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| author | Jose E. Marchesi <jose.marchesi@oracle.com> | 2022-07-08 18:32:02 +0200 |
|---|---|---|
| committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2022-08-01 19:44:12 +0200 |
| commit | 32566720f3a9135fa355f0304f024a79f107a1b8 (patch) | |
| tree | 1f2f05a42c22bedf6b9f0e440dc79edb37b07b41 /gcc/dwarf2ctf.cc | |
| parent | b64e937ccde286278743e8fdffea494faa46c214 (diff) | |
| download | gcc-32566720f3a9135fa355f0304f024a79f107a1b8.zip gcc-32566720f3a9135fa355f0304f024a79f107a1b8.tar.gz gcc-32566720f3a9135fa355f0304f024a79f107a1b8.tar.bz2 | |
btf: emit linkage information in BTF_KIND_FUNC entries
The kernel bpftool expects BTF_KIND_FUNC entries in BTF to include an
annotation reflecting the linkage of functions (static, global). For
whatever reason they abuse the `vlen' field of the BTF_KIND_FUNC entry
instead of adding a variable-part to the record like it is done with
other entry kinds.
This patch makes GCC to include this linkage info in BTF_KIND_FUNC
entries.
Tested in bpf-unknown-none target.
gcc/ChangeLog:
PR debug/106263
* ctfc.h (struct ctf_dtdef): Add field linkage.
* ctfc.cc (ctf_add_function): Set ctti_linkage.
* dwarf2ctf.cc (gen_ctf_function_type): Pass a linkage for
function types and subprograms.
* btfout.cc (btf_asm_func_type): Emit linkage information for the
function.
(btf_dtd_emit_preprocess_cb): Propagate the linkage information
for functions.
gcc/testsuite/ChangeLog:
PR debug/106263
* gcc.dg/debug/btf/btf-function-4.c: New test.
* gcc.dg/debug/btf/btf-function-5.c: Likewise.
Diffstat (limited to 'gcc/dwarf2ctf.cc')
| -rw-r--r-- | gcc/dwarf2ctf.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/dwarf2ctf.cc b/gcc/dwarf2ctf.cc index a6329ab..3971000 100644 --- a/gcc/dwarf2ctf.cc +++ b/gcc/dwarf2ctf.cc @@ -644,6 +644,7 @@ gen_ctf_function_type (ctf_container_ref ctfc, dw_die_ref function, ctf_funcinfo_t func_info; uint32_t num_args = 0; + int linkage = get_AT_flag (function, DW_AT_external); ctf_id_t return_type_id; ctf_id_t function_type_id; @@ -687,7 +688,8 @@ gen_ctf_function_type (ctf_container_ref ctfc, dw_die_ref function, function_name, (const ctf_funcinfo_t *)&func_info, function, - from_global_func); + from_global_func, + linkage); /* Second pass on formals: generate the CTF types corresponding to them and add them as CTF function args. */ |