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-rw-r--r--binutils-2.25/gas/config/obj-aout.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/binutils-2.25/gas/config/obj-aout.c b/binutils-2.25/gas/config/obj-aout.c
new file mode 100644
index 00000000..ce721359
--- /dev/null
+++ b/binutils-2.25/gas/config/obj-aout.c
@@ -0,0 +1,345 @@
+/* a.out object file format
+ Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2007, 2009, 2010, 2012
+ 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 3,
+ 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, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+#define OBJ_HEADER "obj-aout.h"
+
+#include "as.h"
+#undef NO_RELOC
+#include "aout/aout64.h"
+#include "obstack.h"
+
+void
+obj_aout_frob_symbol (symbolS *sym, int *punt ATTRIBUTE_UNUSED)
+{
+ flagword flags;
+ asection *sec;
+ int type;
+
+ flags = symbol_get_bfdsym (sym)->flags;
+ type = aout_symbol (symbol_get_bfdsym (sym))->type;
+ sec = S_GET_SEGMENT (sym);
+
+ /* Only frob simple symbols this way right now. */
+ if (! (type & ~ (N_TYPE | N_EXT)))
+ {
+ if (type == (N_UNDF | N_EXT)
+ && sec == bfd_abs_section_ptr)
+ {
+ sec = bfd_und_section_ptr;
+ S_SET_SEGMENT (sym, sec);
+ }
+
+ 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_ptr
+ || sec == bfd_und_section_ptr))
+ 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. */
+ symbol_get_bfdsym (sym)->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. */
+ S_SET_SEGMENT (sym, bfd_ind_section_ptr);
+ symbol_get_bfdsym (sym)->flags |= BSF_INDIRECT;
+ if (type & N_EXT)
+ {
+ symbol_get_bfdsym (sym)->flags |= BSF_EXPORT;
+ symbol_get_bfdsym (sym)->flags &=~ BSF_LOCAL;
+ }
+ break;
+ case N_WARNING:
+ /* Mark warning symbols. */
+ symbol_get_bfdsym (sym)->flags |= BSF_WARNING;
+ break;
+ }
+ }
+ else
+ symbol_get_bfdsym (sym)->flags |= BSF_DEBUGGING;
+
+ aout_symbol (symbol_get_bfdsym (sym))->type = type;
+
+ /* Double check weak symbols. */
+ if (S_IS_WEAK (sym) && S_IS_COMMON (sym))
+ as_bad (_("Symbol `%s' can not be both weak and common"),
+ S_GET_NAME (sym));
+}
+
+void
+obj_aout_frob_file_before_fix (void)
+{
+ /* 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;
+ bfd_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);
+
+ gas_assert (x);
+}
+
+static void
+obj_aout_line (int ignore ATTRIBUTE_UNUSED)
+{
+ /* 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 ();
+}
+
+/* Handle .weak. This is a GNU extension. */
+
+static void
+obj_aout_weak (int ignore ATTRIBUTE_UNUSED)
+{
+ 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 of gas ignored the .type pseudo-op, so we also ignore it if
+ we can't parse it. */
+
+static void
+obj_aout_type (int ignore ATTRIBUTE_UNUSED)
+{
+ char *name;
+ int c;
+ symbolS *sym;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ sym = symbol_find_or_make (name);
+ *input_line_pointer = c;
+ 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);
+}
+
+/* Support for an AOUT emulation. */
+
+static void
+aout_pop_insert (void)
+{
+ pop_insert (aout_pseudo_table);
+}
+
+static int
+obj_aout_s_get_other (symbolS *sym)
+{
+ return aout_symbol (symbol_get_bfdsym (sym))->other;
+}
+
+static void
+obj_aout_s_set_other (symbolS *sym, int o)
+{
+ aout_symbol (symbol_get_bfdsym (sym))->other = o;
+}
+
+static int
+obj_aout_sec_sym_ok_for_reloc (asection *sec ATTRIBUTE_UNUSED)
+{
+ return obj_sec_sym_ok_for_reloc (sec);
+}
+
+static void
+obj_aout_process_stab (segT seg ATTRIBUTE_UNUSED,
+ int w,
+ const char *s,
+ int t,
+ int o,
+ int d)
+{
+ aout_process_stab (w, s, t, o, d);
+}
+
+static int
+obj_aout_s_get_desc (symbolS *sym)
+{
+ return aout_symbol (symbol_get_bfdsym (sym))->desc;
+}
+
+static void
+obj_aout_s_set_desc (symbolS *sym, int d)
+{
+ aout_symbol (symbol_get_bfdsym (sym))->desc = d;
+}
+
+static int
+obj_aout_s_get_type (symbolS *sym)
+{
+ return aout_symbol (symbol_get_bfdsym (sym))->type;
+}
+
+static void
+obj_aout_s_set_type (symbolS *sym, int t)
+{
+ aout_symbol (symbol_get_bfdsym (sym))->type = t;
+}
+
+static int
+obj_aout_separate_stab_sections (void)
+{
+ return 0;
+}
+
+/* When changed, make sure these table entries match the single-format
+ definitions in obj-aout.h. */
+
+const struct format_ops aout_format_ops =
+{
+ bfd_target_aout_flavour,
+ 1, /* dfl_leading_underscore. */
+ 0, /* emit_section_symbols. */
+ 0, /* begin. */
+ 0, /* app_file. */
+ obj_aout_frob_symbol,
+ 0, /* frob_file. */
+ 0, /* frob_file_before_adjust. */
+ obj_aout_frob_file_before_fix,
+ 0, /* frob_file_after_relocs. */
+ 0, /* s_get_size. */
+ 0, /* s_set_size. */
+ 0, /* s_get_align. */
+ 0, /* s_set_align. */
+ obj_aout_s_get_other,
+ obj_aout_s_set_other,
+ obj_aout_s_get_desc,
+ obj_aout_s_set_desc,
+ obj_aout_s_get_type,
+ obj_aout_s_set_type,
+ 0, /* copy_symbol_attributes. */
+ 0, /* generate_asm_lineno. */
+ obj_aout_process_stab,
+ obj_aout_separate_stab_sections,
+ 0, /* init_stab_section. */
+ obj_aout_sec_sym_ok_for_reloc,
+ aout_pop_insert,
+ 0, /* ecoff_set_ext. */
+ 0, /* read_begin_hook. */
+ 0, /* symbol_new_hook. */
+ 0, /* symbol_clone_hook. */
+ 0 /* adjust_symtab. */
+};
+
+const pseudo_typeS aout_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, NULL, 0}
+};
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