1. Patch1 is dependent patch to fix zext extension error in 32-bit ARM.
2. Patch2 supports bpf fkunc in 32-bit ARM for EABI.
3. Patch3 is used to add test cases to cover some parameter scenarios
states by AAPCS.
4. Patch4 fix a comment error.
The following is the test_progs result in the 32-bit ARM environment:
# uname -m
armv7l
# echo 1 > /proc/sys/net/core/bpf_jit_enable
# ./test_progs -t kfunc_call
#1/1 kfunc_call/kfunc_syscall_test_fail:OK
#1/2 kfunc_call/kfunc_syscall_test_null_fail:OK
#1/3 kfunc_call/kfunc_call_test_get_mem_fail_rdonly:OK
#1/4 kfunc_call/kfunc_call_test_get_mem_fail_use_after_free:OK
#1/5 kfunc_call/kfunc_call_test_get_mem_fail_oob:OK
#1/6 kfunc_call/kfunc_call_test_get_mem_fail_not_const:OK
#1/7 kfunc_call/kfunc_call_test_mem_acquire_fail:OK
#1/8 kfunc_call/kfunc_call_test1:OK
#1/9 kfunc_call/kfunc_call_test2:OK
#1/10 kfunc_call/kfunc_call_test4:OK
#1/11 kfunc_call/kfunc_call_test5:OK
#1/12 kfunc_call/kfunc_call_test6:OK
#1/13 kfunc_call/kfunc_call_test_ref_btf_id:OK
#1/14 kfunc_call/kfunc_call_test_get_mem:OK
#1/15 kfunc_call/kfunc_syscall_test:OK
#1/16 kfunc_call/kfunc_syscall_test_null:OK
#1/19 kfunc_call/destructive:OK
---
Changes since v2:
- Remove patches to adjust sk size check for CO_RE in 32-bit arch.
- Add check of kfunc's return value in insn_def_regno.
- Adjust is_reg64 for insn_def_regno.
- The check of CONFIG_AEABI is moved from emit_kfunc_call to
bpf_jit_supports_kfunc_call.
- Fix a comment error in fixup_kfunc_call.
Yang Jihong (4):
bpf: Adapt 32-bit return value kfunc for 32-bit ARM when zext
extension
bpf: Add kernel function call support in 32-bit ARM for EABI
bpf:selftests: Add kfunc_call test for mixing 32-bit and 64-bit
parameters
bpf: Fix comment error in fixup_kfunc_call function
arch/arm/net/bpf_jit_32.c | 137 ++++++++++++++++++
kernel/bpf/verifier.c | 46 +++++-
net/bpf/test_run.c | 18 +++
.../selftests/bpf/prog_tests/kfunc_call.c | 3 +
.../selftests/bpf/progs/kfunc_call_test.c | 52 +++++++
5 files changed, 252 insertions(+), 4 deletions(-)
--
2.30.GIT
