scall_64.s
来自「linux-2.4.29操作系统的源码」· S 代码 · 共 353 行
S
353 行
/* * 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>#include <asm/offset.h>#ifndef CONFIG_BINFMT_ELF32/* Neither O32 nor N32, so define handle_sys here */#define handle_sys64 handle_sys#endif .align 5NESTED(handle_sys64, PT_SIZE, sp)/* When 32-bit compatibility is configured scall_o32.S already did this. */#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32) .set noat SAVE_SOME STI .set at#endif subu t0, v0, __NR_64_Linux # check syscall number sltiu t0, t0, __NR_64_Linux_syscalls + 1#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32) ld t1, PT_EPC(sp) # skip syscall on return daddiu t1, 4 # skip to next instruction sd t1, PT_EPC(sp)#endif beqz t0, illegal_syscall dsll t0, v0, 3 # offset into table ld t2, (sys_call_table - (__NR_64_Linux * 8))(t0) # syscall routine sd a3, PT_R26(sp) # save a3 for syscall restarting ld t0, TASK_PTRACE($28) # syscall tracing enabled? andi t0, _PT_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 restarting1: sd v0, PT_R2(sp) # resultret_from_sys_call: mfc0 t0, CP0_STATUS ori t0, t0, 1 xori t0, t0, 1 mtc0 t0, CP0_STATUS SSNOP; SSNOP; SSNOP ld t2, TASK_NEED_RESCHED($28) bnez t2, _64_reschedule lw v0, TASK_SIGPENDING($28) bnez v0, signal_returnrestore_all: RESTORE_SOME RESTORE_SP eret/* Put this behind restore_all for the sake of the branch prediction. */signal_return: .type signal_return, @function mfc0 t0, CP0_STATUS ori t0, t0, 1 mtc0 t0, CP0_STATUS SAVE_STATIC move a0, zero move a1, sp jal do_signal RESTORE_STATIC b restore_all_64_reschedule: SAVE_STATIC jal schedule b 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 restarting1: sd v0, PT_R2(sp) # result jal syscall_trace j ret_from_sys_callillegal_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_sys64) .align 3sys_call_table: PTR sys_read /* 5000 */ PTR sys_write PTR sys_open PTR sys_close PTR sys_newstat PTR sys_newfstat /* 5005 */ PTR sys_newlstat PTR sys_poll PTR sys_lseek PTR sys_mmap PTR sys_mprotect /* 5010 */ PTR sys_munmap PTR sys_brk PTR sys_rt_sigaction PTR sys_rt_sigprocmask PTR sys_ioctl /* 5015 */ PTR sys_pread PTR sys_pwrite PTR sys_readv PTR sys_writev PTR sys_access /* 5020 */ PTR sys_pipe PTR sys_select PTR sys_sched_yield PTR sys_mremap PTR sys_msync /* 5025 */ PTR sys_mincore PTR sys_madvise PTR sys_shmget PTR sys_shmat PTR sys_shmctl /* 5030 */ PTR sys_dup PTR sys_dup2 PTR sys_pause PTR sys_nanosleep PTR sys_getitimer /* 5035 */ PTR sys_setitimer PTR sys_alarm PTR sys_getpid PTR sys_sendfile PTR sys_socket /* 5040 */ PTR sys_connect PTR sys_accept PTR sys_sendto PTR sys_recvfrom PTR sys_sendmsg /* 5045 */ PTR sys_recvmsg PTR sys_shutdown PTR sys_bind PTR sys_listen PTR sys_getsockname /* 5050 */ PTR sys_getpeername PTR sys_socketpair PTR sys_setsockopt PTR sys_getsockopt PTR sys_clone /* 5055 */ PTR sys_fork PTR sys_execve PTR sys_exit PTR sys_wait4 PTR sys_kill /* 5060 */ PTR sys_newuname PTR sys_semget PTR sys_semop PTR sys_semctl PTR sys_shmdt /* 5065 */ PTR sys_msgget PTR sys_msgsnd PTR sys_msgrcv PTR sys_msgctl