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Symbols with octets value

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Up to now, all symbol values are in units of bytes, where a "byte" can
consist of one or more octets (e.g. 8 bit or 16 bit).

Allow to specfiy that the "unit" of a newly created symbol is octets
(exactly 8 bit), instead of bytes.

	* symbols.h (symbol_temp_new_now_octets): Declare.
	(symbol_set_value_now_octets, symbol_octets_p): Declare.
	* symbols.c (struct symbol_flags): New member sy_octets.
	(symbol_temp_new_now_octets): New function.
	(resolve_symbol_value): Return octets instead of bytes if
	sy_octets is set.
	(symbol_set_value_now_octets): New function.
	(symbol_octets_p): New function.
This commit is contained in:
Christian Eggers 2019-03-10 19:21:53 +01:00 committed by Alan Modra
parent 71250b94dc
commit d18d199917
3 changed files with 49 additions and 1 deletions
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11
gas/ChangeLog
View File

@ -1,3 +1,14 @@
2019-03-13 Christian Eggers <ceggers@gmx.de>
* symbols.h (symbol_temp_new_now_octets): Declare.
(symbol_set_value_now_octets, symbol_octets_p): Declare.
* symbols.c (struct symbol_flags): New member sy_octets.
(symbol_temp_new_now_octets): New function.
(resolve_symbol_value): Return octets instead of bytes if
sy_octets is set.
(symbol_set_value_now_octets): New function.
(symbol_octets_p): New function.
2019-03-13 Christian Eggers <ceggers@gmx.de>
* dwarf2dbg.c (dwarf2_emit_insn): Fix calculation of line info offset.

36
gas/symbols.c
View File

@ -73,6 +73,10 @@ struct symbol_flags
before. It is cleared as soon as any direct reference to the
symbol is present. */
unsigned int sy_weakrefd : 1;
/* This if set if the unit of the symbol value is "octets" instead
of "bytes". */
unsigned int sy_octets : 1;
};
/* The information we keep for a symbol. Note that the symbol table
@ -843,6 +847,14 @@ symbol_temp_new_now (void)
return symbol_temp_new (now_seg, frag_now_fix (), frag_now);
}
symbolS *
symbol_temp_new_now_octets (void)
{
symbolS * symb = symbol_temp_new (now_seg, frag_now_fix_octets (), frag_now);
symb->sy_flags.sy_octets = 1;
return symb;
}
symbolS *
symbol_temp_make (void)
{
@ -1324,7 +1336,10 @@ resolve_symbol_value (symbolS *symp)
/* Fall through. */
case O_constant:
final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
if (symp->sy_flags.sy_octets)
final_val += symp->sy_frag->fr_address;
else
final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
if (final_seg == expr_section)
final_seg = absolute_section;
/* Fall through. */
@ -2650,6 +2665,18 @@ symbol_set_value_now (symbolS *sym)
symbol_set_frag (sym, frag_now);
}
/* Set the value of SYM to the current position in the current segment,
in octets. */
void
symbol_set_value_now_octets (symbolS *sym)
{
S_SET_SEGMENT (sym, now_seg);
S_SET_VALUE (sym, frag_now_fix_octets ());
symbol_set_frag (sym, frag_now);
sym->sy_flags.sy_octets = 1;
}
/* Set the frag of a symbol. */
void
@ -2921,6 +2948,13 @@ symbol_set_bfdsym (symbolS *s, asymbol *bsym)
/* else XXX - What do we do now ? */
}
/* Return whether symbol unit is "octets" (instead of "bytes"). */
int symbol_octets_p (symbolS *s)
{
return s->sy_flags.sy_octets;
}
#ifdef OBJ_SYMFIELD_TYPE
/* Get a pointer to the object format information for a symbol. */

3
gas/symbols.h
View File

@ -57,6 +57,7 @@ symbolS *symbol_clone_if_forward_ref (symbolS *, int);
#define symbol_clone_if_forward_ref(s) symbol_clone_if_forward_ref (s, 0)
symbolS *symbol_temp_new (segT, valueT, fragS *);
symbolS *symbol_temp_new_now (void);
symbolS *symbol_temp_new_now_octets (void);
symbolS *symbol_temp_make (void);
symbolS *colon (const char *sym_name);
@ -181,6 +182,7 @@ extern expressionS *symbol_get_value_expression (symbolS *);
extern void symbol_set_value_expression (symbolS *, const expressionS *);
extern offsetT *symbol_X_add_number (symbolS *);
extern void symbol_set_value_now (symbolS *);
extern void symbol_set_value_now_octets (symbolS *);
extern void symbol_set_frag (symbolS *, fragS *);
extern fragS *symbol_get_frag (symbolS *);
extern void symbol_mark_used (symbolS *);
@ -206,6 +208,7 @@ extern symbolS *symbol_symbolS (symbolS *);
extern asymbol *symbol_get_bfdsym (symbolS *);
extern void symbol_set_bfdsym (symbolS *, asymbol *);
extern int symbol_same_p (symbolS *, symbolS *);
extern int symbol_octets_p (symbolS *);
#ifdef OBJ_SYMFIELD_TYPE
OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *);