/* 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 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+#define OBJ_HEADER "obj-elf.h"
#include "as.h"
+#include "safe-ctype.h"
#include "subsegs.h"
#include "obstack.h"
+#include "struc-symbol.h"
-static int obj_elf_write_symbol_p PARAMS ((symbolS *sym));
+#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
+
+static bfd_vma elf_s_get_size PARAMS ((symbolS *));
+static void elf_s_set_size PARAMS ((symbolS *, bfd_vma));
+static bfd_vma elf_s_get_align PARAMS ((symbolS *));
+static void elf_s_set_align PARAMS ((symbolS *, bfd_vma));
+static void elf_s_set_other PARAMS ((symbolS *, int));
+static int elf_sec_sym_ok_for_reloc PARAMS ((asection *));
+static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR));
+static void build_group_lists PARAMS ((bfd *, asection *, PTR));
+static int elf_separate_stab_sections PARAMS ((void));
+static void elf_init_stab_section PARAMS ((segT));
+static symbolS *elf_common PARAMS ((int));
+
+#ifdef NEED_ECOFF_DEBUG
+static bfd_boolean elf_get_extr PARAMS ((asymbol *, EXTR *));
+static void elf_set_index PARAMS ((asymbol *, bfd_size_type));
+#endif
static void obj_elf_line PARAMS ((int));
void obj_elf_version PARAMS ((int));
static void obj_elf_ident PARAMS ((int));
static void obj_elf_weak PARAMS ((int));
static void obj_elf_local PARAMS ((int));
-static void obj_elf_common PARAMS ((int));
-
-const pseudo_typeS obj_pseudo_table[] =
+static void obj_elf_visibility PARAMS ((int));
+static int obj_elf_parse_section_letters PARAMS ((char *, size_t));
+static int obj_elf_section_word PARAMS ((char *, size_t));
+static char *obj_elf_section_name PARAMS ((void));
+static int obj_elf_section_type PARAMS ((char *, size_t));
+static void obj_elf_symver PARAMS ((int));
+static void obj_elf_subsection PARAMS ((int));
+static void obj_elf_popsection PARAMS ((int));
+static void obj_elf_tls_common PARAMS ((int));
+
+static const pseudo_typeS elf_pseudo_table[] =
{
{"comm", obj_elf_common, 0},
+ {"common", obj_elf_common, 1},
{"ident", obj_elf_ident, 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 are used for stabs-in-elf configurations. */
+ /* 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. */
{"line", obj_elf_line, 0},
- /* 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 (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0},
+ {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0},
+
+ /* These are used for dwarf. */
{"2byte", cons, 2},
{"4byte", cons, 4},
{"8byte", cons, 8},
- {NULL} /* end sentinel */
+ /* We need to trap the section changing calls to handle .previous. */
+ {"data", obj_elf_data, 0},
+ {"text", obj_elf_text, 0},
+
+ {"tls_common", obj_elf_tls_common, 0},
+
+ /* End sentinel. */
+ {NULL, NULL, 0},
+};
+
+static const pseudo_typeS ecoff_debug_pseudo_table[] =
+{
+#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
+
+ {NULL, NULL, 0} /* end sentinel */
};
#undef NO_RELOC
#include "aout/aout64.h"
+/* This is called when the assembler starts. */
+
+void
+elf_begin ()
+{
+ /* Add symbols for the known sections to the symbol table. */
+ symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
+ TEXT_SECTION_NAME)));
+ symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
+ DATA_SECTION_NAME)));
+ symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
+ BSS_SECTION_NAME)));
+}
+
+void
+elf_pop_insert ()
+{
+ pop_insert (elf_pseudo_table);
+ if (ECOFF_DEBUGGING)
+ pop_insert (ecoff_debug_pseudo_table);
+}
+
+static bfd_vma
+elf_s_get_size (sym)
+ symbolS *sym;
+{
+ return S_GET_SIZE (sym);
+}
+
+static void
+elf_s_set_size (sym, sz)
+ symbolS *sym;
+ bfd_vma sz;
+{
+ S_SET_SIZE (sym, sz);
+}
+
+static bfd_vma
+elf_s_get_align (sym)
+ symbolS *sym;
+{
+ return S_GET_ALIGN (sym);
+}
+
+static void
+elf_s_set_align (sym, align)
+ symbolS *sym;
+ bfd_vma align;
+{
+ S_SET_ALIGN (sym, align);
