/* Target machine description for generic Motorola 88000, for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993, 1994, 1996, 1998,
+ 1999, 2000
Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-#include "ieee-float.h"
+#include "doublest.h"
+#include "regcache.h"
/* g++ support is not yet included. */
init_extra_frame_info (fromleaf, fi)
extern void init_extra_frame_info ();
-#define IEEE_FLOAT
+#define IEEE_FLOAT (1)
/* Offset from address of function to start of its code.
Zero on most machines. */
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
-#define SKIP_PROLOGUE(frompc) \
- { (frompc) = skip_prologue (frompc); }
-extern CORE_ADDR skip_prologue ();
+extern CORE_ADDR m88k_skip_prologue (CORE_ADDR);
+#define SKIP_PROLOGUE(frompc) (m88k_skip_prologue (frompc))
/* The m88k kernel aligns all instructions on 4-byte boundaries. The
kernel also uses the least significant two bits for its own hocus
to realize that those two bits are not really a part of the address
of an instruction. Shrug. */
-#define ADDR_BITS_REMOVE(addr) ((addr) & ~3)
-#define ADDR_BITS_SET(addr) (((addr) | 0x00000002) - 4)
+extern CORE_ADDR m88k_addr_bits_remove (CORE_ADDR);
+#define ADDR_BITS_REMOVE(addr) m88k_addr_bits_remove (addr)
/* Immediately after a function call, return the saved pc.
Can't always go through the frames for this because on some machines
/* Stack grows downward. */
-#define INNER_THAN <
+#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
/* Sequence of bytes for breakpoint instruction. */
#define DECR_PC_AFTER_BREAK 0
-/* Nonzero if instruction at PC is a return instruction. */
-/* 'jmp r1' or 'jmp.n r1' is used to return from a subroutine. */
+/* Say how long (ordinary) registers are. This is a piece of bogosity
+ used in push_word and a few other places; REGISTER_RAW_SIZE is the
+ real way to know how big a register is. */
-#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 2) == 0xF800)
-
-/* This is taken care of in print_floating [IEEE_FLOAT]. */
-
-#define INVALID_FLOAT(p,len) 0
-
-/* Say how long (ordinary) registers are. */
-
-#define REGISTER_TYPE long
+#define REGISTER_SIZE 4
/* Number of machine registers */
* cr06 is invalid */
+/* Note that the Harris Unix kernels emulate the m88100's behavior on
+ the m88110. */
+
#define SXIP_REGNUM 35 /* On m88100, Contains Shadow Execute
Instruction Pointer. */
#define SNIP_REGNUM 36 /* On m88100, Contains Shadow Next
#define PC_REGNUM SXIP_REGNUM /* Program Counter */
#define NPC_REGNUM SNIP_REGNUM /* Next Program Counter */
-#define NNPC_REGNUM SFIP_REGNUM /* Next Next Program Counter */
+#define NNPC_REGNUM SFIP_REGNUM /* Next Next Program Counter */
-#define PSR_REGNUM 32 /* Processor Status Register */
+#define PSR_REGNUM 32 /* Processor Status Register */
#define FPSR_REGNUM 33 /* Floating Point Status Register */
#define FPCR_REGNUM 34 /* Floating Point Control Register */
#define XFP_REGNUM 38 /* First Extended Float Register */
#define REGISTER_CONVERTIBLE(N) ((N) >= XFP_REGNUM)
- /* Convert data from raw format for register REGNUM
- to virtual format for register REGNUM. */
+#include "floatformat.h"
+
