X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gas%2Ffrags.h;h=6d84aaab3f66376488eebf6eb5efa611e6024cd5;hb=747cfc8c6bb23d40b3fa987f6c3df9d3a0d7b817;hp=9590292a4da644f39617aebe0e173039eaf4007c;hpb=5b64ad42d36e6d487e1f7287d37fbc243a178e72;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/frags.h b/gas/frags.h index 9590292a4d..6d84aaab3f 100644 --- a/gas/frags.h +++ b/gas/frags.h @@ -1,12 +1,11 @@ /* frags.h - Header file for the frag concept. - Copyright (C) 1987, 92, 93, 94, 95, 97, 1998 - Free Software Foundation, Inc. + Copyright (C) 1987-2019 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) + the Free Software Foundation; either version 3, or (at your option) any later version. GAS is distributed in the hope that it will be useful, @@ -16,54 +15,71 @@ 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. */ + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ #ifndef FRAGS_H #define FRAGS_H -#ifdef ANSI_PROTOTYPES struct obstack; -#endif -/* - * 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 -{ - /* Object file address. */ +/* 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 { + /* Object file address (as an octet offset). */ addressT fr_address; - /* Chain forward; ascending address order. Rooted in frch_root. */ - struct frag *fr_next; - - /* (Fixed) number of chars we know we have. May be 0. */ - offsetT fr_fix; - /* (Variable) number of chars after above. May be 0. */ + /* When relaxing multiple times, remember the address the frag had + in the last relax pass. */ + addressT last_fr_address; + + /* (Fixed) number of octets we know we have. May be 0. */ + valueT fr_fix; + /* May be used for (Variable) number of octets after above. + The generic frag handling code no longer makes any use of fr_var. */ offsetT fr_var; - /* For variable-length tail. */ - struct symbol *fr_symbol; - /* For variable-length tail. */ + /* For variable-length tail. */ offsetT fr_offset; + /* For variable-length tail. */ + symbolS *fr_symbol; /* Points to opcode low addr byte, for relaxation. */ char *fr_opcode; + /* Chain forward; ascending address order. Rooted in frch_root. */ + struct frag *fr_next; + + /* Where the frag was created, or where it became a variant frag. */ + const char *fr_file; + unsigned int fr_line; + #ifndef NO_LISTING struct list_info_struct *line; #endif + /* A serial number for a sequence of frags having at most one alignment + or org frag, and that at the tail of the sequence. */ + unsigned int region:16; + + /* Flipped each relax pass so we can easily determine whether + fr_address has been adjusted. */ + unsigned int relax_marker:1; + + /* Used to ensure that all insns are emitted on proper address + boundaries. */ + unsigned int has_code:1; + unsigned int insn_addr:6; + /* What state is my tail in? */ relax_stateT fr_type; relax_substateT fr_subtype; @@ -83,76 +99,65 @@ struct frag #ifdef TC_FRAG_TYPE TC_FRAG_TYPE tc_frag_data; #endif - - /* Where the frag was created, or where it became a variant frag. */ - char *fr_file; - unsigned int fr_line; +#ifdef OBJ_FRAG_TYPE + OBJ_FRAG_TYPE obj_frag_data; +#endif /* Data begins here. */ char fr_literal[1]; }; #define SIZEOF_STRUCT_FRAG \ -((char *)zero_address_frag.fr_literal-(char *)&zero_address_frag) -/* We want to say fr_literal[0] above. */ +((char *) zero_address_frag.fr_literal - (char *) &zero_address_frag) +/* We want to say fr_literal[0] above. */ /* Current frag we are building. This frag is incomplete. It is, however, included in frchain_now. The fr_fix field is bogus; instead, use frag_now_fix (). */ COMMON fragS *frag_now; -extern addressT frag_now_fix PARAMS ((void)); +extern addressT frag_now_fix (void); +extern addressT frag_now_fix_octets (void); -/* For foreign-segment symbol fixups. */ +/* For foreign-segment symbol fixups. */ COMMON fragS zero_address_frag; -/* For local common (N_BSS segment) fixups. */ -COMMON fragS bss_address_frag; - -#if 0 -/* - * A macro to speed up appending exactly 1 char - * to current frag. - */ -/* JF changed < 1 to <= 1 to avoid a race conditon */ -#define FRAG_APPEND_1_CHAR(datum) \ -{ \ - if (obstack_room( &frags ) <= 1) {\ - frag_wane (frag_now); \ - frag_new (0); \ - } \ - obstack_1grow( &frags, datum ); \ -} -#else -extern void frag_append_1_char PARAMS ((int)); -#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X) -#endif +COMMON fragS predefined_address_frag; +extern void frag_append_1_char (int); +#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X) -void frag_init PARAMS ((void)); -fragS *frag_alloc PARAMS ((struct obstack *)); -void frag_grow PARAMS ((unsigned int nchars)); -char *frag_more PARAMS ((int nchars)); -void frag_align PARAMS ((int alignment, int fill_character, int max)); -void frag_align_pattern PARAMS ((int alignment, - const char *fill_pattern, - int n_fill, - int max)); -void frag_new PARAMS ((int old_frags_var_max_size)); -void frag_wane PARAMS ((fragS * fragP)); - -char *frag_variant PARAMS ((relax_stateT type, - int max_chars, - int var, - relax_substateT subtype, - symbolS * symbol, - offsetT offset, - char *opcode)); - -char *frag_var PARAMS ((relax_stateT type, - int max_chars, - int var, - relax_substateT subtype, - symbolS * symbol, - offsetT offset, - char *opcode)); +void frag_init (void); +fragS *frag_alloc (struct obstack *); +void frag_grow (size_t nchars); +char *frag_more (size_t nchars); +void frag_align (int alignment, int fill_character, int max); +void frag_align_pattern (int alignment, const char *fill_pattern, + size_t n_fill, int max); +void frag_align_code (int alignment, int max); +void frag_new (size_t old_frags_var_max_size); +void frag_wane (fragS * fragP); +size_t frag_room (void); + +char *frag_variant (relax_stateT type, + size_t max_chars, + size_t var, + relax_substateT subtype, + symbolS * symbol, + offsetT offset, + char *opcode); + +char *frag_var (relax_stateT type, + size_t max_chars, + size_t var, + relax_substateT subtype, + symbolS * symbol, + offsetT offset, + char *opcode); + +bfd_boolean frag_offset_fixed_p (const fragS *, const fragS *, offsetT *); +bfd_boolean frag_gtoffset_p (valueT, const fragS *, valueT, const fragS *, + offsetT *); + +int get_frag_count (void); +void clear_frag_count (void); #endif /* FRAGS_H */