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

/* b.out object file format
   Copyright (C) 1989, 1990, 1991 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. */

/* $Id$ */

#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,
};

#ifdef __STDC__
static void obj_bout_stab(int what);
static void obj_bout_line(void);
static void obj_bout_desc(void);
#else /* __STDC__ */
static void obj_bout_desc();
static void obj_bout_stab();
static void obj_bout_line();
#endif /* __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 RP	1	/* b.out object file format
fecd2382 RP	2	Copyright (C) 1989, 1990, 1991 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 RP	19
	20	/* $Id$ */
	21
	22	#include "as.h"
	23	#include "obstack.h"
86c094f2	24	#include "aout/stab_gnu.h"
fecd2382	25	const short /* in: segT out: N_TYPE bits */
a39116f1 RP	26	seg_N_TYPE[] = {
	27	N_ABS,
	28	N_TEXT,
	29	N_DATA,
	30	N_BSS,
	31	N_UNDF, /* unknown */
	32	N_UNDF, /* absent */
	33	N_UNDF, /* pass1 */
	34	N_UNDF, /* error */
	35	N_UNDF, /* bignum/flonum */
	36	N_UNDF, /* difference */
	37	N_REGISTER, /* register */
	38	};
fecd2382 RP	39
	40	const segT N_TYPE_seg [N_TYPE+2] = { /* N_TYPE == 0x1E = 32-2 */
	41	SEG_UNKNOWN, /* N_UNDF == 0 */
	42	SEG_GOOF,
	43	SEG_ABSOLUTE, /* N_ABS == 2 */
	44	SEG_GOOF,
	45	SEG_TEXT, /* N_TEXT == 4 */
	46	SEG_GOOF,
	47	SEG_DATA, /* N_DATA == 6 */
	48	SEG_GOOF,
	49	SEG_BSS, /* N_BSS == 8 */
	50	SEG_GOOF,
	51	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	52	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	53	SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
	54	SEG_REGISTER, /* dummy N_REGISTER for regs = 30 */
	55	SEG_GOOF,
	56	};
	57
	58	#ifdef __STDC__
	59	static void obj_bout_stab(int what);
	60	static void obj_bout_line(void);
	61	static void obj_bout_desc(void);
	62	#else /* __STDC__ */
	63	static void obj_bout_desc();
	64	static void obj_bout_stab();
	65	static void obj_bout_line();
	66	#endif /* __STDC__ */
	67
	68	const pseudo_typeS obj_pseudo_table[] = {
a39116f1	69	/* stabs (aka a.out aka b.out directives for debug symbols) */
fecd2382 RP	70	{ "desc", obj_bout_desc, 0 }, /* def */
	71	{ "line", obj_bout_line, 0 }, /* source code line number */
	72	{ "stabd", obj_bout_stab, 'd' }, /* stabs */
	73	{ "stabn", obj_bout_stab, 'n' }, /* stabs */
	74	{ "stabs", obj_bout_stab, 's' }, /* stabs */
a39116f1 RP	75
a39116f1 RP	76	/* coff debugging directives. Currently ignored silently */
fecd2382 RP	77	{ "def", s_ignore, 0 },
	78	{ "dim", s_ignore, 0 },
	79	{ "endef", s_ignore, 0 },
	80	{ "ln", s_ignore, 0 },
	81	{ "scl", s_ignore, 0 },
	82	{ "size", s_ignore, 0 },
	83	{ "tag", s_ignore, 0 },
	84	{ "type", s_ignore, 0 },
	85	{ "val", s_ignore, 0 },
a39116f1 RP	86
a39116f1 RP	87	/* other stuff we don't handle */
fecd2382 RP	88	{ "ABORT", s_ignore, 0 },
fecd2382 RP	89	{ "ident", s_ignore, 0 },
a39116f1	90
fecd2382 RP	91	{ NULL} /* end sentinel */
	92	}; /* obj_pseudo_table */
	93
	94	/* Relocation. */
	95
fecd2382 RP	96	/*
	97	* emit_relocations()
	98	*
	99	* Crawl along a fixS chain. Emit the segment's relocations.
