X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gas%2Fread.c;h=a940ff3af9291669a63cca10249d2564988fe7ba;hb=8b8c7c9f49992750f66f81b4601d593a3858d98c;hp=2d5fdf1fdd4ddc3512cce0a408cebd6f3672ae00;hpb=1e53931944810798e6741f664bd3ec727272fe11;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/read.c b/gas/read.c index 2d5fdf1fdd..a940ff3af9 100644 --- a/gas/read.c +++ b/gas/read.c @@ -1,5 +1,5 @@ /* read.c - read a source file - - Copyright (C) 1986-2014 Free Software Foundation, Inc. + Copyright (C) 1986-2016 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. @@ -41,7 +41,7 @@ #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. */ @@ -166,7 +166,7 @@ int target_big_endian = TARGET_BYTES_BIG_ENDIAN; /* Variables for handling include file directory table. */ /* Table of pointers to directories to search for .include's. */ -char **include_dirs; +const char **include_dirs; /* How many are in the table. */ int include_dir_count; @@ -238,7 +238,6 @@ static unsigned int bundle_lock_depth; #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); @@ -487,6 +486,7 @@ static offsetT get_absolute_expr (expressionS *exp) { expression_and_evaluate (exp); + if (exp->X_op != O_constant) { if (exp->X_op != O_absent) @@ -557,10 +557,11 @@ pobegin (void) cfi_pop_insert (); } -#define HANDLE_CONDITIONAL_ASSEMBLY() \ +#define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \ if (ignore_input ()) \ { \ - char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \ + char *eol = find_end_of_line (input_line_pointer - (num_read), \ + flag_m68k_mri); \ input_line_pointer = (input_line_pointer <= buffer_limit \ && eol >= buffer_limit) \ ? buffer_limit \ @@ -684,7 +685,8 @@ finish_bundle (fragS *frag, unsigned int size) /* 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 @@ -735,12 +737,82 @@ single instruction is %u bytes long but .bundle_align_mode limit is %u"), #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. */ + +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) +read_a_source_file (const char *name) { - char c; + char nul_char; + char next_char; char *s; /* String of symbol, '\0' appended. */ int temp; pseudo_typeS *pop; @@ -807,7 +879,7 @@ read_a_source_file (char *name) /* Copy it for safe keeping. Also give an indication of how much macro nesting is involved at this point. */ len = s - input_line_pointer; - copy = (char *) xmalloc (len + macro_nest + 2); + copy = XNEWVEC (char, len + macro_nest + 2); memset (copy, '>', macro_nest); copy[macro_nest] = ' '; memcpy (copy + macro_nest + 1, input_line_pointer, len); @@ -827,16 +899,18 @@ read_a_source_file (char *name) 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 (); + 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. */ @@ -870,8 +944,7 @@ read_a_source_file (char *name) 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); @@ -881,8 +954,8 @@ read_a_source_file (char *name) (valueT) 0, &zero_address_frag); - *input_line_pointer = c; - if (c == ':') + next_char = restore_line_pointer (nul_char); + if (next_char == ':') input_line_pointer++; } } @@ -897,30 +970,32 @@ read_a_source_file (char *name) 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 (); + 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; @@ -939,27 +1014,27 @@ read_a_source_file (char *name) } 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 ) { @@ -999,7 +1074,7 @@ read_a_source_file (char *name) { /* 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 '.'