1 /* Target-dependent code for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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, Boston, MA 02111-1307, USA. */
30 #include "xcoffsolib.h"
34 /* Breakpoint shadows for the single step instructions will be kept here. */
36 static struct sstep_breaks
{
37 /* Address, or 0 if this is not in use. */
39 /* Shadow contents. */
43 /* Hook for determining the TOC address when calling functions in the
44 inferior under AIX. The initialization code in rs6000-nat.c sets
45 this hook to point to find_toc_address. */
47 CORE_ADDR (*find_toc_address_hook
) PARAMS ((CORE_ADDR
)) = NULL
;
49 /* Static function prototypes */
51 static CORE_ADDR branch_dest
PARAMS ((int opcode
, int instr
, CORE_ADDR pc
,
54 static void frame_get_saved_regs
PARAMS ((struct frame_info
*fi
,
55 struct rs6000_framedata
*fdatap
));
57 static void pop_dummy_frame
PARAMS ((void));
59 static CORE_ADDR frame_initial_stack_address
PARAMS ((struct frame_info
*));
62 rs6000_skip_prologue (pc
)
65 struct rs6000_framedata frame
;
66 pc
= skip_prologue (pc
, &frame
);
71 /* Fill in fi->saved_regs */
73 struct frame_extra_info
75 /* Functions calling alloca() change the value of the stack
76 pointer. We need to use initial stack pointer (which is saved in
77 r31 by gcc) in such cases. If a compiler emits traceback table,
78 then we should use the alloca register specified in traceback
80 CORE_ADDR initial_sp
; /* initial stack pointer. */
84 rs6000_init_extra_frame_info (fromleaf
, fi
)
86 struct frame_info
*fi
;
88 fi
->extra_info
= (struct frame_extra_info
*)
89 frame_obstack_alloc (sizeof (struct frame_extra_info
));
90 fi
->extra_info
->initial_sp
= 0;
91 if (fi
->next
!= (CORE_ADDR
) 0
92 && fi
->pc
< TEXT_SEGMENT_BASE
)
93 /* We're in get_prev_frame */
94 /* and this is a special signal frame. */
95 /* (fi->pc will be some low address in the kernel, */
96 /* to which the signal handler returns). */
97 fi
->signal_handler_caller
= 1;
102 rs6000_frame_init_saved_regs (fi
)
103 struct frame_info
*fi
;
105 frame_get_saved_regs (fi
, NULL
);
109 rs6000_frame_args_address (fi
)
110 struct frame_info
*fi
;
112 if (fi
->extra_info
->initial_sp
!= 0)
113 return fi
->extra_info
->initial_sp
;
115 return frame_initial_stack_address (fi
);
119 /* Calculate the destination of a branch/jump. Return -1 if not a branch. */
122 branch_dest (opcode
, instr
, pc
, safety
)
133 absolute
= (int) ((instr
>> 1) & 1);
137 immediate
= ((instr
& ~3) << 6) >> 6; /* br unconditional */
141 dest
= pc
+ immediate
;
145 immediate
= ((instr
& ~3) << 16) >> 16; /* br conditional */
149 dest
= pc
+ immediate
;
153 ext_op
= (instr
>>1) & 0x3ff;
155 if (ext_op
== 16) /* br conditional register */
157 dest
= read_register (LR_REGNUM
) & ~3;
159 /* If we are about to return from a signal handler, dest is
160 something like 0x3c90. The current frame is a signal handler
161 caller frame, upon completion of the sigreturn system call
162 execution will return to the saved PC in the frame. */
163 if (dest
< TEXT_SEGMENT_BASE
)
165 struct frame_info
*fi
;
167 fi
= get_current_frame ();
169 dest
= read_memory_integer (fi
->frame
+ SIG_FRAME_PC_OFFSET
,
174 else if (ext_op
== 528) /* br cond to count reg */
176 dest
= read_register (CTR_REGNUM
) & ~3;
178 /* If we are about to execute a system call, dest is something
179 like 0x22fc or 0x3b00. Upon completion the system call
180 will return to the address in the link register. */
181 if (dest
< TEXT_SEGMENT_BASE
)
182 dest
= read_register (LR_REGNUM
) & ~3;
189 return (dest
< TEXT_SEGMENT_BASE
) ? safety
: dest
;
193 /* Sequence of bytes for breakpoint instruction. */
195 #define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
196 #define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
199 rs6000_breakpoint_from_pc (bp_addr
, bp_size
)
203 static unsigned char big_breakpoint
[] = BIG_BREAKPOINT
;
204 static unsigned char little_breakpoint
[] = LITTLE_BREAKPOINT
;
206 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
207 return big_breakpoint
;
209 return little_breakpoint
;
213 /* AIX does not support PT_STEP. Simulate it. */
216 rs6000_software_single_step (signal
, insert_breakpoints_p
)
218 int insert_breakpoints_p
;
220 #define INSNLEN(OPCODE) 4
222 static char le_breakp
[] = LITTLE_BREAKPOINT
;
223 static char be_breakp
[] = BIG_BREAKPOINT
;
224 char *breakp
= TARGET_BYTE_ORDER
== BIG_ENDIAN
? be_breakp
: le_breakp
;
230 if (insert_breakpoints_p
) {
234 insn
= read_memory_integer (loc
, 4);
236 breaks
[0] = loc
+ INSNLEN(insn
);
238 breaks
[1] = branch_dest (opcode
, insn
, loc
, breaks
[0]);
240 /* Don't put two breakpoints on the same address. */
241 if (breaks
[1] == breaks
[0])
244 stepBreaks
[1].address
= 0;
246 for (ii
=0; ii
< 2; ++ii
) {
248 /* ignore invalid breakpoint. */
249 if ( breaks
[ii
] == -1)
252 read_memory (breaks
[ii
], stepBreaks
[ii
].data
, 4);
254 write_memory (breaks
[ii
], breakp
, 4);
255 stepBreaks
[ii
].address
= breaks
[ii
];
260 /* remove step breakpoints. */
261 for (ii
=0; ii
< 2; ++ii
)
262 if (stepBreaks
[ii
].address
!= 0)
264 (stepBreaks
[ii
].address
, stepBreaks
[ii
].data
, 4);
267 errno
= 0; /* FIXME, don't ignore errors! */
268 /* What errors? {read,write}_memory call error(). */
272 /* return pc value after skipping a function prologue and also return
273 information about a function frame.
275 in struct rs6000_framedata fdata:
276 - frameless is TRUE, if function does not have a frame.
277 - nosavedpc is TRUE, if function does not save %pc value in its frame.
278 - offset is the initial size of this stack frame --- the amount by
279 which we decrement the sp to allocate the frame.
280 - saved_gpr is the number of the first saved gpr.
281 - saved_fpr is the number of the first saved fpr.
282 - alloca_reg is the number of the register used for alloca() handling.
284 - gpr_offset is the offset of the first saved gpr from the previous frame.
285 - fpr_offset is the offset of the first saved fpr from the previous frame.
286 - lr_offset is the offset of the saved lr
287 - cr_offset is the offset of the saved cr
290 #define SIGNED_SHORT(x) \
291 ((sizeof (short) == 2) \
292 ? ((int)(short)(x)) \
293 : ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000)))
295 #define GET_SRC_REG(x) (((x) >> 21) & 0x1f)
298 skip_prologue (pc
, fdata
)
300 struct rs6000_framedata
*fdata
;
302 CORE_ADDR orig_pc
= pc
;
310 int minimal_toc_loaded
= 0;
311 static struct rs6000_framedata zero_frame
;
314 fdata
->saved_gpr
= -1;
315 fdata
->saved_fpr
= -1;
316 fdata
->alloca_reg
= -1;
317 fdata
->frameless
= 1;
318 fdata
->nosavedpc
= 1;
320 if (target_read_memory (pc
, buf
, 4))
321 return pc
; /* Can't access it -- assume no prologue. */
323 /* Assume that subsequent fetches can fail with low probability. */
328 op
= read_memory_integer (pc
, 4);
330 if ((op
& 0xfc1fffff) == 0x7c0802a6) { /* mflr Rx */
331 lr_reg
= (op
& 0x03e00000) | 0x90010000;
334 } else if ((op
& 0xfc1fffff) == 0x7c000026) { /* mfcr Rx */
335 cr_reg
= (op
& 0x03e00000) | 0x90010000;
338 } else if ((op
& 0xfc1f0000) == 0xd8010000) { /* stfd Rx,NUM(r1) */
339 reg
= GET_SRC_REG (op
);
340 if (fdata
->saved_fpr
== -1 || fdata
->saved_fpr
> reg
) {
341 fdata
->saved_fpr
= reg
;
342 fdata
->fpr_offset
= SIGNED_SHORT (op
) + offset
;
346 } else if (((op
& 0xfc1f0000) == 0xbc010000) || /* stm Rx, NUM(r1) */
347 ((op
& 0xfc1f0000) == 0x90010000 && /* st rx,NUM(r1),
349 (op
& 0x03e00000) >= 0x01a00000)) {
351 reg
= GET_SRC_REG (op
);
352 if (fdata
->saved_gpr
== -1 || fdata
->saved_gpr
> reg
) {
353 fdata
->saved_gpr
= reg
;
354 fdata
->gpr_offset
= SIGNED_SHORT (op
) + offset
;
358 } else if ((op
& 0xffff0000) == 0x3c000000) { /* addis 0,0,NUM, used
360 fdata
->offset
= (op
& 0x0000ffff) << 16;
361 fdata
->frameless
= 0;
364 } else if ((op
& 0xffff0000) == 0x60000000) { /* ori 0,0,NUM, 2nd ha
365 lf of >= 32k frames */
366 fdata
->offset
|= (op
& 0x0000ffff);
367 fdata
->frameless
= 0;
370 } else if ((op
& 0xffff0000) == lr_reg
) { /* st Rx,NUM(r1)
372 fdata
->lr_offset
= SIGNED_SHORT (op
) + offset
;
373 fdata
->nosavedpc
= 0;
377 } else if ((op
& 0xffff0000) == cr_reg
) { /* st Rx,NUM(r1)
379 fdata
->cr_offset
= SIGNED_SHORT (op
) + offset
;
383 } else if (op
== 0x48000005) { /* bl .+4 used in
387 } else if (op
== 0x48000004) { /* b .+4 (xlc) */
390 } else if (((op
& 0xffff0000) == 0x801e0000 || /* lwz 0,NUM(r30), used
391 in V.4 -mrelocatable */
392 op
== 0x7fc0f214) && /* add r30,r0,r30, used
393 in V.4 -mrelocatable */
394 lr_reg
== 0x901e0000) {
397 } else if ((op
& 0xffff0000) == 0x3fc00000 || /* addis 30,0,foo@ha, used
398 in V.4 -mminimal-toc */
399 (op
& 0xffff0000) == 0x3bde0000) { /* addi 30,30,foo@l */
402 } else if ((op
& 0xfc000000) == 0x48000000) { /* bl foo,
405 fdata
->frameless
= 0;
406 /* Don't skip over the subroutine call if it is not within the first
407 three instructions of the prologue. */
408 if ((pc
- orig_pc
) > 8)
411 op
= read_memory_integer (pc
+4, 4);
413 /* At this point, make sure this is not a trampoline function
414 (a function that simply calls another functions, and nothing else).
415 If the next is not a nop, this branch was part of the function
418 if (op
== 0x4def7b82 || op
== 0) /* crorc 15, 15, 15 */
419 break; /* don't skip over
423 /* update stack pointer */
424 } else if ((op
& 0xffff0000) == 0x94210000) { /* stu r1,NUM(r1) */
425 fdata
->frameless
= 0;
426 fdata
->offset
= SIGNED_SHORT (op
);
427 offset
= fdata
->offset
;
430 } else if (op
== 0x7c21016e) { /* stwux 1,1,0 */
431 fdata
->frameless
= 0;
432 offset
= fdata
->offset
;
435 /* Load up minimal toc pointer */
436 } else if ((op
>> 22) == 0x20f
437 && ! minimal_toc_loaded
) { /* l r31,... or l r30,... */
438 minimal_toc_loaded
= 1;
441 /* store parameters in stack */
442 } else if ((op
& 0xfc1f0000) == 0x90010000 || /* st rx,NUM(r1) */
443 (op
& 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
444 (op
& 0xfc1f0000) == 0xfc010000) { /* frsp, fp?,NUM(r1) */
447 /* store parameters in stack via frame pointer */
449 ((op
& 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r1) */
450 (op
& 0xfc1f0000) == 0xd81f0000 || /* stfd Rx,NUM(r1) */
451 (op
& 0xfc1f0000) == 0xfc1f0000)) { /* frsp, fp?,NUM(r1) */
454 /* Set up frame pointer */
455 } else if (op
== 0x603f0000 /* oril r31, r1, 0x0 */
456 || op
== 0x7c3f0b78) { /* mr r31, r1 */
457 fdata
->frameless
= 0;
459 fdata
->alloca_reg
= 31;
462 /* Another way to set up the frame pointer. */
463 } else if ((op
& 0xfc1fffff) == 0x38010000) { /* addi rX, r1, 0x0 */
464 fdata
->frameless
= 0;
466 fdata
->alloca_reg
= (op
& ~0x38010000) >> 21;
475 /* I have problems with skipping over __main() that I need to address
476 * sometime. Previously, I used to use misc_function_vector which
477 * didn't work as well as I wanted to be. -MGO */
479 /* If the first thing after skipping a prolog is a branch to a function,
480 this might be a call to an initializer in main(), introduced by gcc2.
