4 files changed, 109 insertions, 0 deletions
diff --git a/payloads/libpayload/sample/Makefile b/payloads/libpayload/sample/Makefile
index 637e45dee1..1249e9a017 100644
--- a/payloads/libpayload/sample/Makefile
+++ b/payloads/libpayload/sample/Makefile
@@ -26,8 +26,13 @@
 ## SUCH DAMAGE.
 ##
 
+
 # Sample libpayload Makefile.
 include ../.config
+ifeq ($(CONFIG_LP_ARCH_MOCK),y)
+$(error This sample program does not support ARCH_MOCK. Use sample/arch_mock instead)
+endif
+
 include ../build/xcompile
 
 ARCH-$(CONFIG_LP_ARCH_ARM)   := arm
diff --git a/payloads/libpayload/sample/arch_mock/Makefile b/payloads/libpayload/sample/arch_mock/Makefile
new file mode 100644
index 0000000000..a1e748111e
--- /dev/null
+++ b/payloads/libpayload/sample/arch_mock/Makefile
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Sample libpayload Makefile for ARCH_MOCK
+# ARCH_MOCK is not intended to be used with xcompile
+include ../../.config
+
+ifneq ($(CONFIG_LP_ARCH_MOCK),y)
+$(error This example supports ARCH_MOCK only.)
+endif
+
+CC := gcc
+AS := as
+OBJCOPY := objcopy
+LIBPAYLOAD_DIR := ../../install/libpayload
+CFLAGS := -fno-builtin -Wall -Werror -Os \
+	-include $(LIBPAYLOAD_DIR)/include/kconfig.h \
+	-include $(LIBPAYLOAD_DIR)/include/compiler.h \
+	-I $(LIBPAYLOAD_DIR)/include \
+	-I $(LIBPAYLOAD_DIR)/include/mock \
+	-ffunction-sections \
+	-fdata-sections -g3
+LDFLAGS := -Wl,--gc-sections
+TARGET := hello
+OBJS := $(TARGET).o
+OBJS-mock := $(TARGET)_mocks.o
+LIBPAYLOAD-local := libpayload.a
+mocks := console_write
+
+all: $(TARGET).elf
+
+$(TARGET).elf: $(OBJS) $(OBJS-mock) $(LIBPAYLOAD-local)
+	$(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBPAYLOAD-local) \
+		-Wl,--exclude-libs,ALL -lc $(OBJS-mock)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+%.S.o: %.S
+	$(AS) --32 -o $@ $<
+
+# Copy libpayload and weaken all mocked symbols
+$(LIBPAYLOAD-local): $(LIBPAYLOAD_DIR)/lib/libpayload.a
+	$(OBJCOPY) $(foreach mock,$(mocks),--weaken-symbol=$(mock)) $< $@
+
+clean:
+	rm -f $(TARGET).elf *.o $(LIBPAYLOAD-local)
+
+distclean: clean
diff --git a/payloads/libpayload/sample/arch_mock/hello.c b/payloads/libpayload/sample/arch_mock/hello.c
new file mode 100644
index 0000000000..5a96e42e75
--- /dev/null
+++ b/payloads/libpayload/sample/arch_mock/hello.c
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* Example file for libpayload. */
+
+#include <libpayload-config.h>
+#include <libpayload.h>
+
+int main(void)
+{
+	printf("Hello world!\n");
+	halt();
+	return 0;
+}
diff --git a/payloads/libpayload/sample/arch_mock/hello_mocks.c b/payloads/libpayload/sample/arch_mock/hello_mocks.c
new file mode 100644
index 0000000000..84e86ff257
--- /dev/null
+++ b/payloads/libpayload/sample/arch_mock/hello_mocks.c
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <libpayload-config.h>
+#include <arch/types.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <stdio.h>
+
+/* Use libc version. calling exit() or abort() would cause infinite recursion */
+__attribute__((noreturn))
+void _exit(int);
+
+__attribute__((noreturn))
+void halt(void)
+{
+	_exit(0);
+}
+
+#define TEST_SYMBOL(symbol, value) asm(".set " #symbol ", " #value "\n\t.globl " #symbol)
+
+#define TEST_REGION(region, size) uint8_t _##region[size]; \
+	TEST_SYMBOL(_e##region, _##region + size); \
+	TEST_SYMBOL(_##region##_size, size)
+
+TEST_REGION(heap, CONFIG_LP_HEAP_SIZE);
+
+uint64_t timer_raw_value(void)
+{
+	return 0;
+}
+
+uint64_t timer_hz(void)
+{
+	return 0;
+}
+
+/* Not present in libpayload. Can be used to write to real stdout. */
+ssize_t write(int fildes, const void *buf, size_t nbyte);
+
+void console_write(const void *buffer, size_t count)
+{
+	write(1, buffer, count);
+}