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Diffstat (limited to 'arch/powerpc/kernel/ptrace.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace.c | 3468 |
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, ®, - 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, ®, - 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, ®, - 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, ®, - 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)); -} |