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[Bug ld/26164] New: powerpc64le: ld requires a nop after a branch to ano


From: tuliom at ascii dot art.br
Subject: [Bug ld/26164] New: powerpc64le: ld requires a nop after a branch to another compilation unit
Date: Wed, 24 Jun 2020 13:09:08 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=26164

            Bug ID: 26164
           Summary: powerpc64le: ld requires a nop after a branch to
                    another compilation unit
           Product: binutils
           Version: 2.35 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: tuliom at ascii dot art.br
  Target Milestone: ---

During the link stage for libc.so, the linker throws the following error when
the code is assembled with -mpower10 or -mfuture.

sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S:163:(.text+0xfc): call
to `__GI_exit' lacks nop, can't restore toc; (toc save/adjust stub)

The affected code is:

 160         li    r3,-1
 161 L(do_exit):
 162 #ifdef SHARED
 163         b     JUMPTARGET(__GI_exit);
 164 #else
 165         b     JUMPTARGET(exit);
 166         nop
 167 #endif
 168         b    L(do_exit)

The original code is available here:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S;hb=HEAD#l163

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