+}
+
+int
+elf_s_get_other (sym)
+ symbolS *sym;
+{
+ return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other;
+}
+
+static void
+elf_s_set_other (sym, other)
+ symbolS *sym;
+ int other;
+{
+ S_SET_OTHER (sym, other);
+}
+
+static int
+elf_sec_sym_ok_for_reloc (sec)
+ asection *sec;
+{
+ return obj_sec_sym_ok_for_reloc (sec);
+}
+
void
elf_file_symbol (s)
- char *s;
+ const char *s;
{
symbolS *sym;
sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0);
- sym->sy_frag = &zero_address_frag;
- sym->bsym->flags |= BSF_FILE;
+ symbol_set_frag (sym, &zero_address_frag);
+ symbol_get_bfdsym (sym)->flags |= BSF_FILE;
if (symbol_rootP != sym)
{
verify_symbol_chain (symbol_rootP, symbol_lastP);
#endif
}
+
+#ifdef NEED_ECOFF_DEBUG
+ ecoff_new_file (s);
+#endif
}
-static void
-obj_elf_common (ignore)
- int ignore;
+static symbolS *
+elf_common (is_common)
+ int is_common;
{
char *name;
char c;
char *p;
- int temp, size;
+ offsetT temp, size, sign;
symbolS *symbolP;
+ int have_align;
+ expressionS exp;
+
+ if (flag_mri && is_common)
+ {
+ s_mri_common (0);
+ return NULL;
+ }
name = input_line_pointer;
c = get_symbol_end ();
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
- as_bad ("Expected comma after symbol-name");
+ as_bad (_("expected comma after symbol-name"));
ignore_rest_of_line ();
- return;
+ return NULL;
}
input_line_pointer++; /* skip ',' */
- if ((temp = get_absolute_expression ()) < 0)
+ temp = get_absolute_expr (&exp);
+ sign = (offsetT) 1 << (stdoutput->arch_info->bits_per_address - 1);
+ size = temp & ((sign << 1) - 1);
+ if (temp != size || !exp.X_unsigned)
{
- as_bad (".COMMon length (%d.) <0! Ignored.", temp);
+ as_bad (_(".COMMon length (%ld) out of range, ignored."), (long) temp);
ignore_rest_of_line ();
- return;
+ return NULL;
}
- size = temp;
*p = 0;
symbolP = symbol_find_or_make (name);
*p = c;
- if (S_IS_DEFINED (symbolP))
+ if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
{
- as_bad ("Ignoring attempt to re-define symbol");
+ as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP));
ignore_rest_of_line ();
- return;
+ return NULL;
}
if (S_GET_VALUE (symbolP) != 0)
{
- if (S_GET_VALUE (symbolP) != size)
+ if (S_GET_VALUE (symbolP) != (valueT) size)
{
- as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.",
- S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
+ as_warn (_("length of .comm \"%s\" is already %ld; not changed to %ld"),
+ S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP),
+ (long) size);
}
}
know (symbolP->sy_frag == &zero_address_frag);
if (*input_line_pointer != ',')
+ have_align = 0;
+ else
{
- as_bad ("Expected comma after common length");
- ignore_rest_of_line ();
- return;
+ have_align = 1;
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
}
- input_line_pointer++;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != '"')
+ if (! have_align || *input_line_pointer != '"')
{
- temp = get_absolute_expression ();
- if (temp < 0)
+ if (! have_align)
+ temp = 0;
+ else
{
- temp = 0;
- as_warn ("Common alignment negative; 0 assumed");
+ temp = get_absolute_expr (&exp);
+ if (!exp.X_unsigned)
+ {
+ temp = 0;
+ as_warn (_("common alignment negative; 0 assumed"));
+ }
}
- if (symbolP->local)
+ if (symbol_get_obj (symbolP)->local)
{
segT old_sec;
int old_subsec;
/* allocate_bss: */
old_sec = now_seg;
old_subsec = now_subseg;
- align = temp;
+ if (temp)
+ {
+ /* convert to a power of 2 alignment */
+ for (align = 0; (temp & 1) == 0; temp >>= 1, ++align);
+ if (temp != 1)
+ {
+ as_bad (_("common alignment not a power of 2"));
+ ignore_rest_of_line ();
+ return NULL;
+ }
+ }
+ else
+ align = 0;
record_alignment (bss_section, align);
subseg_set (bss_section, 0);
if (align)
- frag_align (align, 0);
+ frag_align (align, 0, 0);
if (S_GET_SEGMENT (symbolP) == bss_section)
- symbolP->sy_frag->fr_symbol = 0;
- symbolP->sy_frag = frag_now;
- pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size,
- (char *) 0);
+ symbol_get_frag (symbolP)->fr_symbol = 0;
+ symbol_set_frag (symbolP, frag_now);
+ pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
+ (offsetT) size, (char *) 0);
*pfrag = 0;
+ S_SET_SIZE (symbolP, size);
S_SET_SEGMENT (symbolP, bss_section);
S_CLEAR_EXTERNAL (symbolP);
subseg_set (old_sec, old_subsec);
{
allocate_common:
S_SET_VALUE (symbolP, (valueT) size);
+ S_SET_ALIGN (symbolP, temp);
S_SET_EXTERNAL (symbolP);
- /* should be common, but this is how gas does it for now */
- S_SET_SEGMENT (symbolP, &bfd_und_section);
+ S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
}
}
else
;
goto allocate_common;
}
+
+ symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
+
demand_empty_rest_of_line ();
- return;
+ return symbolP;
{
bad_common_segment:
p++;
c = *p;
*p = '\0';
- as_bad ("bad .common segment %s", input_line_pointer + 1);
+ as_bad (_("bad .common segment %s"), input_line_pointer + 1);
*p = c;
input_line_pointer = p;
ignore_rest_of_line ();
- return;
+ return NULL;
}
}
-static void
+void
+obj_elf_common (is_common)
+ int is_common;
+{
+ elf_common (is_common);
+}
+
+static void
+obj_elf_tls_common (ignore)
+ int ignore ATTRIBUTE_UNUSED;
+{
+ symbolS *symbolP = elf_common (0);
+
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL;
+}
+
+static void
obj_elf_local (ignore)
- int ignore;
+ int ignore ATTRIBUTE_UNUSED;
{
char *name;
int c;
*input_line_pointer = c;
SKIP_WHITESPACE ();
S_CLEAR_EXTERNAL (symbolP);
- symbolP->local = 1;
+ symbol_get_obj (symbolP)->local = 1;
if (c == ',')
{
input_line_pointer++;
demand_empty_rest_of_line ();
}
-static void
+static void
obj_elf_weak (ignore)
- int ignore;
+ int ignore ATTRIBUTE_UNUSED;
{
char *name;
int c;
*input_line_pointer = c;
SKIP_WHITESPACE ();
S_SET_WEAK (symbolP);
- symbolP->local = 1;
+ symbol_get_obj (symbolP)->local = 1;
if (c == ',')
{
input_line_pointer++;
demand_empty_rest_of_line ();
}
-static segT previous_section;
-static int previous_subsection;
-
-void
-obj_elf_section (xxx)
- int xxx;
+static void
+obj_elf_visibility (visibility)
+ int visibility;
{
- 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;
+ char *name;
+ int c;
+ symbolS *symbolP;
+ asymbol *bfdsym;
+ elf_symbol_type *elfsym;
- SKIP_WHITESPACE ();
- /* Get name of section. */
- if (*input_line_pointer == '"')
- string = demand_copy_C_string (&xxx);
- else
+ do
{
- char *p = input_line_pointer;
- char c;
- while (0 == strchr ("\n\t,; ", *p))
- p++;
- c = *p;
- *p = 0;
- string = xmalloc ((unsigned long) (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 | SEC_LOAD;
- else if (!strcmp (string, ".init")
- || !strcmp (string, ".fini"))
- default_flags = SEC_ALLOC | SEC_READONLY | SEC_RELOC | SEC_CODE | SEC_LOAD;
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ symbolP = symbol_find_or_make (name);
+ *input_line_pointer = c;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- flags = default_flags;
- while (*input_line_pointer == ',')
- {
- flagword bit;
- unsigned int len;
- int inv;
- char *p, oldp;
+ SKIP_WHITESPACE ();
- input_line_pointer++;
+ bfdsym = symbol_get_bfdsym (symbolP);
+ elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym);
- /* Under i386-svr4, gcc emits a string here. I don't know what this
- string is supposed to signify or how to handle it. Ignore it for
- now, unless it becomes a problem. */
- if (*input_line_pointer == '"')
+ assert (elfsym);
+
+ elfsym->internal_elf_sym.st_other &= ~3;
+ elfsym->internal_elf_sym.st_other |= visibility;
+
+ if (c == ',')
{
- demand_copy_C_string (&xxx);
+ input_line_pointer ++;
+
SKIP_WHITESPACE ();
- continue;
- }
- if (*input_line_pointer != '#' && *input_line_pointer != '@')
- {
- as_bad ("unrecognized syntax in .section command");
- ignore_rest_of_line ();
- break;
+ if (*input_line_pointer == '\n')
+ c = '\n';
}
