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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.
# Normalize columns.
/^[0-9a-fA-F]+ / { sub(/ /, " - ") }
# Skip undefineds.
$4 == "*UND*" { next }
# Skip locals.
$2 == "l" { next }
$2 == "g" || $2 == "w" && NF == 7 {
weak = $2;
type = $3;
size = $5;
sub(/^0*/, "", size);
size = " 0x" size;
version = $6;
symbol = $7;
gsub(/[()]/, "", version);
if (version == "GLIBC_PRIVATE") next;
if (type == "D" && $4 == ".tbss") {
type = "T";
}
else if (type == "D" && $4 == ".opd") {
type = "O";
size = "";
}
else if (type == "DO" && $4 == "*ABS*") {
type = "A";
size = "";
}
else if (type == "DO") {
type = "D";
}
else if (type == "DF") {
type = "F";
size = "";
}
else {
print symbol, version, weak, "?", type, $4, $5;
next;
}
# Disabled -- weakness should not matter to shared library ABIs any more.
#if (weak == "w") type = tolower(type);
desc = " " symbol " " type size;
if (version in versions) {
versions[version] = versions[version] "\n" desc;
}
else {
versions[version] = desc;
}
next;
}
# Header crapola.
NF == 0 || /DYNAMIC SYMBOL TABLE/ || /file format/ { next }
{
print "Don't grok this line:", $0
}
END {
nverlist = 0;
for (version in versions) {
if (nverslist == 0) {
verslist = version;
nverslist = 1;
continue;
}
split(verslist, s, "\n");
if (version < s[1]) {
verslist = version;
for (i = 1; i <= nverslist; ++i) {
verslist = verslist "\n" s[i];
}
}
else {
verslist = s[1];
for (i = 2; i <= nverslist; ++i) {
if (version < s[i]) break;
verslist = verslist "\n" s[i];
}
verslist = verslist "\n" version;
for (; i <= nverslist; ++i) {
verslist = verslist "\n" s[i];
}
}
++nverslist;
}
split(verslist, order, "\n");
for (i = 1; i <= nverslist; ++i) {
version = order[i];
print version;
outpipe = "sort";
print versions[version] | outpipe;
close(outpipe);
}
}
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