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- /* as.c - GAS main program.
- Copyright (C) 1987 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS 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 1, or (at your option)
- any later version.
-
- GAS 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 GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /*
- * Main program for AS; a 32-bit assembler of GNU.
- * Understands command arguments.
- * Has a few routines that don't fit in other modules because they
- * are shared.
- *
- *
- * bugs
- *
- * : initialisers
- * Since no-one else says they will support them in future: I
- * don't support them now.
- *
- */
-
- #include <signal.h>
- #include <string.h>
-
- #include "as.h"
- #include "input-scrub.h"
- #include "symbols.h"
- #include "sections.h"
- #include "read.h"
- #include "md.h"
- #include "messages.h"
- #include "xmalloc.h"
- #include "layout.h"
- #include "write_object.h"
-
- /* ['x'] TRUE if "-x" seen. */
- char flagseen[128] = { 0 };
-
- /* TRUE if -force_cpusubtype_ALL is specified */
- int force_cpusubtype_ALL = 0;
-
- /* set to the corresponding cpusubtype if -arch flag is specified */
- cpu_subtype_t archflag_cpusubtype = -1;
-
- /*
- * .include "file" looks in source file dir, then stack.
- * -I directories are added to the end, then the defaults are added.
- */
- struct directory_stack include_defaults[] = {
- { 0, "/NextDeveloper/Headers/" },
- { 0, "/LocalDeveloper/Headers/" },
- { 0, NULL }
- };
- struct directory_stack *include = NULL; /* First dir to search */
- static struct directory_stack *include_tail = NULL; /* Last in chain */
-
- /* next_version is in next_version.c which is created by the Makefile */
- extern char next_version[];
- /* this is only used here, thus defined here (was in version.c in GAS) */
- static char version_string[] = "GNU assembler version 1.38\n";
-
- /*
- * The list of signals to catch if not ignored.
- */
- static int sig[] = { SIGHUP, SIGINT, SIGPIPE, SIGTERM, 0};
- static void got_sig(
- int sig);
-
- static void perform_an_assembly_pass(
- int argc,
- char **argv);
-
- void
- main(
- int argc,
- char **argv,
- char **envp)
- {
- char *progname; /* argv[0] */
- int work_argc; /* variable copy of argc */
- char **work_argv; /* variable copy of argv */
- char *arg; /* an arg to program */
- char a; /* an arg flag (after -) */
- char *out_file_name;/* name of object file, argument to -o if specified */
- int i;
- char *specific_archflag;
- struct directory_stack *dirtmp;
-
- progname = argv[0];
-
- /*
- * Set up to catch the signals listed in sig[] that are not ignored.
- */
- for(i = 0; sig[i] != 0; i++)
- if(signal(sig[i], SIG_IGN) != SIG_IGN)
- signal(sig[i], got_sig);
- /*
- * Set the default for the flags that will be parsed.
- */
- memset(flagseen, '\0', sizeof(flagseen)); /* aint seen nothing yet */
- specific_archflag = NULL;
- out_file_name = "a.out"; /* default .o file */
-
- /*
- * Call the initialization routines.
- */
- check_for_ProjectBuilder(); /* messages.c */
- symbol_begin(); /* symbols.c */
- sections_begin(); /* sections.c */
- read_begin(); /* read.c */
- md_begin(); /* MACHINE.c */
- input_scrub_begin(); /* input_scrub.c */
-
- /* This is the -dynamic flag, which is now the default */
- flagseen[(int)'k'] = TRUE;
-
- /*
- * Parse arguments, but we are only interested in flags.
- * When we find a flag, we process it then make it's argv[] NULL.
- * This helps any future argv[] scanners avoid what we processed.
- * Since it is easy to do here we interpret the special arg "-"
- * to mean "use stdin" and we set that argv[] pointing to "".
- * After we have munged argv[], the only things left are source file
- * name(s) and ""(s) denoting stdin. These file names are used
- * (perhaps more than once) later.
