[Bug binutils/15721] New: [PATCH] elf32-msp430 10-bit PCREL offsets masked for 12 bits

[quandary at remstate dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15721

            Bug ID: 15721
           Summary: [PATCH] elf32-msp430 10-bit PCREL offsets masked for
                    12 bits
           Product: binutils
           Version: 2.24 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: quandary at remstate dot com
            Target: msp430

Created attachment 7107
  --> http://sourceware.org/bugzilla/attachment.cgi?id=7107&action=edit
Fix MSP430 HOWTO table to mask 10 bits on 10-bit address jumps

bfd/elf32-msp430.c declares a handful of jumps in its HOWTO which are 2-byte
opcodes with an embedded 10-bit address (*_10_PCREL, *_2x_PCREL). If you
assemble a simple program, such as:

start:
jmp late
early:
jmp end
late:
jmp early
end:

the final jump will be a negative offset. Because the HOWTO masks for these
jumps are 0xfff, the low bits of the opcode get junked -- in this case,
converting the final JMP into a JL opcode.

The fix is to use the correct mask (0x03ff).

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