/* ELF object file format
- Copyright (C) 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 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,
+ 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
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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-elf.h"
#include "as.h"
+#include "safe-ctype.h"
#include "subsegs.h"
-#include "aout/stab_gnu.h"
#include "obstack.h"
+#include "struc-symbol.h"
+#include "dwarf2dbg.h"
-static void obj_elf_stab PARAMS ((int what));
-static void obj_elf_xstab PARAMS ((int what));
-static void obj_elf_line PARAMS ((void));
-void obj_elf_desc PARAMS ((void));
-void obj_elf_version PARAMS ((void));
-static void obj_elf_section PARAMS ((int));
-static void obj_elf_size PARAMS ((void));
-static void obj_elf_type PARAMS ((void));
-static void obj_elf_ident PARAMS ((void));
-static void obj_elf_previous PARAMS ((void));
+#ifndef ECOFF_DEBUGGING
+#define ECOFF_DEBUGGING 0
+#else
+#define NEED_ECOFF_DEBUG
+#endif
+
+#ifdef NEED_ECOFF_DEBUG
+#include "ecoff.h"
+#endif
+
+#ifdef TC_ALPHA
+#include "elf/alpha.h"
+#endif
+
+#ifdef TC_MIPS
+#include "elf/mips.h"
+#endif
+
+#ifdef TC_PPC
+#include "elf/ppc.h"
+#endif
+
+#ifdef TC_I370
+#include "elf/i370.h"
+#endif
+
+#ifdef TC_I386
+#include "elf/x86-64.h"
+#endif
+
+#ifdef TC_MEP
+#include "elf/mep.h"
+#endif
-const pseudo_typeS obj_pseudo_table[] =
+static void obj_elf_line (int);
+static void obj_elf_size (int);
+static void obj_elf_type (int);
+static void obj_elf_ident (int);
+static void obj_elf_weak (int);
+static void obj_elf_local (int);
+static void obj_elf_visibility (int);
+static void obj_elf_symver (int);
+static void obj_elf_subsection (int);
+static void obj_elf_popsection (int);
+static void obj_elf_tls_common (int);
+static void obj_elf_lcomm (int);
+static void obj_elf_struct (int);
+
+static const pseudo_typeS elf_pseudo_table[] =
{
+ {"comm", obj_elf_common, 0},
+ {"common", obj_elf_common, 1},
{"ident", obj_elf_ident, 0},
+ {"lcomm", obj_elf_lcomm, 0},
+ {"local", obj_elf_local, 0},
{"previous", obj_elf_previous, 0},
{"section", obj_elf_section, 0},
+ {"section.s", obj_elf_section, 0},
+ {"sect", obj_elf_section, 0},
+ {"sect.s", obj_elf_section, 0},
+ {"pushsection", obj_elf_section, 1},
+ {"popsection", obj_elf_popsection, 0},
{"size", obj_elf_size, 0},
{"type", obj_elf_type, 0},
{"version", obj_elf_version, 0},
+ {"weak", obj_elf_weak, 0},
+
+ /* These define symbol visibility. */
+ {"internal", obj_elf_visibility, STV_INTERNAL},
+ {"hidden", obj_elf_visibility, STV_HIDDEN},
+ {"protected", obj_elf_visibility, STV_PROTECTED},
-/* These are used for stabs-in-elf configurations. */
- {"desc", obj_elf_desc, 0},
+ /* These are used for stabs-in-elf configurations. */
{"line", obj_elf_line, 0},
- {"stabd", obj_elf_stab, 'd'},
- {"stabn", obj_elf_stab, 'n'},
- {"stabs", obj_elf_stab, 's'},
-/* This is used on Solaris 2.x on SPARC, but not supported yet. */
- {"xstabs", obj_elf_xstab, 's'},
- /* These are used for dwarf. */
+ /* This is a GNU extension to handle symbol versions. */
+ {"symver", obj_elf_symver, 0},
+
+ /* A GNU extension to change subsection only. */
+ {"subsection", obj_elf_subsection, 0},
+
+ /* These are GNU extensions to aid in garbage collecting C++ vtables. */
+ {"vtable_inherit", (void (*) (int)) &obj_elf_vtable_inherit, 0},
+ {"vtable_entry", (void (*) (int)) &obj_elf_vtable_entry, 0},
+
+ /* These are used for dwarf. */
{"2byte", cons, 2},
{"4byte", cons, 4},
-
- {NULL} /* end sentinel */
+ {"8byte", cons, 8},
+ /* These are used for dwarf2. */
+ { "file", (void (*) (int)) dwarf2_directive_file, 0 },
+ { "loc", dwarf2_directive_loc, 0 },
+ { "loc_mark_labels", dwarf2_directive_loc_mark_labels, 0 },
+
+ /* We need to trap the section changing calls to handle .previous. */
+ {"data", obj_elf_data, 0},
+ {"offset", obj_elf_struct, 0},
+ {"struct", obj_elf_struct, 0},
+ {"text", obj_elf_text, 0},
+
+ {"tls_common", obj_elf_tls_common, 0},
+
+ /* End sentinel. */
+ {NULL, NULL, 0},
};
-#include "aout/aout64.h"
-
-void
-elf_file_symbol (s)
- char *s;
+static const pseudo_typeS ecoff_debug_pseudo_table[] =
{
- symbolS *sym;
-
- sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0);
- sym->sy_frag = &zero_address_frag;
- sym->bsym->flags |= BSF_FILE;
-
- if (symbol_rootP != sym)
- {
- symbol_remove (sym, &symbol_rootP, &symbol_lastP);
- symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
-#ifdef DEBUG
- verify_symbol_chain (symbol_rootP, symbol_lastP);
+#ifdef NEED_ECOFF_DEBUG
+ /* COFF style debugging information for ECOFF. .ln is not used; .loc
+ is used instead. */
+ { "def", ecoff_directive_def, 0 },
+ { "dim", ecoff_directive_dim, 0 },
+ { "endef", ecoff_directive_endef, 0 },
+ { "file", ecoff_directive_file, 0 },
+ { "scl", ecoff_directive_scl, 0 },
+ { "tag", ecoff_directive_tag, 0 },
+ { "val", ecoff_directive_val, 0 },
+
+ /* COFF debugging requires pseudo-ops .size and .type, but ELF
+ already has meanings for those. We use .esize and .etype
+ instead. These are only generated by gcc anyhow. */
+ { "esize", ecoff_directive_size, 0 },
+ { "etype", ecoff_directive_type, 0 },
+
+ /* ECOFF specific debugging information. */
+ { "begin", ecoff_directive_begin, 0 },
+ { "bend", ecoff_directive_bend, 0 },
+ { "end", ecoff_directive_end, 0 },
+ { "ent", ecoff_directive_ent, 0 },
+ { "fmask", ecoff_directive_fmask, 0 },
+ { "frame", ecoff_directive_frame, 0 },
+ { "loc", ecoff_directive_loc, 0 },
+ { "mask", ecoff_directive_mask, 0 },
+
+ /* Other ECOFF directives. */
+ { "extern", ecoff_directive_extern, 0 },
+
+ /* These are used on Irix. I don't know how to implement them. */
+ { "alias", s_ignore, 0 },
+ { "bgnb", s_ignore, 0 },
+ { "endb", s_ignore, 0 },
+ { "lab", s_ignore, 0 },
+ { "noalias", s_ignore, 0 },
+ { "verstamp", s_ignore, 0 },
+ { "vreg", s_ignore, 0 },
#endif
- }
-}
-
-static segT previous_section;
-static int previous_subsection;
-
-static void
-obj_elf_section (xxx)
- int xxx;
-{
- char *string;
- asection *sec;
- /* Initialize this with inclusive-or of all flags that can be cleared
- by attributes, but not set by them. Also include flags that won't
- get set properly in the assembler, but which the user/compiler
- shouldn't be expected to set. */
- flagword flags = SEC_READONLY | SEC_ALLOC | SEC_RELOC;
- /* Initialize this with the default flags to be used if none are
- specified. */
- flagword default_flags = 0;
-
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '"')
- string = demand_copy_C_string (&xxx);
- else
- {
- char *p = input_line_pointer;
- char c;
- while (0 == strchr ("\n\t,; ", *p))
- p++;
- c = *p;
- *p = 0;
- string = xmalloc (p - input_line_pointer + 1);
- strcpy (string, input_line_pointer);
- *p = c;
- input_line_pointer = p;
- }
- if (!strcmp (string, ".rodata"))
- default_flags = SEC_ALLOC | SEC_READONLY | SEC_RELOC;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- flags = default_flags;
- while (*input_line_pointer == ',')
- {
- flagword bit;
- int len, inv;
- char *p, oldp;
+ {NULL, NULL, 0} /* end sentinel */
+};
- input_line_pointer++;
- if (*input_line_pointer != '#' && *input_line_pointer != '@')
- {
- as_bad ("unrecognized syntax in .section command");
- ignore_rest_of_line ();
- break;
- }
- input_line_pointer++;
+#undef NO_RELOC
+#include "aout/aout64.h"
-#define CHECK(X,BIT,NEG) \
- if (!strncmp(X,input_line_pointer,len = sizeof(X) - 1)) { \
- bit = BIT; inv = NEG; goto match; }
+/* This is called when the assembler starts. */
- CHECK ("write", SEC_READONLY, 1);
- CHECK ("alloc", SEC_ALLOC, 0);
- CHECK ("execinstr", SEC_CODE, 1);
-#undef CHECK
+asection *elf_com_section_ptr;
- p = input_line_pointer;
- while (!is_end_of_line[*p] && *p != 0 && *p != ',')
- p++;
- *p = 0;
- oldp = *p;
- as_bad ("unrecognized section attribute `%s' ignored",
- input_line_pointer);
- *p = oldp;
- continue;
-
- match:
- if (inv)
- flags &= ~bit;
- else
- flags |= bit;
- input_line_pointer += len;
- }
- demand_empty_rest_of_line ();
+void
+elf_begin (void)
+{
+ asection *s;
+
+ /* Add symbols for the known sections to the symbol table. */
+ s = bfd_get_section_by_name (stdoutput, TEXT_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ s = bfd_get_section_by_name (stdoutput, DATA_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ s = bfd_get_section_by_name (stdoutput, BSS_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ elf_com_section_ptr = bfd_com_section_ptr;
+}
- /* If the C string wasn't valid, `string' could be null. */
- if (!string)
- return;
+void
+elf_pop_insert (void)
+{
+ pop_insert (elf_pseudo_table);
+ if (ECOFF_DEBUGGING)
+ pop_insert (ecoff_debug_pseudo_table);
+}
- sec = bfd_get_section_by_name (stdoutput, string);
- if (sec == 0)
- {
- sec = subseg_new (string, 0);
- bfd_set_section_flags (stdoutput, sec, flags);
- sec->output_section = sec;
- }
- previous_section = now_seg;
- previous_subsection = now_subseg;
- subseg_set (sec, 0);
+static bfd_vma
+elf_s_get_size (symbolS *sym)
+{
+ return S_GET_SIZE (sym);
}
static void
-obj_elf_previous ()
+elf_s_set_size (symbolS *sym, bfd_vma sz)
{
- if (previous_section == 0)
- {
- as_bad (".previous without corresponding .section; ignored");
- return;
- }
- subseg_set (previous_section, previous_subsection);
- previous_section = 0;
+ S_SET_SIZE (sym, sz);
}
-int
-obj_elf_write_symbol_p (sym)
- symbolS *sym;
+static bfd_vma
+elf_s_get_align (symbolS *sym)
{
- /* If this is a local symbol, are there any relocations for which
- need this symbol? */
-
- /* To find this out, we examine all relocations in all bfd sections
- that have relocations. If there is one that references this
- symbol, we need to keep this symbol. In this case, we return a
- true status. In all other cases, we return a false status. */
-
- if (S_IS_LOCAL (sym))
- {
- asymbol *bsym = sym->bsym;
- bfd *abfd = bsym->the_bfd;
- asection *bsec;
-
- for (bsec = abfd->sections; bsec; bsec = bsec->next)
- {
- struct reloc_cache_entry **rlocs = bsec->orelocation;
- int rcnt = bsec->reloc_count;
-
- if (rlocs)
- {
- int i;
-
- for (i = 0; i < rcnt; i++)
- if (rlocs[i]->sym_ptr_ptr
- && rlocs[i]->sym_ptr_ptr[0] == bsym)
- return 1;
- }
- else
- {
- /* No relocations for this section. Check the seg_info
- structure to see if there are any fixups for this
- section. */
- segment_info_type *seginfo = seg_info (bsec);
- fixS *fixp;
-
- for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
- if ((fixp->fx_addsy && fixp->fx_addsy->bsym == bsym)
- || (fixp->fx_subsy && fixp->fx_subsy->bsym == bsym))
- return 1;
- }
- }
- }
- return 0;
+ return S_GET_ALIGN (sym);
}
-int
-obj_elf_write_symbol (sym)
- symbolS *sym;
+static void
+elf_s_set_align (symbolS *sym, bfd_vma align)
{
- return /* obj_elf_write_symbol_p (sym) || */ !S_IS_LOCAL (sym);
+ S_SET_ALIGN (sym, align);
}
int
-obj_elf_frob_symbol (sym, punt)
- symbolS *sym;
- int *punt;
+elf_s_get_other (symbolS *sym)
{
- return obj_elf_write_symbol_p (sym);
+ return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other;
}
static void
-obj_elf_line ()
+elf_s_set_other (symbolS *sym, int other)
{
- /* 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 ();
+ S_SET_OTHER (sym, other);
}
-/*
- * stab()
- *
- * Handle .stabX directives, which used to be open-coded.
- * So much creeping featurism overloaded the semantics that we decided
- * to put all .stabX thinking in one place. Here.
- *
- * We try to make any .stabX directive legal. Other people's AS will often
- * do assembly-time consistency checks: eg assigning meaning to n_type bits
- * and "protecting" you from setting them to certain values. (They also zero
- * certain bits before emitting symbols. Tut tut.)
- *
- * If an expression is not absolute we either gripe or use the relocation
- * information. Other people's assemblers silently forget information they
- * don't need and invent information they need that you didn't supply.
- *
- * .stabX directives always make a symbol table entry. It may be junk if
- * the rest of your .stabX directive is malformed.
- */
-
-/*
- * elf_stab_symbol_string()
- *
- * Build a string dictionary entry for a .stabX symbol.
- * The symbol is added to the .stabstr section.
- *
- */
-
-static unsigned int
-elf_stab_symbol_string (string, secname)
- char *string, *secname;
-{
- asection *save_seg;
- asection *seg;
- subsegT save_subseg;
- unsigned int length;
- unsigned int old_gdb_string_index;
- char *clengthP;
- int i;
- char c;
- /* @@FIXME -- there should be no static data here!
- This also has the effect of making all stab string tables large enough
- to contain all the contents written to any of them. This only matters
- with the Solaris native compiler for the moment, but it should be fixed
- anyways. */
- static unsigned int gdb_string_index = 0;
-
- old_gdb_string_index = 0;
- length = strlen (string);
- clengthP = (char *) &length;
- if (length > 0)
- { /* Ordinary case. */
- save_seg = now_seg;
- save_subseg = now_subseg;
-
- /* Create the stab sections, if they are not already created. */
- {
- char *newsecname = xmalloc (strlen (secname) + 4);
- strcpy (newsecname, secname);
- strcat (newsecname, "str");
- seg = bfd_get_section_by_name (stdoutput, newsecname);
- if (seg == 0)
- {
- seg = bfd_make_section_old_way (stdoutput, newsecname);
- bfd_set_section_flags (stdoutput, seg, SEC_READONLY | SEC_ALLOC);
- }
-/* free (newsecname);*/
- }
- subseg_new ((char *) seg->name, save_subseg);
- old_gdb_string_index = gdb_string_index;
- i = 0;
- while ((c = *string++))
- {
- i++;
- gdb_string_index++;
- FRAG_APPEND_1_CHAR (c);
- }
- {
- FRAG_APPEND_1_CHAR ((char) 0);
- i++;
- gdb_string_index++;
- }
- while (i % 4 != 0)
- {
- FRAG_APPEND_1_CHAR ((char) 0);
- i++;
- gdb_string_index++;
- }
- subseg_new ((char *) save_seg->name, save_subseg);
- }
-
- return old_gdb_string_index;
+static int
+elf_sec_sym_ok_for_reloc (asection *sec)
+{
+ return obj_sec_sym_ok_for_reloc (sec);
}
-static void
-DEFUN (elf_stab_symbol, (symbolP, stab_type),
- symbolS *symbolP AND
- int stab_type)
-{
- char *toP;
-
- toP = frag_more (8);
- /* the string index portion of the stab */
- md_number_to_chars (toP, (valueT) symbolP->sy_name_offset, 4);
- md_number_to_chars (toP + 4, (valueT) S_GET_TYPE (symbolP), 1);
- md_number_to_chars (toP + 5, (valueT) S_GET_OTHER (symbolP), 1);
- md_number_to_chars (toP + 6, (valueT) S_GET_DESC (symbolP), 2);
- /* The n_value field doesn't get written here, it gets done below. It
- may be an expression needing relocating. */
-}
-
-static void
-obj_elf_stab_generic (what, secname)
- int what;
- char *secname;
-{
- extern int listing;
-
- symbolS *symbolP = 0;
- char *string;
- int saved_type = 0;
- int length;
- int goof = 0;
- long longint;
- asection *saved_seg = now_seg;
- asection *seg;
- subsegT subseg = now_subseg;
-
-#if 1
- /* This function doesn't work yet.
-
- Actually, this function is okay, but some finalizations are needed
- before writing the object file; that's not done yet, and the Solaris
- linker chokes without it.
-
- In any case, this should effectively disable it for now. */
- if (what == 's')
- demand_copy_C_string (&length);
- s_ignore (69);
- return;
-#endif
-
- seg = bfd_get_section_by_name (stdoutput, secname);
- if (seg == 0)
+void
+elf_file_symbol (const char *s, int appfile)
+{
+ if (!appfile
+ || symbol_rootP == NULL
+ || symbol_rootP->bsym == NULL
+ || (symbol_rootP->bsym->flags & BSF_FILE) == 0)
{
- seg = subseg_new (secname, 0);
- bfd_set_section_flags (stdoutput, seg,
- SEC_READONLY | SEC_ALLOC | SEC_RELOC);
- subseg_set (saved_seg, subseg);
- }
+ symbolS *sym;
- /*
- * Enter with input_line_pointer pointing past .stabX and any following
- * whitespace.
- */
- if (what == 's')
- {
- string = demand_copy_C_string (&length);
- SKIP_WHITESPACE ();
- if (*input_line_pointer == ',')
- input_line_pointer++;
- else
+ sym = symbol_new (s, absolute_section, 0, NULL);
+ symbol_set_frag (sym, &zero_address_frag);
+ symbol_get_bfdsym (sym)->flags |= BSF_FILE;
+
+ if (symbol_rootP != sym)
{
- as_bad ("I need a comma after symbol's name");
- goof = 1;
+ symbol_remove (sym, &symbol_rootP, &symbol_lastP);
+ symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
+#ifdef DEBUG
+ verify_symbol_chain (symbol_rootP, symbol_lastP);
+#endif
}
}
- else
- string = "";
- /*
- * Input_line_pointer->after ','. String->symbol name.
- */
- if (!goof)
- {
- symbolP = symbol_new (string, &bfd_und_section, (valueT) 0, (struct frag *) 0);
-
- /* enter the string in the .stab string table (section .stabstr) */
- symbolP->sy_name_offset = elf_stab_symbol_string (string, secname);
+#ifdef NEED_ECOFF_DEBUG
+ ecoff_new_file (s, appfile);
+#endif
+}
- switch (what)
- {
- case 'd':
- S_SET_NAME (symbolP, NULL); /* .stabd feature. */
- S_SET_VALUE (symbolP,
- (valueT) ((char*) obstack_next_free (&frags) - frag_now->fr_literal));
- S_SET_SEGMENT (symbolP, now_seg);
- symbolP->sy_frag = frag_now;
- break;
+/* Called from read.c:s_comm after we've parsed .comm symbol, size.
+ Parse a possible alignment value. */
- case 'n':
- symbolP->sy_frag = &zero_address_frag;
- break;
+symbolS *
+elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size)
+{
+ addressT align = 0;
+ int is_local = symbol_get_obj (symbolP)->local;
- case 's':
- symbolP->sy_frag = &zero_address_frag;
- break;
+ if (*input_line_pointer == ',')
+ {
+ char *save = input_line_pointer;
- default:
- BAD_CASE (what);
- break;
- }
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
- if (get_absolute_expression_and_terminator (&longint) == ',')
+ if (*input_line_pointer == '"')
{
- saved_type = longint;
- S_SET_TYPE (symbolP, saved_type);
+ /* For sparc. Accept .common symbol, length, "bss" */
+ input_line_pointer++;
+ /* Some use the dot, some don't. */
+ if (*input_line_pointer == '.')
+ input_line_pointer++;
+ /* Some say data, some say bss. */
+ if (strncmp (input_line_pointer, "bss\"", 4) == 0)
+ input_line_pointer += 4;
+ else if (strncmp (input_line_pointer, "data\"", 5) == 0)
+ input_line_pointer += 5;
+ else
+ {
+ char *p = input_line_pointer;
+ char c;
+
+ while (*--p != '"')
+ ;
+ while (!is_end_of_line[(unsigned char) *input_line_pointer])
+ if (*input_line_pointer++ == '"')
+ break;
+ c = *input_line_pointer;
+ *input_line_pointer = '\0';
+ as_bad (_("bad .common segment %s"), p);
+ *input_line_pointer = c;
+ ignore_rest_of_line ();
+ return NULL;
+ }
+ /* ??? Don't ask me why these are always global. */
+ is_local = 0;
}
else
{
- as_bad ("I want a comma after the n_type expression");
- goof = 1;
- input_line_pointer--; /* Backup over a non-',' char. */
+ input_line_pointer = save;
+ align = parse_align (is_local);
+ if (align == (addressT) -1)
+ return NULL;
}
}
- if (!goof)
+ if (is_local)
{
- if (get_absolute_expression_and_terminator (&longint) == ',')
- S_SET_OTHER (symbolP, longint);
- else
- {
- as_bad ("I want a comma after the n_other expression");
- goof = 1;
- input_line_pointer--; /* Backup over a non-',' char. */
- }
+ bss_alloc (symbolP, size, align);
+ S_CLEAR_EXTERNAL (symbolP);
}
-
- if (!goof)
+ else
{
- S_SET_DESC (symbolP, get_absolute_expression ());
- if (what == 's' || what == 'n')
- {
- if (*input_line_pointer != ',')
- {
- as_bad ("I want a comma after the n_desc expression");
- goof = 1;
- }
- else
- {
- input_line_pointer++;
- }
- }
+ S_SET_VALUE (symbolP, size);
+ S_SET_ALIGN (symbolP, align);
+ S_SET_EXTERNAL (symbolP);
+ S_SET_SEGMENT (symbolP, elf_com_section_ptr);
}
- if (!goof)
- {
- subseg_new ((char *) seg->name, subseg);
-
- /* Emit the stab symbol. */
- elf_stab_symbol (symbolP, what);
-
- if (what == 's' || what == 'n')
- {
- cons (4);
- input_line_pointer--;
- }
- else
- {
- char *p = frag_more (4);
- md_number_to_chars (p, 0, 0);
- }
- subseg_new ((char *) saved_seg->name, subseg);
-
- if ((what == 's' || what == 'n')
- && symbolP->sy_value.X_op == O_constant)
- {
- /* symbol is not needed in the regular symbol table */
- symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
- }
-
- }
+ symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
-#ifndef NO_LISTING
- if (listing && !goof)
- switch (S_GET_TYPE (symbolP))
- {
- case N_SLINE:
- listing_source_line (S_GET_DESC (symbolP));
- break;
- case N_SO:
- case N_SOL:
- listing_source_file (string);
- break;
- }
-#endif
+ return symbolP;
+}
- if (goof)
- ignore_rest_of_line ();
+void
+obj_elf_common (int is_common)
+{
+ if (flag_mri && is_common)
+ s_mri_common (0);
else
- demand_empty_rest_of_line ();
+ s_comm_internal (0, elf_common_parse);
}
static void
-obj_elf_stab (what)
- int what;
+obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED)
{
- obj_elf_stab_generic (what, ".stab");
+ symbolS *symbolP = s_comm_internal (0, elf_common_parse);
+
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL;
}
static void
-obj_elf_xstab (what)
- int what;
+obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED)
{
- int length;
- char *secname;
+ symbolS *symbolP = s_comm_internal (0, s_lcomm_internal);
- secname = demand_copy_C_string (&length);
- SKIP_WHITESPACE ();
- if (*input_line_pointer == ',')
- input_line_pointer++;
- else
- {
- as_bad ("comma missing in .xstabs");
- ignore_rest_of_line ();
- return;
- }
- obj_elf_stab_generic (what, secname);
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
}
-void
-obj_elf_desc ()
+static void
+obj_elf_local (int ignore ATTRIBUTE_UNUSED)
{
char *name;
- char c;
- char *p;
+ int c;
symbolS *symbolP;
- int temp;
- /* Frob invented at RMS' request. Set the n_desc of a symbol. */
- name = input_line_pointer;
- c = get_symbol_end ();
- p = input_line_pointer;
- *p = c;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- *p = 0;
- as_bad ("Expected comma after name \"%s\"", name);
- *p = c;
- ignore_rest_of_line ();
- }
- else
+ do
{
- input_line_pointer++;
- temp = get_absolute_expression ();
- *p = 0;
+ name = input_line_pointer;
+ c = get_symbol_end ();
symbolP = symbol_find_or_make (name);
- *p = c;
- S_SET_DESC (symbolP, temp);
+ *input_line_pointer = c;
+ SKIP_WHITESPACE ();
+ S_CLEAR_EXTERNAL (symbolP);
+ symbol_get_obj (symbolP)->local = 1;
+ if (c == ',')
+ {
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '\n')
+ c = '\n';
+ }
}
+ while (c == ',');
demand_empty_rest_of_line ();
-} /* obj_elf_desc() */
-
-void
-obj_read_begin_hook ()
-{
}
-void
-obj_symbol_new_hook (symbolP)
- symbolS *symbolP;
+static void
+obj_elf_weak (int ignore ATTRIBUTE_UNUSED)
{
-#if 0 /* BFD already takes care of this */
- elf32_symbol_type *esym = (elf32_symbol_type *) symbolP;
-
- /* There is an Elf_Internal_Sym and an Elf_External_Sym. For now,
- just zero them out. */
+ char *name;
+ int c;
+ symbolS *symbolP;
- bzero ((char *) &esym->internal_elf_sym, sizeof (esym->internal_elf_sym));
- bzero ((char *) &esym->native_elf_sym, sizeof (esym->native_elf_sym));
- bzero ((char *) &esym->tc_data, sizeof (esym->tc_data));
-#endif
+ 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);
+ symbol_get_obj (symbolP)->local = 1;
+ if (c == ',')
+ {
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '\n')
+ c = '\n';
+ }
+ }
+ while (c == ',');
+ demand_empty_rest_of_line ();
}
-void
-obj_elf_version ()
+static void
+obj_elf_visibility (int visibility)
{
char *name;
- unsigned int c;
- char ch;
- char *p;
- asection *seg = now_seg;
- subsegT subseg = now_subseg;
- Elf_Internal_Note i_note;
- Elf_External_Note e_note;
- asection *note_secp = (asection *) NULL;
- int i, len;
+ int c;
+ symbolS *symbolP;
+ asymbol *bfdsym;
+ elf_symbol_type *elfsym;
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '\"')
+ do
{
- ++input_line_pointer; /* -> 1st char of string. */
name = input_line_pointer;
-
- while (is_a_char (c = next_char_of_string ()))
- ;
- c = *input_line_pointer;
- *input_line_pointer = '\0';
- *(input_line_pointer - 1) = '\0';
+ c = get_symbol_end ();
+ symbolP = symbol_find_or_make (name);
*input_line_pointer = c;
- /* create the .note section if this is the first version string */
-
- note_secp = bfd_get_section_by_name (stdoutput, ".note");
- if (note_secp == (asection *) NULL)
- {
- note_secp = bfd_make_section_old_way (stdoutput, ".note");
- bfd_set_section_flags (stdoutput,
- note_secp,
- SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS);
- }
+ SKIP_WHITESPACE ();
- /* process the version string */
+ bfdsym = symbol_get_bfdsym (symbolP);
+ elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym);
- subseg_new ((char *) note_secp->name, 0);
- len = strlen (name);
+ assert (elfsym);
- i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */
- i_note.descsz = 0; /* no description */
- i_note.type = NT_VERSION;
- p = frag_more (sizeof (e_note.namesz));
- md_number_to_chars (p, (valueT) i_note.namesz, 4);
- p = frag_more (sizeof (e_note.descsz));
- md_number_to_chars (p, (valueT) i_note.descsz, 4);
- p = frag_more (sizeof (e_note.type));
- md_number_to_chars (p, (valueT) i_note.type, 4);
+ elfsym->internal_elf_sym.st_other &= ~3;
+ elfsym->internal_elf_sym.st_other |= visibility;
- for (i = 0; i < len; i++)
+ if (c == ',')
{
- ch = *(name + i);
- {
- FRAG_APPEND_1_CHAR (ch);
- }
- }
- frag_align (2, 0);
+ input_line_pointer ++;
- subseg_new ((char *) seg->name, subseg);
- }
- else
- {
- as_bad ("Expected \"-ed string");
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer == '\n')
+ c = '\n';
+ }
}
+ while (c == ',');
+
+ demand_empty_rest_of_line ();
+}
+
+static segT previous_section;
+static int previous_subsection;
+
+struct section_stack
+{
+ struct section_stack *next;
+ segT seg, prev_seg;
+ int subseg, prev_subseg;
+};
+
+static struct section_stack *section_stack;
+
+static bfd_boolean
+get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
+{
+ const char *gname = inf;
+ const char *group_name = elf_group_name (sec);
+
+ return (group_name == gname
+ || (group_name != NULL
+ && gname != NULL
+ && strcmp (group_name, gname) == 0));
+}
+
+/* Handle the .section pseudo-op. This code supports two different
+ syntaxes.
+
+ The first is found on Solaris, and looks like
+ .section ".sec1",#alloc,#execinstr,#write
+ Here the names after '#' are the SHF_* flags to turn on for the
+ section. I'm not sure how it determines the SHT_* type (BFD
+ doesn't really give us control over the type, anyhow).
+
+ The second format is found on UnixWare, and probably most SVR4
+ machines, and looks like
+ .section .sec1,"a",@progbits
+ The quoted string may contain any combination of a, w, x, and
+ represents the SHF_* flags to turn on for the section. The string
+ beginning with '@' can be progbits or nobits. There should be
+ other possibilities, but I don't know what they are. In any case,
+ BFD doesn't really let us set the section type. */
+
+void
+obj_elf_change_section (const char *name,
+ int type,
+ int attr,
+ int entsize,
+ const char *group_name,
+ int linkonce,
+ int push)
+{
+ asection *old_sec;
+ segT sec;
+ flagword flags;
+ const struct elf_backend_data *bed;
+ const struct bfd_elf_special_section *ssect;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ /* Switch to the section, creating it if necessary. */
+ if (push)
+ {
+ struct section_stack *elt;
+ elt = xmalloc (sizeof (struct section_stack));
+ elt->next = section_stack;
+ elt->seg = now_seg;
+ elt->prev_seg = previous_section;
+ elt->subseg = now_subseg;
+ elt->prev_subseg = previous_subsection;
+ section_stack = elt;
+ }
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+
+ old_sec = bfd_get_section_by_name_if (stdoutput, name, get_section,
+ (void *) group_name);
+ if (old_sec)
+ {
+ sec = old_sec;
+ subseg_set (sec, 0);
+ }
+ else
+ sec = subseg_force_new (name, 0);
+
+ bed = get_elf_backend_data (stdoutput);
+ ssect = (*bed->get_sec_type_attr) (stdoutput, sec);
+
+ if (ssect != NULL)
+ {
+ bfd_boolean override = FALSE;
+
+ if (type == SHT_NULL)
+ type = ssect->type;
+ else if (type != ssect->type)
+ {
+ if (old_sec == NULL
+ /* FIXME: gcc, as of 2002-10-22, will emit
+
+ .section .init_array,"aw",@progbits
+
+ for __attribute__ ((section (".init_array"))).
+ "@progbits" is incorrect. Also for x86-64 large bss
+ sections, gcc, as of 2005-07-06, will emit
+
+ .section .lbss,"aw",@progbits
+
+ "@progbits" is incorrect. */
+#ifdef TC_I386
+ && (bed->s->arch_size != 64
+ || !(ssect->attr & SHF_X86_64_LARGE))
+#endif
+ && ssect->type != SHT_INIT_ARRAY
+ && ssect->type != SHT_FINI_ARRAY
+ && ssect->type != SHT_PREINIT_ARRAY)
+ {
+ /* We allow to specify any type for a .note section. */
+ if (ssect->type != SHT_NOTE)
+ as_warn (_("setting incorrect section type for %s"),
+ name);
+ }
+ else
+ {
+ as_warn (_("ignoring incorrect section type for %s"),
+ name);
+ type = ssect->type;
+ }
+ }
+
+ if (old_sec == NULL && (attr & ~ssect->attr) != 0)
+ {
+ /* As a GNU extension, we permit a .note section to be
+ allocatable. If the linker sees an allocatable .note
+ section, it will create a PT_NOTE segment in the output
+ file. We also allow "x" for .note.GNU-stack. */
+ if (ssect->type == SHT_NOTE
+ && (attr == SHF_ALLOC || attr == SHF_EXECINSTR))
+ ;
+ /* Allow different SHF_MERGE and SHF_STRINGS if we have
+ something like .rodata.str. */
+ else if (ssect->suffix_length == -2
+ && name[ssect->prefix_length] == '.'
+ && (attr
+ & ~ssect->attr
+ & ~SHF_MERGE
+ & ~SHF_STRINGS) == 0)
+ ;
+ /* .interp, .strtab and .symtab can have SHF_ALLOC. */
+ else if (attr == SHF_ALLOC
+ && (strcmp (name, ".interp") == 0
+ || strcmp (name, ".strtab") == 0
+ || strcmp (name, ".symtab") == 0))
+ override = TRUE;
+ /* .note.GNU-stack can have SHF_EXECINSTR. */
+ else if (attr == SHF_EXECINSTR
+ && strcmp (name, ".note.GNU-stack") == 0)
+ override = TRUE;
+#ifdef TC_ALPHA
+ /* A section on Alpha may have SHF_ALPHA_GPREL. */
+ else if ((attr & ~ssect->attr) == SHF_ALPHA_GPREL)
+ override = TRUE;
+#endif
+ else
+ {
+ if (group_name == NULL)
+ as_warn (_("setting incorrect section attributes for %s"),
+ name);
+ override = TRUE;
+ }
+ }
+ if (!override && old_sec == NULL)
+ attr |= ssect->attr;
+ }
+
+ /* Convert ELF type and flags to BFD flags. */
+ flags = (SEC_RELOC
+ | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
+ | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
+ | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
+ | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)
+ | ((attr & SHF_MERGE) ? SEC_MERGE : 0)
+ | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)
+ | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0));
+#ifdef md_elf_section_flags
+ flags = md_elf_section_flags (flags, attr, type);
+#endif
+
+ if (linkonce)
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+
+ if (old_sec == NULL)
+ {
+ symbolS *secsym;
+
+ elf_section_type (sec) = type;
+ elf_section_flags (sec) = attr;
+
+ /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
+ if (type == SHT_NOBITS)
+ seg_info (sec)->bss = 1;
+
+ bfd_set_section_flags (stdoutput, sec, flags);
+ if (flags & SEC_MERGE)
+ sec->entsize = entsize;
+ elf_group_name (sec) = group_name;
+
+ /* Add a symbol for this section to the symbol table. */
+ secsym = symbol_find (name);
+ if (secsym != NULL)
+ symbol_set_bfdsym (secsym, sec->symbol);
+ else
+ symbol_table_insert (section_symbol (sec));
+ }
+ else
+ {
+ if (type != SHT_NULL
+ && (unsigned) type != elf_section_type (old_sec))
+ as_warn (_("ignoring changed section type for %s"), name);
+
+ if (attr != 0)
+ {
+ /* If section attributes are specified the second time we see a
+ particular section, then check that they are the same as we
+ saw the first time. */
+ if (((old_sec->flags ^ flags)
+ & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
+ | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS
+ | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
+ | SEC_THREAD_LOCAL)))
+ as_warn (_("ignoring changed section attributes for %s"), name);
+ if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize)
+ as_warn (_("ignoring changed section entity size for %s"), name);
+ }
+ }
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+static int
+obj_elf_parse_section_letters (char *str, size_t len)
+{
+ int attr = 0;
+
+ while (len > 0)
+ {
+ switch (*str)
+ {
+ case 'a':
+ attr |= SHF_ALLOC;
+ break;
+ case 'w':
+ attr |= SHF_WRITE;
+ break;
+ case 'x':
+ attr |= SHF_EXECINSTR;
+ break;
+ case 'M':
+ attr |= SHF_MERGE;
+ break;
+ case 'S':
+ attr |= SHF_STRINGS;
+ break;
+ case 'G':
+ attr |= SHF_GROUP;
+ break;
+ case 'T':
+ attr |= SHF_TLS;
+ break;
+ /* Compatibility. */
+ case 'm':
+ if (*(str - 1) == 'a')
+ {
+ attr |= SHF_MERGE;
+ if (len > 1 && str[1] == 's')
+ {
+ attr |= SHF_STRINGS;
+ str++, len--;
+ }
+ break;
+ }
+ default:
+ {
+ char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S,G,T");
+#ifdef md_elf_section_letter
+ int md_attr = md_elf_section_letter (*str, &bad_msg);
+ if (md_attr >= 0)
+ attr |= md_attr;
+ else
+#endif
+ as_fatal ("%s", bad_msg);
+ }
+ break;
+ }
+ str++, len--;
+ }
+
+ return attr;
+}
+
+static int
+obj_elf_section_word (char *str, size_t len)
+{
+ if (len == 5 && strncmp (str, "write", 5) == 0)
+ return SHF_WRITE;
+ if (len == 5 && strncmp (str, "alloc", 5) == 0)
+ return SHF_ALLOC;
+ if (len == 9 && strncmp (str, "execinstr", 9) == 0)
+ return SHF_EXECINSTR;
+ if (len == 3 && strncmp (str, "tls", 3) == 0)
+ return SHF_TLS;
+
+#ifdef md_elf_section_word
+ {
+ int md_attr = md_elf_section_word (str, len);
+ if (md_attr >= 0)
+ return md_attr;
+ }
+#endif
+
+ as_warn (_("unrecognized section attribute"));
+ return 0;
+}
+
+static int
+obj_elf_section_type (char *str, size_t len)
+{
+ if (len == 8 && strncmp (str, "progbits", 8) == 0)
+ return SHT_PROGBITS;
+ if (len == 6 && strncmp (str, "nobits", 6) == 0)
+ return SHT_NOBITS;
+ if (len == 4 && strncmp (str, "note", 4) == 0)
+ return SHT_NOTE;
+ if (len == 10 && strncmp (str, "init_array", 10) == 0)
+ return SHT_INIT_ARRAY;
+ if (len == 10 && strncmp (str, "fini_array", 10) == 0)
+ return SHT_FINI_ARRAY;
+ if (len == 13 && strncmp (str, "preinit_array", 13) == 0)
+ return SHT_PREINIT_ARRAY;
+
+#ifdef md_elf_section_type
+ {
+ int md_type = md_elf_section_type (str, len);
+ if (md_type >= 0)
+ return md_type;
+ }
+#endif
+
+ as_warn (_("unrecognized section type"));
+ return 0;
+}
+
+/* Get name of section. */
+static char *
+obj_elf_section_name (void)
+{
+ char *name;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '"')
+ {
+ int dummy;
+
+ name = demand_copy_C_string (&dummy);
+ if (name == NULL)
+ {
+ ignore_rest_of_line ();
+ return NULL;
+ }
+ }
+ else
+ {
+ char *end = input_line_pointer;
+
+ while (0 == strchr ("\n\t,; ", *end))
+ end++;
+ if (end == input_line_pointer)
+ {
