10b57cec5SDimitry Andric /* ===-- assembly.h - libUnwind assembler support macros -------------------=== 20b57cec5SDimitry Andric * 30b57cec5SDimitry Andric * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric * See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric * 70b57cec5SDimitry Andric * ===----------------------------------------------------------------------=== 80b57cec5SDimitry Andric * 90b57cec5SDimitry Andric * This file defines macros for use in libUnwind assembler source. 100b57cec5SDimitry Andric * This file is not part of the interface of this library. 110b57cec5SDimitry Andric * 120b57cec5SDimitry Andric * ===----------------------------------------------------------------------=== 130b57cec5SDimitry Andric */ 140b57cec5SDimitry Andric 150b57cec5SDimitry Andric #ifndef UNWIND_ASSEMBLY_H 160b57cec5SDimitry Andric #define UNWIND_ASSEMBLY_H 170b57cec5SDimitry Andric 18d781ede6SDimitry Andric #if defined(__linux__) && defined(__CET__) 19349cc55cSDimitry Andric #include <cet.h> 20349cc55cSDimitry Andric #define _LIBUNWIND_CET_ENDBR _CET_ENDBR 21349cc55cSDimitry Andric #else 22349cc55cSDimitry Andric #define _LIBUNWIND_CET_ENDBR 23349cc55cSDimitry Andric #endif 24349cc55cSDimitry Andric 250b57cec5SDimitry Andric #if defined(__powerpc64__) 260b57cec5SDimitry Andric #define SEPARATOR ; 270b57cec5SDimitry Andric #define PPC64_OFFS_SRR0 0 280b57cec5SDimitry Andric #define PPC64_OFFS_CR 272 290b57cec5SDimitry Andric #define PPC64_OFFS_XER 280 300b57cec5SDimitry Andric #define PPC64_OFFS_LR 288 310b57cec5SDimitry Andric #define PPC64_OFFS_CTR 296 320b57cec5SDimitry Andric #define PPC64_OFFS_VRSAVE 304 330b57cec5SDimitry Andric #define PPC64_OFFS_FP 312 340b57cec5SDimitry Andric #define PPC64_OFFS_V 824 355ffd83dbSDimitry Andric #elif defined(__APPLE__) && defined(__aarch64__) 360b57cec5SDimitry Andric #define SEPARATOR %% 37fe6060f1SDimitry Andric #elif defined(__riscv) 38fe6060f1SDimitry Andric # define RISCV_ISIZE (__riscv_xlen / 8) 39fe6060f1SDimitry Andric # define RISCV_FOFFSET (RISCV_ISIZE * 32) 40fe6060f1SDimitry Andric # if defined(__riscv_flen) 41fe6060f1SDimitry Andric # define RISCV_FSIZE (__riscv_flen / 8) 42fe6060f1SDimitry Andric # endif 43fe6060f1SDimitry Andric 44fe6060f1SDimitry Andric # if __riscv_xlen == 64 45fe6060f1SDimitry Andric # define ILOAD ld 46fe6060f1SDimitry Andric # define ISTORE sd 47fe6060f1SDimitry Andric # elif __riscv_xlen == 32 48fe6060f1SDimitry Andric # define ILOAD lw 49fe6060f1SDimitry Andric # define ISTORE sw 50fe6060f1SDimitry Andric # else 51fe6060f1SDimitry Andric # error "Unsupported __riscv_xlen" 52fe6060f1SDimitry Andric # endif 53fe6060f1SDimitry Andric 54fe6060f1SDimitry Andric # if defined(__riscv_flen) 55fe6060f1SDimitry Andric # if __riscv_flen == 64 56fe6060f1SDimitry Andric # define FLOAD fld 57fe6060f1SDimitry Andric # define FSTORE fsd 58fe6060f1SDimitry Andric # elif __riscv_flen == 32 59fe6060f1SDimitry Andric # define