/* read.c - read a source file -
- Copyright (C) 1986-2015 Free Software Foundation, Inc.
+ Copyright (C) 1986-2016 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#include "wchar.h"
#ifndef TC_START_LABEL
-#define TC_START_LABEL(x,y,z) (x == ':')
+#define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
#endif
/* Set by the object-format or the target. */
#endif
static void do_s_func (int end_p, const char *default_prefix);
-static void do_align (int, char *, int, int);
static void s_align (int, int);
static void s_altmacro (int);
static void s_bad_end (int);
get_absolute_expr (expressionS *exp)
{
expression_and_evaluate (exp);
+
if (exp->X_op != O_constant)
{
if (exp->X_op != O_absent)
/* We do this every time rather than just in s_bundle_align_mode
so that we catch any affected section without needing hooks all
over for all paths that do section changes. It's cheap enough. */
- record_alignment (now_seg, bundle_align_p2 - OCTETS_PER_BYTE_POWER);
+ if (bundle_align_p2 > OCTETS_PER_BYTE_POWER)
+ record_alignment (now_seg, bundle_align_p2 - OCTETS_PER_BYTE_POWER);
}
/* Assemble one instruction. This takes care of the bundle features
#endif /* HANDLE_BUNDLE */
+static bfd_boolean
+in_bss (void)
+{
+ flagword flags = bfd_get_section_flags (stdoutput, now_seg);
+
+ return (flags & SEC_ALLOC) && !(flags & (SEC_LOAD | SEC_HAS_CONTENTS));
+}
+
+/* Guts of .align directive:
+ N is the power of two to which to align. A value of zero is accepted but
+ ignored: the default alignment of the section will be at least this.
+ FILL may be NULL, or it may point to the bytes of the fill pattern.
+ LEN is the length of whatever FILL points to, if anything. If LEN is zero
+ but FILL is not NULL then LEN is treated as if it were one.
+ MAX is the maximum number of characters to skip when doing the alignment,
+ or 0 if there is no maximum. */
+
+static void
+do_align (unsigned int n, char *fill, unsigned int len, unsigned int max)
+{
+ if (now_seg == absolute_section || in_bss ())
+ {
+ if (fill != NULL)
+ while (len-- > 0)
+ if (*fill++ != '\0')
+ {
+ if (now_seg == absolute_section)
+ as_warn (_("ignoring fill value in absolute section"));
+ else
+ as_warn (_("ignoring fill value in section `%s'"),
+ segment_name (now_seg));
+ break;
+ }
+ fill = NULL;
+ 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
+
+ /* Only make a frag if we HAVE to... */
+ if ((n > OCTETS_PER_BYTE_POWER) && !need_pass_2)
+ {
+ if (fill == NULL)
+ {
+ if (subseg_text_p (now_seg))
+ frag_align_code (n, max);
+ else
+ frag_align (n, 0, max);
+ }
+ else if (len <= 1)
+ frag_align (n, *fill, max);
+ else
+ frag_align_pattern (n, fill, len, max);
+ }
+
+#ifdef md_do_align
+ just_record_alignment: ATTRIBUTE_UNUSED_LABEL
+#endif
+
+ if (n > OCTETS_PER_BYTE_POWER)
+ record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
+}
+
/* We read the file, putting things into a web that represents what we
have been reading. */
void
read_a_source_file (char *name)
{
- char c;
+ char nul_char;
+ char next_char;
char *s; /* String of symbol, '\0' appended. */
int temp;
pseudo_typeS *pop;
if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
{
+ next_char = * input_line_pointer;
/* Text at the start of a line must be a label, we
run down and stick a colon in. */
- if (is_name_beginner (*input_line_pointer))
+ if (is_name_beginner (next_char) || next_char == '"')
{
- char *line_start = input_line_pointer;
+ char *line_start;
int mri_line_macro;
HANDLE_CONDITIONAL_ASSEMBLY (0);
- c = get_symbol_end ();
+ nul_char = get_symbol_name (& line_start);
+ next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
/* In MRI mode, the EQU and MACRO pseudoops must
be handled specially. */
symbol in the symbol table. */
if (!mri_line_macro
#ifdef TC_START_LABEL_WITHOUT_COLON
- && TC_START_LABEL_WITHOUT_COLON(c,
- input_line_pointer)
+ && TC_START_LABEL_WITHOUT_COLON (nul_char, next_char)
#endif
)
line_label = colon (line_start);
(valueT) 0,
&zero_address_frag);
- *input_line_pointer = c;
- if (c == ':')
+ next_char = restore_line_pointer (nul_char);
+ if (next_char == ':')
input_line_pointer++;
}
}
Each test is independent of all other tests at the (top)
level. */
do
- c = *input_line_pointer++;
- while (c == '\t' || c == ' ' || c == '\f');
+ nul_char = next_char = *input_line_pointer++;
+ while (next_char == '\t' || next_char == ' ' || next_char == '\f');
/* C is the 1st significant character.
