3 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
5 * Derived from "arch/m68k/kernel/ptrace.c"
6 * Copyright (C) 1994 by Hamish Macdonald
7 * Taken from linux/kernel/ptrace.c and modified for M680x0.
8 * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
10 * Modified by Cort Dougan (cort@hq.fsmlabs.com)
11 * and Paul Mackerras (paulus@samba.org).
13 * This file is subject to the terms and conditions of the GNU General
14 * Public License. See the file README.legal in the main directory of
15 * this archive for more details.
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
21 #include <linux/smp.h>
22 #include <linux/errno.h>
23 #include <linux/ptrace.h>
24 #include <linux/regset.h>
25 #include <linux/tracehook.h>
26 #include <linux/elf.h>
27 #include <linux/user.h>
28 #include <linux/security.h>
29 #include <linux/signal.h>
30 #include <linux/seccomp.h>
31 #include <linux/audit.h>
32 #include <trace/syscall.h>
33 #include <linux/hw_breakpoint.h>
34 #include <linux/perf_event.h>
35 #include <linux/context_tracking.h>
36 #include <linux/nospec.h>
38 #include <linux/uaccess.h>
39 #include <linux/pkeys.h>
41 #include <asm/pgtable.h>
42 #include <asm/switch_to.h>
44 #include <asm/asm-prototypes.h>
45 #include <asm/debug.h>
47 #define CREATE_TRACE_POINTS
48 #include <trace/events/syscalls.h>
51 * The parameter save area on the stack is used to store arguments being passed
52 * to callee function and is located at fixed offset from stack pointer.
55 #define PARAMETER_SAVE_AREA_OFFSET 24 /* bytes */
56 #else /* CONFIG_PPC32 */
57 #define PARAMETER_SAVE_AREA_OFFSET 48 /* bytes */
60 struct pt_regs_offset {
65 #define STR(s) #s /* convert to string */
66 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
67 #define GPR_OFFSET_NAME(num) \
68 {.name = STR(r##num), .offset = offsetof(struct pt_regs, gpr[num])}, \
69 {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
70 #define REG_OFFSET_END {.name = NULL, .offset = 0}
72 #define TVSO(f) (offsetof(struct thread_vr_state, f))
73 #define TFSO(f) (offsetof(struct thread_fp_state, f))
74 #define TSO(f) (offsetof(struct thread_struct, f))
76 static const struct pt_regs_offset regoffset_table[] = {
109 REG_OFFSET_NAME(nip),
110 REG_OFFSET_NAME(msr),
111 REG_OFFSET_NAME(ctr),
112 REG_OFFSET_NAME(link),
113 REG_OFFSET_NAME(xer),
114 REG_OFFSET_NAME(ccr),
116 REG_OFFSET_NAME(softe),
120 REG_OFFSET_NAME(trap),
121 REG_OFFSET_NAME(dar),
122 REG_OFFSET_NAME(dsisr),
126 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
127 static void flush_tmregs_to_thread(struct task_struct *tsk)
130 * If task is not current, it will have been flushed already to
131 * it's thread_struct during __switch_to().
133 * A reclaim flushes ALL the state or if not in TM save TM SPRs
134 * in the appropriate thread structures from live.
137 if ((!cpu_has_feature(CPU_FTR_TM)) || (tsk != current))
140 if (MSR_TM_SUSPENDED(mfmsr())) {
141 tm_reclaim_current(TM_CAUSE_SIGNAL);
144 tm_save_sprs(&(tsk->thread));
148 static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
152 * regs_query_register_offset() - query register offset from its name
153 * @name: the name of a register
155 * regs_query_register_offset() returns the offset of a register in struct
156 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
158 int regs_query_register_offset(const char *name)
160 const struct pt_regs_offset *roff;
161 for (roff = regoffset_table; roff->name != NULL; roff++)
162 if (!strcmp(roff->name, name))
168 * regs_query_register_name() - query register name from its offset
169 * @offset: the offset of a register in struct pt_regs.
171 * regs_query_register_name() returns the name of a register from its
172 * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
174 const char *regs_query_register_name(unsigned int offset)
176 const struct pt_regs_offset *roff;
177 for (roff = regoffset_table; roff->name != NULL; roff++)
178 if (roff->offset == offset)
184 * does not yet catch signals sent when the child dies.
185 * in exit.c or in signal.c.
189 * Set of msr bits that gdb can change on behalf of a process.
191 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
192 #define MSR_DEBUGCHANGE 0
194 #define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
198 * Max register writeable via put_reg
201 #define PT_MAX_PUT_REG PT_MQ
203 #define PT_MAX_PUT_REG PT_CCR
206 static unsigned long get_user_msr(struct task_struct *task)
208 return task->thread.regs->msr | task->thread.fpexc_mode;
211 static int set_user_msr(struct task_struct *task, unsigned long msr)
213 task->thread.regs->msr &= ~MSR_DEBUGCHANGE;
214 task->thread.regs->msr |= msr & MSR_DEBUGCHANGE;
218 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
219 static unsigned long get_user_ckpt_msr(struct task_struct *task)
221 return task->thread.ckpt_regs.msr | task->thread.fpexc_mode;
224 static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr)
226 task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE;
227 task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE;
231 static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap)
233 task->thread.ckpt_regs.trap = trap & 0xfff0;
239 static int get_user_dscr(struct task_struct *task, unsigned long *data)
241 *data = task->thread.dscr;
245 static int set_user_dscr(struct task_struct *task, unsigned long dscr)
247 task->thread.dscr = dscr;
248 task->thread.dscr_inherit = 1;
252 static int get_user_dscr(struct task_struct *task, unsigned long *data)
257 static int set_user_dscr(struct task_struct *task, unsigned long dscr)
264 * We prevent mucking around with the reserved area of trap
265 * which are used internally by the kernel.
267 static int set_user_trap(struct task_struct *task, unsigned long trap)
269 task->thread.regs->trap = trap & 0xfff0;
274 * Get contents of register REGNO in task TASK.
276 int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)
278 unsigned int regs_max;
280 if ((task->thread.regs == NULL) || !data)
283 if (regno == PT_MSR) {
284 *data = get_user_msr(task);
288 if (regno == PT_DSCR)
289 return get_user_dscr(task, data);
293 * softe copies paca->irq_soft_mask variable state. Since irq_soft_mask is
294 * no more used as a flag, lets force usr to alway see the softe value as 1
295 * which means interrupts are not soft disabled.
297 if (regno == PT_SOFTE) {
303 regs_max = sizeof(struct user_pt_regs) / sizeof(unsigned long);
304 if (regno < regs_max) {
305 regno = array_index_nospec(regno, regs_max);
306 *data = ((unsigned long *)task->thread.regs)[regno];
314 * Write contents of register REGNO in task TASK.
316 int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
318 if (task->thread.regs == NULL)
322 return set_user_msr(task, data);
323 if (regno == PT_TRAP)
324 return set_user_trap(task, data);
325 if (regno == PT_DSCR)
326 return set_user_dscr(task, data);
328 if (regno <= PT_MAX_PUT_REG) {
329 regno = array_index_nospec(regno, PT_MAX_PUT_REG + 1);
330 ((unsigned long *)task->thread.regs)[regno] = data;
336 static int gpr_get(struct task_struct *target, const struct user_regset *regset,
337 unsigned int pos, unsigned int count,
338 void *kbuf, void __user *ubuf)
342 if (target->thread.regs == NULL)
345 if (!FULL_REGS(target->thread.regs)) {
346 /* We have a partial register set. Fill 14-31 with bogus values */
347 for (i = 14; i < 32; i++)
348 target->thread.regs->gpr[i] = NV_REG_POISON;
351 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
353 0, offsetof(struct pt_regs, msr));
355 unsigned long msr = get_user_msr(target);
356 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
357 offsetof(struct pt_regs, msr),
358 offsetof(struct pt_regs, msr) +
362 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
363 offsetof(struct pt_regs, msr) + sizeof(long));
366 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
367 &target->thread.regs->orig_gpr3,
368 offsetof(struct pt_regs, orig_gpr3),
369 sizeof(struct user_pt_regs));
371 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
372 sizeof(struct user_pt_regs), -1);
377 static int gpr_set(struct task_struct *target, const struct user_regset *regset,
378 unsigned int pos, unsigned int count,
379 const void *kbuf, const void __user *ubuf)
384 if (target->thread.regs == NULL)
387 CHECK_FULL_REGS(target->thread.regs);
389 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
391 0, PT_MSR * sizeof(reg));
393 if (!ret && count > 0) {
394 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
395 PT_MSR * sizeof(reg),
396 (PT_MSR + 1) * sizeof(reg));
398 ret = set_user_msr(target, reg);
401 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
402 offsetof(struct pt_regs, msr) + sizeof(long));
405 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
406 &target->thread.regs->orig_gpr3,
407 PT_ORIG_R3 * sizeof(reg),
408 (PT_MAX_PUT_REG + 1) * sizeof(reg));
410 if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
411 ret = user_regset_copyin_ignore(
412 &pos, &count, &kbuf, &ubuf,
413 (PT_MAX_PUT_REG + 1) * sizeof(reg),
414 PT_TRAP * sizeof(reg));
416 if (!ret && count > 0) {
417 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
418 PT_TRAP * sizeof(reg),
419 (PT_TRAP + 1) * sizeof(reg));
421 ret = set_user_trap(target, reg);
425 ret = user_regset_copyin_ignore(
426 &pos, &count, &kbuf, &ubuf,
427 (PT_TRAP + 1) * sizeof(reg), -1);
433 * Regardless of transactions, 'fp_state' holds the current running
434 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
435 * value of all FPR registers for the current transaction.
437 * Userspace interface buffer layout:
444 static int fpr_get(struct task_struct *target, const struct user_regset *regset,
445 unsigned int pos, unsigned int count,
446 void *kbuf, void __user *ubuf)
452 flush_fp_to_thread(target);
454 /* copy to local buffer then write that out */
455 for (i = 0; i < 32 ; i++)
456 buf[i] = target->thread.TS_FPR(i);
457 buf[32] = target->thread.fp_state.fpscr;
458 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
460 BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
461 offsetof(struct thread_fp_state, fpr[32]));
463 flush_fp_to_thread(target);
465 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
466 &target->thread.fp_state, 0, -1);
471 * Regardless of transactions, 'fp_state' holds the current running
472 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
473 * value of all FPR registers for the current transaction.
