[libc-commits] [libc] [libc] Add `dlfcn.h` placeholder (PR #97501)
Izaak Schroeder via libc-commits
libc-commits at lists.llvm.org
Fri Jul 5 22:06:46 PDT 2024
https://github.com/izaakschroeder updated https://github.com/llvm/llvm-project/pull/97501
>From e094dfb2bba3a6d4ca8db92ed25b953dbe0eb2e9 Mon Sep 17 00:00:00 2001
From: Izaak Schroeder <izaak.schroeder at gmail.com>
Date: Mon, 1 Jul 2024 16:23:01 -0700
Subject: [PATCH] [libc] Add `dlfcn.h` placeholder
---
libc/config/linux/aarch64/entrypoints.txt | 6 ++++
libc/config/linux/x86_64/entrypoints.txt | 6 ++++
libc/spec/posix.td | 35 ++++++++++++++++++
libc/src/CMakeLists.txt | 1 +
libc/src/dlfcn/CMakeLists.txt | 43 +++++++++++++++++++++++
libc/src/dlfcn/dlclose.cpp | 17 +++++++++
libc/src/dlfcn/dlclose.h | 18 ++++++++++
libc/src/dlfcn/dlerror.cpp | 19 ++++++++++
libc/src/dlfcn/dlerror.h | 18 ++++++++++
libc/src/dlfcn/dlopen.cpp | 17 +++++++++
libc/src/dlfcn/dlopen.h | 18 ++++++++++
libc/src/dlfcn/dlsym.cpp | 17 +++++++++
libc/src/dlfcn/dlsym.h | 18 ++++++++++
13 files changed, 233 insertions(+)
create mode 100644 libc/src/dlfcn/CMakeLists.txt
create mode 100644 libc/src/dlfcn/dlclose.cpp
create mode 100644 libc/src/dlfcn/dlclose.h
create mode 100644 libc/src/dlfcn/dlerror.cpp
create mode 100644 libc/src/dlfcn/dlerror.h
create mode 100644 libc/src/dlfcn/dlopen.cpp
create mode 100644 libc/src/dlfcn/dlopen.h
create mode 100644 libc/src/dlfcn/dlsym.cpp
create mode 100644 libc/src/dlfcn/dlsym.h
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index f7e08ec151d07..c7413eb1a468e 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -17,6 +17,12 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.ctype.tolower
libc.src.ctype.toupper
+ # dlfcn.h entrypoints
+ libc.src.dlfcn.dlopen
+ libc.src.dlfcn.dlsym
+ libc.src.dlfcn.dlclose
+ libc.src.dlfcn.dlerror
+
# errno.h entrypoints
libc.src.errno.errno
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 09f04fb31dfd8..ba60475809853 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -17,6 +17,12 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.ctype.tolower
libc.src.ctype.toupper
+ # dlfcn.h entrypoints
+ libc.src.dlfcn.dlopen
+ libc.src.dlfcn.dlsym
+ libc.src.dlfcn.dlclose
+ libc.src.dlfcn.dlerror
+
# errno.h entrypoints
libc.src.errno.errno
diff --git a/libc/spec/posix.td b/libc/spec/posix.td
index d14047548e104..1878b1ee2ae41 100644
--- a/libc/spec/posix.td
+++ b/libc/spec/posix.td
@@ -222,6 +222,40 @@ def POSIX : StandardSpec<"POSIX"> {
[] // Functions
>;
+ HeaderSpec DlFcn = HeaderSpec<
+ "dlfcn.h",
+ [
+ Macro<"RTLD_LAZY">,
+ Macro<"RTLD_NOW">,
+ Macro<"RTLD_GLOBAL">,
+ Macro<"RTLD_LOCAL">,
+ ],
+ [], // Types
+ [], // Enumerations
+ [
+ FunctionSpec<
+ "dlclose",
+ RetValSpec<IntType>,
+ [ArgSpec<VoidPtr>]
+ >,
+ FunctionSpec<
+ "dlerror",
+ RetValSpec<CharPtr>,
+ []
+ >,
+ FunctionSpec<
+ "dlopen",
+ RetValSpec<VoidPtr>,
+ [ArgSpec<ConstCharPtr>, ArgSpec<IntType>]
+ >,
+ FunctionSpec<
+ "dlsym",
+ RetValSpec<VoidPtr>,
+ [ArgSpec<VoidRestrictedPtr>, ArgSpec<ConstCharRestrictedPtr>]
+ >,
+ ]
+ >;
+
HeaderSpec FCntl = HeaderSpec<
"fcntl.h",
[], // Macros
@@ -1690,6 +1724,7 @@ def POSIX : StandardSpec<"POSIX"> {
ArpaInet,
CType,
Dirent,
+ DlFcn,
Errno,
FCntl,
PThread,
diff --git a/libc/src/CMakeLists.txt b/libc/src/CMakeLists.txt
index 09b16be1e2d42..f011fe25226e5 100644
--- a/libc/src/CMakeLists.txt
+++ b/libc/src/CMakeLists.txt
@@ -11,6 +11,7 @@ add_subdirectory(stdio)
add_subdirectory(stdlib)
add_subdirectory(string)
add_subdirectory(wchar)
+add_subdirectory(dlfcn)
if(${LIBC_TARGET_OS} STREQUAL "linux")
add_subdirectory(dirent)
diff --git a/libc/src/dlfcn/CMakeLists.txt b/libc/src/dlfcn/CMakeLists.txt
new file mode 100644
index 0000000000000..5534f2dfb8853
--- /dev/null
+++ b/libc/src/dlfcn/CMakeLists.txt
@@ -0,0 +1,43 @@
+add_entrypoint_object(
+ dlclose
+ SRCS
+ dlclose.cpp
+ HDRS
+ dlclose.h
+ DEPENDS
+ libc.include.dlfcn
+ libc.src.errno.errno
+)
+
+add_entrypoint_object(
+ dlerror
+ SRCS
+ dlerror.cpp
+ HDRS
+ dlerror.h
+ DEPENDS
+ libc.include.dlfcn
+ libc.src.errno.errno
+)
+
+add_entrypoint_object(
+ dlopen
+ SRCS
+ dlopen.cpp
+ HDRS
+ dlopen.h
+ DEPENDS
+ libc.include.dlfcn
+ libc.src.errno.errno
+)
+
+add_entrypoint_object(
+ dlsym
+ SRCS
+ dlsym.cpp
+ HDRS
+ dlsym.h
+ DEPENDS
+ libc.include.dlfcn
+ libc.src.errno.errno
+)
diff --git a/libc/src/dlfcn/dlclose.cpp b/libc/src/dlfcn/dlclose.cpp
new file mode 100644
index 0000000000000..6dc1892120ddd
--- /dev/null
+++ b/libc/src/dlfcn/dlclose.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of dlclose -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "dlclose.h"
+
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, dlclose, (void *)) { return -1; }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/dlfcn/dlclose.h b/libc/src/dlfcn/dlclose.h
new file mode 100644
index 0000000000000..27c0207d726e4
--- /dev/null
+++ b/libc/src/dlfcn/dlclose.h
@@ -0,0 +1,18 @@
+//===-- Implementation header of dlclose ------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_DLFCN_DLCLOSE_H
+#define LLVM_LIBC_SRC_DLFCN_DLCLOSE_H
+
+namespace LIBC_NAMESPACE {
+
+int dlclose(void *);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_DLFCN_DLCLOSE_H
diff --git a/libc/src/dlfcn/dlerror.cpp b/libc/src/dlfcn/dlerror.cpp
new file mode 100644
index 0000000000000..8c3611d9c639e
--- /dev/null
+++ b/libc/src/dlfcn/dlerror.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of delerror ----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "dlerror.h"
+
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(char *, dlerror, ()) {
+ return const_cast<char *>("unsupported");
+}
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/dlfcn/dlerror.h b/libc/src/dlfcn/dlerror.h
new file mode 100644
index 0000000000000..966496016d3eb
--- /dev/null
+++ b/libc/src/dlfcn/dlerror.h
@@ -0,0 +1,18 @@
+//===-- Implementation header of dlerror ------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_DLFCN_DLERROR_H
+#define LLVM_LIBC_SRC_DLFCN_DLERROR_H
+
+namespace LIBC_NAMESPACE {
+
+char *dlerror();
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_DLFCN_DLERROR_H
diff --git a/libc/src/dlfcn/dlopen.cpp b/libc/src/dlfcn/dlopen.cpp
new file mode 100644
index 0000000000000..835d981e19237
--- /dev/null
+++ b/libc/src/dlfcn/dlopen.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of dlopen -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "dlopen.h"
+
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(void *, dlopen, (const char *, int)) { return nullptr; }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/dlfcn/dlopen.h b/libc/src/dlfcn/dlopen.h
new file mode 100644
index 0000000000000..4565953efd494
--- /dev/null
+++ b/libc/src/dlfcn/dlopen.h
@@ -0,0 +1,18 @@
+//===-- Implementation header of dlopen -------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_DLFCN_DLOPEN_H
+#define LLVM_LIBC_SRC_DLFCN_DLOPEN_H
+
+namespace LIBC_NAMESPACE {
+
+void *dlopen(const char *, int);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_DLFCN_DLOPEN_H
diff --git a/libc/src/dlfcn/dlsym.cpp b/libc/src/dlfcn/dlsym.cpp
new file mode 100644
index 0000000000000..98d678caece90
--- /dev/null
+++ b/libc/src/dlfcn/dlsym.cpp
@@ -0,0 +1,17 @@
+//===-- Implementation of dlsym ------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "dlsym.h"
+
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(void *, dlsym, (void *, const char *)) { return nullptr; }
+
+} // namespace LIBC_NAMESPACE
diff --git a/libc/src/dlfcn/dlsym.h b/libc/src/dlfcn/dlsym.h
new file mode 100644
index 0000000000000..8157ac3e3fd4c
--- /dev/null
+++ b/libc/src/dlfcn/dlsym.h
@@ -0,0 +1,18 @@
+//===-- Implementation header of dlsym --------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_DLFCN_DLSYM_H
+#define LLVM_LIBC_SRC_DLFCN_DLSYM_H
+
+namespace LIBC_NAMESPACE {
+
+void *dlsym(void *, const char *);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_DLFCN_DLSYM_H
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