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>
37 #include <linux/uaccess.h>
38 #include <linux/pkeys.h>
40 #include <asm/pgtable.h>
41 #include <asm/switch_to.h>
43 #include <asm/asm-prototypes.h>
44 #include <asm/debug.h>
46 #define CREATE_TRACE_POINTS
47 #include <trace/events/syscalls.h>
50 * The parameter save area on the stack is used to store arguments being passed
51 * to callee function and is located at fixed offset from stack pointer.
54 #define PARAMETER_SAVE_AREA_OFFSET 24 /* bytes */
55 #else /* CONFIG_PPC32 */
56 #define PARAMETER_SAVE_AREA_OFFSET 48 /* bytes */
59 struct pt_regs_offset {
64 #define STR(s) #s /* convert to string */
65 #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
66 #define GPR_OFFSET_NAME(num) \
67 {.name = STR(r##num), .offset = offsetof(struct pt_regs, gpr[num])}, \
68 {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
69 #define REG_OFFSET_END {.name = NULL, .offset = 0}
71 #define TVSO(f) (offsetof(struct thread_vr_state, f))
72 #define TFSO(f) (offsetof(struct thread_fp_state, f))
73 #define TSO(f) (offsetof(struct thread_struct, f))
75 static const struct pt_regs_offset regoffset_table[] = {
108 REG_OFFSET_NAME(nip),
109 REG_OFFSET_NAME(msr),
110 REG_OFFSET_NAME(ctr),
111 REG_OFFSET_NAME(link),
112 REG_OFFSET_NAME(xer),
113 REG_OFFSET_NAME(ccr),
115 REG_OFFSET_NAME(softe),
119 REG_OFFSET_NAME(trap),
120 REG_OFFSET_NAME(dar),
121 REG_OFFSET_NAME(dsisr),
125 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
126 static void flush_tmregs_to_thread(struct task_struct *tsk)
129 * If task is not current, it will have been flushed already to
130 * it's thread_struct during __switch_to().
132 * A reclaim flushes ALL the state or if not in TM save TM SPRs
133 * in the appropriate thread structures from live.
136 if ((!cpu_has_feature(CPU_FTR_TM)) || (tsk != current))
139 if (MSR_TM_SUSPENDED(mfmsr())) {
140 tm_reclaim_current(TM_CAUSE_SIGNAL);
143 tm_save_sprs(&(tsk->thread));
147 static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
151 * regs_query_register_offset() - query register offset from its name
152 * @name: the name of a register
154 * regs_query_register_offset() returns the offset of a register in struct
155 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
157 int regs_query_register_offset(const char *name)
159 const struct pt_regs_offset *roff;
160 for (roff = regoffset_table; roff->name != NULL; roff++)
161 if (!strcmp(roff->name, name))
167 * regs_query_register_name() - query register name from its offset
168 * @offset: the offset of a register in struct pt_regs.
170 * regs_query_register_name() returns the name of a register from its
171 * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
173 const char *regs_query_register_name(unsigned int offset)
175 const struct pt_regs_offset *roff;
176 for (roff = regoffset_table; roff->name != NULL; roff++)
177 if (roff->offset == offset)
183 * does not yet catch signals sent when the child dies.
184 * in exit.c or in signal.c.
188 * Set of msr bits that gdb can change on behalf of a process.
190 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
191 #define MSR_DEBUGCHANGE 0
193 #define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
197 * Max register writeable via put_reg
200 #define PT_MAX_PUT_REG PT_MQ
202 #define PT_MAX_PUT_REG PT_CCR
205 static unsigned long get_user_msr(struct task_struct *task)
207 return task->thread.regs->msr | task->thread.fpexc_mode;
210 static int set_user_msr(struct task_struct *task, unsigned long msr)
212 task->thread.regs->msr &= ~MSR_DEBUGCHANGE;
213 task->thread.regs->msr |= msr & MSR_DEBUGCHANGE;
217 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
218 static unsigned long get_user_ckpt_msr(struct task_struct *task)
220 return task->thread.ckpt_regs.msr | task->thread.fpexc_mode;
223 static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr)
225 task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE;
226 task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE;
230 static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap)
232 task->thread.ckpt_regs.trap = trap & 0xfff0;
238 static int get_user_dscr(struct task_struct *task, unsigned long *data)
240 *data = task->thread.dscr;
244 static int set_user_dscr(struct task_struct *task, unsigned long dscr)
246 task->thread.dscr = dscr;
247 task->thread.dscr_inherit = 1;
251 static int get_user_dscr(struct task_struct *task, unsigned long *data)
256 static int set_user_dscr(struct task_struct *task, unsigned long dscr)
263 * We prevent mucking around with the reserved area of trap
264 * which are used internally by the kernel.
266 static int set_user_trap(struct task_struct *task, unsigned long trap)
268 task->thread.regs->trap = trap & 0xfff0;
273 * Get contents of register REGNO in task TASK.
275 int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)
277 if ((task->thread.regs == NULL) || !data)
280 if (regno == PT_MSR) {
281 *data = get_user_msr(task);
285 if (regno == PT_DSCR)
286 return get_user_dscr(task, data);
290 * softe copies paca->irq_soft_mask variable state. Since irq_soft_mask is
291 * no more used as a flag, lets force usr to alway see the softe value as 1
292 * which means interrupts are not soft disabled.
294 if (regno == PT_SOFTE) {
300 if (regno < (sizeof(struct user_pt_regs) / sizeof(unsigned long))) {
301 *data = ((unsigned long *)task->thread.regs)[regno];
309 * Write contents of register REGNO in task TASK.
311 int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
313 if (task->thread.regs == NULL)
317 return set_user_msr(task, data);
318 if (regno == PT_TRAP)
319 return set_user_trap(task, data);
320 if (regno == PT_DSCR)
321 return set_user_dscr(task, data);
323 if (regno <= PT_MAX_PUT_REG) {
324 ((unsigned long *)task->thread.regs)[regno] = data;
330 static int gpr_get(struct task_struct *target, const struct user_regset *regset,
331 unsigned int pos, unsigned int count,
332 void *kbuf, void __user *ubuf)
336 if (target->thread.regs == NULL)
339 if (!FULL_REGS(target->thread.regs)) {
340 /* We have a partial register set. Fill 14-31 with bogus values */
341 for (i = 14; i < 32; i++)
342 target->thread.regs->gpr[i] = NV_REG_POISON;
345 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
347 0, offsetof(struct pt_regs, msr));
349 unsigned long msr = get_user_msr(target);
350 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
351 offsetof(struct pt_regs, msr),
352 offsetof(struct pt_regs, msr) +
356 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
357 offsetof(struct pt_regs, msr) + sizeof(long));
360 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
361 &target->thread.regs->orig_gpr3,
362 offsetof(struct pt_regs, orig_gpr3),
363 sizeof(struct user_pt_regs));
365 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
366 sizeof(struct user_pt_regs), -1);
371 static int gpr_set(struct task_struct *target, const struct user_regset *regset,
372 unsigned int pos, unsigned int count,
373 const void *kbuf, const void __user *ubuf)
378 if (target->thread.regs == NULL)
381 CHECK_FULL_REGS(target->thread.regs);
383 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
385 0, PT_MSR * sizeof(reg));
387 if (!ret && count > 0) {
388 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
389 PT_MSR * sizeof(reg),
390 (PT_MSR + 1) * sizeof(reg));
392 ret = set_user_msr(target, reg);
395 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
396 offsetof(struct pt_regs, msr) + sizeof(long));
399 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
400 &target->thread.regs->orig_gpr3,
401 PT_ORIG_R3 * sizeof(reg),
402 (PT_MAX_PUT_REG + 1) * sizeof(reg));
404 if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
405 ret = user_regset_copyin_ignore(
406 &pos, &count, &kbuf, &ubuf,
407 (PT_MAX_PUT_REG + 1) * sizeof(reg),
408 PT_TRAP * sizeof(reg));
410 if (!ret && count > 0) {
411 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
412 PT_TRAP * sizeof(reg),
413 (PT_TRAP + 1) * sizeof(reg));
415 ret = set_user_trap(target, reg);
419 ret = user_regset_copyin_ignore(
420 &pos, &count, &kbuf, &ubuf,
421 (PT_TRAP + 1) * sizeof(reg), -1);
427 * Regardless of transactions, 'fp_state' holds the current running
428 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
429 * value of all FPR registers for the current transaction.
431 * Userspace interface buffer layout:
438 static int fpr_get(struct task_struct *target, const struct user_regset *regset,
439 unsigned int pos, unsigned int count,
440 void *kbuf, void __user *ubuf)
446 flush_fp_to_thread(target);
448 /* copy to local buffer then write that out */
449 for (i = 0; i < 32 ; i++)
450 buf[i] = target->thread.TS_FPR(i);
451 buf[32] = target->thread.fp_state.fpscr;
452 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
454 BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
455 offsetof(struct thread_fp_state, fpr[32]));
457 flush_fp_to_thread(target);
459 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
460 &target->thread.fp_state, 0, -1);
465 * Regardless of transactions, 'fp_state' holds the current running
466 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
467 * value of all FPR registers for the current transaction.
469 * Userspace interface buffer layout:
477 static int fpr_set(struct task_struct *target, const struct user_regset *regset,
478 unsigned int pos, unsigned int count,
479 const void *kbuf, const void __user *ubuf)
485 flush_fp_to_thread(target);
487 for (i = 0; i < 32 ; i++)
488 buf[i] = target->thread.TS_FPR(i);
489 buf[32] = target->thread.fp_state.fpscr;
491 /* copy to local buffer then write that out */
492 i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
496 for (i = 0; i < 32 ; i++)
497 target->thread.TS_FPR(i) = buf[i];
498 target->thread.fp_state.fpscr = buf[32];
501 BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
502 offsetof(struct thread_fp_state, fpr[32]));
504 flush_fp_to_thread(target);
506 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
507 &target->thread.fp_state, 0, -1);
511 #ifdef CONFIG_ALTIVEC
513 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
514 * The transfer totals 34 quadword. Quadwords 0-31 contain the
515 * corresponding vector registers. Quadword 32 contains the vscr as the
516 * last word (offset 12) within that quadword. Quadword 33 contains the
517 * vrsave as the first word (offset 0) within the quadword.
519 * This definition of the VMX state is compatible with the current PPC32
520 * ptrace interface. This allows signal handling and ptrace to use the
521 * same structures. This also simplifies the implementation of a bi-arch
522 * (combined (32- and 64-bit) gdb.
