Structure objtool_file can be used by different subcommands. In fact it already is, by check and orc.
Provide a function that allows to initialize objtool_file, that builtin can call, without relying on check to do the correct setup for them and explicitly hand the objtool_file to them. Reviewed-by: Miroslav Benes <mbe...@suse.cz> Signed-off-by: Julien Thierry <jthie...@redhat.com> --- tools/objtool/builtin-check.c | 7 ++++++- tools/objtool/builtin-orc.c | 8 ++++++- tools/objtool/check.c | 39 +++++++++++------------------------ tools/objtool/objtool.c | 29 ++++++++++++++++++++++++++ tools/objtool/objtool.h | 4 +++- tools/objtool/weak.c | 4 +--- 6 files changed, 58 insertions(+), 33 deletions(-) diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c index 7a44174967b5..0126ec3bb6c9 100644 --- a/tools/objtool/builtin-check.c +++ b/tools/objtool/builtin-check.c @@ -41,6 +41,7 @@ const struct option check_options[] = { int cmd_check(int argc, const char **argv) { const char *objname, *s; + struct objtool_file *file; argc = parse_options(argc, argv, check_options, check_usage, 0); @@ -53,5 +54,9 @@ int cmd_check(int argc, const char **argv) if (s && !s[9]) vmlinux = true; - return check(objname, false); + file = objtool_open_read(objname); + if (!file) + return 1; + + return check(file, false); } diff --git a/tools/objtool/builtin-orc.c b/tools/objtool/builtin-orc.c index b1dfe2007962..3979f275a775 100644 --- a/tools/objtool/builtin-orc.c +++ b/tools/objtool/builtin-orc.c @@ -31,13 +31,19 @@ int cmd_orc(int argc, const char **argv) usage_with_options(orc_usage, check_options); if (!strncmp(argv[0], "gen", 3)) { + struct objtool_file *file; + argc = parse_options(argc, argv, check_options, orc_usage, 0); if (argc != 1) usage_with_options(orc_usage, check_options); objname = argv[0]; - return check(objname, true); + file = objtool_open_read(objname); + if (!file) + return 1; + + return check(file, true); } if (!strcmp(argv[0], "dump")) { diff --git a/tools/objtool/check.c b/tools/objtool/check.c index e034a8f24f46..ef8e9300e1a3 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -27,7 +27,6 @@ struct alternative { bool skip_orig; }; -const char *objname; struct cfi_init_state initial_func_cfi; struct instruction *find_insn(struct objtool_file *file, @@ -2777,36 +2776,22 @@ static int validate_reachable_instructions(struct objtool_file *file) return 0; } -static struct objtool_file file; - -int check(const char *_objname, bool orc) +int check(struct objtool_file *file, bool orc) { int ret, warnings = 0; - objname = _objname; - - file.elf = elf_open_read(objname, O_RDWR); - if (!file.elf) - return 1; - - INIT_LIST_HEAD(&file.insn_list); - hash_init(file.insn_hash); - file.c_file = !vmlinux && find_section_by_name(file.elf, ".comment"); - file.ignore_unreachables = no_unreachable; - file.hints = false; - arch_initial_func_cfi_state(&initial_func_cfi); - ret = decode_sections(&file); + ret = decode_sections(file); if (ret < 0) goto out; warnings += ret; - if (list_empty(&file.insn_list)) + if (list_empty(&file->insn_list)) goto out; if (vmlinux && !validate_dup) { - ret = validate_vmlinux_functions(&file); + ret = validate_vmlinux_functions(file); if (ret < 0) goto out; @@ -2815,41 +2800,41 @@ int check(const char *_objname, bool orc) } if (retpoline) { - ret = validate_retpoline(&file); + ret = validate_retpoline(file); if (ret < 0) return ret; warnings += ret; } - ret = validate_functions(&file); + ret = validate_functions(file); if (ret < 0) goto out; warnings += ret; - ret = validate_unwind_hints(&file, NULL); + ret = validate_unwind_hints(file, NULL); if (ret < 0) goto out; warnings += ret; if (!warnings) { - ret = validate_reachable_instructions(&file); + ret = validate_reachable_instructions(file); if (ret < 0) goto out; warnings += ret; } if (orc) { - ret = create_orc(&file); + ret = create_orc(file); if (ret < 0) goto out; - ret = create_orc_sections(&file); + ret = create_orc_sections(file); if (ret < 0) goto out; } - if (file.elf->changed) { - ret = elf_write(file.elf); + if (file->elf->changed) { + ret = elf_write(file->elf); if (ret < 0) goto out; } diff --git a/tools/objtool/objtool.c b/tools/objtool/objtool.c index 58fdda510653..84e89e79be9b 100644 --- a/tools/objtool/objtool.c +++ b/tools/objtool/objtool.c @@ -22,6 +22,8 @@ #include <linux/kernel.h> #include "builtin.h" +#include "objtool.h" +#include "warn.h" struct cmd_struct { const char *name; @@ -39,6 +41,33 @@ static struct cmd_struct objtool_cmds[] = { bool help; +const char *objname; +static struct objtool_file file; + +struct objtool_file *objtool_open_read(const char *_objname) +{ + if (objname) { + if (strcmp(objname, _objname)) { + WARN("won't handle more than one file at a time"); + return NULL; + } + return &file; + } + objname = _objname; + + file.elf = elf_open_read(objname, O_RDWR); + if (!file.elf) + return NULL; + + INIT_LIST_HEAD(&file.insn_list); + hash_init(file.insn_hash); + file.c_file = !vmlinux && find_section_by_name(file.elf, ".comment"); + file.ignore_unreachables = no_unreachable; + file.hints = false; + + return &file; +} + static void cmd_usage(void) { unsigned int i, longest = 0; diff --git a/tools/objtool/objtool.h b/tools/objtool/objtool.h index 528028a66816..42b27c4ed683 100644 --- a/tools/objtool/objtool.h +++ b/tools/objtool/objtool.h @@ -19,7 +19,9 @@ struct objtool_file { bool ignore_unreachables, c_file, hints, rodata; }; -int check(const char *objname, bool orc); +struct objtool_file *objtool_open_read(const char *_objname); + +int check(struct objtool_file *file, bool orc); int orc_dump(const char *objname); int create_orc(struct objtool_file *file); int create_orc_sections(struct objtool_file *file); diff --git a/tools/objtool/weak.c b/tools/objtool/weak.c index 942ea5e8ac36..82698319f008 100644 --- a/tools/objtool/weak.c +++ b/tools/objtool/weak.c @@ -17,9 +17,7 @@ return ENOSYS; \ }) -const char __weak *objname; - -int __weak check(const char *_objname, bool orc) +int __weak check(struct objtool_file *file, bool orc) { UNSUPPORTED("check subcommand"); } -- 2.21.3