diff options
| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2024-11-14 16:15:13 +0000 |
|---|---|---|
| committer | Richard Sandiford <richard.sandiford@arm.com> | 2024-11-14 16:15:13 +0000 |
| commit | 80fabc8d6ba8968abc36305c49564fe1ab1a120f (patch) | |
| tree | ef7140b2df16919d85a6f253218952127191f499 /gcc/fortran/trans-expr.cc | |
| parent | 6f73c29d2fc27708476377749f7823bb86004bad (diff) | |
| download | gcc-80fabc8d6ba8968abc36305c49564fe1ab1a120f.zip gcc-80fabc8d6ba8968abc36305c49564fe1ab1a120f.tar.gz gcc-80fabc8d6ba8968abc36305c49564fe1ab1a120f.tar.bz2 | |
aarch64: Introduce indirect_return attribute
Tail calls of indirect_return functions from non-indirect_return
functions are disallowed even if BTI is disabled, since the call
site may have BTI enabled.
Needed for swapcontext within the same function when GCS is enabled.
gcc/ChangeLog:
* config/aarch64/aarch64.cc (aarch64_gnu_attributes): Add
indirect_return.
(aarch64_gen_callee_cookie): Use indirect_return attribute.
(aarch64_callee_indirect_return): New.
(aarch_fun_is_indirect_return): New.
(aarch64_function_ok_for_sibcall): Disallow tail calls if caller
is non-indirect_return but callee is indirect_return.
(aarch64_function_arg): Add indirect_return to cookie.
(aarch64_init_cumulative_args): Record indirect_return in
CUMULATIVE_ARGS.
(aarch64_comp_type_attributes): Check indirect_return attribute.
(aarch64_output_mi_thunk): Add indirect_return to cookie.
* config/aarch64/aarch64.h (CUMULATIVE_ARGS): Add new field
indirect_return.
* config/aarch64/aarch64.md (tlsdesc_small_<mode>): Update.
* config/aarch64/aarch64-opts.h (AARCH64_NUM_ABI_ATTRIBUTES): New.
* config/aarch64/aarch64-protos.h (aarch64_gen_callee_cookie): Update.
* config/arm/aarch-bti-insert.cc (call_needs_bti_j): New.
(rest_of_insert_bti): Use call_needs_bti_j.
* config/arm/aarch-common-protos.h
(aarch_fun_is_indirect_return): New.
* config/arm/arm.cc
(aarch_fun_is_indirect_return): New.
Co-authored-by: Yury Khrustalev <yury.khrustalev@arm.com>
Diffstat (limited to 'gcc/fortran/trans-expr.cc')
0 files changed, 0 insertions, 0 deletions