patch-2.3.48 linux/arch/mips64/kernel/scall_64.S

• Lines: 348
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/arch/mips64/kernel/scall_64.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/arch/mips64/kernel/scall_64.S linux/arch/mips64/kernel/scall_64.S
@@ -0,0 +1,347 @@
+/* $Id: scall_64.S,v 1.7 2000/02/23 00:41:00 ralf Exp $
+ *
+ * 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) 1995, 1996, 1997, 1998, 1999 by Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/config.h>
+#include <asm/asm.h>
+#include <linux/errno.h>
+#include <asm/current.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/unistd.h>
+
+/* This duplicates the definition from <linux/sched.h> */
+#define PF_TRACESYS	0x00000020	/* tracing system calls */
+
+/* This duplicates the definition from <asm/signal.h> */
+#define SIGILL		4		/* Illegal instruction (ANSI).  */
+
+/* Highest syscall handled here.  */
+#define MAX_SYSCALL_NO	__NR_Linux + __NR_Linux_syscalls
+
+#ifndef CONFIG_MIPS32_COMPAT
+#define handle_sys64 handle_sys
+#endif
+
+	.align  5
+NESTED(handle_sys64, PT_SIZE, sp)
+/* When 32-bit compatibility is configured scall_o32.S already did this.  */
+#ifndef CONFIG_MIPS32_COMPAT
+	.set	noat
+	SAVE_SOME
+	.set	at
+#endif
+	ld	t1, PT_EPC(sp)		# skip syscall on return
+
+	sltiu	t0, v0, MAX_SYSCALL_NO + 1 # check syscall number
+	daddiu	t1, 4			# skip to next instruction
+	beqz	t0, illegal_syscall
+	sd	t1, PT_EPC(sp)
+
+	dsll	t0, v0, 3
+	ld	t2, (sys_call_table - (__NR_Linux * 8))(t0) # syscall routine
+	beqz	t2, illegal_syscall;
+
+	sd	a3, PT_R26(sp)		# save a3 for syscall restarting
+
+	ld	t0, TASK_FLAGS($28)	# syscall tracing enabled?
+	andi	t0, PF_TRACESYS
+	bnez	t0, trace_a_syscall
+
+	jalr	t2			# Do The Real Thing (TM)
+
+	li	t0, -EMAXERRNO - 1	# error?
+	sltu	t0, t0, v0
+	sd	t0, PT_R7(sp)		# set error flag
+	beqz	t0, 1f
+
+	negu	v0			# error
+	sd	v0, PT_R0(sp)		# set flag for syscall restarting
+1:	sd	v0, PT_R2(sp)		# result
+
+FEXPORT(ret_from_sys_call_64)
+	lw	t0, softirq_state
+	lw	t1, softirq_state+4	# unused delay slot
+	and	t0, t1
+	bnez	t0, handle_softirq_64
+
+9:	ld	t0, PT_STATUS(sp)	# returning to kernel mode?
+	andi	t1, t0, 0x10
+	ld	t2, TASK_NEED_RESCHED($28)
+	beqz	t1, return_64		# -> yes
+	bnez	t2, reschedule_64
+	lw	v0, TASK_SIGPENDING($28)
+	move	a0, zero
+	beqz	v0, return_64
+	move	a1, sp
+	SAVE_STATIC
+	jal	do_signal
+
+return_64:
+	RESTORE_SOME
+	RESTORE_SP
+	.set	mips3
+	eret
+	.set	mips0
+
+handle_softirq_64:
+	jal	do_softirq
+	b	9b
+reschedule_64:
+	SAVE_STATIC
+	jal	schedule
+	b	ret_from_sys_call_64
+
+/* ------------------------------------------------------------------------ */
+
+trace_a_syscall:
+	SAVE_STATIC
+	sd	t2,PT_R1(sp)
+	jal	syscall_trace
+	ld	t2,PT_R1(sp)
+
+	ld	a0, PT_R4(sp)		# Restore argument registers
+	ld	a1, PT_R5(sp)
+	ld	a2, PT_R6(sp)
+	ld	a3, PT_R7(sp)
+	jalr	t2
+
+	li	t0, -EMAXERRNO - 1	# error?
