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* m68hc11-tdep.c (M68HC12_NUM_PSEUDO_REGS): New define.

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(M68HC12_HARD_PC_REGNUM): Define specific PC for 68HC12 (pseudo reg).
	(m68hc11_pseudo_register_read): Compute the 68HC12 PC using the
	real PC and the page number (if it's within the memory bank window).
	(m68hc11_pseudo_register_write): Likewise when saving.
	(m68hc11_register_name): Name the virtual pc 'pc' and the real one ppc.
	(m68hc11_register_virtual_type): Return uint32 for virtual pc.
	(m68hc11_register_raw_size): And use 32-bit for it.
	(m68hc11_gdbarch_init): Use 32-bit address for 68HC12 if the
	16K memory bank is used by the prog; also use the virtual pc.
This commit is contained in:
Stephane Carrez 2002-08-13 17:24:50 +00:00
parent 7df11f5981
commit 548bcbeca8
2 changed files with 81 additions and 3 deletions
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13
gdb/ChangeLog
View file

@ -1,3 +1,16 @@
2002-08-13 Stephane Carrez <stcarrez@nerim.fr>
* m68hc11-tdep.c (M68HC12_NUM_PSEUDO_REGS): New define.
(M68HC12_HARD_PC_REGNUM): Define specific PC for 68HC12 (pseudo reg).
(m68hc11_pseudo_register_read): Compute the 68HC12 PC using the
real PC and the page number (if it's within the memory bank window).
(m68hc11_pseudo_register_write): Likewise when saving.
(m68hc11_register_name): Name the virtual pc 'pc' and the real one ppc.
(m68hc11_register_virtual_type): Return uint32 for virtual pc.
(m68hc11_register_raw_size): And use 32-bit for it.
(m68hc11_gdbarch_init): Use 32-bit address for 68HC12 if the
16K memory bank is used by the prog; also use the virtual pc.
2002-08-13 Stephane Carrez <stcarrez@nerim.fr>
* m68hc11-tdep.c (m68hc11_elf_make_msymbol_special): New function.

71
gdb/m68hc11-tdep.c
View file

@ -128,6 +128,10 @@ enum insn_return_kind {
#define M68HC11_REG_SIZE (2)
#define M68HC12_NUM_REGS (9)
#define M68HC12_NUM_PSEUDO_REGS ((M68HC11_MAX_SOFT_REGS+5)+1-1)
#define M68HC12_HARD_PC_REGNUM (SOFT_D32_REGNUM+1)
struct insn_sequence;
struct gdbarch_tdep
{
@ -280,6 +284,24 @@ m68hc11_pseudo_register_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int regno, void *buf)
{
/* The PC is a pseudo reg only for 68HC12 with the memory bank
addressing mode. */
if (regno == M68HC12_HARD_PC_REGNUM)
{
const int regsize = TYPE_LENGTH (builtin_type_uint32);
CORE_ADDR pc = read_register (HARD_PC_REGNUM);
int page = read_register (HARD_PAGE_REGNUM);
if (pc >= 0x8000 && pc < 0xc000)
{
pc -= 0x8000;
pc += (page << 14);
pc += 0x1000000;
}
store_unsigned_integer (buf, regsize, pc);
return;
}
m68hc11_initialize_register_info ();
/* Fetch a soft register: translate into a memory read. */
@ -300,6 +322,28 @@ m68hc11_pseudo_register_write (struct gdbarch *gdbarch,
struct regcache *regcache,
int regno, const void *buf)
{
/* The PC is a pseudo reg only for 68HC12 with the memory bank
addressing mode. */
if (regno == M68HC12_HARD_PC_REGNUM)
{
const int regsize = TYPE_LENGTH (builtin_type_uint32);
char *tmp = alloca (regsize);
CORE_ADDR pc;
memcpy (tmp, buf, regsize);
pc = extract_unsigned_integer (tmp, regsize);
if (pc >= 0x1000000)
{
pc -= 0x1000000;
write_register (HARD_PAGE_REGNUM, (pc >> 14) & 0x0ff);
pc &= 0x03fff;
write_register (HARD_PC_REGNUM, pc + 0x8000);
}
else
write_register (HARD_PC_REGNUM, pc);
return;
}
m68hc11_initialize_register_info ();
/* Store a soft register: translate into a memory write. */
@ -315,6 +359,11 @@ m68hc11_pseudo_register_write (struct gdbarch *gdbarch,
static const char *
m68hc11_register_name (int reg_nr)
{
if (reg_nr == M68HC12_HARD_PC_REGNUM && USE_PAGE_REGISTER)
return "pc";
if (reg_nr == HARD_PC_REGNUM && USE_PAGE_REGISTER)
return "ppc";
if (reg_nr < 0)
return NULL;
if (reg_nr >= M68HC11_ALL_REGS)
@ -1011,6 +1060,9 @@ m68hc11_register_virtual_type (int reg_nr)
case HARD_CCR_REGNUM:
return builtin_type_uint8;
case M68HC12_HARD_PC_REGNUM:
return builtin_type_uint32;
default:
return builtin_type_uint16;
}
@ -1144,6 +1196,9 @@ m68hc11_register_raw_size (int reg_nr)
case HARD_CCR_REGNUM:
return 1;
case M68HC12_HARD_PC_REGNUM:
return 4;
default:
return M68HC11_REG_SIZE;
}
@ -1214,12 +1269,25 @@ m68hc11_gdbarch_init (struct gdbarch_info info,
tdep->stack_correction = 1;
tdep->use_page_register = 0;
tdep->prologue = m6811_prologue;
set_gdbarch_addr_bit (gdbarch, 16);
set_gdbarch_num_pseudo_regs (gdbarch, M68HC11_NUM_PSEUDO_REGS);
set_gdbarch_pc_regnum (gdbarch, HARD_PC_REGNUM);
set_gdbarch_num_regs (gdbarch, M68HC11_NUM_REGS);
break;
case bfd_arch_m68hc12:
tdep->stack_correction = 0;
tdep->use_page_register = elf_flags & E_M68HC12_BANKS;
tdep->prologue = m6812_prologue;
set_gdbarch_addr_bit (gdbarch, elf_flags & E_M68HC12_BANKS ? 32 : 16);
set_gdbarch_num_pseudo_regs (gdbarch,
elf_flags & E_M68HC12_BANKS
? M68HC12_NUM_PSEUDO_REGS
: M68HC11_NUM_PSEUDO_REGS);
set_gdbarch_pc_regnum (gdbarch, elf_flags & E_M68HC12_BANKS
? M68HC12_HARD_PC_REGNUM : HARD_PC_REGNUM);
set_gdbarch_num_regs (gdbarch, elf_flags & E_M68HC12_BANKS
? M68HC12_NUM_REGS : M68HC11_NUM_REGS);
break;
default:
@ -1255,11 +1323,8 @@ m68hc11_gdbarch_init (struct gdbarch_info info,
set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
set_gdbarch_num_regs (gdbarch, M68HC11_NUM_REGS);
set_gdbarch_num_pseudo_regs (gdbarch, M68HC11_NUM_PSEUDO_REGS);
set_gdbarch_sp_regnum (gdbarch, HARD_SP_REGNUM);
set_gdbarch_fp_regnum (gdbarch, SOFT_FP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, HARD_PC_REGNUM);
set_gdbarch_register_name (gdbarch, m68hc11_register_name);
set_gdbarch_register_size (gdbarch, 2);
set_gdbarch_register_bytes (gdbarch, M68HC11_ALL_REGS * 2);