Import of Linux/MIPS 2.1.14

1 files changed, 308 insertions, 78 deletions

diff --git a/include/asm-m68k/unistd.h b/include/asm-m68k/unistd.h
index acad643bf..b55f296a7 100644
--- a/include/asm-m68k/unistd.h
+++ b/include/asm-m68k/unistd.h
@@ -1,114 +1,344 @@
 #ifndef _ASM_M68K_UNISTD_H_
 #define _ASM_M68K_UNISTD_H_
 
-/* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
+/*
+ * This file contains the system call numbers.
+ */
+
+#define __NR_setup		  0	/* used only by init, to get system going */
+#define __NR_exit		  1
+#define __NR_fork		  2
+#define __NR_read		  3
+#define __NR_write		  4
+#define __NR_open		  5
+#define __NR_close		  6
+#define __NR_waitpid		  7
+#define __NR_creat		  8
+#define __NR_link		  9
+#define __NR_unlink		 10
+#define __NR_execve		 11
+#define __NR_chdir		 12
+#define __NR_time		 13
+#define __NR_mknod		 14
+#define __NR_chmod		 15
+#define __NR_chown		 16
+#define __NR_break		 17
+#define __NR_oldstat		 18
+#define __NR_lseek		 19
+#define __NR_getpid		 20
+#define __NR_mount		 21
+#define __NR_umount		 22
+#define __NR_setuid		 23
+#define __NR_getuid		 24
+#define __NR_stime		 25
+#define __NR_ptrace		 26
+#define __NR_alarm		 27
+#define __NR_oldfstat		 28
+#define __NR_pause		 29
+#define __NR_utime		 30
+#define __NR_stty		 31
+#define __NR_gtty		 32
+#define __NR_access		 33
+#define __NR_nice		 34
+#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_phys		 52
+#define __NR_lock		 53
+#define __NR_ioctl		 54
+#define __NR_fcntl		 55
+#define __NR_mpx		 56
+#define __NR_setpgid		 57
+#define __NR_ulimit		 58
+#define __NR_oldolduname	 59
+#define __NR_umask		 60
+#define __NR_chroot		 61
+#define __NR_ustat		 62
+#define __NR_dup2		 63
+#define __NR_getppid		 64
+#define __NR_getpgrp		 65
+#define __NR_setsid		 66
+#define __NR_sigaction		 67
+#define __NR_sgetmask		 68
+#define __NR_ssetmask		 69
+#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
+#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_oldlstat		 84
+#define __NR_readlink		 85
+#define __NR_uselib		 86
+#define __NR_swapon		 87
+#define __NR_reboot		 88
+#define __NR_readdir		 89
+#define __NR_mmap		 90
+#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_socketcall		102
+#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_olduname		109
+#define __NR_iopl		/* 110 */ not supported
+#define __NR_vhangup		111
+#define __NR_idle		112
+#define __NR_vm86		/* 113 */ not supported
+#define __NR_wait4		114
+#define __NR_swapoff		115
+#define __NR_sysinfo		116
+#define __NR_ipc		117
+#define __NR_fsync		118
+#define __NR_sigreturn		119
+#define __NR_clone		120
+#define __NR_setdomainname	121
+#define __NR_uname		122
+#define __NR_cacheflush		123
+#define __NR_adjtimex		124
+#define __NR_mprotect		125
+#define __NR_sigprocmask	126
+#define __NR_create_module	127
+#define __NR_init_module	128
+#define __NR_delete_module	129
+#define __NR_get_kernel_syms	130
+#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_afs_syscall	137 /* Syscall for Andrew File System */
+#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_getsid		147
+#define __NR_fdatasync		148
+#define __NR__sysctl		149
+#define __NR_mlock		150
+#define __NR_munlock		151
+#define __NR_mlockall		152
+#define __NR_munlockall		153
+#define __NR_sched_setparam		154
+#define __NR_sched_getparam		155
+#define __NR_sched_setscheduler		156
+#define __NR_sched_getscheduler		157
+#define __NR_sched_yield		158
+#define __NR_sched_get_priority_max	159
+#define __NR_sched_get_priority_min	160
+#define __NR_sched_rr_get_interval	161
+#define __NR_nanosleep		162
+#define __NR_mremap		163
+#define __NR_setresuid		164
+#define __NR_getresuid		165
+
+/* user-visible error numbers are in the range -1 - -122: see
+   <asm-m68k/errno.h> */
+
+#define __syscall_return(type, res) \
+do { \
+	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+		errno = -(res); \
+		res = -1; \
+	} \
+	return (type) (res); \
+} while (0)
+
 #define _syscall0(type,name) \
 type name(void) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
+register long __res __asm__ ("%d0") = __NR_##name; \
 __asm__ __volatile__ ("trap  #0" \
                       : "=g" (__res) \
-                      : "0" (__NR_##name) \
-		      : "d0"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+		      : "0" (__res) \
+		      : "%d0"); \
+__syscall_return(type,__res); \
 }
 
