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-rw-r--r--gas/subsegs.c618
1 files changed, 0 insertions, 618 deletions
diff --git a/gas/subsegs.c b/gas/subsegs.c
deleted file mode 100644
index bdf28688bd1..00000000000
--- a/gas/subsegs.c
+++ /dev/null
@@ -1,618 +0,0 @@
-/* subsegs.c - subsegments -
- Copyright (C) 1987, 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. */
-
-/*
- * Segments & sub-segments.
- */
-
-#include "as.h"
-
-#include "subsegs.h"
-#include "obstack.h"
-
-frchainS *frchain_root, *frchain_now;
-
-static struct obstack frchains;
-
-#ifndef BFD_ASSEMBLER
-#ifdef MANY_SEGMENTS
-segment_info_type segment_info[SEG_MAXIMUM_ORDINAL];
-
-#else
-/* Commented in "subsegs.h". */
-frchainS *data0_frchainP, *bss0_frchainP;
-
-#endif /* MANY_SEGMENTS */
-char const *const seg_name[] =
-{
- "absolute",
-#ifdef MANY_SEGMENTS
- "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7", "e8", "e9",
- "e10", "e11", "e12", "e13", "e14", "e15", "e16", "e17", "e18", "e19",
- "e20", "e21", "e22", "e23", "e24", "e25", "e26", "e27", "e28", "e29",
- "e30", "e31", "e32", "e33", "e34", "e35", "e36", "e37", "e38", "e39",
-#else
- "text",
- "data",
- "bss",
-#endif /* MANY_SEGMENTS */
- "unknown",
- "ASSEMBLER-INTERNAL-LOGIC-ERROR!",
- "expr",
- "debug",
- "transfert vector preload",
- "transfert vector postload",
- "register",
- "",
-}; /* Used by error reporters, dumpers etc. */
-#else /* BFD_ASSEMBLER */
-
-/* Gas segment information for bfd_abs_section_ptr and
- bfd_und_section_ptr. */
-static segment_info_type *abs_seg_info;
-static segment_info_type *und_seg_info;
-
-#endif /* BFD_ASSEMBLER */
-
-static void subseg_set_rest PARAMS ((segT, subsegT));
-
-static fragS dummy_frag;
-
-static frchainS absolute_frchain;
-
-void
-subsegs_begin ()
-{
- /* Check table(s) seg_name[], seg_N_TYPE[] is in correct order */
-#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
- know (SEG_ABSOLUTE == 0);
- know (SEG_TEXT == 1);
- know (SEG_DATA == 2);
- know (SEG_BSS == 3);
- know (SEG_UNKNOWN == 4);
- know (SEG_GOOF == 5);
- know (SEG_EXPR == 6);
- know (SEG_DEBUG == 7);
- know (SEG_NTV == 8);
- know (SEG_PTV == 9);
- know (SEG_REGISTER == 10);
- know (SEG_MAXIMUM_ORDINAL == SEG_REGISTER);
-#endif
-
- obstack_begin (&frchains, chunksize);
-#if __GNUC__ >= 2
- obstack_alignment_mask (&frchains) = __alignof__ (frchainS) - 1;
-#endif
-
- frchain_root = NULL;
- frchain_now = NULL; /* Warn new_subseg() that we are booting. */
-
- frag_now = &dummy_frag;
-
-#ifndef BFD_ASSEMBLER
- now_subseg = 42; /* Lie for 1st call to subseg_new. */
-#ifdef MANY_SEGMENTS
- {
- int i;
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- subseg_set (i, 0);
- segment_info[i].frchainP = frchain_now;
- }
- }
-#else
- subseg_set (SEG_DATA, 0); /* .data 0 */
- data0_frchainP = frchain_now;
-
- subseg_set (SEG_BSS, 0);
- bss0_frchainP = frchain_now;
-
-#endif /* ! MANY_SEGMENTS */
-#endif /* ! BFD_ASSEMBLER */
-
- absolute_frchain.frch_seg = absolute_section;
- absolute_frchain.frch_subseg = 0;
-#ifdef BFD_ASSEMBLER
- absolute_frchain.fix_root = absolute_frchain.fix_tail = 0;
-#endif
- absolute_frchain.frch_frag_now = &zero_address_frag;
- absolute_frchain.frch_root = absolute_frchain.frch_last = &zero_address_frag;
-}
-
-/*
- * subseg_change()
- *
- * Change the subsegment we are in, BUT DO NOT MAKE A NEW FRAG for the
- * subsegment. If we are already in the correct subsegment, change nothing.
- * This is used eg as a worker for subseg_set [which does make a new frag_now]
- * and for changing segments after we have read the source. We construct eg
- * fixSs even after the source file is read, so we do have to keep the
- * segment context correct.
- */
-void
-subseg_change (seg, subseg)
- register segT seg;
- register int subseg;
-{
- now_seg = seg;
- now_subseg = subseg;
-
- if (now_seg == absolute_section)
- return;
-
-#ifdef BFD_ASSEMBLER
- {
- segment_info_type *seginfo;
- seginfo = (segment_info_type *) bfd_get_section_userdata (stdoutput, seg);
- if (! seginfo)
- {
- seginfo = (segment_info_type *) xmalloc (sizeof (*seginfo));
- memset ((PTR) seginfo, 0, sizeof (*seginfo));
- seginfo->fix_root = NULL;
- seginfo->fix_tail = NULL;
- seginfo->bfd_section = seg;
- seginfo->sym = 0;
- if (seg == bfd_abs_section_ptr)
- abs_seg_info = seginfo;
- else if (seg == bfd_und_section_ptr)
- und_seg_info = seginfo;
- else
- bfd_set_section_userdata (stdoutput, seg, (PTR) seginfo);
- }
- }
-#else
-#ifdef MANY_SEGMENTS
- seg_fix_rootP = &segment_info[seg].fix_root;
- seg_fix_tailP = &segment_info[seg].fix_tail;
-#else
- if (seg == SEG_DATA)
- {
- seg_fix_rootP = &data_fix_root;
- seg_fix_tailP = &data_fix_tail;
- }
- else if (seg == SEG_TEXT)
- {
- seg_fix_rootP = &text_fix_root;
- seg_fix_tailP = &text_fix_tail;
- }
- else
- {
- know (seg == SEG_BSS);
- seg_fix_rootP = &bss_fix_root;
- seg_fix_tailP = &bss_fix_tail;
- }
-
-#endif
-#endif
-}
-
-static void
-subseg_set_rest (seg, subseg)
- segT seg;
- subsegT subseg;
-{
- register frchainS *frcP; /* crawl frchain chain */
- register frchainS **lastPP; /* address of last pointer */
- frchainS *newP; /* address of new frchain */
-
- mri_common_symbol = NULL;
-
- if (frag_now && frchain_now)
- frchain_now->frch_frag_now = frag_now;
-
- assert (frchain_now == 0
- || now_seg == undefined_section
- || now_seg == absolute_section
- || frchain_now->frch_last == frag_now);
-
- subseg_change (seg, (int) subseg);
-
- if (seg == absolute_section)
- {
- frchain_now = &absolute_frchain;
- frag_now = &zero_address_frag;
- return;
- }
-
- assert (frchain_now == 0
- || now_seg == undefined_section
- || frchain_now->frch_last == frag_now);
-
- /*
- * Attempt to find or make a frchain for that sub seg.
- * Crawl along chain of frchainSs, begins @ frchain_root.
- * If we need to make a frchainS, link it into correct
- * position of chain rooted in frchain_root.
- */
- for (frcP = *(lastPP = &frchain_root);
- frcP && frcP->frch_seg <= seg;
- frcP = *(lastPP = &frcP->frch_next))
- {
- if (frcP->frch_seg == seg
- && frcP->frch_subseg >= subseg)
- {
- break;
- }
- }
- /*
- * frcP: Address of the 1st frchainS in correct segment with
- * frch_subseg >= subseg.
- * We want to either use this frchainS, or we want
- * to insert a new frchainS just before it.
- *
- * If frcP==NULL, then we are at the end of the chain
- * of frchainS-s. A NULL frcP means we fell off the end
- * of the chain looking for a
- * frch_subseg >= subseg, so we
- * must make a new frchainS.
- *
- * If we ever maintain a pointer to
- * the last frchainS in the chain, we change that pointer
- * ONLY when frcP==NULL.
- *
- * lastPP: Address of the pointer with value frcP;
- * Never NULL.
- * May point to frchain_root.
- *
- */
- if (!frcP
- || (frcP->frch_seg > seg
- || frcP->frch_subseg > subseg)) /* Kinky logic only works with 2 segments. */
- {
- /*
- * This should be the only code that creates a frchainS.
