Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 1992 Ross Biro |
| 7 | * Copyright (C) Linus Torvalds |
| 8 | * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle |
| 9 | * Copyright (C) 1996 David S. Miller |
| 10 | * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com |
| 11 | * Copyright (C) 1999 MIPS Technologies, Inc. |
| 12 | * Copyright (C) 2000 Ulf Carlsson |
| 13 | * |
| 14 | * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit |
| 15 | * binaries. |
| 16 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/compiler.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/mm.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/ptrace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/user.h> |
| 25 | #include <linux/security.h> |
Ralf Baechle | 293c5bd | 2007-07-25 16:19:33 +0100 | [diff] [blame] | 26 | #include <linux/audit.h> |
| 27 | #include <linux/seccomp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Ralf Baechle | f8280c8 | 2005-05-19 12:08:04 +0000 | [diff] [blame] | 29 | #include <asm/byteorder.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/cpu.h> |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 31 | #include <asm/dsp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/fpu.h> |
| 33 | #include <asm/mipsregs.h> |
Ralf Baechle | 101b353 | 2005-10-06 17:39:32 +0100 | [diff] [blame] | 34 | #include <asm/mipsmtregs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/pgtable.h> |
| 36 | #include <asm/page.h> |
| 37 | #include <asm/system.h> |
| 38 | #include <asm/uaccess.h> |
| 39 | #include <asm/bootinfo.h> |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 40 | #include <asm/reg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * Called by kernel/ptrace.c when detaching.. |
| 44 | * |
| 45 | * Make sure single step bits etc are not set. |
| 46 | */ |
| 47 | void ptrace_disable(struct task_struct *child) |
| 48 | { |
| 49 | /* Nothing to do.. */ |
| 50 | } |
| 51 | |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 52 | /* |
| 53 | * Read a general register set. We always use the 64-bit format, even |
| 54 | * for 32-bit kernels and for 32-bit processes on a 64-bit kernel. |
| 55 | * Registers are sign extended to fill the available space. |
| 56 | */ |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 57 | int ptrace_getregs(struct task_struct *child, __s64 __user *data) |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 58 | { |
| 59 | struct pt_regs *regs; |
| 60 | int i; |
| 61 | |
| 62 | if (!access_ok(VERIFY_WRITE, data, 38 * 8)) |
| 63 | return -EIO; |
| 64 | |
Al Viro | 40bc9c6 | 2006-01-12 01:06:07 -0800 | [diff] [blame] | 65 | regs = task_pt_regs(child); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 66 | |
| 67 | for (i = 0; i < 32; i++) |
Atsushi Nemoto | 62b14c2 | 2007-10-26 00:53:02 +0900 | [diff] [blame] | 68 | __put_user((long)regs->regs[i], data + i); |
| 69 | __put_user((long)regs->lo, data + EF_LO - EF_R0); |
| 70 | __put_user((long)regs->hi, data + EF_HI - EF_R0); |
| 71 | __put_user((long)regs->cp0_epc, data + EF_CP0_EPC - EF_R0); |
| 72 | __put_user((long)regs->cp0_badvaddr, data + EF_CP0_BADVADDR - EF_R0); |
| 73 | __put_user((long)regs->cp0_status, data + EF_CP0_STATUS - EF_R0); |
| 74 | __put_user((long)regs->cp0_cause, data + EF_CP0_CAUSE - EF_R0); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | * Write a general register set. As for PTRACE_GETREGS, we always use |
| 81 | * the 64-bit format. On a 32-bit kernel only the lower order half |
| 82 | * (according to endianness) will be used. |
| 83 | */ |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 84 | int ptrace_setregs(struct task_struct *child, __s64 __user *data) |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 85 | { |
| 86 | struct pt_regs *regs; |
