darlinghq/darling-gdb
1
0
Fork 0
mirror of https://github.com/darlinghq/darling-gdb.git synced 2024-11-30 07:20:41 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
7012071819
darling-gdb/gas/as.c

1001 lines
25 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* as.c - GAS main program.
Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 1997
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 2, 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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, 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 "ansidecl.h"
#define COMMON
#include "as.h"
#include "subsegs.h"
#include "output-file.h"
#include "sb.h"
#include "macro.h"
#ifndef HAVE_ITBL_CPU
#define itbl_parse(itbl_file) 1
#define itbl_init()
#endif
#ifdef HAVE_SBRK
#ifdef NEED_DECLARATION_SBRK
extern PTR sbrk ();
#endif
#endif
static void show_usage PARAMS ((FILE *));
static void parse_args PARAMS ((int *, char ***));
static void dump_statistics PARAMS ((void));
static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
static int macro_expr PARAMS ((const char *, int, sb *, int *));
int listing; /* true if a listing is wanted */
static char *listing_filename = NULL; /* Name of listing file. */
/* Type of debugging to generate. */
enum debug_info_type debug_type = DEBUG_NONE;
/* Maximum level of macro nesting. */
int max_macro_nest = 100;
char *myname; /* argv[0] */
#ifdef BFD_ASSEMBLER
segT reg_section, expr_section;
segT text_section, data_section, bss_section;
#endif
/* The default obstack chunk size. If we set this to zero, the
obstack code will use whatever will fit in a 4096 byte block. */
int chunksize = 0;
/* To monitor memory allocation more effectively, make this non-zero.
Then the chunk sizes for gas and bfd will be reduced. */
int debug_memory = 0;
/* We build a list of defsyms as we read the options, and then define
them after we have initialized everything. */
struct defsym_list
{
struct defsym_list *next;
char *name;
valueT value;
};
static struct defsym_list *defsyms;
/* Keep a record of the itbl files we read in. */
struct itbl_file_list
{
struct itbl_file_list *next;
char *name;
};
static struct itbl_file_list *itbl_files;
void
print_version_id ()
{
static int printed;
if (printed)
return;
printed = 1;
fprintf (stderr, "GNU assembler version %s (%s)", VERSION, TARGET_ALIAS);
#ifdef BFD_ASSEMBLER
fprintf (stderr, ", using BFD version %s", BFD_VERSION);
#endif
fprintf (stderr, "\n");
}
static void
show_usage (stream)
FILE *stream;
{
fprintf (stream, "Usage: %s [option...] [asmfile...]\n", myname);
fprintf (stream, "\
Options:\n\
-a[sub-option...] turn on listings\n\
Sub-options [default hls]:\n\
c omit false conditionals\n\
d omit debugging directives\n\
h include high-level source\n\
l include assembly\n\
m include macro expansions\n\
n omit forms processing\n\
s include symbols\n\
=file set listing file name (must be last sub-option)\n");
fprintf (stream, "\
-D produce assembler debugging messages\n\
--defsym SYM=VAL define symbol SYM to given value\n\
-f skip whitespace and comment preprocessing\n\
--gstabs generate stabs debugging information\n\
--help show this message and exit\n\
-I DIR add DIR to search list for .include directives\n\
-J don't warn about signed overflow\n\
-K warn when differences altered for long displacements\n\
-L,--keep-locals keep local symbols (e.g. starting with `L')\n");
fprintf (stream, "\
-M,--mri assemble in MRI compatibility mode\n\
--MD FILE write dependency information in FILE (default none)\n\
-nocpp ignored\n\
-o OBJFILE name the object-file output OBJFILE (default a.out)\n\
-R fold data section into text section\n\
--statistics print various measured statistics from execution\n\
--strip-local-absolute strip local absolute symbols\n\
--version print assembler version number and exit\n\
-W suppress warnings\n\
--itbl INSTTBL extend instruction set to include instructions\n\
matching the specifications defined in file INSTTBL\n\
-w ignored\n\
-X ignored\n\
-Z generate object file even after errors\n");
fprintf (stream, "\
--listing-lhs-width set the width in words of the output data column of\n\
