diff options
Diffstat (limited to 'binutils-2.17/gas/config/obj-elf.c')
| -rw-r--r-- | binutils-2.17/gas/config/obj-elf.c | 2265 |
1 files changed, 0 insertions, 2265 deletions
diff --git a/binutils-2.17/gas/config/obj-elf.c b/binutils-2.17/gas/config/obj-elf.c deleted file mode 100644 index f922149c..00000000 --- a/binutils-2.17/gas/config/obj-elf.c +++ /dev/null @@ -1,2265 +0,0 @@ -/* ELF object file format - Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, - 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - - This file is part of GAS, the GNU Assembler. - - GAS is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, - or (at your option) any later version. - - GAS is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GAS; see the file COPYING. If not, write to the Free - Software Foundation, 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 "obstack.h" -#include "struc-symbol.h" -#include "dwarf2dbg.h" - -#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 - -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. */ - {"line", obj_elf_line, 0}, - - /* 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}, - {"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}, -}; - -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. */ - -asection *elf_com_section_ptr; - -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; -} - -void -elf_pop_insert (void) -{ - pop_insert (elf_pseudo_table); - if (ECOFF_DEBUGGING) - pop_insert (ecoff_debug_pseudo_table); -} - -static bfd_vma -elf_s_get_size (symbolS *sym) -{ - return S_GET_SIZE (sym); -} - -static void -elf_s_set_size (symbolS *sym, bfd_vma sz) -{ - S_SET_SIZE (sym, sz); -} - -static bfd_vma -elf_s_get_align (symbolS *sym) -{ - return S_GET_ALIGN (sym); -} - -static void -elf_s_set_align (symbolS *sym, bfd_vma align) -{ - S_SET_ALIGN (sym, align); -} - -int -elf_s_get_other (symbolS *sym) -{ - return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other; -} - -static void -elf_s_set_other (symbolS *sym, int other) -{ - S_SET_OTHER (sym, other); -} - -static int -elf_sec_sym_ok_for_reloc (asection *sec) -{ - return obj_sec_sym_ok_for_reloc (sec); -} - -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) - { - symbolS *sym; - - 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) - { - 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 - } - } - -#ifdef NEED_ECOFF_DEBUG - ecoff_new_file (s, appfile); -#endif -} - -/* Called from read.c:s_comm after we've parsed .comm symbol, size. - Parse a possible alignment value. */ - -symbolS * -elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size) -{ - addressT align = 0; - int is_local = symbol_get_obj (symbolP)->local; - - if (*input_line_pointer == ',') - { - char *save = input_line_pointer; - - input_line_pointer++; - SKIP_WHITESPACE (); - - if (*input_line_pointer == '"') - { - /* 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 - { - input_line_pointer = save; - align = parse_align (is_local); - if (align == (addressT) -1) - return NULL; - } - } - - if (is_local) - { - bss_alloc (symbolP, size, align); - S_CLEAR_EXTERNAL (symbolP); - } - else - { - S_SET_VALUE (symbolP, size); - S_SET_ALIGN (symbolP, align); - S_SET_EXTERNAL (symbolP); - S_SET_SEGMENT (symbolP, elf_com_section_ptr); - } - - symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; - - return symbolP; -} - -void -obj_elf_common (int is_common) -{ - if (flag_mri && is_common) - s_mri_common (0); - else - s_comm_internal (0, elf_common_parse); -} - -static void -obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED) -{ - symbolS *symbolP = s_comm_internal (0, elf_common_parse); - - if (symbolP) - symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL; -} - -static void -obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED) -{ - symbolS *symbolP = s_comm_internal (0, s_lcomm_internal); - - if (symbolP) - symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; -} - -static void -obj_elf_local (int ignore ATTRIBUTE_UNUSED) -{ - char *name; - int c; - symbolS *symbolP; - - do - { - name = input_line_pointer; - c = get_symbol_end (); - symbolP = symbol_find_or_make (name); - *input_line_pointer = c; - SKIP_WHITESPACE (); - S_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 (); -} - -static void -obj_elf_weak (int ignore ATTRIBUTE_UNUSED) -{ - char *name; - int c; - symbolS *symbolP; - - do - { - name = input_line_pointer; - c = get_symbol_end (); - symbolP = symbol_find_or_make (name); - *input_line_pointer = c; - SKIP_WHITESPACE (); - S_SET_WEAK (symbolP); - 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 (); -} - -static void -obj_elf_visibility (int visibility) -{ - char *name; - int c; - symbolS *symbolP; - asymbol *bfdsym; - elf_symbol_type *elfsym; - - do - { - name = input_line_pointer; - c = get_symbol_end (); - symbolP = symbol_find_or_make (name); - *input_line_pointer = c; - - SKIP_WHITESPACE (); - - bfdsym = symbol_get_bfdsym (symbolP); - elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); - - assert (elfsym); - - elfsym->internal_elf_sym.st_other &= ~3; - elfsym->internal_elf_sym.st_other |= visibility; - - if (c == ',') - { - input_line_pointer ++; - - 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; - 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; - 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; - - /* 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); - - 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, 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 + 1); - strcpy (p, name); - - 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 (int ignore ATTRIBUTE_UNUSED) -{ - char *name = input_line_pointer; - char c = get_symbol_end (); - char *p; - expressionS exp; - symbolS *sym; - - p = input_line_pointer; - *p = c; - SKIP_WHITESPACE (); - if (*input_line_pointer != ',') - { - *p = 0; - as_bad (_("expected comma after name `%s' in .size directive"), name); - *p = c; - ignore_rest_of_line (); - return; - } - input_line_pointer++; - expression (&exp); - if (exp.X_op == O_absent) - { - as_bad (_("missing expression in .size directive")); - exp.X_op = O_constant; - exp.X_add_number = 0; - } - *p = 0; - sym = symbol_find_or_make (name); - *p = c; - if (exp.X_op == O_constant) - { - S_SET_SIZE (sym, exp.X_add_number); - if (symbol_get_obj (sym)->size) - { - xfree (symbol_get_obj (sym)->size); - symbol_get_obj (sym)->size = NULL; - } - } - 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 (int ignore ATTRIBUTE_UNUSED) -{ - 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; - - SKIP_WHITESPACE (); - if (*input_line_pointer == ',') - ++input_line_pointer; - - SKIP_WHITESPACE (); - 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 \"%s\""), typename); - - *input_line_pointer = c; - - if (*input_line_pointer == '"') - ++input_line_pointer; - - elfsym->symbol.flags |= type; - - demand_empty_rest_of_line (); -} - -static void -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_READONLY | SEC_HAS_CONTENTS); - p = frag_more (1); - *p = 0; - } - else - subseg_set (comment_section, 0); - stringer (1); - 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 (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. */ - -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) -{ - 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 -} - -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 (); - } - -#ifdef elf_tc_final_processing - 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); - - /* 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 (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 -}; |