/* * 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, 02 by Ralf Baechle * Copyright (C) 2001 MIPS Technologies, Inc. */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* Highest syscall used of any syscall flavour */ #define MAX_SYSCALL_NO __NR_O32_Linux + __NR_O32_Linux_syscalls .align 5 NESTED(handle_sys, PT_SIZE, sp) .set noat SAVE_SOME STI .set at lw t1, PT_EPC(sp) # skip syscall on return sltiu t0, v0, MAX_SYSCALL_NO + 1 # check syscall number addiu t1, 4 # skip to next instruction sw t1, PT_EPC(sp) beqz t0, illegal_syscall /* XXX Put both in one cacheline, should save a bit. */ sll t0, v0, 2 lw t2, sys_call_table(t0) # syscall routine lbu t3, sys_narg_table(v0) # number of arguments beqz t2, illegal_syscall; subu t0, t3, 5 # 5 or more arguments? sw a3, PT_R26(sp) # save a3 for syscall restarting bgez t0, stackargs stack_done: sw a3, PT_R26(sp) # save for syscall restart LONG_L t0, TI_FLAGS($28) # syscall tracing enabled? li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT and t0, t1, t0 bnez t0, syscall_trace_entry # -> yes jalr t2 # Do The Real Thing (TM) li t0, -EMAXERRNO - 1 # error? sltu t0, t0, v0 sw t0, PT_R7(sp) # set error flag beqz t0, 1f negu v0 # error sw v0, PT_R0(sp) # set flag for syscall # restarting 1: sw v0, PT_R2(sp) # result EXPORT(o32_syscall_exit) local_irq_disable # make sure need_resched and # signals dont change between # sampling and return LONG_L a2, TI_FLAGS($28) # current->work li t0, _TIF_ALLWORK_MASK and t0, a2, t0 bnez t0, o32_syscall_exit_work j restore_partial o32_syscall_exit_work: j syscall_exit_work_partial /* ------------------------------------------------------------------------ */ syscall_trace_entry: SAVE_STATIC sw t2, PT_R1(sp) move a0, sp li a1, 0 jal do_syscall_trace lw t2, PT_R1(sp) lw a0, PT_R4(sp) # Restore argument registers lw a1, PT_R5(sp) lw a2, PT_R6(sp) lw a3, PT_R7(sp) jalr t2 li t0, -EMAXERRNO - 1 # error? sltu t0, t0, v0 sw t0, PT_R7(sp) # set error flag beqz t0, 1f negu v0 # error sw v0, PT_R0(sp) # set flag for syscall # restarting 1: sw v0, PT_R2(sp) # result j syscall_exit /* ------------------------------------------------------------------------ */ /* * 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). */ stackargs: lw t0, PT_R29(sp) # get old user stack pointer subu t3, 4 sll t1, t3, 2 # stack valid? addu t1, t0 # end address or t0, t1 bltz t0, bad_stack # -> sp is bad lw t0, PT_R29(sp) # get old user stack pointer PTR_LA t1, 4f # copy 1 to 3 arguments sll t3, t3, 4 subu t1, t3 jr t1 /* Ok, copy the args from the luser stack to the kernel stack */ /* * I know Ralf doesn't like nops but this avoids code * duplication for R3000 targets (and this is the * only place where ".set reorder" doesn't help). * Harald. */ .set push .set noreorder .set nomacro 1: lw t1, 24(t0) # argument #7 from usp nop sw t1, 24(sp) nop 2: lw t1, 20(t0) # argument #5 from usp nop sw t1, 20(sp) nop 3: lw t1, 16(t0) # argument #5 from usp nop sw t1, 16(sp) nop 4: .set pop j stack_done # go back .section __ex_table,"a" PTR 1b,bad_stack PTR 2b,bad_stack PTR 3b,bad_stack .previous /* * The stackpointer for a call with more than 4 arguments is bad. * We probably should handle this case a bit more drastic. */ bad_stack: negu v0 # error sw