| /* |
| * 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 */ |
