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08c0cce0d9
Every NXFLAT module imports __nxflat_abi_v2, and the loader resolves it against the symbol table exec() is given, like any other import. It was defined in binfmt/libnxflat, which is enough for a flat build, where the firmware and the applications are one image. In a protected build the table comes from the application, in the user image, which cannot see a kernel symbol: the user image fails to link with an undefined reference to __nxflat_abi_v2 as soon as an application generates its table from the modules' imports, as examples/nxflat does. A kernel build is the same, with one image per process. libc is linked into each of those images, so the marker is defined there now. Nothing else changes: its value is still never used. On mps3-an547:knsh under QEMU with CONFIG_NXFLAT and examples/nxflat, the user image links, and errno, hello, mutex, pthread and struct run. lm3s6965-ek:qemu-nxflat still runs every module to the end. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
150 lines
3.2 KiB
CMake
150 lines
3.2 KiB
CMake
# ##############################################################################
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# libs/libc/misc/CMakeLists.txt
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more contributor
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# license agreements. See the NOTICE file distributed with this work for
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# additional information regarding copyright ownership. The ASF licenses this
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# file to you under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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#
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# ##############################################################################
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# ##############################################################################
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# Add the internal C files to the build
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list(
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APPEND
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SRCS
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lib_bitmap.c
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lib_circbuf.c
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lib_creat.c
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lib_mknod.c
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lib_umask.c
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lib_utsname.c
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lib_getrandom.c
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lib_xorshift128.c
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lib_tea_encrypt.c
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lib_tea_decrypt.c
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lib_cxx_initialize.c
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lib_idr.c
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lib_impure.c
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lib_memfd.c
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lib_mutex.c
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lib_fchmodat.c
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lib_fstatat.c
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lib_getfullpath.c
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lib_openat.c
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lib_mkdirat.c
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lib_utimensat.c
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lib_mallopt.c
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lib_getnprocs.c)
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if(CONFIG_LIBC_TEMPBUFFER)
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list(APPEND SRCS lib_tempbuffer.c)
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endif()
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# Support for platforms that do not have long long types
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list(
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APPEND
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SRCS
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lib_umul32.c
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lib_umul64.c
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lib_umul32x64.c
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lib_uadd32x64.c
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lib_uadd64.c
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lib_usub64x32.c
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lib_usub64.c)
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if(CONFIG_PIPES)
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list(APPEND SRCS lib_mkfifo.c)
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endif()
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# Add the miscellaneous C files to the build
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list(
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APPEND
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SRCS
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lib_dumpbuffer.c
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lib_dumpvbuffer.c
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lib_fnmatch.c
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lib_debug.c
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lib_crc64.c
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lib_crc64emac.c
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lib_crc32.c
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lib_crc32h04c11db7.c
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lib_crc32hf4acfb13.c
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lib_crc16.c
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lib_crc16ccitt.c
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lib_crc16ibm.c
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lib_crc16xmodem.c
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lib_crc16h1021.c
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lib_crc16h8005.c
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lib_crc8.c
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lib_crc8ccitt.c
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lib_crc8h1d.c
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lib_crc8h2f.c
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lib_crc8rohc.c
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lib_crc8table.c
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lib_glob.c
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lib_backtrace.c
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lib_ftok.c
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lib_err.c
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lib_instrument.c)
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# Keyboard driver encoder/decoder
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if(CONFIG_LIBC_KBDCODEC)
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list(APPEND SRCS lib_kbdencode.c lib_kbddecode.c)
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endif()
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# SLCD driver encoder/decoder
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if(CONFIG_LIBC_SLCDCODEC)
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list(APPEND SRCS lib_slcdencode.c lib_slcddecode.c)
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endif()
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# The NXFLAT module ABI marker
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if(CONFIG_NXFLAT)
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list(APPEND SRCS lib_nxflat.c)
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endif()
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# Environment search path support
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if(CONFIG_LIBC_ENVPATH)
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list(APPEND SRCS lib_envpath.c)
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endif()
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if(CONFIG_FDSAN)
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list(APPEND SRCS lib_fdsan.c)
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endif()
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if(CONFIG_FDCHECK)
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list(APPEND SRCS lib_fdcheck.c)
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endif()
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if(CONFIG_SCHED_INSTRUMENTATION_DUMP)
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list(APPEND SRCS lib_note.c)
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endif()
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if(NOT CONFIG_LIBC_UNAME_DISABLE_TIMESTAMP)
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add_custom_target(
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always_rebuild_lib_utsname
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COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_SOURCE_DIR}/lib_utsname.c)
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add_dependencies(c always_rebuild_lib_utsname)
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endif()
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target_sources(c PRIVATE ${SRCS})
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