v0, PT_R0(sp) sw v0, PT_R2(sp) li t0, 1 # set error flag sw t0, PT_R7(sp) j o32_syscall_exit /* * The system call does not exist in this kernel */ illegal_syscall: li v0, ENOSYS # error sw v0, PT_R2(sp) li t0, 1 # set error flag sw t0, PT_R7(sp) j o32_syscall_exit END(handle_sys) LEAF(mips_atomic_set) andi v0, a1, 3 # must be word aligned bnez v0, bad_alignment lw v1, TI_ADDR_LIMIT($28) # in legal address range? addiu a0, a1, 4 or a0, a0, a1 and a0, a0, v1 bltz a0, bad_address #ifdef CONFIG_CPU_HAS_LLSC /* Ok, this is the ll/sc case. World is sane :-) */ 1: ll v0, (a1) move a0, a2 2: sc a0, (a1) #if R10000_LLSC_WAR beqzl a0, 1b #else beqz a0, 1b #endif .section __ex_table,"a" PTR 1b, bad_stack PTR 2b, bad_stack .previous #else sw a1, 16(sp) sw a2, 20(sp) move a0, sp move a2, a1 li a1, 1 jal do_page_fault lw a1, 16(sp) lw a2, 20(sp) /* * At this point the page should be readable and writable unless * there was no more memory available. */ 1: lw v0, (a1) 2: sw a2, (a1) .section __ex_table,"a" PTR 1b, no_mem PTR 2b, no_mem .previous #endif sw zero, PT_R7(sp) # success sw v0, PT_R2(sp) # result /* Success, so skip usual error handling garbage. */ LONG_L a2, TI_FLAGS($28) # syscall tracing enabled? li t0, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT and t0, a2, t0 bnez t0, 1f b o32_syscall_exit 1: SAVE_STATIC move a0, sp li a1, 1 jal do_syscall_trace j syscall_exit no_mem: li v0, -ENOMEM jr ra bad_address: li v0, -EFAULT jr ra bad_alignment: li v0, -EINVAL jr ra END(mips_atomic_set) LEAF(sys_sysmips) beq a0, MIPS_ATOMIC_SET, mips_atomic_set j _sys_sysmips END(sys_sysmips) LEAF(sys_syscall) lw t0, PT_R29(sp) # user sp sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1 beqz v0, enosys sll v0, a0, 2 la v1, sys_syscall lw t2, sys_call_table(v0) # function pointer lbu t4, sys_narg_table(a0) # number of arguments li v0, -EINVAL beq t2, v1, out # do not recurse beqz t2, enosys # null function pointer? andi v0, t0, 0x3 # unaligned stack pointer? bnez v0, sigsegv addu v0, t0, 16 # v0 = usp + 16 addu t1, v0, 12 # 3 32-bit arguments lw v1, TI_ADDR_LIMIT($28) or v0, v0, t1 and v1, v1, v0 bltz v1, efault move a0, a1 # shift argument registers move a1, a2 move a2, a3 1: lw a3, 16(t0) 2: lw t3, 20(t0) 3: lw t4, 24(t0) .section __ex_table, "a" .word 1b, efault .word 2b, efault .word 3b, efault .previous sw t3, 16(sp) # put into new stackframe sw t4, 20(sp) bnez t4, 1f # zero arguments? addu a0, sp, 32 # then pass sp in a0 1: sw t3, 16(sp) sw v1, 20(sp) jr t2 /* Unreached */ enosys: li v0, -ENOSYS b out sigsegv: li a0, _SIGSEGV move a1, $28 jal force_sig /* Fall through */ efault: li v0, -EFAULT out: jr ra END(sys_syscall) .macro fifty ptr, nargs, from=1, to=50 sys \ptr \nargs .if \to-\from fifty \ptr,\nargs,"(\from+1)",\to .endif .endm .macro mille ptr, nargs, from=1, to=20 fifty \ptr,\nargs .if \to-\from mille \ptr,\nargs,"(\from+1)",\to .endif .endm .macro syscalltable mille sys_ni_syscall 0 /* 0 - 999 SVR4 flavour */ #include "irix5sys.h" /* 1000 - 1999 32-bit IRIX */ mille sys_ni_syscall 0 /* 2000 - 2999 BSD43 flavour */ mille sys_ni_syscall 0 /* 3000 - 3999 POSIX flavour */ sys sys_syscall 0 /* 4000 */ sys sys_exit 1 sys sys_fork 0 sys sys_read 3 sys sys_write 3 sys sys_open 3 /* 4005 */ sys sys_close 1 sys sys_waitpid 3 sys sys_creat 2 sys sys_link 2 sys sys_unlink 1 /* 4010 */ sys sys_execve 0 sys sys_chdir 1 sys sys_time 1 sys sys_mknod 3 sys sys_chmod 2 /* 4015 */ sys sys_lchown 3 sys sys_ni_syscall 0 sys sys_ni_syscall 0 /* was sys_stat */ sys sys_lseek 3 sys sys_getpid 0 /* 4020 */ sys sys_mount 5 sys sys_oldumount 1 sys sys_setuid 1 sys sys_getuid 0 sys sys_stime 1 /* 4025 */ sys sys_ptrace 4 sys sys_alarm 1 sys sys_ni_syscall 0 /* was sys_fstat */ sys sys_pause 0 sys sys_utime 2 /* 4030 */ sys sys_ni_syscall 0 sys sys_ni_syscall 0 sys sys_access 2 sys sys_nice 1 sys sys_ni_syscall 0 /* 4035 */ sys sys_sync 0 sys sys_kill 2 sys sys_rename 2 sys sys_mkdir 2 sys sys_rmdir 1 /* 4040 */ sys sys_dup 1 sys sys_pipe 0 sys sys_times 1 sys sys_ni_syscall 0 sys sys_brk 1 /* 4045 */ sys sys_setgid 1 sys sys_getgid 0 sys sys_ni_syscall 0 /* was signal(2) */ sys sys_geteuid 0 sys sys_getegid 0 /* 4050 */ sys sys_acct 0 sys sys_umount 2 sys sys_ni_syscall 0 sys sys_ioctl 3 sys sys_fcntl 3 /* 4055 */ sys sys_ni_syscall 2 sys sys_setpgid 2 sys sys_ni_syscall 0 sys sys_olduname 1 sys sys_umask 1 /* 4060 */ sys sys_chroot 1 sys sys_ustat 2 sys sys_dup2 2 sys sys_getppid 0 sys sys_getpgrp 0 /* 4065 */ sys sys_setsid 0 sys sys_sigaction 3 sys sys_sgetmask 0 sys sys_ssetmask 1 sys sys_setreuid 2 /* 4070 */ sys sys_setregid 2 sys sys_sigsuspend 0 sys sys_sigpending 1 sys sys_sethostname 2 sys sys_setrlimit 2 /* 4075 */ sys sys_getrlimit 2 sys sys_getrusage 2 sys sys_gettimeofday 2 sys sys_settimeofday 2 sys sys_getgroups 2 /* 4080 */ sys sys_setgroups 2 sys sys_ni_syscall 0 /* old_select */ sys sys_symlink 2 sys sys_ni_syscall 0 /* was sys_lstat */ sys sys_readlink 3 /* 4085 */ sys sys_uselib 1 sys sys_swapon 2 sys sys_reboot 3 sys old_readdir 3 sys old_mmap 6 /* 4090 */ sys sys_munmap 2 sys sys_truncate 2 sys sys_ftruncate 2 sys sys_fchmod 2 sys sys_fchown 3 /* 4095 */ sys sys_getpriority 2 sys sys_setpriority 3 sys sys_ni_syscall 0 sys sys_statfs 2 sys sys_fstatfs 2 /* 4100 */ sys sys_ni_syscall 0 /* was ioperm(2) */ sys sys_socketcall 2 sys sys_syslog 3 sys sys_setitimer 3 sys sys_getitimer 2 /* 4105 */ sys sys_newstat 2 sys sys_newlstat 2 sys sys_newfstat 2 sys sys_uname 1 sys sys_ni_syscall 0 /* 4110 was iopl(2) */ sys sys_vhangup 0 sys sys_ni_syscall 0 /* was sys_idle() */ sys sys_ni_syscall 0 /* was sys_vm86 */ sys sys_wait4 4 sys sys_swapoff 1 /* 4115 */ sys sys_sysinfo 1 sys sys_ipc 6 sys sys_fsync 1 sys sys_sigreturn 0 sys sys_clone 0 /* 4120 */ sys sys_setdomainname 2 sys sys_newuname 1 sys sys_ni_syscall 0 /* sys_modify_ldt */ sys sys_adjtimex 1 sys sys_mprotect 3 /* 4125 */ sys sys_sigprocmask 3 sys sys_ni_syscall 0 /* was create_module */ sys sys_init_module 5 sys sys_delete_module 1 sys sys_ni_syscall 0 /* 4130 was get_kernel_syms */ sys sys_quotactl 0 sys sys_getpgid 1 sys sys_fchdir 1 sys sys_bdflush 2 sys sys_sysfs 3 /* 4135 */ sys sys_personality 1 sys sys_ni_syscall 0 /* for afs_syscall */ sys sys_setfsuid 1 sys sys_setfsgid 1 sys sys_llseek 5 /* 4140 */ sys sys_getdents 3 sys sys_select 5 sys sys_flock 2 sys sys_msync 3 sys sys_readv 3 /* 4145 */ sys sys_writev 3 sys sys_cacheflush 3 sys sys_cachectl 3 sys sys_sysmips 4 sys sys_ni_syscall 0 /* 4150 */ sys sys_getsid 1 sys sys_fdatasync 0 sys sys_sysctl 1 sys sys_mlock 2 sys sys_munlock 2 /* 4155 */ sys sys_mlockall 1 sys sys_munlockall 0 sys sys_sched_setparam 2 sys sys_sched_getparam 2 sys sys_sched_setscheduler 3 /* 4160 */ sys sys_sched_getscheduler 1 sys sys_sched_yield 0 sys sys_sched_get_priority_max 1 sys sys_sched_get_priority_min 1 sys sys_sched_rr_get_interval 2 /* 4165 */ sys sys_nanosleep, 2 sys sys_mremap, 4 sys sys_accept 3 sys sys_bind 3 sys sys_connect 3 /* 4170 */ sys sys_getpeername 3 sys sys_getsockname 3 sys sys_getsockopt 5 sys sys_listen 2 sys sys_recv 4 /* 4175 */ sys sys_recvfrom 6 sys sys_recvmsg 3 sys sys_send 4 sys sys_sendmsg 3 sys sys_sendto 6 /* 4180 */ sys sys_setsockopt 5 sys sys_shutdown 2 sys sys_socket 3 sys sys_socketpair 4 sys sys_setresuid 3 /* 4185 */ sys sys_getresuid 3 sys sys_ni_syscall 0 /* was sys_query_module */ sys sys_poll 3 sys sys_nfsservctl 3 sys sys_setresgid 3 /* 4190 */ sys sys_getresgid 3 sys sys_prctl 5 sys sys_rt_sigreturn 0 sys sys_rt_sigaction 4 sys sys_rt_sigprocmask 4 /* 4195 */ sys sys_rt_sigpending 2 sys sys_rt_sigtimedwait 4 sys sys_rt_sigqueueinfo 3 sys sys_rt_sigsuspend 0 sys sys_pread64 6 /* 4200 */ sys sys_pwrite64 6 sys sys_chown 3 sys sys_getcwd 2 sys sys_capget 2 sys sys_capset 2 /* 4205 */ sys sys_sigaltstack 0 sys sys_sendfile 4 sys sys_ni_syscall 0 sys sys_ni_syscall 0 sys sys_mmap2 6 /* 4210 */ sys sys_truncate64 4 sys sys_ftruncate64 4 sys sys_stat64 2 sys sys_lstat64 2 sys sys_fstat64 2 /* 4215 */ sys sys_pivot_root 2 sys sys_mincore 3 sys sys_madvise 3 sys sys_getdents64 3 sys sys_fcntl64 3 /* 4220 */ sys sys_ni_syscall 0 sys sys_gettid 0 sys sys_readahead 5 sys sys_setxattr 5 sys sys_lsetxattr 5 /* 4225 */ sys sys_fsetxattr 5 sys sys_getxattr 4 sys sys_lgetxattr 4 sys sys_fgetxattr 4 sys sys_listxattr 3 /* 4230 */ sys sys_llistxattr 3 sys sys_flistxattr 3 sys sys_removexattr 2 sys sys_lremovexattr 2 sys sys_fremovexattr 2 /* 4235 */ sys sys_tkill 2 sys sys_sendfile64 5 sys sys_futex 2 sys sys_sched_setaffinity 3 sys sys_sched_getaffinity 3 /* 4240 */ sys sys_io_setup 2 sys sys_io_destroy 1 sys sys_io_getevents 5 sys sys_io_submit 3 sys sys_io_cancel 3 /* 4245 */ sys sys_exit_group 1 sys sys_lookup_dcookie 3 sys sys_epoll_create 1 sys sys_epoll_ctl 4 sys sys_epoll_wait 3 /* 4250 */ sys sys_remap_file_pages 5 sys sys_set_tid_address 1 sys sys_restart_syscall 0 sys sys_fadvise64_64 7 sys sys_statfs64 3 /* 4255 */ sys sys_fstatfs64 2 sys sys_timer_create 3 sys sys_timer_settime 4 sys sys_timer_gettime 2 sys sys_timer_getoverrun 1 /* 4260 */ sys sys_timer_delete 1 sys sys_clock_settime 2 sys sys_clock_gettime 2 sys sys_clock_getres 2 sys sys_clock_nanosleep 4 /* 4265 */ sys sys_tgkill 3 sys sys_utimes 2 sys sys_ni_syscall 0 /* sys_mbind */ sys sys_ni_syscall 0 /* sys_get_mempolicy */ sys sys_ni_syscall 0 /* 4270 sys_set_mempolicy */ sys sys_mq_open 4 sys sys_mq_unlink 1 sys sys_mq_timedsend 5 sys sys_mq_timedreceive 5 sys sys_mq_notify 2 /* 4275 */ sys sys_mq_getsetattr 3 sys sys_ni_syscall 0 /* sys_vserver */ .endm .macro sys function, nargs PTR \function .endm .align 3 sys_call_table: syscalltable .size sys_call_table, . - sys_call_table .macro sys function, nargs .byte \nargs .endm sys_narg_table: syscalltable .size sys_narg_table, . - sys_narg_table