📄 scall_64.s
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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, 1996, 1997, 1998, 1999, 2000 by Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, 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_COMPAT#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. */#ifndef CONFIG_MIPS32_COMPAT .set noat SAVE_SOME STI .set at#endif ld t1, PT_EPC(sp) # skip syscall on return subu t0, v0, __NR_Linux # check syscall number sltiu t0, t0, __NR_Linux_syscalls + 1 daddiu t1, 4 # skip to next instruction beqz t0, illegal_syscall sd t1, PT_EPC(sp) dsll t0, v0, 3 # offset into table ld t2, (sys_call_table - (__NR_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) # resultFEXPORT(ret_from_sys_call_64) lw t0, irq_stat # softirq_active lw t1, irq_stat+4 # softirq_mask. unused delay slot and t0, t1 bnez t0, handle_softirq_649: ld t0, PT_STATUS(sp) # returning to kernel mode? andi t1, t0, 0x10 ld t2, TASK_NEED_RESCHED($28) beqz t1, return_64 # -> yes bnez t2, reschedule_64 lw v0, TASK_SIGPENDING($28) move a0, zero beqz v0, return_64 move a1, sp SAVE_STATIC jal do_signalreturn_64: RESTORE_SOME RESTORE_SP .set mips3 eret .set mips0handle_softirq_64: jal do_softirq b 9breschedule_64: SAVE_STATIC jal schedule b ret_from_sys_call_64/* ------------------------------------------------------------------------ */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)sys_call_table: PTR sys_syscall /* 4000 */ PTR sys_exit PTR sys_fork PTR sys_read PTR sys_write PTR sys_open /* 4005 */ PTR sys_close PTR sys_waitpid PTR sys_creat PTR sys_link PTR sys_unlink /* 4010 */ PTR sys_execve PTR sys_chdir PTR sys_time PTR sys_mknod PTR sys_chmod /* 4015 */ PTR sys_lchown PTR sys_ni_syscall PTR sys_stat PTR sys_lseek PTR sys_getpid /* 4020 */ PTR sys_mount PTR sys_oldumount PTR sys_setuid PTR sys_getuid PTR sys_stime /* 4025 */ PTR sys_ni_syscall /* ptrace */ PTR sys_alarm PTR sys_fstat PTR sys_pause PTR sys_utime /* 4030 */ PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_access PTR sys_nice PTR sys_ni_syscall /* 4035 */ PTR sys_sync PTR sys_kill PTR sys_rename PTR sys_mkdir PTR sys_rmdir /* 4040 */ PTR sys_dup PTR sys_pipe PTR sys_times PTR sys_ni_syscall PTR sys_brk /* 4045 */ PTR sys_setgid PTR sys_getgid PTR sys_ni_syscall /* was signal 2 */ PTR sys_geteuid PTR sys_getegid /* 4050 */ PTR sys_acct PTR sys_umount PTR sys_ni_syscall PTR sys_ioctl PTR sys_fcntl /* 4055 */ PTR sys_ni_syscall PTR sys_setpgid PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_umask /* 4060 */ PTR sys_chroot PTR sys_ustat PTR sys_dup2 PTR sys_getppid PTR sys_getpgrp /* 4065 */ PTR sys_setsid PTR sys_sigaction PTR sys_sgetmask PTR sys_ssetmask PTR sys_setreuid /* 4070 */ PTR sys_setregid PTR sys_sigsuspend PTR sys_sigpending PTR sys_sethostname PTR sys_setrlimit /* 4075 */ PTR sys_getrlimit PTR sys_getrusage PTR sys_gettimeofday PTR