#include "as.h"
#include "subsegs.h"
#include "obstack.h"
extern fragS zero_address_frag;
extern fragS bss_address_frag;
void
frag_init (void)
{
zero_address_frag.fr_type = rs_fill;
bss_address_frag.fr_type = rs_fill;
}
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;
}
}
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;
}
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;
frchain_now->frch_obstack.chunk_size = 2 * nchars + 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);
}
void
frag_new (int old_frags_var_max_size
)
{
fragS *former_last_fragP;
frchainS *frchP;
assert (frchain_now->frch_last == frag_now);
frag_now->fr_fix = frag_now_fix_octets () - old_frags_var_max_size;
assert (frag_now->fr_type != 0);
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);
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;
}
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);
}
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);
}
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);
}
void
frag_wane (register fragS *fragP)
{
fragP->fr_type = rs_fill;
fragP->fr_offset = 0;
fragP->fr_var = 0;
}
int
frag_room (void)
{
return obstack_room (&frchain_now->frch_obstack);
}
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;
}
}
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);
}
#ifndef NOP_OPCODE
#define NOP_OPCODE 0x00
#endif
#ifndef MAX_MEM_FOR_RS_ALIGN_CODE
# 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);
}