patch-2.4.22 linux-2.4.22/arch/mips64/kernel/scall_n32.S

• Lines: 356
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/mips64/kernel/scall_n32.S
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/mips64/kernel/scall_n32.S linux-2.4.22/arch/mips64/kernel/scall_n32.S
@@ -0,0 +1,355 @@
+/*
+ * 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, 96, 97, 98, 99, 2000, 01 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, 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 PT_TRACESYS	0x00000002	/* tracing system calls */
+
+/* This duplicates the definition from <asm/signal.h> */
+#define SIGILL		4		/* Illegal instruction (ANSI).  */
+
+#ifndef CONFIG_MIPS32_O32
+/* No O32, so define handle_sys here */
+#define handle_sysn32 handle_sys
+#endif
+
+	.align  5
+NESTED(handle_sysn32, PT_SIZE, sp)
+#ifndef CONFIG_MIPS32_O32
+	.set	noat
+	SAVE_SOME
+	STI
+	.set	at
+#endif
+	ld	t1, PT_EPC(sp)		# skip syscall on return
+
+	subu	t0, v0, __NR_N32_Linux	# check syscall number
+	sltiu	t0, t0,	__NR_N32_Linux_syscalls + 1
+	daddiu	t1, 4			# skip to next instruction
+	beqz	t0, not_n32_scall
+	sd	t1, PT_EPC(sp)
+
+	dsll	t0, v0, 3		# offset into table
+	ld	t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
+
+	sd	a3, PT_R26(sp)		# save a3 for syscall restarting
+
+	ld	t0, TASK_PTRACE($28)	# syscall tracing enabled?
+	andi	t0, PT_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
+
+ret_from_sys_call:
+	mfc0	t0, CP0_STATUS
+	xori	t0, t0, 1
+	ori	t0, t0, 1
+	mtc0	t0, CP0_STATUS
+
+	ld	t2, TASK_NEED_RESCHED($28)
+	bnez	t2, n32_reschedule
+	lw	v0, TASK_SIGPENDING($28)
+	bnez	v0, signal_return
+
+restore_all:
+	RESTORE_SOME
+	RESTORE_SP
+	eret
+
+/* Put this behind restore_all for the sake of the branch prediction.  */
+signal_return:
+	.type	signal_return, @function
+
+	mfc0	t0, CP0_STATUS
+	ori	t0, t0, 1
+	mtc0	t0, CP0_STATUS
+
+	SAVE_STATIC
+	move	a0, zero
+	move	a1, sp
+	jal	do_signal
+	RESTORE_STATIC
+	b	restore_all
+
+n32_reschedule:
+	SAVE_STATIC
+	jal	schedule
+	b	ret_from_sys_call
+
+/* ------------------------------------------------------------------------ */
+
+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
+
+not_n32_scall:
+	/* This is not an n32 compatibility syscall, pass it on to
+	   the n64 syscall handlers.  */
+	j	handle_sys64
+
+	END(handle_sysn32)
+
+EXPORT(sysn32_call_table)
+	PTR	sys_read			/* 6000 */
+	PTR	sys_write
+	PTR	sys_open
+	PTR	sys_close
+	PTR	sys_newstat
+	PTR	sys_newfstat			/* 6005 */
+	PTR	sys_newlstat
+	PTR	sys_poll
+	PTR	sys_lseek
+	PTR	sys_mmap
+	PTR	sys_mprotect			/* 6010 */
+	PTR	sys_munmap
+	PTR	sys_brk
+	PTR	sys32_rt_sigaction
+	PTR	sys32_rt_sigprocmask
+	PTR	sys32_ioctl			/* 6015 */
+	PTR	sys_pread
+	PTR	sys_pwrite
+	PTR	sys32_readv
+	PTR	sys32_writev
+	PTR	sys_access			/* 6020 */
+	PTR	sys_pipe
+	PTR	sys32_select
+	PTR	sys_sched_yield
+	PTR	sys_mremap
+	PTR	sys_msync			/* 6025 */
+	PTR	sys_mincore
+	PTR	sys_madvise
+	PTR	sys_shmget
+	PTR	sys_shmat
+	PTR	sys_shmctl			/* 6030 */
+	PTR	sys_dup
+	PTR	sys_dup2
+	PTR	sys_pause
+	PTR	sys32_nanosleep
+	PTR	sys32_getitimer			/* 6035 */
+	PTR	sys32_setitimer
+	PTR	sys_alarm
+	PTR	sys_getpid
+	PTR	sys32_sendfile
+	PTR	sys_socket			/* 6040 */
+	PTR	sys_connect
+	PTR	sys_accept
+	PTR	sys_sendto
+	PTR	sys_recvfrom
+	PTR	sys32_sendmsg			/* 6045 */
+	PTR	sys32_recvmsg
+	PTR	sys_shutdown
+	PTR	sys_bind
+	PTR	sys_listen
+	PTR	sys_getsockname			/* 6050 */
+	PTR	sys_getpeername
+	PTR	sys_socketpair
+	PTR	sys32_setsockopt
+	PTR	sys_getsockopt
+	PTR	sys_clone			/* 6055 */
+	PTR	sys_fork
+	PTR	sys32_execve
+	PTR	sys_exit
+	PTR	sys32_wait4
+	PTR	sys_kill			/* 6060 */
+	PTR	sys32_newuname
+	PTR	sys_semget
+	PTR	sys_semop
+	PTR	sys_semctl
+	PTR	sys_shmdt			/* 6065 */
+	PTR	sys_msgget
+	PTR	sys_msgsnd
+	PTR	sys_msgrcv
+	PTR	sys_msgctl
+	PTR	sys32_fcntl			/* 6070 */
+	PTR	sys_flock
+	PTR	sys_fsync
+	PTR	sys_fdatasync
+	PTR	sys_truncate
+	PTR	sys_ftruncate			/* 6075 */
+	PTR	sys32_getdents
+	PTR	sys_getcwd
+	PTR	sys_chdir
+	PTR	sys_fchdir
+	PTR	sys_rename			/* 6080 */
+	PTR	sys_mkdir
+	PTR	sys_rmdir
+	PTR	sys_creat
+	PTR	sys_link
+	PTR	sys_unlink			/* 6085 */
+	PTR	sys_symlink
+	PTR	sys_readlink
+	PTR	sys_chmod
+	PTR	sys_fchmod
+	PTR	sys_chown			/* 6090 */
+	PTR	sys_fchown
+	PTR	sys_lchown
+	PTR	sys_umask
+	PTR	sys32_gettimeofday
+	PTR	sys32_getrlimit			/* 6095 */
+	PTR	sys32_getrusage
+	PTR	sys32_sysinfo
+	PTR	sys32_times
+	PTR	sys_ptrace
+	PTR	sys_getuid			/* 6100 */
+	PTR	sys_syslog
+	PTR	sys_getgid
+	PTR	sys_setuid
+	PTR	sys_setgid
+	PTR	sys_geteuid			/* 6105 */
+	PTR	sys_getegid
+	PTR	sys_setpgid
+	PTR	sys_getppid
+	PTR	sys_getpgrp
+	PTR	sys_setsid			/* 6110 */
+	PTR	sys_setreuid
+	PTR	sys_setregid
+	PTR	sys_getgroups
+	PTR	sys_setgroups
+	PTR	sys_setresuid			/* 6115 */
+	PTR	sys_getresuid
+	PTR	sys_setresgid
+	PTR	sys_getresgid
+	PTR	sys_getpgid
+	PTR	sys_setfsuid			/* 6120 */
+	PTR	sys_setfsgid
+	PTR	sys_getsid
+	PTR	sys_capget
+	PTR	sys_capset
+	PTR	sys32_rt_sigpending		/* 6125 */
+	PTR	sys32_rt_sigtimedwait
+	PTR	sys32_rt_sigqueueinfo
+	PTR	sys32_rt_sigsuspend
+	PTR	sys32_sigaltstack
+	PTR	sys32_utime			/* 6130 */
+	PTR	sys_mknod
+	PTR	sys32_personality
+	PTR	sys_ustat
+	PTR	sys32_statfs
+	PTR	sys32_fstatfs			/* 6135 */
+	PTR	sys_sysfs
+	PTR	sys_getpriority
+	PTR	sys_setpriority
+	PTR	sys_sched_setparam
+	PTR	sys_sched_getparam		/* 6140 */
+	PTR	sys_sched_setscheduler
+	PTR	sys_sched_getscheduler
+	PTR	sys_sched_get_priority_max
+	PTR	sys_sched_get_priority_min
+	PTR	sys32_sched_rr_get_interval	/* 6145 */
+	PTR	sys_mlock
+	PTR	sys_munlock
+	PTR	sys_mlockall
+	PTR	sys_munlockall
+	PTR	sys_vhangup			/* 6150 */
+	PTR	sys_pivot_root
+	PTR	sys32_sysctl
+	PTR	sys_prctl
+	PTR	sys32_adjtimex
+	PTR	sys32_setrlimit			/* 6155 */
+	PTR	sys_chroot
+	PTR	sys_sync
+	PTR	sys_acct
+	PTR	sys32_settimeofday
+	PTR	sys_mount			/* 6160 */
+	PTR	sys_umount
+	PTR	sys_swapon
+	PTR	sys_swapoff
+	PTR	sys_reboot
+	PTR	sys_sethostname			/* 6165 */
+	PTR	sys_setdomainname
+	PTR	sys_create_module
+	PTR	sys_init_module
+	PTR	sys_delete_module
+	PTR	sys_get_kernel_syms		/* 6170 */
+	PTR	sys_query_module
+	PTR	sys_quotactl
+	PTR	sys_nfsservctl
+	PTR	sys_ni_syscall			/* res. for getpmsg */
+	PTR	sys_ni_syscall			/* 6175  for putpmsg */
+	PTR	sys_ni_syscall			/* res. for afs_syscall */
+	PTR	sys_ni_syscall			/* res. for security */
+	PTR	sys_gettid
+	PTR	sys32_readahead
+	PTR	sys_setxattr			/* 6180 */
+	PTR	sys_lsetxattr
+	PTR	sys_fsetxattr
+	PTR	sys_getxattr
+	PTR	sys_lgetxattr
+	PTR	sys_fgetxattr			/* 6185 */
+	PTR	sys_listxattr
+	PTR	sys_llistxattr
+	PTR	sys_flistxattr
+	PTR	sys_removexattr
+	PTR	sys_lremovexattr		/* 6190 */
+	PTR	sys_fremovexattr
+	PTR	sys_tkill
+	PTR	sys_time
+	PTR	sys_ni_syscall			/* res. for futex */
+	PTR	sys_ni_syscall			/* 6195 rs. sched_setaffinity */
+	PTR	sys_ni_syscall			/* res. f. sched_getaffinity */
+	PTR	sys_cacheflush
+	PTR	sys_cachectl
+	PTR	sys_sysmips
+	PTR	sys_ni_syscall			/* 6200 */
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall			/* 6205 */
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall			/* 6210 */
+	PTR	sysn32_rt_sigreturn
+	PTR	sys_fcntl
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall			/* 6215 */
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_ni_syscall
+	PTR	sys_sendfile64