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Treat relocs against s390x IFUNC symbols in note sections as relocs against the FUNC symbol instead.

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- Combined previous patches into one which covers all ifunc supporting architectures.
- Retire binutils-s390-ifunc-relocs-in-notes.patch
- Retire binutils-x86_64-ifunc-relocs-in-notes.patch
This commit is contained in:
Nick Clifton 2018-03-09 14:58:17 +00:00
parent 9810446b4f
commit 92298b1c04
4 changed files with 305 additions and 95 deletions
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296
binutils-ifunc-relocs-in-notes.patch Normal file
View File

@ -0,0 +1,296 @@
diff -rup binutils.orig/bfd/elf32-i386.c binutils-2.30/bfd/elf32-i386.c
--- binutils.orig/bfd/elf32-i386.c 2018-03-09 14:43:05.324208873 +0000
+++ binutils-2.30/bfd/elf32-i386.c 2018-03-09 14:43:23.158000456 +0000
@@ -2202,12 +2202,19 @@ elf_i386_relocate_section (bfd *output_b
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
if ((input_section->flags & SEC_DEBUGGING) != 0)
continue;
- abort ();
+ _bfd_error_handler (_("%B: error: relocation againt ifunc symbol in non-alloc section %A"),
+ input_bfd, input_section);
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
}
/* STT_GNU_IFUNC symbol must go through PLT. */
@@ -2421,6 +2428,7 @@ do_ifunc_pointer:
}
}
+ skip_ifunc:
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
diff -rup binutils.orig/bfd/elf32-s390.c binutils-2.30/bfd/elf32-s390.c
--- binutils.orig/bfd/elf32-s390.c 2018-03-09 14:43:05.325208861 +0000
+++ binutils-2.30/bfd/elf32-s390.c 2018-03-09 14:43:31.353904647 +0000
@@ -2601,6 +2601,9 @@ elf_s390_relocate_section (bfd *output_b
case R_390_8:
case R_390_16:
case R_390_32:
+ if ((input_section->flags & SEC_ALLOC) == 0)
+ break;
+
if (h != NULL
&& s390_is_ifunc_symbol_p (h)
&& h->def_regular)
@@ -2662,9 +2665,6 @@ elf_s390_relocate_section (bfd *output_b
}
}
- if ((input_section->flags & SEC_ALLOC) == 0)
- break;
-
if ((bfd_link_pic (info)
&& (h == NULL
|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
Only in binutils-2.30/bfd: elf32-s390.c.orig
diff -rup binutils.orig/bfd/elf64-s390.c binutils-2.30/bfd/elf64-s390.c
--- binutils.orig/bfd/elf64-s390.c 2018-03-09 14:43:05.341208674 +0000
+++ binutils-2.30/bfd/elf64-s390.c 2018-03-09 14:43:31.354904635 +0000
@@ -2559,6 +2559,9 @@ elf_s390_relocate_section (bfd *output_b
case R_390_32:
case R_390_64:
+ if ((input_section->flags & SEC_ALLOC) == 0)
+ break;
+
if (h != NULL
&& s390_is_ifunc_symbol_p (h)
&& h->def_regular)
@@ -2621,9 +2624,6 @@ elf_s390_relocate_section (bfd *output_b
}
}
- if ((input_section->flags & SEC_ALLOC) == 0)
- break;
-
if ((bfd_link_pic (info)
&& (h == NULL
|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
Only in binutils-2.30/bfd: elf64-s390.c.orig
diff -rup binutils.orig/bfd/elf64-x86-64.c binutils-2.30/bfd/elf64-x86-64.c
--- binutils.orig/bfd/elf64-x86-64.c 2018-03-09 14:43:05.344208639 +0000
+++ binutils-2.30/bfd/elf64-x86-64.c 2018-03-09 14:43:23.161000420 +0000
@@ -2499,12 +2499,19 @@ elf_x86_64_relocate_section (bfd *output
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
if ((input_section->flags & SEC_DEBUGGING) != 0)
continue;
- abort ();
+ _bfd_error_handler (_("%B: error: relocation againt ifunc symbol in non-alloc section %A"),
+ input_bfd, input_section);
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
}
switch (r_type)
@@ -2722,6 +2729,7 @@ do_ifunc_pointer:
}
}
+ skip_ifunc:
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
diff -rup binutils.orig/bfd/elfnn-aarch64.c binutils-2.30/bfd/elfnn-aarch64.c
--- binutils.orig/bfd/elfnn-aarch64.c 2018-03-09 14:43:05.337208721 +0000
+++ binutils-2.30/bfd/elfnn-aarch64.c 2018-03-09 14:43:31.355904624 +0000
@@ -4987,6 +4987,11 @@ elfNN_aarch64_final_link_relocate (reloc
