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-rw-r--r--gas/config/obj-aout.c629
1 files changed, 629 insertions, 0 deletions
diff --git a/gas/config/obj-aout.c b/gas/config/obj-aout.c
new file mode 100644
index 0000000000..b5193475c1
--- /dev/null
+++ b/gas/config/obj-aout.c
@@ -0,0 +1,629 @@
+/* a.out object file format
+ Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 1996
+ 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) any later version.
+
+GAS is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+the GNU General Public License for more details.
+
+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. */
+
+#include "as.h"
+#ifdef BFD_ASSEMBLER
+#undef NO_RELOC
+#include "aout/aout64.h"
+#endif
+#include "obstack.h"
+
+#ifndef BFD_ASSEMBLER
+/* in: segT out: N_TYPE bits */
+const short seg_N_TYPE[] =
+{
+ N_ABS,
+ N_TEXT,
+ N_DATA,
+ N_BSS,
+ N_UNDF, /* unknown */
+ N_UNDF, /* error */
+ N_UNDF, /* expression */
+ N_UNDF, /* debug */
+ N_UNDF, /* ntv */
+ N_UNDF, /* ptv */
+ N_REGISTER, /* register */
+};
+
+const segT N_TYPE_seg[N_TYPE + 2] =
+{ /* N_TYPE == 0x1E = 32-2 */
+ SEG_UNKNOWN, /* N_UNDF == 0 */
+ SEG_GOOF,
+ SEG_ABSOLUTE, /* N_ABS == 2 */
+ SEG_GOOF,
+ SEG_TEXT, /* N_TEXT == 4 */
+ SEG_GOOF,
+ SEG_DATA, /* N_DATA == 6 */
+ SEG_GOOF,
+ SEG_BSS, /* N_BSS == 8 */
+ SEG_GOOF,
+ SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
+ SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
+ SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF,
+ SEG_REGISTER, /* dummy N_REGISTER for regs = 30 */
+ SEG_GOOF,
+};
+#endif
+
+static void obj_aout_line PARAMS ((int));
+static void obj_aout_weak PARAMS ((int));
+static void obj_aout_type PARAMS ((int));
+
+const pseudo_typeS obj_pseudo_table[] =
+{
+ {"line", obj_aout_line, 0}, /* source code line number */
+ {"ln", obj_aout_line, 0}, /* coff line number that we use anyway */
+
+ {"weak", obj_aout_weak, 0}, /* mark symbol as weak. */
+
+ {"type", obj_aout_type, 0},
+
+ /* coff debug pseudos (ignored) */
+ {"def", s_ignore, 0},
+ {"dim", s_ignore, 0},
+ {"endef", s_ignore, 0},
+ {"ident", s_ignore, 0},
+ {"line", s_ignore, 0},
+ {"ln", s_ignore, 0},
+ {"scl", s_ignore, 0},
+ {"size", s_ignore, 0},
+ {"tag", s_ignore, 0},
+ {"val", s_ignore, 0},
+ {"version", s_ignore, 0},
+
+ {"optim", s_ignore, 0}, /* For sun386i cc (?) */
+
+ /* other stuff */
+ {"ABORT", s_abort, 0},
+
+ {NULL} /* end sentinel */
+}; /* obj_pseudo_table */
+
+
+#ifdef BFD_ASSEMBLER
+
+void
+obj_aout_frob_symbol (sym, punt)
+ symbolS *sym;
+ int *punt;
+{
+ flagword flags;
+ asection *sec;
+ int desc, type, other;
+
+ flags = sym->bsym->flags;
+ desc = S_GET_DESC (sym);
+ type = S_GET_TYPE (sym);
+ other = S_GET_OTHER (sym);
+ sec = sym->bsym->section;
+
+ /* Only frob simple symbols this way right now. */
+ if (! (type & ~ (N_TYPE | N_EXT)))