- input_line_pointer++;
+ }
+ while (c == ',');
+
+ demand_empty_rest_of_line ();
+}
-#define CHECK(X,BIT,NEG) \
- if (!strncmp(X,input_line_pointer,len = sizeof(X) - 1)) { \
- bit = BIT; inv = NEG; goto match; }
+static segT previous_section;
+static int previous_subsection;
- CHECK ("write", SEC_READONLY, 1);
- CHECK ("alloc", SEC_ALLOC, 0);
- CHECK ("execinstr", SEC_CODE, 1);
- CHECK ("progbits", SEC_LOAD, 1);
-#undef CHECK
+struct section_stack
+{
+ struct section_stack *next;
+ segT seg, prev_seg;
+ int subseg, prev_subseg;
+};
- p = input_line_pointer;
- while (!is_end_of_line[(unsigned char) *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 ();
+static struct section_stack *section_stack;
+
+/* 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. */
+
+/* Certain named sections have particular defined types, listed on p.
+ 4-19 of the ABI. */
+struct special_section
+{
+ const char *name;
+ int type;
+ int attributes;
+};
- /* If the C string wasn't valid, `string' could be null. */
- if (!string)
- return;
+static struct special_section const special_sections[] =
+{
+ { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { ".comment", SHT_PROGBITS, 0 },
+ { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { ".debug", SHT_PROGBITS, 0 },
+#if defined (TC_HPPA) && !defined (TE_LINUX) && TARGET_ARCH_SIZE == 64
+ { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+#else
+ { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
+ { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
+#endif
+ { ".line", SHT_PROGBITS, 0 },
+ { ".note", SHT_NOTE, 0 },
+ { ".rodata", SHT_PROGBITS, SHF_ALLOC },
+ { ".rodata1", SHT_PROGBITS, SHF_ALLOC },
+ { ".tbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
+ { ".tdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
+ { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
+ { ".init_array",SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
+ { ".fini_array",SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
+ { ".preinit_array",SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
+
+#ifdef ELF_TC_SPECIAL_SECTIONS
+ ELF_TC_SPECIAL_SECTIONS
+#endif
- sec = bfd_get_section_by_name (stdoutput, string);
- if (sec == 0)
+#if 0
+ /* The following section names are special, but they can not
+ reasonably appear in assembler code. Some of the attributes are
+ processor dependent. */
+ { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ },
+ { ".dynstr", SHT_STRTAB, SHF_ALLOC },
+ { ".dynsym", SHT_DYNSYM, SHF_ALLOC },
+ { ".got", SHT_PROGBITS, 0 },
+ { ".hash", SHT_HASH, SHF_ALLOC },
+ { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ },
+ { ".plt", SHT_PROGBITS, 0 },
+ { ".shstrtab",SHT_STRTAB, 0 },
+ { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ },
+ { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ },
+#endif
+
+ { NULL, 0, 0 }
+};
+
+void
+obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push)
+ const char *name;
+ int type;
+ int attr;
+ int entsize;
+ const char *group_name;
+ int linkonce;
+ int push;
+{
+ asection *old_sec;
+ segT sec;
+ flagword flags;
+ int i;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ /* Switch to the section, creating it if necessary. */
+ if (push)
{
- sec = subseg_new (string, 0);
- bfd_set_section_flags (stdoutput, sec, flags);
- sec->output_section = sec;
+ 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;
- subseg_set (sec, 0);
-}
-void
-obj_elf_previous (ignore)
- int ignore;
-{
- if (previous_section == 0)
+ old_sec = bfd_get_section_by_name (stdoutput, name);
+ sec = subseg_new (name, 0);
+
+ /* See if this is one of the special sections. */
+ for (i = 0; special_sections[i].name != NULL; i++)
+ if (strcmp (name, special_sections[i].name) == 0)
+ {
+ if (type == SHT_NULL)
+ type = special_sections[i].type;
+ else if (type != special_sections[i].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. */
