) + ext = S_IS_EXTERNAL (symbolP); +#endif /* OBJ_AOUT or OBJ_BOUT */ + + (void) expression (&exp); + + if (exp.X_op == O_illegal) + as_bad ("illegal expression; zero assumed"); + else if (exp.X_op == O_absent) + as_bad ("missing expression; zero assumed"); + else if (exp.X_op == O_big) + as_bad ("%s number invalid; zero assumed", + exp.X_add_number > 0 ? "bignum" : "floating point"); + else if (exp.X_op == O_subtract + && (S_GET_SEGMENT (exp.X_add_symbol) + == S_GET_SEGMENT (exp.X_op_symbol)) + && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) + && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) + { + exp.X_op = O_constant; + exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) + - S_GET_VALUE (exp.X_op_symbol)); + } + + switch (exp.X_op) + { + case O_illegal: + case O_absent: + case O_big: + exp.X_add_number = 0; + /* Fall through. */ + case O_constant: + S_SET_SEGMENT (symbolP, absolute_section); +#if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) + if (ext) + S_SET_EXTERNAL (symbolP); + else + S_CLEAR_EXTERNAL (symbolP); +#endif /* OBJ_AOUT or OBJ_BOUT */ + S_SET_VALUE (symbolP, (valueT) exp.X_add_number); + symbolP->sy_frag = &zero_address_frag; + break; + + case O_register: + S_SET_SEGMENT (symbolP, reg_section); + S_SET_VALUE (symbolP, (valueT) exp.X_add_number); + symbolP->sy_frag = &zero_address_frag; + break; + + case O_symbol: + if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section + || exp.X_add_number != 0) + symbolP->sy_value = exp; + else + { + symbolS *s = exp.X_add_symbol; + + S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); +#if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) + if (ext) + S_SET_EXTERNAL (symbolP); + else + S_CLEAR_EXTERNAL (symbolP); +#endif /* OBJ_AOUT or OBJ_BOUT */ + S_SET_VALUE (symbolP, + exp.X_add_number + S_GET_VALUE (s)); + symbolP->sy_frag = s->sy_frag; + copy_symbol_attributes (symbolP, s); + } + break; + + default: + /* The value is some complex expression. + FIXME: Should we set the segment to anything? */ + symbolP->sy_value = exp; + break; + } +} + +/* + * cons() + * + * CONStruct more frag of .bytes, or .words etc. + * Should need_pass_2 be 1 then emit no frag(s). + * This understands EXPRESSIONS. + * + * Bug (?) + * + * This has a split personality. We use expression() to read the + * value. We can detect if the value won't fit in a byte or word. + * But we can't detect if expression() discarded significant digits + * in the case of a long. Not worth the crocks required to fix it. + */ + +/* Select a parser for cons expressions. */ + +/* Some targets need to parse the expression in various fancy ways. + You can define TC_PARSE_CONS_EXPRESSION to do whatever you like + (for example, the HPPA does this). Otherwise, you can define + BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or + REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these + are defined, which is the normal case, then only simple expressions + are permitted. */ + +static void +parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); + +#ifndef TC_PARSE_CONS_EXPRESSION +#ifdef BITFIELD_CONS_EXPRESSIONS +#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) +static void +parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); +#endif +#ifdef REPEAT_CONS_EXPRESSIONS +#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) +static void +parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); +#endif + +/* If we haven't gotten one yet, just call expression. */ +#ifndef TC_PARSE_CONS_EXPRESSION +#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) +#endif +#endif + +/* worker to do .byte etc statements */ +/* clobbers input_line_pointer, checks */ +/* end-of-line. */ +static void +cons_worker (nbytes, rva) + register int nbytes; /* 1=.byte, 2=.word, 4=.long */ + int rva; +{ + int c; + expressionS exp; + char *stop = NULL; + char stopc; + +#ifdef md_flush_pending_output + md_flush_pending_output (); +#endif + + if (flag_mri) + stop = mri_comment_field (&stopc); + + if (is_it_end_of_statement ()) + { + if (flag_mri) + mri_comment_end (stop, stopc); + demand_empty_rest_of_line (); + return; + } + +#ifdef md_cons_align + md_cons_align (nbytes); +#endif + + c = 0; + do + { + if (flag_m68k_mri) + parse_mri_cons (&exp, (unsigned int) nbytes); + else + TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); + + if (rva) + { + if (exp.X_op == O_symbol) + exp.X_op = O_symbol_rva; + else + as_fatal ("rva without symbol"); + } + emit_expr (&exp, (unsigned int) nbytes); + ++c; + } + while (*input_line_pointer++ == ','); + + /* In MRI mode, after an odd number of bytes, we must align to an + even word boundary, unless the next instruction is a dc.b, ds.b + or dcb.b. */ + if (flag_mri && nbytes == 1 && (c & 1) != 0) + mri_pending_align = 1; + + input_line_pointer--; /* Put terminator back into stream. */ + + if (flag_mri) + mri_comment_end (stop, stopc); + + demand_empty_rest_of_line (); +} + + +void +cons (size) + int size; +{ + cons_worker (size, 0); +} + +void +s_rva (size) + int size; +{ + cons_worker (size, 1); +} + + +/* Put the contents of expression EXP into the object file using + NBYTES bytes. If need_pass_2 is 1, this does nothing. */ + +void +emit_expr (exp, nbytes) + expressionS *exp; + unsigned int nbytes; +{ + operatorT op; + register char *p; + valueT extra_digit = 0; + + /* Don't do anything if we are going to make another pass. */ + if (need_pass_2) + return; + + op = exp->X_op; + + /* Allow `.word 0' in the absolute section. */ + if (now_seg == absolute_section) + { + if (op != O_constant || exp->X_add_number != 0) + as_bad ("attempt to store value in absolute section"); + abs_section_offset += nbytes; + return; + } + + /* Handle a negative bignum. */ + if (op == O_uminus + && exp->X_add_number == 0 + && exp->X_add_symbol->sy_value.X_op == O_big + && exp->X_add_symbol->sy_value.X_add_number > 0) + { + int i; + unsigned long carry; + + exp = &exp->X_add_symbol->sy_value; + + /* Negate the bignum: one's complement each digit and add 1. */ + carry = 1; + for (i = 0; i < exp->X_add_number; i++) + { + unsigned long next; + + next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) + & LITTLENUM_MASK) + + carry); + generic_bignum[i] = next & LITTLENUM_MASK; + carry = next >> LITTLENUM_NUMBER_OF_BITS; + } + + /* We can ignore any carry out, because it will be handled by + extra_digit if it is needed. */ + + extra_digit = (valueT) -1; + op = O_big; + } + + if (op == O_absent || op == O_illegal) + { + as_warn ("zero assumed for missing expression"); + exp->X_add_number = 0; + op = O_constant; + } + else if (op == O_big && exp->X_add_number <= 0) + { + as_bad ("floating point number invalid; zero assumed"); + exp->X_add_number = 0; + op = O_constant; + } + else if (op == O_register) + { + as_warn ("register value used as expression"); + op = O_constant; + } + + p = frag_more ((int) nbytes); + +#ifndef WORKING_DOT_WORD + /* If we have the difference of two symbols in a word, save it on + the broken_words list. See the code in write.c. */ + if (op == O_subtract && nbytes == 2) + { + struct broken_word *x; + + x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); + x->next_broken_word = broken_words; + broken_words = x; + x->frag = frag_now; + x->word_goes_here = p; + x->dispfrag = 0; + x->add = exp->X_add_symbol; + x->sub = exp->X_op_symbol; + x->addnum = exp->X_add_number; + x->added = 0; + new_broken_words++; + return; + } +#endif + + /* If we have an integer, but the number of bytes is too large to + pass to md_number_to_chars, handle it as a bignum. */ + if (op == O_constant && nbytes > sizeof (valueT)) + { + valueT val; + int gencnt; + + if (! exp->X_unsigned && exp->X_add_number < 0) + extra_digit = (valueT) -1; + val = (valueT) exp->X_add_number; + gencnt = 0; + do + { + generic_bignum[gencnt] = val & LITTLENUM_MASK; + val >>= LITTLENUM_NUMBER_OF_BITS; + ++gencnt; + } + while (val != 0); + op = exp->X_op = O_big; + exp->X_add_number = gencnt; + } + + if (op == O_constant) + { + register valueT get; + register valueT use; + register valueT mask; + valueT hibit; + register valueT unmask; + + /* JF << of >= number of bits in the object is undefined. In + particular SPARC (Sun 4) has problems */ + if (nbytes >= sizeof (valueT)) + { + mask = 0; + if (nbytes > sizeof (valueT)) + hibit = 0; + else + hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); + } + else + { + /* Don't store these bits. */ + mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); + hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); + } + + unmask = ~mask; /* Do store these bits. */ + +#ifdef NEVER + "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; + mask = ~(unmask >> 1); /* Includes sign bit now. */ +#endif + + get = exp->X_add_number; + use = get & unmask; + if ((get & mask) != 0 + && ((get & mask) != mask + || (get & hibit) == 0)) + { /* Leading bits contain both 0s & 1s. */ + as_warn ("Value 0x%lx truncated to 0x%lx.", + (unsigned long) get, (unsigned long) use); + } + /* put bytes in right order. */ + md_number_to_chars (p, use, (int) nbytes); + } + else if (op == O_big) + { + int size; + LITTLENUM_TYPE *nums; + + know (nbytes % CHARS_PER_LITTLENUM == 0); + + size = exp->X_add_number * CHARS_PER_LITTLENUM; + if (nbytes < size) + { + as_warn ("Bignum truncated to %d bytes", nbytes); + size = nbytes; + } + + if (target_big_endian) + { + while (nbytes > size) + { + md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); + nbytes -= CHARS_PER_LITTLENUM; + p += CHARS_PER_LITTLENUM; + } + + nums = generic_bignum + size / CHARS_PER_LITTLENUM; + while (size > 0) + { + --nums; + md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); + size -= CHARS_PER_LITTLENUM; + p += CHARS_PER_LITTLENUM; + } + } + else + { + nums = generic_bignum; + while (size > 0) + { + md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); + ++nums; + size -= CHARS_PER_LITTLENUM; + p += CHARS_PER_LITTLENUM; + nbytes -= CHARS_PER_LITTLENUM; + } + + while (nbytes > 0) + { + md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); + nbytes -= CHARS_PER_LITTLENUM; + p += CHARS_PER_LITTLENUM; + } + } + } + else + { + memset (p, 0, nbytes); + + /* Now we need to generate a fixS to record the symbol value. + This is easy for BFD. For other targets it can be more + complex. For very complex cases (currently, the HPPA and + NS32K), you can define TC_CONS_FIX_NEW to do whatever you + want. For simpler cases, you can define TC_CONS_RELOC to be + the name of the reloc code that should be stored in the fixS. + If neither is defined, the code uses NO_RELOC if it is + defined, and otherwise uses 0. */ + +#ifdef BFD_ASSEMBLER +#ifdef TC_CONS_FIX_NEW + TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); +#else + { + bfd_reloc_code_real_type r; + + switch (nbytes) + { + case 1: + r = BFD_RELOC_8; + break; + case 2: + r = BFD_RELOC_16; + break; + case 4: + r = BFD_RELOC_32; + break; + case 8: + r = BFD_RELOC_64; + break; + default: + as_bad ("unsupported BFD relocation size %u", nbytes); + r = BFD_RELOC_32; + break; + } + fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, + 0, r); + } +#endif +#else +#ifdef TC_CONS_FIX_NEW + TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); +#else + /* Figure out which reloc number to use. Use TC_CONS_RELOC if + it is defined, otherwise use NO_RELOC if it is defined, + otherwise use 0. */ +#ifndef TC_CONS_RELOC +#ifdef NO_RELOC +#define TC_CONS_RELOC NO_RELOC +#else +#define TC_CONS_RELOC 0 +#endif +#endif + fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, + TC_CONS_RELOC); +#endif /* TC_CONS_FIX_NEW */ +#endif /* BFD_ASSEMBLER */ + } +} + +#ifdef BITFIELD_CONS_EXPRESSIONS + +/* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as + w:x,y:z, where w and y are bitwidths and x and y are values. They + then pack them all together. We do a little better in that we allow + them in words, longs, etc. and we'll pack them in target byte order + for