+ {
+ if (type == (N_UNDF | N_EXT)
+ && sec == &bfd_abs_section)
+ sym->bsym->section = sec = bfd_und_section_ptr;
+
+ if ((type & N_TYPE) != N_INDR
+ && (type & N_TYPE) != N_SETA
+ && (type & N_TYPE) != N_SETT
+ && (type & N_TYPE) != N_SETD
+ && (type & N_TYPE) != N_SETB
+ && type != N_WARNING
+ && (sec == &bfd_abs_section
+ || sec == &bfd_und_section))
+ return;
+ if (flags & BSF_EXPORT)
+ type |= N_EXT;
+
+ switch (type & N_TYPE)
+ {
+ case N_SETA:
+ case N_SETT:
+ case N_SETD:
+ case N_SETB:
+ /* Set the debugging flag for constructor symbols so that
+ BFD leaves them alone. */
+ sym->bsym->flags |= BSF_DEBUGGING;
+
+ /* You can't put a common symbol in a set. The way a set
+ element works is that the symbol has a definition and a
+ name, and the linker adds the definition to the set of
+ that name. That does not work for a common symbol,
+ because the linker can't tell which common symbol the
+ user means. FIXME: Using as_bad here may be
+ inappropriate, since the user may want to force a
+ particular type without regard to the semantics of sets;
+ on the other hand, we certainly don't want anybody to be
+ mislead into thinking that their code will work. */
+ if (S_IS_COMMON (sym))
+ as_bad (_("Attempt to put a common symbol into set %s"),
+ S_GET_NAME (sym));
+ /* Similarly, you can't put an undefined symbol in a set. */
+ else if (! S_IS_DEFINED (sym))
+ as_bad (_("Attempt to put an undefined symbol into set %s"),
+ S_GET_NAME (sym));
+
+ break;
+ case N_INDR:
+ /* Put indirect symbols in the indirect section. */
+ sym->bsym->section = bfd_ind_section_ptr;
+ sym->bsym->flags |= BSF_INDIRECT;
+ if (type & N_EXT)
+ {
+ sym->bsym->flags |= BSF_EXPORT;
+ sym->bsym->flags &=~ BSF_LOCAL;
+ }
+ break;
+ case N_WARNING:
+ /* Mark warning symbols. */
+ sym->bsym->flags |= BSF_WARNING;
+ break;
+ }
+ }
+ else
+ {
+ sym->bsym->flags |= BSF_DEBUGGING;
+ }
+
+ S_SET_TYPE (sym, type);
+
+ /* Double check weak symbols. */
+ if (sym->bsym->flags & BSF_WEAK)
+ {
+ if (S_IS_COMMON (sym))
+ as_bad (_("Symbol `%s' can not be both weak and common"),
+ S_GET_NAME (sym));
+ }
+}
+
+void
+obj_aout_frob_file ()
+{
+ /* Relocation processing may require knowing the VMAs of the sections.
+ Since writing to a section will cause the BFD back end to compute the
+ VMAs, fake it out here.... */
+ bfd_byte b = 0;
+ boolean x = true;
+ if (bfd_section_size (stdoutput, text_section) != 0)
+ {
+ x = bfd_set_section_contents (stdoutput, text_section, &b, (file_ptr) 0,
+ (bfd_size_type) 1);
+ }
+ else if (bfd_section_size (stdoutput, data_section) != 0)
+ {
+ x = bfd_set_section_contents (stdoutput, data_section, &b, (file_ptr) 0,
+ (bfd_size_type) 1);
+ }
+ assert (x == true);
+}
+
+#else
+
+/* Relocation. */
+
+/*
+ * emit_relocations()
+ *
+ * Crawl along a fixS chain. Emit the segment's relocations.