. */ @@ -1044,25 +1119,25 @@ read_a_source_file (char *name) { 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. @@ -1076,16 +1151,16 @@ read_a_source_file (char *name) } 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) @@ -1101,7 +1176,12 @@ read_a_source_file (char *name) 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. */ @@ -1111,17 +1191,20 @@ read_a_source_file (char *name) } /* 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 (); + 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)) @@ -1155,9 +1238,9 @@ read_a_source_file (char *name) } 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; @@ -1188,7 +1271,7 @@ read_a_source_file (char *name) that goes with this #APP There is one. The specs guarantee it... */ tmp_len = buffer_limit - s; - tmp_buf = (char *) xmalloc (tmp_len + 1); + tmp_buf = XNEWVEC (char, tmp_len + 1); memcpy (tmp_buf, s, tmp_len); do { @@ -1204,7 +1287,7 @@ read_a_source_file (char *name) else num = buffer_limit - buffer; - tmp_buf = (char *) xrealloc (tmp_buf, tmp_len + num); + tmp_buf = XRESIZEVEC (char, tmp_buf, tmp_len + num); memcpy (tmp_buf + tmp_len, buffer, num); tmp_len += num; } @@ -1225,7 +1308,7 @@ read_a_source_file (char *name) scrub_string_end = ends; new_length = ends - s; - new_buf = (char *) xmalloc (new_length); + new_buf = XNEWVEC (char, new_length); new_tmp = new_buf; for (;;) { @@ -1241,7 +1324,7 @@ read_a_source_file (char *name) break; } - new_buf = (char *) xrealloc (new_buf, new_length + 100); + new_buf = XRESIZEVEC (char, new_buf, new_length + 100); new_tmp = new_buf + new_length; new_length += 100; } @@ -1266,10 +1349,10 @@ read_a_source_file (char *name) continue; } - HANDLE_CONDITIONAL_ASSEMBLY (); + HANDLE_CONDITIONAL_ASSEMBLY (1); #ifdef tc_unrecognized_line - if (tc_unrecognized_line (c)) + if (tc_unrecognized_line (next_char)) continue; #endif input_line_pointer--; @@ -1385,58 +1468,6 @@ s_abort (int ignore ATTRIBUTE_UNUSED) 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 @@ -1446,14 +1477,14 @@ do_align (int n, char *fill, int len, int max) #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) @@ -1470,6 +1501,11 @@ s_align (int arg, int bytes_p) { align = get_absolute_expression (); SKIP_WHITESPACE (); + +#ifdef TC_ALIGN_ZERO_IS_DEFAULT + if (arg > 0 && align == 0) + align = arg; +#endif } if (bytes_p) @@ -1528,15 +1564,16 @@ s_align (int arg, int 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); @@ -1546,7 +1583,12 @@ s_align (int arg, int bytes_p) 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); } @@ -1578,7 +1620,7 @@ s_align_ptwo (int arg) /* Switch in and out of alternate macro mode. */ -void +static void s_altmacro (int on) { demand_empty_rest_of_line (); @@ -1599,7 +1641,7 @@ s_altmacro (int on) If a symbol name could not be read, the routine issues an error messages, skips to the end of the line and returns NULL. */ -static char * +char * read_symbol_name (void) { char * name; @@ -1615,7 +1657,7 @@ read_symbol_name (void) char * name_end; unsigned int C; - start = name = xmalloc (len + 1); + start = name = XNEWVEC (char, len + 1); name_end = name + SYM_NAME_CHUNK_LEN; @@ -1627,7 +1669,7 @@ read_symbol_name (void) sofar = name - start; len += SYM_NAME_CHUNK_LEN; - start = xrealloc (start, len + 1); + start = XRESIZEVEC (char, start, len + 1); name_end = start + len; name = start + sofar; } @@ -1655,7 +1697,7 @@ read_symbol_name (void) ; len = (input_line_pointer - name) - 1; - start = xmalloc (len + 1); + start = XNEWVEC (char, len + 1); memcpy (start, name, len); start[len] = 0; @@ -1704,7 +1746,7 @@ s_comm_internal (int param, temp = get_absolute_expr (&exp); size = temp; - size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1; + size &= ((addressT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1; if (exp.X_op == O_absent) { as_bad (_("missing size expression")); @@ -1794,7 +1836,7 @@ s_mri_common (int small ATTRIBUTE_UNUSED) name = input_line_pointer; if (!ISDIGIT (*name)) - c = get_symbol_end (); + c = get_symbol_name (& name); else { do @@ -1808,16 +1850,15 @@ s_mri_common (int small ATTRIBUTE_UNUSED) if (line_label != NULL) { - alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) - + (input_line_pointer - name) - + 1); + alc = XNEWVEC (char, strlen (S_GET_NAME (line_label)) + + (input_line_pointer - name) + 1); sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); name = alc; } } sym = symbol_find_or_make (name); - *input_line_pointer = c; + c = restore_line_pointer (c); if (alc != NULL) free (alc); @@ -2095,7 +2136,7 @@ s_errwarn (int err) 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 + const char *msg = (err ? _(".error