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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [mips64/] [kernel/] [scall_n32.S] - Rev 1765
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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, 96, 97, 98, 99, 2000, 01 by Ralf Baechle* Copyright (C) 1999, 2000 Silicon Graphics, Inc.* Copyright (C) 2001 MIPS Technologies, Inc.*/#include <linux/config.h>#include <asm/asm.h>#include <linux/errno.h>#include <asm/current.h>#include <asm/mipsregs.h>#include <asm/regdef.h>#include <asm/stackframe.h>#include <asm/unistd.h>/* This duplicates the definition from <linux/sched.h> */#define PT_TRACESYS 0x00000002 /* tracing system calls *//* This duplicates the definition from <asm/signal.h> */#define SIGILL 4 /* Illegal instruction (ANSI). */#ifndef CONFIG_MIPS32_O32/* No O32, so define handle_sys here */#define handle_sysn32 handle_sys#endif.align 5NESTED(handle_sysn32, PT_SIZE, sp)#ifndef CONFIG_MIPS32_O32.set noatSAVE_SOMESTI.set at#endifld t1, PT_EPC(sp) # skip syscall on returnsubu t0, v0, __NR_N32_Linux # check syscall numbersltiu t0, t0, __NR_N32_Linux_syscalls + 1daddiu t1, 4 # skip to next instructionbeqz t0, not_n32_scallsd t1, PT_EPC(sp)dsll t0, v0, 3 # offset into tableld t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)sd a3, PT_R26(sp) # save a3 for syscall restartingld t0, TASK_PTRACE($28) # syscall tracing enabled?andi t0, PT_TRACESYSbnez 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, 1fnegu v0 # errorsd v0, PT_R0(sp) # set flag for syscall restarting1: sd v0, PT_R2(sp) # resultret_from_sys_call:mfc0 t0, CP0_STATUSxori t0, t0, 1ori t0, t0, 1mtc0 t0, CP0_STATUSld t2, TASK_NEED_RESCHED($28)bnez t2, n32_reschedulelw v0, TASK_SIGPENDING($28)bnez v0, signal_returnrestore_all:RESTORE_SOMERESTORE_SPeret/* Put this behind restore_all for the sake of the branch prediction. */signal_return:.type signal_return, @functionmfc0 t0, CP0_STATUSori t0, t0, 1mtc0 t0, CP0_STATUSSAVE_STATICmove a0, zeromove a1, spjal do_signalRESTORE_STATICb restore_alln32_reschedule:SAVE_STATICjal scheduleb ret_from_sys_call/* ------------------------------------------------------------------------ */trace_a_syscall:SAVE_STATICsd t2,PT_R1(sp)jal syscall_traceld t2,PT_R1(sp)ld a0, PT_R4(sp) # Restore argument registersld a1, PT_R5(sp)ld a2, PT_R6(sp)ld a3, PT_R7(sp)jalr t2li t0, -EMAXERRNO - 1 # error?sltu t0, t0, v0sd t0, PT_R7(sp) # set error flagbeqz t0, 1fnegu v0 # errorsd v0, PT_R0(sp) # set flag for syscall restarting1: sd v0, PT_R2(sp) # resultjal syscall_tracej ret_from_sys_callnot_n32_scall:/* This is not an n32 compatibility syscall, pass it on tothe n64 syscall handlers. */j handle_sys64END(handle_sysn32)EXPORT(sysn32_call_table)PTR sys_read /* 6000 */PTR sys_writePTR sys_openPTR sys_closePTR sys_newstatPTR sys_newfstat /* 6005 */PTR sys_newlstatPTR sys_pollPTR sys_lseekPTR sys_mmapPTR sys_mprotect /* 6010 */PTR sys_munmapPTR sys_brkPTR sys32_rt_sigactionPTR sys32_rt_sigprocmaskPTR sys32_ioctl /* 6015 */PTR sys_preadPTR sys_pwritePTR sys32_readvPTR sys32_writevPTR sys_access /* 6020 */PTR sys_pipePTR sys32_selectPTR sys_sched_yieldPTR sys_mremapPTR sys_msync /* 6025 */PTR sys_mincorePTR sys_madvisePTR sys_shmgetPTR sys_shmatPTR sys_shmctl /* 6030 */PTR sys_dupPTR sys_dup2PTR sys_pausePTR sys32_nanosleepPTR sys32_getitimer /* 6035 */PTR sys32_setitimerPTR sys_alarmPTR sys_getpidPTR sys32_sendfilePTR sys_socket /* 6040 */PTR sys_connectPTR sys_acceptPTR