[binutils.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 1,
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"

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. */

/*
 * In: length of relocation (or of address) in chars: 1, 2 or 4.
 * Out: GNU LD relocation length code: 0, 1, or 2.
 */

static unsigned char
nbytes_r_length [] = {
  42, 0, 1, 42, 2
  };

/*
 *		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;
{
	struct reloc_info_generic	ri;
	register symbolS *		symbolP;
	
	/* If a machine dependent emitter is needed, call it instead. */
	if (md_emit_relocations) {
		(*md_emit_relocations) (fixP, segment_address_in_file);
		return;
	}
	
	
	/* JF this is for paranoia */
	bzero((char *)&ri,sizeof(ri));
	for (;  fixP;  fixP = fixP->fx_next) {
		if ((symbolP = fixP->fx_addsy) != 0) {
			ri . r_bsr		= fixP->fx_bsr;
			ri . r_disp		= fixP->fx_im_disp;
			ri . r_callj		= fixP->fx_callj;
			ri . r_length		= nbytes_r_length [fixP->fx_size];
			ri . r_pcrel		= fixP->fx_pcrel;
			ri . r_address	= fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file;
			
			if (S_GET_TYPE(symbolP) == N_UNDF) {
				ri . r_extern	= 1;
				ri . r_symbolnum	= symbolP->sy_number;
			} else {
				ri . r_extern	= 0;
				ri . r_symbolnum	= S_GET_TYPE(symbolP);
			}
			
			/* Output the relocation information in machine-dependent form. */
			md_ri_to_chars(*where, &ri);
			*where += md_reloc_size;
		}
	}
} /* 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, headers->header.a_text);

	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;
	}
	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_ASSEMBLE
	/* 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_ASSEMBLE */
	append(where, (char *) &string_byte_count, (unsigned long) sizeof(string_byte_count));
#endif /* CROSS_ASSEMBLE */