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
+
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
@@ -5180,6 +5185,7 @@ bad_ifunc_reloc:
}
}
+ skip_ifunc:
resolved_to_zero = (h != NULL
&& UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
Only in binutils-2.30/bfd: elfnn-aarch64.c.orig
diff -rup binutils.orig/bfd/elfxx-sparc.c binutils-2.30/bfd/elfxx-sparc.c
--- binutils.orig/bfd/elfxx-sparc.c 2018-03-09 14:43:05.333208768 +0000
+++ binutils-2.30/bfd/elfxx-sparc.c 2018-03-09 14:43:31.355904624 +0000
@@ -3026,7 +3026,13 @@ _bfd_sparc_elf_relocate_section (bfd *ou
if ((input_section->flags & SEC_ALLOC) == 0
|| h->plt.offset == (bfd_vma) -1)
- abort ();
+ {
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
+ abort ();
+ }
plt_sec = htab->elf.splt;
if (! plt_sec)
@@ -3130,6 +3136,7 @@ _bfd_sparc_elf_relocate_section (bfd *ou
}
}
+ skip_ifunc:
eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
Only in binutils-2.30/bfd: elfxx-sparc.c.orig
diff -rup binutils.orig/ld/testsuite/ld-ifunc/ifunc.exp binutils-2.30/ld/testsuite/ld-ifunc/ifunc.exp
--- binutils.orig/ld/testsuite/ld-ifunc/ifunc.exp 2018-03-09 14:43:04.844214486 +0000
+++ binutils-2.30/ld/testsuite/ld-ifunc/ifunc.exp 2018-03-09 14:43:31.355904624 +0000
@@ -47,6 +47,9 @@ if ![check_shared_lib_support] {
return
}
+# This test does not need a compiler...
+run_dump_test "ifuncmod5"
+
# We need a working compiler. (Strictly speaking this is
# not true, we could use target specific assembler files).
if { [which $CC] == 0 } {
Only in binutils-2.30: testsuite
--- /dev/null 2018-03-09 07:59:09.608015200 +0000
+++ binutils-2.30/ld/testsuite/ld-ifunc/ifuncmod5.s 2018-03-09 14:45:45.698334500 +0000
@@ -0,0 +1,105 @@
+ .file "ifuncmod5.c"
+
+ .text
+ .type ifuncmod5.c, STT_NOTYPE
+ifuncmod5.c:
+ .size ifuncmod5.c, 0
+
+ .pushsection .gnu.build.attributes, "", %note
+ .balign 4
+ .dc.l 8
+ .dc.l 16
+ .dc.l 0x100
+ .asciz "GA$3p4"
+ .dc.a ifuncmod5.c
+ .dc.a ifuncmod5.c_end
+ .popsection
+
+.Ltext0:
+#APP
+ .protected global
+ .type foo, %gnu_indirect_function
+ .type foo_hidden, %gnu_indirect_function
+ .type foo_protected, %gnu_indirect_function
+ .hidden foo_hidden
+ .protected foo_protected
+#NO_APP
+ .align 8
+ .type one, %function
+one:
+ .dc.l 0
+ .size one, .-one
+ .align 8
+
+.globl foo
+ .type foo, %function
+foo:
+ .dc.l 0
+ .size foo, .-foo
+
+ .pushsection .gnu.build.attributes
+ .dc.l 6
+ .dc.l 16
+ .dc.l 0x101
+ .dc.b 0x47, 0x41, 0x2a, 0x2, 0, 0
+ .dc.b 0, 0
+ .dc.a foo
+ .dc.a foo_end
+ .popsection
+
+foo_end:
+ .align 8
+.globl foo_hidden
+ .type foo_hidden, %function
+foo_hidden:
+ .dc.l 0
+ .size foo_hidden, .-foo_hidden
+
+ .pushsection .gnu.build.attributes
+ .dc.l 6
+ .dc.l 16
+ .dc.l 0x101
+ .dc.b 0x47, 0x41, 0x2a, 0x2, 0, 0
+ .dc.b 0, 0
+ .dc.a foo_hidden
+ .dc.a foo_hidden_end
+ .popsection
+
+foo_hidden_end:
+ .align 8
+
+ .globl foo_protected
+ .type foo_protected, %function
+foo_protected:
+ .dc.l 0
+
+ .size foo_protected, .-foo_protected
+
+ .pushsection .gnu.build.attributes
+ .dc.l 6
+ .dc.l 16
+ .dc.l 0x101
+ .dc.b 0x47, 0x41, 0x2a, 0x2, 0, 0
+ .dc.b 0, 0
+ .dc.a foo_protected
+ .dc.a foo_protected_end
+ .popsection
+
+foo_protected_end:
+ .globl global
+
+ .data
+ .align 4
+ .type global, %object
+ .size global, 4
+global:
+ .long -1
+
+ .text
+ .Letext0:
+
+ifuncmod5.c_end:
+ .type ifuncmod5.c_end, STT_NOTYPE
+ .size ifuncmod5.c_end, 0
+
+
--- /dev/null 2018-03-09 07:59:09.608015200 +0000
+++ binutils-2.30/ld/testsuite/ld-ifunc/ifuncmod5.d 2018-03-09 14:45:45.698334500 +0000
@@ -0,0 +1,8 @@
+# name: Reloc against IFUNC symbol in NOTE section
+# ld: -shared
+# nm: -p
+
+# We do not actually care about the notes at the moment.
+# The purpose of this test is to make sure that the link completes successfully.
+#pass
+

