2002-08-15 Michael Snyder <msnyder@redhat.com>

	* mips-tdep.c (mips_gdbarch_init): Set gdbarch read_sp to
	mips_read_sp.
        * config/mips/tm-mips.h (TARGET_READ_SP): Delete.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f7c3e51..bf15e89 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -7,9 +7,12 @@
        * config/mips/tm-mips.h (REGISTER_CONVERT_TO_VIRTUAL, 
        REGISTER_CONVERT_TO_RAW, REGISTER_CONVERTIBLE, 
        MAX_REGISTER_RAW_SIZE, MAX_REGISTER_VIRTUAL_SIZE): Delete.
+       (TARGET_READ_SP): Delete.
        * mips-tdep.c (mips_gdbarch_init): Set the above in the gdbarch.
        (mips_register_convertible, mips_register_convert_to_virtual,
        mips_register_convert_to_raw): Make static.
+       (mips_read_sp): New function.
+       (mips_gdbarch_init): Set gdbarch read_sp to mips_read_sp.
 
 2002-08-15  Andrew Cagney  <ac131313@redhat.com>
 

diff --git a/gdb/config/mips/tm-mips.h b/gdb/config/mips/tm-mips.h
index 7e667b7..4552d96 100644 (file)
--- a/gdb/config/mips/tm-mips.h
+++ b/gdb/config/mips/tm-mips.h
@@ -51,10 +51,6 @@ struct value;
 
 #define DEFAULT_MIPS_TYPE "generic"
 
-/* Remove useless bits from the stack pointer.  */
-
-#define TARGET_READ_SP() ADDR_BITS_REMOVE (read_register (SP_REGNUM))
-
 /* Offset from address of function to start of its code.
    Zero on most machines.  */
 

diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index a054c13..478be20 100644 (file)
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -513,6 +513,14 @@ mips_register_virtual_type (int reg)
     }
 }
 
+/* TARGET_READ_SP -- Remove useless bits from the stack pointer.  */
+
+static CORE_ADDR
+mips_read_sp (void)
+{
+  return ADDR_BITS_REMOVE (read_register (SP_REGNUM));
+}
+
 /* Should the upper word of 64-bit addresses be zeroed? */
 enum auto_boolean mask_address_var = AUTO_BOOLEAN_AUTO;
 
@@ -2294,9 +2302,11 @@ mips_frame_chain (struct frame_info *frame)
      we loop forever if we see a zero size frame.  */
   if (PROC_FRAME_REG (proc_desc) == SP_REGNUM
       && PROC_FRAME_OFFSET (proc_desc) == 0
-  /* The previous frame from a sigtramp frame might be frameless
-     and have frame size zero.  */
-      && !frame->signal_handler_caller)
+      /* The previous frame from a sigtramp frame might be frameless
+        and have frame size zero.  */
+      && !frame->signal_handler_caller
+      /* Check if this is a call dummy frame.  */
+      && frame->pc != mips_call_dummy_address ())
     return 0;
   else
     return get_frame_pointer (frame, proc_desc);
@@ -2959,7 +2969,7 @@ mips_o32o64_push_arguments (int nargs,
   argreg = A0_REGNUM;
   float_argreg = FPA0_REGNUM;
 
-  /* the struct_return pointer occupies the first parameter-passing reg */
+  /* The struct_return pointer occupies the first parameter-passing reg.  */
   if (struct_return)
     {
       if (mips_debug)
@@ -3346,13 +3356,22 @@ mips_pop_frame (void)
   if (frame->saved_regs == NULL)
     FRAME_INIT_SAVED_REGS (frame);
   for (regnum = 0; regnum < NUM_REGS; regnum++)
-    {
-      if (regnum != SP_REGNUM && regnum != PC_REGNUM
-         && frame->saved_regs[regnum])
-       write_register (regnum,
-                       read_memory_integer (frame->saved_regs[regnum],
-                                            MIPS_SAVED_REGSIZE));
-    }
+    if (regnum != SP_REGNUM && regnum != PC_REGNUM
+       && frame->saved_regs[regnum])
+      {
+       /* Floating point registers must not be sign extended, 
+          in case MIPS_SAVED_REGSIZE = 4 but sizeof (FP0_REGNUM) == 8.  */
+
+       if (FP0_REGNUM <= regnum && regnum < FP0_REGNUM + 32)
+         write_register (regnum,
+                         read_memory_unsigned_integer (frame->saved_regs[regnum],
+                                                       MIPS_SAVED_REGSIZE));
+       else
+         write_register (regnum,
+                         read_memory_integer (frame->saved_regs[regnum],
+                                              MIPS_SAVED_REGSIZE));
+      }
+
   write_register (SP_REGNUM, new_sp);
   flush_cached_frames ();
 
@@ -4079,15 +4098,28 @@ return_value_location (struct type *valtype,
       if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
          && len < MIPS_SAVED_REGSIZE)
        {
-         /* "un-left-justify" the value in the low register */
-         lo->reg_offset = MIPS_SAVED_REGSIZE - len;
-         lo->len = len;
+         if ((gdbarch_tdep (current_gdbarch) -> mips_abi == MIPS_ABI_N32 
+              || gdbarch_tdep (current_gdbarch) -> mips_abi == MIPS_ABI_N64)
+             && (TYPE_CODE (valtype) == TYPE_CODE_STRUCT 
+                 || TYPE_CODE (valtype) == TYPE_CODE_UNION))
+           {
+             /* Values are already aligned in the low register.  */
+             lo->reg_offset = 0;
+           }
+         else
+           {
+             /* "un-left-justify" the value in the low register */
+             lo->reg_offset = MIPS_SAVED_REGSIZE - len;
+           }
          hi->reg_offset = 0;
+         lo->len = len;
          hi->len = 0;
        }
       else if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
               && len > MIPS_SAVED_REGSIZE      /* odd-size structs */
               && len < MIPS_SAVED_REGSIZE * 2
+              && gdbarch_tdep (current_gdbarch) -> mips_abi != MIPS_ABI_N32 
+              && gdbarch_tdep (current_gdbarch) -> mips_abi != MIPS_ABI_N64
               && (TYPE_CODE (valtype) == TYPE_CODE_STRUCT ||
                   TYPE_CODE (valtype) == TYPE_CODE_UNION))
        {
@@ -4925,6 +4957,7 @@ mips_gdbarch_init (struct gdbarch_info info,
        }
     }
 
+#undef MIPS_DEFAULT_ABI
 #ifdef MIPS_DEFAULT_ABI
   if (mips_abi == MIPS_ABI_UNKNOWN)
     mips_abi = MIPS_DEFAULT_ABI;
@@ -5170,7 +5203,7 @@ mips_gdbarch_init (struct gdbarch_info info,
   set_gdbarch_read_pc (gdbarch, mips_read_pc);
   set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
   set_gdbarch_read_fp (gdbarch, generic_target_read_fp);
-  set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
+  set_gdbarch_read_sp (gdbarch, mips_read_sp);
   set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
 
   /* Add/remove bits from an address. The MIPS needs be careful to