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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [mips/] [kernel/] [scall64-o32.S] - Rev 17
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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 - 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 5NESTED(handle_sys, PT_SIZE, sp).set noatSAVE_SOMETRACE_IRQS_ON_RELOADSTI.set atld t1, PT_EPC(sp) # skip syscall on returndsubu t0, v0, __NR_O32_Linux # check syscall numbersltiu t0, t0, __NR_O32_Linux_syscalls + 1daddiu t1, 4 # skip to next instructionsd t1, PT_EPC(sp)beqz t0, not_o32_scall#if 0SAVE_ALLmove a1, v0PRINT("Scall %ld\n")RESTORE_ALL#endif/* We don't want to stumble over broken sign extensions fromuserland. O32 does never use the upper half. */sll a0, a0, 0sll a1, a1, 0sll a2, a2, 0sll a3, a3, 0dsll t0, v0, 3 # offset into tableld t2, (sys_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 pointerdaddu t1, t0, 32bltz t1, bad_stack1: lw a4, 16(t0) # argument #5 from usp2: lw a5, 20(t0) # argument #6 from usp3: lw a6, 24(t0) # argument #7 from usp4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls).section __ex_table,"a"PTR 1b, bad_stackPTR 2b, bad_stackPTR 3b, bad_stackPTR 4b, bad_stack.previousli t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDITLONG_L t0, TI_FLAGS($28) # syscall tracing enabled?and t0, t1, t0bnez t0, trace_a_syscalljalr t2 # Do The Real Thing (TM)li t0, -EMAXERRNO - 1 # error?sltu t0, t0, v0sd t0, PT_R7(sp) # set error flagbeqz t0, 1fdnegu v0 # errorsd v0, PT_R0(sp) # flag for syscall restarting1: sd v0, PT_R2(sp) # resulto32_syscall_exit:local_irq_disable # make need_resched and# signals dont change between# sampling and returnLONG_L a2, TI_FLAGS($28)li t0, _TIF_ALLWORK_MASKand t0, a2, t0bnez t0, o32_syscall_exit_workj restore_partialo32_syscall_exit_work:j syscall_exit_work_partial/* ------------------------------------------------------------------------ */trace_a_syscall:SAVE_STATICsd a4, PT_R8(sp) # Save argument registerssd a5, PT_R9(sp)sd a6, PT_R10(sp)sd a7, PT_R11(sp) # For indirect syscallsmove s0, t2 # Save syscall pointermove a0, spli a1, 0jal do_syscall_tracemove t0, s0RESTORE_STATICld a0, PT_R4(sp) # Restore argument registersld 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 syscallsjalr t0li t0, -EMAXERRNO - 1 # error?sltu t0, t0, v0sd t0, PT_R7(sp) # set error flagbeqz t0, 1fdnegu v0 # errorsd v0, PT_R0(sp) # set flag for syscall restarting1: sd v0, PT_R2(sp) # resultj syscall_exit/* ------------------------------------------------------------------------ *//** The stackpointer for a call with more than 4 arguments is bad.*/bad_stack:dnegu v0 # errorsd v0, PT_R0(sp)sd v0, PT_R2(sp)li t0, 1 # set error flagsd t0, PT_R7(sp)j o32_syscall_exitnot_o32_scall:/** This is not an o32 compatibility syscall, pass it on* to the 64-bit syscall handlers.*/#ifdef CONFIG_MIPS32_N32j handle_sysn32#elsej handle_sys64#endifEND(handle_sys)LEAF(sys32_syscall)sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1beqz v0, einvaldsll v0, a0, 3ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)li v1, 4000 # indirect syscall numberbeq a0, v1, einval # do not recursemove a0, a1 # shift argument registersmove a1, a2move a2, a3move a3, a4move a4, a5move a5, a6move a6, a7sd a0, PT_R4(sp) # ... and push back a0 - a3, somesd a1, PT_R5(sp) # syscalls expect them theresd a2, PT_R6(sp)sd a3, PT_R7(sp)sd a3, PT_R26(sp) # update a3 for syscall restartingjr t2/* Unreached */einval: li v0, -EINVALjr raEND(sys32_syscall).align 3.type