Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* ptrace.c: Sparc process tracing support. |
| 2 | * |
| 3 | * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) |
| 4 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| 5 | * |
| 6 | * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson, |
| 7 | * and David Mosberger. |
| 8 | * |
| 9 | * Added Linux support -miguel (weird, eh?, the original code was meant |
| 10 | * to emulate SunOS). |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/mm.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/ptrace.h> |
| 18 | #include <linux/user.h> |
| 19 | #include <linux/smp.h> |
| 20 | #include <linux/smp_lock.h> |
| 21 | #include <linux/security.h> |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 22 | #include <linux/seccomp.h> |
| 23 | #include <linux/audit.h> |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 24 | #include <linux/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #include <asm/asi.h> |
| 27 | #include <asm/pgtable.h> |
| 28 | #include <asm/system.h> |
| 29 | #include <asm/uaccess.h> |
| 30 | #include <asm/psrcompat.h> |
| 31 | #include <asm/visasm.h> |
| 32 | #include <asm/spitfire.h> |
David S. Miller | 6a9b490 | 2005-09-19 20:11:57 -0700 | [diff] [blame] | 33 | #include <asm/page.h> |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 34 | #include <asm/cpudata.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | /* Returning from ptrace is a bit tricky because the syscall return |
| 37 | * low level code assumes any value returned which is negative and |
| 38 | * is a valid errno will mean setting the condition codes to indicate |
| 39 | * an error return. This doesn't work, so we have this hook. |
| 40 | */ |
| 41 | static inline void pt_error_return(struct pt_regs *regs, unsigned long error) |
| 42 | { |
| 43 | regs->u_regs[UREG_I0] = error; |
| 44 | regs->tstate |= (TSTATE_ICARRY | TSTATE_XCARRY); |
| 45 | regs->tpc = regs->tnpc; |
| 46 | regs->tnpc += 4; |
| 47 | } |
| 48 | |
| 49 | static inline void pt_succ_return(struct pt_regs *regs, unsigned long value) |
| 50 | { |
| 51 | regs->u_regs[UREG_I0] = value; |
| 52 | regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); |
| 53 | regs->tpc = regs->tnpc; |
| 54 | regs->tnpc += 4; |
| 55 | } |
| 56 | |
| 57 | static inline void |
| 58 | pt_succ_return_linux(struct pt_regs *regs, unsigned long value, void __user *addr) |
| 59 | { |
| 60 | if (test_thread_flag(TIF_32BIT)) { |
| 61 | if (put_user(value, (unsigned int __user *) addr)) { |
| 62 | pt_error_return(regs, EFAULT); |
| 63 | return; |
| 64 | } |
| 65 | } else { |
| 66 | if (put_user(value, (long __user *) addr)) { |
| 67 | pt_error_return(regs, EFAULT); |
| 68 | return; |
| 69 | } |
| 70 | } |
| 71 | regs->u_regs[UREG_I0] = 0; |
| 72 | regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); |
| 73 | regs->tpc = regs->tnpc; |
| 74 | regs->tnpc += 4; |
| 75 | } |
| 76 | |
| 77 | static void |
| 78 | pt_os_succ_return (struct pt_regs *regs, unsigned long val, void __user *addr) |
| 79 | { |
| 80 | if (current->personality == PER_SUNOS) |
| 81 | pt_succ_return (regs, val); |
| 82 | else |
| 83 | pt_succ_return_linux (regs, val, addr); |
| 84 | } |
| 85 | |
| 86 | /* #define ALLOW_INIT_TRACING */ |
| 87 | /* #define DEBUG_PTRACE */ |
| 88 | |
| 89 | #ifdef DEBUG_PTRACE |
| 90 | char *pt_rq [] = { |
