================ @@ -0,0 +1,155 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// clang-format off + +// REQUIRES: target={{aarch64.*}} +// UNSUPPORTED: target={{.*-windows.*}} + +// The libSystem unwinder does not correctly read UNW_AARCH64_RA_SIGN_STATE, at +// least through OS version 27.0 +// XFAIL: stdlib=apple-libc++ && target={{.*}}-apple-{{.*}}{{(11|12|13|14|15|26)(\.\d+)?}} +// XFAIL: stdlib=apple-libc++ && target={{.*}}-apple-{{.*}}27.0 + +// clang-format on + +#undef NDEBUG +#include "../src/config.h" +#include "support/func_bounds.h" +#include <assert.h> +#include <inttypes.h> +#include <libunwind.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <unistd.h> +#include <unwind.h> + +#if defined(__APPLE__) +#include <sys/sysctl.h> +#endif +#if defined(_LIBUNWIND_HAVE_GETAUXVAL) || defined(_LIBUNWIND_HAVE_ELF_AUX_INFO) +#include <sys/auxv.h> +#endif + +// Note: This test requires FEAT_PAuth (and is setup to pass on other targets). + +#if defined(__APPLE__) +static bool checkHasPAuth() { + int has_pauth = 0; + size_t size = sizeof(has_pauth); + if (sysctlbyname("hw.optional.arm.FEAT_PAuth", &has_pauth, &size, NULL, 0)) + return false; + return has_pauth != 0; +} +#elif defined(_LIBUNWIND_HAVE_GETAUXVAL) +static bool checkHasPAuth() { + constexpr unsigned long hwcap_paca = (1UL << 30); + unsigned long hwcap = getauxval(AT_HWCAP); + return (hwcap & hwcap_paca) != 0; +} +#elif defined(_LIBUNWIND_HAVE_ELF_AUX_INFO) +static bool checkHasPAuth() { + constexpr unsigned long hwcap_paca = (1UL << 30); + unsigned long hwcap = 0; + elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap)); + return (hwcap & hwcap_paca) != 0; +} +#else +static bool checkHasPAuth() { + // TODO: Support other platforms. + return false; +} +#endif + +FUNC_BOUNDS_DECL(main_func); + +_Unwind_Reason_Code frame_handler(struct _Unwind_Context *ctx, void *arg) { + uint64_t ra_sign_state = + (uint64_t)_Unwind_GetGR(ctx, UNW_AARCH64_RA_SIGN_STATE); + + uintptr_t ip = _Unwind_GetIP(ctx); + if (ip >= (uintptr_t)FUNC_START(main_func) && + ip < (uintptr_t)FUNC_END(main_func)) { + + // Collect the RA from the callee that will return to main. + *(uint64_t *)arg = ra_sign_state; + + // Unwind until main is reached, above frames depend on the platform and + // architecture. + return _URC_END_OF_STACK; + } + +#if defined(__PTRAUTH__) || __has_feature(ptrauth_calls) + assert(ra_sign_state == 1); ---------------- kovdan01 wrote:
Would it be beneficial to also have a test with `ra_sign_state == 2`? https://github.com/llvm/llvm-project/pull/205188 _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
