along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/*
+/*
Contributed by Steve Chamberlain
- sac@cygnus.com
+ sac@cygnus.com
*/
-#include <stdio.h>
#include "defs.h"
#include "frame.h"
#include "obstack.h"
#include "symtab.h"
+#include <dis-asm.h>
+#include "gdbcmd.h"
+#include "gdbtypes.h"
+
+#undef NUM_REGS
+#define NUM_REGS 11
+
#define UNSIGNED_SHORT(X) ((X) & 0xffff)
/* an easy to debug H8 stack frame looks like:
-0x6df2 push r2
-0x6df3 push r3
-0x6df6 push r6
-0x mov.w r7,r6
- subs stuff,sp mov.w #x,r5
- subs r5,sp
+0x6df6 push r6
+0x0d76 mov.w r7,r6
+0x6dfn push reg
+0x7905 nnnn mov.w #n,r5 or 0x1b87 subs #2,sp
+0x1957 sub.w r5,sp
*/
#define IS_PUSH(x) ((x & 0xff00)==0x6d00)
+#define IS_PUSH_FP(x) (x == 0x6df6)
#define IS_MOVE_FP(x) (x == 0x0d76)
#define IS_MOV_SP_FP(x) (x == 0x0d76)
#define IS_SUB2_SP(x) (x==0x1b87)
#define IS_MOVK_R5(x) (x==0x7905)
-CORE_ADDR examine_prologue();
+#define IS_SUB_R5SP(x) (x==0x1957)
-void frame_find_saved_regs ();
-CORE_ADDR h8300_skip_prologue(start_pc)
-CORE_ADDR start_pc;
+static CORE_ADDR examine_prologue ();
+void frame_find_saved_regs ();
+CORE_ADDR
+h8300_skip_prologue (start_pc)
+ CORE_ADDR start_pc;
{
+ short int w;
+ w = read_memory_unsigned_integer (start_pc, 2);
/* Skip past all push insns */
- short int w;
-
- w = read_memory_short(start_pc);
- while (IS_PUSH(w))
- {
- start_pc+=2;
- w = read_memory_short(start_pc);
- }
+ while (IS_PUSH_FP (w))
+ {
+ start_pc += 2;
+ w = read_memory_unsigned_integer (start_pc, 2);
+ }
/* Skip past a move to FP */
- if (IS_MOVE_FP(w)) {
- start_pc +=2 ;
- w = read_memory_short(start_pc);
+ if (IS_MOVE_FP (w))
+ {
+ start_pc += 2;
+ w = read_memory_unsigned_integer (start_pc, 2);
}
- return start_pc;
-
-}
+ /* Skip the stack adjust */
+
+ if (IS_MOVK_R5 (w))
+ {
+ start_pc += 2;
+ w = read_memory_unsigned_integer (start_pc, 2);
+ }
+ if (IS_SUB_R5SP (w))
+ {
+ start_pc += 2;
+ w = read_memory_unsigned_integer (start_pc, 2);
+ }
+ while (IS_SUB2_SP (w))
+ {
+ start_pc += 2;
+ w = read_memory_unsigned_integer (start_pc, 2);
+ }
+ return start_pc;
+}
int
-print_insn(memaddr, stream)
-CORE_ADDR memaddr;
-FILE *stream;
+print_insn (memaddr, stream)
+ CORE_ADDR memaddr;
+ GDB_FILE *stream;
{
- /* Nothing is bigger than 8 bytes */
- char data[8];
- read_memory (memaddr, data, sizeof(data));
- return print_insn_h8300(memaddr, data, stream);
+ disassemble_info info;
+ GDB_INIT_DISASSEMBLE_INFO(info, stream);
+ if (h8300hmode)
+ return print_insn_h8300h (memaddr, &info);
+ else
+ return print_insn_h8300 (memaddr, &info);
}
-
-
+
/* Given a GDB frame, determine the address of the calling function's frame.
This will be used to create a new GDB frame struct, and then
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
FRAME_CHAIN (thisframe)
FRAME thisframe;
{
-
frame_find_saved_regs (thisframe, (struct frame_saved_regs *) 0);
- return thisframe->fsr->regs[SP_REGNUM];
+ return thisframe->fsr->regs[SP_REGNUM];
}
-
-
/* Put here the code to store, into a struct frame_saved_regs,
the addresses of the saved registers of frame described by FRAME_INFO.
This includes special registers such as pc and fp saved in special
if (!fi->fsr)
{
cache_fsr = (struct frame_saved_regs *)
- obstack_alloc (&frame_cache_obstack,
- sizeof (struct frame_saved_regs));
- bzero (cache_fsr, sizeof (struct frame_saved_regs));
+ obstack_alloc (&frame_cache_obstack,
+ sizeof (struct frame_saved_regs));
+ memset (cache_fsr, '\0', sizeof (struct frame_saved_regs));
+
fi->fsr = cache_fsr;
/* Find the start and end of the function prologue. If the PC
is in the function prologue, we only consider the part that
has executed already. */
-
+
ip = get_pc_function_start (fi->pc);
sal = find_pc_line (ip, 0);
- limit = (sal.end && sal.end < fi->pc) ? sal.end: fi->pc;
+ limit = (sal.end && sal.end < fi->pc) ? sal.end : fi->pc;
/* This will fill in fields in *fi as well as in cache_fsr. */
examine_prologue (ip, limit, fi->frame, cache_fsr, fi);
if (fsr)
*fsr = *fi->fsr;
}
-
/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or
is not the address of a valid instruction, the address of the next
instruction beyond ADDR otherwise. *PWORD1 receives the first word
of the instruction.*/
-
CORE_ADDR
-NEXT_PROLOGUE_INSN(addr, lim, pword1)
-CORE_ADDR addr;
-CORE_ADDR lim;
-short *pword1;
+NEXT_PROLOGUE_INSN (addr, lim, pword1)
+ CORE_ADDR addr;
+ CORE_ADDR lim;
+ INSN_WORD *pword1;
{
- if (addr < lim+8)
- {
- read_memory (addr, pword1, sizeof(*pword1));
- SWAP_TARGET_AND_HOST (pword1, sizeof (short));
- return addr + 2;
- }
+ char buf[2];
+ if (addr < lim + 8)
+ {
+ read_memory (addr, buf, 2);
+ *pword1 = extract_signed_integer (buf, 2);
+ return addr + 2;
+ }
return 0;
-
}
/* Examine the prologue of a function. `ip' points to the first instruction.
- `limit' is the limit of the prologue (e.g. the addr of the first
+ `limit' is the limit of the prologue (e.g. the addr of the first
linenumber, or perhaps the program counter if we're stepping through).
- `frame_sp' is the stack pointer value in use in this frame.
+ `frame_sp' is the stack pointer value in use in this frame.
`fsr' is a pointer to a frame_saved_regs structure into which we put
- info about the registers saved by this frame.
+ info about the registers saved by this frame.
`fi' is a struct frame_info pointer; we fill in various fields in it
to reflect the offsets of the arg pointer and the locals pointer. */
-/* We will find two sorts of prologue, framefull and non framefull:
-
- push r2
- push r3
- push fp
- mov sp,fp
- stack_ad
-
- and
- push x
- push y
- stack_ad
-
-*/
-
static CORE_ADDR
examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
register CORE_ADDR ip;
int r;
int i;
int have_fp = 0;
-
register int src;
register struct pic_prologue_code *pcode;
INSN_WORD insn_word;
int size, offset;
- unsigned int reg_save_depth = 2; /* Number of things pushed onto
- stack, starts at 2, 'cause the
- PC is already there */
+ /* Number of things pushed onto stack, starts at 2/4, 'cause the
+ PC is already there */
+ unsigned int reg_save_depth = h8300hmode ? 4 : 2;
unsigned int auto_depth = 0; /* Number of bytes of autos */
-
- char in_frame[NUM_REGS]; /* One for each reg */
-
- memset(in_frame, 1, NUM_REGS);
-
- if (after_prolog_fp == 0) {
- after_prolog_fp = read_register(SP_REGNUM);
- }
- if (ip == 0 || ip & ~0xffff) return 0;
- next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ char in_frame[11]; /* One for each reg */
- /* Skip over any push instructions, and remember where they were saved */
+ memset (in_frame, 1, 11);
+ for (r = 0; r < 8; r++)
+ {
+ fsr->regs[r] = 0;
+ }
+ if (after_prolog_fp == 0)
+ {
+ after_prolog_fp = read_register (SP_REGNUM);
+ }
+ if (ip == 0 || ip & (h8300hmode ? ~0xffff : ~0xffff))
+ return 0;
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
- while (next_ip && IS_PUSH(insn_word))
- {
- ip = next_ip;
- in_frame[insn_word & 0x7] = reg_save_depth;
- next_ip = NEXT_PROLOGUE_INSN(ip, limit, &insn_word);
- reg_save_depth +=2;
+ /* Skip over any fp push instructions */
+ fsr->regs[6] = after_prolog_fp;
+ while (next_ip && IS_PUSH_FP (insn_word))
+ {
+ ip = next_ip;
- }
-
+ in_frame[insn_word & 0x7] = reg_save_depth;
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ reg_save_depth += 2;
+ }
/* Is this a move into the fp */
- if (next_ip && IS_MOV_SP_FP(insn_word))
- {
- ip = next_ip;
- next_ip = NEXT_PROLOGUE_INSN(ip, limit, &insn_word);
- have_fp = 1;
-
- }
-
+ if (next_ip && IS_MOV_SP_FP (insn_word))
+ {
+ ip = next_ip;
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ have_fp = 1;
+ }
/* Skip over any stack adjustment, happens either with a number of
sub#2,sp or a mov #x,r5 sub r5,sp */
-
- if (next_ip && IS_SUB2_SP(insn_word))
- {
- while (next_ip && IS_SUB2_SP(insn_word))
+ if (next_ip && IS_SUB2_SP (insn_word))
{
- auto_depth +=2 ;
- ip = next_ip;
- next_ip = NEXT_PROLOGUE_INSN(ip, limit, &insn_word);
+ while (next_ip && IS_SUB2_SP (insn_word))
+ {
+ auto_depth += 2;
+ ip = next_ip;
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ }
+ }
+ else
+ {
+ if (next_ip && IS_MOVK_R5 (insn_word))
+ {
+ ip = next_ip;
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ auto_depth += insn_word;
+
+ next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn_word);
+ auto_depth += insn_word;
+ }
}
- }
- else
- {
- if (next_ip && IS_MOVK_R5(insn_word))
+ /* Work out which regs are stored where */
+ while (next_ip && IS_PUSH (insn_word))
{
ip = next_ip;
- next_ip = NEXT_PROLOGUE_INSN(ip, limit, &insn_word);
- auto_depth += insn_word;
- ip +=4;
-
+ next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
+ fsr->regs[r] = after_prolog_fp + auto_depth;
+ auto_depth += 2;
}
- }
-
-
/* The args are always reffed based from the stack pointer */
- fi->args_pointer = after_prolog_fp - auto_depth;
+ fi->args_pointer = after_prolog_fp;
/* Locals are always reffed based from the fp */
- fi->locals_pointer = after_prolog_fp ;
+ fi->locals_pointer = after_prolog_fp;
/* The PC is at a known place */
- fi->from_pc = read_memory_short(after_prolog_fp + reg_save_depth-2 );
-
+ fi->from_pc = read_memory_unsigned_integer (after_prolog_fp + 2, BINWORD);
/* Rememeber any others too */
-
in_frame[PC_REGNUM] = 0;
-
- for (r = 0; r < NUM_REGS; r++)
- {
- if (in_frame[r] != 1)
- {
- fsr->regs[r] = after_prolog_fp + reg_save_depth - in_frame[r] -2;
- }
- else
- {
- fsr->regs[r] = 0;
- }
- }
- if (have_fp)
- /* We keep the old FP in the SP spot */
- fsr->regs[SP_REGNUM] = (read_memory_short(fsr->regs[6])) ;
- else
- fsr->regs[SP_REGNUM] = after_prolog_fp + reg_save_depth;
-
+
+ if (have_fp)
+ /* We keep the old FP in the SP spot */
+ fsr->regs[SP_REGNUM] = read_memory_unsigned_integer (fsr->regs[6], BINWORD);
+ else
+ fsr->regs[SP_REGNUM] = after_prolog_fp + auto_depth;
+
return (ip);
}
fi->args_pointer = 0; /* Unknown */
fi->locals_pointer = 0; /* Unknown */
fi->from_pc = 0;
-
}
+
/* Return the saved PC from this frame.
