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846 lines
23 KiB
846 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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#include <linux/regset.h> |
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#include <linux/elf.h> |
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#include <linux/nospec.h> |
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#include <linux/pkeys.h> |
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#include "ptrace-decl.h" |
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struct pt_regs_offset { |
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const char *name; |
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int offset; |
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}; |
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#define STR(s) #s /* convert to string */ |
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#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} |
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#define GPR_OFFSET_NAME(num) \ |
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{.name = STR(r##num), .offset = offsetof(struct pt_regs, gpr[num])}, \ |
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{.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])} |
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#define REG_OFFSET_END {.name = NULL, .offset = 0} |
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static const struct pt_regs_offset regoffset_table[] = { |
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GPR_OFFSET_NAME(0), |
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GPR_OFFSET_NAME(1), |
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GPR_OFFSET_NAME(2), |
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GPR_OFFSET_NAME(3), |
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GPR_OFFSET_NAME(4), |
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GPR_OFFSET_NAME(5), |
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GPR_OFFSET_NAME(6), |
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GPR_OFFSET_NAME(7), |
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GPR_OFFSET_NAME(8), |
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GPR_OFFSET_NAME(9), |
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GPR_OFFSET_NAME(10), |
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GPR_OFFSET_NAME(11), |
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GPR_OFFSET_NAME(12), |
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GPR_OFFSET_NAME(13), |
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GPR_OFFSET_NAME(14), |
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GPR_OFFSET_NAME(15), |
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GPR_OFFSET_NAME(16), |
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GPR_OFFSET_NAME(17), |
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GPR_OFFSET_NAME(18), |
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GPR_OFFSET_NAME(19), |
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GPR_OFFSET_NAME(20), |
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GPR_OFFSET_NAME(21), |
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GPR_OFFSET_NAME(22), |
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GPR_OFFSET_NAME(23), |
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GPR_OFFSET_NAME(24), |
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GPR_OFFSET_NAME(25), |
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GPR_OFFSET_NAME(26), |
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GPR_OFFSET_NAME(27), |
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GPR_OFFSET_NAME(28), |
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GPR_OFFSET_NAME(29), |
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GPR_OFFSET_NAME(30), |
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GPR_OFFSET_NAME(31), |
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REG_OFFSET_NAME(nip), |
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REG_OFFSET_NAME(msr), |
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REG_OFFSET_NAME(ctr), |
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REG_OFFSET_NAME(link), |
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REG_OFFSET_NAME(xer), |
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REG_OFFSET_NAME(ccr), |
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#ifdef CONFIG_PPC64 |
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REG_OFFSET_NAME(softe), |
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#else |
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REG_OFFSET_NAME(mq), |
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#endif |
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REG_OFFSET_NAME(trap), |
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REG_OFFSET_NAME(dar), |
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REG_OFFSET_NAME(dsisr), |
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REG_OFFSET_END, |
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}; |
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/** |
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* regs_query_register_offset() - query register offset from its name |
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* @name: the name of a register |
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* |
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* regs_query_register_offset() returns the offset of a register in struct |
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* pt_regs from its name. If the name is invalid, this returns -EINVAL; |
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*/ |
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int regs_query_register_offset(const char *name) |
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{ |
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const struct pt_regs_offset *roff; |
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for (roff = regoffset_table; roff->name != NULL; roff++) |
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if (!strcmp(roff->name, name)) |
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return roff->offset; |
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return -EINVAL; |
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} |
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/** |
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* regs_query_register_name() - query register name from its offset |
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* @offset: the offset of a register in struct pt_regs. |
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* |
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* regs_query_register_name() returns the name of a register from its |
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* offset in struct pt_regs. If the @offset is invalid, this returns NULL; |
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*/ |
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const char *regs_query_register_name(unsigned int offset) |
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{ |
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const struct pt_regs_offset *roff; |
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for (roff = regoffset_table; roff->name != NULL; roff++) |
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if (roff->offset == offset) |
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return roff->name; |
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return NULL; |
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} |
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/* |
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* does not yet catch signals sent when the child dies. |
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* in exit.c or in signal.c. |
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*/ |
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static unsigned long get_user_msr(struct task_struct *task) |
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{ |
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return task->thread.regs->msr | task->thread.fpexc_mode; |
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} |
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static __always_inline int set_user_msr(struct task_struct *task, unsigned long msr) |
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{ |
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task->thread.regs->msr &= ~MSR_DEBUGCHANGE; |
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task->thread.regs->msr |= msr & MSR_DEBUGCHANGE; |
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return 0; |
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} |
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#ifdef CONFIG_PPC64 |
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static int get_user_dscr(struct task_struct *task, unsigned long *data) |
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{ |
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*data = task->thread.dscr; |
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return 0; |
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} |
