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To: binutils@sourceware.org
Cc: Kaylee Blake <klkblake@gmail.com>, Alan Modra <amodra@gmail.com>,
Andreas Schwab <schwab@linux-m68k.org>
Subject: [PATCH v2 0/7] ELF: Strip section header in ELF objects
Date: Wed, 31 May 2023 13:06:10 -0700
Message-Id: <20230531200617.951996-1-hjl.tools@gmail.com>
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From: "H.J. Lu via Binutils" <binutils@sourceware.org>
Reply-To: "H.J. Lu" <hjl.tools@gmail.com>
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| Series |
ELF: Strip section header in ELF objects
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Message
H.J. Lu
May 31, 2023, 8:06 p.m. UTC
Changes in v2: 1. Rename the objcopy and strip option to --strip-section-headers. 2. Also strip non-alloc sections. Section header isn't mandatory on ELF executable nor shared library. This patch set adds a new linker option, -z nosectionheader, to omit ELF section header, a new objcopy and strip option, --strip-section-headers, to remove ELF section header. H.J. Lu (5): ELF: Discard non-alloc sections without section header bfd: Improve nm and objdump without section header binutils: Add a --strip-section-headers test ld: Add tests for -z nosectionheader and --strip-section-headers ld: Add -z nosectionheader test to bootstrap.exp Kaylee Blake (2): ELF: Strip section header in ELF objects ld: Add a simple test for -z nosectionheader bfd/bfd-in2.h | 6 +- bfd/bfd.c | 6 +- bfd/elf-bfd.h | 15 + bfd/elf.c | 755 ++++++++++++++++-- bfd/elfcode.h | 91 ++- bfd/elflink.c | 12 + bfd/elfxx-target.h | 4 +- binutils/NEWS | 5 +- binutils/doc/binutils.texi | 10 + binutils/objcopy.c | 38 +- binutils/testsuite/binutils-all/objcopy.exp | 5 + .../binutils-all/strip-section-headers-1.d | 5 + ld/NEWS | 3 + ld/emultempl/elf.em | 4 + ld/ld.h | 3 + ld/ld.texi | 5 + ld/ldlang.c | 8 + ld/lexsup.c | 8 + ld/testsuite/ld-bootstrap/bootstrap.exp | 10 +- ld/testsuite/ld-elf/hash-2.d | 11 + ld/testsuite/ld-elf/no-section-header.exp | 370 +++++++++ ld/testsuite/ld-elf/nosectionheader.d | 12 + 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 + 34 files changed, 1462 insertions(+), 87 deletions(-) create mode 100644 binutils/testsuite/binutils-all/strip-section-headers-1.d create mode 100644 ld/testsuite/ld-elf/hash-2.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
Comments
On Wed, May 31, 2023 at 01:06:10PM -0700, H.J. Lu wrote:
> Changes in v2:
I started reviewing this patchset, but stopped after seeing the
following results. Even if these fails are all just testsuite issues
they indicate you haven't tested on much other than x86_64-linux.
arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
d30v-elf +FAIL: ld-elf/nosectionheader
dlx-elf +FAIL: ld-elf/nosectionheader
fr30-elf +FAIL: ld-elf/nosectionheader
frv-elf +FAIL: ld-elf/nosectionheader
frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
ft32-elf +FAIL: ld-elf/nosectionheader
h8300-linux-gnu +FAIL: ld-elf/hash-2
hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
iq2000-elf +FAIL: ld-elf/nosectionheader
lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
mn10200-elf +FAIL: ld-elf/nosectionheader
msp430-elf +FAIL: ld-elf/nosectionheader
mt-elf +FAIL: ld-elf/nosectionheader
nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start)
nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start)
nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start)
nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start)
nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start)
nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start)
pj-elf +FAIL: ld-elf/nosectionheader
riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both (start)
riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu (start)
riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv (start)
riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both (start)
riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu (start)
riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv (start)
s12z-elf +FAIL: ld-elf/nosectionheader
xgate-elf +FAIL: ld-elf/nosectionheader
On Thu, Jun 1, 2023 at 4:49 PM Alan Modra <amodra@gmail.com> wrote: > > On Wed, May 31, 2023 at 01:06:10PM -0700, H.J. Lu wrote: > > Changes in v2: > > I started reviewing this patchset, but stopped after seeing the > following results. Even if these fails are all just testsuite issues > they indicate you haven't tested on much other than x86_64-linux. > > arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > arc-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > arc-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > bfin-linux-uclibc +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > bfin-linux-uclibc +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > csky-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > csky-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) Fixed in v3 to allow extra symbols. > d30v-elf +FAIL: ld-elf/nosectionheader > dlx-elf +FAIL: ld-elf/nosectionheader > fr30-elf +FAIL: ld-elf/nosectionheader > frv-elf +FAIL: ld-elf/nosectionheader Fixed in v3 to exclude the generic ELF targets. > frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > frv-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > frv-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > ft32-elf +FAIL: ld-elf/nosectionheader > h8300-linux-gnu +FAIL: ld-elf/hash-2 Fixed in v3 to require shared library support. > hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > hppa-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > hppa-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > iq2000-elf +FAIL: ld-elf/nosectionheader > lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > lm32-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > lm32-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > mn10200-elf +FAIL: ld-elf/nosectionheader > msp430-elf +FAIL: ld-elf/nosectionheader > mt-elf +FAIL: ld-elf/nosectionheader > nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both -shared (start) > nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu -shared (start) > nds32le-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv -shared (start) > nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both -shared (start) > nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu -shared (start) > nds32le-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv -shared (start) > pj-elf +FAIL: ld-elf/nosectionheader > riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=both (start) > riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=gnu (start) > riscv64-linux-gnu +FAIL: objcopy --strip-section-headers --hash-style=sysv (start) > riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=both (start) > riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=gnu (start) > riscv64-linux-gnu +FAIL: strip --strip-section-headers --hash-style=sysv (start) > s12z-elf +FAIL: ld-elf/nosectionheader > xgate-elf +FAIL: ld-elf/nosectionheader > > Will submit the v3 patch set. Thanks.