// SPDX-License-Identifier: GPL-2.0-or-later #include #include #include #include #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 always 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) 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) 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) { if (!target->thread.regs) return -EINVAL; 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) { if (!target->thread.regs) return -EINVAL; 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; } static int dexcr_active(struct task_struct *target, const struct user_regset *regset) { if (!cpu_has_feature(CPU_FTR_ARCH_31)) return -ENODEV; return regset->n; } static int dexcr_get(struct task_struct *target, const struct user_regset *regset, struct membuf to) { if (!cpu_has_feature(CPU_FTR_ARCH_31)) return -ENODEV; membuf_store(&to, (u64)lower_32_bits(target->thread.dexcr)); /* * Technically the HDEXCR is per-cpu, but a hypervisor can't reasonably * change it between CPUs of the same guest. */ return membuf_store(&to, (u64)lower_32_bits(mfspr(SPRN_HDEXCR_RO))); } #ifdef CONFIG_CHECKPOINT_RESTORE static int hashkeyr_active(struct task_struct *target, const struct user_regset *regset) { if (!cpu_has_feature(CPU_FTR_ARCH_31)) return -ENODEV; return regset->n; } static int hashkeyr_get(struct task_struct *target, const struct user_regset *regset, struct membuf to) { if (!cpu_has_feature(CPU_FTR_ARCH_31)) return -ENODEV; return membuf_store(&to, target->thread.hashkeyr); } static int hashkeyr_set(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, const void *kbuf, const void __user *ubuf) { if (!cpu_has_feature(CPU_FTR_ARCH_31)) return -ENODEV; return user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.hashkeyr, 0, sizeof(unsigned long)); } #endif /* CONFIG_CHECKPOINT_RESTORE */ #endif /* CONFIG_PPC_BOOK3S_64 */ #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 }, [REGSET_DEXCR] = { .core_note_type = NT_PPC_DEXCR, .n = ELF_NDEXCR, .size = sizeof(u64), .align = sizeof(u64), .active = dexcr_active, .regset_get = dexcr_get }, #ifdef CONFIG_CHECKPOINT_RESTORE [REGSET_HASHKEYR] = { .core_note_type = NT_PPC_HASHKEYR, .n = ELF_NHASHKEYR, .size = sizeof(u64), .align = sizeof(u64), .active = hashkeyr_active, .regset_get = hashkeyr_get, .set = hashkeyr_set }, #endif #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 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)); } static int gpr32_set_common_kernel(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, const void *kbuf, unsigned long *regs) { const compat_ulong_t *k = kbuf; pos /= sizeof(compat_ulong_t); count /= sizeof(compat_ulong_t); for (; count > 0 && pos < PT_MSR; --count) regs[pos++] = *k++; if (count > 0 && pos == PT_MSR) { set_user_msr(target, *k++); ++pos; --count; } for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) regs[pos++] = *k++; for (; count > 0 && pos < PT_TRAP; --count, ++pos) ++k; if (count > 0 && pos == PT_TRAP) { set_user_trap(target, *k++); ++pos; --count; } kbuf = k; pos *= sizeof(compat_ulong_t); count *= sizeof(compat_ulong_t); user_regset_copyin_ignore(&pos, &count, &kbuf, NULL, (PT_TRAP + 1) * sizeof(compat_ulong_t), -1); return 0; } static int gpr32_set_common_user(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, const void __user *ubuf, unsigned long *regs) { const compat_ulong_t __user *u = ubuf; const void *kbuf = NULL; compat_ulong_t reg; if (!user_read_access_begin(u, count)) return -EFAULT; pos /= sizeof(reg); count /= sizeof(reg); for (; count > 0 && pos < PT_MSR; --count) { unsafe_get_user(reg, u++, Efault); regs[pos++] = reg; } if (count > 0 && pos == PT_MSR) { unsafe_get_user(reg, u++, Efault); set_user_msr(target, reg); ++pos; --count; } 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) { unsafe_get_user(reg, u++, Efault); set_user_trap(target, reg); ++pos; --count; } user_read_access_end(); ubuf = u; pos *= sizeof(reg); count *= sizeof(reg); user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, (PT_TRAP + 1) * sizeof(reg), -1); return 0; Efault: user_read_access_end(); return -EFAULT; } 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) { if (kbuf) return gpr32_set_common_kernel(target, regset, pos, count, kbuf, regs); else return gpr32_set_common_user(target, regset, pos, count, ubuf, regs); } 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; }