sys_call_table,@objectsys_call_table:PTR sys32_syscall /* 4000 */PTR sys_exitPTR sys_forkPTR sys_readPTR sys_writePTR compat_sys_open /* 4005 */PTR sys_closePTR sys_waitpidPTR sys_creatPTR sys_linkPTR sys_unlink /* 4010 */PTR sys32_execvePTR sys_chdirPTR compat_sys_timePTR sys_mknodPTR sys_chmod /* 4015 */PTR sys_lchownPTR sys_ni_syscallPTR sys_ni_syscall /* was sys_stat */PTR sys_lseekPTR sys_getpid /* 4020 */PTR compat_sys_mountPTR sys_oldumountPTR sys_setuidPTR sys_getuidPTR compat_sys_stime /* 4025 */PTR sys32_ptracePTR sys_alarmPTR sys_ni_syscall /* was sys_fstat */PTR sys_pausePTR compat_sys_utime /* 4030 */PTR sys_ni_syscallPTR sys_ni_syscallPTR sys_accessPTR sys_nicePTR sys_ni_syscall /* 4035 */PTR sys_syncPTR sys_killPTR sys_renamePTR sys_mkdirPTR sys_rmdir /* 4040 */PTR sys_dupPTR sys_pipePTR compat_sys_timesPTR sys_ni_syscallPTR sys_brk /* 4045 */PTR sys_setgidPTR sys_getgidPTR sys_ni_syscall /* was signal 2 */PTR sys_geteuidPTR sys_getegid /* 4050 */PTR sys_acctPTR sys_umountPTR sys_ni_syscallPTR compat_sys_ioctlPTR compat_sys_fcntl /* 4055 */PTR sys_ni_syscallPTR sys_setpgidPTR sys_ni_syscallPTR sys_oldunamePTR sys_umask /* 4060 */PTR sys_chrootPTR sys32_ustatPTR sys_dup2PTR sys_getppidPTR sys_getpgrp /* 4065 */PTR sys_setsidPTR sys32_sigactionPTR sys_sgetmaskPTR sys_ssetmaskPTR sys_setreuid /* 4070 */PTR sys_setregidPTR sys32_sigsuspendPTR compat_sys_sigpendingPTR sys_sethostnamePTR compat_sys_setrlimit /* 4075 */PTR compat_sys_getrlimitPTR compat_sys_getrusagePTR sys32_gettimeofdayPTR sys32_settimeofdayPTR sys_getgroups /* 4080 */PTR sys_setgroupsPTR sys_ni_syscall /* old_select */PTR sys_symlinkPTR sys_ni_syscall /* was sys_lstat */PTR sys_readlink /* 4085 */PTR sys_uselibPTR sys_swaponPTR sys_rebootPTR compat_sys_old_readdirPTR old_mmap /* 4090 */PTR sys_munmapPTR sys_truncatePTR sys_ftruncatePTR sys_fchmodPTR sys_fchown /* 4095 */PTR sys_getpriorityPTR sys_setpriorityPTR sys_ni_syscallPTR compat_sys_statfsPTR compat_sys_fstatfs /* 4100 */PTR sys_ni_syscall /* sys_ioperm */PTR compat_sys_socketcallPTR sys_syslogPTR compat_sys_setitimerPTR compat_sys_getitimer /* 4105 */PTR compat_sys_newstatPTR compat_sys_newlstatPTR compat_sys_newfstatPTR sys_unamePTR sys_ni_syscall /* sys_ioperm *//* 4110 */PTR sys_vhangupPTR sys_ni_syscall /* was sys_idle */PTR sys_ni_syscall /* sys_vm86 */PTR compat_sys_wait4PTR sys_swapoff /* 4115 */PTR compat_sys_sysinfoPTR sys32_ipcPTR sys_fsyncPTR sys32_sigreturnPTR sys32_clone /* 4120 */PTR sys_setdomainnamePTR sys32_newunamePTR sys_ni_syscall /* sys_modify_ldt */PTR compat_sys_adjtimexPTR sys_mprotect /* 4125 */PTR compat_sys_sigprocmaskPTR sys_ni_syscall /* was creat_module */PTR sys_init_modulePTR sys_delete_modulePTR sys_ni_syscall /* 4130, get_kernel_syms */PTR sys_quotactlPTR sys_getpgidPTR sys_fchdirPTR sys_bdflushPTR sys_sysfs /* 4135 */PTR sys32_personalityPTR sys_ni_syscall /* for afs_syscall */PTR sys_setfsuidPTR sys_setfsgidPTR sys32_llseek /* 4140 */PTR compat_sys_getdentsPTR compat_sys_selectPTR sys_flockPTR sys_msyncPTR compat_sys_readv /* 4145 */PTR compat_sys_writevPTR sys_cacheflushPTR sys_cachectlPTR sys_sysmipsPTR sys_ni_syscall /* 4150 */PTR sys_getsidPTR sys_fdatasyncPTR sys32_sysctlPTR sys_mlockPTR sys_munlock /* 4155 */PTR sys_mlockallPTR sys_munlockallPTR sys_sched_setparamPTR sys_sched_getparamPTR sys_sched_setscheduler /* 4160 */PTR sys_sched_getschedulerPTR sys_sched_yieldPTR sys_sched_get_priority_maxPTR sys_sched_get_priority_minPTR sys32_sched_rr_get_interval /* 4165 */PTR compat_sys_nanosleepPTR