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view lwasm/pseudo.c @ 402:b20f14edda5a
Completed initial conversion to new parser allowing spaces in operands
Converted the remaining addressing modes. This required a complete rewrite
of a large portion of the indexed addressing parser. Now the entire indexed
parsing system is programmatic without cheating with a lookup table.
This update also fixes the "force 0,r" by writing a literal 0,r which is
*supposed* to work.
There will likely be some pseudo ops that need tweaking for space handling,
specially those that take multiple operands of some description which are
not expressions. (The expression parser call eats the spaces both before and
after the expression, if appropriate.)
author | William Astle <lost@l-w.ca> |
---|---|
date | Wed, 14 Oct 2015 20:49:41 -0600 |
parents | f2decd9b276d |
children | 4411a6123716 |
line wrap: on
line source
/* pseudo.c Copyright © 2010 William Astle This file is part of LWASM. LWASM 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 "lwasm.h" #include <stdio.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include <time.h> #include <lw_alloc.h> #include "instab.h" #include "input.h" #include "lw_string.h" void register_struct_entry(asmstate_t *as, line_t *l, int size, structtab_t *ss); // for "dts" PARSEFUNC(pseudo_parse_dts) { time_t tp; char *t; skip_operand(p); l -> len = 0; tp = time(NULL); t = l ->lstr = lw_strdup(ctime(&tp)); while (*t) { if (*t == '\n') break; t++; l -> len += 1; } } EMITFUNC(pseudo_emit_dts) { char *t; int i; for (t = l -> lstr, i = 0; i < l -> len; i++, t++) lwasm_emit(l, *t); } // for "dtb" PARSEFUNC(pseudo_parse_dtb) { skip_operand(p); l -> len = 6; } EMITFUNC(pseudo_emit_dtb) { time_t tp; struct tm *t; tp = time(NULL); t = localtime(&tp); lwasm_emit(l, t -> tm_year); lwasm_emit(l, t -> tm_mon + 1); lwasm_emit(l, t -> tm_mday); lwasm_emit(l, t -> tm_hour); lwasm_emit(l, t -> tm_min); lwasm_emit(l, t -> tm_sec); } // for "end" PARSEFUNC(pseudo_parse_end) { lw_expr_t addr; l -> len = 0; if (CURPRAGMA(l, PRAGMA_M80EXT) && input_isinclude(as)) return; /* ignore END inside includes */ as->endseen = 1; if (as -> output_format != OUTPUT_DECB) { skip_operand(p); return; } if (!**p) { addr = lw_expr_build(lw_expr_type_int, 0); } else { addr = lwasm_parse_expr(as, p); } if (!addr) { lwasm_register_error(as, as->cl, E_EXPRESSION_BAD); addr = lw_expr_build(lw_expr_type_int, 0); } lwasm_save_expr(l, 0, addr); } EMITFUNC(pseudo_emit_end) { lw_expr_t addr; if (CURPRAGMA(l, PRAGMA_M80EXT) && input_isinclude(as)) return; /* ignore END inside includes */ addr = lwasm_fetch_expr(l, 0); if (addr) { if (!lw_expr_istype(addr, lw_expr_type_int)) lwasm_register_error(as, l, E_EXEC_ADDRESS); else as -> execaddr = lw_expr_intval(addr); } as -> endseen = 1; } PARSEFUNC(pseudo_parse_fcb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error2(as, l, E_EXPRESSION_BAD, "(#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i; } EMITFUNC(pseudo_emit_fcb) { int i; lw_expr_t e; // int v; for (i = 0; i < l -> len; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 1); } } PARSEFUNC(pseudo_parse_fdb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error2(as, l, E_EXPRESSION_BAD, "(#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 2; } EMITFUNC(pseudo_emit_fdb) { int i; lw_expr_t e; // int v; for (i = 0; i < (l -> len)/2; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 2); } } PARSEFUNC(pseudo_parse_fdbs) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error2(as, l, E_EXPRESSION_BAD, "(#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 2; } EMITFUNC(pseudo_emit_fdbs) { int i; lw_expr_t e; lw_expr_t t; lw_expr_t t2; // int v; for (i = 0; i < (l -> len)/2; i++) { e = lwasm_fetch_expr(l, i); t = lw_expr_build(lw_expr_type_int, 256); t2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_divide, e, t); lwasm_reduce_expr(as, t2); lw_expr_destroy(t); lwasm_emitexpr(l, e, 1); lwasm_emitexpr(l, t2, 1); lw_expr_destroy(t2); } } PARSEFUNC(pseudo_parse_fqb) { int i = 0; lw_expr_t e; for (;;) { e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error2(as, l, E_EXPRESSION_BAD, "(#%d)", i); break; } lwasm_save_expr(l, i++, e); if (**p != ',') break; (*p)++; } l -> len = i * 4; } EMITFUNC(pseudo_emit_fqb) { int i; lw_expr_t e; // int v; for (i = 0; i < (l -> len)/4; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 4); } } static int cstringlen(asmstate_t *as, line_t *ln, char **p, char delim) { int l = 0; char *str = NULL; int blen = 0; int bsize = 0; if (!