https://github.com/MaskRay created https://github.com/llvm/llvm-project/pull/81224
https://reviews.llvm.org/D150510 places .lrodata before .rodata to minimize the number of permission transitions in the memory image. However, this layout is not ideal for -fno-pic code (which is still important). Small code model -fno-pic code has R_X86_64_32S relocations with a range of [0,2**31) (if we ignore the negative area). Placing `.lrodata` earlier exerts relocation pressure on such code. Non-x86 64-bit architectures generally have a similar [0,2**31) limitation if they don't use PC-relative relocations. If we place .lrodata later, two layouts are appealing: * .bss/.lbss/.lrodata/.ldata (GNU ld) * .bss/.ldata/.lbss/.lrodata The GNU ld style has the nice property that there is only one BSS (except .tbss/.relro_padding). Let's match GNU ld. While here, also place `_edata` at a location similar to GNU ld. _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
