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#!/usr/bin/awk -f
# SPDX-License-Identifier: GPL-2.0
#
# Extract marked sections from ARM64 headers for sharing with s390 KVM
#
# Usage: copy-arm64h.awk <input_file>
#
# Extracts all sections between start/end markers. If no markers found, signals for fallback.
BEGIN {
# Constants
start_pattern = "^#if ARM64_S390_COMMON == 1$"
end_pattern = "^#endif \\/\\* ARM64_S390_COMMON == 1 \\*\\/$"
max_guard_line = 25
# State variables
copying = found_marker = error = 0
guard_name = ""
file_header_done = 0
depth = 0
}
NR <= max_guard_line && !guard_name && /^#ifndef [A-Za-z0-9_]+$/ {
guard_name = $2
next
}
NR > max_guard_line && !guard_name && !file_header_done {
print "error: no include guard found in first " max_guard_line " lines" > "/dev/stderr"
file_header_done = 1
error = 1; exit
}
$0 ~ start_pattern {
if (copying) { error = 1; exit }
if (!found_marker) {
print "/*"
print " * This header was automatically generated from " FILENAME
print " * Do not modify this file directly."
print " */"
print "#ifndef " guard_name
print "#define " guard_name
print ""
}
depth = copying= found_marker = 1
# Map subsequent lines back to the original ARM64 source file so that
# compiler diagnostics point there rather than at the generated copy.
print "#line " (NR + 1) " \"" FILENAME "\""
next
}
guard_name && !found_marker {
next
}
$0 ~ /^[ \t]*#[ \t]*endif/ {
depth--
if (depth == 0) {
if ($0 ~ end_pattern ) {
copying = 0
next
}
error = 1; exit
}
}
/ARM64_S390_COMMON/ { error = 1; exit }
copying {
if ($0 ~ /^[ \t]*#[ \t]*if(def|ndef)?([ \t]|$)/) depth++
gsub(/#include <asm\//, "#include <arm64/")
gsub(/#include <uapi\/asm\//, "#include <uapi/arm64/")
print
next
}
END {
if (error) exit 1
if (found_marker) {
print ""
print "#endif /* " guard_name " */"
}
exit !found_marker || copying
}
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