475 * Userspace interface buffer layout:
483 static int fpr_set(struct task_struct *target, const struct user_regset *regset,
484 unsigned int pos, unsigned int count,
485 const void *kbuf, const void __user *ubuf)
491 flush_fp_to_thread(target);
493 for (i = 0; i < 32 ; i++)
494 buf[i] = target->thread.TS_FPR(i);
495 buf[32] = target->thread.fp_state.fpscr;
497 /* copy to local buffer then write that out */
498 i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
502 for (i = 0; i < 32 ; i++)
503 target->thread.TS_FPR(i) = buf[i];
504 target->thread.fp_state.fpscr = buf[32];
507 BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
508 offsetof(struct thread_fp_state, fpr[32]));
510 flush_fp_to_thread(target);
512 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
513 &target->thread.fp_state, 0, -1);
517 #ifdef CONFIG_ALTIVEC
519 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
520 * The transfer totals 34 quadword. Quadwords 0-31 contain the
521 * corresponding vector registers. Quadword 32 contains the vscr as the
522 * last word (offset 12) within that quadword. Quadword 33 contains the
523 * vrsave as the first word (offset 0) within the quadword.
525 * This definition of the VMX state is compatible with the current PPC32
526 * ptrace interface. This allows signal handling and ptrace to use the
527 * same structures. This also simplifies the implementation of a bi-arch
528 * (combined (32- and 64-bit) gdb.
531 static int vr_active(struct task_struct *target,
532 const struct user_regset *regset)
534 flush_altivec_to_thread(target);
535 return target->thread.used_vr ? regset->n : 0;
539 * Regardless of transactions, 'vr_state' holds the current running
540 * value of all the VMX registers and 'ckvr_state' holds the last
541 * checkpointed value of all the VMX registers for the current
542 * transaction to fall back on in case it aborts.
544 * Userspace interface buffer layout:
552 static int vr_get(struct task_struct *target, const struct user_regset *regset,
553 unsigned int pos, unsigned int count,
554 void *kbuf, void __user *ubuf)
558 flush_altivec_to_thread(target);
560 BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
561 offsetof(struct thread_vr_state, vr[32]));
563 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
564 &target->thread.vr_state, 0,
565 33 * sizeof(vector128));
568 * Copy out only the low-order word of vrsave.
575 memset(&vrsave, 0, sizeof(vrsave));
577 vrsave.word = target->thread.vrsave;
579 start = 33 * sizeof(vector128);
580 end = start + sizeof(vrsave);
581 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
589 * Regardless of transactions, 'vr_state' holds the current running
590 * value of all the VMX registers and 'ckvr_state' holds the last
591 * checkpointed value of all the VMX registers for the current
592 * transaction to fall back on in case it aborts.
594 * Userspace interface buffer layout:
602 static int vr_set(struct task_struct *target, const struct user_regset *regset,
603 unsigned int pos, unsigned int count,
604 const void *kbuf, const void __user *ubuf)
608 flush_altivec_to_thread(target);
610 BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
611 offsetof(struct thread_vr_state, vr[32]));
613 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
614 &target->thread.vr_state, 0,
615 33 * sizeof(vector128));
616 if (!ret && count > 0) {
618 * We use only the first word of vrsave.
625 memset(&vrsave, 0, sizeof(vrsave));
627 vrsave.word = target->thread.vrsave;
629 start = 33 * sizeof(vector128);
630 end = start + sizeof(vrsave);
631 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
634 target->thread.vrsave = vrsave.word;
639 #endif /* CONFIG_ALTIVEC */
643 * Currently to set and and get all the vsx state, you need to call
644 * the fp and VMX calls as well. This only get/sets the lower 32
645 * 128bit VSX registers.
648 static int vsr_active(struct task_struct *target,
649 const struct user_regset *regset)
651 flush_vsx_to_thread(target);
652 return target->thread.used_vsr ? regset->n : 0;
656 * Regardless of transactions, 'fp_state' holds the current running
657 * value of all FPR registers and 'ckfp_state' holds the last
658 * checkpointed value of all FPR registers for the current
661 * Userspace interface buffer layout:
667 static int vsr_get(struct task_struct *target, const struct user_regset *regset,
668 unsigned int pos, unsigned int count,
669 void *kbuf, void __user *ubuf)
674 flush_tmregs_to_thread(target);
675 flush_fp_to_thread(target);
676 flush_altivec_to_thread(target);
677 flush_vsx_to_thread(target);
679 for (i = 0; i < 32 ; i++)
680 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
682 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
683 buf, 0, 32 * sizeof(double));
689 * Regardless of transactions, 'fp_state' holds the current running
690 * value of all FPR registers and 'ckfp_state' holds the last
691 * checkpointed value of all FPR registers for the current
694 * Userspace interface buffer layout:
700 static int vsr_set(struct task_struct *target, const struct user_regset *regset,
701 unsigned int pos, unsigned int count,
702 const void *kbuf, const void __user *ubuf)
707 flush_tmregs_to_thread(target);
708 flush_fp_to_thread(target);
709 flush_altivec_to_thread(target);
710 flush_vsx_to_thread(target);
712 for (i = 0; i < 32 ; i++)
713 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
715 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
716 buf, 0, 32 * sizeof(double));
718 for (i = 0; i < 32 ; i++)
719 target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
723 #endif /* CONFIG_VSX */
728 * For get_evrregs/set_evrregs functions 'data' has the following layout:
737 static int evr_active(struct task_struct *target,
738 const struct user_regset *regset)
740 flush_spe_to_thread(target);
741 return target->thread.used_spe ? regset->n : 0;
744 static int evr_get(struct task_struct *target, const struct user_regset *regset,
745 unsigned int pos, unsigned int count,
746 void *kbuf, void __user *ubuf)
750 flush_spe_to_thread(target);
752 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
754 0, sizeof(target->thread.evr));
756 BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
757 offsetof(struct thread_struct, spefscr));
760 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
762 sizeof(target->thread.evr), -1);
767 static int evr_set(struct task_struct *target, const struct user_regset *regset,
768 unsigned int pos, unsigned int count,
769 const void *kbuf, const void __user *ubuf)
773 flush_spe_to_thread(target);
775 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
777 0, sizeof(target->thread.evr));
779 BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
780 offsetof(struct thread_struct, spefscr));
783 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
785 sizeof(target->thread.evr), -1);
789 #endif /* CONFIG_SPE */
791 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
793 * tm_cgpr_active - get active number of registers in CGPR
794 * @target: The target task.
795 * @regset: The user regset structure.
797 * This function checks for the active number of available
798 * regisers in transaction checkpointed GPR category.
800 static int tm_cgpr_active(struct task_struct *target,
801 const struct user_regset *regset)
803 if (!cpu_has_feature(CPU_FTR_TM))
806 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
813 * tm_cgpr_get - get CGPR registers
814 * @target: The target task.
815 * @regset: The user regset structure.
816 * @pos: The buffer position.
817 * @count: Number of bytes to copy.
818 * @kbuf: Kernel buffer to copy from.
819 * @ubuf: User buffer to copy into.
821 * This function gets transaction checkpointed GPR registers.
823 * When the transaction is active, 'ckpt_regs' holds all the checkpointed
824 * GPR register values for the current transaction to fall back on if it
825 * aborts in between. This function gets those checkpointed GPR registers.
826 * The userspace interface buffer layout is as follows.
829 * struct pt_regs ckpt_regs;
832 static int tm_cgpr_get(struct task_struct *target,
833 const struct user_regset *regset,
834 unsigned int pos, unsigned int count,
835 void *kbuf, void __user *ubuf)
839 if (!cpu_has_feature(CPU_FTR_TM))
842 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
845 flush_tmregs_to_thread(target);
846 flush_fp_to_thread(target);
847 flush_altivec_to_thread(target);
849 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
850 &target->thread.ckpt_regs,
851 0, offsetof(struct pt_regs, msr));
853 unsigned long msr = get_user_ckpt_msr(target);
855 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
856 offsetof(struct pt_regs, msr),
857 offsetof(struct pt_regs, msr) +
861 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
862 offsetof(struct pt_regs, msr) + sizeof(long));
865 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
866 &target->thread.ckpt_regs.orig_gpr3,
867 offsetof(struct pt_regs, orig_gpr3),
868 sizeof(struct user_pt_regs));
870 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
871 sizeof(struct user_pt_regs), -1);
877 * tm_cgpr_set - set the CGPR registers
878 * @target: The target task.
879 * @regset: The user regset structure.
880 * @pos: The buffer position.
881 * @count: Number of bytes to copy.
882 * @kbuf: Kernel buffer to copy into.
883 * @ubuf: User buffer to copy from.
885 * This function sets in transaction checkpointed GPR registers.
887 * When the transaction is active, 'ckpt_regs' holds the checkpointed
888 * GPR register values for the current transaction to fall back on if it
889 * aborts in between. This function sets those checkpointed GPR registers.
890 * The userspace interface buffer layout is as follows.
893 * struct pt_regs ckpt_regs;
896 static int tm_cgpr_set(struct task_struct *target,
897 const struct user_regset *regset,
898 unsigned int pos, unsigned int count,
899 const void *kbuf, const void __user *ubuf)
904 if (!cpu_has_feature(CPU_FTR_TM))
907 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
910 flush_tmregs_to_thread(target);
911 flush_fp_to_thread(target);
912 flush_altivec_to_thread(target);
914 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
915 &target->thread.ckpt_regs,
916 0, PT_MSR * sizeof(reg));
918 if (!ret && count > 0) {
919 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
920 PT_MSR * sizeof(reg),
921 (PT_MSR + 1) * sizeof(reg));
923 ret = set_user_ckpt_msr(target, reg);
926 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
927 offsetof(struct pt_regs, msr) + sizeof(long));
930 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
931 &target->thread.ckpt_regs.orig_gpr3,
932 PT_ORIG_R3 * sizeof(reg),
933 (PT_MAX_PUT_REG + 1) * sizeof(reg));
935 if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
936 ret = user_regset_copyin_ignore(
937 &pos, &count, &kbuf, &ubuf,
938 (PT_MAX_PUT_REG + 1) * sizeof(reg),
939 PT_TRAP * sizeof(reg));
941 if (!ret && count > 0) {
942 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
943 PT_TRAP * sizeof(reg),
944 (PT_TRAP + 1) * sizeof(reg));
946 ret = set_user_ckpt_trap(target, reg);
950 ret = user_regset_copyin_ignore(
951 &pos, &count, &kbuf, &ubuf,
952 (PT_TRAP + 1) * sizeof(reg), -1);
958 * tm_cfpr_active - get active number of registers in CFPR
959 * @target: The target task.
