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| author | Nick Clifton <nickc@redhat.com> | 1999-08-11 10:56:35 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 1999-08-11 10:56:35 +0000 |
| commit | 230801466aa11b7c986db17c3f25f8df0390444e (patch) | |
| tree | 10a9186cc0c467c4e7508d8c2eff89afb727c0a0 /bfd/elf32-arm.h | |
| parent | b100be66954be1dd02491bc9a3a7be9b0c28db97 (diff) | |
| download | gdb-230801466aa11b7c986db17c3f25f8df0390444e.zip gdb-230801466aa11b7c986db17c3f25f8df0390444e.tar.gz gdb-230801466aa11b7c986db17c3f25f8df0390444e.tar.bz2 | |
Check for overflow on R_ARM_PC24 relocs.
Diffstat (limited to 'bfd/elf32-arm.h')
| -rw-r--r-- | bfd/elf32-arm.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/bfd/elf32-arm.h b/bfd/elf32-arm.h index 78ecae1..6b2cabd 100644 --- a/bfd/elf32-arm.h +++ b/bfd/elf32-arm.h @@ -1223,10 +1223,16 @@ elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, value -= 8; } } + + /* Perform a signed range check. */ + signed_addend = value; + signed_addend >>= howto->rightshift; + if (signed_addend > ((bfd_signed_vma)(howto->dst_mask >> 1)) + || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) + return bfd_reloc_overflow; - value >>= howto->rightshift; - value &= howto->dst_mask; - value |= (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); + value = (signed_addend & howto->dst_mask) + | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); break; case R_ARM_ABS32: |