/* cond.c - conditional assembly pseudo-ops, and .include
- Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 2000, 2001
- Free Software Foundation, Inc.
+ Copyright (C) 1990-2020 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)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
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. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#include "as.h"
+#include "sb.h"
#include "macro.h"
#include "obstack.h"
scanned. */
struct obstack cond_obstack;
-struct file_line {
- char *file;
+struct file_line
+{
+ const char *file;
unsigned int line;
};
/* We push one of these structures for each .if, and pop it at the
.endif. */
-struct conditional_frame {
+struct conditional_frame
+{
/* The source file & line number of the "if". */
struct file_line if_file_line;
/* The source file & line of the "else". */
int macro_nest;
};
-static void initialize_cframe PARAMS ((struct conditional_frame *cframe));
-static char *get_mri_string PARAMS ((int, int *));
+static void initialize_cframe (struct conditional_frame *cframe);
+static char *get_mri_string (int, int *);
static struct conditional_frame *current_cframe = NULL;
+/* Performs the .ifdef (test_defined == 1) and
+ the .ifndef (test_defined == 0) pseudo op. */
+
void
-s_ifdef (arg)
- int arg;
+s_ifdef (int test_defined)
{
/* Points to name of symbol. */
- register char *name;
+ char *name;
/* Points to symbol. */
- register symbolS *symbolP;
+ symbolS *symbolP;
struct conditional_frame cframe;
+ char c;
/* Leading whitespace is part of operand. */
SKIP_WHITESPACE ();
name = input_line_pointer;
- if (!is_name_beginner (*name))
+ if (!is_name_beginner (*name) && *name != '"')
{
as_bad (_("invalid identifier for \".ifdef\""));
obstack_1grow (&cond_obstack, 0);
ignore_rest_of_line ();
+ return;
}
+
+ c = get_symbol_name (& name);
+ symbolP = symbol_find (name);
+ (void) restore_line_pointer (c);
+
+ initialize_cframe (&cframe);
+
+ if (cframe.dead_tree)
+ cframe.ignoring = 1;
else
{
- char c;
+ int is_defined;
- c = get_symbol_end ();
- symbolP = symbol_find (name);
- *input_line_pointer = c;
+ /* Use the same definition of 'defined' as .equiv so that a symbol
+ which has been referenced but not yet given a value/address is
+ considered to be undefined. */
+ is_defined =
+ symbolP != NULL
+ && (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
+ && S_GET_SEGMENT (symbolP) != reg_section;
- initialize_cframe (&cframe);
- cframe.ignoring = cframe.dead_tree || !((symbolP != 0) ^ arg);
- current_cframe = ((struct conditional_frame *)
- obstack_copy (&cond_obstack, &cframe,
- sizeof (cframe)));
+ cframe.ignoring = ! (test_defined ^ is_defined);
+ }
- if (LISTING_SKIP_COND ()
- && cframe.ignoring
- && (cframe.previous_cframe == NULL
- || ! cframe.previous_cframe->ignoring))
- listing_list (2);
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, &cframe, sizeof cframe);
- demand_empty_rest_of_line ();
- } /* if a valid identifyer name */
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ demand_empty_rest_of_line ();
}
void
-s_if (arg)
- int arg;
+s_if (int arg)
{
expressionS operand;
struct conditional_frame cframe;
int t;
char *stop = NULL;
- char stopc;
+ char stopc = 0;
if (flag_mri)
stop = mri_comment_field (&stopc);
}
else
{
- expression (&operand);
+ expression_and_evaluate (&operand);
if (operand.X_op != O_constant)
as_bad (_("non-constant expression in \".if\" statement"));
}
using an undefined result. No big deal. */
initialize_cframe (&cframe);
cframe.ignoring = cframe.dead_tree || ! t;
- current_cframe = ((struct conditional_frame *)
- obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, & cframe, sizeof cframe);
if (LISTING_SKIP_COND ()
&& cframe.ignoring
demand_empty_rest_of_line ();
}
+/* Performs the .ifb (test_blank == 1) and
+ the .ifnb (test_blank == 0) pseudo op. */
+
+void
+s_ifb (int test_blank)
+{
+ struct conditional_frame cframe;
+
+ initialize_cframe (&cframe);
+
+ if (cframe.dead_tree)
+ cframe.ignoring = 1;
+ else
+ {
+ int is_eol;
+
+ SKIP_WHITESPACE ();
+ is_eol = is_end_of_line[(unsigned char) *input_line_pointer];
+ cframe.ignoring = (test_blank == !is_eol);
+ }
+
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, &cframe, sizeof cframe);
+
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ ignore_rest_of_line ();
+}
+
/* Get a string for the MRI IFC or IFNC pseudo-ops. */
static char *
-get_mri_string (terminator, len)
- int terminator;
- int *len;
+get_mri_string (int terminator, int *len)
{
char *ret;
char *s;
/* The MRI IFC and IFNC pseudo-ops. */
void
-s_ifc (arg)
- int arg;
+s_ifc (int arg)
{
char *stop = NULL;
- char stopc;
+ char stopc = 0;
char *s1, *s2;
int len1, len2;
int res;
initialize_cframe (&cframe);
cframe.ignoring = cframe.dead_tree || ! (res ^ arg);
- current_cframe = ((struct conditional_frame *)
- obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
-
- if (LISTING_SKIP_COND ()
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, &cframe, sizeof cframe);
+
+ if (LISTING_SKIP_COND ()
&& cframe.ignoring
&& (cframe.previous_cframe == NULL
|| ! cframe.previous_cframe->ignoring))
}
void
-s_elseif (arg)
- int arg;
+s_elseif (int arg)
{
if (current_cframe == NULL)
{
as_bad (_("\".elseif\" after \".else\""));
as_bad_where (current_cframe->else_file_line.file,
current_cframe->else_file_line.line,
- _("here is the previous \"else\""));
+ _("here is the previous \".else\""));
as_bad_where (current_cframe->if_file_line.file,
current_cframe->if_file_line.line,
- _("here is the previous \"if\""));
+ _("here is the previous \".if\""));
}
else
{
- as_where (¤t_cframe->else_file_line.file,
- ¤t_cframe->else_file_line.line);
+ current_cframe->else_file_line.file
+ = as_where (¤t_cframe->else_file_line.line);
current_cframe->dead_tree |= !current_cframe->ignoring;
current_cframe->ignoring = current_cframe->dead_tree;
/* Leading whitespace is part of operand. */
SKIP_WHITESPACE ();
- expression (&operand);
+ expression_and_evaluate (&operand);
if (operand.X_op != O_constant)
as_bad (_("non-constant expression in \".elseif\" statement"));
}
void
-s_endif (arg)
- int arg ATTRIBUTE_UNUSED;
+s_endif (int arg ATTRIBUTE_UNUSED)
{
struct conditional_frame *hold;
}
void
-s_else (arg)
- int arg ATTRIBUTE_UNUSED;
+s_else (int arg ATTRIBUTE_UNUSED)
{
if (current_cframe == NULL)
{
}
else if (current_cframe->else_seen)
{
- as_bad (_("duplicate \"else\""));
+ as_bad (_("duplicate \".else\""));
as_bad_where (current_cframe->else_file_line.file,
current_cframe->else_file_line.line,
- _("here is the previous \"else\""));
+ _("here is the previous \".else\""));
as_bad_where (current_cframe->if_file_line.file,
current_cframe->if_file_line.line,
- _("here is the previous \"if\""));
+ _("here is the previous \".if\""));
}
else
{
- as_where (¤t_cframe->else_file_line.file,
- ¤t_cframe->else_file_line.line);
+ current_cframe->else_file_line.file
+ = as_where (¤t_cframe->else_file_line.line);
current_cframe->ignoring =
current_cframe->dead_tree | !current_cframe->ignoring;
}
void
-s_ifeqs (arg)
- int arg;
+s_ifeqs (int arg)
{
char *s1, *s2;
int len1, len2;
initialize_cframe (&cframe);
cframe.ignoring = cframe.dead_tree || ! (res ^ arg);
- current_cframe = ((struct conditional_frame *)
- obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
+ current_cframe =
+ (struct conditional_frame *) obstack_alloc (&cond_obstack, sizeof cframe);
+ memcpy (current_cframe, &cframe, sizeof cframe);
if (LISTING_SKIP_COND ()
&& cframe.ignoring
}
int
-ignore_input ()
+ignore_input (void)
{
char *s;
}
static void
-initialize_cframe (cframe)
- struct conditional_frame *cframe;
+initialize_cframe (struct conditional_frame *cframe)
{
memset (cframe, 0, sizeof (*cframe));
- as_where (&cframe->if_file_line.file,
- &cframe->if_file_line.line);
+ cframe->if_file_line.file
+ = as_where (&cframe->if_file_line.line);
cframe->previous_cframe = current_cframe;
cframe->dead_tree = current_cframe != NULL && current_cframe->ignoring;
cframe->macro_nest = macro_nest;
negative, we are being called at the of the input files. */
void
-cond_finish_check (nest)
- int nest;
+cond_finish_check (int nest)
{
if (current_cframe != NULL && current_cframe->macro_nest >= nest)
{
as_bad (_("end of macro inside conditional"));
else
as_bad (_("end of file inside conditional"));
+
as_bad_where (current_cframe->if_file_line.file,
current_cframe->if_file_line.line,
_("here is the start of the unterminated conditional"));
nested, and just pop them off the stack. */
void
-cond_exit_macro (nest)
- int nest;
+cond_exit_macro (int nest)
{
while (current_cframe != NULL && current_cframe->macro_nest >= nest)
{
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