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remarkable-linux/include/asm-xtensa/unistd.h
Arnd Bergmann 8759145114 [PATCH] xtensa: remove old syscalls 
xtensa is now in -rc1, with the obsolete syscalls still in there, so I
guess this about the last chance to correct the ABI.  Applying the patch
obviously breaks all sorts of user space binaries and probably also
requires the appropriate changes to be made to libc.

On the other hand, if a decision is made to keep the broken interface, it
should at least be a conscious one instead of an oversight.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-07 18:23:44 -07:00

440 lines
12 KiB
C
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/*
* 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 */
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