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* arm-tdep.h (enum arm_float_model): New enum. 

(struct gdbarch_tdep): Add fp_model.
* arm-tdep.c (arm_gdbarch_init): Set fp_model in tdep.  Defer setting
up floating-point conversions until we know the floating-point model
in use by the inferior.  Don't complain about being unable to
determine the ABI of the inferior when we don't have one.
(arm_extract_return_value): Support different floating-point models.
(arm_store_return_value): Likewise.
* armnbsd-tdep.c (arm_netbsd_aout_init_abi): Set fp_model in tdep to
ARM_FLOAT_SOFT.
(arm_netbsd_elf_init_abi): Set fp_model to ARM_FLOAT_SOFT_VFP.
This commit is contained in:
Richard Earnshaw 2002-02-19 19:20:31 +00:00
parent 45b38a80ad
commit 08216dd78d
4 changed files with 127 additions and 20 deletions
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14
gdb/ChangeLog
View File

@ -1,3 +1,17 @@
2002-02-19 Richard Earnshaw <rearnsha@arm.com>
* arm-tdep.h (enum arm_float_model): New enum.
(struct gdbarch_tdep): Add fp_model.
* arm-tdep.c (arm_gdbarch_init): Set fp_model in tdep. Defer setting
up floating-point conversions until we know the floating-point model
in use by the inferior. Don't complain about being unable to
determine the ABI of the inferior when we don't have one.
(arm_extract_return_value): Support different floating-point models.
(arm_store_return_value): Likewise.
* armnbsd-tdep.c (arm_netbsd_aout_init_abi): Set fp_model in tdep to
ARM_FLOAT_SOFT.
(arm_netbsd_elf_init_abi): Set fp_model to ARM_FLOAT_SOFT_VFP.
2002-02-19 Peter Schauer <pes@regent.e-technik.tu-muenchen.de>
* i386-tdep.c (i386_gdbarch_init): Eliminate incorrect use

