forked from mirrors/nixpkgs
138 lines
4 KiB
Diff
138 lines
4 KiB
Diff
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From 28a27bdbb9500797e6767f80c8128b09112aeed5 Mon Sep 17 00:00:00 2001
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From: "H.J. Lu" <hjl.tools@gmail.com>
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Date: Sat, 11 Aug 2018 06:41:33 -0700
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Subject: [PATCH] x86: Properly add X86_ISA_1_NEEDED property
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Existing properties may be removed during property merging. We avoid
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adding X86_ISA_1_NEEDED property only if existing properties won't be
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removed.
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bfd/
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PR ld/23428
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* elfxx-x86.c (_bfd_x86_elf_link_setup_gnu_properties): Don't
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add X86_ISA_1_NEEDED property only if existing properties won't
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be removed.
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ld/
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PR ld/23428
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* testsuite/ld-elf/dummy.s: New file.
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* testsuite/ld-elf/linux-x86.S: Add X86_FEATURE_1_AND property.
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* testsuite/ld-elf/linux-x86.exp: Add dummy.s to pr23428.
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(cherry picked from commit ab9e342807d132182892de1be1a92d6e91a5c1da)
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---
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bfd/elfxx-x86.c | 28 ++++++++++++++++++++++------
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ld/testsuite/ld-elf/dummy.s | 1 +
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ld/testsuite/ld-elf/linux-x86.S | 28 ++++++++++++++++++++++++++++
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ld/testsuite/ld-elf/linux-x86.exp | 2 +-
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6 files changed, 66 insertions(+), 7 deletions(-)
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create mode 100644 ld/testsuite/ld-elf/dummy.s
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diff --git a/bfd/elfxx-x86.c b/bfd/elfxx-x86.c
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index 7ccfd25815..2d8f7b640b 100644
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--- a/bfd/elfxx-x86.c
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+++ b/bfd/elfxx-x86.c
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@@ -2588,7 +2588,6 @@ _bfd_x86_elf_link_setup_gnu_properties
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prop->pr_kind = property_number;
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}
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else if (has_text
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- && elf_properties (ebfd) == NULL
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&& elf_tdata (info->output_bfd)->o->build_id.sec == NULL
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&& !htab->elf.dynamic_sections_created
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&& !info->traditional_format
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@@ -2598,11 +2597,28 @@ _bfd_x86_elf_link_setup_gnu_properties
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/* If the separate code program header is needed, make sure
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that the first read-only PT_LOAD segment has no code by
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adding a GNU_PROPERTY_X86_ISA_1_NEEDED note. */
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- prop = _bfd_elf_get_property (ebfd,
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- GNU_PROPERTY_X86_ISA_1_NEEDED,
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- 4);
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- prop->u.number = GNU_PROPERTY_X86_ISA_1_486;
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- prop->pr_kind = property_number;
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+ elf_property_list *list;
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+ bfd_boolean need_property = TRUE;
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+
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+ for (list = elf_properties (ebfd); list; list = list->next)
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+ switch (list->property.pr_type)
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+ {
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+ case GNU_PROPERTY_STACK_SIZE:
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+ case GNU_PROPERTY_NO_COPY_ON_PROTECTED:
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+ case GNU_PROPERTY_X86_ISA_1_NEEDED:
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+ /* These properties won't be removed during merging. */
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+ need_property = FALSE;
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+ break;
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+ }
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+
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+ if (need_property)
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+ {
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+ prop = _bfd_elf_get_property (ebfd,
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+ GNU_PROPERTY_X86_ISA_1_NEEDED,
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+ 4);
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+ prop->u.number = GNU_PROPERTY_X86_ISA_1_486;
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+ prop->pr_kind = property_number;
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+ }
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}
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/* Create the GNU property note section if needed. */
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diff --git a/ld/testsuite/ld-elf/dummy.s b/ld/testsuite/ld-elf/dummy.s
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new file mode 100644
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index 0000000000..403f98000d
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--- /dev/null
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+++ b/ld/testsuite/ld-elf/dummy.s
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@@ -0,0 +1 @@
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+# Dummy
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diff --git a/ld/testsuite/ld-elf/linux-x86.S b/ld/testsuite/ld-elf/linux-x86.S
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index bdf40c6e01..d94abc1106 100644
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--- a/ld/testsuite/ld-elf/linux-x86.S
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+++ b/ld/testsuite/ld-elf/linux-x86.S
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@@ -61,3 +61,31 @@ syscall:
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ret /* Return to caller. */
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.size syscall, .-syscall
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.section .note.GNU-stack,"",@progbits
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+
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+ .section ".note.gnu.property", "a"
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+#ifdef __LP64__
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+ .p2align 3
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+#else
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+ .p2align 2
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+#endif
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+ .long 1f - 0f /* name length */
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+ .long 5f - 2f /* data length */
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+ .long 5 /* note type */
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+0: .asciz "GNU" /* vendor name */
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+1:
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+#ifdef __LP64__
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+ .p2align 3
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+#else
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+ .p2align 2
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+#endif
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+2: .long 0xc0000002 /* pr_type. */
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+ .long 4f - 3f /* pr_datasz. */
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+3:
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+ .long 0x2
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+4:
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+#ifdef __LP64__
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+ .p2align 3
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+#else
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+ .p2align 2
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+#endif
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+5:
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diff --git a/ld/testsuite/ld-elf/linux-x86.exp b/ld/testsuite/ld-elf/linux-x86.exp
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index 36217c6fb4..f6f5a80853 100644
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--- a/ld/testsuite/ld-elf/linux-x86.exp
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+++ b/ld/testsuite/ld-elf/linux-x86.exp
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@@ -37,7 +37,7 @@ run_ld_link_exec_tests [list \
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"Run PR ld/23428 test" \
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"--no-dynamic-linker -z separate-code" \
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"" \
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- { linux-x86.S pr23428.c } \
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+ { linux-x86.S pr23428.c dummy.s } \
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"pr23428" \
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"pass.out" \
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"$NOPIE_CFLAGS -fno-asynchronous-unwind-tables" \
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--
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2.20.1
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