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sysdeps/init_array: Add PREINIT_FUNCTION to crti.S

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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.

2018-01-29  Palmer Dabbelt  <palmer@sifive.com>

        * sysdeps/init_array/crti.S (.section .init_array): Add
        PREINIT_FUNCTION when defined.
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Palmer Dabbelt 2018-01-25 10:33:18 -08:00
parent cdd14619a7
commit 532cf290d0
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@ -1,3 +1,8 @@
2018-01-29 Palmer Dabbelt <palmer@sifive.com>
* sysdeps/init_array/crti.S (.section .init_array): Add
PREINIT_FUNCTION when defined.
2018-01-29 Florian Weimer <fweimer@redhat.com>
[BZ #22701]

14
sysdeps/init_array/crti.S
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@ -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