--- /dev/null
+/*
+ * 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 - 2000, 2001 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ * Copyright (C) 2004 Thiemo Seufer
+ *
+ * Hairy, the userspace application uses a different argument passing
+ * convention than the kernel, so we have to translate things from o32
+ * to ABI64 calling convention. 64-bit syscalls are also processed
+ * here for now.
+ */
+#include <linux/errno.h>
+#include <asm/asm.h>
+#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+#include <asm/sysmips.h>
+
+ .align 5
+NESTED(handle_sys, PT_SIZE, sp)
+ .set noat
+ SAVE_SOME
+ TRACE_IRQS_ON_RELOAD
+ STI
+ .set at
+ ld t1, PT_EPC(sp) # skip syscall on return
+
+ dsubu t0, v0, __NR_O32_Linux # check syscall number
+ sltiu t0, t0, __NR_O32_Linux_syscalls + 1
+ daddiu t1, 4 # skip to next instruction
+ sd t1, PT_EPC(sp)
+ beqz t0, not_o32_scall
+#if 0
+ SAVE_ALL
+ move a1, v0
+ PRINT("Scall %ld\n")
+ RESTORE_ALL
+#endif
+
+ /* We don't want to stumble over broken sign extensions from
+ userland. O32 does never use the upper half. */
+ sll a0, a0, 0
+ sll a1, a1, 0
+ sll a2, a2, 0
+ sll a3, a3, 0
+
+ dsll t0, v0, 3 # offset into table
+ ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
+
+ sd a3, PT_R26(sp) # save a3 for syscall restarting
+
+ /*
+ * More than four arguments. Try to deal with it by copying the
+ * stack arguments from the user stack to the kernel stack.
+ * This Sucks (TM).
+ *
+ * We intentionally keep the kernel stack a little below the top of
+ * userspace so we don't have to do a slower byte accurate check here.
+ */
+ ld t0, PT_R29(sp) # get old user stack pointer
+ daddu t1, t0, 32
+ bltz t1, bad_stack
+
+1: lw a4, 16(t0) # argument #5 from usp
+2: lw a5, 20(t0) # argument #6 from usp
+3: lw a6, 24(t0) # argument #7 from usp
+4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
+
+ .section __ex_table,"a"
+ PTR 1b, bad_stack
+ PTR 2b, bad_stack
+ PTR 3b, bad_stack
+ PTR 4b, bad_stack
+ .previous
+
+ li t1, _TIF_WORK_SYSCALL_ENTRY
+ LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
+ and t0, t1, t0
+ 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
+
+ ld t1, PT_R2(sp) # syscall number
+ dnegu v0 # error
+ sd t1, PT_R0(sp) # save it for syscall restarting
+1: sd v0, PT_R2(sp) # result
+
+o32_syscall_exit:
+ j syscall_exit_partial
+
+/* ------------------------------------------------------------------------ */
+
+trace_a_syscall:
+ SAVE_STATIC
+ sd a4, PT_R8(sp) # Save argument registers
+ sd a5, PT_R9(sp)
+ sd a6, PT_R10(sp)
+ sd a7, PT_R11(sp) # For indirect syscalls
+
+ move s0, t2 # Save syscall pointer
+ move a0, sp
+ /*
+ * absolute syscall number is in v0 unless we called syscall(__NR_###)
+ * where the real syscall number is in a0
+ * note: NR_syscall is the first O32 syscall but the macro is
+ * only defined when compiling with -mabi=32 (CONFIG_32BIT)
+ * therefore __NR_O32_Linux is used (4000)
+ */
+ .set push
+ .set reorder
+ subu t1, v0, __NR_O32_Linux
+ move a1, v0
+ bnez t1, 1f /* __NR_syscall at offset 0 */
+ lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
+ .set pop
+
+1: jal syscall_trace_enter
+
+ bltz v0, 2f # seccomp failed? Skip syscall
+
+ move t0, s0
+ RESTORE_STATIC
+ ld a0, PT_R4(sp) # Restore argument registers
+ ld a1, PT_R5(sp)
+ ld a2, PT_R6(sp)
+ ld a3, PT_R7(sp)
+ ld a4, PT_R8(sp)
+ ld a5, PT_R9(sp)
+ ld a6, PT_R10(sp)
+ ld a7, PT_R11(sp) # For indirect syscalls
+ jalr t0
+
+ li t0, -EMAXERRNO - 1 # error?
+ sltu t0, t0, v0
+ sd t0, PT_R7(sp) # set error flag
+ beqz t0, 1f
+
+ ld t1, PT_R2(sp) # syscall number
+ dnegu v0 # error
+ sd t1, PT_R0(sp) # save it for syscall restarting
+1: sd v0, PT_R2(sp) # result
+
+2: j syscall_exit
+
+/* ------------------------------------------------------------------------ */
+
+ /*
+ * The stackpointer for a call with more than 4 arguments is bad.
+ */
+bad_stack:
+ li v0, EFAULT
+ sd v0, PT_R2(sp)
+ li t0, 1 # set error flag
+ sd t0, PT_R7(sp)
+ j o32_syscall_exit
+
+not_o32_scall:
+ /*
+ * This is not an o32 compatibility syscall, pass it on
+ * to the 64-bit syscall handlers.
+ */
+#ifdef CONFIG_MIPS32_N32
+ j handle_sysn32
+#else
+ j handle_sys64
+#endif
+ END(handle_sys)
+
+LEAF(sys32_syscall)
+ subu t0, a0, __NR_O32_Linux # check syscall number
+ sltiu v0, t0, __NR_O32_Linux_syscalls + 1
+ beqz t0, einval # do not recurse
+ dsll t1, t0, 3
+ beqz v0, einval
+ ld t2, sys32_call_table(t1) # syscall routine
+ sd a0, PT_R2(sp) # call routine directly on restart
+
+ move a0, a1 # shift argument registers
+ move a1, a2
+ move a2, a3
+ move a3, a4
+ move a4, a5
+ move a5, a6
+ move a6, a7
+ sd a0, PT_R4(sp) # ... and push back a0 - a3, some
+ sd a1, PT_R5(sp) # syscalls expect them there
+ sd a2, PT_R6(sp)
+ sd a3, PT_R7(sp)
+ sd a3, PT_R26(sp) # update a3 for syscall restarting
+ jr t2
+ /* Unreached */
+
+einval: li v0, -ENOSYS
+ jr ra
+ END(sys32_syscall)
+
+ .align 3
+ .type sys32_call_table,@object
+EXPORT(sys32_call_table)
+ PTR sys32_syscall /* 4000 */
+ PTR sys_exit
+ PTR __sys_fork
+ PTR sys_read
+ PTR sys_write
+ PTR compat_sys_open /* 4005 */
+ PTR sys_close
+ PTR sys_waitpid
+ PTR sys_creat
+ PTR sys_link
+ PTR sys_unlink /* 4010 */
+ PTR compat_sys_execve
+ PTR sys_chdir
+ PTR compat_sys_time
+ PTR sys_mknod
+ PTR sys_chmod /* 4015 */
+ PTR sys_lchown
+ PTR sys_ni_syscall
+ PTR sys_ni_syscall /* was sys_stat */
+ PTR sys_lseek
+ PTR sys_getpid /* 4020 */
+ PTR compat_sys_mount
+ PTR sys_oldumount
+ PTR sys_setuid
+ PTR sys_getuid
+ PTR compat_sys_stime /* 4025 */
+ PTR compat_sys_ptrace
+ PTR sys_alarm
+ PTR sys_ni_syscall /* was sys_fstat */
+ PTR sys_pause
+ PTR compat_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 sysm_pipe
+ PTR compat_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 compat_sys_ioctl
+ PTR compat_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 compat_sys_ustat
+ PTR sys_dup2
+ PTR sys_getppid
+ PTR sys_getpgrp /* 4065 */
+ PTR sys_setsid
+ PTR sys_32_sigaction
+ PTR sys_sgetmask
+ PTR sys_ssetmask
+ PTR sys_setreuid /* 4070 */
+ PTR sys_setregid
+ PTR sys32_sigsuspend
+ PTR compat_sys_sigpending
+ PTR sys_sethostname
+ PTR compat_sys_setrlimit /* 4075 */
+ PTR compat_sys_getrlimit
+ PTR compat_sys_getrusage
+ PTR compat_sys_gettimeofday
+ PTR compat_sys_settimeofday
+ PTR sys_getgroups /* 4080 */
+ PTR sys_setgroups
+ PTR sys_ni_syscall /* old_select */
+ PTR sys_symlink
+ PTR sys_ni_syscall /* was sys_lstat */
+ PTR sys_readlink /* 4085 */
+ PTR sys_uselib
+ PTR sys_swapon
+ PTR sys_reboot
+ PTR compat_sys_old_readdir
+ PTR sys_mips_mmap /* 4090 */
+ PTR sys_munmap
+ PTR compat_sys_truncate
+ PTR compat_sys_ftruncate
+ PTR sys_fchmod
+ PTR sys_fchown /* 4095 */
+ PTR sys_getpriority
+ PTR sys_setpriority
+ PTR sys_ni_syscall
+ PTR compat_sys_statfs
+ PTR compat_sys_fstatfs /* 4100 */
+ PTR sys_ni_syscall /* sys_ioperm */
+ PTR compat_sys_socketcall
+ PTR sys_syslog
+ PTR compat_sys_setitimer
+ PTR compat_sys_getitimer /* 4105 */
+ PTR compat_sys_newstat
+ PTR compat_sys_newlstat
+ PTR compat_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 compat_sys_wait4
+ PTR sys_swapoff /* 4115 */
+ PTR compat_sys_sysinfo
+ PTR compat_sys_ipc
+ PTR sys_fsync
+ PTR sys32_sigreturn
+ PTR __sys_clone /* 4120 */
+ PTR sys_setdomainname
+ PTR sys_newuname
+ PTR sys_ni_syscall /* sys_modify_ldt */
+ PTR compat_sys_adjtimex
+ PTR sys_mprotect /* 4125 */
+ PTR compat_sys_sigprocmask
+ PTR sys_ni_syscall /* was creat_module */
+ PTR sys_init_module
+ PTR sys_delete_module
+ PTR sys_ni_syscall /* 4130, get_kernel_syms */
+ PTR sys_quotactl
+ PTR sys_getpgid
+ PTR sys_fchdir
+ PTR sys_bdflush
+ PTR sys_sysfs /* 4135 */
+ PTR sys_32_personality
+ PTR sys_ni_syscall /* for afs_syscall */
+ PTR sys_setfsuid
+ PTR sys_setfsgid
+ PTR sys_32_llseek /* 4140 */
+ PTR compat_sys_getdents
+ PTR compat_sys_select
+ PTR sys_flock
+ PTR sys_msync
+ PTR compat_sys_readv /* 4145 */
+ PTR compat_sys_writev
+ PTR sys_cacheflush
+ PTR sys_cachectl
+ PTR sys_sysmips
+ PTR sys_ni_syscall /* 4150 */
+ PTR sys_getsid
+ PTR sys_fdatasync
+ PTR compat_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 compat_sys_sched_rr_get_interval /* 4165 */
+ PTR compat_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 compat_sys_recv /* 4175 */
+ PTR compat_sys_recvfrom
+ PTR compat_sys_recvmsg
+ PTR sys_send
+ PTR compat_sys_sendmsg
+ PTR sys_sendto /* 4180 */
+ PTR compat_sys_setsockopt
+ PTR sys_shutdown
+ PTR sys_socket
+ PTR sys_socketpair
+ PTR sys_setresuid /* 4185 */
+ PTR sys_getresuid
+ PTR sys_ni_syscall /* was query_module */
+ PTR sys_poll
+ PTR sys_ni_syscall /* was nfsservctl */
+ PTR sys_setresgid /* 4190 */
+ PTR sys_getresgid
+ PTR sys_prctl
+ PTR sys32_rt_sigreturn
+ PTR compat_sys_rt_sigaction
+ PTR compat_sys_rt_sigprocmask /* 4195 */
+ PTR compat_sys_rt_sigpending
+ PTR compat_sys_rt_sigtimedwait
+ PTR compat_sys_rt_sigqueueinfo
+ PTR compat_sys_rt_sigsuspend
+ PTR sys_32_pread /* 4200 */
+ PTR sys_32_pwrite
+ PTR sys_chown
+ PTR sys_getcwd
+ PTR sys_capget
+ PTR sys_capset /* 4205 */
+ PTR compat_sys_sigaltstack
+ PTR compat_sys_sendfile
+ PTR sys_ni_syscall
+ PTR sys_ni_syscall
+ PTR sys_mips_mmap2 /* 4210 */
+ PTR sys_32_truncate64
+ PTR sys_32_ftruncate64
+ PTR sys_newstat
+ PTR sys_newlstat
+ PTR sys_newfstat /* 4215 */
+ PTR sys_pivot_root
+ PTR sys_mincore
+ PTR sys_madvise
+ PTR sys_getdents64
+ PTR compat_sys_fcntl64 /* 4220 */
+ PTR sys_ni_syscall
+ PTR sys_gettid
+ PTR sys32_readahead
+ PTR sys_setxattr
+ PTR sys_lsetxattr /* 4225 */
+ PTR sys_fsetxattr
+ PTR sys_getxattr
+ PTR sys_lgetxattr
+ PTR sys_fgetxattr
+ PTR sys_listxattr /* 4230 */
+ PTR sys_llistxattr
+ PTR sys_flistxattr
+ PTR sys_removexattr
+ PTR sys_lremovexattr
+ PTR sys_fremovexattr /* 4235 */
+ PTR sys_tkill
+ PTR sys_sendfile64
+ PTR compat_sys_futex
+ PTR compat_sys_sched_setaffinity
+ PTR compat_sys_sched_getaffinity /* 4240 */
+ PTR compat_sys_io_setup
+ PTR sys_io_destroy
+ PTR compat_sys_io_getevents
+ PTR compat_sys_io_submit
+ PTR sys_io_cancel /* 4245 */
+ PTR sys_exit_group
+ PTR compat_sys_lookup_dcookie
+ PTR sys_epoll_create
+ PTR sys_epoll_ctl
+ PTR sys_epoll_wait /* 4250 */
+ PTR sys_remap_file_pages
+ PTR sys_set_tid_address
+ PTR sys_restart_syscall
+ PTR sys32_fadvise64_64
+ PTR compat_sys_statfs64 /* 4255 */
+ PTR compat_sys_fstatfs64
+ PTR compat_sys_timer_create
+ PTR compat_sys_timer_settime
+ PTR compat_sys_timer_gettime
+ PTR sys_timer_getoverrun /* 4260 */
+ PTR sys_timer_delete
+ PTR compat_sys_clock_settime
+ PTR compat_sys_clock_gettime
+ PTR compat_sys_clock_getres
+ PTR compat_sys_clock_nanosleep /* 4265 */
+ PTR sys_tgkill
+ PTR compat_sys_utimes
+ PTR compat_sys_mbind
+ PTR compat_sys_get_mempolicy
+ PTR compat_sys_set_mempolicy /* 4270 */
+ PTR compat_sys_mq_open
+ PTR sys_mq_unlink
+ PTR compat_sys_mq_timedsend
+ PTR compat_sys_mq_timedreceive
+ PTR compat_sys_mq_notify /* 4275 */
+ PTR compat_sys_mq_getsetattr
+ PTR sys_ni_syscall /* sys_vserver */
+ PTR compat_sys_waitid
+ PTR sys_ni_syscall /* available, was setaltroot */
+ PTR sys_add_key /* 4280 */
+ PTR sys_request_key
+ PTR sys_keyctl
+ PTR sys_set_thread_area
+ PTR sys_inotify_init
+ PTR sys_inotify_add_watch /* 4285 */
+ PTR sys_inotify_rm_watch
+ PTR compat_sys_migrate_pages
+ PTR compat_sys_openat
+ PTR sys_mkdirat
+ PTR sys_mknodat /* 4290 */
+ PTR sys_fchownat
+ PTR compat_sys_futimesat
+ PTR sys_newfstatat
+ PTR sys_unlinkat
+ PTR sys_renameat /* 4295 */
+ PTR sys_linkat
+ PTR sys_symlinkat
+ PTR sys_readlinkat
+ PTR sys_fchmodat
+ PTR sys_faccessat /* 4300 */
+ PTR compat_sys_pselect6
+ PTR compat_sys_ppoll
+ PTR sys_unshare
+ PTR sys_splice
+ PTR sys32_sync_file_range /* 4305 */
+ PTR sys_tee
+ PTR compat_sys_vmsplice
+ PTR compat_sys_move_pages
+ PTR compat_sys_set_robust_list
+ PTR compat_sys_get_robust_list /* 4310 */
+ PTR compat_sys_kexec_load
+ PTR sys_getcpu
+ PTR compat_sys_epoll_pwait
+ PTR sys_ioprio_set
+ PTR sys_ioprio_get /* 4315 */
+ PTR compat_sys_utimensat
+ PTR compat_sys_signalfd
+ PTR sys_ni_syscall /* was timerfd */
+ PTR sys_eventfd
+ PTR sys32_fallocate /* 4320 */
+ PTR sys_timerfd_create
+ PTR compat_sys_timerfd_gettime
+ PTR compat_sys_timerfd_settime
+ PTR compat_sys_signalfd4
+ PTR sys_eventfd2 /* 4325 */
+ PTR sys_epoll_create1
+ PTR sys_dup3
+ PTR sys_pipe2
+ PTR sys_inotify_init1
+ PTR compat_sys_preadv /* 4330 */
+ PTR compat_sys_pwritev
+ PTR compat_sys_rt_tgsigqueueinfo
+ PTR sys_perf_event_open
+ PTR sys_accept4
+ PTR compat_sys_recvmmsg /* 4335 */
+ PTR sys_fanotify_init
+ PTR compat_sys_fanotify_mark
+ PTR sys_prlimit64
+ PTR sys_name_to_handle_at
+ PTR compat_sys_open_by_handle_at /* 4340 */
+ PTR compat_sys_clock_adjtime
+ PTR sys_syncfs
+ PTR compat_sys_sendmmsg
+ PTR sys_setns
+ PTR compat_sys_process_vm_readv /* 4345 */
+ PTR compat_sys_process_vm_writev
+ PTR sys_kcmp
+ PTR sys_finit_module
+ PTR sys_sched_setattr
+ PTR sys_sched_getattr /* 4350 */
+ PTR sys_renameat2
+ PTR sys_seccomp
+ PTR sys_getrandom
+ PTR sys_memfd_create
+ PTR sys_bpf /* 4355 */
+ PTR compat_sys_execveat
+ .size sys32_call_table,.-sys32_call_table
Code Review / kvmfornfv.git / blobdiff