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x86/entry/64: Add __SYSCALL_COMMON()

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Add a __SYSCALL_COMMON() macro to the syscall table, which simplifies syscalltbl.sh.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200313195144.164260-12-brgerst@gmail.com
This commit is contained in:
Brian Gerst 2020-03-13 15:51:37 -04:00 committed by Thomas Gleixner
parent b5592e5c0d
commit 8210efcb15
4 changed files with 9 additions and 20 deletions
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1
arch/x86/entry/syscall_64.c
View File

@ -9,6 +9,7 @@
#include <asm/syscall.h>
#define __SYSCALL_X32(nr, sym)
#define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym)
#define __SYSCALL_64(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
#include <asm/syscalls_64.h>

3
arch/x86/entry/syscall_x32.c
View File

@ -11,10 +11,13 @@
#define __SYSCALL_64(nr, sym)
#define __SYSCALL_X32(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
#define __SYSCALL_COMMON(nr, sym) extern asmlinkage long sym(const struct pt_regs *);
#include <asm/syscalls_64.h>
#undef __SYSCALL_X32
#undef __SYSCALL_COMMON
#define __SYSCALL_X32(nr, sym) [nr] = sym,
#define __SYSCALL_COMMON(nr, sym) [nr] = sym,
asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = {
/*

20
arch/x86/entry/syscalls/syscalltbl.sh
View File

@ -25,7 +25,7 @@ emit() {
fi
# For CONFIG_UML, we need to strip the __x64_sys prefix
if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
if [ "${entry}" != "${entry#__x64_sys}" ]; then
umlentry="sys${entry#__x64_sys}"
fi
@ -53,24 +53,6 @@ emit() {
grep '^[0-9]' "$in" | sort -n | (
while read nr abi name entry compat; do
abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
emit 64 "$nr" "$entry" "$compat"
if [ "$abi" = "COMMON" ]; then
# COMMON means that this syscall exists in the same form for
# 64-bit and X32.
echo "#ifdef CONFIG_X86_X32_ABI"
emit X32 "$nr" "$entry" "$compat"
echo "#endif"
fi
elif [ "$abi" = "X32" ]; then
echo "#ifdef CONFIG_X86_X32_ABI"
emit X32 "$nr" "$entry" "$compat"
echo "#endif"
elif [ "$abi" = "I386" ]; then
emit "$abi" "$nr" "$entry" "$compat"
else
echo "Unknown abi $abi" >&2
exit 1
fi
done
) > "$out"

3
arch/x86/um/sys_call_table_64.c
View File

@ -36,6 +36,9 @@
#define stub_execveat sys_execveat
#define stub_rt_sigreturn sys_rt_sigreturn
#define __SYSCALL_X32(nr, sym)
#define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym)
#define __SYSCALL_64(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
#include <asm/syscalls_64.h>