-/* Target-machine dependent code for Hitachi Super-H, for GDB.
- Copyright (C) 1993 Free Software Foundation, Inc.
+/* Target-dependent code for Hitachi Super-H, for GDB.
+ Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
Contributed by Steve Chamberlain
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
+#include "gdbcore.h"
#include "value.h"
#include "dis-asm.h"
-#include "../opcodes/sh-opc.h"
-
-
-
/* Prologue looks like
[mov.l <regs>,@-r15]...
#define GET_PUSHED_REG(x) (((x) >> 4) & 0xf)
#define IS_MOV_SP_FP(x) ((x) == 0x6ef3)
#define IS_ADD_SP(x) (((x) & 0xff00) == 0x7f00)
-
+#define IS_MOV_R3(x) (((x) & 0xff00) == 0x1a00)
+#define IS_SHLL_R3(x) ((x) == 0x4300)
+#define IS_ADD_R3SP(x) ((x) == 0x3f3c)
/* Skip any prologue before the guts of a function */
CORE_ADDR
sh_skip_prologue (start_pc)
CORE_ADDR start_pc;
-
{
int w;
w = read_memory_integer (start_pc, 2);
while (IS_STS (w)
|| IS_PUSH (w)
- || IS_MOV_SP_FP (w))
+ || IS_MOV_SP_FP (w)
+ || IS_MOV_R3 (w)
+ || IS_ADD_R3SP (w)
+ || IS_ADD_SP (w)
+ || IS_SHLL_R3 (w))
{
start_pc += 2;
w = read_memory_integer (start_pc, 2);
return start_pc;
}
-/* Disassemble an instruction */
+/* Disassemble an instruction. */
int
-print_insn (memaddr, stream)
- CORE_ADDR memaddr;
- FILE *stream;
+gdb_print_insn_sh (memaddr, info)
+ bfd_vma memaddr;
+ disassemble_info *info;
{
- disassemble_info info;
- GDB_INIT_DISASSEMBLE_INFO (info, stream);
- return print_insn_sh (memaddr, &info);
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ return print_insn_sh (memaddr, info);
+ else
+ return print_insn_shl (memaddr, info);
}
/* Given a GDB frame, determine the address of the calling function's frame.
For us, the frame address is its stack pointer value, so we look up
the function prologue to determine the caller's sp value, and return it. */
-FRAME_ADDR
-sh_frame_chain (thisframe)
- FRAME thisframe;
+CORE_ADDR
+sh_frame_chain (frame)
+ struct frame_info *frame;
{
- if (!inside_entry_file (thisframe->pc))
- return (read_memory_integer (FRAME_FP (thisframe), 4));
+ if (!inside_entry_file (frame->pc))
+ return read_memory_integer (FRAME_FP (frame) + frame->f_offset, 4);
else
return 0;
}
-/* Put here the code to store, into a struct frame_saved_regs,
- the addresses of the saved registers of frame described by FRAME_INFO.
+/* 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
- ways in the stack frame. sp is even more special:
- the address we return for it IS the sp for the next frame. */
-
+ ways in the stack frame. sp is even more special: the address we
+ return for it IS the sp for the next frame. */
void
frame_find_saved_regs (fi, fsr)
int pc;
int opc;
int insn;
+ int r3_val = 0;
opc = pc = get_pc_function_start (fi->pc);
insn = read_memory_integer (pc, 2);
+ fi->leaf_function = 1;
+ fi->f_offset = 0;
+
for (rn = 0; rn < NUM_REGS; rn++)
where[rn] = -1;
pc += 2;
where[PR_REGNUM] = depth;
insn = read_memory_integer (pc, 2);
+ /* If we're storing the pr then this isn't a leaf */
+ fi->leaf_function = 0;
depth += 4;
}
+ else if (IS_MOV_R3 (insn))
+ {
+ r3_val = (char) (insn & 0xff);
+ pc += 2;
+ insn = read_memory_integer (pc, 2);
+ }
+ else if (IS_SHLL_R3 (insn))
+ {
+ r3_val <<= 1;
+ pc += 2;
+ insn = read_memory_integer (pc, 2);
+ }
+ else if (IS_ADD_R3SP (insn))
+ {
+ depth += -r3_val;
+ pc += 2;
+ insn = read_memory_integer (pc, 2);
+ }
else if (IS_ADD_SP (insn))
{
pc += 2;
fsr->regs[SP_REGNUM] = fi->frame - 4;
}
-
+ fi->f_offset = depth - where[FP_REGNUM] - 4;
/* Work out the return pc - either from the saved pr or the pr
value */
if (fsr->regs[PR_REGNUM])
- {
- fi->return_pc = read_memory_integer (fsr->regs[PR_REGNUM], 4) + 4;
- }
+ fi->return_pc = read_memory_integer (fsr->regs[PR_REGNUM], 4);
else
- {
- fi->return_pc = read_register (PR_REGNUM) + 4;
- }
+ fi->return_pc = read_register (PR_REGNUM);
}
/* initialize the extra info saved in a FRAME */
struct frame_info *fi;
{
struct frame_saved_regs dummy;
+
+ if (fi->next)
+ fi->pc = fi->next->return_pc;
+
frame_find_saved_regs (fi, &dummy);
}
void
pop_frame ()
{
- register FRAME frame = get_current_frame ();
+ register struct frame_info *frame = get_current_frame ();
register CORE_ADDR fp;
register int regnum;
struct frame_saved_regs fsr;
- struct frame_info *fi;
- fi = get_frame_info (frame);
- fp = fi->frame;
- get_frame_saved_regs (fi, &fsr);
+ fp = FRAME_FP (frame);
+ get_frame_saved_regs (frame, &fsr);
/* Copy regs from where they were saved in the frame */
for (regnum = 0; regnum < NUM_REGS; regnum++)
}
}
- write_register (PC_REGNUM, fi->return_pc);
+ write_register (PC_REGNUM, frame->return_pc);
write_register (SP_REGNUM, fp + 4);
flush_cached_frames ();
- set_current_frame (create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
}
+/* Print the registers in a form similar to the E7000 */
+static void
+show_regs (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ printf_filtered ("PC=%08x SR=%08x PR=%08x MACH=%08x MACHL=%08x\n",
+ read_register (PC_REGNUM),
+ read_register (SR_REGNUM),
+ read_register (PR_REGNUM),
+ read_register (MACH_REGNUM),
+ read_register (MACL_REGNUM));
+
+ printf_filtered ("R0-R7 %08x %08x %08x %08x %08x %08x %08x %08x\n",
+ read_register (0),
+ read_register (1),
+ read_register (2),
+ read_register (3),
+ read_register (4),
+ read_register (5),
+ read_register (6),
+ read_register (7));
+ printf_filtered ("R8-R15 %08x %08x %08x %08x %08x %08x %08x %08x\n",
+ read_register (8),
+ read_register (9),
+ read_register (10),
+ read_register (11),
+ read_register (12),
+ read_register (13),
+ read_register (14),
+ read_register (15));
+}
+\f
+void
_initialize_sh_tdep ()
{
- extern int sim_memory_size;
- /* FIXME, there should be a way to make a CORE_ADDR variable settable. */
- add_show_from_set
- (add_set_cmd ("memory_size", class_support, var_uinteger,
- (char *) &sim_memory_size,
- "Set simulated memory size of simulator target.", &setlist),
- &showlist);
+ tm_print_insn = gdb_print_insn_sh;
+
+ add_com ("regs", class_vars, show_regs, "Print all registers");
}
projects / binutils-gdb.git / blobdiff