960 * @regset: The user regset structure.
962 * This function checks for the active number of available
963 * regisers in transaction checkpointed FPR category.
965 static int tm_cfpr_active(struct task_struct *target,
966 const struct user_regset *regset)
968 if (!cpu_has_feature(CPU_FTR_TM))
971 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
978 * tm_cfpr_get - get CFPR registers
979 * @target: The target task.
980 * @regset: The user regset structure.
981 * @pos: The buffer position.
982 * @count: Number of bytes to copy.
983 * @kbuf: Kernel buffer to copy from.
984 * @ubuf: User buffer to copy into.
986 * This function gets in transaction checkpointed FPR registers.
988 * When the transaction is active 'ckfp_state' holds the checkpointed
989 * values for the current transaction to fall back on if it aborts
990 * in between. This function gets those checkpointed FPR registers.
991 * The userspace interface buffer layout is as follows.
998 static int tm_cfpr_get(struct task_struct *target,
999 const struct user_regset *regset,
1000 unsigned int pos, unsigned int count,
1001 void *kbuf, void __user *ubuf)
1006 if (!cpu_has_feature(CPU_FTR_TM))
1009 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1012 flush_tmregs_to_thread(target);
1013 flush_fp_to_thread(target);
1014 flush_altivec_to_thread(target);
1016 /* copy to local buffer then write that out */
1017 for (i = 0; i < 32 ; i++)
1018 buf[i] = target->thread.TS_CKFPR(i);
1019 buf[32] = target->thread.ckfp_state.fpscr;
1020 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
1024 * tm_cfpr_set - set CFPR registers
1025 * @target: The target task.
1026 * @regset: The user regset structure.
1027 * @pos: The buffer position.
1028 * @count: Number of bytes to copy.
1029 * @kbuf: Kernel buffer to copy into.
1030 * @ubuf: User buffer to copy from.
1032 * This function sets in transaction checkpointed FPR registers.
1034 * When the transaction is active 'ckfp_state' holds the checkpointed
1035 * FPR register values for the current transaction to fall back on
1036 * if it aborts in between. This function sets these checkpointed
1037 * FPR registers. The userspace interface buffer layout is as follows.
1044 static int tm_cfpr_set(struct task_struct *target,
1045 const struct user_regset *regset,
1046 unsigned int pos, unsigned int count,
1047 const void *kbuf, const void __user *ubuf)
1052 if (!cpu_has_feature(CPU_FTR_TM))
1055 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1058 flush_tmregs_to_thread(target);
1059 flush_fp_to_thread(target);
1060 flush_altivec_to_thread(target);
1062 for (i = 0; i < 32; i++)
1063 buf[i] = target->thread.TS_CKFPR(i);
1064 buf[32] = target->thread.ckfp_state.fpscr;
1066 /* copy to local buffer then write that out */
1067 i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
1070 for (i = 0; i < 32 ; i++)
1071 target->thread.TS_CKFPR(i) = buf[i];
1072 target->thread.ckfp_state.fpscr = buf[32];
1077 * tm_cvmx_active - get active number of registers in CVMX
1078 * @target: The target task.
1079 * @regset: The user regset structure.
1081 * This function checks for the active number of available
1082 * regisers in checkpointed VMX category.
1084 static int tm_cvmx_active(struct task_struct *target,
1085 const struct user_regset *regset)
1087 if (!cpu_has_feature(CPU_FTR_TM))
1090 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1097 * tm_cvmx_get - get CMVX registers
1098 * @target: The target task.
1099 * @regset: The user regset structure.
1100 * @pos: The buffer position.
1101 * @count: Number of bytes to copy.
1102 * @kbuf: Kernel buffer to copy from.
1103 * @ubuf: User buffer to copy into.
1105 * This function gets in transaction checkpointed VMX registers.
1107 * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
1108 * the checkpointed values for the current transaction to fall
1109 * back on if it aborts in between. The userspace interface buffer
1110 * layout is as follows.
1118 static int tm_cvmx_get(struct task_struct *target,
1119 const struct user_regset *regset,
1120 unsigned int pos, unsigned int count,
1121 void *kbuf, void __user *ubuf)
1125 BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
1127 if (!cpu_has_feature(CPU_FTR_TM))
1130 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1133 /* Flush the state */
1134 flush_tmregs_to_thread(target);
1135 flush_fp_to_thread(target);
1136 flush_altivec_to_thread(target);
1138 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1139 &target->thread.ckvr_state, 0,
1140 33 * sizeof(vector128));
1143 * Copy out only the low-order word of vrsave.
1149 memset(&vrsave, 0, sizeof(vrsave));
1150 vrsave.word = target->thread.ckvrsave;
1151 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
1152 33 * sizeof(vector128), -1);
1159 * tm_cvmx_set - set CMVX registers
1160 * @target: The target task.
1161 * @regset: The user regset structure.
1162 * @pos: The buffer position.
1163 * @count: Number of bytes to copy.
1164 * @kbuf: Kernel buffer to copy into.
1165 * @ubuf: User buffer to copy from.
1167 * This function sets in transaction checkpointed VMX registers.
1169 * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
1170 * the checkpointed values for the current transaction to fall
1171 * back on if it aborts in between. The userspace interface buffer
1172 * layout is as follows.
1180 static int tm_cvmx_set(struct task_struct *target,
1181 const struct user_regset *regset,
1182 unsigned int pos, unsigned int count,
1183 const void *kbuf, const void __user *ubuf)
1187 BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
1189 if (!cpu_has_feature(CPU_FTR_TM))
1192 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1195 flush_tmregs_to_thread(target);
1196 flush_fp_to_thread(target);
1197 flush_altivec_to_thread(target);
1199 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1200 &target->thread.ckvr_state, 0,
1201 33 * sizeof(vector128));
1202 if (!ret && count > 0) {
1204 * We use only the low-order word of vrsave.
1210 memset(&vrsave, 0, sizeof(vrsave));
1211 vrsave.word = target->thread.ckvrsave;
1212 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
1213 33 * sizeof(vector128), -1);
1215 target->thread.ckvrsave = vrsave.word;
1222 * tm_cvsx_active - get active number of registers in CVSX
1223 * @target: The target task.
1224 * @regset: The user regset structure.
1226 * This function checks for the active number of available
1227 * regisers in transaction checkpointed VSX category.
1229 static int tm_cvsx_active(struct task_struct *target,
1230 const struct user_regset *regset)
1232 if (!cpu_has_feature(CPU_FTR_TM))
1235 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1238 flush_vsx_to_thread(target);
1239 return target->thread.used_vsr ? regset->n : 0;
1243 * tm_cvsx_get - get CVSX registers
1244 * @target: The target task.
1245 * @regset: The user regset structure.
1246 * @pos: The buffer position.
1247 * @count: Number of bytes to copy.
1248 * @kbuf: Kernel buffer to copy from.
1249 * @ubuf: User buffer to copy into.
1251 * This function gets in transaction checkpointed VSX registers.
1253 * When the transaction is active 'ckfp_state' holds the checkpointed
1254 * values for the current transaction to fall back on if it aborts
1255 * in between. This function gets those checkpointed VSX registers.
1256 * The userspace interface buffer layout is as follows.
1262 static int tm_cvsx_get(struct task_struct *target,
1263 const struct user_regset *regset,
1264 unsigned int pos, unsigned int count,
1265 void *kbuf, void __user *ubuf)
1270 if (!cpu_has_feature(CPU_FTR_TM))
1273 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1276 /* Flush the state */
1277 flush_tmregs_to_thread(target);
1278 flush_fp_to_thread(target);
1279 flush_altivec_to_thread(target);
1280 flush_vsx_to_thread(target);
1282 for (i = 0; i < 32 ; i++)
1283 buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
1284 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1285 buf, 0, 32 * sizeof(double));
1291 * tm_cvsx_set - set CFPR registers
1292 * @target: The target task.
1293 * @regset: The user regset structure.
1294 * @pos: The buffer position.
1295 * @count: Number of bytes to copy.
1296 * @kbuf: Kernel buffer to copy into.
1297 * @ubuf: User buffer to copy from.
1299 * This function sets in transaction checkpointed VSX registers.
1301 * When the transaction is active 'ckfp_state' holds the checkpointed
1302 * VSX register values for the current transaction to fall back on
1303 * if it aborts in between. This function sets these checkpointed
1304 * FPR registers. The userspace interface buffer layout is as follows.
1310 static int tm_cvsx_set(struct task_struct *target,
1311 const struct user_regset *regset,
1312 unsigned int pos, unsigned int count,
1313 const void *kbuf, const void __user *ubuf)
1318 if (!cpu_has_feature(CPU_FTR_TM))
1321 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1324 /* Flush the state */
1325 flush_tmregs_to_thread(target);
1326 flush_fp_to_thread(target);
1327 flush_altivec_to_thread(target);
1328 flush_vsx_to_thread(target);
1330 for (i = 0; i < 32 ; i++)
1331 buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
1333 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1334 buf, 0, 32 * sizeof(double));
1336 for (i = 0; i < 32 ; i++)
1337 target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
1343 * tm_spr_active - get active number of registers in TM SPR
1344 * @target: The target task.
1345 * @regset: The user regset structure.
1347 * This function checks the active number of available
1348 * regisers in the transactional memory SPR category.
1350 static int tm_spr_active(struct task_struct *target,
1351 const struct user_regset *regset)
1353 if (!cpu_has_feature(CPU_FTR_TM))
1360 * tm_spr_get - get the TM related SPR registers
1361 * @target: The target task.
1362 * @regset: The user regset structure.
1363 * @pos: The buffer position.
1364 * @count: Number of bytes to copy.
1365 * @kbuf: Kernel buffer to copy from.
1366 * @ubuf: User buffer to copy into.
1368 * This function gets transactional memory related SPR registers.
1369 * The userspace interface buffer layout is as follows.
1377 static int tm_spr_get(struct task_struct *target,
1378 const struct user_regset *regset,
1379 unsigned int pos, unsigned int count,
1380 void *kbuf, void __user *ubuf)
1385 BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
1386 BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
1387 BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
1389 if (!cpu_has_feature(CPU_FTR_TM))
1392 /* Flush the states */
1393 flush_tmregs_to_thread(target);
1394 flush_fp_to_thread(target);
1395 flush_altivec_to_thread(target);
1397 /* TFHAR register */
1398 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1399 &target->thread.tm_tfhar, 0, sizeof(u64));
1401 /* TEXASR register */
1403 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1404 &target->thread.tm_texasr, sizeof(u64),
1407 /* TFIAR register */
1409 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1410 &target->thread.tm_tfiar,
1411 2 * sizeof(u64), 3 * sizeof(u64));
1416 * tm_spr_set - set the TM related SPR registers
1417 * @target: The target task.
