entry.s

xen虚拟机源代码安装包

	.spillsp ar.unat, 16
	st8 [sp]=r9,-16				// allocate space for ar.unat and save it
	st8 [out2]=loc1,-8			// save ar.pfs, out2=&sigscratch
	.body
	br.call.sptk.many rp=ia64_rt_sigsuspend
.ret17:	.restore sp
	adds sp=16,sp				// pop scratch stack space
	;;
	ld8 r9=[sp]				// load new unat from sw->caller_unat
	mov rp=loc0
	;;
	mov ar.unat=r9
	mov ar.pfs=loc1
	br.ret.sptk.many rp
END(sys_rt_sigsuspend)

ENTRY(sys_rt_sigreturn)
	PT_REGS_UNWIND_INFO(0)
	/*
	 * Allocate 8 input registers since ptrace() may clobber them
	 */
	alloc r2=ar.pfs,8,0,1,0
	.prologue
	PT_REGS_SAVES(16)
	adds sp=-16,sp
	.body
	cmp.eq pNonSys,pSys=r0,r0		// sigreturn isn't a normal syscall...
	;;
	/*
	 * leave_kernel() restores f6-f11 from pt_regs, but since the streamlined
	 * syscall-entry path does not save them we save them here instead.  Note: we
	 * don't need to save any other registers that are not saved by the stream-lined
	 * syscall path, because restore_sigcontext() restores them.
	 */
	adds r16=PT(F6)+32,sp
	adds r17=PT(F7)+32,sp
	;;
 	stf.spill [r16]=f6,32
 	stf.spill [r17]=f7,32
	;;
 	stf.spill [r16]=f8,32
 	stf.spill [r17]=f9,32
	;;
 	stf.spill [r16]=f10
 	stf.spill [r17]=f11
	adds out0=16,sp				// out0 = &sigscratch
	br.call.sptk.many rp=ia64_rt_sigreturn
.ret19:	.restore sp,0
	adds sp=16,sp
	;;
	ld8 r9=[sp]				// load new ar.unat
	mov.sptk b7=r8,ia64_leave_kernel
	;;
	mov ar.unat=r9
	br.many b7
END(sys_rt_sigreturn)
#endif

GLOBAL_ENTRY(ia64_prepare_handle_unaligned)
	.prologue
	/*
	 * r16 = fake ar.pfs, we simply need to make sure privilege is still 0
	 */
	mov r16=r0
	DO_SAVE_SWITCH_STACK
	br.call.sptk.many rp=ia64_handle_unaligned	// stack frame setup in ivt
.ret21:	.body
	DO_LOAD_SWITCH_STACK
	br.cond.sptk.many rp				// goes to ia64_leave_kernel
END(ia64_prepare_handle_unaligned)

	//
	// unw_init_running(void (*callback)(info, arg), void *arg)
	//
#	define EXTRA_FRAME_SIZE	((UNW_FRAME_INFO_SIZE+15)&~15)

GLOBAL_ENTRY(unw_init_running)
	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
	alloc loc1=ar.pfs,2,3,3,0
	;;
	ld8 loc2=[in0],8
	mov loc0=rp
	mov r16=loc1
	DO_SAVE_SWITCH_STACK
	.body

	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
	.fframe IA64_SWITCH_STACK_SIZE+EXTRA_FRAME_SIZE
	SWITCH_STACK_SAVES(EXTRA_FRAME_SIZE)
	adds sp=-EXTRA_FRAME_SIZE,sp
	.body
	;;
	adds out0=16,sp				// &info
	mov out1=r13				// current
	adds out2=16+EXTRA_FRAME_SIZE,sp	// &switch_stack
	br.call.sptk.many rp=unw_init_frame_info
1:	adds out0=16,sp				// &info
	mov b6=loc2
	mov loc2=gp				// save gp across indirect function call
	;;
	ld8 gp=[in0]
	mov out1=in1				// arg
	br.call.sptk.many rp=b6			// invoke the callback function
1:	mov gp=loc2				// restore gp

	// For now, we don't allow changing registers from within
	// unw_init_running; if we ever want to allow that, we'd
	// have to do a load_switch_stack here:
	.restore sp
	adds sp=IA64_SWITCH_STACK_SIZE+EXTRA_FRAME_SIZE,sp

	mov ar.pfs=loc1
	mov rp=loc0
	br.ret.sptk.many rp
END(unw_init_running)

#ifdef XEN
GLOBAL_ENTRY(ia64_do_multicall_call)
	movl r2=ia64_hypercall_table;;
	shladd r2=r38,3,r2;;
	ld8 r2=[r2];;
	mov b6=r2
	br.sptk.many b6;;
END(ia64_do_multicall_call)

    
	.rodata
	.align 8
	.globl ia64_hypercall_table
ia64_hypercall_table:
	data8 do_ni_hypercall		/* do_set_trap_table *//*  0 */
	data8 do_ni_hypercall		/* do_mmu_update */
	data8 do_ni_hypercall		/* do_set_gdt */
	data8 do_ni_hypercall		/* do_stack_switch */
	data8 do_ni_hypercall		/* do_set_callbacks */
	data8 do_ni_hypercall		/* do_fpu_taskswitch *//*  5 */
	data8 do_sched_op_compat
	data8 do_ni_hypercall
	data8 do_ni_hypercall		/* do_set_debugreg */
	data8 do_ni_hypercall		/* do_get_debugreg */
	data8 do_ni_hypercall		/* do_update_descriptor * 10 */
	data8 do_ni_hypercall		/* do_ni_hypercall */
	data8 do_memory_op
	data8 do_multicall
	data8 do_ni_hypercall		/* do_update_va_mapping */
	data8 do_ni_hypercall		/* do_set_timer_op */  /* 15 */
	data8 do_ni_hypercall
	data8 do_xen_version
	data8 do_console_io
	data8 do_ni_hypercall
	data8 do_grant_table_op				       /* 20 */
	data8 do_ni_hypercall		/* do_vm_assist */
	data8 do_ni_hypercall		/* do_update_va_mapping_othe */
	data8 do_ni_hypercall		/* (x86 only) */
	data8 do_vcpu_op		/* do_vcpu_op */
	data8 do_ni_hypercall		/* (x86_64 only) */    /* 25 */
	data8 do_ni_hypercall		/* do_mmuext_op */
	data8 do_ni_hypercall		/* do_acm_op */
	data8 do_ni_hypercall		/* do_nmi_op */
	data8 do_sched_op
	data8 do_callback_op		/*  */                 /* 30 */
	data8 do_xenoprof_op		/*  */
	data8 do_event_channel_op
	data8 do_physdev_op
	data8 do_hvm_op			/*  */
	data8 do_sysctl			/*  */                  /* 35 */
	data8 do_domctl			/*  */
	data8 do_kexec_op		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */                 /* 40 */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */                 /* 45 */
	data8 do_ni_hypercall		/*  */
	data8 do_ni_hypercall		/*  */
	data8 do_dom0vp_op              /* dom0vp_op */
	data8 do_pirq_guest_eoi		/* arch_1 */
	data8 do_ia64_debug_op		/* arch_2 */           /* 50 */
	data8 do_ni_hypercall		/* arch_3 */
	data8 do_ni_hypercall		/* arch_4 */
	data8 do_ni_hypercall		/* arch_5 */
	data8 do_ni_hypercall		/* arch_6 */
	data8 do_ni_hypercall		/* arch_7 */           /* 55 */
	data8 do_ni_hypercall
	data8 do_ni_hypercall
	data8 do_ni_hypercall
	data8 do_ni_hypercall
	data8 do_ni_hypercall                                  /* 60 */
	data8 do_ni_hypercall
	data8 do_ni_hypercall
	data8 do_ni_hypercall

	// guard against failures to increase NR_hypercalls
	.org ia64_hypercall_table + 8*NR_hypercalls

