| /* ptrace.c: FRV specific parts of process tracing |
| * |
| * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * - Derived from arch/m68k/kernel/ptrace.c |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/smp.h> |
| #include <linux/errno.h> |
| #include <linux/ptrace.h> |
| #include <linux/user.h> |
| #include <linux/security.h> |
| #include <linux/signal.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/page.h> |
| #include <asm/pgtable.h> |
| #include <asm/system.h> |
| #include <asm/processor.h> |
| #include <asm/unistd.h> |
| |
| /* |
| * does not yet catch signals sent when the child dies. |
| * in exit.c or in signal.c. |
| */ |
| |
| /* |
| * Get contents of register REGNO in task TASK. |
| */ |
| static inline long get_reg(struct task_struct *task, int regno) |
| { |
| struct user_context *user = task->thread.user; |
| |
| if (regno < 0 || regno >= PT__END) |
| return 0; |
| |
| return ((unsigned long *) user)[regno]; |
| } |
| |
| /* |
| * Write contents of register REGNO in task TASK. |
| */ |
| static inline int put_reg(struct task_struct *task, int regno, |
| unsigned long data) |
| { |
| struct user_context *user = task->thread.user; |
| |
| if (regno < 0 || regno >= PT__END) |
| return -EIO; |
| |
| switch (regno) { |
| case PT_GR(0): |
| return 0; |
| case PT_PSR: |
| case PT__STATUS: |
| return -EIO; |
| default: |
| ((unsigned long *) user)[regno] = data; |
| return 0; |
| } |
| } |
| |
| /* |
| * check that an address falls within the bounds of the target process's memory mappings |
| */ |
| static inline int is_user_addr_valid(struct task_struct *child, |
| unsigned long start, unsigned long len) |
| { |
| #ifdef CONFIG_MMU |
| if (start >= PAGE_OFFSET || len > PAGE_OFFSET - start) |
| return -EIO; |
| return 0; |
| #else |
| struct vm_list_struct *vml; |
| |
| for (vml = child->mm->context.vmlist; vml; vml = vml->next) |
| if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end) |
| return 0; |
| |
| return -EIO; |
| #endif |
| } |
| |
| /* |
| * Called by kernel/ptrace.c when detaching.. |
| * |
| * Control h/w single stepping |
| */ |
| void ptrace_disable(struct task_struct *child) |
| { |
| child->thread.frame0->__status &= ~REG__STATUS_STEP; |
| } |
| |
| void ptrace_enable(struct task_struct *child) |
| { |
| child->thread.frame0->__status |= REG__STATUS_STEP; |
| } |
| |
| long arch_ptrace(struct task_struct *child, long request, long addr, long data) |
| { |
| unsigned long tmp; |
| int ret; |
| |
| switch (request) { |
| /* when I and D space are separate, these will need to be fixed. */ |
| case PTRACE_PEEKTEXT: /* read word at location addr. */ |
| case PTRACE_PEEKDATA: |
| ret = -EIO; |
| if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0) |
| break; |
| ret = generic_ptrace_peekdata(child, addr, data); |
| break; |
| |
| /* read the word at location addr in the USER area. */ |
| case PTRACE_PEEKUSR: { |
| tmp = 0; |
| ret = -EIO; |
| if ((addr & 3) || addr < 0) |
| break; |
| |
| ret = 0; |
| switch (addr >> 2) { |
| case 0 ... PT__END - 1: |
| tmp = get_reg(child, addr >> 2); |
| break; |
| |
| case PT__END + 0: |
| tmp = child->mm->end_code - child->mm->start_code; |
| break; |
| |
| case PT__END + 1: |
| tmp = child->mm->end_data - child->mm->start_data; |
| break; |
| |
| case PT__END + 2: |
| tmp = child->mm->start_stack - child->mm->start_brk; |
| break; |
| |
| case PT__END + 3: |
| tmp = child->mm->start_code; |
| break; |
| |
| case PT__END + 4: |
| tmp = child->mm->start_stack; |
| break; |
| |
| default: |
| ret = -EIO; |
| break; |
| } |
| |
| if (ret == 0) |
| ret = put_user(tmp, (unsigned long *) data); |
| break; |
| } |
| |
| /* when I and D space are separate, this will have to be fixed. */ |
| case PTRACE_POKETEXT: /* write the word at location addr. */ |
| case PTRACE_POKEDATA: |
| ret = -EIO; |
| if (is_user_addr_valid(child, addr, sizeof(tmp)) < 0) |
| break; |
| ret = generic_ptrace_pokedata(child, addr, data); |
| break; |
| |
| case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ |
| ret = -EIO; |
| if ((addr & 3) || addr < 0) |
| break; |
| |
| ret = 0; |
| switch (addr >> 2) { |
| case 0 ... PT__END-1: |
| ret = put_reg(child, addr >> 2, data); |
| break; |
| |
| default: |
| ret = -EIO; |
| break; |
| } |
| break; |
| |
| case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ |
| case PTRACE_CONT: /* restart after signal. */ |
| ret = -EIO; |
| if (!valid_signal(data)) |
| break; |
| if (request == PTRACE_SYSCALL) |
| set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| else |
| clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| child->exit_code = data; |
| ptrace_disable(child); |
| wake_up_process(child); |
| ret = 0; |
| break; |
| |
| /* make the child exit. Best I can do is send it a sigkill. |
| * perhaps it should be put in the status that it wants to |
| * exit. |
| */ |
| case PTRACE_KILL: |
| ret = 0; |
| if (child->exit_state == EXIT_ZOMBIE) /* already dead */ |
| break; |
| child->exit_code = SIGKILL; |
| clear_tsk_thread_flag(child, TIF_SINGLESTEP); |
| ptrace_disable(child); |
| wake_up_process(child); |
| break; |
| |
| case PTRACE_SINGLESTEP: /* set the trap flag. */ |
| ret = -EIO; |
| if (!valid_signal(data)) |
| break; |
| clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| ptrace_enable(child); |
| child->exit_code = data; |
| wake_up_process(child); |
| ret = 0; |
| break; |
| |
| case PTRACE_DETACH: /* detach a process that was attached. */ |
| ret = ptrace_detach(child, data); |
| break; |
| |
| case PTRACE_GETREGS: { /* Get all integer regs from the child. */ |
| int i; |
| for (i = 0; i < PT__GPEND; i++) { |
| tmp = get_reg(child, i); |
| if (put_user(tmp, (unsigned long *) data)) { |
| ret = -EFAULT; |
| break; |
| } |
| data += sizeof(long); |
| } |
| ret = 0; |
| break; |
| } |
| |
| case PTRACE_SETREGS: { /* Set all integer regs in the child. */ |
| int i; |
| for (i = 0; i < PT__GPEND; i++) { |
| if (get_user(tmp, (unsigned long *) data)) { |
| ret = -EFAULT; |
| break; |
| } |
| put_reg(child, i, tmp); |
| data += sizeof(long); |
| } |
| ret = 0; |
| break; |
| } |
| |
| case PTRACE_GETFPREGS: { /* Get the child FP/Media state. */ |
| ret = 0; |
| if (copy_to_user((void *) data, |
| &child->thread.user->f, |
| sizeof(child->thread.user->f))) |
| ret = -EFAULT; |
| break; |
| } |
| |
| case PTRACE_SETFPREGS: { /* Set the child FP/Media state. */ |
| ret = 0; |
| if (copy_from_user(&child->thread.user->f, |
| (void *) data, |
| sizeof(child->thread.user->f))) |
| ret = -EFAULT; |
| break; |
| } |
| |
| case PTRACE_GETFDPIC: |
| tmp = 0; |
| switch (addr) { |
| case PTRACE_GETFDPIC_EXEC: |
| tmp = child->mm->context.exec_fdpic_loadmap; |
| break; |
| case PTRACE_GETFDPIC_INTERP: |
| tmp = child->mm->context.interp_fdpic_loadmap; |
| break; |
| default: |
| break; |
| } |
| |
| ret = 0; |
| if (put_user(tmp, (unsigned long *) data)) { |
| ret = -EFAULT; |
| break; |
| } |
| break; |
| |
| default: |
| ret = -EIO; |
| break; |
| } |
| return ret; |
| } |
| |
| int __nongprelbss kstrace; |
| |
| static const struct { |
| const char *name; |
| unsigned argmask; |
| } __syscall_name_table[NR_syscalls] = { |
| [0] = { "restart_syscall" }, |
| [1] = { "exit", 0x000001 }, |
| [2] = { "fork", 0xffffff }, |
| [3] = { "read", 0x000141 }, |
| [4] = { "write", 0x000141 }, |
| [5] = { "open", 0x000235 }, |
| [6] = { "close", 0x000001 }, |
| [7] = { "waitpid", 0x000141 }, |
| [8] = { "creat", 0x000025 }, |
| [9] = { "link", 0x000055 }, |
| [10] = { "unlink", 0x000005 }, |
| [11] = { "execve", 0x000445 }, |
| [12] = { "chdir", 0x000005 }, |
| [13] = { "time", 0x000004 }, |
| [14] = { "mknod", 0x000325 }, |
| [15] = { "chmod", 0x000025 }, |
| [16] = { "lchown", 0x000025 }, |
| [17] = { "break" }, |
| [18] = { "oldstat", 0x000045 }, |
| [19] = { "lseek", 0x000131 }, |
| [20] = { "getpid", 0xffffff }, |
| [21] = { "mount", 0x043555 }, |
| [22] = { "umount", 0x000005 }, |
| [23] = { "setuid", 0x000001 }, |
| [24] = { "getuid", 0xffffff }, |
| [25] = { "stime", 0x000004 }, |
| [26] = { "ptrace", 0x004413 }, |
| [27] = { "alarm", 0x000001 }, |
| [28] = { "oldfstat", 0x000041 }, |
| [29] = { "pause", 0xffffff }, |
| [30] = { "utime", 0x000045 }, |
| [31] = { "stty" }, |
| [32] = { "gtty" }, |
| [33] = { "access", 0x000025 }, |
| [34] = { "nice", 0x000001 }, |
| [35] = { "ftime" }, |
| [36] = { "sync", 0xffffff }, |
| [37] = { "kill", 0x000011 }, |
| [38] = { "rename", 0x000055 }, |
| [39] = { "mkdir", 0x000025 }, |
| [40] = { "rmdir", 0x000005 }, |
| [41] = { "dup", 0x000001 }, |
| [42] = { "pipe", 0x000004 }, |
| [43] = { "times", 0x000004 }, |
| [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; |
| } |
| } |