+/* Convert data from raw format for register REGNUM in buffer FROM
+ to virtual format with type TYPE in buffer TO. */
- extern const struct ext_format ext_format_m88110;
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
{ \
- if ((REGNUM) < XFP_REGNUM) \
- memcpy ((TO), (FROM), REGISTER_RAW_SIZE (REGNUM)); \
- else ieee_extended_to_double(&ext_format_m88110, \
- (FROM), (double *)(TO)); \
+ double val; \
+ floatformat_to_double (&floatformat_m88110_ext, (FROM), &val); \
+ store_floating ((TO), TYPE_LENGTH (TYPE), val); \
}
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
+/* Convert data from virtual format with type TYPE in buffer FROM
+ to raw format for register REGNUM in buffer TO. */
-#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
+#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
{ \
- if ((REGNUM) < XFP_REGNUM) \
- memcpy ((TO), (FROM), REGISTER_RAW_SIZE (REGNUM)); \
- else double_to_ieee_extended (&ext_format_m88110, \
- (double *)(FROM), (TO)); \
+ double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
+ floatformat_from_double (&floatformat_m88110_ext, &val, (TO)); \
}
/* Return the GDB type object for the "standard" data type
#define FRAME_CHAIN(thisframe) \
frame_chain (thisframe)
-#define FRAMELESS_FUNCTION_INVOCATION(frame, fromleaf) \
- fromleaf = frameless_function_invocation (frame)
+#define FRAMELESS_FUNCTION_INVOCATION(frame) \
+ (frameless_function_invocation (frame))
/* Define other aspects of the stack frame. */
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
-#define FRAME_NUM_ARGS(numargs, fi) ((numargs) = -1)
+#define FRAME_NUM_ARGS(fi) (-1)
/* Return number of bytes at start of arglist that are not really args. */
nice information for GDB to have, but it is not strictly manditory if we
can live without the ability to look at values within (or backup to)
previous frames.
-*/
+ */
struct frame_saved_regs;
struct frame_info;
-void frame_find_saved_regs PARAMS((struct frame_info *fi,
- struct frame_saved_regs *fsr));
+void frame_find_saved_regs (struct frame_info *fi,
+ struct frame_saved_regs *fsr);
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
frame_find_saved_regs (frame_info, &frame_saved_regs)
-
\f
-/* There is not currently a functioning way to call functions in the
- inferior. */
-
-/* But if there was this is where we'd put the call dummy. */
-/* #define CALL_DUMMY_LOCATION AFTER_TEXT_END */
-
-/* When popping a frame on the 88k (say when doing a return command), the
- calling function only expects to have the "preserved" registers restored.
- Thus, those are the only ones that we even try to restore here. */
#define POP_FRAME pop_frame ()
extern void pop_frame ();
+
+/* Call function stuff contributed by Kevin Buettner of Motorola. */
+
+#define CALL_DUMMY_LOCATION AFTER_TEXT_END
+
+extern void m88k_push_dummy_frame ();
+#define PUSH_DUMMY_FRAME m88k_push_dummy_frame()
+
+#define CALL_DUMMY { \
+0x67ff00c0, /* 0: subu #sp,#sp,0xc0 */ \
+0x243f0004, /* 4: st #r1,#sp,0x4 */ \
+0x245f0008, /* 8: st #r2,#sp,0x8 */ \
+0x247f000c, /* c: st #r3,#sp,0xc */ \
+0x249f0010, /* 10: st #r4,#sp,0x10 */ \
+0x24bf0014, /* 14: st #r5,#sp,0x14 */ \
+0x24df0018, /* 18: st #r6,#sp,0x18 */ \