108
gdb/arm-tdep.c
View File

@ -2139,7 +2139,29 @@ arm_extract_return_value (struct type *type,
char *valbuf)
{
if (TYPE_CODE_FLT == TYPE_CODE (type))
convert_from_extended (&regbuf[REGISTER_BYTE (ARM_F0_REGNUM)], valbuf);
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
switch (tdep->fp_model)
{
case ARM_FLOAT_FPA:
convert_from_extended (&regbuf[REGISTER_BYTE (ARM_F0_REGNUM)],
valbuf);
break;
case ARM_FLOAT_SOFT:
case ARM_FLOAT_SOFT_VFP:
memcpy (valbuf, &regbuf[REGISTER_BYTE (ARM_A1_REGNUM)],
TYPE_LENGTH (type));
break;
default:
internal_error
(__FILE__, __LINE__,
"arm_extract_return_value: Floating point model not supported");
break;
}
}
else
memcpy (valbuf, &regbuf[REGISTER_BYTE (ARM_A1_REGNUM)],
TYPE_LENGTH (type));
@ -2256,15 +2278,32 @@ arm_store_return_value (struct type *type, char *valbuf)
{
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
char buf[MAX_REGISTER_RAW_SIZE];
convert_to_extended (valbuf, buf);
/* XXX Is this correct for soft-float? */
write_register_bytes (REGISTER_BYTE (ARM_F0_REGNUM), buf,
MAX_REGISTER_RAW_SIZE);
switch (tdep->fp_model)
{
case ARM_FLOAT_FPA:
convert_to_extended (valbuf, buf);
write_register_bytes (REGISTER_BYTE (ARM_F0_REGNUM), buf,
MAX_REGISTER_RAW_SIZE);
break;
case ARM_FLOAT_SOFT:
case ARM_FLOAT_SOFT_VFP:
write_register_bytes (ARM_A1_REGNUM, valbuf, TYPE_LENGTH (type));
break;
default:
internal_error
(__FILE__, __LINE__,
"arm_store_return_value: Floating point model not supported");
break;
}
}
else
write_register_bytes (0, valbuf, TYPE_LENGTH (type));
write_register_bytes (ARM_A1_REGNUM, valbuf, TYPE_LENGTH (type));
}
/* Store the address of the place in which to copy the structure the
@ -2762,7 +2801,10 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdep->abi_name = "<invalid>";
}
/* Breakpoints and floating point sizes and format. */
/* This is the way it has always defaulted. */
tdep->fp_model = ARM_FLOAT_FPA;
/* Breakpoints. */
switch (info.byte_order)
{
case BFD_ENDIAN_BIG:
@ -2771,10 +2813,6 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdep->thumb_breakpoint = arm_default_thumb_be_breakpoint;
tdep->thumb_breakpoint_size = sizeof (arm_default_thumb_be_breakpoint);
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_big);
set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
break;
case BFD_ENDIAN_LITTLE:
@ -2783,12 +2821,6 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
tdep->thumb_breakpoint = arm_default_thumb_le_breakpoint;
tdep->thumb_breakpoint_size = sizeof (arm_default_thumb_le_breakpoint);
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
set_gdbarch_double_format (gdbarch,
&floatformat_ieee_double_littlebyte_bigword);
set_gdbarch_long_double_format (gdbarch,
&floatformat_ieee_double_littlebyte_bigword);
break;
default:
@ -2905,9 +2937,12 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
/* Hook in the ABI-specific overrides, if they have been registered. */
if (arm_abi == ARM_ABI_UNKNOWN)
{
fprintf_filtered
(gdb_stderr, "GDB doesn't recognize the ABI of the inferior. "
"Attempting to continue with the default ARM settings");
/* Don't complain about not knowing the ABI variant if we don't
have an inferior. */
if (info.abfd)
fprintf_filtered
(gdb_stderr, "GDB doesn't recognize the ABI of the inferior. "
"Attempting to continue with the default ARM settings");
}
else
{
@ -2939,6 +2974,39 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, arm_get_longjmp_target);
/* Floating point sizes and format. */
switch (info.byte_order)
{
case BFD_ENDIAN_BIG:
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_big);
set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
break;
case BFD_ENDIAN_LITTLE:
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
if (tdep->fp_model == ARM_FLOAT_VFP
|| tdep->fp_model == ARM_FLOAT_SOFT_VFP)
{
set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_little);
set_gdbarch_long_double_format (gdbarch,
&floatformat_ieee_double_little);
}
else
{
set_gdbarch_double_format
(gdbarch, &floatformat_ieee_double_littlebyte_bigword);
set_gdbarch_long_double_format
(gdbarch, &floatformat_ieee_double_littlebyte_bigword);
}
break;
default:
internal_error (__FILE__, __LINE__,
"arm_gdbarch_init: bad byte order for float format");
}
/* We can't use SIZEOF_FRAME_SAVED_REGS here, since that still
references the old architecture vector, not the one we are
building here. */

18
gdb/arm-tdep.h
View File

@ -116,11 +116,29 @@ enum arm_abi
ARM_ABI_INVALID /* Keep this last. */
};
/* Type of floating-point code in use by inferior. There are really 3 models
that are traditionally supported (plus the endianness issue), but gcc can
only generate 2 of those. The third is APCS_FLOAT, where arguments to
functions are passed in floating-point registers.
In addition to the traditional models, VFP adds two more. */
enum arm_float_model
{
ARM_FLOAT_SOFT,
ARM_FLOAT_FPA,
ARM_FLOAT_SOFT_VFP,
ARM_FLOAT_VFP
};
/* Target-dependent structure in gdbarch. */
struct gdbarch_tdep
{
enum arm_abi arm_abi; /* OS/ABI of inferior. */
const char *abi_name; /* Name of the above. */
enum arm_float_model fp_model; /* Floating point calling conventions. */
CORE_ADDR lowest_pc; /* Lowest address at which instructions
will appear. */

7
gdb/armnbsd-tdep.c
View File

@ -57,17 +57,24 @@ static void
arm_netbsd_aout_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
arm_netbsd_init_abi_common (info, gdbarch);
set_gdbarch_in_solib_call_trampoline
(gdbarch, arm_netbsd_aout_in_solib_call_trampoline);
tdep->fp_model = ARM_FLOAT_SOFT;
}
static void
arm_netbsd_elf_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
arm_netbsd_init_abi_common (info, gdbarch);
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
}
void