/* read.c - read a source file -
Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
static void do_align (int, char *, int, int);
static void s_align (int, int);
+static void s_altmacro (int);
static int hex_float (int, char *);
static segT get_known_segmented_expression (expressionS * expP);
static void pobegin (void);
static const pseudo_typeS potable[] = {
{"abort", s_abort, 0},
{"align", s_align_ptwo, 0},
+ {"altmacro", s_altmacro, 1},
{"ascii", stringer, 0},
{"asciz", stringer, 1},
{"balign", s_align_bytes, 0},
{"equ", s_set, 0},
{"equiv", s_set, 1},
{"err", s_err, 0},
+ {"error", s_errwarn, 1},
{"exitm", s_mexit, 0},
/* extend */
{"extern", s_ignore, 0}, /* We treat all undef as ext. */
{"mri", s_mri, 0},
{".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
{"name", s_ignore, 0},
+ {"noaltmacro", s_altmacro, 0},
{"noformat", s_ignore, 0},
{"nolist", listing_list, 0}, /* Turn listing off. */
{"nopage", listing_nopage, 0},
{"xdef", s_globl, 0},
{"xref", s_ignore, 0},
{"xstabs", s_xstab, 's'},
+ {"warning", s_errwarn, 0},
{"word", cons, 2},
{"zero", s_space, 0},
{NULL, NULL, 0} /* End sentinel. */
#endif
}
+/* Convert O_constant expression EXP into the equivalent O_big representation.
+ Take the sign of the number from X_unsigned rather than X_add_number. */
+
+static void
+convert_to_bignum (expressionS *exp)
+{
+ valueT value;
+ unsigned int i;
+
+ value = exp->X_add_number;
+ for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
+ {
+ generic_bignum[i] = value & LITTLENUM_MASK;
+ value >>= LITTLENUM_NUMBER_OF_BITS;
+ }
+ /* Add a sequence of sign bits if the top bit of X_add_number is not
+ the sign of the original value. */
+ if ((exp->X_add_number < 0) != !exp->X_unsigned)
+ generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
+ exp->X_op = O_big;
+ exp->X_add_number = i;
+}
+
/* For most MRI pseudo-ops, the line actually ends at the first
nonquoted space. This function looks for that point, stuffs a null
in, and sets *STOPCP to the character that used to be there, and
len = 0;
}
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
#ifdef md_do_align
md_do_align (n, fill, len, max, just_record_alignment);
#endif
fill pattern. BYTES_P is non-zero if the alignment value should be
interpreted as the byte boundary, rather than the power of 2. */
+#ifdef BFD_ASSEMBLER
+#define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
+#else
+#define ALIGN_LIMIT 15
+#endif
+
static void
s_align (int arg, int bytes_p)
{
- register unsigned int align;
+ unsigned int align_limit = ALIGN_LIMIT;
+ unsigned int align;
char *stop = NULL;
char stopc;
offsetT fill = 0;
}
}
- if (align > 15)
+ if (align > align_limit)
{
- align = 15;
+ align = align_limit;
as_warn (_("alignment too large: %u assumed"), align);
}
s_align (arg, 0);
}
+/* Switch in and out of alternate macro mode. */
+
+void
+s_altmacro (int on)
+{
+ demand_empty_rest_of_line ();
+ macro_set_alternate (on);
+}
+
symbolS *
s_comm_internal (int param,
symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
if (*input_line_pointer == ',')
input_line_pointer++;
- *p = 0;
temp = get_absolute_expr (&exp);
size = temp;
#ifdef BFD_ASSEMBLER
if (exp.X_op == O_absent)
{
as_bad (_("missing size expression"));
- *p = c;
ignore_rest_of_line ();
goto out;
}
else if (temp != size || !exp.X_unsigned)
{
as_warn (_("size (%ld) out of range, ignored"), (long) temp);
- *p = c;
ignore_rest_of_line ();
goto out;
}
+ *p = 0;
symbolP = symbol_find_or_make (name);
if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
{
.file. */
void
-s_app_file_string (char *file)
+s_app_file_string (char *file, int appfile)
{
#ifdef LISTING
if (listing)
#endif
register_dependency (file);
#ifdef obj_app_file
- obj_app_file (file);
+ obj_app_file (file, appfile);
#endif
}
demand_empty_rest_of_line ();
if (!may_omit)
- s_app_file_string (s);
+ s_app_file_string (s, appfile);
}
}
demand_empty_rest_of_line ();
}
+/* Handle the .error and .warning pseudo-ops. */
+
+void
+s_errwarn (int err)
+{
+ int len;
+ /* The purpose for the conditional assignment is not to
+ internationalize the directive itself, but that we need a
+ self-contained message, one that can be passed like the
+ demand_copy_C_string return value, and with no assumption on the
+ location of the name of the directive within the message. */
+ char *msg
+ = (err ? _(".error directive invoked in source file")
+ : _(".warning directive invoked in source file"));
+
+ if (!is_it_end_of_statement ())
+ {
+ if (*input_line_pointer != '\"')
+ {
+ as_bad (_("%s argument must be a string"),
+ err ? ".error" : ".warning");
+ discard_rest_of_line ();
+ return;
+ }
+
+ msg = demand_copy_C_string (&len);
+ if (msg == NULL)
+ return;
+ }
+
+ if (err)
+ as_bad ("%s", msg);
+ else
+ as_warn ("%s", msg);
+ demand_empty_rest_of_line ();
+}
+
/* Handle the MRI fail pseudo-op. */
void
pass to md_number_to_chars, handle it as a bignum. */
if (op == O_constant && nbytes > sizeof (valueT))
{
- valueT val;
- int gencnt;
-
- if (!exp->X_unsigned && exp->X_add_number < 0)
- extra_digit = (valueT) -1;
- val = (valueT) exp->X_add_number;
- gencnt = 0;
- do
- {
- generic_bignum[gencnt] = val & LITTLENUM_MASK;
- val >>= LITTLENUM_NUMBER_OF_BITS;
- ++gencnt;
- }
- while (val != 0);
- op = exp->X_op = O_big;
- exp->X_add_number = gencnt;
+ extra_digit = exp->X_unsigned ? 0 : -1;
+ convert_to_bignum (exp);
+ op = O_big;
}
if (op == O_constant)
unsigned byte;
/* Strip leading sign extensions off the bignum. */
- while (size > 0 && bignum[size - 1] == (LITTLENUM_TYPE) -1)
+ while (size > 1
+ && bignum[size - 1] == LITTLENUM_MASK
+ && bignum[size - 2] > LITTLENUM_MASK / 2)
size--;
do
{
- if (loaded < 7 && size > 0)
- {
- val |= (*bignum << loaded);
- loaded += 8 * CHARS_PER_LITTLENUM;
- size--;
- bignum++;
- }
-
- byte = val & 0x7f;
- loaded -= 7;
- val >>= 7;
+ /* OR in the next part of the littlenum. */
+ val |= (*bignum << loaded);
+ loaded += LITTLENUM_NUMBER_OF_BITS;
+ size--;
+ bignum++;
- if (size == 0)
+ /* Add bytes until there are less than 7 bits left in VAL
+ or until every non-sign bit has been written. */
+ do
{
- if ((val == 0 && (byte & 0x40) == 0)
- || (~(val | ~(((valueT) 1 << loaded) - 1)) == 0
- && (byte & 0x40) != 0))
+ byte = val & 0x7f;
+ loaded -= 7;
+ val >>= 7;
+ if (size > 0
+ || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
byte |= 0x80;
+
+ if (orig)
+ *p = byte;
+ p++;
}
+ while ((byte & 0x80) != 0 && loaded >= 7);
+ }
+ while (size > 0);
+ /* Mop up any left-over bits (of which there will be less than 7). */
+ if ((byte & 0x80) != 0)
+ {
+ /* Sign-extend VAL. */
+ if (val & (1 << (loaded - 1)))
+ val |= ~0 << loaded;
if (orig)
- *p = byte;
+ *p = val & 0x7f;
p++;
}
- while (byte & 0x80);
return p - orig;
}
as_warn (_("register value used as expression"));
op = O_constant;
}
+ else if (op == O_constant
+ && sign
+ && (exp->X_add_number < 0) != !exp->X_unsigned)
+ {
+ /* We're outputting a signed leb128 and the sign of X_add_number
+ doesn't reflect the sign of the original value. Convert EXP
+ to a correctly-extended bignum instead. */
+ convert_to_bignum (exp);
+ op = O_big;
+ }
/* Let check_eh_frame know that data is being emitted. nbytes == -1 is
a signal that this is leb128 data. It shouldn't optimize this away. */
}
file_len = ftell (binfile);
- /* If a count was not specified use the size of the file. */
+ /* If a count was not specified use the remainder of the file. */
if (count == 0)
- count = file_len;
+ count = file_len - skip;
- if (skip + count > file_len)
+ if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
{
- as_bad (_("skip (%ld) + count (%ld) larger than file size (%ld)"),
+ as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
skip, count, file_len);
goto done;
}
projects / deliverable / binutils-gdb.git / blobdiff