sys_mremapPTR sys_acceptPTR sys_bindPTR sys_connect /* 4170 */PTR sys_getpeernamePTR sys_getsocknamePTR sys_getsockoptPTR sys_listenPTR sys_recv /* 4175 */PTR sys_recvfromPTR compat_sys_recvmsgPTR sys_sendPTR compat_sys_sendmsgPTR sys_sendto /* 4180 */PTR compat_sys_setsockoptPTR sys_shutdownPTR sys_socketPTR sys_socketpairPTR sys_setresuid /* 4185 */PTR sys_getresuidPTR sys_ni_syscall /* was query_module */PTR sys_pollPTR compat_sys_nfsservctlPTR sys_setresgid /* 4190 */PTR sys_getresgidPTR sys_prctlPTR sys32_rt_sigreturnPTR sys32_rt_sigactionPTR sys32_rt_sigprocmask /* 4195 */PTR sys32_rt_sigpendingPTR compat_sys_rt_sigtimedwaitPTR sys32_rt_sigqueueinfoPTR sys32_rt_sigsuspendPTR sys32_pread /* 4200 */PTR sys32_pwritePTR sys_chownPTR sys_getcwdPTR sys_capgetPTR sys_capset /* 4205 */PTR sys32_sigaltstackPTR sys32_sendfilePTR sys_ni_syscallPTR sys_ni_syscallPTR sys32_mmap2 /* 4210 */PTR sys32_truncate64PTR sys32_ftruncate64PTR sys_newstatPTR sys_newlstatPTR sys_newfstat /* 4215 */PTR sys_pivot_rootPTR sys_mincorePTR sys_madvisePTR sys_getdents64PTR compat_sys_fcntl64 /* 4220 */PTR sys_ni_syscallPTR sys_gettidPTR sys32_readaheadPTR sys_setxattrPTR sys_lsetxattr /* 4225 */PTR sys_fsetxattrPTR sys_getxattrPTR sys_lgetxattrPTR sys_fgetxattrPTR sys_listxattr /* 4230 */PTR sys_llistxattrPTR sys_flistxattrPTR sys_removexattrPTR sys_lremovexattrPTR sys_fremovexattr /* 4235 */PTR sys_tkillPTR sys_sendfile64PTR compat_sys_futexPTR compat_sys_sched_setaffinityPTR compat_sys_sched_getaffinity /* 4240 */PTR sys_io_setupPTR sys_io_destroyPTR sys_io_geteventsPTR sys_io_submitPTR sys_io_cancel /* 4245 */PTR sys_exit_groupPTR sys_lookup_dcookiePTR sys_epoll_createPTR sys_epoll_ctlPTR sys_epoll_wait /* 4250 */PTR sys_remap_file_pagesPTR sys_set_tid_addressPTR sys_restart_syscallPTR sys32_fadvise64_64PTR compat_sys_statfs64 /* 4255 */PTR compat_sys_fstatfs64PTR compat_sys_timer_createPTR compat_sys_timer_settimePTR compat_sys_timer_gettimePTR sys_timer_getoverrun /* 4260 */PTR sys_timer_deletePTR compat_sys_clock_settimePTR compat_sys_clock_gettimePTR compat_sys_clock_getresPTR compat_sys_clock_nanosleep /* 4265 */PTR sys_tgkillPTR compat_sys_utimesPTR sys_ni_syscall /* sys_mbind */PTR sys_ni_syscall /* sys_get_mempolicy */PTR sys_ni_syscall /* 4270 sys_set_mempolicy */PTR compat_sys_mq_openPTR sys_mq_unlinkPTR compat_sys_mq_timedsendPTR compat_sys_mq_timedreceivePTR compat_sys_mq_notify /* 4275 */PTR compat_sys_mq_getsetattrPTR sys_ni_syscall /* sys_vserver */PTR sys32_waitidPTR sys_ni_syscall /* available, was setaltroot */PTR sys_add_key /* 4280 */PTR sys_request_keyPTR sys_keyctlPTR sys_set_thread_areaPTR sys_inotify_initPTR sys_inotify_add_watch /* 4285 */PTR sys_inotify_rm_watchPTR sys_migrate_pagesPTR compat_sys_openatPTR sys_mkdiratPTR sys_mknodat /* 4290 */PTR sys_fchownatPTR compat_sys_futimesatPTR sys_newfstatatPTR sys_unlinkatPTR sys_renameat /* 4295 */PTR sys_linkatPTR sys_symlinkatPTR sys_readlinkatPTR sys_fchmodatPTR sys_faccessat /* 4300 */PTR compat_sys_pselect6PTR sys_ppollPTR sys_unsharePTR sys_splicePTR sys32_sync_file_range /* 4305 */PTR sys_teePTR sys_vmsplicePTR compat_sys_move_pagesPTR compat_sys_set_robust_listPTR compat_sys_get_robust_list /* 4310 */PTR compat_sys_kexec_loadPTR sys_getcpuPTR compat_sys_epoll_pwaitPTR sys_ioprio_setPTR sys_ioprio_get /* 4315 */PTR compat_sys_utimensatPTR compat_sys_signalfdPTR compat_sys_timerfdPTR sys_eventfdPTR sys32_fallocate /* 4320 */.size sys_call_table,.-sys_call_table
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