hrev52227 adds 1 changeset to branch 'master'
old head: deeaee6fc9fac3a29ae35cddfe9ee59a7ad26868
new head: ab39ceb10cd46f91f7c2443e133e2ba7e66121d9
overview:
https://git.haiku-os.org/haiku/log/?qt=range&q=ab39ceb10cd4+%5Edeeaee6fc9fa
----------------------------------------------------------------------------
ab39ceb10cd4: system/glue: Add a crtbegin and crtend implementation.
GCC provides these but Clang does not; these come from the ones Clang
was going to provide, but decided against it in favor of letting libc vendors
distribute them instead, hence the license headers.
For now, they are only enabled when building with Clang, as we still use GCC's
versions otherwise. But I've tested them with apps built with GCC 7 (as Clang
builds are still too broken at present) and they seem to work just fine. (They
will not build with GCC 2 of course, due to how they use __attribute__.)
[ Augustin Cavalier <waddlesplash@xxxxxxxxx> ]
----------------------------------------------------------------------------
Revision: hrev52227
Commit: ab39ceb10cd46f91f7c2443e133e2ba7e66121d9
URL: https://git.haiku-os.org/haiku/commit/?id=ab39ceb10cd4
Author: Augustin Cavalier <waddlesplash@xxxxxxxxx>
Date: Tue Aug 14 20:03:29 2018 UTC
----------------------------------------------------------------------------
3 files changed, 119 insertions(+)
src/system/glue/Jamfile | 6 +++
src/system/glue/crtbegin.c | 91 ++++++++++++++++++++++++++++++++++++++++++
src/system/glue/crtend.c | 22 ++++++++++
----------------------------------------------------------------------------
diff --git a/src/system/glue/Jamfile b/src/system/glue/Jamfile
index e04e051723..f82649ddbf 100644
--- a/src/system/glue/Jamfile
+++ b/src/system/glue/Jamfile
@@ -14,6 +14,12 @@ for architectureObject in [ MultiArchSubDirSetup ] {
;
MergeObject <$(architecture)>glue_common.o : $(sources) ;
+ if $(HAIKU_CC_IS_CLANG_$(architecture)) = 1 {
+ MergeObject <$(architecture)>crtbeginS.o : crtbegin.c ;
+ MergeObject <$(architecture)>crtendS.o : crtend.c ;
+ ObjectCcFlags crtbegin.c crtend.c :
-DCRT_HAS_INITFINI_ARRAY -DCRT_SHARED ;
+ }
+
if $(HAIKU_BUILD_TYPE) = bootstrap {
# build a version for stage0 of the bootstrap process
BootstrapStage0PlatformObjects [ FGristFiles $(sources)
] : true ;
diff --git a/src/system/glue/crtbegin.c b/src/system/glue/crtbegin.c
new file mode 100644
index 0000000000..5d6fe078e3
--- /dev/null
+++ b/src/system/glue/crtbegin.c
@@ -0,0 +1,91 @@
+/* ===-- crtbegin.c - Provide __dso_handle ---------------------------------===
+ *
+ * The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+__attribute__((visibility("hidden")))
+#ifdef CRT_SHARED
+ void *__dso_handle = &__dso_handle;
+#else
+ void *__dso_handle = (void *)0;
+#endif
+
+static const long __EH_FRAME_LIST__[]
+ __attribute__((section(".eh_frame"), aligned(4), visibility("hidden"))) = {};
+
+struct object {
+ void *p[8];
+};
+
+extern void __register_frame_info(const void *, void *)
+ __attribute__((weak));
+
+extern void *__deregister_frame_info(const void *) __attribute__((weak));
+extern void *__deregister_frame_info_bases(const void *) __attribute__((weak));
+
+#ifndef CRT_HAS_INITFINI_ARRAY
+typedef void (*fp)(void);
+static const fp __CTOR_LIST__[]
+ __attribute__((section(".ctors"), aligned(sizeof(fp)), visibility("hidden"),
used)) = { (fp)-1 };
+extern const fp __CTOR_END__[] __attribute__((visibility("hidden")));
+#endif
+
+#ifdef CRT_SHARED
+extern void __cxa_finalize(void *) __attribute__((weak));
+#endif
+
+static void __attribute__((used)) __do_init() {
+ static _Bool __initialized;
+ if (__builtin_expect(__initialized, 0))
+ return;
+ __initialized = 1;
+
+ static struct object ob;
+ if (__register_frame_info)
+ __register_frame_info(__EH_FRAME_LIST__, &ob);
+
+#ifndef CRT_HAS_INITFINI_ARRAY
+ unsigned long n = (unsigned long)__CTOR_LIST__[0];
+ if (n == (unsigned long)-1)
+ for (n = 0; __CTOR_LIST__[n + 1] != 0; n++);
+ for (unsigned long i = n; i >= 1; i--)
+ __CTOR_LIST__[i]();
+#endif
+}
+
+#ifndef CRT_HAS_INITFINI_ARRAY
+static const fp __DTOR_LIST__[]
+ __attribute__((section(".dtors"), aligned(sizeof(fp)), visibility("hidden"),
used)) = { (fp)-1 };
+extern const fp __DTOR_END__[] __attribute__((visibility("hidden")));
+#endif
+
+__attribute__((section(".init_array"), used))
+ static void (*__init)(void) = __do_init;
+
+static void __attribute__((used)) __do_fini() {
+ static _Bool __finalized;
+ if (__builtin_expect(__finalized, 0))
+ return;
+ __finalized = 1;
+
+#ifdef CRT_SHARED
+ if (__cxa_finalize)
+ __cxa_finalize(__dso_handle);
+#endif
+
+ if (__deregister_frame_info)
+ __deregister_frame_info(__EH_FRAME_LIST__);
+
+#ifndef CRT_HAS_INITFINI_ARRAY
+ for (unsigned long i = 1; __DTOR_LIST__[i]; i++)
+ __DTOR_LIST__[i]();
+#endif
+}
+
+__attribute__((section(".fini_array"), used))
+ static void (*__fini)(void) = __do_fini;
diff --git a/src/system/glue/crtend.c b/src/system/glue/crtend.c
new file mode 100644
index 0000000000..41c053bf68
--- /dev/null
+++ b/src/system/glue/crtend.c
@@ -0,0 +1,22 @@
+/* ===-- crtend.c - Provide .eh_frame --------------------------------------===
+ *
+ * The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include <inttypes.h>
+
+const int32_t __EH_FRAME_END__[]
+ __attribute__((section(".eh_frame"), used)) = { 0 };
+
+#ifndef CRT_HAS_INITFINI_ARRAY
+typedef void (*fp)(void);
+const fp __CTOR_END__[]
+ __attribute__((section(".ctors"), visibility("hidden"), used)) = { 0 };
+const fp __DTOR_END__[]
+ __attribute__((section(".dtors"), visibility("hidden"), used)) = { 0 };
+#endif
