https://sourceware.org/bugzilla/show_bug.cgi?id=18561
Bug ID: 18561
Summary: sh assembler wrongly constant-folds address
expressions containing weak symbols
Product: binutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: bugdal at aerifal dot cx
Target Milestone: ---
Minimal test case:
.global a
.global b
.weak a
.align 2
a: .long 0
b: .long a-.
The output should contain a R_SH_REL32 relocation, but instead it contains a
constant. This bug affects gcc, which produces such expressions for intra-DSO
PIC function calls; if the callee has a local weak definition; strong
definitions will fail to override at link time.
This could be fixed on the GCC side by having gcc explicitly produce @PCREL
references rather than using arithmetic with ., but either way I think this is
a serious gas bug that needs to be fixed.
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