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static int set_user_dscr(struct task_struct *task, unsigned long dscr) |
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{ |
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task->thread.dscr = dscr; |
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task->thread.dscr_inherit = 1; |
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return 0; |
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} |
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#else |
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static int get_user_dscr(struct task_struct *task, unsigned long *data) |
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{ |
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return -EIO; |
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} |
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static int set_user_dscr(struct task_struct *task, unsigned long dscr) |
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{ |
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return -EIO; |
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} |
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#endif |
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/* |
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* We prevent mucking around with the reserved area of trap |
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* which are used internally by the kernel. |
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*/ |
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static __always_inline int set_user_trap(struct task_struct *task, unsigned long trap) |
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{ |
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set_trap(task->thread.regs, trap); |
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return 0; |
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} |
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/* |
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* Get contents of register REGNO in task TASK. |
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*/ |
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int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data) |
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{ |
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unsigned int regs_max; |
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if (task->thread.regs == NULL || !data) |
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return -EIO; |
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if (regno == PT_MSR) { |
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*data = get_user_msr(task); |
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return 0; |
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} |
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if (regno == PT_DSCR) |
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return get_user_dscr(task, data); |
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/* |
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* softe copies paca->irq_soft_mask variable state. Since irq_soft_mask is |
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* no more used as a flag, lets force usr to alway see the softe value as 1 |
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* which means interrupts are not soft disabled. |
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*/ |
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if (IS_ENABLED(CONFIG_PPC64) && regno == PT_SOFTE) { |
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*data = 1; |
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return 0; |
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} |
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regs_max = sizeof(struct user_pt_regs) / sizeof(unsigned long); |
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if (regno < regs_max) { |
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regno = array_index_nospec(regno, regs_max); |
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*data = ((unsigned long *)task->thread.regs)[regno]; |
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return 0; |
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} |
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return -EIO; |
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} |
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/* |
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* Write contents of register REGNO in task TASK. |
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*/ |
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int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data) |
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{ |
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if (task->thread.regs == NULL) |
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return -EIO; |
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if (regno == PT_MSR) |
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return set_user_msr(task, data); |
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if (regno == PT_TRAP) |
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return set_user_trap(task, data); |
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if (regno == PT_DSCR) |
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return set_user_dscr(task, data); |
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if (regno <= PT_MAX_PUT_REG) { |
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regno = array_index_nospec(regno, PT_MAX_PUT_REG + 1); |
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((unsigned long *)task->thread.regs)[regno] = data; |
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return 0; |
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} |
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return -EIO; |
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} |
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static int gpr_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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struct membuf to_msr = membuf_at(&to, offsetof(struct pt_regs, msr)); |
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#ifdef CONFIG_PPC64 |
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struct membuf to_softe = membuf_at(&to, offsetof(struct pt_regs, softe)); |
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#endif |
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if (target->thread.regs == NULL) |
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return -EIO; |
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membuf_write(&to, target->thread.regs, sizeof(struct user_pt_regs)); |
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membuf_store(&to_msr, get_user_msr(target)); |
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#ifdef CONFIG_PPC64 |
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membuf_store(&to_softe, 0x1ul); |
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#endif |
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return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) - |
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sizeof(struct user_pt_regs)); |
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} |
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static int gpr_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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unsigned long reg; |
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int ret; |
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if (target->thread.regs == NULL) |
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return -EIO; |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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target->thread.regs, |
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0, PT_MSR * sizeof(reg)); |
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if (!ret && count > 0) { |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, |
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PT_MSR * sizeof(reg), |
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(PT_MSR + 1) * sizeof(reg)); |
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if (!ret) |
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ret = set_user_msr(target, reg); |
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} |
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BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != |
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offsetof(struct pt_regs, msr) + sizeof(long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.regs->orig_gpr3, |
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PT_ORIG_R3 * sizeof(reg), |
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(PT_MAX_PUT_REG + 1) * sizeof(reg)); |
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if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret) |
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ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, |
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(PT_MAX_PUT_REG + 1) * sizeof(reg), |
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PT_TRAP * sizeof(reg)); |
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if (!ret && count > 0) { |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, |
