[Bug target/85388] Missing ENDBR after __morestack call

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85388

--- Comment #6 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed Apr 18 19:14:28 2018
New Revision: 259475

URL: https://gcc.gnu.org/viewcvs?rev=259475&root=gcc&view=rev
Log:
i386: Insert ENDBR after __morestack call

Since __morestack will jump back to its callee via indirect call, we
need to insert ENDBR after calling __morestack.

gcc/

        PR target/85388
        * config/i386/i386.c (ix86_expand_split_stack_prologue): Insert
        ENDBR after calling __morestack.

gcc/testsuite/

        PR target/85388
        * gcc.dg/pr85388-1.c: New test.
        * gcc.dg/pr85388-2.c: Likewise.
        * gcc.dg/pr85388-3.c: Likewise.
        * gcc.dg/pr85388-4.c: Likewise.
        * gcc.dg/pr85388-5.c: Likewise.
        * gcc.dg/pr85388-6.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/pr85388-1.c
    trunk/gcc/testsuite/gcc.dg/pr85388-2.c
    trunk/gcc/testsuite/gcc.dg/pr85388-3.c
    trunk/gcc/testsuite/gcc.dg/pr85388-4.c
    trunk/gcc/testsuite/gcc.dg/pr85388-5.c
    trunk/gcc/testsuite/gcc.dg/pr85388-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog