From: "H.J. Lu" <hjl.tools@gmail.com>
To: binutils@sourceware.org
Subject: [PATCH 0/7] ELF: Omit section header on ELF objects
Date: Mon, 9 Mar 2020 17:12:16 -0700 [thread overview]
Message-ID: <20200310001224.131714-1-hjl.tools@gmail.com> (raw)
Section header isn't mandatory on ELF executable nor shared library.
This patch adds a new linker option, -z nosectionheader, to omit ELF
section header when building an executable or shared library, an
objcopy and strip option, --remove-section-header, to remove ELF
section header from an executable or shared library.
When there is no section header in an executable or shared library, we
reconstruct dynamic symbol table from the PT_DYNAMIC segment, which
contains DT_HASH/DT_GNU_HASH/DT_MIPS_XHASH, DT_STRTAB, DT_SYMTAB,
DT_STRSZ and DT_SYMENT entries, to improve nm and objdump.
H.J. Lu (5):
bfd: Improve nm and objdump without section header
readelf: Compute dynamic symbol table size from hash table
binutils: Add --remove-section-header tests
ld: Add tests for -z nosectionheader and --remove-section-header
ld: Add -z nosectionheader test to bootstrap.exp
Kaylee Blake (2):
ELF: Omit section header in ELF objects
ld: Add a simple test for -z nosectionheader
bfd/bfd-in2.h | 8 +-
bfd/bfd.c | 8 +-
bfd/elf-bfd.h | 10 +
bfd/elf.c | 497 ++++++++++++++++++
bfd/elfcode.h | 83 ++-
bfd/elflink.c | 12 +
bfd/elfxx-target.h | 6 +-
binutils/NEWS | 3 +
binutils/doc/binutils.texi | 12 +
binutils/objcopy.c | 54 +-
binutils/readelf.c | 226 ++++----
binutils/testsuite/binutils-all/objcopy.exp | 13 +
.../testsuite/binutils-all/remove-header-1.d | 8 +
ld/NEWS | 3 +
ld/emultempl/elf.em | 4 +
ld/ld.h | 3 +
ld/ld.texi | 6 +
ld/ldlang.c | 4 +
ld/lexsup.c | 12 +
ld/testsuite/ld-bootstrap/bootstrap.exp | 10 +-
ld/testsuite/ld-elf/hash.d | 8 +-
ld/testsuite/ld-elf/no-section-header.exp | 374 +++++++++++++
ld/testsuite/ld-elf/nosectionheader.d | 12 +
ld/testsuite/ld-elf/pr13195.d | 2 +-
ld/testsuite/ld-elf/pr25617-1-no-sec-hdr.nd | 3 +
ld/testsuite/ld-elf/pr25617-1-no-sec-hdr.rd | 20 +
.../ld-elf/pr25617-1-static-no-sec-hdr.rd | 12 +
ld/testsuite/ld-elf/pr25617-1a-no-sec-hdr.nd | 3 +
ld/testsuite/ld-elf/pr25617-1a-no-sec-hdr.rd | 20 +
ld/testsuite/ld-elf/pr25617-1a-sec-hdr.rd | 19 +
ld/testsuite/ld-elf/pr25617-1a.c | 11 +
ld/testsuite/ld-elf/pr25617-1b.c | 15 +
ld/testsuite/ld-elf/start-noheader.rd | 11 +
.../ld-elf/start-shared-noheader-gnu.rd | 22 +
.../ld-elf/start-shared-noheader-sysv.rd | 22 +
ld/testsuite/ld-elf/start-shared-noheader.nd | 5 +
ld/testsuite/ld-elfvsb/hidden2.d | 2 +-
ld/testsuite/ld-mips-elf/hash2.d | 8 +-
38 files changed, 1406 insertions(+), 145 deletions(-)
create mode 100644 binutils/testsuite/binutils-all/remove-header-1.d
create mode 100644 ld/testsuite/ld-elf/no-section-header.exp
create mode 100644 ld/testsuite/ld-elf/nosectionheader.d
create mode 100644 ld/testsuite/ld-elf/pr25617-1-no-sec-hdr.nd
create mode 100644 ld/testsuite/ld-elf/pr25617-1-no-sec-hdr.rd
create mode 100644 ld/testsuite/ld-elf/pr25617-1-static-no-sec-hdr.rd
create mode 100644 ld/testsuite/ld-elf/pr25617-1a-no-sec-hdr.nd
create mode 100644 ld/testsuite/ld-elf/pr25617-1a-no-sec-hdr.rd
create mode 100644 ld/testsuite/ld-elf/pr25617-1a-sec-hdr.rd
create mode 100644 ld/testsuite/ld-elf/pr25617-1a.c
create mode 100644 ld/testsuite/ld-elf/pr25617-1b.c
create mode 100644 ld/testsuite/ld-elf/start-noheader.rd
create mode 100644 ld/testsuite/ld-elf/start-shared-noheader-gnu.rd
create mode 100644 ld/testsuite/ld-elf/start-shared-noheader-sysv.rd
create mode 100644 ld/testsuite/ld-elf/start-shared-noheader.nd
--
2.24.1
next reply other threads:[~2020-03-10 0:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 0:12 H.J. Lu [this message]
2020-03-10 0:12 ` [PATCH 1/7] ELF: Omit section header in " H.J. Lu
2020-03-10 0:12 ` [PATCH 1/7] ELF: Omit section header on " H.J. Lu
2020-03-20 7:11 ` Alan Modra
2020-03-10 0:12 ` [PATCH 2/7] bfd: Improve nm and objdump without section header H.J. Lu
2020-03-12 3:11 ` Fangrui Song
2020-03-10 0:12 ` [PATCH 3/7] readelf: Compute dynamic symbol table size from hash table H.J. Lu
2020-03-10 0:12 ` [PATCH 4/7] ld: Add a simple test for -z nosectionheader H.J. Lu
2020-03-10 0:12 ` [PATCH 5/7] binutils: Add --remove-section-header tests H.J. Lu
2020-03-10 0:12 ` [PATCH 6/7] ld: Add tests for -z nosectionheader and --remove-section-header H.J. Lu
2020-03-10 0:12 ` [PATCH 7/7] ld: Add -z nosectionheader test to bootstrap.exp H.J. Lu
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