From 082fc60dfca102f95d73f123f43060f3f34c0ff6 Mon Sep 17 00:00:00 2001
From: Richard Earnshaw <richard.earnshaw@arm.com>
Date: Wed, 6 Feb 2002 15:21:17 +0000
Subject: * arm-tdep.c: Include elf-bfd.h and coff/internal.h.
 (MSYMBOL_SET_SPECIAL, MSYMBOL_IS_SPECIAL, MSYMBOL_SIZE): Move defines to here
 from config/tm-arm.h. (coff_sym_is_thumb): Make static.
 (arm_elf_make_msymbol_special): New function.
 (arm_coff_make_msymbol_special): New function. * config/arm/tm-arm.h
 (MSYMBOL_SET_SPECIAL): Delete definition. (MSYMBOL_IS_SPECIAL, MSYMBOL_SIZE):
 Likewise. (coff_sym_is_thumb): Delete declaration.
 (arm_elf_make_msymbol_special): Declare. (arm_coff_make_msymbol_special):
 Declare. (ELF_MAKE_MSYMBOL_SPECIAL): Call arm_elf_make_msymbol_special.
 (COFF_MAKE_MSYMBOL_SPECIAL): Call arm_coff_make_msymbol_special.

---
 gdb/arm-tdep.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 60 insertions(+), 14 deletions(-)

(limited to 'gdb/arm-tdep.c')

diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 1726dad..3228842 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -33,6 +33,8 @@
 #include "doublest.h"
 #include "value.h"
 #include "solib-svr4.h"
+#include "elf-bfd.h"
+#include "coff/internal.h"
 
 /* Each OS has a different mechanism for accessing the various
    registers stored in the sigcontext structure.
@@ -64,7 +66,27 @@
 #define SIGCONTEXT_REGISTER_ADDRESS_P() 0
 #endif
 
-extern void _initialize_arm_tdep (void);
+/* Macros for setting and testing a bit in a minimal symbol that marks
+   it as Thumb function.  The MSB of the minimal symbol's "info" field
+   is used for this purpose. This field is already being used to store
+   the symbol size, so the assumption is that the symbol size cannot
+   exceed 2^31.
+
+   MSYMBOL_SET_SPECIAL	Actually sets the "special" bit.
+   MSYMBOL_IS_SPECIAL   Tests the "special" bit in a minimal symbol.
+   MSYMBOL_SIZE         Returns the size of the minimal symbol,
+   			i.e. the "info" field with the "special" bit
+   			masked out.  */
+
+#define MSYMBOL_SET_SPECIAL(msym)					\
+	MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym))	\
+					| 0x80000000)
+
+#define MSYMBOL_IS_SPECIAL(msym)				\
+	(((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
+
+#define MSYMBOL_SIZE(msym)				\
+	((long) MSYMBOL_INFO (msym) & 0x7fffffff)
 
 /* Number of different reg name sets (options). */
 static int num_flavor_options;
@@ -2282,6 +2304,43 @@ arm_linux_svr4_fetch_link_map_offsets (void)
     return lmp;
 }
 
+/* Test whether the coff symbol specific value corresponds to a Thumb
+   function.  */
+
+static int
+coff_sym_is_thumb (int val)
+{
+  return (val == C_THUMBEXT ||
+	  val == C_THUMBSTAT ||
+	  val == C_THUMBEXTFUNC ||
+	  val == C_THUMBSTATFUNC ||
+	  val == C_THUMBLABEL);
+}
+
+/* arm_coff_make_msymbol_special()
+   arm_elf_make_msymbol_special()
+   
+   These functions test whether the COFF or ELF symbol corresponds to
+   an address in thumb code, and set a "special" bit in a minimal
+   symbol to indicate that it does.  */
+   
+void
+arm_elf_make_msymbol_special(asymbol *sym, struct minimal_symbol *msym)
+{
+  /* Thumb symbols are of type STT_LOPROC, (synonymous with
+     STT_ARM_TFUNC).  */
+  if (ELF_ST_TYPE (((elf_symbol_type *)sym)->internal_elf_sym.st_info)
+      == STT_LOPROC)
+    MSYMBOL_SET_SPECIAL (msym);
+}
+
+void
+arm_coff_make_msymbol_special(int val, struct minimal_symbol *msym)
+{
+  if (coff_sym_is_thumb (val))
+    MSYMBOL_SET_SPECIAL (msym);
+}
+
 void
 _initialize_arm_tdep (void)
 {
@@ -2359,16 +2418,3 @@ The valid values are:\n");
   prologue_cache.saved_regs = (CORE_ADDR *)
     xcalloc (1, SIZEOF_FRAME_SAVED_REGS);
 }
-
-/* Test whether the coff symbol specific value corresponds to a Thumb
-   function.  */
-
-int
-coff_sym_is_thumb (int val)
-{
-  return (val == C_THUMBEXT ||
-	  val == C_THUMBSTAT ||
-	  val == C_THUMBEXTFUNC ||
-	  val == C_THUMBSTATFUNC ||
-	  val == C_THUMBLABEL);
-}
-- 
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