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1/*
2 * Copyright (C) 2014 Altera Corporation
3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
4 *
5 * This file is subject to the terms and conditions of the GNU General
6 * Public License. See the file COPYING in the main directory of this
7 * archive for more details.
8 */
9
10#include <linux/elf.h>
11#include <linux/errno.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/ptrace.h>
15#include <linux/regset.h>
16#include <linux/sched.h>
17#include <linux/tracehook.h>
18#include <linux/uaccess.h>
19#include <linux/user.h>
20
21static int genregs_get(struct task_struct *target,
22 const struct user_regset *regset,
23 unsigned int pos, unsigned int count,
24 void *kbuf, void __user *ubuf)
25{
26 const struct pt_regs *regs = task_pt_regs(target);
27 const struct switch_stack *sw = (struct switch_stack *)regs - 1;
28 int ret = 0;
29
30#define REG_O_ZERO_RANGE(START, END) \
31 if (!ret) \
32 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, \
33 START * 4, (END * 4) + 4);
34
35#define REG_O_ONE(PTR, LOC) \
36 if (!ret) \
37 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
38 LOC * 4, (LOC * 4) + 4);
39
40#define REG_O_RANGE(PTR, START, END) \
41 if (!ret) \
42 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
43 START * 4, (END * 4) + 4);
44
45 REG_O_ZERO_RANGE(PTR_R0, PTR_R0);
46 REG_O_RANGE(®s->r1, PTR_R1, PTR_R7);
47 REG_O_RANGE(®s->r8, PTR_R8, PTR_R15);
48 REG_O_RANGE(sw, PTR_R16, PTR_R23);
49 REG_O_ZERO_RANGE(PTR_R24, PTR_R25); /* et and bt */
50 REG_O_ONE(®s->gp, PTR_GP);
51 REG_O_ONE(®s->sp, PTR_SP);
52 REG_O_ONE(®s->fp, PTR_FP);
53 REG_O_ONE(®s->ea, PTR_EA);
54 REG_O_ZERO_RANGE(PTR_BA, PTR_BA);
55 REG_O_ONE(®s->ra, PTR_RA);
56 REG_O_ONE(®s->ea, PTR_PC); /* use ea for PC */
57 if (!ret)
58 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
59 PTR_STATUS * 4, -1);
60
61 return ret;
62}
63
64/*
65 * Set the thread state from a regset passed in via ptrace
66 */
67static int genregs_set(struct task_struct *target,
68 const struct user_regset *regset,
69 unsigned int pos, unsigned int count,
70 const void *kbuf, const void __user *ubuf)
71{
72 struct pt_regs *regs = task_pt_regs(target);
73 const struct switch_stack *sw = (struct switch_stack *)regs - 1;
74 int ret = 0;
75
76#define REG_IGNORE_RANGE(START, END) \
77 if (!ret) \
78 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
79 START * 4, (END * 4) + 4);
80
81#define REG_IN_ONE(PTR, LOC) \
82 if (!ret) \
83 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
84 (void *)(PTR), LOC * 4, (LOC * 4) + 4);
85
86#define REG_IN_RANGE(PTR, START, END) \
87 if (!ret) \
88 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
89 (void *)(PTR), START * 4, (END * 4) + 4);
90
91 REG_IGNORE_RANGE(PTR_R0, PTR_R0);
92 REG_IN_RANGE(®s->r1, PTR_R1, PTR_R7);
93 REG_IN_RANGE(®s->r8, PTR_R8, PTR_R15);
94 REG_IN_RANGE(sw, PTR_R16, PTR_R23);
95 REG_IGNORE_RANGE(PTR_R24, PTR_R25); /* et and bt */
96 REG_IN_ONE(®s->gp, PTR_GP);
97 REG_IN_ONE(®s->sp, PTR_SP);
98 REG_IN_ONE(®s->fp, PTR_FP);
99 REG_IN_ONE(®s->ea, PTR_EA);
100 REG_IGNORE_RANGE(PTR_BA, PTR_BA);
101 REG_IN_ONE(®s->ra, PTR_RA);
102 REG_IN_ONE(®s->ea, PTR_PC); /* use ea for PC */
103 if (!ret)
104 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
105 PTR_STATUS * 4, -1);
106
107 return ret;
108}
109
110/*
111 * Define the register sets available on Nios2 under Linux
112 */
113enum nios2_regset {
114 REGSET_GENERAL,
115};
116
117static const struct user_regset nios2_regsets[] = {
118 [REGSET_GENERAL] = {
119 .core_note_type = NT_PRSTATUS,
120 .n = NUM_PTRACE_REG,
121 .size = sizeof(unsigned long),
122 .align = sizeof(unsigned long),
123 .get = genregs_get,
124 .set = genregs_set,
125 }
126};
127
128static const struct user_regset_view nios2_user_view = {
129 .name = "nios2",
130 .e_machine = ELF_ARCH,
131 .ei_osabi = ELF_OSABI,
132 .regsets = nios2_regsets,
133 .n = ARRAY_SIZE(nios2_regsets)
134};
135
136const struct user_regset_view *task_user_regset_view(struct task_struct *task)
137{
138 return &nios2_user_view;
139}
140
141void ptrace_disable(struct task_struct *child)
142{
143
144}
145
146long arch_ptrace(struct task_struct *child, long request, unsigned long addr,
147 unsigned long data)
148{
149 return ptrace_request(child, request, addr, data);
150}
151
152asmlinkage int do_syscall_trace_enter(void)
153{
154 int ret = 0;
155
156 if (test_thread_flag(TIF_SYSCALL_TRACE))
157 ret = tracehook_report_syscall_entry(task_pt_regs(current));
158
159 return ret;
160}
161
162asmlinkage void do_syscall_trace_exit(void)
163{
164 if (test_thread_flag(TIF_SYSCALL_TRACE))
165 tracehook_report_syscall_exit(task_pt_regs(current), 0);
166}
1/*
2 * Copyright (C) 2014 Altera Corporation
3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
4 *
5 * This file is subject to the terms and conditions of the GNU General
6 * Public License. See the file COPYING in the main directory of this
7 * archive for more details.
