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* arm-tdep.c (arm_use_struct_convention): Make static. Move to be
with other related struct-returning functions. (arm_extract_struct_value_address): New function. (arm_gdbarch_init): Initialize the above in multi-arch vector. Also initialize float_format, double_format and long_double_format as appropriate to the endianness of the target. * config/arm/tm-arm.h (TARGET_DOUBLE_FORMAT): Delete. (arm_use_struct_convention): Delete declaration. (USE_STRUCT_CONVENTION, EXTRACT_STRUCT_VALUE_ADDRESS): Delete.
This commit is contained in:
Richard Earnshaw
parent
9ae9b4eac4
commit
67255d04f2
@ -1,3 +1,15 @@
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2002-02-13 Richard Earnshaw <rearnsha@arm.com>
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* arm-tdep.c (arm_use_struct_convention): Make static. Move to be
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with other related struct-returning functions.
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(arm_extract_struct_value_address): New function.
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(arm_gdbarch_init): Initialize the above in multi-arch vector. Also
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initialize float_format, double_format and long_double_format as
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appropriate to the endianness of the target.
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* config/arm/tm-arm.h (TARGET_DOUBLE_FORMAT): Delete.
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(arm_use_struct_convention): Delete declaration.
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(USE_STRUCT_CONVENTION, EXTRACT_STRUCT_VALUE_ADDRESS): Delete.
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2002-02-13 Keith Seitz <keiths@redhat.com>
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* defs.h (core_addr_to_string_nz): New function.
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222
gdb/arm-tdep.c
222
gdb/arm-tdep.c
@ -145,100 +145,6 @@ struct frame_extra_info
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#define MAKE_THUMB_ADDR(addr) ((addr) | 1)
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#define UNMAKE_THUMB_ADDR(addr) ((addr) & ~1)
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/* Will a function return an aggregate type in memory or in a
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register? Return 0 if an aggregate type can be returned in a
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register, 1 if it must be returned in memory. */
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int
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arm_use_struct_convention (int gcc_p, struct type *type)
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{
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int nRc;
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register enum type_code code;
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/* In the ARM ABI, "integer" like aggregate types are returned in
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registers. For an aggregate type to be integer like, its size
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must be less than or equal to REGISTER_SIZE and the offset of
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each addressable subfield must be zero. Note that bit fields are
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not addressable, and all addressable subfields of unions always
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start at offset zero.
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This function is based on the behaviour of GCC 2.95.1.
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See: gcc/arm.c: arm_return_in_memory() for details.
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Note: All versions of GCC before GCC 2.95.2 do not set up the
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parameters correctly for a function returning the following
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structure: struct { float f;}; This should be returned in memory,
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not a register. Richard Earnshaw sent me a patch, but I do not
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know of any way to detect if a function like the above has been
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compiled with the correct calling convention. */
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/* All aggregate types that won't fit in a register must be returned
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in memory. */
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if (TYPE_LENGTH (type) > REGISTER_SIZE)
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{
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return 1;
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}
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/* The only aggregate types that can be returned in a register are
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structs and unions. Arrays must be returned in memory. */
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code = TYPE_CODE (type);
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if ((TYPE_CODE_STRUCT != code) && (TYPE_CODE_UNION != code))
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{
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return 1;
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}
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/* Assume all other aggregate types can be returned in a register.
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Run a check for structures, unions and arrays. */
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nRc = 0;
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if ((TYPE_CODE_STRUCT == code) || (TYPE_CODE_UNION == code))
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{
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int i;
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/* Need to check if this struct/union is "integer" like. For
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this to be true, its size must be less than or equal to
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REGISTER_SIZE and the offset of each addressable subfield
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must be zero. Note that bit fields are not addressable, and
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unions always start at offset zero. If any of the subfields
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is a floating point type, the struct/union cannot be an
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integer type. */
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/* For each field in the object, check:
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1) Is it FP? --> yes, nRc = 1;
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2) Is it addressable (bitpos != 0) and
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not packed (bitsize == 0)?
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--> yes, nRc = 1
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*/
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for (i = 0; i < TYPE_NFIELDS (type); i++)
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{
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enum type_code field_type_code;
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field_type_code = TYPE_CODE (TYPE_FIELD_TYPE (type, i));
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/* Is it a floating point type field? */
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if (field_type_code == TYPE_CODE_FLT)
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{
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nRc = 1;
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break;
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}
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/* If bitpos != 0, then we have to care about it. */
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if (TYPE_FIELD_BITPOS (type, i) != 0)
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{
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/* Bitfields are not addressable. If the field bitsize is
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zero, then the field is not packed. Hence it cannot be
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a bitfield or any other packed type. */
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if (TYPE_FIELD_BITSIZE (type, i) == 0)
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{
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nRc = 1;
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break;
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}
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}
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}
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}
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return nRc;
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}
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static int
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arm_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
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{
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@ -2206,6 +2112,109 @@ arm_extract_return_value (struct type *type,
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TYPE_LENGTH (type));
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}
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value. */
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static CORE_ADDR
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arm_extract_struct_value_address (char *regbuf)
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{
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return extract_address (regbuf, REGISTER_RAW_SIZE(ARM_A1_REGNUM));
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}
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/* Will a function return an aggregate type in memory or in a
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register? Return 0 if an aggregate type can be returned in a
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register, 1 if it must be returned in memory. */
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static int
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arm_use_struct_convention (int gcc_p, struct type *type)
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{
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int nRc;
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register enum type_code code;
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/* In the ARM ABI, "integer" like aggregate types are returned in
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registers. For an aggregate type to be integer like, its size
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must be less than or equal to REGISTER_SIZE and the offset of
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each addressable subfield must be zero. Note that bit fields are
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not addressable, and all addressable subfields of unions always
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start at offset zero.
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This function is based on the behaviour of GCC 2.95.1.
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See: gcc/arm.c: arm_return_in_memory() for details.
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Note: All versions of GCC before GCC 2.95.2 do not set up the
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parameters correctly for a function returning the following
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structure: struct { float f;}; This should be returned in memory,
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not a register. Richard Earnshaw sent me a patch, but I do not
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know of any way to detect if a function like the above has been
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compiled with the correct calling convention. */
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/* All aggregate types that won't fit in a register must be returned
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in memory. */
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if (TYPE_LENGTH (type) > REGISTER_SIZE)
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{
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return 1;
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}
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/* The only aggregate types that can be returned in a register are
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structs and unions. Arrays must be returned in memory. */
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code = TYPE_CODE (type);
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if ((TYPE_CODE_STRUCT != code) && (TYPE_CODE_UNION != code))
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{
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return 1;
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}
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/* Assume all other aggregate types can be returned in a register.
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Run a check for structures, unions and arrays. */
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nRc = 0;
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if ((TYPE_CODE_STRUCT == code) || (TYPE_CODE_UNION == code))
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{
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int i;
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/* Need to check if this struct/union is "integer" like. For
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this to be true, its size must be less than or equal to
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REGISTER_SIZE and the offset of each addressable subfield
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must be zero. Note that bit fields are not addressable, and
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unions always start at offset zero. If any of the subfields
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is a floating point type, the struct/union cannot be an
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integer type. */
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/* For each field in the object, check:
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1) Is it FP? --> yes, nRc = 1;
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2) Is it addressable (bitpos != 0) and
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not packed (bitsize == 0)?
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--> yes, nRc = 1
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*/
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for (i = 0; i < TYPE_NFIELDS (type); i++)
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{
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enum type_code field_type_code;
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field_type_code = TYPE_CODE (TYPE_FIELD_TYPE (type, i));
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/* Is it a floating point type field? */
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if (field_type_code == TYPE_CODE_FLT)
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{
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nRc = 1;
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break;
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}
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/* If bitpos != 0, then we have to care about it. */
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if (TYPE_FIELD_BITPOS (type, i) != 0)
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{
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/* Bitfields are not addressable. If the field bitsize is
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zero, then the field is not packed. Hence it cannot be
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a bitfield or any other packed type. */
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if (TYPE_FIELD_BITSIZE (type, i) == 0)
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{
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nRc = 1;
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break;
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}
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}
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}
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}
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return nRc;
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}
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/* Write into appropriate registers a function return value of type
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TYPE, given in virtual format. */
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@ -2442,6 +2451,28 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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/* XXX We'll probably need to set the tdep field soon. */
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gdbarch = gdbarch_alloc (&info, NULL);
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/* Floating point sizes and format. */
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switch (info.byte_order)
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{
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case BFD_ENDIAN_BIG:
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set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
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set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_big);
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set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
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break;
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case BFD_ENDIAN_LITTLE:
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set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
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set_gdbarch_double_format (gdbarch,
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&floatformat_ieee_double_littlebyte_bigword);
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set_gdbarch_long_double_format (gdbarch,
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&floatformat_ieee_double_littlebyte_bigword);
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break;
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default:
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internal_error (__FILE__, __LINE__,
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"arm_gdbarch_init: bad byte order for float format");
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}
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set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
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/* Call dummy code. */
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@ -2522,6 +2553,9 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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set_gdbarch_extract_return_value (gdbarch, arm_extract_return_value);
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set_gdbarch_store_return_value (gdbarch, arm_store_return_value);
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set_gdbarch_store_struct_return (gdbarch, arm_store_struct_return);
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set_gdbarch_use_struct_convention (gdbarch, arm_use_struct_convention);
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set_gdbarch_extract_struct_value_address (gdbarch,
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arm_extract_struct_value_address);
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/* Single stepping. */
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/* XXX For an RDI target we should ask the target if it can single-step. */
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@ -26,14 +26,6 @@
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#define GDB_MULTI_ARCH 1
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#endif
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#include "regcache.h"
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#include "floatformat.h"
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/* IEEE format floating point. */
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#define TARGET_DOUBLE_FORMAT (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG \
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? &floatformat_ieee_double_big \
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: &floatformat_ieee_double_littlebyte_bigword)
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/* The following define instruction sequences that will cause ARM
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cpu's to take an undefined instruction trap. These are used to
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signal a breakpoint to GDB.
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@ -69,18 +61,6 @@
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#define THUMB_LE_BREAKPOINT {0xfe,0xdf}
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#define THUMB_BE_BREAKPOINT {0xdf,0xfe}
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/* The system C compiler uses a similar structure return convention to gcc */
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extern use_struct_convention_fn arm_use_struct_convention;
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#define USE_STRUCT_CONVENTION(gcc_p, type) \
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arm_use_struct_convention (gcc_p, type)
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value,
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as a CORE_ADDR (or an expression that can be used as one). */
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#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
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(extract_address ((PTR)(REGBUF), REGISTER_RAW_SIZE(0)))
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/* Specify that for the native compiler variables for a particular
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lexical context are listed after the beginning LBRAC instead of
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before in the executables list of symbols. */
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