the listing\n\
--listing-lhs-width2 set the width in words of the continuation lines\n\
of the output data column; ignored if smaller than\n\
the width of the first line\n\
--listing-rhs-width set the max width in characters of the lines from\n\
the source file\n\
--listing-cont-lines set the maximum number of continuation lines used\n\
for the output data column of the listing\n");
md_show_usage (stream);
fprintf (stream, "\nReport bugs to bug-gnu-utils@prep.ai.mit.edu\n");
}
#ifdef USE_EMULATIONS
#define EMULATION_ENVIRON "AS_EMULATION"
extern struct emulation mipsbelf, mipslelf, mipself;
extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
extern struct emulation i386coff, i386elf;
static struct emulation *const emulations[] = { EMULATIONS };
static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
static void select_emulation_mode PARAMS ((int, char **));
static void
select_emulation_mode (argc, argv)
int argc;
char **argv;
{
int i;
char *p, *em = 0;
for (i = 1; i < argc; i++)
if (!strncmp ("--em", argv[i], 4))
break;
if (i == argc)
goto do_default;
p = strchr (argv[i], '=');
if (p)
p++;
else
p = argv[i+1];
if (!p || !*p)
as_fatal ("missing emulation mode name");
em = p;
do_default:
if (em == 0)
em = getenv (EMULATION_ENVIRON);
if (em == 0)
em = DEFAULT_EMULATION;
if (em)
{
for (i = 0; i < n_emulations; i++)
if (!strcmp (emulations[i]->name, em))
break;
if (i == n_emulations)
as_fatal ("unrecognized emulation name `%s'", em);
this_emulation = emulations[i];
}
else
this_emulation = emulations[0];
this_emulation->init ();
}
const char *
default_emul_bfd_name ()
{
abort ();
return NULL;
}
void
common_emul_init ()
{
this_format = this_emulation->format;
if (this_emulation->leading_underscore == 2)
this_emulation->leading_underscore = this_format->dfl_leading_underscore;
if (this_emulation->default_endian != 2)
target_big_endian = this_emulation->default_endian;
if (this_emulation->fake_label_name == 0)
{
if (this_emulation->leading_underscore)
this_emulation->fake_label_name = "L0\001";
else
/* What other parameters should we test? */
this_emulation->fake_label_name = ".L0\001";
}
}
#endif
/*
* 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.
*
* check for new machine-dep cmdline options in
* md_parse_option definitions in config/tc-*.c
*/
static void
parse_args (pargc, pargv)
int *pargc;
char ***pargv;
{
int old_argc, new_argc;
char **old_argv, **new_argv;
/* Starting the short option string with '-' is for programs that
expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-option ARGV-element
as if it were the argument of an option with character code 1. */
char *shortopts;
extern CONST char *md_shortopts;
static const char std_shortopts[] =
{
'-', 'J',
#ifndef WORKING_DOT_WORD
/* -K is not meaningful if .word is not being hacked. */
'K',
#endif
'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
#ifndef VMS
/* -v takes an argument on VMS, so we don't make it a generic
option. */
'v',
#endif
'w', 'X',
/* New option for extending instruction set (see also --itbl below) */
't', ':',
'\0'
};
struct option *longopts;
extern struct option md_longopts[];
extern size_t md_longopts_size;
static const struct option std_longopts[] = {
#define OPTION_HELP (OPTION_STD_BASE)
{"help", no_argument, NULL, OPTION_HELP},
{"keep-locals", no_argument, NULL, 'L'},
{"mri", no_argument, NULL, 'M'},
#define OPTION_NOCPP (OPTION_STD_BASE + 1)
{"nocpp", no_argument, NULL, OPTION_NOCPP},
#define OPTION_STATISTICS (OPTION_STD_BASE + 2)
{"statistics", no_argument, NULL, OPTION_STATISTICS},
#define OPTION_VERSION (OPTION_STD_BASE + 3)
{"version", no_argument, NULL, OPTION_VERSION},
#define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG},
#define OPTION_VERBOSE (OPTION_STD_BASE + 5)
{"verbose", no_argument, NULL, OPTION_VERBOSE},
#define OPTION_EMULATION (OPTION_STD_BASE + 6)
{"emulation", required_argument, NULL, OPTION_EMULATION},
#define OPTION_DEFSYM (OPTION_STD_BASE + 7)
{"defsym", required_argument, NULL, OPTION_DEFSYM},
#define OPTION_INSTTBL (OPTION_STD_BASE + 8)
/* New option for extending instruction set (see also -t above).
The "-t file" or "--itbl file" option extends the basic set of
valid instructions by reading "file", a text file containing a
list of instruction formats. The additional opcodes and their
formats are added to the built-in set of instructions, and
mnemonics for new registers may also be defined. */
{"itbl", required_argument, NULL, OPTION_INSTTBL},
#define OPTION_LISTING_LHS_WIDTH (OPTION_STD_BASE + 9)
{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH},
#define OPTION_LISTING_LHS_WIDTH2 (OPTION_STD_BASE + 10)
{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2},
#define OPTION_LISTING_RHS_WIDTH (OPTION_STD_BASE + 11)
{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH},
#define OPTION_LISTING_CONT_LINES (OPTION_STD_BASE + 12)
{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES},
#define OPTION_DEPFILE (OPTION_STD_BASE + 13)
{"MD", required_argument, NULL, OPTION_DEPFILE},
#define OPTION_GSTABS (OPTION_STD_BASE + 14)
{"gstabs", no_argument, NULL, OPTION_GSTABS},
#define OPTION_STRIP_LOCAL_ABSOLUTE (OPTION_STD_BASE + 15)
{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE},
#define OPTION_NOWARNSWAP (OPTION_STD_BASE + 16)
{"nowarnswap", no_argument, NULL, OPTION_NOWARNSWAP}
};
/* Construct the option lists from the standard list and the
target dependent list. */
shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size);
memcpy (longopts, std_longopts, sizeof (std_longopts));
memcpy ((char *) longopts + sizeof (std_longopts),
md_longopts, md_longopts_size);
/* Make a local copy of the old argv. */
old_argc = *pargc;
old_argv = *pargv;
/* Initialize a new argv that contains no options. */
new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
new_argv[0] = old_argv[0];
new_argc = 1;
new_argv[new_argc] = NULL;
while (1)
{
/* getopt_long_only is like getopt_long, but '-' as well as '--' can
indicate a long option. */
int longind;
int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
&longind);
if (optc == -1)
break;
switch (optc)
{
default:
/* md_parse_option should return 1 if it recognizes optc,
0 if not. */
if (md_parse_option (optc, optarg) != 0)
break;
/* `-v' isn't included in the general short_opts list, so check for
it explicity here before deciding we've gotten a bad argument. */
if (optc == 'v')
{
#ifdef VMS
/* Telling getopt to treat -v's value as optional can result
in it picking up a following filename argument here. The
VMS code in md_parse_option can return 0 in that case,
but it has no way of pushing the filename argument back. */
if (optarg && *optarg)
new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
else
#else
case 'v':
#endif
case OPTION_VERBOSE:
print_version_id ();
break;
}
/*FALLTHRU*/
case '?':
exit (EXIT_FAILURE);
case 1: /* File name. */
if (!strcmp (optarg, "-"))
optarg = "";
new_argv[new_argc++] = optarg;
new_argv[new_argc] = NULL;
break;
case OPTION_HELP:
show_usage (stdout);
exit (EXIT_SUCCESS);
case OPTION_NOCPP:
break;
case OPTION_STATISTICS:
flag_print_statistics = 1;
break;
case OPTION_STRIP_LOCAL_ABSOLUTE:
flag_strip_local_absolute = 1;
break;
case OPTION_VERSION:
/* This output is intended to follow the GNU standards document. */
printf ("GNU assembler %s\n", VERSION);
printf ("Copyright 1997 Free Software Foundation, Inc.\n");
printf ("\
This program is free software; you may redistribute it under the terms of\n\
the GNU General Public License. This program has absolutely no warranty.\n");
