| // SPDX-License-Identifier: GPL-2.0-or-later |
| |
| #include <linux/regset.h> |
| #include <linux/elf.h> |
| #include <linux/nospec.h> |
| #include <linux/pkeys.h> |
| |
| #include "ptrace-decl.h" |
| |
| 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} |
| |
| 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, |
| }; |
| |
| /** |
| * 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. |
| */ |
| |
| static unsigned long get_user_msr(struct task_struct *task) |
| { |
| return task->thread.regs->msr | task->thread.fpexc_mode; |
| } |
| |
| static __always_inline int set_user_msr(struct task_struct *task, unsigned long msr) |
| { |
| unsigned long newmsr = (task->thread.regs->msr & ~MSR_DEBUGCHANGE) | |
| (msr & MSR_DEBUGCHANGE); |
| regs_set_return_msr(task->thread.regs, newmsr); |
| return 0; |
| } |
| |
| #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 __always_inline int set_user_trap(struct task_struct *task, unsigned long trap) |
| { |
| set_trap(task->thread.regs, trap); |
| 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); |
| |
| /* |
| * 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 (IS_ENABLED(CONFIG_PPC64) && regno == PT_SOFTE) { |
| *data = 1; |
| return 0; |
| } |
| |
| 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, |
| struct membuf to) |
| { |
| struct membuf to_msr = membuf_at(&to, offsetof(struct pt_regs, msr)); |
| #ifdef CONFIG_PPC64 |
| struct membuf to_softe = membuf_at(&to, offsetof(struct pt_regs, softe)); |
| #endif |
| if (target->thread.regs == NULL) |
| return -EIO; |
| |
| membuf_write(&to, target->thread.regs, sizeof(struct user_pt_regs)); |
| |
| membuf_store(&to_msr, get_user_msr(target)); |
| #ifdef CONFIG_PPC64 |
| membuf_store(&to_softe, 0x1ul); |
| #endif |
| return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) - |
| sizeof(struct user_pt_regs)); |
| } |
| |
| 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; |
| |
| 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; |
| } |
| |
| #ifdef CONFIG_PPC64 |
| static int ppr_get(struct task_struct *target, const struct user_regset *regset, |
| struct membuf to) |
| { |
| return membuf_write(&to, &target->thread.regs->ppr, 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, |
| struct membuf to) |
| { |
| return membuf_write(&to, &target->thread.dscr, 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, |
| struct membuf to) |
| { |
| return membuf_write(&to, &target->thread.tar, 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, |
| struct membuf to) |
| { |
| /* 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 membuf_write(&to, &target->thread.ebbrr, 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, |
| struct membuf to) |
| { |
| /* 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 membuf_write(&to, &target->thread.siar, 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, |
| struct membuf to) |
| { |
| |
| if (!arch_pkeys_enabled()) |
| return -ENODEV; |
| |
| membuf_store(&to, target->thread.regs->amr); |
| membuf_store(&to, target->thread.regs->iamr); |
| return membuf_store(&to, default_uamor); |
| } |
| |
| 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. |
| * UAMOR value 0b11 indicates that the AMR value can be modified |
| * from userspace. If the kernel is using a specific key, we avoid |
| * userspace modifying the AMR value for that key by masking them |
| * via UAMOR 0b00. |
| * |
| * Pick the AMR values for the keys that kernel is using. This |
| * will be indicated by the ~default_uamor bits. |
| */ |
| target->thread.regs->amr = (new_amr & default_uamor) | |
| (target->thread.regs->amr & ~default_uamor); |
| |
| return 0; |
| } |
| #endif /* CONFIG_PPC_MEM_KEYS */ |
| |
| static const struct user_regset native_regsets[] = { |
| [REGSET_GPR] = { |
| .core_note_type = NT_PRSTATUS, .n = ELF_NGREG, |
| .size = sizeof(long), .align = sizeof(long), |
| .regset_get = gpr_get, .set = gpr_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_VSX |
| [REGSET_VSX] = { |
| .core_note_type = NT_PPC_VSX, .n = 32, |
| .size = sizeof(double), .align = sizeof(double), |
| .active = vsr_active, .regset_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, .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_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_COMPAT) && is_tsk_32bit_task(task)) |
| return &user_ppc_compat_view; |
| return &user_ppc_native_view; |
| } |