Import of Linux/MIPS 2.1.14

1 files changed, 219 insertions, 24 deletions

diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index 84196ac9e..403f481a3 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -1,6 +1,188 @@
 #ifndef _ASM_I386_UNISTD_H_
 #define _ASM_I386_UNISTD_H_
 
+/*
+ * 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
+#define __NR_vhangup		111
+#define __NR_idle		112
+#define __NR_vm86		113
+#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_modify_ldt		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-i386/errno.h> */
+
+#define __syscall_return(type, res) \
+do { \
+	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
+		errno = -(res); \
+		res = -1; \
+	} \
+	return (type) (res); \
+} while (0)
+
 /* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
 #define _syscall0(type,name) \
 type name(void) \
@@ -9,10 +191,7 @@ long __res; \
 __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name)); \
-if (__res >= 0) \
-	return (type) __res; \
-errno = -__res; \
-return -1; \
+__syscall_return(type,__res); \
 }
 
 #define _syscall1(type,name,type1,arg1) \
@@ -22,10 +201,7 @@ long __res; \
 __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name),"b" ((long)(arg1))); \
-if (__res >= 0) \
-	return (type) __res; \
-errno = -__res; \
-return -1; \
+__syscall_return(type,__res); \
 }
 
 #define _syscall2(type,name,type1,arg1,type2,arg2) \
@@ -35,10 +211,7 @@ long __res; \
 __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
-if (__res >= 0) \
-	return (type) __res; \
-errno = -__res; \
-return -1; \
+__syscall_return(type,__res); \
 }
 
 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
@@ -49,10 +222,7 @@ __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
 		  "d" ((long)(arg3))); \
-if (__res>=0) \
-	return (type) __res; \
-errno=-__res; \
-return -1; \
+__syscall_return(type,__res); \
 }
 
 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
@@ -63,10 +233,7 @@ __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
 	  "d" ((long)(arg3)),"S" ((long)(arg4))); \
-if (__res>=0) \
-	return (type) __res; \
-errno=-__res; \
-return -1; \
+__syscall_return(type,__res); \
 } 
 
 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
@@ -78,10 +245,7 @@ __asm__ volatile ("int $0x80" \
 	: "=a" (__res) \
 	: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
 	  "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
-if (__res>=0) \
-	return (type) __res; \
-errno=-__res; \
-return -1; \
+__syscall_return(type,__res); \
 }
 
 #ifdef __KERNEL_SYSCALLS__
@@ -101,6 +265,7 @@ return -1; \
 #define __NR__exit __NR_exit
 static inline _syscall0(int,idle)
 static inline _syscall0(int,fork)
+static inline _syscall2(int,clone,unsigned long,flags,char *,esp)
 static inline _syscall0(int,pause)
 static inline _syscall0(int,setup)
 static inline _syscall0(int,sync)
@@ -118,6 +283,36 @@ static inline pid_t wait(int * wait_stat)
 	return waitpid(-1,wait_stat,0);
 }
 
+/*
+ * 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)
+{
+	long retval;
+
+	__asm__ __volatile__(
+		"movl %%esp,%%esi\n\t"
+		"int $0x80\n\t"		/* Linux/i386 system call */
+		"cmpl %%esp,%%esi\n\t"	/* child or parent? */
+		"je 1f\n\t"		/* parent - jump */
+		"pushl %3\n\t"		/* push argument */
+		"call *%4\n\t"		/* call fn */
+		"movl %2,%0\n\t"	/* exit */
+		"int $0x80\n"
+		"1:\t"
+		:"=a" (retval)
+		:"0" (__NR_clone), "i" (__NR_exit),
+		 "r" (arg), "r" (fn),
+		 "b" (flags | CLONE_VM)
+		:"si");
+	return retval;
+}
+
 #endif
 
 #endif /* _ASM_I386_UNISTD_H_ */