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Correctly parse DW_FORM_ref_addr -- its format is different in Dwarf2

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vs Dwarf3 and later.  Fixes #298864.  (Tom Tromey, tromey@redhat.com)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12545
This commit is contained in:
Julian Seward 2012-04-29 11:35:37 +00:00
parent f53053e7c9
commit 3ba809deb6
1 changed files with 10 additions and 2 deletions
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12
coregrind/m_debuginfo/readdwarf3.c
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@ -1121,9 +1121,17 @@ void get_Form_contents ( /*OUT*/ULong* cts,
So for the moment we merely range-check, to see that they
actually do specify a plausible offset within this
object's .debug_info, and return the value unchanged.
In DWARF 2, DW_FORM_ref_addr is address-sized, but in
DWARF 3 and later, it is offset-sized.
*/
*cts = (ULong)(UWord)get_UWord(c);
*ctsSzB = sizeof(UWord);
if (cc->version == 2) {
*cts = (ULong)(UWord)get_UWord(c);
*ctsSzB = sizeof(UWord);
} else {
*cts = get_Dwarfish_UWord(c, cc->is_dw64);
*ctsSzB = cc->is_dw64 ? sizeof(ULong) : sizeof(UInt);
}
TRACE_D3("0x%lx", (UWord)*cts);
if (0) VG_(printf)("DW_FORM_ref_addr 0x%lx\n", (UWord)*cts);
if (/* the following 2 are surely impossible, but ... */