1be8b22f48
When building iputils for powerpc with BR2_PIC_PIE enabled, the arping/rdisc/tftpd binaries will segfault at runtime. This can be traced back to a few bugs in patchelf corrupting the ELFs when resizing the RPATH to replace "$ORIGIN/" with "/usr/sbin". This patch pulls in upstream fixes to prevent the binaries from being needlessly inflated, prevent the startPage from always being adjusted, fix a few minor bugs, and fix incorrect endianness handling. Signed-off-by: Conrad Ratschan <conrad.ratschan@rockwellcollins.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
81 lines
3.0 KiB
Diff
81 lines
3.0 KiB
Diff
From c61c2960d782c67566790b210163ff9c799f018a Mon Sep 17 00:00:00 2001
|
|
From: Conrad Ratschan <ratschance@gmail.com>
|
|
Date: Sat, 3 Oct 2020 20:17:24 -0500
|
|
Subject: [PATCH] Fix endianness issues for powerpc PIE
|
|
|
|
Previously when running `patchelf --set-rpath "/usr/sbin" my_bin` on a
|
|
PIE ppc32 binary that had no RPATH a few issues were encountered.
|
|
|
|
This commit fixes:
|
|
|
|
1. The PT_PHDR being sorted improperly due to the type being read in
|
|
incorrect endianness
|
|
|
|
3. The interpreter being clobbered due to the replace sections routine
|
|
reading sh_offset and sh_size in incorrect endianness
|
|
|
|
4. The PHDR segment having an incorrect virt and phys address due to
|
|
reading the e_phoff in the incorrect endianness
|
|
|
|
This also fixes a read of the shdr.sh_type in writeReplacedSections but
|
|
this was not encountered during testing.
|
|
|
|
Fetch from: https://github.com/NixOS/patchelf/commit/884eccc4f061a3dbdbe63a4c73f1cc9bbf77fa7d
|
|
|
|
Backported to v0.9. Removed item 2 from the fix list as it is not
|
|
applicable to v0.9.
|
|
|
|
Signed-off-by: Conrad Ratschan <conrad.ratschan@rockwellcollins.com>
|
|
---
|
|
src/patchelf.cc | 12 ++++++------
|
|
1 file changed, 6 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/src/patchelf.cc b/src/patchelf.cc
|
|
index fa2945e..e60b17c 100644
|
|
--- a/src/patchelf.cc
|
|
+++ b/src/patchelf.cc
|
|
@@ -173,8 +173,8 @@ private:
|
|
ElfFile * elfFile;
|
|
bool operator ()(const Elf_Phdr & x, const Elf_Phdr & y)
|
|
{
|
|
- if (x.p_type == PT_PHDR) return true;
|
|
- if (y.p_type == PT_PHDR) return false;
|
|
+ if (elfFile->rdi(x.p_type) == PT_PHDR) return true;
|
|
+ if (elfFile->rdi(y.p_type) == PT_PHDR) return false;
|
|
return elfFile->rdi(x.p_paddr) < elfFile->rdi(y.p_paddr);
|
|
}
|
|
};
|
|
@@ -586,7 +586,7 @@ void ElfFile<ElfFileParamNames>::writeReplacedSections(Elf_Off & curOff,
|
|
{
|
|
string sectionName = i->first;
|
|
Elf_Shdr & shdr = findSection(sectionName);
|
|
- if (shdr.sh_type != SHT_NOBITS)
|
|
+ if (rdi(shdr.sh_type) != SHT_NOBITS)
|
|
memset(contents + rdi(shdr.sh_offset), 'X', rdi(shdr.sh_size));
|
|
}
|
|
|
|
@@ -667,9 +667,9 @@ void ElfFile<ElfFileParamNames>::rewriteSectionsLibrary()
|
|
/* Some sections may already be replaced so account for that */
|
|
unsigned int i = 1;
|
|
Elf_Addr pht_size = sizeof(Elf_Ehdr) + (phdrs.size() + 1)*sizeof(Elf_Phdr);
|
|
- while( shdrs[i].sh_offset <= pht_size && i < rdi(hdr->e_shnum) ) {
|
|
+ while( rdi(shdrs[i].sh_offset) <= pht_size && i < rdi(hdr->e_shnum) ) {
|
|
if (not haveReplacedSection(getSectionName(shdrs[i])))
|
|
- replaceSection(getSectionName(shdrs[i]), shdrs[i].sh_size);
|
|
+ replaceSection(getSectionName(shdrs[i]), rdi(shdrs[i].sh_size));
|
|
i++;
|
|
}
|
|
|
|
@@ -723,7 +723,7 @@ void ElfFile<ElfFileParamNames>::rewriteSectionsLibrary()
|
|
assert(curOff == startOffset + neededSpace);
|
|
|
|
/* Write out the updated program and section headers */
|
|
- rewriteHeaders(hdr->e_phoff);
|
|
+ rewriteHeaders(rdi(hdr->e_phoff));
|
|
}
|
|
|
|
|
|
--
|
|
2.17.1
|
|
|