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-rw-r--r--arch/m68k/kernel/ptrace_mm.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/arch/m68k/kernel/ptrace_mm.c b/arch/m68k/kernel/ptrace_mm.c
deleted file mode 100644
index 7bc999b73529..000000000000
--- a/arch/m68k/kernel/ptrace_mm.c
+++ /dev/null
@@ -1,295 +0,0 @@
1/*
2 * linux/arch/m68k/kernel/ptrace.c
3 *
4 * Copyright (C) 1994 by Hamish Macdonald
5 * Taken from linux/kernel/ptrace.c and modified for M680x0.
6 * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
7 *
8 * This file is subject to the terms and conditions of the GNU General
9 * Public License. See the file COPYING in the main directory of
10 * this archive for more details.
11 */
12
13#include <linux/kernel.h>
14#include <linux/sched.h>
15#include <linux/mm.h>
16#include <linux/smp.h>
17#include <linux/errno.h>
18#include <linux/ptrace.h>
19#include <linux/user.h>
20#include <linux/signal.h>
21#include <linux/tracehook.h>
22
23#include <asm/uaccess.h>
24#include <asm/page.h>
25#include <asm/pgtable.h>
26#include <asm/system.h>
27#include <asm/processor.h>
28
29/*
30 * does not yet catch signals sent when the child dies.
31 * in exit.c or in signal.c.
32 */
33
34/* determines which bits in the SR the user has access to. */
35/* 1 = access 0 = no access */
36#define SR_MASK 0x001f
37
38/* sets the trace bits. */
39#define TRACE_BITS 0xC000
40#define T1_BIT 0x8000
41#define T0_BIT 0x4000
42
43/* Find the stack offset for a register, relative to thread.esp0. */
44#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg)
45#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \
46 - sizeof(struct switch_stack))
47/* Mapping from PT_xxx to the stack offset at which the register is
48 saved. Notice that usp has no stack-slot and needs to be treated
49 specially (see get_reg/put_reg below). */
50static const int regoff[] = {
51 [0] = PT_REG(d1),
52 [1] = PT_REG(d2),
53 [2] = PT_REG(d3),
54 [3] = PT_REG(d4),
55 [4] = PT_REG(d5),
56 [5] = SW_REG(d6),
57 [6] = SW_REG(d7),
58 [7] = PT_REG(a0),
59 [8] = PT_REG(a1),
60 [9] = PT_REG(a2),
61 [10] = SW_REG(a3),
62 [11] = SW_REG(a4),
63 [12] = SW_REG(a5),
64 [13] = SW_REG(a6),
65 [14] = PT_REG(d0),
66 [15] = -1,
67 [16] = PT_REG(orig_d0),
68 [17] = PT_REG(sr),
69 [18] = PT_REG(pc),
70};
71
72/*
73 * Get contents of register REGNO in task TASK.
74 */
75static inline long get_reg(struct task_struct *task, int regno)
76{
77 unsigned long *addr;
78
79 if (regno == PT_USP)
80 addr = &task->thread.usp;
81 else if (regno < ARRAY_SIZE(regoff))
82 addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
83 else
84 return 0;
85 /* Need to take stkadj into account. */
86 if (regno == PT_SR || regno == PT_PC) {
87 long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
88 addr = (unsigned long *) ((unsigned long)addr + stkadj);
89 /* The sr is actually a 16 bit register. */
90 if (regno == PT_SR)
91 return *(unsigned short *)addr;
92 }
93 return *addr;
94}
95
96/*
97 * Write contents of register REGNO in task TASK.
98 */
99static inline int put_reg(struct task_struct *task, int regno,
100 unsigned long data)
101{
102 unsigned long *addr;
103
104 if (regno == PT_USP)
105 addr = &task->thread.usp;
106 else if (regno < ARRAY_SIZE(regoff))
107 addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
108 else
109 return -1;
110 /* Need to take stkadj into account. */
111 if (regno == PT_SR || regno == PT_PC) {
112 long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
113 addr = (unsigned long *) ((unsigned long)addr + stkadj);
114 /* The sr is actually a 16 bit register. */
115 if (regno == PT_SR) {
116 *(unsigned short *)addr = data;
117 return 0;
118 }
119 }
120 *addr = data;
121 return 0;
122}
123
124/*
125 * Make sure the single step bit is not set.
126 */
127static inline void singlestep_disable(struct task_struct *child)
128{
129 unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
130 put_reg(child, PT_SR, tmp);
131 clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
132}
133
134/*
135 * Called by kernel/ptrace.c when detaching..
