user: implement mlibc as the libc, finally.

It's finally done.. Signed-off-by: kaguya <vpshinomiya@protonmail.com>
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
@@ -0,0 +1,99 @@
+
+#include <bits/ensure.h>
+#include <dlfcn.h>
+
+#include <mlibc/debug.hpp>
+
+struct __dlapi_symbol {
+	const char *file;
+	void *base;
+	const char *symbol;
+	void *address;
+	const void *elf_symbol;
+	void *link_map;
+};
+
+extern "C" const char *__dlapi_error();
+extern "C" void *__dlapi_open(const char *, int, void *);
+extern "C" void *__dlapi_resolve(void *, const char *, void *, const char *);
+extern "C" int __dlapi_reverse(const void *, __dlapi_symbol *);
+extern "C" int __dlapi_close(void *);
+extern "C" int __dlapi_find_object(void *__address, dl_find_object *__result);
+
+int dlclose(void *handle) {
+	return __dlapi_close(handle);
+}
+
+char *dlerror(void) {
+	return const_cast<char *>(__dlapi_error());
+}
+
+[[gnu::noinline]]
+void *dlopen(const char *file, int flags) {
+	auto ra = __builtin_extract_return_addr(__builtin_return_address(0));
+	return __dlapi_open(file, flags, ra);
+}
+
+[[gnu::noinline]]
+void *dlsym(void *__restrict handle, const char *__restrict string) {
+	auto ra = __builtin_extract_return_addr(__builtin_return_address(0));
+	return __dlapi_resolve(handle, string, ra, nullptr);
+}
+
+[[gnu::noinline]]
+void *dlvsym(void *__restrict handle, const char *__restrict string, const char *__restrict version) {
+	auto ra = __builtin_extract_return_addr(__builtin_return_address(0));
+	return __dlapi_resolve(handle, string, ra, version);
+}
+
+//gnu extensions
+
+#if __MLIBC_GLIBC_OPTION
+
+int dladdr(const void *ptr, Dl_info *out) {
+	__dlapi_symbol info;
+	if(__dlapi_reverse(ptr, &info))
+		return 0;
+
+	out->dli_fname = info.file;
+	out->dli_fbase = info.base;
+	out->dli_sname = info.symbol;
+	out->dli_saddr = info.address;
+	return 1;
+}
+
+int dladdr1(const void *ptr, Dl_info *out, void **extra, int flags) {
+	__dlapi_symbol info;
+	if(__dlapi_reverse(ptr, &info)) {
+		return 0;
+	}
+
+	out->dli_fname = info.file;
+	out->dli_fbase = info.base;
+	out->dli_sname = info.symbol;
+	out->dli_saddr = info.address;
+
+	switch(flags) {
+	case RTLD_DL_SYMENT:
+		*const_cast<const void **>(extra) = info.elf_symbol;
+		break;
+	case RTLD_DL_LINKMAP:
+		*extra = info.link_map;
+		break;
+	default:
+		break;
+	}
+
+	return 1;
+}
+
+int dlinfo(void *__restrict, int, void *__restrict) {
+	__ensure(!"dlinfo() not implemented");
+	__builtin_unreachable();
+}
+
+int _dl_find_object(void *address, struct dl_find_object *result) {
+	return __dlapi_find_object(address, result);
+}
+
+#endif // __MLIBC_GLIBC_OPTION