7f7ff8c7d4
e.g. For CHRE dynamic nanoapps, pre-saving symbols that may be used later, no need recompiling.
Test: (unique & sorted)
$ nm ./hello_world.o | grep " U "
U __aeabi_unwind_cpp_pr1
U chreGetTime
U chreGetVersion
U chreLog
U __stack_chk_fail
U __stack_chk_guard
$ cat additional.txt -n
1 test_symbol
2 test_symbol
$ /PATH/TO/APPS/tools/mksymtab.sh ./hello_world.o MY_PREFIX -a additional.txt
#include <nuttx/compiler.h>
#include <nuttx/symtab.h>
extern void *__aeabi_unwind_cpp_pr1;
extern void *__stack_chk_fail;
extern void *__stack_chk_guard;
extern void *chreGetTime;
extern void *chreGetVersion;
extern void *chreLog;
extern void *test_symbol;
const struct symtab_s MY_PREFIX_exports[] =
{
{"__aeabi_unwind_cpp_pr1", &__aeabi_unwind_cpp_pr1},
{"__stack_chk_fail", &__stack_chk_fail},
{"__stack_chk_guard", &__stack_chk_guard},
{"chreGetTime", &chreGetTime},
{"chreGetVersion", &chreGetVersion},
{"chreLog", &chreLog},
{"test_symbol", &test_symbol},
};
const int MY_PREFIX_nexports = sizeof(MY_PREFIX_exports) / sizeof(struct symtab_s);
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
121 lines
3.9 KiB
Bash
Executable File
121 lines
3.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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############################################################################
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# apps/tools/mksymtab.sh
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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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export LC_ALL=C
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usage="Usage: $0 <imagedirpath> [symtabprefix [additionalsymbolspath]]"
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# Check for the required directory path
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dir=$1
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if [ -z "$dir" ]; then
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echo "ERROR: Missing <imagedirpath>"
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echo ""
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echo $usage
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exit 1
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fi
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# Get the symbol table prefix
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prefix=$2
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add_sym=$3
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# Extract all of the undefined symbols from the ELF files and create a
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# list of sorted, unique undefined variable names.
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varlist=`find $dir -name *-thunk.S 2>/dev/null | xargs grep -h asciz | cut -f3 | sort | uniq`
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if [ -z "$varlist" ]; then
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execlist=`find $dir -type f 2>/dev/null`
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if [ ! -z "$execlist" ]; then
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# Get all undefined symbol names
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varlist=`nm $execlist 2>/dev/null | fgrep ' U ' | sed -e "s/^[ ]*//g" | cut -d' ' -f2 | sort | uniq`
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# Get all defined symbol names
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deflist=`nm $execlist 2>/dev/null | fgrep -v -e ' U ' -e ':' | sed -e "s/^[0-9a-z]* //g" | cut -d' ' -f2 | sort | uniq`
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# Remove the intersection between them, and the remaining symbols are found in the main image
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common=`echo "$varlist" | tr ' ' '\n' | grep -Fxf <(echo "$deflist" | tr ' ' '\n') | tr '\n' ' '`
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if [ "x$common" != "x" ]; then
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varlist=`echo $varlist | sed "s/$common//g"`
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fi
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fi
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fi
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if [ "x$add_sym" != "x" ]; then
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if [ -f $add_sym ]; then
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varlist="${varlist}\n$(cat $add_sym)"
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elif [ -d $add_sym ]; then
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varlist="${varlist}\n$(find $add_sym -type f | xargs cat)"
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else
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echo $usage
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exit 1
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fi
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varlist=$(echo -e "${varlist}" | sort -u)
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fi
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# Now output the symbol table as a structure in a C source file. All
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# undefined symbols are declared as void* types. If the toolchain does
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# any kind of checking for function vs. data objects, then this could
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# failed
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echo "#include <nuttx/compiler.h>"
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echo "#include <nuttx/symtab.h>"
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echo ""
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for string in $varlist; do
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var=`echo $string | sed -e "s/\"//g"`
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echo "extern void *${var};"
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done
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echo ""
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if [ -z "$prefix" ]; then
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echo "#if defined(CONFIG_EXECFUNCS_HAVE_SYMTAB)"
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echo "const struct symtab_s CONFIG_EXECFUNCS_SYMTAB_ARRAY[] = "
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echo "#elif defined(CONFIG_NSH_SYMTAB)"
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echo "const struct symtab_s CONFIG_NSH_SYMTAB_ARRAYNAME[] = "
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echo "#else"
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echo "const struct symtab_s dummy_symtab[] = "
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echo "#endif"
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else
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echo "const struct symtab_s ${prefix}_exports[] = "
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fi
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echo "{"
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for string in $varlist; do
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var=`echo $string | sed -e "s/\"//g"`
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echo " {\"${var}\", &${var}},"
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done
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echo "};"
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echo ""
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if [ -z "$prefix" ]; then
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echo "#if defined(CONFIG_EXECFUNCS_HAVE_SYMTAB)"
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echo "const int CONFIG_EXECFUNCS_NSYMBOLS_VAR = sizeof(CONFIG_EXECFUNCS_SYMTAB_ARRAY) / sizeof(struct symtab_s);"
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echo "#elif defined(CONFIG_NSH_SYMTAB)"
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echo "const int CONFIG_NSH_SYMTAB_COUNTNAME = sizeof(CONFIG_NSH_SYMTAB_ARRAYNAME) / sizeof(struct symtab_s);"
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echo "#else"
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echo "const int dummy_nsymtabs = sizeof(dummy_symtab) / sizeof(struct symtab_s);"
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echo "#endif"
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else
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echo "const int ${prefix}_nexports = sizeof(${prefix}_exports) / sizeof(struct symtab_s);"
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fi
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