/* * include/asm-xtensa/unistd.h * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. */ #ifndef _XTENSA_UNISTD_H #define _XTENSA_UNISTD_H #include <linux/linkage.h> #define __NR_spill 0 #define __NR_exit 1 #define __NR_read 3 #define __NR_write 4 #define __NR_open 5 #define __NR_close 6 #define __NR_creat 8 #define __NR_link 9 #define __NR_unlink 10 #define __NR_execve 11 #define __NR_chdir 12 #define __NR_mknod 14 #define __NR_chmod 15 #define __NR_lchown 16 #define __NR_break 17 #define __NR_lseek 19 #define __NR_getpid 20 #define __NR_mount 21 #define __NR_setuid 23 #define __NR_getuid 24 #define __NR_ptrace 26 #define __NR_utime 30 #define __NR_stty 31 #define __NR_gtty 32 #define __NR_access 33 #define __NR_ftime 35 #define __NR_sync 36 #define __NR_kill 37 #define __NR_rename 38 #define __NR_mkdir 39 #define __NR_rmdir 40 #define __NR_dup 41 #define __NR_pipe 42 #define __NR_times 43 #define __NR_prof 44 #define __NR_brk 45 #define __NR_setgid 46 #define __NR_getgid 47 #define __NR_signal 48 #define __NR_geteuid 49 #define __NR_getegid 50 #define __NR_acct 51 #define __NR_lock 53 #define __NR_ioctl 54 #define __NR_fcntl 55 #define __NR_setpgid 57 #define __NR_ulimit 58 #define __NR_umask 60 #define __NR_chroot 61 #define __NR_ustat 62 #define __NR_dup2 63 #define __NR_getppid 64 #define __NR_setsid 66 #define __NR_sigaction 67 #define __NR_setreuid 70 #define __NR_setregid 71 #define __NR_sigsuspend 72 #define __NR_sigpending 73 #define __NR_sethostname 74 #define __NR_setrlimit 75 #define __NR_getrlimit 76 /* Back compatible 2Gig limited rlimit */ #define __NR_getrusage 77 #define __NR_gettimeofday 78 #define __NR_settimeofday 79 #define __NR_getgroups 80 #define __NR_setgroups 81 #define __NR_select 82 #define __NR_symlink 83 #define __NR_readlink 85 #define __NR_uselib 86 #define __NR_swapon 87 #define __NR_reboot 88 #define __NR_munmap 91 #define __NR_truncate 92 #define __NR_ftruncate 93 #define __NR_fchmod 94 #define __NR_fchown 95 #define __NR_getpriority 96 #define __NR_setpriority 97 #define __NR_profil 98 #define __NR_statfs 99 #define __NR_fstatfs 100 #define __NR_ioperm 101 #define __NR_syslog 103 #define __NR_setitimer 104 #define __NR_getitimer 105 #define __NR_stat 106 #define __NR_lstat 107 #define __NR_fstat 108 #define __NR_iopl 110 #define __NR_vhangup 111 #define __NR_idle 112 #define __NR_wait4 114 #define __NR_swapoff 115 #define __NR_sysinfo 116 #define __NR_fsync 118 #define __NR_sigreturn 119 #define __NR_clone 120 #define __NR_setdomainname 121 #define __NR_uname 122 #define __NR_modify_ldt 123 #define __NR_adjtimex 124 #define __NR_mprotect 125 #define __NR_create_module 127 #define __NR_init_module 128 #define __NR_delete_module 129 #define __NR_quotactl 131 #define __NR_getpgid 132 #define __NR_fchdir 133 #define __NR_bdflush 134 #define __NR_sysfs 135 #define __NR_personality 136 #define __NR_setfsuid 138 #define __NR_setfsgid 139 #define __NR__llseek 140 #define __NR_getdents 141 #define __NR__newselect 142 #define __NR_flock 143 #define __NR_msync 144 #define __NR_readv 145 #define __NR_writev 146 #define __NR_cacheflush 147 #define __NR_cachectl 148 #define __NR_sysxtensa 149 #define __NR_sysdummy 150 #define __NR_getsid 151 #define __NR_fdatasync 152 #define __NR__sysctl 153 #define __NR_mlock 154 #define __NR_munlock 155 #define __NR_mlockall 156 #define __NR_munlockall 157 #define __NR_sched_setparam 158 #define __NR_sched_getparam 159 #define __NR_sched_setscheduler 160 #define __NR_sched_getscheduler 161 #define __NR_sched_yield 162 #define __NR_sched_get_priority_max 