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| author | Nick Clifton <nickc@redhat.com> | 2009-10-13 08:55:31 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2009-10-13 08:55:31 +0000 |
| commit | b2b7424819829f8f0377907b3f03319a20e6355d (patch) | |
| tree | d0f4aeca7db867d05d7e7e10443c633e8d2271fb /gas/config/tc-m68k.c | |
| parent | 279017b761dcda4b0e94e6c91676afb091c85cbc (diff) | |
| download | gdb-b2b7424819829f8f0377907b3f03319a20e6355d.zip gdb-b2b7424819829f8f0377907b3f03319a20e6355d.tar.gz gdb-b2b7424819829f8f0377907b3f03319a20e6355d.tar.bz2 | |
gas:
2009-10-07 Vincent Riviere <vincent.riviere@freesbee.fr>
PR gas/3041
* config/tc-m68k.c (tc_gen_reloc): Fix addend for relocations
located in data section an referencing a weak symbol.
gas/testsuite:
2009-10-07 Vincent Riviere <vincent.riviere@freesbee.fr>
PR gas/3041
* gas/m68k/all.exp: Added "p3041data".
* gas/m68k/p3041.d, gas/m68k/p3041.s: Added tests of weak references
from text section to all possible sections.
* gas/m68k/p3041data.d, gas/m68k/p3041data.s: New test. Check weak
references from data section.
Diffstat (limited to 'gas/config/tc-m68k.c')
| -rw-r--r-- | gas/config/tc-m68k.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/gas/config/tc-m68k.c b/gas/config/tc-m68k.c index 7bb6828..9616ba5 100644 --- a/gas/config/tc-m68k.c +++ b/gas/config/tc-m68k.c @@ -1326,10 +1326,29 @@ tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) && fixp->fx_addsy && S_IS_WEAK (fixp->fx_addsy) && ! bfd_is_und_section (S_GET_SEGMENT (fixp->fx_addsy))) - /* PR gas/3041 Adjust addend in order to force bfd_install_relocation() - to put the symbol offset into frags referencing a weak symbol. */ - reloc->addend = fixp->fx_addnumber - - (S_GET_VALUE (fixp->fx_addsy) * 2); + { + /* PR gas/3041 References to weak symbols must be treated as extern + in order to be overridable by the linker, even if they are defined + in the same object file. So the original addend must be written + "as is" into the output section without further processing. + The addend value must be hacked here in order to force + bfd_install_relocation() to write the original value into the + output section. + 1) MD_APPLY_SYM_VALUE() is set to 1 for m68k/a.out, so the symbol + value has already been added to the addend in fixup_segment(). We + have to remove it. + 2) bfd_install_relocation() will incorrectly treat this symbol as + resolved, so it will write the symbol value plus its addend and + section VMA. As a workaround we can tweak the addend value here in + order to get the original value in the section after the call to + bfd_install_relocation(). */ + reloc->addend = fixp->fx_addnumber + /* Fix because of MD_APPLY_SYM_VALUE() */ + - S_GET_VALUE (fixp->fx_addsy) + /* Fix for bfd_install_relocation() */ + - (S_GET_VALUE (fixp->fx_addsy) + + S_GET_SEGMENT (fixp->fx_addsy)->vma); + } else reloc->addend = 0; #else |