/* read.c - read a source file -
- Copyright (C) 1986-2016 Free Software Foundation, Inc.
+ Copyright (C) 1986-2018 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
02110-1301, USA. */
/* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
- But then, GNU isn't spozed to run on your machine anyway.
+ But then, GNU isn't supposed to run on your machine anyway.
(RMS is so shortsighted sometimes.) */
#define MASK_CHAR ((int)(unsigned char) -1)
#endif
char *input_line_pointer; /*->next char of source file to parse. */
+bfd_boolean input_from_string = FALSE;
#if BITS_PER_CHAR != 8
/* The following table is indexed by[(char)] and will break if
{"noformat", s_ignore, 0},
{"nolist", listing_list, 0}, /* Turn listing off. */
{"nopage", listing_nopage, 0},
+ {"nops", s_nops, 0},
{"octa", cons, 16},
{"offset", s_struct, 0},
{"org", s_org, 0},
/* Make sure this hasn't pushed the locked sequence
past the bundle size. */
unsigned int bundle_size = pending_bundle_size (bundle_lock_frag);
- if (bundle_size > (1U << bundle_align_p2))
- as_bad (_("\
-.bundle_lock sequence at %u bytes but .bundle_align_mode limit is %u bytes"),
+ if (bundle_size > 1U << bundle_align_p2)
+ as_bad (_ (".bundle_lock sequence at %u bytes, "
+ "but .bundle_align_mode limit is %u bytes"),
bundle_size, 1U << bundle_align_p2);
}
else if (bundle_align_p2 > 0)
{
unsigned int insn_size = pending_bundle_size (insn_start_frag);
- if (insn_size > (1U << bundle_align_p2))
- as_bad (_("\
-single instruction is %u bytes long but .bundle_align_mode limit is %u"),
- (unsigned int) insn_size, 1U << bundle_align_p2);
+ if (insn_size > 1U << bundle_align_p2)
+ as_bad (_("single instruction is %u bytes long, "
+ "but .bundle_align_mode limit is %u bytes"),
+ insn_size, 1U << bundle_align_p2);
finish_bundle (insn_start_frag, insn_size);
}
if (mbstowcs (NULL, name, len) == (size_t) -1)
as_warn (_("symbol name not recognised in the current locale"));
}
- else if (is_name_beginner (c) || c == '\001')
+ else if (is_name_beginner (c) || (input_from_string && c == FAKE_LABEL_CHAR))
{
ptrdiff_t len;
name = input_line_pointer - 1;
- /* We accept \001 in a name in case this is
+ /* We accept FAKE_LABEL_CHAR in a name in case this is
being called with a constructed string. */
while (is_part_of_name (c = *input_line_pointer++)
- || c == '\001')
+ || (input_from_string && c == FAKE_LABEL_CHAR))
;
len = (input_line_pointer - name) - 1;
md_cons_align (1);
#endif
- get_known_segmented_expression (&rep_exp);
+ expression (&rep_exp);
if (*input_line_pointer == ',')
{
input_line_pointer++;
void
s_rept (int ignore ATTRIBUTE_UNUSED)
{
- int count;
+ size_t count;
- count = get_absolute_expression ();
+ count = (size_t) get_absolute_expression ();
do_repeat (count, "REPT", "ENDR");
}
different directives to be used as the start/end keys. */
void
-do_repeat (int count, const char *start, const char *end)
+do_repeat (size_t count, const char *start, const char *end)
{
sb one;
sb many;
+ if (((ssize_t) count) < 0)
+ {
+ as_bad (_("negative count for %s - ignored"), start);
+ count = 0;
+ }
+
sb_new (&one);
if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
{
}
/* Like do_repeat except that any text matching EXPANDER in the
- block is replaced by the itteration count. */
+ block is replaced by the iteration count. */
void
-do_repeat_with_expander (int count,
+do_repeat_with_expander (size_t count,
const char * start,
const char * end,
const char * expander)
sb one;
sb many;
+ if (((ssize_t) count) < 0)
+ {
+ as_bad (_("negative count for %s - ignored"), start);
+ count = 0;
+ }
+
sb_new (&one);
if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
{
sb_build (& processed, one.len);
sb_add_sb (& processed, & one);
sub = strstr (processed.ptr, expander);
- len = sprintf (sub, "%d", count);
+ len = sprintf (sub, "%lu", (unsigned long) count);
gas_assert (len < 8);
strcpy (sub + len, sub + 8);
processed.len -= (8 - len);
{
offsetT i;
- if (mult == 0)
- mult = 1;
- bytes = mult * exp.X_add_number;
- for (i = 0; i < exp.X_add_number; i++)
- emit_expr (&val, mult);
+ /* PR 20901: Check for excessive values.
+ FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
+ if (exp.X_add_number < 0 || exp.X_add_number > (1 << 10))
+ as_bad (_("size value for space directive too large: %lx"),
+ (long) exp.X_add_number);
+ else
+ {
+ if (mult == 0)
+ mult = 1;
+ bytes = mult * exp.X_add_number;
+
+ for (i = 0; i < exp.X_add_number; i++)
+ emit_expr (&val, mult);
+ }
}
}
else
mri_comment_end (stop, stopc);
}
+void
+s_nops (int ignore ATTRIBUTE_UNUSED)
+{
+ expressionS exp;
+ expressionS val;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+#ifdef md_cons_align
+ md_cons_align (1);
+#endif
+
+ expression (&exp);
+
+ if (*input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ expression (&val);
+ }
+ else
+ {
+ val.X_op = O_constant;
+ val.X_add_number = 0;
+ }
+
+ if (val.X_op == O_constant)
+ {
+ if (val.X_add_number < 0)
+ {
+ as_warn (_("negative nop control byte, ignored"));
+ val.X_add_number = 0;
+ }
+
+ if (!need_pass_2)
+ {
+ /* Store the no-op instruction control byte in the first byte
+ of frag. */
+ char *p;
+ symbolS *sym = make_expr_symbol (&exp);
+ p = frag_var (rs_space_nop, 1, 1, (relax_substateT) 0,
+ sym, (offsetT) 0, (char *) 0);
+ *p = val.X_add_number;
+ }
+ }
+ else
+ as_bad (_("unsupported variable nop control in .nops directive"));
+
+ demand_empty_rest_of_line ();
+}
+
/* This is like s_space, but the value is a floating point number with
the given precision. This is for the MRI dcb.s pseudo-op and
friends. */
symbolS *s = exp.X_add_symbol;
if (S_IS_COMMON (s))
- as_bad (_("`%s' can't be equated to common symbol '%s'"),
+ as_bad (_("`%s' can't be equated to common symbol `%s'"),
S_GET_NAME (symbolP), S_GET_NAME (s));
S_SET_SEGMENT (symbolP, seg);
case O_constant:
exp.X_add_symbol = section_symbol (now_seg);
exp.X_op = O_symbol;
- /* Fall thru */
+ /* Fallthru */
case O_symbol:
if (exp.X_add_number == 0)
{
reloc->u.a.offset_sym = exp.X_add_symbol;
break;
}
- /* Fall thru */
+ /* Fallthru */
default:
reloc->u.a.offset_sym = make_expr_symbol (&exp);
break;
}
if (i < exp->X_add_number)
- as_warn (_("bignum truncated to %d bytes"), nbytes);
+ as_warn (ngettext ("bignum truncated to %d byte",
+ "bignum truncated to %d bytes",
+ nbytes),
+ nbytes);
size = nbytes;
}
if (size > nbytes)
{
- as_bad (_("%s relocations do not fit in %u bytes\n"),
+ as_bad (ngettext ("%s relocations do not fit in %u byte",
+ "%s relocations do not fit in %u bytes",
+ nbytes),
reloc_howto->name, nbytes);
return;
}
if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
{
- as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
+ as_warn (ngettext ("field width %lu too big to fit in %d byte:"
+ " truncated to %d bits",
+ "field width %lu too big to fit in %d bytes:"
+ " truncated to %d bits",
+ nbytes),
width, nbytes, (BITS_PER_CHAR * nbytes));
width = BITS_PER_CHAR * nbytes;
} /* Too big. */
else if (op == O_big)
{
/* O_big is a different sort of constant. */
