[v7,01/17] sysdeps/init_array: Add PREINIT_FUNCTION to crti.S
Commit Message
The RISC-V port contains a crti.S that simply contains a link to
PREINIT_FUNCTION (when defined). As this should be entirely generic,
Joseph Myers suggested that we update the generic init_array version to
contain this. Since RISC-V is the only user of init_array this won't
break any existing ports.
2018-01-26 Palmer Dabbelt <palmer@sifive.com>
* sysdeps/init_array/crti.S (.section .init_array): Add
PREINIT_FUNCTION when defined.
---
sysdeps/init_array/crti.S | 14 ++++++++++++++
1 file changed, 14 insertions(+)
@@ -11,3 +11,17 @@
But new configurations without compatibility concerns for
toolchains without .init_array support can use this to avoid the
superfluous .init and .fini boilerplate code. */
+
+#ifdef PREINIT_FUNCTION
+
+#if PREINIT_FUNCTION_WEAK
+# error PREINIT_FUNCTION_WEAK is unsupported
+#endif
+
+/* This arranges for PREINIT_FUNCTION to be called upon loading a library that
+ contains crti.o. */
+
+ .section .init_array,"a",%init_array
+ .dc.a PREINIT_FUNCTION
+
+#endif