1 /* Target machine sub-parameters for SPARC, for GDB, the GNU debugger.
2 This is included by other tm-*.h files to define SPARC cpu-related info.
3 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003
5 Free Software Foundation, Inc.
6 Contributed by Michael Tiemann (tiemann@mcc.com)
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
32 * The following enums are purely for the convenience of the GDB
33 * developer, when debugging GDB.
36 enum { /* Sparc general registers, for all sparc versions. */
37 G0_REGNUM, G1_REGNUM, G2_REGNUM, G3_REGNUM,
38 G4_REGNUM, G5_REGNUM, G6_REGNUM, G7_REGNUM,
39 O0_REGNUM, O1_REGNUM, O2_REGNUM, O3_REGNUM,
40 O4_REGNUM, O5_REGNUM, O6_REGNUM, O7_REGNUM,
41 L0_REGNUM, L1_REGNUM, L2_REGNUM, L3_REGNUM,
42 L4_REGNUM, L5_REGNUM, L6_REGNUM, L7_REGNUM,
43 I0_REGNUM, I1_REGNUM, I2_REGNUM, I3_REGNUM,
44 I4_REGNUM, I5_REGNUM, I6_REGNUM, I7_REGNUM,
45 FP0_REGNUM /* Floating point register 0 */
48 enum { /* Sparc general registers, alternate names. */
49 R0_REGNUM, R1_REGNUM, R2_REGNUM, R3_REGNUM,
50 R4_REGNUM, R5_REGNUM, R6_REGNUM, R7_REGNUM,
51 R8_REGNUM, R9_REGNUM, R10_REGNUM, R11_REGNUM,
52 R12_REGNUM, R13_REGNUM, R14_REGNUM, R15_REGNUM,
53 R16_REGNUM, R17_REGNUM, R18_REGNUM, R19_REGNUM,
54 R20_REGNUM, R21_REGNUM, R22_REGNUM, R23_REGNUM,
55 R24_REGNUM, R25_REGNUM, R26_REGNUM, R27_REGNUM,
56 R28_REGNUM, R29_REGNUM, R30_REGNUM, R31_REGNUM
59 enum { /* Sparc32 control registers. */
60 PS_REGNUM = 65, /* PC, NPC, and Y are omitted because */
61 WIM_REGNUM = 66, /* they have different values depending on */
62 TBR_REGNUM = 67, /* 32-bit / 64-bit mode. */
67 /* v9 misc. and priv. regs */
69 /* Note: specifying values explicitly for documentation purposes. */
70 enum { /* Sparc64 control registers, excluding Y, PC, and NPC. */
71 CCR_REGNUM = 82, /* Condition Code Register (%xcc,%icc) */
72 FSR_REGNUM = 83, /* Floating Point State */
73 FPRS_REGNUM = 84, /* Floating Point Registers State */
74 ASI_REGNUM = 86, /* Alternate Space Identifier */
75 VER_REGNUM = 87, /* Version register */
76 TICK_REGNUM = 88, /* Tick register */
77 PIL_REGNUM = 89, /* Processor Interrupt Level */
78 PSTATE_REGNUM = 90, /* Processor State */
79 TSTATE_REGNUM = 91, /* Trap State */
80 TBA_REGNUM = 92, /* Trap Base Address */
81 TL_REGNUM = 93, /* Trap Level */
82 TT_REGNUM = 94, /* Trap Type */
83 TPC_REGNUM = 95, /* Trap pc */
84 TNPC_REGNUM = 96, /* Trap npc */
85 WSTATE_REGNUM = 97, /* Window State */
86 CWP_REGNUM = 98, /* Current Window Pointer */
87 CANSAVE_REGNUM = 99, /* Savable Windows */
88 CANRESTORE_REGNUM = 100, /* Restorable Windows */
89 CLEANWIN_REGNUM = 101, /* Clean Windows */
90 OTHERWIN_REGNUM = 102, /* Other Windows */
91 ASR16_REGNUM = 103, /* Ancillary State Registers */
107 ICC_REGNUM = 119, /* 32 bit condition codes */
108 XCC_REGNUM = 120, /* 64 bit condition codes */
109 FCC0_REGNUM = 121, /* fp cc reg 0 */
110 FCC1_REGNUM = 122, /* fp cc reg 1 */
111 FCC2_REGNUM = 123, /* fp cc reg 2 */
112 FCC3_REGNUM = 124 /* fp cc reg 3 */
116 * Make sparc target multi-archable: April 2000
119 /* Multi-arch definition of TARGET_IS_SPARC64, TARGET_ELF64 */
120 #undef GDB_TARGET_IS_SPARC64
121 #define GDB_TARGET_IS_SPARC64 \
122 (sparc_intreg_size () == 8)
124 #define TARGET_ELF64 \
125 (sparc_intreg_size () == 8)
126 extern int sparc_intreg_size (void);
129 * The following defines should ONLY appear for MULTI_ARCH.
