ad09cb2bd3
hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info), valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if REGISTER_CONVERTIBLE is defined, otherwise just copy the content. Pass desired type to REGISTER_CONVERT_TO_*. * config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*): Pass length of desired type to store/extract_floating. * config/i386/tm-arm.h, config/i386/tm-i386aix.h, config/i386/tm-sun386.h, config/i386/tm-symmetry.h, config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*): Use extract_floating and store_floating with length of desired type. * config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type parameter to REGISTER_CONVERT_*. * config/a29k/tm-a29k.h, config/convex/tm-convex.h, config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h, config/h8500/tm-h8500.h, config/i386/tm-i386v.h, config/mips/tm-mips.h, config/ns32k/tm-merlin.h, config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h, config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h, config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove versions for which REGISTER_CONVERTIBLE is always false. * z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw): Remove, no longer used. * alpha-tdep.c (alpha_register_convert_to_raw, alpha_register_convert_to_virtual): New routines to handle the different raw formats in alpha floating point registers. * config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
331 lines
12 KiB
C
331 lines
12 KiB
C
/* Definitions to make GDB run on a vax under 4.2bsd.
|
||
Copyright 1986, 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
|
||
|
||
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 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. */
|
||
|
||
|
||
#define TARGET_BYTE_ORDER LITTLE_ENDIAN
|
||
|
||
/* Offset from address of function to start of its code.
|
||
Zero on most machines. */
|
||
|
||
#define FUNCTION_START_OFFSET 2
|
||
|
||
/* Advance PC across any function entry prologue instructions
|
||
to reach some "real" code. */
|
||
|
||
#define SKIP_PROLOGUE(pc) \
|
||
{ register int op = (unsigned char) read_memory_integer (pc, 1); \
|
||
if (op == 0x11) pc += 2; /* skip brb */ \
|
||
if (op == 0x31) pc += 3; /* skip brw */ \
|
||
if (op == 0xC2 && \
|
||
((unsigned char) read_memory_integer (pc+2, 1)) == 0x5E) \
|
||
pc += 3; /* skip subl2 */ \
|
||
if (op == 0x9E && \
|
||
((unsigned char) read_memory_integer (pc+1, 1)) == 0xAE && \
|
||
((unsigned char) read_memory_integer(pc+3, 1)) == 0x5E) \
|
||
pc += 4; /* skip movab */ \
|
||
if (op == 0x9E && \
|
||
((unsigned char) read_memory_integer (pc+1, 1)) == 0xCE && \
|
||
((unsigned char) read_memory_integer(pc+4, 1)) == 0x5E) \
|
||
pc += 5; /* skip movab */ \
|
||
if (op == 0x9E && \
|
||
((unsigned char) read_memory_integer (pc+1, 1)) == 0xEE && \
|
||
((unsigned char) read_memory_integer(pc+6, 1)) == 0x5E) \
|
||
pc += 7; /* skip movab */ \
|
||
}
|
||
|
||
/* 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) FRAME_SAVED_PC(frame)
|
||
|
||
#define TARGET_UPAGES 14
|
||
#define TARGET_NBPG 512
|
||
#define STACK_END_ADDR (0x80000000 - (TARGET_UPAGES * TARGET_NBPG))
|
||
|
||
/* On the VAX, sigtramp is in the u area. Can't check the exact
|
||
addresses because for cross-debugging we don't have VAX include
|
||
files around. This should be close enough. */
|
||
#define SIGTRAMP_START STACK_END_ADDR
|
||
#define SIGTRAMP_END 0x80000000
|
||
|
||
/* Stack grows downward. */
|
||
|
||
#define INNER_THAN <
|
||
|
||
/* Sequence of bytes for breakpoint instruction. */
|
||
|
||
#define BREAKPOINT {3}
|
||
|
||
/* Amount PC must be decremented by after a breakpoint.
|
||
This is often the number of bytes in BREAKPOINT
|
||
but not always. */
|
||
|
||
#define DECR_PC_AFTER_BREAK 0
|
||
|
||
/* Nonzero if instruction at PC is a return instruction. */
|
||
|
||
#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 04)
|
||
|
||
/* Return 1 if P points to an invalid floating point value.
|
||
LEN is the length in bytes -- not relevant on the Vax. */
|
||
|
||
#define INVALID_FLOAT(p, len) ((*(short *) p & 0xff80) == 0x8000)
|
||
|
||
/* Say how long (ordinary) registers are. */
|
||
|
||
#define REGISTER_TYPE long
|
||
|
||
/* Number of machine registers */
|
||
|
||
#define NUM_REGS 17
|
||
|
||
/* Initializer for an array of names of registers.
|
||
There should be NUM_REGS strings in this initializer. */
|
||
|
||
#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", "ps"}
|
||
|
||
/* Register numbers of various important registers.
