ptrace.c

linux 内核源代码

	[44]	= { "prof" },
	[45]	= { "brk",		0x000004	},
	[46]	= { "setgid",		0x000001	},
	[47]	= { "getgid",		0xffffff	},
	[48]	= { "signal",		0x000041	},
	[49]	= { "geteuid",		0xffffff	},
	[50]	= { "getegid",		0xffffff	},
	[51]	= { "acct",		0x000005	},
	[52]	= { "umount2",		0x000035	},
	[53]	= { "lock" },
	[54]	= { "ioctl",		0x000331	},
	[55]	= { "fcntl",		0x000331	},
	[56]	= { "mpx" },
	[57]	= { "setpgid",		0x000011	},
	[58]	= { "ulimit" },
	[60]	= { "umask",		0x000002	},
	[61]	= { "chroot",		0x000005	},
	[62]	= { "ustat",		0x000043	},
	[63]	= { "dup2",		0x000011	},
	[64]	= { "getppid",		0xffffff	},
	[65]	= { "getpgrp",		0xffffff	},
	[66]	= { "setsid",		0xffffff	},
	[67]	= { "sigaction" },
	[68]	= { "sgetmask" },
	[69]	= { "ssetmask" },
	[70]	= { "setreuid" },
	[71]	= { "setregid" },
	[72]	= { "sigsuspend" },
	[73]	= { "sigpending" },
	[74]	= { "sethostname" },
	[75]	= { "setrlimit" },
	[76]	= { "getrlimit" },
	[77]	= { "getrusage" },
	[78]	= { "gettimeofday" },
	[79]	= { "settimeofday" },
	[80]	= { "getgroups" },
	[81]	= { "setgroups" },
	[82]	= { "select" },
	[83]	= { "symlink" },
	[84]	= { "oldlstat" },
	[85]	= { "readlink" },
	[86]	= { "uselib" },
	[87]	= { "swapon" },
	[88]	= { "reboot" },
	[89]	= { "readdir" },
	[91]	= { "munmap",		0x000034	},
	[92]	= { "truncate" },
	[93]	= { "ftruncate" },
	[94]	= { "fchmod" },
	[95]	= { "fchown" },
	[96]	= { "getpriority" },
	[97]	= { "setpriority" },
	[99]	= { "statfs" },
	[100]	= { "fstatfs" },
	[102]	= { "socketcall" },
	[103]	= { "syslog" },
	[104]	= { "setitimer" },
	[105]	= { "getitimer" },
	[106]	= { "stat" },
	[107]	= { "lstat" },
	[108]	= { "fstat" },
	[111]	= { "vhangup" },
	[114]	= { "wait4" },
	[115]	= { "swapoff" },
	[116]	= { "sysinfo" },
	[117]	= { "ipc" },
	[118]	= { "fsync" },
	[119]	= { "sigreturn" },
	[120]	= { "clone" },
	[121]	= { "setdomainname" },
	[122]	= { "uname" },
	[123]	= { "modify_ldt" },
	[123]	= { "cacheflush" },
	[124]	= { "adjtimex" },
	[125]	= { "mprotect" },
	[126]	= { "sigprocmask" },
	[127]	= { "create_module" },
	[128]	= { "init_module" },
	[129]	= { "delete_module" },
	[130]	= { "get_kernel_syms" },
	[131]	= { "quotactl" },
	[132]	= { "getpgid" },
	[133]	= { "fchdir" },
	[134]	= { "bdflush" },
	[135]	= { "sysfs" },
	[136]	= { "personality" },
	[137]	= { "afs_syscall" },
	[138]	= { "setfsuid" },
	[139]	= { "setfsgid" },
	[140]	= { "_llseek",			0x014331	},
	[141]	= { "getdents" },
	[142]	= { "_newselect",		0x000141	},
	[143]	= { "flock" },
	[144]	= { "msync" },
	[145]	= { "readv" },
	[146]	= { "writev" },
	[147]	= { "getsid",			0x000001	},
	[148]	= { "fdatasync",		0x000001	},
	[149]	= { "_sysctl",			0x000004	},
	[150]	= { "mlock" },
	[151]	= { "munlock" },
	[152]	= { "mlockall" },
	[153]	= { "munlockall" },
	[154]	= { "sched_setparam" },
	[155]	= { "sched_getparam" },
	[156]	= { "sched_setscheduler" },
	[157]	= { "sched_getscheduler" },
	[158]	= { "sched_yield" },
	[159]	= { "sched_get_priority_max" },
	[160]	= { "sched_get_priority_min" },
	[161]	= { "sched_rr_get_interval" },
	[162]	= { "nanosleep",		0x000044	},
	[163]	= { "mremap" },
	[164]	= { "setresuid" },
	[165]	= { "getresuid" },
	[166]	= { "vm86" },
	[167]	= { "query_module" },
	[168]	= { "poll" },
	[169]	= { "nfsservctl" },
