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Diffstat (limited to 'gdb/tm-irix3.h')
| -rw-r--r-- | gdb/tm-irix3.h | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/gdb/tm-irix3.h b/gdb/tm-irix3.h new file mode 100644 index 0000000..35440e5 --- /dev/null +++ b/gdb/tm-irix3.h @@ -0,0 +1,346 @@ +/* Copyright (C) 1990 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 BIG_ENDIAN + +/* Floating point is IEEE compliant */ +#define IEEE_FLOAT + +/* Define this if the C compiler puts an underscore at the front + of external names before giving them to the linker. */ + +/*#define NAMES_HAVE_UNDERSCORE*/ + +/* Debugger information will be in mips' format */ + +#define READ_MIPS_FORMAT + +/* File format is coff, but with additions */ + +#define COFF_FORMAT + +/* Offset from address of function to start of its code. + Zero on most machines. */ + +#define FUNCTION_START_OFFSET 0 + +/* Advance PC across any function entry prologue instructions + to reach some "real" code. */ + +#define SKIP_PROLOGUE(pc) pc = mips_skip_prologue(pc) + +/* 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) read_register(RA_REGNUM) + +/* Are we currently handling a signal */ + +#define IN_SIGTRAMP(pc, name) in_sigtramp(pc, name) + +/* Address of end of stack space. */ + +#define STACK_END_ADDR (0x7ffff000) + +/* Stack grows downward. */ + +#define INNER_THAN < + +#define BREAKPOINT {0, 0x5, 0, 0xd} + +/* 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. "j ra" on mips. */ + +#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0x3e00008) + +/* Return 1 if P points to an invalid floating point value. */ + +#define INVALID_FLOAT(p,l) isa_NAN(p,l) + +/* Say how long (all) registers are. */ + +#define REGISTER_TYPE long + +/* Number of machine registers */ + +#define NUM_REGS 71 + +/* Initializer for an array of names of registers. + There should be NUM_REGS strings in this initializer. */ + +#define REGISTER_NAMES \ + { "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3", \ + "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", \ + "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \ + "t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra", \ + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\ + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\ + "pc", "cause", "bad", "hi", "lo", "fsr", "fir" \ + } + +/* 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 SP_REGNUM 29 /* Contains address of top of stack */ +#define FP_REGNUM 30 /* Pseudo register that contains true address of executing stack frame */ +#define RA_REGNUM 31 /* Contains return address value */ +#define FP0_REGNUM 32 /* Floating point register 0 (single float) */ +#define PC_REGNUM 64 /* Contains program counter */ +#define PS_REGNUM 65 /* Contains processor status */ +#define HI_REGNUM 67 /* Multiple/divide temp */ +#define LO_REGNUM 68 /* ... */ +#define FCRCS_REGNUM 69 /* FP control/status */ +#define FCRIR_REGNUM 70 /* FP implementation/revision */ + +/* Define DO_REGISTERS_INFO() to do machine-specific formatting + of register dumps. */ + +#define DO_REGISTERS_INFO(_regnum, fp) mips_do_registers_info(_regnum, fp) + +#define U_REGS_OFFSET 0 + +#define REGISTER_U_ADDR(addr, blockend, regno) \ + if (regno < PC_REGNUM) \ + addr = regno; \ + else \ + addr = regno + NSIG_HNDLRS; /* Skip over signal handlers */ + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. */ +#define REGISTER_BYTES (NUM_REGS*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 mips, 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 mips, 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 + +/* Nonzero if register N requires conversion + from raw format to virtual format. */ + +#define REGISTER_CONVERTIBLE(N) 0 + +/* Convert data from raw format for register REGNUM + to virtual format for register REGNUM. */ + +#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \ + bcopy ((FROM), (TO), 4); + +/* Convert data from virtual format for register REGNUM + to raw format for register REGNUM. */ + +#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \ + bcopy ((FROM), (TO), 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) \ + { sp = push_word(sp, 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. XXX floats */ + +#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ + bcopy (REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), VALBUF, 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 (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), 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+16)) + +/* Structures are returned by ref in extra arg0 */ +#define USE_STRUCT_CONVENTION(gcc_p, type) 1 + + +/* 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. + + FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address + and produces the nominal address of the caller frame. + + However, if FRAME_CHAIN_VALID returns zero, + it means the given frame is the outermost one and has no caller. + In that case, FRAME_CHAIN_COMBINE is not used. */ + +#define FRAME_CHAIN(thisframe) (FRAME_ADDR)mips_frame_chain(thisframe) + +#define FRAME_CHAIN_VALID(chain, thisframe) \ + (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe)))) + +#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain) + +/* 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. */ +/* We handle this differently for mips, and maybe we should not */ + +#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;} + +/* Saved Pc. */ + +#define FRAME_SAVED_PC(FRAME) (mips_frame_saved_pc(FRAME)) + +#define FRAME_ARGS_ADDRESS(fi) (fi)->frame + +#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(num, fi) (num = mips_frame_num_args(fi)) + +/* 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) ( \ + (frame_saved_regs) = *(frame_info)->saved_regs, \ + (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame) + + +/* Things needed for making the inferior call functions. */ + +/* Stack has strict alignment. However, use PUSH_ARGUMENTS + to take care of it. */ +/*#define STACK_ALIGN(addr) (((addr)+3)&~3)*/ + +#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ + sp = mips_push_arguments(nargs, args, sp, struct_return, struct_addr) + +/* Push an empty stack frame, to record the current PC, etc. */ + +#define PUSH_DUMMY_FRAME mips_push_dummy_frame() + +/* Discard from the stack the innermost frame, restoring all registers. */ + +#define POP_FRAME mips_pop_frame() + +#define MK_OP(op,rs,rt,offset) (((op)<<26)|((rs)<<21)|((rt)<<16)|(offset)) +#define CALL_DUMMY_SIZE (16*4) +#define Dest_Reg 2 +#define CALL_DUMMY {\ + MK_OP(0,RA_REGNUM,0,8), /* jr $ra # Fake ABOUT_TO_RETURN ...*/\ + 0, /* nop # ... to stop raw backtrace*/\ + 0x27bd0000, /* addu sp,?0 # Pseudo prologue */\ +/* Start here: */\ + MK_OP(061,SP_REGNUM,12,0), /* lwc1 $f12,0(sp) # Reload first 4 args*/\ + MK_OP(061,SP_REGNUM,13,4), /* lwc1 $f13,4(sp) */\ + MK_OP(061,SP_REGNUM,14,8), /* lwc1 $f14,8(sp) */\ + MK_OP(061,SP_REGNUM,15,12), /* lwc1 $f15,12(sp) */\ + MK_OP(043,SP_REGNUM,4,0), /* lw $r4,0(sp) # Re-load FP regs*/\ + MK_OP(043,SP_REGNUM,5,4), /* lw $r5,4(sp) */\ + MK_OP(043,SP_REGNUM,6,8), /* lw $r6,8(sp) */\ + MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\ + (017<<26)| (Dest_Reg << 16), /* lui $r31,<target upper 16 bits>*/\ + MK_OP(13,Dest_Reg,Dest_Reg,0), /* ori $r31,$r31,<lower 16 bits>*/ \ + (Dest_Reg<<21) | (31<<11) | 9, /* jalr $r31 */\ + MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\ + 0x5000d, /* bpt */\ +} + +#define CALL_DUMMY_START_OFFSET 12 + +/* 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, start_sp, fun, nargs, args, rettype, gcc_p)\ + (((int*)dummyname)[11] |= (((unsigned long)(fun)) >> 16), \ + ((int*)dummyname)[12] |= (unsigned short)(fun)) + +/* Specific information about a procedure. + This overlays the MIPS's PDR records, + mipsread.c (ab)uses this to save memory */ + +typedef struct mips_extra_func_info { + unsigned long adr; /* memory address of start of procedure */ + long isym; /* pointer to procedure symbol */ + long pad2; /* iline: start of line number entries*/ + long regmask; /* save register mask */ + long regoffset; /* save register offset */ + long numargs; /* number of args to procedure (was iopt) */ + long fregmask; /* save floating point register mask */ + long fregoffset; /* save floating point register offset */ + long framesize; /* frameoffset: frame size */ + short framereg; /* frame pointer register */ + short pcreg; /* offset or reg of return pc */ + long lnLow; /* lowest line in the procedure */ + long lnHigh; /* highest line in the procedure */ + long pad3; /* cbLineOffset: byte offset for this procedure from the fd base */ +} *mips_extra_func_info_t; + +#define EXTRA_FRAME_INFO \ + char *proc_desc; /* actually, a mips_extra_func_info_t */\ + int num_args;\ + struct frame_saved_regs *saved_regs; + +#define INIT_EXTRA_FRAME_INFO(fci) init_extra_frame_info(fci) |