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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 | 0c53924562c5f52272485d7195b18f7b499681cf (patch) | |
| tree | fa91da1a45d90b4d0fb59d4bf2da092a6dc7baad /bfd/reloc.c | |
| parent | c2506ba82ca2c0dbee7fb79197738da4b735f053 (diff) | |
| download | gdb-0c53924562c5f52272485d7195b18f7b499681cf.tar.gz | |
* reloc.c (_bfd_relocate_contents): Permit bitfield relocations to
wrap if the relocation covers the high bit of an address.
Diffstat (limited to 'bfd/reloc.c')
| -rw-r--r-- | bfd/reloc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/bfd/reloc.c b/bfd/reloc.c index 9e8735e5ed6..360c1b2799b 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) { |