1418 * @regset: The user regset structure.
1419 * @pos: The buffer position.
1420 * @count: Number of bytes to copy.
1421 * @kbuf: Kernel buffer to copy into.
1422 * @ubuf: User buffer to copy from.
1424 * This function sets transactional memory related SPR registers.
1425 * The userspace interface buffer layout is as follows.
1433 static int tm_spr_set(struct task_struct *target,
1434 const struct user_regset *regset,
1435 unsigned int pos, unsigned int count,
1436 const void *kbuf, const void __user *ubuf)
1441 BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
1442 BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
1443 BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
1445 if (!cpu_has_feature(CPU_FTR_TM))
1448 /* Flush the states */
1449 flush_tmregs_to_thread(target);
1450 flush_fp_to_thread(target);
1451 flush_altivec_to_thread(target);
1453 /* TFHAR register */
1454 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1455 &target->thread.tm_tfhar, 0, sizeof(u64));
1457 /* TEXASR register */
1459 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1460 &target->thread.tm_texasr, sizeof(u64),
1463 /* TFIAR register */
1465 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1466 &target->thread.tm_tfiar,
1467 2 * sizeof(u64), 3 * sizeof(u64));
1471 static int tm_tar_active(struct task_struct *target,
1472 const struct user_regset *regset)
1474 if (!cpu_has_feature(CPU_FTR_TM))
1477 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1483 static int tm_tar_get(struct task_struct *target,
1484 const struct user_regset *regset,
1485 unsigned int pos, unsigned int count,
1486 void *kbuf, void __user *ubuf)
1490 if (!cpu_has_feature(CPU_FTR_TM))
1493 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1496 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1497 &target->thread.tm_tar, 0, sizeof(u64));
1501 static int tm_tar_set(struct task_struct *target,
1502 const struct user_regset *regset,
1503 unsigned int pos, unsigned int count,
1504 const void *kbuf, const void __user *ubuf)
1508 if (!cpu_has_feature(CPU_FTR_TM))
1511 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1514 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1515 &target->thread.tm_tar, 0, sizeof(u64));
1519 static int tm_ppr_active(struct task_struct *target,
1520 const struct user_regset *regset)
1522 if (!cpu_has_feature(CPU_FTR_TM))
1525 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1532 static int tm_ppr_get(struct task_struct *target,
1533 const struct user_regset *regset,
1534 unsigned int pos, unsigned int count,
1535 void *kbuf, void __user *ubuf)
1539 if (!cpu_has_feature(CPU_FTR_TM))
1542 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1545 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1546 &target->thread.tm_ppr, 0, sizeof(u64));
1550 static int tm_ppr_set(struct task_struct *target,
1551 const struct user_regset *regset,
1552 unsigned int pos, unsigned int count,
1553 const void *kbuf, const void __user *ubuf)
1557 if (!cpu_has_feature(CPU_FTR_TM))
1560 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1563 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1564 &target->thread.tm_ppr, 0, sizeof(u64));
1568 static int tm_dscr_active(struct task_struct *target,
1569 const struct user_regset *regset)
1571 if (!cpu_has_feature(CPU_FTR_TM))
1574 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1580 static int tm_dscr_get(struct task_struct *target,
1581 const struct user_regset *regset,
1582 unsigned int pos, unsigned int count,
1583 void *kbuf, void __user *ubuf)
1587 if (!cpu_has_feature(CPU_FTR_TM))
1590 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1593 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1594 &target->thread.tm_dscr, 0, sizeof(u64));
1598 static int tm_dscr_set(struct task_struct *target,
1599 const struct user_regset *regset,
1600 unsigned int pos, unsigned int count,
1601 const void *kbuf, const void __user *ubuf)
1605 if (!cpu_has_feature(CPU_FTR_TM))
1608 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1611 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1612 &target->thread.tm_dscr, 0, sizeof(u64));
1615 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
1618 static int ppr_get(struct task_struct *target,
1619 const struct user_regset *regset,
1620 unsigned int pos, unsigned int count,
1621 void *kbuf, void __user *ubuf)
1623 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1624 &target->thread.regs->ppr, 0, sizeof(u64));
1627 static int ppr_set(struct task_struct *target,
1628 const struct user_regset *regset,
1629 unsigned int pos, unsigned int count,
1630 const void *kbuf, const void __user *ubuf)
1632 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1633 &target->thread.regs->ppr, 0, sizeof(u64));
1636 static int dscr_get(struct task_struct *target,
1637 const struct user_regset *regset,
1638 unsigned int pos, unsigned int count,
1639 void *kbuf, void __user *ubuf)
1641 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1642 &target->thread.dscr, 0, sizeof(u64));
1644 static int dscr_set(struct task_struct *target,
1645 const struct user_regset *regset,
1646 unsigned int pos, unsigned int count,
1647 const void *kbuf, const void __user *ubuf)
1649 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1650 &target->thread.dscr, 0, sizeof(u64));
1653 #ifdef CONFIG_PPC_BOOK3S_64
1654 static int tar_get(struct task_struct *target,
1655 const struct user_regset *regset,
1656 unsigned int pos, unsigned int count,
1657 void *kbuf, void __user *ubuf)
1659 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1660 &target->thread.tar, 0, sizeof(u64));
1662 static int tar_set(struct task_struct *target,
1663 const struct user_regset *regset,
1664 unsigned int pos, unsigned int count,
1665 const void *kbuf, const void __user *ubuf)
1667 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1668 &target->thread.tar, 0, sizeof(u64));
1671 static int ebb_active(struct task_struct *target,
1672 const struct user_regset *regset)
1674 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1677 if (target->thread.used_ebb)
1683 static int ebb_get(struct task_struct *target,
1684 const struct user_regset *regset,
1685 unsigned int pos, unsigned int count,
1686 void *kbuf, void __user *ubuf)
1689 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
1690 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
1692 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1695 if (!target->thread.used_ebb)
1698 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1699 &target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
1702 static int ebb_set(struct task_struct *target,
1703 const struct user_regset *regset,
1704 unsigned int pos, unsigned int count,
1705 const void *kbuf, const void __user *ubuf)
1710 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
1711 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
1713 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1716 if (target->thread.used_ebb)
1719 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1720 &target->thread.ebbrr, 0, sizeof(unsigned long));
1723 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1724 &target->thread.ebbhr, sizeof(unsigned long),
1725 2 * sizeof(unsigned long));
1728 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1729 &target->thread.bescr,
1730 2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
1734 static int pmu_active(struct task_struct *target,
1735 const struct user_regset *regset)
1737 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1743 static int pmu_get(struct task_struct *target,
1744 const struct user_regset *regset,
1745 unsigned int pos, unsigned int count,
1746 void *kbuf, void __user *ubuf)
1749 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
1750 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
1751 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
1752 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
1754 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1757 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1758 &target->thread.siar, 0,
1759 5 * sizeof(unsigned long));
1762 static int pmu_set(struct task_struct *target,
1763 const struct user_regset *regset,
1764 unsigned int pos, unsigned int count,
1765 const void *kbuf, const void __user *ubuf)
1770 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
1771 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
1772 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
1773 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
1775 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1778 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1779 &target->thread.siar, 0,
1780 sizeof(unsigned long));
1783 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1784 &target->thread.sdar, sizeof(unsigned long),
1785 2 * sizeof(unsigned long));
1788 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1789 &target->thread.sier, 2 * sizeof(unsigned long),
1790 3 * sizeof(unsigned long));
1793 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1794 &target->thread.mmcr2, 3 * sizeof(unsigned long),
1795 4 * sizeof(unsigned long));
1798 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1799 &target->thread.mmcr0, 4 * sizeof(unsigned long),
1800 5 * sizeof(unsigned long));
1805 #ifdef CONFIG_PPC_MEM_KEYS
1806 static int pkey_active(struct task_struct *target,
1807 const struct user_regset *regset)
1809 if (!arch_pkeys_enabled())
1815 static int pkey_get(struct task_struct *target,
1816 const struct user_regset *regset,
1817 unsigned int pos, unsigned int count,
1818 void *kbuf, void __user *ubuf)
1820 BUILD_BUG_ON(TSO(amr) + sizeof(unsigned long) != TSO(iamr));
1821 BUILD_BUG_ON(TSO(iamr) + sizeof(unsigned long) != TSO(uamor));
1823 if (!arch_pkeys_enabled())
1826 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1827 &target->thread.amr, 0,
1828 ELF_NPKEY * sizeof(unsigned long));
1831 static int pkey_set(struct task_struct *target,
1832 const struct user_regset *regset,
1833 unsigned int pos, unsigned int count,
1834 const void *kbuf, const void __user *ubuf)
1839 if (!arch_pkeys_enabled())
1842 /* Only the AMR can be set from userspace */
1843 if (pos != 0 || count != sizeof(new_amr))
1846 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1847 &new_amr, 0, sizeof(new_amr));
1851 /* UAMOR determines which bits of the AMR can be set from userspace. */
1852 target->thread.amr = (new_amr & target->thread.uamor) |
1853 (target->thread.amr & ~target->thread.uamor);
1857 #endif /* CONFIG_PPC_MEM_KEYS */
1860 * These are our native regset flavors.