#else
	.rodata
	.align 8
	.globl sys_call_table
sys_call_table:
	data8 sys_ni_syscall		//  This must be sys_ni_syscall!  See ivt.S.
	data8 sys_exit				// 1025
	data8 sys_read
	data8 sys_write
	data8 sys_open
	data8 sys_close
	data8 sys_creat				// 1030
	data8 sys_link
	data8 sys_unlink
	data8 ia64_execve
	data8 sys_chdir
	data8 sys_fchdir			// 1035
	data8 sys_utimes
	data8 sys_mknod
	data8 sys_chmod
	data8 sys_chown
	data8 sys_lseek				// 1040
	data8 sys_getpid
	data8 sys_getppid
	data8 sys_mount
	data8 sys_umount
	data8 sys_setuid			// 1045
	data8 sys_getuid
	data8 sys_geteuid
	data8 sys_ptrace
	data8 sys_access
	data8 sys_sync				// 1050
	data8 sys_fsync
	data8 sys_fdatasync
	data8 sys_kill
	data8 sys_rename
	data8 sys_mkdir				// 1055
	data8 sys_rmdir
	data8 sys_dup
	data8 sys_pipe
	data8 sys_times
	data8 ia64_brk				// 1060
	data8 sys_setgid
	data8 sys_getgid
	data8 sys_getegid
	data8 sys_acct
	data8 sys_ioctl				// 1065
	data8 sys_fcntl
	data8 sys_umask
	data8 sys_chroot
	data8 sys_ustat
	data8 sys_dup2				// 1070
	data8 sys_setreuid
	data8 sys_setregid
	data8 sys_getresuid
	data8 sys_setresuid
	data8 sys_getresgid			// 1075
	data8 sys_setresgid
	data8 sys_getgroups
	data8 sys_setgroups
	data8 sys_getpgid
	data8 sys_setpgid			// 1080
	data8 sys_setsid
	data8 sys_getsid
	data8 sys_sethostname
	data8 sys_setrlimit
	data8 sys_getrlimit			// 1085
	data8 sys_getrusage
	data8 sys_gettimeofday
	data8 sys_settimeofday
	data8 sys_select
	data8 sys_poll				// 1090
	data8 sys_symlink
	data8 sys_readlink
	data8 sys_uselib
	data8 sys_swapon
	data8 sys_swapoff			// 1095
	data8 sys_reboot
	data8 sys_truncate
	data8 sys_ftruncate
	data8 sys_fchmod
	data8 sys_fchown			// 1100
	data8 ia64_getpriority
	data8 sys_setpriority
	data8 sys_statfs
	data8 sys_fstatfs
	data8 sys_gettid			// 1105
	data8 sys_semget
	data8 sys_semop
	data8 sys_semctl
	data8 sys_msgget
	data8 sys_msgsnd			// 1110
	data8 sys_msgrcv
	data8 sys_msgctl
	data8 sys_shmget
	data8 sys_shmat
	data8 sys_shmdt				// 1115
	data8 sys_shmctl
	data8 sys_syslog
	data8 sys_setitimer
	data8 sys_getitimer
	data8 sys_ni_syscall			// 1120		/* was: ia64_oldstat */
	data8 sys_ni_syscall					/* was: ia64_oldlstat */
	data8 sys_ni_syscall					/* was: ia64_oldfstat */
	data8 sys_vhangup
	data8 sys_lchown
	data8 sys_remap_file_pages		// 1125
	data8 sys_wait4
	data8 sys_sysinfo
	data8 sys_clone
	data8 sys_setdomainname
	data8 sys_newuname			// 1130
	data8 sys_adjtimex
	data8 sys_ni_syscall					/* was: ia64_create_module */
	data8 sys_init_module
	data8 sys_delete_module
	data8 sys_ni_syscall			// 1135		/* was: sys_get_kernel_syms */
	data8 sys_ni_syscall					/* was: sys_query_module */
	data8 sys_quotactl
	data8 sys_bdflush
	data8 sys_sysfs
	data8 sys_personality			// 1140
	data8 sys_ni_syscall		// sys_afs_syscall
	data8 sys_setfsuid
	data8 sys_setfsgid
	data8 sys_getdents
	data8 sys_flock				// 1145
	data8 sys_readv
	data8 sys_writev
	data8 sys_pread64
	data8 sys_pwrite64
	data8 sys_sysctl			// 1150
	data8 sys_mmap
	data8 sys_munmap
	data8 sys_mlock
	data8 sys_mlockall
	data8 sys_mprotect			// 1155
	data8 ia64_mremap
	data8 sys_msync
	data8 sys_munlock
