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libpayload: Add mock architecture

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Mock architecture can be used to build libpayload using host compiler.
It can be enabled by setting ARCH_MOCK=y in the dotconfig. It sets
LITTLE_ENDIAN=y, as most machines these days use little-endian CPUs.
Libpayload will use HOSTCC as CC, HOSTLD as LD, etc. instead of tools
provided by xcompile.
Mock architecture configuration can be used by payloads for testing
purposes. Thanks to it, tests can be architecture-independent,
and can be executed without requiring compatible Kconfig options,
e.g. ARCH_ARM64=y for ARM64 machine. However, one has to provide
implementation for most architecture-specific functions present
in arch/* directories.

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: Ie3a6e6f6cad2f8a2e48a8e546d3b79c577653080
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57708
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Jakub Czapiga
2021-09-15 14:52:45 +02:00
committed by Felix Held
parent b40fdbaa64
commit 3d91b47b42
19 changed files with 329 additions and 2 deletions
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13
payloads/libpayload/bin/lpgcc
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@ -91,13 +91,24 @@ if [ "$CONFIG_LP_ARCH_X86" = "y" ]; then
_ARCHEXTRA="-m32 "
_ARCH=x86
fi
if [ "$CONFIG_LP_ARCH_MOCK" = "y" ]; then
_ARCHINCDIR=$_INCDIR/mock
_ARCHLIBDIR=$_LIBDIR/mock
_ARCHEXTRA=""
_ARCH=mock
fi
if [ -f $_LIBDIR/libpayload.ldscript ]; then
_LDDIR=$_LIBDIR
elif [ -f $BASE/../arch/$_ARCH/libpayload.ldscript ]; then
_LDDIR=$BASE/../arch/$_ARCH
fi
_LDSCRIPT="-Wl,-T,$_LDDIR/libpayload.ldscript"
# Host arch should youse default linker script
if [ "$CONFIG_LP_ARCH_MOCK" = "y" ]; then
_LDSCRIPT=""
else
_LDSCRIPT="-Wl,-T,$_LDDIR/libpayload.ldscript"
fi
trygccoption() {
$DEFAULT_CC $1 -S -xc /dev/null -o /dev/null &> /dev/null