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view lwasm/pass6.c @ 473:8181ddd707f1
Add "nooutput" pragma
Add the "nooutput" pragma which causes assembly to proceed as normal for
code with the exception that no output is generated for any instructions
under this pragma. The current address is increased as usual and the symbol
table is still constructed. However, no actual output is generated for lines
operating under this pragma.
author | William Astle <lost@l-w.ca> |
---|---|
date | Thu, 01 Nov 2018 23:07:03 -0600 |
parents | 58cafa61ab40 |
children |
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/* pass6.c Copyright © 2010 William Astle This file is part of LWTOOLS. LWTOOLS 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 3 of the License, or (at your option) any later version. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <string.h> #include <lw_alloc.h> #include <lw_string.h> #include "lwasm.h" #include "instab.h" /* Finalize Pass Reduce all expressions in a final pass. Observation: Everything should reduce as far as it is going to in a single pass because all line addresses are now constant (or section-base offset) */ static int exprok_aux(lw_expr_t e, void *priv) { asmstate_t *as = priv; if (lw_expr_istype(e, lw_expr_type_int)) return 0; if (as -> output_format == OUTPUT_OBJ || as -> output_format == OUTPUT_LWMOD) { if (lw_expr_istype(e, lw_expr_type_oper)) return 0; if (lw_expr_istype(e, lw_expr_type_special) && (as -> output_format == OUTPUT_OBJ || as -> output_format == OUTPUT_LWMOD)) { int t; t = lw_expr_specint(e); if (t == lwasm_expr_secbase || t == lwasm_expr_syment || t == lwasm_expr_import) return 0; } } return 1; } static int exprok(asmstate_t *as, lw_expr_t e) { if (lw_expr_testterms(e, exprok_aux, as)) return 0; return 1; } void do_pass6(asmstate_t *as) { line_t *cl; struct line_expr_s *le; for (cl = as -> line_head; cl; cl = cl -> next) { as -> cl = cl; for (le = cl -> exprs; le; le = le -> next) { lwasm_reduce_expr(as, le -> expr); if (!exprok(as, le -> expr)) { lwasm_register_error2(as, cl, E_EXPRESSION_BAD, "%s", lw_expr_print(le -> expr)); } } } }