On Sat, 5 Sep 2009, Maxim Kuvyrkov wrote:
Finn Thain wrote:
...
I understand that the current GCC (4.4) lacks the necessary patches,
and 4.5 is still uncooked (and that's a scary prospect). Can someone
confirm that this is the necessary patch for 4.4:
http://gcc.gnu.org/ml/gcc-patches/2009-05/msg01024.html
I think GCC 4.4 should be good enough.
I tried patching 4.4.1 and the patch was rejected. It expects
m68k_legitimize_address() to have been declared and defined, but that
routine isn't in gcc-4.4.
So, I edited the patch (see diff below). What bothers me is that this
removes the call to the new m68k_tls_symbol_p() routine:
../../gcc-4.4.1/gcc/config/m68k/m68k.c: At top level:
../../gcc-4.4.1/gcc/config/m68k/m68k.c:2553: warning: 'm68k_tls_symbol_p' defined but not used
The compiler appears to work, but I haven't run any executable it produced
as yet. When we get eglibc-2.10 I plan to run the testsuites on '040
hardware, which is going to take a long time to complete. It would be nice
to know in advance whether this naive attempt at a backport is likely to
work or not (?)
Finn
--- gcc-m68k-support-for-tls.patch 2009-09-13 13:16:03.475546800 +1000
+++ gcc-m68k-support-for-tls-backport.patch 2009-09-13 13:16:03.475546800 +1000
@@ -574,12 +574,11 @@
enum reg_class regno_reg_class[] =
{
-@@ -143,11 +144,13 @@ static tree m68k_handle_fndecl_attribute
+@@ -143,10 +144,12 @@ static tree m68k_handle_fndecl_attribute
static void m68k_compute_frame_layout (void);
static bool m68k_save_reg (unsigned int regno, bool interrupt_handler);
static bool m68k_ok_for_sibcall_p (tree, tree);
+static bool m68k_tls_symbol_p (rtx);
- static rtx m68k_legitimize_address (rtx, rtx, enum machine_mode);
static bool m68k_rtx_costs (rtx, int, int, int *, bool);
#if M68K_HONOR_TARGET_STRICT_ALIGNMENT
static bool m68k_return_in_memory (const_tree, const_tree);
@@ -613,16 +612,6 @@
&& crtl->uses_pic_offset_table)
insn = emit_insn (gen_load_got (pic_offset_table_rtx));
}
-@@ -1431,6 +1441,9 @@ m68k_legitimize_sibcall_address (rtx x)
- rtx
- m68k_legitimize_address (rtx x, rtx oldx, enum machine_mode mode)
- {
-+ if (m68k_tls_symbol_p (x))
-+ return m68k_legitimize_tls_address (x);
-+
- if (GET_CODE (x) == PLUS)
- {
- int ch = (x) != (oldx);
@@ -1849,7 +1862,7 @@ m68k_illegitimate_symbolic_constant_p (r
&& !offset_within_block_p (base, INTVAL (offset)))
return true;
--
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