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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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41
payloads/libpayload/Makefile
View File

@@ -74,6 +74,14 @@ HOSTCC = gcc
HOSTCXX = g++
HOSTCFLAGS := -I$(srck) -I$(objk) -g
HOSTCXXFLAGS := -I$(srck) -I$(objk)
HOSTAS ?= as
HOSTLD ?= ld
HOSTNM ?= nm
HOSTOBJCOPY ?= objcopy
HOSTOBJDUMP ?= objdump
HOSTREADELF ?= readelf
HOSTSTRIP ?= strip
HOSTAR ?= ar
DOXYGEN := doxygen
DOXYGEN_OUTPUT_DIR := doxygen
@@ -95,6 +103,7 @@ include $(HAVE_DOTCONFIG)
ARCHDIR-$(CONFIG_LP_ARCH_ARM) := arm
ARCHDIR-$(CONFIG_LP_ARCH_ARM64) := arm64
ARCHDIR-$(CONFIG_LP_ARCH_X86) := x86
ARCHDIR-$(CONFIG_LP_ARCH_MOCK) := mock
ARCH-y := $(ARCHDIR-y)
@@ -103,6 +112,7 @@ ARCH-y := $(ARCHDIR-y)
ARCH-$(CONFIG_LP_ARCH_ARM) := arm
ARCH-$(CONFIG_LP_ARCH_ARM64) := arm64
ARCH-$(CONFIG_LP_ARCH_X86) := x86_32
ARCH-$(CONFIG_LP_ARCH_MOCK) := mock
# Three cases where we don't need fully populated $(obj) lists:
# 1. when no .config exists
@@ -129,6 +139,31 @@ real-all: config
else
ifeq ($(CONFIG_LP_ARCH_MOCK),y)
# Create empty xcompile to satisfy install script
$(shell echo '' > $(xcompile))
CC := $(HOSTCC)
CC-mock := $(HOSTCC)
AS := $(HOSTAS)
AS-mock := $(HOSTAS)
LD := $(HOSTLD)
LD-mock := $(HOSTLD)
NM := $(HOSTNM)
NM-mock := $(HOSTNM)
OBJCOPY := $(HOSTOBJCOPY)
OBJCOPY-mock := $(HOSTOBJCOPY)
OBJDUMP := $(HOSTOBJDUMP)
OBJDUMP-mock := $(HOSTOBJDUMP)
READELF := $(HOSTREADELF)
READELF-mock := $(HOSTEADELF)
STRIP := $(HOSTSTRIP)
STRIP-mock := $(HOSTSTRIP)
AR := $(HOSTAR)
AR-mock := $(HOSTAR)
else
# in addition to the dependency below, create the file if it doesn't exist
# to silence stupid warnings about a file that would be generated anyway.
$(if $(wildcard $(xcompile)),,$(shell \
@@ -152,12 +187,16 @@ OBJDUMP := $(OBJDUMP_$(ARCH-y))
READELF := $(READELF_$(ARCH-y))
STRIP := $(STRIP_$(ARCH-y))
AR := $(AR_$(ARCH-y))
endif
CFLAGS += -std=gnu11 $(CFLAGS_$(ARCH-y))
ifneq ($(INNER_SCANBUILD),y)
ifeq ($(CONFIG_LP_COMPILER_LLVM_CLANG),y)
CC:=clang -m32
CC:=clang
ifneq ($(CONFIG_LP_ARCH_MOCK),y)
CC += -m32
endif
HOSTCC:=clang
endif
endif