Disable PLT elision for x86/x86_64.
Relates: #1452111 Relates: #1333481
This commit is contained in:
Nick Clifton
parent
c4cfb3f0ac
commit
76bffb9bda
304
binutils-2.29-revert-PLT-elision.patch
Normal file
304
binutils-2.29-revert-PLT-elision.patch
Normal file
@ -0,0 +1,304 @@
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diff -rup binutils.orig/bfd/elf32-i386.c binutils-2.29.1/bfd/elf32-i386.c
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--- binutils.orig/bfd/elf32-i386.c 2017-11-15 13:32:41.209042711 +0000
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+++ binutils-2.29.1/bfd/elf32-i386.c 2017-11-15 13:42:09.365205187 +0000
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@@ -2747,24 +2747,6 @@ elf_i386_allocate_dynrelocs (struct elf_
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if (h->type != STT_FUNC)
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eh->func_pointer_refcount = 0;
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- /* We can't use the GOT PLT if pointer equality is needed since
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- finish_dynamic_symbol won't clear symbol value and the dynamic
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- linker won't update the GOT slot. We will get into an infinite
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- loop at run-time. */
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- if (htab->plt_got != NULL
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- && h->type != STT_GNU_IFUNC
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- && !h->pointer_equality_needed
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- && h->plt.refcount > 0
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- && h->got.refcount > 0)
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- {
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- /* Don't use the regular PLT if there are both GOT and GOTPLT
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- reloctions. */
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- h->plt.offset = (bfd_vma) -1;
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-
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- /* Use the GOT PLT. */
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- eh->plt_got.refcount = 1;
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- }
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-
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/* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
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here if it is defined and referenced in a non-shared object. */
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if (h->type == STT_GNU_IFUNC
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diff -rup binutils.orig/bfd/elf64-x86-64.c binutils-2.29.1/bfd/elf64-x86-64.c
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--- binutils.orig/bfd/elf64-x86-64.c 2017-11-15 13:32:41.142043517 +0000
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+++ binutils-2.29.1/bfd/elf64-x86-64.c 2017-11-15 13:41:45.030498045 +0000
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@@ -3184,24 +3184,6 @@ elf_x86_64_allocate_dynrelocs (struct el
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eh->has_got_reloc,
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eh);
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- /* We can't use the GOT PLT if pointer equality is needed since
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- finish_dynamic_symbol won't clear symbol value and the dynamic
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- linker won't update the GOT slot. We will get into an infinite
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- loop at run-time. */
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- if (htab->plt_got != NULL
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- && h->type != STT_GNU_IFUNC
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- && !h->pointer_equality_needed
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- && h->plt.refcount > 0
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- && h->got.refcount > 0)
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- {
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- /* Don't use the regular PLT if there are both GOT and GOTPLT
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- reloctions. */
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- h->plt.offset = (bfd_vma) -1;
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-
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- /* Use the GOT PLT. */
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- eh->plt_got.refcount = 1;
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- }
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-
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/* Clear the reference count of function pointer relocations if
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symbol isn't a normal function. */
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if (h->type != STT_FUNC)
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diff -rup binutils.orig/ld/testsuite/ld-i386/pltgot-1.d binutils-2.29.1/ld/testsuite/ld-i386/pltgot-1.d
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--- binutils.orig/ld/testsuite/ld-i386/pltgot-1.d 2017-11-15 13:32:39.335065263 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-i386/pltgot-1.d 2017-11-15 15:03:55.649727195 +0000
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@@ -2,6 +2,7 @@
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#readelf: -S --wide
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#as: --32
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+#pass
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#...
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+\[ *[0-9]+\] \.plt +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+10 +.*
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#...
