diff options
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[3 |