	100	*/
	101	void obj_emit_relocations(where, fixP, segment_address_in_file)
	102	char **where;
	103	fixS fixP; / Fixup chain for this segment. */
	104	relax_addressT segment_address_in_file;
	105	{
a79c6033 RP	106	for (; fixP; fixP = fixP->fx_next) {
	107	if (fixP->fx_addsy != NULL) {
	108	tc_bout_fix_to_chars(*where, fixP, segment_address_in_file);
b97ea9ed	109	*where += sizeof(struct relocation_info);
a79c6033 RP	110	} /* if there's a symbol */
a79c6033 RP	111	} /* for each fixup */
a39116f1	112
fecd2382 RP	113	} /* emit_relocations() */
	114
	115	/* Aout file generation & utilities */
	116
	117	/* Convert a lvalue to machine dependent data */
	118	void obj_header_append(where, headers)
	119	char **where;
	120	object_headers *headers;
	121	{
	122	/* Always leave in host byte order */
a39116f1	123
fecd2382	124	headers->header.a_talign = section_alignment[SEG_TEXT];
a39116f1	125
fecd2382 RP	126	if (headers->header.a_talign < 2){
	127	headers->header.a_talign = 2;
	128	} /* force to at least 2 */
a39116f1	129
fecd2382 RP	130	headers->header.a_dalign = section_alignment[SEG_DATA];
fecd2382 RP	131	headers->header.a_balign = section_alignment[SEG_BSS];
a39116f1	132
fecd2382	133	headers->header.a_tload = 0;
a79c6033	134	headers->header.a_dload = md_section_align(SEG_DATA, H_GET_TEXT_SIZE(headers));
a39116f1	135
fecd2382 RP	136	append(where, (char *) &headers->header, sizeof(headers->header));
	137	} /* a_header_append() */
	138
	139	void obj_symbol_to_chars(where, symbolP)
	140	char **where;
	141	symbolS *symbolP;
	142	{
a39116f1	143	/* leave in host byte order */
fecd2382 RP	144	append(where, (char *)&symbolP->sy_symbol, sizeof(obj_symbol_type));
	145	} /* obj_symbol_to_chars() */
	146
	147	void obj_emit_symbols(where, symbol_rootP)
	148	char **where;
	149	symbolS *symbol_rootP;
	150	{
a39116f1 RP	151	symbolS * symbolP;
	152
	153	/*
	154	* Emit all symbols left in the symbol chain.
	155	*/
	156	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	157	/* Used to save the offset of the name. It is used to point
	158	to the string in memory but must be a file offset. */
	159	char *temp;
	160
	161	temp = S_GET_NAME(symbolP);
	162	S_SET_OFFSET(symbolP, symbolP->sy_name_offset);
	163
	164	/* Any symbol still undefined and is not a dbg symbol is made N_EXT. */
	165	if (!S_IS_DEBUG(symbolP) && !S_IS_DEFINED(symbolP)) S_SET_EXTERNAL(symbolP);
	166
	167	obj_symbol_to_chars(where, symbolP);
	168	S_SET_NAME(symbolP,temp);
	169	}
fecd2382 RP	170	} /* emit_symbols() */
	171
	172	void obj_symbol_new_hook(symbolP)
	173	symbolS *symbolP;
	174	{
	175	S_SET_OTHER(symbolP, 0);
	176	S_SET_DESC(symbolP, 0);
	177	return;
	178	} /* obj_symbol_new_hook() */
	179
	180	static void obj_bout_line() {
	181	/* Assume delimiter is part of expression. */
	182	/* BSD4.2 as fails with delightful bug, so we */
	183	/* are not being incompatible here. */
	184	new_logical_line ((char *)NULL, (int)(get_absolute_expression ()));
	185	demand_empty_rest_of_line();
	186	} /* obj_bout_line() */
	187
	188	/*
	189	* stab()
	190	*
	191	* Handle .stabX directives, which used to be open-coded.
	192	* So much creeping featurism overloaded the semantics that we decided
	193	* to put all .stabX thinking in one place. Here.
	194	*
	195	* We try to make any .stabX directive legal. Other people's AS will often
	196	* do assembly-time consistency checks: eg assigning meaning to n_type bits
	197	* and "protecting" you from setting them to certain values. (They also zero
	198	* certain bits before emitting symbols. Tut tut.)
	199	*
	200	* If an expression is not absolute we either gripe or use the relocation
	201	* information. Other people's assemblers silently forget information they
	202	* don't need and invent information they need that you didn't supply.
	203	*
	204	* .stabX directives always make a symbol table entry. It may be junk if
	205	* the rest of your .stabX directive is malformed.
	206	*/
	207	static void obj_bout_stab(what)
	208	int what;
	209	{
a39116f1 RP	210	register symbolS * symbolP = 0;
	211	register char * string;
	212	int saved_type = 0;
	213	int length;
	214	int goof; /* TRUE if we have aborted. */
	215	long longint;
	216
	217	/*
	218	* Enter with input_line_pointer pointing past .stabX and any following
	219	* whitespace.
	220	*/
fecd2382 RP	221	goof = 0; /* JF who forgot this?? */
	222	if (what == 's') {
	223	string = demand_copy_C_string(& length);
	224	SKIP_WHITESPACE();
	225	if (*input_line_pointer == ',')
a39116f1	226	input_line_pointer ++;
fecd2382 RP	227	else {
	228	as_bad("I need a comma after symbol's name");
	229	goof = 1;
	230	}
	231	} else
a39116f1 RP	232	string = "";
	233
	234	/*
	235	* Input_line_pointer->after ','. String->symbol name.