22
binutils-s390-ifunc-relocs-in-notes.patch
View File

@ -1,22 +0,0 @@
--- binutils.orig/bfd/elf64-s390.c 2018-03-09 11:49:19.535561642 +0000
+++ binutils-2.30/bfd/elf64-s390.c 2018-03-09 11:50:09.875967304 +0000
@@ -2559,6 +2559,9 @@ elf_s390_relocate_section (bfd *output_b
case R_390_32:
case R_390_64:
+ if ((input_section->flags & SEC_ALLOC) == 0)
+ break;
+
if (h != NULL
&& s390_is_ifunc_symbol_p (h)
&& h->def_regular)
@@ -2621,9 +2624,6 @@ elf_s390_relocate_section (bfd *output_b
}
}
- if ((input_section->flags & SEC_ALLOC) == 0)
- break;
-
if ((bfd_link_pic (info)
&& (h == NULL
|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT

64
binutils-x86_64-ifunc-relocs-in-notes.patch
View File

@ -1,64 +0,0 @@
diff -rup binutils.orig/bfd/elf32-i386.c binutils-2.30/bfd/elf32-i386.c
--- binutils.orig/bfd/elf32-i386.c 2018-03-07 14:17:57.645689834 +0000
+++ binutils-2.30/bfd/elf32-i386.c 2018-03-07 14:22:39.987385632 +0000
@@ -2202,12 +2202,19 @@ elf_i386_relocate_section (bfd *output_b
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
if ((input_section->flags & SEC_DEBUGGING) != 0)
continue;
- abort ();
+ _bfd_error_handler (_("%B: error: relocation againt ifunc symbol in non-alloc section %A"),
+ input_bfd, input_section);
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
}
/* STT_GNU_IFUNC symbol must go through PLT. */
@@ -2421,6 +2428,7 @@ do_ifunc_pointer:
}
}
+ skip_ifunc:
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
diff -rup binutils.orig/bfd/elf64-x86-64.c binutils-2.30/bfd/elf64-x86-64.c
--- binutils.orig/bfd/elf64-x86-64.c 2018-03-07 14:17:57.691689296 +0000
+++ binutils-2.30/bfd/elf64-x86-64.c 2018-03-07 14:22:33.907456784 +0000
@@ -2499,12 +2499,19 @@ elf_x86_64_relocate_section (bfd *output
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
if ((input_section->flags & SEC_DEBUGGING) != 0)
continue;
- abort ();
+ _bfd_error_handler (_("%B: error: relocation againt ifunc symbol in non-alloc section %A"),
+ input_bfd, input_section);
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
}
switch (r_type)
@@ -2722,6 +2729,7 @@ do_ifunc_pointer:
}
}
+ skip_ifunc:
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));

18
binutils.spec
View File

@ -62,7 +62,7 @@
Summary: A GNU collection of binary utilities
Name: %{?cross}binutils%{?_with_debug:-debug}
Version: 2.30
Release: 11%{?dist}
Release: 12%{?dist}
License: GPLv3+
Group: Development/Tools
URL: https://sourceware.org/binutils
@ -180,14 +180,9 @@ Patch15: binutils-speed-up-objdump.patch
Patch16: binutils-2.28-ignore-gold-duplicates.patch
# Purpose: Treat relosc against STT_GNU_IFUNC symbols in note sections as
# if they were relocs against STT_FUNC symbols instead. (x86 version)
# if they were relocs against STT_FUNC symbols instead.
# Lifetime: Fixed in 2.31.
Patch17: binutils-x86_64-ifunc-relocs-in-notes.patch
# Purpose: Treat relosc against STT_GNU_IFUNC symbols in note sections as
# if they were relocs against STT_FUNC symbols instead. (s390 version)
# Lifetime: Fixed in 2.31.
Patch18: binutils-s390-ifunc-relocs-in-notes.patch
Patch17: binutils-ifunc-relocs-in-notes.patch
#----------------------------------------------------------------------------
@ -331,7 +326,6 @@ using libelf instead of BFD.
%patch15 -p1
%patch16 -p1
%patch17 -p1
%patch18 -p1
# We cannot run autotools as there is an exact requirement of autoconf-2.59.
@ -740,6 +734,12 @@ exit 0
#----------------------------------------------------------------------------
%changelog
* Fri Mar 09 2018 Nick Clifton <nickc@redhat.com> 2.30-12
- Treat relocs against s390x IFUNC symbols in note sections as relocs against the FUNC symbol instead.
- Combined previous patches into one which covers all ifunc supporting architectures.
- Retire binutils-s390-ifunc-relocs-in-notes.patch
- Retire binutils-x86_64-ifunc-relocs-in-notes.patch
* Fri Mar 09 2018 Nick Clifton <nickc@redhat.com> 2.30-11
- Treat relocs against s390x IFUNC symbols in note sections as relocs against the FUNC symbol instead. (#1553705)