add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/nios2/kernel/ptrace.c
..
..
@@ -21,45 +21,24 @@
21
21
 
22
22
 static int genregs_get(struct task_struct *target,
23
23
 		       const struct user_regset *regset,
24
-		       unsigned int pos, unsigned int count,
25
-		       void *kbuf, void __user *ubuf)
24
+		       struct membuf to)
26
25
 {
27
26
 	const struct pt_regs *regs = task_pt_regs(target);
28
27
 	const struct switch_stack *sw = (struct switch_stack *)regs - 1;
29
-	int ret = 0;
30
28
 
31
-#define REG_O_ZERO_RANGE(START, END)		\
32
-	if (!ret)					\
33
-		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, \
34
-			START * 4, (END * 4) + 4);
35
-
36
-#define REG_O_ONE(PTR, LOC)	\
37
-	if (!ret)			\
38
-		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
39
-			LOC * 4, (LOC * 4) + 4);
40
-
41
-#define REG_O_RANGE(PTR, START, END)	\
42
-	if (!ret)				\
43
-		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, PTR, \
44
-			START * 4, (END * 4) + 4);
45
-
46
-	REG_O_ZERO_RANGE(PTR_R0, PTR_R0);
47
-	REG_O_RANGE(&regs->r1, PTR_R1, PTR_R7);
48
-	REG_O_RANGE(&regs->r8, PTR_R8, PTR_R15);
49
-	REG_O_RANGE(sw, PTR_R16, PTR_R23);
50
-	REG_O_ZERO_RANGE(PTR_R24, PTR_R25); /* et and bt */
51
-	REG_O_ONE(&regs->gp, PTR_GP);
52
-	REG_O_ONE(&regs->sp, PTR_SP);
53
-	REG_O_ONE(&regs->fp, PTR_FP);
54
-	REG_O_ONE(&regs->ea, PTR_EA);
55
-	REG_O_ZERO_RANGE(PTR_BA, PTR_BA);
56
-	REG_O_ONE(&regs->ra, PTR_RA);
57
-	REG_O_ONE(&regs->ea, PTR_PC); /* use ea for PC */
58
-	if (!ret)
59
-		ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
60
-					 PTR_STATUS * 4, -1);
61
-
62
-	return ret;
29
+	membuf_zero(&to, 4); // R0
30
+	membuf_write(&to, &regs->r1, 7 * 4); // R1..R7
31
+	membuf_write(&to, &regs->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);
63
42
 }
64
43
 
65
44
 /*
..
..
@@ -121,7 +100,7 @@
121
100
 		.n = NUM_PTRACE_REG,
122
101
 		.size = sizeof(unsigned long),
123
102
 		.align = sizeof(unsigned long),
124
-		.get = genregs_get,
103
+		.regset_get = genregs_get,
125
104
 		.set = genregs_set,
126
105
 	}
127
106
 };