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| author | Ian Lance Taylor <ian@airs.com> | 1999-06-11 20:23:58 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@airs.com> | 1999-06-11 20:23:58 +0000 |
| commit | 44257b8b9dc15f3328edf0fc4647384a9bb2336e (patch) | |
| tree | a6389782035f4a78e0e79a5287962e65445214db | |
| parent | 76171f81c775f93a83498d00d8c10c8b0fef9983 (diff) | |
| download | gdb-44257b8b9dc15f3328edf0fc4647384a9bb2336e.zip gdb-44257b8b9dc15f3328edf0fc4647384a9bb2336e.tar.gz gdb-44257b8b9dc15f3328edf0fc4647384a9bb2336e.tar.bz2 | |
* reloc.c (_bfd_relocate_contents): Permit bitfield relocations to
wrap if the relocation covers the high bit of an address.
| -rw-r--r-- | bfd/ChangeLog | 3 | ||||
| -rw-r--r-- | bfd/reloc.c | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index e5edd46..0606b90 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,8 @@ 1999-06-11 Ian Lance Taylor <ian@zembu.com> + * reloc.c (_bfd_relocate_contents): Permit bitfield relocations to + wrap if the relocation covers the high bit of an address. + * dwarf2.c (decode_line_info): Remove unused variable first_time. 1999-06-10 Jakub Jelinek <jj@ultra.linux.cz> diff --git a/bfd/reloc.c b/bfd/reloc.c index 9e8735e..360c1b2 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -1560,6 +1560,15 @@ _bfd_relocate_contents (howto, input_bfd, relocation, location) /* We just assume (b & ~ fieldmask) == 0. */ + /* We explicitly permit wrap around if this relocation + covers the high bit of an address. The Linux kernel + relies on it, and it is the only way to write assembler + code which can run when loaded at a location 0x80000000 + away from the location at which it is linked. */ + if (howto->bitsize + rightshift + == bfd_arch_bits_per_address (input_bfd)) + break; + sum = a + b; if (sum < a || (sum & ~ fieldmask) != 0) { |