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freebsd-dev/gnu/usr.bin/as/config/obj-coff.c

1979 lines
60 KiB
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/* coff object file format
Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
This file is part of GAS.
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "as.h"
#include "obstack.h"
lineno* lineno_rootP;
const short seg_N_TYPE[] = { /* in: segT out: N_TYPE bits */
C_ABS_SECTION,
C_TEXT_SECTION,
C_DATA_SECTION,
C_BSS_SECTION,
C_UNDEF_SECTION, /* SEG_UNKNOWN */
C_UNDEF_SECTION, /* SEG_ABSENT */
C_UNDEF_SECTION, /* SEG_PASS1 */
C_UNDEF_SECTION, /* SEG_GOOF */
C_UNDEF_SECTION, /* SEG_BIG */
C_UNDEF_SECTION, /* SEG_DIFFERENCE */
C_DEBUG_SECTION, /* SEG_DEBUG */
C_NTV_SECTION, /* SEG_NTV */
C_PTV_SECTION, /* SEG_PTV */
C_REGISTER_SECTION, /* SEG_REGISTER */
};
/* Add 4 to the real value to get the index and compensate the negatives */
const segT N_TYPE_seg[32] =
{
SEG_PTV, /* C_PTV_SECTION == -4 */
SEG_NTV, /* C_NTV_SECTION == -3 */
SEG_DEBUG, /* C_DEBUG_SECTION == -2 */
SEG_ABSOLUTE, /* C_ABS_SECTION == -1 */
SEG_UNKNOWN, /* C_UNDEF_SECTION == 0 */
SEG_TEXT, /* C_TEXT_SECTION == 1 */
SEG_DATA, /* C_DATA_SECTION == 2 */
SEG_BSS, /* C_BSS_SECTION == 3 */
SEG_REGISTER, /* C_REGISTER_SECTION == 4 */
SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,
SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,
SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF,SEG_GOOF
};
#if __STDC__ == 1
char *s_get_name(symbolS *s);
static symbolS *tag_find_or_make(char *name);
static symbolS* tag_find(char *name);
#ifdef BFD_HEADERS
static void obj_coff_section_header_append(char **where, struct internal_scnhdr *header);
#else
static void obj_coff_section_header_append(char **where, SCNHDR *header);
#endif
static void obj_coff_def(int what);
static void obj_coff_dim(void);
static void obj_coff_endef(void);
static void obj_coff_line(void);
static void obj_coff_ln(void);
static void obj_coff_scl(void);
static void obj_coff_size(void);
static void obj_coff_stab(int what);
static void obj_coff_tag(void);
static void obj_coff_type(void);
static void obj_coff_val(void);
static void tag_init(void);
static void tag_insert(char *name, symbolS *symbolP);
#else /* not __STDC__ */
char *s_get_name();
static symbolS *tag_find();
static symbolS *tag_find_or_make();
static void obj_coff_section_header_append();
static void obj_coff_def();
static void obj_coff_dim();
static void obj_coff_endef();
static void obj_coff_line();
static void obj_coff_ln();
static void obj_coff_scl();
static void obj_coff_size();
static void obj_coff_stab();
static void obj_coff_tag();
static void obj_coff_type();
static void obj_coff_val();
static void tag_init();
static void tag_insert();
#endif /* not __STDC__ */
static struct hash_control *tag_hash;
static symbolS *def_symbol_in_progress = NULL;
const pseudo_typeS obj_pseudo_table[] = {
#ifndef IGNORE_DEBUG
{ "def", obj_coff_def, 0 },
{ "dim", obj_coff_dim, 0 },
{ "endef", obj_coff_endef, 0 },
{ "line", obj_coff_line, 0 },
{ "ln", obj_coff_ln, 0 },
{ "scl", obj_coff_scl, 0 },
{ "size", obj_coff_size, 0 },
{ "tag", obj_coff_tag, 0 },
{ "type", obj_coff_type, 0 },
{ "val", obj_coff_val, 0 },
#else
{ "def", s_ignore, 0 },
{ "dim", s_ignore, 0 },
{ "endef", s_ignore, 0 },
{ "line", s_ignore, 0 },
{ "ln", s_ignore, 0 },
{ "scl", s_ignore, 0 },
{ "size", s_ignore, 0 },
{ "tag", s_ignore, 0 },
{ "type", s_ignore, 0 },
{ "val", s_ignore, 0 },
#endif /* ignore debug */
{ "ident", s_ignore, 0 }, /* we don't yet handle this. */
/* stabs aka a.out aka b.out directives for debug symbols.
Currently ignored silently. Except for .line at which
we guess from context. */
{ "desc", s_ignore, 0 }, /* def */
/* { "line", s_ignore, 0 }, */ /* source code line number */
{ "stabd", obj_coff_stab, 'd' }, /* stabs */
{ "stabn", obj_coff_stab, 'n' }, /* stabs */
{ "stabs", obj_coff_stab, 's' }, /* stabs */
/* stabs-in-coff (?) debug pseudos (ignored) */
{ "optim", s_ignore, 0 }, /* For sun386i cc (?) */
/* other stuff */
{ "ABORT", s_abort, 0 },
{ NULL} /* end sentinel */
}; /* obj_pseudo_table */
/* obj dependant output values */
#ifdef BFD_HEADERS
static struct internal_scnhdr bss_section_header;
struct internal_scnhdr data_section_header;
struct internal_scnhdr text_section_header;
#else
static SCNHDR bss_section_header;
SCNHDR data_section_header;
SCNHDR text_section_header;
#endif
/* Relocation. */
static int reloc_compare(p1, p2)
#ifdef BFD_HEADERS
struct internal_reloc *p1, *p2;
#else
RELOC *p1, *p2;
#endif
{
return (int)(p1->r_vaddr - p2->r_vaddr);
}
/*
* emit_relocations()
*
* Crawl along a fixS chain. Emit the segment's relocations.
*/
void obj_emit_relocations(where, fixP, segment_address_in_file)
char **where;
fixS *fixP; /* Fixup chain for this segment. */
relax_addressT segment_address_in_file;
{
#ifdef BFD_HEADERS
struct internal_reloc *ri_table;
#else
RELOC *ri_table;
#endif
symbolS *symbolP;
int i, count;
fixS *p;
for (count = 0, p = fixP; p ; p = p->fx_next)
if (p->fx_addsy) count++;
if (!count)
return;
#ifdef BFD_HEADERS
ri_table = (struct internal_reloc *) calloc(sizeof(*ri_table),count);
#else
ri_table = (RELOC *) calloc(sizeof(*ri_table),count);
#endif
if (!ri_table)
as_fatal ("obj_emit_relocations: Could not malloc relocation table");
#ifdef TC_I960
callj_table = (char *)malloc (sizeof(char)*count);
if (!callj_table)
as_fatal ("obj_emit_relocations: Could not malloc callj table");
#endif
for (i = 0; fixP; fixP = fixP->fx_next) {
if (symbolP = fixP->fx_addsy) {
#if defined(TC_M68K)
ri_table[i].r_type = (fixP->fx_pcrel ?
(fixP->fx_size == 1 ? R_PCRBYTE :
fixP->fx_size == 2 ? R_PCRWORD :
R_PCRLONG):
(fixP->fx_size == 1 ? R_RELBYTE :
fixP->fx_size == 2 ? R_RELWORD :
R_RELLONG));
#elif defined(TC_I386)
/* FIXME-SOON R_OFF8 & R_DIR16 are a vague guess, completly
untested. */
ri_table[i].r_type = (fixP->fx_pcrel ?
(fixP->fx_size == 1 ? R_PCRBYTE :
fixP->fx_size == 2 ? R_PCRWORD :
R_PCRLONG):
(fixP->fx_size == 1 ? R_OFF8 :
fixP->fx_size == 2 ? R_DIR16 :
R_DIR32));
#elif defined(TC_I960)
ri_table[i].r_type = (fixP->fx_pcrel
? R_IPRMED
: R_RELLONG);
callj_table[i] = fixP->fx_callj ? 1 : 0;
#elif defined(TC_A29K)
ri_table[i].r_type = tc_coff_fix2rtype(fixP);
#else
#error you lose
#endif /* TC_M68K || TC_I386 */
ri_table[i].r_vaddr = (fixP->fx_frag->fr_address
+ fixP->fx_where);
/* If symbol associated to relocation entry is a bss symbol
or undefined symbol just remember the index of the symbol.
Otherwise store the index of the symbol describing the
section the symbol belong to. This heuristic speeds up ld.
*/
/* Local symbols can generate relocation information. In case
of structure return for instance. But they have no symbol
number because they won't be emitted in the final object.
In the case where they are in the BSS section, this leads
to an incorrect r_symndx.