FLOAD flw 60fe6060f1SDimitry Andric # define FSTORE fsw 61fe6060f1SDimitry Andric # else 62fe6060f1SDimitry Andric # error "Unsupported __riscv_flen" 63fe6060f1SDimitry Andric # endif 64fe6060f1SDimitry Andric # endif 65fe6060f1SDimitry Andric # define SEPARATOR ; 660b57cec5SDimitry Andric #else 670b57cec5SDimitry Andric #define SEPARATOR ; 680b57cec5SDimitry Andric #endif 690b57cec5SDimitry Andric 7081ad6265SDimitry Andric #if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1) && \ 7181ad6265SDimitry Andric !defined(_AIX) 720b57cec5SDimitry Andric #define PPC64_OPD1 .section .opd,"aw",@progbits SEPARATOR 730b57cec5SDimitry Andric #define PPC64_OPD2 SEPARATOR \ 740b57cec5SDimitry Andric .p2align 3 SEPARATOR \ 750b57cec5SDimitry Andric .quad .Lfunc_begin0 SEPARATOR \ 760b57cec5SDimitry Andric .quad .TOC.@tocbase SEPARATOR \ 770b57cec5SDimitry Andric .quad 0 SEPARATOR \ 780b57cec5SDimitry Andric .text SEPARATOR \ 790b57cec5SDimitry Andric .Lfunc_begin0: 800b57cec5SDimitry Andric #else 810b57cec5SDimitry Andric #define PPC64_OPD1 820b57cec5SDimitry Andric #define PPC64_OPD2 830b57cec5SDimitry Andric #endif 840b57cec5SDimitry Andric 850eae32dcSDimitry Andric #if defined(__aarch64__) && defined(__ARM_FEATURE_BTI_DEFAULT) 86e8d8bef9SDimitry Andric .pushsection ".note.gnu.property", "a" SEPARATOR \ 87e8d8bef9SDimitry Andric .balign 8 SEPARATOR \ 88e8d8bef9SDimitry Andric .long 4 SEPARATOR \ 89e8d8bef9SDimitry Andric .long 0x10 SEPARATOR \ 90e8d8bef9SDimitry Andric .long 0x5 SEPARATOR \ 91e8d8bef9SDimitry Andric .asciz "GNU" SEPARATOR \ 92e8d8bef9SDimitry Andric .long 0xc0000000 SEPARATOR /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */ \ 93e8d8bef9SDimitry Andric .long 4 SEPARATOR \ 94e8d8bef9SDimitry Andric .long 3 SEPARATOR /* GNU_PROPERTY_AARCH64_FEATURE_1_BTI AND */ \ 95e8d8bef9SDimitry Andric /* GNU_PROPERTY_AARCH64_FEATURE_1_PAC */ \ 96e8d8bef9SDimitry Andric .long 0 SEPARATOR \ 97e8d8bef9SDimitry Andric .popsection SEPARATOR 98e8d8bef9SDimitry Andric #define AARCH64_BTI bti c 99e8d8bef9SDimitry Andric #else 100e8d8bef9SDimitry Andric #define AARCH64_BTI 101e8d8bef9SDimitry Andric #endif 102e8d8bef9SDimitry Andric 1030eae32dcSDimitry Andric #if !defined(__aarch64__) 1040eae32dcSDimitry Andric #ifdef __ARM_FEATURE_PAC_DEFAULT 1050eae32dcSDimitry Andric .eabi_attribute Tag_PAC_extension, 2 1060eae32dcSDimitry Andric .eabi_attribute Tag_PACRET_use, 1 1070eae32dcSDimitry Andric #endif 1080eae32dcSDimitry Andric #ifdef __ARM_FEATURE_BTI_DEFAULT 1090eae32dcSDimitry Andric .eabi_attribute Tag_BTI_extension, 1 1100eae32dcSDimitry Andric .eabi_attribute Tag_BTI_use, 1 1110eae32dcSDimitry Andric #endif 1120eae32dcSDimitry Andric #endif 1130eae32dcSDimitry Andric 1140b57cec5SDimitry Andric #define GLUE2(a, b) a ## b 1150b57cec5SDimitry Andric #define GLUE(a, b) GLUE2(a, b) 1160b57cec5SDimitry Andric #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) 1170b57cec5SDimitry Andric 1180b57cec5SDimitry