| 87 | int i; |
| 88 | |
| 89 | if (!access_ok(VERIFY_READ, data, 38 * 8)) |
| 90 | return -EIO; |
| 91 | |
Al Viro | 40bc9c6 | 2006-01-12 01:06:07 -0800 | [diff] [blame] | 92 | regs = task_pt_regs(child); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 93 | |
| 94 | for (i = 0; i < 32; i++) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 95 | __get_user(regs->regs[i], data + i); |
| 96 | __get_user(regs->lo, data + EF_LO - EF_R0); |
| 97 | __get_user(regs->hi, data + EF_HI - EF_R0); |
| 98 | __get_user(regs->cp0_epc, data + EF_CP0_EPC - EF_R0); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 99 | |
| 100 | /* badvaddr, status, and cause may not be written. */ |
| 101 | |
| 102 | return 0; |
| 103 | } |
| 104 | |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 105 | int ptrace_getfpregs(struct task_struct *child, __u32 __user *data) |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 106 | { |
| 107 | int i; |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 108 | unsigned int tmp; |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 109 | |
| 110 | if (!access_ok(VERIFY_WRITE, data, 33 * 8)) |
| 111 | return -EIO; |
| 112 | |
| 113 | if (tsk_used_math(child)) { |
| 114 | fpureg_t *fregs = get_fpu_regs(child); |
| 115 | for (i = 0; i < 32; i++) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 116 | __put_user(fregs[i], i + (__u64 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 117 | } else { |
| 118 | for (i = 0; i < 32; i++) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 119 | __put_user((__u64) -1, i + (__u64 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 120 | } |
| 121 | |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 122 | __put_user(child->thread.fpu.fcr31, data + 64); |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 123 | |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 124 | preempt_disable(); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 125 | if (cpu_has_fpu) { |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 126 | unsigned int flags; |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 127 | |
Ralf Baechle | 101b353 | 2005-10-06 17:39:32 +0100 | [diff] [blame] | 128 | if (cpu_has_mipsmt) { |
| 129 | unsigned int vpflags = dvpe(); |
| 130 | flags = read_c0_status(); |
| 131 | __enable_fpu(); |
| 132 | __asm__ __volatile__("cfc1\t%0,$0" : "=r" (tmp)); |
| 133 | write_c0_status(flags); |
| 134 | evpe(vpflags); |
| 135 | } else { |
| 136 | flags = read_c0_status(); |
| 137 | __enable_fpu(); |
| 138 | __asm__ __volatile__("cfc1\t%0,$0" : "=r" (tmp)); |
| 139 | write_c0_status(flags); |
| 140 | } |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 141 | } else { |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 142 | tmp = 0; |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 143 | } |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 144 | preempt_enable(); |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 145 | __put_user(tmp, data + 65); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 150 | int ptrace_setfpregs(struct task_struct *child, __u32 __user *data) |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 151 | { |
| 152 | fpureg_t *fregs; |
| 153 | int i; |
| 154 | |
| 155 | if (!access_ok(VERIFY_READ, data, 33 * 8)) |
| 156 | return -EIO; |
| 157 | |
| 158 | fregs = get_fpu_regs(child); |
| 159 | |
| 160 | for (i = 0; i < 32; i++) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 161 | __get_user(fregs[i], i + (__u64 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 162 | |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 163 | __get_user(child->thread.fpu.fcr31, data + 64); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 164 | |
| 165 | /* FIR may not be written. */ |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
Christoph Hellwig | 481bed4 | 2005-11-07 00:59:47 -0800 | [diff] [blame] | 170 | long arch_ptrace(struct task_struct *child, long request, long addr, long data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | int ret; |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | switch (request) { |
| 175 | /* when I and D space are separate, these will need to be fixed. */ |
| 176 | case PTRACE_PEEKTEXT: /* read word at location addr. */ |
Alexey Dobriyan | 7664732 | 2007-07-17 04:03:43 -0700 | [diff] [blame] | 177 | case PTRACE_PEEKDATA: |
| 178 | ret = generic_ptrace_peekdata(child, addr, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | /* Read the word at location addr in the USER area. */ |
| 182 | case PTRACE_PEEKUSR: { |
| 183 | struct pt_regs *regs; |
| 184 | unsigned long tmp = 0; |
| 185 | |
Al Viro | 40bc9c6 | 2006-01-12 01:06:07 -0800 | [diff] [blame] | 186 | regs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | ret = 0; /* Default return value. */ |
| 188 | |
| 189 | switch (addr) { |
| 190 | case 0 ... 31: |
| 191 | tmp = regs->regs[addr]; |
| 192 | break; |
| 193 | case FPR_BASE ... FPR_BASE + 31: |
| 194 | if (tsk_used_math(child)) { |
| 195 | fpureg_t *fregs = get_fpu_regs(child); |
| 196 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 197 | #ifdef CONFIG_32BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | /* |
| 199 | * The odd registers are actually the high |
| 200 | * order bits of the values stored in the even |
| 201 | * registers - unless we're using r2k_switch.S. |
| 202 | */ |
| 203 | if (addr & 1) |
| 204 | tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32); |
| 205 | else |
| 206 | tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff); |
| 207 | #endif |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 208 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | tmp = fregs[addr - FPR_BASE]; |
| 210 | #endif |
| 211 | } else { |
| 212 | tmp = -1; /* FP not yet used */ |
| 213 | } |
| 214 | break; |
| 215 | case PC: |
| 216 | tmp = regs->cp0_epc; |
| 217 | break; |
| 218 | case CAUSE: |
| 219 | tmp = regs->cp0_cause; |
| 220 | break; |
| 221 | case BADVADDR: |
| 222 | tmp = regs->cp0_badvaddr; |
| 223 | break; |
| 224 | case MMHI: |
| 225 | tmp = regs->hi; |
| 226 | break; |
| 227 | case MMLO: |
| 228 | tmp = regs->lo; |
| 229 | break; |
Franck Bui-Huu | 9693a85 | 2007-02-02 17:41:47 +0100 | [diff] [blame] | 230 | #ifdef CONFIG_CPU_HAS_SMARTMIPS |
| 231 | case ACX: |
| 232 | tmp = regs->acx; |
| 233 | break; |
| 234 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | case FPC_CSR: |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 236 | tmp = child->thread.fpu.fcr31; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | break; |
| 238 | case FPC_EIR: { /* implementation / version register */ |
| 239 | unsigned int flags; |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 240 | #ifdef CONFIG_MIPS_MT_SMTC |
| 241 | unsigned int irqflags; |
| 242 | unsigned int mtflags; |
| 243 | #endif /* CONFIG_MIPS_MT_SMTC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 245 | preempt_disable(); |
| 246 | if (!cpu_has_fpu) { |
| 247 | preempt_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | break; |
Atsushi Nemoto | e04582b | 2006-10-09 00:10:01 +0900 | [diff] [blame] | 249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 251 | #ifdef CONFIG_MIPS_MT_SMTC |
| 252 | /* Read-modify-write of Status must be atomic */ |
| 253 | local_irq_save(irqflags); |
| 254 | mtflags = dmt(); |
| 255 | #endif /* CONFIG_MIPS_MT_SMTC */ |
Ralf Baechle | 101b353 | 2005-10-06 17:39:32 +0100 | [diff] [blame] | 256 | if (cpu_has_mipsmt) { |
| 257 | unsigned int vpflags = dvpe(); |
| 258 | flags = read_c0_status(); |
| 259 | __enable_fpu(); |
| 260 | __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp)); |
| 261 | write_c0_status(flags); |
| 262 | evpe(vpflags); |
| 263 | } else { |
| 264 | flags = read_c0_status(); |
| 265 | __enable_fpu(); |
| 266 | __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp)); |
| 267 | write_c0_status(flags); |
| 268 | } |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 269 | #ifdef CONFIG_MIPS_MT_SMTC |
| 270 | emt(mtflags); |
| 271 | local_irq_restore(irqflags); |
| 272 | #endif /* CONFIG_MIPS_MT_SMTC */ |
Ralf Baechle | 101b353 | 2005-10-06 17:39:32 +0100 | [diff] [blame] | 273 | preempt_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | break; |
| 275 | } |
Ralf Baechle | c134a5e | 2005-06-30 09:42:00 +0000 | [diff] [blame] | 276 | case DSP_BASE ... DSP_BASE + 5: { |
| 277 | dspreg_t *dregs; |
| 278 | |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 279 | if (!cpu_has_dsp) { |
| 280 | tmp = 0; |
| 281 | ret = -EIO; |
Christoph Hellwig | 481bed4 | 2005-11-07 00:59:47 -0800 | [diff] [blame] | 282 | goto out; |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 283 | } |
Ralf Baechle | 6c35585 | 2005-12-05 13:47:25 +0000 | [diff] [blame] | 284 | dregs = __get_dsp_regs(child); |
| 285 | tmp = (unsigned long) (dregs[addr - DSP_BASE]); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 286 | break; |
Ralf Baechle | c134a5e | 2005-06-30 09:42:00 +0000 | [diff] [blame] | 287 | } |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 288 | case DSP_CONTROL: |
| 289 | if (!cpu_has_dsp) { |
| 290 | tmp = 0; |
| 291 | ret = -EIO; |
Christoph Hellwig | 481bed4 | 2005-11-07 00:59:47 -0800 | [diff] [blame] | 292 | goto out; |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 293 | } |
| 294 | tmp = child->thread.dsp.dspcontrol; |
| 295 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | default: |
| 297 | tmp = 0; |
| 298 | ret = -EIO; |
Christoph Hellwig | 481bed4 | 2005-11-07 00:59:47 -0800 | [diff] [blame] | 299 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
Ralf Baechle | fe00f94 | 2005-03-01 19:22:29 +0000 | [diff] [blame] | 301 | ret = put_user(tmp, (unsigned long __user *) data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | break; |
| 303 | } |
| 304 | |
| 305 | /* when I and D space are separate, this will have to be fixed. */ |
| 306 | case PTRACE_POKETEXT: /* write the word at location addr. */ |
| 307 | case PTRACE_POKEDATA: |
Alexey Dobriyan | f284ce7 | 2007-07-17 04:03:44 -0700 | [diff] [blame] | 308 | ret = generic_ptrace_pokedata(child, addr, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | break; |
| 310 | |
| 311 | case PTRACE_POKEUSR: { |
| 312 | struct pt_regs *regs; |
| 313 | ret = 0; |
Al Viro | 40bc9c6 | 2006-01-12 01:06:07 -0800 | [diff] [blame] | 314 | regs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | switch (addr) { |
| 317 | case 0 ... 31: |
| 318 | regs->regs[addr] = data; |
| 319 | break; |
| 320 | case FPR_BASE ... FPR_BASE + 31: { |
| 321 | fpureg_t *fregs = get_fpu_regs(child); |
| 322 | |
| 323 | if (!tsk_used_math(child)) { |
| 324 | /* FP not yet used */ |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 325 | memset(&child->thread.fpu, ~0, |
| 326 | sizeof(child->thread.fpu)); |
| 327 | child->thread.fpu.fcr31 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 329 | #ifdef CONFIG_32BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /* |
| 331 | * The odd registers are actually the high order bits |
| 332 | * of the values stored in the even registers - unless |
| 333 | * we're using r2k_switch.S. |
| 334 | */ |
| 335 | if (addr & 1) { |
| 336 | fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff; |
| 337 | fregs[(addr & ~1) - FPR_BASE] |= ((unsigned long long) data) << 32; |
| 338 | } else { |
| 339 | fregs[addr - FPR_BASE] &= ~0xffffffffLL; |
| 340 | fregs[addr - FPR_BASE] |= data; |
| 341 | } |
| 342 | #endif |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 343 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | fregs[addr - FPR_BASE] = data; |
| 345 | #endif |
| 346 | break; |
| 347 | } |
| 348 | case PC: |
| 349 | regs->cp0_epc = data; |
| 350 | break; |
| 351 | case MMHI: |
| 352 | regs->hi = data; |
| 353 | break; |
| 354 | case MMLO: |
| 355 | regs->lo = data; |
| 356 | break; |
Franck Bui-Huu | 9693a85 | 2007-02-02 17:41:47 +0100 | [diff] [blame] | 357 | #ifdef CONFIG_CPU_HAS_SMARTMIPS |
| 358 | case ACX: |
| 359 | regs->acx = data; |
| 360 | break; |
| 361 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | case FPC_CSR: |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 363 | child->thread.fpu.fcr31 = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | break; |
Ralf Baechle | c134a5e | 2005-06-30 09:42:00 +0000 | [diff] [blame] | 365 | case DSP_BASE ... DSP_BASE + 5: { |
| 366 | dspreg_t *dregs; |
| 367 | |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 368 | if (!cpu_has_dsp) { |
| 369 | ret = -EIO; |
| 370 | break; |
| 371 | } |
| 372 | |
Ralf Baechle | c134a5e | 2005-06-30 09:42:00 +0000 | [diff] [blame] | 373 | dregs = __get_dsp_regs(child); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 374 | dregs[addr - DSP_BASE] = data; |
| 375 | break; |
Ralf Baechle | c134a5e | 2005-06-30 09:42:00 +0000 | [diff] [blame] | 376 | } |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 377 | case DSP_CONTROL: |
| 378 | if (!cpu_has_dsp) { |
| 379 | ret = -EIO; |
| 380 | break; |
| 381 | } |
| 382 | child->thread.dsp.dspcontrol = data; |
| 383 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | default: |
| 385 | /* The rest are not allowed. */ |
| 386 | ret = -EIO; |
| 387 | break; |
| 388 | } |
| 389 | break; |
| 390 | } |
| 391 | |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 392 | case PTRACE_GETREGS: |
Atsushi Nemoto | 62b14c2 | 2007-10-26 00:53:02 +0900 | [diff] [blame] | 393 | ret = ptrace_getregs(child, (__s64 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 394 | break; |
| 395 | |
| 396 | case PTRACE_SETREGS: |
Atsushi Nemoto | 62b14c2 | 2007-10-26 00:53:02 +0900 | [diff] [blame] | 397 | ret = ptrace_setregs(child, (__s64 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 398 | break; |
| 399 | |
| 400 | case PTRACE_GETFPREGS: |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 401 | ret = ptrace_getfpregs(child, (__u32 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 402 | break; |
| 403 | |
| 404 | case PTRACE_SETFPREGS: |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 405 | ret = ptrace_setfpregs(child, (__u32 __user *) data); |
Daniel Jacobowitz | ea3d710 | 2005-09-28 18:11:15 -0400 | [diff] [blame] | 406 | break; |
| 407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ |
| 409 | case PTRACE_CONT: { /* restart after signal. */ |
| 410 | ret = -EIO; |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 411 | if (!valid_signal(data)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | break; |
| 413 | if (request == PTRACE_SYSCALL) { |
| 414 | set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| 415 | } |
| 416 | else { |
| 417 | clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| 418 | } |
| 419 | child->exit_code = data; |
| 420 | wake_up_process(child); |
| 421 | ret = 0; |
| 422 | break; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * make the child exit. Best I can do is send it a sigkill. |
| 427 | * perhaps it should be put in the status that it wants to |
| 428 | * exit. |
| 429 | */ |
| 430 | case PTRACE_KILL: |
| 431 | ret = 0; |
| 432 | if (child->exit_state == EXIT_ZOMBIE) /* already dead */ |
| 433 | break; |
| 434 | child->exit_code = SIGKILL; |
| 435 | wake_up_process(child); |
| 436 | break; |
| 437 | |
Ralf Baechle | 3c37026 | 2005-04-13 17:43:59 +0000 | [diff] [blame] | 438 | case PTRACE_GET_THREAD_AREA: |
Al Viro | dc8f602 | 2006-01-12 01:06:07 -0800 | [diff] [blame] | 439 | ret = put_user(task_thread_info(child)->tp_value, |
Ralf Baechle | 3c37026 | 2005-04-13 17:43:59 +0000 | [diff] [blame] | 440 | (unsigned long __user *) data); |
| 441 | break; |
| 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | default: |
| 444 | ret = ptrace_request(child, request, addr, data); |
| 445 | break; |
| 446 | } |
Christoph Hellwig | 481bed4 | 2005-11-07 00:59:47 -0800 | [diff] [blame] | 447 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | return ret; |
| 449 | } |
| 450 | |
Yoichi Yuasa | 67eb81e | 2005-04-29 16:13:35 +0100 | [diff] [blame] | 451 | static inline int audit_arch(void) |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 452 | { |
Ralf Baechle | f8280c8 | 2005-05-19 12:08:04 +0000 | [diff] [blame] | 453 | int arch = EM_MIPS; |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 454 | #ifdef CONFIG_64BIT |
Ralf Baechle | f8280c8 | 2005-05-19 12:08:04 +0000 | [diff] [blame] | 455 | arch |= __AUDIT_ARCH_64BIT; |
| 456 | #endif |
| 457 | #if defined(__LITTLE_ENDIAN) |
| 458 | arch |= __AUDIT_ARCH_LE; |
| 459 | #endif |
| 460 | return arch; |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 461 | } |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | /* |
| 464 | * Notification of system call entry/exit |
| 465 | * - triggered by current->work.syscall_trace |
| 466 | */ |
| 467 | asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit) |
| 468 | { |
Ralf Baechle | 293c5bd | 2007-07-25 16:19:33 +0100 | [diff] [blame] | 469 | /* do the secure computing check first */ |
| 470 | if (!entryexit) |
| 471 | secure_computing(regs->regs[0]); |
| 472 | |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 473 | if (unlikely(current->audit_context) && entryexit) |
Al Viro | 5411be5 | 2006-03-29 20:23:36 -0500 | [diff] [blame] | 474 | audit_syscall_exit(AUDITSC_RESULT(regs->regs[2]), |
Ralf Baechle | f8280c8 | 2005-05-19 12:08:04 +0000 | [diff] [blame] | 475 | regs->regs[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | if (!(current->ptrace & PT_PTRACED)) |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 478 | goto out; |
Ralf Baechle | 293c5bd | 2007-07-25 16:19:33 +0100 | [diff] [blame] | 479 | |
Ralf Baechle | f8280c8 | 2005-05-19 12:08:04 +0000 | [diff] [blame] | 480 | if (!test_thread_flag(TIF_SYSCALL_TRACE)) |
| 481 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | /* The 0x80 provides a way for the tracing parent to distinguish |
| 484 | between a syscall stop and SIGTRAP delivery */ |
| 485 | ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ? |
| 486 | 0x80 : 0)); |
| 487 | |
| 488 | /* |
| 489 | * this isn't the same as continuing with a signal, but it will do |
| 490 | * for normal use. strace only continues with a signal if the |
| 491 | * stopping signal is not SIGTRAP. -brl |
| 492 | */ |
| 493 | if (current->exit_code) { |
| 494 | send_sig(current->exit_code, current, 1); |
| 495 | current->exit_code = 0; |
| 496 | } |
Ralf Baechle | 293c5bd | 2007-07-25 16:19:33 +0100 | [diff] [blame] | 497 | |
| 498 | out: |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 499 | if (unlikely(current->audit_context) && !entryexit) |
Ralf Baechle | 293c5bd | 2007-07-25 16:19:33 +0100 | [diff] [blame] | 500 | audit_syscall_entry(audit_arch(), regs->regs[0], |
| 2fd6f58 | 2005-04-29 16:08:28 +0100 | [diff] [blame] | 501 | regs->regs[4], regs->regs[5], |
| 502 | regs->regs[6], regs->regs[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |