-/* Print NS 32000 instructions for GDB, the GNU debugger.
+/* Target dependent code for the NS32000, for GDB.
Copyright 1986, 1988, 1991, 1992, 1994, 1995, 1998, 1999, 2000, 2001,
2002 Free Software Foundation, Inc.
#include "defs.h"
#include "frame.h"
+#include "gdbtypes.h"
#include "gdbcore.h"
+#include "inferior.h"
+#include "regcache.h"
+#include "target.h"
+
+#include "arch-utils.h"
+
+#include "ns32k-tdep.h"
+#include "gdb_string.h"
static int sign_extend (int value, int bits);
static CORE_ADDR ns32k_get_enter_addr (CORE_ADDR);
static int ns32k_localcount (CORE_ADDR enter_pc);
+static void flip_bytes (void *, int);
-char *
+static const char *
ns32k_register_name_32082 (int regno)
{
static char *register_names[] =
return (register_names[regno]);
}
-char *
+static const char *
ns32k_register_name_32382 (int regno)
{
static char *register_names[] =
return (register_names[regno]);
}
-int
+static int
ns32k_register_byte_32082 (int regno)
{
- if (regno >= LP0_REGNUM)
- return (LP0_REGNUM * 4) + ((regno - LP0_REGNUM) * 8);
+ if (regno >= NS32K_LP0_REGNUM)
+ return (NS32K_LP0_REGNUM * 4) + ((regno - NS32K_LP0_REGNUM) * 8);
return (regno * 4);
}
-int
+static int
ns32k_register_byte_32382 (int regno)
{
/* This is a bit yuk. The even numbered double precision floating
registers are at the end. Doing it this way is compatible for both
32081 and 32381 equipped machines. */
- return ((regno < LP0_REGNUM ? regno
- : (regno - LP0_REGNUM) & 1 ? regno - 1
- : (regno - LP0_REGNUM + FP0_REGNUM)) * 4);
+ return ((regno < NS32K_LP0_REGNUM ? regno
+ : (regno - NS32K_LP0_REGNUM) & 1 ? regno - 1
+ : (regno - NS32K_LP0_REGNUM + FP0_REGNUM)) * 4);
}
-int
+static int
ns32k_register_raw_size (int regno)
{
/* All registers are 4 bytes, except for the doubled floating
registers. */
- return ((regno >= LP0_REGNUM) ? 8 : 4);
+ return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
}
-int
+static int
ns32k_register_virtual_size (int regno)
{
- return ((regno >= LP0_REGNUM) ? 8 : 4);
+ return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
}
-struct type *
+static struct type *
ns32k_register_virtual_type (int regno)
{
if (regno < FP0_REGNUM)
if (regno < FP0_REGNUM + 8)
return (builtin_type_float);
- if (regno < LP0_REGNUM)
+ if (regno < NS32K_LP0_REGNUM)
return (builtin_type_int);
return (builtin_type_double);
}
+/* Immediately after a function call, return the saved PC. Can't
+ always go through the frames for this because on some systems,
+ the new frame is not set up until the new function executes some
+ instructions. */
+
+static CORE_ADDR
+ns32k_saved_pc_after_call (struct frame_info *frame)
+{
+ return (read_memory_integer (read_register (SP_REGNUM), 4));
+}
+
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
-CORE_ADDR
+static CORE_ADDR
umax_skip_prologue (CORE_ADDR pc)
{
register unsigned char op = read_memory_integer (pc, 1);
return pc;
}
\f
-const unsigned char *
+static const unsigned char *
ns32k_breakpoint_from_pc (CORE_ADDR *pcp, int *lenp)
{
static const unsigned char breakpoint_insn[] = { 0xf2 };
so this will often not work properly. If the arg names
are known, it's likely most of them will be printed. */
-int
+static int
umax_frame_num_args (struct frame_info *fi)
{
int numargs;
: value);
}
-void
+static void
flip_bytes (void *p, int count)
{
char tmp;
return enter_addr; /* pc is between enter and exit */
}
-CORE_ADDR
+static CORE_ADDR
ns32k_frame_chain (struct frame_info *frame)
{
