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-rw-r--r--arch/score/kernel/ptrace.c212
1 files changed, 97 insertions, 115 deletions
diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
index 1db876b11476..174c6422b096 100644
--- a/arch/score/kernel/ptrace.c
+++ b/arch/score/kernel/ptrace.c
@@ -23,11 +23,100 @@
23 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 23 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 */ 24 */
25 25
26#include <linux/elf.h>
26#include <linux/kernel.h> 27#include <linux/kernel.h>
28#include <linux/mm.h>
27#include <linux/ptrace.h> 29#include <linux/ptrace.h>
30#include <linux/regset.h>
28 31
29#include <asm/uaccess.h> 32#include <asm/uaccess.h>
30 33
34/*
35 * retrieve the contents of SCORE userspace general registers
36 */
37static int genregs_get(struct task_struct *target,
38 const struct user_regset *regset,
39 unsigned int pos, unsigned int count,
40 void *kbuf, void __user *ubuf)
41{
42 const struct pt_regs *regs = task_pt_regs(target);
43 int ret;
44
45 /* skip 9 * sizeof(unsigned long) not use for pt_regs */
46 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
47 0, offsetof(struct pt_regs, regs));
48
49 /* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
50 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
51 regs->regs,
52 offsetof(struct pt_regs, regs),
53 offsetof(struct pt_regs, cp0_condition));
54
55 if (!ret)
56 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
57 sizeof(struct pt_regs), -1);
58
59 return ret;
60}
61
62/*
63 * update the contents of the SCORE userspace general registers
64 */
65static int genregs_set(struct task_struct *target,
66 const struct user_regset *regset,
67 unsigned int pos, unsigned int count,
68 const void *kbuf, const void __user *ubuf)
69{
70 struct pt_regs *regs = task_pt_regs(target);
71 int ret;
72
73 /* skip 9 * sizeof(unsigned long) */
74 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
75 0, offsetof(struct pt_regs, regs));
76
77 /* r0 - r31, cel, ceh, sr0, sr1, sr2, epc, ema, psr, ecr, condition */
78 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
79 regs->regs,
80 offsetof(struct pt_regs, regs),
81 offsetof(struct pt_regs, cp0_condition));
82
83 if (!ret)
84 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
85 sizeof(struct pt_regs), -1);
86
87 return ret;
88}
89
90/*
91 * Define the register sets available on the score7 under Linux
92 */
93enum score7_regset {
94 REGSET_GENERAL,
95};
96
97static const struct user_regset score7_regsets[] = {
98 [REGSET_GENERAL] = {
99 .core_note_type = NT_PRSTATUS,
100 .n = ELF_NGREG,
101 .size = sizeof(long),
102 .align = sizeof(long),
103 .get = genregs_get,
104 .set = genregs_set,
105 },
106};
107
108static const struct user_regset_view user_score_native_view = {
109 .name = "score7",
110 .e_machine = EM_SCORE7,
111 .regsets = score7_regsets,
112 .n = ARRAY_SIZE(score7_regsets),
113};
114
115const struct user_regset_view *task_user_regset_view(struct task_struct *task)
116{
117 return &user_score_native_view;
118}
119
31static int is_16bitinsn(unsigned long insn) 120static int is_16bitinsn(unsigned long insn)
32{ 121{
33 if ((insn & INSN32_MASK) == INSN32_MASK) 122 if ((insn & INSN32_MASK) == INSN32_MASK)
@@ -80,34 +169,6 @@ write_tsk_long(struct task_struct *child,
80 return copied != sizeof(val) ? -EIO : 0; 169 return copied != sizeof(val) ? -EIO : 0;
81} 170}
82 171
83/*
84 * Get all user integer registers.
85 */
86static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
87{
88 struct pt_regs *regs = task_pt_regs(tsk);
89
90 return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
91}
92
93/*
94 * Set all user integer registers.
95 */
96static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
97{
98 struct pt_regs newregs;
99 int ret;
100
101 ret = -EFAULT;
102 if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
103 struct pt_regs *regs = task_pt_regs(tsk);
104 *regs = newregs;
105 ret = 0;
106 }
107
108 return ret;
109}
110
111void user_enable_single_step(struct task_struct *child) 172void user_enable_single_step(struct task_struct *child)
112{ 173{
113 /* far_epc is the target of branch */ 174 /* far_epc is the target of branch */
@@ -270,97 +331,18 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
270 unsigned long __user *datap = (void __user *)data; 331 unsigned long __user *datap = (void __user *)data;
271 332
272 switch (request) { 333 switch (request) {
273 /* Read the word at location addr in the USER area. */
274 case PTRACE_PEEKUSR: {
275 struct pt_regs *regs;
276 unsigned long tmp;
277
278 regs = task_pt_regs(child);
279
280 tmp = 0; /* Default return value. */
281 switch (addr) {
282 case 0 ... 31:
283 tmp = regs->regs[addr];
284 break;
285 case PC:
286 tmp = regs->cp0_epc;
287 break;
288 case ECR:
289 tmp = regs->cp0_ecr;
290 break;
291 case EMA:
292 tmp = regs->cp0_ema;
293 break;
294 case CEH:
295 tmp = regs->ceh;
296 break;
297 case CEL:
298 tmp = regs->cel;
299 break;
300 case CONDITION:
301 tmp = regs->cp0_condition;
302 break;
303 case PSR:
304 tmp = regs->cp0_psr;
305 break;
306 case COUNTER:
307 tmp = regs->sr0;
308 break;
309 case LDCR:
310 tmp = regs->sr1;
311 break;
312 case STCR:
313 tmp = regs->sr2;
314 break;
315 default:
316 tmp = 0;
317 return -EIO;
318 }
319
320 ret = put_user(tmp, (unsigned int __user *) datap);
321 return ret;
322 }
323
324 case PTRACE_POKEUSR: {
325 struct pt_regs *regs;
326 ret = 0;
327 regs = task_pt_regs(child);
328
329 switch (addr) {
330 case 0 ... 31:
331 regs->regs[addr] = data;
332 break;
333 case PC:
334 regs->cp0_epc = data;
335 break;
336 case CEH:
337 regs->ceh = data;
338 break;
339 case CEL:
340 regs->cel = data;
341 break;
342 case CONDITION:
343 regs->cp0_condition = data;
344 break;
345 case PSR:
346 case COUNTER:
347 case STCR:
348 case LDCR:
349 break; /* user can't write the reg */
350 default:
351 /* The rest are not allowed. */
352 ret = -EIO;
353 break;
354 }
355 break;
356 }
357
358 case PTRACE_GETREGS: 334 case PTRACE_GETREGS:
359 ret = ptrace_getregs(child, (void __user *)datap); 335 ret = copy_regset_to_user(child, &user_score_native_view,
336 REGSET_GENERAL,
337 0, sizeof(struct pt_regs),
338 (void __user *)datap);
360 break; 339 break;
361 340
362 case PTRACE_SETREGS: 341 case PTRACE_SETREGS:
363 ret = ptrace_setregs(child, (void __user *)datap); 342 ret = copy_regset_from_user(child, &user_score_native_view,
343 REGSET_GENERAL,
344 0, sizeof(struct pt_regs),
345 (const void __user *)datap);
364 break; 346 break;
365 347
366 default: 348 default:
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-01 11:47:11 -0400