* alpha-tdep.c (alpha_supply_int_regs, alpha_fill_int_regs): New.

[deliverable/binutils-gdb.git] / gdb / alpha-osf1-tdep.c

diff --git a/gdb/alpha-osf1-tdep.c b/gdb/alpha-osf1-tdep.c
index 12320519ae8108f1aebcd6e49fad3737ba9ea940..26e1790760766d5228253686b32d31da7a88345d 100644 (file)
--- a/gdb/alpha-osf1-tdep.c
+++ b/gdb/alpha-osf1-tdep.c
@@ -1,5 +1,5 @@
 /* Target-dependent code for OSF/1 on Alpha.
-   Copyright 2002 Free Software Foundation, Inc.
+   Copyright 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -22,6 +22,8 @@
 #include "frame.h"
 #include "gdbcore.h"
 #include "value.h"
+#include "osabi.h"
+#include "gdb_string.h"
 
 #include "alpha-tdep.h"
 
@@ -41,7 +43,7 @@ alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
 static int
 alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 {
-  return (func_name != NULL && STREQ ("__sigtramp", func_name));
+  return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
 }
 
 static CORE_ADDR
@@ -51,6 +53,30 @@ alpha_osf1_sigcontext_addr (struct frame_info *frame)
                                           : frame->frame, 8));
 }
 
+/* This is the definition of CALL_DUMMY_ADDRESS.  It's a heuristic that is used
+   to find a convenient place in the text segment to stick a breakpoint to
+   detect the completion of a target function call (ala call_function_by_hand).
+ */
+
+static CORE_ADDR
+alpha_call_dummy_address (void)
+{
+  CORE_ADDR entry;
+  struct minimal_symbol *sym;
+
+  entry = entry_point_address ();
+
+  if (entry != 0)
+    return entry;
+
+  sym = lookup_minimal_symbol ("_Prelude", NULL, symfile_objfile);
+
+  if (!sym || MSYMBOL_TYPE (sym) != mst_text)
+    return 0;
+  else
+    return SYMBOL_VALUE_ADDRESS (sym) + 4;
+}
+
 static void
 alpha_osf1_init_abi (struct gdbarch_info info,
                      struct gdbarch *gdbarch)
@@ -58,6 +84,15 @@ alpha_osf1_init_abi (struct gdbarch_info info,
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
   set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp);
+  /* The next/step support via procfs on OSF1 is broken when running
+     on multi-processor machines. We need to use software single stepping
+     instead.  */
+  set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
+
+  /* Alpha OSF/1 inhibits execution of code on the stack.  But there is
+     no need for a dummy on the Alpha.  PUSH_ARGUMENTS takes care of all
+     argument handling and bp_call_dummy takes care of stopping the dummy.  */
+  set_gdbarch_call_dummy_address (gdbarch, alpha_call_dummy_address);
 
   tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
   tdep->sigcontext_addr = alpha_osf1_sigcontext_addr;
@@ -69,5 +104,6 @@ alpha_osf1_init_abi (struct gdbarch_info info,
 void
 _initialize_alpha_osf1_tdep (void)
 {
-  gdbarch_register_osabi (bfd_arch_alpha, GDB_OSABI_OSF1, alpha_osf1_init_abi);
+  gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1,
+                         alpha_osf1_init_abi);
 }