| 91 | /* 0 */ "TRACEME", "PEEKTEXT", "PEEKDATA", "PEEKUSR", |
| 92 | /* 4 */ "POKETEXT", "POKEDATA", "POKEUSR", "CONT", |
| 93 | /* 8 */ "KILL", "SINGLESTEP", "SUNATTACH", "SUNDETACH", |
| 94 | /* 12 */ "GETREGS", "SETREGS", "GETFPREGS", "SETFPREGS", |
| 95 | /* 16 */ "READDATA", "WRITEDATA", "READTEXT", "WRITETEXT", |
| 96 | /* 20 */ "GETFPAREGS", "SETFPAREGS", "unknown", "unknown", |
| 97 | /* 24 */ "SYSCALL", "" |
| 98 | }; |
| 99 | #endif |
| 100 | |
| 101 | /* |
| 102 | * Called by kernel/ptrace.c when detaching.. |
| 103 | * |
| 104 | * Make sure single step bits etc are not set. |
| 105 | */ |
| 106 | void ptrace_disable(struct task_struct *child) |
| 107 | { |
| 108 | /* nothing to do */ |
| 109 | } |
| 110 | |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 111 | /* To get the necessary page struct, access_process_vm() first calls |
| 112 | * get_user_pages(). This has done a flush_dcache_page() on the |
| 113 | * accessed page. Then our caller (copy_{to,from}_user_page()) did |
| 114 | * to memcpy to read/write the data from that page. |
| 115 | * |
| 116 | * Now, the only thing we have to do is: |
| 117 | * 1) flush the D-cache if it's possible than an illegal alias |
| 118 | * has been created |
| 119 | * 2) flush the I-cache if this is pre-cheetah and we did a write |
| 120 | */ |
| 121 | void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, |
| 122 | unsigned long uaddr, void *kaddr, |
| 123 | unsigned long len, int write) |
| 124 | { |
| 125 | BUG_ON(len > PAGE_SIZE); |
| 126 | |
David S. Miller | 7adb37f | 2006-02-17 15:07:43 -0800 | [diff] [blame] | 127 | if (tlb_type == hypervisor) |
| 128 | return; |
| 129 | |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 130 | #ifdef DCACHE_ALIASING_POSSIBLE |
| 131 | /* If bit 13 of the kernel address we used to access the |
| 132 | * user page is the same as the virtual address that page |
| 133 | * is mapped to in the user's address space, we can skip the |
| 134 | * D-cache flush. |
| 135 | */ |
David S. Miller | 6a9b490 | 2005-09-19 20:11:57 -0700 | [diff] [blame] | 136 | if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) { |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 137 | unsigned long start = __pa(kaddr); |
| 138 | unsigned long end = start + len; |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 139 | unsigned long dcache_line_size; |
| 140 | |
| 141 | dcache_line_size = local_cpu_data().dcache_line_size; |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 142 | |
| 143 | if (tlb_type == spitfire) { |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 144 | for (; start < end; start += dcache_line_size) |
David S. Miller | 6a9b490 | 2005-09-19 20:11:57 -0700 | [diff] [blame] | 145 | spitfire_put_dcache_tag(start & 0x3fe0, 0x0); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 146 | } else { |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 147 | start &= ~(dcache_line_size - 1); |
| 148 | for (; start < end; start += dcache_line_size) |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 149 | __asm__ __volatile__( |
| 150 | "stxa %%g0, [%0] %1\n\t" |
| 151 | "membar #Sync" |
| 152 | : /* no outputs */ |
David S. Miller | 6a9b490 | 2005-09-19 20:11:57 -0700 | [diff] [blame] | 153 | : "r" (start), |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 154 | "i" (ASI_DCACHE_INVALIDATE)); |
| 155 | } |
| 156 | } |
| 157 | #endif |
