musl/arch/x86_64/syscall.h

#ifndef _SYSCALL_H
#define _SYSCALL_H

#define SYSCALL_LL(x) x, 0
#define SYSCALL_SIGSET_SIZE 8

#if defined(SYSCALL_STANDALONE)
#include <errno.h>
static inline long __syscall_ret(unsigned long r)
{
	if (r >= (unsigned long)-1 - 4096) {
		errno = -(long)r;
		return -1;
	}
	return (long)r;
}
#elif defined(SYSCALL_NORETURN)
static inline long __syscall_ret(unsigned long r)
{
	for(;;);
	return 0;
}
#elif defined(SYSCALL_RETURN_ERRNO)
static inline long __syscall_ret(unsigned long r)
{
	return -r;
}
#else
extern long __syscall_ret(unsigned long);
#endif

// 64: di,  si,  dx,  r10, r8,  r9
// 32: ebx, ecx, edx, esi, edi, ebp

#define SYSCALL "syscall"

static inline long syscall0(long n)
{
	unsigned long ret;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n) : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall1(long n, long a1)
{
	unsigned long ret;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1) : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall2(long n, long a1, long a2)
{
	unsigned long ret;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2)
						  : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall3(long n, long a1, long a2, long a3)
{
	unsigned long ret;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
						  "d"(a3) : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall4(long n, long a1, long a2, long a3, long a4)
{
	unsigned long ret;
	register long r10 __asm__("r10") = a4;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
						  "d"(a3), "r"(r10): "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall5(long n, long a1, long a2, long a3, long a4,
							long a5)
{
	unsigned long ret;
	register long r10 __asm__("r10") = a4;
	register long r8 __asm__("r8") = a5;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
						  "d"(a3), "r"(r10), "r"(r8) : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

static inline long syscall6(long n, long a1, long a2, long a3, long a4,
							long a5, long a6)
{
	unsigned long ret;
	register long r10 __asm__("r10") = a4;
	register long r8 __asm__("r8") = a5;
	register long r9 __asm__("r9") = a6;
	__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
						  "d"(a3), "r"(r10), "r"(r8), "r"(r9) : "rcx", "r11", "memory");
	return __syscall_ret(ret);
}

#define __NR_read				0
#define __NR_write				1
#define __NR_open				2
#define __NR_close				3
#define __NR_stat				4
#define __NR_fstat				5
#define __NR_lstat				6
#define __NR_poll				7
#define __NR_lseek				8
#define __NR_mmap				9
#define __NR_mprotect			10
#define __NR_munmap				11
#define __NR_brk				12
#define __NR_rt_sigaction		13
#define __NR_rt_sigprocmask		14
#define __NR_rt_sigreturn		15
#define __NR_ioctl				16
#define __NR_pread64			17
#define __NR_pwrite64			18
#define __NR_readv				19
#define __NR_writev				20
#define __NR_access				21
#define __NR_pipe				22
#define __NR_select				23
#define __NR_sched_yield		24
#define __NR_mremap				25
#define __NR_msync				26
#define __NR_mincore			27
#define __NR_madvise			28
#define __NR_shmget				29
#define __NR_shmat				30
#define __NR_shmctl				31
#define __NR_dup				32
#define __NR_dup2				33
#define __NR_pause				34
#define __NR_nanosleep			35
#define __NR_getitimer			36
#define __NR_alarm				37
#define __NR_setitimer			38
#define __NR_getpid				39
#define __NR_sendfile			40
#define __NR_socket				41
#define __NR_connect			42
#define __NR_accept				43
#define __NR_sendto				44
#define __NR_recvfrom			45
#define __NR_sendmsg			46
#define __NR_recvmsg			47
#define __NR_shutdown			48
#define __NR_bind				49
#define __NR_listen				50
#define __NR_getsockname		51
#define __NR_getpeername		52
#define __NR_socketpair			53
#define __NR_setsockopt			54
#define __NR_getsockopt			55
#define __NR_clone				56
#define __NR_fork				57
#define __NR_vfork				58
#define __NR_execve				59
#define __NR_exit				60
#define __NR_wait4				61
#define __NR_kill				62
#define __NR_uname				63
#define __NR_semget				64
#define __NR_semop				65
#define __NR_semctl				66
#define __NR_shmdt				67
#define __NR_msgget				68
#define __NR_msgsnd				69
#define __NR_msgrcv				70
#define __NR_msgctl				71
#define __NR_fcntl				72
#define __NR_flock				73
#define __NR_fsync				74
#define __NR_fdatasync			75
#define __NR_truncate			76
#define __NR_ftruncate			77
#define __NR_getdents			78
#define __NR_getcwd				79
#define __NR_chdir				80
#define __NR_fchdir				81
#define __NR_rename				82
#define __NR_mkdir				83
#define __NR_rmdir				84
#define __NR_creat				85
#define __NR_link				86
#define __NR_unlink				87
#define __NR_symlink			88
#define __NR_readlink			89
#define __NR_chmod				90
#define __NR_fchmod				91
#define __NR_chown				92
#define __NR_fchown				93
#define __NR_lchown				94
#define __NR_umask				95
#define __NR_gettimeofday		96
#define __NR_getrlimit			97
#define __NR_getrusage			98
#define __NR_sysinfo			99
#define __NR_times				100
#define __NR_ptrace				101
#define __NR_getuid				102
#define __NR_syslog				103
#define __NR_getgid				104
#define __NR_setuid				105
#define __NR_setgid				106
#define __NR_geteuid			107
#define __NR_getegid			108
#define __NR_setpgid			109
#define __NR_getppid			110
#define __NR_getpgrp			111
#define __NR_setsid				112
#define __NR_setreuid			113
#define __NR_setregid			114
#define __NR_getgroups			115
#define __NR_setgroups			116
#define __NR_setresuid			117
#define __NR_getresuid			118
#define __NR_setresgid			119
#define __NR_getresgid			120
#define __NR_getpgid			121
#define __NR_setfsuid			122
#define __NR_setfsgid			123
#define __NR_getsid				124
#define __NR_capget				125
#define __NR_capset				126
#define __NR_rt_sigpending		127
#define __NR_rt_sigtimedwait	128
#define __NR_rt_sigqueueinfo	129
#define __NR_rt_sigsuspend		130
#define __NR_sigaltstack		131
#define __NR_utime				132
#define __NR_mknod				133
#define __NR_uselib				134
#define __NR_personality		135
#define __NR_ustat				136
#define __NR_statfs				137
#define __NR_fstatfs			138
#define __NR_sysfs				139
#define __NR_getpriority			140
#define __NR_setpriority			141
#define __NR_sched_setparam			142
#define __NR_sched_getparam			143
#define __NR_sched_setscheduler		144
#define __NR_sched_getscheduler		145
#define __NR_sched_get_priority_max	146
#define __NR_sched_get_priority_min	147
#define __NR_sched_rr_get_interval	148
#define __NR_mlock					149
#define __NR_munlock				150
#define __NR_mlockall				151
#define __NR_munlockall				152
#define __NR_vhangup				153
#define __NR_modify_ldt				154
#define __NR_pivot_root				155
#define __NR__sysctl				156
#define __NR_prctl					157
#define __NR_arch_prctl				158
#define __NR_adjtimex				159
#define __NR_setrlimit				160
#define __NR_chroot					161
#define __NR_sync					162
#define __NR_acct					163
#define __NR_settimeofday			164
#define __NR_mount					165
#define __NR_umount2				166
#define __NR_swapon					167
#define __NR_swapoff				168
#define __NR_reboot					169
#define __NR_sethostname			170
#define __NR_setdomainname			171
#define __NR_iopl					172
#define __NR_ioperm					173
#define __NR_create_module			174
#define __NR_init_module			175
#define __NR_delete_module			176
#define __NR_get_kernel_syms		177
#define __NR_query_module			178
#define __NR_quotactl				179
#define __NR_nfsservctl				180
#define __NR_getpmsg				181
#define __NR_putpmsg				182
#define __NR_afs_syscall			183
#define __NR_tuxcall				184
#define __NR_security				185
#define __NR_gettid					186
#define __NR_readahead				187
#define __NR_setxattr				188
#define __NR_lsetxattr				189
#define __NR_fsetxattr				190
#define __NR_getxattr				191
#define __NR_lgetxattr				192
#define __NR_fgetxattr				193
#define __NR_listxattr				194
#define __NR_llistxattr				195
#define __NR_flistxattr				196
#define __NR_removexattr			197
#define __NR_lremovexattr			198
#define __NR_fremovexattr			199
#define __NR_tkill					200
#define __NR_time					201
#define __NR_futex					202
#define __NR_sched_setaffinity		203
#define __NR_sched_getaffinity		204
#define __NR_set_thread_area		205
#define __NR_io_setup				206
#define __NR_io_destroy				207
#define __NR_io_getevents			208
#define __NR_io_submit				209
#define __NR_io_cancel				210
#define __NR_get_thread_area		211
#define __NR_lookup_dcookie			212
#define __NR_epoll_create			213
#define __NR_epoll_ctl_old			214
#define __NR_epoll_wait_old			215
#define __NR_remap_file_pages		216
#define __NR_getdents64				217
#define __NR_set_tid_address		218
#define __NR_restart_syscall		219
#define __NR_semtimedop				220
#define __NR_fadvise64				221
#define __NR_timer_create			222
#define __NR_timer_settime			223
#define __NR_timer_gettime			224
#define __NR_timer_getoverrun		225
#define __NR_timer_delete			226
#define __NR_clock_settime			227
#define __NR_clock_gettime			228
#define __NR_clock_getres			229
#define __NR_clock_nanosleep		230
#define __NR_exit_group				231
#define __NR_epoll_wait				232
#define __NR_epoll_ctl				233
#define __NR_tgkill					234
#define __NR_utimes					235
#define __NR_vserver				236
#define __NR_mbind					237
#define __NR_set_mempolicy			238
#define __NR_get_mempolicy			239
#define __NR_mq_open				240
#define __NR_mq_unlink				241
#define __NR_mq_timedsend			242
#define __NR_mq_timedreceive		243
#define __NR_mq_notify				244
#define __NR_mq_getsetattr			245
#define __NR_kexec_load				246
#define __NR_waitid					247
#define __NR_add_key				248
#define __NR_request_key			249
#define __NR_keyctl					250
#define __NR_ioprio_set				251
#define __NR_ioprio_get				252
#define __NR_inotify_init			253
#define __NR_inotify_add_watch		254
#define __NR_inotify_rm_watch		255
#define __NR_migrate_pages			256
#define __NR_openat					257
#define __NR_mkdirat				258
#define __NR_mknodat				259
#define __NR_fchownat				260
#define __NR_futimesat				261
#define __NR_newfstatat				262
#define __NR_unlinkat				263
#define __NR_renameat				264
#define __NR_linkat					265
#define __NR_symlinkat				266
#define __NR_readlinkat				267
#define __NR_fchmodat				268
#define __NR_faccessat				269
#define __NR_pselect6				270
#define __NR_ppoll					271
#define __NR_unshare				272
#define __NR_set_robust_list		273
#define __NR_get_robust_list		274
#define __NR_splice					275
#define __NR_tee					276
#define __NR_sync_file_range		277
#define __NR_vmsplice				278
#define __NR_move_pages				279
#define __NR_utimensat				280
#define __NR_epoll_pwait			281
#define __NR_signalfd				282
#define __NR_timerfd_create			283
#define __NR_eventfd				284
#define __NR_fallocate				285
#define __NR_timerfd_settime		286
#define __NR_timerfd_gettime		287
#define __NR_accept4				288
#define __NR_signalfd4				289
#define __NR_eventfd2				290
#define __NR_epoll_create1			291
#define __NR_dup3					292
#define __NR_pipe2					293
#define __NR_inotify_init1			294
#define __NR_preadv					295
#define __NR_pwritev				296
#define __NR_rt_tgsigqueueinfo		297
#define __NR_perf_event_open		298
#define __NR_recvmmsg				299
#define __NR_fanotify_init			300
#define __NR_fanotify_mark			301
#define __NR_prlimit64				302