+ && special_sections[i].type != SHT_INIT_ARRAY
+ && special_sections[i].type != SHT_FINI_ARRAY
+ && special_sections[i].type != SHT_PREINIT_ARRAY)
+ {
+ as_warn (_("setting incorrect section type for %s"), name);
+ }
+ else
+ {
+ as_warn (_("ignoring incorrect section type for %s"), name);
+ type = special_sections[i].type;
+ }
+ }
+ if ((attr &~ special_sections[i].attributes) != 0
+ && old_sec == NULL)
+ {
+ /* As a GNU extension, we permit a .note section to be
+ allocatable. If the linker sees an allocateable .note
+ section, it will create a PT_NOTE segment in the output
+ file. */
+ if (strcmp (name, ".note") != 0
+ || attr != SHF_ALLOC)
+ as_warn (_("setting incorrect section attributes for %s"),
+ name);
+ }
+ attr |= special_sections[i].attributes;
+ break;
+ }
+
+ /* 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 (old_sec == NULL)
{
- as_bad (".previous without corresponding .section; ignored");
- return;
+ symbolS *secsym;
+
+ /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
+ if (type == SHT_NOBITS)
+ seg_info (sec)->bss = 1;
+
+ if (linkonce)
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+ 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));
}
- subseg_set (previous_section, previous_subsection);
- previous_section = 0;
+ else 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);
+ if ((attr & SHF_GROUP) != 0
+ && strcmp (elf_group_name (old_sec), group_name) != 0)
+ as_warn (_("ignoring new section group for %s"), name);
+ }
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
}
static int
-obj_elf_write_symbol_p (sym)
- symbolS *sym;
+obj_elf_parse_section_letters (str, len)
+ char *str;
+ size_t len;
{
- /* 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. */
+ int attr = 0;
- if (S_IS_LOCAL (sym))
+ while (len > 0)
{
- asymbol *bsym = sym->bsym;
- bfd *abfd = bsym->the_bfd;
- asection *bsec;
-
- for (bsec = abfd->sections; bsec; bsec = bsec->next)
+ switch (*str)
{
- 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
+ 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')
{
- /* 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;
+ 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_warn ("%s", bad_msg);
+ attr = -1;
+ }
+ }
+ break;
}
+ str++, len--;
}
- return 0;
-}
-int
-obj_elf_write_symbol (sym)
- symbolS *sym;
-{
- return /* obj_elf_write_symbol_p (sym) || */ !S_IS_LOCAL (sym);
+ return attr;
}
-int
-obj_elf_frob_symbol (sym, punt)
- symbolS *sym;
- int *punt;
+static int
+obj_elf_section_word (str, len)
+ char *str;
+ size_t len;
{
-#if 0 /* ?? The return value is ignored. Only the value of *punt is
- relevant. */
- return obj_elf_write_symbol_p (sym);
+ 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
- /* FIXME: Just return 0 until is fixed. */
- return 0;
-}
-
-static void
-obj_elf_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 ();
-}
-void
-obj_read_begin_hook ()
-{
+ as_warn (_("unrecognized section attribute"));
+ return 0;
}
-void
-obj_symbol_new_hook (symbolP)
- symbolS *symbolP;
+static int
+obj_elf_section_type (str, len)
+ char *str;
+ size_t len;
{
-#if 0 /* BFD already takes care of this */
- elf32_symbol_type *esym = (elf32_symbol_type *) symbolP;
+ if (len == 8 && strncmp (str, "progbits", 8) == 0)
+ return SHT_PROGBITS;
+ if (len == 6 && strncmp (str, "nobits", 6) == 0)
+ return SHT_NOBITS;
- /* There is an Elf_Internal_Sym and an Elf_External_Sym. For now,
- just zero them out. */
-
- 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));
+#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;
}
-void
-obj_elf_version (ignore)
- int ignore;
+/* Get name of section. */
+static char *
+obj_elf_section_name ()
{
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;
SKIP_WHITESPACE ();
- if (*input_line_pointer == '\"')
+ if (*input_line_pointer == '"')
{
- ++input_line_pointer; /* -> 1st char of string. */