- */
- newP = (frchainS *) obstack_alloc (&frchains, sizeof (frchainS));
- newP->frch_subseg = subseg;
- newP->frch_seg = seg;
-#ifdef BFD_ASSEMBLER
- newP->fix_root = NULL;
- newP->fix_tail = NULL;
-#endif
- obstack_begin (&newP->frch_obstack, chunksize);
-#if __GNUC__ >= 2
- obstack_alignment_mask (&newP->frch_obstack) = __alignof__ (fragS) - 1;
-#endif
- newP->frch_frag_now = frag_alloc (&newP->frch_obstack);
- newP->frch_frag_now->fr_type = rs_fill;
-
- newP->frch_root = newP->frch_last = newP->frch_frag_now;
-
- *lastPP = newP;
- newP->frch_next = frcP; /* perhaps NULL */
-
-#ifdef BFD_ASSEMBLER
- {
- segment_info_type *seginfo;
- seginfo = seg_info (seg);
- if (seginfo && seginfo->frchainP == frcP)
- seginfo->frchainP = newP;
- }
-#endif
-
- frcP = newP;
- }
- /*
- * Here with frcP pointing to the frchainS for subseg.
- */
- frchain_now = frcP;
- frag_now = frcP->frch_frag_now;
-
- assert (frchain_now->frch_last == frag_now);
-}
-
-/*
- * subseg_set(segT, subsegT)
- *
- * If you attempt to change to the current subsegment, nothing happens.
- *
- * In: segT, subsegT code for new subsegment.
- * frag_now -> incomplete frag for current subsegment.
- * If frag_now==NULL, then there is no old, incomplete frag, so
- * the old frag is not closed off.
- *
- * Out: now_subseg, now_seg updated.
- * Frchain_now points to the (possibly new) struct frchain for this
- * sub-segment.
- * Frchain_root updated if needed.
- */
-
-#ifndef BFD_ASSEMBLER
-
-segT
-subseg_new (segname, subseg)
- const char *segname;
- subsegT subseg;
-{
- int i;
-
- for (i = 0; i < (int) SEG_MAXIMUM_ORDINAL; i++)
- {
- const char *s;
-
- s = segment_name ((segT) i);
- if (strcmp (segname, s) == 0
- || (segname[0] == '.'
- && strcmp (segname + 1, s) == 0))
- {
- subseg_set ((segT) i, subseg);
- return (segT) i;
- }
-#ifdef obj_segment_name
- s = obj_segment_name ((segT) i);
- if (strcmp (segname, s) == 0
- || (segname[0] == '.'
- && strcmp (segname + 1, s) == 0))
- {
- subseg_set ((segT) i, subseg);
- return (segT) i;
- }
-#endif
- }
-
-#ifdef obj_add_segment
- {
- segT new_seg;
- new_seg = obj_add_segment (segname);
- subseg_set (new_seg, subseg);
- return new_seg;
- }
-#else
- as_bad (_("Attempt to switch to nonexistent segment \"%s\""), segname);
- return now_seg;
-#endif
-}
-
-void
-subseg_set (seg, subseg) /* begin assembly for a new sub-segment */
- register segT seg; /* SEG_DATA or SEG_TEXT */
- register subsegT subseg;
-{
-#ifndef MANY_SEGMENTS
- know (seg == SEG_DATA
- || seg == SEG_TEXT
- || seg == SEG_BSS
- || seg == SEG_ABSOLUTE);
-#endif
-
- if (seg != now_seg || subseg != now_subseg)
- { /* we just changed sub-segments */
- subseg_set_rest (seg, subseg);
- }
- mri_common_symbol = NULL;
-}
-
-#else /* BFD_ASSEMBLER */
-
-segT
-subseg_get (segname, force_new)
- const char *segname;
- int force_new;
-{
- segT secptr;
- segment_info_type *seginfo;
- const char *now_seg_name = (now_seg
- ? bfd_get_section_name (stdoutput, now_seg)
- : 0);
-
- if (!force_new
- && now_seg_name
- && (now_seg_name == segname
- || !strcmp (now_seg_name, segname)))
- return now_seg;
-
- if (!force_new)
- secptr = bfd_make_section_old_way (stdoutput, segname);
- else
- secptr = bfd_make_section_anyway (stdoutput, segname);
-
- seginfo = seg_info (secptr);
- if (! seginfo)
- {
- /* Check whether output_section is set first because secptr may
- be bfd_abs_section_ptr. */
- if (secptr->output_section != secptr)
- secptr->output_section = secptr;
- seginfo = (segment_info_type *) xmalloc (sizeof (*seginfo));
- memset ((PTR) seginfo, 0, sizeof (*seginfo));
- seginfo->fix_root = NULL;
- seginfo->fix_tail = NULL;
- seginfo->bfd_section = secptr;
- if (secptr == bfd_abs_section_ptr)
- abs_seg_info = seginfo;