525 static int vr_active(struct task_struct *target,
526 const struct user_regset *regset)
528 flush_altivec_to_thread(target);
529 return target->thread.used_vr ? regset->n : 0;
533 * Regardless of transactions, 'vr_state' holds the current running
534 * value of all the VMX registers and 'ckvr_state' holds the last
535 * checkpointed value of all the VMX registers for the current
536 * transaction to fall back on in case it aborts.
538 * Userspace interface buffer layout:
546 static int vr_get(struct task_struct *target, const struct user_regset *regset,
547 unsigned int pos, unsigned int count,
548 void *kbuf, void __user *ubuf)
552 flush_altivec_to_thread(target);
554 BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
555 offsetof(struct thread_vr_state, vr[32]));
557 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
558 &target->thread.vr_state, 0,
559 33 * sizeof(vector128));
562 * Copy out only the low-order word of vrsave.
568 memset(&vrsave, 0, sizeof(vrsave));
570 vrsave.word = target->thread.vrsave;
572 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
573 33 * sizeof(vector128), -1);
580 * Regardless of transactions, 'vr_state' holds the current running
581 * value of all the VMX registers and 'ckvr_state' holds the last
582 * checkpointed value of all the VMX registers for the current
583 * transaction to fall back on in case it aborts.
585 * Userspace interface buffer layout:
593 static int vr_set(struct task_struct *target, const struct user_regset *regset,
594 unsigned int pos, unsigned int count,
595 const void *kbuf, const void __user *ubuf)
599 flush_altivec_to_thread(target);
601 BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
602 offsetof(struct thread_vr_state, vr[32]));
604 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
605 &target->thread.vr_state, 0,
606 33 * sizeof(vector128));
607 if (!ret && count > 0) {
609 * We use only the first word of vrsave.
615 memset(&vrsave, 0, sizeof(vrsave));
617 vrsave.word = target->thread.vrsave;
619 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
620 33 * sizeof(vector128), -1);
622 target->thread.vrsave = vrsave.word;
627 #endif /* CONFIG_ALTIVEC */
631 * Currently to set and and get all the vsx state, you need to call
632 * the fp and VMX calls as well. This only get/sets the lower 32
633 * 128bit VSX registers.
636 static int vsr_active(struct task_struct *target,
637 const struct user_regset *regset)
639 flush_vsx_to_thread(target);
640 return target->thread.used_vsr ? regset->n : 0;
644 * Regardless of transactions, 'fp_state' holds the current running
645 * value of all FPR registers and 'ckfp_state' holds the last
646 * checkpointed value of all FPR registers for the current
649 * Userspace interface buffer layout:
655 static int vsr_get(struct task_struct *target, const struct user_regset *regset,
656 unsigned int pos, unsigned int count,
657 void *kbuf, void __user *ubuf)
662 flush_tmregs_to_thread(target);
663 flush_fp_to_thread(target);
664 flush_altivec_to_thread(target);
665 flush_vsx_to_thread(target);
667 for (i = 0; i < 32 ; i++)
668 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
670 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
671 buf, 0, 32 * sizeof(double));
677 * Regardless of transactions, 'fp_state' holds the current running
678 * value of all FPR registers and 'ckfp_state' holds the last
679 * checkpointed value of all FPR registers for the current
682 * Userspace interface buffer layout:
688 static int vsr_set(struct task_struct *target, const struct user_regset *regset,
689 unsigned int pos, unsigned int count,
690 const void *kbuf, const void __user *ubuf)
695 flush_tmregs_to_thread(target);
696 flush_fp_to_thread(target);
697 flush_altivec_to_thread(target);
698 flush_vsx_to_thread(target);
700 for (i = 0; i < 32 ; i++)
701 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
703 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
704 buf, 0, 32 * sizeof(double));
706 for (i = 0; i < 32 ; i++)
707 target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
711 #endif /* CONFIG_VSX */
716 * For get_evrregs/set_evrregs functions 'data' has the following layout:
725 static int evr_active(struct task_struct *target,
726 const struct user_regset *regset)
728 flush_spe_to_thread(target);
729 return target->thread.used_spe ? regset->n : 0;
732 static int evr_get(struct task_struct *target, const struct user_regset *regset,
733 unsigned int pos, unsigned int count,
734 void *kbuf, void __user *ubuf)
738 flush_spe_to_thread(target);
740 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
742 0, sizeof(target->thread.evr));
744 BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
745 offsetof(struct thread_struct, spefscr));
748 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
750 sizeof(target->thread.evr), -1);
755 static int evr_set(struct task_struct *target, const struct user_regset *regset,
756 unsigned int pos, unsigned int count,
757 const void *kbuf, const void __user *ubuf)
761 flush_spe_to_thread(target);
763 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
765 0, sizeof(target->thread.evr));
767 BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
768 offsetof(struct thread_struct, spefscr));
771 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
773 sizeof(target->thread.evr), -1);
777 #endif /* CONFIG_SPE */
779 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
781 * tm_cgpr_active - get active number of registers in CGPR
782 * @target: The target task.
783 * @regset: The user regset structure.
785 * This function checks for the active number of available
786 * regisers in transaction checkpointed GPR category.
788 static int tm_cgpr_active(struct task_struct *target,
789 const struct user_regset *regset)
791 if (!cpu_has_feature(CPU_FTR_TM))
794 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
801 * tm_cgpr_get - get CGPR registers
802 * @target: The target task.
803 * @regset: The user regset structure.
804 * @pos: The buffer position.
805 * @count: Number of bytes to copy.
806 * @kbuf: Kernel buffer to copy from.
807 * @ubuf: User buffer to copy into.
809 * This function gets transaction checkpointed GPR registers.
811 * When the transaction is active, 'ckpt_regs' holds all the checkpointed
812 * GPR register values for the current transaction to fall back on if it
813 * aborts in between. This function gets those checkpointed GPR registers.
814 * The userspace interface buffer layout is as follows.
817 * struct pt_regs ckpt_regs;
820 static int tm_cgpr_get(struct task_struct *target,
821 const struct user_regset *regset,
822 unsigned int pos, unsigned int count,
823 void *kbuf, void __user *ubuf)
827 if (!cpu_has_feature(CPU_FTR_TM))
830 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
833 flush_tmregs_to_thread(target);
834 flush_fp_to_thread(target);
835 flush_altivec_to_thread(target);
837 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
838 &target->thread.ckpt_regs,
839 0, offsetof(struct pt_regs, msr));
841 unsigned long msr = get_user_ckpt_msr(target);
843 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
844 offsetof(struct pt_regs, msr),
845 offsetof(struct pt_regs, msr) +
849 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
850 offsetof(struct pt_regs, msr) + sizeof(long));
853 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
854 &target->thread.ckpt_regs.orig_gpr3,
855 offsetof(struct pt_regs, orig_gpr3),
856 sizeof(struct user_pt_regs));
858 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
859 sizeof(struct user_pt_regs), -1);
865 * tm_cgpr_set - set the CGPR registers
866 * @target: The target task.
867 * @regset: The user regset structure.
868 * @pos: The buffer position.
869 * @count: Number of bytes to copy.
870 * @kbuf: Kernel buffer to copy into.
871 * @ubuf: User buffer to copy from.
873 * This function sets in transaction checkpointed GPR registers.
875 * When the transaction is active, 'ckpt_regs' holds the checkpointed
876 * GPR register values for the current transaction to fall back on if it
877 * aborts in between. This function sets those checkpointed GPR registers.
878 * The userspace interface buffer layout is as follows.
881 * struct pt_regs ckpt_regs;
884 static int tm_cgpr_set(struct task_struct *target,
885 const struct user_regset *regset,
886 unsigned int pos, unsigned int count,
887 const void *kbuf, const void __user *ubuf)
892 if (!cpu_has_feature(CPU_FTR_TM))
895 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
898 flush_tmregs_to_thread(target);
899 flush_fp_to_thread(target);
900 flush_altivec_to_thread(target);
902 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
903 &target->thread.ckpt_regs,
904 0, PT_MSR * sizeof(reg));
906 if (!ret && count > 0) {
907 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
908 PT_MSR * sizeof(reg),
909 (PT_MSR + 1) * sizeof(reg));
911 ret = set_user_ckpt_msr(target, reg);
914 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
915 offsetof(struct pt_regs, msr) + sizeof(long));
918 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
919 &target->thread.ckpt_regs.orig_gpr3,
920 PT_ORIG_R3 * sizeof(reg),
921 (PT_MAX_PUT_REG + 1) * sizeof(reg));
923 if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
924 ret = user_regset_copyin_ignore(
925 &pos, &count, &kbuf, &ubuf,
926 (PT_MAX_PUT_REG + 1) * sizeof(reg),
927 PT_TRAP * sizeof(reg));
929 if (!ret && count > 0) {
930 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
931 PT_TRAP * sizeof(reg),
932 (PT_TRAP + 1) * sizeof(reg));
934 ret = set_user_ckpt_trap(target, reg);
938 ret = user_regset_copyin_ignore(
939 &pos, &count, &kbuf, &ubuf,
940 (PT_TRAP + 1) * sizeof(reg), -1);
946 * tm_cfpr_active - get active number of registers in CFPR
947 * @target: The target task.
948 * @regset: The user regset structure.
950 * This function checks for the active number of available
951 * regisers in transaction checkpointed FPR category.
953 static int tm_cfpr_active(struct task_struct *target,
954 const struct user_regset *regset)
956 if (!cpu_has_feature(CPU_FTR_TM))
959 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
966 * tm_cfpr_get - get CFPR registers
967 * @target: The target task.
968 * @regset: The user regset structure.
969 * @pos: The buffer position.
970 * @count: Number of bytes to copy.
971 * @kbuf: Kernel buffer to copy from.
972 * @ubuf: User buffer to copy into.
974 * This function gets in transaction checkpointed FPR registers.
976 * When the transaction is active 'ckfp_state' holds the checkpointed
977 * values for the current transaction to fall back on if it aborts
978 * in between. This function gets those checkpointed FPR registers.
979 * The userspace interface buffer layout is as follows.