printf ("This assembler was configured for a target of `%s'.\n",
TARGET_ALIAS);
exit (EXIT_SUCCESS);
case OPTION_EMULATION:
#ifdef USE_EMULATIONS
if (strcmp (optarg, this_emulation->name))
as_fatal ("multiple emulation names specified");
#else
as_fatal ("emulations not handled in this configuration");
#endif
break;
case OPTION_DUMPCONFIG:
fprintf (stderr, "alias = %s\n", TARGET_ALIAS);
fprintf (stderr, "canonical = %s\n", TARGET_CANONICAL);
fprintf (stderr, "cpu-type = %s\n", TARGET_CPU);
#ifdef TARGET_OBJ_FORMAT
fprintf (stderr, "format = %s\n", TARGET_OBJ_FORMAT);
#endif
#ifdef TARGET_FORMAT
fprintf (stderr, "bfd-target = %s\n", TARGET_FORMAT);
#endif
exit (EXIT_SUCCESS);
case OPTION_DEFSYM:
{
char *s;
long i;
struct defsym_list *n;
for (s = optarg; *s != '\0' && *s != '='; s++)
;
if (*s == '\0')
as_fatal ("bad defsym; format is --defsym name=value");
*s++ = '\0';
i = strtol (s, (char **) NULL, 0);
n = (struct defsym_list *) xmalloc (sizeof *n);
n->next = defsyms;
n->name = optarg;
n->value = i;
defsyms = n;
}
break;
case OPTION_INSTTBL:
case 't':
{
/* optarg is the name of the file containing the instruction
formats, opcodes, register names, etc. */
struct itbl_file_list *n;
if (optarg == NULL)
{
as_warn ( "No file name following -t option\n" );
break;
}
n = (struct itbl_file_list *) xmalloc (sizeof *n);
n->next = itbl_files;
n->name = optarg;
itbl_files = n;
/* Parse the file and add the new instructions to our internal
table. If multiple instruction tables are specified, the
information from this table gets appended onto the existing
internal table. */
itbl_files->name = xstrdup (optarg);
if (itbl_parse (itbl_files->name) != 0)
{
fprintf (stderr, "Failed to read instruction table %s\n",
itbl_files->name);
exit (EXIT_SUCCESS);
}
}
break;
case OPTION_DEPFILE:
start_dependencies (optarg);
break;
case OPTION_GSTABS:
debug_type = DEBUG_STABS;
break;
case OPTION_NOWARNSWAP:
flag_warn_instructionswap = 0;
break;
case 'J':
flag_signed_overflow_ok = 1;
break;
#ifndef WORKING_DOT_WORD
case 'K':
flag_warn_displacement = 1;
break;
#endif
case 'L':
flag_keep_locals = 1;
break;
case OPTION_LISTING_LHS_WIDTH:
listing_lhs_width = atoi(optarg);
if (listing_lhs_width_second < listing_lhs_width)
listing_lhs_width_second = listing_lhs_width;
break;
case OPTION_LISTING_LHS_WIDTH2:
{
int tmp = atoi(optarg);
if (tmp > listing_lhs_width)
listing_lhs_width_second = tmp;
}
break;
case OPTION_LISTING_RHS_WIDTH:
listing_rhs_width = atoi(optarg);
break;
case OPTION_LISTING_CONT_LINES:
listing_lhs_cont_lines = atoi(optarg);
break;
case 'M':
flag_mri = 1;
#ifdef TC_M68K
flag_m68k_mri = 1;
#endif
break;
case 'R':
flag_readonly_data_in_text = 1;
break;
case 'W':
flag_no_warnings = 1;
break;
case 'Z':
flag_always_generate_output = 1;
break;
case 'a':
if (optarg)
{
while (*optarg)
{
switch (*optarg)
{
case 'c':
listing |= LISTING_NOCOND;
break;
case 'd':
listing |= LISTING_NODEBUG;
break;
case 'h':
listing |= LISTING_HLL;
break;
case 'l':
listing |= LISTING_LISTING;
break;
case 'm':
listing |= LISTING_MACEXP;
break;
case 'n':
listing |= LISTING_NOFORM;
break;
case 's':
listing |= LISTING_SYMBOLS;
break;
case '=':
listing_filename = xstrdup (optarg + 1);
optarg += strlen (listing_filename);
break;
default:
as_fatal ("invalid listing option `%c'", *optarg);
break;
}
optarg++;
}
}
if (!listing)
listing = LISTING_DEFAULT;
break;
case 'D':
/* DEBUG is implemented: it debugs different */