directive invoked in source file") : _(".warning directive invoked in source file")); @@ -2194,6 +2235,20 @@ s_fill (int ignore ATTRIBUTE_UNUSED) 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, @@ -2292,13 +2347,14 @@ s_globl (int ignore ATTRIBUTE_UNUSED) 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); @@ -2337,8 +2393,7 @@ s_linkonce (int ignore ATTRIBUTE_UNUSED) 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) @@ -2350,7 +2405,7 @@ s_linkonce (int ignore ATTRIBUTE_UNUSED) else as_warn (_("unrecognized .linkonce type `%s'"), s); - *input_line_pointer = c; + (void) restore_line_pointer (c); } #ifdef obj_handle_link_once @@ -2391,7 +2446,7 @@ s_linkonce (int ignore ATTRIBUTE_UNUSED) } 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; @@ -2415,7 +2470,7 @@ bss_alloc (symbolS *symbolP, addressT size, int align) #endif subseg_set (bss_seg, 1); - if (align) + if (align > OCTETS_PER_BYTE_POWER) { record_alignment (bss_seg, align); frag_align (align, 0, 0); @@ -2628,13 +2683,14 @@ get_macro_line_sb (sb *line) 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); @@ -2765,6 +2821,10 @@ do_org (segT segment, expressionS *exp, int fill) 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. */ @@ -2844,7 +2904,7 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) name = input_line_pointer; if (!ISDIGIT (*name)) - c = get_symbol_end (); + c = get_symbol_name (& name); else { do @@ -2859,13 +2919,13 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) 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 (); @@ -2918,16 +2978,15 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) 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 { @@ -2935,8 +2994,7 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) ++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) @@ -2947,7 +3005,7 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) *type = 'R'; else as_warn (_("unrecognized section type `%s'"), sectype); - *input_line_pointer = c; + (void) restore_line_pointer (c); } if (*input_line_pointer == ',') @@ -2956,8 +3014,7 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) ++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")); @@ -2967,16 +3024,16 @@ s_mri_sect (char *type ATTRIBUTE_UNUSED) } 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); } } @@ -3022,11 +3079,10 @@ s_purgem (int ignore ATTRIBUTE_UNUSED) 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++ == ','); @@ -3181,7 +3237,7 @@ assign_symbol (char *name, int mode) if (listing & LISTING_SYMBOLS) { extern struct list_info_struct *listing_tail; - fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS)); + fragS *dummy_frag = XCNEW (fragS); dummy_frag->line = listing_tail; dummy_frag->fr_symbol = symbolP; symbol_set_frag (symbolP, dummy_frag); @@ -3199,7 +3255,9 @@ assign_symbol (char *name, int mode) && !S_CAN_BE_REDEFINED (symbolP)) { as_bad (_("symbol `%s' is already defined"), name); - symbolP = symbol_clone (symbolP, 0); + ignore_rest_of_line (); + input_line_pointer--; + return; } /* If the symbol is volatile, copy the symbol and replace the original with the copy, so that previous uses of the symbol will @@ -3323,10 +3381,11 @@ s_space (int mult) 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) @@ -3367,6 +3426,8 @@ s_space (int mult) /* 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; } @@ -3404,7 +3465,10 @@ s_space (int mult) 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; } @@ -3479,7 +3543,7 @@ s_float_space (int float_type) } else { - char *err; + const char *err; err = md_atof (float_type, temp, &flen); know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); @@ -3931,12 +3995,14 @@ cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */ 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); } @@ -3983,7 +4049,7 @@ s_rva (int size) /* .reloc offset, reloc_name, symbol+addend. */ -void +static void s_reloc (int ignore ATTRIBUTE_UNUSED) { char *stop = NULL; @@ -3992,8 +4058,17 @@ s_reloc (int ignore ATTRIBUTE_UNUSED) 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)); + reloc = XNEW (struct reloc_list); if (flag_mri) stop = mri_comment_field (&stopc); @@ -4032,9 +4107,21 @@ s_reloc (int ignore ATTRIBUTE_UNUSED) ++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) { @@ -4043,7 +4130,7 @@ s_reloc (int ignore ATTRIBUTE_UNUSED) } exp.X_op = O_absent; - SKIP_WHITESPACE (); + SKIP_WHITESPACE_AFTER_NAME (); if (*input_line_pointer == ',') { ++input_line_pointer; @@ -4079,7 +4166,7 @@ s_reloc (int ignore ATTRIBUTE_UNUSED) break; } - as_where (&reloc->file, &reloc->line); + reloc->file = as_where (&reloc->line); reloc->next = reloc_list; reloc_list = reloc; @@ -4183,15 +4270,6 @@ emit_expr_with_reloc (expressionS *exp, 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 @@ -4241,6 +4319,20 @@ emit_expr_with_reloc (expressionS *exp, 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) @@ -4256,7 +4348,7 @@ emit_expr_with_reloc (expressionS *exp, { struct broken_word *x; - x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); + x = XNEW (struct broken_word); x->next_broken_word = broken_words; broken_words = x; x->seg = now_seg; @@ -4320,7 +4412,8 @@ emit_expr_with_reloc (expressionS *exp, if ((get & mask) != 0 && ((get & mask) != mask || (get & hibit) == 0)) - { /* Leading bits contain both 0s & 1s. */ + { + /* Leading bits contain both 0s & 1s. */ #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG #ifndef __MSVCRT__ as_warn (_("value 0x%llx truncated to 0x%llx"), @@ -4346,16 +4439,34 @@ emit_expr_with_reloc (expressionS *exp, if (nbytes < size) { int i = nbytes / CHARS_PER_LITTLENUM; + if (i != 0) { LITTLENUM_TYPE sign = 0; if ((generic_bignum[--i] & (1 << (LITTLENUM_NUMBER_OF_BITS - 1))) != 0) sign = ~(LITTLENUM_TYPE) 0; + while (++i < exp->X_add_number) if (generic_bignum[i] != sign) break; } + else if (nbytes == 1) + { + /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably). + Check that bits 8.. of generic_bignum[0] match bit 7 + and that they match all of generic_bignum[1..exp->X_add_number]. */ + LITTLENUM_TYPE sign = (generic_bignum[0] & (1 << 7)) ? -1 : 0; + LITTLENUM_TYPE himask = LITTLENUM_MASK & ~ 0xFF; + + if ((generic_bignum[0] & himask) == (sign & himask)) + { + while (++i < exp->X_add_number) + if (generic_bignum[i] != sign) + break; + } + } + if (i < exp->X_add_number) as_warn (_("bignum truncated to %d bytes"), nbytes); size = nbytes; @@ -4484,9 +4595,7 @@ emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p, BITFIELD_CONS_EXPRESSIONS. */ static void -parse_bitfield_cons (exp, nbytes) - expressionS *exp; - unsigned int nbytes; +parse_bitfield_cons (expressionS *exp, unsigned int nbytes) { unsigned int bits_available = BITS_PER_CHAR * nbytes; char *hold = input_line_pointer; @@ -4572,7 +4681,7 @@ parse_bitfield_cons (exp, nbytes) 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 @@ -4671,9 +4780,7 @@ parse_mri_cons (expressionS *exp, unsigned int nbytes) To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ static void -parse_repeat_cons (exp, nbytes) - expressionS *exp; - unsigned int nbytes; +parse_repeat_cons (expressionS *exp, unsigned int nbytes) { expressionS count; int i; @@ -4815,7 +4922,7 @@ float_cons (/* Clobbers input_line-pointer, checks end-of-line. */ { char *p; int length; /* Number of chars in an object. */ - char *err; /* Error from scanning floating literal. */ + const char *err; /* Error from scanning floating literal. */ char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; if (is_it_end_of_statement ()) @@ -4824,6 +4931,21 @@ float_cons (/* Clobbers input_line-pointer, checks end-of-line. */ 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 @@ -4907,9 +5029,25 @@ float_cons (/* Clobbers input_line-pointer, checks end-of-line. */ demand_empty_rest_of_line (); } -/* 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; @@ -4930,7 +5068,7 @@ sizeof_sleb128 (offsetT value) return size; } -static inline int +static inline unsigned int sizeof_uleb128 (valueT value) { int size = 0; @@ -4945,7 +5083,7 @@ sizeof_uleb128 (valueT value) return size; } -int +unsigned int sizeof_leb128 (valueT value, int sign) { if (sign) @@ -4954,9 +5092,9 @@ sizeof_leb128 (valueT value, int 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; @@ -4983,7 +5121,7 @@ output_sleb128 (char *p, offsetT value) return p - orig; } -static inline int +static inline unsigned int output_uleb128 (char *p, valueT value) { char *orig = p; @@ -4991,6 +5129,7 @@ output_uleb128 (char *p, valueT value) do { unsigned byte = (value & 0x7f); + value >>= 7; if (value != 0) /* More bytes to follow. */ @@ -5003,7 +5142,7 @@ output_uleb128 (char *p, valueT value) return p - orig; } -int +unsigned int output_leb128 (char *p, valueT value, int sign) { if (sign) @@ -5014,10 +5153,11 @@ output_leb128 (char *p, valueT value, int 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; @@ -5062,7 +5202,7 @@ output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size) { /* Sign-extend VAL. */ if (val & (1 << (loaded - 1))) - val |= ~0 << loaded; + val |= ~0U << loaded; if (orig) *p = val & 0x7f; p++; @@ -5071,8 +5211,8 @@ output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size) 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; @@ -5110,8 +5250,8 @@ output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size) 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); @@ -5120,7 +5260,7 @@ output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign) } /* 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) @@ -5156,6 +5296,18 @@ 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; @@ -5172,23 +5324,25 @@ emit_leb128_expr (expressionS *exp, int sign) /* 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 { @@ -5225,6 +5379,10 @@ s_leb128 (int sign) 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); @@ -5280,6 +5438,15 @@ stringer (int bits_appendzero) 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 '\"'. @@ -5294,14 +5461,6 @@ stringer (int bits_appendzero) { 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 == '"') { @@ -5385,7 +5544,7 @@ next_char_of_string (void) #ifndef NO_STRING_ESCAPES case '\\': - switch (c = *input_line_pointer++) + switch (c = *input_line_pointer++ & CHAR_MASK) { case 'b': c = '\b'; @@ -5436,7 +5595,7 @@ next_char_of_string (void) number = number * 8 + c - '0'; } - c = number & 0xff; + c = number & CHAR_MASK; } --input_line_pointer; break; @@ -5458,7 +5617,7 @@ next_char_of_string (void) number = number * 16 + c - 'a' + 10; c = *input_line_pointer++; } - c = number & 0xff; + c = number & CHAR_MASK; --input_line_pointer; } break; @@ -5696,7 +5855,7 @@ s_incbin (int x ATTRIBUTE_UNUSED) { int i; - path = (char *) xmalloc ((unsigned long) len + include_dir_maxlen + 5); + path = XNEWVEC (char, (unsigned long) len + include_dir_maxlen + 5); for (i = 0; i < include_dir_count; i++) { @@ -5799,8 +5958,8 @@ s_include (int arg ATTRIBUTE_UNUSED) } demand_empty_rest_of_line (); - path = (char *) xmalloc ((unsigned long) i - + include_dir_maxlen + 5 /* slop */ ); + path = XNEWVEC (char, (unsigned long) i + + include_dir_maxlen + 5 /* slop */ ); for (i = 0; i < include_dir_count; i++) { @@ -5829,16 +5988,15 @@ add_include_dir (char *path) if (include_dir_count == 0) { - include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); + include_dirs = XNEWVEC (const char *, 2); include_dirs[0] = "."; /* Current dir. */ include_dir_count = 2; } else { include_dir_count++; - include_dirs = - (char **) xrealloc (include_dirs, - include_dir_count * sizeof (*include_dirs)); + include_dirs = XRESIZEVEC (const char *, include_dirs, + include_dir_count); } include_dirs[include_dir_count - 1] = path; /* New one. */ @@ -5930,11 +6088,10 @@ do_s_func (int end_p, const char *default_prefix) 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) @@ -5960,10 +6117,9 @@ do_s_func (int end_p, const char *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) @@ -6138,7 +6294,7 @@ _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED, } if (inquote) as_warn (_("missing closing `%c'"), inquote); - if (inescape) + if (inescape && !ignore_input ()) as_warn (_("stray `\\'")); return s; }