 #define _syscall1(type,name,atype,a) \
 type name(atype a) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
-__asm__ __volatile__ ("movel %2,d1\n\t" \
-                      "trap  #0" \
-                      : "=g" (__res) \
-                      : "0" (__NR_##name), "g" ((long)(a)) \
-                      : "d0", "d1"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+register long __res __asm__ ("%d0") = __NR_##name; \
+register long __a __asm__ ("%d1") = (long)(a); \
+__asm__ __volatile__ ("trap  #0" \
+		      : "=d" (__res) \
+		      : "0" (__res), "d" (__a) \
+		      : "%d0"); \
+__syscall_return(type,__res); \
 }
 
 #define _syscall2(type,name,atype,a,btype,b) \
 type name(atype a,btype b) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
-__asm__ __volatile__ ("movel %2,d1\n\t" \
-                      "movel %3,d2\n\t" \
-                      "trap  #0" \
-                      : "=g" (__res) \
-                      : "0" (__NR_##name), "g" ((long)(a)), \
-                                          "g" ((long)(b)) \
-                      : "d0", "d1", "d2"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+register long __res __asm__ ("%d0") = __NR_##name; \
+register long __a __asm__ ("%d1") = (long)(a); \
+register long __b __asm__ ("%d2") = (long)(b); \
+__asm__ __volatile__ ("trap  #0" \
+		      : "=d" (__res) \
+                      : "0" (__res), "d" (__a), "d" (__b) \
+		      : "%d0"); \
+__syscall_return(type,__res); \
 }
 
 #define _syscall3(type,name,atype,a,btype,b,ctype,c) \
 type name(atype a,btype b,ctype c) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
-__asm__ __volatile__ ("movel %2,d1\n\t" \
-                      "movel %3,d2\n\t" \
-                      "movel %4,d3\n\t" \
-                      "trap  #0" \
-                      : "=g" (__res) \
-                      : "0" (__NR_##name), "g" ((long)(a)), \
-                                          "g" ((long)(b)), \
-                                          "g" ((long)(c)) \
-                      : "d0", "d1", "d2", "d3"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+register long __res __asm__ ("%d0") = __NR_##name; \
+register long __a __asm__ ("%d1") = (long)(a); \
+register long __b __asm__ ("%d2") = (long)(b); \
+register long __c __asm__ ("%d3") = (long)(c); \
+__asm__ __volatile__ ("trap  #0" \
+		      : "=d" (__res) \
+                      : "0" (__res), "d" (__a), "d" (__b), \
+			"d" (__c) \
+		      : "%d0"); \
+__syscall_return(type,__res); \
 }
 
 #define _syscall4(type,name,atype,a,btype,b,ctype,c,dtype,d) \
 type name (atype a, btype b, ctype c, dtype d) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
-__asm__ __volatile__ ("movel %2,d1\n\t" \
-                      "movel %3,d2\n\t" \
-                      "movel %4,d3\n\t" \
-                      "movel %5,d4\n\t" \
-                      "trap  #0" \
-                      : "=g" (__res) \
-                      : "0" (__NR_##name), "g" ((long)(a)), \
-                                          "g" ((long)(b)), \
-                                          "g" ((long)(c)), \
-                                          "g" ((long)(d))  \
-                      : "d0", "d1", "d2", "d3", "d4"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+register long __res __asm__ ("%d0") = __NR_##name; \
+register long __a __asm__ ("%d1") = (long)(a); \
+register long __b __asm__ ("%d2") = (long)(b); \
+register long __c __asm__ ("%d3") = (long)(c); \
+register long __d __asm__ ("%d4") = (long)(d); \
+__asm__ __volatile__ ("trap  #0" \
+                      : "=d" (__res) \
+                      : "0" (__res), "d" (__a), "d" (__b), \
+			"d" (__c), "d" (__d)  \
+		      : "%d0"); \
+__syscall_return(type,__res); \
 }
 
