syscall.h

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#ifndef QUIC_SYS_SYSCALL_H
#define QUIC_SYS_SYSCALL_H

 
typedef unsigned long  u64; 
typedef long           i64; 
typedef unsigned int   u32; 
typedef int            i32; 
typedef unsigned short u16; 
typedef unsigned char  u8;  
typedef i64            ssz; 
typedef u64            usz; 
 
#define SYS_read 0                
#define SYS_write 1               
#define SYS_close 3               
#define SYS_newfstatat 262        
#define SYS_pread64 17            
#define SYS_mmap 9                
#define SYS_mprotect 10           
#define SYS_munmap 11             
#define SYS_rt_sigaction 13       
#define SYS_rt_sigprocmask 14     
#define SYS_rt_sigreturn 15       
#define SYS_socket 41             
#define SYS_sendmsg 46            
#define SYS_sendto 44             
#define SYS_recvfrom 45           
#define SYS_bind 49               
#define SYS_recvmmsg 299          
#define SYS_setsockopt 54         
#define SYS_clone 56              
#define SYS_exit 60               
#define SYS_gettid 186            
#define SYS_futex 202             
#define SYS_sched_setaffinity 203 
#define SYS_sched_getaffinity 204 
#define SYS_clock_gettime 228     
#define SYS_openat 257            
#define SYS_mkdirat 258           
#define SYS_getrandom 318         
#define SYS_fork 57               
#define SYS_wait4 61              
#define SYS_exit_group 231        

#define SIGTERM 15 

#define SA_RESTORER 0x04000000u

static inline i64 syscall6(i64 n, i64 a, i64 b, i64 c, i64 d, i64 e, i64 f) {
  i64          ret;
  register i64 r10 __asm__("r10") = d;
  register i64 r8 __asm__("r8")   = e;
  register i64 r9 __asm__("r9")   = f;
  __asm__ volatile("syscall"
                   : "=a"(ret)
                   : "a"(n), "D"(a), "S"(b), "d"(c), "r"(r10), "r"(r8), "r"(r9)
                   : "rcx", "r11", "memory");
  return ret;
}

#define syscall2(n, a, b) syscall6((n), (i64)(a), (i64)(b), 0, 0, 0, 0)
#define syscall3(n, a, b, c) \
  syscall6((n), (i64)(a), (i64)(b), (i64)(c), 0, 0, 0)

#define syscall4(n, a, b, c, d) \
  syscall6((n), (i64)(a), (i64)(b), (i64)(c), (i64)(d), 0, 0)

#define syscall5(n, a, b, c, d, e) \
  syscall6((n), (i64)(a), (i64)(b), (i64)(c), (i64)(d), (i64)(e), 0)

#define syscall1(n, a) syscall6((n), (i64)(a), 0, 0, 0, 0, 0)
 
#endif