- */
- work_argc = argc - 1; /* don't count argv[0] */
- work_argv = argv + 1; /* skip argv[0] */
- for( ; work_argc-- ; work_argv++){
-
- /* work_argv points to this argument */
- arg = *work_argv;
-
- /* Filename. We need it later. */
- if(*arg != '-')
- continue;
-
- /* Keep scanning args looking for flags. */
- if (arg[1] == '-' && arg[2] == 0) {
- /* "--" as an argument means read STDIN */
- /* on this scan, we don't want to think about filenames */
- *work_argv = ""; /* Code that means 'use stdin'. */
- continue;
- }
-
- /* This better be a switch ( -l where l is a letter. */
- arg++; /* -> letter. */
-
- /* scan all the 1-char flags */
- while((a = *arg)){
- arg ++; /* arg -> after letter. */
- a &= 0x7F; /* ascii only please */
- if(flagseen[(int)a] && (a != 'I') && (a != 'a') && (a != 'f') &&
- (a != 'd') && (a != 's') && (a != 'k'))
- as_warn("%s: Flag option -%c has already been seen!",
- progname, a);
- if(a != 'f')
- flagseen[(int)a] = TRUE;
- switch(a){
- case 'f':
- if(strcmp(arg-1, "force_cpusubtype_ALL") == 0){
- force_cpusubtype_ALL = 1;
- arg = ""; /* Finished with this arg. */
- break;
- }
- /* -f means fast - no need for "app" preprocessor. */
- flagseen[(int)a] = TRUE;
- break;
-
- case 'L': /* -L means keep L* symbols */
- break;
-
- case 'o':
- if(*arg != '\0') /* Rest of argument is object file-name. */
- out_file_name = arg;
- else if(work_argc){ /* Want next arg for a file-name. */
- *work_argv = NULL; /* This is not a file-name. */
- work_argc--;
- out_file_name = *++work_argv;
- }
- else
- as_warn("%s: I expected a filename after -o. \"%s\" "
- "assumed.", progname, out_file_name);
- arg = ""; /* Finished with this arg. */
- break;
-
- case 'R':
- /* -R means put data into text segment */
- as_warn("%s: -R option not supported (use the "
- ".const directive)", progname);
- flagseen['R'] = FALSE;
- break;
-
- case 'v':
- fprintf(stderr,"NeXT Computer, Inc. version "
- "%s, ", next_version);
- fprintf(stderr, version_string);
- if(*arg && strcmp(arg,"ersion"))
- as_warn("Unknown -v option ignored");
- while(*arg)
- arg++; /* Skip the rest */
- break;
-
- case 'W':
- /* -W means don't warn about things */
- break;
-
- case 'I':
- /* Add directory to path for includes */
- dirtmp = (struct directory_stack *)
- xmalloc(sizeof(struct directory_stack));
- /* New one goes on the end */
- dirtmp->next = 0;
- if(include == 0)
- include = dirtmp;
- else
- include_tail->next = dirtmp;
- /* Tail follows the last one */
- include_tail = dirtmp;
- /* Rest of argument is include file-name. */
- if(*arg)
- dirtmp->fname = arg;
- else if (work_argc){
- /* Want next arg for a file-name. */
- /* This is not a file-name. */
- *work_argv = NULL;
- work_argc--;
- dirtmp->fname = *++work_argv;
- }
- else
- as_warn("I expected a filename after -I.");
- arg = ""; /* Finished with this arg. */
- break;
-
- case 'g':
- /* generate stabs for debugging assembly code */
- break;
-
- case 'n':
- /* no default .text section */
- break;
-
- case 'd':
- if(strcmp(arg-1, "dynamic") == 0){
- arg = ""; /* Finished with this arg. */
- flagseen[(int)'k'] = TRUE;
- break;
- }
- goto unknown_flag;
-
- case 's':
- if(strcmp(arg-1, "static") == 0){
- arg = ""; /* Finished with this arg. */
- flagseen[(int)'k'] = FALSE;
- break;
- }
- goto unknown_flag;
-
- case 'N':
- if(strcmp(arg-1, "NEXTSTEP-deployment-target") == 0){
- arg = ""; /* Finished with this arg. */
- /* Want next arg for a <release_tag> */
- if(work_argc){
- /* This, "-NEXTST..." is not a file-name. */
- *work_argv = NULL;
- work_argc--;
- work_argv++;
- if(strcmp(*work_argv, "3.3") == 0){
- flagseen[(int)'k'] = TRUE;
- }
- else if(strcmp(*work_argv, "3.2") == 0){
- flagseen[(int)'k'] = FALSE;
- }
- else{
- as_fatal("I expected '3.2' or '3.3' after "
- "-NEXTSTEP-deployment-target.");
- }
- }
- else
- as_fatal("I expected a <release_tag> "
- "after -NEXTSTEP-deployment-target.");
- break;
- }
- goto unknown_flag;
-
- case 'k':
- /* use new features incompatible with 3.2 */
- break;
-
- case 'V':
- /* as driver's -V, verbose, flag */
- break;
-
- case 'a':
- if(strcmp(arg-1, "arch_multiple") == 0){
- arch_multiple = 1;
- arg = ""; /* Finished with this arg. */
- break;
- }
- else if(strcmp(arg-1, "arch") == 0){
- arg = ""; /* Finished with this arg. */
- /* Want next arg for a <arch_type> */
- if(work_argc){
- /* This, "-arch" is not a file-name. */
- *work_argv = NULL;
- work_argc--;
- work_argv++;
- #ifdef M68K
- if(strcmp(*work_argv, "m68030") == 0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_MC68030_ONLY)
- as_fatal("can't specify both "
- "-arch m68030 and -arch "
- "m68040");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_MC68030_ONLY;
- }
- else if(strcmp(*work_argv,
- "m68040") == 0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_MC68040)
- as_fatal("can't specify both "
- "-arch m68030 and -arch "
- "m68040");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_MC68040;
- }
- else if(strcmp(*work_argv, "m68k") != 0)
- as_fatal("I expected 'm68k', "
- "'m68030' or 'm68040' after "
- "-arch for this assembler.");
- #endif
- #ifdef M88K
- if(strcmp(*work_argv, "m88k") != 0)
- as_fatal("I expected 'm88k' after "
- "-arch for this assembler.");
- #endif
- #ifdef I860
- if(strcmp(*work_argv, "i860") != 0)
- as_fatal("I expected 'i860' after "
- "-arch for this assembler.");
- #endif
- #ifdef I386
- if(strcmp(*work_argv, "i486") == 0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_486)
- as_fatal("can't specify more "
- "than one -arch flag ");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_486;
- }
- else if(strcmp(*work_argv,
- "i486SX") == 0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_486SX)
- as_fatal("can't specify more "
- "than one -arch flag ");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_486SX;
- }
- else if(strcmp(*work_argv, "i586") ==0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_586)
- as_fatal("can't specify more "
- "than one -arch flag ");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_586;
- }
- else if(strcmp(*work_argv,
- "i586SX") == 0){
- if(archflag_cpusubtype != -1 &&
- archflag_cpusubtype !=
- CPU_SUBTYPE_586SX)
- as_fatal("can't specify more "
- "than one -arch flag ");
- specific_archflag = *work_argv;
- archflag_cpusubtype =
- CPU_SUBTYPE_586SX;
- }
- else if(strcmp(*work_argv, "i386") != 0)
- as_fatal("I expected 'i386', 'i486'"
- " 'i486SX', 'i586' or 'i586SX' "
- "after -arch for this "
- "assembler.");
- #endif
- #ifdef HPPA
- if(strcmp(*work_argv, "hppa") != 0)
- as_fatal("I expected 'hppa' after "
- "-arch for this assembler.");
- #endif
- #ifdef SPARC
- if(strcmp(*work_argv, "sparc") != 0)
- as_fatal("I expected 'sparc' after "
- "-arch for this assembler.");
- #endif
- }
- else
- as_fatal("I expected an <arch_type> "
- "after -arch.");
- break;
- }
- /* fall through for non -arch flag */
- default:
- unknown_flag:
- --arg;
- if(md_parse_option(&arg, &work_argc, &work_argv) == 0)
- as_warn("%s: I don't understand '%c' flag!", progname,
- a);
- if(arg && *arg)
- arg++;
- break;
- }
- }
- /*
- * We have just processed a "-..." arg, which was not a
- * file-name. Smash it so the
- * things that look for filenames won't ever see it.
- *
- * Whatever work_argv points to, it has already been used
- * as part of a flag, so DON'T re-use it as a filename.
- */
- *work_argv = NULL; /* NULL means 'not a file-name' */
- }
- if(flagseen['g'] == TRUE && flagseen['n'] == TRUE)
- as_fatal("-g can't be specified if -n is specified");
- /*
- * If we haven't seen a -force_cpusubtype_ALL or an -arch flag for a
- * specific architecture then let the machine instructions in the
- * assembly determine the cpusubtype of the output file.
- */
- if(force_cpusubtype_ALL && specific_archflag)
- archflag_cpusubtype = -1;
-
- /* Here with flags set up in flagseen[]. */
- perform_an_assembly_pass(argc, argv); /* Assemble it. */
-
- if(seen_at_least_1_file() && bad_error != TRUE){
- layout_addresses();
- write_object(out_file_name);
- }
-
- input_scrub_end();
- md_end(); /* MACHINE.c */
-
- exit(bad_error); /* WIN */
- }
-
- /* perform_an_assembly_pass()
- *
- * Here to attempt 1 pass over each input file.
- * We scan argv[*] looking for filenames or exactly "" which is
- * shorthand for stdin. Any argv that is NULL is not a file-name.
- * We set need_pass_2 TRUE if, after this, we still have unresolved
- * expressions of the form (unknown value)+-(unknown value).
- *
- * Note the un*x semantics: there is only 1 logical input file, but it
- * may be a catenation of many 'physical' input files.
- */
- static
- void
- perform_an_assembly_pass(
- int argc,
- char **argv)
- {
- char *buffer; /* Where each bufferful of lines will start. */
- int saw_a_file;
-
- saw_a_file = 0;
-
- argv++; /* skip argv[0] */
- argc--; /* skip argv[0] */
- while(argc--){
- if(*argv){ /* Is it a file-name argument? */
- /* argv -> "" if stdin desired, else -> filename */
- if((buffer = input_scrub_new_file(*argv))){
- saw_a_file++;
- read_a_source_file(buffer);
- }
- }
- argv++; /* completed that argv */
- }
- if(!saw_a_file)
- if((buffer = input_scrub_new_file("")))
- read_a_source_file(buffer);
- }
-
- static
- void
- got_sig(
- int sig)
- {
- as_bad("Interrupted by signal %d",sig);
- exit(1);
- }
-