481 We'd like to skip over it as well. Fortunately, xlc does some extra
482 work before calling a function right after a prologue, thus we can
483 single out such gcc2 behaviour. */
486 if ((op
& 0xfc000001) == 0x48000001) { /* bl foo, an initializer function? */
487 op
= read_memory_integer (pc
+4, 4);
489 if (op
== 0x4def7b82) { /* cror 0xf, 0xf, 0xf (nop) */
491 /* check and see if we are in main. If so, skip over this initializer
494 tmp
= find_pc_misc_function (pc
);
495 if (tmp
>= 0 && STREQ (misc_function_vector
[tmp
].name
, "main"))
501 fdata
->offset
= - fdata
->offset
;
506 /*************************************************************************
507 Support for creating pushind a dummy frame into the stack, and popping
509 *************************************************************************/
511 /* The total size of dummy frame is 436, which is;
516 and 24 extra bytes for the callee's link area. The last 24 bytes
517 for the link area might not be necessary, since it will be taken
518 care of by push_arguments(). */
520 #define DUMMY_FRAME_SIZE 436
522 #define DUMMY_FRAME_ADDR_SIZE 10
524 /* Make sure you initialize these in somewhere, in case gdb gives up what it
525 was debugging and starts debugging something else. FIXMEibm */
527 static int dummy_frame_count
= 0;
528 static int dummy_frame_size
= 0;
529 static CORE_ADDR
*dummy_frame_addr
= 0;
531 extern int stop_stack_dummy
;
533 /* push a dummy frame into stack, save all register. Currently we are saving
534 only gpr's and fpr's, which is not good enough! FIXMEmgo */
541 /* Same thing, target byte order. */
546 /* Same thing, target byte order. */
549 /* Needed to figure out where to save the dummy link area.
550 FIXME: There should be an easier way to do this, no? tiemann 9/9/95. */
551 struct rs6000_framedata fdata
;
555 target_fetch_registers (-1);
557 if (dummy_frame_count
>= dummy_frame_size
) {
558 dummy_frame_size
+= DUMMY_FRAME_ADDR_SIZE
;
559 if (dummy_frame_addr
)
560 dummy_frame_addr
= (CORE_ADDR
*) xrealloc
561 (dummy_frame_addr
, sizeof(CORE_ADDR
) * (dummy_frame_size
));
563 dummy_frame_addr
= (CORE_ADDR
*)
564 xmalloc (sizeof(CORE_ADDR
) * (dummy_frame_size
));
567 sp
= read_register(SP_REGNUM
);
568 pc
= read_register(PC_REGNUM
);
569 store_address (pc_targ
, 4, pc
);
571 skip_prologue (get_pc_function_start (pc
), &fdata
);
573 dummy_frame_addr
[dummy_frame_count
++] = sp
;
575 /* Be careful! If the stack pointer is not decremented first, then kernel
576 thinks he is free to use the space underneath it. And kernel actually
577 uses that area for IPC purposes when executing ptrace(2) calls. So
578 before writing register values into the new frame, decrement and update
579 %sp first in order to secure your frame. */
581 /* FIXME: We don't check if the stack really has this much space.
582 This is a problem on the ppc simulator (which only grants one page
583 (4096 bytes) by default. */
585 write_register (SP_REGNUM
, sp
-DUMMY_FRAME_SIZE
);
587 /* gdb relies on the state of current_frame. We'd better update it,
588 otherwise things like do_registers_info() wouldn't work properly! */
590 flush_cached_frames ();
592 /* save program counter in link register's space. */
593 write_memory (sp
+ (fdata
.lr_offset
? fdata
.lr_offset
: DEFAULT_LR_SAVE
),
596 /* save all floating point and general purpose registers here. */
599 for (ii
= 0; ii
< 32; ++ii
)
600 write_memory (sp
-8-(ii
*8), ®isters
[REGISTER_BYTE (31-ii
+FP0_REGNUM
)], 8);
603 for (ii
=1; ii
<=32; ++ii
)
604 write_memory (sp
-256-(ii
*4), ®isters
[REGISTER_BYTE (32-ii
)], 4);
606 /* so far, 32*2 + 32 words = 384 bytes have been written.
607 7 extra registers in our register set: pc, ps, cnd, lr, cnt, xer, mq */
609 for (ii
=1; ii
<= (LAST_UISA_SP_REGNUM
-FIRST_UISA_SP_REGNUM
+1); ++ii
) {
610 write_memory (sp
-384-(ii
*4),
611 ®isters
[REGISTER_BYTE (FPLAST_REGNUM
+ ii
)], 4);
614 /* Save sp or so called back chain right here. */
615 store_address (sp_targ
, 4, sp
);
616 write_memory (sp
-DUMMY_FRAME_SIZE
, sp_targ
, 4);
617 sp
-= DUMMY_FRAME_SIZE
;
619 /* And finally, this is the back chain. */
620 write_memory (sp
+8, pc_targ
, 4);
624 /* Pop a dummy frame.
626 In rs6000 when we push a dummy frame, we save all of the registers. This
627 is usually done before user calls a function explicitly.
629 After a dummy frame is pushed, some instructions are copied into stack,
630 and stack pointer is decremented even more. Since we don't have a frame
631 pointer to get back to the parent frame of the dummy, we start having
632 trouble poping it. Therefore, we keep a dummy frame stack, keeping
633 addresses of dummy frames as such. When poping happens and when we
634 detect that was a dummy frame, we pop it back to its parent by using
635 dummy frame stack (`dummy_frame_addr' array).
