linux-stable/arch/x86/entry/syscall_32.c
Brian Gerst 0f78ff1711 x86/entry: Drop asmlinkage from syscalls
asmlinkage is no longer required since the syscall ABI is now fully under
x86 architecture control.  This makes the 32-bit native syscalls a bit more
effecient by passing in regs via EAX instead of on the stack.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200313195144.164260-18-brgerst@gmail.com
2020-03-21 16:03:25 +01:00

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C

// SPDX-License-Identifier: GPL-2.0
/* System call table for i386. */
#include <linux/linkage.h>
#include <linux/sys.h>
#include <linux/cache.h>
#include <linux/syscalls.h>
#include <asm/unistd.h>
#include <asm/syscall.h>
#define __SYSCALL_I386(nr, sym) extern long __ia32_##sym(const struct pt_regs *);
#include <asm/syscalls_32.h>
#undef __SYSCALL_I386
#define __SYSCALL_I386(nr, sym) [nr] = __ia32_##sym,
__visible const sys_call_ptr_t ia32_sys_call_table[__NR_ia32_syscall_max+1] = {
/*
* Smells like a compiler bug -- it doesn't work
* when the & below is removed.
*/
[0 ... __NR_ia32_syscall_max] = &__ia32_sys_ni_syscall,
#include <asm/syscalls_32.h>
};