Change Details

Fix https://github.com/llvm/llvm-project/issues/60392 ``` // a.cc void raise() { throw 42; } bool foo() { try { raise(); } catch (int) { return true; } return false; } int main() { foo(); } ``` ``` clang++ --target=x86_64-linux-gnu -fno-pic -no-pie -mcmodel=large -fuse-ld=lld -z notext a.cc -o a && ./a clang++ --target=aarch64-linux-gnu -fno-pic -no-pie -fuse-ld=lld -Wl,--dynamic-linker=/usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 -Wl,-rpath=/usr/aarch64-linux-gnu/lib -fuse-ld=lld -z notext a.cc -o a && ./a ``` Both commands fail because we produce a dynamic relocation for R_X86_64_64/R_AARCH64_ABS64 in .eh_frame which will be adjusted to a wrong offset by `SectionBase::getOffset` after D122459. Since GNU ld uses a canonical PLT entry instead of a dynamic relocation for .eh_frame, we follow suit as well to avoid the issue. mips64-eh-abs-reloc.s wants a dynamic relocation, so keep the original behavior for EM_MIPS.

Fix https://github.com/llvm/llvm-project/issues/60392 ``` // a.cc void raise() { throw 42; } bool foo() { try { raise(); } catch (int) { return true; } return false; } int main() { foo(); } ``` ``` clang++ --target=x86_64-linux-gnu -fno-pic -mcmodel=large -no-pie -fuse-ld=lld -z notext a.cc -o a && ./a clang++ --target=aarch64-linux-gnu -fno-pic -no-pie -fuse-ld=lld -Wl,--dynamic-linker=/usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 -Wl,-rpath=/usr/aarch64-linux-gnu/lib -z notext a.cc -o a && ./a ``` Both commands fail because we produce a dynamic relocation for R_X86_64_64/R_AARCH64_ABS64 in .eh_frame which will be adjusted to a wrong offset by `SectionBase::getOffset` after D122459. Since GNU ld uses a canonical PLT entry instead of a dynamic relocation for .eh_frame, we follow suit as well to avoid the issue. Mips has an ABI issue (https://github.com/llvm/llvm-project/issues/5837) and we don't implement GNU ld's DW_EH_PE_absptr conversion. mips64-eh-abs-reloc.s wants a dynamic relocation, so keep the original behavior for EM_MIPS.

Fix https://github.com/llvm/llvm-project/issues/60392 ``` // a.cc void raise() { throw 42; } bool foo() { try { raise(); } catch (int) { return true; } return false; } int main() { foo(); } ``` ``` clang++ --target=x86_64-linux-gnu -fno-pic -no-pie -mcmodel=largee -no-pie -fuse-ld=lld -z notext a.cc -o a && ./a clang++ --target=aarch64-linux-gnu -fno-pic -no-pie -fuse-ld=lld -Wl,--dynamic-linker=/usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 -Wl,-rpath=/usr/aarch64-linux-gnu/lib -fuse-ld=lld -z notext a.cc -o a && ./a ``` Both commands fail because we produce a dynamic relocation for R_X86_64_64/R_AARCH64_ABS64 in .eh_frame which will be adjusted to a wrong offset by `SectionBase::getOffset` after D122459. Since GNU ld uses a canonical PLT entry instead of a dynamic relocation for .eh_frame, we follow suit as well to avoid the issue. Mips has an ABI issue (https://github.com/llvm/llvm-project/issues/5837) and we mips64-eh-abs-reloc.s wants a dynamic relocation, so keep the original behaviordon't implement GNU ld's DW_EH_PE_absptr conversion. mips64-eh-abs-reloc.s wants a dynamic relocation, so keep the original behavior for EM_MIPS.