Under bsd the loader do not care if the symbol reference
is incorrect. But the SYS V ld complains about this. To
avoid this we associate the symbol to the associated
section, *even* if it is the BSS section. */
/* If someone can tell me why the other symbols of the bss
section are not associated with the .bss section entry,
I'd be gratefull. I guess that it has to do with the special
nature of the .bss section. Or maybe this is because the
bss symbols are declared in the common section and can
be resized later. Can it break code some where ? */
ri_table[i].r_symndx = (S_GET_SEGMENT(symbolP) == SEG_TEXT
? dot_text_symbol->sy_number
: (S_GET_SEGMENT(symbolP) == SEG_DATA
? dot_data_symbol->sy_number
: ((SF_GET_LOCAL(symbolP)
? dot_bss_symbol->sy_number
: symbolP->sy_number)))); /* bss or undefined */
/* md_ri_to_chars((char *) &ri, ri); */ /* Last step : write md f */
i++;
} /* if there's a symbol */
} /* for each fixP */
/*
* AIX ld prefer to have the reloc table with r_vaddr sorted.
* But sorting it should not hurt any other ld.
*/
qsort (ri_table, count, sizeof(*ri_table), reloc_compare);
for (i = 0; i < count; i++)
{
#ifdef BFD_HEADERS
*where += bfd_coff_swap_reloc_out(stdoutput, &ri_table[i], *where);
# ifdef TC_A29K
/* The 29k has a special kludge for the high 16 bit reloc.
Two relocations are emmited, R_IHIHALF, and R_IHCONST.
The second one doesn't contain a symbol, but uses the
value for offset */
if (ri_table[i].r_type == R_IHIHALF)
{
/* now emit the second bit */
ri_table[i].r_type = R_IHCONST;
ri_table[i].r_symndx = fixP->fx_addnumber;
*where += bfd_coff_swap_reloc_out(stdoutput, &ri_table[i],
*where);
}
# endif /* TC_A29K */
#else /* not BFD_HEADERS */
append(where, (char *) &ri_table[i], RELSZ);
#endif /* not BFD_HEADERS */
#ifdef TC_I960
if (callj_table[i])
{
ri_table[i].r_type = R_OPTCALL;
# ifdef BFD_HEADERS
*where += bfd_coff_swap_reloc_out(stdoutput, &ri_table[i],
*where);
# else
append(where, (char *) &ri_table[i], (unsigned long)RELSZ);
# endif /* BFD_HEADERS */
} /* if it's a callj, do it again for the opcode */
#endif /* TC_I960 */
}
free (ri_table);
#ifdef TC_I960
free (callj_table);
#endif
return;
} /* obj_emit_relocations() */
/* Coff file generation & utilities */
#ifdef BFD_HEADERS
void obj_header_append(where, headers)
char **where;
object_headers *headers;
{
tc_headers_hook(headers);
*where += bfd_coff_swap_filehdr_out(stdoutput, &(headers->filehdr), *where);
#ifndef OBJ_COFF_OMIT_OPTIONAL_HEADER
*where += bfd_coff_swap_aouthdr_out(stdoutput, &(headers->aouthdr), *where);
#endif
obj_coff_section_header_append(where, &text_section_header);
obj_coff_section_header_append(where, &data_section_header);
obj_coff_section_header_append(where, &bss_section_header);
}
#else
void obj_header_append(where, headers)
char **where;
object_headers *headers;
{
tc_headers_hook(headers);
#ifdef CROSS_COMPILE
/* Eventually swap bytes for cross compilation for file header */
md_number_to_chars(*where, headers->filehdr.f_magic, sizeof(headers->filehdr.f_magic));
*where += sizeof(headers->filehdr.f_magic);
md_number_to_chars(*where, headers->filehdr.f_nscns, sizeof(headers->filehdr.f_nscns));
*where += sizeof(headers->filehdr.f_nscns);
md_number_to_chars(*where, headers->filehdr.f_timdat, sizeof(headers->filehdr.f_timdat));
*where += sizeof(headers->filehdr.f_timdat);
md_number_to_chars(*where, headers->filehdr.f_symptr, sizeof(headers->filehdr.f_symptr));
*where += sizeof(headers->filehdr.f_symptr);
md_number_to_chars(*where, headers->filehdr.f_nsyms, sizeof(headers->filehdr.f_nsyms));
*where += sizeof(headers->filehdr.f_nsyms);
md_number_to_chars(*where, headers->filehdr.f_opthdr, sizeof(headers->filehdr.f_opthdr));
*where += sizeof(headers->filehdr.f_opthdr);
md_number_to_chars(*where, headers->filehdr.f_flags, sizeof(headers->filehdr.f_flags));
*where += sizeof(headers->filehdr.f_flags);
#ifndef OBJ_COFF_OMIT_OPTIONAL_HEADER
/* Eventually swap bytes for cross compilation for a.out header */
md_number_to_chars(*where, headers->aouthdr.magic, sizeof(headers->aouthdr.magic));
*where += sizeof(headers->aouthdr.magic);
md_number_to_chars(*where, headers->aouthdr.vstamp, sizeof(headers->aouthdr.vstamp));
*where += sizeof(headers->aouthdr.vstamp);
md_number_to_chars(*where, headers->aouthdr.tsize, sizeof(headers->aouthdr.tsize));
*where += sizeof(headers->aouthdr.tsize);
md_number_to_chars(*where, headers->aouthdr.dsize, sizeof(headers->aouthdr.dsize));
*where += sizeof(headers->aouthdr.dsize);
md_number_to_chars(*where, headers->aouthdr.bsize, sizeof(headers->aouthdr.bsize));
*where += sizeof(headers->aouthdr.bsize);
md_number_to_chars(*where, headers->aouthdr.entry, sizeof(headers->aouthdr.entry));
*where += sizeof(headers->aouthdr.entry);
md_number_to_chars(*where, headers->aouthdr.text_start, sizeof(headers->aouthdr.text_start));
*where += sizeof(headers->aouthdr.text_start);
md_number_to_chars(*where, headers->aouthdr.data_start, sizeof(headers->aouthdr.data_start));
*where += sizeof(headers->aouthdr.data_start);
md_number_to_chars(*where, headers->aouthdr.tagentries, sizeof(headers->aouthdr.tagentries));
*where += sizeof(headers->aouthdr.tagentries);
#endif /* OBJ_COFF_OMIT_OPTIONAL_HEADER */
#else /* CROSS_COMPILE */
append(where, (char *) &headers->filehdr, sizeof(headers->filehdr));
#ifndef OBJ_COFF_OMIT_OPTIONAL_HEADER
append(where, (char *) &headers->aouthdr, sizeof(headers->aouthdr));
#endif /* OBJ_COFF_OMIT_OPTIONAL_HEADER */
#endif /* CROSS_COMPILE */
/* Output the section headers */
obj_coff_section_header_append(where, &text_section_header);
obj_coff_section_header_append(where, &data_section_header);
obj_coff_section_header_append(where, &bss_section_header);
return;
} /* obj_header_append() */
#endif
void obj_symbol_to_chars(where, symbolP)
char **where;
symbolS *symbolP;
{
#ifdef BFD_HEADERS
unsigned int numaux = symbolP->sy_symbol.ost_entry.n_numaux;
unsigned int i;
if (S_GET_SEGMENT(symbolP) == SEG_REGISTER) {
S_SET_SEGMENT(symbolP, SEG_ABSOLUTE);
}
*where += bfd_coff_swap_sym_out(stdoutput, &symbolP->sy_symbol.ost_entry,
*where);
for (i = 0; i < numaux; i++)
{
*where += bfd_coff_swap_aux_out(stdoutput,
&symbolP->sy_symbol.ost_auxent[i],
S_GET_DATA_TYPE(symbolP),
S_GET_STORAGE_CLASS(symbolP),
*where);
}
#else /* BFD_HEADERS */
SYMENT *syment = &symbolP->sy_symbol.ost_entry;
int i;
char numaux = syment->n_numaux;
unsigned short type = S_GET_DATA_TYPE(symbolP);
#ifdef CROSS_COMPILE
md_number_to_chars(*where, syment->n_value, sizeof(syment->n_value));
*where += sizeof(syment->n_value);
md_number_to_chars(*where, syment->n_scnum, sizeof(syment->n_scnum));
*where += sizeof(syment->n_scnum);
md_number_to_chars(*where, 0, sizeof(short)); /* pad n_flags */
*where += sizeof(short);
md_number_to_chars(*where, syment->n_type, sizeof(syment->n_type));
