scall_n32.s

来自「linux-2.4.29操作系统的源码」· S 代码 · 共 359 行

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/* * 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  5NESTED(handle_sysn32, PT_SIZE, sp)#ifndef CONFIG_MIPS32_O32	.set	noat	SAVE_SOME	STI	.set	at#endif	subu	t0, v0, __NR_N32_Linux	# check syscall number	sltiu	t0, t0,	__NR_N32_Linux_syscalls + 1#ifndef CONFIG_MIPS32_O32	ld	t1, PT_EPC(sp)		# skip syscall on return	daddiu	t1, 4			# skip to next instruction	sd	t1, PT_EPC(sp)#endif	beqz	t0, not_n32_scall	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 restarting1:	sd	v0, PT_R2(sp)		# resultret_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_returnrestore_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_alln32_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 restarting1:	sd	v0, PT_R2(sp)		# result	jal	syscall_trace	j	ret_from_sys_callnot_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	sys32_create_module	PTR	sys32_init_module	PTR	sys32_delete_module	PTR	sys32_get_kernel_syms		/* 6170 */	PTR	sys32_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_ni_syscall	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_semtimedop			/* 6215 */	PTR	sys_ni_syscall	PTR	sys_ni_syscall	PTR	sys_ni_syscall	PTR	sys_sendfile64

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