+0x24ff001c, /* 1c: st #r7,#sp,0x1c */ \
+0x251f0020, /* 20: st #r8,#sp,0x20 */ \
+0x253f0024, /* 24: st #r9,#sp,0x24 */ \
+0x255f0028, /* 28: st #r10,#sp,0x28 */ \
+0x257f002c, /* 2c: st #r11,#sp,0x2c */ \
+0x259f0030, /* 30: st #r12,#sp,0x30 */ \
+0x25bf0034, /* 34: st #r13,#sp,0x34 */ \
+0x25df0038, /* 38: st #r14,#sp,0x38 */ \
+0x25ff003c, /* 3c: st #r15,#sp,0x3c */ \
+0x261f0040, /* 40: st #r16,#sp,0x40 */ \
+0x263f0044, /* 44: st #r17,#sp,0x44 */ \
+0x265f0048, /* 48: st #r18,#sp,0x48 */ \
+0x267f004c, /* 4c: st #r19,#sp,0x4c */ \
+0x269f0050, /* 50: st #r20,#sp,0x50 */ \
+0x26bf0054, /* 54: st #r21,#sp,0x54 */ \
+0x26df0058, /* 58: st #r22,#sp,0x58 */ \
+0x26ff005c, /* 5c: st #r23,#sp,0x5c */ \
+0x271f0060, /* 60: st #r24,#sp,0x60 */ \
+0x273f0064, /* 64: st #r25,#sp,0x64 */ \
+0x275f0068, /* 68: st #r26,#sp,0x68 */ \
+0x277f006c, /* 6c: st #r27,#sp,0x6c */ \
+0x279f0070, /* 70: st #r28,#sp,0x70 */ \
+0x27bf0074, /* 74: st #r29,#sp,0x74 */ \
+0x27df0078, /* 78: st #r30,#sp,0x78 */ \
+0x63df0000, /* 7c: addu #r30,#sp,0x0 */ \
+0x145f0000, /* 80: ld #r2,#sp,0x0 */ \
+0x147f0004, /* 84: ld #r3,#sp,0x4 */ \
+0x149f0008, /* 88: ld #r4,#sp,0x8 */ \
+0x14bf000c, /* 8c: ld #r5,#sp,0xc */ \
+0x14df0010, /* 90: ld #r6,#sp,0x10 */ \
+0x14ff0014, /* 94: ld #r7,#sp,0x14 */ \
+0x151f0018, /* 98: ld #r8,#sp,0x18 */ \
+0x153f001c, /* 9c: ld #r9,#sp,0x1c */ \
+0x5c200000, /* a0: or.u #r1,#r0,0x0 */ \
+0x58210000, /* a4: or #r1,#r1,0x0 */ \
+0xf400c801, /* a8: jsr #r1 */ \
+0xf000d1ff /* ac: tb0 0x0,#r0,0x1ff */ \
+}
+
+#define CALL_DUMMY_START_OFFSET 0x80
+#define CALL_DUMMY_LENGTH 0xb0
+
+/* FIXME: byteswapping. */
+#define FIX_CALL_DUMMY(dummy, pc, fun, nargs, args, type, gcc_p) \
+{ \
+ *(unsigned long *)((char *) (dummy) + 0xa0) |= \
+ (((unsigned long) (fun)) >> 16); \
+ *(unsigned long *)((char *) (dummy) + 0xa4) |= \
+ (((unsigned long) (fun)) & 0xffff); \
+}
+
+/* Stack must be aligned on 64-bit boundaries when synthesizing
+ function calls. */
+
+#define STACK_ALIGN(addr) (((addr) + 7) & -8)
+
+#define STORE_STRUCT_RETURN(addr, sp) \
+ write_register (SRA_REGNUM, (addr))
+
+#define NEED_TEXT_START_END 1
+
+/* According to the MC88100 RISC Microprocessor User's Manual, section
+ 6.4.3.1.2:
+
+ ... can be made to return to a particular instruction by placing a
+ valid instruction address in the SNIP and the next sequential
+ instruction address in the SFIP (with V bits set and E bits clear).
+ The rte resumes execution at the instruction pointed to by the
+ SNIP, then the SFIP.
+
+ The E bit is the least significant bit (bit 0). The V (valid) bit is
+ bit 1. This is why we logical or 2 into the values we are writing
+ below. It turns out that SXIP plays no role when returning from an
+ exception so nothing special has to be done with it. We could even
+ (presumably) give it a totally bogus value.
+
+ -- Kevin Buettner
+ */
+
+#define TARGET_WRITE_PC(val, pid) { \
+ write_register_pid(SXIP_REGNUM, (long) val, pid); \
+ write_register_pid(SNIP_REGNUM, (long) val | 2, pid); \
+ write_register_pid(SFIP_REGNUM, ((long) val | 2) + 4, pid); \
+}
projects / deliverable / binutils-gdb.git / blobdiff