[binutils.git] / gas / config / obj-bout.c

/* b.out object file format
   Copyright (C) 1989, 1990, 1991, 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "as.h"
#include "obstack.h"
#include "aout/stab_gnu.h"
const short /* in: segT   out: N_TYPE bits */
    seg_N_TYPE[] = {
	    N_ABS,
	    N_TEXT,
	    N_DATA,
	    N_BSS,
	    N_UNDF, /* unknown */
	    N_UNDF, /* absent */
	    N_UNDF, /* pass1 */
	    N_UNDF, /* error */
	    N_UNDF, /* bignum/flonum */
	    N_UNDF, /* difference */
	    N_REGISTER, /* register */
    };

const segT N_TYPE_seg [N_TYPE+2] = {	/* N_TYPE == 0x1E = 32-2 */
	SEG_UNKNOWN,			/* N_UNDF == 0 */
	SEG_GOOF,
	SEG_ABSOLUTE,			/* N_ABS == 2 */
	SEG_GOOF,
	SEG_TEXT,			/* N_TEXT == 4 */
	SEG_GOOF,
	SEG_DATA,			/* N_DATA == 6 */
	SEG_GOOF,
	SEG_BSS,			/* N_BSS == 8 */
	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_REGISTER,			/* dummy N_REGISTER for regs = 30 */
	SEG_GOOF,
};

#if __STDC__ == 1
static void obj_bout_stab(int what);
static void obj_bout_line(void);
static void obj_bout_desc(void);
#else /* not __STDC__ */
static void obj_bout_desc();
static void obj_bout_stab();
static void obj_bout_line();
#endif /* not __STDC__ */

const pseudo_typeS obj_pseudo_table[] = {
	/* stabs (aka a.out aka b.out directives for debug symbols) */
	{ "desc",	obj_bout_desc,		0	}, /* def */
	{ "line",	obj_bout_line,		0	}, /* source code line number */
	{ "stabd",	obj_bout_stab,		'd'	}, /* stabs */
	{ "stabn",	obj_bout_stab,		'n'	}, /* stabs */
	{ "stabs",	obj_bout_stab,		's'	}, /* stabs */
	
	/* coff debugging directives.  Currently ignored silently */
	{ "def",        s_ignore,		0 },
	{ "dim",        s_ignore,		0 },
	{ "endef",      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 },
	
	/* other stuff we don't handle */
	{ "ABORT",      s_ignore,		0 },
	{ "ident",      s_ignore,		0 },
	
	{ NULL}	/* end sentinel */
}; /* obj_pseudo_table */

/* Relocation. */

/*
 *		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;
{
	for (; fixP; fixP = fixP->fx_next) {
		if (fixP->fx_addsy != NULL) {
			tc_bout_fix_to_chars(*where, fixP, segment_address_in_file);
			*where += sizeof(struct relocation_info);
		} /* if there's a symbol */
	} /* for each fixup */
	
} /* emit_relocations() */

/* Aout file generation & utilities */

/* Convert a lvalue to machine dependent data */
void obj_header_append(where, headers)
char **where;
object_headers *headers;
{
	/* Always leave in host byte order */
	
	headers->header.a_talign = section_alignment[SEG_TEXT];
	
	if (headers->header.a_talign < 2){
		headers->header.a_talign = 2;
	} /* force to at least 2 */
	
	headers->header.a_dalign = section_alignment[SEG_DATA];
	headers->header.a_balign = section_alignment[SEG_BSS];
	
	headers->header.a_tload = 0;
	headers->header.a_dload = md_section_align(SEG_DATA, H_GET_TEXT_SIZE(headers));
	
	append(where, (char *) &headers->header, sizeof(headers->header));
} /* a_header_append() */

void obj_symbol_to_chars(where, symbolP)
char **where;
symbolS *symbolP;
{
	/* leave in host byte order */
	append(where, (char *)&symbolP->sy_symbol, sizeof(obj_symbol_type));
} /* obj_symbol_to_chars() */

