00dd4fd9ad
* sh-tdep.c (set processor): New command to set specific processor type. (sh_reg_names, sh3_reg_names): Arrays of register names for SH and SH3 processors. (sh_set_processor_type): New function. * sh3-rom.c (sh3_open): Call it. (sh3_regname): Add names of all the bank registers. (sh3_supply_register): Clean up formatting. * config/sh/tm-sh.h (NUM_REGS, NUM_REALREGS): Increase to include bank registers. (REGISTER_NAMES): Add names of bank registers. (FP15_REGNUM): Define. (REGISTER_VIRTUAL_TYPE): Use it. * monitor.c: Clean up some comments.
436 lines
10 KiB
C
436 lines
10 KiB
C
/* Target-dependent code for Hitachi Super-H, for GDB.
|
||
Copyright (C) 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
/*
|
||
Contributed by Steve Chamberlain
|
||
sac@cygnus.com
|
||
*/
|
||
|
||
#include "defs.h"
|
||
#include "frame.h"
|
||
#include "obstack.h"
|
||
#include "symtab.h"
|
||
#include "gdbtypes.h"
|
||
#include "gdbcmd.h"
|
||
#include "gdbcore.h"
|
||
#include "value.h"
|
||
#include "dis-asm.h"
|
||
|
||
/* Default to the original SH. */
|
||
|
||
#define DEFAULT_SH_TYPE "sh"
|
||
|
||
/* This value is the model of SH in use. */
|
||
|
||
char *sh_processor_type;
|
||
|
||
char *tmp_sh_processor_type;
|
||
|
||
/* A set of original names, to be used when restoring back to generic
|
||
registers from a specific set. */
|
||
|
||
char *sh_generic_reg_names[] = REGISTER_NAMES;
|
||
|
||
char *sh_reg_names[] = {
|
||
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
||
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
||
"pc", "pr", "gbr", "vbr", "mach","macl", "sr",
|
||
"fpul", "fpscr",
|
||
"", "", "", "", "", "", "", "",
|
||
"", "", "", "", "", "", "", "",
|
||
"", "", "", "", "", "", "", "",
|
||
"", "", "", "", "", "", "", ""
|
||
};
|
||
|
||
char *sh3_reg_names[] = {
|
||
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
||
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
||
"pc", "pr", "gbr", "vbr", "mach","macl","sr",
|
||
"fpul", "fpscr",
|
||
"fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7",
|
||
"fr8", "fr9", "fr10","fr11","fr12","fr13","fr14","fr15",
|
||
"r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0",
|
||
"r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1"
|
||
};
|
||
|
||
struct {
|
||
char *name;
|
||
char **regnames;
|
||
} sh_processor_type_table[] = {
|
||
{ "sh", sh_reg_names },
|
||
{ "sh3", sh3_reg_names },
|
||
{ NULL, NULL }
|
||
};
|
||
|
||
/* Prologue looks like
|
||
[mov.l <regs>,@-r15]...
|
||
[sts.l pr,@-r15]
|
||
[mov.l r14,@-r15]
|
||
[mov r15,r14]
|
||
*/
|
||
|
||
#define IS_STS(x) ((x) == 0x4f22)
|
||
#define IS_PUSH(x) (((x) & 0xff0f) == 0x2f06)
|
||
#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_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. */
|
||
|
||
int
|
||
gdb_print_insn_sh (memaddr, info)
|
||
bfd_vma memaddr;
|
||
disassemble_info *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.
|
||
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.
|
||
|
||
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. */
|
||
|
||
CORE_ADDR
|
||
sh_frame_chain (frame)
|
||
struct frame_info *frame;
|
||
{
|
||
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.
|
||
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. */
|
||
|
||
void
|
||
frame_find_saved_regs (fi, fsr)
|
||
struct frame_info *fi;
|
||
struct frame_saved_regs *fsr;
|
||
{
|
||
int where[NUM_REGS];
|
||
int rn;
|
||
int have_fp = 0;
|
||
int depth;
|
||
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;
|
||
|
||
depth = 0;
|
||
|
||
/* Loop around examining the prologue insns, but give up
|
||
after 15 of them, since we're getting silly then */
|
||
while (pc < opc + 15 * 2)
|
||
{
|
||
/* See where the registers will be saved to */
|
||
if (IS_PUSH (insn))
|
||
{
|
||
pc += 2;
|
||
rn = GET_PUSHED_REG (insn);
|
||
where[rn] = depth;
|
||
insn = read_memory_integer (pc, 2);
|
||
depth += 4;
|
||
}
|
||
else if (IS_STS (insn))
|
||
{
|
||
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;
|
||
depth += -((char) (insn & 0xff));
|
||
insn = read_memory_integer (pc, 2);
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
|
||
/* Now we know how deep things are, we can work out their addresses */
|
||
|
||
for (rn = 0; rn < NUM_REGS; rn++)
|
||
{
|
||
if (where[rn] >= 0)
|
||
{
|
||
if (rn == FP_REGNUM)
|
||
have_fp = 1;
|
||
|
||
fsr->regs[rn] = fi->frame - where[rn] + depth - 4;
|
||
}
|
||
else
|
||
{
|
||
fsr->regs[rn] = 0;
|
||
}
|
||
}
|
||
|
||
if (have_fp)
|
||
{
|
||
fsr->regs[SP_REGNUM] = read_memory_integer (fsr->regs[FP_REGNUM], 4);
|
||
}
|
||
else
|
||
{
|
||
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);
|
||
else
|
||
fi->return_pc = read_register (PR_REGNUM);
|
||
}
|
||
|
||
/* initialize the extra info saved in a FRAME */
|
||
|
||
void
|
||
init_extra_frame_info (fromleaf, fi)
|
||
int fromleaf;
|
||
struct frame_info *fi;
|
||
{
|
||
struct frame_saved_regs dummy;
|
||
|
||
if (fi->next)
|
||
fi->pc = fi->next->return_pc;
|
||
|
||
frame_find_saved_regs (fi, &dummy);
|
||
}
|
||
|
||
|
||
/* Discard from the stack the innermost frame,
|
||
restoring all saved registers. */
|
||
|
||
void
|
||
pop_frame ()
|
||
{
|
||
register struct frame_info *frame = get_current_frame ();
|
||
register CORE_ADDR fp;
|
||
register int regnum;
|
||
struct frame_saved_regs 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++)
|
||
{
|
||
if (fsr.regs[regnum])
|
||
{
|
||
write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
|
||
}
|
||
}
|
||
|
||
write_register (PC_REGNUM, frame->return_pc);
|
||
write_register (SP_REGNUM, fp + 4);
|
||
flush_cached_frames ();
|
||
}
|
||
|
||
/* Command to set the processor type. */
|
||
|
||
void
|
||
sh_set_processor_type_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
int i;
|
||
char *temp;
|
||
|
||
/* The `set' commands work by setting the value, then calling the hook,
|
||
so we let the general command modify a scratch location, then decide
|
||
here if we really want to modify the processor type. */
|
||
if (tmp_sh_processor_type == NULL || *tmp_sh_processor_type == '\0')
|
||
{
|
||
printf_unfiltered ("The known SH processor types are as follows:\n\n");
|
||
for (i = 0; sh_processor_type_table[i].name != NULL; ++i)
|
||
printf_unfiltered ("%s\n", sh_processor_type_table[i].name);
|
||
|
||
/* Restore the value. */
|
||
tmp_sh_processor_type = strsave (sh_processor_type);
|
||
|
||
return;
|
||
}
|
||
|
||
if (!sh_set_processor_type (tmp_sh_processor_type))
|
||
{
|
||
/* Restore to a valid value before erroring out. */
|
||
temp = tmp_sh_processor_type;
|
||
tmp_sh_processor_type = strsave (sh_processor_type);
|
||
error ("Unknown processor type `%s'.", temp);
|
||
}
|
||
}
|
||
|
||
static void
|
||
sh_show_processor_type_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
}
|
||
|
||
/* Modify the actual processor type. */
|
||
|
||
int
|
||
sh_set_processor_type (str)
|
||
char *str;
|
||
{
|
||
int i, j;
|
||
|
||
if (str == NULL)
|
||
return 0;
|
||
|
||
for (i = 0; sh_processor_type_table[i].name != NULL; ++i)
|
||
{
|
||
if (strcasecmp (str, sh_processor_type_table[i].name) == 0)
|
||
{
|
||
sh_processor_type = str;
|
||
|
||
for (j = 0; j < NUM_REGS; ++j)
|
||
reg_names[j] = sh_processor_type_table[i].regnames[j];
|
||
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* 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));
|
||
}
|
||
|
||
void
|
||
_initialize_sh_tdep ()
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
tm_print_insn = gdb_print_insn_sh;
|
||
|
||
c = add_set_cmd ("processor", class_support, var_string_noescape,
|
||
(char *) &tmp_sh_processor_type,
|
||
"Set the type of SH processor in use.\n\
|
||
Set this to be able to access processor-type-specific registers.\n\
|
||
",
|
||
&setlist);
|
||
c->function.cfunc = sh_set_processor_type_command;
|
||
c = add_show_from_set (c, &showlist);
|
||
c->function.cfunc = sh_show_processor_type_command;
|
||
|
||
tmp_sh_processor_type = strsave (DEFAULT_SH_TYPE);
|
||
sh_set_processor_type_command (strsave (DEFAULT_SH_TYPE), 0);
|
||
|
||
add_com ("regs", class_vars, show_regs, "Print all registers");
|
||
}
|