From 7fb474b9dde5d56e0d4d6a0c1627337694cdc2f2 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Fri, 13 May 2022 09:26:00 +0530 Subject: [PATCH] Makefile: Add support for generating C array at compile time Generating C array at compile time based on details provided by objects.mk is a very useful feature which will help us compile only a subset of drivers or modules. We add a bash script (carray.sh) which takes array details and object/variable list from command-line to generate a C source containing array of object/variable pointers. We also extend top-level makefile to use carray.sh whenever specified through objects.mk. Signed-off-by: Anup Patel Reviewed-by: Atish Patra --- Makefile | 11 +++++++ scripts/carray.sh | 77 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 88 insertions(+) create mode 100755 scripts/carray.sh diff --git a/Makefile b/Makefile index 30f7c461..f619ef75 100644 --- a/Makefile +++ b/Makefile @@ -404,6 +404,10 @@ compile_d2c = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \ $(if $($(2)-varprefix-$(3)),$(eval D2C_NAME_PREFIX := $($(2)-varprefix-$(3))),$(eval D2C_NAME_PREFIX := $(5))) \ $(if $($(2)-padding-$(3)),$(eval D2C_PADDING_BYTES := $($(2)-padding-$(3))),$(eval D2C_PADDING_BYTES := 0)) \ $(src_dir)/scripts/d2c.sh -i $(6) -a $(D2C_ALIGN_BYTES) -p $(D2C_NAME_PREFIX) -t $(D2C_PADDING_BYTES) > $(1) +compile_carray = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \ + echo " CARRAY $(subst $(build_dir)/,,$(1))"; \ + $(eval CARRAY_VAR_LIST := $(carray-$(subst .c,,$(shell basename $(1)))-y)) \ + $(src_dir)/scripts/carray.sh -i $(2) -l "$(CARRAY_VAR_LIST)" > $(1) compile_gen_dep = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \ echo " GEN-DEP $(subst $(build_dir)/,,$(1))"; \ echo "$(1:.dep=$(2)): $(3)" >> $(1) @@ -451,6 +455,13 @@ $(build_dir)/%.dep: $(src_dir)/%.S $(build_dir)/%.o: $(src_dir)/%.S $(call compile_as,$@,$<) +$(build_dir)/%.dep: $(src_dir)/%.carray + $(call compile_gen_dep,$@,.c,$<) + $(call compile_gen_dep,$@,.o,$(@:.dep=.c)) + +$(build_dir)/%.c: $(src_dir)/%.carray + $(call compile_carray,$@,$<) + $(platform_build_dir)/%.bin: $(platform_build_dir)/%.elf $(call compile_objcopy,$@,$<) diff --git a/scripts/carray.sh b/scripts/carray.sh new file mode 100755 index 00000000..0c52bd6f --- /dev/null +++ b/scripts/carray.sh @@ -0,0 +1,77 @@ +#!/bin/bash + +function usage() +{ + echo "Usage:" + echo " $0 [options]" + echo "Options:" + echo " -h Display help or usage" + echo " -i Input config file" + echo " -l List of variables in the array (Optional)" + exit 1; +} + +# Command line options +CONFIG_FILE="" +VAR_LIST="" + +while getopts "hi:l:" o; do + case "${o}" in + h) + usage + ;; + i) + CONFIG_FILE=${OPTARG} + ;; + l) + VAR_LIST=${OPTARG} + ;; + *) + usage + ;; + esac +done +shift $((OPTIND-1)) + +if [ -z "${CONFIG_FILE}" ]; then + echo "Must specify input config file" + usage +fi + +if [ ! -f "${CONFIG_FILE}" ]; then + echo "The input config file should be a present" + usage +fi + +TYPE_HEADER=`cat ${CONFIG_FILE} | awk '{ if ($1 == "HEADER:") { printf $2; exit 0; } }'` +if [ -z "${TYPE_HEADER}" ]; then + echo "Must specify HEADER: in input config file" + usage +fi + +TYPE_NAME=`cat ${CONFIG_FILE} | awk '{ if ($1 == "TYPE:") { printf $2; for (i=3; i<=NF; i++) printf " %s", $i; exit 0; } }'` +if [ -z "${TYPE_NAME}" ]; then + echo "Must specify TYPE: in input config file" + usage +fi + +ARRAY_NAME=`cat ${CONFIG_FILE} | awk '{ if ($1 == "NAME:") { printf $2; exit 0; } }'` +if [ -z "${ARRAY_NAME}" ]; then + echo "Must specify NAME: in input config file" + usage +fi + +printf "#include <%s>\n\n" "${TYPE_HEADER}" + +for VAR in ${VAR_LIST}; do + printf "extern %s %s;\n" "${TYPE_NAME}" "${VAR}" +done +printf "\n" + +printf "%s *%s[] = {\n" "${TYPE_NAME}" "${ARRAY_NAME}" +for VAR in ${VAR_LIST}; do + printf "\t&%s,\n" "${VAR}" +done +printf "};\n\n" + +printf "unsigned long %s_size = sizeof(%s) / sizeof(%s *);\n" "${ARRAY_NAME}" "${ARRAY_NAME}" "${TYPE_NAME}"