82 lines
2 KiB
Bash
82 lines
2 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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in="$1"
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out="$2"
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syscall_macro() {
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abi="$1"
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nr="$2"
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entry="$3"
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# Entry can be either just a function name or "function/qualifier"
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real_entry="${entry%%/*}"
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if [ "$entry" = "$real_entry" ]; then
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qualifier=
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else
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qualifier=${entry#*/}
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fi
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echo "__SYSCALL_${abi}($nr, $real_entry, $qualifier)"
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}
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emit() {
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abi="$1"
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nr="$2"
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entry="$3"
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compat="$4"
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umlentry=""
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if [ "$abi" = "64" -a -n "$compat" ]; then
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echo "a compat entry for a 64-bit syscall makes no sense" >&2
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exit 1
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fi
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# For CONFIG_UML, we need to strip the __x64_sys prefix
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if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
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umlentry="sys${entry#__x64_sys}"
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fi
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if [ -z "$compat" ]; then
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if [ -n "$entry" -a -z "$umlentry" ]; then
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syscall_macro "$abi" "$nr" "$entry"
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elif [ -n "$umlentry" ]; then # implies -n "$entry"
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echo "#ifdef CONFIG_X86"
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syscall_macro "$abi" "$nr" "$entry"
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echo "#else /* CONFIG_UML */"
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syscall_macro "$abi" "$nr" "$umlentry"
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echo "#endif"
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fi
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else
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echo "#ifdef CONFIG_X86_32"
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if [ -n "$entry" ]; then
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syscall_macro "$abi" "$nr" "$entry"
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fi
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echo "#else"
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syscall_macro "$abi" "$nr" "$compat"
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echo "#endif"
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fi
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}
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grep '^[0-9]' "$in" | sort -n | (
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while read nr abi name entry compat; do
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abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
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if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
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# COMMON is the same as 64, except that we don't expect X32
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# programs to use it. Our expectation has nothing to do with
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# any generated code, so treat them the same.
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emit 64 "$nr" "$entry" "$compat"
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elif [ "$abi" = "X32" ]; then
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# X32 is equivalent to 64 on an X32-compatible kernel.
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echo "#ifdef CONFIG_X86_X32_ABI"
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emit 64 "$nr" "$entry" "$compat"
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echo "#endif"
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elif [ "$abi" = "I386" ]; then
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emit "$abi" "$nr" "$entry" "$compat"
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else
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echo "Unknown abi $abi" >&2
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exit 1
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fi
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done
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) > "$out"
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