+ as_bad (_("missing name"));
+ ignore_rest_of_line ();
+ return NULL;
+ }
+
+ name = xmalloc (end - input_line_pointer + 1);
+ memcpy (name, input_line_pointer, end - input_line_pointer);
+ name[end - input_line_pointer] = '\0';
+#ifdef tc_canonicalize_section_name
+ name = tc_canonicalize_section_name (name);
+#endif
+ input_line_pointer = end;
+ }
+ SKIP_WHITESPACE ();
+ return name;
+}
+
+void
+obj_elf_section (int push)
+{
+ char *name, *group_name, *beg;
+ int type, attr, dummy;
+ int entsize;
+ int linkonce;
+
+#ifndef TC_I370
+ if (flag_mri)
+ {
+ char mri_type;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+
+ s_mri_sect (&mri_type);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+
+ return;
+ }
+#endif /* ! defined (TC_I370) */
+
+ name = obj_elf_section_name ();
+ if (name == NULL)
+ return;
+ type = SHT_NULL;
+ attr = 0;
+ group_name = NULL;
+ entsize = 0;
+ linkonce = 0;
+
+ if (*input_line_pointer == ',')
+ {
+ /* Skip the comma. */
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer == '"')
+ {
+ beg = demand_copy_C_string (&dummy);
+ if (beg == NULL)
+ {
+ ignore_rest_of_line ();
+ return;
+ }
+ attr |= obj_elf_parse_section_letters (beg, strlen (beg));
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == ',')
+ {
+ char c;
+ char *save = input_line_pointer;
+
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ c = *input_line_pointer;
+ if (c == '"')
+ {
+ beg = demand_copy_C_string (&dummy);
+ if (beg == NULL)
+ {
+ ignore_rest_of_line ();
+ return;
+ }
+ type = obj_elf_section_type (beg, strlen (beg));
+ }
+ else if (c == '@' || c == '%')
+ {
+ beg = ++input_line_pointer;
+ c = get_symbol_end ();
+ *input_line_pointer = c;
+ type = obj_elf_section_type (beg, input_line_pointer - beg);
+ }
+ else
+ input_line_pointer = save;
+ }
+
+ SKIP_WHITESPACE ();
+ if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ entsize = get_absolute_expression ();
+ SKIP_WHITESPACE ();
+ if (entsize < 0)
+ {
+ as_warn (_("invalid merge entity size"));
+ attr &= ~SHF_MERGE;
+ entsize = 0;
+ }
+ }
+ else if ((attr & SHF_MERGE) != 0)
+ {
+ as_warn (_("entity size for SHF_MERGE not specified"));
+ attr &= ~SHF_MERGE;
+ }
+
+ if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ group_name = obj_elf_section_name ();
+ if (group_name == NULL)
+ attr &= ~SHF_GROUP;
+ else if (strncmp (input_line_pointer, ",comdat", 7) == 0)
+ {
+ input_line_pointer += 7;
+ linkonce = 1;
+ }
+ else if (strncmp (name, ".gnu.linkonce", 13) == 0)
+ linkonce = 1;
+ }
+ else if ((attr & SHF_GROUP) != 0)
+ {
+ as_warn (_("group name for SHF_GROUP not specified"));
+ attr &= ~SHF_GROUP;
+ }
+ }
+ else
+ {
+ do
+ {
+ char c;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer != '#')
+ {
+ as_bad (_("character following name is not '#'"));
+ ignore_rest_of_line ();
+ return;
+ }
+ beg = ++input_line_pointer;
+ c = get_symbol_end ();
+ *input_line_pointer = c;
+
+ attr |= obj_elf_section_word (beg, input_line_pointer - beg);
+
+ SKIP_WHITESPACE ();
+ }
+ while (*input_line_pointer++ == ',');
+ --input_line_pointer;
+ }
+ }
+
+ demand_empty_rest_of_line ();
+
+ obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push);
+}
+
+/* Change to the .data section. */
+
+void
+obj_elf_data (int i)
+{
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+ s_data (i);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+/* Change to the .text section. */
+
+void
+obj_elf_text (int i)
+{
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+ s_text (i);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+/* Change to the *ABS* section. */
+
+void
+obj_elf_struct (int i)
+{
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+ s_struct (i);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+static void
+obj_elf_subsection (int ignore ATTRIBUTE_UNUSED)
+{
+ register int temp;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+
+ temp = get_absolute_expression ();
+ subseg_set (now_seg, (subsegT) temp);
+ demand_empty_rest_of_line ();
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+/* This can be called from the processor backends if they change
+ sections. */
+
+void
+obj_elf_section_change_hook (void)
+{
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+}
+
+void
+obj_elf_previous (int ignore ATTRIBUTE_UNUSED)
+{
+ segT new_section;
+ int new_subsection;
+
+ if (previous_section == 0)
+ {
+ as_warn (_(".previous without corresponding .section; ignored"));
+ return;
+ }
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ new_section = previous_section;
+ new_subsection = previous_subsection;
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+ subseg_set (new_section, new_subsection);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+static void
+obj_elf_popsection (int xxx ATTRIBUTE_UNUSED)
+{
+ struct section_stack *top = section_stack;
+
+ if (top == NULL)
+ {
+ as_warn (_(".popsection without corresponding .pushsection; ignored"));
+ return;
+ }
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ section_stack = top->next;
+ previous_section = top->prev_seg;
+ previous_subsection = top->prev_subseg;
+ subseg_set (top->seg, top->subseg);
+ free (top);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
+static void
+obj_elf_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 (NULL, get_absolute_expression ());
+ demand_empty_rest_of_line ();
+}
+
+/* This handles the .symver pseudo-op, which is used to specify a
+ symbol version. The syntax is ``.symver NAME,SYMVERNAME''.
+ SYMVERNAME may contain ELF_VER_CHR ('@') characters. This
+ pseudo-op causes the assembler to emit a symbol named SYMVERNAME
+ with the same value as the symbol NAME. */
+
+static void
+obj_elf_symver (int ignore ATTRIBUTE_UNUSED)
+{
+ char *name;
+ char c;
+ char old_lexat;
+ 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 != ',')
+ {
+ as_bad (_("expected comma after name in .symver"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ name = input_line_pointer;
+
+ /* Temporarily include '@' in symbol names. */
+ old_lexat = lex_type[(unsigned char) '@'];
+ lex_type[(unsigned char) '@'] |= LEX_NAME;
+ c = get_symbol_end ();
+ lex_type[(unsigned char) '@'] = old_lexat;
+
+ if (symbol_get_obj (sym)->versioned_name == NULL)
+ {
+ symbol_get_obj (sym)->versioned_name = xstrdup (name);
+
+ *input_line_pointer = c;
+
+ if (strchr (symbol_get_obj (sym)->versioned_name,
+ ELF_VER_CHR) == NULL)
+ {
+ as_bad (_("missing version name in `%s' for symbol `%s'"),
+ symbol_get_obj (sym)->versioned_name,
+ S_GET_NAME (sym));
+ ignore_rest_of_line ();
+ return;
+ }
+ }
+ else
+ {
+ if (strcmp (symbol_get_obj (sym)->versioned_name, name))
+ {
+ as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"),
+ name, symbol_get_obj (sym)->versioned_name,
+ S_GET_NAME (sym));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ *input_line_pointer = c;
+ }
+
+ demand_empty_rest_of_line ();
+}
+
+/* This handles the .vtable_inherit pseudo-op, which is used to indicate
+ to the linker the hierarchy in which a particular table resides. The
+ syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */
+
+struct fix *
+obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED)
+{
+ char *cname, *pname;
+ symbolS *csym, *psym;
+ char c, bad = 0;
+
+ if (*input_line_pointer == '#')
+ ++input_line_pointer;
+
+ cname = input_line_pointer;
+ c = get_symbol_end ();
+ csym = symbol_find (cname);
+
+ /* GCFIXME: should check that we don't have two .vtable_inherits for
+ the same child symbol. Also, we can currently only do this if the
+ child symbol is already exists and is placed in a fragment. */
+
+ if (csym == NULL || symbol_get_frag (csym) == NULL)
+ {
+ as_bad ("expected `%s' to have already been set for .vtable_inherit",
+ cname);
+ bad = 1;
+ }
+
+ *input_line_pointer = c;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer != ',')
+ {
+ as_bad ("expected comma after name in .vtable_inherit");
+ ignore_rest_of_line ();
+ return NULL;
+ }
+
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer == '#')
+ ++input_line_pointer;
+
+ if (input_line_pointer[0] == '0'
+ && (input_line_pointer[1] == '\0'
+ || ISSPACE (input_line_pointer[1])))
+ {
+ psym = section_symbol (absolute_section);
+ ++input_line_pointer;
+ }
+ else
+ {
+ pname = input_line_pointer;
+ c = get_symbol_end ();
+ psym = symbol_find_or_make (pname);
+ *input_line_pointer = c;
+ }
+
+ demand_empty_rest_of_line ();
+
+ if (bad)
+ return NULL;
+
+ assert (symbol_get_value_expression (csym)->X_op == O_constant);
+ return fix_new (symbol_get_frag (csym),
+ symbol_get_value_expression (csym)->X_add_number,
+ 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT);
+}
+
+/* This handles the .vtable_entry pseudo-op, which is used to indicate
+ to the linker that a vtable slot was used. The syntax is
+ ".vtable_entry tablename, offset". */
+
+struct fix *
+obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED)
+{
+ char *name;
+ symbolS *sym;
+ offsetT offset;
+ char c;
+
+ if (*input_line_pointer == '#')
+ ++input_line_pointer;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ sym = symbol_find_or_make (name);
+ *input_line_pointer = c;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer != ',')
+ {
+ as_bad ("expected comma after name in .vtable_entry");
+ ignore_rest_of_line ();
+ return NULL;
+ }
+
+ ++input_line_pointer;
+ if (*input_line_pointer == '#')
+ ++input_line_pointer;
+
+ offset = get_absolute_expression ();
+
+ demand_empty_rest_of_line ();
+
+ return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0,
+ BFD_RELOC_VTABLE_ENTRY);
+}
+
+void
+elf_obj_read_begin_hook (void)
+{
+#ifdef NEED_ECOFF_DEBUG
+ if (ECOFF_DEBUGGING)
+ ecoff_read_begin_hook ();
+#endif
+}
+
+void
+elf_obj_symbol_new_hook (symbolS *symbolP)
+{
+ struct elf_obj_sy *sy_obj;
+
+ sy_obj = symbol_get_obj (symbolP);
+ sy_obj->size = NULL;
+ sy_obj->versioned_name = NULL;
+
+#ifdef NEED_ECOFF_DEBUG
+ if (ECOFF_DEBUGGING)
+ ecoff_symbol_new_hook (symbolP);
+#endif
+}
+
+/* When setting one symbol equal to another, by default we probably
+ want them to have the same "size", whatever it means in the current
+ context. */
+
+void
+elf_copy_symbol_attributes (symbolS *dest, symbolS *src)
+{
+ struct elf_obj_sy *srcelf = symbol_get_obj (src);
+ struct elf_obj_sy *destelf = symbol_get_obj (dest);
+ if (srcelf->size)
+ {
+ if (destelf->size == NULL)
+ destelf->size = xmalloc (sizeof (expressionS));
+ *destelf->size = *srcelf->size;
+ }
+ else
+ {
+ if (destelf->size != NULL)
+ free (destelf->size);
+ destelf->size = NULL;
+ }
+ S_SET_SIZE (dest, S_GET_SIZE (src));
+ /* Don't copy visibility. */
+ S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest))
+ | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1))));
+}
+
+void
+obj_elf_version (int ignore ATTRIBUTE_UNUSED)
+{
+ char *name;
+ unsigned int c;
+ char *p;
+ asection *seg = now_seg;
+ subsegT subseg = now_subseg;
+ Elf_Internal_Note i_note;
+ Elf_External_Note e_note;
+ asection *note_secp = NULL;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '\"')
+ {
+ unsigned int len;
+
+ ++input_line_pointer; /* -> 1st char of string. */
+ name = input_line_pointer;
+
+ while (is_a_char (c = next_char_of_string ()))
+ ;
+ c = *input_line_pointer;
+ *input_line_pointer = '\0';
+ *(input_line_pointer - 1) = '\0';
+ *input_line_pointer = c;
+
+ /* Create the .note section. */
+ note_secp = subseg_new (".note", 0);
+ bfd_set_section_flags (stdoutput,
+ note_secp,
+ SEC_HAS_CONTENTS | SEC_READONLY);
+
+ /* Process the version string. */
+ len = strlen (name) + 1;
+
+ /* PR 3456: Although the name field is padded out to an 4-byte
+ boundary, the namesz field should not be adjusted. */
+ i_note.namesz = len;
+ i_note.descsz = 0; /* No description. */
+ i_note.type = NT_VERSION;
+ p = frag_more (sizeof (e_note.namesz));
+ md_number_to_chars (p, i_note.namesz, sizeof (e_note.namesz));
+ p = frag_more (sizeof (e_note.descsz));
+ md_number_to_chars (p, i_note.descsz, sizeof (e_note.descsz));
+ p = frag_more (sizeof (e_note.type));
+ md_number_to_chars (p, i_note.type, sizeof (e_note.type));
+ p = frag_more (len);
+ memcpy (p, name, len);
+
+ frag_align (2, 0, 0);
+
+ subseg_set (seg, subseg);
+ }
+ else
+ as_bad (_("expected quoted string"));
+
demand_empty_rest_of_line ();
}
static void
-obj_elf_size ()
+obj_elf_size (int ignore ATTRIBUTE_UNUSED)
{
char *name = input_line_pointer;
char c = get_symbol_end ();
if (*input_line_pointer != ',')
{
*p = 0;
- as_bad ("expected comma after name `%s' in .size directive", name);
+ as_bad (_("expected comma after name `%s' in .size directive"), name);
*p = c;
ignore_rest_of_line ();
return;
expression (&exp);
if (exp.X_op == O_absent)
{
- as_bad ("missing expression in .size directive");
+ as_bad (_("missing expression in .size directive"));
exp.X_op = O_constant;
exp.X_add_number = 0;
}
sym = symbol_find_or_make (name);
*p = c;
if (exp.X_op == O_constant)
- S_SET_SIZE (sym, exp.X_add_number);
- else
{
-#if 0
- static int warned;
- if (!warned)
+ S_SET_SIZE (sym, exp.X_add_number);
+ if (symbol_get_obj (sym)->size)
{
- as_tsktsk (".size expressions not yet supported, ignored");
- warned++;
+ xfree (symbol_get_obj (sym)->size);
+ symbol_get_obj (sym)->size = NULL;
}
-#endif
+ }
+ else
+ {
+ symbol_get_obj (sym)->size = xmalloc (sizeof (expressionS));
+ *symbol_get_obj (sym)->size = exp;
}
demand_empty_rest_of_line ();
}
+/* Handle the ELF .type pseudo-op. This sets the type of a symbol.
+ There are five syntaxes:
+
+ The first (used on Solaris) is
+ .type SYM,#function
+ The second (used on UnixWare) is
+ .type SYM,@function
+ The third (reportedly to be used on Irix 6.0) is
+ .type SYM STT_FUNC
+ The fourth (used on NetBSD/Arm and Linux/ARM) is
+ .type SYM,%function
+ The fifth (used on SVR4/860) is
+ .type SYM,"function"
+ */
+
static void
-obj_elf_type ()
+obj_elf_type (int ignore ATTRIBUTE_UNUSED)
{
- char *name = input_line_pointer;
- char c = get_symbol_end ();
- char *p;
- int type = 0;
+ char *name;
+ char c;
+ int type;
+ const char *typename;
symbolS *sym;
+ elf_symbol_type *elfsym;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ sym = symbol_find_or_make (name);
+ elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym);
+ *input_line_pointer = c;
- p = input_line_pointer;
- *p = c;
SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- as_bad ("expected comma after name in .type directive");
- egress:
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++;
+ if (*input_line_pointer == ',')
+ ++input_line_pointer;
+
SKIP_WHITESPACE ();
- if (*input_line_pointer != '#')
- {
- as_bad ("expected `#' after comma in .type directive");
- goto egress;
- }
- input_line_pointer++;
- if (!strncmp ("function", input_line_pointer, sizeof ("function") - 1))
- {
- type = BSF_FUNCTION;
- input_line_pointer += sizeof ("function") - 1;
- }
- else if (!strncmp ("object", input_line_pointer, sizeof ("object") - 1))
- {
- input_line_pointer += sizeof ("object") - 1;
- }
+ if ( *input_line_pointer == '#'
+ || *input_line_pointer == '@'
+ || *input_line_pointer == '"'
+ || *input_line_pointer == '%')
+ ++input_line_pointer;
+
+ typename = input_line_pointer;
+ c = get_symbol_end ();
+
+ type = 0;
+ if (strcmp (typename, "function") == 0
+ || strcmp (typename, "STT_FUNC") == 0)
+ type = BSF_FUNCTION;
+ else if (strcmp (typename, "object") == 0
+ || strcmp (typename, "STT_OBJECT") == 0)
+ type = BSF_OBJECT;
+ else if (strcmp (typename, "tls_object") == 0
+ || strcmp (typename, "STT_TLS") == 0)
+ type = BSF_OBJECT | BSF_THREAD_LOCAL;
+ else if (strcmp (typename, "notype") == 0
+ || strcmp (typename, "STT_NOTYPE") == 0)
+ ;
+#ifdef md_elf_symbol_type
+ else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
+ ;
+#endif
else
- {
- as_bad ("unrecognized symbol type, ignored");
- goto egress;
- }
+ as_bad (_("unrecognized symbol type \"%s\""), typename);
+
+ *input_line_pointer = c;
+
+ if (*input_line_pointer == '"')
+ ++input_line_pointer;
+
+ elfsym->symbol.flags |= type;
+
demand_empty_rest_of_line ();
- *p = 0;
- sym = symbol_find_or_make (name);
- sym->bsym->flags |= type;
}
static void
-obj_elf_ident ()
+obj_elf_ident (int ignore ATTRIBUTE_UNUSED)
{
static segT comment_section;
segT old_section = now_seg;
int old_subsection = now_subseg;
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
if (!comment_section)
{
char *p;
comment_section = subseg_new (".comment", 0);
- bfd_set_section_flags (stdoutput, comment_section, SEC_HAS_CONTENTS);
+ bfd_set_section_flags (stdoutput, comment_section,
+ SEC_READONLY | SEC_HAS_CONTENTS);
p = frag_more (1);
*p = 0;
}
else
subseg_set (comment_section, 0);
- stringer (1);
+ stringer (8 + 1);
subseg_set (old_section, old_subsection);
}
-void
-elf_frob_file ()
+#ifdef INIT_STAB_SECTION
+
+/* The first entry in a .stabs section is special. */
+
+void
+obj_elf_init_stab_section (segT seg)
+{
+ char *file;
+ char *p;
+ char *stabstr_name;
+ unsigned int stroff;
+
+ /* Force the section to align to a longword boundary. Without this,
+ UnixWare ar crashes. */
+ bfd_set_section_alignment (stdoutput, seg, 2);
+
+ /* Make space for this first symbol. */
+ p = frag_more (12);
+ /* Zero it out. */
+ memset (p, 0, 12);
+ as_where (&file, NULL);
