Move tilegx, tilepro, and linux-generic from ports to libc.

I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.

1 files changed, 20 insertions, 0 deletions

diff --git a/sysdeps/tile/stackguard-macros.h b/sysdeps/tile/stackguard-macros.h
new file mode 100644
index 0000000000..f2e041b99b
--- /dev/null
+++ b/sysdeps/tile/stackguard-macros.h
@@ -0,0 +1,20 @@
+#include <bits/wordsize.h>
+
+#ifdef __tilegx__
+# if __WORDSIZE == 64
+#  define STACK_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -16; ld %0, %0" : "=r" (x)); x; })
+#  define POINTER_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -24; ld %0, %0" : "=r" (x)); x; })
+# else
+#  define STACK_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -8; ld4s %0, %0" : "=r" (x)); x; })
+#  define POINTER_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -12; ld4s %0, %0" : "=r" (x)); x; })
+# endif
+#else
+# define STACK_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -8; lw %0, %0" : "=r" (x)); x; })
+# define POINTER_CHK_GUARD \
+  ({ uintptr_t x; asm ("addi %0, tp, -12; lw %0, %0" : "=r" (x)); x; })
+#endif