| 158 | if (write && tlb_type == spitfire) { |
| 159 | unsigned long start = (unsigned long) kaddr; |
| 160 | unsigned long end = start + len; |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 161 | unsigned long icache_line_size; |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 162 | |
David S. Miller | 717463d | 2005-09-29 18:50:34 -0700 | [diff] [blame] | 163 | icache_line_size = local_cpu_data().icache_line_size; |
| 164 | |
| 165 | for (; start < end; start += icache_line_size) |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 166 | flushi(start); |
| 167 | } |
| 168 | } |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | asmlinkage void do_ptrace(struct pt_regs *regs) |
| 171 | { |
| 172 | int request = regs->u_regs[UREG_I0]; |
| 173 | pid_t pid = regs->u_regs[UREG_I1]; |
| 174 | unsigned long addr = regs->u_regs[UREG_I2]; |
| 175 | unsigned long data = regs->u_regs[UREG_I3]; |
| 176 | unsigned long addr2 = regs->u_regs[UREG_I4]; |
| 177 | struct task_struct *child; |
| 178 | int ret; |
| 179 | |
| 180 | if (test_thread_flag(TIF_32BIT)) { |
| 181 | addr &= 0xffffffffUL; |
| 182 | data &= 0xffffffffUL; |
| 183 | addr2 &= 0xffffffffUL; |
| 184 | } |
| 185 | lock_kernel(); |
| 186 | #ifdef DEBUG_PTRACE |
| 187 | { |
| 188 | char *s; |
| 189 | |
| 190 | if ((request >= 0) && (request <= 24)) |
| 191 | s = pt_rq [request]; |
| 192 | else |
| 193 | s = "unknown"; |
| 194 | |
| 195 | if (request == PTRACE_POKEDATA && data == 0x91d02001){ |
| 196 | printk ("do_ptrace: breakpoint pid=%d, addr=%016lx addr2=%016lx\n", |
| 197 | pid, addr, addr2); |
| 198 | } else |
| 199 | printk("do_ptrace: rq=%s(%d) pid=%d addr=%016lx data=%016lx addr2=%016lx\n", |
| 200 | s, request, pid, addr, data, addr2); |
| 201 | } |
| 202 | #endif |
| 203 | if (request == PTRACE_TRACEME) { |
Christoph Hellwig | 6b9c7ed | 2006-01-08 01:02:33 -0800 | [diff] [blame] | 204 | ret = ptrace_traceme(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | pt_succ_return(regs, 0); |
| 206 | goto out; |
| 207 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Christoph Hellwig | 6b9c7ed | 2006-01-08 01:02:33 -0800 | [diff] [blame] | 209 | child = ptrace_get_task_struct(pid); |
| 210 | if (IS_ERR(child)) { |
| 211 | ret = PTR_ERR(child); |
| 212 | pt_error_return(regs, -ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | goto out; |
| 214 | } |
| 215 | |
| 216 | if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH) |
| 217 | || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) { |
| 218 | if (ptrace_attach(child)) { |
| 219 | pt_error_return(regs, EPERM); |
| 220 | goto out_tsk; |
| 221 | } |
| 222 | pt_succ_return(regs, 0); |
| 223 | goto out_tsk; |
| 224 | } |
| 225 | |
| 226 | ret = ptrace_check_attach(child, request == PTRACE_KILL); |
| 227 | if (ret < 0) { |
| 228 | pt_error_return(regs, -ret); |
| 229 | goto out_tsk; |
| 230 | } |
| 231 | |
| 232 | if (!(test_thread_flag(TIF_32BIT)) && |
| 233 | ((request == PTRACE_READDATA64) || |
| 234 | (request == PTRACE_WRITEDATA64) || |
| 235 | (request == PTRACE_READTEXT64) || |
| 236 | (request == PTRACE_WRITETEXT64) || |
| 237 | (request == PTRACE_PEEKTEXT64) || |
| 238 | (request == PTRACE_POKETEXT64) || |
| 239 | (request == PTRACE_PEEKDATA64) || |
| 240 | (request == PTRACE_POKEDATA64))) { |
| 241 | addr = regs->u_regs[UREG_G2]; |
| 242 | addr2 = regs->u_regs[UREG_G3]; |
| 243 | request -= 30; /* wheee... */ |
