#include "unwind.h" #include "thread.h" #include "session.h" #include "debug.h" #include "arch/common.h" struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops; struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops; struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops; static void unwind__register_ops(struct thread *thread, struct unwind_libunwind_ops *ops) { thread->unwind_libunwind_ops = ops; } int unwind__prepare_access(struct thread *thread, struct map *map, bool *initialized) { const char *arch; enum dso_type dso_type; struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops; int err; if (thread->addr_space) { pr_debug("unwind: thread map already set, dso=%s\n", map->dso->name); if (initialized) *initialized = true; return 0; } /* env->arch is NULL for live-mode (i.e. perf top) */ if (!thread->mg->machine->env || !thread->mg->machine->env->arch) goto out_register; dso_type = dso__type(map->dso, thread->mg->machine); if (dso_type == DSO__TYPE_UNKNOWN) return 0; arch = normalize_arch(thread->mg->machine->env->arch); if (!strcmp(arch, "x86")) { if (dso_type != DSO__TYPE_64BIT) ops = x86_32_unwind_libunwind_ops; } else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) { if (dso_type == DSO__TYPE_64BIT) ops = arm64_unwind_libunwind_ops; } if (!ops) { pr_err("unwind: target platform=%s is not supported\n", arch); return -1; } out_register: unwind__register_ops(thread, ops); err = thread->unwind_libunwind_ops->prepare_access(thread); if (initialized) *initialized = err ? false : true; return err; } void unwind__flush_access(struct thread *thread) { if (thread->unwind_libunwind_ops) thread->unwind_libunwind_ops->flush_access(thread); } void unwind__finish_access(struct thread *thread) { if (thread->unwind_libunwind_ops) thread->unwind_libunwind_ops->finish_access(thread); } int unwind__get_entries(unwind_entry_cb_t cb, void *arg, struct thread *thread, struct perf_sample *data, int max_stack) { if (thread->unwind_libunwind_ops) return thread->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack); return 0; }
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authorMarc Zyngier <marc.zyngier@arm.com>2016-12-12 13:50:26 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2016-12-12 17:52:27 +0000
commit75037120e62b58c536999eb23d70cfcb6d6c0bcc (patch)
tree5fe10ee846ba9d7e5c61b1ea7ce0fc2fac83d793 /include
parentcd9e1927a525f6ce7c0d99c6e038f0a0b9e85176 (diff)
arm64: Disable PAN on uaccess_enable()
Commit 4b65a5db3627 ("arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1") added conditional user access enable/disable. Unfortunately, a typo prevents the PAN bit from being cleared for user access functions. Restore the PAN functionality by adding the missing '!'. Fixes: b65a5db3627 ("arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1") Reported-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'include')