+ stabstr_name = xmalloc (strlen (segment_name (seg)) + 4);
+ strcpy (stabstr_name, segment_name (seg));
+ strcat (stabstr_name, "str");
+ stroff = get_stab_string_offset (file, stabstr_name);
+ know (stroff == 1);
+ md_number_to_chars (p, stroff, 4);
+ seg_info (seg)->stabu.p = p;
+}
+
+#endif
+
+/* Fill in the counts in the first entry in a .stabs section. */
+
+static void
+adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
+{
+ char *name;
+ asection *strsec;
+ char *p;
+ int strsz, nsyms;
+
+ if (strncmp (".stab", sec->name, 5))
+ return;
+ if (!strcmp ("str", sec->name + strlen (sec->name) - 3))
+ return;
+
+ name = alloca (strlen (sec->name) + 4);
+ strcpy (name, sec->name);
+ strcat (name, "str");
+ strsec = bfd_get_section_by_name (abfd, name);
+ if (strsec)
+ strsz = bfd_section_size (abfd, strsec);
+ else
+ strsz = 0;
+ nsyms = bfd_section_size (abfd, sec) / 12 - 1;
+
+ p = seg_info (sec)->stabu.p;
+ assert (p != 0);
+
+ bfd_h_put_16 (abfd, nsyms, p + 6);
+ bfd_h_put_32 (abfd, strsz, p + 8);
+}
+
+#ifdef NEED_ECOFF_DEBUG
+
+/* This function is called by the ECOFF code. It is supposed to
+ record the external symbol information so that the backend can
+ write it out correctly. The ELF backend doesn't actually handle
+ this at the moment, so we do it ourselves. We save the information
+ in the symbol. */
+
+#ifdef OBJ_MAYBE_ELF
+static
+#endif
+void
+elf_ecoff_set_ext (symbolS *sym, struct ecoff_extr *ext)
+{
+ symbol_get_bfdsym (sym)->udata.p = ext;
+}
+
+/* This function is called by bfd_ecoff_debug_externals. It is
+ supposed to *EXT to the external symbol information, and return
+ whether the symbol should be used at all. */
+
+static bfd_boolean
+elf_get_extr (asymbol *sym, EXTR *ext)
+{
+ if (sym->udata.p == NULL)
+ return FALSE;
+ *ext = *(EXTR *) sym->udata.p;
+ return TRUE;
+}
+
+/* This function is called by bfd_ecoff_debug_externals. It has
+ nothing to do for ELF. */
+
+static void
+elf_set_index (asymbol *sym ATTRIBUTE_UNUSED,
+ bfd_size_type indx ATTRIBUTE_UNUSED)
+{
+}
+
+#endif /* NEED_ECOFF_DEBUG */
+
+void
+elf_frob_symbol (symbolS *symp, int *puntp)
{
-#ifdef elf_tc_symbol
- int i;
+ struct elf_obj_sy *sy_obj;
+
+#ifdef NEED_ECOFF_DEBUG
+ if (ECOFF_DEBUGGING)
+ ecoff_frob_symbol (symp);
+#endif
+
+ sy_obj = symbol_get_obj (symp);
+
+ if (sy_obj->size != NULL)
+ {
+ switch (sy_obj->size->X_op)
+ {
+ case O_subtract:
+ S_SET_SIZE (symp,
+ (S_GET_VALUE (sy_obj->size->X_add_symbol)
+ + sy_obj->size->X_add_number
+ - S_GET_VALUE (sy_obj->size->X_op_symbol)));
+ break;
+ case O_constant:
+ S_SET_SIZE (symp,
+ (S_GET_VALUE (sy_obj->size->X_add_symbol)
+ + sy_obj->size->X_add_number));
+ break;
+ default:
+ as_bad (_(".size expression too complicated to fix up"));
+ break;
+ }
+ free (sy_obj->size);
+ sy_obj->size = NULL;
+ }
+
+ if (sy_obj->versioned_name != NULL)
+ {
+ char *p;
+
+ p = strchr (sy_obj->versioned_name, ELF_VER_CHR);
+ know (p != NULL);
+
+ /* This symbol was given a new name with the .symver directive.
+
+ If this is an external reference, just rename the symbol to
+ include the version string. This will make the relocs be
+ against the correct versioned symbol.
+
+ If this is a definition, add an alias. FIXME: Using an alias
+ will permit the debugging information to refer to the right
+ symbol. However, it's not clear whether it is the best
+ approach. */
+
+ if (! S_IS_DEFINED (symp))
+ {
+ /* Verify that the name isn't using the @@ syntax--this is
+ reserved for definitions of the default version to link
+ against. */
+ if (p[1] == ELF_VER_CHR)
+ {
+ as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"),
+ sy_obj->versioned_name);
+ *puntp = TRUE;
+ }
+ S_SET_NAME (symp, sy_obj->versioned_name);
+ }
+ else
+ {
+ if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
+ {
+ size_t l;
+
+ /* The @@@ syntax is a special case. It renames the
+ symbol name to versioned_name with one `@' removed. */
+ l = strlen (&p[3]) + 1;
+ memmove (&p[2], &p[3], l);
+ S_SET_NAME (symp, sy_obj->versioned_name);
+ }
+ else
+ {
+ symbolS *symp2;
+
+ /* FIXME: Creating a new symbol here is risky. We're
+ in the final loop over the symbol table. We can
+ get away with it only because the symbol goes to
+ the end of the list, where the loop will still see
+ it. It would probably be better to do this in
+ obj_frob_file_before_adjust. */
+
+ symp2 = symbol_find_or_make (sy_obj->versioned_name);
+
+ /* Now we act as though we saw symp2 = sym. */
+
+ S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp));
+
+ /* Subtracting out the frag address here is a hack
+ because we are in the middle of the final loop. */
+ S_SET_VALUE (symp2,
+ (S_GET_VALUE (symp)
+ - symbol_get_frag (symp)->fr_address));
+
+ symbol_set_frag (symp2, symbol_get_frag (symp));
+
+ /* This will copy over the size information. */
+ copy_symbol_attributes (symp2, symp);
+
+ S_SET_OTHER (symp2, S_GET_OTHER (symp));
+
+ if (S_IS_WEAK (symp))
+ S_SET_WEAK (symp2);
+
+ if (S_IS_EXTERNAL (symp))
+ S_SET_EXTERNAL (symp2);
+ }
+ }
+ }
+
+ /* Double check weak symbols. */
+ if (S_IS_WEAK (symp))
+ {
+ if (S_IS_COMMON (symp))
+ as_bad (_("symbol `%s' can not be both weak and common"),
+ S_GET_NAME (symp));
+ }
- for (i = 0; i < stdoutput->symcount; i++)
- elf_tc_symbol (stdoutput, (elf_symbol_type *) (stdoutput->outsymbols[i]), i + 1);
+#ifdef TC_MIPS
+ /* The Irix 5 and 6 assemblers set the type of any common symbol and
+ any undefined non-function symbol to STT_OBJECT. We try to be
+ compatible, since newer Irix 5 and 6 linkers care. However, we
+ only set undefined symbols to be STT_OBJECT if we are on Irix,
+ because that is the only time gcc will generate the necessary
+ .global directives to mark functions. */
+
+ if (S_IS_COMMON (symp))
+ symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
+
+ if (strstr (TARGET_OS, "irix") != NULL
+ && ! S_IS_DEFINED (symp)
+ && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0)
+ symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
#endif
+}
+
+struct group_list
+{
+ asection **head; /* Section lists. */
+ unsigned int *elt_count; /* Number of sections in each list. */
+ unsigned int num_group; /* Number of lists. */
+};
+
+/* Called via bfd_map_over_sections. If SEC is a member of a group,
+ add it to a list of sections belonging to the group. INF is a
+ pointer to a struct group_list, which is where we store the head of
+ each list. */
+
+static void
+build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
+{
+ struct group_list *list = inf;
+ const char *group_name = elf_group_name (sec);
+ unsigned int i;
+
+ if (group_name == NULL)
+ return;
+
+ /* If this group already has a list, add the section to the head of
+ the list. */
+ for (i = 0; i < list->num_group; i++)
+ {
+ if (strcmp (group_name, elf_group_name (list->head[i])) == 0)
+ {
+ elf_next_in_group (sec) = list->head[i];
+ list->head[i] = sec;
+ list->elt_count[i] += 1;
+ return;
+ }
+ }
+
+ /* New group. Make the arrays bigger in chunks to minimize calls to
+ realloc. */
+ i = list->num_group;
+ if ((i & 127) == 0)
+ {
+ unsigned int newsize = i + 128;
+ list->head = xrealloc (list->head, newsize * sizeof (*list->head));
+ list->elt_count = xrealloc (list->elt_count,
+ newsize * sizeof (*list->elt_count));
+ }
+ list->head[i] = sec;
+ list->elt_count[i] = 1;
+ list->num_group += 1;
+}
+
+void
+elf_frob_file (void)
+{
+ struct group_list list;
+ unsigned int i;
+
+ bfd_map_over_sections (stdoutput, adjust_stab_sections, NULL);
+
+ /* Go find section groups. */
+ list.num_group = 0;
+ list.head = NULL;
+ list.elt_count = NULL;
+ bfd_map_over_sections (stdoutput, build_group_lists, &list);
+
+ /* Make the SHT_GROUP sections that describe each section group. We
+ can't set up the section contents here yet, because elf section
+ indices have yet to be calculated. elf.c:set_group_contents does
+ the rest of the work. */
+ for (i = 0; i < list.num_group; i++)
+ {
+ const char *group_name = elf_group_name (list.head[i]);
+ const char *sec_name;
+ asection *s;
+ flagword flags;
+ struct symbol *sy;
+ int has_sym;
+ bfd_size_type size;
+
+ flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP;
+ for (s = list.head[i]; s != NULL; s = elf_next_in_group (s))
+ if ((s->flags ^ flags) & SEC_LINK_ONCE)
+ {
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+ if (s != list.head[i])
+ {
+ as_warn (_("assuming all members of group `%s' are COMDAT"),
+ group_name);
+ break;
+ }
+ }
+
+ sec_name = group_name;
+ sy = symbol_find_exact (group_name);
+ has_sym = 0;
+ if (sy != NULL
+ && (sy == symbol_lastP
+ || (sy->sy_next != NULL
+ && sy->sy_next->sy_previous == sy)))
+ {
+ has_sym = 1;
+ sec_name = ".group";
+ }
+ s = subseg_force_new (sec_name, 0);
+ if (s == NULL
+ || !bfd_set_section_flags (stdoutput, s, flags)
+ || !bfd_set_section_alignment (stdoutput, s, 2))
+ {
+ as_fatal (_("can't create group: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ }
+ elf_section_type (s) = SHT_GROUP;
+
+ /* Pass a pointer to the first section in this group. */
+ elf_next_in_group (s) = list.head[i];
+ if (has_sym)
+ elf_group_id (s) = sy->bsym;
+
+ size = 4 * (list.elt_count[i] + 1);
+ bfd_set_section_size (stdoutput, s, size);
+ s->contents = (unsigned char *) frag_more (size);
+ frag_now->fr_fix = frag_now_fix_octets ();
+ frag_wane (frag_now);
+ }
+
#ifdef elf_tc_final_processing
- elf_tc_final_processing_hook ();
+ elf_tc_final_processing ();
#endif
+}
+
+/* It removes any unneeded versioned symbols from the symbol table. */
+
+void
+elf_frob_file_before_adjust (void)
+{
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ if (!S_IS_DEFINED (symp))
+ {
+ if (symbol_get_obj (symp)->versioned_name)
+ {
+ char *p;
+
+ /* The @@@ syntax is a special case. If the symbol is
+ not defined, 2 `@'s will be removed from the
+ versioned_name. */
+
+ p = strchr (symbol_get_obj (symp)->versioned_name,
+ ELF_VER_CHR);
+ know (p != NULL);
+ if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
+ {
+ size_t l = strlen (&p[3]) + 1;
+ memmove (&p[1], &p[3], l);
+ }
+ if (symbol_used_p (symp) == 0
+ && symbol_used_in_reloc_p (symp) == 0)
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ }
+
+ /* If there was .weak foo, but foo was neither defined nor
+ used anywhere, remove it. */
+
+ else if (S_IS_WEAK (symp)
+ && symbol_used_p (symp) == 0
+ && symbol_used_in_reloc_p (symp) == 0)
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ }
+ }
+}
+
+/* It is required that we let write_relocs have the opportunity to
+ optimize away fixups before output has begun, since it is possible
+ to eliminate all fixups for a section and thus we never should
+ have generated the relocation section. */
+
+void
+elf_frob_file_after_relocs (void)
+{
+#ifdef NEED_ECOFF_DEBUG
+ if (ECOFF_DEBUGGING)
+ /* Generate the ECOFF debugging information. */
+ {
+ const struct ecoff_debug_swap *debug_swap;
+ struct ecoff_debug_info debug;
+ char *buf;
+ asection *sec;
+
+ debug_swap
+ = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap;
+ know (debug_swap != NULL);
+ ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap);
+
+ /* Set up the pointers in debug. */
+#define SET(ptr, offset, type) \
+ debug.ptr = (type) (buf + debug.symbolic_header.offset)
+
+ SET (line, cbLineOffset, unsigned char *);
+ SET (external_dnr, cbDnOffset, void *);
+ SET (external_pdr, cbPdOffset, void *);
+ SET (external_sym, cbSymOffset, void *);
+ SET (external_opt, cbOptOffset, void *);
+ SET (external_aux, cbAuxOffset, union aux_ext *);
+ SET (ss, cbSsOffset, char *);
+ SET (external_fdr, cbFdOffset, void *);
+ SET (external_rfd, cbRfdOffset, void *);
+ /* ssext and external_ext are set up just below. */
+
+#undef SET
+
+ /* Set up the external symbols. */
+ debug.ssext = debug.ssext_end = NULL;
+ debug.external_ext = debug.external_ext_end = NULL;
+ if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE,
+ elf_get_extr, elf_set_index))
+ as_fatal (_("failed to set up debugging information: %s"),
+ bfd_errmsg (bfd_get_error ()));
+
+ sec = bfd_get_section_by_name (stdoutput, ".mdebug");
+ assert (sec != NULL);
+
+ know (!stdoutput->output_has_begun);
+
+ /* We set the size of the section, call bfd_set_section_contents
+ to force the ELF backend to allocate a file position, and then
+ write out the data. FIXME: Is this really the best way to do
+ this? */
+ bfd_set_section_size
+ (stdoutput, sec, bfd_ecoff_debug_size (stdoutput, &debug, debug_swap));
+
+ /* Pass BUF to bfd_set_section_contents because this will
+ eventually become a call to fwrite, and ISO C prohibits
+ passing a NULL pointer to a stdio function even if the
+ pointer will not be used. */
+ if (! bfd_set_section_contents (stdoutput, sec, buf, 0, 0))
+ as_fatal (_("can't start writing .mdebug section: %s"),
+ bfd_errmsg (bfd_get_error ()));
+
+ know (stdoutput->output_has_begun);
+ know (sec->filepos != 0);
+
+ if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap,
+ sec->filepos))
+ as_fatal (_("could not write .mdebug section: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ }
+#endif /* NEED_ECOFF_DEBUG */
+}
+
+#ifdef SCO_ELF
+
+/* Heavily plagiarized from obj_elf_version. The idea is to emit the
+ SCO specific identifier in the .notes section to satisfy the SCO
+ linker.
+
+ This looks more complicated than it really is. As opposed to the
+ "obvious" solution, this should handle the cross dev cases
+ correctly. (i.e, hosting on a 64 bit big endian processor, but
+ generating SCO Elf code) Efficiency isn't a concern, as there
+ should be exactly one of these sections per object module.
+
+ SCO OpenServer 5 identifies it's ELF modules with a standard ELF
+ .note section.
+
+ int_32 namesz = 4 ; Name size
+ int_32 descsz = 12 ; Descriptive information
+ int_32 type = 1 ;
+ char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL
+ int_32 version = (major ver # << 16) | version of tools ;
+ int_32 source = (tool_id << 16 ) | 1 ;
+ int_32 info = 0 ; These are set by the SCO tools, but we
+ don't know enough about the source
+ environment to set them. SCO ld currently
+ ignores them, and recommends we set them
+ to zero. */
+
+#define SCO_MAJOR_VERSION 0x1
+#define SCO_MINOR_VERSION 0x1
+
+void
+sco_id (void)
+{
+
+ char *name;
+ unsigned int c;
+ char ch;
+ char *p;
+ asection *seg = now_seg;
+ subsegT subseg = now_subseg;
+ Elf_Internal_Note i_note;
+ Elf_External_Note e_note;
+ asection *note_secp = NULL;
+ int i, len;
+
+ /* create the .note section */
+
+ note_secp = subseg_new (".note", 0);
+ bfd_set_section_flags (stdoutput,
+ note_secp,
+ SEC_HAS_CONTENTS | SEC_READONLY);
+
+ /* process the version string */
+
+ i_note.namesz = 4;
+ i_note.descsz = 12; /* 12 descriptive bytes */
+ i_note.type = NT_VERSION; /* Contains a version string */
+
+ p = frag_more (sizeof (i_note.namesz));
+ md_number_to_chars (p, i_note.namesz, 4);
+
+ p = frag_more (sizeof (i_note.descsz));
+ md_number_to_chars (p, i_note.descsz, 4);
+
+ p = frag_more (sizeof (i_note.type));
+ md_number_to_chars (p, i_note.type, 4);
+
+ p = frag_more (4);
+ strcpy (p, "SCO");
+
+ /* Note: this is the version number of the ELF we're representing */
+ p = frag_more (4);
+ md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4);
+
+ /* Here, we pick a magic number for ourselves (yes, I "registered"
+ it with SCO. The bottom bit shows that we are compat with the
+ SCO ABI. */
+ p = frag_more (4);
+ md_number_to_chars (p, 0x4c520000 | 0x0001, 4);
- /* Finally, we must make any target-specific sections. */
+ /* If we knew (or cared) what the source language options were, we'd
+ fill them in here. SCO has given us permission to ignore these
+ and just set them to zero. */
+ p = frag_more (4);
+ md_number_to_chars (p, 0x0000, 4);
-#ifdef elf_tc_make_sections
- elf_tc_make_sections (stdoutput, NULL);
+ frag_align (2, 0, 0);
+
+ /* We probably can't restore the current segment, for there likely
+ isn't one yet... */
+ if (seg && subseg)
+ subseg_set (seg, subseg);
+
+}
+
+#endif /* SCO_ELF */
+
+static int
+elf_separate_stab_sections (void)
+{
+#ifdef NEED_ECOFF_DEBUG
+ return (!ECOFF_DEBUGGING);
+#else
+ return 1;
+#endif
+}
+
+static void
+elf_init_stab_section (segT seg)
+{
+#ifdef NEED_ECOFF_DEBUG
+ if (!ECOFF_DEBUGGING)
#endif
+ obj_elf_init_stab_section (seg);
}
+
+const struct format_ops elf_format_ops =
+{
+ bfd_target_elf_flavour,
+ 0, /* dfl_leading_underscore */
+ 1, /* emit_section_symbols */
+ elf_begin,
+ elf_file_symbol,
+ elf_frob_symbol,
+ elf_frob_file,
+ elf_frob_file_before_adjust,
+ 0, /* obj_frob_file_before_fix */
+ elf_frob_file_after_relocs,
+ elf_s_get_size, elf_s_set_size,
+ elf_s_get_align, elf_s_set_align,
+ elf_s_get_other,
+ elf_s_set_other,
+ 0, /* s_get_desc */
+ 0, /* s_set_desc */
+ 0, /* s_get_type */
+ 0, /* s_set_type */
+ elf_copy_symbol_attributes,
+#ifdef NEED_ECOFF_DEBUG
+ ecoff_generate_asm_lineno,
+ ecoff_stab,
+#else
+ 0, /* generate_asm_lineno */
+ 0, /* process_stab */
+#endif
+ elf_separate_stab_sections,
+ elf_init_stab_section,
+ elf_sec_sym_ok_for_reloc,
+ elf_pop_insert,
+#ifdef NEED_ECOFF_DEBUG
+ elf_ecoff_set_ext,
+#else
+ 0, /* ecoff_set_ext */
+#endif
+ elf_obj_read_begin_hook,
+ elf_obj_symbol_new_hook
+};
projects / binutils-gdb.git / blobdiff