|
||
Note that some of these values are "real" register numbers,
|
||
and correspond to the general registers of the machine,
|
||
and some are "phony" register numbers which are too large
|
||
to be actual register numbers as far as the user is concerned
|
||
but do serve to get the desired values when passed to read_register. */
|
||
|
||
#define AP_REGNUM 12
|
||
#define FP_REGNUM 13 /* Contains address of executing stack frame */
|
||
#define SP_REGNUM 14 /* Contains address of top of stack */
|
||
#define PC_REGNUM 15 /* Contains program counter */
|
||
#define PS_REGNUM 16 /* Contains processor status */
|
||
|
||
/* Total amount of space needed to store our copies of the machine's
|
||
register state, the array `registers'. */
|
||
#define REGISTER_BYTES (17*4)
|
||
|
||
/* Index within `registers' of the first byte of the space for
|
||
register N. */
|
||
|
||
#define REGISTER_BYTE(N) ((N) * 4)
|
||
|
||
/* Number of bytes of storage in the actual machine representation
|
||
for register N. On the vax, all regs are 4 bytes. */
|
||
|
||
#define REGISTER_RAW_SIZE(N) 4
|
||
|
||
/* Number of bytes of storage in the program's representation
|
||
for register N. On the vax, all regs are 4 bytes. */
|
||
|
||
#define REGISTER_VIRTUAL_SIZE(N) 4
|
||
|
||
/* Largest value REGISTER_RAW_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_RAW_SIZE 4
|
||
|
||
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_VIRTUAL_SIZE 4
|
||
|
||
/* Return the GDB type object for the "standard" data type
|
||
of data in register N. */
|
||
|
||
#define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
|
||
|
||
/* Store the address of the place in which to copy the structure the
|
||
subroutine will return. This is called from call_function. */
|
||
|
||
#define STORE_STRUCT_RETURN(ADDR, SP) \
|
||
{ write_register (1, (ADDR)); }
|
||
|
||
/* Extract from an array REGBUF containing the (raw) register state
|
||
a function return value of type TYPE, and copy that, in virtual format,
|
||
into VALBUF. */
|
||
|
||
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
|
||
memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE))
|
||
|
||
/* Write into appropriate registers a function return value
|
||
of type TYPE, given in virtual format. */
|
||
|
||
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
|
||
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). */
|
||
|
||
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
|
||
|
||
|
||
/* Describe the pointer in each stack frame to the previous stack frame
|
||
(its caller). */
|
||
|
||
/* FRAME_CHAIN takes a frame's nominal address
|
||
and produces the frame's chain-pointer. */
|
||
|
||
/* In the case of the Vax, the frame's nominal address is the FP value,
|
||
and 12 bytes later comes the saved previous FP value as a 4-byte word. */
|
||
|
||
#define FRAME_CHAIN(thisframe) \
|
||
(!inside_entry_file ((thisframe)->pc) ? \
|
||
read_memory_integer ((thisframe)->frame + 12, 4) :\
|
||
0)
|
||
|
||
/* Define other aspects of the stack frame. */
|
||
|
||
/* 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. */
|
||
/* On the vax, all functions have frames. */
|
||
#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;}
|
||
|
||
/* Saved Pc. Get it from sigcontext if within sigtramp. */
|
||
|
||
/* Offset to saved PC in sigcontext, from <sys/signal.h>. */
|
||
#define SIGCONTEXT_PC_OFFSET 12
|
||
|
||
#define FRAME_SAVED_PC(FRAME) \
|
||
(((FRAME)->signal_handler_caller \
|
||
? sigtramp_saved_pc (FRAME) \
|
||
: read_memory_integer ((FRAME)->frame + 16, 4)) \
|
||
)
|
||
|
||
/* Cannot find the AP register value directly from the FP value. Must
|
||
find it saved in the frame called by this one, or in the AP
|
||
register for the innermost frame. However, there is no way to tell
|
||
the difference between the innermost frame and a frame for which we
|
||
just don't know the frame that it called (e.g. "info frame
|
||
0x7ffec789"). For the sake of argument suppose that the stack is
|
||
somewhat trashed (which is one reason that "info frame" exists).
|
||
So return 0 (indicating we don't know the address of
|
||
the arglist) if we don't know what frame this frame calls. */
|
||
#define FRAME_ARGS_ADDRESS_CORRECT(fi) \
|
||
(((fi)->next \
|
||
? read_memory_integer ((fi)->next->frame + 8, 4) \
|
||
: /* read_register (AP_REGNUM) */ 0))
|
||
|
||
/* In most of GDB, getting the args address is too important to
|
||
just say "I don't know". This is sometimes wrong for functions
|
||
that aren't on top of the stack, but c'est la vie. */
|
||
#define FRAME_ARGS_ADDRESS(fi) \
|
||
(((fi)->next \
|
||
? read_memory_integer ((fi)->next->frame + 8, 4) \
|
||
: read_register (AP_REGNUM) /* 0 */))
|
||
|
||
#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
|
||
|
||
/* Return number of args passed to a frame.
