* config/arm/arm.h (NEED_PLT_GOT): New macro. Set to 0 if not

already defined.
* config/arm/elf.h (NEED_PLT_GOT): Define to flag_pic.
* config/arm/arm.md (call_symbol, call_value_symbol et al.): If
NEED_PLT_GOT is true, add explicit "(PLT)" to generated branches.
* config/arm/arm.c (output_func_epilogue,
output_return_instruction): Likewise for calls to abort.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26839 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e5f2831..fc52fc1 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+Sat May  8 06:23:21 1999  Philip Blundell  <pb@nexus.co.uk>
+
+       Based on patch by Scott Bambrough:
+       * config/arm/arm.h (NEED_PLT_GOT): New macro.  Set to 0 if not
+       already defined.
+       * config/arm/elf.h (NEED_PLT_GOT): Define to flag_pic.
+       * config/arm/arm.md (call_symbol, call_value_symbol et al.): If 
+       NEED_PLT_GOT is true, add explicit "(PLT)" to generated branches.
+       * config/arm/arm.c (output_func_epilogue, 
+       output_return_instruction): Likewise for calls to abort.
+
 Sat May  8 01:57:58 1999  Donn Terry (donn@interix.com)
 
        * calls.c (rtx_for_function_call): Extend function pointer being

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 03891cd..e2fe037 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -5299,7 +5299,8 @@ output_return_instruction (operand, really_return, reverse)
 
       /* Otherwise, trap an attempted return by aborting. */
       ops[0] = operand;
-      ops[1] = gen_rtx_SYMBOL_REF (Pmode, "abort");
+      ops[1] = gen_rtx_SYMBOL_REF (Pmode, NEED_PLT_GOT ? "abort(PLT)" 
+                                  : "abort");
       assemble_external_libcall (ops[1]);
       output_asm_insn (reverse ? "bl%D0\t%a1" : "bl%d0\t%a1", ops);
       return "";
@@ -5553,7 +5554,8 @@ output_func_epilogue (f, frame_size)
   /* A volatile function should never return.  Call abort.  */
   if (TARGET_ABORT_NORETURN && volatile_func)
     {
-      rtx op = gen_rtx_SYMBOL_REF (Pmode, "abort");
+      rtx op;
+      op = gen_rtx_SYMBOL_REF (Pmode, NEED_PLT_GOT ? "abort(PLT)" : "abort");
       assemble_external_libcall (op);
       output_asm_insn ("bl\t%a0", &op);
       goto epilogue_done;

diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index b15fe21..ad2b865 100644 (file)
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -476,6 +476,11 @@ extern int arm_is_6_or_7;
 #define TARGET_MEM_FUNCTIONS 1
 
 #define OVERRIDE_OPTIONS  arm_override_options ()
+
+/* Nonzero if PIC code requires explicit qualifiers to generate
+   PLT and GOT relocs rather than the assembler doing so implicitly.
+   Subtargets can override this if required.  */
+#define NEED_PLT_GOT   0
 \f
 /* Target machine storage Layout.  */
 

diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index cf132bc..5696e11 100644 (file)
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -4246,7 +4246,10 @@
         (match_operand:SI 1 "general_operand" "g"))
    (clobber (reg:SI 14))]
   "GET_CODE (operands[0]) == SYMBOL_REF"
-  "bl%?\\t%a0"
+  "*
+  {
+    return NEED_PLT_GOT ? \"bl%?\\t%a0(PLT)\" : \"bl%?\\t%a0\";
+  }"
 [(set_attr "type" "call")])
 
 (define_insn "*call_value_symbol"
@@ -4255,7 +4258,10 @@
        (match_operand:SI 2 "general_operand" "g")))
    (clobber (reg:SI 14))]
   "GET_CODE(operands[1]) == SYMBOL_REF"
-  "bl%?\\t%a1"
+  "*
+  {
+    return NEED_PLT_GOT ? \"bl%?\\t%a1(PLT)\" : \"bl%?\\t%a1\";
+  }"
 [(set_attr "type" "call")])
 
 ;; Often the return insn will be the same as loading from memory, so set attr
@@ -5993,7 +5999,7 @@
   }
 
   output_return_instruction (NULL, FALSE, FALSE);
-  return \"b%?\\t%a0\";
+  return NEED_PLT_GOT ? \"b%?\\t%a0(PLT)\" : \"b%?\\t%a0\";
 }"
 [(set_attr "type" "call")
  (set_attr "length" "8")])
@@ -6021,7 +6027,7 @@
   }
 
   output_return_instruction (NULL, FALSE, FALSE);
-  return \"b%?\\t%a1\";
+  return NEED_PLT_GOT ? \"b%?\\t%a1(PLT)\" : \"b%?\\t%a1\";
 }"
 [(set_attr "type" "call")
  (set_attr "length" "8")])

diff --git a/gcc/config/arm/elf.h b/gcc/config/arm/elf.h
index e6d8eb7..d2ba8bb 100644 (file)
--- a/gcc/config/arm/elf.h
+++ b/gcc/config/arm/elf.h
@@ -335,4 +335,7 @@ do {                                                \
   do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
        fputc ('\n', FILE); } while (0)
 
+/* For PIC code we need to explicitly specify (PLT) and (GOT) relocs.  */
+#define NEED_PLT_GOT   flag_pic
+
 #include "arm/aout.h"