* Force code to be at known dest of 4096
* Move _start into .text
* Load the _start symbol address and then minus 4096 to get the load
address
Signed-off-by: Callum Farmer <gmbr3@opensuse.org>
This was hopefully just a typo that has been cargo-culted around the codebase.
It certainly confuses the Red Hat license checker and makes the code copyright
clear.
- Make it actually work
- Split text/data/reloc/rodata sections
- Move hash sections to past end of image
(un-needed in PE)
- Correct section & file alignment
- Correct image size
- rename .reloc to .areloc within ELF
as only on ARM32 does this name cause
it to be marked as REL and subsequently
mistakenly added to RELSZ
Builds correctly & tested working in QEMU
Signed-off-by: Callum Farmer <gmbr3@opensuse.org>
This makes setup and teardown functions defined with
__attribute__((__constructor__) and __attribute__((__destructor__)) work
in normal circumstances in EFI binaries.
A couple of notes:
- it implements both the old-style .ctors/.dtors methods and the newer
style .init_array/.fini_array ELF constructor and destructor arrays,
processed in the order:
.init_array[]
.ctors[]
efi_main()
.dtors[]
.fini_array[]
- Destructors will only be called if efi_main() exits using "return";
any call to Exit() will still longjmp() past them.
- InitializeLib() has already been called before constructors run, so
they don't need to call it (and neither does anything else.) For
compatibility, it has been altered so calling it more than once is
safe.
- No attempt is made to handle any constructor or destructor with a
prototype other than "void func(void);", but note that InitializeLib
has been called, so LibImageHandle, ST, BS, and RT are set.
- The init_array/ctor/dtor/fini_array lists aren't the using the GNU
"CONSTRUCTOR" output section command, so they don't start with a size.
- The lists are individually sorted during the link stage via
SORT_BY_NAME() in the linker script.
- The default (empty) init_array/ctor/dtor/fini_array lists are padded
out to 8-byte alignment with ".p2align 3, 0", and each list always has
at least one ".long 0" at the end of it (even if it's completely
empty). As a result, they can have NULLs that need to be skipped.
The sections they're in are mergeable, so the NULLs don't have to be
exclusively at the end.
- The ia64 and mips64el arches have not been tested.
Signed-off-by: Peter Jones <pjones@redhat.com>
Acoording to what the spec says about the number of sybols [1]:
"This value should be zero for an image because COFF debugging
information is deprecated."
Changing as if not zero it causes problems to llvm-objcopy. This
affects only the architectures where COFF is not supported by objcopy
and where we build the PE header via assembly code.
[1] https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
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>
