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-rw-r--r--gas/config/obj-bout.c348
1 files changed, 348 insertions, 0 deletions
diff --git a/gas/config/obj-bout.c b/gas/config/obj-bout.c
new file mode 100644
index 0000000..c9b80f5
--- /dev/null
+++ b/gas/config/obj-bout.c
@@ -0,0 +1,348 @@
+/* b.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"
+#include "obstack.h"
+const short /* in: segT out: N_TYPE bits */
+ 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,
+};
+
+static void obj_bout_line PARAMS ((int));
+
+const pseudo_typeS obj_pseudo_table[] =
+{
+ {"line", obj_bout_line, 0}, /* source code line number */
+
+/* coff debugging directives. Currently ignored silently */
+ {"def", s_ignore, 0},
+ {"dim", s_ignore, 0},
+ {"endef", s_ignore, 0},
+ {"ln", s_ignore, 0},
+ {"scl", s_ignore, 0},
+ {"size", s_ignore, 0},
+ {"tag", s_ignore, 0},
+ {"type", s_ignore, 0},
+ {"val", s_ignore, 0},
+
+/* other stuff we don't handle */
+ {"ABORT", s_ignore, 0},
+ {"ident", s_ignore, 0},
+
+ {NULL} /* end sentinel */
+}; /* obj_pseudo_table */
+
+/* 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
+ || fixP->fx_r_type != NO_RELOC)
+ {
+ 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;
+
+ tc_bout_fix_to_chars (*where, fixP, segment_address_in_file);
+ *where += sizeof (struct relocation_info);
+ } /* if there's a symbol */
+ } /* for each fixup */
+
+} /* emit_relocations() */
+
+/* Aout file generation & utilities */
+
+/* Convert a lvalue to machine dependent data */
+void
+obj_header_append (where, headers)
+ char **where;
+ object_headers *headers;
+{
+ /* Always leave in host byte order */
+
+ headers->header.a_talign = section_alignment[SEG_TEXT];
+
+ if (headers->header.a_talign < 2)
+ {
+ headers->header.a_talign = 2;
+ } /* force to at least 2 */
+
+ headers->header.a_dalign = section_alignment[SEG_DATA];
+ headers->header.a_balign = section_alignment[SEG_BSS];
+
+ headers->header.a_tload = 0;
+ headers->header.a_dload = md_section_align (SEG_DATA, H_GET_TEXT_SIZE (headers));
+
+ headers->header.a_relaxable = linkrelax;
+
+#ifdef CROSS_COMPILE
+ md_number_to_chars (*where, headers->header.a_magic, sizeof (headers->header.a_magic));
+ *where += sizeof (headers->header.a_magic);
+ 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);
+ md_number_to_chars (*where, headers->header.a_tload, sizeof (headers->header.a_tload));
+ *where += sizeof (headers->header.a_tload);
+ md_number_to_chars (*where, headers->header.a_dload, sizeof (headers->header.a_dload));
+ *where += sizeof (headers->header.a_dload);
+ md_number_to_chars (*where, headers->header.a_talign, sizeof (headers->header.a_talign));
+ *where += sizeof (headers->header.a_talign);
+ md_number_to_chars (*where, headers->header.a_dalign, sizeof (headers->header.a_dalign));
+ *where += sizeof (headers->header.a_dalign);
+ md_number_to_chars (*where, headers->header.a_balign, sizeof (headers->header.a_balign));
+ *where += sizeof (headers->header.a_balign);
+ md_number_to_chars (*where, headers->header.a_relaxable, sizeof (headers->header.a_relaxable));
+ *where += sizeof (headers->header.a_relaxable);
+#else /* ! CROSS_COMPILE */
+ append (where, (char *) &headers->header, sizeof (headers->header));
+#endif /* ! CROSS_COMPILE */
+} /* a_header_append() */
+
+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));
+} /* obj_symbol_to_chars() */
+
+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. */
+ 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);
+
+ obj_symbol_to_chars (where, symbolP);
+ S_SET_NAME (symbolP, temp);
+ }
+} /* emit_symbols() */
+
+void
+obj_symbol_new_hook (symbolP)
+ symbolS *symbolP;
+{
+ S_SET_OTHER (symbolP, 0);
+ S_SET_DESC (symbolP, 0);
+}
+
+static void
+obj_bout_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_bout_line() */
+
+void
+obj_read_begin_hook ()
+{
+}
+
+void
+obj_crawl_symbol_chain (headers)
+ object_headers *headers;
+{
+ symbolS **symbolPP;
+ symbolS *symbolP;
+ int symbol_number = 0;
+
+ tc_crawl_symbol_chain (headers);
+
+ symbolPP = &symbol_rootP; /*->last symbol chain link. */
+ while ((symbolP = *symbolPP) != NULL)
+ {
+ 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 (1
+ && !S_IS_REGISTER (symbolP)
+ && (!S_GET_NAME (symbolP)
+ || S_IS_DEBUG (symbolP)
+#ifdef TC_I960
+ /* FIXME-SOON this ifdef seems highly dubious to me. xoxorich. */
+ || !S_IS_DEFINED (symbolP)
+ || S_IS_EXTERNAL (symbolP)
+#endif /* TC_I960 */
+ || (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))
+ {
+ as_bad (_("Local symbol %s never defined"), 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 (where, S_GET_NAME (symbolP), (unsigned long) (strlen (S_GET_NAME (symbolP)) + 1));
+ } /* walk symbol chain */
+}
+
+/* end of obj-bout.c */
generated by cgit v1.1 at 2025-01-04 05:30:09 +0000