Andric #if defined(__APPLE__) 1190b57cec5SDimitry Andric 1200b57cec5SDimitry Andric #define SYMBOL_IS_FUNC(name) 1210b57cec5SDimitry Andric #define HIDDEN_SYMBOL(name) .private_extern name 122fe6060f1SDimitry Andric #if defined(_LIBUNWIND_HIDE_SYMBOLS) 123fe6060f1SDimitry Andric #define EXPORT_SYMBOL(name) HIDDEN_SYMBOL(name) 124fe6060f1SDimitry Andric #else 125fe6060f1SDimitry Andric #define EXPORT_SYMBOL(name) 126fe6060f1SDimitry Andric #endif 1270b57cec5SDimitry Andric #define WEAK_ALIAS(name, aliasname) \ 1280b57cec5SDimitry Andric .globl SYMBOL_NAME(aliasname) SEPARATOR \ 129fe6060f1SDimitry Andric EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 1300b57cec5SDimitry Andric SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 1310b57cec5SDimitry Andric 1320b57cec5SDimitry Andric #define NO_EXEC_STACK_DIRECTIVE 1330b57cec5SDimitry Andric 1340b57cec5SDimitry Andric #elif defined(__ELF__) 1350b57cec5SDimitry Andric 1360b57cec5SDimitry Andric #if defined(__arm__) 1370b57cec5SDimitry Andric #define SYMBOL_IS_FUNC(name) .type name,%function 1380b57cec5SDimitry Andric #else 1390b57cec5SDimitry Andric #define SYMBOL_IS_FUNC(name) .type name,@function 1400b57cec5SDimitry Andric #endif 1410b57cec5SDimitry Andric #define HIDDEN_SYMBOL(name) .hidden name 142fe6060f1SDimitry Andric #if defined(_LIBUNWIND_HIDE_SYMBOLS) 143fe6060f1SDimitry Andric #define EXPORT_SYMBOL(name) HIDDEN_SYMBOL(name) 144fe6060f1SDimitry Andric #else 145fe6060f1SDimitry Andric #define EXPORT_SYMBOL(name) 146fe6060f1SDimitry Andric #endif 1470b57cec5SDimitry Andric #define WEAK_SYMBOL(name) .weak name 1485ffd83dbSDimitry Andric 1495ffd83dbSDimitry Andric #if defined(__hexagon__) 1505ffd83dbSDimitry Andric #define WEAK_ALIAS(name, aliasname) \ 151fe6060f1SDimitry Andric EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 152fe6060f1SDimitry Andric WEAK_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 1535ffd83dbSDimitry Andric .equiv SYMBOL_NAME(aliasname), SYMBOL_NAME(name) 1545ffd83dbSDimitry Andric #else 1550b57cec5SDimitry Andric #define WEAK_ALIAS(name, aliasname) \ 156fe6060f1SDimitry Andric EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 157fe6060f1SDimitry Andric WEAK_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 1580b57cec5SDimitry Andric SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 1595ffd83dbSDimitry Andric #endif 1600b57cec5SDimitry Andric 1610b57cec5SDimitry Andric #if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ 1620b57cec5SDimitry Andric defined(__linux__) 1630b57cec5SDimitry Andric #define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits 1640b57cec5SDimitry Andric #else 1650b57cec5SDimitry Andric #define NO_EXEC_STACK_DIRECTIVE 1660b57cec5SDimitry Andric #endif 1670b57cec5SDimitry Andric 1680b57cec5SDimitry Andric #elif defined(_WIN32) 1690b57cec5SDimitry Andric 1700b57cec5SDimitry Andric #define SYMBOL_IS_FUNC(name) \ 1710b57cec5SDimitry Andric .def