https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66609
Bug ID: 66609 Summary: [sh] Relative address expressions bind at as-time, even if symbol is weak Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: bugdal at aerifal dot cx Target Milestone: --- Minimal test case (compile with -fPIC and -Os or higher, for sh2 or later): __attribute__((__weak__,__visibility__("hidden"))) void foo() { } void bar() { foo(); } For the call from bar to foo, gcc generates: mov.l .L3,r1 braf r1 .LPCS0: nop .align 2 .L3: .long foo-(.LPCS0+2) Gas in turn ignores the fact that foo is weak and assembles the literal to a constant with no relocation. This is the following bug I just reported in binutils: https://sourceware.org/bugzilla/show_bug.cgi?id=18561 However, GCC can and probably should work around it, by instead generating the equivalent form that gas assembles correctly: .long foo@PCREL-(.LPCS0+2-.) This is easily changed at the following location: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/sh/sh.c;h=e5fcd7683ef7e06d56a10427d792ba018d1af884;hb=HEAD#l1662 and changing it seems to have solved the problem for me, but I did not yet test extensively. I'm not sure if the subsequent case for UNSPEC_PCREL_SYMOFF also needs changes.