https://sourceware.org/bugzilla/show_bug.cgi?id=26126
Bug ID: 26126
Summary: aarch64/mips: reject symbolic operand of an
instruction taking an immediate operand
Product: binutils
Version: 2.35 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: i at maskray dot me
Target Milestone: ---
Rigid:
% powerpc64le-linux-gnu-as <<< 'or 3, 3, start-.; start:' # good
% powerpc64le-linux-gnu-as <<< 'or 3, 3, start; start:'
{standard input}: Assembler messages:
{standard input}:1: Error: unsupported relocation against .text
Permissive:
% aarch64-linux-gnu-as <<< 'orr w3, w3, start; start:'
# no relocation
% mipsel-linux-gnu-as <<< 'ori $3, $3, start; start:'
% llvm-objdump -dr
...
0: 04 00 63 34 ori $3, $3, 4
: R_MIPS_LO16 .text
% mips64el-linux-gnuabi64-as <<< 'ori $3, $3, start; start:' # succeeded
% llvm-objdump -dr
...
0: 00 00 63 34 ori $3, $3, 0 <.text>
: R_MIPS_LO16/R_MIPS_NONE/R_MIPS_NONE
.text+0x4
On most RISC architectures, the immediate bits cannot encode an arbitrary
symbolic value (32-bit/64-bit). It probably makes sense rejecting assembling
the instruction.
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