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63 lines
2.4 KiB
63 lines
2.4 KiB
2 years 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, 27 Jul 2020 17:32:50 -0400
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Subject: gdb-rhbz1842691-corefile-mem-access-6of15.patch
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;; Update binary_get_section_contents to seek using section's file position
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;; Kevin Buettner, RH BZ 1842961
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Author: Kevin Buettner <kevinb@redhat.com>
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Date: Thu Jun 11 18:58:49 2020 -0700
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Update binary_get_section_contents to seek using section's file position
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I have a patch for GDB which opens and reads from BFDs using the
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"binary" target. However, for it to work, we need to be able to get a
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section's contents based from the file position of that section.
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At the moment, reading a section's contents will always read from the
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start of the file regardless of where that section is located. While
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this was fine for the original use of the "binary" target, it won't
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work for my use case. This change shouldn't impact any existing
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callers due to the fact that the single .data section is initialized
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with a filepos of 0.
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bfd/ChangeLog:
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* binary.c (binary_get_section_contents): Seek using offset
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from section's file position.
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diff --git a/bfd/binary.c b/bfd/binary.c
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--- a/bfd/binary.c
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+++ b/bfd/binary.c
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@@ -19,10 +19,10 @@
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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-/* This is a BFD backend which may be used to write binary objects.
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- It may only be used for output, not input. The intention is that
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- this may be used as an output format for objcopy in order to
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- generate raw binary data.
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+/* This is a BFD backend which may be used to read or write binary
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+ objects. Historically, it was used as an output format for objcopy
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+ in order to generate raw binary data, but is now used for other
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+ purposes as well.
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This is very simple. The only complication is that the real data
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will start at some address X, and in some cases we will not want to
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@@ -97,12 +97,12 @@ binary_object_p (bfd *abfd)
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static bfd_boolean
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binary_get_section_contents (bfd *abfd,
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- asection *section ATTRIBUTE_UNUSED,
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+ asection *section,
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void * location,
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file_ptr offset,
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bfd_size_type count)
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{
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- if (bfd_seek (abfd, offset, SEEK_SET) != 0
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+ if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
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|| bfd_bread (location, count, abfd) != count)
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return FALSE;
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return TRUE;
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