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PT_TRAP * sizeof(reg), |
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(PT_TRAP + 1) * sizeof(reg)); |
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if (!ret) |
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ret = set_user_trap(target, reg); |
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} |
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if (!ret) |
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ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, |
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(PT_TRAP + 1) * sizeof(reg), -1); |
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return ret; |
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} |
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#ifdef CONFIG_PPC64 |
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static int ppr_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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return membuf_write(&to, &target->thread.regs->ppr, sizeof(u64)); |
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} |
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static int ppr_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.regs->ppr, 0, sizeof(u64)); |
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} |
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static int dscr_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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return membuf_write(&to, &target->thread.dscr, sizeof(u64)); |
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} |
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static int dscr_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.dscr, 0, sizeof(u64)); |
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} |
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#endif |
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#ifdef CONFIG_PPC_BOOK3S_64 |
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static int tar_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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return membuf_write(&to, &target->thread.tar, sizeof(u64)); |
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} |
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static int tar_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.tar, 0, sizeof(u64)); |
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} |
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static int ebb_active(struct task_struct *target, const struct user_regset *regset) |
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{ |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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if (target->thread.used_ebb) |
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return regset->n; |
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return 0; |
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} |
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static int ebb_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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/* Build tests */ |
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BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr)); |
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BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr)); |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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if (!target->thread.used_ebb) |
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return -ENODATA; |
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return membuf_write(&to, &target->thread.ebbrr, 3 * sizeof(unsigned long)); |
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} |
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static int ebb_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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int ret = 0; |
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/* Build tests */ |
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BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr)); |
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BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr)); |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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if (target->thread.used_ebb) |
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return -ENODATA; |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.ebbrr, |
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0, sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.ebbhr, sizeof(unsigned long), |
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2 * sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.bescr, 2 * sizeof(unsigned long), |
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3 * sizeof(unsigned long)); |
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return ret; |
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} |
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static int pmu_active(struct task_struct *target, const struct user_regset *regset) |
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{ |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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return regset->n; |
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} |
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static int pmu_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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/* Build tests */ |
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BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar)); |
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BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier)); |
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BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2)); |
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BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0)); |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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return membuf_write(&to, &target->thread.siar, 5 * sizeof(unsigned long)); |
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} |
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static int pmu_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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int ret = 0; |
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/* Build tests */ |
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BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar)); |
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BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier)); |
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BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2)); |
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BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0)); |
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if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
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return -ENODEV; |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.siar, |
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0, sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.sdar, sizeof(unsigned long), |
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2 * sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.sier, 2 * sizeof(unsigned long), |
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3 * sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.mmcr2, 3 * sizeof(unsigned long), |
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4 * sizeof(unsigned long)); |
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if (!ret) |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&target->thread.mmcr0, 4 * sizeof(unsigned long), |
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5 * sizeof(unsigned long)); |
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return ret; |
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} |
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#endif |
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#ifdef CONFIG_PPC_MEM_KEYS |
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static int pkey_active(struct task_struct *target, const struct user_regset *regset) |
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{ |
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if (!arch_pkeys_enabled()) |
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return -ENODEV; |
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return regset->n; |
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} |
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static int pkey_get(struct task_struct *target, const struct user_regset *regset, |
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struct membuf to) |
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{ |
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if (!arch_pkeys_enabled()) |
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return -ENODEV; |
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membuf_store(&to, target->thread.regs->amr); |
