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binutils/SOURCES/binutils-ld-IR-override.patch

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diff -rup binutils.orig/include/bfdlink.h binutils-2.30/include/bfdlink.h
--- binutils.orig/include/bfdlink.h 2020-11-02 10:04:27.457826514 +0000
+++ binutils-2.30/include/bfdlink.h 2020-11-02 10:05:14.723537971 +0000
@@ -339,6 +339,9 @@ struct bfd_link_info
/* TRUE if the LTO plugin is active. */
unsigned int lto_plugin_active: 1;
+ /* TRUE if all LTO IR symbols have been read. */
+ unsigned int lto_all_symbols_read : 1;
+
/* TRUE if global symbols in discarded sections should be stripped. */
unsigned int strip_discarded: 1;
diff -rup binutils.orig/ld/ldlang.c binutils-2.30/ld/ldlang.c
--- binutils.orig/ld/ldlang.c 2020-11-02 10:04:16.852890551 +0000
+++ binutils-2.30/ld/ldlang.c 2020-11-02 10:06:12.285185841 +0000
@@ -7162,6 +7162,7 @@ lang_process (void)
if (plugin_call_all_symbols_read ())
einfo (_("%P%F: %s: plugin reported error after all symbols read\n"),
plugin_error_plugin ());
+ link_info.lto_all_symbols_read = TRUE;
/* Open any newly added files, updating the file chains. */
open_input_bfds (*added.tail, OPEN_BFD_NORMAL);
/* Restore the global list pointer now they have all been added. */
diff -rup binutils.orig/ld/plugin.c binutils-2.30/ld/plugin.c
--- binutils.orig/ld/plugin.c 2020-11-02 10:04:16.852890551 +0000
+++ binutils-2.30/ld/plugin.c 2020-11-02 10:08:11.010459546 +0000
@@ -1355,12 +1355,16 @@ plugin_notice (struct bfd_link_info *inf
new value from a real BFD. Weak symbols are not normally
overridden by a new weak definition, and strong symbols
will normally cause multiple definition errors. Avoid
- this by making the symbol appear to be undefined. */
- if (((h->type == bfd_link_hash_defweak
- || h->type == bfd_link_hash_defined)
- && is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
- || (h->type == bfd_link_hash_common
- && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner)))
+ this by making the symbol appear to be undefined.
+
+ NB: We change the previous definition in the IR object to
+ undefweak only after all LTO symbols have been read. */
+ if (info->lto_all_symbols_read
+ && (((h->type == bfd_link_hash_defweak
+ || h->type == bfd_link_hash_defined)
+ && is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
+ || (h->type == bfd_link_hash_common
+ && is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner))))
{
h->type = bfd_link_hash_undefweak;
h->u.undef.abfd = sym_bfd;
diff -rup binutils.orig/ld/testsuite/ld-plugin/lto.exp binutils-2.30/ld/testsuite/ld-plugin/lto.exp
--- binutils.orig/ld/testsuite/ld-plugin/lto.exp 2020-11-02 10:04:16.926890104 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/lto.exp 2020-11-02 10:12:09.551000288 +0000
@@ -214,6 +214,36 @@ set lto_link_tests [list \
[list "Build pr22502b.o" \
"$plug_opt" "-flto $lto_no_fat" \
{pr22502b.c}] \
+ [list "Build pr26262b.o" \
+ "" "-O2" \
+ {pr26262b.c} {} "" "c"] \
+ [list "Build pr26262c.o" \
+ "" "-O2" \
+ {pr26262c.c} {} "" "c"] \
+ [list "Build pr26267a.o" \
+ "" "-O2 -flto $lto_no_fat" \
+ {pr26267a.c} {} "" "c"] \
+ [list "Build pr26267b.o" \
+ "" "-O2" \
+ {pr26267b.c} {} "" "c"] \
+ [list "Build pr26267c.o" \
+ "" "-O2" \
+ {pr26267c.c} {} "" "c"] \
+ [list "Build pr26267a" \
+ "" "-O2" \
+ {pr26267a.c} {} "" "c"] \
+ [list "Build pr26267a" \
+ "-flto tmpdir/pr26267a.o tmpdir/pr26267b.o tmpdir/pr26267c.o" \
+ "-flto $lto_no_fat" \
+ {dummy.c} \
+ {{error_output "pr26267.err"}} \
+ "pr26267a"] \
+ [list "Build pr26267b" \
+ "-flto tmpdir/pr26267b.o tmpdir/pr26267c.o tmpdir/pr26267a.o" \
+ "-flto $lto_no_fat" \
+ {dummy.c} \
+ {{error_output "pr26267.err"}} \
+ "pr26267b"] \
]
if { [at_least_gcc_version 4 7] } {
@@ -373,6 +403,16 @@ set lto_run_tests [list \
