static void
frv_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
int reg, const gdb_byte *buffer)
{
if (reg == iacc0_regnum)
{
regcache_raw_write (regcache, iacc0h_regnum, buffer);
regcache_raw_write (regcache, iacc0l_regnum, (bfd_byte *) buffer + 4);
}
else if (accg0_regnum <= reg && reg <= accg7_regnum)
{
/* The accg raw registers have four values in each slot with the
lowest register number occupying the first byte. */
int raw_regnum = accg0123_regnum + (reg - accg0_regnum) / 4;
int byte_num = (reg - accg0_regnum) % 4;
char buf[4];
regcache_raw_read (regcache, raw_regnum, buf);
buf[byte_num] = ((bfd_byte *) buffer)[0];
regcache_raw_write (regcache, raw_regnum, buf);
}
}
static void
m68k_store_return_value (struct type *type, struct regcache *regcache,
const gdb_byte *valbuf)
{
int len = TYPE_LENGTH (type);
if (len <= 4)
regcache_raw_write_part (regcache, M68K_D0_REGNUM, 4 - len, len, valbuf);
else if (len <= 8)
{
regcache_raw_write_part (regcache, M68K_D0_REGNUM, 8 - len,
len - 4, valbuf);
regcache_raw_write (regcache, M68K_D1_REGNUM, valbuf + (len - 4));
}
else
internal_error (__FILE__, __LINE__,
_("Cannot store return value of %d bytes long."), len);
}
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR reg_addr)
{
char *srcp = core_reg_sect;
int regsize = mips_isa_regsize (current_gdbarch);
int regno;
/* If regsize is 8, this is a N32 or N64 core file.
If regsize is 4, this is an O32 core file. */
if (core_reg_size != regsize * NUM_REGS)
{
warning (_("wrong size gregset struct in core file"));
return;
}
for (regno = 0; regno < NUM_REGS; regno++)
{
regcache_raw_write (current_regcache, regno, srcp);
srcp += regsize;
}
}
static void
ppc_push_argument (struct ppc_stack_abi *abi,
struct ppc_stack_context *c, struct value *arg,
int argno, int do_copy, int floatonly)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
struct type *type = check_typedef (value_type (arg));
int len = TYPE_LENGTH (type);
gdb_byte buf[16];
c->argoffset = ROUND_UP (c->argoffset, 4);
switch (TYPE_CODE (type)) {
case TYPE_CODE_FLT:
{
if (c->freg <= abi->last_freg)
{
struct value *rval;
struct type *rtype;
int rlen;
/* APPLE LOCAL: If the thing is already a long double type,
don't cast it to a builtin type double, since there are two
long double types, and we will pass an 16 byte long double
wrong if we assume it is an 8 byte double. */
if (strcmp (TYPE_NAME (type), "long double") != 0)
{
rval = value_cast (builtin_type_double, arg);
rtype = check_typedef (value_type (rval));
rlen = TYPE_LENGTH (rtype);
}
else
{
rval = arg;
rtype = type;
rlen = len;
}
/* APPLE LOCAL: GCC 4.0 has 16 byte long doubles */
if ((len != 4) && (len != 8) && (len != 16))
error ("floating point parameter had unexpected size");
if (rlen != 8 && rlen != 16)
error ("floating point parameter had unexpected size");
if (do_copy)
regcache_raw_write (current_regcache, FP0_REGNUM + c->freg,
value_contents (rval));
if (do_copy && ! floatonly && abi->fregs_shadow_gregs)
ppc_copy_into_greg (current_regcache, c->greg, tdep->wordsize, len, value_contents (arg));
if (do_copy && ! floatonly && abi->regs_shadow_stack)
write_memory (c->sp + c->argoffset, value_contents (arg), len);
c->freg++;
/* APPLE LOCAL: We took up two registers... */
if (rlen == 16)
c->freg++;
if (! floatonly && (abi->fregs_shadow_gregs) && (c->greg <= abi->last_greg))
c->greg += len / 4;
if (! floatonly && abi->regs_shadow_stack)
c->argoffset += len;
}
else if (! floatonly)
{
if ((len != 4) && (len != 8) && (len != 16))
error ("floating point parameter had unexpected size");
c->argoffset = ROUND_UP (c->argoffset, len);
if (do_copy)
write_memory (c->sp + c->argoffset, value_contents (arg), len);
c->argoffset += len;
}
break;
}
case TYPE_CODE_INT:
case TYPE_CODE_ENUM:
case TYPE_CODE_PTR:
case TYPE_CODE_REF:
{
int nregs;
gdb_byte *val_contents;
if (floatonly)
break;
/* APPLE LOCAL: Huge Hack... The problem is that if we are a 32
bit app on Mac OS X, the registers are really 64 bits, but we
don't want to pass all 64 bits. So if we get passed a value
that came from a register, and it's length is > the wordsize,
cast it to the wordsize first before passing it in. */
if (VALUE_REGNUM (arg) != -1 && len == 8 && tdep->wordsize == 4)
{
len = 4;
val_contents = value_contents (arg) + 4;
}
else
val_contents = value_contents (arg);
/* END APPLE LOCAL */
nregs = (len <= 4) ? 1 : 2;
if ((len != 1) && (len != 2) && (len != 4) && (len != 8))
error ("integer parameter had unexpected size");
if (c->greg <= abi->last_greg)
{
/* If the parameter fits in the remaining argument registers, write it to
the registers, and to the stack if the abi requires it. */
if (do_copy)
{
/* Split the argument between registers & the stack if it
doesn't fit in the remaining registers. */
int regs_avaliable = abi->last_greg - c->greg + 1;
if (regs_avaliable >= nregs)
regs_avaliable = nregs;
ppc_copy_into_greg (current_regcache, c->greg,
tdep->wordsize, regs_avaliable * 4, val_contents);
}
if (do_copy && abi->regs_shadow_stack)
write_memory (c->sp + c->argoffset, val_contents, len);
c->greg += nregs;
if (abi->regs_shadow_stack)
c->argoffset += (nregs * 4);
}
else
{
/* If we've filled up the registers, then just write it on the stack. */
if (do_copy)
write_memory (c->sp + c->argoffset, val_contents, len);
c->argoffset += (nregs * 4);
}
break;
}
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
{
if (! abi->structs_with_args)
{
if (floatonly)
break;
if (len > 4)
{
/* Rounding to the nearest multiple of 8 may not be necessary,
but it is safe. Particularly since we don't know the
field types of the structure */
c->structoffset = ROUND_UP (c->structoffset, 8);
if (do_copy)
{
write_memory (c->sp + c->structoffset, value_contents (arg), len);
store_unsigned_integer (buf, 4, c->sp + c->structoffset);
}
c->structoffset += ROUND_UP (len, 8);
}
else
if (do_copy)
{
memset (buf, 0, 4);
memcpy (buf, value_contents (arg), len);
}
if (c->greg <= abi->last_greg)
{
if (do_copy)
ppc_copy_into_greg (current_regcache, c->greg, tdep->wordsize, 4, buf);
c->greg++;
}
else
{
if (do_copy)
write_memory (c->sp + c->argoffset, buf, 4);
c->argoffset += 4;
}
break;
}
else
{
int i;
int regspace = (abi->last_greg - c->greg + 1) * 4;
int stackspace = (len <= regspace) ? 0 : (len - regspace);
int writereg = (regspace > len) ? len : regspace;
int writestack = abi->regs_shadow_stack ? len : stackspace;
for (i = 0; i < TYPE_NFIELDS (type); i++)
{
struct value *subarg = value_field (arg, i);
ppc_push_argument (abi, c, subarg, argno, do_copy, 1);
}
if (floatonly)
break;
if (do_copy)
{
gdb_byte *ptr = value_contents (arg);
if (len < 4)
{
memset (buf, 0, 4);
if ((len == 1) || (len == 2))
memcpy (buf + 4 - len, ptr, len);
else
memcpy (buf, ptr, len);
ptr = buf;
}
ppc_copy_into_greg (current_regcache, c->greg,
tdep->wordsize, (writereg < 4) ? 4 : writereg, ptr);
write_memory (c->sp + c->argoffset, ptr,
(writestack < 4) ? 4 : writestack);
}
c->greg += ROUND_UP (writereg, 4) / 4;
c->argoffset += writestack;
}
break;
}
case TYPE_CODE_ARRAY:
{
if (floatonly)
break;
if (! TYPE_VECTOR (type))
error ("non-vector array type");
if (len != 16)
error ("unexpected vector length");
if (c->vreg <= abi->last_vreg)
{
if (do_copy)
regcache_raw_write (current_regcache, tdep->ppc_vr0_regnum + c->vreg,
value_contents (arg));
c->vreg++;
}
else
{
/* Vector arguments must be aligned to 16 bytes on
the stack. */
c->argoffset = ROUND_UP (c->argoffset, 16);
if (do_copy)
write_memory (c->sp + c->argoffset, value_contents (arg), len);
c->argoffset += len;
}
break;
}
default:
error ("argument %d has unknown type code 0x%x (%s)",
argno, TYPE_CODE (type),
type_code_name (TYPE_CODE (type)));
}
return;
}
static CORE_ADDR
m88k_store_arguments (struct regcache *regcache, int nargs,
struct value **args, CORE_ADDR sp)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
int num_register_words = 0;
int num_stack_words = 0;
int i;
for (i = 0; i < nargs; i++)
{
