Enable multi-arch for i386.

gdb/ChangeLog

@@ -1,3 +1,14 @@
+Wed Nov  7 20:38:14 2001  Andrew Cagney  <cagney@redhat.com>
+
+	* i386-tdep.c: Include "i386-tdep.h".
+	(XMALLOC): Define.
+	(i386_gdbarch_init): New function.
+	(_initialize_i386_tdep): Register bfd_arch_i386.
+	* config/i386/tm-i386.h (GDB_MULTI_ARCH): Define as
+ 	GDB_MULTI_ARCH_PARTIAL.
+	* i386-tdep.h: When partially multi-arch, conditionally define
+ 	all macros.
+
 Wed Nov  7 20:45:32 2001  Andrew Cagney  <cagney@redhat.com>
 
 	* i386-tdep.c (set_disassembly_flavor): Delete function.

gdb/config/i386/tm-i386.h

@@ -22,6 +22,8 @@
 #ifndef TM_I386_H
 #define TM_I386_H 1
 
+#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
+
 #include "regcache.h"
 
 /* Forward declarations for prototypes.  */

gdb/i386-tdep.c

@@ -34,9 +34,12 @@
 #include "regcache.h"
 #include "doublest.h"
 #include "value.h"
-
+#include "i386-tdep.h"
 #include "gdb_assert.h"
 
+#undef XMALLOC
+#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
+
 /* Names of the registers.  The first 10 registers match the register
    numbering scheme used by GCC for stabs and DWARF.  */
 static char *i386_register_names[] =
@@ -1195,12 +1198,48 @@ gdb_print_insn_i386 (bfd_vma memaddr, disassemble_info *info)
 
 
 
+struct gdbarch *
+i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+  struct gdbarch_tdep *tdep
+  struct gdbarch *gdbarch;
+
+  /* For the moment there is only one i386 architecture.  */
+  if (arches != NULL)
+    return arches->gdbarch;
+
+  /* Allocate space for the new architecture.  */
+  tdep = XMALLOC (struct gdbarch_tdep);
+  gdbarch = gdbarch_alloc (&info, tdep);
+
+  set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
+
+  /* Call dummy code.  */
+  set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+  set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 5);
+  set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
+  set_gdbarch_call_dummy_p (gdbarch, 1);
+  set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
+
+  set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
+  set_gdbarch_push_arguments (gdbarch, i386_push_arguments);
+
+  set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack);
+
+  /* NOTE: tm-i386nw.h and tm-i386v4.h override this.  */
+  set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid);
+
+  return gdbarch;
+}
+
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 void _initialize_i386_tdep (void);
 
 void
 _initialize_i386_tdep (void)
 {
+  register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
+
   /* Initialize the table saying where each register starts in the
      register file.  */
   {

gdb/i386-tdep.h

@@ -22,16 +22,34 @@
 #ifndef I386_TDEP_H
 #define I386_TDEP_H
 
+#if !defined (FPU_REG_RAW_SIZE) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FPU_REG_RAW_SIZE 10
+#endif
 
+#if !defined (XMM0_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define XMM0_REGNUM FIRST_XMM_REGNUM
+#endif
+#if !defined (FIRST_FPU_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FIRST_FPU_REGNUM FP0_REGNUM
+#endif
+#if !defined (LAST_FPU_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define LAST_FPU_REGNUM (gdbarch_tdep (current_gdbarch)->last_fpu_regnum)
+#endif
+#if !defined (FIRST_XMM_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FIRST_XMM_REGNUM (gdbarch_tdep (current_gdbarch)->first_xmm_regnum)
+#endif
+#if !defined (LAST_XMM_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define LAST_XMM_REGNUM (gdbarch_tdep (current_gdbarch)->last_xmm_regnum)
+#endif
+#if !defined (MXCSR_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define MXCSR_REGNUM (gdbarch_tdep (current_gdbarch)->mxcsr_regnum)
+#endif
+#if !defined (FIRST_FPU_CTRL_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FIRST_FPU_CTRL_REGNUM (gdbarch_tdep (current_gdbarch)->first_fpu_ctrl_regnum)
+#endif
+#if !defined (LAST_FPU_CTRL_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define LAST_FPU_CTRL_REGNUM (FIRST_FPU_CTRL_REGNUM + 7)
+#endif
 
 /* All of these control registers (except for FCOFF and FDOFF) are
    sixteen bits long (at most) in the FPU, but are zero-extended to
@@ -39,22 +57,38 @@
    compute the size of the control register file, and somewhat easier
    to convert to and from the FSAVE instruction's 32-bit format.  */
 /* FPU control word.  */
+#if !defined (FCTRL_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FCTRL_REGNUM (FIRST_FPU_CTRL_REGNUM)
+#endif
 /* FPU status word.  */
+#if !defined (FSTAT_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FSTAT_REGNUM (FIRST_FPU_CTRL_REGNUM + 1)
+#endif
 /* FPU register tag word.  */
+#if !defined (FTAG_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FTAG_REGNUM  (FIRST_FPU_CTRL_REGNUM + 2)
+#endif
 /* FPU instruction's code segment selector 16 bits, called "FPU Instruction
    Pointer Selector" in the x86 manuals.  */
+#if !defined (FCS_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FCS_REGNUM   (FIRST_FPU_CTRL_REGNUM + 3)
+#endif
 /* FPU instruction's offset within segment ("Fpu Code OFFset").  */
+#if !defined (FCOFF_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FCOFF_REGNUM (FIRST_FPU_CTRL_REGNUM + 4)
+#endif
 /* FPU operand's data segment.  */
+#if !defined (FDS_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FDS_REGNUM   (FIRST_FPU_CTRL_REGNUM + 5)
+#endif
 /* FPU operand's offset within segment.  */
+#if !defined (FDOFF_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FDOFF_REGNUM (FIRST_FPU_CTRL_REGNUM + 6)
+#endif
 /* FPU opcode, bottom eleven bits.  */
+#if !defined (FOP_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define FOP_REGNUM   (FIRST_FPU_CTRL_REGNUM + 7)
+#endif
 
 /* i386 architecture specific information.  */
 struct gdbarch_tdep
@@ -66,8 +100,14 @@ struct gdbarch_tdep
   int first_fpu_ctrl_regnum;
 };
 
+#if !defined (IS_FP_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define IS_FP_REGNUM(n) (FIRST_FPU_REGNUM <= (n) && (n) <= LAST_FPU_REGNUM)
+#endif
+#if !defined (IS_FPU_CTRL_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define IS_FPU_CTRL_REGNUM(n) (FIRST_FPU_CTRL_REGNUM <= (n) && (n) <= LAST_FPU_CTRL_REGNUM)
+#endif
+#if !defined (IS_SSE_REGNUM) || (GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
 #define IS_SSE_REGNUM(n) (FIRST_XMM_REGNUM <= (n) && (n) <= LAST_XMM_REGNUM)
+#endif
 
 #endif