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# This is an awk script to process the output of elf/check-localplt.
# The first file argument is the file of expected results.
# Each line is either a comment starting with # or it looks like:
# libfoo.so: function
# or
# libfoo.so: function + {RELA|REL} RELOC
# or
# libfoo.so: function ?
# The first entry means that one is required.
# The second entry means that one is required and relocation may also be
# {RELA|REL} RELOC.
# The third entry means that a PLT entry for function is optional in
# libfoo.so.
# The second file argument is - and this (stdin) receives the output
# of the check-localplt program.
BEGIN { result = 0 }
FILENAME != "-" && /^#/ { next }
FILENAME != "-" {
if (NF == 5 && $3 == "+" && ($4 == "RELA" || $4 == "REL")) {
accept_type[$1 " " $2] = $4;
accept_reloc[$1 " " $2] = $5;
} else if (NF != 2 && !(NF == 3 && $3 == "?")) {
printf "%s:%d: bad data line: %s\n", FILENAME, FNR, $0 > "/dev/stderr";
result = 2;
} else {
accept[$1 " " $2] = NF == 2;
}
next;
}
NF != 2 && !(NF == 4 && ($3 == "RELA" || $3 == "REL")) {
print "Unexpected output from check-localplt:", $0 > "/dev/stderr";
result = 2;
next
}
{
key = $1 " " $2
if ($3 == "RELA" || $3 == "REL") {
# Entries like:
# libc.so: free + RELA R_X86_64_GLOB_DAT
# may be ignored.
if (key in accept_type && accept_type[key] == $3 && accept_reloc[key] == $4) {
# Match
# libc.so: free + RELA R_X86_64_GLOB_DAT
delete accept_type[key]
}
} else if (NF == 2 && key in accept_reloc) {
# Match
# libc.so: free
# against
# libc.so: free + RELA R_X86_64_GLOB_DAT
if (key in accept_type)
delete accept_type[key]
} else if (key in accept) {
delete accept[key]
} else {
print "Extra PLT reference:", $0;
if (result == 0)
result = 1;
}
}
END {
for (key in accept) {
if (accept[key]) {
# It's mandatory.
print "Missing required PLT reference:", key;
result = 1;
}
}
for (key in accept_type) {
# It's mandatory.
print "Missing required PLT or " accept_reloc[key] " reference:", key;
result = 1;
}
exit(result);
}
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