	236	*/
fecd2382 RP	237	if (!goof) {
	238	symbolP = symbol_new(string,
	239	SEG_UNKNOWN,
	240	0,
	241	(struct frag *)0);
	242	switch (what) {
	243	case 'd':
	244	S_SET_NAME(symbolP,NULL); /* .stabd feature. */
	245	S_SET_VALUE(symbolP,obstack_next_free(&frags) -
	246	frag_now->fr_literal);
	247	symbolP->sy_frag = frag_now;
	248	break;
a39116f1	249
fecd2382 RP	250	case 'n':
	251	symbolP->sy_frag = &zero_address_frag;
	252	break;
a39116f1	253
fecd2382 RP	254	case 's':
	255	symbolP->sy_frag = & zero_address_frag;
	256	break;
a39116f1	257
fecd2382 RP	258	default:
	259	BAD_CASE(what);
	260	break;
	261	}
	262	if (get_absolute_expression_and_terminator(& longint) == ',')
a39116f1	263	symbolP->sy_symbol.n_type = saved_type = longint;
fecd2382 RP	264	else {
	265	as_bad("I want a comma after the n_type expression");
	266	goof = 1;
	267	input_line_pointer--; /* Backup over a non-',' char. */
	268	}
	269	}
	270	if (! goof) {
	271	if (get_absolute_expression_and_terminator (& longint) == ',')
a39116f1	272	S_SET_OTHER(symbolP,longint);
fecd2382 RP	273	else {
	274	as_bad("I want a comma after the n_other expression");
	275	goof = 1;
	276	input_line_pointer--; /* Backup over a non-',' char. */
	277	}
	278	}
	279	if (! goof) {
	280	S_SET_DESC(symbolP, get_absolute_expression ());
	281	if (what == 's' \|\| what == 'n') {
	282	if (* input_line_pointer != ',') {
	283	as_bad("I want a comma after the n_desc expression");
	284	goof = 1;
	285	} else {
	286	input_line_pointer ++;
	287	}
	288	}
	289	}
	290	if ((! goof) && (what=='s' \|\| what=='n')) {
	291	pseudo_set(symbolP);
	292	symbolP->sy_symbol.n_type = saved_type;
	293	}
86c094f2	294	#ifndef NO_LISTING
a39116f1 RP	295	{
	296	extern int listing;
	297
	298	if (listing && !goof)
	299	{
	300	if (symbolP->sy_symbol.n_type == N_SLINE)
	301	{
	302
	303	listing_source_line(symbolP->sy_symbol.n_desc);
	304	}
	305	else if (symbolP->sy_symbol.n_type == N_SO
	306	\|\| symbolP->sy_symbol.n_type == N_SOL)
	307	{
	308	listing_source_file(string);
	309	}
	310	}
	311	}
	312
86c094f2	313	#endif
a39116f1	314
fecd2382	315	if (goof)
a39116f1	316	ignore_rest_of_line ();
fecd2382	317	else
a39116f1	318	demand_empty_rest_of_line ();
fecd2382 RP	319	} /* obj_bout_stab() */
	320
	321	static void obj_bout_desc() {
	322	register char *name;
	323	register char c;
	324	register char *p;
	325	register symbolS * symbolP;
	326	register int temp;
a39116f1	327
fecd2382 RP	328	/*
	329	* Frob invented at RMS' request. Set the n_desc of a symbol.
	330	*/
	331	name = input_line_pointer;
	332	c = get_symbol_end();
	333	p = input_line_pointer;
	334	* p = c;
	335	SKIP_WHITESPACE();
	336	if (*input_line_pointer != ',') {
	337	*p = 0;
	338	as_bad("Expected comma after name \"%s\"", name);
	339	*p = c;
	340	ignore_rest_of_line();
	341	} else {
	342	input_line_pointer ++;
	343	temp = get_absolute_expression ();
	344	*p = 0;
	345	symbolP = symbol_find_or_make(name);
	346	*p = c;
	347	S_SET_DESC(symbolP,temp);
	348	}
	349	demand_empty_rest_of_line();
	350	} /* obj_bout_desc() */
	351
	352	void obj_read_begin_hook() {
	353	return;
	354	} /* obj_read_begin_hook() */
	355
	356	void obj_crawl_symbol_chain(headers)
	357	object_headers *headers;
	358	{
	359	symbolS **symbolPP;
	360	symbolS *symbolP;
	361	int symbol_number = 0;
a39116f1	362
fecd2382 RP	363	/* JF deal with forward references first... */
	364	for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	365	if (symbolP->sy_forward) {
	366	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP)
	367	+ S_GET_VALUE(symbolP->sy_forward)
	368	+ symbolP->sy_forward->sy_frag->fr_address);
a39116f1	369
fecd2382 RP	370	symbolP->sy_forward=0;
	371	} /* if it has a forward reference */
	372	} /* walk the symbol chain */
a39116f1	373
fecd2382	374	tc_crawl_symbol_chain(headers);
a39116f1	375
fecd2382 RP	376	symbolPP = & symbol_rootP; /->last symbol chain link. /
	377	while ((symbolP = *symbolPP) != NULL) {
	378	if (flagseen['R'] && (S_GET_SEGMENT(symbolP) == SEG_DATA)) {
	379	S_SET_SEGMENT(symbolP, SEG_TEXT);
	380	} /* if pusing data into text */
a39116f1	381
fecd2382	382	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP) + symbolP->sy_frag->fr_address);
a39116f1	383
fecd2382 RP	384	/* OK, here is how we decide which symbols go out into the
fecd2382 RP	385	brave new symtab. Symbols that do are:
a39116f1	386
fecd2382 RP	387	* symbols with no name (stabd's?)
