musl - musl - an implementation of the standard library for Linux-based systems

fix fdpic regression in dynamic linker with overly smart compilers

at least gcc 9 broke execution of DT_INIT/DT_FINI for fdpic archs (presently only sh) by recognizing that the stores to the compound-literal function descriptor constructed to call them were dead stores. there's no way to make a "may_alias function", so instead launder the descriptor through an asm-statement barrier. in practice just making the compound literal volatile seemed to have worked too, but this should be less of a hack and more accurately convey the semantics of what transformations are not valid.

Diffstat

1 files changed, 8 insertions, 2 deletions