3a69b3aca6
Cherrypick from master 1991-04-04 18:19:53 UTC K. Richard Pixley <rich@cygnus> 'Initial revision':
gas/COPYING
gas/ChangeLog
gas/Makefile.in
gas/README
gas/app.c
gas/as.c
gas/as.h
gas/atof-generic.c
gas/bignum-copy.c
gas/bignum.h
gas/cond.c
gas/config/atof-ieee.c
gas/config/atof-vax.c
gas/config/obj-aout.c
gas/config/obj-aout.h
gas/config/obj-bout.c
gas/config/obj-bout.h
gas/config/obj-coff.c
gas/config/obj-coff.h
gas/config/tc-a29k.c
gas/config/tc-a29k.h
gas/config/tc-generic.c
gas/config/tc-generic.h
gas/config/tc-i386.c
gas/config/tc-i386.h
gas/config/tc-i860.c
gas/config/tc-i860.h
gas/config/tc-i960.c
gas/config/tc-i960.h
gas/config/tc-m68851.h
gas/config/tc-m68k.c
gas/config/tc-m68k.h
gas/config/tc-ns32k.c
gas/config/tc-ns32k.h
gas/config/tc-sparc.c
gas/config/tc-sparc.h
gas/config/tc-vax.c
gas/config/tc-vax.h
gas/config/te-generic.h
gas/config/te-ic960.h
gas/config/te-sun3.h
gas/config/vax-inst.h
gas/configure
gas/configure.in
gas/debug.c
gas/expr.c
gas/expr.h
gas/flonum-copy.c
gas/flonum-mult.c
gas/flonum.h
gas/frags.c
gas/frags.h
gas/hash.c
gas/hash.h
gas/input-file.c
gas/input-file.h
gas/input-scrub.c
gas/messages.c
gas/obj.h
gas/output-file.c
gas/output-file.h
gas/read.c
gas/read.h
gas/struc-symbol.h
gas/subsegs.c
gas/subsegs.h
gas/symbols.c
gas/symbols.h
gas/tc.h
gas/write.c
gas/write.h
ld/ld.h
ld/ldexp.c
ld/ldfile.c
ld/ldfile.h
ld/ldlang.h
ld/ldlex.h
ld/ldmain.h
ld/ldmisc.h
ld/ldwrite.h
Cherrypick from master 1991-03-21 21:29:06 UTC David Henkel-Wallace <gumby@cygnus> 'Initial revision':
ld/ldexp.h
ld/ldgram.y
ld/ldlang.c
ld/ldlex.l
ld/ldmain.c
ld/ldmisc.c
ld/ldwrite.c
Cherrypick from master 1991-01-17 15:34:55 UTC Roland Pesch <pesch@cygnus> 'Initial revision':
gas/doc/as.texinfo
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/* subsegs.h -> subsegs.c
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Copyright (C) 1987 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* For every sub-segment the user mentions in the ASsembler program,
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* we make one struct frchain. Each sub-segment has exactly one struct frchain
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* and vice versa.
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*
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* Struct frchain's are forward chained (in ascending order of sub-segment
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* code number). The chain runs through frch_next of each subsegment.
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* This makes it hard to find a subsegment's frags
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* if programmer uses a lot of them. Most programs only use text0 and
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* data0, so they don't suffer. At least this way:
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* (1) There are no "arbitrary" restrictions on how many subsegments
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* can be programmed;
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* (2) Subsegments' frchain-s are (later) chained together in the order in
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* which they are emitted for object file viz text then data.
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*
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* From each struct frchain dangles a chain of struct frags. The frags
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* represent code fragments, for that sub-segment, forward chained.
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*/
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struct frchain /* control building of a frag chain */
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{ /* FRCH = FRagment CHain control */
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struct frag * frch_root; /* 1st struct frag in chain, or NULL */
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struct frag * frch_last; /* last struct frag in chain, or NULL */
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struct frchain * frch_next; /* next in chain of struct frchain-s */
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segT frch_seg; /* SEG_TEXT or SEG_DATA. */
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subsegT frch_subseg; /* subsegment number of this chain */
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};
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typedef struct frchain frchainS;
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extern frchainS * frchain_root; /* NULL means no frchains yet. */
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/* all subsegments' chains hang off here */
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extern frchainS * frchain_now;
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/* Frchain we are assembling into now */
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/* That is, the current segment's frag */
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/* chain, even if it contains no (complete) */
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/* frags. */
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extern frchainS * data0_frchainP;
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/* Sentinel for frchain crawling. */
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/* Points to the 1st data-segment frchain. */
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/* (Which is pointed to by the last text- */
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/* segment frchain.) */
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/* end: subsegs.h */
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