fecd2382 RP	388	* symbols with debug info in their N_TYPE
a39116f1	389
fecd2382 RP	390	Symbols that don't are:
	391	* symbols that are registers
	392	* symbols with \1 as their 3rd character (numeric labels)
	393	* "local labels" as defined by S_LOCAL_NAME(name)
	394	if the -L switch was passed to gas.
a39116f1	395
fecd2382 RP	396	All other symbols are output. We complain if a deleted
fecd2382 RP	397	symbol was marked external. */
a39116f1 RP	398
a39116f1 RP	399
fecd2382 RP	400	if (1
	401	&& !S_IS_REGISTER(symbolP)
	402	&& (!S_GET_NAME(symbolP)
	403	\|\| S_IS_DEBUG(symbolP)
	404	#ifdef TC_I960
	405	/* FIXME-SOON this ifdef seems highly dubious to me. xoxorich. */
	406	\|\| !S_IS_DEFINED(symbolP)
	407	\|\| S_IS_EXTERNAL(symbolP)
	408	#endif /* TC_I960 */
	409	\|\| (S_GET_NAME(symbolP)[0] != '\001' && (flagseen ['L'] \|\| ! S_LOCAL_NAME(symbolP))))) {
	410	symbolP->sy_number = symbol_number++;
a39116f1	411
fecd2382 RP	412	/* The + 1 after strlen account for the \0 at the
	413	end of each string */
	414	if (!S_IS_STABD(symbolP)) {
	415	/* Ordinary case. */
	416	symbolP->sy_name_offset = string_byte_count;
	417	string_byte_count += strlen(S_GET_NAME(symbolP)) + 1;
	418	}
	419	else /* .Stabd case. */
	420	symbolP->sy_name_offset = 0;
	421	symbolPP = &(symbol_next(symbolP));
	422	} else {
	423	if (S_IS_EXTERNAL(symbolP) \|\| !S_IS_DEFINED(symbolP)) {
	424	as_bad("Local symbol %s never defined", S_GET_NAME(symbolP));
	425	} /* oops. */
a39116f1	426
fecd2382 RP	427	/* Unhook it from the chain */
	428	*symbolPP = symbol_next(symbolP);
	429	} /* if this symbol should be in the output */
	430	} /* for each symbol */
a39116f1	431
fecd2382	432	H_SET_SYMBOL_TABLE_SIZE(headers, symbol_number);
a39116f1	433
fecd2382 RP	434	return;
	435	} /* obj_crawl_symbol_chain() */
	436
	437	/*
	438	* Find strings by crawling along symbol table chain.
	439	*/
	440
	441	void obj_emit_strings(where)
	442	char **where;
	443	{
	444	symbolS *symbolP;
a39116f1	445
3cc6716d	446	#ifdef CROSS_COMPILE
fecd2382 RP	447	/* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
	448	md_number_to_chars(*where, string_byte_count, sizeof(string_byte_count));
	449	*where += sizeof(string_byte_count);
3cc6716d	450	#else /* CROSS_COMPILE */
fecd2382	451	append(where, (char *) &string_byte_count, (unsigned long) sizeof(string_byte_count));
3cc6716d	452	#endif /* CROSS_COMPILE */
a39116f1	453
fecd2382 RP	454	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
	455	if(S_GET_NAME(symbolP))
	456	append(where, S_GET_NAME(symbolP), (unsigned long)(strlen (S_GET_NAME(symbolP)) + 1));
	457	} /* walk symbol chain */
a39116f1	458
fecd2382 RP	459	return;
	460	} /* obj_emit_strings() */
	461
	462	/*
	463	* Local Variables:
	464	* comment-column: 0
	465	* fill-column: 131
	466	* End:
	467	*/
	468
	469	/* end of obj-bout.c */