- else if (secptr == bfd_und_section_ptr)
- und_seg_info = seginfo;
- else
- bfd_set_section_userdata (stdoutput, secptr, (PTR) seginfo);
- seginfo->frchainP = NULL;
- seginfo->lineno_list_head = seginfo->lineno_list_tail = NULL;
- seginfo->sym = NULL;
- seginfo->dot = NULL;
- }
- return secptr;
-}
-
-segT
-subseg_new (segname, subseg)
- const char *segname;
- subsegT subseg;
-{
- segT secptr;
- segment_info_type *seginfo;
-
- secptr = subseg_get (segname, 0);
- subseg_set_rest (secptr, subseg);
- seginfo = seg_info (secptr);
- if (! seginfo->frchainP)
- seginfo->frchainP = frchain_now;
- return secptr;
-}
-
-/* Like subseg_new, except a new section is always created, even if
- a section with that name already exists. */
-segT
-subseg_force_new (segname, subseg)
- const char *segname;
- subsegT subseg;
-{
- segT secptr;
- segment_info_type *seginfo;
-
- secptr = subseg_get (segname, 1);
- subseg_set_rest (secptr, subseg);
- seginfo = seg_info (secptr);
- if (! seginfo->frchainP)
- seginfo->frchainP = frchain_now;
- return secptr;
-}
-
-void
-subseg_set (secptr, subseg)
- segT secptr;
- subsegT subseg;
-{
- if (! (secptr == now_seg && subseg == now_subseg))
- subseg_set_rest (secptr, subseg);
- mri_common_symbol = NULL;
-}
-
-#ifndef obj_sec_sym_ok_for_reloc
-#define obj_sec_sym_ok_for_reloc(SEC) 0
-#endif
-
-/* Get the gas information we are storing for a section. */
-
-segment_info_type *
-seg_info (sec)
- segT sec;
-{
- if (sec == bfd_abs_section_ptr)
- return abs_seg_info;
- else if (sec == bfd_und_section_ptr)
- return und_seg_info;
- else
- return (segment_info_type *) bfd_get_section_userdata (stdoutput, sec);
-}
-
-symbolS *
-section_symbol (sec)
- segT sec;
-{
- segment_info_type *seginfo = seg_info (sec);
- symbolS *s;
-
- if (seginfo == 0)
- abort ();
- if (seginfo->sym)
- return seginfo->sym;
-
-#ifndef EMIT_SECTION_SYMBOLS
-#define EMIT_SECTION_SYMBOLS 1
-#endif
-
- if (! EMIT_SECTION_SYMBOLS
-#ifdef BFD_ASSEMBLER
- || symbol_table_frozen
-#endif
- )
- {
- /* Here we know it won't be going into the symbol table. */
- s = symbol_create (sec->name, sec, 0, &zero_address_frag);
- }
- else
- {
- s = symbol_find_base (sec->name, 0);
- if (s == NULL)
- s = symbol_new (sec->name, sec, 0, &zero_address_frag);
- else
- {
- if (S_GET_SEGMENT (s) == undefined_section)
- {
- S_SET_SEGMENT (s, sec);
- s->sy_frag = &zero_address_frag;
- }
- }
- }
-
- S_CLEAR_EXTERNAL (s);
-
- /* Use the BFD section symbol, if possible. */
- if (obj_sec_sym_ok_for_reloc (sec))
- s->bsym = sec->symbol;
-
- seginfo->sym = s;
- return s;
-}
-
-#endif /* BFD_ASSEMBLER */
-
-void
-subsegs_print_statistics (file)
- FILE *file;
-{
- frchainS *frchp;
- fprintf (file, "frag chains:\n");
- for (frchp = frchain_root; frchp; frchp = frchp->frch_next)
- {
- int count = 0;
- fragS *fragp;
-
- /* If frch_subseg is non-zero, it's probably been chained onto
- the end of a previous subsection. Don't count it again. */
- if (frchp->frch_subseg != 0)
- continue;
-
- /* Skip gas-internal sections. */
- if (segment_name (frchp->frch_seg)[0] == '*')
- continue;
-
- for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next)
- {
-#if 0
- switch (fragp->fr_type)
- {
- case rs_fill:
- fprintf (file, "f"); break;
- case rs_align:
- fprintf (file, "a"); break;
- case rs_align_code:
- fprintf (file, "c"); break;
- case rs_org:
- fprintf (file, "o"); break;
- case rs_machine_dependent:
- fprintf (file, "m"); break;
- case rs_space:
- fprintf (file, "s"); break;
- case 0:
- fprintf (file, "0"); break;
- default:
- fprintf (file, "?"); break;
- }
-#endif
- count++;
- }
- fprintf (file, "\n");
- fprintf (file, "\t%p %-10s\t%10d frags\n", frchp,
- segment_name (frchp->frch_seg), count);
- }
-}
-
-/* end of subsegs.c */