# 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 { outpipe = "sort" }
+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 locals.
$2 == "l" { next }
-$2 == "g" || $2 == "w" && NF == 7 {
- weak = ($2 == "w") ? "weak" : "strong";
+# 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 = strtonum("0x" $5);
+ size = $5;
+ sub(/^0*/, "", size);
+ size = " 0x" size;
version = $6;
- symbol = $7;
+ 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") {
- print symbol, version, weak, "TLS", size | outpipe;
+ type = "T";
}
else if (type == "D" && $4 == ".opd") {
- print symbol, version, weak, "FDESC" | outpipe;
+ 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 (type == "DO" && $4 == "*ABS*") {
- print symbol, version, weak, "ABS" | outpipe;
+ else if ($4 == "*ABS*") {
+ type = "A";
+ size = "";
}
else if (type == "DO") {
- print symbol, version, weak, "DATA", size | outpipe;
+ type = "D";
}
else if (type == "DF") {
- print symbol, version, weak, "FUNC" | outpipe;
+ 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 {
- print symbol, version, weak, "UNEXPECTED", type, $4, $5;
+ 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 : "");
+
+ if (version in versions) {
+ versions[version] = versions[version] "\n" desc;
+ }
+ else {
+ versions[version] = desc;
+ }
next;
}
{
print "Don't grok this line:", $0
}
+
+function emit(end) {
+ if (!end && (combine || ! parse_names || soname == ""))
+ return;
+ tofile = parse_names && !combine;
+
+ nverslist = 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;
+ }
+
+ if (tofile) {
+ out = prefix soname ".symlist";
+ if (soname in outfiles)
+ out = out "." ++outfiles[soname];
+ else
+ outfiles[soname] = 1;
+ printf "" > out;
+ }
+
+ split(verslist, order, "\n");
+ for (i = 1; i <= nverslist; ++i) {
+ version = order[i];
+
+ if (tofile) {
+ print version >> out;
+ close(out);
+ outpipe = "sort >> " out;
+ }
+ else {
+ if (combine)
+ print "";
+ print prefix version;
+ outpipe = "sort";
+ }
+ print versions[version] | outpipe;
+ close(outpipe);
+
+ delete versions[version];
+ }
+ for (version in versions)
+ delete versions[version];
+
+ if (tofile)
+ print "wrote", out, "for", sofullname;
+}
+
+END {
+ emit(1);
+}