	[170]	= { "setresgid" },
	[171]	= { "getresgid" },
	[172]	= { "prctl",			0x333331	},
	[173]	= { "rt_sigreturn",		0xffffff	},
	[174]	= { "rt_sigaction",		0x001441	},
	[175]	= { "rt_sigprocmask",		0x001441	},
	[176]	= { "rt_sigpending",		0x000014	},
	[177]	= { "rt_sigtimedwait",		0x001444	},
	[178]	= { "rt_sigqueueinfo",		0x000411	},
	[179]	= { "rt_sigsuspend",		0x000014	},
	[180]	= { "pread",			0x003341	},
	[181]	= { "pwrite",			0x003341	},
	[182]	= { "chown",			0x000115	},
	[183]	= { "getcwd" },
	[184]	= { "capget" },
	[185]	= { "capset" },
	[186]	= { "sigaltstack" },
	[187]	= { "sendfile" },
	[188]	= { "getpmsg" },
	[189]	= { "putpmsg" },
	[190]	= { "vfork",			0xffffff	},
	[191]	= { "ugetrlimit" },
	[192]	= { "mmap2",			0x313314	},
	[193]	= { "truncate64" },
	[194]	= { "ftruncate64" },
	[195]	= { "stat64",			0x000045	},
	[196]	= { "lstat64",			0x000045	},
	[197]	= { "fstat64",			0x000041	},
	[198]	= { "lchown32" },
	[199]	= { "getuid32",			0xffffff	},
	[200]	= { "getgid32",			0xffffff	},
	[201]	= { "geteuid32",		0xffffff	},
	[202]	= { "getegid32",		0xffffff	},
	[203]	= { "setreuid32" },
	[204]	= { "setregid32" },
	[205]	= { "getgroups32" },
	[206]	= { "setgroups32" },
	[207]	= { "fchown32" },
	[208]	= { "setresuid32" },
	[209]	= { "getresuid32" },
	[210]	= { "setresgid32" },
	[211]	= { "getresgid32" },
	[212]	= { "chown32" },
	[213]	= { "setuid32" },
	[214]	= { "setgid32" },
	[215]	= { "setfsuid32" },
	[216]	= { "setfsgid32" },
	[217]	= { "pivot_root" },
	[218]	= { "mincore" },
	[219]	= { "madvise" },
	[220]	= { "getdents64" },
	[221]	= { "fcntl64" },
	[223]	= { "security" },
	[224]	= { "gettid" },
	[225]	= { "readahead" },
	[226]	= { "setxattr" },
	[227]	= { "lsetxattr" },
	[228]	= { "fsetxattr" },
	[229]	= { "getxattr" },
	[230]	= { "lgetxattr" },
	[231]	= { "fgetxattr" },
	[232]	= { "listxattr" },
	[233]	= { "llistxattr" },
	[234]	= { "flistxattr" },
	[235]	= { "removexattr" },
	[236]	= { "lremovexattr" },
	[237]	= { "fremovexattr" },
	[238]	= { "tkill" },
	[239]	= { "sendfile64" },
	[240]	= { "futex" },
	[241]	= { "sched_setaffinity" },
	[242]	= { "sched_getaffinity" },
	[243]	= { "set_thread_area" },
	[244]	= { "get_thread_area" },
	[245]	= { "io_setup" },
	[246]	= { "io_destroy" },
	[247]	= { "io_getevents" },
	[248]	= { "io_submit" },
	[249]	= { "io_cancel" },
	[250]	= { "fadvise64" },
	[252]	= { "exit_group",		0x000001	},
	[253]	= { "lookup_dcookie" },
	[254]	= { "epoll_create" },
	[255]	= { "epoll_ctl" },
	[256]	= { "epoll_wait" },
	[257]	= { "remap_file_pages" },
	[258]	= { "set_tid_address" },
	[259]	= { "timer_create" },
	[260]	= { "timer_settime" },
	[261]	= { "timer_gettime" },
	[262]	= { "timer_getoverrun" },
	[263]	= { "timer_delete" },
	[264]	= { "clock_settime" },
	[265]	= { "clock_gettime" },
	[266]	= { "clock_getres" },
	[267]	= { "clock_nanosleep" },
	[268]	= { "statfs64" },
	[269]	= { "fstatfs64" },
	[270]	= { "tgkill" },
	[271]	= { "utimes" },
	[272]	= { "fadvise64_64" },
	[273]	= { "vserver" },
	[274]	= { "mbind" },
	[275]	= { "get_mempolicy" },
	[276]	= { "set_mempolicy" },
	[277]	= { "mq_open" },
	[278]	= { "mq_unlink" },
	[279]	= { "mq_timedsend" },
	[280]	= { "mq_timedreceive" },
	[281]	= { "mq_notify" },
	[282]	= { "mq_getsetattr" },
	[283]	= { "sys_kexec_load" },
};

asmlinkage void do_syscall_trace(int leaving)
{
#if 0
	unsigned long *argp;
	const char *name;
	unsigned argmask;
	char buffer[16];

	if (!kstrace)
		return;

	if (!current->mm)
		return;

	if (__frame->gr7 == __NR_close)
		return;

#if 0
	if (__frame->gr7 != __NR_mmap2 &&
	    __frame->gr7 != __NR_vfork &&
	    __frame->gr7 != __NR_execve &&
	    __frame->gr7 != __NR_exit)
		return;
#endif

	argmask = 0;
	name = NULL;
	if (__frame->gr7 < NR_syscalls) {
		name = __syscall_name_table[__frame->gr7].name;
		argmask = __syscall_name_table[__frame->gr7].argmask;
	}
	if (!name) {
		sprintf(buffer, "sys_%lx", __frame->gr7);
		name = buffer;
	}

	if (!leaving) {
		if (!argmask) {
			printk(KERN_CRIT "[%d] %s(%lx,%lx,%lx,%lx,%lx,%lx)\n",
			       current->pid,
			       name,
			       __frame->gr8,
			       __frame->gr9,
			       __frame->gr10,
			       __frame->gr11,
			       __frame->gr12,
			       __frame->gr13);
		}
		else if (argmask == 0xffffff) {
			printk(KERN_CRIT "[%d] %s()\n",
			       current->pid,
			       name);
		}
		else {
			printk(KERN_CRIT "[%d] %s(",
			       current->pid,
			       name);

			argp = &__frame->gr8;

			do {
				switch (argmask & 0xf) {
				case 1:
					printk("%ld", (long) *argp);
					break;
				case 2:
					printk("%lo", *argp);
					break;
				case 3:
					printk("%lx", *argp);
					break;
				case 4:
					printk("%p", (void *) *argp);
					break;
				case 5:
					printk("\"%s\"", (char *) *argp);
					break;
				}

				argp++;
				argmask >>= 4;
				if (argmask)
					printk(",");

			} while (argmask);

			printk(")\n");
		}
	}
	else {
		if ((int)__frame->gr8 > -4096 && (int)__frame->gr8 < 4096)
			printk(KERN_CRIT "[%d] %s() = %ld\n", current->pid, name, __frame->gr8);
		else
			printk(KERN_CRIT "[%d] %s() = %lx\n", current->pid, name, __frame->gr8);
	}
	return;
#endif

	if (!test_thread_flag(TIF_SYSCALL_TRACE))
		return;

	if (!(current->ptrace & PT_PTRACED))
		return;

	/* we need to indicate entry or exit to strace */
	if (leaving)
		__frame->__status |= REG__STATUS_SYSC_EXIT;
	else
		__frame->__status |= REG__STATUS_SYSC_ENTRY;

	ptrace_notify(SIGTRAP);

	/*
	 * this isn't the same as continuing with a signal, but it will do
	 * for normal use.  strace only continues with a signal if the
	 * stopping signal is not SIGTRAP.  -brl
	 */
	if (current->exit_code) {
		send_sig(current->exit_code, current, 1);
		current->exit_code = 0;
	}
}