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view lwlink/map.c @ 408:0af33282b518
Fix cycle counting for relative branches.
The original creator of the cycle counting code appears to have mangled two
different approaches to counting the cycles for relative branches into the
final product which led to counting too many cycles for the branch
instructions. The comments in the cycle table were correct but the code was
doing some incorrect things.
Also add the missing LBRN entry to the cycle table. The one labelled LBRN
was not, in fact, LBRN, but one of the actual useful branch instructions.
author | William Astle <lost@l-w.ca> |
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date | Thu, 03 Mar 2016 21:38:21 -0700 |
parents | d389adbcc4ab |
children |
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/* map.c Copyright © 2009 William Astle This file is part of LWLINK. LWLINK 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/>. Output information about the linking process */ #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <lw_alloc.h> #include "lwlink.h" struct symliste { char *name; char *fn; int addr; int ext; struct symliste *next; }; void display_map(void) { FILE *of; int sn; int std = 0; struct symliste *slist = NULL; struct symliste *ce, *pe, *ne; symtab_t *sym; int i; symlist_t *se; if (!strcmp(map_file, "-")) { std = 1; of = stdout; } else { of = fopen(map_file, "w"); if (!of) { fprintf(stderr, "Cannot open map file - using stdout\n"); std = 1; of = stdout; } } // display section list for (sn = 0; sn < nsects; sn++) { fprintf(of, "Section: %s (%s) load at %04X, length %04X\n", sanitize_symbol((char*)(sectlist[sn].ptr -> name)), sectlist[sn].ptr -> file -> filename, sectlist[sn].ptr -> loadaddress, sectlist[sn].ptr -> codesize ); } // generate a sorted list of symbols and display it for (se = symlist; se; se = se -> next) { for (pe = NULL, ce = slist; ce; ce = ce -> next) { i = strcmp(ce -> name, se -> sym); if (i > 0) { break; } pe = ce; } ne = lw_alloc(sizeof(struct symliste)); ne -> ext = 1; ne -> addr = se -> val; ne -> next = ce; ne -> name = se -> sym; ne -> fn = "<synthetic>"; if (pe) pe -> next = ne; else slist = ne; } for (sn = 0; sn < nsects; sn++) { for (sym = sectlist[sn].ptr -> localsyms; sym; sym = sym -> next) { for (pe = NULL, ce = slist; ce; ce = ce -> next) { i = strcmp(ce -> name, (char *)(sym -> sym)); if (i == 0) { i = strcmp(ce -> fn, sectlist[sn].ptr -> file -> filename); } if (i > 0) break; pe = ce; } ne = lw_alloc(sizeof(struct symliste)); ne -> ext = 0; if (sectlist[sn].ptr -> flags & SECTION_CONST) ne -> addr = sym -> offset; else ne -> addr = sym -> offset + sectlist[sn].ptr -> loadaddress; ne -> next = ce; ne -> name = (char *)(sym -> sym); ne -> fn = sectlist[sn].ptr -> file -> filename; if (pe) pe -> next = ne; else slist = ne; } } for (ce = slist; ce; ce = ce -> next) { fprintf(of, "Symbol: %s (%s) = %04X\n", sanitize_symbol(ce -> name), ce -> fn, ce -> addr); } if (!std) fclose(of); }