| commit | 9b1b0a46dd3c9704a49a5ba1950212c6fff7917d | [log] [tgz] |
|---|---|---|
| author | Austin Clements <austin@google.com> | Thu Dec 18 11:40:48 2014 -0500 |
| committer | Austin Clements <austin@google.com> | Thu Dec 18 22:32:18 2014 +0000 |
| tree | d5fd9a5657ed8e5332e226498038fa33bf354d3e | |
| parent | 15c67e21daee0a5055c8fc0144e7efe0345d1929 [diff] |
liblink: fail for too-large register offset constants
Previously, liblink would silently truncate register offset constants
to 32 bits. For example,
MOVD $0x200000004(R2),R3
would assemble to
addis r31,r2,0
addi r3,r31,4
To fix this, limit C_LACON to 32 bit (signed) offsets and introduce a
new C_DACON operand type for larger register offsets. We don't
implement this currently, but at least liblink will now give an error
if it encounters an address like this.
Change-Id: I8e87def8cc4cc5b75498b0fb543ac7666cf2964e
Reviewed-on: https://go-review.googlesource.com/1758
Reviewed-by: Minux Ma <minux@golang.org>
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