1 // SPDX-License-Identifier: GPL-2.0-or-later
8 #include "ptrace-decl.h"
73  * regs_query_register_offset() - query register offset from its name
77  * pt_regs from its name. If the name is invalid, this returns -EINVAL;
82 	for (roff = regoffset_table; roff->name != NULL; roff++)  in regs_query_register_offset()
83 		if (!strcmp(roff->name, name))  in regs_query_register_offset()
84 			return roff->offset;  in regs_query_register_offset()
85 	return -EINVAL;  in regs_query_register_offset()
89  * regs_query_register_name() - query register name from its offset
98 	for (roff = regoffset_table; roff->name != NULL; roff++)  in regs_query_register_name()
99 		if (roff->offset == offset)  in regs_query_register_name()
100 			return roff->name;  in regs_query_register_name()
111 	return task->thread.regs->msr | task->thread.fpexc_mode;  in get_user_msr()
116 	unsigned long newmsr = (task->thread.regs->msr & ~MSR_DEBUGCHANGE) |  in set_user_msr()
118 	regs_set_return_msr(task->thread.regs, newmsr);  in set_user_msr()
123 static int get_user_dscr(struct task_struct *task, unsigned long *data)  in get_user_dscr()  argument
125 	*data = task->thread.dscr;  in get_user_dscr()
131 	task->thread.dscr = dscr;  in set_user_dscr()
132 	task->thread.dscr_inherit = 1;  in set_user_dscr()
136 static int get_user_dscr(struct task_struct *task, unsigned long *data)  in get_user_dscr()  argument
138 	return -EIO;  in get_user_dscr()
143 	return -EIO;  in set_user_dscr()
153 	set_trap(task->thread.regs, trap);  in set_user_trap()
160 int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)  in ptrace_get_reg()  argument
164 	if (task->thread.regs == NULL || !data)  in ptrace_get_reg()
165 		return -EIO;  in ptrace_get_reg()
168 		*data = get_user_msr(task);  in ptrace_get_reg()
173 		return get_user_dscr(task, data);  in ptrace_get_reg()
176 	 * softe copies paca->irq_soft_mask variable state. Since irq_soft_mask is  in ptrace_get_reg()
181 		*data = 1;  in ptrace_get_reg()
188 		*data = ((unsigned long *)task->thread.regs)[regno];  in ptrace_get_reg()
192 	return -EIO;  in ptrace_get_reg()
198 int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)  in ptrace_put_reg()  argument
200 	if (task->thread.regs == NULL)  in ptrace_put_reg()
201 		return -EIO;  in ptrace_put_reg()
204 		return set_user_msr(task, data);  in ptrace_put_reg()
206 		return set_user_trap(task, data);  in ptrace_put_reg()
208 		return set_user_dscr(task, data);  in ptrace_put_reg()
212 		((unsigned long *)task->thread.regs)[regno] = data;  in ptrace_put_reg()
215 	return -EIO;  in ptrace_put_reg()
225 	if (target->thread.regs == NULL)  in gpr_get()
226 		return -EIO;  in gpr_get()
228 	membuf_write(&to, target->thread.regs, sizeof(struct user_pt_regs));  in gpr_get()
234 	return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) -  in gpr_get()
245 	if (target->thread.regs == NULL)  in gpr_set()
246 		return -EIO;  in gpr_set()
249 				 target->thread.regs,  in gpr_set()
265 					 &target->thread.regs->orig_gpr3,  in gpr_set()
284 					  (PT_TRAP + 1) * sizeof(reg), -1);  in gpr_set()
293 	if (!target->thread.regs)  in ppr_get()
294 		return -EINVAL;  in ppr_get()
296 	return membuf_write(&to, &target->thread.regs->ppr, sizeof(u64));  in ppr_get()
303 	if (!target->thread.regs)  in ppr_set()
304 		return -EINVAL;  in ppr_set()
307 				  &target->thread.regs->ppr, 0, sizeof(u64));  in ppr_set()
313 	return membuf_write(&to, &target->thread.dscr, sizeof(u64));  in dscr_get()
320 				  &target->thread.dscr, 0, sizeof(u64));  in dscr_set()
327 	return membuf_write(&to, &target->thread.tar, sizeof(u64));  in tar_get()
334 				  &target->thread.tar, 0, sizeof(u64));  in tar_set()
340 		return -ENODEV;  in ebb_active()
342 	if (target->thread.used_ebb)  in ebb_active()
343 		return regset->n;  in ebb_active()
356 		return -ENODEV;  in ebb_get()
358 	if (!target->thread.used_ebb)  in ebb_get()
359 		return -ENODATA;  in ebb_get()
361 	return membuf_write(&to, &target->thread.ebbrr, 3 * sizeof(unsigned long));  in ebb_get()
375 		return -ENODEV;  in ebb_set()
377 	if (target->thread.used_ebb)  in ebb_set()
378 		return -ENODATA;  in ebb_set()
380 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.ebbrr,  in ebb_set()
385 					 &target->thread.ebbhr, sizeof(unsigned long),  in ebb_set()
390 					 &target->thread.bescr, 2 * sizeof(unsigned long),  in ebb_set()
398 		return -ENODEV;  in pmu_active()
400 	return regset->n;  in pmu_active()
413 		return -ENODEV;  in pmu_get()
415 	return membuf_write(&to, &target->thread.siar, 5 * sizeof(unsigned long));  in pmu_get()
431 		return -ENODEV;  in pmu_set()