+ */
+void
+obj_emit_relocations (where, fixP, segment_address_in_file)
+ char **where;
+ fixS *fixP; /* Fixup chain for this segment. */
+ relax_addressT segment_address_in_file;
+{
+ for (; fixP; fixP = fixP->fx_next)
+ if (fixP->fx_done == 0)
+ {
+ symbolS *sym;
+
+ sym = fixP->fx_addsy;
+ while (sym->sy_value.X_op == O_symbol
+ && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
+ sym = sym->sy_value.X_add_symbol;
+ fixP->fx_addsy = sym;
+
+ if (! sym->sy_resolved && ! S_IS_DEFINED (sym))
+ {
+ char *file;
+ unsigned int line;
+
+ if (expr_symbol_where (sym, &file, &line))
+ as_bad_where (file, line, _("unresolved relocation"));
+ else
+ as_bad (_("bad relocation: symbol `%s' not in symbol table"),
+ S_GET_NAME (sym));
+ }
+
+ tc_aout_fix_to_chars (*where, fixP, segment_address_in_file);
+ *where += md_reloc_size;
+ }
+}
+
+#ifndef obj_header_append
+/* Aout file generation & utilities */
+void
+obj_header_append (where, headers)
+ char **where;
+ object_headers *headers;
+{
+ tc_headers_hook (headers);
+
+#ifdef CROSS_COMPILE
+ md_number_to_chars (*where, headers->header.a_info, sizeof (headers->header.a_info));
+ *where += sizeof (headers->header.a_info);
+ md_number_to_chars (*where, headers->header.a_text, sizeof (headers->header.a_text));
+ *where += sizeof (headers->header.a_text);
+ md_number_to_chars (*where, headers->header.a_data, sizeof (headers->header.a_data));
+ *where += sizeof (headers->header.a_data);
+ md_number_to_chars (*where, headers->header.a_bss, sizeof (headers->header.a_bss));
+ *where += sizeof (headers->header.a_bss);
+ md_number_to_chars (*where, headers->header.a_syms, sizeof (headers->header.a_syms));
+ *where += sizeof (headers->header.a_syms);
+ md_number_to_chars (*where, headers->header.a_entry, sizeof (headers->header.a_entry));
+ *where += sizeof (headers->header.a_entry);
+ md_number_to_chars (*where, headers->header.a_trsize, sizeof (headers->header.a_trsize));
+ *where += sizeof (headers->header.a_trsize);
+ md_number_to_chars (*where, headers->header.a_drsize, sizeof (headers->header.a_drsize));
+ *where += sizeof (headers->header.a_drsize);
+
+#else /* CROSS_COMPILE */
+
+ append (where, (char *) &headers->header, sizeof (headers->header));
+#endif /* CROSS_COMPILE */
+
+}
+#endif
+
+void
+obj_symbol_to_chars (where, symbolP)
+ char **where;
+ symbolS *symbolP;
+{
+ md_number_to_chars ((char *) &(S_GET_OFFSET (symbolP)), S_GET_OFFSET (symbolP), sizeof (S_GET_OFFSET (symbolP)));
+ md_number_to_chars ((char *) &(S_GET_DESC (symbolP)), S_GET_DESC (symbolP), sizeof (S_GET_DESC (symbolP)));
+ md_number_to_chars ((char *) &(symbolP->sy_symbol.n_value), S_GET_VALUE (symbolP), sizeof (symbolP->sy_symbol.n_value));
+
+ append (where, (char *) &symbolP->sy_symbol, sizeof (obj_symbol_type));
+}
+
+void
+obj_emit_symbols (where, symbol_rootP)
+ char **where;
+ symbolS *symbol_rootP;
+{
+ symbolS *symbolP;
+
+ /* Emit all symbols left in the symbol chain. */
+ for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP))
+ {
+ /* Used to save the offset of the name. It is used to point
+ to the string in memory but must be a file offset. */
+ register char *temp;
+
+ temp = S_GET_NAME (symbolP);
+ S_SET_OFFSET (symbolP, symbolP->sy_name_offset);
+
+ /* Any symbol still undefined and is not a dbg symbol is made N_EXT. */
+ if (!S_IS_DEBUG (symbolP) && !S_IS_DEFINED (symbolP))
+ S_SET_EXTERNAL (symbolP);
+
+ /* Adjust the type of a weak symbol. */
+ if (S_GET_WEAK (symbolP))
+ {
+ switch (S_GET_TYPE (symbolP))
+ {
+ case N_UNDF: S_SET_TYPE (symbolP, N_WEAKU); break;
+ case N_ABS: S_SET_TYPE (symbolP, N_WEAKA); break;
+ case N_TEXT: S_SET_TYPE (symbolP, N_WEAKT); break;
+ case N_DATA: S_SET_TYPE (symbolP, N_WEAKD); break;
+ case N_BSS: S_SET_TYPE (symbolP, N_WEAKB); break;
+ default: as_bad (_("%s: bad type for weak symbol"), temp); break;
+ }
+ }
+
+ obj_symbol_to_chars (where, symbolP);
+ S_SET_NAME (symbolP, temp);
+ }
+}
+
+#endif /* ! BFD_ASSEMBLER */
+
+static void
+obj_aout_line (ignore)
+ int ignore;
+{
+ /* Assume delimiter is part of expression.