1862 enum powerpc_regset {
1865 #ifdef CONFIG_ALTIVEC
1874 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1875 REGSET_TM_CGPR, /* TM checkpointed GPR registers */
1876 REGSET_TM_CFPR, /* TM checkpointed FPR registers */
1877 REGSET_TM_CVMX, /* TM checkpointed VMX registers */
1878 REGSET_TM_CVSX, /* TM checkpointed VSX registers */
1879 REGSET_TM_SPR, /* TM specific SPR registers */
1880 REGSET_TM_CTAR, /* TM checkpointed TAR register */
1881 REGSET_TM_CPPR, /* TM checkpointed PPR register */
1882 REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
1885 REGSET_PPR, /* PPR register */
1886 REGSET_DSCR, /* DSCR register */
1888 #ifdef CONFIG_PPC_BOOK3S_64
1889 REGSET_TAR, /* TAR register */
1890 REGSET_EBB, /* EBB registers */
1891 REGSET_PMR, /* Performance Monitor Registers */
1893 #ifdef CONFIG_PPC_MEM_KEYS
1894 REGSET_PKEY, /* AMR register */
1898 static const struct user_regset native_regsets[] = {
1900 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
1901 .size = sizeof(long), .align = sizeof(long),
1902 .get = gpr_get, .set = gpr_set
1905 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
1906 .size = sizeof(double), .align = sizeof(double),
1907 .get = fpr_get, .set = fpr_set
1909 #ifdef CONFIG_ALTIVEC
1911 .core_note_type = NT_PPC_VMX, .n = 34,
1912 .size = sizeof(vector128), .align = sizeof(vector128),
1913 .active = vr_active, .get = vr_get, .set = vr_set
1918 .core_note_type = NT_PPC_VSX, .n = 32,
1919 .size = sizeof(double), .align = sizeof(double),
1920 .active = vsr_active, .get = vsr_get, .set = vsr_set
1925 .core_note_type = NT_PPC_SPE, .n = 35,
1926 .size = sizeof(u32), .align = sizeof(u32),
1927 .active = evr_active, .get = evr_get, .set = evr_set
1930 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1931 [REGSET_TM_CGPR] = {
1932 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
1933 .size = sizeof(long), .align = sizeof(long),
1934 .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
1936 [REGSET_TM_CFPR] = {
1937 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
1938 .size = sizeof(double), .align = sizeof(double),
1939 .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
1941 [REGSET_TM_CVMX] = {
1942 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
1943 .size = sizeof(vector128), .align = sizeof(vector128),
1944 .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
1946 [REGSET_TM_CVSX] = {
1947 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
1948 .size = sizeof(double), .align = sizeof(double),
1949 .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
1952 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
1953 .size = sizeof(u64), .align = sizeof(u64),
1954 .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
1956 [REGSET_TM_CTAR] = {
1957 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
1958 .size = sizeof(u64), .align = sizeof(u64),
1959 .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
1961 [REGSET_TM_CPPR] = {
1962 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
1963 .size = sizeof(u64), .align = sizeof(u64),
1964 .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
1966 [REGSET_TM_CDSCR] = {
1967 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
1968 .size = sizeof(u64), .align = sizeof(u64),
1969 .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
1974 .core_note_type = NT_PPC_PPR, .n = 1,
1975 .size = sizeof(u64), .align = sizeof(u64),
1976 .get = ppr_get, .set = ppr_set
1979 .core_note_type = NT_PPC_DSCR, .n = 1,
1980 .size = sizeof(u64), .align = sizeof(u64),
1981 .get = dscr_get, .set = dscr_set
1984 #ifdef CONFIG_PPC_BOOK3S_64
1986 .core_note_type = NT_PPC_TAR, .n = 1,
1987 .size = sizeof(u64), .align = sizeof(u64),
1988 .get = tar_get, .set = tar_set
1991 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
1992 .size = sizeof(u64), .align = sizeof(u64),
1993 .active = ebb_active, .get = ebb_get, .set = ebb_set
1996 .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
1997 .size = sizeof(u64), .align = sizeof(u64),
1998 .active = pmu_active, .get = pmu_get, .set = pmu_set
2001 #ifdef CONFIG_PPC_MEM_KEYS
2003 .core_note_type = NT_PPC_PKEY, .n = ELF_NPKEY,
2004 .size = sizeof(u64), .align = sizeof(u64),
2005 .active = pkey_active, .get = pkey_get, .set = pkey_set
2010 static const struct user_regset_view user_ppc_native_view = {
2011 .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
2012 .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
2016 #include <linux/compat.h>
2018 static int gpr32_get_common(struct task_struct *target,
2019 const struct user_regset *regset,
2020 unsigned int pos, unsigned int count,
2021 void *kbuf, void __user *ubuf,
2022 unsigned long *regs)
2024 compat_ulong_t *k = kbuf;
2025 compat_ulong_t __user *u = ubuf;
2029 count /= sizeof(reg);
2032 for (; count > 0 && pos < PT_MSR; --count)
2035 for (; count > 0 && pos < PT_MSR; --count)
2036 if (__put_user((compat_ulong_t) regs[pos++], u++))
2039 if (count > 0 && pos == PT_MSR) {
2040 reg = get_user_msr(target);
2043 else if (__put_user(reg, u++))
2050 for (; count > 0 && pos < PT_REGS_COUNT; --count)
2053 for (; count > 0 && pos < PT_REGS_COUNT; --count)
2054 if (__put_user((compat_ulong_t) regs[pos++], u++))
2060 count *= sizeof(reg);
2061 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
2062 PT_REGS_COUNT * sizeof(reg), -1);
2065 static int gpr32_set_common(struct task_struct *target,
2066 const struct user_regset *regset,
2067 unsigned int pos, unsigned int count,
2068 const void *kbuf, const void __user *ubuf,
2069 unsigned long *regs)
2071 const compat_ulong_t *k = kbuf;
2072 const compat_ulong_t __user *u = ubuf;
2076 count /= sizeof(reg);
2079 for (; count > 0 && pos < PT_MSR; --count)
2082 for (; count > 0 && pos < PT_MSR; --count) {
2083 if (__get_user(reg, u++))
2089 if (count > 0 && pos == PT_MSR) {
2092 else if (__get_user(reg, u++))
2094 set_user_msr(target, reg);
2100 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
2102 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
2105 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
2106 if (__get_user(reg, u++))
2110 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
2111 if (__get_user(reg, u++))
2115 if (count > 0 && pos == PT_TRAP) {
2118 else if (__get_user(reg, u++))
2120 set_user_trap(target, reg);
2128 count *= sizeof(reg);
2129 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
2130 (PT_TRAP + 1) * sizeof(reg), -1);
2133 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2134 static int tm_cgpr32_get(struct task_struct *target,
2135 const struct user_regset *regset,
2136 unsigned int pos, unsigned int count,
2137 void *kbuf, void __user *ubuf)
2139 return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
2140 &target->thread.ckpt_regs.gpr[0]);
2143 static int tm_cgpr32_set(struct task_struct *target,
2144 const struct user_regset *regset,
2145 unsigned int pos, unsigned int count,
2146 const void *kbuf, const void __user *ubuf)
2148 return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
2149 &target->thread.ckpt_regs.gpr[0]);
2151 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
2153 static int gpr32_get(struct task_struct *target,
2154 const struct user_regset *regset,
2155 unsigned int pos, unsigned int count,
2156 void *kbuf, void __user *ubuf)
2160 if (target->thread.regs == NULL)
2163 if (!FULL_REGS(target->thread.regs)) {
2165 * We have a partial register set.
2166 * Fill 14-31 with bogus values.
2168 for (i = 14; i < 32; i++)
2169 target->thread.regs->gpr[i] = NV_REG_POISON;
2171 return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
2172 &target->thread.regs->gpr[0]);
2175 static int gpr32_set(struct task_struct *target,
2176 const struct user_regset *regset,
2177 unsigned int pos, unsigned int count,
2178 const void *kbuf, const void __user *ubuf)
2180 if (target->thread.regs == NULL)
2183 CHECK_FULL_REGS(target->thread.regs);
2184 return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
2185 &target->thread.regs->gpr[0]);
2189 * These are the regset flavors matching the CONFIG_PPC32 native set.
2191 static const struct user_regset compat_regsets[] = {
2193 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
2194 .size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
2195 .get = gpr32_get, .set = gpr32_set
2198 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
2199 .size = sizeof(double), .align = sizeof(double),
2200 .get = fpr_get, .set = fpr_set
2202 #ifdef CONFIG_ALTIVEC
2204 .core_note_type = NT_PPC_VMX, .n = 34,
2205 .size = sizeof(vector128), .align = sizeof(vector128),
2206 .active = vr_active, .get = vr_get, .set = vr_set
2211 .core_note_type = NT_PPC_SPE, .n = 35,
2212 .size = sizeof(u32), .align = sizeof(u32),
2213 .active = evr_active, .get = evr_get, .set = evr_set
2216 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2217 [REGSET_TM_CGPR] = {
2218 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
2219 .size = sizeof(long), .align = sizeof(long),
2220 .active = tm_cgpr_active,
2221 .get = tm_cgpr32_get, .set = tm_cgpr32_set
2223 [REGSET_TM_CFPR] = {
2224 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
2225 .size = sizeof(double), .align = sizeof(double),
2226 .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
2228 [REGSET_TM_CVMX] = {
2229 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
2230 .size = sizeof(vector128), .align = sizeof(vector128),
2231 .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
2233 [REGSET_TM_CVSX] = {
2234 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
2235 .size = sizeof(double), .align = sizeof(double),
2236 .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
2239 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
2240 .size = sizeof(u64), .align = sizeof(u64),
2241 .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
2243 [REGSET_TM_CTAR] = {
2244 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
2245 .size = sizeof(u64), .align = sizeof(u64),
2246 .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
2248 [REGSET_TM_CPPR] = {
2249 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
2250 .size = sizeof(u64), .align = sizeof(u64),
2251 .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
2253 [REGSET_TM_CDSCR] = {
2254 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
2255 .size = sizeof(u64), .align = sizeof(u64),
2256 .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
2261 .core_note_type = NT_PPC_PPR, .n = 1,
2262 .size = sizeof(u64), .align = sizeof(u64),
2263 .get = ppr_get, .set = ppr_set
2266 .core_note_type = NT_PPC_DSCR, .n = 1,
2267 .size = sizeof(u64), .align = sizeof(u64),
2268 .get = dscr_get, .set = dscr_set
2271 #ifdef CONFIG_PPC_BOOK3S_64
2273 .core_note_type = NT_PPC_TAR, .n = 1,
2274 .size = sizeof(u64), .align = sizeof(u64),
2275 .get = tar_get, .set = tar_set
2278 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
2279 .size = sizeof(u64), .align = sizeof(u64),
2280 .active = ebb_active, .get = ebb_get, .set = ebb_set
2285 static const struct user_regset_view user_ppc_compat_view = {
2286 .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI,
2287 .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets)
2289 #endif /* CONFIG_PPC64 */
2291 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
2294 if (test_tsk_thread_flag(task, TIF_32BIT))
2295 return &user_ppc_compat_view;
2297 return &user_ppc_native_view;
2301 void user_enable_single_step(struct task_struct *task)
2303 struct pt_regs *regs = task->thread.regs;
2306 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2307 task->thread.debug.dbcr0 &= ~DBCR0_BT;
2308 task->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2309 regs->msr |= MSR_DE;
2311 regs->msr &= ~MSR_BE;
2312 regs->msr |= MSR_SE;
2315 set_tsk_thread_flag(task, TIF_SINGLESTEP);
2318 void user_enable_block_step(struct task_struct *task)
2320 struct pt_regs *regs = task->thread.regs;
2323 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2324 task->thread.debug.dbcr0 &= ~DBCR0_IC;
2325 task->thread.debug.dbcr0 = DBCR0_IDM | DBCR0_BT;
2326 regs->msr |= MSR_DE;
2328 regs->msr &= ~MSR_SE;
2329 regs->msr |= MSR_BE;
2332 set_tsk_thread_flag(task, TIF_SINGLESTEP);
2335 void user_disable_single_step(struct task_struct *task)
2337 struct pt_regs *regs = task->thread.regs;
2340 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2342 * The logic to disable single stepping should be as
2343 * simple as turning off the Instruction Complete flag.