| 244 | } |
| 245 | |
| 246 | switch(request) { |
David S. Miller | 1759e58 | 2006-04-01 23:28:10 -0800 | [diff] [blame] | 247 | case PTRACE_PEEKUSR: |
| 248 | if (addr != 0) |
| 249 | pt_error_return(regs, EIO); |
| 250 | else |
| 251 | pt_succ_return(regs, 0); |
| 252 | goto out_tsk; |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | case PTRACE_PEEKTEXT: /* read word at location addr. */ |
| 255 | case PTRACE_PEEKDATA: { |
| 256 | unsigned long tmp64; |
| 257 | unsigned int tmp32; |
| 258 | int res, copied; |
| 259 | |
| 260 | res = -EIO; |
| 261 | if (test_thread_flag(TIF_32BIT)) { |
| 262 | copied = access_process_vm(child, addr, |
| 263 | &tmp32, sizeof(tmp32), 0); |
| 264 | tmp64 = (unsigned long) tmp32; |
| 265 | if (copied == sizeof(tmp32)) |
| 266 | res = 0; |
| 267 | } else { |
| 268 | copied = access_process_vm(child, addr, |
| 269 | &tmp64, sizeof(tmp64), 0); |
| 270 | if (copied == sizeof(tmp64)) |
| 271 | res = 0; |
| 272 | } |
| 273 | if (res < 0) |
| 274 | pt_error_return(regs, -res); |
| 275 | else |
| 276 | pt_os_succ_return(regs, tmp64, (void __user *) data); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 277 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | case PTRACE_POKETEXT: /* write the word at location addr. */ |
| 281 | case PTRACE_POKEDATA: { |
| 282 | unsigned long tmp64; |
| 283 | unsigned int tmp32; |
| 284 | int copied, res = -EIO; |
| 285 | |
| 286 | if (test_thread_flag(TIF_32BIT)) { |
| 287 | tmp32 = data; |
| 288 | copied = access_process_vm(child, addr, |
| 289 | &tmp32, sizeof(tmp32), 1); |
| 290 | if (copied == sizeof(tmp32)) |
| 291 | res = 0; |
| 292 | } else { |
| 293 | tmp64 = data; |
| 294 | copied = access_process_vm(child, addr, |
| 295 | &tmp64, sizeof(tmp64), 1); |
| 296 | if (copied == sizeof(tmp64)) |
| 297 | res = 0; |
| 298 | } |
| 299 | if (res < 0) |
| 300 | pt_error_return(regs, -res); |
| 301 | else |
| 302 | pt_succ_return(regs, res); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 303 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | case PTRACE_GETREGS: { |
| 307 | struct pt_regs32 __user *pregs = |
| 308 | (struct pt_regs32 __user *) addr; |
Al Viro | 26ecbde | 2006-01-12 01:05:43 -0800 | [diff] [blame] | 309 | struct pt_regs *cregs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | int rval; |
| 311 | |
| 312 | if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) || |
| 313 | __put_user(cregs->tpc, (&pregs->pc)) || |
| 314 | __put_user(cregs->tnpc, (&pregs->npc)) || |
| 315 | __put_user(cregs->y, (&pregs->y))) { |
| 316 | pt_error_return(regs, EFAULT); |
| 317 | goto out_tsk; |
| 318 | } |
| 319 | for (rval = 1; rval < 16; rval++) |
| 320 | if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { |
| 321 | pt_error_return(regs, EFAULT); |
| 322 | goto out_tsk; |
| 323 | } |
| 324 | pt_succ_return(regs, 0); |
| 325 | #ifdef DEBUG_PTRACE |
| 326 | printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]); |
| 327 | #endif |
| 328 | goto out_tsk; |
| 329 | } |
| 330 | |
| 331 | case PTRACE_GETREGS64: { |
| 332 | struct pt_regs __user *pregs = (struct pt_regs __user *) addr; |
Al Viro | 26ecbde | 2006-01-12 01:05:43 -0800 | [diff] [blame] | 333 | struct pt_regs *cregs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | unsigned long tpc = cregs->tpc; |
| 335 | int rval; |