	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
	2	Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
	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 1,
	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. */
	19
	20	/* $Id$ */
	21
	22	#include "as.h"
	23	#include "obstack.h"
	24
	25	const short /* in: segT out: N_TYPE bits */
	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	};
	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[] = {
69	/* stabs (aka a.out aka b.out directives for debug symbols) */
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 */
75
76	/* coff debugging directives. Currently ignored silently */
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 },
86
87	/* other stuff we don't handle */
88	{ "ABORT", s_ignore, 0 },
89	{ "ident", s_ignore, 0 },
90
91	{ NULL} /* end sentinel */
92	}; /* obj_pseudo_table */
93
94	/* Relocation. */
95
96	/*
97	* In: length of relocation (or of address) in chars: 1, 2 or 4.
98	* Out: GNU LD relocation length code: 0, 1, or 2.
99	*/
100
101	static unsigned char
102	nbytes_r_length [] = {
103	42, 0, 1, 42, 2
104	};
105
106	/*
107	* emit_relocations()
108	*
109	* Crawl along a fixS chain. Emit the segment's relocations.
110	*/
111	void obj_emit_relocations(where, fixP, segment_address_in_file)
112	char **where;
113	fixS fixP; / Fixup chain for this segment. */
114	relax_addressT segment_address_in_file;
115	{
116	struct reloc_info_generic ri;
117	register symbolS * symbolP;
118
119	/* If a machine dependent emitter is needed, call it instead. */
120	if (md_emit_relocations) {
121	(*md_emit_relocations) (fixP, segment_address_in_file);
122	return;
123	}
124
125
126	/* JF this is for paranoia */
127	bzero((char *)&ri,sizeof(ri));
128	for (; fixP; fixP = fixP->fx_next) {
129	if ((symbolP = fixP->fx_addsy) != 0) {
130	ri . r_bsr = fixP->fx_bsr;
131	ri . r_disp = fixP->fx_im_disp;
132	ri . r_callj = fixP->fx_callj;
133	ri . r_length = nbytes_r_length [fixP->fx_size];
134	ri . r_pcrel = fixP->fx_pcrel;
135	ri . r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file;
136
137	if (S_GET_TYPE(symbolP) == N_UNDF) {
138	ri . r_extern = 1;
139	ri . r_symbolnum = symbolP->sy_number;
140	} else {
141	ri . r_extern = 0;
142	ri . r_symbolnum = S_GET_TYPE(symbolP);
143	}
144
145	/* Output the relocation information in machine-dependent form. */
146	md_ri_to_chars(*where, &ri);
147	*where += md_reloc_size;
148	}
149	}
150	} /* emit_relocations() */
151
152	/* Aout file generation & utilities */
153
154	/* Convert a lvalue to machine dependent data */
155	void obj_header_append(where, headers)
156	char **where;
157	object_headers *headers;
158	{
159	/* Always leave in host byte order */
160
161	headers->header.a_talign = section_alignment[SEG_TEXT];
162
163	if (headers->header.a_talign < 2){
164	headers->header.a_talign = 2;
165	} /* force to at least 2 */
166
167	headers->header.a_dalign = section_alignment[SEG_DATA];
168	headers->header.a_balign = section_alignment[SEG_BSS];
169
170	headers->header.a_tload = 0;
171	headers->header.a_dload = md_section_align(SEG_DATA, headers->header.a_text);
172
173	append(where, (char *) &headers->header, sizeof(headers->header));
174	} /* a_header_append() */
175
176	void obj_symbol_to_chars(where, symbolP)
177	char **where;
178	symbolS *symbolP;
179	{
180	/* leave in host byte order */
181	append(where, (char *)&symbolP->sy_symbol, sizeof(obj_symbol_type));
182	} /* obj_symbol_to_chars() */
183
184	void obj_emit_symbols(where, symbol_rootP)
185	char **where;
186	symbolS *symbol_rootP;
187	{
188	symbolS * symbolP;
189
190	/*
191	* Emit all symbols left in the symbol chain.
192	*/
193	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
194	/* Used to save the offset of the name. It is used to point
195	to the string in memory but must be a file offset. */
196	char *temp;
197
198	temp = S_GET_NAME(symbolP);
199	S_SET_OFFSET(symbolP, symbolP->sy_name_offset);
200
201	/* Any symbol still undefined and is not a dbg symbol is made N_EXT. */
202	if (!S_IS_DEBUG(symbolP) && !S_IS_DEFINED(symbolP)) S_SET_EXTERNAL(symbolP);
203
204	obj_symbol_to_chars(where, symbolP);
205	S_SET_NAME(symbolP,temp);
206	}
207	} /* emit_symbols() */
208
209	void obj_symbol_new_hook(symbolP)
210	symbolS *symbolP;
211	{
212	S_SET_OTHER(symbolP, 0);
213	S_SET_DESC(symbolP, 0);
214	return;
215	} /* obj_symbol_new_hook() */
216
217	static void obj_bout_line() {
218	/* Assume delimiter is part of expression. */
219	/* BSD4.2 as fails with delightful bug, so we */
220	/* are not being incompatible here. */
221	new_logical_line ((char *)NULL, (int)(get_absolute_expression ()));
222	demand_empty_rest_of_line();
223	} /* obj_bout_line() */
224
225	/*
226	* stab()
227	*
228	* Handle .stabX directives, which used to be open-coded.
229	* So much creeping featurism overloaded the semantics that we decided
230	* to put all .stabX thinking in one place. Here.
231	*
232	* We try to make any .stabX directive legal. Other people's AS will often
233	* do assembly-time consistency checks: eg assigning meaning to n_type bits
234	* and "protecting" you from setting them to certain values. (They also zero
235	* certain bits before emitting symbols. Tut tut.)
236	*
237	* If an expression is not absolute we either gripe or use the relocation
238	* information. Other people's assemblers silently forget information they
239	* don't need and invent information they need that you didn't supply.
240	*
241	* .stabX directives always make a symbol table entry. It may be junk if
242	* the rest of your .stabX directive is malformed.
243	*/
244	static void obj_bout_stab(what)
245	int what;
246	{
247	register symbolS * symbolP = 0;
248	register char * string;
249	int saved_type = 0;
250	int length;
251	int goof; /* TRUE if we have aborted. */
252	long longint;
253
254	/*
255	* Enter with input_line_pointer pointing past .stabX and any following
256	* whitespace.
257	*/
258	goof = 0; /* JF who forgot this?? */
259	if (what == 's') {
260	string = demand_copy_C_string(& length);
261	SKIP_WHITESPACE();
262	if (*input_line_pointer == ',')
263	input_line_pointer ++;
264	else {
265	as_bad("I need a comma after symbol's name");
266	goof = 1;
267	}
268	} else
269	string = "";
270
271	/*
272	* Input_line_pointer->after ','. String->symbol name.
273	*/
274	if (!goof) {
275	symbolP = symbol_new(string,
276	SEG_UNKNOWN,
277	0,
278	(struct frag *)0);
279	switch (what) {
280	case 'd':
281	S_SET_NAME(symbolP,NULL); /* .stabd feature. */
282	S_SET_VALUE(symbolP,obstack_next_free(&frags) -
283	frag_now->fr_literal);
284	symbolP->sy_frag = frag_now;
285	break;
286
287	case 'n':
288	symbolP->sy_frag = &zero_address_frag;
289	break;
290
291	case 's':
292	symbolP->sy_frag = & zero_address_frag;
293	break;
294
295	default:
296	BAD_CASE(what);
297	break;
298	}
299	if (get_absolute_expression_and_terminator(& longint) == ',')
300	symbolP->sy_symbol.n_type = saved_type = longint;
301	else {
302	as_bad("I want a comma after the n_type expression");
303	goof = 1;
304	input_line_pointer--; /* Backup over a non-',' char. */
305	}
306	}
307	if (! goof) {
308	if (get_absolute_expression_and_terminator (& longint) == ',')
309	S_SET_OTHER(symbolP,longint);
310	else {
311	as_bad("I want a comma after the n_other expression");
312	goof = 1;
313	input_line_pointer--; /* Backup over a non-',' char. */
314	}
315	}
316	if (! goof) {
317	S_SET_DESC(symbolP, get_absolute_expression ());
318	if (what == 's' \|\| what == 'n') {
319	if (* input_line_pointer != ',') {
320	as_bad("I want a comma after the n_desc expression");
321	goof = 1;
322	} else {
323	input_line_pointer ++;
324	}
325	}
326	}
327	if ((! goof) && (what=='s' \|\| what=='n')) {
328	pseudo_set(symbolP);
329	symbolP->sy_symbol.n_type = saved_type;
330	}
331	if (goof)
332	ignore_rest_of_line ();
333	else
334	demand_empty_rest_of_line ();
335	} /* obj_bout_stab() */
336
337	static void obj_bout_desc() {
338	register char *name;
339	register char c;
340	register char *p;
341	register symbolS * symbolP;
342	register int temp;
343
344	/*
345	* Frob invented at RMS' request. Set the n_desc of a symbol.
346	*/
347	name = input_line_pointer;
348	c = get_symbol_end();