132 /* Multi-arch the nPC and Y registers. */
133 #define Y_REGNUM (sparc_y_regnum ())
135 /* On the Sun 4 under SunOS, the compile will leave a fake insn which
136 encodes the structure size being returned. If we detect such
137 a fake insn, step past it. */
139 #define PC_ADJUST(PC) sparc_pc_adjust (PC)
140 extern CORE_ADDR sparc_pc_adjust (CORE_ADDR);
142 /* If an argument is declared "register", Sun cc will keep it in a register,
143 never saving it onto the stack. So we better not believe the "p" symbol
146 #define DEPRECATE_USE_REGISTER_NOT_ARG
148 /* For acc, there's no need to correct LBRAC entries by guessing how
149 they should work. In fact, this is harmful because the LBRAC
150 entries now all appear at the end of the function, not intermixed
151 with the SLINE entries. n_opt_found detects acc for Solaris binaries;
152 function_stab_type detects acc for SunOS4 binaries.
154 For binary from SunOS4 /bin/cc, need to correct LBRAC's.
156 For gcc, like acc, don't correct. */
158 #define SUN_FIXED_LBRAC_BUG \
160 || function_stab_type == N_STSYM \
161 || function_stab_type == N_GSYM \
162 || processing_gcc_compilation)
164 /* Do variables in the debug stabs occur after the N_LBRAC or before it?
165 acc: after, gcc: before, SunOS4 /bin/cc: before. */
167 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \
170 || function_stab_type == N_STSYM \
171 || function_stab_type == N_GSYM))
173 /* Sequence of bytes for breakpoint instruction (ta 1). */
175 extern const unsigned char *sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len);
176 #define BREAKPOINT_FROM_PC(PC,LEN) sparc_breakpoint_from_pc ((PC), (LEN))
178 /* Register numbers of various important registers.
179 Note that some of these values are "real" register numbers,
180 and correspond to the general registers of the machine,
181 and some are "phony" register numbers which are too large
182 to be actual register numbers as far as the user is concerned
183 but do serve to get the desired values when passed to read_register. */
185 #define G0_REGNUM 0 /* %g0 */
186 #define G1_REGNUM 1 /* %g1 */
187 #define O0_REGNUM 8 /* %o0 */
188 #define RP_REGNUM 15 /* Contains return address value, *before* \
189 any windows get switched. */
190 #define O7_REGNUM 15 /* Last local reg not saved on stack frame */
191 #define L0_REGNUM 16 /* First local reg that's saved on stack frame
192 rather than in machine registers */
193 #define I0_REGNUM 24 /* %i0 */
194 #define I7_REGNUM 31 /* Last local reg saved on stack frame */
195 #define PS_REGNUM 65 /* Contains processor status */
196 #define PS_FLAG_CARRY 0x100000 /* Carry bit in PS */
197 #define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */
198 #define TBR_REGNUM 67 /* Trap Base Register (not really supported) */
199 #define FPS_REGNUM 70 /* Floating point status register */
200 #define CPS_REGNUM 71 /* Coprocessor status register */
202 /* Writing to %g0 is a noop (not an error or exception or anything like
205 #define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM)
207 #define DEPRECATED_PRINT_EXTRA_FRAME_INFO(FI) \
208 sparc_print_extra_frame_info (FI)
209 extern void sparc_print_extra_frame_info (struct frame_info *);
211 /* DEPRECATED_INIT_EXTRA_FRAME_INFO needs the PC to detect flat
214 #define DEPRECATED_INIT_FRAME_PC_FIRST(FROMLEAF, PREV) \
215 ((FROMLEAF) ? DEPRECATED_SAVED_PC_AFTER_CALL ((PREV)->next) : \
216 (PREV)->next ? DEPRECATED_FRAME_SAVED_PC ((PREV)->next) : read_pc ())
218 /* Define other aspects of the stack frame. */
220 /* The location of I0 w.r.t SP. This is actually dependent on how the
221 system's window overflow/underflow routines are written. Most
222 vendors save the L regs followed by the I regs (at the higher
223 address). Some vendors get it wrong. */
225 #define FRAME_SAVED_L0 0
226 #define FRAME_SAVED_I0 (8 * DEPRECATED_REGISTER_RAW_SIZE (L0_REGNUM))
228 /* Things needed for making the inferior call functions. */
230 * First of all, let me give my opinion of what the DUMMY_FRAME
231 * actually looks like.
