bfd/
2005-08-05 H.J. Lu <hongjiu.lu@intel.com> * bfd.c (bfd_hide_symbol): New. * bfd-in2.h: Regenerated. ld/ 2005-08-05 H.J. Lu <hongjiu.lu@intel.com> * ld.texinfo: Document PROVIDE_HIDDEN. * ldexp.c (exp_fold_tree_1): Hide a provided symbol if asked. (exp_provide): Add and set hidden. * ldexp.h (etree_type): Add hidden to assign. * ldgram.y (PROVIDE_HIDDEN): New. * ldlex.l (PROVIDE_HIDDEN): Likewise. * scripttempl/elf.sc: Use PROVIDE_HIDDEN on array bound symbols.
This commit is contained in:
H.J. Lu
parent
9599dfb1f6
commit
7af8e99880
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@ -1,3 +1,8 @@
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2005-08-05 H.J. Lu <hongjiu.lu@intel.com>
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* bfd.c (bfd_hide_symbol): New.
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* bfd-in2.h: Regenerated.
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2005-08-04 H.J. Lu <hongjiu.lu@intel.com>
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* elf64-x86-64.c (elf64_x86_64_merge_symbol): When mixing a
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@ -4486,6 +4486,10 @@ void bfd_preserve_restore (bfd *, struct bfd_preserve *);
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void bfd_preserve_finish (bfd *, struct bfd_preserve *);
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void bfd_hide_symbol
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(bfd *, struct bfd_link_info *,
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struct bfd_link_hash_entry *, bfd_boolean);
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/* Extracted from archive.c. */
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symindex bfd_get_next_mapent
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(bfd *abfd, symindex previous, carsym **sym);
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26
bfd/bfd.c
26
bfd/bfd.c
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@ -1508,3 +1508,29 @@ bfd_preserve_finish (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_preserve *preserve)
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objalloc. */
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bfd_hash_table_free (&preserve->section_htab);
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}
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/*
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FUNCTION
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bfd_hide_symbol
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SYNOPSIS
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void bfd_hide_symbol (bfd *,
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struct bfd_link_info *,
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struct bfd_link_hash_entry *,
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bfd_boolean);
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DESCRIPTION
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This function hides a symbol so that it won't be exported.
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*/
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void
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bfd_hide_symbol (bfd *abfd,
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struct bfd_link_info *link_info,
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struct bfd_link_hash_entry *h,
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bfd_boolean force_local)
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{
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if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
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(get_elf_backend_data (abfd)->elf_backend_hide_symbol)
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(link_info, (struct elf_link_hash_entry *) h, force_local);
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}
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15
ld/ChangeLog
15
ld/ChangeLog
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@ -1,3 +1,18 @@
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2005-08-05 H.J. Lu <hongjiu.lu@intel.com>
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* ld.texinfo: Document PROVIDE_HIDDEN.
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* ldexp.c (exp_fold_tree_1): Hide a provided symbol if asked.
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(exp_provide): Add and set hidden.
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* ldexp.h (etree_type): Add hidden to assign.
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* ldgram.y (PROVIDE_HIDDEN): New.
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* ldlex.l (PROVIDE_HIDDEN): Likewise.
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* scripttempl/elf.sc: Use PROVIDE_HIDDEN on array bound
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symbols.
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2005-08-05 Alan Modra <amodra@bigpond.net.au>
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* emulparams/elf_x86_64.sh: Revert last change.
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@ -2779,6 +2779,7 @@ the symbol and place it into the symbol table with a global scope.
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@menu
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* Simple Assignments:: Simple Assignments
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* PROVIDE:: PROVIDE
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* PROVIDE_HIDDEN:: PROVIDE_HIDDEN
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* Source Code Reference:: How to use a linker script defined symbol in source code
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@end menu
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@ -2872,6 +2873,12 @@ underscore), the linker will silently use the definition in the program.
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If the program references @samp{etext} but does not define it, the
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linker will use the definition in the linker script.
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@node PROVIDE_HIDDEN
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@subsection PROVIDE_HIDDEN
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@cindex PROVIDE_HIDDEN
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Similar to @code{PROVIDE}. For ELF targeted ports, the symbol will be
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hidden and won't be exported.
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@node Source Code Reference
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@subsection Source Code Reference
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@ -740,6 +740,8 @@ exp_fold_tree_1 (etree_type *tree)
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defined by some object. */
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break;
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}
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if (tree->assign.hidden)
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bfd_hide_symbol (output_bfd, &link_info, h, TRUE);
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}
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exp_fold_tree_1 (tree->assign.src);
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@ -884,7 +886,7 @@ exp_assop (int code, const char *dst, etree_type *src)
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/* Handle PROVIDE. */
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etree_type *
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exp_provide (const char *dst, etree_type *src)
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exp_provide (const char *dst, etree_type *src, bfd_boolean hidden)
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{
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etree_type *n;
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@ -893,6 +895,7 @@ exp_provide (const char *dst, etree_type *src)
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n->assign.type.node_class = etree_provide;
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n->assign.src = src;
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n->assign.dst = dst;
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n->assign.hidden = hidden;
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return n;
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}
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@ -63,6 +63,7 @@ typedef union etree_union {
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node_type type;
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const char *dst;
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union etree_union *src;
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bfd_boolean hidden;
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} assign;
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struct {
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node_type type;
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@ -165,7 +166,7 @@ etree_type *exp_nameop
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etree_type *exp_assop
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(int, const char *, etree_type *);
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etree_type *exp_provide
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(const char *, etree_type *);
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(const char *, etree_type *, bfd_boolean);
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etree_type *exp_assert
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(etree_type *, const char *);
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void exp_print_tree
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@ -142,7 +142,7 @@ static int error_index;
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%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
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%token ORIGIN FILL
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%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
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%token ALIGNMOD AT SUBALIGN PROVIDE AS_NEEDED
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%token ALIGNMOD AT SUBALIGN PROVIDE PROVIDE_HIDDEN AS_NEEDED
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%type <token> assign_op atype attributes_opt sect_constraint
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%type <name> filename
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%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
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@ -648,7 +648,11 @@ assignment:
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}
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| PROVIDE '(' NAME '=' mustbe_exp ')'
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{
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lang_add_assignment (exp_provide ($3, $5));
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lang_add_assignment (exp_provide ($3, $5, FALSE));
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}
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| PROVIDE_HIDDEN '(' NAME '=' mustbe_exp ')'
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{
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lang_add_assignment (exp_provide ($3, $5, TRUE));
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}
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;
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@ -313,6 +313,7 @@ V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
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<EXPRESSION,BOTH,SCRIPT>"AT" { RTOKEN(AT);}
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<EXPRESSION,BOTH,SCRIPT>"SUBALIGN" { RTOKEN(SUBALIGN);}
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<EXPRESSION,BOTH,SCRIPT>"PROVIDE" { RTOKEN(PROVIDE); }
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<EXPRESSION,BOTH,SCRIPT>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
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<EXPRESSION,BOTH,SCRIPT>"KEEP" { RTOKEN(KEEP); }
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<EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE" { RTOKEN(EXCLUDE_FILE); }
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<MRI>"#".*\n? { ++ lineno; }
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@ -379,21 +379,21 @@ cat <<EOF
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.preinit_array ${RELOCATING-0} :
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{
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_start = .);}}
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KEEP (*(.preinit_array))
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_end = .);}}
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}
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.init_array ${RELOCATING-0} :
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{
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_start = .);}}
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KEEP (*(.init_array))
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_end = .);}}
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}
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.fini_array ${RELOCATING-0} :
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{
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_start = .);}}
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KEEP (*(.fini_array))
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_end = .);}}
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}
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${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
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${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
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