(as -> pragmas & PRAGMA_CESCAPES)) { for (; **p && **p != delim; (*p)++) { l++; if (blen >= bsize) { str = lw_realloc(str, bsize + 32); bsize += 32; } str[blen++] = **p; } } else { while (**p && **p != delim) { int wch = **p; if (**p == '\\') { /* escape sequence */ (*p)++; if (!**p) break; switch (**p) { /* octal sequence or NUL */ /* skip the "0", then skip up to two more digits */ case '0': case '1': case '2': case '3': wch = **p; wch -= 0x30; if ((*p)[1] >= '0' && (*p)[1] < '8') { (*p)++; wch *= 8; wch += **p - 0x30; } if ((*p)[1] >= '0' && (*p)[1] < '8') { (*p)++; wch *= 8; wch += **p -0x30; } break; /* hexadecimal value */ case 'x': (*p)++; // ignore "x" wch = 0; if (**p) // skip digit 1 { wch = **p - 0x30; if (wch > 9) wch -= 7; if (wch > 9) wch -= 32; (*p)++; } if (**p) { int i; i = **p - 0x30; if (i > 9) i -= 7; if (i > 9) i -= 32; wch = wch * 16 + i; } break; case 'a': wch = 7; break; case 'b': wch = 8; break; case 't': wch = 9; break; case 'n': wch = 10; break; case 'v': wch = 11; break; case 'f': wch = 12; break; case 'r': wch = 13; /* everything else represents itself */ default: break; } } /* now "wch" is the character to write out */ l++; (*p)++; if (blen >= bsize) { str = lw_realloc(str, bsize + 32); bsize += 32; } str[blen++] = wch; } } /* do something with the string here */ /* l is the string length, str is the string itself */ ln -> lstr = str; return l; } PARSEFUNC(pseudo_parse_fcc) { char delim; int i; if (!**p) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } (*p)++; l -> len = i; /* handle additional expressions, like FCC "Hello",13,0 */ if (CURPRAGMA(l, PRAGMA_M80EXT)) { if (**p == ',') { (*p)++; pseudo_parse_fcb(as, l, p); l -> fcc_extras = l -> len; l -> len = i + l -> fcc_extras; } } } EMITFUNC(pseudo_emit_fcc) { int i; lw_expr_t e; for (i = 0; i < l -> len - l -> fcc_extras; i++) lwasm_emit(l, l -> lstr[i]); /* PRAGMA_M80EXT */ for (i = 0; i < l -> fcc_extras; i++) { e = lwasm_fetch_expr(l, i); lwasm_emitexpr(l, e, 1); } } PARSEFUNC(pseudo_parse_fcs) { char delim; int i; if (!**p) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } (*p)++; l -> len = i; } EMITFUNC(pseudo_emit_fcs) { int i; for (i = 0; i < l -> len - 1; i++) lwasm_emit(l, l -> lstr[i]); lwasm_emit(l, l -> lstr[i] | 0x80); } PARSEFUNC(pseudo_parse_fcn) { char delim; int i; if (!**p) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } delim = **p; (*p)++; i = cstringlen(as, l, p, delim); if (**p != delim) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } (*p)++; l -> len = i + 1; } EMITFUNC(pseudo_emit_fcn) { int i; for (i = 0; i < (l -> len - 1); i++) lwasm_emit(l, l -> lstr[i]); lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_rmb) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } l -> lint = 0; if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); } else { int e; e = lw_expr_intval(expr); register_struct_entry(as, l, e, NULL); l -> len = 0; l -> lint = 1; l -> symset = 1; } } else { if (l -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmb) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_RESERVATION, "(%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr); else l -> len = lw_expr_intval(expr); } } EMITFUNC(pseudo_emit_rmb) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error2(as, l, E_EXPRESSION_NOT_CONST, "%d %d", l -> len, l -> dlen); } PARSEFUNC(pseudo_parse_rmd) { lw_expr_t expr; l -> lint = 0; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); } else { int e; e = lw_expr_intval(expr) * 2; register_struct_entry(as, l, e, NULL); l -> len = 0; l -> symset = 1; l -> lint = 1; } } else { if (l -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmd) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_RESERVATION, "(%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr) * 2; else l -> len = lw_expr_intval(expr) * 2; } } EMITFUNC(pseudo_emit_rmd) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); } PARSEFUNC(pseudo_parse_rmq) { lw_expr_t expr; l -> lint = 0; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } if (as -> instruct) { lwasm_reduce_expr(as, expr); if (!lw_expr_istype(expr, lw_expr_type_int)) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); } else { int e; e = lw_expr_intval(expr) * 4; register_struct_entry(as, l, e, NULL); l -> len = 0; l -> symset = 1; l -> lint = 1; } } else { if (as -> inmod) { l -> dlen = -1; l -> len = 0; } } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_rmq) { lw_expr_t expr; if (l -> lint) return; if (l -> inmod) { if (l -> dlen >= 0) return; } else { if (l -> len >= 0) return; } expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_RESERVATION, "(%d)", lw_expr_intval(expr)); l -> len = 0; l -> dlen = 0; return; } if (l -> inmod) l -> dlen = lw_expr_intval(expr) * 4; else l -> len = lw_expr_intval(expr) * 4; } } EMITFUNC(pseudo_emit_rmq) { if (l -> lint) return; if (l -> len < 0 || l -> dlen < 0) lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); } PARSEFUNC(pseudo_parse_zmq) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmq) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_BLOCKSIZE, "(%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr) * 4; } } EMITFUNC(pseudo_emit_zmq) { int i; if (l -> len < 0) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_zmd) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmd) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_BLOCKSIZE, "(%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr) * 2; } } EMITFUNC(pseudo_emit_zmd) { int i; if (l -> len < 0) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_zmb) { lw_expr_t expr; expr = lwasm_parse_expr(as, p); if (!expr) { lwasm_register_error(as, l, E_EXPRESSION_BAD); } lwasm_save_expr(l, 0, expr); } RESOLVEFUNC(pseudo_resolve_zmb) { lw_expr_t expr; if (l -> len >= 0) return; expr = lwasm_fetch_expr(l, 0); if (lw_expr_istype(expr, lw_expr_type_int)) { if (lw_expr_intval(expr) < 0) { lwasm_register_error2(as, l, E_NEGATIVE_BLOCKSIZE, "(%d)", lw_expr_intval(expr)); l -> len = 0; return; } l -> len = lw_expr_intval(expr); } } EMITFUNC(pseudo_emit_zmb) { int i; if (l -> len < 0) { lwasm_register_error(as, l, E_EXPRESSION_NOT_CONST); return; } for (i = 0; i < l -> len; i++) lwasm_emit(l, 0); } PARSEFUNC(pseudo_parse_org) { lw_expr_t e; l -> len = 0; e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } lw_expr_destroy(l -> daddr); l -> daddr = e; if (l -> inmod == 0) { lw_expr_destroy(l -> addr); l -> addr = e; } l -> len = 0; } PARSEFUNC(pseudo_parse_reorg) { lw_expr_t e = NULL; l -> len = 0; line_t *cl = l; for (cl = cl -> prev; cl; cl = cl -> prev) { if (cl -> insn == -1) continue; if (!strcmp("org", instab[cl -> insn].opcode)) { if (cl -> prev) { e = lw_expr_copy(cl -> prev -> daddr); break; } } } if (!e) { lwasm_register_error(as, l, E_ORG_NOT_FOUND); return; } lw_expr_destroy(l -> daddr); l -> daddr = e; if (l -> inmod == 0) { lw_expr_destroy(l -> addr); l -> addr = e; } l -> len = 0; } PARSEFUNC(pseudo_parse_equ) { lw_expr_t e; l -> len = 0; if (!(l -> sym)) { lwasm_register_error(as, l, E_SYMBOL_MISSING); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } register_symbol(as, l, l -> sym, e, symbol_flag_none); l -> symset = 1; l -> dptr = lookup_symbol(as, l, l -> sym); lw_expr_destroy(e); } PARSEFUNC(pseudo_parse_set) { lw_expr_t e; l -> len = 0; if (!