*where += sizeof(syment->n_type);
md_number_to_chars(*where, syment->n_sclass, sizeof(syment->n_sclass));
*where += sizeof(syment->n_sclass);
md_number_to_chars(*where, syment->n_numaux, sizeof(syment->n_numaux));
*where += sizeof(syment->n_numaux);
#else /* CROSS_COMPILE */
append(where, (char *) syment, sizeof(*syment));
#endif /* CROSS_COMPILE */
/* Should do the following : if (.file entry) MD(..)... else if (static entry) MD(..) */
if (numaux > OBJ_COFF_MAX_AUXENTRIES) {
as_bad("Internal error? too many auxents for symbol");
} /* too many auxents */
for (i = 0; i < numaux; ++i) {
#ifdef CROSS_COMPILE
#if 0 /* This code has never been tested */
/* The most common case, x_sym entry. */
if ((SF_GET(symbolP) & (SF_FILE | SF_STATICS)) == 0) {
md_number_to_chars(*where, auxP->x_sym.x_tagndx, sizeof(auxP->x_sym.x_tagndx));
*where += sizeof(auxP->x_sym.x_tagndx);
if (ISFCN(type)) {
md_number_to_chars(*where, auxP->x_sym.x_misc.x_fsize, sizeof(auxP->x_sym.x_misc.x_fsize));
*where += sizeof(auxP->x_sym.x_misc.x_fsize);
} else {
md_number_to_chars(*where, auxP->x_sym.x_misc.x_lnno, sizeof(auxP->x_sym.x_misc.x_lnno));
*where += sizeof(auxP->x_sym.x_misc.x_lnno);
md_number_to_chars(*where, auxP->x_sym.x_misc.x_size, sizeof(auxP->x_sym.x_misc.x_size));
*where += sizeof(auxP->x_sym.x_misc.x_size);
}
if (ISARY(type)) {
register int index;
for (index = 0; index < DIMNUM; index++)
md_number_to_chars(*where, auxP->x_sym.x_fcnary.x_ary.x_dimen[index], sizeof(auxP->x_sym.x_fcnary.x_ary.x_dimen[index]));
*where += sizeof(auxP->x_sym.x_fcnary.x_ary.x_dimen[index]);
} else {
md_number_to_chars(*where, auxP->x_sym.x_fcnary.x_fcn.x_lnnoptr, sizeof(auxP->x_sym.x_fcnary.x_fcn.x_lnnoptr));
*where += sizeof(auxP->x_sym.x_fcnary.x_fcn.x_lnnoptr);
md_number_to_chars(*where, auxP->x_sym.x_fcnary.x_fcn.x_endndx, sizeof(auxP->x_sym.x_fcnary.x_fcn.x_endndx));
*where += sizeof(auxP->x_sym.x_fcnary.x_fcn.x_endndx);
}
md_number_to_chars(*where, auxP->x_sym.x_tvndx, sizeof(auxP->x_sym.x_tvndx));
*where += sizeof(auxP->x_sym.x_tvndx);
} else if (SF_GET_FILE(symbolP)) { /* .file */
;
} else if (SF_GET_STATICS(symbolP)) { /* .text, .data, .bss symbols */
md_number_to_chars(*where, auxP->x_scn.x_scnlen, sizeof(auxP->x_scn.x_scnlen));
*where += sizeof(auxP->x_scn.x_scnlen);
md_number_to_chars(*where, auxP->x_scn.x_nreloc, sizeof(auxP->x_scn.x_nreloc));
*where += sizeof(auxP->x_scn.x_nreloc);
md_number_to_chars(*where, auxP->x_scn.x_nlinno, sizeof(auxP->x_scn.x_nlinno));
*where += sizeof(auxP->x_scn.x_nlinno);
}
#endif /* 0 */
#else /* CROSS_COMPILE */
append(where, (char *) &symbolP->sy_symbol.ost_auxent[i], sizeof(symbolP->sy_symbol.ost_auxent[i]));
#endif /* CROSS_COMPILE */
}; /* for each aux in use */
#endif /* BFD_HEADERS */
return;
} /* obj_symbol_to_chars() */
#ifdef BFD_HEADERS
static void obj_coff_section_header_append(where, header)
char **where;
struct internal_scnhdr *header;
{
*where += bfd_coff_swap_scnhdr_out(stdoutput, header, *where);
}
#else
static void obj_coff_section_header_append(where, header)
char **where;
SCNHDR *header;
{
#ifdef CROSS_COMPILE
memcpy(*where, header->s_name, sizeof(header->s_name));
*where += sizeof(header->s_name);
md_number_to_chars(*where, header->s_paddr, sizeof(header->s_paddr));
*where += sizeof(header->s_paddr);
md_number_to_chars(*where, header->s_vaddr, sizeof(header->s_vaddr));
*where += sizeof(header->s_vaddr);
md_number_to_chars(*where, header->s_size, sizeof(header->s_size));
*where += sizeof(header->s_size);
md_number_to_chars(*where, header->s_scnptr, sizeof(header->s_scnptr));
*where += sizeof(header->s_scnptr);
md_number_to_chars(*where, header->s_relptr, sizeof(header->s_relptr));
*where += sizeof(header->s_relptr);
md_number_to_chars(*where, header->s_lnnoptr, sizeof(header->s_lnnoptr));
*where += sizeof(header->s_lnnoptr);
md_number_to_chars(*where, header->s_nreloc, sizeof(header->s_nreloc));
*where += sizeof(header->s_nreloc);
md_number_to_chars(*where, header->s_nlnno, sizeof(header->s_nlnno));
*where += sizeof(header->s_nlnno);
md_number_to_chars(*where, header->s_flags, sizeof(header->s_flags));
*where += sizeof(header->s_flags);
#ifdef TC_I960
md_number_to_chars(*where, header->s_align, sizeof(header->s_align));
*where += sizeof(header->s_align);
#endif /* TC_I960 */
#else /* CROSS_COMPILE */
append(where, (char *) header, sizeof(*header));
#endif /* CROSS_COMPILE */
return;
} /* obj_coff_section_header_append() */
#endif
void obj_emit_symbols(where, symbol_rootP)
char **where;
symbolS *symbol_rootP;
{
symbolS *symbolP;
/*
* Emit all symbols left in the symbol chain.
*/
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
/* Used to save the offset of the name. It is used to point
to the string in memory but must be a file offset. */
register char * temp;
tc_coff_symbol_emit_hook(symbolP);
temp = S_GET_NAME(symbolP);
if (SF_GET_STRING(symbolP)) {
S_SET_OFFSET(symbolP, symbolP->sy_name_offset);
S_SET_ZEROES(symbolP, 0);
} else {
memset(symbolP->sy_symbol.ost_entry.n_name, '\0', SYMNMLEN);
strncpy(symbolP->sy_symbol.ost_entry.n_name, temp, SYMNMLEN);
}
obj_symbol_to_chars(where, symbolP);
S_SET_NAME(symbolP,temp);
}
} /* obj_emit_symbols() */
/* Merge a debug symbol containing debug information into a normal symbol. */
void c_symbol_merge(debug, normal)
symbolS *debug;
symbolS *normal;
{
S_SET_DATA_TYPE(normal, S_GET_DATA_TYPE(debug));
S_SET_STORAGE_CLASS(normal, S_GET_STORAGE_CLASS(debug));
if (S_GET_NUMBER_AUXILIARY(debug) > S_GET_NUMBER_AUXILIARY(normal)) {
S_SET_NUMBER_AUXILIARY(normal, S_GET_NUMBER_AUXILIARY(debug));
} /* take the most we have */
if (S_GET_NUMBER_AUXILIARY(debug) > 0) {
memcpy((char*)&normal->sy_symbol.ost_auxent[0], (char*)&debug->sy_symbol.ost_auxent[0], S_GET_NUMBER_AUXILIARY(debug) * AUXESZ);
} /* Move all the auxiliary information */
/* Move the debug flags. */
SF_SET_DEBUG_FIELD(normal, SF_GET_DEBUG_FIELD(debug));
} /* c_symbol_merge() */
static symbolS *previous_file_symbol = NULL;
void c_dot_file_symbol(filename)
char *filename;
{
symbolS* symbolP;
symbolP = symbol_new(".file",
SEG_DEBUG,
0,
&zero_address_frag);
S_SET_STORAGE_CLASS(symbolP, C_FILE);
S_SET_NUMBER_AUXILIARY(symbolP, 1);
SA_SET_FILE_FNAME(symbolP, filename);
SF_SET_DEBUG(symbolP);
S_SET_VALUE(symbolP, (long) previous_file_symbol);
previous_file_symbol = symbolP;
/* Make sure that the symbol is first on the symbol chain */
if (symbol_rootP != symbolP) {
if (symbolP == symbol_lastP) {
symbol_lastP = symbol_lastP->sy_previous;
} /* if it was the last thing on the list */
symbol_remove(symbolP, &symbol_rootP, &symbol_lastP);
symbol_insert(symbolP, symbol_rootP, &symbol_rootP, &symbol_lastP);
symbol_rootP = symbolP;
} /* if not first on the list */
} /* c_dot_file_symbol() */
/*
* Build a 'section static' symbol.
