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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>
107 lines
3.1 KiB
Text
107 lines
3.1 KiB
Text
############################################################################
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# libs/libc/misc/Make.defs
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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
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of 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
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# under the License.
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#
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############################################################################
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# Add the internal C files to the build
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CSRCS += lib_bitmap.c lib_circbuf.c lib_creat.c lib_mknod.c lib_umask.c
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CSRCS += lib_utsname.c lib_getrandom.c lib_xorshift128.c lib_tea_encrypt.c
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CSRCS += lib_tea_decrypt.c lib_cxx_initialize.c lib_impure.c lib_memfd.c
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CSRCS += lib_mutex.c lib_fchmodat.c lib_fstatat.c lib_getfullpath.c
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CSRCS += lib_openat.c lib_mkdirat.c lib_utimensat.c lib_mallopt.c
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CSRCS += lib_idr.c lib_getnprocs.c
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ifeq ($(CONFIG_LIBC_TEMPBUFFER),y)
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CSRCS += lib_tempbuffer.c
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endif
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# Support for platforms that do not have long long types
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CSRCS += lib_umul32.c lib_umul64.c lib_umul32x64.c
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CSRCS += lib_uadd32x64.c lib_uadd64.c lib_usub64x32.c lib_usub64.c
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ifeq ($(CONFIG_PIPES),y)
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CSRCS += lib_mkfifo.c
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endif
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# Add the miscellaneous C files to the build
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CSRCS += lib_dumpbuffer.c lib_dumpvbuffer.c lib_fnmatch.c lib_debug.c
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CSRCS += lib_crc64.c lib_crc32.c lib_crc16.c lib_crc16ccitt.c
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CSRCS += lib_crc8.c lib_crc8ccitt.c lib_crc8table.c lib_crc8rohc.c
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CSRCS += lib_crc8h1d.c lib_crc8h2f.c lib_crc16h1021.c lib_crc16h8005.c
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CSRCS += lib_crc32h04c11db7.c lib_crc32hf4acfb13.c lib_crc64emac.c
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CSRCS += lib_backtrace.c lib_ftok.c lib_err.c lib_instrument.c lib_glob.c
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CSRCS += lib_crc16ibm.c lib_crc16xmodem.c
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# Keyboard driver encoder/decoder
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ifeq ($(CONFIG_LIBC_KBDCODEC),y)
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CSRCS += lib_kbdencode.c lib_kbddecode.c
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endif
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# SLCD driver encoder/decoder
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ifeq ($(CONFIG_LIBC_SLCDCODEC),y)
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CSRCS += lib_slcdencode.c lib_slcddecode.c
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endif
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# The NXFLAT module ABI marker
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ifeq ($(CONFIG_NXFLAT),y)
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CSRCS += lib_nxflat.c
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endif
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# Environment search path support
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ifeq ($(CONFIG_LIBC_ENVPATH),y)
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CSRCS += lib_envpath.c
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endif
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# Fdsan support
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ifeq ($(CONFIG_FDSAN),y)
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CSRCS += lib_fdsan.c
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endif
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# Fdcheck support
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ifeq ($(CONFIG_FDCHECK),y)
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CSRCS += lib_fdcheck.c
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endif
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# Note support
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ifeq ($(CONFIG_SCHED_INSTRUMENTATION_DUMP),y)
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CSRCS += lib_note.c
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endif
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# To ensure uname information is newest,
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# add lib_utsname.o to phony target for force rebuild
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ifeq ($(CONFIG_LIBC_UNAME_DISABLE_TIMESTAMP),)
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.PHONY: bin$(DELIM)lib_utsname$(OBJEXT) kbin$(DELIM)lib_utsname$(OBJEXT)
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endif
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# Add the misc directory to the build
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DEPPATH += --dep-path misc
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VPATH += :misc
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