| 336 | |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 337 | if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | tpc &= 0xffffffff; |
| 339 | if (__put_user(cregs->tstate, (&pregs->tstate)) || |
| 340 | __put_user(tpc, (&pregs->tpc)) || |
| 341 | __put_user(cregs->tnpc, (&pregs->tnpc)) || |
| 342 | __put_user(cregs->y, (&pregs->y))) { |
| 343 | pt_error_return(regs, EFAULT); |
| 344 | goto out_tsk; |
| 345 | } |
| 346 | for (rval = 1; rval < 16; rval++) |
| 347 | if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { |
| 348 | pt_error_return(regs, EFAULT); |
| 349 | goto out_tsk; |
| 350 | } |
| 351 | pt_succ_return(regs, 0); |
| 352 | #ifdef DEBUG_PTRACE |
| 353 | printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]); |
| 354 | #endif |
| 355 | goto out_tsk; |
| 356 | } |
| 357 | |
| 358 | case PTRACE_SETREGS: { |
| 359 | struct pt_regs32 __user *pregs = |
| 360 | (struct pt_regs32 __user *) addr; |
Al Viro | 26ecbde | 2006-01-12 01:05:43 -0800 | [diff] [blame] | 361 | struct pt_regs *cregs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | unsigned int psr, pc, npc, y; |
| 363 | int i; |
| 364 | |
| 365 | /* Must be careful, tracing process can only set certain |
| 366 | * bits in the psr. |
| 367 | */ |
| 368 | if (__get_user(psr, (&pregs->psr)) || |
| 369 | __get_user(pc, (&pregs->pc)) || |
| 370 | __get_user(npc, (&pregs->npc)) || |
| 371 | __get_user(y, (&pregs->y))) { |
| 372 | pt_error_return(regs, EFAULT); |
| 373 | goto out_tsk; |
| 374 | } |
| 375 | cregs->tstate &= ~(TSTATE_ICC); |
| 376 | cregs->tstate |= psr_to_tstate_icc(psr); |
| 377 | if (!((pc | npc) & 3)) { |
| 378 | cregs->tpc = pc; |
| 379 | cregs->tnpc = npc; |
| 380 | } |
| 381 | cregs->y = y; |
| 382 | for (i = 1; i < 16; i++) { |
| 383 | if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { |
| 384 | pt_error_return(regs, EFAULT); |
| 385 | goto out_tsk; |
| 386 | } |
| 387 | } |
| 388 | pt_succ_return(regs, 0); |
| 389 | goto out_tsk; |
| 390 | } |
| 391 | |
| 392 | case PTRACE_SETREGS64: { |
| 393 | struct pt_regs __user *pregs = (struct pt_regs __user *) addr; |
Al Viro | 26ecbde | 2006-01-12 01:05:43 -0800 | [diff] [blame] | 394 | struct pt_regs *cregs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | unsigned long tstate, tpc, tnpc, y; |
| 396 | int i; |
| 397 | |
| 398 | /* Must be careful, tracing process can only set certain |
| 399 | * bits in the psr. |
| 400 | */ |
| 401 | if (__get_user(tstate, (&pregs->tstate)) || |
| 402 | __get_user(tpc, (&pregs->tpc)) || |
| 403 | __get_user(tnpc, (&pregs->tnpc)) || |
| 404 | __get_user(y, (&pregs->y))) { |
| 405 | pt_error_return(regs, EFAULT); |
| 406 | goto out_tsk; |
| 407 | } |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 408 | if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | tpc &= 0xffffffff; |
| 410 | tnpc &= 0xffffffff; |
| 411 | } |
| 412 | tstate &= (TSTATE_ICC | TSTATE_XCC); |
| 413 | cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC); |
| 414 | cregs->tstate |= tstate; |
| 415 | if (!((tpc | tnpc) & 3)) { |
| 416 | cregs->tpc = tpc; |
| 417 | cregs->tnpc = tnpc; |
| 418 | } |
| 419 | cregs->y = y; |
| 420 | for (i = 1; i < 16; i++) { |
| 421 | if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { |
| 422 | pt_error_return(regs, EFAULT); |
| 423 | goto out_tsk; |
| 424 | } |
| 425 | } |
| 426 | pt_succ_return(regs, 0); |
| 427 | goto out_tsk; |
| 428 | } |
| 429 | |
| 430 | case PTRACE_GETFPREGS: { |