-
+ int nbr_digits = exp->X_add_number;
unsigned int size;
char *p;
- size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
+ /* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
+ a signed number. Unary operators like - or ~ always extend the
+ bignum to its largest size. */
+ if (exp->X_unsigned
+ && nbr_digits < SIZE_OF_LARGE_NUMBER
+ && generic_bignum[nbr_digits - 1] == LITTLENUM_MASK)
+ generic_bignum[nbr_digits++] = 0;
+
+ size = output_big_leb128 (NULL, generic_bignum, nbr_digits, sign);
p = frag_more (size);
- if (output_big_leb128 (p, generic_bignum, exp->X_add_number, sign) > size)
+ if (output_big_leb128 (p, generic_bignum, nbr_digits, sign) > size)
abort ();
}
else
do
{
- expression (&exp);
+ deferred_expression (&exp);
emit_leb128_expr (&exp, sign);
}
while (*input_line_pointer++ == ',');
c = *input_line_pointer++ & CHAR_MASK;
switch (c)
{
+ case 0:
+ /* PR 20902: Do not advance past the end of the buffer. */
+ -- input_line_pointer;
+ c = NOT_A_CHAR;
+ break;
+
case '\"':
c = NOT_A_CHAR;
break;
bump_line_counters ();
break;
+ case 0:
+ /* Do not advance past the end of the buffer. */
+ -- input_line_pointer;
+ c = NOT_A_CHAR;
+ break;
+
default:
#ifdef ONLY_STANDARD_ESCAPES
size = pending_bundle_size (bundle_lock_frag);
- if (size > (1U << bundle_align_p2))
- as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
- size, 1 << bundle_align_p2);
+ if (size > 1U << bundle_align_p2)
+ as_bad (_(".bundle_lock sequence is %u bytes, "
+ "but bundle size is only %u bytes"),
+ size, 1u << bundle_align_p2);
else
finish_bundle (bundle_lock_frag, size);
{
return _find_end_of_line (s, mri_string, 0, 0);
}
+
+static char *saved_ilp = NULL;
+static char *saved_limit;
+
+/* Use BUF as a temporary input pointer for calling other functions in this
+ file. BUF must be a C string, so that its end can be found by strlen.
+ Also sets the buffer_limit variable (local to this file) so that buffer
+ overruns should not occur. Saves the current input line pointer so that
+ it can be restored by calling restore_ilp().
+
+ Does not support recursion.
+
+ FIXME: This function is currently only used by stabs.c but that
+ should be extended to other files in the gas source directory. */
+
+void
+temp_ilp (char *buf)
+{
+ gas_assert (saved_ilp == NULL);
+ gas_assert (buf != NULL);
+
+ saved_ilp = input_line_pointer;
+ saved_limit = buffer_limit;
+ /* Prevent the assert in restore_ilp from triggering if
+ the input_line_pointer has not yet been initialised. */
+ if (saved_ilp == NULL)
+ saved_limit = saved_ilp = (char *) "";
+
+ input_line_pointer = buf;
+ buffer_limit = buf + strlen (buf);
+ input_from_string = TRUE;
+}
+
+/* Restore a saved input line pointer. */
+
+void
+restore_ilp (void)
+{
+ gas_assert (saved_ilp != NULL);
+
+ input_line_pointer = saved_ilp;
+ buffer_limit = saved_limit;
+ input_from_string = FALSE;
+
+ saved_ilp = NULL;
+}