(l -> sym)) { lwasm_register_error(as, l, E_SYMBOL_MISSING); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } register_symbol(as, l, l -> sym, e, symbol_flag_set); l -> symset = 1; l -> dptr = lookup_symbol(as, l, l -> sym); lw_expr_destroy(e); } PARSEFUNC(pseudo_parse_setdp) { lw_expr_t e; l -> len = 0; if (as -> output_format == OUTPUT_OBJ) { lwasm_register_error(as, l, E_SETDP_INVALID); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } // try simplifying the expression and see if it turns into an int lwasm_reduce_expr(as, e); if (!lw_expr_istype(e, lw_expr_type_int)) { lwasm_register_error(as, l, E_SETDP_NOT_CONST); lw_expr_destroy(e); return; } l -> dpval = lw_expr_intval(e) & 0xff; lw_expr_destroy(e); l -> dshow = l -> dpval; l -> dsize = 1; } PARSEFUNC(pseudo_parse_ifp1) { l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } lwasm_register_error2(as, l, W_NOT_SUPPORTED, "%s", "IFP1"); } PARSEFUNC(pseudo_parse_ifp2) { l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } lwasm_register_error2(as, l, W_NOT_SUPPORTED, "%s", "IFP2"); } PARSEFUNC(pseudo_parse_ifeq) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) != 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifne) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) == 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifgt) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) <= 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifge) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) < 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_iflt) { lw_expr_t e; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) >= 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_ifle) { lw_expr_t e; l -> hideline = 1; l -> len = 0; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } e = lwasm_parse_cond(as, p); if (e) lwasm_reduce_expr(as, e); if (e && lw_expr_intval(e) > 0) { as -> skipcond = 1; as -> skipcount = 1; } } PARSEFUNC(pseudo_parse_endc) { l -> hideline = 1; l -> len = 0; skip_operand(p); if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount--; if (as -> skipcount <= 0) as -> skipcond = 0; } } PARSEFUNC(pseudo_parse_else) { l -> len = 0; l -> hideline = 1; skip_operand(p); if (as -> skipmacro) return; if (as -> skipcond) { if (as -> skipcount == 1) { as -> skipcount = 0; as -> skipcond = 0; } return; } as -> skipcond = 1; as -> skipcount = 1; } PARSEFUNC(pseudo_parse_ifdef) { char *sym; int i; struct symtabe *s; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } again: for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '|' && (*p)[i] != '&'; i++) /* do nothing */ ; sym = lw_strndup(*p, i); (*p) += i; s = lookup_symbol(as, l, sym); lw_free(sym); if (!s) { if (**p == '|') { (*p)++; goto again; } as -> skipcond = 1; as -> skipcount = 1; } skip_operand(p); } PARSEFUNC(pseudo_parse_ifndef) { char *sym; int i; struct symtabe *s; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '&' && (*p)[i] != '|'; i++) /* do nothing */ ; sym = lw_strndup(*p, i); (*p) += i; s = lookup_symbol(as, l, sym); lw_free(sym); if (s) { as -> skipcond = 1; as -> skipcount = 1; return; } } PARSEFUNC(pseudo_parse_ifpragma) { char *pstr; int i; int pragma; int compare; l -> len = 0; l -> hideline = 1; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } again: for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '|' && (*p)[i] != '&'; i++) /* do nothing */; pstr = lw_strndup(*p, i); (*p) += i; pragma = parse_pragma_helper(pstr); if (!pragma) lwasm_register_error(as, l, E_PRAGMA_UNRECOGNIZED); lw_free(pstr); if (pragma & PRAGMA_CLEARBIT) { pragma &= ~PRAGMA_CLEARBIT; /* strip off flag bit */ compare = l -> pragmas & pragma ? 0 : 1; } else { compare = l -> pragmas & pragma; } if (!compare) { if (**p == '|') { (*p)++; goto again; } as -> skipcond = 1; as -> skipcount = 1; } skip_operand(p); } PARSEFUNC(pseudo_parse_error) { lwasm_register_error2(as, l, E_USER_SPECIFIED, "%s", *p); skip_operand(p); } PARSEFUNC(pseudo_parse_warning) { lwasm_register_error2(as, l, W_USER_SPECIFIED, "%s", *p); l -> len = 0; skip_operand(p); } PARSEFUNC(pseudo_parse_includebin) { char *fn, *p2; int delim = 0; FILE *fp; long flen; char *rfn; if (!