2344 * And, after doing so, if all debug flags are off, turn
2345 * off DBCR0(IDM) and MSR(DE) .... Torez
2347 task->thread.debug.dbcr0 &= ~(DBCR0_IC|DBCR0_BT);
2349 * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.
2351 if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
2352 task->thread.debug.dbcr1)) {
2354 * All debug events were off.....
2356 task->thread.debug.dbcr0 &= ~DBCR0_IDM;
2357 regs->msr &= ~MSR_DE;
2360 regs->msr &= ~(MSR_SE | MSR_BE);
2363 clear_tsk_thread_flag(task, TIF_SINGLESTEP);
2366 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2367 void ptrace_triggered(struct perf_event *bp,
2368 struct perf_sample_data *data, struct pt_regs *regs)
2370 struct perf_event_attr attr;
2373 * Disable the breakpoint request here since ptrace has defined a
2374 * one-shot behaviour for breakpoint exceptions in PPC64.
2375 * The SIGTRAP signal is generated automatically for us in do_dabr().
2376 * We don't have to do anything about that here
2379 attr.disabled = true;
2380 modify_user_hw_breakpoint(bp, &attr);
2382 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2384 static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
2387 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2389 struct thread_struct *thread = &(task->thread);
2390 struct perf_event *bp;
2391 struct perf_event_attr attr;
2392 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2393 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2395 struct arch_hw_breakpoint hw_brk;
2398 /* For ppc64 we support one DABR and no IABR's at the moment (ppc64).
2399 * For embedded processors we support one DAC and no IAC's at the
2405 /* The bottom 3 bits in dabr are flags */
2406 if ((data & ~0x7UL) >= TASK_SIZE)
2409 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2410 /* For processors using DABR (i.e. 970), the bottom 3 bits are flags.
2411 * It was assumed, on previous implementations, that 3 bits were
2412 * passed together with the data address, fitting the design of the
2413 * DABR register, as follows:
2417 * bit 2: Breakpoint translation
2419 * Thus, we use them here as so.
2422 /* Ensure breakpoint translation bit is set */
2423 if (data && !(data & HW_BRK_TYPE_TRANSLATE))
2425 hw_brk.address = data & (~HW_BRK_TYPE_DABR);
2426 hw_brk.type = (data & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
2428 set_bp = (data) && (hw_brk.type & HW_BRK_TYPE_RDWR);
2429 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2430 bp = thread->ptrace_bps[0];
2433 unregister_hw_breakpoint(bp);
2434 thread->ptrace_bps[0] = NULL;
2440 attr.bp_addr = hw_brk.address;
2441 arch_bp_generic_fields(hw_brk.type, &attr.bp_type);
2443 /* Enable breakpoint */
2444 attr.disabled = false;
2446 ret = modify_user_hw_breakpoint(bp, &attr);
2450 thread->ptrace_bps[0] = bp;
2451 thread->hw_brk = hw_brk;
2455 /* Create a new breakpoint request if one doesn't exist already */
2456 hw_breakpoint_init(&attr);
2457 attr.bp_addr = hw_brk.address;
2459 arch_bp_generic_fields(hw_brk.type,
2462 thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
2463 ptrace_triggered, NULL, task);
2465 thread->ptrace_bps[0] = NULL;
2469 #else /* !CONFIG_HAVE_HW_BREAKPOINT */
2470 if (set_bp && (!ppc_breakpoint_available()))
2472 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2473 task->thread.hw_brk = hw_brk;
2474 #else /* CONFIG_PPC_ADV_DEBUG_REGS */
2475 /* As described above, it was assumed 3 bits were passed with the data
2476 * address, but we will assume only the mode bits will be passed
2477 * as to not cause alignment restrictions for DAC-based processors.
2480 /* DAC's hold the whole address without any mode flags */
2481 task->thread.debug.dac1 = data & ~0x3UL;
2483 if (task->thread.debug.dac1 == 0) {
2484 dbcr_dac(task) &= ~(DBCR_DAC1R | DBCR_DAC1W);
2485 if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
2486 task->thread.debug.dbcr1)) {
2487 task->thread.regs->msr &= ~MSR_DE;
2488 task->thread.debug.dbcr0 &= ~DBCR0_IDM;
2493 /* Read or Write bits must be set */
2495 if (!(data & 0x3UL))
2498 /* Set the Internal Debugging flag (IDM bit 1) for the DBCR0
2500 task->thread.debug.dbcr0 |= DBCR0_IDM;
2502 /* Check for write and read flags and set DBCR0
2504 dbcr_dac(task) &= ~(DBCR_DAC1R|DBCR_DAC1W);
2506 dbcr_dac(task) |= DBCR_DAC1R;
2508 dbcr_dac(task) |= DBCR_DAC1W;
2509 task->thread.regs->msr |= MSR_DE;
2510 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
2515 * Called by kernel/ptrace.c when detaching..
2517 * Make sure single step bits etc are not set.
2519 void ptrace_disable(struct task_struct *child)
2521 /* make sure the single step bit is not set. */
2522 user_disable_single_step(child);
2523 clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
2526 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2527 static long set_instruction_bp(struct task_struct *child,
2528 struct ppc_hw_breakpoint *bp_info)
2531 int slot1_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC1) != 0);
2532 int slot2_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC2) != 0);
2533 int slot3_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC3) != 0);
2534 int slot4_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC4) != 0);
2536 if (dbcr_iac_range(child) & DBCR_IAC12MODE)
2538 if (dbcr_iac_range(child) & DBCR_IAC34MODE)
2541 if (bp_info->addr >= TASK_SIZE)
2544 if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT) {
2546 /* Make sure range is valid. */
2547 if (bp_info->addr2 >= TASK_SIZE)
2550 /* We need a pair of IAC regsisters */
2551 if ((!slot1_in_use) && (!slot2_in_use)) {
2553 child->thread.debug.iac1 = bp_info->addr;
2554 child->thread.debug.iac2 = bp_info->addr2;
2555 child->thread.debug.dbcr0 |= DBCR0_IAC1;
2556 if (bp_info->addr_mode ==
2557 PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2558 dbcr_iac_range(child) |= DBCR_IAC12X;
2560 dbcr_iac_range(child) |= DBCR_IAC12I;
2561 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2562 } else if ((!slot3_in_use) && (!slot4_in_use)) {
2564 child->thread.debug.iac3 = bp_info->addr;
2565 child->thread.debug.iac4 = bp_info->addr2;
2566 child->thread.debug.dbcr0 |= DBCR0_IAC3;
2567 if (bp_info->addr_mode ==
2568 PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2569 dbcr_iac_range(child) |= DBCR_IAC34X;
2571 dbcr_iac_range(child) |= DBCR_IAC34I;
2576 /* We only need one. If possible leave a pair free in
2577 * case a range is needed later
2579 if (!slot1_in_use) {
2581 * Don't use iac1 if iac1-iac2 are free and either
2582 * iac3 or iac4 (but not both) are free
2584 if (slot2_in_use || (slot3_in_use == slot4_in_use)) {
2586 child->thread.debug.iac1 = bp_info->addr;
2587 child->thread.debug.dbcr0 |= DBCR0_IAC1;
2591 if (!slot2_in_use) {
2593 child->thread.debug.iac2 = bp_info->addr;
2594 child->thread.debug.dbcr0 |= DBCR0_IAC2;
2595 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2596 } else if (!slot3_in_use) {
2598 child->thread.debug.iac3 = bp_info->addr;
2599 child->thread.debug.dbcr0 |= DBCR0_IAC3;
2600 } else if (!slot4_in_use) {
2602 child->thread.debug.iac4 = bp_info->addr;
2603 child->thread.debug.dbcr0 |= DBCR0_IAC4;
2609 child->thread.debug.dbcr0 |= DBCR0_IDM;
2610 child->thread.regs->msr |= MSR_DE;
2615 static int del_instruction_bp(struct task_struct *child, int slot)
2619 if ((child->thread.debug.dbcr0 & DBCR0_IAC1) == 0)
2622 if (dbcr_iac_range(child) & DBCR_IAC12MODE) {
2623 /* address range - clear slots 1 & 2 */
2624 child->thread.debug.iac2 = 0;
2625 dbcr_iac_range(child) &= ~DBCR_IAC12MODE;
2627 child->thread.debug.iac1 = 0;
2628 child->thread.debug.dbcr0 &= ~DBCR0_IAC1;
2631 if ((child->thread.debug.dbcr0 & DBCR0_IAC2) == 0)
2634 if (dbcr_iac_range(child) & DBCR_IAC12MODE)
2635 /* used in a range */
2637 child->thread.debug.iac2 = 0;
2638 child->thread.debug.dbcr0 &= ~DBCR0_IAC2;
2640 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2642 if ((child->thread.debug.dbcr0 & DBCR0_IAC3) == 0)
2645 if (dbcr_iac_range(child) & DBCR_IAC34MODE) {
2646 /* address range - clear slots 3 & 4 */
2647 child->thread.debug.iac4 = 0;
2648 dbcr_iac_range(child) &= ~DBCR_IAC34MODE;
2650 child->thread.debug.iac3 = 0;
2651 child->thread.debug.dbcr0 &= ~DBCR0_IAC3;
2654 if ((child->thread.debug.dbcr0 & DBCR0_IAC4) == 0)
2657 if (dbcr_iac_range(child) & DBCR_IAC34MODE)
2658 /* Used in a range */
2660 child->thread.debug.iac4 = 0;
2661 child->thread.debug.dbcr0 &= ~DBCR0_IAC4;
2670 static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info)
2673 (bp_info->condition_mode >> PPC_BREAKPOINT_CONDITION_BE_SHIFT)
2675 int condition_mode =
2676 bp_info->condition_mode & PPC_BREAKPOINT_CONDITION_MODE;
2679 if (byte_enable && (condition_mode == 0))
2682 if (bp_info->addr >= TASK_SIZE)
2685 if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0) {
2687 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2688 dbcr_dac(child) |= DBCR_DAC1R;
2689 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2690 dbcr_dac(child) |= DBCR_DAC1W;
2691 child->thread.debug.dac1 = (unsigned long)bp_info->addr;
2692 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2694 child->thread.debug.dvc1 =
2695 (unsigned long)bp_info->condition_value;
2696 child->thread.debug.dbcr2 |=
2697 ((byte_enable << DBCR2_DVC1BE_SHIFT) |
2698 (condition_mode << DBCR2_DVC1M_SHIFT));
2701 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2702 } else if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
2703 /* Both dac1 and dac2 are part of a range */
2706 } else if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0) {
2708 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2709 dbcr_dac(child) |= DBCR_DAC2R;
2710 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2711 dbcr_dac(child) |= DBCR_DAC2W;
2712 child->thread.debug.dac2 = (unsigned long)bp_info->addr;
2713 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2715 child->thread.debug.dvc2 =
2716 (unsigned long)bp_info->condition_value;
2717 child->thread.debug.dbcr2 |=
2718 ((byte_enable << DBCR2_DVC2BE_SHIFT) |
2719 (condition_mode << DBCR2_DVC2M_SHIFT));
2724 child->thread.debug.dbcr0 |= DBCR0_IDM;
2725 child->thread.regs->msr |= MSR_DE;
2730 static int del_dac(struct task_struct *child, int slot)
2733 if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0)
2736 child->thread.debug.dac1 = 0;
2737 dbcr_dac(child) &= ~(DBCR_DAC1R | DBCR_DAC1W);
2738 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2739 if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
2740 child->thread.debug.dac2 = 0;
2741 child->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;
2743 child->thread.debug.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);
2745 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2746 child->thread.debug.dvc1 = 0;
2748 } else if (slot == 2) {
2749 if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0)
2752 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2753 if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE)
2754 /* Part of a range */
2756 child->thread.debug.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);
2758 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2759 child->thread.debug.dvc2 = 0;
2761 child->thread.debug.dac2 = 0;
2762 dbcr_dac(child) &= ~(DBCR_DAC2R | DBCR_DAC2W);
2768 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
2770 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2771 static int set_dac_range(struct task_struct *child,
2772 struct ppc_hw_breakpoint *bp_info)
2774 int mode = bp_info->addr_mode & PPC_BREAKPOINT_MODE_MASK;
2776 /* We don't allow range watchpoints to be used with DVC */
2777 if (bp_info->condition_mode)
2781 * Best effort to verify the address range. The user/supervisor bits
2782 * prevent trapping in kernel space, but let's fail on an obvious bad
2783 * range. The simple test on the mask is not fool-proof, and any
2784 * exclusive range will spill over into kernel space.