*/
char *c_section_symbol(name, value, length, nreloc, nlnno)
char *name;
long value;
long length;
unsigned short nreloc;
unsigned short nlnno;
{
symbolS *symbolP;
symbolP = symbol_new(name,
(name[1] == 't'
? SEG_TEXT
: (name[1] == 'd'
? SEG_DATA
: SEG_BSS)),
value,
&zero_address_frag);
S_SET_STORAGE_CLASS(symbolP, C_STAT);
S_SET_NUMBER_AUXILIARY(symbolP, 1);
SA_SET_SCN_SCNLEN(symbolP, length);
SA_SET_SCN_NRELOC(symbolP, nreloc);
SA_SET_SCN_NLINNO(symbolP, nlnno);
SF_SET_STATICS(symbolP);
return (char*)symbolP;
} /* c_section_symbol() */
void c_section_header(header,
name,
core_address,
size,
data_ptr,
reloc_ptr,
lineno_ptr,
reloc_number,
lineno_number,
alignment)
#ifdef BFD_HEADERS
struct internal_scnhdr *header;
#else
SCNHDR *header;
#endif
char *name;
long core_address;
long size;
long data_ptr;
long reloc_ptr;
long lineno_ptr;
long reloc_number;
long lineno_number;
long alignment;
{
strncpy(header->s_name, name, 8);
header->s_paddr = header->s_vaddr = core_address;
header->s_scnptr = ((header->s_size = size) != 0) ? data_ptr : 0;
header->s_relptr = reloc_ptr;
header->s_lnnoptr = lineno_ptr;
header->s_nreloc = reloc_number;
header->s_nlnno = lineno_number;
#ifdef OBJ_COFF_SECTION_HEADER_HAS_ALIGNMENT
#ifdef OBJ_COFF_BROKEN_ALIGNMENT
header->s_align = ((name[1] == 'b' || (size > 0)) ? 16 : 0);
#else
header->s_align = ((alignment == 0)
? 0
: (1 << alignment));
#endif /* OBJ_COFF_BROKEN_ALIGNMENT */
#endif /* OBJ_COFF_SECTION_HEADER_HAS_ALIGNMENT */
header->s_flags = STYP_REG | (name[1] == 't'
? STYP_TEXT
: (name[1] == 'd'
? STYP_DATA
: (name[1] == 'b'
? STYP_BSS
: STYP_INFO)));
return;
} /* c_section_header() */
/* Line number handling */
int function_lineoff = -1; /* Offset in line#s where the last function
started (the odd entry for line #0) */
int text_lineno_number = 0;
int our_lineno_number = 0; /* we use this to build pointers from .bf's
into the linetable. It should match
exactly the values that are later
assigned in text_lineno_number by
write.c. */
lineno* lineno_lastP = (lineno*)0;
int
c_line_new(paddr, line_number, frag)
long paddr;
unsigned short line_number;
fragS* frag;
{
lineno* new_line = (lineno*)xmalloc(sizeof(lineno));
new_line->line.l_addr.l_paddr = paddr;
new_line->line.l_lnno = line_number;
new_line->frag = (char*)frag;
new_line->next = (lineno*)0;
if (lineno_rootP == (lineno*)0)
lineno_rootP = new_line;
else
lineno_lastP->next = new_line;
lineno_lastP = new_line;
return LINESZ * our_lineno_number++;
}
void obj_emit_lineno(where, line, file_start)
char **where;
lineno *line;
char *file_start;
{
#ifdef BFD_HEADERS
struct bfd_internal_lineno *line_entry;
#else
LINENO *line_entry;
#endif
for (; line; line = line->next) {
line_entry = &line->line;
/* FIXME-SOMEDAY Resolving the sy_number of function linno's used to be done in
write_object_file() but their symbols need a fileptr to the lnno, so
I moved this resolution check here. xoxorich. */
if (line_entry->l_lnno == 0) {
/* There is a good chance that the symbol pointed to
is not the one that will be emitted and that the
sy_number is not accurate. */
/* char *name; */
symbolS *symbolP;
symbolP = (symbolS *) line_entry->l_addr.l_symndx;
line_entry->l_addr.l_symndx = symbolP->sy_number;
symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_fcn.x_lnnoptr = *where - file_start;
} /* if this is a function linno */
#ifdef BFD_HEADERS
*where += bfd_coff_swap_lineno_out(stdoutput, line_entry, *where);
#else
/* No matter which member of the union we process, they are
both long. */
#ifdef CROSS_COMPILE
md_number_to_chars(*where, line_entry->l_addr.l_paddr, sizeof(line_entry->l_addr.l_paddr));
*where += sizeof(line_entry->l_addr.l_paddr);
md_number_to_chars(*where, line_entry->l_lnno, sizeof(line_entry->l_lnno));
*where += sizeof(line_entry->l_lnno);
#ifdef TC_I960
**where = '0';
++*where;
**where = '0';
++*where;
#endif /* TC_I960 */
#else /* CROSS_COMPILE */
append(where, (char *) line_entry, LINESZ);
#endif /* CROSS_COMPILE */
#endif /* BFD_HEADERS */
} /* for each line number */
return ;
} /* obj_emit_lineno() */
void obj_symbol_new_hook(symbolP)
symbolS *symbolP;
{
char underscore = 0; /* Symbol has leading _ */
/* Effective symbol */
/* Store the pointer in the offset. */
S_SET_ZEROES(symbolP, 0L);
S_SET_DATA_TYPE(symbolP, T_NULL);
S_SET_STORAGE_CLASS(symbolP, 0);
S_SET_NUMBER_AUXILIARY(symbolP, 0);
/* Additional information */
symbolP->sy_symbol.ost_flags = 0;
/* Auxiliary entries */
memset((char*) &symbolP->sy_symbol.ost_auxent[0], '\0', AUXESZ);
#ifdef STRIP_UNDERSCORE
/* Remove leading underscore at the beginning of the symbol.
* This is to be compatible with the standard librairies.
*/
if (*S_GET_NAME(symbolP) == '_') {
underscore = 1;
S_SET_NAME(symbolP, S_GET_NAME(symbolP) + 1);
} /* strip underscore */
#endif /* STRIP_UNDERSCORE */
if (S_IS_STRING(symbolP))
SF_SET_STRING(symbolP);
if (!underscore && S_IS_LOCAL(symbolP))
SF_SET_LOCAL(symbolP);
return;
} /* obj_symbol_new_hook() */
/* stack stuff */
stack* stack_init(chunk_size, element_size)
unsigned long chunk_size;
unsigned long element_size;
{
stack* st;
if ((st = (stack*)malloc(sizeof(stack))) == (stack*)0)
return (stack*)0;
if ((st->data = malloc(chunk_size)) == (char*)0) {
free(st);
return (stack*)0;
}
st->pointer = 0;
st->size = chunk_size;
st->chunk_size = chunk_size;
st->element_size = element_size;
return st;
} /* stack_init() */
void stack_delete(st)
stack* st;
{
free(st->data);
free(st);
}
char *stack_push(st, element)
stack *st;
char *element;
{
if (st->pointer + st->element_size >= st->size) {
st->size += st->chunk_size;
if ((st->data = xrealloc(st->data, st->size)) == (char*)0)
return (char*)0;
}
memcpy(st->data + st->pointer, element, st->element_size);
st->pointer += st->element_size;
return st->data + st->pointer;
} /* stack_push() */
char* stack_pop(st)
stack* st;
{
if ((st->pointer -= st->element_size) < 0) {
st->pointer = 0;
return (char*)0;
}
return st->data + st->pointer;
}
char* stack_top(st)
stack* st;
{
return st->data + st->pointer - st->element_size;
}
/*
* Handle .ln directives.
*/
static void obj_coff_ln() {
if (def_symbol_in_progress != NULL) {
as_warn(".ln pseudo-op inside .def/.endef: ignored.");
demand_empty_rest_of_line();
return;
} /* wrong context */
c_line_new(obstack_next_free(&frags) - frag_now->fr_literal,
get_absolute_expression(),
frag_now);
demand_empty_rest_of_line();
return;
} /* obj_coff_line() */
/*
* def()
*
* Handle .def directives.
*
* One might ask : why can't we symbol_new if the symbol does not
* already exist and fill it with debug information. Because of
* the C_EFCN special symbol. It would clobber the value of the
* function symbol before we have a chance to notice that it is
* a C_EFCN. And a second reason is that the code is more clear this
* way. (at least I think it is :-).
