modules: generate modinfo.c

Add script to generate C source with a small
database containing the module meta-data.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jose R. Ziviani <jziviani@suse.de>
Message-Id: <20210624103836.2382472-4-kraxel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gerd Hoffmann 2021-06-24 12:38:05 +02:00 committed by Paolo Bonzini
parent f5723ab665
commit 5ebbfecc3e
5 changed files with 128 additions and 1 deletions

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@ -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

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@ -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',

84
scripts/modinfo-generate.py Executable file
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@ -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:])

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@ -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 */

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@ -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;