2786 if (bp_info->addr >= TASK_SIZE)
2788 if (mode == PPC_BREAKPOINT_MODE_MASK) {
2790 * dac2 is a bitmask. Don't allow a mask that makes a
2791 * kernel space address from a valid dac1 value
2793 if (~((unsigned long)bp_info->addr2) >= TASK_SIZE)
2797 * For range breakpoints, addr2 must also be a valid address
2799 if (bp_info->addr2 >= TASK_SIZE)
2803 if (child->thread.debug.dbcr0 &
2804 (DBCR0_DAC1R | DBCR0_DAC1W | DBCR0_DAC2R | DBCR0_DAC2W))
2807 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2808 child->thread.debug.dbcr0 |= (DBCR0_DAC1R | DBCR0_IDM);
2809 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2810 child->thread.debug.dbcr0 |= (DBCR0_DAC1W | DBCR0_IDM);
2811 child->thread.debug.dac1 = bp_info->addr;
2812 child->thread.debug.dac2 = bp_info->addr2;
2813 if (mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
2814 child->thread.debug.dbcr2 |= DBCR2_DAC12M;
2815 else if (mode == PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2816 child->thread.debug.dbcr2 |= DBCR2_DAC12MX;
2817 else /* PPC_BREAKPOINT_MODE_MASK */
2818 child->thread.debug.dbcr2 |= DBCR2_DAC12MM;
2819 child->thread.regs->msr |= MSR_DE;
2823 #endif /* CONFIG_PPC_ADV_DEBUG_DAC_RANGE */
2825 static long ppc_set_hwdebug(struct task_struct *child,
2826 struct ppc_hw_breakpoint *bp_info)
2828 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2830 struct thread_struct *thread = &(child->thread);
2831 struct perf_event *bp;
2832 struct perf_event_attr attr;
2833 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2834 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2835 struct arch_hw_breakpoint brk;
2838 if (bp_info->version != 1)
2840 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2842 * Check for invalid flags and combinations
2844 if ((bp_info->trigger_type == 0) ||
2845 (bp_info->trigger_type & ~(PPC_BREAKPOINT_TRIGGER_EXECUTE |
2846 PPC_BREAKPOINT_TRIGGER_RW)) ||
2847 (bp_info->addr_mode & ~PPC_BREAKPOINT_MODE_MASK) ||
2848 (bp_info->condition_mode &
2849 ~(PPC_BREAKPOINT_CONDITION_MODE |
2850 PPC_BREAKPOINT_CONDITION_BE_ALL)))
2852 #if CONFIG_PPC_ADV_DEBUG_DVCS == 0
2853 if (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
2857 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_EXECUTE) {
2858 if ((bp_info->trigger_type != PPC_BREAKPOINT_TRIGGER_EXECUTE) ||
2859 (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE))
2861 return set_instruction_bp(child, bp_info);
2863 if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
2864 return set_dac(child, bp_info);
2866 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2867 return set_dac_range(child, bp_info);
2871 #else /* !CONFIG_PPC_ADV_DEBUG_DVCS */
2873 * We only support one data breakpoint
2875 if ((bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_RW) == 0 ||
2876 (bp_info->trigger_type & ~PPC_BREAKPOINT_TRIGGER_RW) != 0 ||
2877 bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
2880 if ((unsigned long)bp_info->addr >= TASK_SIZE)
2883 brk.address = bp_info->addr & ~7UL;
2884 brk.type = HW_BRK_TYPE_TRANSLATE;
2886 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2887 brk.type |= HW_BRK_TYPE_READ;
2888 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2889 brk.type |= HW_BRK_TYPE_WRITE;
2890 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2892 * Check if the request is for 'range' breakpoints. We can
2893 * support it if range < 8 bytes.
2895 if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
2896 len = bp_info->addr2 - bp_info->addr;
2897 else if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
2901 bp = thread->ptrace_bps[0];
2905 /* Create a new breakpoint request if one doesn't exist already */
2906 hw_breakpoint_init(&attr);
2907 attr.bp_addr = (unsigned long)bp_info->addr & ~HW_BREAKPOINT_ALIGN;
2909 arch_bp_generic_fields(brk.type, &attr.bp_type);
2911 thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
2912 ptrace_triggered, NULL, child);
2914 thread->ptrace_bps[0] = NULL;
2919 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2921 if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT)
2924 if (child->thread.hw_brk.address)
2927 if (!ppc_breakpoint_available())
2930 child->thread.hw_brk = brk;
2933 #endif /* !CONFIG_PPC_ADV_DEBUG_DVCS */
2936 static long ppc_del_hwdebug(struct task_struct *child, long data)
2938 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2940 struct thread_struct *thread = &(child->thread);
2941 struct perf_event *bp;
2942 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2943 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2947 rc = del_instruction_bp(child, (int)data);
2949 rc = del_dac(child, (int)data - 4);
2952 if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0,
2953 child->thread.debug.dbcr1)) {
2954 child->thread.debug.dbcr0 &= ~DBCR0_IDM;
2955 child->thread.regs->msr &= ~MSR_DE;
2963 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2964 bp = thread->ptrace_bps[0];
2966 unregister_hw_breakpoint(bp);
2967 thread->ptrace_bps[0] = NULL;
2971 #else /* CONFIG_HAVE_HW_BREAKPOINT */
2972 if (child->thread.hw_brk.address == 0)
2975 child->thread.hw_brk.address = 0;
2976 child->thread.hw_brk.type = 0;
2977 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2983 long arch_ptrace(struct task_struct *child, long request,
2984 unsigned long addr, unsigned long data)
2987 void __user *datavp = (void __user *) data;
2988 unsigned long __user *datalp = datavp;
2991 /* read the word at location addr in the USER area. */
2992 case PTRACE_PEEKUSR: {
2993 unsigned long index, tmp;
2996 /* convert to index and check */
2999 if ((addr & 3) || (index > PT_FPSCR)
3000 || (child->thread.regs == NULL))
3003 if ((addr & 7) || (index > PT_FPSCR))
3007 CHECK_FULL_REGS(child->thread.regs);
3008 if (index < PT_FPR0) {
3009 ret = ptrace_get_reg(child, (int) index, &tmp);
3013 unsigned int fpidx = index - PT_FPR0;
3015 flush_fp_to_thread(child);
3016 if (fpidx < (PT_FPSCR - PT_FPR0))
3017 memcpy(&tmp, &child->thread.TS_FPR(fpidx),
3020 tmp = child->thread.fp_state.fpscr;
3022 ret = put_user(tmp, datalp);
3026 /* write the word at location addr in the USER area */
3027 case PTRACE_POKEUSR: {
3028 unsigned long index;
3031 /* convert to index and check */
3034 if ((addr & 3) || (index > PT_FPSCR)
3035 || (child->thread.regs == NULL))
3038 if ((addr & 7) || (index > PT_FPSCR))
3042 CHECK_FULL_REGS(child->thread.regs);
3043 if (index < PT_FPR0) {
3044 ret = ptrace_put_reg(child, index, data);
3046 unsigned int fpidx = index - PT_FPR0;
3048 flush_fp_to_thread(child);
3049 if (fpidx < (PT_FPSCR - PT_FPR0))
3050 memcpy(&child->thread.TS_FPR(fpidx), &data,
3053 child->thread.fp_state.fpscr = data;
3059 case PPC_PTRACE_GETHWDBGINFO: {
3060 struct ppc_debug_info dbginfo;
3062 dbginfo.version = 1;
3063 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
3064 dbginfo.num_instruction_bps = CONFIG_PPC_ADV_DEBUG_IACS;
3065 dbginfo.num_data_bps = CONFIG_PPC_ADV_DEBUG_DACS;
3066 dbginfo.num_condition_regs = CONFIG_PPC_ADV_DEBUG_DVCS;
3067 dbginfo.data_bp_alignment = 4;
3068 dbginfo.sizeof_condition = 4;
3069 dbginfo.features = PPC_DEBUG_FEATURE_INSN_BP_RANGE |
3070 PPC_DEBUG_FEATURE_INSN_BP_MASK;
3071 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
3073 PPC_DEBUG_FEATURE_DATA_BP_RANGE |
3074 PPC_DEBUG_FEATURE_DATA_BP_MASK;
3076 #else /* !CONFIG_PPC_ADV_DEBUG_REGS */
3077 dbginfo.num_instruction_bps = 0;
3078 if (ppc_breakpoint_available())
3079 dbginfo.num_data_bps = 1;
3081 dbginfo.num_data_bps = 0;
3082 dbginfo.num_condition_regs = 0;
3084 dbginfo.data_bp_alignment = 8;
3086 dbginfo.data_bp_alignment = 4;
3088 dbginfo.sizeof_condition = 0;
3089 #ifdef CONFIG_HAVE_HW_BREAKPOINT
3090 dbginfo.features = PPC_DEBUG_FEATURE_DATA_BP_RANGE;
3091 if (cpu_has_feature(CPU_FTR_DAWR))
3092 dbginfo.features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR;
3094 dbginfo.features = 0;
3095 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