| 431 | struct fps { |
| 432 | unsigned int regs[32]; |
| 433 | unsigned int fsr; |
| 434 | unsigned int flags; |
| 435 | unsigned int extra; |
| 436 | unsigned int fpqd; |
| 437 | struct fq { |
| 438 | unsigned int insnaddr; |
| 439 | unsigned int insn; |
| 440 | } fpq[16]; |
| 441 | }; |
| 442 | struct fps __user *fps = (struct fps __user *) addr; |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 443 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | if (copy_to_user(&fps->regs[0], fpregs, |
| 446 | (32 * sizeof(unsigned int))) || |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 447 | __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | __put_user(0, (&fps->fpqd)) || |
| 449 | __put_user(0, (&fps->flags)) || |
| 450 | __put_user(0, (&fps->extra)) || |
| 451 | clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) { |
| 452 | pt_error_return(regs, EFAULT); |
| 453 | goto out_tsk; |
| 454 | } |
| 455 | pt_succ_return(regs, 0); |
| 456 | goto out_tsk; |
| 457 | } |
| 458 | |
| 459 | case PTRACE_GETFPREGS64: { |
| 460 | struct fps { |
| 461 | unsigned int regs[64]; |
| 462 | unsigned long fsr; |
| 463 | }; |
| 464 | struct fps __user *fps = (struct fps __user *) addr; |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 465 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | if (copy_to_user(&fps->regs[0], fpregs, |
| 468 | (64 * sizeof(unsigned int))) || |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 469 | __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | pt_error_return(regs, EFAULT); |
| 471 | goto out_tsk; |
| 472 | } |
| 473 | pt_succ_return(regs, 0); |
| 474 | goto out_tsk; |
| 475 | } |
| 476 | |
| 477 | case PTRACE_SETFPREGS: { |
| 478 | struct fps { |
| 479 | unsigned int regs[32]; |
| 480 | unsigned int fsr; |
| 481 | unsigned int flags; |
| 482 | unsigned int extra; |
| 483 | unsigned int fpqd; |
| 484 | struct fq { |
| 485 | unsigned int insnaddr; |
| 486 | unsigned int insn; |
| 487 | } fpq[16]; |
| 488 | }; |
| 489 | struct fps __user *fps = (struct fps __user *) addr; |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 490 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | unsigned fsr; |
| 492 | |
| 493 | if (copy_from_user(fpregs, &fps->regs[0], |
| 494 | (32 * sizeof(unsigned int))) || |
| 495 | __get_user(fsr, (&fps->fsr))) { |
| 496 | pt_error_return(regs, EFAULT); |
| 497 | goto out_tsk; |
| 498 | } |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 499 | task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL; |
| 500 | task_thread_info(child)->xfsr[0] |= fsr; |
| 501 | if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) |
| 502 | task_thread_info(child)->gsr[0] = 0; |
| 503 | task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | pt_succ_return(regs, 0); |
| 505 | goto out_tsk; |
| 506 | } |
| 507 | |
| 508 | case PTRACE_SETFPREGS64: { |
| 509 | struct fps { |
| 510 | unsigned int regs[64]; |
| 511 | unsigned long fsr; |
| 512 | }; |
| 513 | struct fps __user *fps = (struct fps __user *) addr; |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 514 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | if (copy_from_user(fpregs, &fps->regs[0], |
| 517 | (64 * sizeof(unsigned int))) || |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 518 | __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | pt_error_return(regs, EFAULT); |
