/* $VER: pasm main.c V0.7 (02.01.98) * * This file is part of pasm, a portable PowerPC assembler. * Copyright (c) 1997-98 Frank Wille * * pasm is freeware and part of the portable and retargetable ANSI C * compiler vbcc, copyright (c) 1995-98 by Volker Barthelmann. * pasm may be freely redistributed as long as no modifications are * made and nothing is charged for it. Non-commercial usage is allowed * without any restrictions. * EVERY PRODUCT OR PROGRAM DERIVED DIRECTLY FROM MY SOURCE MAY NOT BE * SOLD COMMERCIALLY WITHOUT PERMISSION FROM THE AUTHOR. * * * v0.7 (02.01.98) phx * Allow more than two assembler passes, as required for * optimizations. * Option -O (output format) was renamed to -F. New option -O for * enabling optimizations. * Output format 3 is ADOS (like EHF, but doesn't use HUNK_PPC_CODE). * v0.6 (30.10.97) phx * Options to disable warnings for optional, 64-bit and super- * visor instructions: -mo, -m64, -ms. * v0.5 (12.10.97) phx * Option -D defines symbols. If an '=' is missing, a default * value of '1' will be assigned. Assignment of symbols, which * are defined later in the source, is also allowed. * v0.4 (05.07.97) phx * Program returns EXIT_FAILURE if an error occurs. * -V prints only version and build string and no instructions. * Base address for absolute code may be set with -B option. * EHF support. * New option -I to specify some include paths. * Option -x automatically declares unknown symbols as * externally defined. * v0.2 (25.03.97) phx * Writes ELF object for 32-bit PowerPC big-endian. Either absolute * or ELF output format may be selected. ELF is default for all * currently supported platforms. PPCasm supports nine different * relocation types (there are much more...). * Compiles and works also under NetBSD/amiga (68k). * Changed function declaration to 'new style' in all sources * (to avoid problems with '...' for example). * Supports multiple output formats. Currently Absolute and ELF. * v0.1 (11.03.97) phx * First test version with all PowerPC instructions and most * important directives. Only raw, absolute output. * v0.0 (14.02.97) phx * File created. Project started. */ #define MAIN_C #include "ppcasm.h" struct GlobalVars gvars; void cleanup(struct GlobalVars *); static char *default_destname(struct GlobalVars *); static void reset_sections(struct GlobalVars *); static char *get_option_arg(int,char *[],int *); static void write_object(struct GlobalVars *); main(int argc,char *argv[]) { struct GlobalVars *gv = &gvars; int i,j; char *buf; char *stdassgn = "1"; /* default assignment for user definitions */ struct UserDefine *udn; /* initialize and set default values */ memset(gv,0,sizeof(struct GlobalVars)); gv->maxerrors = DEF_MAXERRORS; gv->output = OFMT_DEFAULT; /* default output format */ initlist(&gv->sourcelist); initlist(&gv->sectionlist); initlist(&gv->userdeflist); if (argc<2 || (argc==2 && *argv[1]=='?')) { show_usage(); exit(EXIT_SUCCESS); } for (i=1; idest_name = get_option_arg(argc,argv,&i))) error(3); /* missing output file name */ break; case 'w': /* suppress warnings */ gv->dontwarn = TRUE; break; case 'x': /* auto extern */ gv->autoextern = TRUE; break; case 'R': /* don't predefine register symbols, etc. */ gv->noregsymbols = TRUE; break; case 'X': /* no extended mnemonics */ gv->noextmnemo = TRUE; break; case 'F': /* set output format (0=abs, 1=elf, 2=ehf, ... ) */ if (buf = get_option_arg(argc,argv,&i)) { if ((j = atoi(buf)) > OFMT_LAST) error(49,j); /* unknown output format */ else gv->output = j; } else error(48,'F'); /* option -F: argument expected */ break; case 'O': /* set optimization level (0=none, ...) */ if (buf = get_option_arg(argc,argv,&i)) gv->opt = (uint32)atoi(buf); else error(48,'O'); /* option -O: argument expected */ break; case 'I': /* add include path */ for (j=0; jincpaths[j] == NULL) { if (!(gv->incpaths[j] = get_option_arg(argc,argv,&i))) error(48,'I'); /* option -I: argument expected */ break; } } if (j >= MAX_INCPATHS) /* path was ignored */ error(51,MAX_INCPATHS,get_option_arg(argc,argv,&i)); break; case 'B': /* base address for absolute code */ if (buf = get_option_arg(argc,argv,&i)) { if (!(sscanf(buf,"%li",(long *)&gv->absbase))) error(54,'B'); /* option -B: integer expected */ } else error(48,'B'); /* option -B: argument expected */ break; case 'D': /* define a symbol */ if (buf = get_option_arg(argc,argv,&i)) { buf = getsymbol(gv,buf); if (*gv->strbuf) { buf = skipspaces(buf); if (*buf == '=') buf = skipspaces(++buf); else buf = stdassgn; udn = alloc(sizeof(struct UserDefine)); udn->line = alloc(8 + strlen(gv->strbuf) + strlen(buf)); sprintf(udn->line,".set %s,%s\n",gv->strbuf,buf); addtail(&gv->userdeflist,&udn->n); } else error(56,'D'); /* option -D: symbol name expected */ } else error(48,'D'); /* option -D: argument expected */ break; case 'm': /* -m set assembler mode */ if (buf = get_option_arg(argc,argv,&i)) { if (!strcmp(buf,"64")) { gv->sixtyfourmode = TRUE; break; } else if (*buf == 'o') { gv->optinstrmode = TRUE; break; } else if (*buf == 's') { gv->supermode = TRUE; break; } } error(57,buf); /* Unknown assembler mode -mX */ break; default: printf("Unknown option -%c ignored.\n",argv[i][1]); break; } } else { /* source file name */ if (gv->source_name) error(4); /* multiple source file names detected */ gv->source_name = argv[i]; } } if (!gv->source_name) error(2); /* missing source file name */ if (!gv->dest_name) gv->dest_name = default_destname(gv); /* initialization */ init_hashtables(gv); /* assemble */ exec_pass1(gv); for (;;) { gv->anotherpass = FALSE; exec_pass2(gv); if (!gv->anotherpass) break; /* another pass is required! */ reset_sections(gv); } /* write output file */ write_object(gv); cleanup(gv); } static void reset_sections(struct GlobalVars *gv) /* free section contents, all xrefs and relocations */ { struct Section *nexts,*sec=(struct Section *)gv->sectionlist.first; struct node *n; while (nexts = (struct Section *)sec->n.next) { while (n = remhead(&sec->reloclist)) free(n); while (n = remhead(&sec->xreflist)) free(n); if (!(sec->flags & SF_UNINITIALIZED) && sec->contents) { free(sec->contents); sec->data = sec->contents = NULL; } sec = nexts; } } static char *default_destname(struct GlobalVars *gv) /* make default output file name from source file name */ { char dname[STRBUFSIZE]; int i; strncpy(dname,gv->source_name,STRBUFSIZE-1); i = strlen(dname); while (i--) { if (dname[i] == '.') { /* replace old extension by ".o" */ dname[i] = 0; break; } } strcat(dname,".o"); return (allocstring(dname)); } static char *get_option_arg(int argc,char *argv[],int *i) /* get pointer to the string, which either directly follows the option character or is stored in the next argument */ { if (!argv[*i][2]) if (++*ioutput) { case OFMT_ABSOLUTE: output_absolute(gv); break; case OFMT_ELF: output_elf32msb(gv); break; case OFMT_EHF: case OFMT_ADOS: output_ehf(gv); break; } } void cleanup(struct GlobalVars *gv) { exit(gv->returncode); }