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cell-binutils  2.17cvs20070401
Defines | Functions | Variables
subsegs.c File Reference
#include "as.h"
#include "subsegs.h"
#include "obstack.h"

Go to the source code of this file.

Defines

#define obj_sec_sym_ok_for_reloc(SEC)   0
#define EMIT_SECTION_SYMBOLS   1

Functions

void subsegs_begin (void)
void subseg_change (register segT seg, register int subseg)
static void subseg_set_rest (segT seg, subsegT subseg)
segT subseg_get (const char *segname, int force_new)
segT subseg_new (const char *segname, subsegT subseg)
segT subseg_force_new (const char *segname, subsegT subseg)
void subseg_set (segT secptr, subsegT subseg)
symbolS * section_symbol (segT sec)
int subseg_text_p (segT sec)
int seg_not_empty_p (segT sec ATTRIBUTE_UNUSED)
void subsegs_print_statistics (FILE *file)

Variables

frchainS * frchain_now
static struct obstack
static fragS dummy_frag

Define Documentation

#define EMIT_SECTION_SYMBOLS   1
#define obj_sec_sym_ok_for_reloc (   SEC)    0

Definition at line 208 of file subsegs.c.


Function Documentation

symbolS* section_symbol ( segT  sec)

Definition at line 212 of file subsegs.c.

{
  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 || symbol_table_frozen)
    {
      /* Here we know it won't be going into the symbol table.  */
      s = symbol_create (sec->symbol->name, sec, 0, &zero_address_frag);
    }
  else
    {
      segT seg;
      s = symbol_find (sec->symbol->name);
      /* We have to make sure it is the right symbol when we
        have multiple sections with the same section name.  */
      if (s == NULL
         || ((seg = S_GET_SEGMENT (s)) != sec
             && seg != undefined_section))
       s = symbol_new (sec->symbol->name, sec, 0, &zero_address_frag);
      else if (seg == undefined_section)
       {
         S_SET_SEGMENT (s, sec);
         symbol_set_frag (s, &zero_address_frag);
       }
    }

  S_CLEAR_EXTERNAL (s);

  /* Use the BFD section symbol, if possible.  */
  if (obj_sec_sym_ok_for_reloc (sec))
    symbol_set_bfdsym (s, sec->symbol);
  else
    symbol_get_bfdsym (s)->flags |= BSF_SECTION_SYM;

  seginfo->sym = s;
  return s;
}

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int seg_not_empty_p ( segT sec  ATTRIBUTE_UNUSED)

Definition at line 275 of file subsegs.c.

{
  segment_info_type *seginfo = seg_info (sec);
  frchainS *chain;
  fragS *frag;

  if (!seginfo)
    return 0;
  
  for (chain = seginfo->frchainP; chain; chain = chain->frch_next)
    {
      for (frag = chain->frch_root; frag; frag = frag->fr_next)
       if (frag->fr_fix)
         return 1;
      if (obstack_next_free (&chain->frch_obstack)
         != chain->frch_last->fr_literal)
       return 1;
    }
  return 0;
}

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void subseg_change ( register segT  seg,
register int  subseg 
)

Definition at line 60 of file subsegs.c.

{
  segment_info_type *seginfo = seg_info (seg);
  now_seg = seg;
  now_subseg = subseg;

  if (! seginfo)
    {
      seginfo = xcalloc (1, sizeof (*seginfo));
      seginfo->bfd_section = seg;
      bfd_set_section_userdata (stdoutput, seg, seginfo);
    }
}

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segT subseg_force_new ( const char *  segname,
subsegT  subseg 
)

Definition at line 190 of file subsegs.c.

{
  segT secptr;

  secptr = subseg_get (segname, 1);
  subseg_set_rest (secptr, subseg);
  return secptr;
}

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segT subseg_get ( const char *  segname,
int  force_new 
)

Definition at line 147 of file subsegs.c.

