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-rw-r--r--binutils-2.17/gas/frags.c438
1 files changed, 0 insertions, 438 deletions
diff --git a/binutils-2.17/gas/frags.c b/binutils-2.17/gas/frags.c
deleted file mode 100644
index b08ef502..00000000
--- a/binutils-2.17/gas/frags.c
+++ /dev/null
@@ -1,438 +0,0 @@
-/* frags.c - manage frags -
- Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2003, 2004, 2005, 2006
- 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, 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
-
-#include "as.h"
-#include "subsegs.h"
-#include "obstack.h"
-
-extern fragS zero_address_frag;
-extern fragS bss_address_frag;
-
-/* Initialization for frag routines. */
-
-void
-frag_init (void)
-{
- zero_address_frag.fr_type = rs_fill;
- bss_address_frag.fr_type = rs_fill;
-}
-
-/* Check that we're not trying to assemble into a section that can't
- allocate frags (currently, this is only possible in the absolute
- section), or into an mri common. */
-
-static void
-frag_alloc_check (const struct obstack *ob)
-{
- if (ob->chunk_size == 0)
- {
- as_bad (_("attempt to allocate data in absolute section"));
- subseg_set (text_section, 0);
- }
-
- if (mri_common_symbol != NULL)
- {
- as_bad (_("attempt to allocate data in common section"));
- mri_common_symbol = NULL;
- }
-}
-
-/* Allocate a frag on the specified obstack.
- Call this routine from everywhere else, so that all the weird alignment
- hackery can be done in just one place. */
-
-fragS *
-frag_alloc (struct obstack *ob)
-{
- fragS *ptr;
- int oalign;
-
- (void) obstack_alloc (ob, 0);
- oalign = obstack_alignment_mask (ob);
- obstack_alignment_mask (ob) = 0;
- ptr = (fragS *) obstack_alloc (ob, SIZEOF_STRUCT_FRAG);
- obstack_alignment_mask (ob) = oalign;
- memset (ptr, 0, SIZEOF_STRUCT_FRAG);
- return ptr;
-}
-
-/* Try to augment current frag by nchars chars.
- If there is no room, close of the current frag with a ".fill 0"
- and begin a new frag. Unless the new frag has nchars chars available
- do not return. Do not set up any fields of *now_frag. */
-
-void
-frag_grow (unsigned int nchars)
-{
- if (obstack_room (&frchain_now->frch_obstack) < nchars)
- {
- unsigned int n;
- long oldc;
-
- frag_wane (frag_now);
- frag_new (0);
- oldc = frchain_now->frch_obstack.chunk_size;
- /* Try to allocate a bit more than needed right now. But don't do
- this if we would waste too much memory. Especially necessary
- for extremely big (like 2GB initialized) frags. */
- if (nchars < 0x10000)
- frchain_now->frch_obstack.chunk_size = 2 * nchars;
- else
- frchain_now->frch_obstack.chunk_size = nchars + 0x10000;
- frchain_now->frch_obstack.chunk_size += SIZEOF_STRUCT_FRAG;
- if (frchain_now->frch_obstack.chunk_size > 0)
- while ((n = obstack_room (&frchain_now->frch_obstack)) < nchars
- && (unsigned long) frchain_now->frch_obstack.chunk_size > nchars)
- {
- frag_wane (frag_now);
- frag_new (0);
- }
- frchain_now->frch_obstack.chunk_size = oldc;
- }
- if (obstack_room (&frchain_now->frch_obstack) < nchars)
- as_fatal (_("can't extend frag %u chars"), nchars);
-}
-
-/* Call this to close off a completed frag, and start up a new (empty)
- frag, in the same subsegment as the old frag.
- [frchain_now remains the same but frag_now is updated.]
- Because this calculates the correct value of fr_fix by
- looking at the obstack 'frags', it needs to know how many
- characters at the end of the old frag belong to the maximal
- variable part; The rest must belong to fr_fix.
- It doesn't actually set up the old frag's fr_var. You may have
- set fr_var == 1, but allocated 10 chars to the end of the frag;
- In this case you pass old_frags_var_max_size == 10.
- In fact, you may use fr_var for something totally unrelated to the
- size of the variable part of the frag; None of the generic frag
- handling code makes use of fr_var.