986 static int tm_cfpr_get(struct task_struct *target,
987 const struct user_regset *regset,
988 unsigned int pos, unsigned int count,
989 void *kbuf, void __user *ubuf)
994 if (!cpu_has_feature(CPU_FTR_TM))
997 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1000 flush_tmregs_to_thread(target);
1001 flush_fp_to_thread(target);
1002 flush_altivec_to_thread(target);
1004 /* copy to local buffer then write that out */
1005 for (i = 0; i < 32 ; i++)
1006 buf[i] = target->thread.TS_CKFPR(i);
1007 buf[32] = target->thread.ckfp_state.fpscr;
1008 return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
1012 * tm_cfpr_set - set CFPR registers
1013 * @target: The target task.
1014 * @regset: The user regset structure.
1015 * @pos: The buffer position.
1016 * @count: Number of bytes to copy.
1017 * @kbuf: Kernel buffer to copy into.
1018 * @ubuf: User buffer to copy from.
1020 * This function sets in transaction checkpointed FPR registers.
1022 * When the transaction is active 'ckfp_state' holds the checkpointed
1023 * FPR register values for the current transaction to fall back on
1024 * if it aborts in between. This function sets these checkpointed
1025 * FPR registers. The userspace interface buffer layout is as follows.
1032 static int tm_cfpr_set(struct task_struct *target,
1033 const struct user_regset *regset,
1034 unsigned int pos, unsigned int count,
1035 const void *kbuf, const void __user *ubuf)
1040 if (!cpu_has_feature(CPU_FTR_TM))
1043 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1046 flush_tmregs_to_thread(target);
1047 flush_fp_to_thread(target);
1048 flush_altivec_to_thread(target);
1050 for (i = 0; i < 32; i++)
1051 buf[i] = target->thread.TS_CKFPR(i);
1052 buf[32] = target->thread.ckfp_state.fpscr;
1054 /* copy to local buffer then write that out */
1055 i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
1058 for (i = 0; i < 32 ; i++)
1059 target->thread.TS_CKFPR(i) = buf[i];
1060 target->thread.ckfp_state.fpscr = buf[32];
1065 * tm_cvmx_active - get active number of registers in CVMX
1066 * @target: The target task.
1067 * @regset: The user regset structure.
1069 * This function checks for the active number of available
1070 * regisers in checkpointed VMX category.
1072 static int tm_cvmx_active(struct task_struct *target,
1073 const struct user_regset *regset)
1075 if (!cpu_has_feature(CPU_FTR_TM))
1078 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1085 * tm_cvmx_get - get CMVX registers
1086 * @target: The target task.
1087 * @regset: The user regset structure.
1088 * @pos: The buffer position.
1089 * @count: Number of bytes to copy.
1090 * @kbuf: Kernel buffer to copy from.
1091 * @ubuf: User buffer to copy into.
1093 * This function gets in transaction checkpointed VMX registers.
1095 * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
1096 * the checkpointed values for the current transaction to fall
1097 * back on if it aborts in between. The userspace interface buffer
1098 * layout is as follows.
1106 static int tm_cvmx_get(struct task_struct *target,
1107 const struct user_regset *regset,
1108 unsigned int pos, unsigned int count,
1109 void *kbuf, void __user *ubuf)
1113 BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
1115 if (!cpu_has_feature(CPU_FTR_TM))
1118 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1121 /* Flush the state */
1122 flush_tmregs_to_thread(target);
1123 flush_fp_to_thread(target);
1124 flush_altivec_to_thread(target);
1126 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1127 &target->thread.ckvr_state, 0,
1128 33 * sizeof(vector128));
1131 * Copy out only the low-order word of vrsave.
1137 memset(&vrsave, 0, sizeof(vrsave));
1138 vrsave.word = target->thread.ckvrsave;
1139 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
1140 33 * sizeof(vector128), -1);
1147 * tm_cvmx_set - set CMVX registers
1148 * @target: The target task.
1149 * @regset: The user regset structure.
1150 * @pos: The buffer position.
1151 * @count: Number of bytes to copy.
1152 * @kbuf: Kernel buffer to copy into.
1153 * @ubuf: User buffer to copy from.
1155 * This function sets in transaction checkpointed VMX registers.
1157 * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
1158 * the checkpointed values for the current transaction to fall
1159 * back on if it aborts in between. The userspace interface buffer
1160 * layout is as follows.
1168 static int tm_cvmx_set(struct task_struct *target,
1169 const struct user_regset *regset,
1170 unsigned int pos, unsigned int count,
1171 const void *kbuf, const void __user *ubuf)
1175 BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
1177 if (!cpu_has_feature(CPU_FTR_TM))
1180 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1183 flush_tmregs_to_thread(target);
1184 flush_fp_to_thread(target);
1185 flush_altivec_to_thread(target);
1187 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1188 &target->thread.ckvr_state, 0,
1189 33 * sizeof(vector128));
1190 if (!ret && count > 0) {
1192 * We use only the low-order word of vrsave.
1198 memset(&vrsave, 0, sizeof(vrsave));
1199 vrsave.word = target->thread.ckvrsave;
1200 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
1201 33 * sizeof(vector128), -1);
1203 target->thread.ckvrsave = vrsave.word;
1210 * tm_cvsx_active - get active number of registers in CVSX
1211 * @target: The target task.
1212 * @regset: The user regset structure.
1214 * This function checks for the active number of available
1215 * regisers in transaction checkpointed VSX category.
1217 static int tm_cvsx_active(struct task_struct *target,
1218 const struct user_regset *regset)
1220 if (!cpu_has_feature(CPU_FTR_TM))
1223 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1226 flush_vsx_to_thread(target);
1227 return target->thread.used_vsr ? regset->n : 0;
1231 * tm_cvsx_get - get CVSX registers
1232 * @target: The target task.
1233 * @regset: The user regset structure.
1234 * @pos: The buffer position.
1235 * @count: Number of bytes to copy.
1236 * @kbuf: Kernel buffer to copy from.
1237 * @ubuf: User buffer to copy into.
1239 * This function gets in transaction checkpointed VSX registers.
1241 * When the transaction is active 'ckfp_state' holds the checkpointed
1242 * values for the current transaction to fall back on if it aborts
1243 * in between. This function gets those checkpointed VSX registers.
1244 * The userspace interface buffer layout is as follows.
1250 static int tm_cvsx_get(struct task_struct *target,
1251 const struct user_regset *regset,
1252 unsigned int pos, unsigned int count,
1253 void *kbuf, void __user *ubuf)
1258 if (!cpu_has_feature(CPU_FTR_TM))
1261 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1264 /* Flush the state */
1265 flush_tmregs_to_thread(target);
1266 flush_fp_to_thread(target);
1267 flush_altivec_to_thread(target);
1268 flush_vsx_to_thread(target);
1270 for (i = 0; i < 32 ; i++)
1271 buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
1272 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1273 buf, 0, 32 * sizeof(double));
1279 * tm_cvsx_set - set CFPR registers
1280 * @target: The target task.
1281 * @regset: The user regset structure.
1282 * @pos: The buffer position.
1283 * @count: Number of bytes to copy.
1284 * @kbuf: Kernel buffer to copy into.
1285 * @ubuf: User buffer to copy from.
1287 * This function sets in transaction checkpointed VSX registers.
1289 * When the transaction is active 'ckfp_state' holds the checkpointed
1290 * VSX register values for the current transaction to fall back on
1291 * if it aborts in between. This function sets these checkpointed
1292 * FPR registers. The userspace interface buffer layout is as follows.
1298 static int tm_cvsx_set(struct task_struct *target,
1299 const struct user_regset *regset,
1300 unsigned int pos, unsigned int count,
1301 const void *kbuf, const void __user *ubuf)
1306 if (!cpu_has_feature(CPU_FTR_TM))
1309 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1312 /* Flush the state */
1313 flush_tmregs_to_thread(target);
1314 flush_fp_to_thread(target);
1315 flush_altivec_to_thread(target);
1316 flush_vsx_to_thread(target);
1318 for (i = 0; i < 32 ; i++)
1319 buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
1321 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1322 buf, 0, 32 * sizeof(double));
1324 for (i = 0; i < 32 ; i++)
1325 target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
1331 * tm_spr_active - get active number of registers in TM SPR
1332 * @target: The target task.
1333 * @regset: The user regset structure.
1335 * This function checks the active number of available
1336 * regisers in the transactional memory SPR category.
1338 static int tm_spr_active(struct task_struct *target,
1339 const struct user_regset *regset)
1341 if (!cpu_has_feature(CPU_FTR_TM))
1348 * tm_spr_get - get the TM related SPR registers
1349 * @target: The target task.
1350 * @regset: The user regset structure.
1351 * @pos: The buffer position.
1352 * @count: Number of bytes to copy.
1353 * @kbuf: Kernel buffer to copy from.
1354 * @ubuf: User buffer to copy into.
1356 * This function gets transactional memory related SPR registers.
1357 * The userspace interface buffer layout is as follows.
1365 static int tm_spr_get(struct task_struct *target,
1366 const struct user_regset *regset,
1367 unsigned int pos, unsigned int count,
1368 void *kbuf, void __user *ubuf)
1373 BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
1374 BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
1375 BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
1377 if (!cpu_has_feature(CPU_FTR_TM))
1380 /* Flush the states */
1381 flush_tmregs_to_thread(target);
1382 flush_fp_to_thread(target);
1383 flush_altivec_to_thread(target);
1385 /* TFHAR register */
1386 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1387 &target->thread.tm_tfhar, 0, sizeof(u64));
1389 /* TEXASR register */
1391 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1392 &target->thread.tm_texasr, sizeof(u64),
1395 /* TFIAR register */
1397 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1398 &target->thread.tm_tfiar,
1399 2 * sizeof(u64), 3 * sizeof(u64));
1404 * tm_spr_set - set the TM related SPR registers
1405 * @target: The target task.
1406 * @regset: The user regset structure.
1407 * @pos: The buffer position.
1408 * @count: Number of bytes to copy.
1409 * @kbuf: Kernel buffer to copy into.
1410 * @ubuf: User buffer to copy from.
1412 * This function sets transactional memory related SPR registers.
1413 * The userspace interface buffer layout is as follows.