8 */
9
10#include <linux/elf.h>
11#include <linux/errno.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/ptrace.h>
15#include <linux/regset.h>
16#include <linux/sched.h>
17#include <linux/sched/task_stack.h>
18#include <linux/tracehook.h>
19#include <linux/uaccess.h>
20#include <linux/user.h>
21
22static int genregs_get(struct task_struct *target,
23 const struct user_regset *regset,
24 struct membuf to)
25{
26 const struct pt_regs *regs = task_pt_regs(target);
27 const struct switch_stack *sw = (struct switch_stack *)regs - 1;
28
29 membuf_zero(&to, 4); // R0
30 membuf_write(&to, ®s->r1, 7 * 4); // R1..R7
31 membuf_write(&to, ®s->r8, 8 * 4); // R8..R15
32 membuf_write(&to, sw, 8 * 4); // R16..R23
33 membuf_zero(&to, 2 * 4); /* et and bt */
34 membuf_store(&to, regs->gp);
35 membuf_store(&to, regs->sp);
36 membuf_store(&to, regs->fp);
37 membuf_store(&to, regs->ea);
38 membuf_zero(&to, 4); // PTR_BA
39 membuf_store(&to, regs->ra);
40 membuf_store(&to, regs->ea); /* use ea for PC */
41 return membuf_zero(&to, (NUM_PTRACE_REG - PTR_PC) * 4);
42}
43
44/*
45 * Set the thread state from a regset passed in via ptrace
46 */
47static int genregs_set(struct task_struct *target,
48 const struct user_regset *regset,
49 unsigned int pos, unsigned int count,
50 const void *kbuf, const void __user *ubuf)
51{
52 struct pt_regs *regs = task_pt_regs(target);
53 const struct switch_stack *sw = (struct switch_stack *)regs - 1;
54 int ret = 0;
55
56#define REG_IGNORE_RANGE(START, END) \
57 if (!ret) \
58 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
59 START * 4, (END * 4) + 4);
60
61#define REG_IN_ONE(PTR, LOC) \
62 if (!ret) \
63 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
64 (void *)(PTR), LOC * 4, (LOC * 4) + 4);
65
66#define REG_IN_RANGE(PTR, START, END) \
67 if (!ret) \
68 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, \
69 (void *)(PTR), START * 4, (END * 4) + 4);
70
71 REG_IGNORE_RANGE(PTR_R0, PTR_R0);
72 REG_IN_RANGE(®s->r1, PTR_R1, PTR_R7);
73 REG_IN_RANGE(®s->r8, PTR_R8, PTR_R15);
74 REG_IN_RANGE(sw, PTR_R16, PTR_R23);
75 REG_IGNORE_RANGE(PTR_R24, PTR_R25); /* et and bt */
76 REG_IN_ONE(®s->gp, PTR_GP);
77 REG_IN_ONE(®s->sp, PTR_SP);
78 REG_IN_ONE(®s->fp, PTR_FP);
79 REG_IN_ONE(®s->ea, PTR_EA);
80 REG_IGNORE_RANGE(PTR_BA, PTR_BA);
81 REG_IN_ONE(®s->ra, PTR_RA);
82 REG_IN_ONE(®s->ea, PTR_PC); /* use ea for PC */
83 if (!ret)
84 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
85 PTR_STATUS * 4, -1);
86
87 return ret;
88}
89
90/*
91 * Define the register sets available on Nios2 under Linux
92 */
93enum nios2_regset {
94 REGSET_GENERAL,
95};
96
97static const struct user_regset nios2_regsets[] = {
98 [REGSET_GENERAL] = {
99 .core_note_type = NT_PRSTATUS,
100 .n = NUM_PTRACE_REG,
101 .size = sizeof(unsigned long),
102 .align = sizeof(unsigned long),
103 .regset_get = genregs_get,
104 .set = genregs_set,
105 }
106};
107
108static const struct user_regset_view nios2_user_view = {
109 .name = "nios2",
110 .e_machine = ELF_ARCH,
111 .ei_osabi = ELF_OSABI,
112 .regsets = nios2_regsets,
113 .n = ARRAY_SIZE(nios2_regsets)
114};
115
116const struct user_regset_view *task_user_regset_view(struct task_struct *task)
117{
118 return &nios2_user_view;
119}
120
121void ptrace_disable(struct task_struct *child)
122{
123
124}
125
126long arch_ptrace(struct task_struct *child, long request, unsigned long addr,
127 unsigned long data)
128{
129 return ptrace_request(child, request, addr, data);
130}
131
132asmlinkage int do_syscall_trace_enter(void)
133{
134 int ret = 0;
135
136 if (test_thread_flag(TIF_SYSCALL_TRACE))
137 ret = tracehook_report_syscall_entry(task_pt_regs(current));
138
139 return ret;
140}
141
142asmlinkage void do_syscall_trace_exit(void)
143{
144 if (test_thread_flag(TIF_SYSCALL_TRACE))
145 tracehook_report_syscall_exit(task_pt_regs(current), 0);
146}