forked from OSchip/llvm-project
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
//===------------ inline implementation of x86_64 syscalls ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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%%begin()
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#include "src/__support/common.h"
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#define SYSCALL_CLOBBER_LIST "rcx", "r11", "memory"
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namespace __llvm_libc {
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__attribute__((always_inline)) inline long syscall(long __number) {
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long retcode;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long syscall(long __number, long __arg1) {
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long retcode;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long syscall(long __number, long __arg1,
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long __arg2) {
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long retcode;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1), "S"(__arg2)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long syscall(long __number, long __arg1,
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long __arg2, long __arg3) {
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long retcode;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long
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syscall(long __number, long __arg1, long __arg2, long __arg3, long __arg4) {
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long retcode;
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register long r10 __asm__("r10") = __arg4;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
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"r"(r10)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long syscall(long __number, long __arg1,
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long __arg2, long __arg3,
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long __arg4, long __arg5) {
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long retcode;
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register long r10 __asm__("r10") = __arg4;
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register long r8 __asm__("r8") = __arg5;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
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"r"(r10), "r"(r8)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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__attribute__((always_inline)) inline long syscall(long __number, long __arg1,
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long __arg2, long __arg3,
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long __arg4, long __arg5,
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long __arg6) {
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long retcode;
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register long r10 __asm__("r10") = __arg4;
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register long r8 __asm__("r8") = __arg5;
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register long r9 __asm__("r9") = __arg6;
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LIBC_INLINE_ASM("syscall"
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: "=a"(retcode)
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: "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
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"r"(r10), "r"(r8), "r"(r9)
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: SYSCALL_CLOBBER_LIST);
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return retcode;
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}
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template <typename... Ts>
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__attribute__((always_inline)) inline long syscall(long __number, Ts... ts) {
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static_assert(sizeof...(Ts) <= 6, "Too many arguments for syscall");
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return syscall(__number, (long)ts...);
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}
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#undef SYSCALL_CLOBBER_LIST
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} // namespace __llvm_libc
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