* xcofflink.c: More improvements, mostly to fix handling of
constructors and a few other special cases. * coff-rs6000.c (rs6000coff_vec): Set symbol_leading_char back to zero, reverting yesterday's change. * bfd-in.h (bfd_xcoff_link_record_set): Declare. (bfd_xcoff_link_count_reloc): Declare. (bfd_xcoff_record_link_assignment): Declare. * bfd-in2.h: Rebuild.
This commit is contained in:
Ian Lance Taylor
parent
0fb3e100cb
commit
2d7de17d61
5 changed files with 320 additions and 60 deletions
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@ -1,3 +1,14 @@
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Fri Oct 27 18:14:39 1995 Ian Lance Taylor <ian@cygnus.com>
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* xcofflink.c: More improvements, mostly to fix handling of
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constructors and a few other special cases.
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* coff-rs6000.c (rs6000coff_vec): Set symbol_leading_char back to
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zero, reverting yesterday's change.
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* bfd-in.h (bfd_xcoff_link_record_set): Declare.
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(bfd_xcoff_link_count_reloc): Declare.
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(bfd_xcoff_record_link_assignment): Declare.
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* bfd-in2.h: Rebuild.
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start-sanitize-gm
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Fri Oct 27 09:41:51 1995 Stu Grossman (grossman@cygnus.com)
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@ -602,12 +602,19 @@ extern boolean bfd_linux_size_dynamic_sections
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/* XCOFF support routines for the linker. */
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extern boolean bfd_xcoff_link_record_set
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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bfd_size_type));
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extern boolean bfd_xcoff_import_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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bfd_vma, const char *, const char *, const char *));
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extern boolean bfd_xcoff_export_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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boolean));
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extern boolean bfd_xcoff_link_count_reloc
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PARAMS ((bfd *, struct bfd_link_info *, const char *));
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extern boolean bfd_xcoff_record_link_assignment
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PARAMS ((bfd *, struct bfd_link_info *, const char *));
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extern boolean bfd_xcoff_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *, const char *, const char *,
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unsigned long, unsigned long, unsigned long, boolean,
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@ -602,12 +602,19 @@ extern boolean bfd_linux_size_dynamic_sections
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/* XCOFF support routines for the linker. */
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extern boolean bfd_xcoff_link_record_set
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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bfd_size_type));
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extern boolean bfd_xcoff_import_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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bfd_vma, const char *, const char *, const char *));
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extern boolean bfd_xcoff_export_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *,
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boolean));
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extern boolean bfd_xcoff_link_count_reloc
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PARAMS ((bfd *, struct bfd_link_info *, const char *));
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extern boolean bfd_xcoff_record_link_assignment
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PARAMS ((bfd *, struct bfd_link_info *, const char *));
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extern boolean bfd_xcoff_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *, const char *, const char *,
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unsigned long, unsigned long, unsigned long, boolean,
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@ -1353,8 +1353,7 @@ const bfd_target rs6000coff_vec =
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HAS_SYMS | HAS_LOCALS | WP_TEXT),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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/* Making the leading_char a period should make for nicer messages. */
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'.', /* leading char */
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0, /* leading char */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen??? FIXMEmgo */
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352
bfd/xcofflink.c
352
bfd/xcofflink.c
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@ -286,6 +286,8 @@ struct xcoff_link_hash_entry
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#define XCOFF_BUILT_LDSYM (01000)
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/* Symbol is mentioned by a section which was not garbage collected. */
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#define XCOFF_MARK (02000)
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/* Symbol size is recorded in size_list list from hash table. */
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#define XCOFF_HAS_SIZE (04000)
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/* The storage mapping class. */
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unsigned char smclas;
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@ -333,6 +335,14 @@ struct xcoff_link_hash_table
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/* Whether garbage collection was done. */
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boolean gc;
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/* A linked list of symbols for which we have size information. */
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struct xcoff_link_size_list
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{
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struct xcoff_link_size_list *next;
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struct xcoff_link_hash_entry *h;
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bfd_size_type size;
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} *size_list;
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};
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/* Information we keep for each section in the output file during the
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@ -345,6 +355,16 @@ struct xcoff_link_section_info
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/* For each reloc against a global symbol whose index was not known
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when the reloc was handled, the global hash table entry. */
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struct xcoff_link_hash_entry **rel_hashes;
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/* If there is a TOC relative reloc against a global symbol, and the
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index of the TOC symbol is not known when the reloc was handled,
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an entry is added to this linked list. This is not an array,
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like rel_hashes, because this case is quite uncommon. */
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struct xcoff_toc_rel_hash
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{
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struct xcoff_toc_rel_hash *next;
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struct xcoff_link_hash_entry *h;
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struct internal_reloc *rel;
