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authorJohn Voltz <john.voltz@gmail.com>2008-03-21 11:21:02 +0000
committerJohn Voltz <john.voltz@gmail.com>2008-03-21 11:21:02 +0000
commit577cec7bc6d6a1c2b914d0061cdc3cd2ac03e7f3 (patch)
treef9ba9004bf358831109e8eb1c029a70e393cbbb2 /toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch
parent7c54beb870cc7fb50c8a77689dab589d7cb90fb8 (diff)
downloadbuildroot-novena-577cec7bc6d6a1c2b914d0061cdc3cd2ac03e7f3.tar.gz
buildroot-novena-577cec7bc6d6a1c2b914d0061cdc3cd2ac03e7f3.zip
current avr32 gcc patches break x86 and possibly other systems. moving bad patches to separate directory until a proper fix is made. discovered by jacmet and Dr. Nigel Kukard
Diffstat (limited to 'toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch')
-rw-r--r--toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch85
1 files changed, 85 insertions, 0 deletions
diff --git a/toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch b/toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch
new file mode 100644
index 000000000..5d3c8d18a
--- /dev/null
+++ b/toolchain/gcc/4.2.1/avr32_patches_break_x86/906-avr32-use-rjmp-instead-of-got-when-jumping.patch
@@ -0,0 +1,85 @@
+Index: a/gcc/config/avr32/avr32.c
+===================================================================
+--- a/gcc/config/avr32/avr32.c (revision 32101)
++++ b/gcc/config/avr32/avr32.c (working copy)
+@@ -695,8 +695,7 @@
+
+
+ if (!avr32_const_ok_for_constraint_p (mi_delta, 'I', "Is21")
+- || vcall_offset
+- || flag_pic)
++ || vcall_offset)
+ {
+ fputs ("\tpushm\tlr\n", file);
+ }
+@@ -728,47 +727,23 @@
+ }
+
+
+- if ( (!avr32_const_ok_for_constraint_p (mi_delta, 'I', "Is21")
+- || vcall_offset)
+- && !flag_pic )
++ if (!avr32_const_ok_for_constraint_p (mi_delta, 'I', "Is21")
++ || vcall_offset)
+ {
+ fputs ("\tpopm\tlr\n", file);
+ }
+-
+- if (flag_pic)
+- {
+- /* Load the got into lr and then load the pointer
+- to the function from the got and put it on the stack.
+- We can then call the function and restore lr by issuing
+- a doubleword load from the stack. We do not use a popm/ldm
+- since it will be treated as a return and might need a flushing
+- of the return-stack if available. */
+- rtx label = gen_label_rtx ();
+- /* Load the got. */
+- fputs ("\tlddpc\tlr, 0f\n", file);
+- (*targetm.asm_out.internal_label) (file, "L",
+- CODE_LABEL_NUMBER (label));
+- fputs ("\trsub\tlr, pc\n", file);
+- /* Load the function pointer. */
+- fputs ("\tld.w\tlr, lr[", file);
+- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
+- fputs ("@got]\n", file);
+- /* Push the function pointer on the stack.*/
+- fputs ("\tpushm\tlr\n", file);
+- /* Restore the old lr value and load the function pointer into
+- pc. */
+- fputs ("\tld.d\tlr,sp++\n", file);
+- fprintf (file, "\t.align 2\n");
+- fprintf (file, "0:\t.long\t.L%d - _GLOBAL_OFFSET_TABLE_\n", CODE_LABEL_NUMBER (label));
+- }
+- else
+- {
+- fprintf (file, "\tlddpc\tpc, 0f\n");
+- fprintf (file, "\t.align 2\n");
+- fputs ("0:\t.long\t", file);
+- assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
+- fputc ('\n', file);
+- }
++
++ /* Jump to the function. We assume that we can use an rjmp since the
++ function to jump to is local and probably not too far away from
++ the thunk. If this assumption proves to be wrong we could implement
++ this jump by calculating the offset between the jump source and destination
++ and put this in the constant pool and then perform an add to pc.
++ This would also be legitimate PIC code. But for now we hope that an rjmp
++ will be sufficient...
++ */
++ fputs ("\trjmp\t", file);
++ assemble_name (file, XSTR (XEXP (DECL_RTL (function), 0), 0));
++ fputc ('\n', file);
+ }
+
+ /* Implements target hook vector_mode_supported. */
+@@ -1742,7 +1717,7 @@
+ if (TREE_CODE (*node) != FUNCTION_DECL)
+ {
+ warning ("`%s' attribute only applies to functions",
+- IDENTIFIER_POINTER (name));
++ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ /* FIXME: the argument if any is checked for type attributes; should it