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\ stq $0,0($30); \ stq $1,8($30); \ stq $2,16($30); \ stq $3,24($30); \ stq $4,32($30); \ lda $2,hae; \ stq $5,40($30); \ stq $6,48($30); \ stq $7,56($30); \ stq $8,64($30); \ stq $19,72($30); \ stq $20,80($30); \ stq $21,88($30); \ ldq $2,HAE_CACHE($2); \ stq $22,96($30); \ stq $23,104($30); \ stq $24,112($30); \ stq $25,120($30); \ stq $26,128($30); \ stq $27,136($30); \ stq $28,144($30); \ stq $2,152($30); \ stq $16,160($30); \ stq $17,168($30); \ stq $18,176($30) #define RESTORE_ALL \ lda $19,hae; \ ldq $0,0($30); \ ldq $1,8($30); \ ldq $2,16($30); \ ldq $3,24($30); \ ldq $20,152($30); \ ldq $21,HAE_CACHE($19); \ ldq $4,32($30); \ ldq $5,40($30); \ ldq $6,48($30); \ ldq $7,56($30); \ subq $20,$21,$20; \ ldq $8,64($30); \ beq $20,99f; \ ldq $20,HAE_REG($19); \ addq $31,7,$16; \ call_pal PAL_swpipl; \ stq $21,HAE_CACHE($19); \ stq $21,0($20); \ bis $0,$0,$16; \ call_pal PAL_swpipl; \ ldq $0,0($30); \ ldq $1,8($30); \ 99:; \ ldq $19,72($30); \ ldq $20,80($30); \ ldq $21,88($30); \ ldq $22,96($30); \ ldq $23,104($30); \ ldq $24,112($30); \ ldq $25,120($30); \ ldq $26,128($30); \ ldq $27,136($30); \ ldq $28,144($30); \ addq $30,184,$30 .text .set noat #if defined(__linux__) && !defined(__ELF__) .set singlegp #endif .align 3 .globl entInt .ent entInt entInt: SAVE_ALL lda $8,0x3fff bic $30,$8,$8 jsr $26,do_entInt br $31,ret_from_sys_call .end entInt .align 3 .globl entMM .ent entMM entMM: SAVE_ALL /* save $9 - $15 so the inline exception code can manipulate them. */ subq $30,56,$30 stq $9,0($30) stq $10,8($30) stq $11,16($30) stq $12,24($30) stq $13,32($30) stq $14,40($30) stq $15,48($30) addq $30,56,$19 /* handle the fault */ lda $8,0x3fff bic $30,$8,$8 jsr $26,do_page_fault /* reload the registers after the exception code played. */ ldq $9,0($30) ldq $10,8($30) ldq $11,16($30) ldq $12,24($30) ldq $13,32($30) ldq $14,40($30) ldq $15,48($30) addq $30,56,$30 /* finish up the syscall as normal. */ br ret_from_sys_call .end entMM .align 3 .globl entArith .ent entArith entArith: SAVE_ALL lda $8,0x3fff bic $30,$8,$8 /* How much of a win is this clockwise? We are, after all, messing up the call/return prefetch stack. -- rth */ lda $27,do_entArith lda $26,ret_from_sys_call jsr $31,($27),do_entArith .end entArith .align 3 .globl entIF .ent entIF entIF: SAVE_ALL lda $8,0x3fff bic $30,$8,$8 lda $27,do_entIF lda $26,ret_from_sys_call jsr $31,($27),do_entIF .end entIF /* * Fork() is one of the special system calls: it needs to * save the callee-saved regs so that the regs can be found * for the new process.. We save them in the "context switch" * stack format (see arch/alpha/kernel/process.c). * * Also, for the kernel fork, we need to fake the system call * stack buildup, as we can't do system calls from kernel space. */ .align 3 .ent kernel_clone kernel_clone: .frame $30, 0, $26 .prologue 0 subq $30,6*8,$30 stq $31,0($30) stq $26,8($30) stq $29,16($30) stq $16,24($30) stq $17,32($30) stq $18,40($30) bis $31,2,$0 /* Register v0: syscall nr for fork() */ SAVE_ALL jsr $26,sys_clone stq $0,0($30) br $31,ret_from_sys_call .end kernel_clone /* * __kernel_thread(clone_flags, fn, arg) */ .align 3 .globl __kernel_thread .ent __kernel_thread __kernel_thread: ldgp $29,0($27) /* we