#undef __NR_fstatat
#undef __NR_pread
#undef __NR_pwrite
#define __NR_fstatat __NR_newfstatat
#define __NR_pread __NR_pread64
#define __NR_pwrite __NR_pwrite64

#undef O_LARGEFILE
#define O_LARGEFILE 0100000

#define socketcall(nm, a, b, c, d, e, f) syscall6(__NR_##nm, \
    (long)a, (long)b, (long)c, (long)d, (long)e, (long)f)

/* the following are needed for iso c functions to use */
#define __syscall_open(filename, flags, mode) syscall3(__NR_open, (long)(filename), (flags)|O_LARGEFILE, (mode))
#define __syscall_read(fd, buf, len)          syscall3(__NR_read, (fd), (long)(buf), (len))
#define __syscall_write(fd, buf, len)         syscall3(__NR_write, (fd), (long)(buf), (len))
#define __syscall_close(fd)                   syscall1(__NR_close, (fd))
#define __syscall_fcntl(fd, cmd, arg)         syscall3(__NR_fcntl, (fd), (cmd), (long)(arg))
#define __syscall_dup2(old, new)              syscall2(__NR_dup2, (old), (new))
#define __syscall_unlink(path)                syscall1(__NR_unlink, (long)(path))
#define __syscall_getpid()                    syscall0(__NR_getpid)
#define __syscall_kill(pid,sig)               syscall2(__NR_kill, (pid), (sig))
#define __syscall_sigaction(sig,new,old)      syscall4(__NR_rt_sigaction, (sig), (long)(new), (long)(old), SYSCALL_SIGSET_SIZE)
#define __syscall_ioctl(fd,ioc,arg)           syscall3(__NR_ioctl, (fd), (ioc), (long)(arg))
#define __syscall_exit(code)                  syscall1(__NR_exit, code)

#define __NEED_off_t
#include <bits/alltypes.h>

static inline off_t __syscall_lseek(int fd, off_t offset, int whence)
{
	return syscall3(__NR_lseek, fd, offset, whence);
}

#endif