163 #define __NR_sched_get_priority_min 164 #define __NR_sched_rr_get_interval 165 #define __NR_nanosleep 166 #define __NR_mremap 167 #define __NR_accept 168 #define __NR_bind 169 #define __NR_connect 170 #define __NR_getpeername 171 #define __NR_getsockname 172 #define __NR_getsockopt 173 #define __NR_listen 174 #define __NR_recv 175 #define __NR_recvfrom 176 #define __NR_recvmsg 177 #define __NR_send 178 #define __NR_sendmsg 179 #define __NR_sendto 180 #define __NR_setsockopt 181 #define __NR_shutdown 182 #define __NR_socket 183 #define __NR_socketpair 184 #define __NR_setresuid 185 #define __NR_getresuid 186 #define __NR_query_module 187 #define __NR_poll 188 #define __NR_nfsservctl 189 #define __NR_setresgid 190 #define __NR_getresgid 191 #define __NR_prctl 192 #define __NR_rt_sigreturn 193 #define __NR_rt_sigaction 194 #define __NR_rt_sigprocmask 195 #define __NR_rt_sigpending 196 #define __NR_rt_sigtimedwait 197 #define __NR_rt_sigqueueinfo 198 #define __NR_rt_sigsuspend 199 #define __NR_pread 200 #define __NR_pwrite 201 #define __NR_chown 202 #define __NR_getcwd 203 #define __NR_capget 204 #define __NR_capset 205 #define __NR_sigaltstack 206 #define __NR_sendfile 207 #define __NR_mmap2 210 #define __NR_truncate64 211 #define __NR_ftruncate64 212 #define __NR_stat64 213 #define __NR_lstat64 214 #define __NR_fstat64 215 #define __NR_pivot_root 216 #define __NR_mincore 217 #define __NR_madvise 218 #define __NR_getdents64 219 /* Keep this last; should always equal the last valid call number. */ #define __NR_Linux_syscalls 220 /* user-visible error numbers are in the range -1 - -125: see * <asm-xtensa/errno.h> */ #define SYSXTENSA_RESERVED 0 /* don't use this */ #define SYSXTENSA_ATOMIC_SET 1 /* set variable */ #define SYSXTENSA_ATOMIC_EXG_ADD 2 /* exchange memory and add */ #define SYSXTENSA_ATOMIC_ADD 3 /* add to memory */ #define SYSXTENSA_ATOMIC_CMP_SWP 4 /* compare and swap */ #define SYSXTENSA_COUNT 5 /* count of syscall0 functions*/ #ifdef __KERNEL__ #define __syscall_return(type, res) return ((type)(res)) #else #define __syscall_return(type, res) \ do { \ if ((unsigned long)(res) >= (unsigned long)(-125)) { \ /* Avoid using "res" which is declared to be in register r2; \ * errno might expand to a function call and clobber it. */ \ int __err = -(res); \ errno = __err; \ res = -1; \ } \ return (type) (res); \ } while (0) #endif /* Tensilica's xt-xcc compiler is much more agressive at code * optimization than gcc. Multiple __asm__ statements are * insufficient for xt-xcc because subsequent optimization passes * (beyond the front-end that knows of __asm__ statements and other * such GNU Extensions to C) can modify the register selection for * containment of C variables. * * xt-xcc cannot modify the contents of a single __asm__ statement, so * we create single-asm versions of the syscall macros that are * suitable and optimal for both xt-xcc and gcc. * * Linux takes system-call arguments in registers. The following * design is optimized for user-land apps (e.g., glibc) which * typically have a function wrapper around the "syscall" assembly * instruction. It satisfies the Xtensa ABI while minizing argument * shifting. * * The Xtensa ABI and software conventions require the system-call * number in a2. If an argument exists in a2, we move it to the next * available register. Note that for improved efficiency, we do NOT * shift all parameters down one register to maintain the original * order. * * At best case (zero arguments), we just write the syscall number to * a2. At worst case (1 to 6 arguments), we move the