**p) { lwasm_register_error(as, l, E_FILENAME_MISSING); return; } if (**p == '"' || **p == '\'') { delim = **p; (*p)++; for (p2 = *p; *p2 && (*p2 != delim); p2++) /* do nothing */ ; } else { for (p2 = *p; *p2 && !isspace(*p2); p2++) /* do nothing */ ; } fn = lw_strndup(*p, p2 - *p); *p = p2; if (delim && **p) (*p)++; fp = input_open_standalone(as, fn, &rfn); if (!fp) { lwasm_register_error(as, l, E_FILE_OPEN); lw_free(fn); return; } l -> lstr = rfn; fseek(fp, 0, SEEK_END); flen = ftell(fp); fclose(fp); l -> len = flen; } EMITFUNC(pseudo_emit_includebin) { FILE *fp; int c; fp = fopen(l -> lstr, "rb"); if (!fp) { lwasm_register_error2(as, l, E_FILE_OPEN, "%s", "(emit)!"); return; } for (;;) { c = fgetc(fp); if (c == EOF) { fclose(fp); return; } lwasm_emit(l, c); } } PARSEFUNC(pseudo_parse_include) { char *fn, *p2; char *p3; int delim = 0; int len; char buf[110]; if (!**p) { lwasm_register_error(as, l, E_FILENAME_MISSING); return; } if (**p == '"' || **p == '\'') { delim = **p; (*p)++; for (p2 = *p; *p2 && *p2 != delim; p2++) /* do nothing */ ; } else { for (p2 = *p; *p2 && !isspace(*p2); p2++) /* do nothing */ ; } fn = lw_strndup(*p, p2 - *p); (*p) = p2; if (delim && **p) (*p)++; /* add a book-keeping entry for line numbers */ snprintf(buf, 100, "\001\001SETLINENO %d\n", l -> lineno + 1); input_openstring(as, "INTERNAL", buf); len = strlen(fn) + 8; p3 = lw_alloc(len + 1); sprintf(p3, "include:%s", fn); as -> fileerr = 0; input_open(as, p3); lw_free(p3); if (as -> fileerr == 0) l -> hideline = 1; l -> len = 0; lw_free(fn); } PARSEFUNC(pseudo_parse_align) { lw_expr_t e; if (!**p) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } lwasm_save_expr(l, 0, e); if (**p == ',') { (*p)++; e = lwasm_parse_expr(as, p); } else { e = lw_expr_build(lw_expr_type_int, 0); } if (!e) { lwasm_register_error(as, l, E_PADDING_BAD); return; } lwasm_save_expr(l, 1, e); } RESOLVEFUNC(pseudo_resolve_align) { lw_expr_t e; int align = 1; lw_expr_t te; int a; e = lwasm_fetch_expr(l, 0); if (lw_expr_istype(e, lw_expr_type_int)) { align = lw_expr_intval(e); if (align < 1) { lwasm_register_error(as, l, E_ALIGNMENT_INVALID); return; } } else { return; } te = lw_expr_copy(l -> addr); as -> exportcheck = 1; lwasm_reduce_expr(as, te); as -> exportcheck = 0; if (lw_expr_istype(te, lw_expr_type_int)) { a = lw_expr_intval(te); } else { a = -1; } lw_expr_destroy(te); if (a >= 0) { if (a % align == 0) { l -> len = 0; return; } l -> len = align - (a % align); return; } } EMITFUNC(pseudo_emit_align) { lw_expr_t e; int i; if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant))) return; e = lwasm_fetch_expr(l, 1); for (i = 0; i < l -> len; i++) { lwasm_emitexpr(l, e, 1); } } PARSEFUNC(pseudo_parse_fill) { lw_expr_t e, e1; if (!**p) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } e1 = lwasm_parse_expr(as, p); if (**p != ',') { lwasm_register_error(as, l, E_OPERAND_BAD); return; } (*p)++; e = lwasm_parse_expr(as, p); if (!e) { lwasm_register_error(as, l, E_OPERAND_BAD); return; } lwasm_save_expr(l, 0, e); lwasm_save_expr(l, 1, e1); if (!e1) { lwasm_register_error(as, l, E_PADDING_BAD); return; } } RESOLVEFUNC(pseudo_resolve_fill) { lw_expr_t e, te; int align = 1; e = lwasm_fetch_expr(l, 0); te = lw_expr_copy(e); as -> exportcheck = 1; lwasm_reduce_expr(as, te); as -> exportcheck = 0; if (lw_expr_istype(te, lw_expr_type_int)) { align = lw_expr_intval(te); if (align < 0) { lw_expr_destroy(te); lwasm_register_error(as, l, E_FILL_INVALID); return; } } else { lw_expr_destroy(te); return; } lw_expr_destroy(te); l -> len = align; } EMITFUNC(pseudo_emit_fill) { lw_expr_t e; int i; /* don't emit anything in bss */ if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant))) return; e = lwasm_fetch_expr(l, 1); for (i = 0; i < l -> len; i++) { lwasm_emitexpr(l, e, 1); } } /* string conditional argument parser */ /* argument syntax: a bare word ended by whitespace, comma, or NUL a double quote delimited string containing arbitrary printable characters a single quote delimited string containing arbitrary printable characters In a double quoted string, a double quote cannot be represented. In a single quoted string, a single quote cannot be represented. */ char *strcond_parsearg(char **p) { char *arg; char *tstr; int i; tstr = *p; if (!