If the frame has a memory copy of SRP_REGNUM, use that. If not,
CORE_ADDR
frame_saved_pc (frame)
-FRAME frame;
-
+ FRAME frame;
{
return frame->from_pc;
}
-
CORE_ADDR
frame_locals_address (fi)
struct frame_info *fi;
{
- if (!fi->locals_pointer)
- {
- struct frame_saved_regs ignore;
- get_frame_saved_regs(fi, &ignore);
+ if (!fi->locals_pointer)
+ {
+ struct frame_saved_regs ignore;
- }
+ get_frame_saved_regs (fi, &ignore);
+
+ }
return fi->locals_pointer;
}
frame_args_address (fi)
struct frame_info *fi;
{
- if (!fi->args_pointer)
- {
- struct frame_saved_regs ignore;
- get_frame_saved_regs(fi, &ignore);
+ if (!fi->args_pointer)
+ {
+ struct frame_saved_regs ignore;
+
+ get_frame_saved_regs (fi, &ignore);
+
+ }
- }
-
return fi->args_pointer;
}
-
-void h8300_pop_frame()
+void
+h8300_pop_frame ()
{
unsigned regnum;
struct frame_saved_regs fsr;
struct frame_info *fi;
- FRAME frame = get_current_frame();
- fi = get_frame_info(frame);
- get_frame_saved_regs(fi, &fsr);
+ FRAME frame = get_current_frame ();
+
+ fi = get_frame_info (frame);
+ get_frame_saved_regs (fi, &fsr);
- for (regnum = 0; regnum < NUM_REGS; regnum ++)
- {
- if(fsr.regs[regnum])
+ for (regnum = 0; regnum < 8; regnum++)
{
- write_register(regnum, read_memory_short (fsr.regs[regnum]));
+ if (fsr.regs[regnum])
+ {
+ write_register (regnum, read_memory_integer(fsr.regs[regnum]), BINWORD);
+ }
+
+ flush_cached_frames ();
+ set_current_frame (create_new_frame (read_register (FP_REGNUM),
+ read_pc ()));
}
-
- flush_cached_frames();
- set_current_frame(create_new_frame(read_register(FP_REGNUM),
- read_pc()));
-
- }
+}
+
+
+struct cmd_list_element *setmemorylist;
+static void
+h8300_command(args, from_tty)
+{
+ extern int h8300hmode;
+ h8300hmode = 0;
+}
+
+static void
+h8300h_command(args, from_tty)
+{
+ extern int h8300hmode;
+ h8300hmode = 1;
+}
+
+static void
+set_machine (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ printf_unfiltered ("\"set machine\" must be followed by h8300 or h8300h.\n");
+ help_list (setmemorylist, "set memory ", -1, gdb_stdout);
+}
+
+void
+_initialize_h8300m ()
+{
+ add_prefix_cmd ("machine", no_class, set_machine,
+ "set the machine type", &setmemorylist, "set machine ", 0,
+ &setlist);
+
+ add_cmd ("h8300", class_support, h8300_command,
+ "Set machine to be H8/300.", &setmemorylist);
+
+ add_cmd ("h8300h", class_support, h8300h_command,
+ "Set machine to be H8/300H.", &setmemorylist);
}
+
+
+
+void
+print_register_hook (regno)
+{
+ if (regno == 8)
+ {
+ /* CCR register */
+ int C, Z, N, V;
+ unsigned char b[4];
+ unsigned char l;
+ read_relative_register_raw_bytes (regno, b);
+ l = b[REGISTER_VIRTUAL_SIZE(8) -1];
+ printf_unfiltered ("\t");
+ printf_unfiltered ("I-%d - ", (l & 0x80) != 0);
+ printf_unfiltered ("H-%d - ", (l & 0x20) != 0);
+ N = (l & 0x8) != 0;
+ Z = (l & 0x4) != 0;
+ V = (l & 0x2) != 0;
+ C = (l & 0x1) != 0;
+ printf_unfiltered ("N-%d ", N);
+ printf_unfiltered ("Z-%d ", Z);
+ printf_unfiltered ("V-%d ", V);
+ printf_unfiltered ("C-%d ", C);
+ if ((C | Z) == 0)
+ printf_unfiltered ("u> ");
+ if ((C | Z) == 1)
+ printf_unfiltered ("u<= ");
+ if ((C == 0))
+ printf_unfiltered ("u>= ");
+ if (C == 1)
+ printf_unfiltered ("u< ");
+ if (Z == 0)
+ printf_unfiltered ("!= ");
+ if (Z == 1)
+ printf_unfiltered ("== ");
+ if ((N ^ V) == 0)
+ printf_unfiltered (">= ");
+ if ((N ^ V) == 1)
+ printf_unfiltered ("< ");
+ if ((Z | (N ^ V)) == 0)
+ printf_unfiltered ("> ");
+ if ((Z | (N ^ V)) == 1)
+ printf_unfiltered ("<= ");
+ }
+}
+
projects / deliverable / binutils-gdb.git / blobdiff