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. */
		char *temp;
		
		temp = S_GET_NAME(symbolP);
		S_SET_OFFSET(symbolP, symbolP->sy_name_offset);
		
		/* Any symbol still undefined and is not a dbg symbol is made N_EXT. */
		if (!S_IS_DEBUG(symbolP) && !S_IS_DEFINED(symbolP)) S_SET_EXTERNAL(symbolP);
		
		obj_symbol_to_chars(where, symbolP);
		S_SET_NAME(symbolP,temp);
	}
} /* emit_symbols() */

void obj_symbol_new_hook(symbolP)
symbolS *symbolP;
{
	S_SET_OTHER(symbolP, 0);
	S_SET_DESC(symbolP, 0);
	return;
} /* obj_symbol_new_hook() */

static void obj_bout_line() {
	/* Assume delimiter is part of expression. */
	/* BSD4.2 as fails with delightful bug, so we */
	/* are not being incompatible here. */
	new_logical_line ((char *)NULL, (int)(get_absolute_expression ()));
	demand_empty_rest_of_line();
} /* obj_bout_line() */

/*
 *			stab()
 *
 * Handle .stabX directives, which used to be open-coded.
 * So much creeping featurism overloaded the semantics that we decided
 * to put all .stabX thinking in one place. Here.
 *
 * We try to make any .stabX directive legal. Other people's AS will often
 * do assembly-time consistency checks: eg assigning meaning to n_type bits
 * and "protecting" you from setting them to certain values. (They also zero
 * certain bits before emitting symbols. Tut tut.)
 *
 * If an expression is not absolute we either gripe or use the relocation
 * information. Other people's assemblers silently forget information they
 * don't need and invent information they need that you didn't supply.
 *
 * .stabX directives always make a symbol table entry. It may be junk if
 * the rest of your .stabX directive is malformed.
 */
static void obj_bout_stab(what)
int what;
{
	register symbolS *	symbolP = 0;
	register char *	string;
	int saved_type = 0;
	int length;
	int goof;	/* TRUE if we have aborted. */
	long longint;
	
	/*
	 * Enter with input_line_pointer pointing past .stabX and any following
	 * whitespace.
	 */
	goof = 0; /* JF who forgot this?? */
	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;
		}
	} else
	    string = "";
	
	/*
	 * Input_line_pointer->after ','.  String->symbol name.
	 */
	if (!goof) {
		symbolP = symbol_new(string,
				     SEG_UNKNOWN,
				     0,
				     (struct frag *)0);
		switch (what) {
		case 'd':
			S_SET_NAME(symbolP,NULL); /* .stabd feature. */
			S_SET_VALUE(symbolP,obstack_next_free(&frags) -
				    frag_now->fr_literal);
			symbolP->sy_frag = frag_now;
			break;
			
		case 'n':
			symbolP->sy_frag = &zero_address_frag;
			break;
			
		case 's':
			symbolP->sy_frag = & zero_address_frag;
			break;
			
		default:
			BAD_CASE(what);
			break;
		}
		if (get_absolute_expression_and_terminator(& longint) == ',')
		    symbolP->sy_symbol.n_type = saved_type = longint;
		else {
			as_bad("I want a comma after the n_type expression");
			goof = 1;
			input_line_pointer--; /* Backup over a non-',' char. */
		}
	}
	if (! goof) {
		if (get_absolute_expression_and_terminator (& longint) == ',')
		    S_SET_OTHER(symbolP,longint);
		else {
			as_bad("I want a comma after the n_other expression");
			goof = 1;
			input_line_pointer--; /* Backup over a non-',' char. */
		}
	}
	if (! goof) {
		S_SET_DESC(symbolP, 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 ++;
			}
		}
	}
	if ((! goof) && (what=='s' || what=='n')) {
		pseudo_set(symbolP);
		symbolP->sy_symbol.n_type = saved_type;
	}
#ifndef NO_LISTING
	{
		extern int listing;
		
		if (listing && !goof) 
		    {
			    if (symbolP->sy_symbol.n_type == N_SLINE) 
				{
					
					listing_source_line(symbolP->sy_symbol.n_desc);
				}
			    else if (symbolP->sy_symbol.n_type == N_SO
				     || symbolP->sy_symbol.n_type == N_SOL) 
				{
					listing_source_file(string);
				}			  
		    }
	}
	