Input_line_pointer points after that character. */
- if (is_name_beginner (c))
+ if (is_name_beginner (next_char) || next_char == '"')
{
+ char *rest;
+
/* Want user-defined label or pseudo/opcode. */
HANDLE_CONDITIONAL_ASSEMBLY (1);
- s = --input_line_pointer;
- c = get_symbol_end (); /* name's delimiter. */
+ --input_line_pointer;
+ nul_char = get_symbol_name (& s); /* name's delimiter. */
+ next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
+ rest = input_line_pointer + (nul_char == '"' ? 2 : 1);
- /* C is character after symbol.
- That character's place in the input line is now '\0'.
+ /* NEXT_CHAR is character after symbol.
+ The end of symbol in the input line is now '\0'.
S points to the beginning of the symbol.
[In case of pseudo-op, s->'.'.]
- Input_line_pointer->'\0' where c was. */
- if (TC_START_LABEL (c, s, input_line_pointer))
+ Input_line_pointer->'\0' where NUL_CHAR was. */
+ if (TC_START_LABEL (s, nul_char, next_char))
{
if (flag_m68k_mri)
{
- char *rest = input_line_pointer + 1;
-
/* In MRI mode, \tsym: set 0 is permitted. */
if (*rest == ':')
++rest;
}
line_label = colon (s); /* User-defined label. */
- /* Put ':' back for error messages' sake. */
- *input_line_pointer++ = ':';
+ restore_line_pointer (nul_char);
+ ++ input_line_pointer;
#ifdef tc_check_label
tc_check_label (line_label);
#endif
/* Input_line_pointer->after ':'. */
SKIP_WHITESPACE ();
}
- else if ((c == '=' && input_line_pointer[1] == '=')
- || ((c == ' ' || c == '\t')
- && input_line_pointer[1] == '='
- && input_line_pointer[2] == '='))
+ else if ((next_char == '=' && *rest == '=')
+ || ((next_char == ' ' || next_char == '\t')
+ && rest[0] == '='
+ && rest[1] == '='))
{
equals (s, -1);
demand_empty_rest_of_line ();
}
- else if ((c == '='
- || ((c == ' ' || c == '\t')
- && input_line_pointer[1] == '='))
+ else if ((next_char == '='
+ || ((next_char == ' ' || next_char == '\t')
+ && *rest == '='))
#ifdef TC_EQUAL_IN_INSN
- && !TC_EQUAL_IN_INSN (c, s)
+ && !TC_EQUAL_IN_INSN (next_char, s)
#endif
)
{
{
/* PSEUDO - OP.
- WARNING: c has next char, which may be end-of-line.
+ WARNING: next_char may be end-of-line.
We lookup the pseudo-op table with s+1 because we
already know that the pseudo-op begins with a '.'. */
{
char *end = input_line_pointer;
- *input_line_pointer = c;
+ (void) restore_line_pointer (nul_char);
s_ignore (0);
- c = *--input_line_pointer;
+ nul_char = next_char = *--input_line_pointer;
*input_line_pointer = '\0';
- if (! macro_defined || ! try_macro (c, s))
+ if (! macro_defined || ! try_macro (next_char, s))
{
*end = '\0';
as_bad (_("unknown pseudo-op: `%s'"), s);
- *input_line_pointer++ = c;
+ *input_line_pointer++ = nul_char;
}
continue;
}
/* Put it back for error messages etc. */
- *input_line_pointer = c;
+ next_char = restore_line_pointer (nul_char);
/* The following skip of whitespace is compulsory.
