/* Macro definitions for GDB on an Intel i[345]86.
- Copyright (C) 1995, 1996, 2000 Free Software Foundation, Inc.
+ Copyright 1995, 1996, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GDB.
#ifndef TM_I386_H
#define TM_I386_H 1
-/* Forward decl's for prototypes */
+#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
+
+#include "regcache.h"
+
+/* Forward declarations for prototypes. */
struct frame_info;
struct frame_saved_regs;
+struct value;
struct type;
-#define TARGET_BYTE_ORDER LITTLE_ENDIAN
-
/* The format used for `long double' on almost all i386 targets is the
i387 extended floating-point format. In fact, of all targets in the
GCC 2.95 tree, only OSF/1 does it different, and insists on having
#define TARGET_LONG_DOUBLE_BIT 96
-/* Used for example in valprint.c:print_floating() to enable checking
- for NaN's */
-
-#define IEEE_FLOAT (1)
-
/* Number of traps that happen between exec'ing the shell to run an
inferior, and when we finally get to the inferior code. This is 2
on most implementations. */
#define SKIP_PROLOGUE(frompc) (i386_skip_prologue (frompc))
-extern int i386_skip_prologue PARAMS ((int));
-
-/* Immediately after a function call, return the saved pc. Can't always go
- through the frames for this because on some machines the new frame is not
- set up until the new function executes some instructions. */
-
-#define SAVED_PC_AFTER_CALL(frame) (read_memory_integer (read_register (SP_REGNUM), 4))
+extern int i386_skip_prologue (int);
/* Stack grows downward. */
#define NUM_SSE_REGS (0)
#endif
-#define NUM_REGS (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS)
-
/* Largest number of registers we could have in any configuration. */
-#define MAX_NUM_REGS (16 + 16 + 9)
-
-/* Initializer for an array of names of registers. There should be at least
- NUM_REGS strings in this initializer. Any excess ones are simply ignored.
- The order of the first 8 registers must match the compiler's numbering
- scheme (which is the same as the 386 scheme) and also regmap in the various
- *-nat.c files. */
-
-#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
- "esp", "ebp", "esi", "edi", \
- "eip", "eflags", "cs", "ss", \
- "ds", "es", "fs", "gs", \
- "st0", "st1", "st2", "st3", \
- "st4", "st5", "st6", "st7", \
- "fctrl", "fstat", "ftag", "fiseg", \
- "fioff", "foseg", "fooff", "fop", \
- "xmm0", "xmm1", "xmm2", "xmm3", \
- "xmm4", "xmm5", "xmm6", "xmm7", \
- "mxcsr" \
- }
+#define MAX_NUM_REGS (16 + 16 + 9 + 1)
/* Register numbers of various important registers.
Note that some of these values are "real" register numbers,
#define PC_REGNUM 8 /* (eip) Contains program counter */
#define PS_REGNUM 9 /* (ps) Contains processor status */
-/* These registers are present only if HAVE_I387_REGS is #defined.
- We promise that FP0 .. FP7 will always be consecutive register numbers. */
-#define FP0_REGNUM 16 /* first FPU floating-point register */
-#define FP7_REGNUM 23 /* last FPU floating-point register */
-
-/* All of these control registers (except for FCOFF and FDOFF) are
- sixteen bits long (at most) in the FPU, but are zero-extended to
- thirty-two bits in GDB's register file. This makes it easier to
- compute the size of the control register file, and somewhat easier
- to convert to and from the FSAVE instruction's 32-bit format. */
-#define FIRST_FPU_CTRL_REGNUM 24
-#define FCTRL_REGNUM 24 /* FPU control word */
-#define FPC_REGNUM 24 /* old name for FCTRL_REGNUM */
-#define FSTAT_REGNUM 25 /* FPU status word */
-#define FTAG_REGNUM 26 /* FPU register tag word */
-#define FCS_REGNUM 27 /* FPU instruction's code segment selector
- 16 bits, called "FPU Instruction Pointer
- Selector" in the x86 manuals */
-#define FCOFF_REGNUM 28 /* FPU instruction's offset within segment
- ("Fpu Code OFFset") */
-#define FDS_REGNUM 29 /* FPU operand's data segment */
-#define FDOFF_REGNUM 30 /* FPU operand's offset within segment */
-#define FOP_REGNUM 31 /* FPU opcode, bottom eleven bits */
-#define LAST_FPU_CTRL_REGNUM 31
-
-/* These registers are present only if HAVE_SSE_REGS is #defined.
