I'm working on Guarded Control Stack support for aarch64 and have a set of patches that are needed for GCS but seem useful without it so makes sense to review them separately from the rest of the GCS work.
GCS support will depend on the linux ABI that is under discussion at https://lore.kernel.org/lkml/20230807-arm64-gcs-v4-0-68cfa37f9...@kernel.org/ so it will come later. Richard Sandiford (1): Handle epilogues that contain jumps Szabolcs Nagy (10): aarch64: AARCH64_ISA_RCPC was defined twice aarch64: Use br instead of ret for eh_return aarch64: Do not force a stack frame for EH returns aarch64: Add eh_return compile tests aarch64: Fix pac-ret eh_return tests aarch64: Disable branch-protection for pcs tests aarch64,arm: Remove accepted_branch_protection_string aarch64,arm: Fix branch-protection= parsing aarch64: Fix branch-protection error message tests aarch64,arm: Move branch-protection data to targets gcc/config/aarch64/aarch64-opts.h | 6 +- gcc/config/aarch64/aarch64-protos.h | 2 +- gcc/config/aarch64/aarch64.cc | 211 +++++++++------- gcc/config/aarch64/aarch64.h | 12 +- gcc/config/aarch64/aarch64.md | 8 + gcc/config/arm/aarch-common-protos.h | 5 +- gcc/config/arm/aarch-common.cc | 229 +++++------------- gcc/config/arm/aarch-common.h | 25 +- gcc/config/arm/arm-c.cc | 2 - gcc/config/arm/arm.cc | 57 ++++- gcc/config/arm/arm.opt | 3 - gcc/function.cc | 10 + .../gcc.target/aarch64/aapcs64/func-ret-1.c | 1 + .../gcc.target/aarch64/aapcs64/func-ret-2.c | 1 + .../gcc.target/aarch64/aapcs64/func-ret-3.c | 1 + .../gcc.target/aarch64/aapcs64/func-ret-4.c | 1 + .../aarch64/aapcs64/func-ret-64x1_1.c | 1 + .../aarch64/branch-protection-attr.c | 6 +- .../aarch64/branch-protection-option.c | 2 +- .../gcc.target/aarch64/eh_return-2.c | 9 + .../gcc.target/aarch64/eh_return-3.c | 14 ++ .../aarch64/return_address_sign_1.c | 13 +- .../aarch64/return_address_sign_2.c | 17 +- .../aarch64/return_address_sign_b_1.c | 11 - .../aarch64/return_address_sign_b_2.c | 17 +- 25 files changed, 338 insertions(+), 326 deletions(-) create mode 100644 gcc/testsuite/gcc.target/aarch64/eh_return-2.c create mode 100644 gcc/testsuite/gcc.target/aarch64/eh_return-3.c -- 2.25.1