136 */
137void ptrace_disable(struct task_struct *child)
138{
139 singlestep_disable(child);
140}
141
142void user_enable_single_step(struct task_struct *child)
143{
144 unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
145 put_reg(child, PT_SR, tmp | T1_BIT);
146 set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
147}
148
149void user_enable_block_step(struct task_struct *child)
150{
151 unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
152 put_reg(child, PT_SR, tmp | T0_BIT);
153}
154
155void user_disable_single_step(struct task_struct *child)
156{
157 singlestep_disable(child);
158}
159
160long arch_ptrace(struct task_struct *child, long request,
161 unsigned long addr, unsigned long data)
162{
163 unsigned long tmp;
164 int i, ret = 0;
165 int regno = addr >> 2; /* temporary hack. */
166 unsigned long __user *datap = (unsigned long __user *) data;
167
168 switch (request) {
169 /* read the word at location addr in the USER area. */
170 case PTRACE_PEEKUSR:
171 if (addr & 3)
172 goto out_eio;
173
174 if (regno >= 0 && regno < 19) {
175 tmp = get_reg(child, regno);
176 } else if (regno >= 21 && regno < 49) {
177 tmp = child->thread.fp[regno - 21];
178 /* Convert internal fpu reg representation
179 * into long double format
180 */
181 if (FPU_IS_EMU && (regno < 45) && !(regno % 3))
182 tmp = ((tmp & 0xffff0000) << 15) |
183 ((tmp & 0x0000ffff) << 16);
184 } else
185 goto out_eio;
186 ret = put_user(tmp, datap);
187 break;
188
189 case PTRACE_POKEUSR:
190 /* write the word at location addr in the USER area */
191 if (addr & 3)
192 goto out_eio;
193
194 if (regno == PT_SR) {
195 data &= SR_MASK;
196 data |= get_reg(child, PT_SR) & ~SR_MASK;
197 }
198 if (regno >= 0 && regno < 19) {
199 if (put_reg(child, regno, data))
200 goto out_eio;
201 } else if (regno >= 21 && regno < 48) {
202 /* Convert long double format
203 * into internal fpu reg representation
204 */
205 if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) {
206 data <<= 15;
207 data = (data & 0xffff0000) |
208 ((data & 0x0000ffff) >> 1);
209 }
210 child->thread.fp[regno - 21] = data;
211 } else
212 goto out_eio;
213 break;
214
215 case PTRACE_GETREGS: /* Get all gp regs from the child. */
216 for (i = 0; i < 19; i++) {
217 tmp = get_reg(child, i);
218 ret = put_user(tmp, datap);
219 if (ret)
220 break;
221 datap++;
222 }
223 break;
224
225 case PTRACE_SETREGS: /* Set all gp regs in the child. */
226 for (i = 0; i < 19; i++) {
227 ret = get_user(tmp, datap);
228 if (ret)
229 break;
230 if (i == PT_SR) {
231 tmp &= SR_MASK;
232 tmp |= get_reg(child, PT_SR) & ~SR_MASK;
233 }
234 put_reg(child, i, tmp);
235 datap++;
236 }
237 break;
238
239 case PTRACE_GETFPREGS: /* Get the child FPU state. */
240 if (copy_to_user(datap, &child->thread.fp,
241 sizeof(struct user_m68kfp_struct)))
242 ret = -EFAULT;
243 break;
244
245 case PTRACE_SETFPREGS: /* Set the child FPU state. */
246 if (copy_from_user(&child->thread.fp, datap,
247 sizeof(struct user_m68kfp_struct)))
248 ret = -EFAULT;
249 break;
250
251 case PTRACE_GET_THREAD_AREA:
252 ret = put_user(task_thread_info(child)->tp_value, datap);
253 break;
254
255 default:
256 ret = ptrace_request(child, request, addr, data);
257 break;
258 }
259
260 return ret;
261out_eio:
262 return -EIO;
263}
264
265asmlinkage void syscall_trace(void)
266{
267 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
268 ? 0x80 : 0));
269 /*
270 * this isn't the same as continuing with a signal, but it will do
271 * for normal use. strace only continues with a signal if the
272 * stopping signal is not SIGTRAP. -brl
273 */
274 if (current->exit_code) {
275 send_sig(current->exit_code, current, 1);
276 current->exit_code = 0;
277 }
278}
279
280#ifdef CONFIG_COLDFIRE
281asmlinkage int syscall_trace_enter(void)
282{
283 int ret = 0;
284
285 if (test_thread_flag(TIF_SYSCALL_TRACE))
286 ret = tracehook_report_syscall_entry(task_pt_regs(current));
287 return ret;
288}
289
290asmlinkage void syscall_trace_leave(void)
291{
292 if (test_thread_flag(TIF_SYSCALL_TRACE))
293 tracehook_report_syscall_exit(task_pt_regs(current), 0);
294}
295#endif /* CONFIG_COLDFIRE */
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