As per the PE format specification, relocation blocks must be aligned on 32-bit boundaries. Fix the dummy relocations to obey the alignment constraints.
because of a "make" builtin rule. This breaks make -r, and it is an
inefficient way to build, at least for multiple files.
I have made a git tree which includes a patch for this problem,
and also forces -r by adding it to MAKEFLAGS:
git://git.zytor.com/users/hpa/gnu-efi.git make-r-fixes
Signed-off-by: H. Peter Anvin <hpa@users.sourceforge.net>
Signed-off-by: Nigel Croxon <ncroxon@redhat.com>
Gentoo has slightly modified linker defaults: --hash-style=gnu
This means all ELF files in system have '.gnu.hash' section
but no '.hash' section.
gnuefi's ldscript did not account for it and as a result
one symbol 'ImageBase' did not resolve locally for elilo.so
and caused 'elilo' to fail to load by ia64 EFI:
Loading.: Gentoo (try new elilo)
ImageAddress: pointer is outside of image
ImageAddress: pointer is outside of image
Those two relocations come from crt0-efi-ia64.S PE32 entry point
fdescr:
```
#define IMAGE_REL_BASED_DIR64<->10
.section .reloc, "a"
data4 _start_plabel // Page RVA
data4 12 // Block Size (2*4+2*2)
data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point
data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer
```
These refer ImageBase.
The change adds '.gnu.hash' collection (follows existing '.hash'
collection).
Tested on IA-64 by successfully booting elilo-3.16.
Bug: https://bugs.gentoo.org/575300
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
specific __attribute__((__unused__)), which breaks MSVC compilation...
I'll use this as a reminder that gnu-efi is compiled with more than
GNU toolchains, and that contributors might want to be careful about
adding GNU-specific extensions...
This patch does the following:
Create a new eficompiler.h header that sets all compiler-specific
options and extensions
Create a new EFI_UNUSED macro to be used in lieu of
__attribute__((__unused__)) and applies it to the relevant sources
Move the ALIGN(x) macro, previously defined in efisetjmp.h to the new header
Oh, and it also fixes a bunch of trailing whitespaces (because my code
editor is set to do just that by default).
Signed-off-by: Pete Batard <pbatard@users.sf.net>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>
decide to stick stuff we don't explicitly mention at 0,
no matter what else has already explicitly been located there.
A debian/ubuntu builder noted:
gcc -O0 -g3 -fpic -Wall -fshort-wchar -fno-strict-aliasing \
-fno-merge-constants -ffreestanding -fno-stack-protector \
-fno-stack-check --std=c11 -DCONFIG_aarch64 -D__KERNEL__ \
-I/usr/include/efi/ -I/usr/include/efi/aarch64/ \
-iquote/«PKGBUILDDIR»/include "-DDEBUGDIR=L\"/\"" \
-ffreestanding -I/usr/lib/gcc/aarch64-linux-gnu/4.9/include \
-c -o fakeesrt2.o fakeesrt2.c
ld -nostdlib --warn-common --no-undefined --fatal-warnings -shared \
-Bsymbolic -L/usr/lib -L/usr/lib --build-id=sha1 \
/usr/lib/crt0-efi-aarch64.o --defsym=EFI_SUBSYSTEM=0xa \
-o fakeesrt2.so fakeesrt2.o -lefi -lgnuefi \
/usr/lib/gcc/aarch64-linux-gnu/4.9/libgcc.a \
-T elf_aarch64_efi.lds
ld: section .note.gnu.build-id loaded at [00000000,00000023] overlaps section .text loaded at [00000000,0000668f]
This shouldn't be a problem if we explicitly tell it where to put them.
Ard added a patch to do this on Arm and aarch64 targets in 16409cad4cb,
but it needs to be everywhere.
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>
On arm, the linker script is missing section collection for data and
bss. This causes some symbols (notably static array symbols) not to
get relocated correctly and the resulting efi binary to crash. Fix
this by correctly collecting all the data and bss sections.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>
Subject: [PATCH] Add ARM .note.gnu.build-id input section to
a dedicated output section
This fixes the builds for ARM and AARCH64, which currently fail at link
time with an error like this:
arm-linux-gnueabi-ld: section .note.gnu.build-id loaded at
[0000000000000000,0000000000000023] overlaps section .text loaded at
[0000000000000000,00000000000064cf]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>
Subject: [PATCH 1/2] Relicense ARM and AARCH64 source files as
both BSD and GPL
This updates the licenses of the files authored by me under lib/arm
and lib/aarch64 to be both 2-clause BSD and GPL v2+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Nigel Croxon <nigel.croxon@hpe.com>
all of our linker scripts:
_text
_etext
_text_size
_data
_edata
_data_size
There are various things that are slightly different (positions of
.rela*, .dynamic, and similar in relation to .data), but _text and _data
are now always at the beginning of their respective sections with regard
to how a debuger would reference the debug info, and _etext and _edata
are now always extant and guaranteed to be after any of the respective
kind of data the debugger would look for in that section.
This also adds an application example of how it might be used, and a
makefile target for %.efi.debug which will generate a separate debuginfo
file for that example.
This also enables debugging by default (i.e. -g is in CFLAGS) and adds
.note.gnu.build-id sections to our .so files (i.e. --build-id=sha1 is in
LDFLAGS).
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Nigel Croxon <nigel.croxon@hp.com>
This patch enables building gnu-efi outside of the source tree.
That in turn enables building for multiple architectures in parallel.
The build directory is controlled by the OBJDIR make variable. It
defaults to the value of ARCH, and can be overridden from the command
line.
This patch also cleans up some doubled slashes between INSTALLROOT
and PREFIX.
Signed-off-by: Jonathan Boeing <jonathan.n.boeing@gmail.com>
Signed-off-by: Nigel Croxon <nigel.croxon@hp.com>