PTR sys_fcntl /* 5070 */ PTR sys_flock PTR sys_fsync PTR sys_fdatasync PTR sys_truncate PTR sys_ftruncate /* 5075 */ PTR sys_getdents PTR sys_getcwd PTR sys_chdir PTR sys_fchdir PTR sys_rename /* 5080 */ PTR sys_mkdir PTR sys_rmdir PTR sys_creat PTR sys_link PTR sys_unlink /* 5085 */ PTR sys_symlink PTR sys_readlink PTR sys_chmod PTR sys_fchmod PTR sys_chown /* 5090 */ PTR sys_fchown PTR sys_lchown PTR sys_umask PTR sys_gettimeofday PTR sys_getrlimit /* 5095 */ PTR sys_getrusage PTR sys_sysinfo PTR sys_times PTR sys_ptrace PTR sys_getuid /* 5100 */ PTR sys_syslog PTR sys_getgid PTR sys_setuid PTR sys_setgid PTR sys_geteuid /* 5105 */ PTR sys_getegid PTR sys_setpgid PTR sys_getppid PTR sys_getpgrp PTR sys_setsid /* 5110 */ PTR sys_setreuid PTR sys_setregid PTR sys_getgroups PTR sys_setgroups PTR sys_setresuid /* 5115 */ PTR sys_getresuid PTR sys_setresgid PTR sys_getresgid PTR sys_getpgid PTR sys_setfsuid /* 5120 */ PTR sys_setfsgid PTR sys_getsid PTR sys_capget PTR sys_capset PTR sys_rt_sigpending /* 5125 */ PTR sys_rt_sigtimedwait PTR sys_rt_sigqueueinfo PTR sys_rt_sigsuspend PTR sys_sigaltstack PTR sys_utime /* 5130 */ PTR sys_mknod PTR sys_personality PTR sys_ustat PTR sys_statfs PTR sys_fstatfs /* 5135 */ PTR sys_sysfs PTR sys_getpriority PTR sys_setpriority PTR sys_sched_setparam PTR sys_sched_getparam /* 5140 */ PTR sys_sched_setscheduler PTR sys_sched_getscheduler PTR sys_sched_get_priority_max PTR sys_sched_get_priority_min PTR sys_sched_rr_get_interval /* 5145 */ PTR sys_mlock PTR sys_munlock PTR sys_mlockall PTR sys_munlockall PTR sys_vhangup /* 5150 */ PTR sys_pivot_root PTR sys_sysctl PTR sys_prctl PTR sys_adjtimex PTR sys_setrlimit /* 5155 */ PTR sys_chroot PTR sys_sync PTR sys_acct PTR sys_settimeofday PTR sys_mount /* 5160 */ PTR sys_umount PTR sys_swapon PTR sys_swapoff PTR sys_reboot PTR sys_sethostname /* 5165 */ PTR sys_setdomainname PTR sys_create_module PTR sys_init_module PTR sys_delete_module PTR sys_get_kernel_syms /* 5170 */ PTR sys_query_module PTR sys_quotactl PTR sys_nfsservctl PTR sys_ni_syscall /* res. for getpmsg */ PTR sys_ni_syscall /* 5175 for putpmsg */ PTR sys_ni_syscall /* res. for afs_syscall */ PTR sys_ni_syscall /* res. for security */ PTR sys_gettid PTR sys_readahead PTR sys_setxattr /* 5180 */ PTR sys_lsetxattr PTR sys_fsetxattr PTR sys_getxattr PTR sys_lgetxattr PTR sys_fgetxattr /* 5185 */ PTR sys_listxattr PTR sys_llistxattr PTR sys_flistxattr PTR sys_removexattr PTR sys_lremovexattr /* 5190 */ PTR sys_fremovexattr PTR sys_tkill PTR sys_ni_syscall PTR sys_ni_syscall /* res. for futex */ PTR sys_ni_syscall /* 5195 rs. sched_setaffinity */ PTR sys_ni_syscall /* res. f. sched_getaffinity */ PTR sys_cacheflush PTR sys_cachectl PTR sys_sysmips PTR sys_ni_syscall /* 5200 */ PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall /* 5205 */ PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_ni_syscall /* 5210 */ PTR sys_rt_sigreturn PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_semtimedop⌨️ 快捷键说明
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