Mark _start as function

Currently marked as NOTYPE

Signed-off-by: Callum Farmer <gmbr3@opensuse.org>

Merge /u/gmbr3/gnu-efi/ branch ia32 into master

https://sourceforge.net/p/gnu-efi/code/merge-requests/53/

Avoid processor dependent sizes in assembly

.word -> .2byte
.short -> .2byte
.long -> .4byte
.quad -> .8byte

Reference: https://github.com/rhboot/gnu-efi/commit/b83f0845b556506265d25d6a839a23c77b03

Avoid processor dependent sizes in assembly

.word -> .2byte
.short -> .2byte
.long -> .4byte
.quad -> .8byte

Reference: https://github.com/rhboot/gnu-efi/commit/b83f0845b556506265d25d6a839a23c77b037ae4
Fixes: https://sourceforge.net/p/gnu-efi/bugs/37/

Signed-off-by: Callum Farmer <gmbr3@opensuse.org>

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Make ELF constructors and destructors work

This makes setup and teardown functions defined with
__attribute__((__constructor__) and __attribute__((__destructor__)) work
in normal circumstances in EF

Make ELF constructors and destructors work

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>

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Merge /u/gmbr3/gnu-efi/ branch master into master

https://sourceforge.net/p/gnu-efi/code/merge-requests/34/

Make aarch64 crt0/lds more like x86_64

Binutils 2.38 now supports efi-app-aarch64 so
to use this we must add a dummy reloc section
and remove the PE header definition from crt0
as this will conflict

Make aarch64 crt0/lds more like x86_64

Binutils 2.38 now supports efi-app-aarch64 so
to use this we must add a dummy reloc section
and remove the PE header definition from crt0
as this will conflict with the version added
by objcopy

Signed-off-by: Callum Farmer <gmbr3@opensuse.org>

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*/*.S: add non-executable GNU stack marking on ELF-linux

binutils-2.39 enabed a few warning by default
(https://sourceware.org/pipermail/binutils/2022-August/122246.html):

> The ELF linker will now

*/*.S: add non-executable GNU stack marking on ELF-linux

binutils-2.39 enabed a few warning by default
(https://sourceware.org/pipermail/binutils/2022-August/122246.html):

> The ELF linker will now generate a warning message if the stack is made executable.

Let's suppress the warnings in assembly files by adding non-executables
stack markings. This fixes at least systemd build which uses '-Wl,--fatal-warnings':

https://github.com/systemd/systemd/issues/24226

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Set NumberOfSymbols to zero

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 i

Set NumberOfSymbols to zero

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

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For compatibility with an upcoming EDK2 feature that maps UEFI apps
using strict permissions, emit the code as split .text/.data with
R-X/RW- permissions, respectively.

Signed-off-by: Ard Biesheuvel

For compatibility with an upcoming EDK2 feature that maps UEFI apps
using strict permissions, emit the code as split .text/.data with
R-X/RW- permissions, respectively.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Nigel Croxon <ncroxon@redhat.com>

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The gnu-efi-3.0 toplevel subdirectory is really annoying. Kill it.

Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Nigel Croxon <nigel.croxon@hp.com>