struct type *type = value_type (args[i]);
int len = TYPE_LENGTH (type);
if (m88k_integral_or_pointer_p (type) && len < 4)
{
args[i] = value_cast (builtin_type (gdbarch)->builtin_int32,
args[i]);
type = value_type (args[i]);
len = TYPE_LENGTH (type);
}
if (m88k_in_register_p (type))
{
int num_words = 0;
if (num_register_words % 2 == 1 && m88k_8_byte_align_p (type))
num_words++;
num_words += ((len + 3) / 4);
if (num_register_words + num_words <= 8)
{
num_register_words += num_words;
continue;
}
/* We've run out of available registers. Pass the argument
on the stack. */
}
if (num_stack_words % 2 == 1 && m88k_8_byte_align_p (type))
num_stack_words++;
num_stack_words += ((len + 3) / 4);
}
/* Allocate stack space. */
sp = align_down (sp - 32 - num_stack_words * 4, 16);
num_stack_words = num_register_words = 0;
for (i = 0; i < nargs; i++)
{
const bfd_byte *valbuf = value_contents (args[i]);
struct type *type = value_type (args[i]);
int len = TYPE_LENGTH (type);
int stack_word = num_stack_words;
if (m88k_in_register_p (type))
{
int register_word = num_register_words;
if (register_word % 2 == 1 && m88k_8_byte_align_p (type))
register_word++;
gdb_assert (len == 4 || len == 8);
if (register_word + len / 8 < 8)
{
int regnum = M88K_R2_REGNUM + register_word;
regcache_raw_write (regcache, regnum, valbuf);
if (len > 4)
regcache_raw_write (regcache, regnum + 1, valbuf + 4);
num_register_words = (register_word + len / 4);
continue;
}
}
if (stack_word % 2 == -1 && m88k_8_byte_align_p (type))
stack_word++;
write_memory (sp + stack_word * 4, valbuf, len);
num_stack_words = (stack_word + (len + 3) / 4);
}
return sp;
}
static CORE_ADDR
i386_darwin_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
int i;
int write_pass;
/* Determine the total space required for arguments and struct
return address in a first pass, then push arguments in a second pass. */
for (write_pass = 0; write_pass < 2; write_pass++)
{
int args_space = 0;
int num_m128 = 0;
if (struct_return)
{
if (write_pass)
{
/* Push value address. */
store_unsigned_integer (buf, 4, byte_order, struct_addr);
write_memory (sp, buf, 4);
}
args_space += 4;
}
for (i = 0; i < nargs; i++)
{
struct type *arg_type = value_enclosing_type (args[i]);
if (i386_m128_p (arg_type) && num_m128 < 4)
{
if (write_pass)
{
const gdb_byte *val = value_contents_all (args[i]);
regcache_raw_write
(regcache, I387_MM0_REGNUM(tdep) + num_m128, val);
}
num_m128++;
}
else
{
args_space = align_up (args_space,
i386_darwin_arg_type_alignment (arg_type));
if (write_pass)
write_memory (sp + args_space,
value_contents_all (args[i]),
TYPE_LENGTH (arg_type));
/* The System V ABI says that:
"An argument's size is increased, if necessary, to make it a
multiple of [32-bit] words. This may require tail padding,
depending on the size of the argument."
This makes sure the stack stays word-aligned. */
args_space += align_up (TYPE_LENGTH (arg_type), 4);
}
}
/* Darwin i386 ABI:
1. The caller ensures that the stack is 16-byte aligned at the point
of the function call. */
if (!write_pass)
sp = align_down (sp - args_space, 16);
}
/* Store return address. */
sp -= 4;
store_unsigned_integer (buf, 4, byte_order, bp_addr);
write_memory (sp, buf, 4);
/* Finally, update the stack pointer... */
store_unsigned_integer (buf, 4, byte_order, sp);
regcache_cooked_write (regcache, I386_ESP_REGNUM, buf);
/* ...and fake a frame pointer. */
regcache_cooked_write (regcache, I386_EBP_REGNUM, buf);
/* MarkK wrote: This "+ 8" is all over the place:
(i386_frame_this_id, i386_sigtramp_frame_this_id,
i386_dummy_id). It's there, since all frame unwinders for
a given target have to agree (within a certain margin) on the
definition of the stack address of a frame. Otherwise frame id
comparison might not work correctly. Since DWARF2/GCC uses the
stack address *before* the function call as a frame's CFA. On
the i386, when %ebp is used as a frame pointer, the offset
between the contents %ebp and the CFA as defined by GCC. */
return sp + 8;
}