1421 static int tm_spr_set(struct task_struct *target,
1422 const struct user_regset *regset,
1423 unsigned int pos, unsigned int count,
1424 const void *kbuf, const void __user *ubuf)
1429 BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
1430 BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
1431 BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
1433 if (!cpu_has_feature(CPU_FTR_TM))
1436 /* Flush the states */
1437 flush_tmregs_to_thread(target);
1438 flush_fp_to_thread(target);
1439 flush_altivec_to_thread(target);
1441 /* TFHAR register */
1442 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1443 &target->thread.tm_tfhar, 0, sizeof(u64));
1445 /* TEXASR register */
1447 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1448 &target->thread.tm_texasr, sizeof(u64),
1451 /* TFIAR register */
1453 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1454 &target->thread.tm_tfiar,
1455 2 * sizeof(u64), 3 * sizeof(u64));
1459 static int tm_tar_active(struct task_struct *target,
1460 const struct user_regset *regset)
1462 if (!cpu_has_feature(CPU_FTR_TM))
1465 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1471 static int tm_tar_get(struct task_struct *target,
1472 const struct user_regset *regset,
1473 unsigned int pos, unsigned int count,
1474 void *kbuf, void __user *ubuf)
1478 if (!cpu_has_feature(CPU_FTR_TM))
1481 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1484 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1485 &target->thread.tm_tar, 0, sizeof(u64));
1489 static int tm_tar_set(struct task_struct *target,
1490 const struct user_regset *regset,
1491 unsigned int pos, unsigned int count,
1492 const void *kbuf, const void __user *ubuf)
1496 if (!cpu_has_feature(CPU_FTR_TM))
1499 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1502 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1503 &target->thread.tm_tar, 0, sizeof(u64));
1507 static int tm_ppr_active(struct task_struct *target,
1508 const struct user_regset *regset)
1510 if (!cpu_has_feature(CPU_FTR_TM))
1513 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1520 static int tm_ppr_get(struct task_struct *target,
1521 const struct user_regset *regset,
1522 unsigned int pos, unsigned int count,
1523 void *kbuf, void __user *ubuf)
1527 if (!cpu_has_feature(CPU_FTR_TM))
1530 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1533 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1534 &target->thread.tm_ppr, 0, sizeof(u64));
1538 static int tm_ppr_set(struct task_struct *target,
1539 const struct user_regset *regset,
1540 unsigned int pos, unsigned int count,
1541 const void *kbuf, const void __user *ubuf)
1545 if (!cpu_has_feature(CPU_FTR_TM))
1548 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1551 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1552 &target->thread.tm_ppr, 0, sizeof(u64));
1556 static int tm_dscr_active(struct task_struct *target,
1557 const struct user_regset *regset)
1559 if (!cpu_has_feature(CPU_FTR_TM))
1562 if (MSR_TM_ACTIVE(target->thread.regs->msr))
1568 static int tm_dscr_get(struct task_struct *target,
1569 const struct user_regset *regset,
1570 unsigned int pos, unsigned int count,
1571 void *kbuf, void __user *ubuf)
1575 if (!cpu_has_feature(CPU_FTR_TM))
1578 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1581 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1582 &target->thread.tm_dscr, 0, sizeof(u64));
1586 static int tm_dscr_set(struct task_struct *target,
1587 const struct user_regset *regset,
1588 unsigned int pos, unsigned int count,
1589 const void *kbuf, const void __user *ubuf)
1593 if (!cpu_has_feature(CPU_FTR_TM))
1596 if (!MSR_TM_ACTIVE(target->thread.regs->msr))
1599 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1600 &target->thread.tm_dscr, 0, sizeof(u64));
1603 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
1606 static int ppr_get(struct task_struct *target,
1607 const struct user_regset *regset,
1608 unsigned int pos, unsigned int count,
1609 void *kbuf, void __user *ubuf)
1611 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1612 &target->thread.regs->ppr, 0, sizeof(u64));
1615 static int ppr_set(struct task_struct *target,
1616 const struct user_regset *regset,
1617 unsigned int pos, unsigned int count,
1618 const void *kbuf, const void __user *ubuf)
1620 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1621 &target->thread.regs->ppr, 0, sizeof(u64));
1624 static int dscr_get(struct task_struct *target,
1625 const struct user_regset *regset,
1626 unsigned int pos, unsigned int count,
1627 void *kbuf, void __user *ubuf)
1629 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1630 &target->thread.dscr, 0, sizeof(u64));
1632 static int dscr_set(struct task_struct *target,
1633 const struct user_regset *regset,
1634 unsigned int pos, unsigned int count,
1635 const void *kbuf, const void __user *ubuf)
1637 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1638 &target->thread.dscr, 0, sizeof(u64));
1641 #ifdef CONFIG_PPC_BOOK3S_64
1642 static int tar_get(struct task_struct *target,
1643 const struct user_regset *regset,
1644 unsigned int pos, unsigned int count,
1645 void *kbuf, void __user *ubuf)
1647 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1648 &target->thread.tar, 0, sizeof(u64));
1650 static int tar_set(struct task_struct *target,
1651 const struct user_regset *regset,
1652 unsigned int pos, unsigned int count,
1653 const void *kbuf, const void __user *ubuf)
1655 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1656 &target->thread.tar, 0, sizeof(u64));
1659 static int ebb_active(struct task_struct *target,
1660 const struct user_regset *regset)
1662 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1665 if (target->thread.used_ebb)
1671 static int ebb_get(struct task_struct *target,
1672 const struct user_regset *regset,
1673 unsigned int pos, unsigned int count,
1674 void *kbuf, void __user *ubuf)
1677 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
1678 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
1680 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1683 if (!target->thread.used_ebb)
1686 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1687 &target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
1690 static int ebb_set(struct task_struct *target,
1691 const struct user_regset *regset,
1692 unsigned int pos, unsigned int count,
1693 const void *kbuf, const void __user *ubuf)
1698 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
1699 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
1701 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1704 if (target->thread.used_ebb)
1707 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1708 &target->thread.ebbrr, 0, sizeof(unsigned long));
1711 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1712 &target->thread.ebbhr, sizeof(unsigned long),
1713 2 * sizeof(unsigned long));
1716 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1717 &target->thread.bescr,
1718 2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
1722 static int pmu_active(struct task_struct *target,
1723 const struct user_regset *regset)
1725 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1731 static int pmu_get(struct task_struct *target,
1732 const struct user_regset *regset,
1733 unsigned int pos, unsigned int count,
1734 void *kbuf, void __user *ubuf)
1737 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
1738 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
1739 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
1740 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
1742 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1745 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1746 &target->thread.siar, 0,
1747 5 * sizeof(unsigned long));
1750 static int pmu_set(struct task_struct *target,
1751 const struct user_regset *regset,
1752 unsigned int pos, unsigned int count,
1753 const void *kbuf, const void __user *ubuf)
1758 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
1759 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
1760 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
1761 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
1763 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
1766 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1767 &target->thread.siar, 0,
1768 sizeof(unsigned long));
1771 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1772 &target->thread.sdar, sizeof(unsigned long),
1773 2 * sizeof(unsigned long));
1776 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1777 &target->thread.sier, 2 * sizeof(unsigned long),
1778 3 * sizeof(unsigned long));
1781 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1782 &target->thread.mmcr2, 3 * sizeof(unsigned long),
1783 4 * sizeof(unsigned long));
1786 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1787 &target->thread.mmcr0, 4 * sizeof(unsigned long),
1788 5 * sizeof(unsigned long));
1793 #ifdef CONFIG_PPC_MEM_KEYS
1794 static int pkey_active(struct task_struct *target,
1795 const struct user_regset *regset)
1797 if (!arch_pkeys_enabled())
1803 static int pkey_get(struct task_struct *target,
1804 const struct user_regset *regset,
1805 unsigned int pos, unsigned int count,
1806 void *kbuf, void __user *ubuf)
1808 BUILD_BUG_ON(TSO(amr) + sizeof(unsigned long) != TSO(iamr));
1809 BUILD_BUG_ON(TSO(iamr) + sizeof(unsigned long) != TSO(uamor));
1811 if (!arch_pkeys_enabled())
1814 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
1815 &target->thread.amr, 0,
1816 ELF_NPKEY * sizeof(unsigned long));
1819 static int pkey_set(struct task_struct *target,
1820 const struct user_regset *regset,
1821 unsigned int pos, unsigned int count,
1822 const void *kbuf, const void __user *ubuf)
1827 if (!arch_pkeys_enabled())
1830 /* Only the AMR can be set from userspace */
1831 if (pos != 0 || count != sizeof(new_amr))
1834 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
1835 &new_amr, 0, sizeof(new_amr));
1839 /* UAMOR determines which bits of the AMR can be set from userspace. */
1840 target->thread.amr = (new_amr & target->thread.uamor) |
1841 (target->thread.amr & ~target->thread.uamor);
1845 #endif /* CONFIG_PPC_MEM_KEYS */
1848 * These are our native regset flavors.