*
*/
#define SKIP_SEMI_COLON() while (*input_line_pointer++ != ';')
#define SKIP_WHITESPACES() while (*input_line_pointer == ' ' || \
*input_line_pointer == '\t') \
input_line_pointer++;
static void obj_coff_def(what)
int what;
{
char name_end; /* Char after the end of name */
char *symbol_name; /* Name of the debug symbol */
char *symbol_name_copy; /* Temporary copy of the name */
unsigned int symbol_name_length;
/*$char* directiveP;$ */ /* Name of the pseudo opcode */
/*$char directive[MAX_DIRECTIVE];$ */ /* Backup of the directive */
/*$char end = 0;$ */ /* If 1, stop parsing */
if (def_symbol_in_progress != NULL) {
as_warn(".def pseudo-op used inside of .def/.endef: ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
SKIP_WHITESPACES();
def_symbol_in_progress = (symbolS *) obstack_alloc(&notes, sizeof(*def_symbol_in_progress));
memset(def_symbol_in_progress, '\0', sizeof(*def_symbol_in_progress));
symbol_name = input_line_pointer;
name_end = get_symbol_end();
symbol_name_length = strlen(symbol_name);
symbol_name_copy = xmalloc(symbol_name_length + 1);
strcpy(symbol_name_copy, symbol_name);
/* Initialize the new symbol */
#ifdef STRIP_UNDERSCORE
S_SET_NAME(def_symbol_in_progress, (*symbol_name_copy == '_'
? symbol_name_copy + 1
: symbol_name_copy));
#else /* STRIP_UNDERSCORE */
S_SET_NAME(def_symbol_in_progress, symbol_name_copy);
#endif /* STRIP_UNDERSCORE */
/* free(symbol_name_copy); */
def_symbol_in_progress->sy_name_offset = ~0;
def_symbol_in_progress->sy_number = ~0;
def_symbol_in_progress->sy_frag = &zero_address_frag;
if (S_IS_STRING(def_symbol_in_progress)) {
SF_SET_STRING(def_symbol_in_progress);
} /* "long" name */
*input_line_pointer = name_end;
demand_empty_rest_of_line();
return;
} /* obj_coff_def() */
unsigned int dim_index;
static void obj_coff_endef() {
symbolS *symbolP;
/* DIM BUG FIX sac@cygnus.com */
dim_index =0;
if (def_symbol_in_progress == NULL) {
as_warn(".endef pseudo-op used outside of .def/.endef: ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
/* Set the section number according to storage class. */
switch (S_GET_STORAGE_CLASS(def_symbol_in_progress)) {
case C_STRTAG:
case C_ENTAG:
case C_UNTAG:
SF_SET_TAG(def_symbol_in_progress);
/* intentional fallthrough */
case C_FILE:
case C_TPDEF:
SF_SET_DEBUG(def_symbol_in_progress);
S_SET_SEGMENT(def_symbol_in_progress, SEG_DEBUG);
break;
case C_EFCN:
SF_SET_LOCAL(def_symbol_in_progress); /* Do not emit this symbol. */
/* intentional fallthrough */
case C_BLOCK:
SF_SET_PROCESS(def_symbol_in_progress); /* Will need processing before writing */
/* intentional fallthrough */
case C_FCN:
S_SET_SEGMENT(def_symbol_in_progress, SEG_TEXT);
if (def_symbol_in_progress->sy_symbol.ost_entry.n_name[1] == 'b') { /* .bf */
if (function_lineoff < 0) {
fprintf(stderr, "`.bf' symbol without preceding function\n");
} /* missing function symbol */
SA_GET_SYM_LNNOPTR(def_symbol_in_progress) = function_lineoff;
SF_SET_PROCESS(def_symbol_in_progress); /* Will need relocating */
function_lineoff = -1;
}
break;
#ifdef C_AUTOARG
case C_AUTOARG:
#endif /* C_AUTOARG */
case C_AUTO:
case C_REG:
case C_MOS:
case C_MOE:
case C_MOU:
case C_ARG:
case C_REGPARM:
case C_FIELD:
case C_EOS:
SF_SET_DEBUG(def_symbol_in_progress);
S_SET_SEGMENT(def_symbol_in_progress, SEG_ABSOLUTE);
break;
case C_EXT:
case C_STAT:
case C_LABEL:
/* Valid but set somewhere else (s_comm, s_lcomm, colon) */
break;
case C_USTATIC:
case C_EXTDEF:
case C_ULABEL:
as_warn("unexpected storage class %d", S_GET_STORAGE_CLASS(def_symbol_in_progress));
break;
} /* switch on storage class */
/* Now that we have built a debug symbol, try to
find if we should merge with an existing symbol
or not. If a symbol is C_EFCN or SEG_ABSOLUTE or
untagged SEG_DEBUG it never merges. */
/* Two cases for functions. Either debug followed
by definition or definition followed by debug.
For definition first, we will merge the debug
symbol into the definition. For debug first, the
lineno entry MUST point to the definition
function or else it will point off into space
when obj_crawl_symbol_chain() merges the debug
symbol into the real symbol. Therefor, let's
presume the debug symbol is a real function
reference. */
/* FIXME-SOON If for some reason the definition
label/symbol is never seen, this will probably
leave an undefined symbol at link time. */
if (S_GET_STORAGE_CLASS(def_symbol_in_progress) == C_EFCN
|| (S_GET_SEGMENT(def_symbol_in_progress) == SEG_DEBUG
&& !SF_GET_TAG(def_symbol_in_progress))
|| S_GET_SEGMENT(def_symbol_in_progress) == SEG_ABSOLUTE
|| (symbolP = symbol_find_base(S_GET_NAME(def_symbol_in_progress), DO_NOT_STRIP)) == NULL) {
symbol_append(def_symbol_in_progress, symbol_lastP, &symbol_rootP, &symbol_lastP);
} else {
/* This symbol already exists, merge the
newly created symbol into the old one.
This is not mandatory. The linker can
handle duplicate symbols correctly. But I
guess that it save a *lot* of space if
the assembly file defines a lot of
symbols. [loic] */
/* The debug entry (def_symbol_in_progress)
is merged into the previous definition. */
c_symbol_merge(def_symbol_in_progress, symbolP);
/* FIXME-SOON Should *def_symbol_in_progress be free'd? xoxorich. */
def_symbol_in_progress = symbolP;
if (SF_GET_FUNCTION(def_symbol_in_progress)
|| SF_GET_TAG(def_symbol_in_progress)) {
/* For functions, and tags, the symbol *must* be where the debug symbol
appears. Move the existing symbol to the current place. */
/* If it already is at the end of the symbol list, do nothing */
if (def_symbol_in_progress != symbol_lastP) {
symbol_remove(def_symbol_in_progress, &symbol_rootP, &symbol_lastP);
symbol_append(def_symbol_in_progress, symbol_lastP, &symbol_rootP, &symbol_lastP);
} /* if not already in place */
} /* if function */
} /* normal or mergable */
if (SF_GET_TAG(def_symbol_in_progress)
&& symbol_find_base(S_GET_NAME(def_symbol_in_progress), DO_NOT_STRIP) == NULL) {
tag_insert(S_GET_NAME(def_symbol_in_progress), def_symbol_in_progress);
} /* If symbol is a {structure,union} tag, associate symbol to its name. */
if (SF_GET_FUNCTION(def_symbol_in_progress)) {
know(sizeof(def_symbol_in_progress) <= sizeof(long));
function_lineoff = c_line_new((long) def_symbol_in_progress, 0, &zero_address_frag);
SF_SET_PROCESS(def_symbol_in_progress);
if (symbolP == NULL) {
/* That is, if this is the first
time we've seen the function... */
symbol_table_insert(def_symbol_in_progress);
} /* definition follows debug */
} /* Create the line number entry pointing to the function being defined */
def_symbol_in_progress = NULL;
demand_empty_rest_of_line();
return;
} /* obj_coff_endef() */
static void obj_coff_dim()
{
register int dim_index;
if (def_symbol_in_progress == NULL) {
as_warn(".dim pseudo-op used outside of .def/.endef: ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
S_SET_NUMBER_AUXILIARY(def_symbol_in_progress, 1);
for (dim_index = 0; dim_index < DIMNUM; dim_index++) {
SKIP_WHITESPACES();
SA_SET_SYM_DIMEN(def_symbol_in_progress, dim_index, get_absolute_expression());
switch (*input_line_pointer) {
case ',':
input_line_pointer++;
break;
default:
as_warn("badly formed .dim directive ignored");
/* intentional fallthrough */
case '\n':
case ';':
dim_index = DIMNUM;
break;
} /* switch on following character */
} /* for each dimension */
demand_empty_rest_of_line();
return;
} /* obj_coff_dim() */
static void obj_coff_line() {
if (def_symbol_in_progress == NULL) {
obj_coff_ln();
return;
} /* if it looks like a stabs style line */
S_SET_NUMBER_AUXILIARY(def_symbol_in_progress, 1);
SA_SET_SYM_LNNO(def_symbol_in_progress, get_absolute_expression());
demand_empty_rest_of_line();
return;
} /* obj_coff_line() */
static void obj_coff_size() {
if (def_symbol_in_progress == NULL) {
as_warn(".size pseudo-op used outside of .def/.endef ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
S_SET_NUMBER_AUXILIARY(def_symbol_in_progress, 1);
SA_SET_SYM_SIZE(def_symbol_in_progress, get_absolute_expression());
demand_empty_rest_of_line();
return;
} /* obj_coff_size() */
static void obj_coff_scl() {
if (def_symbol_in_progress == NULL) {
as_warn(".scl pseudo-op used outside of .def/.endef ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
S_SET_STORAGE_CLASS(def_symbol_in_progress, get_absolute_expression());
demand_empty_rest_of_line();
return;
} /* obj_coff_scl() */
static void obj_coff_tag() {
char *symbol_name;
char name_end;
if (def_symbol_in_progress == NULL) {
as_warn(".tag pseudo-op used outside of .def/.endef ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
S_SET_NUMBER_AUXILIARY(def_symbol_in_progress, 1);
symbol_name = input_line_pointer;
name_end = get_symbol_end();
/* Assume that the symbol referred to by .tag is always defined. */
/* This was a bad assumption. I've added find_or_make. xoxorich. */
SA_SET_SYM_TAGNDX(def_symbol_in_progress, (long) tag_find_or_make(symbol_name));
if (SA_GET_SYM_TAGNDX(def_symbol_in_progress) == 0L) {
as_warn("tag not found for .tag %s", symbol_name);
} /* not defined */
SF_SET_TAGGED(def_symbol_in_progress);
*input_line_pointer = name_end;
demand_empty_rest_of_line();
return;
} /* obj_coff_tag() */
static void obj_coff_type() {
if (def_symbol_in_progress == NULL) {
as_warn(".type pseudo-op used outside of .def/.endef ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
S_SET_DATA_TYPE(def_symbol_in_progress, get_absolute_expression());
if (ISFCN(S_GET_DATA_TYPE(def_symbol_in_progress)) &&
S_GET_STORAGE_CLASS(def_symbol_in_progress) != C_TPDEF) {
SF_SET_FUNCTION(def_symbol_in_progress);
} /* is a function */
demand_empty_rest_of_line();
return;
} /* obj_coff_type() */
static void obj_coff_val() {
if (def_symbol_in_progress == NULL) {
as_warn(".val pseudo-op used outside of .def/.endef ignored.");
demand_empty_rest_of_line();
return;
} /* if not inside .def/.endef */
if (is_name_beginner(*input_line_pointer)) {
char *symbol_name = input_line_pointer;
char name_end = get_symbol_end();
if (!strcmp(symbol_name, ".")) {
def_symbol_in_progress->sy_frag = frag_now;
S_SET_VALUE(def_symbol_in_progress, obstack_next_free(&frags) - frag_now->fr_literal);
/* If the .val is != from the .def (e.g. statics) */
} else if (strcmp(S_GET_NAME(def_symbol_in_progress), symbol_name)) {
def_symbol_in_progress->sy_forward = symbol_find_or_make(symbol_name);
/* If the segment is undefined when the forward
reference is solved, then copy the segment id
from the forward symbol. */
SF_SET_GET_SEGMENT(def_symbol_in_progress);
}
/* Otherwise, it is the name of a non debug symbol and its value will be calculated later. */
*input_line_pointer = name_end;
} else {
S_SET_VALUE(def_symbol_in_progress, get_absolute_expression());
} /* if symbol based */
demand_empty_rest_of_line();
return;
} /* obj_coff_val() */
/*
* Maintain a list of the tagnames of the structres.
*/
static void tag_init() {
tag_hash = hash_new();
return ;
} /* tag_init() */
static void tag_insert(name, symbolP)
char *name;
symbolS *symbolP;
{
register char * error_string;
if (*(error_string = hash_jam(tag_hash, name, (char *)symbolP))) {
as_fatal("Inserting \"%s\" into structure table failed: %s",
name, error_string);
}
return ;
} /* tag_insert() */
static symbolS *tag_find_or_make(name)
char *name;
{
symbolS *symbolP;
if ((symbolP = tag_find(name)) == NULL) {
symbolP = symbol_new(name,
SEG_UNKNOWN,
0,
&zero_address_frag);
tag_insert(S_GET_NAME(symbolP), symbolP);
symbol_table_insert(symbolP);
} /* not found */
return(symbolP);
} /* tag_find_or_make() */
static symbolS *tag_find(name)
char *name;
{
#ifdef STRIP_UNDERSCORE
if (*name == '_') name++;
#endif /* STRIP_UNDERSCORE */
return((symbolS*)hash_find(tag_hash, name));
} /* tag_find() */
void obj_read_begin_hook() {
/* These had better be the same. Usually 18 bytes. */
#ifndef BFD_HEADERS
know(sizeof(SYMENT) == sizeof(AUXENT));
know(SYMESZ == AUXESZ);
#endif
tag_init();
return;
} /* obj_read_begin_hook() */
void obj_crawl_symbol_chain(headers)
object_headers *headers;
{
int symbol_number = 0;
lineno *lineP;
symbolS *last_functionP = NULL;
symbolS *last_tagP;
symbolS *symbolP;
symbolS *symbol_externP = NULL;
symbolS *symbol_extern_lastP = NULL;
/* Initialize the stack used to keep track of the matching .bb .be */
stack* block_stack = stack_init(512, sizeof(symbolS*));
/* JF deal with forward references first... */
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
if (symbolP->sy_forward) {
S_SET_VALUE(symbolP, (S_GET_VALUE(symbolP)
+ S_GET_VALUE(symbolP->sy_forward)
+ symbolP->sy_forward->sy_frag->fr_address));
if (
#ifndef TE_I386AIX
SF_GET_GET_SEGMENT(symbolP)
#else
SF_GET_GET_SEGMENT(symbolP)
&& S_GET_SEGMENT(symbolP) == SEG_UNKNOWN
#endif /* TE_I386AIX */
) {
S_SET_SEGMENT(symbolP, S_GET_SEGMENT(symbolP->sy_forward));
} /* forward segment also */
symbolP->sy_forward=0;
} /* if it has a forward reference */
} /* walk the symbol chain */
tc_crawl_symbol_chain(headers);
/* The symbol list should be ordered according to the following sequence
* order :
* . .file symbol
* . debug entries for functions
* . fake symbols for .text .data and .bss
* . defined symbols
* . undefined symbols
* But this is not mandatory. The only important point is to put the
* undefined symbols at the end of the list.
*/
if (symbol_rootP == NULL
|| S_GET_STORAGE_CLASS(symbol_rootP) != C_FILE) {
know(!previous_file_symbol);
c_dot_file_symbol("fake");
} /* Is there a .file symbol ? If not insert one at the beginning. */
/*
* Build up static symbols for .text, .data and .bss
*/
dot_text_symbol = (symbolS*)
c_section_symbol(".text",
0,
H_GET_TEXT_SIZE(headers),
0/*text_relocation_number */,
0/*text_lineno_number */);
#ifdef TE_I386AIX
symbol_remove(dot_text_symbol, &symbol_rootP, &symbol_lastP);
symbol_append(dot_text_symbol, previous_file_symbol,
&symbol_rootP, &symbol_lastP);
#endif /* TE_I386AIX */
dot_data_symbol = (symbolS*)
c_section_symbol(".data",
H_GET_TEXT_SIZE(headers),
H_GET_DATA_SIZE(headers),
0/*data_relocation_number */,
0); /* There are no data lineno entries */
#ifdef TE_I386AIX
symbol_remove(dot_data_symbol, &symbol_rootP, &symbol_lastP);
symbol_append(dot_data_symbol, dot_text_symbol,
&symbol_rootP, &symbol_lastP);
#endif /* TE_I386AIX */
dot_bss_symbol = (symbolS*)
c_section_symbol(".bss",
H_GET_TEXT_SIZE(headers) + H_GET_DATA_SIZE(headers),
H_GET_BSS_SIZE(headers),
0, /* No relocation for a bss section. */
0); /* There are no bss lineno entries */
#ifdef TE_I386AIX
symbol_remove(dot_bss_symbol, &symbol_rootP, &symbol_lastP);
symbol_append(dot_bss_symbol, dot_data_symbol,
&symbol_rootP, &symbol_lastP);
#endif /* TE_I386AIX */
#if defined(DEBUG)
verify_symbol_chain(symbol_rootP, symbol_lastP);
#endif /* DEBUG */
/* Three traversals of symbol chains here. The
first traversal yanks externals into a temporary
chain, removing the externals from the global
chain, numbers symbols, and does some other guck.
The second traversal is on the temporary chain of
externals and just appends them to the global
chain again, numbering them as we go. The third
traversal patches pointers to symbols (using sym
indexes). The last traversal was once done as
part of the first pass, but that fails when a
reference preceeds a definition as the definition
has no number at the time we process the
reference. */
/* Note that symbolP will be NULL at the end of a loop
if an external was at the beginning of the list (it
gets moved off the list). Hence the weird check in
the loop control.