+	sltu	t0, t0, v0
+	sd	t0, PT_R7(sp)		# set error flag
+	beqz	t0, 1f
+
+	negu	v0			# error
+	sd	v0, PT_R0(sp)		# set flag for syscall restarting
+1:	sd	v0, PT_R2(sp)		# result
+
+	jal	syscall_trace
+	j	ret_from_sys_call
+
+illegal_syscall:
+	/* This also isn't a 64-bit syscall, throw an error.  */
+	li	v0, ENOSYS			# error
+	sd	v0, PT_R2(sp)
+	li	t0, 1				# set error flag
+	sd	t0, PT_R7(sp)
+	j	ret_from_sys_call
+	END(handle_sys64)
+
+sys_call_table:
+	PTR	sys_syscall				/* 4000 */
+	PTR	sys_exit
+	PTR	sys_fork
+	PTR	sys_read
+	PTR	sys_write
+	PTR	sys_open				/* 4005 */
+	PTR	sys_close
+	PTR	sys_waitpid
+	PTR	sys_creat
+	PTR	sys_link
+	PTR	sys_unlink				/* 4010 */
+	PTR	sys_execve
+	PTR	sys_chdir
+	PTR	sys_time
+	PTR	sys_mknod
+	PTR	sys_chmod				/* 4015 */
+	PTR	sys_lchown
+	PTR	sys_ni_syscall
+	PTR	sys_stat
+	PTR	sys_lseek
+	PTR	sys_getpid				/* 4020 */
+	PTR	sys_mount
+	PTR	sys_oldumount
+	PTR	sys_setuid
+	PTR	sys_getuid
+	PTR	sys_stime				/* 4025 */
+	PTR	sys_ni_syscall		/* ptrace */
+	PTR	sys_alarm
+	PTR	sys_fstat
+	PTR	sys_ni_syscall
+	PTR	sys_utime				/* 4030 */
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_access
+	PTR	sys_nice
+	PTR	sys_ni_syscall				/* 4035 */
+	PTR	sys_sync
+	PTR	sys_kill
+	PTR	sys_rename
+	PTR	sys_mkdir
+	PTR	sys_rmdir				/* 4040 */
+	PTR	sys_dup
+	PTR	sys_pipe
+	PTR	sys_times
+	PTR	sys_ni_syscall
+	PTR	sys_brk					/* 4045 */
+	PTR	sys_setgid
+	PTR	sys_getgid
+	PTR	sys_ni_syscall		/* was signal	2 */
+	PTR	sys_geteuid
+	PTR	sys_getegid				/* 4050 */
+	PTR	sys_acct
+	PTR	sys_umount
+	PTR	sys_ni_syscall
+	PTR	sys_ioctl
+	PTR	sys_fcntl				/* 4055 */
+	PTR	sys_ni_syscall
+	PTR	sys_setpgid
+	PTR	sys_ni_syscall
+	PTR	sys_olduname
+	PTR	sys_umask				/* 4060 */
+	PTR	sys_chroot
+	PTR	sys_ustat
+	PTR	sys_dup2
+	PTR	sys_getppid
+	PTR	sys_getpgrp				/* 4065 */
+	PTR	sys_setsid
+	PTR	sys_sigaction
+	PTR	sys_sgetmask
+	PTR	sys_ssetmask
+	PTR	sys_setreuid				/* 4070 */
+	PTR	sys_setregid
+	PTR	sys_sigsuspend
+	PTR	sys_sigpending
+	PTR	sys_sethostname
+	PTR	sys_setrlimit				/* 4075 */
+	PTR	sys_getrlimit
+	PTR	sys_getrusage
+	PTR	sys_gettimeofday
+	PTR	sys_settimeofday
+	PTR	sys_getgroups				/* 4080 */
+	PTR	sys_setgroups
+	PTR	sys_ni_syscall			/* old_select */
+	PTR	sys_symlink
+	PTR	sys_lstat
+	PTR	sys_readlink				/* 4085 */
+	PTR	sys_uselib
+	PTR	sys_swapon
+	PTR	sys_reboot
+	PTR	old_readdir
+	PTR	sys_mmap				/* 4090 */
+	PTR	sys_munmap
+	PTR	sys_truncate
+	PTR	sys_ftruncate
+	PTR	sys_fchmod
+	PTR	sys_fchown				/* 4095 */
+	PTR	sys_getpriority
+	PTR	sys_setpriority
+	PTR	sys_ni_syscall
+	PTR	sys_statfs
+	PTR	sys_fstatfs				/* 4100 */
+	PTR	sys_ni_syscall		/* sys_ioperm */
+	PTR	sys_socketcall
+	PTR	sys_syslog
+	PTR	sys_setitimer
+	PTR	sys_getitimer				/* 4105 */
+	PTR	sys_newstat
+	PTR	sys_newlstat
+	PTR	sys_newfstat
+	PTR	sys_uname
+	PTR	sys_ni_syscall		/* sys_ioperm  *//* 4110 */
+	PTR	sys_vhangup
+	PTR	sys_ni_syscall		/* was sys_idle	 */
+	PTR	sys_ni_syscall		/* sys_vm86 */
+	PTR	sys_wait4
+	PTR	sys_swapoff				/* 4115 */
+	PTR	sys_sysinfo
+	PTR	sys_ipc
+	PTR	sys_fsync
+	PTR	sys_sigreturn
+	PTR	sys_clone				/* 4120 */
+	PTR	sys_setdomainname
+	PTR	sys_newuname
+	PTR	sys_ni_syscall		/* sys_modify_ldt */
+	PTR	sys_adjtimex
+	PTR	sys_mprotect				/* 4125 */
+	PTR	sys_sigprocmask
+	PTR	sys_create_module
+	PTR	sys_init_module
+	PTR	sys_delete_module
+	PTR	sys_get_kernel_syms 			/* 4130 */
+	PTR	sys_quotactl
+	PTR	sys_getpgid
+	PTR	sys_fchdir
+	PTR	sys_bdflush
+	PTR	sys_sysfs				/* 4135 */
+	PTR	sys_personality
+	PTR	sys_ni_syscall		/* for afs_syscall */
+	PTR	sys_setfsuid
+	PTR	sys_setfsgid
+	PTR	sys_llseek				/* 4140 */
+	PTR	sys_getdents
+	PTR	sys_select
+	PTR	sys_flock
+	PTR	sys_msync
+	PTR	sys_readv				/* 4145 */
+	PTR	sys_writev
+	PTR	sys_cacheflush
+	PTR	sys_cachectl
+	PTR	sys_sysmips
+	PTR	sys_ni_syscall				/* 4150 */
+	PTR	sys_getsid
+	PTR	sys_fdatasync
+	PTR	sys_sysctl
+	PTR	sys_mlock
+	PTR	sys_munlock				/* 4155 */
+	PTR	sys_mlockall
+	PTR	sys_munlockall
+	PTR	sys_sched_setparam
+	PTR	sys_sched_getparam
+	PTR	sys_sched_setscheduler			/* 4160 */
+	PTR	sys_sched_getscheduler
+	PTR	sys_sched_yield
+	PTR	sys_sched_get_priority_max
+	PTR	sys_sched_get_priority_min
+	PTR	sys_sched_rr_get_interval		/* 4165 */
+	PTR	sys_nanosleep
+	PTR	sys_mremap
+	PTR	sys_accept
+	PTR	sys_bind
+	PTR	sys_connect				/* 4170 */
+	PTR	sys_getpeername
+	PTR	sys_getsockname
+	PTR	sys_getsockopt
+	PTR	sys_listen
+	PTR	sys_recv				/* 4175 */
+	PTR	sys_recvfrom
+	PTR	sys_recvmsg
+	PTR	sys_send
+	PTR	sys_sendmsg
+	PTR	sys_sendto				/* 4180 */
+	PTR	sys_setsockopt
+	PTR	sys_shutdown
+	PTR	sys_socket
+	PTR	sys_socketpair
+	PTR	sys_setresuid				/* 4185 */
+	PTR	sys_getresuid
+	PTR	sys_query_module
+	PTR	sys_poll
+	PTR	sys_nfsservctl
+	PTR	sys_setresgid				/* 4190 */
+	PTR	sys_getresgid
+	PTR	sys_prctl
+	PTR	sys_rt_sigreturn
+	PTR	sys_rt_sigaction
+	PTR	sys_rt_sigprocmask 			/* 4195 */
+	PTR	sys_rt_sigpending
+	PTR	sys_rt_sigtimedwait
+	PTR	sys_rt_sigqueueinfo
+	PTR	sys_rt_sigsuspend
+	PTR	sys_pread				/* 4200 */
+	PTR	sys_pwrite
+	PTR	sys_chown
+	PTR	sys_getcwd
+	PTR	sys_capget
+	PTR	sys_capset				/* 4205 */
+	PTR	sys_sigaltstack
+	PTR	sys_sendfile
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_pivot_root				/* 4210 */