1 /* Macro definitions for GDB on an Intel i[345]86.
2 Copyright 1995, 1996, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
29 /* Forward declarations for prototypes. */
31 struct frame_saved_regs;
35 /* Number of traps that happen between exec'ing the shell to run an
36 inferior, and when we finally get to the inferior code. This is 2
37 on most implementations. */
39 #define START_INFERIOR_TRAPS_EXPECTED 2
41 /* Offset from address of function to start of its code.
42 Zero on most machines. */
44 #define FUNCTION_START_OFFSET 0
46 /* Advance PC across any function entry prologue instructions to reach some
49 #define SKIP_PROLOGUE(frompc) (i386_skip_prologue (frompc))
51 extern int i386_skip_prologue (int);
53 /* Stack grows downward. */
55 #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
57 /* Sequence of bytes for breakpoint instruction. */
59 #define BREAKPOINT {0xcc}
61 /* Amount PC must be decremented by after a breakpoint. This is often the
62 number of bytes in BREAKPOINT but not always. */
64 #define DECR_PC_AFTER_BREAK 1
66 /* Say how long (ordinary) registers are. This is a piece of bogosity
67 used in push_word and a few other places; REGISTER_RAW_SIZE is the
68 real way to know how big a register is. */
70 #define REGISTER_SIZE 4
72 /* This register file is parameterized by two macros:
73 HAVE_I387_REGS --- register file should include i387 registers
74 HAVE_SSE_REGS --- register file should include SSE registers
75 If HAVE_SSE_REGS is #defined, then HAVE_I387_REGS must also be #defined.
77 However, GDB code should not test those macros with #ifdef, since
78 that makes code which is annoying to multi-arch. Instead, GDB code
79 should check the values of NUM_GREGS, NUM_FREGS, and NUM_SSE_REGS,
80 which will eventually get mapped onto architecture vector entries.
82 It's okay to use the macros in tm-*.h files, though, since those
83 files will get completely replaced when we multi-arch anyway. */
85 /* Number of general registers, present on every 32-bit x86 variant. */
86 #define NUM_GREGS (16)
88 /* Number of floating-point unit registers. */
90 #define NUM_FREGS (16)
95 /* Number of SSE registers. */
97 #define NUM_SSE_REGS (9)
99 #define NUM_SSE_REGS (0)
102 /* Largest number of registers we could have in any configuration. */
103 #define MAX_NUM_REGS (16 + 16 + 9 + 1)
105 /* Register numbers of various important registers.
106 Note that some of these values are "real" register numbers,
107 and correspond to the general registers of the machine,
108 and some are "phony" register numbers which are too large
109 to be actual register numbers as far as the user is concerned
110 but do serve to get the desired values when passed to read_register. */
112 #define FP_REGNUM 5 /* (ebp) Contains address of executing stack
114 #define SP_REGNUM 4 /* (usp) Contains address of top of stack */
115 #define PC_REGNUM 8 /* (eip) Contains program counter */
116 #define PS_REGNUM 9 /* (ps) Contains processor status */
118 /* First FPU data register. */
119 #ifdef HAVE_I387_REGS
120 #define FP0_REGNUM 16
126 /* Largest value REGISTER_RAW_SIZE can have. */
127 #define MAX_REGISTER_RAW_SIZE 16
129 /* Return the size in bytes of the virtual type of register REG. */
130 #define REGISTER_VIRTUAL_SIZE(reg) i386_register_virtual_size ((reg))
131 extern int i386_register_virtual_size (int reg);
133 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
134 #define MAX_REGISTER_VIRTUAL_SIZE 16
136 /* Return the GDB type object for the "standard" data type of data in
139 #define REGISTER_VIRTUAL_TYPE(regnum) i386_register_virtual_type (regnum)
140 extern struct type *i386_register_virtual_type (int regnum);
142 /* Return true iff register REGNUM's virtual format is different from
145 #define REGISTER_CONVERTIBLE(regnum) i386_register_convertible (regnum)
146 extern int i386_register_convertible (int regnum);
148 /* Convert data from raw format for register REGNUM in buffer FROM to
149 virtual format with type TYPE in buffer TO. */
151 #define REGISTER_CONVERT_TO_VIRTUAL(regnum, type, from, to) \
152 i386_register_convert_to_virtual ((regnum), (type), (from), (to))
153 extern void i386_register_convert_to_virtual (int regnum, struct type *type,
154 char *from, char *to);
156 /* Convert data from virtual format with type TYPE in buffer FROM to
157 raw format for register REGNUM in buffer TO. */
159 #define REGISTER_CONVERT_TO_RAW(type, regnum, from, to) \
160 i386_register_convert_to_raw ((type), (regnum), (from), (to))
161 extern void i386_register_convert_to_raw (struct type *type, int regnum,
162 char *from, char *to);
164 /* Print out the i387 floating point state. */
165 #ifdef HAVE_I387_REGS
166 extern void i387_float_info (void);
167 #define FLOAT_INFO { i387_float_info (); }
171 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
172 i386_push_arguments ((nargs), (args), (sp), (struct_return), (struct_addr))
173 extern CORE_ADDR i386_push_arguments (int nargs, struct value **args,
174 CORE_ADDR sp, int struct_return,
175 CORE_ADDR struct_addr);
177 /* Store the address of the place in which to copy the structure the
178 subroutine will return. This is called from call_function. */
180 #define STORE_STRUCT_RETURN(addr, sp) \
181 i386_store_struct_return ((addr), (sp))
182 extern void i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp);
184 /* Extract from an array REGBUF containing the (raw) register state
185 a function return value of type TYPE, and copy that, in virtual format,
188 #define EXTRACT_RETURN_VALUE(type, regbuf, valbuf) \
189 i386_extract_return_value ((type), (regbuf), (valbuf))
190 extern void i386_extract_return_value (struct type *type, char *regbuf,
193 /* Write into the appropriate registers a function return value stored
194 in VALBUF of type TYPE, given in virtual format. */
196 #define STORE_RETURN_VALUE(type, valbuf) \
197 i386_store_return_value ((type), (valbuf))
198 extern void i386_store_return_value (struct type *type, char *valbuf);
200 /* Extract from an array REGBUF containing the (raw) register state
201 the address in which a function should return its structure value,
204 #define EXTRACT_STRUCT_VALUE_ADDRESS(regbuf) \
205 i386_extract_struct_value_address ((regbuf))
206 extern CORE_ADDR i386_extract_struct_value_address (char *regbuf);
208 /* Determine whether the function invocation represented by FRAME does
209 not have a from on the stack associated with it. If it does not,
210 return non-zero, otherwise return zero. */
212 #define FRAMELESS_FUNCTION_INVOCATION(frame) \
213 i386_frameless_function_invocation (frame)
214 extern int i386_frameless_function_invocation (struct frame_info *frame);
216 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
218 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
220 /* Return number of args passed to a frame. Can return -1, meaning no way
221 to tell, which is typical now that the C compiler delays popping them. */
223 #define FRAME_NUM_ARGS(fi) (i386_frame_num_args(fi))
225 extern int i386_frame_num_args (struct frame_info *);
227 /* Return number of bytes at start of arglist that are not really args. */
229 #define FRAME_ARGS_SKIP 8
231 /* Put here the code to store, into a struct frame_saved_regs,
232 the addresses of the saved registers of frame described by FRAME_INFO.
233 This includes special registers such as pc and fp saved in special
234 ways in the stack frame. sp is even more special:
235 the address we return for it IS the sp for the next frame. */
237 extern void i386_frame_init_saved_regs (struct frame_info *);
238 #define FRAME_INIT_SAVED_REGS(FI) i386_frame_init_saved_regs (FI)
242 /* Things needed for making the inferior call functions. */
244 /* "An argument's size is increased, if necessary, to make it a
245 multiple of [32 bit] words. This may require tail padding,
246 depending on the size of the argument" - from the x86 ABI. */
247 #define PARM_BOUNDARY 32
249 /* Push an empty stack frame, to record the current PC, etc. */
251 #define PUSH_DUMMY_FRAME { i386_push_dummy_frame (); }
253 extern void i386_push_dummy_frame (void);
255 /* Discard from the stack the innermost frame, restoring all registers. */
257 #define POP_FRAME { i386_pop_frame (); }
259 extern void i386_pop_frame (void);
263 * call 11223344 (32 bit relative)
267 #define CALL_DUMMY { 0x223344e8, 0xcc11 }
269 #define CALL_DUMMY_LENGTH 8
271 #define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */
273 #define CALL_DUMMY_BREAKPOINT_OFFSET 5
275 /* Insert the specified number of args and function address
276 into a call sequence of the above form stored at DUMMYNAME. */
278 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
279 i386_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
280 extern void i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
281 int nargs, struct value **args,
282 struct type *type, int gcc_p);
284 /* FIXME: kettenis/2000-06-12: These do not belong here. */
285 extern void print_387_control_word (unsigned int);
286 extern void print_387_status_word (unsigned int);
288 /* Offset from SP to first arg on stack at first instruction of a function */
290 #define SP_ARG0 (1 * 4)
292 #endif /* ifndef TM_I386_H */