637 FIXME: This whole concept is broken. You should be able to detect
638 a dummy stack frame *on the user's stack itself*. When you do,
639 then you know the format of that stack frame -- including its
640 saved SP register! There should *not* be a separate stack in the
641 GDB process that keeps track of these dummy frames! -- gnu@cygnus.com Aug92
649 sp
= dummy_frame_addr
[--dummy_frame_count
];
651 /* restore all fpr's. */
652 for (ii
= 1; ii
<= 32; ++ii
)
653 read_memory (sp
-(ii
*8), ®isters
[REGISTER_BYTE (32-ii
+FP0_REGNUM
)], 8);
655 /* restore all gpr's */
656 for (ii
=1; ii
<= 32; ++ii
) {
657 read_memory (sp
-256-(ii
*4), ®isters
[REGISTER_BYTE (32-ii
)], 4);
660 /* restore the rest of the registers. */
661 for (ii
=1; ii
<=(LAST_UISA_SP_REGNUM
-FIRST_UISA_SP_REGNUM
+1); ++ii
)
662 read_memory (sp
-384-(ii
*4),
663 ®isters
[REGISTER_BYTE (FPLAST_REGNUM
+ ii
)], 4);
665 read_memory (sp
-(DUMMY_FRAME_SIZE
-8),
666 ®isters
[REGISTER_BYTE(PC_REGNUM
)], 4);
668 /* when a dummy frame was being pushed, we had to decrement %sp first, in
669 order to secure astack space. Thus, saved %sp (or %r1) value, is not the
670 one we should restore. Change it with the one we need. */
672 memcpy (®isters
[REGISTER_BYTE(FP_REGNUM
)], (char *) &sp
, sizeof (int));
674 /* Now we can restore all registers. */
676 target_store_registers (-1);
678 flush_cached_frames ();
682 /* pop the innermost frame, go back to the caller. */
687 CORE_ADDR pc
, lr
, sp
, prev_sp
; /* %pc, %lr, %sp */
688 struct rs6000_framedata fdata
;
689 struct frame_info
*frame
= get_current_frame ();
693 sp
= FRAME_FP (frame
);
695 if (stop_stack_dummy
)
697 if (USE_GENERIC_DUMMY_FRAMES
)
699 generic_pop_dummy_frame ();
700 flush_cached_frames ();
705 if (dummy_frame_count
)
711 /* Make sure that all registers are valid. */
712 read_register_bytes (0, NULL
, REGISTER_BYTES
);
714 /* figure out previous %pc value. If the function is frameless, it is
715 still in the link register, otherwise walk the frames and retrieve the
716 saved %pc value in the previous frame. */
718 addr
= get_pc_function_start (frame
->pc
);
719 (void) skip_prologue (addr
, &fdata
);
724 prev_sp
= read_memory_integer (sp
, 4);
725 if (fdata
.lr_offset
== 0)
726 lr
= read_register (LR_REGNUM
);
728 lr
= read_memory_integer (prev_sp
+ fdata
.lr_offset
, 4);
730 /* reset %pc value. */
731 write_register (PC_REGNUM
, lr
);
733 /* reset register values if any was saved earlier. */
735 if (fdata
.saved_gpr
!= -1)
737 addr
= prev_sp
+ fdata
.gpr_offset
;
738 for (ii
= fdata
.saved_gpr
; ii
<= 31; ++ii
) {
739 read_memory (addr
, ®isters
[REGISTER_BYTE (ii
)], 4);
744 if (fdata
.saved_fpr
!= -1)
746 addr
= prev_sp
+ fdata
.fpr_offset
;
747 for (ii
= fdata
.saved_fpr
; ii
<= 31; ++ii
) {
748 read_memory (addr
, ®isters
[REGISTER_BYTE (ii
+FP0_REGNUM
)], 8);
753 write_register (SP_REGNUM
, prev_sp
);
754 target_store_registers (-1);
755 flush_cached_frames ();
758 /* fixup the call sequence of a dummy function, with the real function address.
759 its argumets will be passed by gdb. */
762 rs6000_fix_call_dummy (dummyname
, pc
, fun
, nargs
, args
, type
, gcc_p
)
771 #define TOC_ADDR_OFFSET 20
772 #define TARGET_ADDR_OFFSET 28
775 CORE_ADDR target_addr
;
777 if (find_toc_address_hook
!= NULL
)
781 tocvalue
= (*find_toc_address_hook
) (fun
);
782 ii
= *(int*)((char*)dummyname
+ TOC_ADDR_OFFSET
);
783 ii
= (ii
& 0xffff0000) | (tocvalue
>> 16);
784 *(int*)((char*)dummyname
+ TOC_ADDR_OFFSET
) = ii
;
786 ii
= *(int*)((char*)dummyname
+ TOC_ADDR_OFFSET
+4);
787 ii
= (ii
& 0xffff0000) | (tocvalue
& 0x0000ffff);
788 *(int*)((char*)dummyname
+ TOC_ADDR_OFFSET
+4) = ii
;
792 ii
= *(int*)((char*)dummyname
+ TARGET_ADDR_OFFSET
);
793 ii
= (ii
& 0xffff0000) | (target_addr
>> 16);
794 *(int*)((char*)dummyname
+ TARGET_ADDR_OFFSET
) = ii
;
796 ii
= *(int*)((char*)dummyname
+ TARGET_ADDR_OFFSET
+4);
797 ii
= (ii
& 0xffff0000) | (target_addr
& 0x0000ffff);
798 *(int*)((char*)dummyname
+ TARGET_ADDR_OFFSET
+4) = ii
;
801 /* Pass the arguments in either registers, or in the stack. In RS6000,
802 the first eight words of the argument list (that might be less than
803 eight parameters if some parameters occupy more than one word) are
804 passed in r3..r11 registers. float and double parameters are
805 passed in fpr's, in addition to that. Rest of the parameters if any
806 are passed in user stack. There might be cases in which half of the
807 parameter is copied into registers, the other half is pushed into
810 If the function is returning a structure, then the return address is passed
811 in r3, then the first 7 words of the parameters can be passed in registers,
815 rs6000_push_arguments (nargs
, args
, sp
, struct_return
, struct_addr
)
820 CORE_ADDR struct_addr
;
824 int argno
; /* current argument number */
825 int argbytes
; /* current argument byte */
826 char tmp_buffer
[50];
827 int f_argno
= 0; /* current floating point argno */
834 if (!USE_GENERIC_DUMMY_FRAMES
)
836 if (dummy_frame_count
<= 0)
837 printf_unfiltered ("FATAL ERROR -push_arguments()! frame not found!!\n");
840 /* The first eight words of ther arguments are passed in registers. Copy
843 If the function is returning a `struct', then the first word (which
844 will be passed in r3) is used for struct return address. In that
845 case we should advance one word and start from r4 register to copy
848 ii
= struct_return
? 1 : 0;
851 effectively indirect call... gcc does...
853 return_val example( float, int);
856 float in fp0, int in r3
857 offset of stack on overflow 8/16
858 for varargs, must go by type.
860 float in r3&r4, int in r5
861 offset of stack on overflow different
863 return in r3 or f0. If no float, must study how gcc emulates floats;
864 pay attention to arg promotion.
865 User may have to cast\args to handle promotion correctly
866 since gdb won't know if prototype supplied or not.
869 for (argno
=0, argbytes
=0; argno
< nargs
&& ii
<8; ++ii
) {
872 type
= check_typedef (VALUE_TYPE (arg
));
873 len
= TYPE_LENGTH (type
);
875 if (TYPE_CODE (type
) == TYPE_CODE_FLT
) {
877 /* floating point arguments are passed in fpr's, as well as gpr's.