|
||
Can return -1, meaning no way to tell. */
|
||
|
||
#define FRAME_NUM_ARGS(numargs, fi) \
|
||
{ numargs = (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1)); }
|
||
|
||
/* Return number of bytes at start of arglist that are not really args. */
|
||
|
||
#define FRAME_ARGS_SKIP 4
|
||
|
||
/* Put here the code to store, into a struct frame_saved_regs,
|
||
the addresses of the saved registers of frame described by FRAME_INFO.
|
||
This includes special registers such as pc and fp saved in special
|
||
ways in the stack frame. sp is even more special:
|
||
the address we return for it IS the sp for the next frame. */
|
||
|
||
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
||
{ register int regnum; \
|
||
register int regmask = read_memory_integer ((frame_info)->frame+4, 4) >> 16; \
|
||
register CORE_ADDR next_addr; \
|
||
memset (&frame_saved_regs, '\0', sizeof frame_saved_regs); \
|
||
next_addr = (frame_info)->frame + 16; \
|
||
/* Regmask's low bit is for register 0, \
|
||
which is the first one that would be pushed. */ \
|
||
for (regnum = 0; regnum < 12; regnum++, regmask >>= 1) \
|
||
(frame_saved_regs).regs[regnum] = (regmask & 1) ? (next_addr += 4) : 0; \
|
||
(frame_saved_regs).regs[SP_REGNUM] = next_addr + 4; \
|
||
if (read_memory_integer ((frame_info)->frame + 4, 4) & 0x20000000) \
|
||
(frame_saved_regs).regs[SP_REGNUM] += 4 + 4 * read_memory_integer (next_addr + 4, 4); \
|
||
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 16; \
|
||
(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame + 12; \
|
||
(frame_saved_regs).regs[AP_REGNUM] = (frame_info)->frame + 8; \
|
||
(frame_saved_regs).regs[PS_REGNUM] = (frame_info)->frame + 4; \
|
||
}
|
||
|
||
/* Things needed for making the inferior call functions. */
|
||
|
||
/* Push an empty stack frame, to record the current PC, etc. */
|
||
|
||
#define PUSH_DUMMY_FRAME \
|
||
{ register CORE_ADDR sp = read_register (SP_REGNUM);\
|
||
register int regnum; \
|
||
sp = push_word (sp, 0); /* arglist */ \
|
||
for (regnum = 11; regnum >= 0; regnum--) \
|
||
sp = push_word (sp, read_register (regnum)); \
|
||
sp = push_word (sp, read_register (PC_REGNUM)); \
|
||
sp = push_word (sp, read_register (FP_REGNUM)); \
|
||
sp = push_word (sp, read_register (AP_REGNUM)); \
|
||
sp = push_word (sp, (read_register (PS_REGNUM) & 0xffef) \
|
||
+ 0x2fff0000); \
|
||
sp = push_word (sp, 0); \
|
||
write_register (SP_REGNUM, sp); \
|
||
write_register (FP_REGNUM, sp); \
|
||
write_register (AP_REGNUM, sp + 17 * sizeof (int)); }
|
||
|
||
/* Discard from the stack the innermost frame, restoring all registers. */
|
||
|
||
#define POP_FRAME \
|
||
{ register CORE_ADDR fp = read_register (FP_REGNUM); \
|
||
register int regnum; \
|
||
register int regmask = read_memory_integer (fp + 4, 4); \
|
||
write_register (PS_REGNUM, \
|
||
(regmask & 0xffff) \
|
||
| (read_register (PS_REGNUM) & 0xffff0000)); \
|
||
write_register (PC_REGNUM, read_memory_integer (fp + 16, 4)); \
|
||
write_register (FP_REGNUM, read_memory_integer (fp + 12, 4)); \
|
||
write_register (AP_REGNUM, read_memory_integer (fp + 8, 4)); \
|
||
fp += 16; \
|
||
for (regnum = 0; regnum < 12; regnum++) \
|
||
if (regmask & (0x10000 << regnum)) \
|
||
write_register (regnum, read_memory_integer (fp += 4, 4)); \
|
||
fp = fp + 4 + ((regmask >> 30) & 3); \
|
||
if (regmask & 0x20000000) \
|
||
{ regnum = read_memory_integer (fp, 4); \
|
||
fp += (regnum + 1) * 4; } \
|
||
write_register (SP_REGNUM, fp); \
|
||
flush_cached_frames (); \
|
||
set_current_frame (create_new_frame (read_register (FP_REGNUM),\
|
||
read_pc ())); }
|
||
|
||
/* This sequence of words is the instructions
|
||
calls #69, @#32323232
|
||
bpt
|
||
Note this is 8 bytes. */
|
||
|
||
#define CALL_DUMMY {0x329f69fb, 0x03323232}
|
||
|
||
#define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */
|
||
|
||
/* 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) \
|
||
{ *((char *) dummyname + 1) = nargs; \
|
||
*(int *)((char *) dummyname + 3) = fun; }
|
||
|
||
/* If vax pcc says CHAR or SHORT, it provides the correct address. */
|
||
|
||
#define BELIEVE_PCC_PROMOTION 1
|