sys_sendtoPTR sys_recvfromPTR sys32_sendmsg /* 6045 */PTR sys32_recvmsgPTR sys_shutdownPTR sys_bindPTR sys_listenPTR sys_getsockname /* 6050 */PTR sys_getpeernamePTR sys_socketpairPTR sys32_setsockoptPTR sys_getsockoptPTR sys_clone /* 6055 */PTR sys_forkPTR sys32_execvePTR sys_exitPTR sys32_wait4PTR sys_kill /* 6060 */PTR sys32_newunamePTR sys_semgetPTR sys_semopPTR sys_semctlPTR sys_shmdt /* 6065 */PTR sys_msggetPTR sys_msgsndPTR sys_msgrcvPTR sys_msgctlPTR sys32_fcntl /* 6070 */PTR sys_flockPTR sys_fsyncPTR sys_fdatasyncPTR sys_truncatePTR sys_ftruncate /* 6075 */PTR sys32_getdentsPTR sys_getcwdPTR sys_chdirPTR sys_fchdirPTR sys_rename /* 6080 */PTR sys_mkdirPTR sys_rmdirPTR sys_creatPTR sys_linkPTR sys_unlink /* 6085 */PTR sys_symlinkPTR sys_readlinkPTR sys_chmodPTR sys_fchmodPTR sys_chown /* 6090 */PTR sys_fchownPTR sys_lchownPTR sys_umaskPTR sys32_gettimeofdayPTR sys32_getrlimit /* 6095 */PTR sys32_getrusagePTR sys32_sysinfoPTR sys32_timesPTR sys_ptracePTR sys_getuid /* 6100 */PTR sys_syslogPTR sys_getgidPTR sys_setuidPTR sys_setgidPTR sys_geteuid /* 6105 */PTR sys_getegidPTR sys_setpgidPTR sys_getppidPTR sys_getpgrpPTR sys_setsid /* 6110 */PTR sys_setreuidPTR sys_setregidPTR sys_getgroupsPTR sys_setgroupsPTR sys_setresuid /* 6115 */PTR sys_getresuidPTR sys_setresgidPTR sys_getresgidPTR sys_getpgidPTR sys_setfsuid /* 6120 */PTR sys_setfsgidPTR sys_getsidPTR sys_capgetPTR sys_capsetPTR sys32_rt_sigpending /* 6125 */PTR sys32_rt_sigtimedwaitPTR sys32_rt_sigqueueinfoPTR sys32_rt_sigsuspendPTR sys32_sigaltstackPTR sys32_utime /* 6130 */PTR sys_mknodPTR sys32_personalityPTR sys_ustatPTR sys32_statfsPTR sys32_fstatfs /* 6135 */PTR sys_sysfsPTR sys_getpriorityPTR sys_setpriorityPTR sys_sched_setparamPTR sys_sched_getparam /* 6140 */PTR sys_sched_setschedulerPTR sys_sched_getschedulerPTR sys_sched_get_priority_maxPTR sys_sched_get_priority_minPTR sys32_sched_rr_get_interval /* 6145 */PTR sys_mlockPTR sys_munlockPTR sys_mlockallPTR sys_munlockallPTR sys_vhangup /* 6150 */PTR sys_pivot_rootPTR sys32_sysctlPTR sys_prctlPTR sys32_adjtimexPTR sys32_setrlimit /* 6155 */PTR sys_chrootPTR sys_syncPTR sys_acctPTR sys32_settimeofdayPTR sys_mount /* 6160 */PTR sys_umountPTR sys_swaponPTR sys_swapoffPTR sys_rebootPTR sys_sethostname /* 6165 */PTR sys_setdomainnamePTR sys_create_modulePTR sys_init_modulePTR sys_delete_modulePTR sys_get_kernel_syms /* 6170 */PTR sys_query_modulePTR sys_quotactlPTR sys_nfsservctlPTR sys_ni_syscall /* res. for getpmsg */PTR sys_ni_syscall /* 6175 for putpmsg */PTR sys_ni_syscall /* res. for afs_syscall */PTR sys_ni_syscall /* res. for security */PTR sys_gettidPTR sys32_readaheadPTR sys_setxattr /* 6180 */PTR sys_lsetxattrPTR sys_fsetxattrPTR sys_getxattrPTR sys_lgetxattrPTR sys_fgetxattr /* 6185 */PTR sys_listxattrPTR sys_llistxattrPTR sys_flistxattrPTR sys_removexattrPTR sys_lremovexattr /* 6190 */PTR sys_fremovexattrPTR sys_tkillPTR sys_ni_syscallPTR sys_ni_syscall /* res. for futex */PTR sys_ni_syscall /* 6195 rs. sched_setaffinity */PTR sys_ni_syscall /* res. f. sched_getaffinity */PTR sys_cacheflushPTR sys_cachectlPTR sys_sysmipsPTR sys_ni_syscall /* 6200 */PTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscall /* 6205 */PTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscall /* 6210 */PTR sysn32_rt_sigreturnPTR sys_fcntlPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_semtimedop /* 6215 */PTR sys_ni_syscallPTR sys_ni_syscallPTR sys_ni_syscallPTR sys_sendfile64