A well shaped space is sometimes all that separates
keyword from operands. */
- if (c == ' ' || c == '\t')
+ if (next_char == ' ' || next_char == '\t')
input_line_pointer++;
/* Input_line is restored.
}
else
{
- /* WARNING: c has char, which may be end-of-line. */
- /* Also: input_line_pointer->`\0` where c was. */
- *input_line_pointer = c;
+ /* WARNING: next_char may be end-of-line. */
+ /* Also: input_line_pointer->`\0` where nul_char was. */
+ (void) restore_line_pointer (nul_char);
input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
- c = *input_line_pointer;
+ next_char = nul_char = *input_line_pointer;
*input_line_pointer = '\0';
generate_lineno_debug ();
- if (macro_defined && try_macro (c, s))
+ if (macro_defined && try_macro (next_char, s))
continue;
if (mri_pending_align)
assemble_one (s); /* Assemble 1 instruction. */
- *input_line_pointer++ = c;
+ /* PR 19630: The backend may have set ilp to NULL
+ if it encountered a catastrophic failure. */
+ if (input_line_pointer == NULL)
+ as_fatal (_("unable to continue with assembly."));
+
+ *input_line_pointer++ = nul_char;
/* We resume loop AFTER the end-of-line from
this instruction. */
}
/* Empty statement? */
- if (is_end_of_line[(unsigned char) c])
+ if (is_end_of_line[(unsigned char) next_char])
continue;
- if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
+ if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (next_char))
{
/* local label ("4:") */
char *backup = input_line_pointer;
HANDLE_CONDITIONAL_ASSEMBLY (1);
- temp = c - '0';
+ temp = next_char - '0';
+
+ if (nul_char == '"')
+ ++ input_line_pointer;
/* Read the whole number. */
while (ISDIGIT (*input_line_pointer))
}
input_line_pointer = backup;
- } /* local label ("4:") */
+ }
- if (c && strchr (line_comment_chars, c))
+ if (next_char && strchr (line_comment_chars, next_char))
{ /* Its a comment. Better say APP or NO_APP. */
sb sbuf;
char *ends;
HANDLE_CONDITIONAL_ASSEMBLY (1);
#ifdef tc_unrecognized_line
- if (tc_unrecognized_line (c))
+ if (tc_unrecognized_line (next_char))
continue;
#endif
input_line_pointer--;
as_fatal (_(".abort detected. Abandoning ship."));
}
-/* Guts of .align directive. N is the power of two to which to align.
- FILL may be NULL, or it may point to the bytes of the fill pattern.
- LEN is the length of whatever FILL points to, if anything. MAX is
- the maximum number of characters to skip when doing the alignment,
- or 0 if there is no maximum. */
-
-static void
-do_align (int n, char *fill, int len, int max)
-{
- if (now_seg == absolute_section)
- {
- if (fill != NULL)
- while (len-- > 0)
- if (*fill++ != '\0')
- {
- as_warn (_("ignoring fill value in absolute section"));
- break;
- }
- fill = NULL;
- 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
-
- /* Only make a frag if we HAVE to... */
- if (n != 0 && !need_pass_2)
- {
- if (fill == NULL)
- {
- if (subseg_text_p (now_seg))
- frag_align_code (n, max);
- else
- frag_align (n, 0, max);
- }
- else if (len <= 1)
- frag_align (n, *fill, max);
- else
- frag_align_pattern (n, fill, len, max);
- }
-
-#ifdef md_do_align
- just_record_alignment: ATTRIBUTE_UNUSED_LABEL
-#endif
-
- record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
-}
-
/* Handle the .align pseudo-op. A positive ARG is a default alignment
(in bytes). A negative ARG is the negative of the length of the
fill pattern. BYTES_P is non-zero if the alignment value should be
#endif
static void
-s_align (int arg, int bytes_p)
+s_align (signed int arg, int bytes_p)
{
unsigned int align_limit = TC_ALIGN_LIMIT;
unsigned int align;
char *stop = NULL;
char stopc = 0;
offsetT fill = 0;
- int max;
+ unsigned int max;
int fill_p;
if (flag_mri)
{
align = get_absolute_expression ();
SKIP_WHITESPACE ();
+
+#ifdef TC_ALIGN_ZERO_IS_DEFAULT
+ if (arg > 0 && align == 0)
+ align = arg;
+#endif
}
if (bytes_p)
}
else
{
- int fill_len;
+ unsigned int fill_len;
if (arg >= 0)
fill_len = 1;
else
fill_len = -arg;
+
if (fill_len <= 1)
{
- char fill_char;
+ char fill_char = 0;
fill_char = fill;
do_align (align, &fill_char, fill_len, max);
char ab[16];
if ((size_t) fill_len > sizeof ab)
- abort ();
+ {
+ as_warn (_("fill pattern too long, truncating to %u"),
+ (unsigned) sizeof ab);
+ fill_len = sizeof ab;
+ }
+
md_number_to_chars (ab, fill, fill_len);
do_align (align, ab, fill_len, max);
}
name = input_line_pointer;
if (!ISDIGIT (*name))
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
else
{
do
}
sym = symbol_find_or_make (name);
- *input_line_pointer = c;
+ c = restore_line_pointer (c);
if (alc != NULL)
free (alc);
if (size && !need_pass_2)
{
+ if (now_seg == absolute_section)
+ {
+ if (rep_exp.X_op != O_constant)
+ as_bad (_("non-constant fill count for absolute section"));
+ else if (fill && rep_exp.X_add_number != 0)
+ as_bad (_("attempt to fill absolute section with non-zero value"));
+ abs_section_offset += rep_exp.X_add_number * size;
+ }
+ else if (fill
+ && (rep_exp.X_op != O_constant || rep_exp.X_add_number != 0)
+ && in_bss ())
+ as_bad (_("attempt to fill section `%s' with non-zero value"),
+ segment_name (now_seg));
+
if (rep_exp.X_op == O_constant)
{
p = frag_var (rs_fill, (int) size, (int) size,
void
s_irp (int irpc)
{
- char *file, *eol;
+ char * eol;
+ const char * file;
unsigned int line;
sb s;
const char *err;
sb out;
- as_where (&file, &line);
+ file = as_where (&line);
eol = find_end_of_line (input_line_pointer, 0);
sb_build (&s, eol - input_line_pointer);
char *s;
char c;
- s = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& s);
if (strcasecmp (s, "discard") == 0)
type = LINKONCE_DISCARD;
else if (strcasecmp (s, "one_only") == 0)
else
as_warn (_("unrecognized .linkonce type `%s'"), s);
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
}
#ifdef obj_handle_link_once
}
void
-bss_alloc (symbolS *symbolP, addressT size, int align)
+bss_alloc (symbolS *symbolP, addressT size, unsigned int align)
{
char *pfrag;
segT current_seg = now_seg;
#endif
subseg_set (bss_seg, 1);
- if (align)
+ if (align > OCTETS_PER_BYTE_POWER)
{
record_alignment (bss_seg, align);
frag_align (align, 0, 0);
void
s_macro (int ignore ATTRIBUTE_UNUSED)
{
- char *file, *eol;
+ char *eol;
+ const char * file;
unsigned int line;
sb s;
const char *err;
const char *name;
- as_where (&file, &line);
+ file = as_where (&line);
eol = find_end_of_line (input_line_pointer, 0);
sb_build (&s, eol - input_line_pointer);
symbolS *sym = exp->X_add_symbol;
offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
+ if (fill && in_bss ())
+ as_warn (_("ignoring fill value in section `%s'"),
+ segment_name (now_seg));
+
if (exp->X_op != O_constant && exp->X_op != O_symbol)
{
/* Handle complex expressions. */
name = input_line_pointer;
if (!ISDIGIT (*name))
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
else
{
do
name = xstrdup (name);
- *input_line_pointer = c;
+ c = restore_line_pointer (c);
seg = subseg_new (name, 0);
- if (*input_line_pointer == ',')
+ if (c == ',')
{
- int align;
+ unsigned int align;
++input_line_pointer;
align = get_absolute_expression ();
SKIP_WHITESPACE ();
- name = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
name = xstrdup (name);
- *input_line_pointer = c;
+ c = restore_line_pointer (c);
seg = subseg_new (name, 0);
- if (*input_line_pointer != ',')
+ if (c != ',')
*type = 'C';
else
{
++input_line_pointer;
SKIP_WHITESPACE ();
