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-rw-r--r--ld/ChangeLog29
-rw-r--r--ld/emultempl/beos.em3
-rw-r--r--ld/emultempl/pe.em7
-rw-r--r--ld/emultempl/pep.em7
-rw-r--r--ld/emultempl/spuelf.em2
-rw-r--r--ld/emultempl/xtensaelf.em2
-rw-r--r--ld/ld.texinfo26
-rw-r--r--ld/ldctor.c6
-rw-r--r--ld/ldexp.c16
-rw-r--r--ld/ldexp.h3
-rw-r--r--ld/ldgram.y12
-rw-r--r--ld/ldlang.c4
-rw-r--r--ld/ldlex.l1
-rw-r--r--ld/mri.c2
14 files changed, 96 insertions, 24 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog
index c066fef..451f110 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,32 @@
+2012-08-06 Maciej W. Rozycki <macro@codesourcery.com>
+
+ * ldexp.h (etree_union): Add defsym member to the assign member
+ structure.
+ (exp_assign): Add hidden argument to prototype.
+ * ldexp.c (exp_fold_tree_1): Use the defsym member to handle
+ --defsym symbols.
+ (exp_assop): Add defsym argument, initialize the defsym member
+ of the assign structure.
+ (exp_assign): Handle hidden symbols.
+ (exp_defsym): Update to use the defsym argument to exp_assop.
+ (exp_provide): Update to handle the defsym argument to exp_assop.
+ * ldlex.l (HIDDEN): New token.
+ * ldgram.y (HIDDEN): Likewise.
+ (assignment, section): Update calls to exp_assign.
+ * ldctor.c (ldctor_build_sets): Likewise.
+ * mri.c (mri_format): Likewise.
+ * ldlang.c (lang_insert_orphan, lang_leave_overlay): Likewise.
+ (open_input_bfds): Remove --defsym symbols special case.
+ * emultempl/beos.em (gld_${EMULATION_NAME}_set_symbols): Update
+ call to exp_assign.
+ * emultempl/pe.em (gld_${EMULATION_NAME}_set_symbols): Likewise.
+ * emultempl/pep.em (gld_${EMULATION_NAME}_set_symbols): Likewise.
+ * emultempl/spuelf.em (spu_place_special_section): Likewise.
+ * emultempl/xtensaelf.em (ld_xtensa_insert_page_offsets):
+ Likewise.
+ * ld.texinfo (Assigning Values to Symbols): Add HIDDEN.
+ (HIDDEN): New subsection.
+
2012-07-31 H.J. Lu <hongjiu.lu@intel.com>
PR ld/14156
diff --git a/ld/emultempl/beos.em b/ld/emultempl/beos.em
index 2071d8e..f59e000 100644
--- a/ld/emultempl/beos.em
+++ b/ld/emultempl/beos.em
@@ -348,7 +348,8 @@ gld_${EMULATION_NAME}_set_symbols (void)
for (j = 0; init[j].ptr; j++)
{
long val = init[j].value;
- lang_add_assignment (exp_assign (init[j].symbol, exp_intop (val)));
+ lang_add_assignment (exp_assign (init[j].symbol, exp_intop (val),
+ FALSE));
if (init[j].size == sizeof(short))
*(short *)init[j].ptr = val;
else if (init[j].size == sizeof(int))
diff --git a/ld/emultempl/pe.em b/ld/emultempl/pe.em
index 947f6ad..a565eb7 100644
--- a/ld/emultempl/pe.em
+++ b/ld/emultempl/pe.em
@@ -944,7 +944,7 @@ gld_${EMULATION_NAME}_set_symbols (void)
lang_assignment_statement_type *rv;
rv = lang_add_assignment (exp_assign (GET_INIT_SYMBOL_NAME (j),
- exp_intop (val)));
+ exp_intop (val), FALSE));
if (init[j].size == sizeof (short))
*(short *) init[j].ptr = val;
else if (init[j].size == sizeof (int))
@@ -1721,8 +1721,9 @@ gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIB
= pe_def_file->base_address;
init[IMAGEBASEOFF].inited = 1;
if (image_base_statement)
- image_base_statement->exp = exp_assign ("__image_base__",
- exp_intop (pe.ImageBase));
+ image_base_statement->exp
+ = exp_assign ("__image_base__", exp_intop (pe.ImageBase),
+ FALSE);
}
if (pe_def_file->stack_reserve != -1
diff --git a/ld/emultempl/pep.em b/ld/emultempl/pep.em
index d3f5c83..fc3cdc3 100644
--- a/ld/emultempl/pep.em
+++ b/ld/emultempl/pep.em
@@ -856,7 +856,7 @@ gld_${EMULATION_NAME}_set_symbols (void)
lang_assignment_statement_type *rv;
rv = lang_add_assignment (exp_assign (GET_INIT_SYMBOL_NAME (j),
- exp_intop (val)));
+ exp_intop (val), FALSE));
if (init[j].size == sizeof (short))
*(short *) init[j].ptr = (short) val;
else if (init[j].size == sizeof (int))
@@ -1522,8 +1522,9 @@ gld_${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry ATTRIB
= pep_def_file->base_address;
init[IMAGEBASEOFF].inited = 1;
if (image_base_statement)
- image_base_statement->exp = exp_assign ("__image_base__",
- exp_intop (pep.ImageBase));
+ image_base_statement->exp
+ = exp_assign ("__image_base__", exp_intop (pep.ImageBase),
+ FALSE);
}
if (pep_def_file->stack_reserve != -1
diff --git a/ld/emultempl/spuelf.em b/ld/emultempl/spuelf.em
index eef57aa..1b35612 100644
--- a/ld/emultempl/spuelf.em
+++ b/ld/emultempl/spuelf.em
@@ -165,7 +165,7 @@ spu_place_special_section (asection *s, asection *o, const char *output_name)
push_stat_ptr (&os->children);
e_size = exp_intop (params.line_size - s->size);
- lang_add_assignment (exp_assign (".", e_size));
+ lang_add_assignment (exp_assign (".", e_size, FALSE));
pop_stat_ptr ();
}
lang_add_section (&os->children, s, NULL, os);
diff --git a/ld/emultempl/xtensaelf.em b/ld/emultempl/xtensaelf.em
index b37a67b..1e6eb07 100644
--- a/ld/emultempl/xtensaelf.em
+++ b/ld/emultempl/xtensaelf.em
@@ -1887,7 +1887,7 @@ ld_xtensa_insert_page_offsets (bfd_vma dot,
etree_type *name_op = exp_nameop (NAME, ".");
etree_type *addend_op = exp_intop (1 << xtensa_page_power);
etree_type *add_op = exp_binop ('+', name_op, addend_op);
- etree_type *assign_op = exp_assign (".", add_op);
+ etree_type *assign_op = exp_assign (".", add_op, FALSE);
lang_assignment_statement_type *assign_stmt;
lang_statement_union_type *assign_union;
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index d0a5d90..dd3149c 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -3410,6 +3410,7 @@ the symbol and place it into the symbol table with a global scope.
@menu
* Simple Assignments:: Simple Assignments
+* HIDDEN:: HIDDEN
* PROVIDE:: PROVIDE
* PROVIDE_HIDDEN:: PROVIDE_HIDDEN
* Source Code Reference:: How to use a linker script defined symbol in source code
@@ -3473,6 +3474,31 @@ the last @samp{.text} input section. The symbol @samp{_bdata} will be
defined as the address following the @samp{.text} output section aligned
upward to a 4 byte boundary.
+@node HIDDEN
+@subsection HIDDEN
+@cindex HIDDEN
+For ELF targeted ports, define a symbol that will be hidden and won't be
+exported. The syntax is @code{HIDDEN(@var{symbol} = @var{expression})}.
+
+Here is the example from @ref{Simple Assignments}, rewritten to use
+@code{HIDDEN}:
+
+@smallexample
+HIDDEN(floating_point = 0);
+SECTIONS
+@{
+ .text :
+ @{
+ *(.text)
+ HIDDEN(_etext = .);
+ @}
+ HIDDEN(_bdata = (. + 3) & ~ 3);
+ .data : @{ *(.data) @}
+@}
+@end smallexample
+@noindent
+In this case none of the three symbols will be visible outside this module.
+
@node PROVIDE
@subsection PROVIDE
@cindex PROVIDE
diff --git a/ld/ldctor.c b/ld/ldctor.c
index 1a86eb3..b29c1e0 100644
--- a/ld/ldctor.c
+++ b/ld/ldctor.c
@@ -321,9 +321,11 @@ ldctor_build_sets (void)
lang_add_assignment (exp_assign (".",
exp_unop (ALIGN_K,
- exp_intop (reloc_size))));
+ exp_intop (reloc_size)),
+ FALSE));
lang_add_assignment (exp_assign (p->h->root.string,
- exp_nameop (NAME, ".")));
+ exp_nameop (NAME, "."),
+ FALSE));
lang_add_data (size, exp_intop (p->count));
for (e = p->elements; e != NULL; e = e->next)
diff --git a/ld/ldexp.c b/ld/ldexp.c
index be296bc..cc43b72 100644
--- a/ld/ldexp.c
+++ b/ld/ldexp.c
@@ -892,7 +892,7 @@ exp_fold_tree_1 (etree_type *tree)
if (expld.result.valid_p
|| (expld.phase <= lang_mark_phase_enum
&& tree->type.node_class == etree_assign
- && tree->assign.hidden))
+ && tree->assign.defsym))
{
if (h == NULL)
{
@@ -1054,6 +1054,7 @@ static etree_type *
exp_assop (const char *dst,
etree_type *src,
enum node_tree_enum class,
+ bfd_boolean defsym,
bfd_boolean hidden)
{
etree_type *n;
@@ -1065,20 +1066,25 @@ exp_assop (const char *dst,
n->assign.type.node_class = class;
n->assign.src = src;
n->assign.dst = dst;
+ n->assign.defsym = defsym;
n->assign.hidden = hidden;
return n;
}
+/* Handle linker script assignments and HIDDEN. */
+
etree_type *
-exp_assign (const char *dst, etree_type *src)
+exp_assign (const char *dst, etree_type *src, bfd_boolean hidden)
{
- return exp_assop (dst, src, etree_assign, FALSE);
+ return exp_assop (dst, src, etree_assign, FALSE, hidden);
}
+/* Handle --defsym command-line option. */
+
etree_type *
exp_defsym (const char *dst, etree_type *src)
{
- return exp_assop (dst, src, etree_assign, TRUE);
+ return exp_assop (dst, src, etree_assign, TRUE, FALSE);
}
/* Handle PROVIDE. */
@@ -1086,7 +1092,7 @@ exp_defsym (const char *dst, etree_type *src)
etree_type *
exp_provide (const char *dst, etree_type *src, bfd_boolean hidden)
{
- return exp_assop (dst, src, etree_provide, hidden);
+ return exp_assop (dst, src, etree_provide, FALSE, hidden);
}
/* Handle ASSERT. */
diff --git a/ld/ldexp.h b/ld/ldexp.h
index 586dd13..187016c 100644
--- a/ld/ldexp.h
+++ b/ld/ldexp.h
@@ -67,6 +67,7 @@ typedef union etree_union {
node_type type;
const char *dst;
union etree_union *src;
+ bfd_boolean defsym;
bfd_boolean hidden;
} assign;
struct {
@@ -199,7 +200,7 @@ etree_type *exp_unop
etree_type *exp_nameop
(int, const char *);
etree_type *exp_assign
- (const char *, etree_type *);
+ (const char *, etree_type *, bfd_boolean);
etree_type *exp_defsym
(const char *, etree_type *);
etree_type *exp_provide
diff --git a/ld/ldgram.y b/ld/ldgram.y
index 6e00118..ee88196 100644
--- a/ld/ldgram.y
+++ b/ld/ldgram.y
@@ -146,7 +146,7 @@ static int error_index;
%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
%token ORIGIN FILL
%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
-%token ALIGNMOD AT SUBALIGN PROVIDE PROVIDE_HIDDEN AS_NEEDED
+%token ALIGNMOD AT SUBALIGN HIDDEN PROVIDE PROVIDE_HIDDEN AS_NEEDED
%type <token> assign_op atype attributes_opt sect_constraint
%type <name> filename
%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
@@ -759,7 +759,7 @@ end: ';' | ','
assignment:
NAME '=' mustbe_exp
{
- lang_add_assignment (exp_assign ($1, $3));
+ lang_add_assignment (exp_assign ($1, $3, FALSE));
}
| NAME assign_op mustbe_exp
{
@@ -767,7 +767,11 @@ assignment:
exp_binop ($2,
exp_nameop (NAME,
$1),
- $3)));
+ $3), FALSE));
+ }
+ | HIDDEN '(' NAME '=' mustbe_exp ')'
+ {
+ lang_add_assignment (exp_assign ($3, $5, TRUE));
}
| PROVIDE '(' NAME '=' mustbe_exp ')'
{
@@ -1085,7 +1089,7 @@ section: NAME { ldlex_expression(); }
opt_exp_with_type
{
ldlex_popstate ();
- lang_add_assignment (exp_assign (".", $3));
+ lang_add_assignment (exp_assign (".", $3, FALSE));
}
'{' sec_or_group_p1 '}'
| INCLUDE filename
diff --git a/ld/ldlang.c b/ld/ldlang.c
index 0f5c91a3..0c97898 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -3286,7 +3286,7 @@ open_input_bfds (lang_statement_union_type *s, enum open_bfd_mode mode)
#endif
break;
case lang_assignment_statement_enum:
- if (s->assignment_statement.exp->assign.hidden)
+ if (s->assignment_statement.exp->assign.defsym)
/* This is from a --defsym on the command line. */
exp_fold_tree_no_dot (s->assignment_statement.exp);
break;
@@ -7437,7 +7437,7 @@ lang_leave_overlay (etree_type *lma_expr,
{
overlay_list->os->update_dot = 1;
overlay_list->os->update_dot_tree
- = exp_assign (".", exp_binop ('+', overlay_vma, overlay_max));
+ = exp_assign (".", exp_binop ('+', overlay_vma, overlay_max), FALSE);
}
l = overlay_list;
diff --git a/ld/ldlex.l b/ld/ldlex.l
index c24d1ab..abe31c0 100644
--- a/ld/ldlex.l
+++ b/ld/ldlex.l
@@ -320,6 +320,7 @@ V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
<BOTH,SCRIPT>"PHDRS" { RTOKEN (PHDRS); }
<EXPRESSION,BOTH,SCRIPT>"AT" { RTOKEN(AT);}
<EXPRESSION,BOTH,SCRIPT>"SUBALIGN" { RTOKEN(SUBALIGN);}
+<EXPRESSION,BOTH,SCRIPT>"HIDDEN" { RTOKEN(HIDDEN); }
<EXPRESSION,BOTH,SCRIPT>"PROVIDE" { RTOKEN(PROVIDE); }
<EXPRESSION,BOTH,SCRIPT>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
<EXPRESSION,BOTH,SCRIPT>"KEEP" { RTOKEN(KEEP); }
diff --git a/ld/mri.c b/ld/mri.c
index 91b40dc..fc7076a 100644
--- a/ld/mri.c
+++ b/ld/mri.c
@@ -297,7 +297,7 @@ mri_format (const char *name)
void
mri_public (const char *name, etree_type *exp)
{
- lang_add_assignment (exp_assign (name, exp));
+ lang_add_assignment (exp_assign (name, exp, FALSE));
}
void
generated by cgit v1.1 at 2024-12-23 13:09:10 +0000