1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c 4*4882a593Smuzhiyun * with some changes for UML. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <linux/linkage.h> 8*4882a593Smuzhiyun #include <linux/sys.h> 9*4882a593Smuzhiyun #include <linux/cache.h> 10*4882a593Smuzhiyun #include <asm/unistd.h> 11*4882a593Smuzhiyun #include <asm/syscall.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #define __NO_STUBS 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* 16*4882a593Smuzhiyun * Below you can see, in terms of #define's, the differences between the x86-64 17*4882a593Smuzhiyun * and the UML syscall table. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun /* Not going to be implemented by UML, since we have no hardware. */ 21*4882a593Smuzhiyun #define sys_iopl sys_ni_syscall 22*4882a593Smuzhiyun #define sys_ioperm sys_ni_syscall 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* 25*4882a593Smuzhiyun * The UML TLS problem. Note that x86_64 does not implement this, so the below 26*4882a593Smuzhiyun * is needed only for the ia32 compatibility. 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* On UML we call it this way ("old" means it's not mmap2) */ 30*4882a593Smuzhiyun #define sys_mmap old_mmap 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define stub_clone sys_clone 33*4882a593Smuzhiyun #define stub_fork sys_fork 34*4882a593Smuzhiyun #define stub_vfork sys_vfork 35*4882a593Smuzhiyun #define stub_execve sys_execve 36*4882a593Smuzhiyun #define stub_execveat sys_execveat 37*4882a593Smuzhiyun #define stub_rt_sigreturn sys_rt_sigreturn 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun #define __SYSCALL_X32(nr, sym) 40*4882a593Smuzhiyun #define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define __SYSCALL_64(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ; 43*4882a593Smuzhiyun #include <asm/syscalls_64.h> 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #undef __SYSCALL_64 46*4882a593Smuzhiyun #define __SYSCALL_64(nr, sym) [ nr ] = sym, 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = { 51*4882a593Smuzhiyun /* 52*4882a593Smuzhiyun * Smells like a compiler bug -- it doesn't work 53*4882a593Smuzhiyun * when the & below is removed. 54*4882a593Smuzhiyun */ 55*4882a593Smuzhiyun [0 ... __NR_syscall_max] = &sys_ni_syscall, 56*4882a593Smuzhiyun #include <asm/syscalls_64.h> 57*4882a593Smuzhiyun }; 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun int syscall_table_size = sizeof(sys_call_table); 60