349	p = input_line_pointer;
350	* p = c;
351	SKIP_WHITESPACE();
352	if (*input_line_pointer != ',') {
353	*p = 0;
354	as_bad("Expected comma after name \"%s\"", name);
355	*p = c;
356	ignore_rest_of_line();
357	} else {
358	input_line_pointer ++;
359	temp = get_absolute_expression ();
360	*p = 0;
361	symbolP = symbol_find_or_make(name);
362	*p = c;
363	S_SET_DESC(symbolP,temp);
364	}
365	demand_empty_rest_of_line();
366	} /* obj_bout_desc() */
367
368	void obj_read_begin_hook() {
369	return;
370	} /* obj_read_begin_hook() */
371
372	void obj_crawl_symbol_chain(headers)
373	object_headers *headers;
374	{
375	symbolS **symbolPP;
376	symbolS *symbolP;
377	int symbol_number = 0;
378
379	/* JF deal with forward references first... */
380	for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
381	if (symbolP->sy_forward) {
382	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP)
383	+ S_GET_VALUE(symbolP->sy_forward)
384	+ symbolP->sy_forward->sy_frag->fr_address);
385
386	symbolP->sy_forward=0;
387	} /* if it has a forward reference */
388	} /* walk the symbol chain */
389
390	tc_crawl_symbol_chain(headers);
391
392	symbolPP = & symbol_rootP; /->last symbol chain link. /
393	while ((symbolP = *symbolPP) != NULL) {
394	if (flagseen['R'] && (S_GET_SEGMENT(symbolP) == SEG_DATA)) {
395	S_SET_SEGMENT(symbolP, SEG_TEXT);
396	} /* if pusing data into text */
397
398	S_SET_VALUE(symbolP, S_GET_VALUE(symbolP) + symbolP->sy_frag->fr_address);
399
400	/* OK, here is how we decide which symbols go out into the
401	brave new symtab. Symbols that do are:
402
403	* symbols with no name (stabd's?)
404	* symbols with debug info in their N_TYPE
405
406	Symbols that don't are:
407	* symbols that are registers
408	* symbols with \1 as their 3rd character (numeric labels)
409	* "local labels" as defined by S_LOCAL_NAME(name)
410	if the -L switch was passed to gas.
411
412	All other symbols are output. We complain if a deleted
413	symbol was marked external. */
414
415
416	if (1
417	&& !S_IS_REGISTER(symbolP)
418	&& (!S_GET_NAME(symbolP)
419	\|\| S_IS_DEBUG(symbolP)
420	#ifdef TC_I960
421	/* FIXME-SOON this ifdef seems highly dubious to me. xoxorich. */
422	\|\| !S_IS_DEFINED(symbolP)
423	\|\| S_IS_EXTERNAL(symbolP)
424	#endif /* TC_I960 */
425	\|\| (S_GET_NAME(symbolP)[0] != '\001' && (flagseen ['L'] \|\| ! S_LOCAL_NAME(symbolP))))) {
426	symbolP->sy_number = symbol_number++;
427
428	/* The + 1 after strlen account for the \0 at the
429	end of each string */
430	if (!S_IS_STABD(symbolP)) {
431	/* Ordinary case. */
432	symbolP->sy_name_offset = string_byte_count;
433	string_byte_count += strlen(S_GET_NAME(symbolP)) + 1;
434	}
435	else /* .Stabd case. */
436	symbolP->sy_name_offset = 0;
437	symbolPP = &(symbol_next(symbolP));
438	} else {
439	if (S_IS_EXTERNAL(symbolP) \|\| !S_IS_DEFINED(symbolP)) {
440	as_bad("Local symbol %s never defined", S_GET_NAME(symbolP));
441	} /* oops. */
442
443	/* Unhook it from the chain */
444	*symbolPP = symbol_next(symbolP);
445	} /* if this symbol should be in the output */
446	} /* for each symbol */
447
448	H_SET_SYMBOL_TABLE_SIZE(headers, symbol_number);
449
450	return;
451	} /* obj_crawl_symbol_chain() */
452
453	/*
454	* Find strings by crawling along symbol table chain.
455	*/
456
457	void obj_emit_strings(where)
458	char **where;
459	{
460	symbolS *symbolP;
461
462	#ifdef CROSS_ASSEMBLE
463	/* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
464	md_number_to_chars(*where, string_byte_count, sizeof(string_byte_count));
465	*where += sizeof(string_byte_count);
466	#else /* CROSS_ASSEMBLE */
467	append(where, (char *) &string_byte_count, (unsigned long) sizeof(string_byte_count));
468	#endif /* CROSS_ASSEMBLE */
469
470	for(symbolP = symbol_rootP; symbolP; symbolP = symbol_next(symbolP)) {
471	if(S_GET_NAME(symbolP))
472	append(where, S_GET_NAME(symbolP), (unsigned long)(strlen (S_GET_NAME(symbolP)) + 1));
473	} /* walk symbol chain */
474
475	return;
476	} /* obj_emit_strings() */
477
478	/*
479	* Local Variables:
480	* comment-column: 0
481	* fill-column: 131
482	* End:
483	*/
484
485	/* end of obj-bout.c */