- We promise that XMM0 .. XMM7 will always have consecutive reg numbers. */
-#define XMM0_REGNUM 32 /* first SSE data register */
-#define XMM7_REGNUM 39 /* last SSE data register */
-#define MXCSR_REGNUM 40 /* Streaming SIMD Extension control/status */
-
-#define IS_FP_REGNUM(n) (FP0_REGNUM <= (n) && (n) <= FP7_REGNUM)
-#define IS_SSE_REGNUM(n) (XMM0_REGNUM <= (n) && (n) <= XMM7_REGNUM)
-
-#define FPU_REG_RAW_SIZE (10)
-
-/* Sizes of individual register sets. These cover the entire register
- file, so summing up the sizes of those portions actually present
- yields REGISTER_BYTES. */
-#define SIZEOF_GREGS (NUM_GREGS * 4)
-#define SIZEOF_FPU_REGS (8 * FPU_REG_RAW_SIZE)
-#define SIZEOF_FPU_CTRL_REGS \
- ((LAST_FPU_CTRL_REGNUM - FIRST_FPU_CTRL_REGNUM + 1) * 4)
-#define SIZEOF_SSE_REGS (8 * 16 + 4)
-
-
-/* Total amount of space needed to store our copies of the machine's register
- state, the array `registers'. */
-#ifdef HAVE_SSE_REGS
-#define REGISTER_BYTES \
- (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS)
-#else
+/* First FPU data register. */
#ifdef HAVE_I387_REGS
-#define REGISTER_BYTES (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS)
+#define FP0_REGNUM 16
#else
-#define REGISTER_BYTES (SIZEOF_GREGS)
+#define FP0_REGNUM 0
#endif
-#endif
-
-/* Index within `registers' of the first byte of the space for register N. */
-#define REGISTER_BYTE(n) (i386_register_byte[(n)])
-extern int i386_register_byte[];
-
-/* Number of bytes of storage in the actual machine representation for
- register N. */
-#define REGISTER_RAW_SIZE(n) (i386_register_raw_size[(n)])
-extern int i386_register_raw_size[];
+\f
/* Largest value REGISTER_RAW_SIZE can have. */
#define MAX_REGISTER_RAW_SIZE 16
-/* Number of bytes of storage in the program's representation
- for register N. */
-#define REGISTER_VIRTUAL_SIZE(n) (i386_register_virtual_size[(n)])
-extern int i386_register_virtual_size[];
+/* Return the size in bytes of the virtual type of register REG. */
+#define REGISTER_VIRTUAL_SIZE(reg) i386_register_virtual_size ((reg))
+extern int i386_register_virtual_size (int reg);
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
#define MAX_REGISTER_VIRTUAL_SIZE 16
-/* Return the GDB type object for the "standard" data type of data in
- register N. Perhaps si and di should go here, but potentially they
- could be used for things other than address. */
+/* Return the GDB type object for the "standard" data type of data in
+ register REGNUM. */
+
+#define REGISTER_VIRTUAL_TYPE(regnum) i386_register_virtual_type (regnum)
+extern struct type *i386_register_virtual_type (int regnum);
-#define REGISTER_VIRTUAL_TYPE(N) \
- (((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM) \
- ? lookup_pointer_type (builtin_type_void) \
- : IS_FP_REGNUM(N) ? builtin_type_long_double \
- : IS_SSE_REGNUM(N) ? builtin_type_v4sf \
- : builtin_type_int)
+/* Return true iff register REGNUM's virtual format is different from
+ its raw format. */
-/* REGISTER_CONVERTIBLE(N) is true iff register N's virtual format is
- different from its raw format. Note that this definition assumes
- that the host supports IEEE 32-bit floats, since it doesn't say
- that SSE registers need conversion. Even if we can't find a
- counterexample, this is still sloppy. */
-#define REGISTER_CONVERTIBLE(n) (IS_FP_REGNUM (n))
+#define REGISTER_CONVERTIBLE(regnum) i386_register_convertible (regnum)
+extern int i386_register_convertible (int regnum);
/* Convert data from raw format for register REGNUM in buffer FROM to
virtual format with type TYPE in buffer TO. */
#define REGISTER_CONVERT_TO_VIRTUAL(regnum, type, from, to) \
- i386_register_convert_to_virtual ((regnum), (type), (from), (to));
+ i386_register_convert_to_virtual ((regnum), (type), (from), (to))
extern void i386_register_convert_to_virtual (int regnum, struct type *type,
char *from, char *to);
raw format for register REGNUM in buffer TO. */
#define REGISTER_CONVERT_TO_RAW(type, regnum, from, to) \
- i386_register_convert_to_raw ((type), (regnum), (from), (to));
+ i386_register_convert_to_raw ((type), (regnum), (from), (to))
extern void i386_register_convert_to_raw (struct type *type, int regnum,
char *from, char *to);
extern void i387_float_info (void);
#define FLOAT_INFO { i387_float_info (); }
#endif
-
\f
+
+#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
+ i386_push_arguments ((nargs), (args), (sp), (struct_return), (struct_addr))
+extern CORE_ADDR i386_push_arguments (int nargs, struct value **args,
+ CORE_ADDR sp, int struct_return,
+ CORE_ADDR struct_addr);
+
/* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
+ subroutine will return. This is called from call_function. */
-#define STORE_STRUCT_RETURN(ADDR, SP) \
- { char buf[REGISTER_SIZE]; \
- (SP) -= sizeof (ADDR); \
- store_address (buf, sizeof (ADDR), ADDR); \
- write_memory ((SP), buf, sizeof (ADDR)); }
+#define STORE_STRUCT_RETURN(addr, sp) \
+ i386_store_struct_return ((addr), (sp))
+extern void i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
extern void i386_extract_return_value (struct type *type, char *regbuf,
char *valbuf);
-/* Write into appropriate registers a function return value of type TYPE, given
- in virtual format. */
-
-#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- { \
- if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), (VALBUF), \
- TYPE_LENGTH (TYPE)); \
- else \
- write_register_bytes (0, (VALBUF), TYPE_LENGTH (TYPE)); \
- }
-
-/* Extract from an array REGBUF containing the (raw) register state the address
- in which a function should return its structure value, as a CORE_ADDR (or an
- expression that can be used as one). */
+/* Write into the appropriate registers a function return value stored
+ in VALBUF of type TYPE, given in virtual format. */
-#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
+#define STORE_RETURN_VALUE(type, valbuf) \
+ i386_store_return_value ((type), (valbuf))
+extern void i386_store_return_value (struct type *type, char *valbuf);
-/* The following redefines make backtracing through sigtramp work.