{
  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)
    {
      secptr->output_section = secptr;
      seginfo = xcalloc (1, sizeof (*seginfo));
      seginfo->bfd_section = secptr;
      bfd_set_section_userdata (stdoutput, secptr, seginfo);
    }
  return secptr;
}

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segT subseg_new ( const char *  segname,
subsegT  subseg 
)

Definition at line 178 of file subsegs.c.

{
  segT secptr;

  secptr = subseg_get (segname, 0);
  subseg_set_rest (secptr, subseg);
  return secptr;
}

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void subseg_set ( segT  secptr,
subsegT  subseg 
)

Definition at line 200 of file subsegs.c.

{
  if (! (secptr == now_seg && subseg == now_subseg))
    subseg_set_rest (secptr, subseg);
  mri_common_symbol = NULL;
}

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static void subseg_set_rest ( segT  seg,
subsegT  subseg 
) [static]

Definition at line 75 of file subsegs.c.

{
  frchainS *frcP;           /* crawl frchain chain */
  frchainS **lastPP;        /* address of last pointer */
  frchainS *newP;           /* address of new frchain */
  segment_info_type *seginfo;

  mri_common_symbol = NULL;

  if (frag_now && frchain_now)
    frchain_now->frch_frag_now = frag_now;

  assert (frchain_now == 0
         || frchain_now->frch_last == frag_now);

  subseg_change (seg, (int) subseg);

  seginfo = seg_info (seg);

  /* Attempt to find or make a frchain for that subsection.
     We keep the list sorted by subsection number.  */
  for (frcP = *(lastPP = &seginfo->frchainP);
       frcP != NULL;
       frcP = *(lastPP = &frcP->frch_next))
    if (frcP->frch_subseg >= subseg)
      break;

  if (frcP == NULL || frcP->frch_subseg != subseg)
    {
      /* This should be the only code that creates a frchainS.  */

      newP = obstack_alloc (&frchains, sizeof (frchainS));
      newP->frch_subseg = subseg;
      newP->fix_root = NULL;
      newP->fix_tail = NULL;
      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_cfi_data = NULL;

      newP->frch_root = newP->frch_last = newP->frch_frag_now;

      *lastPP = newP;
      newP->frch_next = frcP;
      frcP = newP;
    }

  frchain_now = frcP;
  frag_now = frcP->frch_frag_now;

  assert (frchain_now->frch_last == frag_now);
}

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Definition at line 263 of file subsegs.c.

{
  return (bfd_get_section_flags (stdoutput, sec) & SEC_CODE) != 0;
}

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void subsegs_begin ( void  )

Definition at line 38 of file subsegs.c.

{
  obstack_begin (&frchains, chunksize);
#if __GNUC__ >= 2
  obstack_alignment_mask (&frchains) = __alignof__ (frchainS) - 1;
#endif

  frchain_now = NULL;              /* Warn new_subseg() that we are booting.  */
  frag_now = &dummy_frag;
}

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void subsegs_print_statistics ( FILE *  file)

Definition at line 297 of file subsegs.c.

{
  frchainS *frchp;
  asection *s;

  fprintf (file, "frag chains:\n");
  for (s = stdoutput->sections; s; s = s->next)
    {
      segment_info_type *seginfo;

      /* Skip gas-internal sections.  */
      if (segment_name (s)[0] == '*')
       continue;

      seginfo = seg_info (s);
      if (!seginfo)
       continue;

      for (frchp = seginfo->frchainP; frchp; frchp = frchp->frch_next)
       {
         int count = 0;
         fragS *fragp;

         for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next)
           count++;

         fprintf (file, "\n");
         fprintf (file, "\t%p %-10s\t%10d frags\n", (void *) frchp,
                 segment_name (s), count);
       }
    }
}

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Variable Documentation

fragS dummy_frag [static]

Definition at line 34 of file subsegs.c.

frchainS* frchain_now

Definition at line 30 of file subsegs.c.

struct obstack [static]

Definition at line 32 of file subsegs.c.