-
- Make a new frag, initialising some components. Link new frag at end
- of frchain_now. */
-
-void
-frag_new (int old_frags_var_max_size
- /* Number of chars (already allocated on obstack frags) in
- variable_length part of frag. */)
-{
- fragS *former_last_fragP;
- frchainS *frchP;
-
- assert (frchain_now->frch_last == frag_now);
-
- /* Fix up old frag's fr_fix. */
- frag_now->fr_fix = frag_now_fix_octets () - old_frags_var_max_size;
- /* Make sure its type is valid. */
- assert (frag_now->fr_type != 0);
-
- /* This will align the obstack so the next struct we allocate on it
- will begin at a correct boundary. */
- obstack_finish (&frchain_now->frch_obstack);
- frchP = frchain_now;
- know (frchP);
- former_last_fragP = frchP->frch_last;
- assert (former_last_fragP != 0);
- assert (former_last_fragP == frag_now);
- frag_now = frag_alloc (&frchP->frch_obstack);
-
- as_where (&frag_now->fr_file, &frag_now->fr_line);
-
- /* Generally, frag_now->points to an address rounded up to next
- alignment. However, characters will add to obstack frags
- IMMEDIATELY after the struct frag, even if they are not starting
- at an alignment address. */
- former_last_fragP->fr_next = frag_now;
- frchP->frch_last = frag_now;
-
-#ifndef NO_LISTING
- {
- extern struct list_info_struct *listing_tail;
- frag_now->line = listing_tail;
- }
-#endif
-
- assert (frchain_now->frch_last == frag_now);
-
- frag_now->fr_next = NULL;
-}
-
-/* Start a new frag unless we have n more chars of room in the current frag.
- Close off the old frag with a .fill 0.
-
- Return the address of the 1st char to write into. Advance
- frag_now_growth past the new chars. */
-
-char *
-frag_more (int nchars)
-{
- register char *retval;
-
- frag_alloc_check (&frchain_now->frch_obstack);
- frag_grow (nchars);
- retval = obstack_next_free (&frchain_now->frch_obstack);
- obstack_blank_fast (&frchain_now->frch_obstack, nchars);
- return (retval);
-}
-
-/* Start a new frag unless we have max_chars more chars of room in the
- current frag. Close off the old frag with a .fill 0.
-
- Set up a machine_dependent relaxable frag, then start a new frag.
- Return the address of the 1st char of the var part of the old frag
- to write into. */
-
-char *
-frag_var (relax_stateT type, int max_chars, int var, relax_substateT subtype,
- symbolS *symbol, offsetT offset, char *opcode)
-{
- register char *retval;
-
- frag_grow (max_chars);
- retval = obstack_next_free (&frchain_now->frch_obstack);
- obstack_blank_fast (&frchain_now->frch_obstack, max_chars);
- frag_now->fr_var = var;
- frag_now->fr_type = type;
- frag_now->fr_subtype = subtype;
- frag_now->fr_symbol = symbol;
- frag_now->fr_offset = offset;
- frag_now->fr_opcode = opcode;
-#ifdef USING_CGEN
- frag_now->fr_cgen.insn = 0;
- frag_now->fr_cgen.opindex = 0;
- frag_now->fr_cgen.opinfo = 0;
-#endif
-#ifdef TC_FRAG_INIT
- TC_FRAG_INIT (frag_now);
-#endif
- as_where (&frag_now->fr_file, &frag_now->fr_line);
- frag_new (max_chars);
- return (retval);
-}
-
-/* OVE: This variant of frag_var assumes that space for the tail has been
- allocated by caller.
- No call to frag_grow is done. */
-
-char *
-frag_variant (relax_stateT type, int max_chars, int var,
- relax_substateT subtype, symbolS *symbol, offsetT offset,
- char *opcode)
-{
- register char *retval;
-
- retval = obstack_next_free (&frchain_now->frch_obstack);
- frag_now->fr_var = var;
- frag_now->fr_type = type;
- frag_now->fr_subtype = subtype;
- frag_now->fr_symbol = symbol;
- frag_now->fr_offset = offset;
- frag_now->fr_opcode = opcode;
-#ifdef USING_CGEN
- frag_now->fr_cgen.insn = 0;
- frag_now->fr_cgen.opindex = 0;
- frag_now->fr_cgen.opinfo = 0;
-#endif
-#ifdef TC_FRAG_INIT
- TC_FRAG_INIT (frag_now);
-#endif
- as_where (&frag_now->fr_file, &frag_now->fr_line);
- frag_new (max_chars);
- return (retval);
-}
-
-/* Reduce the variable end of a frag to a harmless state. */
-
-void
-frag_wane (register fragS *fragP)
-{
- fragP->fr_type = rs_fill;
- fragP->fr_offset = 0;
- fragP->fr_var = 0;
-}
-
-/* Return the number of bytes by which the current frag can be grown. */
-
-int
-frag_room (void)
-{
- return obstack_room (&frchain_now->frch_obstack);
-}
-
-/* Make an alignment frag. The size of this frag will be adjusted to
- force the next frag to have the appropriate alignment. ALIGNMENT
- is the power of two to which to align. FILL_CHARACTER is the
- character to use to fill in any bytes which are skipped. MAX is
- the maximum number of characters to skip when doing the alignment,
- or 0 if there is no maximum. */
-
-void
-frag_align (int alignment, int fill_character, int max)
-{
- if (now_seg == absolute_section)
- {
- addressT new_off;
- addressT mask;
-
- mask = (~(addressT) 0) << alignment;
- new_off = (abs_section_offset + ~mask) & mask;
- if (max == 0 || new_off - abs_section_offset <= (addressT) max)
- abs_section_offset = new_off;
- }
- else
- {
- char *p;
-
- p = frag_var (rs_align, 1, 1, (relax_substateT) max,
- (symbolS *) 0, (offsetT) alignment, (char *) 0);
- *p = fill_character;
- }
-}
-
-/* Make an alignment frag like frag_align, but fill with a repeating
- pattern rather than a single byte. ALIGNMENT is the power of two
- to which to align. FILL_PATTERN is the fill pattern to repeat in
- the bytes which are skipped. N_FILL is the number of bytes in
- FILL_PATTERN. MAX is the maximum number of characters to skip when
- doing the alignment, or 0 if there is no maximum. */
-
-void
-frag_align_pattern (int alignment, const char *fill_pattern,
- int n_fill, int max)
-{
- char *p;
-
- p = frag_var (rs_align, n_fill, n_fill, (relax_substateT) max,
- (symbolS *) 0, (offsetT) alignment, (char *) 0);
- memcpy (p, fill_pattern, n_fill);
-}
-
-/* The NOP_OPCODE is for the alignment fill value. Fill it with a nop
- instruction so that the disassembler does not choke on it. */
-#ifndef NOP_OPCODE
-#define NOP_OPCODE 0x00
-#endif
-
-/* Use this to restrict the amount of memory allocated for representing
- the alignment code. Needs to be large enough to hold any fixed sized
- prologue plus the replicating portion. */
-#ifndef MAX_MEM_FOR_RS_ALIGN_CODE
- /* Assume that if HANDLE_ALIGN is not defined then no special action
- is required to code fill, which means that we get just repeat the
- one NOP_OPCODE byte. */
-# ifndef HANDLE_ALIGN
-# define MAX_MEM_FOR_RS_ALIGN_CODE 1
-# else
-# define MAX_MEM_FOR_RS_ALIGN_CODE ((1 << alignment) - 1)
-# endif
-#endif
-
-void
-frag_align_code (int alignment, int max)
-{
- char *p;
-
- p = frag_var (rs_align_code, MAX_MEM_FOR_RS_ALIGN_CODE, 1,
- (relax_substateT) max, (symbolS *) 0,
- (offsetT) alignment, (char *) 0);
- *p = NOP_OPCODE;
-}
-
-addressT
-frag_now_fix_octets (void)
-{
- if (now_seg == absolute_section)
- return abs_section_offset;
-
- return ((char *) obstack_next_free (&frchain_now->frch_obstack)
- - frag_now->fr_literal);
-}
-
-addressT
-frag_now_fix (void)
-{
- return frag_now_fix_octets () / OCTETS_PER_BYTE;
-}
-
-void
-frag_append_1_char (int datum)
-{
- frag_alloc_check (&frchain_now->frch_obstack);
- if (obstack_room (&frchain_now->frch_obstack) <= 1)
- {
- frag_wane (frag_now);
- frag_new (0);
- }
- obstack_1grow (&frchain_now->frch_obstack, datum);
-}
-
-/* Return TRUE if FRAG1 and FRAG2 have a fixed relationship between
- their start addresses. Set OFFSET to the difference in address
- not already accounted for in the frag FR_ADDRESS. */
-
-bfd_boolean
-frag_offset_fixed_p (fragS *frag1, fragS *frag2, bfd_vma *offset)
-{
- fragS *frag;
- bfd_vma off;
-
- /* Start with offset initialised to difference between the two frags.
- Prior to assigning frag addresses this will be zero. */
- off = frag1->fr_address - frag2->fr_address;
- if (frag1 == frag2)
- {
- *offset = off;
- return TRUE;
- }
-
- /* Maybe frag2 is after frag1. */
- frag = frag1;
- while (frag->fr_type == rs_fill)
- {
- off += frag->fr_fix + frag->fr_offset * frag->fr_var;
- frag = frag->fr_next;
- if (frag == NULL)
- break;
- if (frag == frag2)
- {
- *offset = off;
- return TRUE;
- }
- }
-
- /* Maybe frag1 is after frag2. */
- off = frag1->fr_address - frag2->fr_address;
- frag = frag2;
- while (frag->fr_type == rs_fill)
- {
- off -= frag->fr_fix + frag->fr_offset * frag->fr_var;
- frag = frag->fr_next;
- if (frag == NULL)
- break;
- if (frag == frag1)
- {
- *offset = off;
- return TRUE;
- }
- }
-
- return FALSE;
-}
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