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} *toc_rel_hashes;
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};
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/* Information that we pass around while doing the final link step. */
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@ -1564,7 +1584,8 @@ xcoff_link_add_symbols (abfd, info)
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flag = XCOFF_DEF_REGULAR;
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(*sym_hash)->flags |= flag;
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if ((*sym_hash)->smclas == XMC_UA)
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if ((*sym_hash)->smclas == XMC_UA
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|| flag == XCOFF_DEF_REGULAR)
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(*sym_hash)->smclas = aux.x_csect.x_smclas;
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}
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}
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@ -1850,6 +1871,40 @@ xcoff_link_add_dynamic_symbols (abfd, info)
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/* Routines that are called after all the input files have been
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handled, but before the sections are laid out in memory. */
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/* Record the number of elements in a set. This is used to output the
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correct csect length. */
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boolean
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bfd_xcoff_link_record_set (output_bfd, info, harg, size)
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bfd *output_bfd;
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struct bfd_link_info *info;
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struct bfd_link_hash_entry *harg;
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bfd_size_type size;
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{
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struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
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struct xcoff_link_size_list *n;
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/* This will hardly ever be called. I don't want to burn four bytes
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per global symbol, so instead the size is kept on a linked list
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attached to the hash table. */
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n = ((struct xcoff_link_size_list *)
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bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
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if (n == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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return false;
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}
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n->next = xcoff_hash_table (info)->size_list;
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n->h = h;
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n->size = size;
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xcoff_hash_table (info)->size_list = n;
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h->flags |= XCOFF_HAS_SIZE;
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return true;
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}
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/* Import a symbol. */
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boolean
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@ -1956,6 +2011,79 @@ bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
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return true;
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}
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/* Count a reloc against a symbol. This is called for relocs
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generated by the linker script, typically for global constructors
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and destructors. */
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boolean
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bfd_xcoff_link_count_reloc (output_bfd, info, name)
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bfd *output_bfd;
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struct bfd_link_info *info;
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const char *name;
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{
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struct xcoff_link_hash_entry *h;
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h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, false, false,
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false);
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if (h == NULL)
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{
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(*_bfd_error_handler) ("%s: no such symbol", name);
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bfd_set_error (bfd_error_no_symbols);
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return false;
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}
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h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
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++xcoff_hash_table (info)->ldrel_count;
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/* Mark the symbol to avoid garbage collection. */
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if ((h->flags & XCOFF_MARK) == 0)
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{
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h->flags |= XCOFF_MARK;
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if (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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{
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asection *hsec;
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hsec = h->root.u.def.section;
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if ((hsec->flags & SEC_MARK) == 0)
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{
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if (! xcoff_mark (info, hsec))
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return false;
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}
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}
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if (h->toc_section != NULL
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&& (h->toc_section->flags & SEC_MARK) == 0)
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{
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if (! xcoff_mark (info, h->toc_section))
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return false;
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}
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}
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return true;
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}
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/* This function is called for each symbol to which the linker script
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assigns a value. */
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boolean
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bfd_xcoff_record_link_assignment (output_bfd, info, name)
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bfd *output_bfd;
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struct bfd_link_info *info;
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const char *name;
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{
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struct xcoff_link_hash_entry *h;
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h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
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false);
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if (h == NULL)
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return false;
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h->flags |= XCOFF_DEF_REGULAR;
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return true;
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}
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/* This structure is used to pass information through
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xcoff_link_hash_traverse. */
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@ -2904,6 +3032,7 @@ _bfd_xcoff_bfd_final_link (abfd, info)
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{
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finfo.section_info[i].relocs = NULL;
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finfo.section_info[i].rel_hashes = NULL;
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finfo.section_info[i].toc_rel_hashes = NULL;
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}
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}
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@ -3107,6 +3236,7 @@ _bfd_xcoff_bfd_final_link (abfd, info)
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struct internal_reloc *irel;
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struct internal_reloc *irelend;
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struct xcoff_link_hash_entry **rel_hash;
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struct xcoff_toc_rel_hash *toc_rel_hash;
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bfd_byte *erel;
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if (o->reloc_count == 0)
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@ -3131,6 +3261,21 @@ _bfd_xcoff_bfd_final_link (abfd, info)
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}
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}
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for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
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toc_rel_hash != NULL;
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toc_rel_hash = toc_rel_hash->next)
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{
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if (toc_rel_hash->h->u.toc_indx < 0)
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{
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if (! ((*info->callbacks->unattached_reloc)
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(info, toc_rel_hash->h->root.root.string,
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(bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
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goto error_return;
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toc_rel_hash->h->u.toc_indx = 0;
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}
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toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
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}
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/* XCOFF requires that the relocs be sorted by address. We tend
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to produce them in the order in which their containing csects
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appear in the symbol table, which is not necessarily by
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@ -4082,18 +4227,27 @@ xcoff_link_input_bfd (finfo, input_bfd)
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not the symbol itself. */
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BFD_ASSERT (h->toc_section != NULL);
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BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
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if (h->u.toc_indx == -1)
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if (h->u.toc_indx != -1)
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irel->r_symndx = h->u.toc_indx;
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else
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{
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/* We could handle this case if we had to,
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but I don't think it can arise. */
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(*_bfd_error_handler)
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("%s: unattached TOC reloc against `%s'",
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bfd_get_filename (input_bfd),
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h->root.root.string);
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bfd_set_error (bfd_error_bad_value);
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return false;
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struct xcoff_toc_rel_hash *n;
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struct xcoff_link_section_info *si;
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n = ((struct xcoff_toc_rel_hash *)
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bfd_alloc (finfo->output_bfd,
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sizeof (struct xcoff_toc_rel_hash)));
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if (n == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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return false;
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}
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si = finfo->section_info + target_index;
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n->next = si->toc_rel_hashes;
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n->h = h;
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n->rel = irel;
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si->toc_rel_hashes = n;
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}
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irel->r_symndx = h->u.toc_indx;
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}
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else if (h != NULL)
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{
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@ -4493,13 +4647,37 @@ xcoff_write_global_symbol (h, p)
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else if (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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{
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struct xcoff_link_size_list *l;
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isym.n_value = (h->root.u.def.section->output_section->vma
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+ h->root.u.def.section->output_offset
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+ h->root.u.def.value);
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isym.n_scnum = h->root.u.def.section->output_section->target_index;
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isym.n_sclass = C_HIDEXT;
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aux.x_csect.x_smtyp = XTY_SD;
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/* I don't know what the csect length should be in this case. */
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if ((h->flags & XCOFF_HAS_SIZE) != 0)
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{
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for (l = xcoff_hash_table (finfo->info)->size_list;
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l != NULL;
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l = l->next)
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{
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if (l->h == h)
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{
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aux.x_csect.x_scnlen.l = l->size;
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break;
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}
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}
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}
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}
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else if (h->root.type == bfd_link_hash_common)
|
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{
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isym.n_value = (h->root.u.c.p->section->output_section->vma
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+ h->root.u.c.p->section->output_offset);
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isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
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isym.n_sclass = C_EXT;
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aux.x_csect.x_smtyp = XTY_CM;
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aux.x_csect.x_scnlen.l = h->root.u.c.size;
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}
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else
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abort ();
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|
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@ -4559,8 +4737,22 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
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struct bfd_link_order *link_order;
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{
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reloc_howto_type *howto;
|
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struct xcoff_link_hash_entry *h;
|
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asection *hsec;
|
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bfd_vma hval;
|
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bfd_vma addend;
|
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struct internal_reloc *irel;
|
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struct xcoff_link_hash_entry **rel_hash_ptr;
|
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struct internal_ldrel ldrel;
|
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|
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if (link_order->type == bfd_section_reloc_link_order)
|
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{
|
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/* We need to somehow locate a symbol in the right section. The
|
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symbol must either have a value of zero, or we must adjust
|
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the addend by the value of the symbol. FIXME: Write this
|
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when we need it. The old linker couldn't handle this anyhow. */
|
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abort ();
|
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}
|
||||
|
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howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
|
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if (howto == NULL)
|
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|
|
@ -4569,7 +4761,42 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
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return false;
|
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}
|
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|
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if (link_order->u.reloc.p->addend != 0)
|
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h = xcoff_link_hash_lookup (xcoff_hash_table (finfo->info),
|
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link_order->u.reloc.p->u.name,
|
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false, false, true);
|
||||
if (h == NULL)
|
||||
{
|
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if (! ((*finfo->info->callbacks->unattached_reloc)
|
||||
(finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
|
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(asection *) NULL, (bfd_vma) 0)))
|
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return false;
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return true;
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||||
}
|
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|
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if (h->root.type == bfd_link_hash_common)
|
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{
|
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hsec = h->root.u.c.p->section;
|
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hval = 0;
|
||||
}
|
||||
else if (h->root.type == bfd_link_hash_defined
|
||||
|| h->root.type == bfd_link_hash_defweak)
|
||||
{
|
||||
hsec = h->root.u.def.section;
|
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hval = h->root.u.def.value;
|
||||
}
|
||||
else
|
||||
{
|
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hsec = NULL;
|
||||
hval = 0;
|
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}
|
||||
|
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addend = link_order->u.reloc.p->addend;
|
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if (hsec != NULL)
|
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addend += (hsec->output_section->vma
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+ hsec->output_offset
|
||||
+ hval);
|
||||
|
||||
if (addend != 0)
|
||||
{
|
||||
bfd_size_type size;
|
||||
bfd_byte *buf;
|
||||
|
|
@ -4584,8 +4811,7 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
|
|||
return false;
|
||||
}
|
||||
|
||||
rstat = _bfd_relocate_contents (howto, output_bfd,
|
||||
link_order->u.reloc.p->addend, buf);
|
||||
rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
|
||||
switch (rstat)
|
||||
{
|
||||
case bfd_reloc_ok:
|
||||
|
|
@ -4595,13 +4821,9 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
|
|||
abort ();
|
||||
case bfd_reloc_overflow:
|
||||
if (! ((*finfo->info->callbacks->reloc_overflow)
|
||||
(finfo->info,
|
||||
(link_order->type == bfd_section_reloc_link_order
|
||||
? bfd_section_name (output_bfd,
|
||||
link_order->u.reloc.p->u.section)
|
||||
: link_order->u.reloc.p->u.name),
|
||||
howto->name, link_order->u.reloc.p->addend,
|
||||
(bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
|
||||
(finfo->info, link_order->u.reloc.p->u.name,
|
||||
howto->name, addend, (bfd *) NULL, (asection *) NULL,
|
||||
(bfd_vma) 0)))
|
||||
{
|
||||
free (buf);
|
||||
return false;
|
||||
|
|
@ -4628,44 +4850,14 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
|
|||
|
||||
irel->r_vaddr = output_section->vma + link_order->offset;
|
||||
|
||||
if (link_order->type == bfd_section_reloc_link_order)
|
||||
{
|
||||
/* We need to somehow locate a symbol in the right section. The
|
||||
symbol must either have a value of zero, or we must adjust
|
||||
the addend by the value of the symbol. FIXME: Write this
|
||||
when we need it. The old linker couldn't handle this anyhow. */
|
||||
abort ();
|
||||
*rel_hash_ptr = NULL;
|
||||
irel->r_symndx = 0;
|
||||
}
|
||||
if (h->indx >= 0)
|
||||
irel->r_symndx = h->indx;
|
||||
else
|
||||
{
|
||||
struct xcoff_link_hash_entry *h;
|
||||
|
||||
h = xcoff_link_hash_lookup (xcoff_hash_table (finfo->info),
|
||||
link_order->u.reloc.p->u.name,
|
||||
false, false, true);
|
||||
if (h != NULL)
|
||||
{
|
||||
if (h->indx >= 0)
|
||||
irel->r_symndx = h->indx;
|
||||
else
|
||||
{
|
||||
/* Set the index to -2 to force this symbol to get
|
||||
written out. */
|
||||
h->indx = -2;
|
||||
*rel_hash_ptr = h;
|
||||
irel->r_symndx = 0;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (! ((*finfo->info->callbacks->unattached_reloc)
|
||||
(finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
|
||||
(asection *) NULL, (bfd_vma) 0)))
|
||||
return false;
|
||||
irel->r_symndx = 0;
|
||||
}
|
||||
/* Set the index to -2 to force this symbol to get written out. */
|
||||
h->indx = -2;
|
||||
*rel_hash_ptr = h;
|
||||
irel->r_symndx = 0;
|
||||
}
|
||||
|
||||
irel->r_type = howto->type;
|
||||
|
|
@ -4675,6 +4867,50 @@ xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
|
|||
|
||||
++output_section->reloc_count;
|
||||
|
||||
/* Now output the reloc to the .loader section. */
|
||||
|
||||
ldrel.l_vaddr = irel->r_vaddr;
|
||||
|
||||
if (hsec != NULL)
|
||||
{
|
||||
const char *secname;
|
||||
|
||||
secname = hsec->output_section->name;
|
||||
|
||||
if (strcmp (secname, ".text") == 0)
|
||||
ldrel.l_symndx = 0;
|
||||
else if (strcmp (secname, ".data") == 0)
|
||||
ldrel.l_symndx = 1;
|
||||
else if (strcmp (secname, ".bss") == 0)
|
||||
ldrel.l_symndx = 2;
|
||||
else
|
||||
{
|
||||
(*_bfd_error_handler)
|
||||
("%s: loader reloc in unrecognized section `%s'",
|
||||
bfd_get_filename (output_bfd), secname);
|
||||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (h->ldindx < 0)
|
||||
{
|
||||
(*_bfd_error_handler)
|
||||
("%s: `%s' in loader reloc but not loader sym",
|
||||
bfd_get_filename (output_bfd),
|
||||
h->root.root.string);
|
||||
bfd_set_error (bfd_error_bad_value);
|
||||
return false;
|
||||
}
|
||||
ldrel.l_symndx = h->ldindx;
|
||||
}
|
||||
|
||||
ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
|
||||
ldrel.l_rsecnm = output_section->target_index;
|
||||
xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
|
||||
++finfo->ldrel;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue