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.rept asm directive

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and '.' alone is a token now in *.S (not an identifier)
    representing a current position in the code (PC).
This commit is contained in:
seyko 2016-04-22 18:29:56 +03:00
parent edcb15c31f
commit 1f49441a27
3 changed files with 41 additions and 1 deletions
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37
tccasm.c
View File

@ -32,6 +32,8 @@ ST_FUNC int asm_get_local_label_name(TCCState *s1, unsigned int n)
}
ST_FUNC void asm_expr(TCCState *s1, ExprValue *pe);
static int tcc_assemble_internal(TCCState *s1, int do_preprocess);
static Sym sym_dot;
/* We do not use the C expression parser to handle symbols. Maybe the
C expression parser could be tweaked to do so. */
@ -101,6 +103,14 @@ static void asm_expr_unary(TCCState *s1, ExprValue *pe)
asm_expr(s1, pe);
skip(')');
break;
case '.':
pe->v = 0;
pe->sym = &sym_dot;
sym_dot.type.t = VT_VOID | VT_STATIC;
sym_dot.r = cur_text_section->sh_num;
sym_dot.jnext = ind;
next();
break;
default:
if (tok >= TOK_IDENT) {
/* label case : if the label was not found, add one */
@ -474,6 +484,33 @@ static void asm_parse_directive(TCCState *s1)
}
}
break;
case TOK_ASMDIR_rept:
{
int repeat;
TokenString init_str;
ParseState saved_parse_state = {0};
next();
repeat = asm_int_expr(s1);
tok_str_new(&init_str);
next();
while ((tok != TOK_ASMDIR_endr) && (tok != CH_EOF)) {
tok_str_add_tok(&init_str);
next();
}
if (tok == CH_EOF) tcc_error("we at end of file, .endr not found");
next();
tok_str_add(&init_str, -1);
tok_str_add(&init_str, 0);
save_parse_state(&saved_parse_state);
begin_macro(&init_str, 0);
while (repeat-- > 0) {
tcc_assemble_internal(s1, (parse_flags & PARSE_FLAG_PREPROCESS));
macro_ptr = init_str.str;
}
end_macro();
restore_parse_state(&saved_parse_state);
break;
}
case TOK_ASMDIR_org:
{
unsigned long n;

3
tccpp.c
View File

@ -2784,7 +2784,8 @@ maybe_newline:
cstr_reset(&tokcstr);
cstr_ccat(&tokcstr, '.');
goto parse_num;
} else if (parse_flags & PARSE_FLAG_ASM_FILE) {
} else if ((parse_flags & PARSE_FLAG_ASM_FILE)
&& (isidnum_table[c - CH_EOF] & (IS_ID|IS_NUM))) {
*--p = c = '.';
goto parse_ident_fast;
} else if (c == '.') {

2
tcctok.h
View File

@ -324,6 +324,8 @@
DEF_ASMDIR(bss)
DEF_ASMDIR(previous)
DEF_ASMDIR(fill)
DEF_ASMDIR(rept)
DEF_ASMDIR(endr)
DEF_ASMDIR(org)
DEF_ASMDIR(quad)
#if defined(TCC_TARGET_I386)