/* things from other people's assemblers. */
flag_debug = 1;
break;
case 'f':
flag_no_comments = 1;
break;
case 'I':
{ /* Include file directory */
char *temp = xstrdup (optarg);
add_include_dir (temp);
break;
}
case 'o':
out_file_name = xstrdup (optarg);
break;
case 'w':
break;
case 'X':
/* -X means treat warnings as errors */
break;
}
}
free (shortopts);
free (longopts);
*pargc = new_argc;
*pargv = new_argv;
}
static long start_time;
int
main (argc, argv)
int argc;
char **argv;
{
int macro_alternate;
int macro_strip_at;
int keep_it;
start_time = get_run_time ();
if (debug_memory)
{
#ifdef BFD_ASSEMBLER
extern long _bfd_chunksize;
_bfd_chunksize = 64;
#endif
chunksize = 64;
}
#ifdef HOST_SPECIAL_INIT
HOST_SPECIAL_INIT (argc, argv);
#endif
myname = argv[0];
xmalloc_set_program_name (myname);
START_PROGRESS (myname, 0);
#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
#endif
out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
flag_warn_instructionswap = 1;
hex_init ();
#ifdef BFD_ASSEMBLER
bfd_init ();
bfd_set_error_program_name (myname);
#endif
#ifdef USE_EMULATIONS
select_emulation_mode (argc, argv);
#endif
PROGRESS (1);
symbol_begin ();
frag_init ();
subsegs_begin ();
parse_args (&argc, &argv);
read_begin ();
input_scrub_begin ();
expr_begin ();
if (flag_print_statistics)
xatexit (dump_statistics);
macro_alternate = 0;
macro_strip_at = 0;
#ifdef TC_I960
macro_strip_at = flag_mri;
#endif
#ifdef TC_A29K
/* For compatibility with the AMD 29K family macro assembler
specification. */
macro_alternate = 1;
macro_strip_at = 1;
#endif
macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
PROGRESS (1);
#ifdef BFD_ASSEMBLER
output_file_create (out_file_name);
assert (stdoutput != 0);
#endif
#ifdef tc_init_after_args
tc_init_after_args ();
#endif
itbl_init ();
/* Now that we have fully initialized, and have created the output
file, define any symbols requested by --defsym command line
arguments. */
while (defsyms != NULL)
{
symbolS *sym;
struct defsym_list *next;
sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
&zero_address_frag);
symbol_table_insert (sym);
next = defsyms->next;
free (defsyms);
defsyms = next;
}
PROGRESS (1);
perform_an_assembly_pass (argc, argv); /* Assemble it. */
cond_finish_check (-1);
#ifdef md_end
md_end ();
#endif
if (seen_at_least_1_file ()
&& (flag_always_generate_output || had_errors () == 0))
keep_it = 1;
else
keep_it = 0;
#if defined (BFD_ASSEMBLER) || !defined (BFD)
/* This used to be done at the start of write_object_file in
write.c, but that caused problems when doing listings when
keep_it was zero. This could probably be moved above md_end, but
I didn't want to risk the change. */
subsegs_finish ();
#endif
if (keep_it)
write_object_file ();
#ifndef NO_LISTING
listing_print (listing_filename);
#endif
#ifndef OBJ_VMS /* does its own file handling */
#ifndef BFD_ASSEMBLER
if (keep_it)
#endif
output_file_close (out_file_name);
#endif
if (had_errors () > 0 && ! flag_always_generate_output)
keep_it = 0;
if (!keep_it)
unlink (out_file_name);
input_scrub_end ();
END_PROGRESS (myname);
/* Use xexit instead of return, because under VMS environments they
may not place the same interpretation on the value given. */
if (had_errors () > 0)
xexit (EXIT_FAILURE);
/* Only generate dependency file if assembler was successful. */
print_dependencies ();
xexit (EXIT_SUCCESS);
}
static void
dump_statistics ()
{
