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Fix localplt check for GNU_IFUNC

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GNU_IFUNC are shown by readelf in 'Relocation section' value as
"symbol()" instead of expected hexadecimal value. This causes the
check-localplt script to ignore potential PLT stub begin generated
by wrong IFUNC usage.  This patch changes the localplt script to
emit such PLT cases.
This commit is contained in:
Adhemerval Zanella
2014-03-19 15:30:18 -05:00
parent 7578473bbe
commit 7bc5a74162
2 changed files with 13 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2014-03-25 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* scripts/localplt.awk: Check for PLT generated by internal IFUNC
calls.
2014-03-25 Adhemerval Zanella <azanella@linux.vnet.ibm.com> 2014-03-25 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Revert * nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Revert

10
scripts/localplt.awk
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@ -32,9 +32,15 @@ $1 == "Offset" && $2 == "Info" { in_relocs = 1; next }
NF == 0 { in_relocs = 0 } NF == 0 { in_relocs = 0 }
in_relocs && relocs_offset == jmprel_offset && NF >= 5 { in_relocs && relocs_offset == jmprel_offset && NF >= 5 {
symval = strtonum("0x" $4); # Relocations against GNU_IFUNC symbols are not shown as an hexadecimal
if (symval != 0) # value, but rather as the resolver symbol followed by ().
if ($4 ~ /\(\)/) {
print whatfile, $5 print whatfile, $5
} else {
symval = strtonum("0x" $4);
if (symval != 0)
print whatfile, $5
}
} }
in_relocs { next } in_relocs { next }