433 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.siar,  in pmu_set()
438 					 &target->thread.sdar, sizeof(unsigned long),  in pmu_set()
443 					 &target->thread.sier, 2 * sizeof(unsigned long),  in pmu_set()
448 					 &target->thread.mmcr2, 3 * sizeof(unsigned long),  in pmu_set()
453 					 &target->thread.mmcr0, 4 * sizeof(unsigned long),  in pmu_set()
461 		return -ENODEV;  in dexcr_active()
463 	return regset->n;  in dexcr_active()
470 		return -ENODEV;  in dexcr_get()
472 	membuf_store(&to, (u64)lower_32_bits(target->thread.dexcr));  in dexcr_get()
475 	 * Technically the HDEXCR is per-cpu, but a hypervisor can't reasonably  in dexcr_get()
485 		return -ENODEV;  in hashkeyr_active()
487 	return regset->n;  in hashkeyr_active()
494 		return -ENODEV;  in hashkeyr_get()
496 	return membuf_store(&to, target->thread.hashkeyr);  in hashkeyr_get()
504 		return -ENODEV;  in hashkeyr_set()
506 	return user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.hashkeyr,  in hashkeyr_set()
516 		return -ENODEV;  in pkey_active()
518 	return regset->n;  in pkey_active()
526 		return -ENODEV;  in pkey_get()
528 	membuf_store(&to, target->thread.regs->amr);  in pkey_get()
529 	membuf_store(&to, target->thread.regs->iamr);  in pkey_get()
541 		return -ENODEV;  in pkey_set()
545 		return -EINVAL;  in pkey_set()
562 	target->thread.regs->amr = (new_amr & default_uamor) |  in pkey_set()
563 		(target->thread.regs->amr & ~default_uamor);  in pkey_set()
584 		.active = vr_active, .regset_get = vr_get, .set = vr_set
591 		.active = vsr_active, .regset_get = vsr_get, .set = vsr_set
598 		.active = evr_active, .regset_get = evr_get, .set = evr_set
605 		.active = tm_cgpr_active, .regset_get = tm_cgpr_get, .set = tm_cgpr_set
610 		.active = tm_cfpr_active, .regset_get = tm_cfpr_get, .set = tm_cfpr_set
615 		.active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set
620 		.active = tm_cvsx_active, .regset_get = tm_cvsx_get, .set = tm_cvsx_set
625 		.active = tm_spr_active, .regset_get = tm_spr_get, .set = tm_spr_set
630 		.active = tm_tar_active, .regset_get = tm_tar_get, .set = tm_tar_set
635 		.active = tm_ppr_active, .regset_get = tm_ppr_get, .set = tm_ppr_set
640 		.active = tm_dscr_active, .regset_get = tm_dscr_get, .set = tm_dscr_set
664 		.active = ebb_active, .regset_get = ebb_get, .set = ebb_set
669 		.active = pmu_active, .regset_get = pmu_get, .set = pmu_set
674 		.active = dexcr_active, .regset_get = dexcr_get
680 		.active = hashkeyr_active, .regset_get = hashkeyr_get, .set = hashkeyr_set
688 		.active = pkey_active, .regset_get = pkey_get, .set = pkey_set
711 	return membuf_zero(&to, (ELF_NGREG - PT_REGS_COUNT) * sizeof(u32));  in gpr32_get_common()
724 	for (; count > 0 && pos < PT_MSR; --count)  in gpr32_set_common_kernel()
730 		--count;  in gpr32_set_common_kernel()
733 	for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)  in gpr32_set_common_kernel()
735 	for (; count > 0 && pos < PT_TRAP; --count, ++pos)  in gpr32_set_common_kernel()
741 		--count;  in gpr32_set_common_kernel()
748 				  (PT_TRAP + 1) * sizeof(compat_ulong_t), -1);  in gpr32_set_common_kernel()
762 		return -EFAULT;  in gpr32_set_common_user()
767 	for (; count > 0 && pos < PT_MSR; --count) {  in gpr32_set_common_user()
776 		--count;  in gpr32_set_common_user()
779 	for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {  in gpr32_set_common_user()
783 	for (; count > 0 && pos < PT_TRAP; --count, ++pos)  in gpr32_set_common_user()
790 		--count;  in gpr32_set_common_user()
798 				  (PT_TRAP + 1) * sizeof(reg), -1);  in gpr32_set_common_user()
803 	return -EFAULT;  in gpr32_set_common_user()
822 	if (target->thread.regs == NULL)  in gpr32_get()
823 		return -EIO;  in gpr32_get()
826 			&target->thread.regs->gpr[0]);  in gpr32_get()
834 	if (target->thread.regs == NULL)  in gpr32_set()
835 		return -EIO;  in gpr32_set()
838 			&target->thread.regs->gpr[0]);  in gpr32_set()
859 		.active = vr_active, .regset_get = vr_get, .set = vr_set
866 		.active = evr_active, .regset_get = evr_get, .set = evr_set
873 		.active = tm_cgpr_active,
879 		.active = tm_cfpr_active, .regset_get = tm_cfpr_get, .set = tm_cfpr_set
884 		.active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set
889 		.active = tm_cvsx_active, .regset_get = tm_cvsx_get, .set = tm_cvsx_set
894 		.active = tm_spr_active, .regset_get = tm_spr_get, .set = tm_spr_set
899 		.active = tm_tar_active, .regset_get = tm_tar_get, .set = tm_tar_set
904 		.active = tm_ppr_active, .regset_get = tm_ppr_get, .set = tm_ppr_set
909 		.active = tm_dscr_active, .regset_get = tm_dscr_get, .set = tm_dscr_set
933 		.active = ebb_active, .regset_get = ebb_get, .set = ebb_set