On 4/20/2021 6:12 PM, Stafford Horne wrote:
On Tue, Apr 20, 2021 at 05:20:39PM -0600, Jeff Law wrote:
On 4/18/2021 6:10 PM, Stafford Horne via Gcc-patches wrote:
When building libgeos we get an error with:
linux-uclibc/9.3.0/crtbeginS.o: in function `__do_global_dtors_aux':
crtstuff.c:(.text+0x118): relocation truncated to fit: R_OR1K_GOT16
against symbol `__cxa_finalize' defined in .text section in
/home/shorne/work/openrisc/3eb9f9d0f6d8274b2d19753c006bd83f7d536e3c/output/host/or1k-buildroot-linux-uclibc/sysroot/lib/libc.so.
This is caused by GOT code having a limit of 64k. In OpenRISC this
looks to be the only relocation code pattern to be limited to 64k.
This patch allows specifying a new option -mcmodel=large which can be
used to generate 2 more instructions to construct 32-bit addresses for
up to 4G GOTs.
gcc/ChangeLog:
PR 99783
* config/or1k/or1k-opts.h: New file.
* config/or1k/or1k.c (or1k_legitimize_address_1, print_reloc):
Support generating gotha relocations if -mcmodel=large is
specified.
* config/or1k/or1k.h (TARGET_CMODEL_SMALL, TARGET_CMODEL_LARGE):
New macros.
* config/or1k/or1k.opt (mcmodel=): New option.
* doc/invoke.text (OpenRISC Options): Document mcmodel.
Note you're the port maintainer, so you don't need approval to commit this
to GCC.
Thanks for confirming, I know that after Segher told me with some previous
patches. :)
For this series Giulio picked it up and tested it. We found some issues and I
am going to fix with a V2. I should commit that version, after the binutils
changes are in.
Sounds good. Thanks. Given we're making gcc-11 RCs you'll have to
decide if its worth the risk of introducing those changes this late in
the cycle is safe or not.
jeff