3096 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
3098 if (copy_to_user(datavp, &dbginfo,
3099 sizeof(struct ppc_debug_info)))
3104 case PPC_PTRACE_SETHWDEBUG: {
3105 struct ppc_hw_breakpoint bp_info;
3107 if (copy_from_user(&bp_info, datavp,
3108 sizeof(struct ppc_hw_breakpoint)))
3110 return ppc_set_hwdebug(child, &bp_info);
3113 case PPC_PTRACE_DELHWDEBUG: {
3114 ret = ppc_del_hwdebug(child, data);
3118 case PTRACE_GET_DEBUGREG: {
3119 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
3120 unsigned long dabr_fake;
3123 /* We only support one DABR and no IABRS at the moment */
3126 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
3127 ret = put_user(child->thread.debug.dac1, datalp);
3129 dabr_fake = ((child->thread.hw_brk.address & (~HW_BRK_TYPE_DABR)) |
3130 (child->thread.hw_brk.type & HW_BRK_TYPE_DABR));
3131 ret = put_user(dabr_fake, datalp);
3136 case PTRACE_SET_DEBUGREG:
3137 ret = ptrace_set_debugreg(child, addr, data);
3141 case PTRACE_GETREGS64:
3143 case PTRACE_GETREGS: /* Get all pt_regs from the child. */
3144 return copy_regset_to_user(child, &user_ppc_native_view,
3146 0, sizeof(struct user_pt_regs),
3150 case PTRACE_SETREGS64:
3152 case PTRACE_SETREGS: /* Set all gp regs in the child. */
3153 return copy_regset_from_user(child, &user_ppc_native_view,
3155 0, sizeof(struct user_pt_regs),
3158 case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */
3159 return copy_regset_to_user(child, &user_ppc_native_view,
3161 0, sizeof(elf_fpregset_t),
3164 case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */
3165 return copy_regset_from_user(child, &user_ppc_native_view,
3167 0, sizeof(elf_fpregset_t),
3170 #ifdef CONFIG_ALTIVEC
3171 case PTRACE_GETVRREGS:
3172 return copy_regset_to_user(child, &user_ppc_native_view,
3174 0, (33 * sizeof(vector128) +
3178 case PTRACE_SETVRREGS:
3179 return copy_regset_from_user(child, &user_ppc_native_view,
3181 0, (33 * sizeof(vector128) +
3186 case PTRACE_GETVSRREGS:
3187 return copy_regset_to_user(child, &user_ppc_native_view,
3189 0, 32 * sizeof(double),
3192 case PTRACE_SETVSRREGS:
3193 return copy_regset_from_user(child, &user_ppc_native_view,
3195 0, 32 * sizeof(double),
3199 case PTRACE_GETEVRREGS:
3200 /* Get the child spe register state. */
3201 return copy_regset_to_user(child, &user_ppc_native_view,
3202 REGSET_SPE, 0, 35 * sizeof(u32),
3205 case PTRACE_SETEVRREGS:
3206 /* Set the child spe register state. */
3207 return copy_regset_from_user(child, &user_ppc_native_view,
3208 REGSET_SPE, 0, 35 * sizeof(u32),
3213 ret = ptrace_request(child, request, addr, data);
3219 #ifdef CONFIG_SECCOMP
3220 static int do_seccomp(struct pt_regs *regs)
3222 if (!test_thread_flag(TIF_SECCOMP))
3226 * The ABI we present to seccomp tracers is that r3 contains
3227 * the syscall return value and orig_gpr3 contains the first
3228 * syscall parameter. This is different to the ptrace ABI where
3229 * both r3 and orig_gpr3 contain the first syscall parameter.
3231 regs->gpr[3] = -ENOSYS;
3234 * We use the __ version here because we have already checked
3235 * TIF_SECCOMP. If this fails, there is nothing left to do, we
3236 * have already loaded -ENOSYS into r3, or seccomp has put
3237 * something else in r3 (via SECCOMP_RET_ERRNO/TRACE).
3239 if (__secure_computing(NULL))
3243 * The syscall was allowed by seccomp, restore the register
3244 * state to what audit expects.
3245 * Note that we use orig_gpr3, which means a seccomp tracer can
3246 * modify the first syscall parameter (in orig_gpr3) and also
3247 * allow the syscall to proceed.
3249 regs->gpr[3] = regs->orig_gpr3;
3254 static inline int do_seccomp(struct pt_regs *regs) { return 0; }
3255 #endif /* CONFIG_SECCOMP */
3258 * do_syscall_trace_enter() - Do syscall tracing on kernel entry.
3259 * @regs: the pt_regs of the task to trace (current)
3261 * Performs various types of tracing on syscall entry. This includes seccomp,
3262 * ptrace, syscall tracepoints and audit.
3264 * The pt_regs are potentially visible to userspace via ptrace, so their
3267 * One or more of the tracers may modify the contents of pt_regs, in particular
3268 * to modify arguments or even the syscall number itself.
3270 * It's also possible that a tracer can choose to reject the system call. In
3271 * that case this function will return an illegal syscall number, and will put
3272 * an appropriate return value in regs->r3.
3274 * Return: the (possibly changed) syscall number.
3276 long do_syscall_trace_enter(struct pt_regs *regs)
3282 flags = READ_ONCE(current_thread_info()->flags) &
3283 (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
3286 int rc = tracehook_report_syscall_entry(regs);
3288 if (unlikely(flags & _TIF_SYSCALL_EMU)) {
3290 * A nonzero return code from
3291 * tracehook_report_syscall_entry() tells us to prevent
3292 * the syscall execution, but we are not going to
3293 * execute it anyway.
3295 * Returning -1 will skip the syscall execution. We want
3296 * to avoid clobbering any registers, so we don't goto
3297 * the skip label below.
3304 * The tracer decided to abort the syscall. Note that
3305 * the tracer may also just change regs->gpr[0] to an
3306 * invalid syscall number, that is handled below on the
3313 /* Run seccomp after ptrace; allow it to set gpr[3]. */
3314 if (do_seccomp(regs))
3317 /* Avoid trace and audit when syscall is invalid. */
3318 if (regs->gpr[0] >= NR_syscalls)
3321 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
3322 trace_sys_enter(regs, regs->gpr[0]);
3325 if (!is_32bit_task())
3326 audit_syscall_entry(regs->gpr[0], regs->gpr[3], regs->gpr[4],
3327 regs->gpr[5], regs->gpr[6]);
3330 audit_syscall_entry(regs->gpr[0],
3331 regs->gpr[3] & 0xffffffff,
3332 regs->gpr[4] & 0xffffffff,
3333 regs->gpr[5] & 0xffffffff,
3334 regs->gpr[6] & 0xffffffff);
3336 /* Return the possibly modified but valid syscall number */
3337 return regs->gpr[0];
3341 * If we are aborting explicitly, or if the syscall number is
3342 * now invalid, set the return value to -ENOSYS.
3344 regs->gpr[3] = -ENOSYS;
3348 void do_syscall_trace_leave(struct pt_regs *regs)
3352 audit_syscall_exit(regs);
3354 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
3355 trace_sys_exit(regs, regs->result);
3357 step = test_thread_flag(TIF_SINGLESTEP);
3358 if (step || test_thread_flag(TIF_SYSCALL_TRACE))
3359 tracehook_report_syscall_exit(regs, step);
3364 void __init pt_regs_check(void)
3366 BUILD_BUG_ON(offsetof(struct pt_regs, gpr) !=
3367 offsetof(struct user_pt_regs, gpr));
3368 BUILD_BUG_ON(offsetof(struct pt_regs, nip) !=
3369 offsetof(struct user_pt_regs, nip));
3370 BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
3371 offsetof(struct user_pt_regs, msr));
3372 BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
3373 offsetof(struct user_pt_regs, msr));
3374 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
3375 offsetof(struct user_pt_regs, orig_gpr3));
3376 BUILD_BUG_ON(offsetof(struct pt_regs, ctr) !=
3377 offsetof(struct user_pt_regs, ctr));
3378 BUILD_BUG_ON(offsetof(struct pt_regs, link) !=
3379 offsetof(struct user_pt_regs, link));
3380 BUILD_BUG_ON(offsetof(struct pt_regs, xer) !=
3381 offsetof(struct user_pt_regs, xer));
3382 BUILD_BUG_ON(offsetof(struct pt_regs, ccr) !=
3383 offsetof(struct user_pt_regs, ccr));
3384 #ifdef __powerpc64__
3385 BUILD_BUG_ON(offsetof(struct pt_regs, softe) !=
3386 offsetof(struct user_pt_regs, softe));
3388 BUILD_BUG_ON(offsetof(struct pt_regs, mq) !=
3389 offsetof(struct user_pt_regs, mq));
3391 BUILD_BUG_ON(offsetof(struct pt_regs, trap) !=
3392 offsetof(struct user_pt_regs, trap));
3393 BUILD_BUG_ON(offsetof(struct pt_regs, dar) !=
3394 offsetof(struct user_pt_regs, dar));
3395 BUILD_BUG_ON(offsetof(struct pt_regs, dsisr) !=
3396 offsetof(struct user_pt_regs, dsisr));
3397 BUILD_BUG_ON(offsetof(struct pt_regs, result) !=
3398 offsetof(struct user_pt_regs, result));
3400 BUILD_BUG_ON(sizeof(struct user_pt_regs) > sizeof(struct pt_regs));