system/libffi: remove PaX crap, fix testsuite on ppc64

1 files changed, 0 insertions, 120 deletions

diff --git a/system/libffi/pax-dlmmap.patch b/system/libffi/pax-dlmmap.patch
deleted file mode 100644
index ec4150410..000000000
--- a/system/libffi/pax-dlmmap.patch
+++ /dev/null
@@ -1,120 +0,0 @@
-From 48d2e46528fb6e621d95a7fa194069fd136b712d Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Stefan=20B=C3=BChler?= <buehler@cert.uni-stuttgart.de>
-Date: Wed, 7 Sep 2016 15:49:48 +0200
-Subject: [PATCH 1/2] dlmmap_locked always needs locking as it always modifies
- execsize
-
----
- src/closures.c | 13 ++++---------
- 1 file changed, 4 insertions(+), 9 deletions(-)
-
-diff --git a/src/closures.c b/src/closures.c
-index 2e0ffb45..04d6e27f 100644
---- a/src/closures.c
-+++ b/src/closures.c
-@@ -769,16 +769,11 @@ dlmmap (void *start, size_t length, int prot,
- 	 MREMAP_DUP and prot at this point.  */
-     }
- 
--  if (execsize == 0 || execfd == -1)
--    {
--      pthread_mutex_lock (&open_temp_exec_file_mutex);
--      ptr = dlmmap_locked (start, length, prot, flags, offset);
--      pthread_mutex_unlock (&open_temp_exec_file_mutex);
-+  pthread_mutex_lock (&open_temp_exec_file_mutex);
-+  ptr = dlmmap_locked (start, length, prot, flags, offset);
-+  pthread_mutex_unlock (&open_temp_exec_file_mutex);
- 
--      return ptr;
--    }
--
--  return dlmmap_locked (start, length, prot, flags, offset);
-+  return ptr;
- }
- 
- /* Release memory at the given address, as well as the corresponding
-
-From 7aad5f895e2dfdb79d2ef67e1b231d21063e6511 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Stefan=20B=C3=BChler?= <buehler@cert.uni-stuttgart.de>
-Date: Wed, 7 Sep 2016 15:50:54 +0200
-Subject: [PATCH 2/2] ignore PaX EMUTRAMP flag; instead check for MPROTECT
-
-- code using ffi_closure_alloc doesn't necessarily generate gcc compatible trampolines; only those are allowed by PaX
-- if MPROTECT is enabled use the same workaround as is used for SELinux (double mmap())
----
- src/closures.c | 29 +++++++++++++----------------
- 1 file changed, 13 insertions(+), 16 deletions(-)
-
-diff --git a/src/closures.c b/src/closures.c
-index 04d6e27f..babecc1a 100644
---- a/src/closures.c
-+++ b/src/closures.c
-@@ -401,14 +401,15 @@ selinux_enabled_check (void)
- 
- #endif /* !FFI_MMAP_EXEC_SELINUX */
- 
--/* On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC. */
-+/* On PaX enable kernels that have MPROTECT enabled we can't use PROT_EXEC. */
- #ifdef FFI_MMAP_EXEC_EMUTRAMP_PAX
- #include <stdlib.h>
- 
--static int emutramp_enabled = -1;
-+/* -1: not read yet; 0: no PaX or MPROTECT disabled; 1: MPROTECT enabled.  */
-+static int mprotect_enabled = -1;
- 
- static int
--emutramp_enabled_check (void)
-+mprotect_enabled_check (void)
- {
-   char *buf = NULL;
-   size_t len = 0;
-@@ -422,9 +423,7 @@ emutramp_enabled_check (void)
-   while (getline (&buf, &len, f) != -1)
-     if (!strncmp (buf, "PaX:", 4))
-       {
--        char emutramp;
--        if (sscanf (buf, "%*s %*c%c", &emutramp) == 1)
--          ret = (emutramp == 'E');
-+        ret = (NULL != strchr (buf + 4, 'M'));
-         break;
-       }
-   free (buf);
-@@ -432,8 +431,9 @@ emutramp_enabled_check (void)
-   return ret;
- }
- 
--#define is_emutramp_enabled() (emutramp_enabled >= 0 ? emutramp_enabled \
--                               : (emutramp_enabled = emutramp_enabled_check ()))
-+#define is_mprotect_enabled() (mprotect_enabled >= 0 ? mprotect_enabled \
-+                               : (mprotect_enabled = mprotect_enabled_check ()))
-+
- #endif /* FFI_MMAP_EXEC_EMUTRAMP_PAX */
- 
- #elif defined (__CYGWIN__) || defined(__INTERIX)
-@@ -446,7 +446,7 @@ emutramp_enabled_check (void)
- #endif /* !defined(X86_WIN32) && !defined(X86_WIN64) */
- 
- #ifndef FFI_MMAP_EXEC_EMUTRAMP_PAX
--#define is_emutramp_enabled() 0
-+#define is_mprotect_enabled() 0
- #endif /* FFI_MMAP_EXEC_EMUTRAMP_PAX */
- 
- /* Declare all functions defined in dlmalloc.c as static.  */
-@@ -750,13 +750,10 @@ dlmmap (void *start, size_t length, int prot,
- 	  && flags == (MAP_PRIVATE | MAP_ANONYMOUS)
- 	  && fd == -1 && offset == 0);
- 
--  if (execfd == -1 && is_emutramp_enabled ())
--    {
--      ptr = mmap (start, length, prot & ~PROT_EXEC, flags, fd, offset);
--      return ptr;
--    }
--
--  if (execfd == -1 && !is_selinux_enabled ())
-+  /* -1 != execfd hints that we already decided to use dlmmap_locked
-+     last time.  If PaX MPROTECT or SELinux is active fallback to
-+     dlmmap_locked.  */
-+  if (execfd == -1 && !is_mprotect_enabled () && !is_selinux_enabled ())
-     {
-       ptr = mmap (start, length, prot | PROT_EXEC, flags, fd, offset);
-