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diff -rup binutils.orig/ld/testsuite/ld-i386/pltgot-2.d binutils-2.29.1/ld/testsuite/ld-i386/pltgot-2.d
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--- binutils.orig/ld/testsuite/ld-i386/pltgot-2.d 2017-11-15 13:32:39.329065335 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-i386/pltgot-2.d 2017-11-15 15:04:20.803430034 +0000
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@@ -3,7 +3,6 @@
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#readelf: -d --wide
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#as: --32
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-#failif
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#...
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+0x[0-9a-f]+ +\(PLTREL.*
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#...
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diff -rup binutils.orig/ld/testsuite/ld-i386/pr19636-2d.d binutils-2.29.1/ld/testsuite/ld-i386/pr19636-2d.d
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--- binutils.orig/ld/testsuite/ld-i386/pr19636-2d.d 2017-11-15 13:32:39.336065251 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-i386/pr19636-2d.d 2017-11-15 15:03:00.413379749 +0000
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@@ -9,7 +9,7 @@ Relocation section '\.rel\.dyn' at offse
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[0-9a-f]+ +[0-9a-f]+ +R_386_32 +0+ +func
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[0-9a-f]+ +[0-9a-f]+ +R_386_PC32 +0+ +func
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[0-9a-f]+ +[0-9a-f]+ +R_386_GLOB_DAT +0+ +func
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-
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+#...
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Symbol table '\.dynsym' contains [0-9]+ entries:
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+Num: +Value +Size Type +Bind +Vis +Ndx Name
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#...
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diff -rup binutils.orig/ld/testsuite/ld-i386/pr19636-2e.d binutils-2.29.1/ld/testsuite/ld-i386/pr19636-2e.d
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--- binutils.orig/ld/testsuite/ld-i386/pr19636-2e.d 2017-11-15 13:32:39.330065323 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-i386/pr19636-2e.d 2017-11-15 15:03:28.928042882 +0000
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@@ -9,7 +9,7 @@ Relocation section '\.rel\.dyn' at offse
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[0-9a-f]+ +[0-9a-f]+ +R_386_32 +0+ +func
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[0-9a-f]+ +[0-9a-f]+ +R_386_PC32 +0+ +func
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[0-9a-f]+ +[0-9a-f]+ +R_386_GLOB_DAT +0+ +func
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-
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+#...
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Symbol table '\.dynsym' contains [0-9]+ entries:
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+Num: +Value +Size Type +Bind +Vis +Ndx Name
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#...
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diff -rup binutils.orig/ld/testsuite/ld-i386/pr20830.d binutils-2.29.1/ld/testsuite/ld-i386/pr20830.d
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--- binutils.orig/ld/testsuite/ld-i386/pr20830.d 2017-11-15 13:32:39.332065299 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-i386/pr20830.d 2017-11-15 15:04:43.205165384 +0000
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@@ -19,7 +19,7 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r8 \(eip\) at cfa-4
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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0+18 00000010 0000001c FDE cie=00000000 pc=00000188..00000193
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pltgot-1.d binutils-2.29.1/ld/testsuite/ld-x86-64/pltgot-1.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pltgot-1.d 2017-11-15 13:32:39.415064300 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pltgot-1.d 2017-11-15 15:08:39.333375801 +0000
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@@ -2,8 +2,4 @@
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#readelf: -S --wide
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#as: --64
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-#...
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- +\[ *[0-9]+\] \.plt +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+10 +.*
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-#...
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- +\[ *[0-9]+\] \.got\.plt +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+18 +.*
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#pass
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pltgot-2.d binutils-2.29.1/ld/testsuite/ld-x86-64/pltgot-2.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pltgot-2.d 2017-11-15 13:32:39.404064432 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pltgot-2.d 2017-11-15 15:08:59.031143095 +0000
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@@ -3,7 +3,6 @@
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#readelf: -d --wide
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#as: --64
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-#failif
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#...
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+0x[0-9a-f]+ +\(PLTREL.*
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#...
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/plt-main-bnd.dd binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main-bnd.dd
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--- binutils.orig/ld/testsuite/ld-x86-64/plt-main-bnd.dd 2017-11-15 13:32:39.405064420 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main-bnd.dd 2017-11-15 15:06:53.694623801 +0000
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@@ -1,7 +1,4 @@
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-#...
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-Disassembly of section .plt.got:
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-[a-f0-9]+ <[a-z]+@plt>:
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-[ ]*[a-f0-9]+: f2 ff 25 .. .. 20 00 bnd jmpq \*0x20....\(%rip\) # ...... <.*>
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+#...
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[ ]*[a-f0-9]+: 90 nop
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#pass
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/plt-main-ibt.dd binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main-ibt.dd
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--- binutils.orig/ld/testsuite/ld-x86-64/plt-main-ibt.dd 2017-11-15 13:32:39.412064336 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main-ibt.dd 2017-11-15 15:06:35.148842897 +0000
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@@ -1,7 +1,3 @@
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#...
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-Disassembly of section .plt.got:
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-
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-[a-f0-9]+ <[_a-z]+@plt>:
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[ ]*[a-f0-9]+: f3 0f 1e fa endbr64
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-[ ]*[a-f0-9]+: f2 ff 25 .. .. 20 00 bnd jmpq \*0x20....\(%rip\) # ...... <[_a-z]+>
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#pass
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/plt-main.rd binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main.rd
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--- binutils.orig/ld/testsuite/ld-x86-64/plt-main.rd 2017-11-15 13:32:39.407064397 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/plt-main.rd 2017-11-15 15:06:17.244054423 +0000
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@@ -1,4 +1,3 @@
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-#failif
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#...
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[0-9a-f ]+R_X86_64_JUMP_SLOT +0+ +bar \+ 0
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#...
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr20830a.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830a.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr20830a.d 2017-11-15 13:32:39.412064336 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830a.d 2017-11-15 15:15:09.918750288 +0000
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@@ -20,6 +20,7 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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+#pass
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000238..0000000000000244
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr20830a-now.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830a-now.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr20830a-now.d 2017-11-15 13:32:39.413064324 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830a-now.d 2017-11-15 15:16:08.227055104 +0000
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@@ -20,6 +20,7 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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+#pass
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000238..0000000000000244
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr20830b.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830b.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr20830b.d 2017-11-15 13:32:39.413064324 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830b.d 2017-11-15 15:16:20.115913358 +0000
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@@ -20,7 +20,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000010 0000001c FDE cie=00000000 pc=0000000000000188..0000000000000194
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr20830b-now.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830b-now.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr20830b-now.d 2017-11-15 13:32:39.411064348 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr20830b-now.d 2017-11-15 15:16:29.012807282 +0000
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@@ -20,7 +20,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000010 0000001c FDE cie=00000000 pc=0000000000000188..0000000000000194
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038a.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038a.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038a.d 2017-11-15 13:32:39.408064384 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038a.d 2017-11-15 15:19:48.097433680 +0000
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@@ -19,7 +19,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000238..0000000000000244
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038a-now.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038a-now.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038a-now.d 2017-11-15 13:32:39.401064469 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038a-now.d 2017-11-15 15:10:56.077760324 +0000
