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|
BEGIN {
split(ENVIRON["SYMBOLS"], SYMBOLS);
}
/^ OS\/ABI:/ {
ABI = $NF
}
{
# Unstripped libc's have '.symtab' section as well, and
# we should stop processing when we hit that
if ($0 ~ "^Symbol (.*)table '.symtab'")
nextfile;
for (x in SYMBOLS) {
sym_regex = "^" SYMBOLS[x] "(@|$)";
# On x86, x86_64 and others, $8 is the symbol name, but on
# alpha, its $10, so rather use $NF, as it should be the
# last field
if ($NF ~ sym_regex) {
split($NF, symbol_array, /@|@@/);
# Don't add local symbols of versioned libc's
if (VERSIONED_LIBC && !symbol_array[2])
continue;
# Handle non-versioned libc's like uClibc ...
if (!symbol_array[2])
symbol_array[2] = "";
# We have a versioned libc
if (symbol_array[2] && !VERSIONED_LIBC)
VERSIONED_LIBC = 1;
ADD = 1;
# Check that we do not add duplicates
for (y in PROCESSED_SYMBOLS) {
if (y == $NF) {
ADD = 0;
break;
}
}
if (ADD) {
SYMBOL_LIST[symbol_array[2]] = SYMBOL_LIST[symbol_array[2]] " " symbol_array[1];
PROCESSED_SYMBOLS[$NF] = $NF;
}
}
sym_regex = "^__" SYMBOLS[x] "(@@|$)";
if (($5 == "WEAK") && ($NF ~ sym_regex)) {
split($NF, symbol_array, /@@/);
# Don't add local symbols of versioned libc's
if (VERSIONED_LIBC && !symbol_array[2])
continue;
# Blacklist __getcwd on FreeBSD
# Unleashed - May 2006
if ((symbol_array[1] == "__getcwd") && (ABI == "FreeBSD"))
continue;
# Handle non-versioned libc's like uClibc ...
if (!symbol_array[2])
symbol_array[2] = "";
# We have a versioned libc
if (symbol_array[2] && !VERSIONED_LIBC)
VERSIONED_LIBC = 1;
ADD = 1;
# Check that we do not add duplicates
for (y in PROCESSED_SYMBOLS) {
if (y == $NF) {
ADD = 0;
break;
}
}
if (ADD) {
SYMBOL_LIST[symbol_array[2]] = SYMBOL_LIST[symbol_array[2]] " " symbol_array[1];
PROCESSED_SYMBOLS[$NF] = $NF;
}
}
}
}
END {
for (sym_version in SYMBOL_LIST) {
if (sym_version)
VERSIONS = VERSIONS " " sym_version;
}
# We need the symbol versions sorted alphabetically ...
if (VERSIONS) {
split(VERSIONS, VERSION_LIST);
COUNT = asort(VERSION_LIST);
} else {
# Handle non-versioned libc's like uClibc ...
COUNT = 1;
}
for (i = 1; i <= COUNT; i++) {
if (VERSION_LIST[i]) {
sym_version = VERSION_LIST[i];
printf("%s {\n", sym_version);
} else {
# Handle non-versioned libc's like uClibc ...
sym_version = "";
printf("{\n");
}
printf(" global:\n");
split(SYMBOL_LIST[sym_version], sym_names);
for (x in sym_names) {
printf(" %s;\n", sym_names[x]);
}
if (!old_sym_version) {
printf(" local:\n");
printf(" *;\n");
printf("};\n");
} else {
printf("} %s;\n", old_sym_version);
}
old_sym_version = sym_version;
}
}
|
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