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d5a00528b5
This rename allows us to have a coherent syscall stub naming convention on
64-bit x86 (0xffffffff prefix removed):
810f0af0 t kernel_waitid # common (32/64) kernel helper
<inline> __do_sys_waitid # inlined helper doing actual work
810f0be0 t __se_sys_waitid # C func calling inlined helper
<inline> __do_compat_sys_waitid # inlined helper doing actual work
810f0d80 t __se_compat_sys_waitid # compat C func calling inlined helper
810f2080 T __x64_sys_waitid # x64 64-bit-ptregs -> C stub
810f20b0 T __ia32_sys_waitid # ia32 32-bit-ptregs -> C stub[*]
810f2470 T __ia32_compat_sys_waitid # ia32 32-bit-ptregs -> compat C stub
810f2490 T __x32_compat_sys_waitid # x32 64-bit-ptregs -> compat C stub
[*] This stub is unused, as the syscall table links
__ia32_compat_sys_waitid instead of __ia32_sys_waitid as we need
a compat variant here.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180409105145.5364-4-linux@dominikbrodowski.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
82 lines
2.0 KiB
Bash
82 lines
2.0 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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