| Message ID | 20191218031920.6414-1-richard.henderson@linaro.org |
|---|---|
| Headers | show |
| Series | configure: Improve PIE and other linkage | expand |
On 2019-12-17, Richard Henderson wrote: >This begins by dropping the -Ttext-segment stuff, which Fangrui Song >correctly points out does not work with lld. But it's also obsolete, >so instead of adding support for lld's --image-base, remove it all. > >Then, remove some other legacy random addresses that were supposed >to apply to softmmu, but didn't really make any sense, and aren't >used anyway when PIE is used, which is the default with a modern >linux distribution. > >Then, clean up some of the configure logic surrounding PIE, and its >current non-application to non-x86. > >Finally, add support for static-pie linking. > > >r~ > > >Richard Henderson (7): > configure: Drop adjustment of textseg > tcg: Remove softmmu code_gen_buffer fixed address > configure: Do not force pie=no for non-x86 > configure: Always detect -no-pie toolchain support > configure: Unnest detection of -z,relro and -z,now > configure: Override the os default with --disable-pie > configure: Support -static-pie if requested > > accel/tcg/translate-all.c | 37 ++---------- > configure | 120 ++++++++++++-------------------------- > 2 files changed, 41 insertions(+), 116 deletions(-) > >-- >2.20.1 Thank you for the patch set. I hope this will make that lld qemu user happy. How will this patch set affect statically linked user mode binaries? (qemu-user-static packages on Debian, CentOS, ...)
On 12/17/19 9:28 PM, Fangrui Song wrote: > How will this patch set affect statically linked user mode binaries? > (qemu-user-static packages on Debian, CentOS, ...) The statically linked user mode binaries will still build, and should still be able to run any guest binary that could be run before. If the distribution is new enough to support -static-pie, then that will be automatically used. r~