name SEPARATOR \ 1720b57cec5SDimitry Andric .scl 2 SEPARATOR \ 1730b57cec5SDimitry Andric .type 32 SEPARATOR \ 1740b57cec5SDimitry Andric .endef 1750b57cec5SDimitry Andric #define EXPORT_SYMBOL2(name) \ 1760b57cec5SDimitry Andric .section .drectve,"yn" SEPARATOR \ 1770b57cec5SDimitry Andric .ascii "-export:", #name, "\0" SEPARATOR \ 1780b57cec5SDimitry Andric .text 179fe6060f1SDimitry Andric #if defined(_LIBUNWIND_HIDE_SYMBOLS) 1800b57cec5SDimitry Andric #define EXPORT_SYMBOL(name) 1810b57cec5SDimitry Andric #else 1820b57cec5SDimitry Andric #define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name) 1830b57cec5SDimitry Andric #endif 1840b57cec5SDimitry Andric #define HIDDEN_SYMBOL(name) 1850b57cec5SDimitry Andric 1860b57cec5SDimitry Andric #if defined(__MINGW32__) 1870b57cec5SDimitry Andric #define WEAK_ALIAS(name, aliasname) \ 1880b57cec5SDimitry Andric .globl SYMBOL_NAME(aliasname) SEPARATOR \ 1890b57cec5SDimitry Andric EXPORT_SYMBOL(aliasname) SEPARATOR \ 1900b57cec5SDimitry Andric SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 1910b57cec5SDimitry Andric #else 1920b57cec5SDimitry Andric #define WEAK_ALIAS3(name, aliasname) \ 1930b57cec5SDimitry Andric .section .drectve,"yn" SEPARATOR \ 1940b57cec5SDimitry Andric .ascii "-alternatename:", #aliasname, "=", #name, "\0" SEPARATOR \ 1950b57cec5SDimitry Andric .text 1960b57cec5SDimitry Andric #define WEAK_ALIAS2(name, aliasname) \ 1970b57cec5SDimitry Andric WEAK_ALIAS3(name, aliasname) 1980b57cec5SDimitry Andric #define WEAK_ALIAS(name, aliasname) \ 1990b57cec5SDimitry Andric EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 2000b57cec5SDimitry Andric WEAK_ALIAS2(SYMBOL_NAME(name), SYMBOL_NAME(aliasname)) 2010b57cec5SDimitry Andric #endif 2020b57cec5SDimitry Andric 2030b57cec5SDimitry Andric #define NO_EXEC_STACK_DIRECTIVE 2040b57cec5SDimitry Andric 2050b57cec5SDimitry Andric #elif defined(__sparc__) 2060b57cec5SDimitry Andric 20781ad6265SDimitry Andric #elif defined(_AIX) 20881ad6265SDimitry Andric 20981ad6265SDimitry Andric #if defined(__powerpc64__) 21081ad6265SDimitry Andric #define VBYTE_LEN 8 21181ad6265SDimitry Andric #define CSECT_ALIGN 3 21281ad6265SDimitry Andric #else 21381ad6265SDimitry Andric #define VBYTE_LEN 4 21481ad6265SDimitry Andric #define CSECT_ALIGN 2 21581ad6265SDimitry Andric #endif 21681ad6265SDimitry Andric 21781ad6265SDimitry Andric // clang-format off 21881ad6265SDimitry Andric #define DEFINE_LIBUNWIND_FUNCTION_AND_WEAK_ALIAS(name, aliasname) \ 21981ad6265SDimitry Andric .csect .text[PR], 2 SEPARATOR \ 22081ad6265SDimitry Andric .csect .name[PR], 2 SEPARATOR \ 22181ad6265SDimitry Andric .globl name[DS] SEPARATOR \ 22281ad6265SDimitry Andric .globl .name[PR] SEPARATOR \ 22381ad6265SDimitry Andric .align 4 SEPARATOR \ 22481ad6265SDimitry Andric .csect name[DS], CSECT_ALIGN SEPARATOR \ 22581ad6265SDimitry Andric aliasname: \ 22681ad6265SDimitry Andric .vbyte VBYTE_LEN, .name[PR] SEPARATOR \ 22781ad6265SDimitry Andric .vbyte VBYTE_LEN, TOC[TC0] SEPARATOR \ 22881ad6265SDimitry Andric .vbyte VBYTE_LEN, 0 SEPARATOR \ 22981ad6265SDimitry Andric .weak aliasname SEPARATOR \ 23081ad6265SDimitry Andric .weak .aliasname SEPARATOR \ 23181ad6265SDimitry Andric .csect .name[PR], 2 SEPARATOR \ 23281ad6265SDimitry Andric .aliasname: \ 23381ad6265SDimitry Andric 23481ad6265SDimitry Andric #define WEAK_ALIAS(name, aliasname) 23581ad6265SDimitry Andric #define NO_EXEC_STACK_DIRECTIVE 23681ad6265SDimitry Andric 23781ad6265SDimitry Andric // clang-format on 2380b57cec5SDimitry Andric #else 2390b57cec5SDimitry Andric 2400b57cec5SDimitry Andric #error Unsupported target 2410b57cec5SDimitry Andric 2420b57cec5SDimitry Andric #endif 2430b57cec5SDimitry Andric 24481ad6265SDimitry Andric #if defined(_AIX) 24581ad6265SDimitry Andric // clang-format off 24681ad6265SDimitry Andric #define DEFINE_LIBUNWIND_FUNCTION(name) \ 24781ad6265SDimitry Andric .globl name[DS] SEPARATOR \ 24881ad6265SDimitry Andric .globl .name SEPARATOR \ 24981ad6265SDimitry Andric .align 4 SEPARATOR \ 25081ad6265SDimitry Andric .csect name[DS], CSECT_ALIGN SEPARATOR \ 25181ad6265SDimitry Andric .vbyte VBYTE_LEN, .name SEPARATOR \ 25281ad6265SDimitry Andric .vbyte VBYTE_LEN, TOC[TC0] SEPARATOR \ 25381ad6265SDimitry Andric .vbyte VBYTE_LEN, 0 SEPARATOR \ 25481ad6265SDimitry Andric .csect .text[PR], 2 SEPARATOR \ 25581ad6265SDimitry Andric .name: 25681ad6265SDimitry Andric // clang-format on 25781ad6265SDimitry Andric #else 2580b57cec5SDimitry Andric #define DEFINE_LIBUNWIND_FUNCTION(name) \ 2590b57cec5SDimitry Andric .globl SYMBOL_NAME(name) SEPARATOR \ 2600b57cec5SDimitry Andric HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \ 2610b57cec5SDimitry Andric SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 2620b57cec5SDimitry Andric PPC64_OPD1 \ 2630b57cec5SDimitry Andric SYMBOL_NAME(name): \ 264e8d8bef9SDimitry Andric PPC64_OPD2 \ 265e8d8bef9SDimitry Andric AARCH64_BTI 26681ad6265SDimitry Andric #endif 2670b57cec5SDimitry Andric 2680b57cec5SDimitry Andric #if defined(__arm__) 2690b57cec5SDimitry Andric #if !defined(__ARM_ARCH) 2700b57cec5SDimitry Andric #define __ARM_ARCH 4 2710b57cec5SDimitry Andric #endif 2720b57cec5SDimitry Andric 2730b57cec5SDimitry Andric #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 2740b57cec5SDimitry Andric #define ARM_HAS_BX 2750b57cec5SDimitry Andric #endif 2760b57cec5SDimitry Andric 2770b57cec5SDimitry Andric #ifdef ARM_HAS_BX 2780b57cec5SDimitry Andric #define JMP(r) bx r 2790b57cec5SDimitry Andric #else 2800b57cec5SDimitry Andric #define JMP(r) mov pc, r 2810b57cec5SDimitry Andric #endif 2820b57cec5SDimitry Andric #endif /* __arm__ */ 2830b57cec5SDimitry Andric 2841fd87a68SDimitry Andric #if defined(__powerpc__) 285fe6060f1SDimitry Andric #define PPC_LEFT_SHIFT(index) << (index) 286fe6060f1SDimitry Andric #endif 287fe6060f1SDimitry Andric 2880b57cec5SDimitry Andric #endif /* UNWIND_ASSEMBLY_H */ 289