1850 enum powerpc_regset {
1853 #ifdef CONFIG_ALTIVEC
1862 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1863 REGSET_TM_CGPR, /* TM checkpointed GPR registers */
1864 REGSET_TM_CFPR, /* TM checkpointed FPR registers */
1865 REGSET_TM_CVMX, /* TM checkpointed VMX registers */
1866 REGSET_TM_CVSX, /* TM checkpointed VSX registers */
1867 REGSET_TM_SPR, /* TM specific SPR registers */
1868 REGSET_TM_CTAR, /* TM checkpointed TAR register */
1869 REGSET_TM_CPPR, /* TM checkpointed PPR register */
1870 REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
1873 REGSET_PPR, /* PPR register */
1874 REGSET_DSCR, /* DSCR register */
1876 #ifdef CONFIG_PPC_BOOK3S_64
1877 REGSET_TAR, /* TAR register */
1878 REGSET_EBB, /* EBB registers */
1879 REGSET_PMR, /* Performance Monitor Registers */
1881 #ifdef CONFIG_PPC_MEM_KEYS
1882 REGSET_PKEY, /* AMR register */
1886 static const struct user_regset native_regsets[] = {
1888 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
1889 .size = sizeof(long), .align = sizeof(long),
1890 .get = gpr_get, .set = gpr_set
1893 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
1894 .size = sizeof(double), .align = sizeof(double),
1895 .get = fpr_get, .set = fpr_set
1897 #ifdef CONFIG_ALTIVEC
1899 .core_note_type = NT_PPC_VMX, .n = 34,
1900 .size = sizeof(vector128), .align = sizeof(vector128),
1901 .active = vr_active, .get = vr_get, .set = vr_set
1906 .core_note_type = NT_PPC_VSX, .n = 32,
1907 .size = sizeof(double), .align = sizeof(double),
1908 .active = vsr_active, .get = vsr_get, .set = vsr_set
1913 .core_note_type = NT_PPC_SPE, .n = 35,
1914 .size = sizeof(u32), .align = sizeof(u32),
1915 .active = evr_active, .get = evr_get, .set = evr_set
1918 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1919 [REGSET_TM_CGPR] = {
1920 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
1921 .size = sizeof(long), .align = sizeof(long),
1922 .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
1924 [REGSET_TM_CFPR] = {
1925 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
1926 .size = sizeof(double), .align = sizeof(double),
1927 .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
1929 [REGSET_TM_CVMX] = {
1930 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
1931 .size = sizeof(vector128), .align = sizeof(vector128),
1932 .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
1934 [REGSET_TM_CVSX] = {
1935 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
1936 .size = sizeof(double), .align = sizeof(double),
1937 .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
1940 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
1941 .size = sizeof(u64), .align = sizeof(u64),
1942 .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
1944 [REGSET_TM_CTAR] = {
1945 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
1946 .size = sizeof(u64), .align = sizeof(u64),
1947 .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
1949 [REGSET_TM_CPPR] = {
1950 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
1951 .size = sizeof(u64), .align = sizeof(u64),
1952 .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
1954 [REGSET_TM_CDSCR] = {
1955 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
1956 .size = sizeof(u64), .align = sizeof(u64),
1957 .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
1962 .core_note_type = NT_PPC_PPR, .n = 1,
1963 .size = sizeof(u64), .align = sizeof(u64),
1964 .get = ppr_get, .set = ppr_set
1967 .core_note_type = NT_PPC_DSCR, .n = 1,
1968 .size = sizeof(u64), .align = sizeof(u64),
1969 .get = dscr_get, .set = dscr_set
1972 #ifdef CONFIG_PPC_BOOK3S_64
1974 .core_note_type = NT_PPC_TAR, .n = 1,
1975 .size = sizeof(u64), .align = sizeof(u64),
1976 .get = tar_get, .set = tar_set
1979 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
1980 .size = sizeof(u64), .align = sizeof(u64),
1981 .active = ebb_active, .get = ebb_get, .set = ebb_set
1984 .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
1985 .size = sizeof(u64), .align = sizeof(u64),
1986 .active = pmu_active, .get = pmu_get, .set = pmu_set
1989 #ifdef CONFIG_PPC_MEM_KEYS
1991 .core_note_type = NT_PPC_PKEY, .n = ELF_NPKEY,
1992 .size = sizeof(u64), .align = sizeof(u64),
1993 .active = pkey_active, .get = pkey_get, .set = pkey_set
1998 static const struct user_regset_view user_ppc_native_view = {
1999 .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
2000 .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
2004 #include <linux/compat.h>
2006 static int gpr32_get_common(struct task_struct *target,
2007 const struct user_regset *regset,
2008 unsigned int pos, unsigned int count,
2009 void *kbuf, void __user *ubuf,
2010 unsigned long *regs)
2012 compat_ulong_t *k = kbuf;
2013 compat_ulong_t __user *u = ubuf;
2017 count /= sizeof(reg);
2020 for (; count > 0 && pos < PT_MSR; --count)
2023 for (; count > 0 && pos < PT_MSR; --count)
2024 if (__put_user((compat_ulong_t) regs[pos++], u++))
2027 if (count > 0 && pos == PT_MSR) {
2028 reg = get_user_msr(target);
2031 else if (__put_user(reg, u++))
2038 for (; count > 0 && pos < PT_REGS_COUNT; --count)
2041 for (; count > 0 && pos < PT_REGS_COUNT; --count)
2042 if (__put_user((compat_ulong_t) regs[pos++], u++))
2048 count *= sizeof(reg);
2049 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
2050 PT_REGS_COUNT * sizeof(reg), -1);
2053 static int gpr32_set_common(struct task_struct *target,
2054 const struct user_regset *regset,
2055 unsigned int pos, unsigned int count,
2056 const void *kbuf, const void __user *ubuf,
2057 unsigned long *regs)
2059 const compat_ulong_t *k = kbuf;
2060 const compat_ulong_t __user *u = ubuf;
2064 count /= sizeof(reg);
2067 for (; count > 0 && pos < PT_MSR; --count)
2070 for (; count > 0 && pos < PT_MSR; --count) {
2071 if (__get_user(reg, u++))
2077 if (count > 0 && pos == PT_MSR) {
2080 else if (__get_user(reg, u++))
2082 set_user_msr(target, reg);
2088 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
2090 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
2093 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
2094 if (__get_user(reg, u++))
2098 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
2099 if (__get_user(reg, u++))
2103 if (count > 0 && pos == PT_TRAP) {
2106 else if (__get_user(reg, u++))
2108 set_user_trap(target, reg);
2116 count *= sizeof(reg);
2117 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
2118 (PT_TRAP + 1) * sizeof(reg), -1);
2121 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2122 static int tm_cgpr32_get(struct task_struct *target,
2123 const struct user_regset *regset,
2124 unsigned int pos, unsigned int count,
2125 void *kbuf, void __user *ubuf)
2127 return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
2128 &target->thread.ckpt_regs.gpr[0]);
2131 static int tm_cgpr32_set(struct task_struct *target,
2132 const struct user_regset *regset,
2133 unsigned int pos, unsigned int count,
2134 const void *kbuf, const void __user *ubuf)
2136 return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
2137 &target->thread.ckpt_regs.gpr[0]);
2139 #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
2141 static int gpr32_get(struct task_struct *target,
2142 const struct user_regset *regset,
2143 unsigned int pos, unsigned int count,
2144 void *kbuf, void __user *ubuf)
2148 if (target->thread.regs == NULL)
2151 if (!FULL_REGS(target->thread.regs)) {
2153 * We have a partial register set.
2154 * Fill 14-31 with bogus values.
2156 for (i = 14; i < 32; i++)
2157 target->thread.regs->gpr[i] = NV_REG_POISON;
2159 return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
2160 &target->thread.regs->gpr[0]);
2163 static int gpr32_set(struct task_struct *target,
2164 const struct user_regset *regset,
2165 unsigned int pos, unsigned int count,
2166 const void *kbuf, const void __user *ubuf)
2168 if (target->thread.regs == NULL)
2171 CHECK_FULL_REGS(target->thread.regs);
2172 return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
2173 &target->thread.regs->gpr[0]);
2177 * These are the regset flavors matching the CONFIG_PPC32 native set.
2179 static const struct user_regset compat_regsets[] = {
2181 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
2182 .size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
2183 .get = gpr32_get, .set = gpr32_set
2186 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
2187 .size = sizeof(double), .align = sizeof(double),
2188 .get = fpr_get, .set = fpr_set
2190 #ifdef CONFIG_ALTIVEC
2192 .core_note_type = NT_PPC_VMX, .n = 34,
2193 .size = sizeof(vector128), .align = sizeof(vector128),
2194 .active = vr_active, .get = vr_get, .set = vr_set
2199 .core_note_type = NT_PPC_SPE, .n = 35,
2200 .size = sizeof(u32), .align = sizeof(u32),
2201 .active = evr_active, .get = evr_get, .set = evr_set
2204 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2205 [REGSET_TM_CGPR] = {
2206 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
2207 .size = sizeof(long), .align = sizeof(long),
2208 .active = tm_cgpr_active,
2209 .get = tm_cgpr32_get, .set = tm_cgpr32_set
2211 [REGSET_TM_CFPR] = {
2212 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
2213 .size = sizeof(double), .align = sizeof(double),
2214 .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
2216 [REGSET_TM_CVMX] = {
2217 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
2218 .size = sizeof(vector128), .align = sizeof(vector128),
2219 .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
2221 [REGSET_TM_CVSX] = {
2222 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
2223 .size = sizeof(double), .align = sizeof(double),
2224 .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
2227 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
2228 .size = sizeof(u64), .align = sizeof(u64),
2229 .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
2231 [REGSET_TM_CTAR] = {
2232 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
2233 .size = sizeof(u64), .align = sizeof(u64),
2234 .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
2236 [REGSET_TM_CPPR] = {
2237 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
2238 .size = sizeof(u64), .align = sizeof(u64),
2239 .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
2241 [REGSET_TM_CDSCR] = {
2242 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
2243 .size = sizeof(u64), .align = sizeof(u64),
2244 .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
2249 .core_note_type = NT_PPC_PPR, .n = 1,
2250 .size = sizeof(u64), .align = sizeof(u64),
2251 .get = ppr_get, .set = ppr_set
2254 .core_note_type = NT_PPC_DSCR, .n = 1,
2255 .size = sizeof(u64), .align = sizeof(u64),
2256 .get = dscr_get, .set = dscr_set
2259 #ifdef CONFIG_PPC_BOOK3S_64
2261 .core_note_type = NT_PPC_TAR, .n = 1,
2262 .size = sizeof(u64), .align = sizeof(u64),
2263 .get = tar_get, .set = tar_set
2266 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
2267 .size = sizeof(u64), .align = sizeof(u64),
2268 .active = ebb_active, .get = ebb_get, .set = ebb_set
2273 static const struct user_regset_view user_ppc_compat_view = {
2274 .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI,
2275 .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets)
2277 #endif /* CONFIG_PPC64 */
2279 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
2282 if (test_tsk_thread_flag(task, TIF_32BIT))
2283 return &user_ppc_compat_view;
2285 return &user_ppc_native_view;
2289 void user_enable_single_step(struct task_struct *task)
2291 struct pt_regs *regs = task->thread.regs;
2294 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2295 task->thread.debug.dbcr0 &= ~DBCR0_BT;
2296 task->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2297 regs->msr |= MSR_DE;
2299 regs->msr &= ~MSR_BE;
2300 regs->msr |= MSR_SE;
2303 set_tsk_thread_flag(task, TIF_SINGLESTEP);
2306 void user_enable_block_step(struct task_struct *task)
2308 struct pt_regs *regs = task->thread.regs;
2311 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2312 task->thread.debug.dbcr0 &= ~DBCR0_IC;
2313 task->thread.debug.dbcr0 = DBCR0_IDM | DBCR0_BT;
2314 regs->msr |= MSR_DE;
2316 regs->msr &= ~MSR_SE;
2317 regs->msr |= MSR_BE;
2320 set_tsk_thread_flag(task, TIF_SINGLESTEP);
2323 void user_disable_single_step(struct task_struct *task)
2325 struct pt_regs *regs = task->thread.regs;
2328 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2330 * The logic to disable single stepping should be as
2331 * simple as turning off the Instruction Complete flag.