878 There are 13 fpr's reserved for passing parameters. At this point
879 there is no way we would run out of them. */
883 "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno
);
885 memcpy (®isters
[REGISTER_BYTE(FP0_REGNUM
+ 1 + f_argno
)],
886 VALUE_CONTENTS (arg
),
893 /* Argument takes more than one register. */
894 while (argbytes
< len
) {
895 memset (®isters
[REGISTER_BYTE(ii
+3)], 0, sizeof(int));
896 memcpy (®isters
[REGISTER_BYTE(ii
+3)],
897 ((char*)VALUE_CONTENTS (arg
))+argbytes
,
898 (len
- argbytes
) > 4 ? 4 : len
- argbytes
);
902 goto ran_out_of_registers_for_arguments
;
907 else { /* Argument can fit in one register. No problem. */
908 memset (®isters
[REGISTER_BYTE(ii
+3)], 0, sizeof(int));
909 memcpy (®isters
[REGISTER_BYTE(ii
+3)], VALUE_CONTENTS (arg
), len
);
914 ran_out_of_registers_for_arguments
:
916 if (USE_GENERIC_DUMMY_FRAMES
)
918 saved_sp
= read_sp ();
922 /* location for 8 parameters are always reserved. */
925 /* another six words for back chain, TOC register, link register, etc. */
929 /* if there are more arguments, allocate space for them in
930 the stack, then push them starting from the ninth one. */
932 if ((argno
< nargs
) || argbytes
) {
936 space
+= ((len
- argbytes
+ 3) & -4);
942 for (; jj
< nargs
; ++jj
) {
943 value_ptr val
= args
[jj
];
944 space
+= ((TYPE_LENGTH (VALUE_TYPE (val
))) + 3) & -4;
947 /* add location required for the rest of the parameters */
948 space
= (space
+ 7) & -8;
951 /* This is another instance we need to be concerned about securing our
952 stack space. If we write anything underneath %sp (r1), we might conflict
953 with the kernel who thinks he is free to use this area. So, update %sp
954 first before doing anything else. */
956 write_register (SP_REGNUM
, sp
);
958 /* if the last argument copied into the registers didn't fit there
959 completely, push the rest of it into stack. */
962 write_memory (sp
+24+(ii
*4),
963 ((char*)VALUE_CONTENTS (arg
))+argbytes
,
966 ii
+= ((len
- argbytes
+ 3) & -4) / 4;
969 /* push the rest of the arguments into stack. */
970 for (; argno
< nargs
; ++argno
) {
973 type
= check_typedef (VALUE_TYPE (arg
));
974 len
= TYPE_LENGTH (type
);
977 /* float types should be passed in fpr's, as well as in the stack. */
978 if (TYPE_CODE (type
) == TYPE_CODE_FLT
&& f_argno
< 13) {
982 "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno
);
984 memcpy (®isters
[REGISTER_BYTE(FP0_REGNUM
+ 1 + f_argno
)],
985 VALUE_CONTENTS (arg
),
990 write_memory (sp
+24+(ii
*4), (char *) VALUE_CONTENTS (arg
), len
);
991 ii
+= ((len
+ 3) & -4) / 4;
995 /* Secure stack areas first, before doing anything else. */
996 write_register (SP_REGNUM
, sp
);
998 if (!USE_GENERIC_DUMMY_FRAMES
)
1000 /* we want to copy 24 bytes of target's frame to dummy's frame,
1001 then set back chain to point to new frame. */
1003 saved_sp
= dummy_frame_addr
[dummy_frame_count
- 1];
1004 read_memory (saved_sp
, tmp_buffer
, 24);
1005 write_memory (sp
, tmp_buffer
, 24);
1008 /* set back chain properly */
1009 store_address (tmp_buffer
, 4, saved_sp
);
1010 write_memory (sp
, tmp_buffer
, 4);
1012 target_store_registers (-1);
1015 #ifdef ELF_OBJECT_FORMAT
1017 /* Function: ppc_push_return_address (pc, sp)
1018 Set up the return address for the inferior function call. */
1021 ppc_push_return_address (pc
, sp
)
1025 write_register (LR_REGNUM
, CALL_DUMMY_ADDRESS ());
1031 /* a given return value in `regbuf' with a type `valtype', extract and copy its
1032 value into `valbuf' */
1035 extract_return_value (valtype
, regbuf
, valbuf
)
1036 struct type
*valtype
;
1037 char regbuf
[REGISTER_BYTES
];
1042 if (TYPE_CODE (valtype
) == TYPE_CODE_FLT
) {
1044 double dd
; float ff
;
1045 /* floats and doubles are returned in fpr1. fpr's have a size of 8 bytes.
1046 We need to truncate the return value into float size (4 byte) if
1049 if (TYPE_LENGTH (valtype
) > 4) /* this is a double */
1051 ®buf
[REGISTER_BYTE (FP0_REGNUM
+ 1)],
1052 TYPE_LENGTH (valtype
));
1054 memcpy (&dd
, ®buf
[REGISTER_BYTE (FP0_REGNUM
+ 1)], 8);
1056 memcpy (valbuf
, &ff
, sizeof(float));
1060 /* return value is copied starting from r3. */
1061 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
1062 && TYPE_LENGTH (valtype
) < REGISTER_RAW_SIZE (3))
1063 offset
= REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype
);
1066 regbuf
+ REGISTER_BYTE (3) + offset
,
1067 TYPE_LENGTH (valtype
));
1072 /* keep structure return address in this variable.
1073 FIXME: This is a horrid kludge which should not be allowed to continue
1074 living. This only allows a single nested call to a structure-returning
1075 function. Come on, guys! -- gnu@cygnus.com, Aug 92 */
1077 CORE_ADDR rs6000_struct_return_address
;
1080 /* Indirect function calls use a piece of trampoline code to do context
1081 switching, i.e. to set the new TOC table. Skip such code if we are on
1082 its first instruction (as when we have single-stepped to here).
1083 Also skip shared library trampoline code (which is different from
1084 indirect function call trampolines).
1085 Result is desired PC to step until, or NULL if we are not in
1089 skip_trampoline_code (pc
)
1092 register unsigned int ii
, op
;
1093 CORE_ADDR solib_target_pc
;
1095 static unsigned trampoline_code
[] = {
1096 0x800b0000, /* l r0,0x0(r11) */
1097 0x90410014, /* st r2,0x14(r1) */
1098 0x7c0903a6, /* mtctr r0 */
1099 0x804b0004, /* l r2,0x4(r11) */
1100 0x816b0008, /* l r11,0x8(r11) */
1101 0x4e800420, /* bctr */
1102 0x4e800020, /* br */
1106 /* If pc is in a shared library trampoline, return its target. */
1107 solib_target_pc
= find_solib_trampoline_target (pc
);
1108 if (solib_target_pc
)
1109 return solib_target_pc
;
1111 for (ii
=0; trampoline_code
[ii
]; ++ii
) {
1112 op
= read_memory_integer (pc
+ (ii
*4), 4);
1113 if (op
!= trampoline_code
[ii
])
1116 ii
= read_register (11); /* r11 holds destination addr */
1117 pc
= read_memory_integer (ii
, 4); /* (r11) value */
1121 /* Determines whether the function FI has a frame on the stack or not. */
1124 frameless_function_invocation (fi
)
1125 struct frame_info
*fi
;
1127 CORE_ADDR func_start
;
1128 struct rs6000_framedata fdata
;
1130 /* Don't even think about framelessness except on the innermost frame
1131 or if the function was interrupted by a signal. */
1132 if (fi
->next
!= NULL
&& !fi
->next
->signal_handler_caller
)
1135 func_start
= get_pc_function_start (fi
->pc
);
1137 /* If we failed to find the start of the function, it is a mistake
1138 to inspect the instructions. */
1142 /* A frame with a zero PC is usually created by dereferencing a NULL
1143 function pointer, normally causing an immediate core dump of the
1144 inferior. Mark function as frameless, as the inferior has no chance
1145 of setting up a stack frame. */
1152 (void) skip_prologue (func_start
, &fdata
);
1153 return fdata
.frameless
;
1156 /* Return the PC saved in a frame */
1160 struct frame_info
*fi
;
1162 CORE_ADDR func_start
;
1163 struct rs6000_framedata fdata
;
1165 if (fi
->signal_handler_caller
)
1166 return read_memory_integer (fi
->frame
+ SIG_FRAME_PC_OFFSET
, 4);
1168 if (USE_GENERIC_DUMMY_FRAMES
)
1170 if (PC_IN_CALL_DUMMY (fi
->pc
, fi
->frame
, fi
->frame
))
1171 return generic_read_register_dummy(fi
->pc
, fi
->frame
, PC_REGNUM
);
1174 func_start
= get_pc_function_start (fi
->pc
);
1176 /* If we failed to find the start of the function, it is a mistake
1177 to inspect the instructions. */
1181 (void) skip_prologue (func_start
, &fdata
);
1183 if (fdata
.lr_offset
== 0 && fi
->next
!= NULL
)
1185 if (fi
->next
->signal_handler_caller
)
1186 return read_memory_integer (fi
->next
->frame
+ SIG_FRAME_LR_OFFSET
, 4);
1188 return read_memory_integer (rs6000_frame_chain (fi
) + DEFAULT_LR_SAVE
,
1192 if (fdata
.lr_offset
== 0)
1193 return read_register (LR_REGNUM
);
1195 return read_memory_integer (rs6000_frame_chain (fi
) + fdata
.lr_offset
, 4);
1198 /* If saved registers of frame FI are not known yet, read and cache them.
