aboutsummaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorWolfgang Denk <wd@denx.de>2010-10-26 00:08:35 +0200
committerWolfgang Denk <wd@denx.de>2010-10-26 21:04:34 +0200
commit16a354f920f3959ed847bd917bdfbc7eba48cf1e (patch)
tree71272417ffdc5942abadc01d251d5b03a4d99fd2 /tools
parent553f09823cced77296825f615f00321d932bf914 (diff)
downloadu-boot-linaro-stable-16a354f920f3959ed847bd917bdfbc7eba48cf1e.tar.gz
include/asm-offsets.h: automatically generate assembler constants
A recurrent issue is that certain C level constructs like sizeof() or offsetof() cannot be used in assembler files, which is inconvenient when such constructs are used in the definition of macro names etc. To avoid duplication of such definitions (and thus another cause of problems), we adapt the Linux way to automatically generate the respective definitions from the respective C header files. In Linux, this is implemented in include/linux/kbuild.h, Kbuild, and arch/*/kernel/asm-offsets.c; we adapt the code from the Linux v2.6.36 kernel tree. We also copy the concept of the include/generated/ directory which can be used to hold other automatically generated files as well. We start with an architecture-independent lib/asm-offsets.c which generates include/generated/generic-asm-offsets.h (included by include/asm-offsets.h, which is what will be referred to in the actual source code). Later this may be extended by architecture-specific arch/*/lib/asm-offsets.c files that will generate a include/generated/asm-offsets.h. Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'tools')
-rwxr-xr-xtools/scripts/make-asm-offsets27
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/scripts/make-asm-offsets b/tools/scripts/make-asm-offsets
new file mode 100755
index 000000000..61c095f42
--- /dev/null
+++ b/tools/scripts/make-asm-offsets
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# Adapted from Linux kernel's "Kbuild":
+# commit 1cdf25d704f7951d02a04064c97db547d6021872
+# Author: Christoph Lameter <clameter@sgi.com>
+
+mkdir -p $(dirname $2)
+
+# Default sed regexp - multiline due to syntax constraints
+SED_CMD="/^->/{s:->#\(.*\):/* \1 */:; \
+ s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 (\2) /* \3 */:; \
+ s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
+ s:->::; p;}"
+
+(set -e
+ echo "#ifndef __ASM_OFFSETS_H__"
+ echo "#define __ASM_OFFSETS_H__"
+ echo "/*"
+ echo " * DO NOT MODIFY."
+ echo " *"
+ echo " * This file was generated by $(basename $0)"
+ echo " *"
+ echo " */"
+ echo ""
+ sed -ne "${SED_CMD}" $1
+ echo ""
+ echo "#endif" ) > $2