https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118715
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2025-02-04
Status|UNCONFIRMED |ASSIGNED
CC| |clyon at gcc dot gnu.org
--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
>From the linker side, I think the problem is that the first time
using_thumb_only() is called, it returns false, so
elf32_arm_create_dynamic_sections does not update htab->plt_header_size and
htab->plt_entry_size.
Under gdb I noticed that the first call returns false, the next ones correctly
return true.
>From gdb, I started the linker with the following args (grabbed from -Wl,-debug
etc...)
-plugin XXX/liblto_plugin.so
-plugin-opt=XXX/lto-wrapper
-plugin-opt=-fresolution=pr118715.exe.lto.res
--sysroot=XXX
--build-id -shared -X -o pr118715.exe.lto -e _start
-L YYY
pr118715.exe.lto-pr118715.o
and COLLECT_GCC_OPTIONS="'-O2' '-Wall' '-Wextra' '-fPIC' '-ffreestanding'
'-nostdlib' '-mthumb' '-mcpu=cortex-m4' '-e' '_start' '-shared' '-o'
'pr118715.exe.lto' '-save-temps' '-flto' '-mfloat-abi=hard'
'-mlibarch=armv7e-m+fp' '-march=armv7e-m+fp' '-dumpdir' 'pr118715.exe.lto.'"
So some initialization is not properly taking place and the -mcpu=cortex-m4
option is not taken into account by the (LTO) linker soon enough