extern char **environ;
#ifdef HAVE_SBRK
char *lim = (char *) sbrk (0);
#endif
long run_time = get_run_time () - start_time;
fprintf (stderr, "%s: total time in assembly: %ld.%06ld\n",
myname, run_time / 1000000, run_time % 1000000);
#ifdef HAVE_SBRK
fprintf (stderr, "%s: data size %ld\n",
myname, (long) (lim - (char *) &environ));
#endif
subsegs_print_statistics (stderr);
write_print_statistics (stderr);
symbol_print_statistics (stderr);
read_print_statistics (stderr);
#ifdef tc_print_statistics
tc_print_statistics (stderr);
#endif
#ifdef obj_print_statistics
obj_print_statistics (stderr);
#endif
}
/* 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 (argc, argv)
int argc;
char **argv;
{
int saw_a_file = 0;
#ifdef BFD_ASSEMBLER
flagword applicable;
#endif
need_pass_2 = 0;
#ifndef BFD_ASSEMBLER
#ifdef MANY_SEGMENTS
{
unsigned int i;
for (i = SEG_E0; i < SEG_UNKNOWN; i++)
segment_info[i].fix_root = 0;
}
/* Create the three fixed ones */
{
segT seg;
#ifdef TE_APOLLO
seg = subseg_new (".wtext", 0);
#else
seg = subseg_new (".text", 0);
#endif
assert (seg == SEG_E0);
seg = subseg_new (".data", 0);
assert (seg == SEG_E1);
seg = subseg_new (".bss", 0);
assert (seg == SEG_E2);
#ifdef TE_APOLLO
create_target_segments ();
#endif
}
#else /* not MANY_SEGMENTS */
text_fix_root = NULL;
data_fix_root = NULL;
bss_fix_root = NULL;
#endif /* not MANY_SEGMENTS */
#else /* BFD_ASSEMBLER */
/* Create the standard sections, and those the assembler uses
internally. */
text_section = subseg_new (".text", 0);
data_section = subseg_new (".data", 0);
bss_section = subseg_new (".bss", 0);
/* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
to have relocs, otherwise we don't find out in time. */
applicable = bfd_applicable_section_flags (stdoutput);
bfd_set_section_flags (stdoutput, text_section,
applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_CODE | SEC_READONLY));
/* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/
bfd_set_section_flags (stdoutput, data_section,
applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC));
bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
seg_info (bss_section)->bss = 1;
subseg_new (BFD_ABS_SECTION_NAME, 0);
subseg_new (BFD_UND_SECTION_NAME, 0);
reg_section = subseg_new ("*GAS `reg' section*", 0);
expr_section = subseg_new ("*GAS `expr' section*", 0);
#endif /* BFD_ASSEMBLER */
subseg_set (text_section, 0);
/* This may add symbol table entries, which requires having an open BFD,
and sections already created, in BFD_ASSEMBLER mode. */
md_begin ();
#ifdef obj_begin
obj_begin ();
#endif
argv++; /* skip argv[0] */
argc--; /* skip argv[0] */
while (argc--)
{
if (*argv)
{ /* Is it a file-name argument? */
PROGRESS (1);
saw_a_file++;
/* argv->"" if stdin desired, else->filename */
read_a_source_file (*argv);
}
argv++; /* completed that argv */
}
if (!saw_a_file)
read_a_source_file ("");
} /* perform_an_assembly_pass() */
/* The interface between the macro code and gas expression handling. */
static int
macro_expr (emsg, idx, in, val)
const char *emsg;
int idx;
sb *in;
int *val;
{
char *hold;
expressionS ex;
sb_terminate (in);
hold = input_line_pointer;
input_line_pointer = in->ptr + idx;
expression (&ex);
idx = input_line_pointer - in->ptr;
input_line_pointer = hold;
if (ex.X_op != O_constant)
as_bad ("%s", emsg);
*val = (int) ex.X_add_number;
return idx;
}
/* end of as.c */
Reference in New Issue View Git Blame Copy Permalink