1199 &FDATAP contains rs6000_framedata; TDATAP can be NULL,
1200 in which case the framedata are read. */
1203 frame_get_saved_regs (fi
, fdatap
)
1204 struct frame_info
*fi
;
1205 struct rs6000_framedata
*fdatap
;
1208 CORE_ADDR frame_addr
;
1209 struct rs6000_framedata work_fdata
;
1216 fdatap
= &work_fdata
;
1217 (void) skip_prologue (get_pc_function_start (fi
->pc
), fdatap
);
1220 frame_saved_regs_zalloc (fi
);
1222 /* If there were any saved registers, figure out parent's stack
1224 /* The following is true only if the frame doesn't have a call to
1227 if (fdatap
->saved_fpr
== 0 && fdatap
->saved_gpr
== 0
1228 && fdatap
->lr_offset
== 0 && fdatap
->cr_offset
== 0)
1230 else if (fi
->prev
&& fi
->prev
->frame
)
1231 frame_addr
= fi
->prev
->frame
;
1233 frame_addr
= read_memory_integer (fi
->frame
, 4);
1235 /* if != -1, fdatap->saved_fpr is the smallest number of saved_fpr.
1236 All fpr's from saved_fpr to fp31 are saved. */
1238 if (fdatap
->saved_fpr
>= 0)
1241 int fpr_offset
= frame_addr
+ fdatap
->fpr_offset
;
1242 for (i
= fdatap
->saved_fpr
; i
< 32; i
++)
1244 fi
->saved_regs
[FP0_REGNUM
+ i
] = fpr_offset
;
1249 /* if != -1, fdatap->saved_gpr is the smallest number of saved_gpr.
1250 All gpr's from saved_gpr to gpr31 are saved. */
1252 if (fdatap
->saved_gpr
>= 0)
1255 int gpr_offset
= frame_addr
+ fdatap
->gpr_offset
;
1256 for (i
= fdatap
->saved_gpr
; i
< 32; i
++)
1258 fi
->saved_regs
[i
] = gpr_offset
;
1263 /* If != 0, fdatap->cr_offset is the offset from the frame that holds
1265 if (fdatap
->cr_offset
!= 0)
1266 fi
->saved_regs
[CR_REGNUM
] = frame_addr
+ fdatap
->cr_offset
;
1268 /* If != 0, fdatap->lr_offset is the offset from the frame that holds
1270 if (fdatap
->lr_offset
!= 0)
1271 fi
->saved_regs
[LR_REGNUM
] = frame_addr
+ fdatap
->lr_offset
;
1274 /* Return the address of a frame. This is the inital %sp value when the frame
1275 was first allocated. For functions calling alloca(), it might be saved in
1276 an alloca register. */
1279 frame_initial_stack_address (fi
)
1280 struct frame_info
*fi
;
1283 struct rs6000_framedata fdata
;
1284 struct frame_info
*callee_fi
;
1286 /* if the initial stack pointer (frame address) of this frame is known,
1289 if (fi
->extra_info
->initial_sp
)
1290 return fi
->extra_info
->initial_sp
;
1292 /* find out if this function is using an alloca register.. */
1294 (void) skip_prologue (get_pc_function_start (fi
->pc
), &fdata
);
1296 /* if saved registers of this frame are not known yet, read and cache them. */
1298 if (!fi
->saved_regs
)
1299 frame_get_saved_regs (fi
, &fdata
);
1301 /* If no alloca register used, then fi->frame is the value of the %sp for
1302 this frame, and it is good enough. */
1304 if (fdata
.alloca_reg
< 0)
1306 fi
->extra_info
->initial_sp
= fi
->frame
;
1307 return fi
->extra_info
->initial_sp
;
1310 /* This function has an alloca register. If this is the top-most frame
1311 (with the lowest address), the value in alloca register is good. */
1314 return fi
->extra_info
->initial_sp
= read_register (fdata
.alloca_reg
);
1316 /* Otherwise, this is a caller frame. Callee has usually already saved
1317 registers, but there are exceptions (such as when the callee
1318 has no parameters). Find the address in which caller's alloca
1319 register is saved. */
1321 for (callee_fi
= fi
->next
; callee_fi
; callee_fi
= callee_fi
->next
) {
1323 if (!callee_fi
->saved_regs
)
1324 frame_get_saved_regs (callee_fi
, NULL
);
1326 /* this is the address in which alloca register is saved. */
1328 tmpaddr
= callee_fi
->saved_regs
[fdata
.alloca_reg
];
1330 fi
->extra_info
->initial_sp
= read_memory_integer (tmpaddr
, 4);
1331 return fi
->extra_info
->initial_sp
;
1334 /* Go look into deeper levels of the frame chain to see if any one of
1335 the callees has saved alloca register. */
1338 /* If alloca register was not saved, by the callee (or any of its callees)
1339 then the value in the register is still good. */
1341 fi
->extra_info
->initial_sp
= read_register (fdata
.alloca_reg
);
1342 return fi
->extra_info
->initial_sp
;
1346 rs6000_frame_chain (thisframe
)
1347 struct frame_info
*thisframe
;
1351 if (USE_GENERIC_DUMMY_FRAMES
)
1353 if (PC_IN_CALL_DUMMY (thisframe
->pc
, thisframe
->frame
, thisframe
->frame
))
1354 return thisframe
->frame
; /* dummy frame same as caller's frame */
1357 if (inside_entry_file (thisframe
->pc
) ||
1358 thisframe
->pc
== entry_point_address ())
1361 if (thisframe
->signal_handler_caller
)
1362 fp
= read_memory_integer (thisframe
->frame
+ SIG_FRAME_FP_OFFSET
, 4);
1363 else if (thisframe
->next
!= NULL
1364 && thisframe
->next
->signal_handler_caller
1365 && frameless_function_invocation (thisframe
))
1366 /* A frameless function interrupted by a signal did not change the
1368 fp
= FRAME_FP (thisframe
);
1370 fp
= read_memory_integer ((thisframe
)->frame
, 4);
1372 if (USE_GENERIC_DUMMY_FRAMES
)
1376 lr
= read_register (LR_REGNUM
);
1377 if (lr
== entry_point_address ())
1378 if (fp
!= 0 && (fpp
= read_memory_integer (fp
, 4)) != 0)
1379 if (PC_IN_CALL_DUMMY (lr
, fpp
, fpp
))
1386 /* Return nonzero if ADDR (a function pointer) is in the data space and
1387 is therefore a special function pointer. */
1390 is_magic_function_pointer (addr
)
1393 struct obj_section
*s
;
1395 s
= find_pc_section (addr
);
1396 if (s
&& s
->the_bfd_section
->flags
& SEC_CODE
)
1402 #ifdef GDB_TARGET_POWERPC
1404 gdb_print_insn_powerpc (memaddr
, info
)
1406 disassemble_info
*info
;
1408 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
1409 return print_insn_big_powerpc (memaddr
, info
);
1411 return print_insn_little_powerpc (memaddr
, info
);
1416 /* Handling the various PowerPC/RS6000 variants. */
1419 /* The arrays here called register_names_MUMBLE hold names that
1420 the rs6000_register_name function returns.
