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1# Copyright (c) 2021-2022 Huawei Device Co., Ltd.
2# Licensed under the Apache License, Version 2.0 (the "License");
3# you may not use this file except in compliance with the License.
4# You may obtain a copy of the License at
5#
6# http://www.apache.org/licenses/LICENSE-2.0
7#
8# Unless required by applicable law or agreed to in writing, software
9# distributed under the License is distributed on an "AS IS" BASIS,
10# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11# See the License for the specific language governing permissions and
12# limitations under the License.
13
14# 32-bits pointers optimization in Panda for objects => addresses usage low 4GB
15# We need use linker scripts for section replacement above 4GB
16# Note: AddressSanitizer reserves (mmap) addresses for its own needs,
17#       so we have difference start addresses for asan and default buildings
18function(panda_add_executable target)
19    # When using rapidcheck we should use linker scripts with
20    # definitions for exception handling sections
21    cmake_parse_arguments(ARG "RAPIDCHECK_ON" "" "" ${ARGN})
22
23    add_executable(${target} ${ARG_UNPARSED_ARGUMENTS})
24
25    if(PANDA_USE_32_BIT_POINTER AND NOT (PANDA_TARGET_MOBILE OR PANDA_TARGET_WINDOWS OR PANDA_TARGET_MACOS OR PANDA_TARGET_OHOS))
26        if(ARG_RAPIDCHECK_ON)
27            set(LINKER_SCRIPT_ARG "-Wl,-T,${PANDA_ROOT}/ldscripts/panda_test_asan.ld")
28        else()
29            set(LINKER_SCRIPT_ARG "-Wl,-T,${PANDA_ROOT}/ldscripts/panda.ld")
30        endif()
31        if(PANDA_ENABLE_ADDRESS_SANITIZER)
32            # For cross-aarch64 with ASAN with linker script we need use additional path-link
33            # Here we use default addresses space (without ASAN flag). It is nuance of cross-building.
34            if(PANDA_TARGET_ARM64)
35                set(LINKER_SCRIPT_ARG "-Wl,-rpath-link,${PANDA_SYSROOT}/lib ${LINKER_SCRIPT_ARG}")
36            else()
37                set(LINKER_SCRIPT_ARG "-Wl,--defsym,LSFLAG_ASAN=1 ${LINKER_SCRIPT_ARG}")
38            endif()
39        endif()
40        # We need use specific options for AMD64 building with Clang compiler
41        # because it is necessary for placement of sections above 4GB
42        if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND PANDA_TARGET_AMD64)
43            set(LINKER_SCRIPT_ARG "${LINKER_SCRIPT_ARG} -pie")
44            # -mcmodel=large with clang and asan on x64 leads to bugs in rapidcheck with high-mem mappings
45            # so for rapidcheck test binaries panda_test_asan.ld is used which does not require
46            # -mcmodel=large option
47            if(NOT ARG_RAPIDCHECK_ON)
48                target_compile_options(${target} PUBLIC "-mcmodel=large")
49            endif()
50        endif()
51        target_link_libraries(${target} ${LINKER_SCRIPT_ARG})
52    endif()
53endfunction()
54
55# This function need for non-SHARED libraries
56# It is necessary for 32-bits pointers via amd64 building with Clang compiler
57function(panda_set_lib_32bit_property target)
58    if(PANDA_USE_32_BIT_POINTER AND PANDA_TARGET_AMD64 AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
59        set_property(TARGET ${target} PROPERTY POSITION_INDEPENDENT_CODE ON)
60    endif()
61endfunction()
62