[incubator-nuttx] branch master updated: RISC-V: add C++ support to crt0

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new 12476e1f43 RISC-V: add C++ support to crt0
12476e1f43 is described below

commit 12476e1f43040ab864c24251e70aced225ee7d29
Author: Ville Juven <ville.ju...@unikie.com>
AuthorDate: Fri Apr 29 09:45:08 2022 +0300

    RISC-V: add C++ support to crt0
---
 arch/risc-v/src/common/crt0.c | 51 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

diff --git a/arch/risc-v/src/common/crt0.c b/arch/risc-v/src/common/crt0.c
index 0ca5815d68..9edfb5c3c1 100644
--- a/arch/risc-v/src/common/crt0.c
+++ b/arch/risc-v/src/common/crt0.c
@@ -88,6 +88,53 @@ static void sig_trampoline(void)
   );
 }
 
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Linker defined symbols to .ctors and .dtors */
+
+extern void (*_sctors)(void);
+extern void (*_ectors)(void);
+extern void (*_sdtors)(void);
+extern void (*_edtors)(void);
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: exec_ctors
+ *
+ * Description:
+ *   Call static constructors
+ *
+ ****************************************************************************/
+
+static void exec_ctors(void)
+{
+  for (void (**ctor)(void) = &_sctors; ctor != &_ectors; ctor++)
+    {
+      (*ctor)();
+    }
+}
+
+/****************************************************************************
+ * Name: exec_dtors
+ *
+ * Description:
+ *   Call static destructors
+ *
+ ****************************************************************************/
+
+static void exec_dtors(void)
+{
+  for (void (**dtor)(void) = &_sdtors; dtor != &_edtors; dtor++)
+    {
+      (*dtor)();
+    }
+}
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -124,9 +171,11 @@ void _start(int argc, char *argv[])
 
   /* Call C++ constructors */
 
+  exec_ctors();
+
   /* Setup so that C++ destructors called on task exit */
 
-  /* REVISIT: Missing logic */
+  atexit(exec_dtors);
 
   /* Call the main() entry point passing argc and argv. */