1422 For each family of PPC variants, I've tried to isolate out the
1423 common registers and put them up front, so that as long as you get
1424 the general family right, GDB will correctly identify the registers
1425 common to that family. The common register sets are:
1427 For the 60x family: hid0 hid1 iabr dabr pir
1429 For the 505 and 860 family: eie eid nri
1431 For the 403 and 403GC: icdbdr esr dear evpr cdbcr tsr tcr pit tbhi
1432 tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1
1435 Most of these register groups aren't anything formal. I arrived at
1436 them by looking at the registers that occurred in more than one
1439 /* UISA register names common across all architectures, including POWER. */
1441 #define COMMON_UISA_REG_NAMES \
1442 /* 0 */ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
1443 /* 8 */ "r8", "r9", "r10","r11","r12","r13","r14","r15", \
1444 /* 16 */ "r16","r17","r18","r19","r20","r21","r22","r23", \
1445 /* 24 */ "r24","r25","r26","r27","r28","r29","r30","r31", \
1446 /* 32 */ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
1447 /* 40 */ "f8", "f9", "f10","f11","f12","f13","f14","f15", \
1448 /* 48 */ "f16","f17","f18","f19","f20","f21","f22","f23", \
1449 /* 56 */ "f24","f25","f26","f27","f28","f29","f30","f31", \
1452 /* UISA-level SPR names for PowerPC. */
1453 #define PPC_UISA_SPR_NAMES \
1454 /* 66 */ "cr", "lr", "ctr", "xer", ""
1456 /* Segment register names, for PowerPC. */
1457 #define PPC_SEGMENT_REG_NAMES \
1458 /* 71 */ "sr0", "sr1", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7", \
1459 /* 79 */ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15"
1461 /* OEA SPR names for 32-bit PowerPC implementations.
1462 The blank space is for "asr", which is only present on 64-bit
1464 #define PPC_32_OEA_SPR_NAMES \
1466 /* 88 */ "ibat0u", "ibat0l", "ibat1u", "ibat1l", \
1467 /* 92 */ "ibat2u", "ibat2l", "ibat3u", "ibat3l", \
1468 /* 96 */ "dbat0u", "dbat0l", "dbat1u", "dbat1l", \
1469 /* 100 */ "dbat2u", "dbat2l", "dbat3u", "dbat3l", \
1470 /* 104 */ "sdr1", "", "dar", "dsisr", "sprg0", "sprg1", "sprg2", "sprg3",\
1471 /* 112 */ "srr0", "srr1", "tbl", "tbu", "dec", "dabr", "ear"
1473 /* For the RS6000, we only cover user-level SPR's. */
1474 char *register_names_rs6000
[] =
1476 COMMON_UISA_REG_NAMES
,
1477 /* 66 */ "cnd", "lr", "cnt", "xer", "mq"
1480 /* a UISA-only view of the PowerPC. */
1481 char *register_names_uisa
[] =
1483 COMMON_UISA_REG_NAMES
,
1487 char *register_names_403
[] =
1489 COMMON_UISA_REG_NAMES
,
1491 PPC_SEGMENT_REG_NAMES
,
1492 PPC_32_OEA_SPR_NAMES
,
1493 /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
1494 /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
1495 /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2"
1498 char *register_names_403GC
[] =
1500 COMMON_UISA_REG_NAMES
,
1502 PPC_SEGMENT_REG_NAMES
,
1503 PPC_32_OEA_SPR_NAMES
,
1504 /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
1505 /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
1506 /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2",
1507 /* 143 */ "zpr", "pid", "sgr", "dcwr", "tbhu", "tblu"
1510 char *register_names_505
[] =
1512 COMMON_UISA_REG_NAMES
,
1514 PPC_SEGMENT_REG_NAMES
,
1515 PPC_32_OEA_SPR_NAMES
,
1516 /* 119 */ "eie", "eid", "nri"
1519 char *register_names_860
[] =
1521 COMMON_UISA_REG_NAMES
,
1523 PPC_SEGMENT_REG_NAMES
,
1524 PPC_32_OEA_SPR_NAMES
,
1525 /* 119 */ "eie", "eid", "nri", "cmpa", "cmpb", "cmpc", "cmpd", "icr",
1526 /* 127 */ "der", "counta", "countb", "cmpe", "cmpf", "cmpg", "cmph",
1527 /* 134 */ "lctrl1", "lctrl2", "ictrl", "bar", "ic_cst", "ic_adr", "ic_dat",
1528 /* 141 */ "dc_cst", "dc_adr", "dc_dat", "dpdr", "dpir", "immr", "mi_ctr",
1529 /* 148 */ "mi_ap", "mi_epn", "mi_twc", "mi_rpn", "md_ctr", "m_casid",
1530 /* 154 */ "md_ap", "md_epn", "md_twb", "md_twc", "md_rpn", "m_tw",
1531 /* 160 */ "mi_dbcam", "mi_dbram0", "mi_dbram1", "md_dbcam", "md_dbram0",
1532 /* 165 */ "md_dbram1"
1535 /* Note that the 601 has different register numbers for reading and
1536 writing RTCU and RTCL. However, how one reads and writes a
1537 register is the stub's problem. */
1538 char *register_names_601
[] =
1540 COMMON_UISA_REG_NAMES
,
1542 PPC_SEGMENT_REG_NAMES
,
1543 PPC_32_OEA_SPR_NAMES
,
1544 /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mq", "rtcu",
1548 char *register_names_602
[] =
1550 COMMON_UISA_REG_NAMES
,
1552 PPC_SEGMENT_REG_NAMES
,
1553 PPC_32_OEA_SPR_NAMES
,
1554 /* 119 */ "hid0", "hid1", "iabr", "", "", "tcr", "ibr", "esassr", "sebr",
1555 /* 128 */ "ser", "sp", "lt"
1558 char *register_names_603
[] =
1560 COMMON_UISA_REG_NAMES
,
1562 PPC_SEGMENT_REG_NAMES
,
1563 PPC_32_OEA_SPR_NAMES
,
1564 /* 119 */ "hid0", "hid1", "iabr", "", "", "dmiss", "dcmp", "hash1",
1565 /* 127 */ "hash2", "imiss", "icmp", "rpa"
1568 char *register_names_604
[] =
1570 COMMON_UISA_REG_NAMES
,
1572 PPC_SEGMENT_REG_NAMES
,
1573 PPC_32_OEA_SPR_NAMES
,
1574 /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mmcr0", "pmc1", "pmc2",
1575 /* 127 */ "sia", "sda"
1578 char *register_names_750
[] =
1580 COMMON_UISA_REG_NAMES
,
1582 PPC_SEGMENT_REG_NAMES
,
1583 PPC_32_OEA_SPR_NAMES
,
1584 /* 119 */ "hid0", "hid1", "iabr", "dabr", "", "ummcr0", "upmc1", "upmc2",
1585 /* 127 */ "usia", "ummcr1", "upmc3", "upmc4", "mmcr0", "pmc1", "pmc2",
1586 /* 134 */ "sia", "mmcr1", "pmc3", "pmc4", "l2cr", "ictc", "thrm1", "thrm2",
1591 /* Information about a particular processor variant. */
1594 /* Name of this variant. */
1597 /* English description of the variant. */
1600 /* Table of register names; registers[R] is the name of the register
1606 #define num_registers(list) (sizeof (list) / sizeof((list)[0]))
1609 /* Information in this table comes from the following web sites:
1610 IBM: http://www.chips.ibm.com:80/products/embedded/
1611 Motorola: http://www.mot.com/SPS/PowerPC/
1613 I'm sure I've got some of the variant descriptions not quite right.
1614 Please report any inaccuracies you find to GDB's maintainer.
1616 If you add entries to this table, please be sure to allow the new
1617 value as an argument to the --with-cpu flag, in configure.in. */
1619 static struct variant
1622 { "ppc-uisa", "PowerPC UISA - a PPC processor as viewed by user-level code",
1623 num_registers (register_names_uisa
), register_names_uisa
},
1624 { "rs6000", "IBM RS6000 (\"POWER\") architecture, user-level view",
1625 num_registers (register_names_rs6000
), register_names_rs6000
},
1626 { "403", "IBM PowerPC 403",
1627 num_registers (register_names_403
), register_names_403
},
1628 { "403GC", "IBM PowerPC 403GC",
1629 num_registers (register_names_403GC
), register_names_403GC
},
1630 { "505", "Motorola PowerPC 505",
1631 num_registers (register_names_505
), register_names_505
},
1632 { "860", "Motorola PowerPC 860 or 850",
1633 num_registers (register_names_860
), register_names_860
},
1634 { "601", "Motorola PowerPC 601",
1635 num_registers (register_names_601
), register_names_601
},
1636 { "602", "Motorola PowerPC 602",
1637 num_registers (register_names_602
), register_names_602
},
1638 { "603", "Motorola/IBM PowerPC 603 or 603e",
1639 num_registers (register_names_603
), register_names_603
},
1640 { "604", "Motorola PowerPC 604 or 604e",
1641 num_registers (register_names_604
), register_names_604
},
1642 { "750", "Motorola/IBM PowerPC 750 or 750",
1643 num_registers (register_names_750
), register_names_750
},
1648 static struct variant
*current_variant
;
1651 rs6000_register_name (int i
)
1653 if (i
< 0 || i
>= NUM_REGS
)
1654 error ("GDB bug: rs6000-tdep.c (rs6000_register_name): strange register number");
1656 return ((i
< current_variant
->num_registers
)
1657 ? current_variant
->registers
[i
]
1663 install_variant (struct variant
*v
)
1665 current_variant
= v
;
1669 /* Look up the variant named NAME in the `variants' table. Return a
1670 pointer to the struct variant, or null if we couldn't find it. */
1671 static struct variant
*
1672 find_variant_by_name (char *name
)
1676 for (i
= 0; variants
[i
].name
; i
++)
1677 if (! strcmp (name
, variants
[i
].name
))
1678 return &variants
[i
];
1684 /* Install the PPC/RS6000 variant named NAME in the `variants' table.
1685 Return zero if we installed it successfully, or a non-zero value if
1688 This might be useful to code outside this file, which doesn't want
1689 to depend on the exact indices of the entries in the `variants'
1690 table. Just make it non-static if you want that. */
1692 install_variant_by_name (char *name
)
1694 struct variant
*v
= find_variant_by_name (name
);
1698 install_variant (v
);
1711 printf_filtered ("GDB knows about the following PowerPC and RS6000 variants:\n");
1713 for (i
= 0; variants
[i
].name
; i
++)
1714 printf_filtered (" %-8s %s\n",
1715 variants
[i
].name
, variants
[i
].description
);
1720 show_current_variant ()
1722 printf_filtered ("PowerPC / RS6000 processor variant is set to `%s'.\n",
1723 current_variant
->name
);
1728 set_processor (char *arg
, int from_tty
)
1732 if (! arg
|| arg
[0] == '\0')
1738 if (install_variant_by_name (arg
))
1741 fprintf_filtered (gdb_stderr
,
1742 "`%s' is not a recognized PowerPC / RS6000 variant name.\n\n", arg
);
1744 return_to_top_level (RETURN_ERROR
);
1747 show_current_variant ();
1751 show_processor (char *arg
, int from_tty
)
1753 show_current_variant ();
1758 /* Initialization code. */
1761 _initialize_rs6000_tdep ()
1763 /* FIXME, this should not be decided via ifdef. */
1764 #ifdef GDB_TARGET_POWERPC
1765 tm_print_insn
= gdb_print_insn_powerpc
;
1767 tm_print_insn
= print_insn_rs6000
;
1770 /* I don't think we should use the set/show command arrangement
1771 here, because the way that's implemented makes it hard to do the
1772 error checking we want in a reasonable way. So we just add them
1773 as two separate commands. */
1774 add_cmd ("processor", class_support
, set_processor
,
1775 "`set processor NAME' sets the PowerPC/RS6000 variant to NAME.\n\
1776 If you set this, GDB will know about the special-purpose registers that are\n\
1777 available on the given variant.\n\
1778 Type `set processor' alone for a list of recognized variant names.",
1780 add_cmd ("processor", class_support
, show_processor
,
1781 "Show the variant of the PowerPC or RS6000 processor in use.\n\
1782 Use `set processor' to change this.",
1785 /* Set the current PPC processor variant. */
1789 #ifdef TARGET_CPU_DEFAULT
1790 status
= install_variant_by_name (TARGET_CPU_DEFAULT
);
1795 #ifdef GDB_TARGET_POWERPC
1796 install_variant_by_name ("ppc-uisa");
1798 install_variant_by_name ("rs6000");