- name = input_line_pointer;
+ int dummy;
- while (is_a_char (c = next_char_of_string ()))
- ;
- c = *input_line_pointer;
- *input_line_pointer = '\0';
+ 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_warn (_("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 (push)
+ 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_warn (_("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 (i)
+ 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 (i)
+ 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
+}
+
+static void
+obj_elf_subsection (ignore)
+ 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 ()
+{
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+}
+
+void
+obj_elf_previous (ignore)
+ 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 (xxx)
+ 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 (ignore)
+ 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 ();
+}
+
+/* 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 (ignore)
+ 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 (ignore)
+ 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 (ignore)
+ 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 ()
+{
+#ifdef NEED_ECOFF_DEBUG
+ if (ECOFF_DEBUGGING)
+ ecoff_read_begin_hook ();
+#endif
+}
+
+void
+elf_obj_symbol_new_hook (symbolP)
+ 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 (dest, src)
+ symbolS *dest, *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 =
+ (expressionS *) 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 (ignore)
+ 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 = (asection *) NULL;
+ int len;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '\"')
+ {
+ ++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;
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);
+ md_number_to_chars (p, (valueT) i_note.namesz, sizeof (e_note.namesz));
p = frag_more (sizeof (e_note.descsz));
- md_number_to_chars (p, (valueT) i_note.descsz, 4);
+ md_number_to_chars (p, (valueT) i_note.descsz, sizeof (e_note.descsz));
p = frag_more (sizeof (e_note.type));
- md_number_to_chars (p, (valueT) i_note.type, 4);
+ md_number_to_chars (p, (valueT) i_note.type, sizeof (e_note.type));
+ p = frag_more (len + 1);
+ strcpy (p, name);
- for (i = 0; i < len; i++)
- {
- ch = *(name + i);
- {
- FRAG_APPEND_1_CHAR (ch);
- }
- }
- frag_align (2, 0);
+ frag_align (2, 0, 0);
subseg_set (seg, subseg);
}
else
{
- as_bad ("Expected quoted string");
+ as_bad (_("expected quoted string"));
}
demand_empty_rest_of_line ();
}
static void
obj_elf_size (ignore)
- int ignore;
+ 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 =
+ (expressionS *) 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 (ignore)
- int ignore;
+ 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 != '#' && *input_line_pointer != '@')
- {
- as_bad ("expected `#' or `@' 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;
+#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 (ignore)
- int ignore;
+ 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;
}
subseg_set (old_section, old_subsection);
}
+#ifdef INIT_STAB_SECTION
+
+/* The first entry in a .stabs section is special. */
+
+void
+obj_elf_init_stab_section (seg)
+ 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, (unsigned int *) NULL);
+ stabstr_name = (char *) 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 (abfd, sec, xxx)
bfd *abfd;
asection *sec;
- PTR xxx;
+ PTR xxx ATTRIBUTE_UNUSED;
{
char *name;
asection *strsec;
p = seg_info (sec)->stabu.p;
assert (p != 0);
- bfd_h_put_16 (abfd, (bfd_vma) nsyms, p + 6);
- bfd_h_put_32 (abfd, (bfd_vma) strsz, p + 8);
+ bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6);
+ bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) 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. */
+
+void
+elf_ecoff_set_ext (sym, ext)
+ symbolS *sym;