+ BSD4.2 as fails with delightful bug, so we
+ are not being incompatible here. */
+ new_logical_line ((char *) NULL, (int) (get_absolute_expression ()));
+ demand_empty_rest_of_line ();
+} /* obj_aout_line() */
+
+/* Handle .weak. This is a GNU extension. */
+
+static void
+obj_aout_weak (ignore)
+ int ignore;
+{
+ char *name;
+ int c;
+ symbolS *symbolP;
+
+ do
+ {
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ symbolP = symbol_find_or_make (name);
+ *input_line_pointer = c;
+ SKIP_WHITESPACE ();
+ S_SET_WEAK (symbolP);
+ if (c == ',')
+ {
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '\n')
+ c = '\n';
+ }
+ }
+ while (c == ',');
+ demand_empty_rest_of_line ();
+}
+
+/* Handle .type. On {Net,Open}BSD, this is used to set the n_other field,
+ which is then apparently used when doing dynamic linking. Older
+ versions ogas ignored the .type pseudo-op, so we also ignore it if
+ we can't parse it. */
+
+static void
+obj_aout_type (ignore)
+ int ignore;
+{
+ char *name;
+ int c;
+ symbolS *sym;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ sym = symbol_find (name);
+ *input_line_pointer = c;
+ if (sym != NULL)
+ {
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '@')
+ {
+ ++input_line_pointer;
+ if (strncmp (input_line_pointer, "object", 6) == 0)
+ S_SET_OTHER (sym, 1);
+ else if (strncmp (input_line_pointer, "function", 8) == 0)
+ S_SET_OTHER (sym, 2);
+ }
+ }
+ }
+
+ /* Ignore everything else on the line. */
+ s_ignore (0);
+}
+
+void
+obj_read_begin_hook ()
+{
+}
+
+#ifndef BFD_ASSEMBLER
+
+void
+obj_crawl_symbol_chain (headers)
+ object_headers *headers;
+{
+ symbolS *symbolP;
+ symbolS **symbolPP;
+ int symbol_number = 0;
+
+ tc_crawl_symbol_chain (headers);
+
+ symbolPP = &symbol_rootP; /*->last symbol chain link. */
+ while ((symbolP = *symbolPP) != NULL)
+ {
+ if (symbolP->sy_mri_common)
+ {
+ if (S_IS_EXTERNAL (symbolP))
+ as_bad (_("%s: global symbols not supported in common sections"),
+ S_GET_NAME (symbolP));
+ *symbolPP = symbol_next (symbolP);
+ continue;
+ }
+
+ if (flag_readonly_data_in_text && (S_GET_SEGMENT (symbolP) == SEG_DATA))
+ {
+ S_SET_SEGMENT (symbolP, SEG_TEXT);
+ } /* if pusing data into text */
+
+ resolve_symbol_value (symbolP, 1);
+
+ /* Skip symbols which were equated to undefined or common
+ symbols. */
+ if (symbolP->sy_value.X_op == O_symbol
+ && (! S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)))
+ {
+ *symbolPP = symbol_next (symbolP);
+ continue;
+ }
+
+ /* OK, here is how we decide which symbols go out into the brave
+ new symtab. Symbols that do are:
+
+ * symbols with no name (stabd's?)
+ * symbols with debug info in their N_TYPE
+
+ Symbols that don't are:
+ * symbols that are registers
+ * symbols with \1 as their 3rd character (numeric labels)
+ * "local labels" as defined by S_LOCAL_NAME(name) if the -L
+ switch was passed to gas.