| 520 | goto out_tsk; |
| 521 | } |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 522 | if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) |
| 523 | task_thread_info(child)->gsr[0] = 0; |
| 524 | task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | pt_succ_return(regs, 0); |
| 526 | goto out_tsk; |
| 527 | } |
| 528 | |
| 529 | case PTRACE_READTEXT: |
| 530 | case PTRACE_READDATA: { |
| 531 | int res = ptrace_readdata(child, addr, |
| 532 | (char __user *)addr2, data); |
| 533 | if (res == data) { |
| 534 | pt_succ_return(regs, 0); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 535 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | } |
| 537 | if (res >= 0) |
| 538 | res = -EIO; |
| 539 | pt_error_return(regs, -res); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 540 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | case PTRACE_WRITETEXT: |
| 544 | case PTRACE_WRITEDATA: { |
| 545 | int res = ptrace_writedata(child, (char __user *) addr2, |
| 546 | addr, data); |
| 547 | if (res == data) { |
| 548 | pt_succ_return(regs, 0); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 549 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } |
| 551 | if (res >= 0) |
| 552 | res = -EIO; |
| 553 | pt_error_return(regs, -res); |
David S. Miller | dadeafd | 2005-04-17 18:03:11 -0700 | [diff] [blame] | 554 | goto out_tsk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */ |
| 557 | addr = 1; |
| 558 | |
| 559 | case PTRACE_CONT: { /* restart after signal. */ |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 560 | if (!valid_signal(data)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | pt_error_return(regs, EIO); |
| 562 | goto out_tsk; |
| 563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | if (request == PTRACE_SYSCALL) { |
| 566 | set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| 567 | } else { |
| 568 | clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); |
| 569 | } |
| 570 | |
| 571 | child->exit_code = data; |
| 572 | #ifdef DEBUG_PTRACE |
| 573 | printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm, |
| 574 | child->pid, child->exit_code, |
Al Viro | 26ecbde | 2006-01-12 01:05:43 -0800 | [diff] [blame] | 575 | task_pt_regs(child)->tpc, |
| 576 | task_pt_regs(child)->tnpc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
| 578 | #endif |
| 579 | wake_up_process(child); |
| 580 | pt_succ_return(regs, 0); |
| 581 | goto out_tsk; |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * make the child exit. Best I can do is send it a sigkill. |
| 586 | * perhaps it should be put in the status that it wants to |
| 587 | * exit. |
| 588 | */ |
| 589 | case PTRACE_KILL: { |
| 590 | if (child->exit_state == EXIT_ZOMBIE) { /* already dead */ |
| 591 | pt_succ_return(regs, 0); |
| 592 | goto out_tsk; |
| 593 | } |
| 594 | child->exit_code = SIGKILL; |
| 595 | wake_up_process(child); |
| 596 | pt_succ_return(regs, 0); |
| 597 | goto out_tsk; |
| 598 | } |
| 599 | |
| 600 | case PTRACE_SUNDETACH: { /* detach a process that was attached. */ |
| 601 | int error = ptrace_detach(child, data); |
| 602 | if (error) { |
| 603 | pt_error_return(regs, EIO); |
| 604 | goto out_tsk; |
| 605 | } |
| 606 | pt_succ_return(regs, 0); |
| 607 | goto out_tsk; |
| 608 | } |
| 609 | |
| 610 | /* PTRACE_DUMPCORE unsupported... */ |
| 611 | |
