From 1d67e90f19a7acfd9a05dc59678e7d0c5090bd0d Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Sat, 4 Dec 1999 03:58:56 +0000 Subject: Merge with Linux 2.3.21. --- arch/mips64/kernel/scall_o32.S | 415 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 415 insertions(+) create mode 100644 arch/mips64/kernel/scall_o32.S (limited to 'arch/mips64/kernel/scall_o32.S') diff --git a/arch/mips64/kernel/scall_o32.S b/arch/mips64/kernel/scall_o32.S new file mode 100644 index 000000000..b417303c6 --- /dev/null +++ b/arch/mips64/kernel/scall_o32.S @@ -0,0 +1,415 @@ +/* $Id$ + * + * 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, 1996, 1997, 1998, 1999 by Ralf Baechle + * Copyright (C) 1999 Silicon Graphics, Inc. + * + * 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 +#include +#include +#include +#include +#include +#include + +/* This duplicates the definition from */ +#define PF_TRACESYS 0x00000020 /* tracing system calls */ + +/* This duplicates the definition from */ +#define SIGILL 4 /* Illegal instruction (ANSI). */ + +/* Highest syscall used of any syscall flavour */ +#define MAX_SYSCALL_NO __NR_Linux32 + __NR_Linux_syscalls + + .align 5 +NESTED(handle_sys, PT_SIZE, sp) + .set noat + SAVE_SOME + STI + .set at + + ld t1, PT_EPC(sp) # skip syscall on return + + sltiu t0, v0, MAX_SYSCALL_NO + 1 # check syscall number + daddiu t1, 4 # skip to next instruction + beqz t0, not_o32_scall + sd t1, PT_EPC(sp) + + /* XXX Put both in one cacheline, should save a bit. */ + dsll t0, v0, 3 + ld t2, (sys_call_table - (__NR_Linux * 8))(t0) # syscall routine + lbu t3, (sys_narg_table - __NR_Linux)(v0) # number of arguments + beqz t2, illegal_syscall; + + subu t0, t3, 5 # 5 or more arguments? + sd a3, PT_R26(sp) # save a3 for syscall restarting + bgez t0, stackargs + +stack_done: + ld t0, TASK_FLAGS($28) # syscall tracing enabled? + andi t0, PF_TRACESYS + 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 + + negu v0 # error + sd v0, PT_R0(sp) # set flag for syscall restarting +1: sd v0, PT_R2(sp) # result + +EXPORT(o32_ret_from_sys_call) + .type o32_ret_from_sys_call,@function + ld t0,bh_mask + ld t1,bh_active # unused delay slot + and t0,t1 + bnez t0,o32_handle_bottom_half + +9: ld t0,PT_STATUS(sp) # returning to kernel mode? + andi t1, t0, 0x10 + ld t2, TASK_NEED_RESCHED($28) + beqz t1, o32_return # -> yes + bnez t2, o32_reschedule + lw v0, TASK_SIGPENDING($28) + move a0, zero + beqz v0, o32_return + move a1, sp + SAVE_STATIC + jal do_signal + +o32_return: + RESTORE_SOME + RESTORE_SP + .set mips3 + eret + .set mips0 + +o32_handle_bottom_half: + jal do_bottom_half + b 9b +o32_reschedule: + SAVE_STATIC + jal schedule + b o32_ret_from_sys_call + +/* ------------------------------------------------------------------------ */ + +trace_a_syscall: + SAVE_STATIC + sd t2,PT_R1(sp) + jal syscall_trace + ld t2,PT_R1(sp) + + ld a0, PT_R4(sp) # Restore argument registers + ld a1, PT_R5(sp) + ld a2, PT_R6(sp) + ld a3, PT_R7(sp) + jalr t2 + + li t0, -EMAXERRNO - 1 # error? + sltu t0, t0, v0 + sd t0, PT_R7(sp) # set error flag + beqz t0, 1f + + negu v0 # error + sd v0, PT_R0(sp) # set flag for syscall restarting +1: sd v0, PT_R2(sp) # result + + jal syscall_trace + j ret_from_sys_call + +/* ------------------------------------------------------------------------ */ + + /* + * 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: + ld 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 + + ld t0, PT_R29(sp) # get old user stack pointer + la t1, 3f # copy 1 to 2 arguments + sll t3, t3, 2 + subu t1, t3 + jr t1 + + /* Ok, copy the args from the luser stack to the kernel stack */ +1: lw a5, 20(t0) # argument #6 from usp +2: lw a4, 16(t0) # argument #5 from usp + +3: j stack_done # go back + + .section __ex_table,"a" + PTR 1b, bad_stack + PTR 2b, bad_stack + .previous + + /* + * The stackpointer for a call with more than 4 arguments is bad. + */ +bad_stack: + negu v0 # error + sd v0, PT_R0(sp) + sd v0, PT_R2(sp) + li t0, 1 # set error flag + sd t0, PT_R7(sp) + j ret_from_sys_call + +not_o32_scall: + /* This is not an 32-bit compatibility syscall, pass it on to + the 64-bit syscall handlers. */ + j handle_sys64 + +illegal_syscall: + /* This also isn't a 64-bit syscall, throw an error. */ + li v0, ENOSYS # error + sd v0, PT_R2(sp) + li t0, 1 # set error flag + sd t0, PT_R7(sp) + j ret_from_sys_call + END(handle_sys) + + .macro syscalltable + 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 3 + 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_stat 2 + 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_ni_syscall 0 /* ptrace */ + sys sys_alarm 1 + sys sys_fstat 2 + sys sys_ni_syscall 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_lstat 2 + sys sys_readlink 3 /* 4085 */ + sys sys_uselib 1 + sys sys_swapon 2 + sys sys_reboot 3 + sys old_readdir 3 + sys sys_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 /* sys_ioperm */ + 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 /* sys_ioperm *//* 4110 */ + sys sys_vhangup 0 + sys sys_ni_syscall 0 /* was sys_idle */ + sys sys_ni_syscall 0 /* 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_create_module 2 + sys sys_init_module 5 + sys sys_delete_module 1 + sys sys_get_kernel_syms 1 /* 4130 */ + 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_query_module 5 + 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_pread 4 /* 4200 */ + sys sys_pwrite 4 + sys sys_chown 3 + sys sys_getcwd 2 + sys sys_capget 2 + sys sys_capset 2 /* 4205 */ + sys sys_sigaltstack 0 + sys sys_sendfile 3 + sys sys_ni_syscall 0 + sys sys_ni_syscall 0 + .endm + + .macro sys function, nargs + PTR \function + .endm + +sys_call_table: + syscalltable + + .macro sys function, nargs + .byte \nargs + .endm + +sys_narg_table: + syscalltable -- cgit v1.2.3