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authorChristophe Leroy <christophe.leroy@c-s.fr>2020-02-28 00:14:37 +0000
committerMichael Ellerman <mpe@ellerman.id.au>2020-04-01 14:30:41 +1100
commitda9a1c10e2c7311e923210b6ccd9fbd1ac9132df (patch)
treebe0aa14d776e4c70b05744913240d1f6d33e9a7d /arch/powerpc/kernel/ptrace.c
parent5f0b6ac3905fc961f3b685a08eb4962ff071ea7d (diff)
powerpc: Move ptrace into a subdirectory.
In order to allow splitting of ptrace depending on the different CONFIG_ options, create a subdirectory dedicated to ptrace and move ptrace.c and ptrace32.c into it. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/9ebcbe37834e9d447dd97f4381084795a673260c.1582848567.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/ptrace.c')
-rw-r--r--arch/powerpc/kernel/ptrace.c3468
1 files changed, 0 insertions, 3468 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
deleted file mode 100644
index 25c0424e8868..000000000000
--- a/arch/powerpc/kernel/ptrace.c
+++ /dev/null
@@ -1,3468 +0,0 @@
-/*
- * PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Derived from "arch/m68k/kernel/ptrace.c"
- * Copyright (C) 1994 by Hamish Macdonald
- * Taken from linux/kernel/ptrace.c and modified for M680x0.
- * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * Modified by Cort Dougan (cort@hq.fsmlabs.com)
- * and Paul Mackerras (paulus@samba.org).
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file README.legal in the main directory of
- * this archive for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/regset.h>
-#include <linux/tracehook.h>
-#include <linux/elf.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/signal.h>
-#include <linux/seccomp.h>
-#include <linux/audit.h>
-#include <trace/syscall.h>
-#include <linux/hw_breakpoint.h>
-#include <linux/perf_event.h>
-#include <linux/context_tracking.h>
-#include <linux/nospec.h>
-
-#include <linux/uaccess.h>
-#include <linux/pkeys.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/switch_to.h>
-#include <asm/tm.h>
-#include <asm/asm-prototypes.h>
-#include <asm/debug.h>
-#include <asm/hw_breakpoint.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/syscalls.h>
-
-/*
- * The parameter save area on the stack is used to store arguments being passed
- * to callee function and is located at fixed offset from stack pointer.
- */
-#ifdef CONFIG_PPC32
-#define PARAMETER_SAVE_AREA_OFFSET 24 /* bytes */
-#else /* CONFIG_PPC32 */
-#define PARAMETER_SAVE_AREA_OFFSET 48 /* bytes */
-#endif
-
-struct pt_regs_offset {
- const char *name;
- int offset;
-};
-
-#define STR(s) #s /* convert to string */
-#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
-#define GPR_OFFSET_NAME(num) \
- {.name = STR(r##num), .offset = offsetof(struct pt_regs, gpr[num])}, \
- {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
-#define REG_OFFSET_END {.name = NULL, .offset = 0}
-
-#define TVSO(f) (offsetof(struct thread_vr_state, f))
-#define TFSO(f) (offsetof(struct thread_fp_state, f))
-#define TSO(f) (offsetof(struct thread_struct, f))
-
-static const struct pt_regs_offset regoffset_table[] = {
- GPR_OFFSET_NAME(0),
- GPR_OFFSET_NAME(1),
- GPR_OFFSET_NAME(2),
- GPR_OFFSET_NAME(3),
- GPR_OFFSET_NAME(4),
- GPR_OFFSET_NAME(5),
- GPR_OFFSET_NAME(6),
- GPR_OFFSET_NAME(7),
- GPR_OFFSET_NAME(8),
- GPR_OFFSET_NAME(9),
- GPR_OFFSET_NAME(10),
- GPR_OFFSET_NAME(11),
- GPR_OFFSET_NAME(12),
- GPR_OFFSET_NAME(13),
- GPR_OFFSET_NAME(14),
- GPR_OFFSET_NAME(15),
- GPR_OFFSET_NAME(16),
- GPR_OFFSET_NAME(17),
- GPR_OFFSET_NAME(18),
- GPR_OFFSET_NAME(19),
- GPR_OFFSET_NAME(20),
- GPR_OFFSET_NAME(21),
- GPR_OFFSET_NAME(22),
- GPR_OFFSET_NAME(23),
- GPR_OFFSET_NAME(24),
- GPR_OFFSET_NAME(25),
- GPR_OFFSET_NAME(26),
- GPR_OFFSET_NAME(27),
- GPR_OFFSET_NAME(28),
- GPR_OFFSET_NAME(29),
- GPR_OFFSET_NAME(30),
- GPR_OFFSET_NAME(31),
- REG_OFFSET_NAME(nip),
- REG_OFFSET_NAME(msr),
- REG_OFFSET_NAME(ctr),
- REG_OFFSET_NAME(link),
- REG_OFFSET_NAME(xer),
- REG_OFFSET_NAME(ccr),
-#ifdef CONFIG_PPC64
- REG_OFFSET_NAME(softe),
-#else
- REG_OFFSET_NAME(mq),
-#endif
- REG_OFFSET_NAME(trap),
- REG_OFFSET_NAME(dar),
- REG_OFFSET_NAME(dsisr),
- REG_OFFSET_END,
-};
-
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-static void flush_tmregs_to_thread(struct task_struct *tsk)
-{
- /*
- * If task is not current, it will have been flushed already to
- * it's thread_struct during __switch_to().
- *
- * A reclaim flushes ALL the state or if not in TM save TM SPRs
- * in the appropriate thread structures from live.
- */
-
- if ((!cpu_has_feature(CPU_FTR_TM)) || (tsk != current))
- return;
-
- if (MSR_TM_SUSPENDED(mfmsr())) {
- tm_reclaim_current(TM_CAUSE_SIGNAL);
- } else {
- tm_enable();
- tm_save_sprs(&(tsk->thread));
- }
-}
-#else
-static inline void flush_tmregs_to_thread(struct task_struct *tsk) { }
-#endif
-
-/**
- * regs_query_register_offset() - query register offset from its name
- * @name: the name of a register
- *
- * regs_query_register_offset() returns the offset of a register in struct
- * pt_regs from its name. If the name is invalid, this returns -EINVAL;
- */
-int regs_query_register_offset(const char *name)
-{
- const struct pt_regs_offset *roff;
- for (roff = regoffset_table; roff->name != NULL; roff++)
- if (!strcmp(roff->name, name))
- return roff->offset;
- return -EINVAL;
-}
-
-/**
- * regs_query_register_name() - query register name from its offset
- * @offset: the offset of a register in struct pt_regs.
- *
- * regs_query_register_name() returns the name of a register from its
- * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
- */
-const char *regs_query_register_name(unsigned int offset)
-{
- const struct pt_regs_offset *roff;
- for (roff = regoffset_table; roff->name != NULL; roff++)
- if (roff->offset == offset)
- return roff->name;
- return NULL;
-}
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * Set of msr bits that gdb can change on behalf of a process.
- */
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
-#define MSR_DEBUGCHANGE 0
-#else
-#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
-#endif
-
-/*
- * Max register writeable via put_reg
- */
-#ifdef CONFIG_PPC32
-#define PT_MAX_PUT_REG PT_MQ
-#else
-#define PT_MAX_PUT_REG PT_CCR
-#endif
-
-static unsigned long get_user_msr(struct task_struct *task)
-{
- return task->thread.regs->msr | task->thread.fpexc_mode;
-}
-
-static int set_user_msr(struct task_struct *task, unsigned long msr)
-{
- task->thread.regs->msr &= ~MSR_DEBUGCHANGE;
- task->thread.regs->msr |= msr & MSR_DEBUGCHANGE;
- return 0;
-}
-
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-static unsigned long get_user_ckpt_msr(struct task_struct *task)
-{
- return task->thread.ckpt_regs.msr | task->thread.fpexc_mode;
-}
-
-static int set_user_ckpt_msr(struct task_struct *task, unsigned long msr)
-{
- task->thread.ckpt_regs.msr &= ~MSR_DEBUGCHANGE;
- task->thread.ckpt_regs.msr |= msr & MSR_DEBUGCHANGE;
- return 0;
-}
-
-static int set_user_ckpt_trap(struct task_struct *task, unsigned long trap)
-{
- task->thread.ckpt_regs.trap = trap & 0xfff0;
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PPC64
-static int get_user_dscr(struct task_struct *task, unsigned long *data)
-{
- *data = task->thread.dscr;
- return 0;
-}
-
-static int set_user_dscr(struct task_struct *task, unsigned long dscr)
-{
- task->thread.dscr = dscr;
- task->thread.dscr_inherit = 1;
- return 0;
-}
-#else
-static int get_user_dscr(struct task_struct *task, unsigned long *data)
-{
- return -EIO;
-}
-
-static int set_user_dscr(struct task_struct *task, unsigned long dscr)
-{
- return -EIO;
-}
-#endif
-
-/*
- * We prevent mucking around with the reserved area of trap
- * which are used internally by the kernel.
- */
-static int set_user_trap(struct task_struct *task, unsigned long trap)
-{
- task->thread.regs->trap = trap & 0xfff0;
- return 0;
-}
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)
-{
- unsigned int regs_max;
-
- if ((task->thread.regs == NULL) || !data)
- return -EIO;
-
- if (regno == PT_MSR) {
- *data = get_user_msr(task);
- return 0;
- }
-
- if (regno == PT_DSCR)
- return get_user_dscr(task, data);
-
-#ifdef CONFIG_PPC64
- /*
- * softe copies paca->irq_soft_mask variable state. Since irq_soft_mask is
- * no more used as a flag, lets force usr to alway see the softe value as 1
- * which means interrupts are not soft disabled.