+ struct ecoff_extr *ext;
+{
+ symbol_get_bfdsym (sym)->udata.p = (PTR) 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 (sym, ext)
+ 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. */
+
+/*ARGSUSED*/
+static void
+elf_set_index (sym, indx)
+ asymbol *sym ATTRIBUTE_UNUSED;
+ bfd_size_type indx ATTRIBUTE_UNUSED;
+{
+}
+
+#endif /* NEED_ECOFF_DEBUG */
+
+void
+elf_frob_symbol (symp, puntp)
+ symbolS *symp;
+ int *puntp;
+{
+ 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));
+ }
+
+#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
+
+#if 0 /* TC_PPC */
+ /* If TC_PPC is defined, we used to force the type of a symbol to be
+ BSF_OBJECT if it was otherwise unset. This was required by some
+ version of VxWorks. Thomas de Lellis <tdel@windriver.com> says
+ that this is no longer needed, so it is now commented out. */
+ if ((symbol_get_bfdsym (symp)->flags
+ & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0
+ && S_IS_DEFINED (symp))
+ 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 (abfd, sec, inf)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ asection *sec;
+ PTR inf;
+{
+ struct group_list *list = (struct group_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
+void
elf_frob_file ()
{
+ struct group_list list;
+ unsigned int i;
+
bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0);
-#ifdef elf_tc_symbol
- {
- int i;
+ /* Go find section groups. */
+ list.num_group = 0;
+ list.head = NULL;
+ list.elt_count = NULL;
+ bfd_map_over_sections (stdoutput, build_group_lists, (PTR) &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;
+
+ 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;
+ }
+ }
- for (i = 0; i < stdoutput->symcount; i++)
- elf_tc_symbol (stdoutput, (PTR) (stdoutput->outsymbols[i]),
- i + 1);
- }
-#endif
+ 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 ()));
+ }
+
+ /* 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;
+
+ s->_raw_size = 4 * (list.elt_count[i] + 1);
+ s->contents = frag_more (s->_raw_size);
+ frag_now->fr_fix = frag_now_fix_octets ();
+ }
#ifdef elf_tc_final_processing
elf_tc_final_processing ();
#endif
+}
- /* Finally, we must make any target-specific sections. */
+/* It removes any unneeded versioned symbols from the symbol table. */
-#ifdef elf_tc_make_sections
- elf_tc_make_sections (stdoutput);
+void
+elf_frob_file_before_adjust ()
+{
+ 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 ()
+{
+#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 != (const struct ecoff_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, PTR);
+ SET (external_pdr, cbPdOffset, PTR);
+ SET (external_sym, cbSymOffset, PTR);
+ SET (external_opt, cbOptOffset, PTR);
+ SET (external_aux, cbAuxOffset, union aux_ext *);
+ SET (ss, cbSsOffset, char *);
+ SET (external_fdr, cbFdOffset, PTR);
+ SET (external_rfd, cbRfdOffset, PTR);
+ /* 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? */
+ sec->_raw_size = 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, (PTR) buf,
+ (file_ptr) 0, (bfd_size_type) 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 plagarized 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 ()
+{
+
+ 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;
+
+ /* 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, (valueT) i_note.namesz, 4);
+
+ p = frag_more (sizeof (i_note.descsz));
+ md_number_to_chars (p, (valueT) i_note.descsz, 4);
+
+ p = frag_more (sizeof (i_note.type));
+ md_number_to_chars (p, (valueT) 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);
+
+ /* 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);
+
+ 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 ()
+{
+#ifdef NEED_ECOFF_DEBUG
+ return (!ECOFF_DEBUGGING);
+#else
+ return 1;
+#endif
+}
+
+static void
+elf_init_stab_section (seg)
+ 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 / deliverable / binutils-gdb.git / blobdiff