*/
for (symbolP = symbol_rootP;
symbolP;
symbolP = symbolP ? symbol_next(symbolP) : symbol_rootP) {
if (!SF_GET_DEBUG(symbolP)) {
/* Debug symbols do not need all this rubbish */
symbolS* real_symbolP;
/* L* and C_EFCN symbols never merge. */
if (!SF_GET_LOCAL(symbolP)
&& (real_symbolP = symbol_find_base(S_GET_NAME(symbolP), DO_NOT_STRIP))
&& real_symbolP != symbolP) {
/* FIXME-SOON: where do dups come from? Maybe tag references before definitions? xoxorich. */
/* Move the debug data from the debug symbol to the
real symbol. Do NOT do the oposite (i.e. move from
real symbol to debug symbol and remove real symbol from the
list.) Because some pointers refer to the real symbol
whereas no pointers refer to the debug symbol. */
c_symbol_merge(symbolP, real_symbolP);
/* Replace the current symbol by the real one */
/* The symbols will never be the last or the first
because : 1st symbol is .file and 3 last symbols are
.text, .data, .bss */
symbol_remove(real_symbolP, &symbol_rootP, &symbol_lastP);
symbol_insert(real_symbolP, symbolP, &symbol_rootP, &symbol_lastP);
symbol_remove(symbolP, &symbol_rootP, &symbol_lastP);
symbolP = real_symbolP;
} /* if not local but dup'd */
if (flagseen['R'] && (S_GET_SEGMENT(symbolP) == SEG_DATA)) {
S_SET_SEGMENT(symbolP, SEG_TEXT);
} /* push data into text */
S_SET_VALUE(symbolP, S_GET_VALUE(symbolP) + symbolP->sy_frag->fr_address);
if (!S_IS_DEFINED(symbolP) && !SF_GET_LOCAL(symbolP)) {
S_SET_EXTERNAL(symbolP);
} else if (S_GET_STORAGE_CLASS(symbolP) == C_NULL) {
if (S_GET_SEGMENT(symbolP) == SEG_TEXT){
S_SET_STORAGE_CLASS(symbolP, C_LABEL);
} else {
S_SET_STORAGE_CLASS(symbolP, C_STAT);
}
} /* no storage class yet */
/* Mainly to speed up if not -g */
if (SF_GET_PROCESS(symbolP)) {
/* Handle the nested blocks auxiliary info. */
if (S_GET_STORAGE_CLASS(symbolP) == C_BLOCK) {
if (!strcmp(S_GET_NAME(symbolP), ".bb"))
stack_push(block_stack, (char *) &symbolP);
else { /* .eb */
register symbolS* begin_symbolP;
begin_symbolP = *(symbolS**)stack_pop(block_stack);
if (begin_symbolP == (symbolS*)0)
as_warn("mismatched .eb");
else
SA_SET_SYM_ENDNDX(begin_symbolP, symbol_number+2);
}
}
/* If we are able to identify the type of a function, and we
are out of a function (last_functionP == 0) then, the
function symbol will be associated with an auxiliary
entry. */
if (last_functionP == (symbolS*)0 &&
SF_GET_FUNCTION(symbolP)) {
last_functionP = symbolP;
if (S_GET_NUMBER_AUXILIARY(symbolP) < 1) {
S_SET_NUMBER_AUXILIARY(symbolP, 1);
} /* make it at least 1 */
/* Clobber possible stale .dim information. */
memset(symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen,
'\0', sizeof(symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen));
}
/* The C_FCN doesn't need any additional information.
I don't even know if this is needed for sdb. But the
standard assembler generates it, so...
*/
if (S_GET_STORAGE_CLASS(symbolP) == C_EFCN) {
if (last_functionP == (symbolS*)0)
as_fatal("C_EFCN symbol out of scope");
SA_SET_SYM_FSIZE(last_functionP,
(long)(S_GET_VALUE(symbolP) -
S_GET_VALUE(last_functionP)));
SA_SET_SYM_ENDNDX(last_functionP, symbol_number);
last_functionP = (symbolS*)0;
}
}
} else if (SF_GET_TAG(symbolP)) {
/* First descriptor of a structure must point to
the first slot after the structure description. */
last_tagP = symbolP;
} else if (S_GET_STORAGE_CLASS(symbolP) == C_EOS) {
/* +2 take in account the current symbol */
SA_SET_SYM_ENDNDX(last_tagP, symbol_number + 2);
} else if (S_GET_STORAGE_CLASS(symbolP) == C_FILE) {
if (S_GET_VALUE(symbolP)) {
S_SET_VALUE((symbolS *) S_GET_VALUE(symbolP), symbol_number);
S_SET_VALUE(symbolP, 0);
} /* no one points at the first .file symbol */
} /* if debug or tag or eos or file */
/* We must put the external symbols apart. The loader
does not bomb if we do not. But the references in
the endndx field for a .bb symbol are not corrected
if an external symbol is removed between .bb and .be.
I.e in the following case :
[20] .bb endndx = 22
[21] foo external
[22] .be
ld will move the symbol 21 to the end of the list but
endndx will still be 22 instead of 21. */
if (SF_GET_LOCAL(symbolP)) {
/* remove C_EFCN and LOCAL (L...) symbols */
/* next pointer remains valid */
symbol_remove(symbolP, &symbol_rootP, &symbol_lastP);
} else if (
#ifdef TE_I386AIX
S_GET_STORAGE_CLASS(symbolP) == C_EXT && !SF_GET_FUNCTION(symbolP)
#else /* not TE_I386AIX */
!S_IS_DEFINED(symbolP) && !S_IS_DEBUG(symbolP) && !SF_GET_STATICS(symbolP)
#endif /* not TE_I386AIX */
) {
/* if external, Remove from the list */
symbolS *hold = symbol_previous(symbolP);
symbol_remove(symbolP, &symbol_rootP, &symbol_lastP);
symbol_clear_list_pointers(symbolP);
symbol_append(symbolP, symbol_extern_lastP, &symbol_externP, &symbol_extern_lastP);
symbolP = hold;
} else {
if (SF_GET_STRING(symbolP)) {
symbolP->sy_name_offset = string_byte_count;
string_byte_count += strlen(S_GET_NAME(symbolP)) + 1;
} else {
symbolP->sy_name_offset = 0;
} /* fix "long" names */
symbolP->sy_number = symbol_number;
symbol_number += 1 + S_GET_NUMBER_AUXILIARY(symbolP);
} /* if local symbol */
} /* traverse the symbol list */
for (symbolP = symbol_externP; symbol_externP;) {
symbolS *tmp = symbol_externP;
/* append */
symbol_remove(tmp, &symbol_externP, &symbol_extern_lastP);
symbol_append(tmp, symbol_lastP, &symbol_rootP, &symbol_lastP);
/* and process */
if (SF_GET_STRING(tmp)) {
tmp->sy_name_offset = string_byte_count;
string_byte_count += strlen(S_GET_NAME(tmp)) + 1;
} else {
tmp->sy_name_offset = 0;
} /* fix "long" names */
tmp->sy_number = symbol_number;
symbol_number += 1 + S_GET_NUMBER_AUXILIARY(tmp);
} /* append the entire extern chain */
/* When a tag reference preceeds the tag definition,
the definition will not have a number at the time
we process the reference during the first
traversal. Thus, a second traversal. */
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
if (SF_GET_TAGGED(symbolP)) {
SA_SET_SYM_TAGNDX(symbolP, ((symbolS*) SA_GET_SYM_TAGNDX(symbolP))->sy_number);
} /* If the symbol has a tagndx entry, resolve it */
} /* second traversal */
know(symbol_externP == NULL);
know(symbol_extern_lastP == NULL);
/* FIXME-SOMEDAY I'm counting line no's here so we know what to put in the section
headers, and I'm resolving the addresses since I'm not sure how to
do it later. I am NOT resolving the linno's representing functions.
Their symbols need a fileptr pointing to this linno when emitted.
Thus, I resolve them on emit. xoxorich. */
for (lineP = lineno_rootP; lineP; lineP = lineP->next) {
if (lineP->line.l_lnno > 0) {
lineP->line.l_addr.l_paddr += ((fragS*)lineP->frag)->fr_address;
} else {
;
}
text_lineno_number++;
} /* for each line number */
H_SET_SYMBOL_TABLE_SIZE(headers, symbol_number);
return;
} /* obj_crawl_symbol_chain() */
/*
* Find strings by crawling along symbol table chain.
