diff options
Diffstat (limited to 'toolchain/gcc/4.2.1/906-avr32-use-rjmp-instead-of-got-when-jumping.patch')
| -rw-r--r-- | toolchain/gcc/4.2.1/906-avr32-use-rjmp-instead-of-got-when-jumping.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/toolchain/gcc/4.2.1/906-avr32-use-rjmp-instead-of-got-when-jumping.patch b/toolchain/gcc/4.2.1/906-avr32-use-rjmp-instead-of-got-when-jumping.patch new file mode 100644 index 000000000..5d3c8d18a --- /dev/null +++ b/toolchain/gcc/4.2.1/906-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 |