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321 lines
9.2 KiB
C
321 lines
9.2 KiB
C
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/* Assembly macros for LoongArch.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _LINUX_LOONGARCH_SYSDEP_H
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#define _LINUX_LOONGARCH_SYSDEP_H 1
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#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
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#include <tls.h>
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#ifdef __ASSEMBLER__
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#include <sys/asm.h>
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#define ret jirl zero, ra, 0
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#define L(label) .L##label
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/* Performs a system call, handling errors by setting errno. Linux indicates
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errors by setting a0 to a value between -1 and -4095. */
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#undef PSEUDO
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#define PSEUDO(name, syscall_name, args) \
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ENTRY (name); \
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li.d a7, SYS_ify (syscall_name); \
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syscall 0; \
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li.d a7, -4096; \
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bltu a7, a0, .Lsyscall_error##name;
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#undef PSEUDO_END
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#define PSEUDO_END(sym) \
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SYSCALL_ERROR_HANDLER (sym); \
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ret; \
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END (sym);
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#if !IS_IN(libc)
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#if RTLD_PRIVATE_ERRNO
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#define SYSCALL_ERROR_HANDLER(name) \
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.Lsyscall_error##name : la t0, rtld_errno; \
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sub.w a0, zero, a0; \
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st.w a0, t0, 0; \
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li.d a0, -1;
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#else
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#define SYSCALL_ERROR_HANDLER(name) \
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.Lsyscall_error##name : la.tls.ie t0, errno; \
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add.d t0, tp, t0; \
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sub.w a0, zero, a0; \
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st.w a0, t0, 0; \
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li.d a0, -1;
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#endif
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#else
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#define SYSCALL_ERROR_HANDLER(name) .Lsyscall_error##name : b __syscall_error;
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#endif
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/* Performs a system call, not setting errno. */
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#undef PSEUDO_NEORRNO
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#define PSEUDO_NOERRNO(name, syscall_name, args) \
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ENTRY (name); \
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li.d a7, SYS_ify (syscall_name); \
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syscall 0;
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#undef PSEUDO_END_NOERRNO
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#define PSEUDO_END_NOERRNO(name) END (name);
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#undef ret_NOERRNO
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#define ret_NOERRNO ret
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/* Perfroms a system call, returning the error code. */
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#undef PSEUDO_ERRVAL
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#define PSEUDO_ERRVAL(name, syscall_name, args) \
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PSEUDO_NOERRNO (name, syscall_name, args); \
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slli.d a0, a0, 32; \
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srai.d a0, a0, 32; /* sign_ext */ \
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sub.d a0, zero, a0;
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#undef PSEUDO_END_ERRVAL
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#define PSEUDO_END_ERRVAL(name) END (name);
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#undef ret_ERRVAL
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#define ret_ERRVAL ret
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#endif /* __ASSEMBLER__ */
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/* In order to get __set_errno() definition in INLINE_SYSCALL. */
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#ifndef __ASSEMBLER__
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#include <errno.h>
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#endif
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#include <sysdeps/unix/sysdep.h>
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#undef SYS_ify
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#define SYS_ify(syscall_name) __NR_##syscall_name
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#ifndef __ASSEMBLER__
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#define VDSO_NAME "LINUX_2.6"
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#define VDSO_HASH 61765110
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/* List of system calls which are supported as vsyscalls. */
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#define HAVE_CLOCK_GETRES64_VSYSCALL "__vdso_clock_getres"
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#define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime"
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#define HAVE_GETCPU_VSYSCALL "__vdso_getcpu"
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#define HAVE_CLONE3_WRAPPER 1
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#define INTERNAL_SYSCALL(name, nr, args...) \
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internal_syscall##nr (SYS_ify (name), args)
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#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
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internal_syscall##nr (number, args)
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#define internal_syscall0(number, dummy...) \
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({ \
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long int _sys_result; \
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\
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{ \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0"); \
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__asm__ volatile ("syscall 0\n\t" \
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: "=r"(__a0) \
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: "r"(__a7) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall1(number, arg0) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall2(number, arg0, arg1) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall3(number, arg0, arg1, arg2) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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register long int __a2 asm ("$a2") = _arg2; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1), "r"(__a2) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall4(number, arg0, arg1, arg2, arg3) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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register long int __a2 asm ("$a2") = _arg2; \
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register long int __a3 asm ("$a3") = _arg3; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall5(number, arg0, arg1, arg2, arg3, arg4) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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register long int __a2 asm ("$a2") = _arg2; \
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register long int __a3 asm ("$a3") = _arg3; \
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register long int __a4 asm ("$a4") = _arg4; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1), "r"(__a2), \
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"r"(__a3), "r"(__a4) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall6(number, arg0, arg1, arg2, arg3, arg4, arg5) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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long int _arg5 = (long int) (arg5); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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register long int __a2 asm ("$a2") = _arg2; \
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register long int __a3 asm ("$a3") = _arg3; \
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register long int __a4 asm ("$a4") = _arg4; \
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register long int __a5 asm ("$a5") = _arg5; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
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"r"(__a4), "r"(__a5) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define internal_syscall7(number, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \
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({ \
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long int _sys_result; \
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\
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{ \
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long int _arg0 = (long int) (arg0); \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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long int _arg5 = (long int) (arg5); \
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long int _arg6 = (long int) (arg6); \
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register long int __a7 asm ("$a7") = number; \
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register long int __a0 asm ("$a0") = _arg0; \
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register long int __a1 asm ("$a1") = _arg1; \
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register long int __a2 asm ("$a2") = _arg2; \
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register long int __a3 asm ("$a3") = _arg3; \
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register long int __a4 asm ("$a4") = _arg4; \
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register long int __a5 asm ("$a5") = _arg5; \
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register long int __a6 asm ("$a6") = _arg6; \
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__asm__ volatile ("syscall 0\n\t" \
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: "+r"(__a0) \
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: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
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"r"(__a4), "r"(__a5), "r"(__a6) \
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: __SYSCALL_CLOBBERS); \
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_sys_result = __a0; \
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} \
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_sys_result; \
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})
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#define __SYSCALL_CLOBBERS \
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"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"
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extern long int __syscall_error (long int neg_errno);
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#endif /* ! __ASSEMBLER__ */
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/* Pointer mangling is not supported. */
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#define PTR_MANGLE(var) (void) (var)
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#define PTR_DEMANGLE(var) (void) (var)
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#endif /* linux/loongarch/sysdep.h */
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