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@@ -20,7 +20,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000238..0000000000000244
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038b.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038b.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038b.d 2017-11-15 13:32:39.405064420 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038b.d 2017-11-15 15:10:42.828916844 +0000
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@@ -19,6 +19,7 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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+#pass
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000248..000000000000024d
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038b-now.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038b-now.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038b-now.d 2017-11-15 13:32:39.416064288 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038b-now.d 2017-11-15 15:11:11.550577531 +0000
|
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@@ -20,7 +20,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000248..000000000000024d
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038c.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038c.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038c.d 2017-11-15 13:32:39.411064348 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038c.d 2017-11-15 15:09:52.664509478 +0000
|
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@@ -19,7 +19,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000290..00000000000002a1
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/pr21038c-now.d binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038c-now.d
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--- binutils.orig/ld/testsuite/ld-x86-64/pr21038c-now.d 2017-11-15 13:32:39.413064324 +0000
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+++ binutils-2.29.1/ld/testsuite/ld-x86-64/pr21038c-now.d 2017-11-15 15:11:22.975442559 +0000
|
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@@ -20,7 +20,8 @@ Contents of the .eh_frame section:
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DW_CFA_offset: r16 \(rip\) at cfa-8
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DW_CFA_nop
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DW_CFA_nop
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-
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+#pass
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+
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0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000290..00000000000002a1
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DW_CFA_nop
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DW_CFA_nop
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diff -rup binutils.orig/ld/testsuite/ld-x86-64/tlspic2.rd binutils-2.29.1/ld/testsuite/ld-x86-64/tlspic2.rd
|
||||
--- binutils.orig/ld/testsuite/ld-x86-64/tlspic2.rd 2017-11-15 13:32:39.417064276 +0000
|
||||
+++ binutils-2.29.1/ld/testsuite/ld-x86-64/tlspic2.rd 2017-11-15 15:05:02.950932110 +0000
|
||||
@@ -14,6 +14,7 @@ Section Headers:
|
||||
+\[[ 0-9]+\] .dynsym +.*
|
||||
+\[[ 0-9]+\] .dynstr +.*
|
||||
+\[[ 0-9]+\] .rela.dyn +.*
|
||||
+#pass
|
||||
+\[[ 0-9]+\] .plt +.*
|
||||
+\[[ 0-9]+\] .plt.got +.*
|
||||
+\[[ 0-9]+\] .text +PROGBITS +0+1000 0+1000 0+31a 00 +AX +0 +0 4096
|
||||
@ -54,7 +54,7 @@
|
||||
Summary: A GNU collection of binary utilities
|
||||
Name: %{?cross}binutils%{?_with_debug:-debug}
|
||||
Version: 2.29.1
|
||||
Release: 4%{?dist}
|
||||
Release: 5%{?dist}
|
||||
License: GPLv3+
|
||||
Group: Development/Tools
|
||||
URL: http://sources.redhat.com/binutils
|
||||
@ -129,6 +129,14 @@ Patch08: binutils-2.29.1-gold-start-stop.patch
|
||||
# Lifetime: Fixed in 2.30.
|
||||
Patch09: binutils-2.29.1-readelf-use-dynamic.patch
|
||||
|
||||
# Purpose: Disable an x86/x86_64 optimization that moves functions from the
|
||||
# PLT into the GOTPLT for faster access. This optimization is
|
||||
# problematic for tools that want to intercept PLT entries, such
|
||||
# as ltrace and LD_AUDIT. See BZs 1452111 and 1333481.
|
||||
# Lifetime: Permanent. But it should not be.
|
||||
# FIXME: Replace with a configure time option.
|
||||
Patch10: binutils-2.29-revert-PLT-elision.patch
|
||||
|
||||
#----------------------------------------------------------------------------
|
||||
|
||||
Provides: bundled(libiberty)
|
||||
@ -260,6 +268,7 @@ using libelf instead of BFD.
|
||||
%patch07 -p1
|
||||
%patch08 -p1
|
||||
%patch09 -p1
|
||||
%patch10 -p1
|
||||
|
||||
# We cannot run autotools as there is an exact requirement of autoconf-2.59.
|
||||
|
||||
@ -659,6 +668,9 @@ exit 0
|
||||
|
||||
#----------------------------------------------------------------------------
|
||||
%changelog
|
||||
* Tue Nov 28 2017 Nick Clifton <nickc@redhat.com> 2.29.1-5
|
||||
- Disable PLT elision for x86/x86_64. (#1452111 and #1333481)
|
||||
|
||||
* Wed Nov 01 2017 Nick Clifton <nickc@redhat.com> 2.29.1-4
|
||||
- Have readelf suggest the use of --use-dynamic when there are dynamic relocs that could have been displayed. (#1507694)
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user