sys_settimeofday PTR sys_getgroups /* 4080 */ PTR sys_setgroups PTR sys_ni_syscall /* old_select */ PTR sys_symlink PTR sys_lstat PTR sys_readlink /* 4085 */ PTR sys_uselib PTR sys_swapon PTR sys_reboot PTR sys_ni_syscall /* old_readdir */ PTR sys_mmap /* 4090 */ PTR sys_munmap PTR sys_truncate PTR sys_ftruncate PTR sys_fchmod PTR sys_fchown /* 4095 */ PTR sys_getpriority PTR sys_setpriority PTR sys_ni_syscall PTR sys_statfs PTR sys_fstatfs /* 4100 */ PTR sys_ni_syscall /* sys_ioperm */ PTR sys_socketcall PTR sys_syslog PTR sys_setitimer PTR sys_getitimer /* 4105 */ PTR sys_newstat PTR sys_newlstat PTR sys_newfstat PTR sys_ni_syscall PTR sys_ni_syscall /* sys_ioperm *//* 4110 */ PTR sys_vhangup PTR sys_ni_syscall /* was sys_idle */ PTR sys_ni_syscall /* sys_vm86 */ PTR sys_wait4 PTR sys_swapoff /* 4115 */ PTR sys_sysinfo PTR sys_ipc PTR sys_fsync PTR sys_sigreturn PTR sys_clone /* 4120 */ PTR sys_setdomainname PTR sys_newuname PTR sys_ni_syscall /* sys_modify_ldt */ PTR sys_adjtimex PTR sys_mprotect /* 4125 */ PTR sys_sigprocmask PTR sys_create_module PTR sys_init_module PTR sys_delete_module PTR sys_get_kernel_syms /* 4130 */ PTR sys_quotactl PTR sys_getpgid PTR sys_fchdir PTR sys_bdflush PTR sys_sysfs /* 4135 */ PTR sys_personality PTR sys_ni_syscall /* for afs_syscall */ PTR sys_setfsuid PTR sys_setfsgid PTR sys_llseek /* 4140 */ PTR sys_getdents PTR sys_select PTR sys_flock PTR sys_msync PTR sys_readv /* 4145 */ PTR sys_writev PTR sys_cacheflush PTR sys_cachectl PTR sys_sysmips PTR sys_ni_syscall /* 4150 */ PTR sys_getsid PTR sys_fdatasync PTR sys_sysctl PTR sys_mlock PTR sys_munlock /* 4155 */ PTR sys_mlockall PTR sys_munlockall PTR sys_sched_setparam PTR sys_sched_getparam PTR sys_sched_setscheduler /* 4160 */ PTR sys_sched_getscheduler PTR sys_sched_yield PTR sys_sched_get_priority_max PTR sys_sched_get_priority_min PTR sys_sched_rr_get_interval /* 4165 */ PTR sys_nanosleep PTR sys_mremap PTR sys_accept PTR sys_bind PTR sys_connect /* 4170 */ PTR sys_getpeername PTR sys_getsockname PTR sys_getsockopt PTR sys_listen PTR sys_recv /* 4175 */ PTR sys_recvfrom PTR sys_recvmsg PTR sys_send PTR sys_sendmsg PTR sys_sendto /* 4180 */ PTR sys_setsockopt PTR sys_shutdown PTR sys_socket PTR sys_socketpair PTR sys_setresuid /* 4185 */ PTR sys_getresuid PTR sys_query_module PTR sys_poll PTR sys_nfsservctl PTR sys_setresgid /* 4190 */ PTR sys_getresgid PTR sys_prctl PTR sys_rt_sigreturn PTR sys_rt_sigaction PTR sys_rt_sigprocmask /* 4195 */ PTR sys_rt_sigpending PTR sys_rt_sigtimedwait PTR sys_rt_sigqueueinfo PTR sys_rt_sigsuspend PTR sys_pread /* 4200 */ PTR sys_pwrite PTR sys_chown PTR sys_getcwd PTR sys_capget PTR sys_capset /* 4205 */ PTR sys_sigaltstack PTR sys_sendfile PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_pivot_root /* 4210 */ PTR sys_mincore PTR sys_madvise PTR sys_getdents64⌨️ 快捷键说明
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