 #define _syscall5(type,name,atype,a,btype,b,ctype,c,dtype,d,etype,e) \
 type name (atype a,btype b,ctype c,dtype d,etype e) \
 { \
-register long __res __asm__ ("d0") = __NR_##name; \
-__asm__ __volatile__ ("movel %2,d1\n\t" \
-                      "movel %3,d2\n\t" \
-                      "movel %4,d3\n\t" \
-                      "movel %5,d4\n\t" \
-                      "movel %6,d5\n\t" \
-                      "trap  #0" \
-                      : "=g" (__res) \
-                      : "0" (__NR_##name), "g" ((long)(a)), \
-                                          "g" ((long)(b)), \
-                                          "g" ((long)(c)), \
-                                          "g" ((long)(d)), \
-                                          "g" ((long)(e))  \
-                      : "d0", "d1", "d2", "d3", "d4", "d5"); \
-if (__res >= 0) \
-        return (type) __res; \
-errno = -__res; \
-return -1; \
+register long __res __asm__ ("%d0") = __NR_##name; \
+register long __a __asm__ ("%d1") = (long)(a); \
+register long __b __asm__ ("%d2") = (long)(b); \
+register long __c __asm__ ("%d3") = (long)(c); \
+register long __d __asm__ ("%d4") = (long)(d); \
+register long __e __asm__ ("%d5") = (long)(e); \
+__asm__ __volatile__ ("trap  #0" \
+		      : "=d" (__res) \
+		      : "0" (__res), "d" (__a), "d" (__b), \
+			"d" (__c), "d" (__d), "d" (__e)  \
+                      : "%d0"); \
+__syscall_return(type,__res); \
+}
+
+#ifdef __KERNEL_SYSCALLS__
+
+/*
+ * we need this inline - forking from kernel space will result
+ * in NO COPY ON WRITE (!!!), until an execve is executed. This
+ * is no problem, but for the stack. This is handled by not letting
+ * main() use the stack at all after fork(). Thus, no function
+ * calls - which means inline code for fork too, as otherwise we
+ * would use the stack upon exit from 'fork()'.
+ *
+ * Actually only pause and fork are needed inline, so that there
+ * won't be any messing with the stack from main(), but we define
+ * some others too.
+ */
+#define __NR__exit __NR_exit
+static inline _syscall0(int,idle)
+static inline _syscall0(int,fork)
+static inline _syscall2(int,clone,unsigned long,flags,char *,usp)
+static inline _syscall0(int,pause)
+static inline _syscall0(int,setup)
+static inline _syscall0(int,sync)
+static inline _syscall0(pid_t,setsid)
+static inline _syscall3(int,write,int,fd,const char *,buf,off_t,count)
+static inline _syscall1(int,dup,int,fd)
+static inline _syscall3(int,execve,const char *,file,char **,argv,char **,envp)
+static inline _syscall3(int,open,const char *,file,int,flag,int,mode)
+static inline _syscall1(int,close,int,fd)
+static inline _syscall1(int,_exit,int,exitcode)
+static inline _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
+
+/*
+ * This is the mechanism for creating a new kernel thread.
+ *
+ * NOTE! Only a kernel-only process(ie the swapper or direct descendants
+ * who haven't done an "execve()") should use this: it will work within
+ * a system call from a "real" process, but the process memory space will
+ * not be free'd until both the parent and the child have exited.
+ */
+static inline pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+	register long retval __asm__ ("d0") = __NR_clone;
+	register long clone_arg __asm__ ("d1") = flags | CLONE_VM;
+	unsigned long fs;
+
+	fs = get_fs();
+	set_fs (KERNEL_DS);
+
+	__asm__ __volatile__
+	  ("trap #0\n\t"		/* Linux/m68k system call */
+	   "tstl %0\n\t"		/* child or parent */
+	   "jne 1f\n\t"			/* parent - jump */
+	   "movel %3,%%sp@-\n\t"	/* push argument */
+	   "jsr %4@\n\t"		/* call fn */
+	   "movel %0,%%d1\n\t"		/* pass exit value */
+	   "movel %2,%0\n\t"		/* exit */
+	   "trap #0\n"
+	   "1:"
+	   : "=d" (retval)
+	   : "0" (__NR_clone), "i" (__NR_exit),
+	     "r" (arg), "a" (fn), "d" (clone_arg)
+	   : "d0");
+
+	set_fs (fs);
+	return retval;
 }
 
+static inline pid_t wait(int * wait_stat)
+{
+	return waitpid(-1,wait_stat,0);
+}
+
+#endif
+
 #endif /* _ASM_M68K_UNISTD_H_ */