#endif  
	
	if (goof)
	    ignore_rest_of_line ();
	else
	    demand_empty_rest_of_line ();
} /* obj_bout_stab() */

static void obj_bout_desc() {
	register char *name;
	register char c;
	register char *p;
	register symbolS *	symbolP;
	register int temp;
	
	/*
	 * Frob invented at RMS' request. Set the n_desc of a symbol.
	 */
	name = input_line_pointer;
	c = get_symbol_end();
	p = input_line_pointer;
	* p = c;
	SKIP_WHITESPACE();
	if (*input_line_pointer != ',') {
		*p = 0;
		as_bad("Expected comma after name \"%s\"", name);
		*p = c;
		ignore_rest_of_line();
	} else {
		input_line_pointer ++;
		temp = get_absolute_expression ();
		*p = 0;
		symbolP = symbol_find_or_make(name);
		*p = c;
		S_SET_DESC(symbolP,temp);
	}
	demand_empty_rest_of_line();
} /* obj_bout_desc() */

void obj_read_begin_hook() {
	return;
} /* obj_read_begin_hook() */

void obj_crawl_symbol_chain(headers)
object_headers *headers;
{
	symbolS **symbolPP;
	symbolS *symbolP;
	int symbol_number = 0;
	
	/* 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);
			
			symbolP->sy_forward=0;
		} /* if it has a forward reference */
	} /* walk the symbol chain */
	
	tc_crawl_symbol_chain(headers);
	
	symbolPP = & symbol_rootP;	/*->last symbol chain link. */
	while ((symbolP  = *symbolPP) != NULL) {
		if (flagseen['R'] && (S_GET_SEGMENT(symbolP) == SEG_DATA)) {
			S_SET_SEGMENT(symbolP, SEG_TEXT);
		} /* if pusing data into text */
		
		S_SET_VALUE(symbolP, S_GET_VALUE(symbolP) + symbolP->sy_frag->fr_address);
		
		/* OK, here is how we decide which symbols go out into the
		   brave new symtab.  Symbols that do are:
		   
		   * symbols with no name (stabd's?)
		   * symbols with debug info in their N_TYPE
		   
		   Symbols that don't are:
		   * symbols that are registers
		   * symbols with \1 as their 3rd character (numeric labels)
		   * "local labels" as defined by S_LOCAL_NAME(name)
		   if the -L switch was passed to gas.
		   
		   All other symbols are output.  We complain if a deleted
		   symbol was marked external. */
		
		
		if (1
		    && !S_IS_REGISTER(symbolP)
		    && (!S_GET_NAME(symbolP)
			|| S_IS_DEBUG(symbolP)
#ifdef TC_I960
			/* FIXME-SOON this ifdef seems highly dubious to me.  xoxorich. */
			|| !S_IS_DEFINED(symbolP)
			|| S_IS_EXTERNAL(symbolP)
#endif /* TC_I960 */
			|| (S_GET_NAME(symbolP)[0] != '\001' && (flagseen ['L'] || ! S_LOCAL_NAME(symbolP))))) {
			symbolP->sy_number = symbol_number++;
			
			/* The + 1 after strlen account for the \0 at the
			   end of each string */
			if (!S_IS_STABD(symbolP)) {
				/* Ordinary case. */
				symbolP->sy_name_offset = string_byte_count;
				string_byte_count += strlen(S_GET_NAME(symbolP)) + 1;
			}
			else	/* .Stabd case. */
			    symbolP->sy_name_offset = 0;
			symbolPP = &(symbol_next(symbolP));
		} else {
			if (S_IS_EXTERNAL(symbolP) || !S_IS_DEFINED(symbolP)) {
				as_bad("Local symbol %s never defined", S_GET_NAME(symbolP));
			} /* oops. */
			
			/* Unhook it from the chain */
			*symbolPP = symbol_next(symbolP);
		} /* if this symbol should be in the output */
	} /* for each symbol */
	
	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(S_GET_NAME(symbolP))
		    append(where, S_GET_NAME(symbolP), (unsigned long)(strlen (S_GET_NAME(symbolP)) + 1));
	} /* walk symbol chain */
	
	return;
} /* obj_emit_strings() */

/*
 * Local Variables:
 * comment-column: 0
 * fill-column: 131
 * End:
 */

/* end of obj-bout.c */
Commit	Line	Data
fecd2382	1	/* b.out object file format
01170860	2	Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
a39116f1 RP	3
	4	This file is part of GAS, the GNU Assembler.
	5
	6	GAS is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as
	8	published by the Free Software Foundation; either version 2,
	9	or (at your option) any later version.
	10
	11	GAS is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	14	the GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public
	17	License along with GAS; see the file COPYING. If not, write
	18	to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
fecd2382	19
fecd2382 RP	20	#include "as.h"
fecd2382 RP	21	#include "obstack.h"
86c094f2	22	#include "aout/stab_gnu.h"
fecd2382	23	const short /* in: segT out: N_TYPE bits */
a39116f1 RP	24	seg_N_TYPE[] = {
	25	N_ABS,
	26	N_TEXT,
	27	N_DATA,
	28	N_BSS,
	29	N_UNDF, /* unknown */
	30	N_UNDF, /* absent */
	31	N_UNDF, /* pass1 */
	32	N_UNDF, /* error */
	33	N_UNDF, /* bignum/flonum */
	34	N_UNDF, /* difference */
	35	N_REGISTER, /* register */
	36	};
fecd2382 RP	37
	38	const segT N_TYPE_seg [N_TYPE+2] = { /* N_TYPE == 0x1E = 32-2 */
	39	SEG_UNKNOWN, /* N_UNDF == 0 */
	40	SEG_GOOF,
	41	SEG_ABSOLUTE, /* N_ABS == 2 */
	42	SEG_GOOF,
	43	SEG_TEXT, /* N_TEXT == 4 */
	44	SEG_GOOF,
	45	SEG_DATA, /* N_DATA == 6 */
	46	SEG_GOOF,
	47	SEG_BSS, /* N_BSS == 8 */
	48	SEG_GOOF,
	49	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	50	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	51	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	52	SEG_REGISTER, /* dummy N_REGISTER for regs = 30 */
	53	SEG_GOOF,
	54	};
	55
a87b3269	56	#if __STDC__ == 1
fecd2382 RP	57	static void obj_bout_stab(int what);
	58	static void obj_bout_line(void);
	59	static void obj_bout_desc(void);
a87b3269	60	#else /* not __STDC__ */
fecd2382 RP	61	static void obj_bout_desc();
	62	static void obj_bout_stab();
	63	static void obj_bout_line();
a87b3269	64	#endif /* not __STDC__ */
fecd2382 RP	65
fecd2382 RP	66	const pseudo_typeS obj_pseudo_table[] = {
a39116f1	67	/* stabs (aka a.out aka b.out directives for debug symbols) */
fecd2382 RP	68	{ "desc", obj_bout_desc, 0 }, /* def */
	69	{ "line", obj_bout_line, 0 }, /* source code line number */
	70	{ "stabd", obj_bout_stab, 'd' }, /* stabs */
	71	{ "stabn", obj_bout_stab, 'n' }, /* stabs */
	72	{ "stabs", obj_bout_stab, 's' }, /* stabs */
a39116f1 RP	73
a39116f1 RP	74	/* coff debugging directives. Currently ignored silently */
fecd2382 RP	75	{ "def", s_ignore, 0 },
	76	{ "dim", s_ignore, 0 },
	77	{ "endef", s_ignore, 0 },
	78	{ "ln", s_ignore, 0 },