- */
- if (regno == PT_SOFTE) {
- *data = 1;
- return 0;
- }
-#endif
-
- regs_max = sizeof(struct user_pt_regs) / sizeof(unsigned long);
- if (regno < regs_max) {
- regno = array_index_nospec(regno, regs_max);
- *data = ((unsigned long *)task->thread.regs)[regno];
- return 0;
- }
-
- return -EIO;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
-{
- if (task->thread.regs == NULL)
- return -EIO;
-
- if (regno == PT_MSR)
- return set_user_msr(task, data);
- if (regno == PT_TRAP)
- return set_user_trap(task, data);
- if (regno == PT_DSCR)
- return set_user_dscr(task, data);
-
- if (regno <= PT_MAX_PUT_REG) {
- regno = array_index_nospec(regno, PT_MAX_PUT_REG + 1);
- ((unsigned long *)task->thread.regs)[regno] = data;
- return 0;
- }
- return -EIO;
-}
-
-static int gpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int i, ret;
-
- if (target->thread.regs == NULL)
- return -EIO;
-
- if (!FULL_REGS(target->thread.regs)) {
- /* We have a partial register set. Fill 14-31 with bogus values */
- for (i = 14; i < 32; i++)
- target->thread.regs->gpr[i] = NV_REG_POISON;
- }
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- target->thread.regs,
- 0, offsetof(struct pt_regs, msr));
- if (!ret) {
- unsigned long msr = get_user_msr(target);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
- offsetof(struct pt_regs, msr),
- offsetof(struct pt_regs, msr) +
- sizeof(msr));
- }
-
- BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
- offsetof(struct pt_regs, msr) + sizeof(long));
-
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->orig_gpr3,
- offsetof(struct pt_regs, orig_gpr3),
- sizeof(struct user_pt_regs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct user_pt_regs), -1);
-
- return ret;
-}
-
-static int gpr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- unsigned long reg;
- int ret;
-
- if (target->thread.regs == NULL)
- return -EIO;
-
- CHECK_FULL_REGS(target->thread.regs);
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- target->thread.regs,
- 0, PT_MSR * sizeof(reg));
-
- if (!ret && count > 0) {
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
- PT_MSR * sizeof(reg),
- (PT_MSR + 1) * sizeof(reg));
- if (!ret)
- ret = set_user_msr(target, reg);
- }
-
- BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
- offsetof(struct pt_regs, msr) + sizeof(long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->orig_gpr3,
- PT_ORIG_R3 * sizeof(reg),
- (PT_MAX_PUT_REG + 1) * sizeof(reg));
-
- if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
- ret = user_regset_copyin_ignore(
- &pos, &count, &kbuf, &ubuf,
- (PT_MAX_PUT_REG + 1) * sizeof(reg),
- PT_TRAP * sizeof(reg));
-
- if (!ret && count > 0) {
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
- PT_TRAP * sizeof(reg),
- (PT_TRAP + 1) * sizeof(reg));
- if (!ret)
- ret = set_user_trap(target, reg);
- }
-
- if (!ret)
- ret = user_regset_copyin_ignore(
- &pos, &count, &kbuf, &ubuf,
- (PT_TRAP + 1) * sizeof(reg), -1);
-
- return ret;
-}
-
-/*
- * Regardless of transactions, 'fp_state' holds the current running
- * value of all FPR registers and 'ckfp_state' holds the last checkpointed
- * value of all FPR registers for the current transaction.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * u64 fpr[32];
- * u64 fpscr;
- * };
- */
-static int fpr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
-#ifdef CONFIG_VSX
- u64 buf[33];
- int i;
-
- flush_fp_to_thread(target);
-
- /* copy to local buffer then write that out */
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.TS_FPR(i);
- buf[32] = target->thread.fp_state.fpscr;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
-#else
- BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
- offsetof(struct thread_fp_state, fpr[32]));
-
- flush_fp_to_thread(target);
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.fp_state, 0, -1);
-#endif
-}
-
-/*
- * Regardless of transactions, 'fp_state' holds the current running
- * value of all FPR registers and 'ckfp_state' holds the last checkpointed
- * value of all FPR registers for the current transaction.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * u64 fpr[32];
- * u64 fpscr;
- * };
- *
- */
-static int fpr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
-#ifdef CONFIG_VSX
- u64 buf[33];
- int i;
-
- flush_fp_to_thread(target);
-
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.TS_FPR(i);
- buf[32] = target->thread.fp_state.fpscr;
-
- /* copy to local buffer then write that out */
- i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
- if (i)
- return i;
-
- for (i = 0; i < 32 ; i++)
- target->thread.TS_FPR(i) = buf[i];
- target->thread.fp_state.fpscr = buf[32];
- return 0;
-#else
- BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
- offsetof(struct thread_fp_state, fpr[32]));
-
- flush_fp_to_thread(target);
-
- return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.fp_state, 0, -1);
-#endif
-}
-
-#ifdef CONFIG_ALTIVEC
-/*
- * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
- * The transfer totals 34 quadword. Quadwords 0-31 contain the
- * corresponding vector registers. Quadword 32 contains the vscr as the
- * last word (offset 12) within that quadword. Quadword 33 contains the
- * vrsave as the first word (offset 0) within the quadword.
- *
- * This definition of the VMX state is compatible with the current PPC32
- * ptrace interface. This allows signal handling and ptrace to use the
- * same structures. This also simplifies the implementation of a bi-arch
- * (combined (32- and 64-bit) gdb.
- */
-
-static int vr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- flush_altivec_to_thread(target);
- return target->thread.used_vr ? regset->n : 0;
-}
-
-/*
- * Regardless of transactions, 'vr_state' holds the current running
- * value of all the VMX registers and 'ckvr_state' holds the last
- * checkpointed value of all the VMX registers for the current
- * transaction to fall back on in case it aborts.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * vector128 vr[32];
- * vector128 vscr;
- * vector128 vrsave;
- * };
- */
-static int vr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- flush_altivec_to_thread(target);
-
- BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
- offsetof(struct thread_vr_state, vr[32]));
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
- 33 * sizeof(vector128));
- if (!ret) {
- /*
- * Copy out only the low-order word of vrsave.
- */
- int start, end;
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
-
- vrsave.word = target->thread.vrsave;
-
- start = 33 * sizeof(vector128);
- end = start + sizeof(vrsave);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
- start, end);
- }
-
- return ret;
-}
-
-/*
- * Regardless of transactions, 'vr_state' holds the current running
- * value of all the VMX registers and 'ckvr_state' holds the last
- * checkpointed value of all the VMX registers for the current
- * transaction to fall back on in case it aborts.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * vector128 vr[32];
- * vector128 vscr;
- * vector128 vrsave;
- * };
- */
-static int vr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- flush_altivec_to_thread(target);
-
- BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
- offsetof(struct thread_vr_state, vr[32]));
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.vr_state, 0,
- 33 * sizeof(vector128));
- if (!ret && count > 0) {
- /*
- * We use only the first word of vrsave.
- */
- int start, end;
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
-
- vrsave.word = target->thread.vrsave;
-
- start = 33 * sizeof(vector128);
- end = start + sizeof(vrsave);
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
- start, end);
- if (!ret)
- target->thread.vrsave = vrsave.word;
- }
-
- return ret;
-}
-#endif /* CONFIG_ALTIVEC */
-
-#ifdef CONFIG_VSX
-/*
- * Currently to set and and get all the vsx state, you need to call
- * the fp and VMX calls as well. This only get/sets the lower 32
- * 128bit VSX registers.
- */
-
-static int vsr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- flush_vsx_to_thread(target);
- return target->thread.used_vsr ? regset->n : 0;
-}
-
-/*
- * Regardless of transactions, 'fp_state' holds the current running
- * value of all FPR registers and 'ckfp_state' holds the last
- * checkpointed value of all FPR registers for the current
- * transaction.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * u64 vsx[32];
- * };
- */
-static int vsr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- u64 buf[32];
- int ret, i;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
- flush_vsx_to_thread(target);
-
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
-
- return ret;
-}
-
-/*
- * Regardless of transactions, 'fp_state' holds the current running
- * value of all FPR registers and 'ckfp_state' holds the last
- * checkpointed value of all FPR registers for the current
- * transaction.
- *
- * Userspace interface buffer layout:
- *
- * struct data {
- * u64 vsx[32];
- * };
- */
-static int vsr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- u64 buf[32];
- int ret,i;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
- flush_vsx_to_thread(target);
-
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
- if (!ret)
- for (i = 0; i < 32 ; i++)
- target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
-
- return ret;
-}
-#endif /* CONFIG_VSX */
-
-#ifdef CONFIG_SPE
-
-/*
- * For get_evrregs/set_evrregs functions 'data' has the following layout:
- *
- * struct {
- * u32 evr[32];
- * u64 acc;
- * u32 spefscr;
- * }
- */
-
-static int evr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- flush_spe_to_thread(target);
- return target->thread.used_spe ? regset->n : 0;
-}
-
-static int evr_get(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- flush_spe_to_thread(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.evr,
- 0, sizeof(target->thread.evr));
-
- BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
- offsetof(struct thread_struct, spefscr));
-
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.acc,
- sizeof(target->thread.evr), -1);
-
- return ret;
-}
-
-static int evr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- flush_spe_to_thread(target);
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.evr,
- 0, sizeof(target->thread.evr));
-
- BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
- offsetof(struct thread_struct, spefscr));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.acc,
- sizeof(target->thread.evr), -1);
-
- return ret;
-}
-#endif /* CONFIG_SPE */
-
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-/**
- * tm_cgpr_active - get active number of registers in CGPR
- * @target: The target task.
- * @regset: The user regset structure.
- *
- * This function checks for the active number of available
- * regisers in transaction checkpointed GPR category.
- */
-static int tm_cgpr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return 0;
-
- return regset->n;
-}
-
-/**
- * tm_cgpr_get - get CGPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
- *
- * This function gets transaction checkpointed GPR registers.
- *
- * When the transaction is active, 'ckpt_regs' holds all the checkpointed
- * GPR register values for the current transaction to fall back on if it
- * aborts in between. This function gets those checkpointed GPR registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct data {
- * struct pt_regs ckpt_regs;
- * };
- */
-static int tm_cgpr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs,
- 0, offsetof(struct pt_regs, msr));
- if (!ret) {
- unsigned long msr = get_user_ckpt_msr(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
- offsetof(struct pt_regs, msr),
- offsetof(struct pt_regs, msr) +
- sizeof(msr));
- }
-
- BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
- offsetof(struct pt_regs, msr) + sizeof(long));
-
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs.orig_gpr3,
- offsetof(struct pt_regs, orig_gpr3),
- sizeof(struct user_pt_regs));
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(struct user_pt_regs), -1);
-
- return ret;
-}
-
-/*
- * tm_cgpr_set - set the CGPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy into.
- * @ubuf: User buffer to copy from.
- *
- * This function sets in transaction checkpointed GPR registers.
- *
- * When the transaction is active, 'ckpt_regs' holds the checkpointed
- * GPR register values for the current transaction to fall back on if it
- * aborts in between. This function sets those checkpointed GPR registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct data {
- * struct pt_regs ckpt_regs;
- * };
- */
-static int tm_cgpr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- unsigned long reg;
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs,
- 0, PT_MSR * sizeof(reg));
-
- if (!ret && count > 0) {
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
- PT_MSR * sizeof(reg),
- (PT_MSR + 1) * sizeof(reg));
- if (!ret)
- ret = set_user_ckpt_msr(target, reg);
- }
-
- BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
- offsetof(struct pt_regs, msr) + sizeof(long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckpt_regs.orig_gpr3,
- PT_ORIG_R3 * sizeof(reg),
- (PT_MAX_PUT_REG + 1) * sizeof(reg));
-
- if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
- ret = user_regset_copyin_ignore(
- &pos, &count, &kbuf, &ubuf,
- (PT_MAX_PUT_REG + 1) * sizeof(reg),
- PT_TRAP * sizeof(reg));
-
- if (!ret && count > 0) {
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
- PT_TRAP * sizeof(reg),
- (PT_TRAP + 1) * sizeof(reg));
- if (!ret)
- ret = set_user_ckpt_trap(target, reg);
- }
-
- if (!ret)
- ret = user_regset_copyin_ignore(
- &pos, &count, &kbuf, &ubuf,
- (PT_TRAP + 1) * sizeof(reg), -1);
-
- return ret;
-}
-
-/**
- * tm_cfpr_active - get active number of registers in CFPR
- * @target: The target task.