can be called from a module */ .frame $30, 4*8, $26 subq $30,4*8,$30 stq $10,16($30) stq $9,8($30) stq $26,0($30) .prologue 1 bis $17,$17,$9 /* save fn */ bis $18,$18,$10 /* save arg */ bsr $26,kernel_clone bne $20,1f /* $20 is non-zero in child */ ldq $26,0($30) ldq $9,8($30) ldq $10,16($30) addq $30,4*8,$30 ret $31,($26),1 /* this is in child: look out as we don't have any stack here.. */ 1: bis $9,$9,$27 /* get fn */ lda $8,0x3fff bis $10,$10,$16 /* get arg */ bic $30,$8,$8 /* get current */ jsr $26,($27) ldgp $29,0($26) bis $0,$0,$16 jsr $26,sys_exit call_pal PAL_halt .end __kernel_thread .align 3 .ent do_switch_stack do_switch_stack: lda $30,-SWITCH_STACK_SIZE($30) stq $9,0($30) stq $10,8($30) stq $11,16($30) stq $12,24($30) stq $13,32($30) stq $14,40($30) stq $15,48($30) stq $26,56($30) stt $f0,64($30) stt $f1,72($30) stt $f2,80($30) stt $f3,88($30) stt $f4,96($30) stt $f5,104($30) stt $f6,112($30) stt $f7,120($30) stt $f8,128($30) stt $f9,136($30) stt $f10,144($30) stt $f11,152($30) stt $f12,160($30) stt $f13,168($30) stt $f14,176($30) stt $f15,184($30) stt $f16,192($30) stt $f17,200($30) stt $f18,208($30) stt $f19,216($30) stt $f20,224($30) stt $f21,232($30) stt $f22,240($30) stt $f23,248($30) stt $f24,256($30) stt $f25,264($30) stt $f26,272($30) stt $f27,280($30) mf_fpcr $f0 # get fpcr stt $f28,288($30) stt $f29,296($30) stt $f30,304($30) stt $f0,312($30) # save fpcr in slot of $f31 ret $31,($1),1 .end do_switch_stack .align 3 .ent undo_switch_stack undo_switch_stack: ldq $9,0($30) ldq $10,8($30) ldq $11,16($30) ldq $12,24($30) ldq $13,32($30) ldq $14,40($30) ldq $15,48($30) ldq $26,56($30) ldt $f30,312($30) # get saved fpcr ldt $f0,64($30) ldt $f1,72($30) ldt $f2,80($30) ldt $f3,88($30) mt_fpcr $f30 # install saved fpcr ldt $f4,96($30) ldt $f5,104($30) ldt $f6,112($30) ldt $f7,120($30) ldt $f8,128($30) ldt $f9,136($30) ldt $f10,144($30) ldt $f11,152($30) ldt $f12,160($30) ldt $f13,168($30) ldt $f14,176($30) ldt $f15,184($30) ldt $f16,192($30) ldt $f17,200($30) ldt $f18,208($30) ldt $f19,216($30) ldt $f20,224($30) ldt $f21,232($30) ldt $f22,240($30) ldt $f23,248($30) ldt $f24,256($30) ldt $f25,264($30) ldt $f26,272($30) ldt $f27,280($30) ldt $f28,288($30) ldt $f29,296($30) ldt $f30,304($30) lda $30,SWITCH_STACK_SIZE($30) ret $31,($1),1 .end undo_switch_stack .align 3 .globl entUna .ent entUna entUna: lda $30,-256($30) stq $0,0($30) ldq $0,256($30) /* get PS */ stq $1,8($30) stq $2,16($30) stq $3,24($30) and $0,8,$0 /* user mode? */ stq $4,32($30) bne $0,entUnaUser /* yup -> do user-level unaligned fault */ stq $5,40($30) stq $6,48($30) stq $7,56($30) stq $8,64($30) stq $9,72($30) stq $10,80($30) stq $11,88($30) stq $12,96($30) stq $13,104($30) stq $14,112($30) stq $15,120($30) /* 16-18 PAL-saved */ stq $19,152($30) stq $20,160($30) stq $21,168($30) stq $22,176($30) stq $23,184($30) stq $24,192($30) stq $25,200($30) stq $26,208($30) stq $27,216($30) stq $28,224($30) stq $29,232($30) stq $30,240($30) stq $31,248($30) lda $8,0x3fff bic $30,$8,$8 jsr $26,do_entUna ldq $0,0($30) ldq $1,8($30) ldq $2,16($30) ldq $3,24($30) ldq $4,32($30) ldq $5,40($30) ldq $6,48($30) ldq $7,56($30) ldq $8,64($30) ldq $9,72($30) ldq $10,80($30) ldq $11,88($30) ldq $12,96($30) ldq $13,104($30) ldq $14,112($30) ldq $15,120($30) /* 16-18 PAL-saved */ ldq $19,152($30) ldq $20,160($30) ldq $21,168($30) ldq $22,176($30) ldq $23,184($30) ldq $24,192($30) ldq $25,200($30) ldq $26,208($30) ldq $27,216($30) ldq $28,224($30) ldq $29,232($30) ldq $30,240($30) lda $30,256($30) rti .end entUna .align 3 .ent entUnaUser entUnaUser: ldq $0,0($30) /* restore original $0 */ lda $30,256($30) /* pop entUna's stack frame */ SAVE_ALL /* setup normal kernel stack */ lda $30,-56($30) stq $9,0($30) stq $10,8($30) stq $11,16($30) stq $12,24($30) stq $13,32($30) stq $14,40($30) stq $15,48($30) lda $8,0x3fff addq $30,56,$19 bic $30,$8,$8 jsr $26,do_entUnaUser ldq $9,0($30) ldq $10,8($30) ldq $11,16($30) ldq $12,24($30) ldq $13,32($30) ldq $14,40($30) ldq $15,48($30) lda $30,56($30) br $31,ret_from_sys_call .end entUnaUser /* * A fork is the same as clone(SIGCHLD, 0); */ .align 3 .globl sys_fork .ent sys_fork sys_fork: bsr $1,do_switch_stack bis $31,SIGCHLD,$16 bis $31,$31,$17 bis $30,$30,$18 jsr $26,alpha_clone bsr $1,undo_switch_stack ret $31,($26),1 .end sys_fork .align 3 .globl sys_clone .ent sys_clone sys_clone: bsr $1,do_switch_stack /* arg1 and arg2 come from the user */ bis $30,$30,$18 jsr $26,alpha_clone bsr $1,undo_switch_stack ret $31,($26),1 .end sys_clone .align 3 .globl alpha_switch_to .ent alpha_switch_to alpha_switch_to: bsr $1,do_switch_stack call_pal PAL_swpctx bsr $1,undo_switch_stack ret $31,($26),1 .end alpha_switch_to /* * Oh, well.. Disassembling OSF/1 binaries to find out how the * system calls work isn't much fun. * * entSys is special in that the PAL-code doesn't save a0-a2, so * we start off by doing that by hand. */ .align 3 .globl entSys .globl ret_from_sys_call .ent entSys entSys: SAVE_ALL lda $8,0x3fff bic $30,$8,$8 lda $4,NR_SYSCALLS($31) stq $16,SP_OFF+24($30) lda $5,sys_call_table lda $27,do_entSys cmpult $0,$4,$4 ldq $3,TASK_FLAGS($8) stq $17,SP_OFF+32($30) s8addq $0,$5,$5 and $3,PF_PTRACED,$3 stq $18,SP_OFF+40($30) bne $3,strace beq $4,1f ldq $27,0($5) 1: jsr $26,($27),do_entSys ldgp $29,0($26) blt $0,syscall_error /* the call failed */ stq $0,0($30) stq $31,72($30) /* a3=0 => no error */ .align 3 ret_from_sys_call: cmovne $26,0,$19 /* $19 = 0 => non-restartable */ /* check bottom half interrupts */ bne $1,ret_from_handle_bh ldq $3,bh_active ldq $4,bh_mask and $3,$4,$2 bne $2,handle_bottom_half ret_from_handle_bh: ldq $0,SP_OFF($30) and $0,8,$0 beq $0,restore_all ret_from_reschedule: lda $0,need_resched ldl $2,0($0) lda $4,init_task_union bne $2,reschedule xor $4,$8,$4 beq $4,restore_all ldq $4,TASK_SIGNAL($8) ldq $16,TASK_BLOCKED($8) bic $4,$16,$4 bne $4,signal_return restore_all: RESTORE_ALL rti /* PTRACE syscall handler */ .align 3 strace: /* set up signal stack, call syscall_trace */ bsr $1,do_switch_stack jsr $26,syscall_trace bsr $1,undo_switch_stack /* get the system call number and the arguments back.. */ ldq $0,0($30) ldq $16,SP_OFF+24($30) ldq $17,SP_OFF+32($30) ldq $18,SP_OFF+40($30) ldq $19,72($30) ldq $20,80($30) ldq $21,88($30) /* get the system call pointer.. */ lda $1,NR_SYSCALLS($31) lda $2,sys_call_table lda $27,do_entSys cmpult $0,$1,$1 s8addq $0,$2,$2 beq $1,1f ldq $27,0($2) 1: jsr $26,($27),do_entSys ldgp $29,0($26) /* check return.. */ blt $0,strace_error /* the call failed */ stq $31,72($30) /* a3=0 => no error */ strace_success: stq $0,0($30) /* save return value */ bsr $1,do_switch_stack jsr $26,syscall_trace bsr $1,undo_switch_stack br $31,ret_from_sys_call .align 3 strace_error: ldq $19,0($30) /* old syscall nr (zero if success) */ beq $19,strace_success ldq $20,72($30) /* .. and this a3 */ subq $31,$0,$0 /* with error in v0 */ addq $31,1,$1 /* set a3 for errno return */ stq $0,0($30) stq $1,72($30) /* a3 for return */ bsr $1,do_switch_stack bis $19,$19,$9 /* save old syscall number */ bis $20,$20,$10 /* save old a3 */ jsr $26,syscall_trace bis $9,$9,$19 bis $10,$10,$20 bsr $1,undo_switch_stack bis $31,$31,$26 /* tell "ret_from_sys_call" that we can restart */ br $31,ret_from_sys_call .align 3 handle_bottom_half: subq $30,16,$30 stq $19,0($30) /* save syscall nr */ stq $20,8($30) /* and error indication (a3) */ jsr $26,do_bottom_half ldq $19,0($30) ldq $20,8($30) addq $30,16,$30 br $31,ret_from_handle_bh .align 3 syscall_error: /* * Some system calls (e.g., ptrace) can return arbitrary * values which might normally be mistaken as error numbers. * Those functions must zero $0 (v0) directly in the stack * frame to indicate that a negative return value wasn't an * error number.. */ ldq $19,0($30) /* old syscall nr (zero if success) */ beq $19,ret_success ldq $20,72($30) /* .. and this a3 */ subq $31,$0,$0 /* with error in v0 */ addq $31,1,$1 /* set a3 for errno return */ stq $0,0($30) bis $31,$31,$26 /* tell "ret_from_sys_call" we can restart */ stq $1,72($30) /* a3 for return */ br $31,ret_from_sys_call ret_success: stq $0,0($30) stq $31,72($30) /* a3=0 => no error */ br $31,ret_from_sys_call .align 3 signal_return: bis $30,$30,$17 br $1,do_switch_stack bis $30,$30,$18 jsr $26,do_signal lda $30,SWITCH_STACK_SIZE($30) br $31,restore_all .end entSys .align 3 .ent reschedule reschedule: subq $30,16,$30 stq $19,0($30) /* save syscall nr */ stq $20,8($30) /* and error indication (a3) */ jsr $26,schedule ldq $19,0($30) ldq $20,8($30) addq $30,16,$30 br $31,ret_from_reschedule .end reschedule .align 3 .ent sys_sigreturn sys_sigreturn: bis $30,$30,$17 lda $30,-SWITCH_STACK_SIZE($30) bis $30,$30,$18 jsr $26,do_sigreturn br $1,undo_switch_stack br $31,ret_from_sys_call .end sys_sigreturn .align 3 .ent sys_sigsuspend sys_sigsuspend: bis $30,$30,$17 br $1,do_switch_stack bis $30,$30,$18 jsr $26,do_sigsuspend lda $30,SWITCH_STACK_SIZE($30) br $31,ret_from_sys_call .end sys_sigsuspend .align 3 .globl sys_call_table sys_call_table: /*0*/ .quad do_entSys, sys_exit, sys_fork, sys_read, sys_write .quad do_entSys, sys_close, sys_wait4, do_entSys, sys_link .quad sys_unlink, do_entSys, sys_chdir, sys_fchdir, sys_mknod .quad sys_chmod, sys_chown, osf_brk, do_entSys, sys_lseek .quad sys_getxpid, osf_mount, osf_umount, sys_setuid, sys_getxuid .quad do_entSys, sys_ptrace, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, sys_access, do_entSys .quad do_entSys, sys_sync, sys_kill, do_entSys, sys_setpgid .quad do_entSys, sys_dup, sys_pipe, osf_set_program_attributes, do_entSys .quad sys_open, do_entSys, sys_getxgid, osf_sigprocmask, do_entSys /*50*/ .quad do_entSys, sys_acct, sys_sigpending, do_entSys, sys_ioctl .quad do_entSys, do_entSys, sys_symlink, sys_readlink, sys_execve .quad sys_umask, sys_chroot, do_entSys, sys_getpgrp, sys_getpagesize .quad do_entSys, osf_vfork, sys_newstat, sys_newlstat, do_entSys .quad do_entSys, osf_mmap, do_entSys, sys_munmap, sys_mprotect .quad sys_madvise, sys_vhangup, do_entSys, do_entSys, sys_getgroups /* map BSD's setpgrp to sys_setpgid for binary compatibility: */ .quad sys_setgroups, do_entSys, sys_setpgid, sys_setitimer, do_entSys .quad do_entSys, sys_getitimer, sys_gethostname, sys_sethostname, sys_getdtablesize .quad sys_dup2, sys_newfstat, sys_fcntl, sys_select, sys_poll .quad sys_fsync, sys_setpriority, sys_socket, sys_connect, sys_accept /*100*/ .quad osf_getpriority, sys_send, sys_recv, sys_sigreturn, sys_bind .quad sys_setsockopt, sys_listen, do_entSys, do_entSys, do_entSys .quad do_entSys, sys_sigsuspend, do_entSys, sys_recvmsg, sys_sendmsg .quad do_entSys, sys_gettimeofday, sys_getrusage, sys_getsockopt, do_entSys .quad sys_readv, sys_writev, sys_settimeofday, sys_fchown, sys_fchmod .quad sys_recvfrom, sys_setreuid, sys_setregid, sys_rename, sys_truncate .quad sys_ftruncate, sys_flock, sys_setgid, sys_sendto, sys_shutdown .quad sys_socketpair, sys_mkdir, sys_rmdir, sys_utimes, do_entSys .quad do_entSys, sys_getpeername, do_entSys, do_entSys, sys_getrlimit .quad sys_setrlimit, do_entSys, sys_setsid, sys_quotactl, do_entSys /*150*/ .quad sys_getsockname, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, sys_sigaction, do_entSys, do_entSys, osf_getdirentries .quad osf_statfs, osf_fstatfs, do_entSys, do_entSys, do_entSys .quad osf_getdomainname, sys_setdomainname, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, osf_swapon /*200*/ .quad sys_msgctl, sys_msgget, sys_msgrcv, sys_msgsnd, sys_semctl .quad sys_semget, sys_semop, osf_utsname, do_entSys, osf_shmat .quad sys_shmctl, sys_shmdt, sys_shmget, do_entSys, do_entSys .quad do_entSys, do_entSys, sys_msync, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, sys_getpgid, sys_getsid .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, osf_sysinfo, do_entSys, do_entSys, osf_proplist_syscall .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys /*250*/ .quad do_entSys, osf_usleep_thread, do_entSys, do_entSys, sys_sysfs .quad do_entSys, osf_getsysinfo, osf_setsysinfo, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys .quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys /* linux-specific system calls start at 300 */ /*300*/ .quad sys_bdflush, sys_sethae, sys_mount, sys_adjtimex, sys_swapoff .quad sys_getdents, alpha_create_module, sys_init_module, sys_delete_module, sys_get_kernel_syms .quad sys_syslog, sys_reboot, sys_clone, sys_uselib, sys_mlock .quad sys_munlock, sys_mlockall, sys_munlockall, sys_sysinfo, sys_sysctl .quad sys_idle, sys_umount, sys_swapon, sys_times, sys_personality .quad sys_setfsuid, sys_setfsgid, sys_ustat, sys_statfs, sys_fstatfs .quad sys_sched_setparam, sys_sched_getparam, sys_sched_setscheduler, sys_sched_getscheduler, sys_sched_yield .quad sys_sched_get_priority_max, sys_sched_get_priority_min, sys_sched_rr_get_interval, do_entSys /* sys_afs_syscall */, sys_newuname .quad sys_nanosleep, sys_mremap, sys_nfsservctl, sys_setresuid, sys_getresuid .quad sys_pciconfig_read, sys_pciconfig_write, sys_query_module .quad sys_prctl, sys_pread, sys_pwrite .quad do_entSys, do_entSys |