package/elf2flt: remove broken patch

Remove broken elf2flt patch:
package/elf2flt/0003-elf2flt-fix-.eh_frame-section-handling.patch

The patch modifies main(), but does not perform a similar change in
output_relocs(), which might cause sectionp in output_relocs() to be
initialized with an invalid address, causing random memory to be
overwritten.

This leads to a segfault when linking e.g. busybox for m68k.

We cannot perform a similar change in output_relocs(), since at this
point in time, data_len will always be non-zero.

Revert this patch completely, so that we can add a working patch.

Note that even with this patch reverted, elf2flt is still broken
on archs like m68k and xtensa, resulting in the fatal error:
ERROR: text=0x3bab8 overlaps data=0x33f60 ?

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/elf2flt/0003-elf2flt-fix-.eh_frame-section-handling.patch

@@ -1,73 +0,0 @@
-From 8b7fdb1dedfb8a6e858b46e5af33029fe0462ab8 Mon Sep 17 00:00:00 2001
-From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
-Date: Tue, 10 May 2022 23:14:36 +0900
-Subject: [PATCH] elf2flt: fix .eh_frame section handling
-
-elf2flt.ld linker script positions the .eh_frame section in an output
-section after the .text and .data output sections.
-
-However, when elf2flt.c is supplied the ELF linked using the elf2flt.ld
-linker script, it only looks at the flags for each input section, and
-then puts it in either a bFLT text, data or bss output section.
-
-Commit ba379d08bb7 ("elf2flt: fix for segfault on some ARM ELFs")
-modified the section scanning loop of elf2flt main() function to put
-read-only relocation data sections in the bFLT text output section so
-that the .ARM.exidx section is placed in the .text flat output section.
-Previously a read-only relocation data section would be put in the data
-output section.
-
-On ARM, the .eh_frame section does not have the SEC_RELOC flag set, so
-it will still end up in the data output section. However, on
-architectures that generates the .eh_frame section with the SEC_RELOC
-flag set, this section will now be placed in the text output section.
-
-The logic in elf2flt will handle all sections in order, and since the
-input order is .text, .data, and .eh_frame, putting .eh_frame in text
-output section does not work, since elf2flt.c has already put the .data
-input section in the bFLT data output section. This leads to the
-following print (example for riscv64 architecture):
-
-buildroot/output/host/riscv64-buildroot-linux-uclibc/bin/elf2flt:
-ERROR: text=0x3bab8 overlaps data=0x33f60 ?
-
-The way that elf2flt is written, we cannot append to the text output
-section after an input section has been added to the data output
-section. It might be possible to change this, but that would require
-moving all the code the was already placed in the data output section.
-
-Instead, let's allow putting a read-only relocation data section in the
-text output section (so that .ARM.exidx will still be placed correctly),
-but only if there has not yet been anything placed in the data output
-section.
-
-That way .ARM.exidx will still be placed correctly, and .eh_frame will
-be placed correctly in the .data output section, regardless if it has
-flag SEC_RELOC set or not.
-
-Fixes: ba379d08bb7 ("elf2flt: fix for segfault on some ARM ELFs")
-Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
-Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
----
- elf2flt.c | 5 +++--
- 1 file changed, 3 insertions(+), 2 deletions(-)
-
-diff --git a/elf2flt.c b/elf2flt.c
-index 7ac0617..da25e93 100644
---- a/elf2flt.c
-+++ b/elf2flt.c
-@@ -1877,8 +1877,9 @@ int main(int argc, char *argv[])
-     bfd_vma sec_vma;
- 
-     if ((s->flags & SEC_CODE) ||
--       ((s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) ==
--                    (SEC_DATA | SEC_READONLY | SEC_RELOC))) {
-+        (((s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) ==
-+                     (SEC_DATA | SEC_READONLY | SEC_RELOC)) &&
-+          !data_len)) {
-       vma = &text_vma;
-       len = &text_len;
-     } else if (s->flags & SEC_DATA) {
--- 
-2.35.1
-