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/* Assembly macros for LoongArch.
Copyright (C) 2022-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#ifndef _LINUX_LOONGARCH_SYSDEP_H
#define _LINUX_LOONGARCH_SYSDEP_H 1
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/sysdep.h>
#include <tls.h>
#ifdef __ASSEMBLER__
#include <sys/asm.h>
#define ret jirl zero, ra, 0
#define L(label) .L##label
/* Performs a system call, handling errors by setting errno. Linux indicates
errors by setting a0 to a value between -1 and -4095. */
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
ENTRY (name); \
li.d a7, SYS_ify (syscall_name); \
syscall 0; \
li.d a7, -4096; \
bltu a7, a0, .Lsyscall_error##name;
#undef PSEUDO_END
#define PSEUDO_END(sym) \
SYSCALL_ERROR_HANDLER (sym); \
ret; \
END (sym);
#if !IS_IN(libc)
#if RTLD_PRIVATE_ERRNO
#define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error##name : la t0, rtld_errno; \
sub.w a0, zero, a0; \
st.w a0, t0, 0; \
li.d a0, -1;
#else
#define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error##name : la.tls.ie t0, errno; \
add.d t0, tp, t0; \
sub.w a0, zero, a0; \
st.w a0, t0, 0; \
li.d a0, -1;
#endif
#else
#define SYSCALL_ERROR_HANDLER(name) .Lsyscall_error##name : b __syscall_error;
#endif
/* Performs a system call, not setting errno. */
#undef PSEUDO_NEORRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
ENTRY (name); \
li.d a7, SYS_ify (syscall_name); \
syscall 0;
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) END (name);
#undef ret_NOERRNO
#define ret_NOERRNO ret
/* Performs a system call, returning the error code. */
#undef PSEUDO_ERRVAL
#define PSEUDO_ERRVAL(name, syscall_name, args) \
PSEUDO_NOERRNO (name, syscall_name, args); \
slli.d a0, a0, 32; \
srai.d a0, a0, 32; /* sign_ext */ \
sub.d a0, zero, a0;
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(name) END (name);
#undef ret_ERRVAL
#define ret_ERRVAL ret
#endif /* __ASSEMBLER__ */
/* In order to get __set_errno() definition in INLINE_SYSCALL. */
#ifndef __ASSEMBLER__
#include <errno.h>
#endif
#include <sysdeps/unix/sysdep.h>
#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name
#ifndef __ASSEMBLER__
#define VDSO_NAME "LINUX_5.10"
#define VDSO_HASH 182947696
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETRES64_VSYSCALL "__vdso_clock_getres"
#define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime"
#define HAVE_GETTIMEOFDAY_VSYSCALL "__vdso_gettimeofday"
#define HAVE_GETCPU_VSYSCALL "__vdso_getcpu"
#define HAVE_GETRANDOM_VSYSCALL "__vdso_getrandom"
#define HAVE_CLONE3_WRAPPER 1
#define INTERNAL_SYSCALL(name, nr, args...) \
internal_syscall##nr (SYS_ify (name), args)
#define INTERNAL_SYSCALL_NCS(number, nr, args...) \
internal_syscall##nr (number, args)
#define internal_syscall0(number, dummy...) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0"); \
__asm__ volatile ("syscall 0\n\t" \
: "=r"(__a0) \
: "r"(__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall1(number, arg0) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall2(number, arg0, arg1) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall3(number, arg0, arg1, arg2) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall4(number, arg0, arg1, arg2, arg3) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall5(number, arg0, arg1, arg2, arg3, arg4) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), \
"r"(__a3), "r"(__a4) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall6(number, arg0, arg1, arg2, arg3, arg4, arg5) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
register long int __a5 asm ("$a5") = _arg5; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
"r"(__a4), "r"(__a5) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define internal_syscall7(number, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
long int _sys_result; \
\
{ \
long int _arg0 = (long int) (arg0); \
long int _arg1 = (long int) (arg1); \
long int _arg2 = (long int) (arg2); \
long int _arg3 = (long int) (arg3); \
long int _arg4 = (long int) (arg4); \
long int _arg5 = (long int) (arg5); \
long int _arg6 = (long int) (arg6); \
register long int __a7 asm ("$a7") = number; \
register long int __a0 asm ("$a0") = _arg0; \
register long int __a1 asm ("$a1") = _arg1; \
register long int __a2 asm ("$a2") = _arg2; \
register long int __a3 asm ("$a3") = _arg3; \
register long int __a4 asm ("$a4") = _arg4; \
register long int __a5 asm ("$a5") = _arg5; \
register long int __a6 asm ("$a6") = _arg6; \
__asm__ volatile ("syscall 0\n\t" \
: "+r"(__a0) \
: "r"(__a7), "r"(__a1), "r"(__a2), "r"(__a3), \
"r"(__a4), "r"(__a5), "r"(__a6) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
#define __SYSCALL_CLOBBERS \
"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"
extern long int __syscall_error (long int neg_errno);
#endif /* ! __ASSEMBLER__ */
#endif /* linux/loongarch/sysdep.h */
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