/* In the case of the NS32000 series, the frame's nominal address is the
return (read_memory_integer (frame->frame, 4));
}
-CORE_ADDR
+static CORE_ADDR
ns32k_frame_saved_pc (struct frame_info *frame)
{
if (frame->signal_handler_caller)
return (read_memory_integer (frame->frame + 4, 4));
}
-CORE_ADDR
+static CORE_ADDR
ns32k_frame_args_address (struct frame_info *frame)
{
if (ns32k_get_enter_addr (frame->pc) > 1)
return (read_register (SP_REGNUM) - 4);
}
-CORE_ADDR
+static CORE_ADDR
ns32k_frame_locals_address (struct frame_info *frame)
{
return (frame->frame);
special ways in the stack frame. sp is even more special: the address we
return for it IS the sp for the next frame. */
-void
+static void
ns32k_frame_init_saved_regs (struct frame_info *frame)
{
int regmask, regnum;
}
}
-void
+static void
ns32k_push_dummy_frame (void)
{
CORE_ADDR sp = read_register (SP_REGNUM);
write_register (SP_REGNUM, sp);
}
-void
+static void
ns32k_pop_frame (void)
{
struct frame_info *frame = get_current_frame ();
write_register (SP_REGNUM, fp + 8);
flush_cached_frames ();
}
+\f
+/* The NS32000 call dummy sequence:
+
+ enter 0xff,0 82 ff 00
+ jsr @0x00010203 7f ae c0 01 02 03
+ adjspd 0x69696969 7f a5 01 02 03 04
+ bpt f2
+
+ It is 16 bytes long. */
+
+static LONGEST ns32k_call_dummy_words[] =
+{
+ 0x7f00ff82,
+ 0x0201c0ae,
+ 0x01a57f03,
+ 0xf2040302
+};
+static int sizeof_ns32k_call_dummy_words = sizeof (ns32k_call_dummy_words);
+
+#define NS32K_CALL_DUMMY_ADDR 5
+#define NS32K_CALL_DUMMY_NARGS 11
+
+static void
+ns32k_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
+ struct value **args, struct type *type, int gcc_p)
+{
+ int flipped;
+
+ flipped = fun | 0xc0000000;
+ flip_bytes (&flipped, 4);
+ store_unsigned_integer (dummy + NS32K_CALL_DUMMY_ADDR, 4, flipped);
+
+ flipped = - nargs * 4;
+ flip_bytes (&flipped, 4);
+ store_unsigned_integer (dummy + NS32K_CALL_DUMMY_NARGS, 4, flipped);
+}
+\f
+static void
+ns32k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+{
+ /* On this machine, this is a no-op (Encore Umax didn't use GCC). */
+}
+
+static void
+ns32k_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
+{
+ memcpy (valbuf,
+ regbuf + REGISTER_BYTE (TYPE_CODE (valtype) == TYPE_CODE_FLT ?
+ FP0_REGNUM : 0), TYPE_LENGTH (valtype));
+}
+
+static void
+ns32k_store_return_value (struct type *valtype, char *valbuf)
+{
+ deprecated_write_register_bytes (TYPE_CODE (valtype) == TYPE_CODE_FLT
+ ? FP0_REGNUM : 0, valbuf,
+ TYPE_LENGTH (valtype));
+}
+
+static CORE_ADDR
+ns32k_extract_struct_value_address (char *regbuf)
+{
+ return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0)));
+}
+\f
+void
+ns32k_gdbarch_init_32082 (struct gdbarch *gdbarch)
+{
+ set_gdbarch_num_regs (gdbarch, NS32K_NUM_REGS_32082);
+
+ set_gdbarch_register_name (gdbarch, ns32k_register_name_32082);
+ set_gdbarch_register_bytes (gdbarch, NS32K_REGISTER_BYTES_32082);
+ set_gdbarch_register_byte (gdbarch, ns32k_register_byte_32082);
+}
+
+void
+ns32k_gdbarch_init_32382 (struct gdbarch *gdbarch)
+{
+ set_gdbarch_num_regs (gdbarch, NS32K_NUM_REGS_32382);
+
+ set_gdbarch_register_name (gdbarch, ns32k_register_name_32382);
+ set_gdbarch_register_bytes (gdbarch, NS32K_REGISTER_BYTES_32382);
+ set_gdbarch_register_byte (gdbarch, ns32k_register_byte_32382);
+}
+
+/* Initialize the current architecture based on INFO. If possible, re-use an
+ architecture from ARCHES, which is a list of architectures already created
+ during this debugging session.