*/
void obj_emit_strings(where)
char **where;
{
symbolS *symbolP;
#ifdef CROSS_COMPILE
/* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
md_number_to_chars(*where, string_byte_count, sizeof(string_byte_count));
*where += sizeof(string_byte_count);
#else /* CROSS_COMPILE */
append(where, (char *) &string_byte_count, (unsigned long) sizeof(string_byte_count));
#endif /* CROSS_COMPILE */
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
if (SF_GET_STRING(symbolP)) {
append(where, S_GET_NAME(symbolP), (unsigned long)(strlen(S_GET_NAME(symbolP)) + 1));
} /* if it has a string */
} /* walk the symbol chain */
return;
} /* obj_emit_strings() */
void obj_pre_write_hook(headers)
object_headers *headers;
{
register int text_relocation_number = 0;
register int data_relocation_number = 0;
register fixS *fixP;
H_SET_MAGIC_NUMBER(headers, FILE_HEADER_MAGIC);
H_SET_ENTRY_POINT(headers, 0);
/* FIXME-SOMEDAY this should be done at
fixup_segment time but I'm going to wait until I
do multiple segments. xoxorich. */
/* Count the number of relocation entries for text and data */
for (fixP = text_fix_root; fixP; fixP = fixP->fx_next) {
if (fixP->fx_addsy) {
++text_relocation_number;
#ifdef TC_I960
/* two relocs per callj under coff. */
if (fixP->fx_callj) {
++text_relocation_number;
} /* if callj and not already fixed. */
#endif /* TC_I960 */
#ifdef TC_A29K
/* Count 2 for a constH */
if (fixP->fx_r_type == RELOC_CONSTH) {
++text_relocation_number;
}
#endif
} /* if not yet fixed */
} /* for each fix */
SA_SET_SCN_NRELOC(dot_text_symbol, text_relocation_number);
/* Assign the number of line number entries for the text section */
SA_SET_SCN_NLINNO(dot_text_symbol, text_lineno_number);
/* Assign the size of the section */
SA_SET_SCN_SCNLEN(dot_text_symbol, H_GET_TEXT_SIZE(headers));
for (fixP = data_fix_root; fixP; fixP = fixP->fx_next) {
if (fixP->fx_addsy) {
++data_relocation_number;
} /* if still relocatable */
#ifdef TC_A29K
/* Count 2 for a constH */
if (fixP->fx_r_type == RELOC_CONSTH) {
++data_relocation_number;
}
#endif
} /* for each fix */
SA_SET_SCN_NRELOC(dot_data_symbol, data_relocation_number);
/* Assign the size of the section */
SA_SET_SCN_SCNLEN(dot_data_symbol, H_GET_DATA_SIZE(headers));
/* Assign the size of the section */
SA_SET_SCN_SCNLEN(dot_bss_symbol, H_GET_BSS_SIZE(headers));
/* pre write hook can add relocs (for 960 and 29k coff) so */
headers->relocation_size = text_relocation_number * RELSZ +
data_relocation_number *RELSZ;
/* Fill in extra coff fields */
/* Initialize general line number information. */
H_SET_LINENO_SIZE(headers, text_lineno_number * LINESZ);
/* filehdr */
H_SET_FILE_MAGIC_NUMBER(headers, FILE_HEADER_MAGIC);
H_SET_NUMBER_OF_SECTIONS(headers, 3); /* text+data+bss */
#ifndef OBJ_COFF_OMIT_TIMESTAMP
H_SET_TIME_STAMP(headers, (long)time((long*)0));
#else /* OBJ_COFF_OMIT_TIMESTAMP */
H_SET_TIME_STAMP(headers, 0);
#endif /* OBJ_COFF_OMIT_TIMESTAMP */
H_SET_SYMBOL_TABLE_POINTER(headers, H_GET_SYMBOL_TABLE_FILE_OFFSET(headers));
#if 0
printf("FILHSZ %x\n", FILHSZ);
printf("OBJ_COFF_AOUTHDRSZ %x\n", OBJ_COFF_AOUTHDRSZ);
printf("section headers %x\n", H_GET_NUMBER_OF_SECTIONS(headers) * SCNHSZ);
printf("get text size %x\n", H_GET_TEXT_SIZE(headers));
printf("get data size %x\n", H_GET_DATA_SIZE(headers));
printf("get relocation size %x\n", H_GET_RELOCATION_SIZE(headers));
printf("get lineno size %x\n", H_GET_LINENO_SIZE(headers));
#endif
/* symbol table size allready set */
H_SET_SIZEOF_OPTIONAL_HEADER(headers, OBJ_COFF_AOUTHDRSZ);
/* do not added the F_RELFLG for the standard COFF.
* The AIX linker complain on file with relocation info striped flag.
*/
#ifdef KEEP_RELOC_INFO
H_SET_FLAGS(headers, (text_lineno_number == 0 ? F_LNNO : 0)
| BYTE_ORDERING);
#else
H_SET_FLAGS(headers, (text_lineno_number == 0 ? F_LNNO : 0)
| ((text_relocation_number + data_relocation_number) ? 0 : F_RELFLG)
| BYTE_ORDERING);
#endif
/* aouthdr */
/* magic number allready set */
H_SET_VERSION_STAMP(headers, 0);
/* Text, data, bss size; entry point; text_start and data_start are already set */
/* Build section headers */
c_section_header(&text_section_header,
".text",
0,
H_GET_TEXT_SIZE(headers),
H_GET_TEXT_FILE_OFFSET(headers),
(SA_GET_SCN_NRELOC(dot_text_symbol)
? H_GET_RELOCATION_FILE_OFFSET(headers)
: 0),
(text_lineno_number
? H_GET_LINENO_FILE_OFFSET(headers)
: 0),
SA_GET_SCN_NRELOC(dot_text_symbol),
text_lineno_number,
section_alignment[(int) SEG_TEXT]);
c_section_header(&data_section_header,
".data",
H_GET_TEXT_SIZE(headers),
H_GET_DATA_SIZE(headers),
(H_GET_DATA_SIZE(headers)
? H_GET_DATA_FILE_OFFSET(headers)
: 0),
(SA_GET_SCN_NRELOC(dot_data_symbol)
? (H_GET_RELOCATION_FILE_OFFSET(headers)
+ text_section_header.s_nreloc * RELSZ)
: 0),
0, /* No line number information */
SA_GET_SCN_NRELOC(dot_data_symbol),
0, /* No line number information */
section_alignment[(int) SEG_DATA]);
c_section_header(&bss_section_header,
".bss",
H_GET_TEXT_SIZE(headers) + H_GET_DATA_SIZE(headers),
H_GET_BSS_SIZE(headers),
0, /* No file offset */
0, /* No relocation information */
0, /* No line number information */
0, /* No relocation information */
0, /* No line number information */
section_alignment[(int) SEG_BSS]);
return;
} /* obj_pre_write_hook() */
/* This is a copy from aout. All I do is neglect to actually build the symbol. */
static void obj_coff_stab(what)
int what;
{
char *string;
expressionS e;
int goof = 0; /* TRUE if we have aborted. */
int length;
int saved_type = 0;
long longint;
symbolS *symbolP = 0;
if (what == 's') {
string = demand_copy_C_string(&length);
SKIP_WHITESPACE();
if (*input_line_pointer == ',') {
input_line_pointer++;
} else {
as_bad("I need a comma after symbol's name");
goof = 1;
} /* better be a comma */
} /* skip the string */
/*
* Input_line_pointer->after ','. String->symbol name.
*/
if (!goof) {
if (get_absolute_expression_and_terminator(&longint) != ',') {
as_bad("I want a comma after the n_type expression");
goof = 1;
input_line_pointer--; /* Backup over a non-',' char. */
} /* on error */
} /* no error */
if (!goof) {
if (get_absolute_expression_and_terminator(&longint) != ',') {
as_bad("I want a comma after the n_other expression");
goof = 1;
input_line_pointer--; /* Backup over a non-',' char. */
} /* on error */
} /* no error */
if (!goof) {
get_absolute_expression();
if (what == 's' || what == 'n') {
if (*input_line_pointer != ',') {
as_bad("I want a comma after the n_desc expression");
goof = 1;
} else {
input_line_pointer++;
} /* on goof */
} /* not stabd */
} /* no error */
expression(&e);
if (goof) {
ignore_rest_of_line();
} else {
demand_empty_rest_of_line();
} /* on error */
} /* obj_coff_stab() */
#ifdef DEBUG
/* for debugging */
char *s_get_name(s)
symbolS *s;
{
return((s == NULL) ? "(NULL)" : S_GET_NAME(s));
} /* s_get_name() */
void symbol_dump() {
symbolS *symbolP;
for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
printf("%3ld: 0x%lx \"%s\" type = %ld, class = %d, segment = %d\n",
symbolP->sy_number,
(unsigned long) symbolP,
S_GET_NAME(symbolP),
(long) S_GET_DATA_TYPE(symbolP),
S_GET_STORAGE_CLASS(symbolP),
(int) S_GET_SEGMENT(symbolP));
} /* traverse symbols */
return;
} /* symbol_dump() */
#endif /* DEBUG */
/*
* Local Variables:
* comment-column: 0
* fill-column: 131
* End:
*/
/* end of obj-coff.c */
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