2332 * And, after doing so, if all debug flags are off, turn
2333 * off DBCR0(IDM) and MSR(DE) .... Torez
2335 task->thread.debug.dbcr0 &= ~(DBCR0_IC|DBCR0_BT);
2337 * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.
2339 if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
2340 task->thread.debug.dbcr1)) {
2342 * All debug events were off.....
2344 task->thread.debug.dbcr0 &= ~DBCR0_IDM;
2345 regs->msr &= ~MSR_DE;
2348 regs->msr &= ~(MSR_SE | MSR_BE);
2351 clear_tsk_thread_flag(task, TIF_SINGLESTEP);
2354 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2355 void ptrace_triggered(struct perf_event *bp,
2356 struct perf_sample_data *data, struct pt_regs *regs)
2358 struct perf_event_attr attr;
2361 * Disable the breakpoint request here since ptrace has defined a
2362 * one-shot behaviour for breakpoint exceptions in PPC64.
2363 * The SIGTRAP signal is generated automatically for us in do_dabr().
2364 * We don't have to do anything about that here
2367 attr.disabled = true;
2368 modify_user_hw_breakpoint(bp, &attr);
2370 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2372 static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
2375 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2377 struct thread_struct *thread = &(task->thread);
2378 struct perf_event *bp;
2379 struct perf_event_attr attr;
2380 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2381 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2383 struct arch_hw_breakpoint hw_brk;
2386 /* For ppc64 we support one DABR and no IABR's at the moment (ppc64).
2387 * For embedded processors we support one DAC and no IAC's at the
2393 /* The bottom 3 bits in dabr are flags */
2394 if ((data & ~0x7UL) >= TASK_SIZE)
2397 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2398 /* For processors using DABR (i.e. 970), the bottom 3 bits are flags.
2399 * It was assumed, on previous implementations, that 3 bits were
2400 * passed together with the data address, fitting the design of the
2401 * DABR register, as follows:
2405 * bit 2: Breakpoint translation
2407 * Thus, we use them here as so.
2410 /* Ensure breakpoint translation bit is set */
2411 if (data && !(data & HW_BRK_TYPE_TRANSLATE))
2413 hw_brk.address = data & (~HW_BRK_TYPE_DABR);
2414 hw_brk.type = (data & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
2416 set_bp = (data) && (hw_brk.type & HW_BRK_TYPE_RDWR);
2417 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2418 bp = thread->ptrace_bps[0];
2421 unregister_hw_breakpoint(bp);
2422 thread->ptrace_bps[0] = NULL;
2428 attr.bp_addr = hw_brk.address;
2429 arch_bp_generic_fields(hw_brk.type, &attr.bp_type);
2431 /* Enable breakpoint */
2432 attr.disabled = false;
2434 ret = modify_user_hw_breakpoint(bp, &attr);
2438 thread->ptrace_bps[0] = bp;
2439 thread->hw_brk = hw_brk;
2443 /* Create a new breakpoint request if one doesn't exist already */
2444 hw_breakpoint_init(&attr);
2445 attr.bp_addr = hw_brk.address;
2447 arch_bp_generic_fields(hw_brk.type,
2450 thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
2451 ptrace_triggered, NULL, task);
2453 thread->ptrace_bps[0] = NULL;
2457 #else /* !CONFIG_HAVE_HW_BREAKPOINT */
2458 if (set_bp && (!ppc_breakpoint_available()))
2460 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2461 task->thread.hw_brk = hw_brk;
2462 #else /* CONFIG_PPC_ADV_DEBUG_REGS */
2463 /* As described above, it was assumed 3 bits were passed with the data
2464 * address, but we will assume only the mode bits will be passed
2465 * as to not cause alignment restrictions for DAC-based processors.
2468 /* DAC's hold the whole address without any mode flags */
2469 task->thread.debug.dac1 = data & ~0x3UL;
2471 if (task->thread.debug.dac1 == 0) {
2472 dbcr_dac(task) &= ~(DBCR_DAC1R | DBCR_DAC1W);
2473 if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
2474 task->thread.debug.dbcr1)) {
2475 task->thread.regs->msr &= ~MSR_DE;
2476 task->thread.debug.dbcr0 &= ~DBCR0_IDM;
2481 /* Read or Write bits must be set */
2483 if (!(data & 0x3UL))
2486 /* Set the Internal Debugging flag (IDM bit 1) for the DBCR0
2488 task->thread.debug.dbcr0 |= DBCR0_IDM;
2490 /* Check for write and read flags and set DBCR0
2492 dbcr_dac(task) &= ~(DBCR_DAC1R|DBCR_DAC1W);
2494 dbcr_dac(task) |= DBCR_DAC1R;
2496 dbcr_dac(task) |= DBCR_DAC1W;
2497 task->thread.regs->msr |= MSR_DE;
2498 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
2503 * Called by kernel/ptrace.c when detaching..
2505 * Make sure single step bits etc are not set.
2507 void ptrace_disable(struct task_struct *child)
2509 /* make sure the single step bit is not set. */
2510 user_disable_single_step(child);
2511 clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
2514 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2515 static long set_instruction_bp(struct task_struct *child,
2516 struct ppc_hw_breakpoint *bp_info)
2519 int slot1_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC1) != 0);
2520 int slot2_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC2) != 0);
2521 int slot3_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC3) != 0);
2522 int slot4_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC4) != 0);
2524 if (dbcr_iac_range(child) & DBCR_IAC12MODE)
2526 if (dbcr_iac_range(child) & DBCR_IAC34MODE)
2529 if (bp_info->addr >= TASK_SIZE)
2532 if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT) {
2534 /* Make sure range is valid. */
2535 if (bp_info->addr2 >= TASK_SIZE)
2538 /* We need a pair of IAC regsisters */
2539 if ((!slot1_in_use) && (!slot2_in_use)) {
2541 child->thread.debug.iac1 = bp_info->addr;
2542 child->thread.debug.iac2 = bp_info->addr2;
2543 child->thread.debug.dbcr0 |= DBCR0_IAC1;
2544 if (bp_info->addr_mode ==
2545 PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2546 dbcr_iac_range(child) |= DBCR_IAC12X;
2548 dbcr_iac_range(child) |= DBCR_IAC12I;
2549 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2550 } else if ((!slot3_in_use) && (!slot4_in_use)) {
2552 child->thread.debug.iac3 = bp_info->addr;
2553 child->thread.debug.iac4 = bp_info->addr2;
2554 child->thread.debug.dbcr0 |= DBCR0_IAC3;
2555 if (bp_info->addr_mode ==
2556 PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2557 dbcr_iac_range(child) |= DBCR_IAC34X;
2559 dbcr_iac_range(child) |= DBCR_IAC34I;
2564 /* We only need one. If possible leave a pair free in
2565 * case a range is needed later
2567 if (!slot1_in_use) {
2569 * Don't use iac1 if iac1-iac2 are free and either
2570 * iac3 or iac4 (but not both) are free
2572 if (slot2_in_use || (slot3_in_use == slot4_in_use)) {
2574 child->thread.debug.iac1 = bp_info->addr;
2575 child->thread.debug.dbcr0 |= DBCR0_IAC1;
2579 if (!slot2_in_use) {
2581 child->thread.debug.iac2 = bp_info->addr;
2582 child->thread.debug.dbcr0 |= DBCR0_IAC2;
2583 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2584 } else if (!slot3_in_use) {
2586 child->thread.debug.iac3 = bp_info->addr;
2587 child->thread.debug.dbcr0 |= DBCR0_IAC3;
2588 } else if (!slot4_in_use) {
2590 child->thread.debug.iac4 = bp_info->addr;
2591 child->thread.debug.dbcr0 |= DBCR0_IAC4;
2597 child->thread.debug.dbcr0 |= DBCR0_IDM;
2598 child->thread.regs->msr |= MSR_DE;
2603 static int del_instruction_bp(struct task_struct *child, int slot)
2607 if ((child->thread.debug.dbcr0 & DBCR0_IAC1) == 0)
2610 if (dbcr_iac_range(child) & DBCR_IAC12MODE) {
2611 /* address range - clear slots 1 & 2 */
2612 child->thread.debug.iac2 = 0;
2613 dbcr_iac_range(child) &= ~DBCR_IAC12MODE;
2615 child->thread.debug.iac1 = 0;
2616 child->thread.debug.dbcr0 &= ~DBCR0_IAC1;
2619 if ((child->thread.debug.dbcr0 & DBCR0_IAC2) == 0)
2622 if (dbcr_iac_range(child) & DBCR_IAC12MODE)
2623 /* used in a range */
2625 child->thread.debug.iac2 = 0;
2626 child->thread.debug.dbcr0 &= ~DBCR0_IAC2;
2628 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
2630 if ((child->thread.debug.dbcr0 & DBCR0_IAC3) == 0)
2633 if (dbcr_iac_range(child) & DBCR_IAC34MODE) {
2634 /* address range - clear slots 3 & 4 */
2635 child->thread.debug.iac4 = 0;
2636 dbcr_iac_range(child) &= ~DBCR_IAC34MODE;
2638 child->thread.debug.iac3 = 0;
2639 child->thread.debug.dbcr0 &= ~DBCR0_IAC3;
2642 if ((child->thread.debug.dbcr0 & DBCR0_IAC4) == 0)
2645 if (dbcr_iac_range(child) & DBCR_IAC34MODE)
2646 /* Used in a range */
2648 child->thread.debug.iac4 = 0;
2649 child->thread.debug.dbcr0 &= ~DBCR0_IAC4;
2658 static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info)
2661 (bp_info->condition_mode >> PPC_BREAKPOINT_CONDITION_BE_SHIFT)
2663 int condition_mode =
2664 bp_info->condition_mode & PPC_BREAKPOINT_CONDITION_MODE;
2667 if (byte_enable && (condition_mode == 0))
2670 if (bp_info->addr >= TASK_SIZE)
2673 if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0) {
2675 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2676 dbcr_dac(child) |= DBCR_DAC1R;
2677 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2678 dbcr_dac(child) |= DBCR_DAC1W;
2679 child->thread.debug.dac1 = (unsigned long)bp_info->addr;
2680 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2682 child->thread.debug.dvc1 =
2683 (unsigned long)bp_info->condition_value;
2684 child->thread.debug.dbcr2 |=
2685 ((byte_enable << DBCR2_DVC1BE_SHIFT) |
2686 (condition_mode << DBCR2_DVC1M_SHIFT));
2689 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2690 } else if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
2691 /* Both dac1 and dac2 are part of a range */
2694 } else if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0) {
2696 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2697 dbcr_dac(child) |= DBCR_DAC2R;
2698 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2699 dbcr_dac(child) |= DBCR_DAC2W;
2700 child->thread.debug.dac2 = (unsigned long)bp_info->addr;
2701 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2703 child->thread.debug.dvc2 =
2704 (unsigned long)bp_info->condition_value;
2705 child->thread.debug.dbcr2 |=
2706 ((byte_enable << DBCR2_DVC2BE_SHIFT) |
2707 (condition_mode << DBCR2_DVC2M_SHIFT));
2712 child->thread.debug.dbcr0 |= DBCR0_IDM;
2713 child->thread.regs->msr |= MSR_DE;
2718 static int del_dac(struct task_struct *child, int slot)
2721 if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0)
2724 child->thread.debug.dac1 = 0;
2725 dbcr_dac(child) &= ~(DBCR_DAC1R | DBCR_DAC1W);
2726 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2727 if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
2728 child->thread.debug.dac2 = 0;
2729 child->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;
2731 child->thread.debug.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);
2733 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2734 child->thread.debug.dvc1 = 0;
2736 } else if (slot == 2) {
2737 if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0)
2740 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2741 if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE)
2742 /* Part of a range */
2744 child->thread.debug.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);
2746 #if CONFIG_PPC_ADV_DEBUG_DVCS > 0
2747 child->thread.debug.dvc2 = 0;
2749 child->thread.debug.dac2 = 0;
2750 dbcr_dac(child) &= ~(DBCR_DAC2R | DBCR_DAC2W);
2756 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
2758 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2759 static int set_dac_range(struct task_struct *child,
2760 struct ppc_hw_breakpoint *bp_info)
2762 int mode = bp_info->addr_mode & PPC_BREAKPOINT_MODE_MASK;
2764 /* We don't allow range watchpoints to be used with DVC */
2765 if (bp_info->condition_mode)
2769 * Best effort to verify the address range. The user/supervisor bits
2770 * prevent trapping in kernel space, but let's fail on an obvious bad
2771 * range. The simple test on the mask is not fool-proof, and any
2772 * exclusive range will spill over into kernel space.
2774 if (bp_info->addr >= TASK_SIZE)
2776 if (mode == PPC_BREAKPOINT_MODE_MASK) {
2778 * dac2 is a bitmask. Don't allow a mask that makes a
2779 * kernel space address from a valid dac1 value
2781 if (~((unsigned long)bp_info->addr2) >= TASK_SIZE)
2785 * For range breakpoints, addr2 must also be a valid address
2787 if (bp_info->addr2 >= TASK_SIZE)
2791 if (child->thread.debug.dbcr0 &
2792 (DBCR0_DAC1R | DBCR0_DAC1W | DBCR0_DAC2R | DBCR0_DAC2W))
2795 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2796 child->thread.debug.dbcr0 |= (DBCR0_DAC1R | DBCR0_IDM);
2797 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2798 child->thread.debug.dbcr0 |= (DBCR0_DAC1W | DBCR0_IDM);
2799 child->thread.debug.dac1 = bp_info->addr;
2800 child->thread.debug.dac2 = bp_info->addr2;
2801 if (mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
2802 child->thread.debug.dbcr2 |= DBCR2_DAC12M;
2803 else if (mode == PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
2804 child->thread.debug.dbcr2 |= DBCR2_DAC12MX;
2805 else /* PPC_BREAKPOINT_MODE_MASK */
2806 child->thread.debug.dbcr2 |= DBCR2_DAC12MM;
2807 child->thread.regs->msr |= MSR_DE;
2811 #endif /* CONFIG_PPC_ADV_DEBUG_DAC_RANGE */
2813 static long ppc_set_hwdebug(struct task_struct *child,
2814 struct ppc_hw_breakpoint *bp_info)
2816 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2818 struct thread_struct *thread = &(child->thread);
2819 struct perf_event *bp;
2820 struct perf_event_attr attr;
2821 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2822 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
2823 struct arch_hw_breakpoint brk;
2826 if (bp_info->version != 1)
2828 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2830 * Check for invalid flags and combinations
2832 if ((bp_info->trigger_type == 0) ||
2833 (bp_info->trigger_type & ~(PPC_BREAKPOINT_TRIGGER_EXECUTE |
2834 PPC_BREAKPOINT_TRIGGER_RW)) ||
2835 (bp_info->addr_mode & ~PPC_BREAKPOINT_MODE_MASK) ||
2836 (bp_info->condition_mode &
2837 ~(PPC_BREAKPOINT_CONDITION_MODE |
2838 PPC_BREAKPOINT_CONDITION_BE_ALL)))
2840 #if CONFIG_PPC_ADV_DEBUG_DVCS == 0
2841 if (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
2845 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_EXECUTE) {
2846 if ((bp_info->trigger_type != PPC_BREAKPOINT_TRIGGER_EXECUTE) ||
2847 (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE))
2849 return set_instruction_bp(child, bp_info);
2851 if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
2852 return set_dac(child, bp_info);
2854 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
2855 return set_dac_range(child, bp_info);
2859 #else /* !CONFIG_PPC_ADV_DEBUG_DVCS */
2861 * We only support one data breakpoint
2863 if ((bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_RW) == 0 ||
2864 (bp_info->trigger_type & ~PPC_BREAKPOINT_TRIGGER_RW) != 0 ||
2865 bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
2868 if ((unsigned long)bp_info->addr >= TASK_SIZE)
2871 brk.address = bp_info->addr & ~7UL;
2872 brk.type = HW_BRK_TYPE_TRANSLATE;
2874 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
2875 brk.type |= HW_BRK_TYPE_READ;
2876 if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
2877 brk.type |= HW_BRK_TYPE_WRITE;
2878 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2880 * Check if the request is for 'range' breakpoints. We can
2881 * support it if range < 8 bytes.
2883 if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
2884 len = bp_info->addr2 - bp_info->addr;
2885 else if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
2889 bp = thread->ptrace_bps[0];
2893 /* Create a new breakpoint request if one doesn't exist already */
2894 hw_breakpoint_init(&attr);
2895 attr.bp_addr = (unsigned long)bp_info->addr & ~HW_BREAKPOINT_ALIGN;
2897 arch_bp_generic_fields(brk.type, &attr.bp_type);
2899 thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
2900 ptrace_triggered, NULL, child);
2902 thread->ptrace_bps[0] = NULL;
2907 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2909 if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT)
2912 if (child->thread.hw_brk.address)
2915 if (!ppc_breakpoint_available())
2918 child->thread.hw_brk = brk;
2921 #endif /* !CONFIG_PPC_ADV_DEBUG_DVCS */
2924 static long ppc_del_hwdebug(struct task_struct *child, long data)
2926 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2928 struct thread_struct *thread = &(child->thread);
2929 struct perf_event *bp;
2930 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2931 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
2935 rc = del_instruction_bp(child, (int)data);
2937 rc = del_dac(child, (int)data - 4);
2940 if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0,
2941 child->thread.debug.dbcr1)) {
2942 child->thread.debug.dbcr0 &= ~DBCR0_IDM;
2943 child->thread.regs->msr &= ~MSR_DE;
2951 #ifdef CONFIG_HAVE_HW_BREAKPOINT
2952 bp = thread->ptrace_bps[0];
2954 unregister_hw_breakpoint(bp);
2955 thread->ptrace_bps[0] = NULL;
2959 #else /* CONFIG_HAVE_HW_BREAKPOINT */
2960 if (child->thread.hw_brk.address == 0)
2963 child->thread.hw_brk.address = 0;
2964 child->thread.hw_brk.type = 0;
2965 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
2971 long arch_ptrace(struct task_struct *child, long request,
2972 unsigned long addr, unsigned long data)
2975 void __user *datavp = (void __user *) data;
2976 unsigned long __user *datalp = datavp;
2979 /* read the word at location addr in the USER area. */
2980 case PTRACE_PEEKUSR: {
2981 unsigned long index, tmp;
2984 /* convert to index and check */
2987 if ((addr & 3) || (index > PT_FPSCR)
2988 || (child->thread.regs == NULL))
2991 if ((addr & 7) || (index > PT_FPSCR))
2995 CHECK_FULL_REGS(child->thread.regs);
2996 if (index < PT_FPR0) {
2997 ret = ptrace_get_reg(child, (int) index, &tmp);
3001 unsigned int fpidx = index - PT_FPR0;
3003 flush_fp_to_thread(child);
3004 if (fpidx < (PT_FPSCR - PT_FPR0))
3005 memcpy(&tmp, &child->thread.TS_FPR(fpidx),
3008 tmp = child->thread.fp_state.fpscr;
3010 ret = put_user(tmp, datalp);
3014 /* write the word at location addr in the USER area */
3015 case PTRACE_POKEUSR: {
3016 unsigned long index;
3019 /* convert to index and check */
3022 if ((addr & 3) || (index > PT_FPSCR)
3023 || (child->thread.regs == NULL))
3026 if ((addr & 7) || (index > PT_FPSCR))
3030 CHECK_FULL_REGS(child->thread.regs);
3031 if (index < PT_FPR0) {
3032 ret = ptrace_put_reg(child, index, data);
3034 unsigned int fpidx = index - PT_FPR0;
3036 flush_fp_to_thread(child);
3037 if (fpidx < (PT_FPSCR - PT_FPR0))
3038 memcpy(&child->thread.TS_FPR(fpidx), &data,
3041 child->thread.fp_state.fpscr = data;
3047 case PPC_PTRACE_GETHWDBGINFO: {
3048 struct ppc_debug_info dbginfo;
3050 dbginfo.version = 1;
3051 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
3052 dbginfo.num_instruction_bps = CONFIG_PPC_ADV_DEBUG_IACS;
3053 dbginfo.num_data_bps = CONFIG_PPC_ADV_DEBUG_DACS;
3054 dbginfo.num_condition_regs = CONFIG_PPC_ADV_DEBUG_DVCS;
3055 dbginfo.data_bp_alignment = 4;
3056 dbginfo.sizeof_condition = 4;
3057 dbginfo.features = PPC_DEBUG_FEATURE_INSN_BP_RANGE |
3058 PPC_DEBUG_FEATURE_INSN_BP_MASK;
3059 #ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
3061 PPC_DEBUG_FEATURE_DATA_BP_RANGE |
3062 PPC_DEBUG_FEATURE_DATA_BP_MASK;
3064 #else /* !CONFIG_PPC_ADV_DEBUG_REGS */
3065 dbginfo.num_instruction_bps = 0;
3066 if (ppc_breakpoint_available())
3067 dbginfo.num_data_bps = 1;
3069 dbginfo.num_data_bps = 0;
3070 dbginfo.num_condition_regs = 0;
3072 dbginfo.data_bp_alignment = 8;
3074 dbginfo.data_bp_alignment = 4;
3076 dbginfo.sizeof_condition = 0;
3077 #ifdef CONFIG_HAVE_HW_BREAKPOINT
3078 dbginfo.features = PPC_DEBUG_FEATURE_DATA_BP_RANGE;
3079 if (cpu_has_feature(CPU_FTR_DAWR))
3080 dbginfo.features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR;
3082 dbginfo.features = 0;
3083 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
3084 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
3086 if (copy_to_user(datavp, &dbginfo,
3087 sizeof(struct ppc_debug_info)))
3092 case PPC_PTRACE_SETHWDEBUG: {
3093 struct ppc_hw_breakpoint bp_info;
3095 if (copy_from_user(&bp_info, datavp,
3096 sizeof(struct ppc_hw_breakpoint)))
3098 return ppc_set_hwdebug(child, &bp_info);
3101 case PPC_PTRACE_DELHWDEBUG: {
3102 ret = ppc_del_hwdebug(child, data);
3106 case PTRACE_GET_DEBUGREG: {
3107 #ifndef CONFIG_PPC_ADV_DEBUG_REGS
3108 unsigned long dabr_fake;
3111 /* We only support one DABR and no IABRS at the moment */
3114 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
3115 ret = put_user(child->thread.debug.dac1, datalp);
3117 dabr_fake = ((child->thread.hw_brk.address & (~HW_BRK_TYPE_DABR)) |
3118 (child->thread.hw_brk.type & HW_BRK_TYPE_DABR));
3119 ret = put_user(dabr_fake, datalp);
3124 case PTRACE_SET_DEBUGREG:
3125 ret = ptrace_set_debugreg(child, addr, data);
3129 case PTRACE_GETREGS64:
3131 case PTRACE_GETREGS: /* Get all pt_regs from the child. */
3132 return copy_regset_to_user(child, &user_ppc_native_view,
3134 0, sizeof(struct user_pt_regs),
3138 case PTRACE_SETREGS64:
3140 case PTRACE_SETREGS: /* Set all gp regs in the child. */
3141 return copy_regset_from_user(child, &user_ppc_native_view,
3143 0, sizeof(struct user_pt_regs),
3146 case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */
3147 return copy_regset_to_user(child, &user_ppc_native_view,
3149 0, sizeof(elf_fpregset_t),
3152 case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */
3153 return copy_regset_from_user(child, &user_ppc_native_view,
3155 0, sizeof(elf_fpregset_t),
3158 #ifdef CONFIG_ALTIVEC
3159 case PTRACE_GETVRREGS:
3160 return copy_regset_to_user(child, &user_ppc_native_view,
3162 0, (33 * sizeof(vector128) +
3166 case PTRACE_SETVRREGS:
3167 return copy_regset_from_user(child, &user_ppc_native_view,
3169 0, (33 * sizeof(vector128) +
3174 case PTRACE_GETVSRREGS:
3175 return copy_regset_to_user(child, &user_ppc_native_view,
3177 0, 32 * sizeof(double),
3180 case PTRACE_SETVSRREGS:
3181 return copy_regset_from_user(child, &user_ppc_native_view,
3183 0, 32 * sizeof(double),
3187 case PTRACE_GETEVRREGS:
3188 /* Get the child spe register state. */
3189 return copy_regset_to_user(child, &user_ppc_native_view,
3190 REGSET_SPE, 0, 35 * sizeof(u32),
3193 case PTRACE_SETEVRREGS:
3194 /* Set the child spe register state. */
3195 return copy_regset_from_user(child, &user_ppc_native_view,
3196 REGSET_SPE, 0, 35 * sizeof(u32),
3201 ret = ptrace_request(child, request, addr, data);
3207 #ifdef CONFIG_SECCOMP
3208 static int do_seccomp(struct pt_regs *regs)
3210 if (!test_thread_flag(TIF_SECCOMP))
3214 * The ABI we present to seccomp tracers is that r3 contains
3215 * the syscall return value and orig_gpr3 contains the first
3216 * syscall parameter. This is different to the ptrace ABI where
3217 * both r3 and orig_gpr3 contain the first syscall parameter.
3219 regs->gpr[3] = -ENOSYS;
3222 * We use the __ version here because we have already checked
3223 * TIF_SECCOMP. If this fails, there is nothing left to do, we
3224 * have already loaded -ENOSYS into r3, or seccomp has put
3225 * something else in r3 (via SECCOMP_RET_ERRNO/TRACE).
3227 if (__secure_computing(NULL))
3231 * The syscall was allowed by seccomp, restore the register
3232 * state to what audit expects.
3233 * Note that we use orig_gpr3, which means a seccomp tracer can
3234 * modify the first syscall parameter (in orig_gpr3) and also
3235 * allow the syscall to proceed.
3237 regs->gpr[3] = regs->orig_gpr3;
3242 static inline int do_seccomp(struct pt_regs *regs) { return 0; }
3243 #endif /* CONFIG_SECCOMP */
3246 * do_syscall_trace_enter() - Do syscall tracing on kernel entry.
3247 * @regs: the pt_regs of the task to trace (current)
3249 * Performs various types of tracing on syscall entry. This includes seccomp,
3250 * ptrace, syscall tracepoints and audit.
3252 * The pt_regs are potentially visible to userspace via ptrace, so their
3255 * One or more of the tracers may modify the contents of pt_regs, in particular
3256 * to modify arguments or even the syscall number itself.
3258 * It's also possible that a tracer can choose to reject the system call. In
3259 * that case this function will return an illegal syscall number, and will put
3260 * an appropriate return value in regs->r3.
3262 * Return: the (possibly changed) syscall number.
3264 long do_syscall_trace_enter(struct pt_regs *regs)
3270 flags = READ_ONCE(current_thread_info()->flags) &
3271 (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
3274 int rc = tracehook_report_syscall_entry(regs);
3276 if (unlikely(flags & _TIF_SYSCALL_EMU)) {
3278 * A nonzero return code from
3279 * tracehook_report_syscall_entry() tells us to prevent
3280 * the syscall execution, but we are not going to
3281 * execute it anyway.
3283 * Returning -1 will skip the syscall execution. We want
3284 * to avoid clobbering any registers, so we don't goto
3285 * the skip label below.
3292 * The tracer decided to abort the syscall. Note that
3293 * the tracer may also just change regs->gpr[0] to an
3294 * invalid syscall number, that is handled below on the
3301 /* Run seccomp after ptrace; allow it to set gpr[3]. */
3302 if (do_seccomp(regs))
3305 /* Avoid trace and audit when syscall is invalid. */
3306 if (regs->gpr[0] >= NR_syscalls)
3309 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
3310 trace_sys_enter(regs, regs->gpr[0]);
3313 if (!is_32bit_task())
3314 audit_syscall_entry(regs->gpr[0], regs->gpr[3], regs->gpr[4],
3315 regs->gpr[5], regs->gpr[6]);
3318 audit_syscall_entry(regs->gpr[0],
3319 regs->gpr[3] & 0xffffffff,
3320 regs->gpr[4] & 0xffffffff,
3321 regs->gpr[5] & 0xffffffff,
3322 regs->gpr[6] & 0xffffffff);
3324 /* Return the possibly modified but valid syscall number */
3325 return regs->gpr[0];
3329 * If we are aborting explicitly, or if the syscall number is
3330 * now invalid, set the return value to -ENOSYS.
3332 regs->gpr[3] = -ENOSYS;
3336 void do_syscall_trace_leave(struct pt_regs *regs)
3340 audit_syscall_exit(regs);
3342 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
3343 trace_sys_exit(regs, regs->result);
3345 step = test_thread_flag(TIF_SINGLESTEP);
3346 if (step || test_thread_flag(TIF_SYSCALL_TRACE))
3347 tracehook_report_syscall_exit(regs, step);
3352 void __init pt_regs_check(void)
3354 BUILD_BUG_ON(offsetof(struct pt_regs, gpr) !=
3355 offsetof(struct user_pt_regs, gpr));
3356 BUILD_BUG_ON(offsetof(struct pt_regs, nip) !=
3357 offsetof(struct user_pt_regs, nip));
3358 BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
3359 offsetof(struct user_pt_regs, msr));
3360 BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
3361 offsetof(struct user_pt_regs, msr));
3362 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
3363 offsetof(struct user_pt_regs, orig_gpr3));
3364 BUILD_BUG_ON(offsetof(struct pt_regs, ctr) !=
3365 offsetof(struct user_pt_regs, ctr));
3366 BUILD_BUG_ON(offsetof(struct pt_regs, link) !=
3367 offsetof(struct user_pt_regs, link));
3368 BUILD_BUG_ON(offsetof(struct pt_regs, xer) !=
3369 offsetof(struct user_pt_regs, xer));
3370 BUILD_BUG_ON(offsetof(struct pt_regs, ccr) !=
3371 offsetof(struct user_pt_regs, ccr));
3372 #ifdef __powerpc64__
3373 BUILD_BUG_ON(offsetof(struct pt_regs, softe) !=
3374 offsetof(struct user_pt_regs, softe));
3376 BUILD_BUG_ON(offsetof(struct pt_regs, mq) !=
3377 offsetof(struct user_pt_regs, mq));
3379 BUILD_BUG_ON(offsetof(struct pt_regs, trap) !=
3380 offsetof(struct user_pt_regs, trap));
3381 BUILD_BUG_ON(offsetof(struct pt_regs, dar) !=
3382 offsetof(struct user_pt_regs, dar));
3383 BUILD_BUG_ON(offsetof(struct pt_regs, dsisr) !=
3384 offsetof(struct user_pt_regs, dsisr));
3385 BUILD_BUG_ON(offsetof(struct pt_regs, result) !=
3386 offsetof(struct user_pt_regs, result));
3388 BUILD_BUG_ON(sizeof(struct user_pt_regs) > sizeof(struct pt_regs));