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Diffstat (limited to 'gas/as.h')
| -rw-r--r-- | gas/as.h | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/gas/as.h b/gas/as.h new file mode 100644 index 0000000..f956893 --- /dev/null +++ b/gas/as.h @@ -0,0 +1,397 @@ +/* as.h - global header file + Copyright (C) 1987, 1990, 1991 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* static const char rcsid[] = "$Id$"; */ + +#define GAS 1 + +#include "host.h" +#include "flonum.h" + +#ifndef __STDC__ +#define volatile /**/ +#ifndef const +#define const /**/ +#endif /* const */ +#endif /* __STDC__ */ + +#ifdef __GNUC__ +#define alloca __builtin_alloca +#define register +#endif /* __GNUC__ */ + +#ifndef __LINE__ +#define __LINE__ "unknown" +#endif /* __LINE__ */ + +#ifndef __FILE__ +#define __FILE__ "unknown" +#endif /* __FILE__ */ + +/* + * I think this stuff is largely out of date. xoxorich. + * + * CAPITALISED names are #defined. + * "lowercaseH" is #defined if "lowercase.h" has been #include-d. + * "lowercaseT" is a typedef of "lowercase" objects. + * "lowercaseP" is type "pointer to object of type 'lowercase'". + * "lowercaseS" is typedef struct ... lowercaseS. + * + * #define DEBUG to enable all the "know" assertion tests. + * #define SUSPECT when debugging. + * #define COMMON as "extern" for all modules except one, where you #define + * COMMON as "". + * If TEST is #defined, then we are testing a module: #define COMMON as "". + */ + +/* These #defines are for parameters of entire assembler. */ + +/* #define SUSPECT JF remove for speed testing */ +/* These #includes are for type definitions etc. */ + +#include <stdio.h> +#include <assert.h> + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free xfree + +#define BAD_CASE(value) \ +{ \ + as_fatal("Case value %d unexpected at line %d of file \"%s\"\n", \ + value, __LINE__, __FILE__); \ +} + + +/* These are assembler-wide concepts */ + + +#ifndef COMMON +#ifdef TEST +#define COMMON /* declare our COMMONs storage here. */ +#else +#define COMMON extern /* our commons live elswhere */ +#endif +#endif + /* COMMON now defined */ +#define DEBUG /* temporary */ + +#ifdef DEBUG +#undef NDEBUG +#define know(p) assert(p) /* Verify our assumptions! */ +#else +#define know(p) /* know() checks are no-op.ed */ +#endif + + +#define xfree free + +/* input_scrub.c */ + +/* + * Supplies sanitised buffers to read.c. + * Also understands printing line-number part of error messages. + */ + + +/* subsegs.c Sub-segments. Also, segment(=expression type)s.*/ + +/* + * This table describes the use of segments as EXPRESSION types. + * + * X_seg X_add_symbol X_subtract_symbol X_add_number + * SEG_ABSENT no (legal) expression + * SEG_PASS1 no (defined) " + * SEG_BIG * > 32 bits const. + * SEG_ABSOLUTE 0 + * SEG_DATA * 0 + * SEG_TEXT * 0 + * SEG_BSS * 0 + * SEG_UNKNOWN * 0 + * SEG_DIFFERENCE 0 * 0 + * SEG_REGISTER * + * + * The blank fields MUST be 0, and are nugatory. + * The '0' fields MAY be 0. The '*' fields MAY NOT be 0. + * + * SEG_BIG: X_add_number is < 0 if the result is in + * generic_floating_point_number. The value is -'c' where c is the + * character that introduced the constant. e.g. "0f6.9" will have -'f' + * as a X_add_number value. + * X_add_number > 0 is a count of how many littlenums it took to + * represent a bignum. + * SEG_DIFFERENCE: + * If segments of both symbols are known, they are the same segment. + * X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE). + */ + +typedef enum { + SEG_ABSOLUTE = 0, + SEG_TEXT, + SEG_DATA, + SEG_BSS, + SEG_UNKNOWN, + SEG_ABSENT, /* Mythical Segment (absent): NO expression seen. */ + SEG_PASS1, /* Mythical Segment: Need another pass. */ + SEG_GOOF, /* Only happens if AS has a logic error. */ + /* Invented so we don't crash printing */ + /* error message involving weird segment. */ + SEG_BIG, /* Bigger than 32 bits constant. */ + SEG_DIFFERENCE, /* Mythical Segment: absolute difference. */ + SEG_DEBUG, /* Debug segment */ + SEG_NTV, /* Transfert vector preload segment */ + SEG_PTV, /* Transfert vector postload segment */ + SEG_REGISTER, /* Mythical: a register-valued expression */ +} segT; + +#define SEG_MAXIMUM_ORDINAL (SEG_REGISTER) + +typedef int subsegT; + +COMMON subsegT now_subseg; + /* What subseg we are accreting now? */ + + +COMMON segT now_seg; + /* Segment our instructions emit to. */ + /* Only OK values are SEG_TEXT or SEG_DATA. */ + + +extern char *const seg_name[]; +extern int section_alignment[]; + + +/* relax() */ + +typedef enum +{ + rs_fill, /* Variable chars to be repeated fr_offset */ + /* times. Fr_symbol unused. */ + /* Used with fr_offset == 0 for a constant */ + /* length frag. */ + + rs_align, /* Align: Fr_offset: power of 2. */ + /* 1 variable char: fill character. */ + rs_org, /* Org: Fr_offset, fr_symbol: address. */ + /* 1 variable char: fill character. */ + + rs_machine_dependent, +#ifndef WORKING_DOT_WORD + rs_broken_word, /* JF: gunpoint */ +#endif +} +relax_stateT; + +/* typedef unsigned char relax_substateT; */ +/* JF this is more likely to leave the end of a struct frag on an align + boundry. Be very careful with this. */ +typedef unsigned long relax_substateT; + +typedef unsigned long relax_addressT;/* Enough bits for address. */ + /* Still an integer type. */ + + +/* frags.c */ + +/* + * A code fragment (frag) is some known number of chars, followed by some + * unknown number of chars. Typically the unknown number of chars is an + * instruction address whose size is yet unknown. We always know the greatest + * possible size the unknown number of chars may become, and reserve that + * much room at the end of the frag. + * Once created, frags do not change address during assembly. + * We chain the frags in (a) forward-linked list(s). The object-file address + * of the 1st char of a frag is generally not known until after relax(). + * Many things at assembly time describe an address by {object-file-address + * of a particular frag}+offset. + + BUG: it may be smarter to have a single pointer off to various different +notes for different frag kinds. See how code pans + */ +struct frag /* a code fragment */ +{ + unsigned long fr_address; /* Object file address. */ + struct frag *fr_next; /* Chain forward; ascending address order. */ + /* Rooted in frch_root. */ + + long fr_fix; /* (Fixed) number of chars we know we have. */ + /* May be 0. */ + long fr_var; /* (Variable) number of chars after above. */ + /* May be 0. */ + struct symbol *fr_symbol; /* For variable-length tail. */ + long fr_offset; /* For variable-length tail. */ + char *fr_opcode; /*->opcode low addr byte,for relax()ation*/ + relax_stateT fr_type; /* What state is my tail in? */ + relax_substateT fr_subtype; + /* These are needed only on the NS32K machines */ + char fr_pcrel_adjust; + char fr_bsr; + char fr_literal [1]; /* Chars begin here. */ + /* One day we will compile fr_literal[0]. */ +}; +#define SIZEOF_STRUCT_FRAG \ + ((int)zero_address_frag.fr_literal-(int)&zero_address_frag) + /* We want to say fr_literal[0] above. */ + +typedef struct frag fragS; + +COMMON fragS * frag_now; /* -> current frag we are building. */ + /* This frag is incomplete. */ + /* It is, however, included in frchain_now. */ + /* Frag_now->fr_fix is bogus. Use: */ +/* Virtual frag_now->fr_fix==obstack_next_free(&frags)-frag_now->fr_literal.*/ + +COMMON fragS zero_address_frag; /* For foreign-segment symbol fixups. */ +COMMON fragS bss_address_frag; /* For local common (N_BSS segment) fixups. */ + +/* main program "as.c" (command arguments etc) */ + +COMMON char +flagseen[128]; /* ['x'] TRUE if "-x" seen. */ + +COMMON char * +out_file_name; /* name of emitted object file */ + +COMMON int need_pass_2; /* TRUE if we need a second pass. */ + +typedef struct { + char * poc_name; /* assembler mnemonic, lower case, no '.' */ + void (*poc_handler)(); /* Do the work */ + int poc_val; /* Value to pass to handler */ +} pseudo_typeS; + +#if defined(__STDC__) & !defined(NO_STDARG) + +int had_errors(void); +int had_warnings(void); +void as_bad(const char *Format, ...); +void as_fatal(const char *Format, ...); +void as_tsktsk(const char *Format, ...); +void as_warn(const char *Format, ...); + +#else + +int had_errors(); +int had_warnings(); +void as_bad(); +void as_fatal(); +void as_tsktsk(); +void as_warn(); + +#endif /* __STDC__ & !NO_STDARG */ + +#ifdef __STDC__ + +char *app_push(void); +char *atof_ieee(char *str, int what_kind, LITTLENUM_TYPE *words); +char *input_scrub_include_file(char *filename, char *position); +char *input_scrub_new_file(char *filename); +char *input_scrub_next_buffer(char **bufp); +char *strstr(const char *s, const char *wanted); +char *xmalloc(int size); +char *xrealloc(char *ptr, long n); +int do_scrub_next_char(int (*get)(), void (*unget)()); +int gen_to_words(LITTLENUM_TYPE *words, int precision, long exponent_bits); +int had_err(void); +int had_errors(void); +int had_warnings(void); +int ignore_input(void); +int scrub_from_file(void); +int scrub_from_file(void); +int scrub_from_string(void); +int seen_at_least_1_file(void); +void app_pop(char *arg); +void as_howmuch(FILE *stream); +void as_perror(char *gripe, char *filename); +void as_where(void); +void bump_line_counters(void); +void do_scrub_begin(void); +void input_scrub_begin(void); +void input_scrub_close(void); +void input_scrub_end(void); +void int_to_gen(long x); +void new_logical_line(char *fname, int line_number); +void scrub_to_file(int ch); +void scrub_to_string(int ch); +void subseg_change(segT seg, int subseg); +void subseg_new(segT seg, subsegT subseg); +void subsegs_begin(void); + +#else /* __STDC__ */ + +char *app_push(); +char *atof_ieee(); +char *input_scrub_include_file(); +char *input_scrub_new_file(); +char *input_scrub_next_buffer(); +char *strstr(); +char *xmalloc(); +char *xrealloc(); +int do_scrub_next_char(); +int gen_to_words(); +int had_err(); +int had_errors(); +int had_warnings(); +int ignore_input(); +int scrub_from_file(); +int scrub_from_file(); +int scrub_from_string(); +int seen_at_least_1_file(); +void app_pop(); +void as_howmuch(); +void as_perror(); +void as_where(); +void bump_line_counters(); +void do_scrub_begin(); +void input_scrub_begin(); +void input_scrub_close(); +void input_scrub_end(); +void int_to_gen(); +void new_logical_line(); +void scrub_to_file(); +void scrub_to_string(); +void subseg_change(); +void subseg_new(); +void subsegs_begin(); + +#endif /* __STDC__ */ + + /* this one starts the chain of target dependant headers */ +#include "targ-env.h" + + /* these define types needed by the interfaces */ +#include "struc-symbol.h" +#include "reloc.h" +#include "write.h" +#include "expr.h" +#include "frags.h" +#include "hash.h" +#include "read.h" +#include "symbols.h" + +#include "tc.h" +#include "obj.h" + +/* + * Local Variables: + * comment-column: 0 + * fill-column: 131 + * End: + */ + +/* end: as.h */ |