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68 lines
3.0 KiB
68 lines
3.0 KiB
2 weeks ago
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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Keith Seitz <keiths@redhat.com>
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Date: Mon, 16 Nov 2020 12:42:09 -0500
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Subject: gdb-rhbz1898252-loadable-section-outside-ELF-segments.patch
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;; Backport of "Exclude debuginfo files from 'outside of ELF segments'
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;; warning" (Keith Seitz)
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Exclude debuginfo files from "outside of ELF segments" warning
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When GDB loads an ELF file, it will warn when a section is not located
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in an ELF segment:
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$ ./gdb -q -iex "set build-id-verbose 0" --ex "b systemctl_main" -ex "r" -batch --args systemctl kexec
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Breakpoint 1 at 0xc24d: file ../src/systemctl/systemctl.c, line 8752.
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libgcc_s.so.1
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[Thread debugging using libthread_db enabled]
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Using host libthread_db library "/lib64/libthread_db.so.1".
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libcap.so.2
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libacl.so.1
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libcryptsetup.so.12
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libgcrypt.so.20
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warning: Loadable section ".note.gnu.property" outside of ELF segments
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in .gnu_debugdata for /lib64/libip4tc.so.2
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[snip]
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This has feature has also been reported by various users, most notably
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the Fedora-EOL'd bug 1553086.
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Mark Wielaard explains the issue quite nicely in
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https://sourceware.org/bugzilla/show_bug.cgi?id=24717#c2
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The short of it is, the ELF program headers for debuginfo files are
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not suited to this particular use case. Consequently, the warning
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generated above really is useless and should be ignored.
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This patch follows the same heuristic that BFD itself uses.
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gdb/ChangeLog
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2020-11-13 Keith Seitz <keiths@redhat.com>
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https://bugzilla.redhat.com/show_bug.cgi?id=1553086
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* elfread.c (elf_symfile_segments): Omit "Loadable section ...
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outside of ELF segments" warning for debugin
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diff --git a/gdb/elfread.c b/gdb/elfread.c
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--- a/gdb/elfread.c
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+++ b/gdb/elfread.c
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@@ -147,7 +147,12 @@ elf_symfile_segments (bfd *abfd)
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RealView) use SHT_NOBITS for uninitialized data. Since it is
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uninitialized, it doesn't need a program header. Such
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binaries are not relocatable. */
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- if (bfd_section_size (sect) > 0 && j == num_segments
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+
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+ /* Exclude debuginfo files from this warning, too, since those
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+ are often not strictly compliant with the standard. See, e.g.,
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+ ld/24717 for more discussion. */
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+ if (!is_debuginfo_file (abfd)
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+ && bfd_section_size (sect) > 0 && j == num_segments
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&& (bfd_section_flags (sect) & SEC_LOAD) != 0)
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warning (_("Loadable section \"%s\" outside of ELF segments"),
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bfd_section_name (sect));
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