- They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
- from the sigcontext structure which is pushed by the kernel on the
- user stack, along with a pointer to it. */
-
-/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
- chain-pointer.
- In the case of the i386, the frame's nominal address
- is the address of a 4-byte word containing the calling frame's address. */
-
-#define FRAME_CHAIN(thisframe) \
- ((thisframe)->signal_handler_caller \
- ? (thisframe)->frame \
- : (!inside_entry_file ((thisframe)->pc) \
- ? read_memory_integer ((thisframe)->frame, 4) \
- : 0))
-
-/* A macro that tells us whether the function invocation represented
- by FI does not have a frame on the stack associated with it. If it
- does not, FRAMELESS is set to 1, else 0. */
-
-#define FRAMELESS_FUNCTION_INVOCATION(FI) \
- (((FI)->signal_handler_caller) ? 0 : frameless_look_for_prologue(FI))
+/* Extract from an array REGBUF containing the (raw) register state
+ the address in which a function should return its structure value,
+ as a CORE_ADDR. */
-/* Saved Pc. Get it from sigcontext if within sigtramp. */
+#define EXTRACT_STRUCT_VALUE_ADDRESS(regbuf) \
+ i386_extract_struct_value_address ((regbuf))
+extern CORE_ADDR i386_extract_struct_value_address (char *regbuf);
-#define FRAME_SAVED_PC(FRAME) \
- (((FRAME)->signal_handler_caller \
- ? sigtramp_saved_pc (FRAME) \
- : read_memory_integer ((FRAME)->frame + 4, 4)) \
- )
+/* Determine whether the function invocation represented by FRAME does
+ not have a from on the stack associated with it. If it does not,
+ return non-zero, otherwise return zero. */
-extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
+#define FRAMELESS_FUNCTION_INVOCATION(frame) \
+ i386_frameless_function_invocation (frame)
+extern int i386_frameless_function_invocation (struct frame_info *frame);
#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
#define FRAME_NUM_ARGS(fi) (i386_frame_num_args(fi))
-extern int i386_frame_num_args PARAMS ((struct frame_info *));
+extern int i386_frame_num_args (struct frame_info *);
/* Return number of bytes at start of arglist that are not really args. */
ways in the stack frame. sp is even more special:
the address we return for it IS the sp for the next frame. */
-extern void i386_frame_init_saved_regs PARAMS ((struct frame_info *));
+extern void i386_frame_init_saved_regs (struct frame_info *);
#define FRAME_INIT_SAVED_REGS(FI) i386_frame_init_saved_regs (FI)
\f
#define PUSH_DUMMY_FRAME { i386_push_dummy_frame (); }
-extern void i386_push_dummy_frame PARAMS ((void));
+extern void i386_push_dummy_frame (void);
/* Discard from the stack the innermost frame, restoring all registers. */
#define POP_FRAME { i386_pop_frame (); }
-extern void i386_pop_frame PARAMS ((void));
+extern void i386_pop_frame (void);
\f
/* this is
/* Insert the specified number of args and function address
into a call sequence of the above form stored at DUMMYNAME. */
-#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
-{ \
- int from, to, delta, loc; \
- loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH); \
- from = loc + 5; \
- to = (int)(fun); \
- delta = to - from; \
- *((char *)(dummyname) + 1) = (delta & 0xff); \
- *((char *)(dummyname) + 2) = ((delta >> 8) & 0xff); \
- *((char *)(dummyname) + 3) = ((delta >> 16) & 0xff); \
- *((char *)(dummyname) + 4) = ((delta >> 24) & 0xff); \
-}
-
-extern void print_387_control_word PARAMS ((unsigned int));
-extern void print_387_status_word PARAMS ((unsigned int));
+#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
+ i386_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
+extern void i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
+ int nargs, struct value **args,
+ struct type *type, int gcc_p);
+
+/* FIXME: kettenis/2000-06-12: These do not belong here. */
+extern void print_387_control_word (unsigned int);
+extern void print_387_status_word (unsigned int);
/* Offset from SP to first arg on stack at first instruction of a function */
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