	79	{ "scl", s_ignore, 0 },
	80	{ "size", s_ignore, 0 },
	81	{ "tag", s_ignore, 0 },
	82	{ "type", s_ignore, 0 },
	83	{ "val", s_ignore, 0 },
a39116f1 RP	84
a39116f1 RP	85	/* other stuff we don't handle */
fecd2382 RP	86	{ "ABORT", s_ignore, 0 },
fecd2382 RP	87	{ "ident", s_ignore, 0 },
a39116f1	88
fecd2382 RP	89	{ NULL} /* end sentinel */
	90	}; /* obj_pseudo_table */
	91
	92	/* Relocation. */
	93
fecd2382 RP	94	/*
	95	* emit_relocations()
	96	*
	97	* Crawl along a fixS chain. Emit the segment's relocations.
	98	*/
	99	void obj_emit_relocations(where, fixP, segment_address_in_file)
	100	char **where;
	101	fixS fixP; / Fixup chain for this segment. */
	102	relax_addressT segment_address_in_file;
	103	{
a79c6033 RP	104	for (; fixP; fixP = fixP->fx_next) {
	105	if (fixP->fx_addsy != NULL) {
	106	tc_bout_fix_to_chars(*where, fixP, segment_address_in_file);
b97ea9ed	107	*where += sizeof(struct relocation_info);
a79c6033 RP	108	} /* if there's a symbol */
a79c6033 RP	109	} /* for each fixup */
a39116f1	110
fecd2382 RP	111	} /* emit_relocations() */
	112
	113	/* Aout file generation & utilities */
	114
	115	/* Convert a lvalue to machine dependent data */
	116	void obj_header_append(where, headers)
	117	char **where;
	118	object_headers *headers;
	119	{
	120	/* Always leave in host byte order */
a39116f1	121
fecd2382	122	headers->header.a_talign = section_alignment[SEG_TEXT];
a39116f1	123
fecd2382 RP	124	if (headers->header.a_talign < 2){
	125	headers->header.a_talign = 2;
	126	} /* force to at least 2 */
a39116f1	127
fecd2382 RP	128	headers->header.a_dalign = section_alignment[SEG_DATA];
fecd2382 RP	129	headers->header.a_balign = section_alignment[SEG_BSS];
a39116f1	130
fecd2382	131	headers->header.a_tload = 0;
a79c6033	132	headers->header.a_dload = md_section_align(SEG_DATA, H_GET_TEXT_SIZE(headers));
a39116f1	133
fecd2382 RP	134	append(where, (char *) &headers->header, sizeof(headers->header));
	135	} /* a_header_append() */
	136
	137	void obj_symbol_to_chars(where, symbolP)
	138	char **where;
	139	symbolS *symbolP;
	140	{
a39116f1	141	/* leave in host byte order */
fecd2382 RP	142	append(where, (char *)&symbolP->sy_symbol, sizeof(obj_symbol_type));
	143	} /* obj_symbol_to_chars() */
	144
	145	void obj_emit_symbols(where, symbol_rootP)
	146	char **where;
	147	symbolS *symbol_rootP;
	148	{
a39116f1 RP	149	symbolS * symbolP;
	150
	151	/*
	152	* Emit all symbols left in the symbol chain.
	153	*/
	154	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	155	/* Used to save the offset of the name. It is used to point
	156	to the string in memory but must be a file offset. */
	157	char *temp;
	158
	159	temp = S_GET_NAME(symbolP);
	160	S_SET_OFFSET(symbolP, symbolP->sy_name_offset);
	161
	162	/* Any symbol still undefined and is not a dbg symbol is made N_EXT. */
	163	if (!S_IS_DEBUG(symbolP) && !S_IS_DEFINED(symbolP)) S_SET_EXTERNAL(symbolP);
	164
	165	obj_symbol_to_chars(where, symbolP);
	166	S_SET_NAME(symbolP,temp);
	167	}
fecd2382 RP	168	} /* emit_symbols() */
	169
	170	void obj_symbol_new_hook(symbolP)
	171	symbolS *symbolP;
	172	{
	173	S_SET_OTHER(symbolP, 0);