- * @regset: The user regset structure.
- *
- * This function checks for the active number of available
- * regisers in transaction checkpointed FPR category.
- */
-static int tm_cfpr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return 0;
-
- return regset->n;
-}
-
-/**
- * tm_cfpr_get - get CFPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
- *
- * This function gets in transaction checkpointed FPR registers.
- *
- * When the transaction is active 'ckfp_state' holds the checkpointed
- * values for the current transaction to fall back on if it aborts
- * in between. This function gets those checkpointed FPR registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct data {
- * u64 fpr[32];
- * u64 fpscr;
- *};
- */
-static int tm_cfpr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- u64 buf[33];
- int i;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- /* copy to local buffer then write that out */
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.TS_CKFPR(i);
- buf[32] = target->thread.ckfp_state.fpscr;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
-}
-
-/**
- * tm_cfpr_set - set CFPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy into.
- * @ubuf: User buffer to copy from.
- *
- * This function sets in transaction checkpointed FPR registers.
- *
- * When the transaction is active 'ckfp_state' holds the checkpointed
- * FPR register values for the current transaction to fall back on
- * if it aborts in between. This function sets these checkpointed
- * FPR registers. The userspace interface buffer layout is as follows.
- *
- * struct data {
- * u64 fpr[32];
- * u64 fpscr;
- *};
- */
-static int tm_cfpr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- u64 buf[33];
- int i;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- for (i = 0; i < 32; i++)
- buf[i] = target->thread.TS_CKFPR(i);
- buf[32] = target->thread.ckfp_state.fpscr;
-
- /* copy to local buffer then write that out */
- i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
- if (i)
- return i;
- for (i = 0; i < 32 ; i++)
- target->thread.TS_CKFPR(i) = buf[i];
- target->thread.ckfp_state.fpscr = buf[32];
- return 0;
-}
-
-/**
- * tm_cvmx_active - get active number of registers in CVMX
- * @target: The target task.
- * @regset: The user regset structure.
- *
- * This function checks for the active number of available
- * regisers in checkpointed VMX category.
- */
-static int tm_cvmx_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return 0;
-
- return regset->n;
-}
-
-/**
- * tm_cvmx_get - get CMVX registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
- *
- * This function gets in transaction checkpointed VMX registers.
- *
- * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
- * the checkpointed values for the current transaction to fall
- * back on if it aborts in between. The userspace interface buffer
- * layout is as follows.
- *
- * struct data {
- * vector128 vr[32];
- * vector128 vscr;
- * vector128 vrsave;
- *};
- */
-static int tm_cvmx_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- /* Flush the state */
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckvr_state, 0,
- 33 * sizeof(vector128));
- if (!ret) {
- /*
- * Copy out only the low-order word of vrsave.
- */
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
- vrsave.word = target->thread.ckvrsave;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
- 33 * sizeof(vector128), -1);
- }
-
- return ret;
-}
-
-/**
- * tm_cvmx_set - set CMVX registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy into.
- * @ubuf: User buffer to copy from.
- *
- * This function sets in transaction checkpointed VMX registers.
- *
- * When the transaction is active 'ckvr_state' and 'ckvrsave' hold
- * the checkpointed values for the current transaction to fall
- * back on if it aborts in between. The userspace interface buffer
- * layout is as follows.
- *
- * struct data {
- * vector128 vr[32];
- * vector128 vscr;
- * vector128 vrsave;
- *};
- */
-static int tm_cvmx_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- BUILD_BUG_ON(TVSO(vscr) != TVSO(vr[32]));
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.ckvr_state, 0,
- 33 * sizeof(vector128));
- if (!ret && count > 0) {
- /*
- * We use only the low-order word of vrsave.
- */
- union {
- elf_vrreg_t reg;
- u32 word;
- } vrsave;
- memset(&vrsave, 0, sizeof(vrsave));
- vrsave.word = target->thread.ckvrsave;
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
- 33 * sizeof(vector128), -1);
- if (!ret)
- target->thread.ckvrsave = vrsave.word;
- }
-
- return ret;
-}
-
-/**
- * tm_cvsx_active - get active number of registers in CVSX
- * @target: The target task.
- * @regset: The user regset structure.
- *
- * This function checks for the active number of available
- * regisers in transaction checkpointed VSX category.
- */
-static int tm_cvsx_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return 0;
-
- flush_vsx_to_thread(target);
- return target->thread.used_vsr ? regset->n : 0;
-}
-
-/**
- * tm_cvsx_get - get CVSX registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
- *
- * This function gets in transaction checkpointed VSX registers.
- *
- * When the transaction is active 'ckfp_state' holds the checkpointed
- * values for the current transaction to fall back on if it aborts
- * in between. This function gets those checkpointed VSX registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct data {
- * u64 vsx[32];
- *};
- */
-static int tm_cvsx_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- u64 buf[32];
- int ret, i;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- /* Flush the state */
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
- flush_vsx_to_thread(target);
-
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
-
- return ret;
-}
-
-/**
- * tm_cvsx_set - set CFPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy into.
- * @ubuf: User buffer to copy from.
- *
- * This function sets in transaction checkpointed VSX registers.
- *
- * When the transaction is active 'ckfp_state' holds the checkpointed
- * VSX register values for the current transaction to fall back on
- * if it aborts in between. This function sets these checkpointed
- * FPR registers. The userspace interface buffer layout is as follows.
- *
- * struct data {
- * u64 vsx[32];
- *};
- */
-static int tm_cvsx_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- u64 buf[32];
- int ret, i;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- /* Flush the state */
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
- flush_vsx_to_thread(target);
-
- for (i = 0; i < 32 ; i++)
- buf[i] = target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET];
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- buf, 0, 32 * sizeof(double));
- if (!ret)
- for (i = 0; i < 32 ; i++)
- target->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
-
- return ret;
-}
-
-/**
- * tm_spr_active - get active number of registers in TM SPR
- * @target: The target task.
- * @regset: The user regset structure.
- *
- * This function checks the active number of available
- * regisers in the transactional memory SPR category.
- */
-static int tm_spr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- return regset->n;
-}
-
-/**
- * tm_spr_get - get the TM related SPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy from.
- * @ubuf: User buffer to copy into.
- *
- * This function gets transactional memory related SPR registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct {
- * u64 tm_tfhar;
- * u64 tm_texasr;
- * u64 tm_tfiar;
- * };
- */
-static int tm_spr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- /* Build tests */
- BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
- BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
- BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- /* Flush the states */
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- /* TFHAR register */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfhar, 0, sizeof(u64));
-
- /* TEXASR register */
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_texasr, sizeof(u64),
- 2 * sizeof(u64));
-
- /* TFIAR register */
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfiar,
- 2 * sizeof(u64), 3 * sizeof(u64));
- return ret;
-}
-
-/**
- * tm_spr_set - set the TM related SPR registers
- * @target: The target task.
- * @regset: The user regset structure.
- * @pos: The buffer position.
- * @count: Number of bytes to copy.
- * @kbuf: Kernel buffer to copy into.
- * @ubuf: User buffer to copy from.
- *
- * This function sets transactional memory related SPR registers.
- * The userspace interface buffer layout is as follows.
- *
- * struct {
- * u64 tm_tfhar;
- * u64 tm_texasr;
- * u64 tm_tfiar;
- * };
- */
-static int tm_spr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- /* Build tests */
- BUILD_BUG_ON(TSO(tm_tfhar) + sizeof(u64) != TSO(tm_texasr));
- BUILD_BUG_ON(TSO(tm_texasr) + sizeof(u64) != TSO(tm_tfiar));
- BUILD_BUG_ON(TSO(tm_tfiar) + sizeof(u64) != TSO(ckpt_regs));
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- /* Flush the states */
- flush_tmregs_to_thread(target);
- flush_fp_to_thread(target);
- flush_altivec_to_thread(target);
-
- /* TFHAR register */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfhar, 0, sizeof(u64));
-
- /* TEXASR register */
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_texasr, sizeof(u64),
- 2 * sizeof(u64));
-
- /* TFIAR register */
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tfiar,
- 2 * sizeof(u64), 3 * sizeof(u64));
- return ret;
-}
-
-static int tm_tar_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (MSR_TM_ACTIVE(target->thread.regs->msr))
- return regset->n;
-
- return 0;
-}
-
-static int tm_tar_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tar, 0, sizeof(u64));
- return ret;
-}
-
-static int tm_tar_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_tar, 0, sizeof(u64));
- return ret;
-}
-
-static int tm_ppr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (MSR_TM_ACTIVE(target->thread.regs->msr))
- return regset->n;
-
- return 0;
-}
-
-
-static int tm_ppr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_ppr, 0, sizeof(u64));
- return ret;
-}
-
-static int tm_ppr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_ppr, 0, sizeof(u64));
- return ret;
-}
-
-static int tm_dscr_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (MSR_TM_ACTIVE(target->thread.regs->msr))
- return regset->n;
-
- return 0;
-}
-
-static int tm_dscr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_dscr, 0, sizeof(u64));
- return ret;
-}
-
-static int tm_dscr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- if (!cpu_has_feature(CPU_FTR_TM))
- return -ENODEV;
-
- if (!MSR_TM_ACTIVE(target->thread.regs->msr))
- return -ENODATA;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tm_dscr, 0, sizeof(u64));
- return ret;
-}
-#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
-
-#ifdef CONFIG_PPC64
-static int ppr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->ppr, 0, sizeof(u64));
-}
-
-static int ppr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.regs->ppr, 0, sizeof(u64));
-}
-
-static int dscr_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.dscr, 0, sizeof(u64));
-}
-static int dscr_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.dscr, 0, sizeof(u64));
-}
-#endif
-#ifdef CONFIG_PPC_BOOK3S_64
-static int tar_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.tar, 0, sizeof(u64));
-}
-static int tar_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.tar, 0, sizeof(u64));
-}
-
-static int ebb_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- if (target->thread.used_ebb)
- return regset->n;
-
- return 0;
-}
-
-static int ebb_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- /* Build tests */
- BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
- BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
-
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- if (!target->thread.used_ebb)
- return -ENODATA;
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.ebbrr, 0, 3 * sizeof(unsigned long));
-}
-
-static int ebb_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret = 0;
-
- /* Build tests */
- BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
- BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
-
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- if (target->thread.used_ebb)
- return -ENODATA;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.ebbrr, 0, sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.ebbhr, sizeof(unsigned long),
- 2 * sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.bescr,
- 2 * sizeof(unsigned long), 3 * sizeof(unsigned long));
-
- return ret;
-}
-static int pmu_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- return regset->n;
-}
-
-static int pmu_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- /* Build tests */
- BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
- BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
- BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
- BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
-
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.siar, 0,
- 5 * sizeof(unsigned long));
-}
-
-static int pmu_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret = 0;
-
- /* Build tests */
- BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
- BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
- BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
- BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
-
- if (!cpu_has_feature(CPU_FTR_ARCH_207S))
- return -ENODEV;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.siar, 0,
- sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.sdar, sizeof(unsigned long),
- 2 * sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.sier, 2 * sizeof(unsigned long),
- 3 * sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.mmcr2, 3 * sizeof(unsigned long),
- 4 * sizeof(unsigned long));
-
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &target->thread.mmcr0, 4 * sizeof(unsigned long),
- 5 * sizeof(unsigned long));
- return ret;
-}
-#endif
-
-#ifdef CONFIG_PPC_MEM_KEYS
-static int pkey_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- if (!arch_pkeys_enabled())
- return -ENODEV;
-
- return regset->n;
-}
-
-static int pkey_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- BUILD_BUG_ON(TSO(amr) + sizeof(unsigned long) != TSO(iamr));
- BUILD_BUG_ON(TSO(iamr) + sizeof(unsigned long) != TSO(uamor));
-
- if (!arch_pkeys_enabled())
- return -ENODEV;
-
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &target->thread.amr, 0,
- ELF_NPKEY * sizeof(unsigned long));
-}
-
-static int pkey_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- u64 new_amr;
- int ret;
-
- if (!arch_pkeys_enabled())
- return -ENODEV;
-
- /* Only the AMR can be set from userspace */
- if (pos != 0 || count != sizeof(new_amr))
- return -EINVAL;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &new_amr, 0, sizeof(new_amr));
- if (ret)
- return ret;
-
- /* UAMOR determines which bits of the AMR can be set from userspace. */
- target->thread.amr = (new_amr & target->thread.uamor) |
- (target->thread.amr & ~target->thread.uamor);
-
- return 0;
-}
-#endif /* CONFIG_PPC_MEM_KEYS */
-
-/*
- * These are our native regset flavors.
- */
-enum powerpc_regset {
- REGSET_GPR,
- REGSET_FPR,
-#ifdef CONFIG_ALTIVEC
- REGSET_VMX,
-#endif
-#ifdef CONFIG_VSX
- REGSET_VSX,
-#endif
-#ifdef CONFIG_SPE
- REGSET_SPE,
-#endif
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- REGSET_TM_CGPR, /* TM checkpointed GPR registers */
- REGSET_TM_CFPR, /* TM checkpointed FPR registers */
- REGSET_TM_CVMX, /* TM checkpointed VMX registers */
- REGSET_TM_CVSX, /* TM checkpointed VSX registers */
- REGSET_TM_SPR, /* TM specific SPR registers */
- REGSET_TM_CTAR, /* TM checkpointed TAR register */
- REGSET_TM_CPPR, /* TM checkpointed PPR register */
- REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
-#endif
-#ifdef CONFIG_PPC64
- REGSET_PPR, /* PPR register */
- REGSET_DSCR, /* DSCR register */
-#endif
-#ifdef CONFIG_PPC_BOOK3S_64
- REGSET_TAR, /* TAR register */
- REGSET_EBB, /* EBB registers */
- REGSET_PMR, /* Performance Monitor Registers */
-#endif
-#ifdef CONFIG_PPC_MEM_KEYS
- REGSET_PKEY, /* AMR register */
-#endif
-};
-
-static const struct user_regset native_regsets[] = {
- [REGSET_GPR] = {
- .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
- .size = sizeof(long), .align = sizeof(long),
- .get = gpr_get, .set = gpr_set
- },
- [REGSET_FPR] = {
- .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
- .size = sizeof(double), .align = sizeof(double),
- .get = fpr_get, .set = fpr_set
- },
-#ifdef CONFIG_ALTIVEC
- [REGSET_VMX] = {
- .core_note_type = NT_PPC_VMX, .n = 34,
- .size = sizeof(vector128), .align = sizeof(vector128),
- .active = vr_active, .get = vr_get, .set = vr_set
- },
-#endif
-#ifdef CONFIG_VSX
- [REGSET_VSX] = {
- .core_note_type = NT_PPC_VSX, .n = 32,
- .size = sizeof(double), .align = sizeof(double),
- .active = vsr_active, .get = vsr_get, .set = vsr_set
- },
-#endif
-#ifdef CONFIG_SPE
- [REGSET_SPE] = {
- .core_note_type = NT_PPC_SPE, .n = 35,
- .size = sizeof(u32), .align = sizeof(u32),
- .active = evr_active, .get = evr_get, .set = evr_set
- },
-#endif
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- [REGSET_TM_CGPR] = {
- .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
- .size = sizeof(long), .align = sizeof(long),
- .active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
- },
- [REGSET_TM_CFPR] = {
- .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
- .size = sizeof(double), .align = sizeof(double),
- .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
- },
- [REGSET_TM_CVMX] = {
- .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
- .size = sizeof(vector128), .align = sizeof(vector128),
- .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
- },
- [REGSET_TM_CVSX] = {
- .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
- .size = sizeof(double), .align = sizeof(double),
- .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
- },
- [REGSET_TM_SPR] = {
- .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
- },
- [REGSET_TM_CTAR] = {
- .core_note_type = NT_PPC_TM_CTAR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
- },
- [REGSET_TM_CPPR] = {
- .core_note_type = NT_PPC_TM_CPPR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
- },
- [REGSET_TM_CDSCR] = {
- .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
- },
-#endif
-#ifdef CONFIG_PPC64
- [REGSET_PPR] = {
- .core_note_type = NT_PPC_PPR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = ppr_get, .set = ppr_set
- },
- [REGSET_DSCR] = {
- .core_note_type = NT_PPC_DSCR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = dscr_get, .set = dscr_set
- },
-#endif
-#ifdef CONFIG_PPC_BOOK3S_64
- [REGSET_TAR] = {
- .core_note_type = NT_PPC_TAR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = tar_get, .set = tar_set
- },
- [REGSET_EBB] = {
- .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = ebb_active, .get = ebb_get, .set = ebb_set
- },
- [REGSET_PMR] = {
- .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = pmu_active, .get = pmu_get, .set = pmu_set
- },
-#endif
-#ifdef CONFIG_PPC_MEM_KEYS
- [REGSET_PKEY] = {
- .core_note_type = NT_PPC_PKEY, .n = ELF_NPKEY,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = pkey_active, .get = pkey_get, .set = pkey_set
- },
-#endif
-};
-
-static const struct user_regset_view user_ppc_native_view = {
- .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
- .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
-};
-
-#ifdef CONFIG_PPC64
-#include <linux/compat.h>
-
-static int gpr32_get_common(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf,
- unsigned long *regs)
-{
- compat_ulong_t *k = kbuf;
- compat_ulong_t __user *u = ubuf;
- compat_ulong_t reg;
-
- pos /= sizeof(reg);
- count /= sizeof(reg);
-
- if (kbuf)
- for (; count > 0 && pos < PT_MSR; --count)
- *k++ = regs[pos++];
- else
- for (; count > 0 && pos < PT_MSR; --count)
- if (__put_user((compat_ulong_t) regs[pos++], u++))
- return -EFAULT;
-
- if (count > 0 && pos == PT_MSR) {
- reg = get_user_msr(target);
- if (kbuf)
- *k++ = reg;
- else if (__put_user(reg, u++))
- return -EFAULT;
- ++pos;
- --count;
- }
-
- if (kbuf)
- for (; count > 0 && pos < PT_REGS_COUNT; --count)
- *k++ = regs[pos++];
- else
- for (; count > 0 && pos < PT_REGS_COUNT; --count)
- if (__put_user((compat_ulong_t) regs[pos++], u++))
- return -EFAULT;
-
- kbuf = k;
- ubuf = u;
- pos *= sizeof(reg);
- count *= sizeof(reg);
- return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- PT_REGS_COUNT * sizeof(reg), -1);
-}
-
-static int gpr32_set_common(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf,
- unsigned long *regs)
-{
- const compat_ulong_t *k = kbuf;
- const compat_ulong_t __user *u = ubuf;
- compat_ulong_t reg;
-
- pos /= sizeof(reg);
- count /= sizeof(reg);
-
- if (kbuf)
- for (; count > 0 && pos < PT_MSR; --count)
- regs[pos++] = *k++;
- else
- for (; count > 0 && pos < PT_MSR; --count) {
- if (__get_user(reg, u++))
- return -EFAULT;
- regs[pos++] = reg;
- }
-
-
- if (count > 0 && pos == PT_MSR) {
- if (kbuf)
- reg = *k++;
- else if (__get_user(reg, u++))
- return -EFAULT;
- set_user_msr(target, reg);
- ++pos;
- --count;
- }
-
- if (kbuf) {
- for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
- regs[pos++] = *k++;
- for (; count > 0 && pos < PT_TRAP; --count, ++pos)
- ++k;
- } else {
- for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
- if (__get_user(reg, u++))
- return -EFAULT;
- regs[pos++] = reg;
- }
- for (; count > 0 && pos < PT_TRAP; --count, ++pos)
- if (__get_user(reg, u++))
- return -EFAULT;
- }
-
- if (count > 0 && pos == PT_TRAP) {
- if (kbuf)
- reg = *k++;
- else if (__get_user(reg, u++))
- return -EFAULT;
- set_user_trap(target, reg);
- ++pos;
- --count;
- }
-
- kbuf = k;
- ubuf = u;
- pos *= sizeof(reg);
- count *= sizeof(reg);
- return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- (PT_TRAP + 1) * sizeof(reg), -1);
-}
-
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-static int tm_cgpr32_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
- &target->thread.ckpt_regs.gpr[0]);
-}
-
-static int tm_cgpr32_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
- &target->thread.ckpt_regs.gpr[0]);
-}
-#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
-
-static int gpr32_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int i;
-
- if (target->thread.regs == NULL)
- return -EIO;
-
- if (!FULL_REGS(target->thread.regs)) {
- /*
- * We have a partial register set.
- * Fill 14-31 with bogus values.