235 * + - - - - - - - - - - - - - - - - +<-- fp (level 0)
240 * | Frame of innermost program |
247 * |---------------------------------|<-- sp (level 0), fp (c)
251 * | ------ |<-- fp - 0x80
252 * FRAME | g0-7 |<-- fp - 0xa0
253 * | i0-7 |<-- fp - 0xc0
254 * | other |<-- fp - 0xe0
257 * |---------------------------------|<-- sp' = fp - 0x140
260 * sp' + 0x94 -->| CALL_DUMMY (x code) |
263 * |---------------------------------|<-- sp'' = fp - 0x200
264 * | align sp to 8 byte boundary |
265 * | ==> args to fn <== |
267 * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44|
268 * |---------------------------------|<-- final sp (variable)
270 * | Where function called will |
275 * I understand everything in this picture except what the space
276 * between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't
277 * understand why there's a large chunk of CALL_DUMMY that never gets
278 * executed (its function is superceeded by
279 * DEPRECATED_PUSH_DUMMY_FRAME; they are designed to do the same
282 * DEPRECATED_PUSH_DUMMY_FRAME saves the registers above sp' and
283 * pushes the * register file stack down one.
285 * call_function then writes CALL_DUMMY, pushes the args onto the
286 * stack, and adjusts the stack pointer.
288 call_function_by_hand then starts execution (in the middle of
289 CALL_DUMMY, as directed by call_function). */
292 /* This sequence of words is the instructions
294 00: bc 10 00 01 mov %g1, %fp
295 04: 9d e3 80 00 save %sp, %g0, %sp
296 08: bc 10 00 02 mov %g2, %fp
297 0c: be 10 00 03 mov %g3, %i7
298 10: da 03 a0 58 ld [ %sp + 0x58 ], %o5
299 14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4
300 18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3
301 1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2
302 20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1
303 24: 40 00 00 00 call <fun>
304 28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0
310 * the first four instructions are necessary only on the simulator.
311 * this is a multiple of 8 (not only 4) bytes.
312 * the `call' insn is a relative, not an absolute call.
313 * the `nop' at the end is needed to keep the trap from
314 clobbering things (if NPC pointed to garbage instead).
317 #endif /* CALL_DUMMY */
319 /* Sparc has no reliable single step ptrace call */
321 #define SOFTWARE_SINGLE_STEP_P() 1
322 extern void sparc_software_single_step (enum target_signal, int);
323 #define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p)
325 /* We need more arguments in a frame specification for the
326 "frame" or "info frame" command. */
328 #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
329 extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *);
331 extern void sparc_do_registers_info (int regnum, int all);
332 #undef DEPRECATED_DO_REGISTERS_INFO
333 #define DEPRECATED_DO_REGISTERS_INFO(REGNUM,ALL) sparc_do_registers_info (REGNUM, ALL)
335 /* Optimization for storing registers to the inferior. The hook
337 actually executes any deferred stores. It is called any time
338 we are going to proceed the child, or read its registers.
339 The hook CLEAR_DEFERRED_STORES is called when we want to throw
340 away the inferior process, e.g. when it dies or we kill it.
341 FIXME, this does not handle remote debugging cleanly. */
343 extern int deferred_stores;
344 #define DO_DEFERRED_STORES \
345 if (deferred_stores) \
346 target_store_registers (-2);
347 #define CLEAR_DEFERRED_STORES \
350 /* Select the sparc disassembler */
352 #define TM_PRINT_INSN_MACH bfd_mach_sparc
354 #define DEPRECATED_EXTRA_STACK_ALIGNMENT_NEEDED 1