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membuf_store(&to, target->thread.regs->iamr); |
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return membuf_store(&to, default_uamor); |
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} |
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static int pkey_set(struct task_struct *target, const struct user_regset *regset, |
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unsigned int pos, unsigned int count, const void *kbuf, |
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const void __user *ubuf) |
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{ |
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u64 new_amr; |
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int ret; |
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if (!arch_pkeys_enabled()) |
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return -ENODEV; |
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/* Only the AMR can be set from userspace */ |
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if (pos != 0 || count != sizeof(new_amr)) |
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return -EINVAL; |
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
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&new_amr, 0, sizeof(new_amr)); |
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if (ret) |
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return ret; |
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/* |
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* UAMOR determines which bits of the AMR can be set from userspace. |
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* UAMOR value 0b11 indicates that the AMR value can be modified |
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* from userspace. If the kernel is using a specific key, we avoid |
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* userspace modifying the AMR value for that key by masking them |
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* via UAMOR 0b00. |
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* |
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* Pick the AMR values for the keys that kernel is using. This |
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* will be indicated by the ~default_uamor bits. |
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*/ |
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target->thread.regs->amr = (new_amr & default_uamor) | |
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(target->thread.regs->amr & ~default_uamor); |
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return 0; |
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} |
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#endif /* CONFIG_PPC_MEM_KEYS */ |
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static const struct user_regset native_regsets[] = { |
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[REGSET_GPR] = { |
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.core_note_type = NT_PRSTATUS, .n = ELF_NGREG, |
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.size = sizeof(long), .align = sizeof(long), |
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.regset_get = gpr_get, .set = gpr_set |
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}, |
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[REGSET_FPR] = { |
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.core_note_type = NT_PRFPREG, .n = ELF_NFPREG, |
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.size = sizeof(double), .align = sizeof(double), |
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.regset_get = fpr_get, .set = fpr_set |
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}, |
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#ifdef CONFIG_ALTIVEC |
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[REGSET_VMX] = { |
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.core_note_type = NT_PPC_VMX, .n = 34, |
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.size = sizeof(vector128), .align = sizeof(vector128), |
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.active = vr_active, .regset_get = vr_get, .set = vr_set |
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}, |
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#endif |
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#ifdef CONFIG_VSX |
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[REGSET_VSX] = { |
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.core_note_type = NT_PPC_VSX, .n = 32, |
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.size = sizeof(double), .align = sizeof(double), |
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.active = vsr_active, .regset_get = vsr_get, .set = vsr_set |
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}, |
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#endif |
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#ifdef CONFIG_SPE |
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[REGSET_SPE] = { |
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.core_note_type = NT_PPC_SPE, .n = 35, |
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.size = sizeof(u32), .align = sizeof(u32), |
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.active = evr_active, .regset_get = evr_get, .set = evr_set |
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}, |
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#endif |
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#ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
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[REGSET_TM_CGPR] = { |
|
.core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG, |
|
.size = sizeof(long), .align = sizeof(long), |
|
.active = tm_cgpr_active, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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), |
|
.regset_get = ppr_get, .set = ppr_set |
|
}, |
|
[REGSET_DSCR] = { |
|
.core_note_type = NT_PPC_DSCR, .n = 1, |
|
.size = sizeof(u64), .align = sizeof(u64), |
|
.regset_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), |
|
.regset_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, .regset_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, .regset_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, .regset_get = pkey_get, .set = pkey_set |
|
}, |
|
#endif |
|
}; |
|
|
|
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) |
|
}; |
|
|
|
#include <linux/compat.h> |
|
|
|
int gpr32_get_common(struct task_struct *target, |
|
const struct user_regset *regset, |
|
struct membuf to, unsigned long *regs) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < PT_MSR; i++) |
|
membuf_store(&to, (u32)regs[i]); |
|
membuf_store(&to, (u32)get_user_msr(target)); |
|
for (i++ ; i < PT_REGS_COUNT; i++) |
|
membuf_store(&to, (u32)regs[i]); |
|
return membuf_zero(&to, (ELF_NGREG - PT_REGS_COUNT) * sizeof(u32)); |
|
} |
|
|
|
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; |
|
|
|
if (!kbuf && !user_read_access_begin(u, count)) |
|
return -EFAULT; |
|
|
|
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) { |
|
unsafe_get_user(reg, u++, Efault); |
|
regs[pos++] = reg; |
|
} |
|
|
|
|
|
if (count > 0 && pos == PT_MSR) { |
|
if (kbuf) |
|
reg = *k++; |
|
else |
|
unsafe_get_user(reg, u++, 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) { |
|
unsafe_get_user(reg, u++, Efault); |
|
regs[pos++] = reg; |
|
} |
|
for (; count > 0 && pos < PT_TRAP; --count, ++pos) |
|
unsafe_get_user(reg, u++, Efault); |
|
} |
|
|
|
if (count > 0 && pos == PT_TRAP) { |
|
if (kbuf) |
|
reg = *k++; |
|
else |
|
unsafe_get_user(reg, u++, Efault); |
|
set_user_trap(target, reg); |
|
++pos; |
|
--count; |
|
} |
|
if (!kbuf) |
|
user_read_access_end(); |
|
|
|
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); |
|
|
|
Efault: |
|
user_read_access_end(); |
|
return -EFAULT; |
|
} |
|
|
|
static int gpr32_get(struct task_struct *target, |
|
const struct user_regset *regset, |
|
struct membuf to) |
|
{ |
|
if (target->thread.regs == NULL) |
|
return -EIO; |
|
|
|
return gpr32_get_common(target, regset, to, |
|
&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; |
|
|
|
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), |
|
.regset_get = gpr32_get, .set = gpr32_set |
|
}, |
|
[REGSET_FPR] = { |
|
.core_note_type = NT_PRFPREG, .n = ELF_NFPREG, |
|
.size = sizeof(double), .align = sizeof(double), |
|
.regset_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, .regset_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, .regset_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, |
|
.regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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, .regset_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), |
|
.regset_get = ppr_get, .set = ppr_set |
|
}, |
|
[REGSET_DSCR] = { |
|
.core_note_type = NT_PPC_DSCR, .n = 1, |
|
.size = sizeof(u64), .align = sizeof(u64), |
|
.regset_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), |
|
.regset_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, .regset_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) |
|
}; |
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task) |
|
{ |
|
if (IS_ENABLED(CONFIG_PPC64) && test_tsk_thread_flag(task, TIF_32BIT)) |
|
return &user_ppc_compat_view; |
|
return &user_ppc_native_view; |
|
}
|
|
|