you. + + The rules are: pack least significat bit first, if a field doesn't + entirely fit, put it in the next unit. Overflowing the bitfield is + explicitly *not* even a warning. The bitwidth should be considered + a "mask". + + To use this function the tc-XXX.h file should define + BITFIELD_CONS_EXPRESSIONS. */ + +static void +parse_bitfield_cons (exp, nbytes) + expressionS *exp; + unsigned int nbytes; +{ + unsigned int bits_available = BITS_PER_CHAR * nbytes; + char *hold = input_line_pointer; + + (void) expression (exp); + + if (*input_line_pointer == ':') + { /* bitfields */ + long value = 0; + + for (;;) + { + unsigned long width; + + if (*input_line_pointer != ':') + { + input_line_pointer = hold; + break; + } /* next piece is not a bitfield */ + + /* In the general case, we can't allow + full expressions with symbol + differences and such. The relocation + entries for symbols not defined in this + assembly would require arbitrary field + widths, positions, and masks which most + of our current object formats don't + support. + + In the specific case where a symbol + *is* defined in this assembly, we + *could* build fixups and track it, but + this could lead to confusion for the + backends. I'm lazy. I'll take any + SEG_ABSOLUTE. I think that means that + you can use a previous .set or + .equ type symbol. xoxorich. */ + + if (exp->X_op == O_absent) + { + as_warn ("using a bit field width of zero"); + exp->X_add_number = 0; + exp->X_op = O_constant; + } /* implied zero width bitfield */ + + if (exp->X_op != O_constant) + { + *input_line_pointer = '\0'; + as_bad ("field width \"%s\" too complex for a bitfield", hold); + *input_line_pointer = ':'; + demand_empty_rest_of_line (); + return; + } /* too complex */ + + if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) + { + as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits", + width, nbytes, (BITS_PER_CHAR * nbytes)); + width = BITS_PER_CHAR * nbytes; + } /* too big */ + + if (width > bits_available) + { + /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ + input_line_pointer = hold; + exp->X_add_number = value; + break; + } /* won't fit */ + + hold = ++input_line_pointer; /* skip ':' */ + + (void) expression (exp); + if (exp->X_op != O_constant) + { + char cache = *input_line_pointer; + + *input_line_pointer = '\0'; + as_bad ("field value \"%s\" too complex for a bitfield", hold); + *input_line_pointer = cache; + demand_empty_rest_of_line (); + return; + } /* too complex */ + + value |= ((~(-1 << width) & exp->X_add_number) + << ((BITS_PER_CHAR * nbytes) - bits_available)); + + if ((bits_available -= width) == 0 + || is_it_end_of_statement () + || *input_line_pointer != ',') + { + break; + } /* all the bitfields we're gonna get */ + + hold = ++input_line_pointer; + (void) expression (exp); + } /* forever loop */ + + exp->X_add_number = value; + exp->X_op = O_constant; + exp->X_unsigned = 1; + } /* if looks like a bitfield */ +} /* parse_bitfield_cons() */ + +#endif /* BITFIELD_CONS_EXPRESSIONS */ + +/* Handle an MRI style string expression. */ + +static void +parse_mri_cons (exp, nbytes) + expressionS *exp; + unsigned int nbytes; +{ + if (*input_line_pointer != '\'' + && (input_line_pointer[1] != '\'' + || (*input_line_pointer != 'A' + && *input_line_pointer != 'E'))) + TC_PARSE_CONS_EXPRESSION (exp, nbytes); + else + { + int scan = 0; + unsigned int result = 0; + + /* An MRI style string. Cut into as many bytes as will fit into + a nbyte chunk, left justify if necessary, and separate with + commas so we can try again later. */ + if (*input_line_pointer == 'A') + ++input_line_pointer; + else if (*input_line_pointer == 'E') + { + as_bad ("EBCDIC constants are not supported"); + ++input_line_pointer; + } + + input_line_pointer++; + for (scan = 0; scan < nbytes; scan++) + { + if (*input_line_pointer == '\'') + { + if (input_line_pointer[1] == '\'') + { + input_line_pointer++; + } + else + break; + } + result = (result << 8) | (*input_line_pointer++); + } + + /* Left justify */ + while (scan < nbytes) + { + result <<= 8; + scan++; + } + /* Create correct expression */ + exp->X_op = O_constant; + exp->X_add_number = result; + /* Fake it so that we can read the next char too */ + if (input_line_pointer[0] != '\'' || + (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) + { + input_line_pointer -= 2; + input_line_pointer[0] = ','; + input_line_pointer[1] = '\''; + } + else + input_line_pointer++; + } +} + +#ifdef REPEAT_CONS_EXPRESSIONS + +/* Parse a repeat expression for cons. This is used by the MIPS + assembler. The format is NUMBER:COUNT; NUMBER appears in the + object file COUNT times. + + To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ + +static void +parse_repeat_cons (exp, nbytes) + expressionS *exp; + unsigned int nbytes; +{ + expressionS count; + register int i; + + expression (exp); + + if (*input_line_pointer != ':') + { + /* No repeat count. */ + return; + } + + ++input_line_pointer; + expression (&count); + if (count.X_op != O_constant + || count.X_add_number <= 0) + { + as_warn ("Unresolvable or nonpositive repeat count; using 1"); + return; + } + + /* The cons function is going to output this expression once. So we + output it count - 1 times. */ + for (i = count.X_add_number - 1; i > 0; i--) + emit_expr (exp, nbytes); +} + +#endif /* REPEAT_CONS_EXPRESSIONS */ + +/* Parse a floating point number represented as a hex constant. This + permits users to specify the exact bits they want in the floating + point number. */ + +static int +hex_float (float_type, bytes) + int float_type; + char *bytes; +{ + int length; + int i; + + switch (float_type) + { + case 'f': + case 'F': + case 's': + case 'S': + length = 4; + break; + + case 'd': + case 'D': + case 'r': + case 'R': + length = 8; + break; + + case 'x': + case 'X': + length = 12; + break; + + case 'p': + case 'P': + length = 12; + break; + + default: + as_bad ("Unknown floating type type '%c'", float_type); + return -1; + } + + /* It would be nice if we could go through expression to parse the + hex constant, but if we get a bignum it's a pain to sort it into + the buffer correctly. */ + i = 0; + while (hex_p (*input_line_pointer) || *input_line_pointer == '_') + { + int d; + + /* The MRI assembler accepts arbitrary underscores strewn about + through the hex constant, so we ignore them as well. */ + if (*input_line_pointer == '_') + { + ++input_line_pointer; + continue; + } + + if (i >= length) + { + as_warn ("Floating point constant too large"); + return -1; + } + d = hex_value (*input_line_pointer) << 4; + ++input_line_pointer; + while (*input_line_pointer == '_') + ++input_line_pointer; + if (hex_p (*input_line_pointer)) + { + d += hex_value (*input_line_pointer); + ++input_line_pointer; + } + if (target_big_endian) + bytes[i] = d; + else + bytes[length - i - 1] = d; + ++i; + } + + if (i < length) + { + if (target_big_endian) + memset (bytes + i, 0, length - i); + else + memset (bytes, 0, length - i); + } + + return length; +} + +/* + * float_cons() + * + * CONStruct some more frag chars of .floats .ffloats etc. + * Makes 0 or more new frags. + * If need_pass_2 == 1, no frags are emitted. + * This understands only floating literals, not expressions. Sorry. + * + * A floating constant is defined by atof_generic(), except it is preceded + * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its + * reading, I decided to be incompatible. This always tries to give you + * rounded bits to the precision of the pseudo-op. Former AS did premature + * truncatation, restored noisy bits instead of trailing 0s AND gave you + * a choice of 2 flavours of noise according to which of 2 floating-point + * scanners you directed AS to use. + * + * In: input_line_pointer->whitespace before, or '0' of flonum. + * + */ + +void +float_cons (float_type) + /* Clobbers input_line-pointer, checks end-of-line. */ + register int float_type; /* 'f':.ffloat ... 'F':.float ... */ +{ + register char *p; + int length; /* Number of chars in an object. */ + register char *err; /* Error from scanning floating literal. */ + char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; + + if (is_it_end_of_statement ()) + { + demand_empty_rest_of_line (); + return; + } + +#ifdef md_flush_pending_output + md_flush_pending_output (); +#endif + + do + { + /* input_line_pointer->1st char of a flonum (we hope!). */ + SKIP_WHITESPACE (); + + /* Skip any 0{letter} that may be present. Don't even check if the + * letter is legal. Someone may invent a "z" format and this routine + * has no use for such information. Lusers beware: you get + * diagnostics if your input is ill-conditioned. + */ + if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) + input_line_pointer += 2; + + /* Accept :xxxx, where the x's are hex digits, for a floating + point with the exact digits specified. */ + if (input_line_pointer[0] == ':') + { + ++input_line_pointer; + length = hex_float (float_type, temp); + if (length < 0) + { + ignore_rest_of_line (); + return; + } + } + else + { + err = md_atof (float_type, temp, &length); + know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); + know (length > 0); + if (err) + { + as_bad ("Bad floating literal: %s", err); + ignore_rest_of_line (); + return; + } + } + + if (!need_pass_2) + { + int count; + + count = 1; + +#ifdef REPEAT_CONS_EXPRESSIONS + if (*input_line_pointer == ':') + { + expressionS count_exp; + + ++input_line_pointer; + expression (&count_exp); + if (count_exp.X_op != O_constant + || count_exp.X_add_number <= 0) + { + as_warn ("unresolvable or nonpositive repeat count; using 1"); + } + else + count = count_exp.X_add_number; + } +#endif + + while (--count >= 0) + { + p = frag_more (length); + memcpy (p, temp, (unsigned int) length); + } + } + SKIP_WHITESPACE (); + } + while (*input_line_pointer++ == ','); + + --input_line_pointer; /* Put terminator back into stream. */ + demand_empty_rest_of_line (); +} /* float_cons() */ + +/* + * stringer() + * + * We read 0 or more ',' seperated, double-quoted strings. + * + * Caller should have checked need_pass_2 is FALSE because we don't check it. + */ + + +void +stringer (append_zero) /* Worker to do .ascii etc statements. */ + /* Checks end-of-line. */ + register int append_zero; /* 0: don't append '\0', else 1 */ +{ + register unsigned int c; + +#ifdef md_flush_pending_output + md_flush_pending_output (); +#endif + + /* + * The following awkward logic is to parse ZERO or more strings, + * comma seperated. Recall a string expression includes spaces + * before the opening '\"' and spaces after the closing '\"'. + * We fake a leading ',' if there is (supposed to be) + * a 1st, expression. We keep demanding expressions for each + * ','. + */ + if (is_it_end_of_statement ()) + { + c = 0; /* Skip loop. */ + ++input_line_pointer; /* Compensate for end of loop. */ + } + else + { + c = ','; /* Do loop. */ + } + while (c == ',' || c == '<' || c == '"') + { + SKIP_WHITESPACE (); + switch (*input_line_pointer) + { + case '\"': + ++input_line_pointer; /*->1st char of string. */ + while (is_a_char (c = next_char_of_string ())) + { + FRAG_APPEND_1_CHAR (c); + } + if (append_zero) + { + FRAG_APPEND_1_CHAR (0); + } + know (input_line_pointer[-1] == '\"'); + break; + case '<': + input_line_pointer++; + c = get_single_number (); + FRAG_APPEND_1_CHAR (c); + if (*input_line_pointer != '>') + { + as_bad ("Expected <nn>"); + } + input_line_pointer++; + break; + case ',': + input_line_pointer++; + break; + } + SKIP_WHITESPACE (); + c = *input_line_pointer; + } + + demand_empty_rest_of_line (); +} /* stringer() */ + +/* FIXME-SOMEDAY: I had trouble here on characters with the + high bits set. We'll probably also have trouble with + multibyte chars, wide chars, etc. Also be careful about + returning values bigger than 1 byte. xoxorich. */ + +unsigned int +next_char_of_string () +{ + register unsigned int c; + + c = *input_line_pointer++ & CHAR_MASK; + switch (c) + { + case '\"': + c = NOT_A_CHAR; + break; + + case '\n': + as_warn ("Unterminated string: Newline inserted."); + bump_line_counters (); + break; + +#ifndef NO_STRING_ESCAPES + case '\\': + switch (c = *input_line_pointer++) + { + case 'b': + c = '\b'; + break; + + case 'f': + c = '\f'; + break; + + case 'n': + c = '\n'; + break; + + case 'r': + c = '\r'; + break; + + case 't': + c = '\t'; + break; + + case 'v': + c = '\013'; + break; + + case '\\': + case '"': + break; /* As itself. */ + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + { + long number; + int i; + + for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) + { + number = number * 8 + c - '0'; + } + c = number & 0xff; + } + --input_line_pointer; + break; + + case 'x': + case 'X': + { + long number; + + number = 0; + c = *input_line_pointer++; + while (isxdigit (c)) + { + if (isdigit (c)) + number = number * 16 + c - '0'; + else if (isupper (c)) + number = number * 16 + c - 'A' + 10; + else + number = number * 16 + c - 'a' + 10; + c = *input_line_pointer++; + } + c = number & 0xff; + --input_line_pointer; + } + break; + + case '\n': + /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ + as_warn ("Unterminated string: Newline inserted."); + c = '\n'; + bump_line_counters (); + break; + + default: + +#ifdef ONLY_STANDARD_ESCAPES + as_bad ("Bad escaped character in string, '?' assumed"); + c = '?'; +#endif /* ONLY_STANDARD_ESCAPES */ + + break; + } /* switch on escaped char */ + break; +#endif /* ! defined (NO_STRING_ESCAPES) */ + + default: + break; + } /* switch on char */ + return (c); +} /* next_char_of_string() */ + +static segT +get_segmented_expression (expP) + register expressionS *expP; +{ + register segT retval; + + retval = expression (expP); + if (expP->X_op == O_illegal + || expP->X_op == O_absent + || expP->X_op == O_big) + { + as_bad ("expected address expression; zero assumed"); + expP->X_op = O_constant; + expP->X_add_number = 0; + retval = absolute_section; + } + return retval; +} + +static segT +get_known_segmented_expression (expP) + register expressionS *expP; +{ + register segT retval; + + if ((retval = get_segmented_expression (expP)) == undefined_section) + { + /* There is no easy way to extract the undefined symbol from the + expression. */ + if (expP->X_add_symbol != NULL + && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) + as_warn ("symbol \"%s\" undefined; zero assumed", + S_GET_NAME (expP->X_add_symbol)); + else + as_warn ("some symbol undefined; zero assumed"); + retval = absolute_section; + expP->X_op = O_constant; + expP->X_add_number = 0; + } + know (retval == absolute_section || SEG_NORMAL (retval)); + return (retval); +} /* get_known_segmented_expression() */ + +offsetT +get_absolute_expression () +{ + expressionS exp; + + expression (&exp); + if (exp.X_op != O_constant) + { + if (exp.X_op != O_absent) + as_bad ("bad or irreducible absolute expression; zero assumed"); + exp.X_add_number = 0; + } + return exp.X_add_number; +} + +char /* return terminator */ +get_absolute_expression_and_terminator (val_pointer) + long *val_pointer; /* return value of expression */ +{ + /* FIXME: val_pointer should probably be offsetT *. */ + *val_pointer = (long) get_absolute_expression (); + return (*input_line_pointer++); +} + +/* + * demand_copy_C_string() + * + * Like demand_copy_string, but return NULL if the string contains any '\0's. + * Give a warning if that happens. + */ +char * +demand_copy_C_string (len_pointer) + int *len_pointer; +{ + register char *s; + + if ((s = demand_copy_string (len_pointer)) != 0) + { + register int len; + + for (len = *len_pointer; len > 0; len--) + { + if (*s == 0) + { + s = 0; + len = 1; + *len_pointer = 0; + as_bad ("This string may not contain \'\\0\'"); + } + } + } + return s; +} + +/* + * demand_copy_string() + * + * Demand string, but return a safe (=private) copy of the string. + * Return NULL if we can't read a string here. + */ +char * +demand_copy_string (lenP) + int *lenP; +{ + register unsigned int c; + register int len; + char *retval; + + len = 0; + SKIP_WHITESPACE (); + if (*input_line_pointer == '\"') + { + input_line_pointer++; /* Skip opening quote. */ + + while (is_a_char (c = next_char_of_string ())) + { + obstack_1grow (¬es, c); + len++; + } + /* JF this next line is so demand_copy_C_string will return a + null terminated string. */ + obstack_1grow (¬es, '\0'); + retval = obstack_finish (¬es); + } + else + { + as_warn ("Missing string"); + retval = NULL; + ignore_rest_of_line (); + } + *lenP = len; + return (retval); +} /* demand_copy_string() */ + +/* + * is_it_end_of_statement() + * + * In: Input_line_pointer->next character. + * + * Do: Skip input_line_pointer over all whitespace. + * + * Out: 1 if input_line_pointer->end-of-line. +*/ +int +is_it_end_of_statement () +{ + SKIP_WHITESPACE (); + return (is_end_of_line[(unsigned char) *input_line_pointer]); +} /* is_it_end_of_statement() */ + +void +equals (sym_name, reassign) + char *sym_name; + int reassign; +{ + register symbolS *symbolP; /* symbol we are working with */ + char *stop; + char stopc; + + input_line_pointer++; + if (*input_line_pointer == '=') + input_line_pointer++; + + while (*input_line_pointer == ' ' || *input_line_pointer == '\t') + input_line_pointer++; + + if (flag_mri) + stop = mri_comment_field (&stopc); + + if (sym_name[0] == '.' && sym_name[1] == '\0') + { + /* Turn '. = mumble' into a .org mumble */ + register segT segment; + expressionS exp; + + segment = get_known_segmented_expression (&exp); + if (!need_pass_2) + do_org (segment, &exp, 0); + } + else + { + symbolP = symbol_find_or_make (sym_name); + /* Permit register names to be redefined. */ + if (! reassign + && S_IS_DEFINED (symbolP) + && S_GET_SEGMENT (symbolP) != reg_section) + as_bad ("symbol `%s' already defined", S_GET_NAME (symbolP)); + pseudo_set (symbolP); + } + + if (flag_mri) + mri_comment_end (stop, stopc); +} /* equals() */ + +/* .include -- include a file at this point. */ + +/* ARGSUSED */ +void +s_include (arg) + int arg; +{ + char *newbuf; + char *filename; + int i; + FILE *try; + char *path; + + if (! flag_m68k_mri) + filename = demand_copy_string (&i); + else + { + SKIP_WHITESPACE (); + i = 0; + while (! is_end_of_line[(unsigned char) *input_line_pointer] + && *input_line_pointer != ' ' + && *input_line_pointer != '\t') + { + obstack_1grow (¬es, *input_line_pointer); + ++input_line_pointer; + ++i; + } + obstack_1grow (¬es, '\0'); + filename = obstack_finish (¬es); + while (! is_end_of_line[(unsigned char) *input_line_pointer]) + ++input_line_pointer; + } + demand_empty_rest_of_line (); + path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); + for (i = 0; i < include_dir_count; i++) + { + strcpy (path, include_dirs[i]); + strcat (path, "/"); + strcat (path, filename); + if (0 != (try = fopen (path, "r"))) + { + fclose (try); + goto gotit; + } + } + free (path); + path = filename; +gotit: + /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ + newbuf = input_scrub_include_file (path, input_line_pointer); + buffer_limit = input_scrub_next_buffer (&input_line_pointer); +} /* s_include() */ + +void +add_include_dir (path) + char *path; +{ + int i; + + if (include_dir_count == 0) + { + include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); + include_dirs[0] = "."; /* Current dir */ + include_dir_count = 2; + } + else + { + include_dir_count++; + include_dirs = (char **) realloc (include_dirs, + include_dir_count * sizeof (*include_dirs)); + } + + include_dirs[include_dir_count - 1] = path; /* New one */ + + i = strlen (path); + if (i > include_dir_maxlen) + include_dir_maxlen = i; +} /* add_include_dir() */ + +void +s_ignore (arg) + int arg; +{ + while (!is_end_of_line[(unsigned char) *input_line_pointer]) + { + ++input_line_pointer; + } + ++input_line_pointer; +} + + +void +read_print_statistics (file) + FILE *file; +{ + hash_print_statistics (file, "pseudo-op table", po_hash); +} + +/* end of read.c */ |