- */
- for (i = 14; i < 32; i++)
- target->thread.regs->gpr[i] = NV_REG_POISON;
- }
- return gpr32_get_common(target, regset, pos, count, kbuf, ubuf,
- &target->thread.regs->gpr[0]);
-}
-
-static int gpr32_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- if (target->thread.regs == NULL)
- return -EIO;
-
- CHECK_FULL_REGS(target->thread.regs);
- return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
- &target->thread.regs->gpr[0]);
-}
-
-/*
- * These are the regset flavors matching the CONFIG_PPC32 native set.
- */
-static const struct user_regset compat_regsets[] = {
- [REGSET_GPR] = {
- .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
- .size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
- .get = gpr32_get, .set = gpr32_set
- },
- [REGSET_FPR] = {
- .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
- .size = sizeof(double), .align = sizeof(double),
- .get = fpr_get, .set = fpr_set
- },
-#ifdef CONFIG_ALTIVEC
- [REGSET_VMX] = {
- .core_note_type = NT_PPC_VMX, .n = 34,
- .size = sizeof(vector128), .align = sizeof(vector128),
- .active = vr_active, .get = vr_get, .set = vr_set
- },
-#endif
-#ifdef CONFIG_SPE
- [REGSET_SPE] = {
- .core_note_type = NT_PPC_SPE, .n = 35,
- .size = sizeof(u32), .align = sizeof(u32),
- .active = evr_active, .get = evr_get, .set = evr_set
- },
-#endif
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- [REGSET_TM_CGPR] = {
- .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
- .size = sizeof(long), .align = sizeof(long),
- .active = tm_cgpr_active,
- .get = tm_cgpr32_get, .set = tm_cgpr32_set
- },
- [REGSET_TM_CFPR] = {
- .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
- .size = sizeof(double), .align = sizeof(double),
- .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
- },
- [REGSET_TM_CVMX] = {
- .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
- .size = sizeof(vector128), .align = sizeof(vector128),
- .active = tm_cvmx_active, .get = tm_cvmx_get, .set = tm_cvmx_set
- },
- [REGSET_TM_CVSX] = {
- .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
- .size = sizeof(double), .align = sizeof(double),
- .active = tm_cvsx_active, .get = tm_cvsx_get, .set = tm_cvsx_set
- },
- [REGSET_TM_SPR] = {
- .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_spr_active, .get = tm_spr_get, .set = tm_spr_set
- },
- [REGSET_TM_CTAR] = {
- .core_note_type = NT_PPC_TM_CTAR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_tar_active, .get = tm_tar_get, .set = tm_tar_set
- },
- [REGSET_TM_CPPR] = {
- .core_note_type = NT_PPC_TM_CPPR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_ppr_active, .get = tm_ppr_get, .set = tm_ppr_set
- },
- [REGSET_TM_CDSCR] = {
- .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
- },
-#endif
-#ifdef CONFIG_PPC64
- [REGSET_PPR] = {
- .core_note_type = NT_PPC_PPR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = ppr_get, .set = ppr_set
- },
- [REGSET_DSCR] = {
- .core_note_type = NT_PPC_DSCR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = dscr_get, .set = dscr_set
- },
-#endif
-#ifdef CONFIG_PPC_BOOK3S_64
- [REGSET_TAR] = {
- .core_note_type = NT_PPC_TAR, .n = 1,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = tar_get, .set = tar_set
- },
- [REGSET_EBB] = {
- .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
- .size = sizeof(u64), .align = sizeof(u64),
- .active = ebb_active, .get = ebb_get, .set = ebb_set
- },
-#endif
-};
-
-static const struct user_regset_view user_ppc_compat_view = {
- .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI,
- .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets)
-};
-#endif /* CONFIG_PPC64 */
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
-#ifdef CONFIG_PPC64
- if (test_tsk_thread_flag(task, TIF_32BIT))
- return &user_ppc_compat_view;
-#endif
- return &user_ppc_native_view;
-}
-
-
-void user_enable_single_step(struct task_struct *task)
-{
- struct pt_regs *regs = task->thread.regs;
-
- if (regs != NULL) {
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- task->thread.debug.dbcr0 &= ~DBCR0_BT;
- task->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;
- regs->msr |= MSR_DE;
-#else
- regs->msr &= ~MSR_BE;
- regs->msr |= MSR_SE;
-#endif
- }
- set_tsk_thread_flag(task, TIF_SINGLESTEP);
-}
-
-void user_enable_block_step(struct task_struct *task)
-{
- struct pt_regs *regs = task->thread.regs;
-
- if (regs != NULL) {
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- task->thread.debug.dbcr0 &= ~DBCR0_IC;
- task->thread.debug.dbcr0 = DBCR0_IDM | DBCR0_BT;
- regs->msr |= MSR_DE;
-#else
- regs->msr &= ~MSR_SE;
- regs->msr |= MSR_BE;
-#endif
- }
- set_tsk_thread_flag(task, TIF_SINGLESTEP);
-}
-
-void user_disable_single_step(struct task_struct *task)
-{
- struct pt_regs *regs = task->thread.regs;
-
- if (regs != NULL) {
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- /*
- * The logic to disable single stepping should be as
- * simple as turning off the Instruction Complete flag.
- * And, after doing so, if all debug flags are off, turn
- * off DBCR0(IDM) and MSR(DE) .... Torez
- */
- task->thread.debug.dbcr0 &= ~(DBCR0_IC|DBCR0_BT);
- /*
- * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.
- */
- if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
- task->thread.debug.dbcr1)) {
- /*
- * All debug events were off.....
- */
- task->thread.debug.dbcr0 &= ~DBCR0_IDM;
- regs->msr &= ~MSR_DE;
- }
-#else
- regs->msr &= ~(MSR_SE | MSR_BE);
-#endif
- }
- clear_tsk_thread_flag(task, TIF_SINGLESTEP);
-}
-
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
-void ptrace_triggered(struct perf_event *bp,
- struct perf_sample_data *data, struct pt_regs *regs)
-{
- struct perf_event_attr attr;
-
- /*
- * Disable the breakpoint request here since ptrace has defined a
- * one-shot behaviour for breakpoint exceptions in PPC64.
- * The SIGTRAP signal is generated automatically for us in do_dabr().
- * We don't have to do anything about that here
- */
- attr = bp->attr;
- attr.disabled = true;
- modify_user_hw_breakpoint(bp, &attr);
-}
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-
-static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
- unsigned long data)
-{
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- int ret;
- struct thread_struct *thread = &(task->thread);
- struct perf_event *bp;
- struct perf_event_attr attr;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-#ifndef CONFIG_PPC_ADV_DEBUG_REGS
- bool set_bp = true;
- struct arch_hw_breakpoint hw_brk;
-#endif
-
- /* For ppc64 we support one DABR and no IABR's at the moment (ppc64).
- * For embedded processors we support one DAC and no IAC's at the
- * moment.
- */
- if (addr > 0)
- return -EINVAL;
-
- /* The bottom 3 bits in dabr are flags */
- if ((data & ~0x7UL) >= TASK_SIZE)
- return -EIO;
-
-#ifndef CONFIG_PPC_ADV_DEBUG_REGS
- /* For processors using DABR (i.e. 970), the bottom 3 bits are flags.
- * It was assumed, on previous implementations, that 3 bits were
- * passed together with the data address, fitting the design of the
- * DABR register, as follows:
- *
- * bit 0: Read flag
- * bit 1: Write flag
- * bit 2: Breakpoint translation
- *
- * Thus, we use them here as so.
- */
-
- /* Ensure breakpoint translation bit is set */
- if (data && !(data & HW_BRK_TYPE_TRANSLATE))
- return -EIO;
- hw_brk.address = data & (~HW_BRK_TYPE_DABR);
- hw_brk.type = (data & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
- hw_brk.len = DABR_MAX_LEN;
- hw_brk.hw_len = DABR_MAX_LEN;
- set_bp = (data) && (hw_brk.type & HW_BRK_TYPE_RDWR);
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- bp = thread->ptrace_bps[0];
- if (!set_bp) {
- if (bp) {
- unregister_hw_breakpoint(bp);
- thread->ptrace_bps[0] = NULL;
- }
- return 0;
- }
- if (bp) {
- attr = bp->attr;
- attr.bp_addr = hw_brk.address;
- attr.bp_len = DABR_MAX_LEN;
- arch_bp_generic_fields(hw_brk.type, &attr.bp_type);
-
- /* Enable breakpoint */
- attr.disabled = false;
-
- ret = modify_user_hw_breakpoint(bp, &attr);
- if (ret) {
- return ret;
- }
- thread->ptrace_bps[0] = bp;
- thread->hw_brk = hw_brk;
- return 0;
- }
-
- /* Create a new breakpoint request if one doesn't exist already */
- hw_breakpoint_init(&attr);
- attr.bp_addr = hw_brk.address;
- attr.bp_len = DABR_MAX_LEN;
- arch_bp_generic_fields(hw_brk.type,
- &attr.bp_type);
-
- thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
- ptrace_triggered, NULL, task);
- if (IS_ERR(bp)) {
- thread->ptrace_bps[0] = NULL;
- return PTR_ERR(bp);
- }
-
-#else /* !CONFIG_HAVE_HW_BREAKPOINT */
- if (set_bp && (!ppc_breakpoint_available()))
- return -ENODEV;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
- task->thread.hw_brk = hw_brk;
-#else /* CONFIG_PPC_ADV_DEBUG_REGS */
- /* As described above, it was assumed 3 bits were passed with the data
- * address, but we will assume only the mode bits will be passed
- * as to not cause alignment restrictions for DAC-based processors.
- */
-
- /* DAC's hold the whole address without any mode flags */
- task->thread.debug.dac1 = data & ~0x3UL;
-
- if (task->thread.debug.dac1 == 0) {
- dbcr_dac(task) &= ~(DBCR_DAC1R | DBCR_DAC1W);
- if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
- task->thread.debug.dbcr1)) {
- task->thread.regs->msr &= ~MSR_DE;
- task->thread.debug.dbcr0 &= ~DBCR0_IDM;
- }
- return 0;
- }
-
- /* Read or Write bits must be set */
-
- if (!(data & 0x3UL))
- return -EINVAL;
-
- /* Set the Internal Debugging flag (IDM bit 1) for the DBCR0
- register */
- task->thread.debug.dbcr0 |= DBCR0_IDM;
-
- /* Check for write and read flags and set DBCR0
- accordingly */
- dbcr_dac(task) &= ~(DBCR_DAC1R|DBCR_DAC1W);
- if (data & 0x1UL)
- dbcr_dac(task) |= DBCR_DAC1R;
- if (data & 0x2UL)
- dbcr_dac(task) |= DBCR_DAC1W;
- task->thread.regs->msr |= MSR_DE;
-#endif /* CONFIG_PPC_ADV_DEBUG_REGS */
- return 0;
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* make sure the single step bit is not set. */
- user_disable_single_step(child);
-}
-
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
-static long set_instruction_bp(struct task_struct *child,
- struct ppc_hw_breakpoint *bp_info)
-{
- int slot;
- int slot1_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC1) != 0);
- int slot2_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC2) != 0);
- int slot3_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC3) != 0);
- int slot4_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC4) != 0);
-
- if (dbcr_iac_range(child) & DBCR_IAC12MODE)
- slot2_in_use = 1;
- if (dbcr_iac_range(child) & DBCR_IAC34MODE)
- slot4_in_use = 1;
-
- if (bp_info->addr >= TASK_SIZE)
- return -EIO;
-
- if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT) {
-
- /* Make sure range is valid. */
- if (bp_info->addr2 >= TASK_SIZE)
- return -EIO;
-
- /* We need a pair of IAC regsisters */
- if ((!slot1_in_use) && (!slot2_in_use)) {
- slot = 1;
- child->thread.debug.iac1 = bp_info->addr;
- child->thread.debug.iac2 = bp_info->addr2;
- child->thread.debug.dbcr0 |= DBCR0_IAC1;
- if (bp_info->addr_mode ==
- PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
- dbcr_iac_range(child) |= DBCR_IAC12X;
- else
- dbcr_iac_range(child) |= DBCR_IAC12I;
-#if CONFIG_PPC_ADV_DEBUG_IACS > 2
- } else if ((!slot3_in_use) && (!slot4_in_use)) {
- slot = 3;
- child->thread.debug.iac3 = bp_info->addr;
- child->thread.debug.iac4 = bp_info->addr2;
- child->thread.debug.dbcr0 |= DBCR0_IAC3;
- if (bp_info->addr_mode ==
- PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
- dbcr_iac_range(child) |= DBCR_IAC34X;
- else
- dbcr_iac_range(child) |= DBCR_IAC34I;
-#endif
- } else
- return -ENOSPC;
- } else {
- /* We only need one. If possible leave a pair free in
- * case a range is needed later
- */
- if (!slot1_in_use) {
- /*
- * Don't use iac1 if iac1-iac2 are free and either
- * iac3 or iac4 (but not both) are free
- */
- if (slot2_in_use || (slot3_in_use == slot4_in_use)) {
- slot = 1;
- child->thread.debug.iac1 = bp_info->addr;
- child->thread.debug.dbcr0 |= DBCR0_IAC1;
- goto out;
- }
- }
- if (!slot2_in_use) {
- slot = 2;
- child->thread.debug.iac2 = bp_info->addr;
- child->thread.debug.dbcr0 |= DBCR0_IAC2;
-#if CONFIG_PPC_ADV_DEBUG_IACS > 2
- } else if (!slot3_in_use) {
- slot = 3;
- child->thread.debug.iac3 = bp_info->addr;
- child->thread.debug.dbcr0 |= DBCR0_IAC3;
- } else if (!slot4_in_use) {
- slot = 4;
- child->thread.debug.iac4 = bp_info->addr;
- child->thread.debug.dbcr0 |= DBCR0_IAC4;
-#endif
- } else
- return -ENOSPC;
- }
-out:
- child->thread.debug.dbcr0 |= DBCR0_IDM;
- child->thread.regs->msr |= MSR_DE;
-
- return slot;
-}
-
-static int del_instruction_bp(struct task_struct *child, int slot)
-{
- switch (slot) {
- case 1:
- if ((child->thread.debug.dbcr0 & DBCR0_IAC1) == 0)
- return -ENOENT;
-
- if (dbcr_iac_range(child) & DBCR_IAC12MODE) {
- /* address range - clear slots 1 & 2 */
- child->thread.debug.iac2 = 0;
- dbcr_iac_range(child) &= ~DBCR_IAC12MODE;
- }
- child->thread.debug.iac1 = 0;
- child->thread.debug.dbcr0 &= ~DBCR0_IAC1;
- break;
- case 2:
- if ((child->thread.debug.dbcr0 & DBCR0_IAC2) == 0)
- return -ENOENT;
-
- if (dbcr_iac_range(child) & DBCR_IAC12MODE)
- /* used in a range */
- return -EINVAL;
- child->thread.debug.iac2 = 0;
- child->thread.debug.dbcr0 &= ~DBCR0_IAC2;
- break;
-#if CONFIG_PPC_ADV_DEBUG_IACS > 2
- case 3:
- if ((child->thread.debug.dbcr0 & DBCR0_IAC3) == 0)
- return -ENOENT;
-
- if (dbcr_iac_range(child) & DBCR_IAC34MODE) {
- /* address range - clear slots 3 & 4 */
- child->thread.debug.iac4 = 0;
- dbcr_iac_range(child) &= ~DBCR_IAC34MODE;
- }
- child->thread.debug.iac3 = 0;
- child->thread.debug.dbcr0 &= ~DBCR0_IAC3;
- break;
- case 4:
- if ((child->thread.debug.dbcr0 & DBCR0_IAC4) == 0)
- return -ENOENT;
-
- if (dbcr_iac_range(child) & DBCR_IAC34MODE)
- /* Used in a range */
- return -EINVAL;
- child->thread.debug.iac4 = 0;
- child->thread.debug.dbcr0 &= ~DBCR0_IAC4;
- break;
-#endif
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info)
-{
- int byte_enable =
- (bp_info->condition_mode >> PPC_BREAKPOINT_CONDITION_BE_SHIFT)
- & 0xf;
- int condition_mode =
- bp_info->condition_mode & PPC_BREAKPOINT_CONDITION_MODE;
- int slot;
-
- if (byte_enable && (condition_mode == 0))
- return -EINVAL;
-
- if (bp_info->addr >= TASK_SIZE)
- return -EIO;
-
- if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0) {
- slot = 1;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
- dbcr_dac(child) |= DBCR_DAC1R;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
- dbcr_dac(child) |= DBCR_DAC1W;
- child->thread.debug.dac1 = (unsigned long)bp_info->addr;
-#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
- if (byte_enable) {
- child->thread.debug.dvc1 =
- (unsigned long)bp_info->condition_value;
- child->thread.debug.dbcr2 |=
- ((byte_enable << DBCR2_DVC1BE_SHIFT) |
- (condition_mode << DBCR2_DVC1M_SHIFT));
- }
-#endif
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
- } else if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
- /* Both dac1 and dac2 are part of a range */
- return -ENOSPC;
-#endif
- } else if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0) {
- slot = 2;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
- dbcr_dac(child) |= DBCR_DAC2R;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
- dbcr_dac(child) |= DBCR_DAC2W;
- child->thread.debug.dac2 = (unsigned long)bp_info->addr;
-#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
- if (byte_enable) {
- child->thread.debug.dvc2 =
- (unsigned long)bp_info->condition_value;
- child->thread.debug.dbcr2 |=
- ((byte_enable << DBCR2_DVC2BE_SHIFT) |
- (condition_mode << DBCR2_DVC2M_SHIFT));
- }
-#endif
- } else
- return -ENOSPC;
- child->thread.debug.dbcr0 |= DBCR0_IDM;
- child->thread.regs->msr |= MSR_DE;
-
- return slot + 4;
-}
-
-static int del_dac(struct task_struct *child, int slot)
-{
- if (slot == 1) {
- if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0)
- return -ENOENT;
-
- child->thread.debug.dac1 = 0;
- dbcr_dac(child) &= ~(DBCR_DAC1R | DBCR_DAC1W);
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
- if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
- child->thread.debug.dac2 = 0;
- child->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;
- }
- child->thread.debug.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);
-#endif
-#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
- child->thread.debug.dvc1 = 0;
-#endif
- } else if (slot == 2) {
- if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0)
- return -ENOENT;
-
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
- if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE)
- /* Part of a range */
- return -EINVAL;
- child->thread.debug.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);
-#endif
-#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
- child->thread.debug.dvc2 = 0;
-#endif
- child->thread.debug.dac2 = 0;
- dbcr_dac(child) &= ~(DBCR_DAC2R | DBCR_DAC2W);
- } else
- return -EINVAL;
-
- return 0;
-}
-#endif /* CONFIG_PPC_ADV_DEBUG_REGS */
-
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
-static int set_dac_range(struct task_struct *child,
- struct ppc_hw_breakpoint *bp_info)
-{
- int mode = bp_info->addr_mode & PPC_BREAKPOINT_MODE_MASK;
-
- /* We don't allow range watchpoints to be used with DVC */
- if (bp_info->condition_mode)
- return -EINVAL;
-
- /*
- * Best effort to verify the address range. The user/supervisor bits
- * prevent trapping in kernel space, but let's fail on an obvious bad
- * range. The simple test on the mask is not fool-proof, and any
- * exclusive range will spill over into kernel space.