	data8 sys_munlockall
	data8 sys_sched_getparam		// 1160
	data8 sys_sched_setparam
	data8 sys_sched_getscheduler
	data8 sys_sched_setscheduler
	data8 sys_sched_yield
	data8 sys_sched_get_priority_max	// 1165
	data8 sys_sched_get_priority_min
	data8 sys_sched_rr_get_interval
	data8 sys_nanosleep
	data8 sys_nfsservctl
	data8 sys_prctl				// 1170
	data8 sys_getpagesize
	data8 sys_mmap2
	data8 sys_pciconfig_read
	data8 sys_pciconfig_write
	data8 sys_perfmonctl			// 1175
	data8 sys_sigaltstack
	data8 sys_rt_sigaction
	data8 sys_rt_sigpending
	data8 sys_rt_sigprocmask
	data8 sys_rt_sigqueueinfo		// 1180
	data8 sys_rt_sigreturn
	data8 sys_rt_sigsuspend
	data8 sys_rt_sigtimedwait
	data8 sys_getcwd
	data8 sys_capget			// 1185
	data8 sys_capset
	data8 sys_sendfile64
	data8 sys_ni_syscall		// sys_getpmsg (STREAMS)
	data8 sys_ni_syscall		// sys_putpmsg (STREAMS)
	data8 sys_socket			// 1190
	data8 sys_bind
	data8 sys_connect
	data8 sys_listen
	data8 sys_accept
	data8 sys_getsockname			// 1195
	data8 sys_getpeername
	data8 sys_socketpair
	data8 sys_send
	data8 sys_sendto
	data8 sys_recv				// 1200
	data8 sys_recvfrom
	data8 sys_shutdown
	data8 sys_setsockopt
	data8 sys_getsockopt
	data8 sys_sendmsg			// 1205
	data8 sys_recvmsg
	data8 sys_pivot_root
	data8 sys_mincore
	data8 sys_madvise
	data8 sys_newstat			// 1210
	data8 sys_newlstat
	data8 sys_newfstat
	data8 sys_clone2
	data8 sys_getdents64
	data8 sys_getunwind			// 1215
	data8 sys_readahead
	data8 sys_setxattr
	data8 sys_lsetxattr
	data8 sys_fsetxattr
	data8 sys_getxattr			// 1220
	data8 sys_lgetxattr
	data8 sys_fgetxattr
	data8 sys_listxattr
	data8 sys_llistxattr
	data8 sys_flistxattr			// 1225
	data8 sys_removexattr
	data8 sys_lremovexattr
	data8 sys_fremovexattr
	data8 sys_tkill
	data8 sys_futex				// 1230
	data8 sys_sched_setaffinity
	data8 sys_sched_getaffinity
	data8 sys_set_tid_address
	data8 sys_fadvise64_64
	data8 sys_tgkill 			// 1235
	data8 sys_exit_group
	data8 sys_lookup_dcookie
	data8 sys_io_setup
	data8 sys_io_destroy
	data8 sys_io_getevents			// 1240
	data8 sys_io_submit
	data8 sys_io_cancel
	data8 sys_epoll_create
	data8 sys_epoll_ctl
	data8 sys_epoll_wait			// 1245
	data8 sys_restart_syscall
	data8 sys_semtimedop
	data8 sys_timer_create
	data8 sys_timer_settime
	data8 sys_timer_gettime			// 1250
	data8 sys_timer_getoverrun
	data8 sys_timer_delete
	data8 sys_clock_settime
	data8 sys_clock_gettime
	data8 sys_clock_getres			// 1255
	data8 sys_clock_nanosleep
	data8 sys_fstatfs64
	data8 sys_statfs64
	data8 sys_mbind
	data8 sys_get_mempolicy			// 1260
	data8 sys_set_mempolicy
	data8 sys_mq_open
	data8 sys_mq_unlink
	data8 sys_mq_timedsend
	data8 sys_mq_timedreceive		// 1265
	data8 sys_mq_notify
	data8 sys_mq_getsetattr
	data8 sys_ni_syscall			// reserved for kexec_load
	data8 sys_ni_syscall			// reserved for vserver
	data8 sys_waitid			// 1270
	data8 sys_add_key
	data8 sys_request_key
	data8 sys_keyctl
	data8 sys_ioprio_set
	data8 sys_ioprio_get			// 1275
	data8 sys_ni_syscall
	data8 sys_inotify_init
	data8 sys_inotify_add_watch
	data8 sys_inotify_rm_watch

	.org sys_call_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls
#endif