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Diffstat (limited to 'gdb/config/tahoe/tm-tahoe.h')
| -rw-r--r-- | gdb/config/tahoe/tm-tahoe.h | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/gdb/config/tahoe/tm-tahoe.h b/gdb/config/tahoe/tm-tahoe.h new file mode 100644 index 00000000000..a9df37411dd --- /dev/null +++ b/gdb/config/tahoe/tm-tahoe.h @@ -0,0 +1,289 @@ +/* Definitions to make GDB target for a tahoe running 4.3-Reno. + Copyright 1986, 1987, 1989, 1991, 1992, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* + * Ported by the State University of New York at Buffalo by the Distributed + * Computer Systems Lab, Department of Computer Science, 1991. + */ + +#define TARGET_BYTE_ORDER BIG_ENDIAN +#define BITS_BIG_ENDIAN 0 + +/* 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 == 0x13) pc += 3; /* skip brw */ \ + if (op == 0x2c && \ + ((unsigned char) read_memory_integer (pc+2, 1)) == 0x5e) \ + pc += 3; /* skip subl2 */ \ + if (op == 0xe9 && \ + ((unsigned char) read_memory_integer (pc+1, 1)) == 0xae && \ + ((unsigned char) read_memory_integer(pc+3, 1)) == 0x5e) \ + pc += 4; /* skip movab */ \ + if (op == 0xe9 && \ + ((unsigned char) read_memory_integer (pc+1, 1)) == 0xce && \ + ((unsigned char) read_memory_integer(pc+4, 1)) == 0x5e) \ + pc += 5; /* skip movab */ \ + if (op == 0xe9 && \ + ((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) + +/* Wrong for cross-debugging. I don't know the real values. */ +#include <machine/param.h> +#define TARGET_UPAGES UPAGES +#define TARGET_NBPG NBPG + +/* Address of end of stack space. */ + +#define STACK_END_ADDR (0xc0000000 - (TARGET_UPAGES * TARGET_NBPG)) + +/* On BSD, sigtramp is in the u area. Can't check the exact + addresses because for cross-debugging we don't have target include + files around. This should be close enough. */ +#define IN_SIGTRAMP(pc, name) ((pc) >= STACK_END_ADDR && (pc < 0xc0000000)) + +/* Stack grows downward. */ + +#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) + +/* Sequence of bytes for breakpoint instruction. */ + +#define BREAKPOINT {0x30} + +/* 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 + +/* Return 1 if P points to an invalid floating point value. + LEN is the length in bytes -- not relevant on the Tahoe. */ + +#define INVALID_FLOAT(p, len) ((*(short *) p & 0xff80) == 0x8000) + +/* 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 REGISTER_SIZE 4 + +/* Number of machine registers */ + +#define NUM_REGS 19 + +/* 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", "r12", "fp", "sp", "pc", "ps", "al", "ah"} + +#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 */ + +#define AL_REGNUM 17 /* Contains accumulator */ +#define AH_REGNUM 18 + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. */ + +#define REGISTER_BYTES (19*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 tahoe, 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 tahoe, 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 Tahoe, the frame's nominal address is the FP value, + and it points to the old FP */ + +#define FRAME_CHAIN(thisframe) \ + (!inside_entry_file ((thisframe)->pc) ? \ + read_memory_integer ((thisframe)->frame, 4) :\ + 0) + +/* Define other aspects of the stack frame. */ + +/* Saved PC */ + +#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame - 8, 4)) + +/* In most of GDB, getting the args address is too important to + just say "I don't know". */ + +#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) + +/* Address to use as an anchor for finding local variables */ + +#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 = ((0xffff & read_memory_integer(((fi)->frame-4),4)) - 4) >> 2; } + +/* Return number of bytes at start of arglist that are not really args. */ + +#define FRAME_ARGS_SKIP 0 + +/* 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 rmask = 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 - 8; \ + for (regnum = 12; regnum >= 0; regnum--, rmask <<= 1) \ + (frame_saved_regs).regs[regnum] = (rmask & 0x1000) ? (next_addr -= 4) : 0;\ + (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \ + (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame - 8; \ + (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \ +} + +/* 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; \ +printf("PUSH_DUMMY_FRAME\n"); \ + sp = push_word (sp, read_register (FP_REGNUM)); \ + write_register (FP_REGNUM, sp); \ + sp = push_word (sp, 0x1fff0004); /*SAVE MASK*/ \ + sp = push_word (sp, read_register (PC_REGNUM)); \ + for (regnum = 12; regnum >= 0; regnum--) \ + sp = push_word (sp, read_register (regnum)); \ + write_register (SP_REGNUM, sp); \ +} + +/* 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); \ +printf("POP_FRAME\n"); \ + regmask >>= 16; \ + write_register (SP_REGNUM, fp+4); \ + write_register (PC_REGNUM, read_memory_integer(fp-8, 4)); \ + write_register (FP_REGNUM, read_memory_integer(fp, 4)); \ + fp -= 8; \ + for (regnum = 12; regnum >= 0; regnum--, regmask <<= 1) \ + if (regmask & 0x1000) \ + write_register (regnum, read_memory_integer (fp-=4, 4)); \ + flush_cached_frames (); \ +} + +/* This sequence of words is the instructions + calls #69, @#32323232 + bpt + Note this is 8 bytes. */ + +#define CALL_DUMMY {0xbf699f32, 0x32323230} + +/* Start execution at beginning of dummy */ + +#define CALL_DUMMY_START_OFFSET 0 + +/* 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, valtype, using_gcc) \ +{ int temp = (int) fun; \ + *((char *) dummyname + 1) = nargs; \ + memcpy((char *)dummyname+3,&temp,4); } + |