David S. Miller | 731bbe4 | 2006-04-04 16:54:40 -0700 | [diff] [blame] | 612 | case PTRACE_GETEVENTMSG: { |
| 613 | int err; |
| 614 | |
| 615 | if (test_thread_flag(TIF_32BIT)) |
| 616 | err = put_user(child->ptrace_message, |
| 617 | (unsigned int __user *) data); |
| 618 | else |
| 619 | err = put_user(child->ptrace_message, |
| 620 | (unsigned long __user *) data); |
| 621 | if (err) |
| 622 | pt_error_return(regs, -err); |
| 623 | else |
| 624 | pt_succ_return(regs, 0); |
| 625 | break; |
| 626 | } |
| 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | default: { |
| 629 | int err = ptrace_request(child, request, addr, data); |
| 630 | if (err) |
| 631 | pt_error_return(regs, -err); |
| 632 | else |
| 633 | pt_succ_return(regs, 0); |
| 634 | goto out_tsk; |
| 635 | } |
| 636 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | out_tsk: |
| 638 | if (child) |
| 639 | put_task_struct(child); |
| 640 | out: |
| 641 | unlock_kernel(); |
| 642 | } |
| 643 | |
David S. Miller | 8d8a647 | 2005-07-10 16:55:48 -0700 | [diff] [blame] | 644 | asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | { |
David S. Miller | bb49bcd | 2005-07-10 16:49:28 -0700 | [diff] [blame] | 646 | /* do the secure computing check first */ |
David S. Miller | 8d8a647 | 2005-07-10 16:55:48 -0700 | [diff] [blame] | 647 | secure_computing(regs->u_regs[UREG_G1]); |
David S. Miller | bb49bcd | 2005-07-10 16:49:28 -0700 | [diff] [blame] | 648 | |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 649 | if (unlikely(current->audit_context) && syscall_exit_p) { |
| 650 | unsigned long tstate = regs->tstate; |
| 651 | int result = AUDITSC_SUCCESS; |
| 652 | |
| 653 | if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) |
| 654 | result = AUDITSC_FAILURE; |
| 655 | |
Al Viro | 5411be5 | 2006-03-29 20:23:36 -0500 | [diff] [blame^] | 656 | audit_syscall_exit(result, regs->u_regs[UREG_I0]); |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 657 | } |
| 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | if (!(current->ptrace & PT_PTRACED)) |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 660 | goto out; |
| 661 | |
| 662 | if (!test_thread_flag(TIF_SYSCALL_TRACE)) |
| 663 | goto out; |
| 664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) |
| 666 | ? 0x80 : 0)); |
| 667 | |
| 668 | /* |
| 669 | * this isn't the same as continuing with a signal, but it will do |
| 670 | * for normal use. strace only continues with a signal if the |
| 671 | * stopping signal is not SIGTRAP. -brl |
| 672 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | if (current->exit_code) { |
David S. Miller | bb49bcd | 2005-07-10 16:49:28 -0700 | [diff] [blame] | 674 | send_sig(current->exit_code, current, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | current->exit_code = 0; |
| 676 | } |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 677 | |
| 678 | out: |
| 679 | if (unlikely(current->audit_context) && !syscall_exit_p) |
Al Viro | 5411be5 | 2006-03-29 20:23:36 -0500 | [diff] [blame^] | 680 | audit_syscall_entry((test_thread_flag(TIF_32BIT) ? |
David S. Miller | f7ceba3 | 2005-07-10 19:29:45 -0700 | [diff] [blame] | 681 | AUDIT_ARCH_SPARC : |
| 682 | AUDIT_ARCH_SPARC64), |
| 683 | regs->u_regs[UREG_G1], |
| 684 | regs->u_regs[UREG_I0], |
| 685 | regs->u_regs[UREG_I1], |
| 686 | regs->u_regs[UREG_I2], |
| 687 | regs->u_regs[UREG_I3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |