/* subsegs.c - subsegments -
Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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. */
/* Segments & sub-segments. */
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 void subseg_set_rest (segT, subsegT);
static fragS dummy_frag;
static frchainS absolute_frchain;
\f
void
-subsegs_begin ()
+subsegs_begin (void)
{
- /* 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;
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;
}
* segment context correct.
*/
void
-subseg_change (seg, subseg)
- register segT seg;
- register int subseg;
+subseg_change (register segT seg, register int subseg)
{
+ segment_info_type *seginfo;
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
+ seginfo = (segment_info_type *) bfd_get_section_userdata (stdoutput, seg);
+ if (! seginfo)
{
- know (seg == SEG_BSS);
- seg_fix_rootP = &bss_fix_root;
- seg_fix_tailP = &bss_fix_tail;
+ 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);
}
-
-#endif
-#endif
}
\f
static void
-subseg_set_rest (seg, subseg)
- segT seg;
- subsegT subseg;
+subseg_set_rest (segT seg, subsegT subseg)
{
register frchainS *frcP; /* crawl frchain chain */
register frchainS **lastPP; /* address of last pointer */
/*
* This should be the only code that creates a frchainS.
*/
+ segment_info_type *seginfo;
+
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;
*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
+ seginfo = seg_info (seg);
+ if (seginfo && seginfo->frchainP == frcP)
+ seginfo->frchainP = newP;
frcP = newP;
}
* 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;
+subseg_get (const char *segname, int force_new)
{
segT secptr;
segment_info_type *seginfo;
else
secptr = bfd_make_section_anyway (stdoutput, segname);
+#ifdef obj_sec_set_private_data
+ obj_sec_set_private_data (stdoutput, secptr);
+#endif
+
seginfo = seg_info (secptr);
if (! seginfo)
{
/* Check whether output_section is set first because secptr may
- be bfd_abs_section_ptr. */
+ be bfd_abs_section_ptr. */
if (secptr->output_section != secptr)
secptr->output_section = secptr;
seginfo = (segment_info_type *) xmalloc (sizeof (*seginfo));
}
segT
-subseg_new (segname, subseg)
- const char *segname;
- subsegT subseg;
+subseg_new (const char *segname, subsegT subseg)
{
segT secptr;
segment_info_type *seginfo;
/* 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;
+subseg_force_new (const char *segname, subsegT subseg)
{
segT secptr;
segment_info_type *seginfo;
}
void
-subseg_set (secptr, subseg)
- segT secptr;
- subsegT subseg;
+subseg_set (segT secptr, subsegT subseg)
{
if (! (secptr == now_seg && subseg == now_subseg))
subseg_set_rest (secptr, subseg);
/* Get the gas information we are storing for a section. */
segment_info_type *
-seg_info (sec)
- segT sec;
+seg_info (segT sec)
{
if (sec == bfd_abs_section_ptr)
return abs_seg_info;
}
symbolS *
-section_symbol (sec)
- segT sec;
+section_symbol (segT sec)
{
segment_info_type *seginfo = seg_info (sec);
symbolS *s;
#define EMIT_SECTION_SYMBOLS 1
#endif
- if (! EMIT_SECTION_SYMBOLS
-#ifdef BFD_ASSEMBLER
- || symbol_table_frozen
-#endif
- )
+ if (! EMIT_SECTION_SYMBOLS || symbol_table_frozen)
{
/* Here we know it won't be going into the symbol table. */
- s = symbol_create (sec->name, sec, 0, &zero_address_frag);
+ s = symbol_create (sec->symbol->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
+ 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)
{
- if (S_GET_SEGMENT (s) == undefined_section)
- {
- S_SET_SEGMENT (s, sec);
- symbol_set_frag (s, &zero_address_frag);
- }
+ S_SET_SEGMENT (s, sec);
+ symbol_set_frag (s, &zero_address_frag);
}
}
/* 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;
}
-#endif /* BFD_ASSEMBLER */
-
/* Return whether the specified segment is thought to hold text. */
-#ifndef BFD_ASSEMBLER
-const char * const nontext_section_names[] = {
- ".eh_frame",
- ".gcc_except_table",
-#ifdef OBJ_COFF
-#ifndef COFF_LONG_SECTION_NAMES
- ".eh_fram",
- ".gcc_exc",
-#endif
-#endif
- NULL
-};
-#endif /* ! BFD_ASSEMBLER */
-
int
-subseg_text_p (sec)
- segT sec;
+subseg_text_p (segT sec)
{
-#ifdef BFD_ASSEMBLER
return (bfd_get_section_flags (stdoutput, sec) & SEC_CODE) != 0;
-#else /* ! BFD_ASSEMBLER */
- const char * const *p;
+}
- if (sec == data_section || sec == bss_section || sec == absolute_section)
- return 0;
+/* Return non zero if SEC has at least one byte of data. It is
+ possible that we'll return zero even on a non-empty section because
+ we don't know all the fragment types, and it is possible that an
+ fr_fix == 0 one still contributes data. Think of this as
+ seg_definitely_not_empty_p. */
- for (p = nontext_section_names; *p != NULL; ++p)
- {
- if (strcmp (segment_name (sec), *p) == 0)
- return 0;
+int
+seg_not_empty_p (segT sec ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+ frchainS *chain;
+ fragS *frag;
-#ifdef obj_segment_name
- if (strcmp (obj_segment_name (sec), *p) == 0)
- return 0;
-#endif
+ 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 1;
-
-#endif /* ! BFD_ASSEMBLER */
+ return 0;
}
void
-subsegs_print_statistics (file)
- FILE *file;
+subsegs_print_statistics (FILE *file)
{
frchainS *frchp;
fprintf (file, "frag chains:\n");
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,
+ fprintf (file, "\t%p %-10s\t%10d frags\n", (void *) frchp,
segment_name (frchp->frch_seg), count);
}
}
projects / deliverable / binutils-gdb.git / blobdiff