+
+ Called e.g. at program startup, when reading a core file, and when reading
+ a binary file. */
+
+static struct gdbarch *
+ns32k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch_tdep *tdep;
+ struct gdbarch *gdbarch;
+ enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
+
+ /* Try to determine the OS ABI of the object we are loading. */
+ if (info.abfd != NULL)
+ {
+ osabi = gdbarch_lookup_osabi (info.abfd);
+ }
+
+ /* Find a candidate among extant architectures. */
+ for (arches = gdbarch_list_lookup_by_info (arches, &info);
+ arches != NULL;
+ arches = gdbarch_list_lookup_by_info (arches->next, &info))
+ {
+ /* Make sure the OS ABI selection matches. */
+ tdep = gdbarch_tdep (arches->gdbarch);
+ if (tdep && tdep->osabi == osabi)
+ return arches->gdbarch;
+ }
+
+ tdep = xmalloc (sizeof (struct gdbarch_tdep));
+ gdbarch = gdbarch_alloc (&info, tdep);
+
+ tdep->osabi = osabi;
+
+ /* Register info */
+ ns32k_gdbarch_init_32082 (gdbarch);
+ set_gdbarch_num_regs (gdbarch, NS32K_SP_REGNUM);
+ set_gdbarch_num_regs (gdbarch, NS32K_FP_REGNUM);
+ set_gdbarch_num_regs (gdbarch, NS32K_PC_REGNUM);
+ set_gdbarch_num_regs (gdbarch, NS32K_PS_REGNUM);
+
+ set_gdbarch_register_size (gdbarch, NS32K_REGISTER_SIZE);
+ set_gdbarch_register_raw_size (gdbarch, ns32k_register_raw_size);
+ set_gdbarch_max_register_raw_size (gdbarch, NS32K_MAX_REGISTER_RAW_SIZE);
+ set_gdbarch_register_virtual_size (gdbarch, ns32k_register_virtual_size);
+ set_gdbarch_max_register_virtual_size (gdbarch,
+ NS32K_MAX_REGISTER_VIRTUAL_SIZE);
+ set_gdbarch_register_virtual_type (gdbarch, ns32k_register_virtual_type);
+
+ /* Frame and stack info */
+ set_gdbarch_skip_prologue (gdbarch, umax_skip_prologue);
+ set_gdbarch_saved_pc_after_call (gdbarch, ns32k_saved_pc_after_call);
+
+ set_gdbarch_frame_num_args (gdbarch, umax_frame_num_args);
+ set_gdbarch_frameless_function_invocation (gdbarch,
+ generic_frameless_function_invocation_not);
+
+ set_gdbarch_frame_chain (gdbarch, ns32k_frame_chain);
+ set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid);
+ set_gdbarch_frame_saved_pc (gdbarch, ns32k_frame_saved_pc);
+
+ set_gdbarch_frame_args_address (gdbarch, ns32k_frame_args_address);
+ set_gdbarch_frame_locals_address (gdbarch, ns32k_frame_locals_address);
+
+ set_gdbarch_frame_init_saved_regs (gdbarch, ns32k_frame_init_saved_regs);
+
+ set_gdbarch_frame_args_skip (gdbarch, 8);
+
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+
+ /* Return value info */
+ set_gdbarch_store_struct_return (gdbarch, ns32k_store_struct_return);
+ set_gdbarch_deprecated_extract_return_value (gdbarch, ns32k_extract_return_value);
+ set_gdbarch_deprecated_store_return_value (gdbarch, ns32k_store_return_value);
+ set_gdbarch_deprecated_extract_struct_value_address (gdbarch,
+ ns32k_extract_struct_value_address);
+
+ /* Call dummy info */
+ set_gdbarch_push_dummy_frame (gdbarch, ns32k_push_dummy_frame);
+ set_gdbarch_pop_frame (gdbarch, ns32k_pop_frame);
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+ set_gdbarch_call_dummy_p (gdbarch, 1);
+ set_gdbarch_call_dummy_words (gdbarch, ns32k_call_dummy_words);
+ set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof_ns32k_call_dummy_words);
+ set_gdbarch_fix_call_dummy (gdbarch, ns32k_fix_call_dummy);
+ set_gdbarch_call_dummy_start_offset (gdbarch, 3);
+ set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 0);
+ set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
+ set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack);
+ set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
+
+ /* Breakpoint info */
+ set_gdbarch_decr_pc_after_break (gdbarch, 0);
+ set_gdbarch_breakpoint_from_pc (gdbarch, ns32k_breakpoint_from_pc);
+
+ /* Misc info */
+ set_gdbarch_function_start_offset (gdbarch, 0);
+
+ /* Hook in OS ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch, osabi);
+
+ return (gdbarch);
+}
+
+static void
+ns32k_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ if (tdep == NULL)
+ return;
+
+ fprintf_unfiltered (file, "ns32k_dump_tdep: OS ABI = %s\n",
+ gdbarch_osabi_name (tdep->osabi));
+}
void
_initialize_ns32k_tdep (void)
{
+ gdbarch_register (bfd_arch_ns32k, ns32k_gdbarch_init, ns32k_dump_tdep);
+
tm_print_insn = print_insn_ns32k;
}
projects / deliverable / binutils-gdb.git / blobdiff