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3640654575
The previous approach uses readelf -DWs, which does not produce a stable output format (older binutils versions do not include symbol version information). This commit re-uses scripts/abilist.awk with a tweak to include GLIBC_PRIVATE symbols. This awk script is based on objdump -T output, which appears to be stable over time. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
149 lines
3.0 KiB
Awk
149 lines
3.0 KiB
Awk
# This awk script processes the output of objdump --dynamic-syms
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# into a simple format that should not change when the ABI is not changing.
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BEGIN {
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if (combine_fullname)
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combine = 1;
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if (combine)
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parse_names = 1;
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}
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# Per-file header.
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/[^ :]+\.so\.[0-9.]+:[ ]+.file format .*$/ {
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emit(0);
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seen_opd = 0;
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sofullname = $1;
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sub(/:$/, "", sofullname);
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soname = sofullname;
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sub(/^.*\//, "", soname);
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sub(/\.so\.[0-9.]+$/, "", soname);
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suppress = ((filename_regexp != "" && sofullname !~ filename_regexp) \
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|| (libname_regexp != "" && soname !~ libname_regexp));
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next
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}
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suppress { next }
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# Normalize columns.
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/^[0-9a-fA-F]+ / { sub(/ /, " - ") }
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# Skip undefineds.
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$4 == "*UND*" { next }
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# Skip locals.
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$2 == "l" { next }
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# If the target uses ST_OTHER, it will be output before the symbol name.
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$2 == "g" || $2 == "w" && (NF == 7 || NF == 8) {
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type = $3;
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size = $5;
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sub(/^0*/, "", size);
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if (size == "") {
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size = " 0x0";
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} else {
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size = " 0x" size;
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}
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version = $6;
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symbol = $NF;
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gsub(/[()]/, "", version);
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# binutils versions up through at least 2.23 have some bugs that
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# caused STV_HIDDEN symbols to appear in .dynsym, though that is useless.
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if (NF > 7 && $7 == ".hidden") next;
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if (version == "GLIBC_PRIVATE" && !include_private) next;
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desc = "";
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if (type == "D" && ($4 == ".tbss" || $4 == ".tdata")) {
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type = "T";
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}
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else if (type == "D" && $4 == ".opd") {
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type = "F";
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size = "";
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if (seen_opd < 0)
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type = "O";
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seen_opd = 1;
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}
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else if (type == "D" && NF == 8 && $7 == "0x80") {
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# Alpha functions avoiding plt entry in users
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type = "F";
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size = "";
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seen_opd = -1;
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}
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else if ($4 == "*ABS*") {
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next;
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}
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else if (type == "D") {
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# Accept unchanged.
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}
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else if (type == "DO") {
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type = "D";
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}
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else if (type == "DF") {
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if (symbol ~ /^\./ && seen_opd >= 0)
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next;
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seen_opd = -1;
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type = "F";
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size = "";
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}
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else if (type == "iD" && ($4 == ".text" || $4 == ".opd")) {
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# Indirect functions.
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type = "F";
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size = "";
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}
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else {
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print "ERROR: Unable to handle this type of symbol:", $0
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exit 1
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}
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if (desc == "")
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desc = symbol " " type size;
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if (combine)
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version = soname " " version (combine_fullname ? " " sofullname : "");
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# Append to the string which collects the results.
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descs = descs version " " desc "\n";
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next;
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}
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# Header crapola.
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NF == 0 || /DYNAMIC SYMBOL TABLE/ || /file format/ { next }
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{
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print "ERROR: Unable to interpret this line:", $0
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exit 1
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}
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function emit(end) {
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if (!end && (combine || ! parse_names || soname == ""))
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return;
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tofile = parse_names && !combine;
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if (tofile) {
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out = prefix soname ".symlist";
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if (soname in outfiles)
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out = out "." ++outfiles[soname];
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else
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outfiles[soname] = 1;
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outpipe = "LC_ALL=C sort -u > " out;
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} else {
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outpipe = "LC_ALL=C sort -u";
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}
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printf "%s", descs | outpipe;
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descs = "";
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if (tofile)
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print "wrote", out, "for", sofullname;
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}
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END {
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emit(1);
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}
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