**p || isspace(**p)) { return lw_strdup(""); } if (*tstr == '"') { // double quote delim tstr++; for (i = 0; tstr[i] && tstr[i] != '"'; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i]) i++; *p += i; return arg; } else if (*tstr == '\'') { // single quote delim tstr++; for (i = 0; tstr[i] && tstr[i] != '\''; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i]) i++; *p += i; return arg; } else { // bare word - whitespace or comma delim for (i = 0; tstr[i] && !isspace(tstr[i]) && tstr[i] != ','; i++) /* do nothing */ ; arg = lw_alloc(i + 1); strncpy(arg, tstr, i); arg[i] = 0; if (tstr[i] == ',') i++; *p += i; return arg; } } /* string conditional helpers */ /* return "1" for true, "0" for false */ int strcond_eq(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcmp(arg1, arg2) == 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ieq(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcasecmp(arg1, arg2) == 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ne(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcmp(arg1, arg2) != 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_ine(char **p) { char *arg1; char *arg2; int c = 0; arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); if (strcasecmp(arg1, arg2) != 0) c = 1; lw_free(arg1); lw_free(arg2); return c; } int strcond_peq(char **p) { char *arg0; char *arg1; char *arg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcmp(arg1, arg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_ipeq(char **p) { char *arg0; char *arg1; char *arg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcasecmp(arg1, arg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_pne(char **p) { char *arg0; char *arg1; char *arg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcmp(arg1, arg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_ipne(char **p) { char *arg0; char *arg1; char *arg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) arg1[plen] = 0; if (strlen(arg2) > plen) arg2[plen] = 0; if (strcasecmp(arg1, arg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_seq(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcmp(rarg1, rarg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_iseq(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcasecmp(rarg1, rarg2) == 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_sne(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcmp(rarg1, rarg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } int strcond_isne(char **p) { char *arg0; char *arg1; char *arg2; char *rarg1; char *rarg2; size_t plen; int c = 0; arg0 = strcond_parsearg(p); arg1 = strcond_parsearg(p); arg2 = strcond_parsearg(p); rarg1 = arg1; rarg2 = arg2; plen = strtol(arg0, NULL, 10); if (strlen(arg1) > plen) { rarg1 += strlen(arg1) - plen; } if (strlen(arg2) > plen) { rarg2 += strlen(arg2) - plen; } if (strcasecmp(rarg1, rarg2) != 0) c = 1; lw_free(arg0); lw_free(arg1); lw_free(arg2); return c; } /* string conditionals */ PARSEFUNC(pseudo_parse_ifstr) { static struct strconds { char *str; int (*fn)(char **ptr); } strops[] = { { "eq", strcond_eq }, { "ieq", strcond_ieq }, { "ne", strcond_ne }, { "ine", strcond_ine }, { "peq", strcond_peq }, { "ipeq", strcond_ipeq }, { "pne", strcond_pne }, { "ipne", strcond_ipne }, { "seq", strcond_seq }, { "iseq", strcond_iseq }, { "sne", strcond_sne }, { "isne", strcond_isne }, { NULL, 0 } }; int tv = 0; char *tstr; int strop; l -> len = 0; if (as -> skipcond && !(as -> skipmacro)) { as -> skipcount++; skip_operand(p); return; } tstr = strcond_parsearg(p); if (!**p || isspace(**p)) { lwasm_register_error(as, l, E_STRING_BAD); return; } for (strop = 0; strops[strop].str != NULL; strop++) if (strcasecmp(strops[strop].str, tstr) == 0) break; lw_free(tstr); if (strops[strop].str == NULL) { lwasm_register_error(as, l, E_STRING_BAD); } tv = (*(strops[strop].fn))(p); if (!tv) { as -> skipcond = 1; as -> skipcount = 1; } }