From 5ebbfecc3e6fa443a506ec5fe65f0ca98973d404 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Thu, 24 Jun 2021 12:38:05 +0200 Subject: [PATCH] modules: generate modinfo.c Add script to generate C source with a small database containing the module meta-data. Signed-off-by: Gerd Hoffmann Reviewed-by: Jose R. Ziviani Message-Id: <20210624103836.2382472-4-kraxel@redhat.com> Signed-off-by: Paolo Bonzini --- include/qemu/module.h | 17 ++++++++ meson.build | 13 +++++- scripts/modinfo-generate.py | 84 +++++++++++++++++++++++++++++++++++++ softmmu/vl.c | 4 ++ util/module.c | 11 +++++ 5 files changed, 128 insertions(+), 1 deletion(-) create mode 100755 scripts/modinfo-generate.py diff --git a/include/qemu/module.h b/include/qemu/module.h index b595f15975..9cd305de59 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -134,4 +134,21 @@ void module_load_qom_all(void); */ #define module_opts(name) modinfo(opts, name) +/* + * module info database + * + * scripts/modinfo-generate.c will build this using the data collected + * by scripts/modinfo-collect.py + */ +typedef struct QemuModinfo QemuModinfo; +struct QemuModinfo { + const char *name; + const char *arch; + const char **objs; + const char **deps; + const char **opts; +}; +extern const QemuModinfo qemu_modinfo[]; +void module_init_info(const QemuModinfo *info); + #endif diff --git a/meson.build b/meson.build index ff580f1f80..7b827f7caa 100644 --- a/meson.build +++ b/meson.build @@ -2242,6 +2242,7 @@ subdir('tests/qtest/fuzz') ######################## modinfo_collect = find_program('scripts/modinfo-collect.py') +modinfo_generate = find_program('scripts/modinfo-generate.py') modinfo_files = [] block_mods = [] @@ -2267,7 +2268,6 @@ foreach d, list : modules output: d + '-' + m + '.modinfo', input: module_ss.sources(), capture: true, - build_by_default: true, # to be removed when added to a target command: [modinfo_collect, '@INPUT@']) endif else @@ -2280,6 +2280,17 @@ foreach d, list : modules endforeach endforeach +if enable_modules + modinfo_src = custom_target('modinfo.c', + output: 'modinfo.c', + input: modinfo_files, + command: [modinfo_generate, '@INPUT@'], + capture: true) + modinfo_lib = static_library('modinfo', modinfo_src) + modinfo_dep = declare_dependency(link_whole: modinfo_lib) + softmmu_ss.add(modinfo_dep) +endif + nm = find_program('nm') undefsym = find_program('scripts/undefsym.py') block_syms = custom_target('block.syms', output: 'block.syms', diff --git a/scripts/modinfo-generate.py b/scripts/modinfo-generate.py new file mode 100755 index 0000000000..a6d98a6bc4 --- /dev/null +++ b/scripts/modinfo-generate.py @@ -0,0 +1,84 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- + +import os +import sys + +def print_array(name, values): + if len(values) == 0: + return + list = ", ".join(values) + print(" .%s = ((const char*[]){ %s, NULL })," % (name, list)) + +def parse_line(line): + kind = "" + data = "" + get_kind = False + get_data = False + for item in line.split(): + if item == "MODINFO_START": + get_kind = True + continue + if item.startswith("MODINFO_END"): + get_data = False + continue + if get_kind: + kind = item + get_kind = False + get_data = True + continue + if get_data: + data += " " + item + continue + return (kind, data) + +def generate(name, lines): + arch = "" + objs = [] + deps = [] + opts = [] + for line in lines: + if line.find("MODINFO_START") != -1: + (kind, data) = parse_line(line) + if kind == 'obj': + objs.append(data) + elif kind == 'dep': + deps.append(data) + elif kind == 'opts': + opts.append(data) + elif kind == 'arch': + arch = data; + else: + print("unknown:", kind) + exit(1) + + print(" .name = \"%s\"," % name) + if arch != "": + print(" .arch = %s," % arch) + print_array("objs", objs) + print_array("deps", deps) + print_array("opts", opts) + print("},{"); + +def print_pre(): + print("/* generated by scripts/modinfo-generate.py */") + print("#include \"qemu/osdep.h\"") + print("#include \"qemu/module.h\"") + print("const QemuModinfo qemu_modinfo[] = {{") + +def print_post(): + print(" /* end of list */") + print("}};") + +def main(args): + print_pre() + for modinfo in args: + with open(modinfo) as f: + lines = f.readlines() + print(" /* %s */" % modinfo) + (basename, ext) = os.path.splitext(modinfo) + generate(basename, lines) + print_post() + +if __name__ == "__main__": + main(sys.argv[1:]) diff --git a/softmmu/vl.c b/softmmu/vl.c index a50c8575a1..7cef3423a7 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2755,6 +2755,10 @@ void qemu_init(int argc, char **argv, char **envp) error_init(argv[0]); qemu_init_exec_dir(argv[0]); +#ifdef CONFIG_MODULES + module_init_info(qemu_modinfo); +#endif + qemu_init_subsystems(); /* first pass of option parsing */ diff --git a/util/module.c b/util/module.c index eee8ff2de1..8d3e8275b9 100644 --- a/util/module.c +++ b/util/module.c @@ -110,6 +110,17 @@ void module_call_init(module_init_type type) } #ifdef CONFIG_MODULES + +static const QemuModinfo module_info_stub[] = { { + /* end of list */ +} }; +static const QemuModinfo *module_info = module_info_stub; + +void module_init_info(const QemuModinfo *info) +{ + module_info = info; +} + static int module_load_file(const char *fname, bool mayfail, bool export_symbols) { GModule *g_module;