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Differential D52357 Diff 161525 sys/arm64/arm64/ptrauth.c

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sys/arm64/arm64/ptrauth.c

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update_special_reg(ID_AA64ISAR1_EL1, ID_AA64ISAR1_API_MASK | update_special_reg(ID_AA64ISAR1_EL1, ID_AA64ISAR1_API_MASK |
ID_AA64ISAR1_APA_MASK | ID_AA64ISAR1_GPA_MASK | ID_AA64ISAR1_APA_MASK | ID_AA64ISAR1_GPA_MASK |
ID_AA64ISAR1_GPI_MASK, 0); ID_AA64ISAR1_GPI_MASK, 0);
update_special_reg(ID_AA64ISAR2_EL1, ID_AA64ISAR2_APA3_MASK, 0); update_special_reg(ID_AA64ISAR2_EL1, ID_AA64ISAR2_APA3_MASK, 0);
return (false); return (false);
} }
static void static bool
ptrauth_enable(const struct cpu_feat *feat __unused, ptrauth_enable(const struct cpu_feat *feat __unused,
cpu_feat_errata errata_status __unused, u_int *errata_list __unused, cpu_feat_errata errata_status __unused, u_int *errata_list __unused,
u_int errata_count __unused) u_int errata_count __unused)
{ {
enable_ptrauth = true; enable_ptrauth = true;
elf64_addr_mask.code |= PAC_ADDR_MASK; elf64_addr_mask.code |= PAC_ADDR_MASK;
elf64_addr_mask.data |= PAC_ADDR_MASK; elf64_addr_mask.data |= PAC_ADDR_MASK;
#ifdef COMPAT_FREEBSD14 #ifdef COMPAT_FREEBSD14
elf64_addr_mask_14.code |= PAC_ADDR_MASK_14; elf64_addr_mask_14.code |= PAC_ADDR_MASK_14;
elf64_addr_mask_14.data |= PAC_ADDR_MASK_14; elf64_addr_mask_14.data |= PAC_ADDR_MASK_14;
#endif #endif
return (true);
} }
CPU_FEAT(feat_pauth, CPU_FEAT(feat_pauth, "Pointer Authentication",
ptrauth_check, NULL, ptrauth_enable, ptrauth_check, NULL, ptrauth_enable,
CPU_FEAT_EARLY_BOOT | CPU_FEAT_SYSTEM); CPU_FEAT_EARLY_BOOT | CPU_FEAT_SYSTEM);
/* Copy the keys when forking a new process */ /* Copy the keys when forking a new process */
void void
ptrauth_fork(struct thread *new_td, struct thread *orig_td) ptrauth_fork(struct thread *new_td, struct thread *orig_td)
{ {
if (!enable_ptrauth) if (!enable_ptrauth)
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