| /* | |
| * 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 | |
| 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 | |
| load_a4: lw a4, 16(t0) # argument #5 from usp | |
| load_a5: lw a5, 20(t0) # argument #6 from usp | |
| load_a6: lw a6, 24(t0) # argument #7 from usp | |
| load_a7: lw a7, 28(t0) # argument #8 from usp | |
| loads_done: | |
| .section __ex_table,"a" | |
| PTR load_a4, bad_stack_a4 | |
| PTR load_a5, bad_stack_a5 | |
| PTR load_a6, bad_stack_a6 | |
| PTR load_a7, bad_stack_a7 | |
| .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 | |
| syscall_common: | |
| dsll t0, v0, 3 # offset into table | |
| ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0) | |
| 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 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, 1f # seccomp failed? Skip syscall | |
| RESTORE_STATIC | |
| ld v0, PT_R2(sp) # Restore syscall (maybe modified) | |
| 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 | |
| dsubu t0, v0, __NR_O32_Linux # check (new) syscall number | |
| sltiu t0, t0, __NR_O32_Linux_syscalls + 1 | |
| beqz t0, not_o32_scall | |
| j syscall_common | |
| 1: 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 | |
| bad_stack_a4: | |
| li a4, 0 | |
| b load_a5 | |
| bad_stack_a5: | |
| li a5, 0 | |
| b load_a6 | |
| bad_stack_a6: | |
| li a6, 0 | |
| b load_a7 | |
| bad_stack_a7: | |
| li a7, 0 | |
| b loads_done | |
| 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 compat_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 compat_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 | |
| PTR sys_userfaultfd | |
| PTR sys_membarrier | |
| PTR sys_mlock2 | |
| PTR sys_copy_file_range /* 4360 */ | |
| PTR compat_sys_preadv2 | |
| PTR compat_sys_pwritev2 | |
| PTR sys_pkey_mprotect | |
| PTR sys_pkey_alloc | |
| PTR sys_pkey_free /* 4365 */ | |
| .size sys32_call_table,.-sys32_call_table |