#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);
static const char *
ns32k_register_name_32082 (int regno)
{
static char *register_names[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
"sp", "fp", "pc", "ps",
"l0", "l1", "l2", "l3", "xx",
};
if (regno < 0)
return NULL;
if (regno >= sizeof (register_names) / sizeof (*register_names))
return NULL;
return (register_names[regno]);
}
static const char *
ns32k_register_name_32382 (int regno)
{
static char *register_names[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
"sp", "fp", "pc", "ps",
"fsr",
"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", "xx",
};
if (regno < 0)
return NULL;
if (regno >= sizeof (register_names) / sizeof (*register_names))
return NULL;
return (register_names[regno]);
}
static int
ns32k_register_byte_32082 (int regno)
{
if (regno >= NS32K_LP0_REGNUM)
return (NS32K_LP0_REGNUM * 4) + ((regno - NS32K_LP0_REGNUM) * 8);
return (regno * 4);
}
static int
ns32k_register_byte_32382 (int regno)
{
return ((regno < NS32K_LP0_REGNUM ? regno
: (regno - NS32K_LP0_REGNUM) & 1 ? regno - 1
: (regno - NS32K_LP0_REGNUM + FP0_REGNUM)) * 4);
}
static int
ns32k_register_raw_size (int regno)
{
return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
}
static int
ns32k_register_virtual_size (int regno)
{
return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
}
static struct type *
ns32k_register_virtual_type (int regno)
{
if (regno < FP0_REGNUM)
return (builtin_type_int);
if (regno < FP0_REGNUM + 8)
return (builtin_type_float);
if (regno < NS32K_LP0_REGNUM)
return (builtin_type_int);
return (builtin_type_double);
}
static CORE_ADDR
ns32k_saved_pc_after_call (struct frame_info *frame)
{
return (read_memory_integer (read_register (SP_REGNUM), 4));
}
static CORE_ADDR
umax_skip_prologue (CORE_ADDR pc)
{
register unsigned char op = read_memory_integer (pc, 1);
if (op == 0x82)
{
op = read_memory_integer (pc + 2, 1);
if ((op & 0x80) == 0)
pc += 3;
else if ((op & 0xc0) == 0x80)
pc += 4;
else
pc += 6;
}
return pc;
}
static const unsigned char *
ns32k_breakpoint_from_pc (CORE_ADDR *pcp, int *lenp)
{
static const unsigned char breakpoint_insn[] = { 0xf2 };
*lenp = sizeof (breakpoint_insn);
return breakpoint_insn;
}
static int
umax_frame_num_args (struct frame_info *fi)
{
int numargs;
CORE_ADDR pc;
CORE_ADDR enter_addr;
unsigned int insn;
unsigned int addr_mode;
int width;
numargs = -1;
enter_addr = ns32k_get_enter_addr ((fi)->pc);
if (enter_addr > 0)
{
pc = ((enter_addr == 1)
? SAVED_PC_AFTER_CALL (fi)
: FRAME_SAVED_PC (fi));
insn = read_memory_integer (pc, 2);
addr_mode = (insn >> 11) & 0x1f;
insn = insn & 0x7ff;
if ((insn & 0x7fc) == 0x57c
&& addr_mode == 0x14)
{
if (insn == 0x57c)
width = 1;
else if (insn == 0x57d)
width = 2;
else if (insn == 0x57f)
width = 4;
else
internal_error (__FILE__, __LINE__, "bad else");
numargs = read_memory_integer (pc + 2, width);
if (width > 1)
flip_bytes (&numargs, width);
numargs = -sign_extend (numargs, width * 8) / 4;
}
}
return numargs;
}
static int
sign_extend (int value, int bits)
{
value = value & ((1 << bits) - 1);
return (value & (1 << (bits - 1))
? value | (~((1 << bits) - 1))
: value);
}
static void
flip_bytes (void *p, int count)
{
char tmp;
char *ptr = 0;
while (count > 0)
{
tmp = *ptr;
ptr[0] = ptr[count - 1];
ptr[count - 1] = tmp;
ptr++;
count -= 2;
}
}
static int
ns32k_localcount (CORE_ADDR enter_pc)
{
unsigned char localtype;
int localcount;
localtype = read_memory_integer (enter_pc + 2, 1);
if ((localtype & 0x80) == 0)
localcount = localtype;
else if ((localtype & 0xc0) == 0x80)
localcount = (((localtype & 0x3f) << 8)
| (read_memory_integer (enter_pc + 3, 1) & 0xff));
else
localcount = (((localtype & 0x3f) << 24)
| ((read_memory_integer (enter_pc + 3, 1) & 0xff) << 16)
| ((read_memory_integer (enter_pc + 4, 1) & 0xff) << 8)
| (read_memory_integer (enter_pc + 5, 1) & 0xff));
return localcount;
}
static int
ns32k_about_to_return (CORE_ADDR pc)
{
return (read_memory_integer (pc, 1) == 0x12);
}
static CORE_ADDR
ns32k_get_enter_addr (CORE_ADDR pc)
{
CORE_ADDR enter_addr;
unsigned char op;
if (pc == 0)
return 0;
if (ns32k_about_to_return (pc))
return 1;
enter_addr = get_pc_function_start (pc);
if (pc == enter_addr)
return 1;
op = read_memory_integer (enter_addr, 1);
if (op != 0x82)
return 0;
return enter_addr;
}
static CORE_ADDR
ns32k_frame_chain (struct frame_info *frame)
{
if (inside_entry_file (frame->pc))
return 0;
return (read_memory_integer (frame->frame, 4));
}
static CORE_ADDR
ns32k_frame_saved_pc (struct frame_info *frame)
{
if (frame->signal_handler_caller)
return (sigtramp_saved_pc (frame));
return (read_memory_integer (frame->frame + 4, 4));
}
static CORE_ADDR
ns32k_frame_args_address (struct frame_info *frame)
{
if (ns32k_get_enter_addr (frame->pc) > 1)
return (frame->frame);
return (read_register (SP_REGNUM) - 4);
}
static CORE_ADDR
ns32k_frame_locals_address (struct frame_info *frame)
{
return (frame->frame);
}
static void
ns32k_frame_init_saved_regs (struct frame_info *frame)
{
int regmask, regnum;
int localcount;
CORE_ADDR enter_addr, next_addr;
if (frame->saved_regs)
return;
frame_saved_regs_zalloc (frame);
enter_addr = ns32k_get_enter_addr (frame->pc);
if (enter_addr > 1)
{
regmask = read_memory_integer (enter_addr + 1, 1) & 0xff;
localcount = ns32k_localcount (enter_addr);
next_addr = frame->frame + localcount;
for (regnum = 0; regnum < 8; regnum++)
{
if (regmask & (1 << regnum))
frame->saved_regs[regnum] = next_addr -= 4;
}
frame->saved_regs[SP_REGNUM] = frame->frame + 4;
frame->saved_regs[PC_REGNUM] = frame->frame + 4;
frame->saved_regs[FP_REGNUM] = read_memory_integer (frame->frame, 4);
}
else if (enter_addr == 1)
{
CORE_ADDR sp = read_register (SP_REGNUM);
frame->saved_regs[PC_REGNUM] = sp;
frame->saved_regs[SP_REGNUM] = sp + 4;
}
}
static void
ns32k_push_dummy_frame (void)
{
CORE_ADDR sp = read_register (SP_REGNUM);
int regnum;
sp = push_word (sp, read_register (PC_REGNUM));
sp = push_word (sp, read_register (FP_REGNUM));
write_register (FP_REGNUM, sp);
for (regnum = 0; regnum < 8; regnum++)
sp = push_word (sp, read_register (regnum));
write_register (SP_REGNUM, sp);
}
static void
ns32k_pop_frame (void)
{
struct frame_info *frame = get_current_frame ();
CORE_ADDR fp;
int regnum;
fp = frame->frame;
FRAME_INIT_SAVED_REGS (frame);
for (regnum = 0; regnum < 8; regnum++)
if (frame->saved_regs[regnum])
write_register (regnum,
read_memory_integer (frame->saved_regs[regnum], 4));
write_register (FP_REGNUM, read_memory_integer (fp, 4));
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
write_register (SP_REGNUM, fp + 8);
flush_cached_frames ();
}
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);
}
static void
ns32k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
{
}
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)
{
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)));
}
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);
}
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;
if (info.abfd != NULL)
{
osabi = gdbarch_lookup_osabi (info.abfd);
}
for (arches = gdbarch_list_lookup_by_info (arches, &info);
arches != NULL;
arches = gdbarch_list_lookup_by_info (arches->next, &info))
{
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;
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);
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);
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);
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);
set_gdbarch_decr_pc_after_break (gdbarch, 0);
set_gdbarch_breakpoint_from_pc (gdbarch, ns32k_breakpoint_from_pc);
set_gdbarch_function_start_offset (gdbarch, 0);
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;
}