	174	S_SET_DESC(symbolP, 0);
	175	return;
	176	} /* obj_symbol_new_hook() */
	177
	178	static void obj_bout_line() {
	179	/* Assume delimiter is part of expression. */
	180	/* BSD4.2 as fails with delightful bug, so we */
	181	/* are not being incompatible here. */
	182	new_logical_line ((char *)NULL, (int)(get_absolute_expression ()));
	183	demand_empty_rest_of_line();
	184	} /* obj_bout_line() */
	185
	186	/*
	187	* stab()
	188	*
	189	* Handle .stabX directives, which used to be open-coded.
	190	* So much creeping featurism overloaded the semantics that we decided
	191	* to put all .stabX thinking in one place. Here.
	192	*
	193	* We try to make any .stabX directive legal. Other people's AS will often
	194	* do assembly-time consistency checks: eg assigning meaning to n_type bits
	195	* and "protecting" you from setting them to certain values. (They also zero
	196	* certain bits before emitting symbols. Tut tut.)
	197	*
	198	* If an expression is not absolute we either gripe or use the relocation
	199	* information. Other people's assemblers silently forget information they
	200	* don't need and invent information they need that you didn't supply.
	201	*
	202	* .stabX directives always make a symbol table entry. It may be junk if
	203	* the rest of your .stabX directive is malformed.
	204	*/
	205	static void obj_bout_stab(what)
	206	int what;
	207	{
a39116f1 RP	208	register symbolS * symbolP = 0;
	209	register char * string;
	210	int saved_type = 0;
	211	int length;
	212	int goof; /* TRUE if we have aborted. */
	213	long longint;
	214
	215	/*
	216	* Enter with input_line_pointer pointing past .stabX and any following
	217	* whitespace.
	218	*/
fecd2382 RP	219	goof = 0; /* JF who forgot this?? */
	220	if (what == 's') {
	221	string = demand_copy_C_string(& length);
	222	SKIP_WHITESPACE();
	223	if (*input_line_pointer == ',')
a39116f1	224	input_line_pointer ++;
fecd2382 RP	225	else {
	226	as_bad("I need a comma after symbol's name");
	227	goof = 1;
	228	}
	229	} else
a39116f1 RP	230	string = "";
	231
	232	/*
	233	* Input_line_pointer->after ','. String->symbol name.
	234	*/
fecd2382 RP	235	if (!goof) {
	236	symbolP = symbol_new(string,
	237	SEG_UNKNOWN,
	238	0,
	239	(struct frag *)0);
	240	switch (what) {
	241	case 'd':
	242	S_SET_NAME(symbolP,NULL); /* .stabd feature. */
	243	S_SET_VALUE(symbolP,obstack_next_free(&frags) -
	244	frag_now->fr_literal);
	245	symbolP->sy_frag = frag_now;
	246	break;
a39116f1	247
fecd2382 RP	248	case 'n':
	249	symbolP->sy_frag = &zero_address_frag;
	250	break;
a39116f1	251
fecd2382 RP	252	case 's':
	253	symbolP->sy_frag = & zero_address_frag;
	254	break;
a39116f1	255
fecd2382 RP	256	default:
	257	BAD_CASE(what);
	258	break;
	259	}
	260	if (get_absolute_expression_and_terminator(& longint) == ',')
a39116f1	261	symbolP->sy_symbol.n_type = saved_type = longint;
fecd2382 RP	262	else {
	263	as_bad("I want a comma after the n_type expression");
	264	goof = 1;
	265	input_line_pointer--; /* Backup over a non-',' char. */
	266	}
	267	}
	268	if (! goof) {
	269	if (get_absolute_expression_and_terminator (& longint) == ',')
a39116f1	270	S_SET_OTHER(symbolP,longint);
fecd2382 RP	271	else {
	272	as_bad("I want a comma after the n_other expression");
	273	goof = 1;
	274	input_line_pointer--; /* Backup over a non-',' char. */
	275	}
	276	}
	277	if (! goof) {
	278	S_SET_DESC(symbolP, get_absolute_expression ());
	279	if (what == 's' \|\| what == 'n') {
	280	if (* input_line_pointer != ',') {
	281	as_bad("I want a comma after the n_desc expression");
	282	goof = 1;
	283	} else {
	284	input_line_pointer ++;
	285	}
	286	}
	287	}
	288	if ((! goof) && (what=='s' \|\| what=='n')) {
	289	pseudo_set(symbolP);
	290	symbolP->sy_symbol.n_type = saved_type;
	291	}
86c094f2	292	#ifndef NO_LISTING
a39116f1 RP	293	{
	294	extern int listing;
	295
	296	if (listing && !goof)
	297	{
	298	if (symbolP->sy_symbol.n_type == N_SLINE)
	299	{
	300
	301	listing_source_line(symbolP->sy_symbol.n_desc);
	302	}
	303	else if (symbolP->sy_symbol.n_type == N_SO
	304	\|\| symbolP->sy_symbol.n_type == N_SOL)
	305	{
	306	listing_source_file(string);
	307	}
	308	}
	309	}
	310
86c094f2	311	#endif
a39116f1	312
fecd2382	313	if (goof)
a39116f1	314	ignore_rest_of_line ();
fecd2382	315	else
a39116f1	316	demand_empty_rest_of_line ();
fecd2382 RP	317	} /* obj_bout_stab() */
	318
	319	static void obj_bout_desc() {
	320	register char *name;
	321	register char c;
	322	register char *p;
	323	register symbolS * symbolP;
	324	register int temp;
a39116f1	325
fecd2382 RP	326	/*
	327	* Frob invented at RMS' request. Set the n_desc of a symbol.
	328	*/
	329	name = input_line_pointer;
	330	c = get_symbol_end();
	331	p = input_line_pointer;
	332	* p = c;
	333	SKIP_WHITESPACE();
	334	if (*input_line_pointer != ',') {
	335	*p = 0;
	336	as_bad("Expected comma after name \"%s\"", name);
	337	*p = c;
	338	ignore_rest_of_line();
	339	} else {
	340	input_line_pointer ++;
	341	temp = get_absolute_expression ();
	342	*p = 0;
	343	symbolP = symbol_find_or_make(name);
	344	*p = c;
	345	S_SET_DESC(symbolP,temp);
	346	}
	347	demand_empty_rest_of_line();
	348	} /* obj_bout_desc() */
	349
	350	void obj_read_begin_hook() {
	351	return;
	352	} /* obj_read_begin_hook() */
	353
	354	void obj_crawl_symbol_chain(headers)
	355	object_headers *headers;
	356	{
	357	symbolS **symbolPP;
	358	symbolS *symbolP;
	359	int symbol_number = 0;
a39116f1	360
fecd2382 RP	361	/* JF deal with forward references first... */
	362	for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	363	if (symbolP->sy_forward) {
	364	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP)
	365	+ S_GET_VALUE(symbolP->sy_forward)
	366	+ symbolP->sy_forward->sy_frag->fr_address);
a39116f1	367
fecd2382 RP	368	symbolP->sy_forward=0;
	369	} /* if it has a forward reference */
	370	} /* walk the symbol chain */
a39116f1	371
fecd2382	372	tc_crawl_symbol_chain(headers);
a39116f1	373
fecd2382 RP	374	symbolPP = & symbol_rootP; /->last symbol chain link. /
	375	while ((symbolP = *symbolPP) != NULL) {
	376	if (flagseen['R'] && (S_GET_SEGMENT(symbolP) == SEG_DATA)) {
	377	S_SET_SEGMENT(symbolP, SEG_TEXT);
	378	} /* if pusing data into text */
a39116f1	379
fecd2382	380	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP) + symbolP->sy_frag->fr_address);
a39116f1	381
fecd2382 RP	382	/* OK, here is how we decide which symbols go out into the
fecd2382 RP	383	brave new symtab. Symbols that do are:
a39116f1	384
fecd2382 RP	385	* symbols with no name (stabd's?)
fecd2382 RP	386	* symbols with debug info in their N_TYPE
a39116f1	387
fecd2382 RP	388	Symbols that don't are:
	389	* symbols that are registers
	390	* symbols with \1 as their 3rd character (numeric labels)
	391	* "local labels" as defined by S_LOCAL_NAME(name)
	392	if the -L switch was passed to gas.
a39116f1	393
fecd2382 RP	394	All other symbols are output. We complain if a deleted
fecd2382 RP	395	symbol was marked external. */
a39116f1 RP	396
a39116f1 RP	397
fecd2382 RP	398	if (1
	399	&& !S_IS_REGISTER(symbolP)
	400	&& (!S_GET_NAME(symbolP)
	401	\|\| S_IS_DEBUG(symbolP)
	402	#ifdef TC_I960
	403	/* FIXME-SOON this ifdef seems highly dubious to me. xoxorich. */
	404	\|\| !S_IS_DEFINED(symbolP)
	405	\|\| S_IS_EXTERNAL(symbolP)
	406	#endif /* TC_I960 */
	407	\|\| (S_GET_NAME(symbolP)[0] != '\001' && (flagseen ['L'] \|\| ! S_LOCAL_NAME(symbolP))))) {
	408	symbolP->sy_number = symbol_number++;
a39116f1	409
fecd2382 RP	410	/* The + 1 after strlen account for the \0 at the
	411	end of each string */
	412	if (!S_IS_STABD(symbolP)) {
	413	/* Ordinary case. */
	414	symbolP->sy_name_offset = string_byte_count;
	415	string_byte_count += strlen(S_GET_NAME(symbolP)) + 1;
	416	}
	417	else /* .Stabd case. */
	418	symbolP->sy_name_offset = 0;
	419	symbolPP = &(symbol_next(symbolP));
	420	} else {
	421	if (S_IS_EXTERNAL(symbolP) \|\| !S_IS_DEFINED(symbolP)) {
	422	as_bad("Local symbol %s never defined", S_GET_NAME(symbolP));
	423	} /* oops. */
a39116f1	424
fecd2382 RP	425	/* Unhook it from the chain */
	426	*symbolPP = symbol_next(symbolP);
	427	} /* if this symbol should be in the output */
	428	} /* for each symbol */
a39116f1	429
fecd2382	430	H_SET_SYMBOL_TABLE_SIZE(headers, symbol_number);
a39116f1	431
fecd2382 RP	432	return;
	433	} /* obj_crawl_symbol_chain() */
	434
	435	/*
	436	* Find strings by crawling along symbol table chain.
	437	*/
	438
	439	void obj_emit_strings(where)
	440	char **where;
	441	{
	442	symbolS *symbolP;
a39116f1	443
3cc6716d	444	#ifdef CROSS_COMPILE
fecd2382 RP	445	/* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
	446	md_number_to_chars(*where, string_byte_count, sizeof(string_byte_count));
	447	*where += sizeof(string_byte_count);
3cc6716d	448	#else /* CROSS_COMPILE */
fecd2382	449	append(where, (char *) &string_byte_count, (unsigned long) sizeof(string_byte_count));
3cc6716d	450	#endif /* CROSS_COMPILE */
a39116f1	451
fecd2382 RP	452	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	453	if(S_GET_NAME(symbolP))
	454	append(where, S_GET_NAME(symbolP), (unsigned long)(strlen (S_GET_NAME(symbolP)) + 1));
	455	} /* walk symbol chain */
a39116f1	456
fecd2382 RP	457	return;
	458	} /* obj_emit_strings() */
	459
	460	/*
	461	* Local Variables:
	462	* comment-column: 0
	463	* fill-column: 131
	464	* End:
	465	*/
	466
	467	/* end of obj-bout.c */