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asm-offset.h 文件

  asm-offset.h 文件是在内核编译过程中生成的，生成过程  之前整理了一份笔记 TASK_threadsp的实现及asm-offsets.h，    其中涉及sed处理包含在内核代码 /scripts/Makefile.lib的sed-offsets中，工作是将生成的asm-offset.s转化为asm-offset.h。

/scripts/Makefile.lib
...
# ASM offsets
# ---------------------------------------------------------------------------

# Default sed regexp - multiline due to syntax constraints
#
# Use [:space:] because LLVM's integrated assembler inserts <tab> around
# the .ascii directive whereas GCC keeps the <space> as-is.
define sed-offsets
	's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
	/^->/{s:->#\(.*\):/* \1 */:; \
	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
	s:->::; p;}'
endef