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# This awk script processes the output of objdump --dynamic-syms
# into a simple format that should not change when the ABI is not changing.
BEGIN {
if (combine_fullname)
combine = 1;
if (combine)
parse_names = 1;
}
# Per-file header.
/[^ :]+\.so\.[0-9.]+:[ ]+.file format .*$/ {
emit(0);
seen_opd = 0;
sofullname = $1;
sub(/:$/, "", sofullname);
soname = sofullname;
sub(/^.*\//, "", soname);
sub(/\.so\.[0-9.]+$/, "", soname);
suppress = ((filename_regexp != "" && sofullname !~ filename_regexp) \
|| (libname_regexp != "" && soname !~ libname_regexp));
next
}
suppress { next }
# Normalize columns.
/^[0-9a-fA-F]+ / { sub(/ /, " - ") }
# Skip undefineds.
$4 == "*UND*" { next }
# Skip locals.
$2 == "l" { next }
# If the target uses ST_OTHER, it will be output before the symbol name.
$2 == "g" || $2 == "w" && (NF == 7 || NF == 8) {
weak = $2;
type = $3;
size = $5;
sub(/^0*/, "", size);
size = " 0x" size;
version = $6;
symbol = $NF;
gsub(/[()]/, "", version);
# binutils versions up through at least 2.23 have some bugs that
# caused STV_HIDDEN symbols to appear in .dynsym, though that is useless.
if (NF > 7 && $7 == ".hidden") next;
if (version == "GLIBC_PRIVATE") next;
desc = "";
if (type == "D" && $4 == ".tbss") {
type = "T";
}
else if (type == "D" && $4 == ".opd") {
type = "F";
size = "";
if (seen_opd < 0)
type = "O";
seen_opd = 1;
}
else if (type == "D" && NF == 8 && $7 == "0x80") {
# Alpha functions avoiding plt entry in users
type = "F";
size = "";
seen_opd = -1;
}
else if ($4 == "*ABS*") {
next;
}
else if (type == "DO") {
type = "D";
}
else if (type == "DF") {
if (symbol ~ /^\./ && seen_opd >= 0)
next;
seen_opd = -1;
type = "F";
size = "";
}
else if (type == "iD" && ($4 == ".text" || $4 == ".opd")) {
# Indirect functions.
type = "F";
size = "";
}
else {
desc = symbol " " version " " weak " ? " type " " $4 " " $5;
}
if (size == " 0x") {
desc = symbol " " version " " weak " ? " type " " $4 " " $5;
}
# Disabled -- weakness should not matter to shared library ABIs any more.
#if (weak == "w") type = tolower(type);
if (desc == "")
desc = symbol " " type size;
if (combine)
version = soname " " version (combine_fullname ? " " sofullname : "");
# Append to the string which collects the results.
descs = descs version " " desc "\n";
next;
}
# Header crapola.
NF == 0 || /DYNAMIC SYMBOL TABLE/ || /file format/ { next }
{
print "Don't grok this line:", $0
}
function emit(end) {
if (!end && (combine || ! parse_names || soname == ""))
return;
tofile = parse_names && !combine;
if (tofile) {
out = prefix soname ".symlist";
if (soname in outfiles)
out = out "." ++outfiles[soname];
else
outfiles[soname] = 1;
outpipe = "LC_ALL=C sort -u > " out;
} else {
outpipe = "LC_ALL=C sort -u";
}
printf "%s", descs | outpipe;
descs = "";
if (tofile)
print "wrote", out, "for", sofullname;
}
END {
emit(1);
}
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