amd64: Integer parameters in function calls on Windows.

gdb/ChangeLog:

        * i386-tdep.h (enum amd64_reg_class): New, moved here from
        amd64-tdep.c.
        (struct gdbarch_tdep): Add fields call_dummy_num_integer_regs,
        call_dummy_integer_regs, and classify.
        * amd64-tdep.h (amd64_classify): Add declaration.
        * amd64-tdep.c (amd64_dummy_call_integer_regs): New static constant.
        (amd64_reg_class): Delete, moved to i386-tdep.h.
        (amd64_classify): Make non-static.  Move declaration to amd64-tdep.h.
        Replace call to amd64_classify by call to tdep->classify.
        (amd64_push_arguments): Get the list of registers to use for
        passing integer parameters from the gdbarch tdep structure,
        rather than using a hardcoded one.  Replace calls to amd64_classify
        by calls to tdep->classify.
        (amd64_push_dummy_call): Get the register number used for
        the "hidden" argument from tdep->call_dummy_integer_regs.
        (amd64_init_abi): Initialize tdep->call_dummy_num_integer_regs
        and tdep->call_dummy_integer_regs.  Set tdep->classify.
        * amd64-windows-tdep.c: Add include of gdbtypes.h.
        (amd64_windows_dummy_call_integer_regs): New static global.
        (amd64_windows_classify): New function.
        (amd64_windows_init_abi): Initialize tdep->call_dummy_num_integer_regs
        tdep->call_dummy_integer_regs and tdep->classify.

gdb/testsuite/ChangeLog:

        * gdb.ada/call_pn: New testcase.

1 files changed, 24 insertions, 0 deletions

diff --git a/gdb/i386-tdep.h b/gdb/i386-tdep.h
index 6013bdf..d5b24fa 100644
--- a/gdb/i386-tdep.h
+++ b/gdb/i386-tdep.h
@@ -53,6 +53,20 @@ enum struct_return
   reg_struct_return		/* Return "short" structures in registers.  */
 };
 
+/* Register classes as defined in the AMD x86-64 psABI.  */
+
+enum amd64_reg_class
+{
+  AMD64_INTEGER,
+  AMD64_SSE,
+  AMD64_SSEUP,
+  AMD64_X87,
+  AMD64_X87UP,
+  AMD64_COMPLEX_X87,
+  AMD64_NO_CLASS,
+  AMD64_MEMORY
+};
+
 /* i386 architecture specific information.  */
 struct gdbarch_tdep
 {
@@ -62,6 +76,16 @@ struct gdbarch_tdep
   int gregset_num_regs;
   size_t sizeof_gregset;
 
+  /* The general-purpose registers used to pass integers when making
+     function calls.  This only applies to amd64, as all parameters
+     are passed through the stack on x86.  */
+  int call_dummy_num_integer_regs;
+  int *call_dummy_integer_regs;
+
+  /* Classify TYPE according to calling conventions, and store
+     the result in CLASS.  Used on amd64 only.  */
+  void (*classify) (struct type *type, enum amd64_reg_class class[2]);
+
   /* Floating-point registers.  */
   struct regset *fpregset;
   size_t sizeof_fpregset;