/*
* 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 */
