1 // SPDX-License-Identifier: GPL-2.0
2 /* ptrace.c: Sparc process tracing support.
4 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
6 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
9 * Added Linux support -miguel (weird, eh?, the original code was meant
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
16 #include <linux/errno.h>
17 #include <linux/ptrace.h>
18 #include <linux/user.h>
19 #include <linux/smp.h>
20 #include <linux/security.h>
21 #include <linux/signal.h>
22 #include <linux/regset.h>
23 #include <linux/elf.h>
24 #include <linux/tracehook.h>
26 #include <asm/pgtable.h>
27 #include <linux/uaccess.h>
28 #include <asm/cacheflush.h>
32 /* #define ALLOW_INIT_TRACING */
35 * Called by kernel/ptrace.c when detaching..
37 * Make sure single step bits etc are not set.
39 void ptrace_disable(struct task_struct *child)
49 static int regwindow32_get(struct task_struct *target,
50 const struct pt_regs *regs,
53 unsigned long reg_window = regs->u_regs[UREG_I6];
54 int size = 16 * sizeof(u32);
56 if (target == current) {
57 if (copy_from_user(uregs, (void __user *)reg_window, size))
60 if (access_process_vm(target, reg_window, uregs, size,
67 static int regwindow32_set(struct task_struct *target,
68 const struct pt_regs *regs,
71 unsigned long reg_window = regs->u_regs[UREG_I6];
72 int size = 16 * sizeof(u32);
74 if (target == current) {
75 if (copy_to_user((void __user *)reg_window, uregs, size))
78 if (access_process_vm(target, reg_window, uregs, size,
79 FOLL_FORCE | FOLL_WRITE) != size)
85 static int genregs32_get(struct task_struct *target,
86 const struct user_regset *regset,
87 unsigned int pos, unsigned int count,
88 void *kbuf, void __user *ubuf)
90 const struct pt_regs *regs = target->thread.kregs;
94 if (target == current)
97 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
103 if (pos < 32 * sizeof(u32)) {
104 if (regwindow32_get(target, regs, uregs))
106 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
108 16 * sizeof(u32), 32 * sizeof(u32));
113 uregs[0] = regs->psr;
115 uregs[2] = regs->npc;
117 uregs[4] = 0; /* WIM */
118 uregs[5] = 0; /* TBR */
119 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
121 32 * sizeof(u32), 38 * sizeof(u32));
124 static int genregs32_set(struct task_struct *target,
125 const struct user_regset *regset,
126 unsigned int pos, unsigned int count,
127 const void *kbuf, const void __user *ubuf)
129 struct pt_regs *regs = target->thread.kregs;
134 if (target == current)
135 flush_user_windows();
137 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
139 0, 16 * sizeof(u32));
143 if (pos < 32 * sizeof(u32)) {
144 if (regwindow32_get(target, regs, uregs))
146 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
148 16 * sizeof(u32), 32 * sizeof(u32));
151 if (regwindow32_set(target, regs, uregs))
156 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
158 32 * sizeof(u32), 33 * sizeof(u32));
161 regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
162 (psr & (PSR_ICC | PSR_SYSCALL));
165 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
167 33 * sizeof(u32), 34 * sizeof(u32));
170 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
172 34 * sizeof(u32), 35 * sizeof(u32));
175 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
176 35 * sizeof(u32), 38 * sizeof(u32));
179 static int fpregs32_get(struct task_struct *target,
180 const struct user_regset *regset,
181 unsigned int pos, unsigned int count,
182 void *kbuf, void __user *ubuf)
184 const unsigned long *fpregs = target->thread.float_regs;
188 if (target == current)
189 save_and_clear_fpu();
192 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
194 0, 32 * sizeof(u32));
197 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
201 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
209 val = (1 << 8) | (8 << 16);
210 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
217 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
218 35 * sizeof(u32), -1);
223 static int fpregs32_set(struct task_struct *target,
224 const struct user_regset *regset,
225 unsigned int pos, unsigned int count,
226 const void *kbuf, const void __user *ubuf)
228 unsigned long *fpregs = target->thread.float_regs;
232 if (target == current)
233 save_and_clear_fpu();
235 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
237 0, 32 * sizeof(u32));
239 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
242 if (!ret && count > 0) {
243 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
250 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
251 34 * sizeof(u32), -1);
255 static const struct user_regset sparc32_regsets[] = {
261 * PSR, PC, nPC, Y, WIM, TBR
264 .core_note_type = NT_PRSTATUS,
266 .size = sizeof(u32), .align = sizeof(u32),
267 .get = genregs32_get, .set = genregs32_set
273 * FPU QUEUE COUNT (8-bit char)
274 * FPU QUEUE ENTRYSIZE (8-bit char)
275 * FPU ENABLED (8-bit char)
277 * FPU QUEUE (64 32-bit ints)
280 .core_note_type = NT_PRFPREG,
282 .size = sizeof(u32), .align = sizeof(u32),
283 .get = fpregs32_get, .set = fpregs32_set
287 static const struct user_regset_view user_sparc32_view = {
288 .name = "sparc", .e_machine = EM_SPARC,
289 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
292 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
294 return &user_sparc32_view;
298 unsigned long regs[32];
304 unsigned long *insnaddr;
309 long arch_ptrace(struct task_struct *child, long request,
310 unsigned long addr, unsigned long data)
312 unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
314 const struct user_regset_view *view;
315 struct pt_regs __user *pregs;
316 struct fps __user *fps;
319 view = task_user_regset_view(current);
320 addr2p = (void __user *) addr2;
321 pregs = (struct pt_regs __user *) addr;
322 fps = (struct fps __user *) addr;
325 case PTRACE_GETREGS: {
326 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
331 copy_regset_to_user(child, view, REGSET_GENERAL,
338 case PTRACE_SETREGS: {
339 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
344 copy_regset_from_user(child, view, REGSET_GENERAL,
351 case PTRACE_GETFPREGS: {
352 ret = copy_regset_to_user(child, view, REGSET_FP,
357 ret = copy_regset_to_user(child, view, REGSET_FP,
363 if (__put_user(0, &fps->fpqd) ||
364 __put_user(0, &fps->flags) ||
365 __put_user(0, &fps->extra) ||
366 clear_user(fps->fpq, sizeof(fps->fpq)))
372 case PTRACE_SETFPREGS: {
373 ret = copy_regset_from_user(child, view, REGSET_FP,
378 ret = copy_regset_from_user(child, view, REGSET_FP,
385 case PTRACE_READTEXT:
386 case PTRACE_READDATA:
387 ret = ptrace_readdata(child, addr, addr2p, data);
395 case PTRACE_WRITETEXT:
396 case PTRACE_WRITEDATA:
397 ret = ptrace_writedata(child, addr2p, addr, data);
406 if (request == PTRACE_SPARC_DETACH)
407 request = PTRACE_DETACH;
408 ret = ptrace_request(child, request, addr, data);
415 asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
419 if (test_thread_flag(TIF_SYSCALL_TRACE)) {
421 tracehook_report_syscall_exit(regs, 0);
423 ret = tracehook_report_syscall_entry(regs);