[list "Run pr22502" \
"-O2 -flto tmpdir/pr22502a.o tmpdir/pr22502b.o" "" \
{dummy.c} "pr20267" "pass.out" "-flto -O2" "c"] \
+ [list "Run pr26262a" \
+ "-O2 -flto" "" \
+ {pr26262a.c} "pr26262a" "pass.out" \
+ "-flto -O2" "c" "" \
+ "tmpdir/pr26262b.o tmpdir/pr26262c.o"] \
+ [list "Run pr26262b" \
+ "-flto -O2 tmpdir/pr26262b.o tmpdir/pr26262c.o" "" \
+ {pr26262a.c} "pr26262b" "pass.out" \
+ "-flto -O2" "c" "" \
+ ""] \
]
if { [at_least_gcc_version 4 7] } {
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26262a.c
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26262b.c
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26267.err
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26267a.c
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26267b.c
Only in binutils-2.30/ld/testsuite/ld-plugin: pr26267c.c
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26262a.c 2020-11-02 10:13:16.624589913 +0000
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int counter;
+extern void foo (void);
+extern void xxx (void);
+
+void
+bar (void)
+{
+}
+
+int
+main(void)
+{
+ bar ();
+ foo ();
+ xxx ();
+ if (counter == 1)
+ printf ("PASS\n");
+ return 0;
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26262b.c 2020-11-02 10:13:27.358523487 +0000
@@ -0,0 +1,16 @@
+#include <stdlib.h>
+
+extern int counter;
+
+void
+foo (void)
+{
+ counter++;
+}
+
+__attribute__((weak))
+void
+bar (void)
+{
+ abort ();
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26262c.c 2020-11-02 10:47:59.031665605 +0000
@@ -0,0 +1,6 @@
+extern void bar (void);
+void
+xxx (void)
+{
+ bar ();
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26267c.c 2020-11-02 10:13:39.665447327 +0000
@@ -0,0 +1,6 @@
+extern void bar (void);
+void
+xxx (void)
+{
+ bar ();
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26267b.c 2020-11-02 10:13:43.648422679 +0000
@@ -0,0 +1,15 @@
+#include <stdlib.h>
+
+extern int counter;
+
+void
+foo (void)
+{
+ counter++;
+}
+
+void
+bar (void)
+{
+ abort ();
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26267a.c 2020-11-02 10:13:47.556398495 +0000
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int counter;
+extern void foo (void);
+extern void xxx (void);
+
+void
+bar (void)
+{
+}
+
+int
+main(void)
+{
+ bar ();
+ foo ();
+ xxx ();
+ if (counter == 1)
+ printf ("PASS\n");
+ return 0;
+}
--- /dev/null 2020-11-02 08:23:19.196542384 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26267.err 2020-11-02 10:14:01.785310441 +0000
@@ -0,0 +1,3 @@
+#...
+.*: multiple definition of `bar'; .*
+#...
diff -rup binutils.orig/ld/testsuite/ld-plugin/pr26267.err binutils-2.30/ld/testsuite/ld-plugin/pr26267.err
--- binutils.orig/ld/testsuite/ld-plugin/pr26267.err 2020-11-02 12:51:28.751137533 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/pr26267.err 2020-11-02 13:01:38.430679516 +0000
@@ -1,3 +1,3 @@
#...
-.*: multiple definition of `bar'; .*
+.*: multiple definition of `bar'.*
#...
--- binutils.orig/ld/testsuite/ld-plugin/lto.exp 2020-11-02 12:51:28.751137533 +0000
+++ binutils-2.30/ld/testsuite/ld-plugin/lto.exp 2020-11-02 13:10:49.531708566 +0000
@@ -404,15 +404,13 @@ set lto_run_tests [list \
"-O2 -flto tmpdir/pr22502a.o tmpdir/pr22502b.o" "" \
{dummy.c} "pr20267" "pass.out" "-flto -O2" "c"] \
[list "Run pr26262a" \
- "-O2 -flto" "" \
+ "-O2 -flto tmpdir/pr26262b.o tmpdir/pr26262c.o" "" \
{pr26262a.c} "pr26262a" "pass.out" \
- "-flto -O2" "c" "" \
- "tmpdir/pr26262b.o tmpdir/pr26262c.o"] \
+ "-flto -O2" "c" "" ] \
[list "Run pr26262b" \
"-flto -O2 tmpdir/pr26262b.o tmpdir/pr26262c.o" "" \
{pr26262a.c} "pr26262b" "pass.out" \
- "-flto -O2" "c" "" \
- ""] \
+ "-flto -O2" "c" "" ] \
]
if { [at_least_gcc_version 4 7] } {
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