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2f6ecaed66
objdump and readelf have one major CTF-related behavioural difference: objdump can read .ctf sections that contain CTF archives and extract and dump their members, while readelf cannot. Since the linker often emits CTF archives, this means that readelf intermittently and (from the user's perspective) randomly fails to read CTF in files that ld emits, with a confusing error message wrongly claiming that the CTF content is corrupt. This is purely because the archive-opening code in libctf was needlessly tangled up with the BFD code, so readelf couldn't use it. Here, we disentangle it, moving ctf_new_archive_internal from ctf-open-bfd.c into ctf-archive.c and merging it with the helper function in ctf-archive.c it was already using. We add a new public API function ctf_arc_bufopen, that looks very like ctf_bufopen but returns an archive given suitable section data rather than a ctf_file_t: the archive is a ctf_archive_t, so it can be called on raw CTF dictionaries (with no archive present) and will return a single-member synthetic "archive". There is a tiny lifetime tweak here: before now, the archive code could assume that the symbol section in the ctf_archive_internal wrapper structure was always owned by BFD if it was present and should always be freed: now, the caller can pass one in via ctf_arc_bufopen, wihch has the usual lifetime rules for such sections (caller frees): so we add an extra field to track whether this is an internal call from ctf-open-bfd, in which case we still free the symbol section. include/ * ctf-api.h (ctf_arc_bufopen): New. libctf/ * ctf-impl.h (ctf_new_archive_internal): Declare. (ctf_arc_bufopen): Remove. (ctf_archive_internal) <ctfi_free_symsect>: New. * ctf-archive.c (ctf_arc_close): Use it. (ctf_arc_bufopen): Fuse into... (ctf_new_archive_internal): ... this, moved across from... * ctf-open-bfd.c: ... here. (ctf_bfdopen_ctfsect): Use ctf_arc_bufopen. * libctf.ver: Add it. binutils/ * readelf.c (dump_section_as_ctf): Support .ctf archives using ctf_arc_bufopen. Automatically load the .ctf member of such archives as the parent of all other members, unless specifically overridden via --ctf-parent. Split out dumping code into... (dump_ctf_archive_member): ... here, as in objdump, and call it once per archive member. (dump_ctf_indent_lines): Code style fix.
163 lines
2.8 KiB
Plaintext
163 lines
2.8 KiB
Plaintext
/* Copyright (C) 2019-2020 Free Software Foundation, Inc.
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This file is part of libctf.
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libctf is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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LIBCTF_1.0 {
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global:
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/* In libctf and libctf-nobfd. */
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ctf_bufopen;
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ctf_simple_open;
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ctf_create;
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ctf_close;
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ctf_file_close;
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ctf_cuname;
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ctf_cuname_set;
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ctf_parent_file;
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ctf_parent_name;
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ctf_parent_name_set;
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ctf_type_isparent;
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ctf_type_ischild;
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ctf_import;
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ctf_setmodel;
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ctf_getmodel;
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ctf_setspecific;
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ctf_getspecific;
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ctf_errno;
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ctf_errmsg;
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ctf_version;
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ctf_func_info;
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ctf_func_args;
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ctf_func_type_info;
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ctf_func_type_args;
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ctf_lookup_by_name;
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ctf_lookup_by_symbol;
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ctf_lookup_variable;
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ctf_type_resolve;
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ctf_type_lname;
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ctf_type_name;
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ctf_type_aname;
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ctf_type_aname_raw;
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ctf_type_size;
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ctf_type_align;
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ctf_type_kind;
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ctf_type_reference;
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ctf_type_pointer;
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ctf_type_encoding;
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ctf_type_visit;
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ctf_type_cmp;
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ctf_type_compat;
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ctf_member_info;
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ctf_array_info;
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ctf_enum_name;
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ctf_enum_value;
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ctf_label_set;
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ctf_label_get;
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ctf_label_topmost;
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ctf_label_info;
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ctf_member_iter;
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ctf_enum_iter;
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ctf_type_iter;
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ctf_type_iter_all;
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ctf_label_iter;
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ctf_variable_iter;
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ctf_add_array;
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ctf_add_const;
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ctf_add_enum;
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ctf_add_enum_encoded;
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ctf_add_float;
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ctf_add_forward;
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ctf_add_function;
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ctf_add_integer;
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ctf_add_pointer;
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ctf_add_type;
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ctf_add_typedef;
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ctf_add_restrict;
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ctf_add_slice;
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ctf_add_struct;
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ctf_add_union;
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ctf_add_struct_sized;
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ctf_add_union_sized;
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ctf_add_volatile;
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ctf_add_enumerator;
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ctf_add_member;
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ctf_add_member_offset;
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ctf_add_member_encoded;
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ctf_add_variable;
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ctf_set_array;
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ctf_update;
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ctf_discard;
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ctf_snapshot;
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ctf_rollback;
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ctf_write;
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ctf_write_mem;
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ctf_gzwrite;
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ctf_compress_write;
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ctf_getdatasect;
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ctf_arc_write;
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ctf_arc_write_fd;
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ctf_arc_open;
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ctf_arc_bufopen;
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ctf_arc_close;
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ctf_arc_open_by_name;
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ctf_arc_open_by_name_sections;
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ctf_archive_iter;
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ctf_archive_raw_iter;
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ctf_get_arc;
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ctf_dump;
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ctf_setdebug;
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ctf_getdebug;
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/* Not yet part of the stable API. */
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ctf_link_add_ctf;
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ctf_link_add_cu_mapping;
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ctf_link_set_memb_name_changer;
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ctf_link;
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ctf_link_add_strtab;
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ctf_link_shuffle_syms;
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ctf_link_write;
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/* In libctf alone. */
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ctf_fdopen;
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ctf_open;
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ctf_bfdopen;
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ctf_bfdopen_ctfsect;
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local:
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*;
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};
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