On Tue, Aug 1, 2023 at 12:51 PM Fangrui Song <mask...@google.com> wrote: > > When using -mcmodel=medium, large data objects larger than the > -mlarge-data-threshold threshold are placed into large data sections > (.lrodata, .ldata, .lbss and some variants). GNU ld and ld.lld 17 place > .l* sections into separate output sections. If small and medium code > model object files are mixed, the .l* sections won't exert relocation > overflow pressure on sections in object files built with -mcmodel=small. > > However, when using -mcmodel=large, -mlarge-data-threshold doesn't > apply. This means that the .rodata/.data/.bss sections may exert > relocation overflow pressure on sections in -mcmodel=small object files. > > This patch allows -mcmodel=large to generate .l* sections and drops an > unneeded documentation restriction that the value must be the same. > > Link: https://groups.google.com/g/x86-64-abi/c/jnQdJeabxiU > ("Large data sections for the large code model") > > Signed-off-by: Fangrui Song <mask...@google.com> > > --- > Changes from v1 > (https://gcc.gnu.org/pipermail/gcc-patches/2023-April/616947.html): > * Clarify commit message. Add link to > https://groups.google.com/g/x86-64-abi/c/jnQdJeabxiU > > Changes from v2 > * Drop an uneeded limitation in the documentation. > > Changes from v3 > * Change scan-assembler directives to use \. to match literal . > --- > gcc/config/i386/i386.cc | 15 +++++++++------ > gcc/config/i386/i386.opt | 2 +- > gcc/doc/invoke.texi | 6 +++--- > gcc/testsuite/gcc.target/i386/large-data.c | 13 +++++++++++++ > 4 files changed, 26 insertions(+), 10 deletions(-) > create mode 100644 gcc/testsuite/gcc.target/i386/large-data.c > > [...]
Ping:)