+
+ All other symbols are output. We complain if a deleted
+ symbol was marked external. */
+
+
+ if (!S_IS_REGISTER (symbolP)
+ && (!S_GET_NAME (symbolP)
+ || S_IS_DEBUG (symbolP)
+ || !S_IS_DEFINED (symbolP)
+ || S_IS_EXTERNAL (symbolP)
+ || (S_GET_NAME (symbolP)[0] != '\001'
+ && (flag_keep_locals || !S_LOCAL_NAME (symbolP)))))
+ {
+ symbolP->sy_number = symbol_number++;
+
+ /* The + 1 after strlen account for the \0 at the
+ end of each string */
+ if (!S_IS_STABD (symbolP))
+ {
+ /* Ordinary case. */
+ symbolP->sy_name_offset = string_byte_count;
+ string_byte_count += strlen (S_GET_NAME (symbolP)) + 1;
+ }
+ else /* .Stabd case. */
+ symbolP->sy_name_offset = 0;
+ symbolPP = &(symbol_next (symbolP));
+ }
+ else
+ {
+ if (S_IS_EXTERNAL (symbolP) || !S_IS_DEFINED (symbolP))
+ /* This warning should never get triggered any more.
+ Well, maybe if you're doing twisted things with
+ register names... */
+ {
+ as_bad (_("Local symbol %s never defined."), decode_local_label_name (S_GET_NAME (symbolP)));
+ } /* oops. */
+
+ /* Unhook it from the chain */
+ *symbolPP = symbol_next (symbolP);
+ } /* if this symbol should be in the output */
+ } /* for each symbol */
+
+ H_SET_SYMBOL_TABLE_SIZE (headers, symbol_number);
+}
+
+/*
+ * Find strings by crawling along symbol table chain.
+ */
+
+void
+obj_emit_strings (where)
+ char **where;
+{
+ symbolS *symbolP;
+
+#ifdef CROSS_COMPILE
+ /* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
+ md_number_to_chars (*where, string_byte_count, sizeof (string_byte_count));
+ *where += sizeof (string_byte_count);
+#else /* CROSS_COMPILE */
+ append (where, (char *) &string_byte_count, (unsigned long) sizeof (string_byte_count));
+#endif /* CROSS_COMPILE */
+
+ for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP))
+ {
+ if (S_GET_NAME (symbolP))
+ append (&next_object_file_charP, S_GET_NAME (symbolP),
+ (unsigned long) (strlen (S_GET_NAME (symbolP)) + 1));
+ } /* walk symbol chain */
+}
+
+#ifndef AOUT_VERSION
+#define AOUT_VERSION 0
+#endif
+
+void
+obj_pre_write_hook (headers)
+ object_headers *headers;
+{
+ H_SET_DYNAMIC (headers, 0);
+ H_SET_VERSION (headers, AOUT_VERSION);
+ H_SET_MACHTYPE (headers, AOUT_MACHTYPE);
+ tc_aout_pre_write_hook (headers);
+}
+
+void
+DEFUN_VOID (s_sect)
+{
+ /* Strip out the section name */
+ char *section_name;
+ char *section_name_end;
+ char c;
+
+ unsigned int len;
+ unsigned int exp;
+ char *save;
+
+ section_name = input_line_pointer;
+ c = get_symbol_end ();
+ section_name_end = input_line_pointer;
+
+ len = section_name_end - section_name;
+ input_line_pointer++;
+ save = input_line_pointer;
+
+ SKIP_WHITESPACE ();
+ if (c == ',')
+ {
+ exp = get_absolute_expression ();
+ }
+ else if (*input_line_pointer == ',')
+ {
+ input_line_pointer++;
+ exp = get_absolute_expression ();
+ }
+ else
+ {
+ input_line_pointer = save;
+ exp = 0;
+ }
+ if (exp >= 1000)
+ {
+ as_bad (_("subsegment index too high"));
+ }
+
+ if (strcmp (section_name, ".text") == 0)
+ {
+ subseg_set (SEG_TEXT, (subsegT) exp);
+ }
+
+ if (strcmp (section_name, ".data") == 0)
+ {
+ if (flag_readonly_data_in_text)
+ subseg_set (SEG_TEXT, (subsegT) exp + 1000);
+ else
+ subseg_set (SEG_DATA, (subsegT) exp);
+ }
+
+ *section_name_end = c;
+}
+
+#endif /* ! BFD_ASSEMBLER */
+
+/* end of obj-aout.c */
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