- sectype = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& sectype);
if (*sectype == '\0')
*type = 'C';
else if (strcasecmp (sectype, "text") == 0)
*type = 'R';
else
as_warn (_("unrecognized section type `%s'"), sectype);
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
}
if (*input_line_pointer == ',')
++input_line_pointer;
SKIP_WHITESPACE ();
- seccmd = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& seccmd);
if (strcasecmp (seccmd, "absolute") == 0)
{
as_bad (_("absolute sections are not supported"));
}
else if (strcasecmp (seccmd, "align") == 0)
{
- int align;
+ unsigned int align;
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
align = get_absolute_expression ();
record_alignment (seg, align);
}
else
{
as_warn (_("unrecognized section command `%s'"), seccmd);
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
}
}
char c;
SKIP_WHITESPACE ();
- name = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
delete_macro (name);
*input_line_pointer = c;
- SKIP_WHITESPACE ();
+ SKIP_WHITESPACE_AFTER_NAME ();
}
while (*input_line_pointer++ == ',');
val.X_add_number = 0;
}
- if (val.X_op != O_constant
- || val.X_add_number < - 0x80
- || val.X_add_number > 0xff
- || (mult != 0 && mult != 1 && val.X_add_number != 0))
+ if ((val.X_op != O_constant
+ || val.X_add_number < - 0x80
+ || val.X_add_number > 0xff
+ || (mult != 0 && mult != 1 && val.X_add_number != 0))
+ && (now_seg != absolute_section && !in_bss ()))
{
resolve_expression (&exp);
if (exp.X_op != O_constant)
/* If we are in the absolute section, just bump the offset. */
if (now_seg == absolute_section)
{
+ if (val.X_op != O_constant || val.X_add_number != 0)
+ as_warn (_("ignoring fill value in absolute section"));
abs_section_offset += repeat;
goto getout;
}
make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
}
- if (p)
+ if ((val.X_op != O_constant || val.X_add_number != 0) && in_bss ())
+ as_warn (_("ignoring fill value in section `%s'"),
+ segment_name (now_seg));
+ else if (p)
*p = val.X_add_number;
}
else
#endif
{
+#if 0
if (*input_line_pointer == '"')
{
as_bad (_("unexpected `\"' in expression"));
ignore_rest_of_line ();
return;
}
+#endif
ret = TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
}
char *r_name;
int c;
struct reloc_list *reloc;
+ struct _bfd_rel { const char * name; bfd_reloc_code_real_type code; };
+ static struct _bfd_rel bfd_relocs[] =
+ {
+ { "NONE", BFD_RELOC_NONE },
+ { "8", BFD_RELOC_8 },
+ { "16", BFD_RELOC_16 },
+ { "32", BFD_RELOC_32 },
+ { "64", BFD_RELOC_64 }
+ };
reloc = (struct reloc_list *) xmalloc (sizeof (*reloc));
++input_line_pointer;
SKIP_WHITESPACE ();
- r_name = input_line_pointer;
- c = get_symbol_end ();
- reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
+ c = get_symbol_name (& r_name);
+ if (strncasecmp (r_name, "BFD_RELOC_", 10) == 0)
+ {
+ unsigned int i;
+
+ for (reloc->u.a.howto = NULL, i = 0; i < ARRAY_SIZE (bfd_relocs); i++)
+ if (strcasecmp (r_name + 10, bfd_relocs[i].name) == 0)
+ {
+ reloc->u.a.howto = bfd_reloc_type_lookup (stdoutput,
+ bfd_relocs[i].code);
+ break;
+ }
+ }
+ else
+ reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
*input_line_pointer = c;
if (reloc->u.a.howto == NULL)
{
}
exp.X_op = O_absent;
- SKIP_WHITESPACE ();
+ SKIP_WHITESPACE_AFTER_NAME ();
if (*input_line_pointer == ',')
{
++input_line_pointer;
break;
}
- as_where (&reloc->file, &reloc->line);
+ reloc->file = as_where (&reloc->line);
reloc->next = reloc_list;
reloc_list = reloc;
op = exp->X_op;
- /* Allow `.word 0' in the absolute section. */
- if (now_seg == absolute_section)
- {
- if (op != O_constant || exp->X_add_number != 0)
- as_bad (_("attempt to store value in absolute section"));
- abs_section_offset += nbytes;
- return;
- }
-
/* Handle a negative bignum. */
if (op == O_uminus
&& exp->X_add_number == 0
op = O_constant;
}
+ /* Allow `.word 0' in the absolute section. */
+ if (now_seg == absolute_section)
+ {
+ if (op != O_constant || exp->X_add_number != 0)
+ as_bad (_("attempt to store value in absolute section"));
+ abs_section_offset += nbytes;
+ return;
+ }
+
+ /* Allow `.word 0' in BSS style sections. */
+ if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
+ as_bad (_("attempt to store non-zero value in section `%s'"),
+ segment_name (now_seg));
+
p = frag_more ((int) nbytes);
if (reloc != TC_PARSE_CONS_RETURN_NONE)
return;
} /* Too complex. */
- value |= ((~(-1 << width) & exp->X_add_number)
+ value |= ((~(-(1 << width)) & exp->X_add_number)
<< ((BITS_PER_CHAR * nbytes) - bits_available));
if ((bits_available -= width) == 0
return;
}
+ if (now_seg == absolute_section)
+ {
+ as_bad (_("attempt to store float in absolute section"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ if (in_bss ())
+ {
+ as_bad (_("attempt to store float in section `%s'"),
+ segment_name (now_seg));
+ ignore_rest_of_line ();
+ return;
+ }
+
#ifdef md_flush_pending_output
md_flush_pending_output ();
#endif
demand_empty_rest_of_line ();
}
\f
-/* Return the size of a LEB128 value. */
+/* LEB128 Encoding.
-static inline int
+ Note - we are using the DWARF standard's definition of LEB128 encoding
+ where each 7-bit value is a stored in a byte, *not* an octet. This
+ means that on targets where a byte contains multiple octets there is
+ a *huge waste of space*. (This also means that we do not have to
+ have special versions of these functions for when OCTETS_PER_BYTE_POWER
+ is non-zero).
+
+ If the 7-bit values were to be packed into N-bit bytes (where N > 8)
+ we would then have to consider whether multiple, successive LEB128
+ values should be packed into the bytes without padding (bad idea) or
+ whether each LEB128 number is padded out to a whole number of bytes.
+ Plus you have to decide on the endianness of packing octets into a
+ byte. */
+
+/* Return the size of a LEB128 value in bytes. */
+
+static inline unsigned int
sizeof_sleb128 (offsetT value)
{
int size = 0;
return size;
}
-static inline int
+static inline unsigned int
sizeof_uleb128 (valueT value)
{
int size = 0;
return size;
}
-int
+unsigned int
sizeof_leb128 (valueT value, int sign)
{
if (sign)
return sizeof_uleb128 (value);
}
-/* Output a LEB128 value. */
+/* Output a LEB128 value. Returns the number of bytes used. */
-static inline int
+static inline unsigned int
output_sleb128 (char *p, offsetT value)
{
char *orig = p;
return p - orig;
}
-static inline int
+static inline unsigned int
output_uleb128 (char *p, valueT value)
{
char *orig = p;
do
{
unsigned byte = (value & 0x7f);
+
value >>= 7;
if (value != 0)
/* More bytes to follow. */
return p - orig;
}
-int
+unsigned int
output_leb128 (char *p, valueT value, int sign)
{
if (sign)
/* Do the same for bignums. We combine sizeof with output here in that
we don't output for NULL values of P. It isn't really as critical as
- for "normal" values that this be streamlined. */
+ for "normal" values that this be streamlined. Returns the number of
+ bytes used. */
-static inline int
-output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
+static inline unsigned int
+output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
{
char *orig = p;
valueT val = 0;
{
/* Sign-extend VAL. */
if (val & (1 << (loaded - 1)))
- val |= ~0 << loaded;
+ val |= ~0U << loaded;
if (orig)
*p = val & 0x7f;
p++;
return p - orig;
}
-static inline int
-output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
+static inline unsigned int
+output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
{
char *orig = p;
valueT val = 0;
return p - orig;
}
-static int
-output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
+static unsigned int
+output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size, int sign)
{
if (sign)
return output_big_sleb128 (p, bignum, size);
}
/* Generate the appropriate fragments for a given expression to emit a
- leb128 value. */
+ leb128 value. SIGN is 1 for sleb, 0 for uleb. */
static void
emit_leb128_expr (expressionS *exp, int sign)
op = O_big;
}
+ if (now_seg == absolute_section)
+ {
+ if (op != O_constant || exp->X_add_number != 0)
+ as_bad (_("attempt to store value in absolute section"));
+ abs_section_offset++;
+ return;
+ }
+
+ if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
+ as_bad (_("attempt to store non-zero value in section `%s'"),
+ segment_name (now_seg));
+
/* 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. */
nbytes = (unsigned int) -1;
/* If we've got a constant, emit the thing directly right now. */
valueT value = exp->X_add_number;
- int size;
+ unsigned int size;
char *p;
size = sizeof_leb128 (value, sign);
p = frag_more (size);
- output_leb128 (p, value, sign);
+ if (output_leb128 (p, value, sign) > size)
+ abort ();
}
else if (op == O_big)
{
/* O_big is a different sort of constant. */
- int size;
+ unsigned int size;
char *p;
size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
p = frag_more (size);
- output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
+ if (output_big_leb128 (p, generic_bignum, exp->X_add_number, sign) > size)
+ abort ();
}
else
{
static void
stringer_append_char (int c, int bitsize)
{
+ if (c && in_bss ())
+ as_bad (_("attempt to store non-empty string in section `%s'"),
+ segment_name (now_seg));
+
if (!target_big_endian)
FRAG_APPEND_1_CHAR (c);
md_cons_align (1);
#endif
+ /* If we have been switched into the abs_section then we
+ will not have an obstack onto which we can hang strings. */
+ if (now_seg == absolute_section)
+ {
+ as_bad (_("strings must be placed into a section"));
+ ignore_rest_of_line ();
+ return;
+ }
+
/* The following awkward logic is to parse ZERO or more strings,
comma separated. Recall a string expression includes spaces
before the opening '\"' and spaces after the closing '\"'.
{
c = ','; /* Do loop. */
}
- /* If we have been switched into the abs_section then we
- will not have an obstack onto which we can hang strings. */
- if (now_seg == absolute_section)
- {
- as_bad (_("strings must be placed into a section"));
- c = 0;
- ignore_rest_of_line ();
- }
while (c == ',' || c == '<' || c == '"')
{
#ifndef NO_STRING_ESCAPES
case '\\':
- switch (c = *input_line_pointer++)
+ switch (c = *input_line_pointer++ & CHAR_MASK)
{
case 'b':
c = '\b';
number = number * 8 + c - '0';
}
- c = number & 0xff;
+ c = number & CHAR_MASK;
}
--input_line_pointer;
break;
number = number * 16 + c - 'a' + 10;
c = *input_line_pointer++;
}
- c = number & 0xff;
+ c = number & CHAR_MASK;
--input_line_pointer;
}
break;
return;
}
- name = input_line_pointer;
- delim1 = get_symbol_end ();
+ delim1 = get_symbol_name (& name);
name = xstrdup (name);
*input_line_pointer = delim1;
- SKIP_WHITESPACE ();
+ SKIP_WHITESPACE_AFTER_NAME ();
if (*input_line_pointer != ',')
{
if (default_prefix)
{
++input_line_pointer;
SKIP_WHITESPACE ();
- label = input_line_pointer;
- delim2 = get_symbol_end ();
+ delim2 = get_symbol_name (& label);
label = xstrdup (label);
- *input_line_pointer = delim2;
+ restore_line_pointer (delim2);
}
if (debug_type == DEBUG_STABS)
projects / external / binutils.git / blobdiff