argument in a2 * to the next available register, then write the syscall number to * a2. * * For clarity, the following truth table enumerates all possibilities. * * arguments syscall number arg0, arg1, arg2, arg3, arg4, arg5 * --------- -------------- ---------------------------------- * 0 a2 * 1 a2 a3 * 2 a2 a4, a3 * 3 a2 a5, a3, a4 * 4 a2 a6, a3, a4, a5 * 5 a2 a7, a3, a4, a5, a6 * 6 a2 a8, a3, a4, a5, a6, a7 */ #define _syscall0(type,name) \ type name(void) \ { \ long __res; \ __asm__ __volatile__ ( \ " movi a2, %1 \n" \ " syscall \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name) \ : "a2" \ ); \ __syscall_return(type,__res); \ } #define _syscall1(type,name,type0,arg0) \ type name(type0 arg0) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a3, %2 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0) \ : "a2", "a3" \ ); \ __syscall_return(type,__res); \ } #define _syscall2(type,name,type0,arg0,type1,arg1) \ type name(type0 arg0,type1 arg1) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a4, %2 \n" \ " mov a3, %3 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0), "a" (arg1) \ : "a2", "a3", "a4" \ ); \ __syscall_return(type,__res); \ } #define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \ type name(type0 arg0,type1 arg1,type2 arg2) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a5, %2 \n" \ " mov a4, %4 \n" \ " mov a3, %3 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \ : "a2", "a3", "a4", "a5" \ ); \ __syscall_return(type,__res); \ } #define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \ type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a6, %2 \n" \ " mov a5, %5 \n" \ " mov a4, %4 \n" \ " mov a3, %3 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \ : "a2", "a3", "a4", "a5", "a6" \ ); \ __syscall_return(type,__res); \ } /* Note that we save and restore the a7 frame pointer. * Including a7 in the clobber list doesn't do what you'd expect. */ #define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \ type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a9, a7 \n" \ " mov a7, %2 \n" \ " mov a6, %6 \n" \ " mov a5, %5 \n" \ " mov a4, %4 \n" \ " mov a3, %3 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov a7, a9 \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \ "a" (arg3), "a" (arg4) \ : "a2", "a3", "a4", "a5", "a6", "a9" \ ); \ __syscall_return(type,__res); \ } /* Note that we save and restore the a7 frame pointer. * Including a7 in the clobber list doesn't do what you'd expect. */ #define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \ type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \ { \ long __res; \ __asm__ __volatile__ ( \ " mov a9, a7 \n" \ " mov a8, %2 \n" \ " mov a7, %7 \n" \ " mov a6, %6 \n" \ " mov a5, %5 \n" \ " mov a4, %4 \n" \ " mov a3, %3 \n" \ " movi a2, %1 \n" \ " syscall \n" \ " mov a7, a9 \n" \ " mov %0, a2 \n" \ : "=a" (__res) \ : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \ "a" (arg3), "a" (arg4), "a" (arg5) \ : "a2", "a3", "a4", "a5", "a6", "a8", "a9" \ ); \ __syscall_return(type,__res); \ } #ifdef __KERNEL_SYSCALLS__ static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp) #endif /* * "Conditional" syscalls * * What we want is __attribute__((weak,alias("sys_ni_syscall"))), * but it doesn't work on all toolchains, so we just do it by hand */ #define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall"); #ifdef __KERNEL__ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_UTIME #define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_RT_SIGACTION #endif #endif /* _XTENSA_UNISTD_H */