- */
- if (bp_info->addr >= TASK_SIZE)
- return -EIO;
- if (mode == PPC_BREAKPOINT_MODE_MASK) {
- /*
- * dac2 is a bitmask. Don't allow a mask that makes a
- * kernel space address from a valid dac1 value
- */
- if (~((unsigned long)bp_info->addr2) >= TASK_SIZE)
- return -EIO;
- } else {
- /*
- * For range breakpoints, addr2 must also be a valid address
- */
- if (bp_info->addr2 >= TASK_SIZE)
- return -EIO;
- }
-
- if (child->thread.debug.dbcr0 &
- (DBCR0_DAC1R | DBCR0_DAC1W | DBCR0_DAC2R | DBCR0_DAC2W))
- return -ENOSPC;
-
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
- child->thread.debug.dbcr0 |= (DBCR0_DAC1R | DBCR0_IDM);
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
- child->thread.debug.dbcr0 |= (DBCR0_DAC1W | DBCR0_IDM);
- child->thread.debug.dac1 = bp_info->addr;
- child->thread.debug.dac2 = bp_info->addr2;
- if (mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
- child->thread.debug.dbcr2 |= DBCR2_DAC12M;
- else if (mode == PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)
- child->thread.debug.dbcr2 |= DBCR2_DAC12MX;
- else /* PPC_BREAKPOINT_MODE_MASK */
- child->thread.debug.dbcr2 |= DBCR2_DAC12MM;
- child->thread.regs->msr |= MSR_DE;
-
- return 5;
-}
-#endif /* CONFIG_PPC_ADV_DEBUG_DAC_RANGE */
-
-static long ppc_set_hwdebug(struct task_struct *child,
- struct ppc_hw_breakpoint *bp_info)
-{
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- int len = 0;
- struct thread_struct *thread = &(child->thread);
- struct perf_event *bp;
- struct perf_event_attr attr;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-#ifndef CONFIG_PPC_ADV_DEBUG_REGS
- struct arch_hw_breakpoint brk;
-#endif
-
- if (bp_info->version != 1)
- return -ENOTSUPP;
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- /*
- * Check for invalid flags and combinations
- */
- if ((bp_info->trigger_type == 0) ||
- (bp_info->trigger_type & ~(PPC_BREAKPOINT_TRIGGER_EXECUTE |
- PPC_BREAKPOINT_TRIGGER_RW)) ||
- (bp_info->addr_mode & ~PPC_BREAKPOINT_MODE_MASK) ||
- (bp_info->condition_mode &
- ~(PPC_BREAKPOINT_CONDITION_MODE |
- PPC_BREAKPOINT_CONDITION_BE_ALL)))
- return -EINVAL;
-#if CONFIG_PPC_ADV_DEBUG_DVCS == 0
- if (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
- return -EINVAL;
-#endif
-
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_EXECUTE) {
- if ((bp_info->trigger_type != PPC_BREAKPOINT_TRIGGER_EXECUTE) ||
- (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE))
- return -EINVAL;
- return set_instruction_bp(child, bp_info);
- }
- if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
- return set_dac(child, bp_info);
-
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
- return set_dac_range(child, bp_info);
-#else
- return -EINVAL;
-#endif
-#else /* !CONFIG_PPC_ADV_DEBUG_DVCS */
- /*
- * We only support one data breakpoint
- */
- if ((bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_RW) == 0 ||
- (bp_info->trigger_type & ~PPC_BREAKPOINT_TRIGGER_RW) != 0 ||
- bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)
- return -EINVAL;
-
- if ((unsigned long)bp_info->addr >= TASK_SIZE)
- return -EIO;
-
- brk.address = bp_info->addr & ~HW_BREAKPOINT_ALIGN;
- brk.type = HW_BRK_TYPE_TRANSLATE;
- brk.len = DABR_MAX_LEN;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
- brk.type |= HW_BRK_TYPE_READ;
- if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
- brk.type |= HW_BRK_TYPE_WRITE;
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
- len = bp_info->addr2 - bp_info->addr;
- else if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
- len = 1;
- else
- return -EINVAL;
- bp = thread->ptrace_bps[0];
- if (bp)
- return -ENOSPC;
-
- /* Create a new breakpoint request if one doesn't exist already */
- hw_breakpoint_init(&attr);
- attr.bp_addr = (unsigned long)bp_info->addr;
- attr.bp_len = len;
- arch_bp_generic_fields(brk.type, &attr.bp_type);
-
- thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr,
- ptrace_triggered, NULL, child);
- if (IS_ERR(bp)) {
- thread->ptrace_bps[0] = NULL;
- return PTR_ERR(bp);
- }
-
- return 1;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-
- if (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT)
- return -EINVAL;
-
- if (child->thread.hw_brk.address)
- return -ENOSPC;
-
- if (!ppc_breakpoint_available())
- return -ENODEV;
-
- child->thread.hw_brk = brk;
-
- return 1;
-#endif /* !CONFIG_PPC_ADV_DEBUG_DVCS */
-}
-
-static long ppc_del_hwdebug(struct task_struct *child, long data)
-{
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- int ret = 0;
- struct thread_struct *thread = &(child->thread);
- struct perf_event *bp;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- int rc;
-
- if (data <= 4)
- rc = del_instruction_bp(child, (int)data);
- else
- rc = del_dac(child, (int)data - 4);
-
- if (!rc) {
- if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0,
- child->thread.debug.dbcr1)) {
- child->thread.debug.dbcr0 &= ~DBCR0_IDM;
- child->thread.regs->msr &= ~MSR_DE;
- }
- }
- return rc;
-#else
- if (data != 1)
- return -EINVAL;
-
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- bp = thread->ptrace_bps[0];
- if (bp) {
- unregister_hw_breakpoint(bp);
- thread->ptrace_bps[0] = NULL;
- } else
- ret = -ENOENT;
- return ret;
-#else /* CONFIG_HAVE_HW_BREAKPOINT */
- if (child->thread.hw_brk.address == 0)
- return -ENOENT;
-
- child->thread.hw_brk.address = 0;
- child->thread.hw_brk.type = 0;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-
- return 0;
-#endif
-}
-
-long arch_ptrace(struct task_struct *child, long request,
- unsigned long addr, unsigned long data)
-{
- int ret = -EPERM;
- void __user *datavp = (void __user *) data;
- unsigned long __user *datalp = datavp;
-
- switch (request) {
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR: {
- unsigned long index, tmp;
-
- ret = -EIO;
- /* convert to index and check */
-#ifdef CONFIG_PPC32
- index = addr >> 2;
- if ((addr & 3) || (index > PT_FPSCR)
- || (child->thread.regs == NULL))
-#else
- index = addr >> 3;
- if ((addr & 7) || (index > PT_FPSCR))
-#endif
- break;
-
- CHECK_FULL_REGS(child->thread.regs);
- if (index < PT_FPR0) {
- ret = ptrace_get_reg(child, (int) index, &tmp);
- if (ret)
- break;
- } else {
- unsigned int fpidx = index - PT_FPR0;
-
- flush_fp_to_thread(child);
- if (fpidx < (PT_FPSCR - PT_FPR0))
- memcpy(&tmp, &child->thread.TS_FPR(fpidx),
- sizeof(long));
- else
- tmp = child->thread.fp_state.fpscr;
- }
- ret = put_user(tmp, datalp);
- break;
- }
-
- /* write the word at location addr in the USER area */
- case PTRACE_POKEUSR: {
- unsigned long index;
-
- ret = -EIO;
- /* convert to index and check */
-#ifdef CONFIG_PPC32
- index = addr >> 2;
- if ((addr & 3) || (index > PT_FPSCR)
- || (child->thread.regs == NULL))
-#else
- index = addr >> 3;
- if ((addr & 7) || (index > PT_FPSCR))
-#endif
- break;
-
- CHECK_FULL_REGS(child->thread.regs);
- if (index < PT_FPR0) {
- ret = ptrace_put_reg(child, index, data);
- } else {
- unsigned int fpidx = index - PT_FPR0;
-
- flush_fp_to_thread(child);
- if (fpidx < (PT_FPSCR - PT_FPR0))
- memcpy(&child->thread.TS_FPR(fpidx), &data,
- sizeof(long));
- else
- child->thread.fp_state.fpscr = data;
- ret = 0;
- }
- break;
- }
-
- case PPC_PTRACE_GETHWDBGINFO: {
- struct ppc_debug_info dbginfo;
-
- dbginfo.version = 1;
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- dbginfo.num_instruction_bps = CONFIG_PPC_ADV_DEBUG_IACS;
- dbginfo.num_data_bps = CONFIG_PPC_ADV_DEBUG_DACS;
- dbginfo.num_condition_regs = CONFIG_PPC_ADV_DEBUG_DVCS;
- dbginfo.data_bp_alignment = 4;
- dbginfo.sizeof_condition = 4;
- dbginfo.features = PPC_DEBUG_FEATURE_INSN_BP_RANGE |
- PPC_DEBUG_FEATURE_INSN_BP_MASK;
-#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
- dbginfo.features |=
- PPC_DEBUG_FEATURE_DATA_BP_RANGE |
- PPC_DEBUG_FEATURE_DATA_BP_MASK;
-#endif
-#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
- dbginfo.num_instruction_bps = 0;
- if (ppc_breakpoint_available())
- dbginfo.num_data_bps = 1;
- else
- dbginfo.num_data_bps = 0;
- dbginfo.num_condition_regs = 0;
-#ifdef CONFIG_PPC64
- dbginfo.data_bp_alignment = 8;
-#else
- dbginfo.data_bp_alignment = 4;
-#endif
- dbginfo.sizeof_condition = 0;
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
- dbginfo.features = PPC_DEBUG_FEATURE_DATA_BP_RANGE;
- if (dawr_enabled())
- dbginfo.features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR;
-#else
- dbginfo.features = 0;
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-#endif /* CONFIG_PPC_ADV_DEBUG_REGS */
-
- if (copy_to_user(datavp, &dbginfo,
- sizeof(struct ppc_debug_info)))
- return -EFAULT;
- return 0;
- }
-
- case PPC_PTRACE_SETHWDEBUG: {
- struct ppc_hw_breakpoint bp_info;
-
- if (copy_from_user(&bp_info, datavp,
- sizeof(struct ppc_hw_breakpoint)))
- return -EFAULT;
- return ppc_set_hwdebug(child, &bp_info);
- }
-
- case PPC_PTRACE_DELHWDEBUG: {
- ret = ppc_del_hwdebug(child, data);
- break;
- }
-
- case PTRACE_GET_DEBUGREG: {
-#ifndef CONFIG_PPC_ADV_DEBUG_REGS
- unsigned long dabr_fake;
-#endif
- ret = -EINVAL;
- /* We only support one DABR and no IABRS at the moment */
- if (addr > 0)
- break;
-#ifdef CONFIG_PPC_ADV_DEBUG_REGS
- ret = put_user(child->thread.debug.dac1, datalp);
-#else
- dabr_fake = ((child->thread.hw_brk.address & (~HW_BRK_TYPE_DABR)) |
- (child->thread.hw_brk.type & HW_BRK_TYPE_DABR));
- ret = put_user(dabr_fake, datalp);
-#endif
- break;
- }
-
- case PTRACE_SET_DEBUGREG:
- ret = ptrace_set_debugreg(child, addr, data);
- break;
-
-#ifdef CONFIG_PPC64
- case PTRACE_GETREGS64:
-#endif
- case PTRACE_GETREGS: /* Get all pt_regs from the child. */
- return copy_regset_to_user(child, &user_ppc_native_view,
- REGSET_GPR,
- 0, sizeof(struct user_pt_regs),
- datavp);
-
-#ifdef CONFIG_PPC64
- case PTRACE_SETREGS64:
-#endif
- case PTRACE_SETREGS: /* Set all gp regs in the child. */
- return copy_regset_from_user(child, &user_ppc_native_view,
- REGSET_GPR,
- 0, sizeof(struct user_pt_regs),
- datavp);
-
- case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */
- return copy_regset_to_user(child, &user_ppc_native_view,
- REGSET_FPR,
- 0, sizeof(elf_fpregset_t),
- datavp);
-
- case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */
- return copy_regset_from_user(child, &user_ppc_native_view,
- REGSET_FPR,
- 0, sizeof(elf_fpregset_t),
- datavp);
-
-#ifdef CONFIG_ALTIVEC
- case PTRACE_GETVRREGS:
- return copy_regset_to_user(child, &user_ppc_native_view,
- REGSET_VMX,
- 0, (33 * sizeof(vector128) +
- sizeof(u32)),
- datavp);
-
- case PTRACE_SETVRREGS:
- return copy_regset_from_user(child, &user_ppc_native_view,
- REGSET_VMX,
- 0, (33 * sizeof(vector128) +
- sizeof(u32)),
- datavp);
-#endif
-#ifdef CONFIG_VSX
- case PTRACE_GETVSRREGS:
- return copy_regset_to_user(child, &user_ppc_native_view,
- REGSET_VSX,
- 0, 32 * sizeof(double),
- datavp);
-
- case PTRACE_SETVSRREGS:
- return copy_regset_from_user(child, &user_ppc_native_view,
- REGSET_VSX,
- 0, 32 * sizeof(double),
- datavp);
-#endif
-#ifdef CONFIG_SPE
- case PTRACE_GETEVRREGS:
- /* Get the child spe register state. */
- return copy_regset_to_user(child, &user_ppc_native_view,
- REGSET_SPE, 0, 35 * sizeof(u32),
- datavp);
-
- case PTRACE_SETEVRREGS:
- /* Set the child spe register state. */
- return copy_regset_from_user(child, &user_ppc_native_view,
- REGSET_SPE, 0, 35 * sizeof(u32),
- datavp);
-#endif
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
- return ret;
-}
-
-#ifdef CONFIG_SECCOMP
-static int do_seccomp(struct pt_regs *regs)
-{
- if (!test_thread_flag(TIF_SECCOMP))
- return 0;
-
- /*
- * The ABI we present to seccomp tracers is that r3 contains
- * the syscall return value and orig_gpr3 contains the first
- * syscall parameter. This is different to the ptrace ABI where
- * both r3 and orig_gpr3 contain the first syscall parameter.
- */
- regs->gpr[3] = -ENOSYS;
-
- /*
- * We use the __ version here because we have already checked
- * TIF_SECCOMP. If this fails, there is nothing left to do, we
- * have already loaded -ENOSYS into r3, or seccomp has put
- * something else in r3 (via SECCOMP_RET_ERRNO/TRACE).
- */
- if (__secure_computing(NULL))
- return -1;
-
- /*
- * The syscall was allowed by seccomp, restore the register
- * state to what audit expects.
- * Note that we use orig_gpr3, which means a seccomp tracer can
- * modify the first syscall parameter (in orig_gpr3) and also
- * allow the syscall to proceed.
- */
- regs->gpr[3] = regs->orig_gpr3;
-
- return 0;
-}
-#else
-static inline int do_seccomp(struct pt_regs *regs) { return 0; }
-#endif /* CONFIG_SECCOMP */
-
-/**
- * do_syscall_trace_enter() - Do syscall tracing on kernel entry.
- * @regs: the pt_regs of the task to trace (current)
- *
- * Performs various types of tracing on syscall entry. This includes seccomp,
- * ptrace, syscall tracepoints and audit.
- *
- * The pt_regs are potentially visible to userspace via ptrace, so their
- * contents is ABI.
- *
- * One or more of the tracers may modify the contents of pt_regs, in particular
- * to modify arguments or even the syscall number itself.
- *
- * It's also possible that a tracer can choose to reject the system call. In
- * that case this function will return an illegal syscall number, and will put
- * an appropriate return value in regs->r3.
- *
- * Return: the (possibly changed) syscall number.
- */
-long do_syscall_trace_enter(struct pt_regs *regs)
-{
- u32 flags;
-
- user_exit();
-
- flags = READ_ONCE(current_thread_info()->flags) &
- (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
-
- if (flags) {
- int rc = tracehook_report_syscall_entry(regs);
-
- if (unlikely(flags & _TIF_SYSCALL_EMU)) {
- /*
- * A nonzero return code from
- * tracehook_report_syscall_entry() tells us to prevent
- * the syscall execution, but we are not going to
- * execute it anyway.
- *
- * Returning -1 will skip the syscall execution. We want
- * to avoid clobbering any registers, so we don't goto
- * the skip label below.
- */
- return -1;
- }
-
- if (rc) {
- /*
- * The tracer decided to abort the syscall. Note that
- * the tracer may also just change regs->gpr[0] to an
- * invalid syscall number, that is handled below on the
- * exit path.
- */
- goto skip;
- }
- }
-
- /* Run seccomp after ptrace; allow it to set gpr[3]. */
- if (do_seccomp(regs))
- return -1;
-
- /* Avoid trace and audit when syscall is invalid. */
- if (regs->gpr[0] >= NR_syscalls)
- goto skip;
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_enter(regs, regs->gpr[0]);
-
-#ifdef CONFIG_PPC64
- if (!is_32bit_task())
- audit_syscall_entry(regs->gpr[0], regs->gpr[3], regs->gpr[4],
- regs->gpr[5], regs->gpr[6]);
- else
-#endif
- audit_syscall_entry(regs->gpr[0],
- regs->gpr[3] & 0xffffffff,
- regs->gpr[4] & 0xffffffff,
- regs->gpr[5] & 0xffffffff,
- regs->gpr[6] & 0xffffffff);
-
- /* Return the possibly modified but valid syscall number */
- return regs->gpr[0];
-
-skip:
- /*
- * If we are aborting explicitly, or if the syscall number is
- * now invalid, set the return value to -ENOSYS.
- */
- regs->gpr[3] = -ENOSYS;
- return -1;
-}
-
-void do_syscall_trace_leave(struct pt_regs *regs)
-{
- int step;
-
- audit_syscall_exit(regs);
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_exit(regs, regs->result);
-
- step = test_thread_flag(TIF_SINGLESTEP);
- if (step || test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, step);
-
- user_enter();
-}
-
-void __init pt_regs_check(void);
-
-/*
- * Dummy function, its purpose is to break the build if struct pt_regs and
- * struct user_pt_regs don't match.
- */
-void __init pt_regs_check(void)
-{
- BUILD_BUG_ON(offsetof(struct pt_regs, gpr) !=
- offsetof(struct user_pt_regs, gpr));
- BUILD_BUG_ON(offsetof(struct pt_regs, nip) !=
- offsetof(struct user_pt_regs, nip));
- BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
- offsetof(struct user_pt_regs, msr));
- BUILD_BUG_ON(offsetof(struct pt_regs, msr) !=
- offsetof(struct user_pt_regs, msr));
- BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
- offsetof(struct user_pt_regs, orig_gpr3));
- BUILD_BUG_ON(offsetof(struct pt_regs, ctr) !=
- offsetof(struct user_pt_regs, ctr));
- BUILD_BUG_ON(offsetof(struct pt_regs, link) !=
- offsetof(struct user_pt_regs, link));
- BUILD_BUG_ON(offsetof(struct pt_regs, xer) !=
- offsetof(struct user_pt_regs, xer));
- BUILD_BUG_ON(offsetof(struct pt_regs, ccr) !=
- offsetof(struct user_pt_regs, ccr));
-#ifdef __powerpc64__
- BUILD_BUG_ON(offsetof(struct pt_regs, softe) !=
- offsetof(struct user_pt_regs, softe));
-#else
- BUILD_BUG_ON(offsetof(struct pt_regs, mq) !=
- offsetof(struct user_pt_regs, mq));
-#endif
- BUILD_BUG_ON(offsetof(struct pt_regs, trap) !=
- offsetof(struct user_pt_regs, trap));
- BUILD_BUG_ON(offsetof(struct pt_regs, dar) !=
- offsetof(struct user_pt_regs, dar));
- BUILD_BUG_ON(offsetof(struct pt_regs, dsisr) !=
- offsetof(struct user_pt_regs, dsisr));
- BUILD_BUG_ON(offsetof(struct pt_regs, result) !=
- offsetof(struct user_pt_regs, result));
-
- BUILD_BUG_ON(sizeof(struct user_pt_regs) > sizeof(struct pt_regs));
-
- // Now check that the pt_regs offsets match the uapi #defines
- #define CHECK_REG(_pt, _reg) \
- BUILD_BUG_ON(_pt != (offsetof(struct user_pt_regs, _reg) / \
- sizeof(unsigned long)));
-
- CHECK_REG(PT_R0, gpr[0]);
- CHECK_REG(PT_R1, gpr[1]);
- CHECK_REG(PT_R2, gpr[2]);
- CHECK_REG(PT_R3, gpr[3]);
- CHECK_REG(PT_R4, gpr[4]);
- CHECK_REG(PT_R5, gpr[5]);
- CHECK_REG(PT_R6, gpr[6]);
- CHECK_REG(PT_R7, gpr[7]);
- CHECK_REG(PT_R8, gpr[8]);
- CHECK_REG(PT_R9, gpr[9]);
- CHECK_REG(PT_R10, gpr[10]);
- CHECK_REG(PT_R11, gpr[11]);
- CHECK_REG(PT_R12, gpr[12]);
- CHECK_REG(PT_R13, gpr[13]);
- CHECK_REG(PT_R14, gpr[14]);
- CHECK_REG(PT_R15, gpr[15]);
- CHECK_REG(PT_R16, gpr[16]);
- CHECK_REG(PT_R17, gpr[17]);
- CHECK_REG(PT_R18, gpr[18]);
- CHECK_REG(PT_R19, gpr[19]);
- CHECK_REG(PT_R20, gpr[20]);
- CHECK_REG(PT_R21, gpr[21]);
- CHECK_REG(PT_R22, gpr[22]);
- CHECK_REG(PT_R23, gpr[23]);
- CHECK_REG(PT_R24, gpr[24]);
- CHECK_REG(PT_R25, gpr[25]);
- CHECK_REG(PT_R26, gpr[26]);
- CHECK_REG(PT_R27, gpr[27]);
- CHECK_REG(PT_R28, gpr[28]);
- CHECK_REG(PT_R29, gpr[29]);
- CHECK_REG(PT_R30, gpr[30]);
- CHECK_REG(PT_R31, gpr[31]);
- CHECK_REG(PT_NIP, nip);
- CHECK_REG(PT_MSR, msr);
- CHECK_REG(PT_ORIG_R3, orig_gpr3);
- CHECK_REG(PT_CTR, ctr);
- CHECK_REG(PT_LNK, link);
- CHECK_REG(PT_XER, xer);
- CHECK_REG(PT_CCR, ccr);
-#ifdef CONFIG_PPC64
- CHECK_REG(PT_SOFTE, softe);
-#else
- CHECK_REG(PT_MQ, mq);
-#endif
- CHECK_REG(PT_TRAP, trap);
- CHECK_REG(PT_DAR, dar);
- CHECK_REG(PT_DSISR, dsisr);
- CHECK_REG(PT_RESULT, result);
- #undef CHECK_REG
-
- BUILD_BUG_ON(PT_REGS_COUNT != sizeof(struct user_pt_regs) / sizeof(unsigned long));
-
- /*
- * PT_DSCR isn't a real reg, but it's important that it doesn't overlap the
- * real registers.
- */
- BUILD_BUG_ON(PT_DSCR < sizeof(struct user_pt_regs) / sizeof(unsigned long));
-}