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Diffstat (limited to 'gdb/tm-np1.h')
| -rw-r--r-- | gdb/tm-np1.h | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/gdb/tm-np1.h b/gdb/tm-np1.h new file mode 100644 index 0000000..0bb1dcc --- /dev/null +++ b/gdb/tm-np1.h @@ -0,0 +1,515 @@ +/* Parameters for targeting on a Gould NP1, for GDB, the GNU debugger. + Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. + +This file is part of GDB. + +GDB 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 1, or (at your option) +any later version. + +GDB 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 GDB; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#define GOULD_NPL + +#define TARGET_BYTE_ORDER BIG_ENDIAN + +/* N_ENTRY appears in libraries on Gould machines. + Don't know what 0xa4 is; it's mentioned in stab.h + but only in the sdb symbol list. */ +#define IGNORE_SYMBOL(type) (type == N_ENTRY || type == 0xa4) + +/* We don't want the extra gnu symbols on the machine; + they will interfere with the shared segment symbols. */ +#define NO_GNU_STABS + +/* Macro for text-offset and data info (in NPL a.out format). */ +#define TEXTINFO \ + text_offset = N_TXTOFF (exec_coffhdr, exec_aouthdr); \ + exec_data_offset = N_TXTOFF (exec_coffhdr, exec_aouthdr)\ + + exec_aouthdr.a_text + +/* Macro for number of symbol table entries */ +#define NUMBER_OF_SYMBOLS \ + (coffhdr.f_nsyms) + +/* Macro for file-offset of symbol table (in NPL a.out format). */ +#define SYMBOL_TABLE_OFFSET \ + N_SYMOFF (coffhdr) + +/* Macro for file-offset of string table (in NPL a.out format). */ +#define STRING_TABLE_OFFSET \ + (N_STROFF (coffhdr)) + +/* Macro to store the length of the string table data in INTO. */ +#define READ_STRING_TABLE_SIZE(INTO) \ + { INTO = hdr.a_stsize; } + +/* Macro to declare variables to hold the file's header data. */ +#define DECLARE_FILE_HEADERS struct exec hdr; \ + FILHDR coffhdr + +/* Macro to read the header data from descriptor DESC and validate it. + NAME is the file name, for error messages. */ +#define READ_FILE_HEADERS(DESC, NAME) \ +{ val = myread (DESC, &coffhdr, sizeof coffhdr); \ + if (val < 0) \ + perror_with_name (NAME); \ + val = myread (DESC, &hdr, sizeof hdr); \ + if (val < 0) \ + perror_with_name (NAME); \ + if (coffhdr.f_magic != GNP1MAGIC) \ + error ("File \"%s\" not in coff executable format.", NAME); \ + if (N_BADMAG (hdr)) \ + error ("File \"%s\" not in executable format.", NAME); } + +/* Define COFF and other symbolic names needed on NP1 */ +#define NS32GMAGIC GNP1MAGIC +#define NS32SMAGIC GPNMAGIC + +/* 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 DBX format. */ +#define READ_DBX_FORMAT + +/* Address of blocks in N_LBRAC and N_RBRAC symbols are absolute addresses, + not relative to start of source address. */ +#define BLOCK_ADDRESS_ABSOLUTE + +/* Offset from address of function to start of its code. + Zero on most machines. */ +#define FUNCTION_START_OFFSET 8 + +/* Advance PC across any function entry prologue instructions + to reach some "real" code. One NPL we can have one two startup + sequences depending on the size of the local stack: + + Either: + "suabr b2, #" + of + "lil r4, #", "suabr b2, #(r4)" + + "lwbr b6, #", "stw r1, 8(b2)" + Optional "stwbr b3, c(b2)" + Optional "trr r2,r7" (Gould first argument register passing) + or + Optional "stw r2,8(b3)" (Gould first argument register passing) + */ +#define SKIP_PROLOGUE(pc) { \ + register int op = read_memory_integer ((pc), 4); \ + if ((op & 0xffff0000) == 0xFA0B0000) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if ((op & 0xffff0000) == 0x59400000) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if ((op & 0xffff0000) == 0x5F000000) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if (op == 0xD4820008) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if (op == 0x5582000C) { \ + pc += 4; \ + op = read_memory_integer ((pc), 2); \ + if (op == 0x2fa0) { \ + pc += 2; \ + } else { \ + op = read_memory_integer ((pc), 4); \ + if (op == 0xd5030008) { \ + pc += 4; \ + } \ + } \ + } else { \ + op = read_memory_integer ((pc), 2); \ + if (op == 0x2fa0) { \ + pc += 2; \ + } \ + } \ + } \ + } \ + } \ + } \ + if ((op & 0xffff0000) == 0x59000000) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if ((op & 0xffff0000) == 0x5F000000) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if (op == 0xD4820008) { \ + pc += 4; \ + op = read_memory_integer ((pc), 4); \ + if (op == 0x5582000C) { \ + pc += 4; \ + op = read_memory_integer ((pc), 2); \ + if (op == 0x2fa0) { \ + pc += 2; \ + } else { \ + op = read_memory_integer ((pc), 4); \ + if (op == 0xd5030008) { \ + pc += 4; \ + } \ + } \ + } else { \ + op = read_memory_integer ((pc), 2); \ + if (op == 0x2fa0) { \ + pc += 2; \ + } \ + } \ + } \ + } \ + } \ +} + +/* Immediately after a function call, return the saved pc. + Can't go through the frames for this because on some machines + the new frame is not set up until the new function executes + some instructions. True on NPL! Return address is in R1. + The true return address is REALLY 4 past that location! */ +#define SAVED_PC_AFTER_CALL(frame) \ + (read_register(R1_REGNUM) + 4) + +/* Address of end of stack space. */ +#define STACK_END_ADDR 0x7fffc000 + +/* Stack grows downward. */ +#define INNER_THAN < + +/* Sequence of bytes for breakpoint instruction. + This is padded out to the size of a machine word. When it was just + {0x28, 0x09} it gave problems if hit breakpoint on returning from a + function call. */ +#define BREAKPOINT {0x28, 0x09, 0x0, 0x0} + +/* 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 2 + +/* Nonzero if instruction at PC is a return instruction. "bu 4(r1)" */ +#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0x40100004) + +/* Return 1 if P points to an invalid floating point value. */ +#define INVALID_FLOAT(p, len) ((*(short *)p & 0xff80) == 0x8000) + +/* Say how long (ordinary) registers are. */ +#define REGISTER_TYPE long + +/* Size of bytes of vector register (NP1 only), 32 elements * sizeof(int) */ +#define VR_SIZE 128 + +/* Number of machine registers */ +#define NUM_REGS 27 +#define NUM_GEN_REGS 16 +#define NUM_CPU_REGS 4 +#define NUM_VECTOR_REGS 7 + +/* 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", \ + "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", \ + "sp", "ps", "pc", "ve", \ + "v1", "v2", "v3", "v4", "v5", "v6", "v7", \ +} + +/* 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 R1_REGNUM 1 /* Gr1 => return address of caller */ +#define R2_REGNUM 2 /* Gr2 => return value from function */ +#define R4_REGNUM 4 /* Gr4 => register save area */ +#define R5_REGNUM 5 /* Gr5 => register save area */ +#define R6_REGNUM 6 /* Gr6 => register save area */ +#define R7_REGNUM 7 /* Gr7 => register save area */ +#define B1_REGNUM 9 /* Br1 => start of this code routine */ +#define SP_REGNUM 10 /* Br2 == (sp) */ +#define AP_REGNUM 11 /* Br3 == (ap) */ +#define FP_REGNUM 16 /* A copy of Br2 saved in trap */ +#define PS_REGNUM 17 /* Contains processor status */ +#define PC_REGNUM 18 /* Contains program counter */ +#define VE_REGNUM 19 /* Vector end (user setup) register */ +#define V1_REGNUM 20 /* First vector register */ +#define V7_REGNUM 26 /* First vector register */ + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. */ +#define REGISTER_BYTES \ + (NUM_GEN_REGS*4 + NUM_VECTOR_REGS*VR_SIZE + NUM_CPU_REGS*4) + +/* Index within `registers' of the first byte of the space for + register N. */ +#define REGISTER_BYTE(N) \ + (((N) < V1_REGNUM) ? ((N) * 4) : (((N) - V1_REGNUM) * VR_SIZE) + 80) + +/* Number of bytes of storage in the actual machine representation + for register N. On the NP1, all normal regs are 4 bytes, but + the vector registers are VR_SIZE*4 bytes long. */ +#define REGISTER_RAW_SIZE(N) \ + (((N) < V1_REGNUM) ? 4 : VR_SIZE) + +/* Number of bytes of storage in the program's representation + for register N. On the NP1, all regs are 4 bytes. */ +#define REGISTER_VIRTUAL_SIZE(N) \ + (((N) < V1_REGNUM) ? 4 : VR_SIZE) + +/* Largest value REGISTER_RAW_SIZE can have. */ +#define MAX_REGISTER_RAW_SIZE VR_SIZE + +/* Largest value REGISTER_VIRTUAL_SIZE can have. */ +#define MAX_REGISTER_VIRTUAL_SIZE VR_SIZE + +/* 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), REGISTER_RAW_SIZE(REGNUM)); + +/* 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), REGISTER_VIRTUAL_SIZE(REGNUM)); + +/* Return the GDB type object for the "standard" data type + of data in register N. */ +#define REGISTER_VIRTUAL_TYPE(N) \ + ((N) > VE_REGNUM ? builtin_type_np1_vector : builtin_type_int) +extern struct type *builtin_type_np1_vector; + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function. + + On this machine this is a no-op, because gcc isn't used on it + yet. So this calling convention is not used. */ + +#define STORE_STRUCT_RETURN(ADDR, SP) push_word(SP + 8, ADDR) + +/* Extract from an arrary 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) \ + bcopy (((int *)(REGBUF)) + 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 (R2_REGNUM), 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) + 2)) + +/* Both gcc and cc return small structs in registers (i.e. in GDB + terminology, small structs don't use the struct return convention). */ +#define USE_STRUCT_CONVENTION(gcc_p, type) (TYPE_LENGTH(type) > 8) + +/* 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. */ + +/* In the case of the NPL, the frame's norminal address is Br2 and the + previous routines frame is up the stack X bytes, where X is the + value stored in the code function header xA(Br1). */ +#define FRAME_CHAIN(thisframe) (findframe(thisframe)) + +#define FRAME_CHAIN_VALID(chain, thisframe) \ + (chain != 0 && chain != (thisframe)->frame) + +#define FRAME_CHAIN_COMBINE(chain, thisframe) \ + (chain) + +/* Define other aspects of the stack frame on NPL. */ +#define FRAME_SAVED_PC(FRAME) \ + (read_memory_integer ((FRAME)->frame + 8, 4)) + +#define FRAME_ARGS_ADDRESS(fi) \ + ((fi)->next_frame ? \ + read_memory_integer ((fi)->frame + 12, 4) : \ + read_register (AP_REGNUM)) + +#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) + +/* Set VAL to the number of args passed to frame described by FI. + Can set VAL to -1, meaning no way to tell. */ + +/* We can check the stab info to see how + many arg we have. No info in stack will tell us */ +#define FRAME_NUM_ARGS(val,fi) (val = findarg(fi)) + +/* Return number of bytes at start of arglist that are not really args. */ +#define FRAME_ARGS_SKIP 8 + +/* 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) \ +{ \ + bzero (&frame_saved_regs, sizeof frame_saved_regs); \ + (frame_saved_regs).regs[SP_REGNUM] = framechain (frame_info); \ + (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 8; \ + (frame_saved_regs).regs[R4_REGNUM] = (frame_info)->frame + 0x30; \ + (frame_saved_regs).regs[R5_REGNUM] = (frame_info)->frame + 0x34; \ + (frame_saved_regs).regs[R6_REGNUM] = (frame_info)->frame + 0x38; \ + (frame_saved_regs).regs[R7_REGNUM] = (frame_info)->frame + 0x3C; \ +} + +/* Things needed for making the inferior call functions. */ + +#define CANNOT_EXECUTE_STACK + +/* 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; \ + for (regnum = 0; regnum < FP_REGNUM; regnum++) \ + sp = push_word (sp, read_register (regnum)); \ + sp = push_word (sp, read_register (PS_REGNUM)); \ + sp = push_word (sp, read_register (PC_REGNUM)); \ + write_register (SP_REGNUM, sp);} + +/* Discard from the stack the innermost frame, + restoring all saved registers. */ + +#define POP_FRAME \ +{ CORE_ADDR sp = read_register(SP_REGNUM); \ + REGISTER_TYPE reg; \ + int regnum; \ + for(regnum = 0;regnum < FP_REGNUM;regnum++){ \ + sp-=sizeof(REGISTER_TYPE); \ + read_memory(sp,®,sizeof(REGISTER_TYPE)); \ + write_register(regnum,reg);} \ + sp-=sizeof(REGISTER_TYPE); \ + read_memory(sp,®,sizeof(REGISTER_TYPE)); \ + write_register(PS_REGNUM,reg); \ + sp-=sizeof(REGISTER_TYPE); \ + read_memory(sp,®,sizeof(REGISTER_TYPE)); \ + write_register(PC_REGNUM,reg);} + +/* MJD - Size of dummy frame pushed onto stack by PUSH_DUMMY_FRAME */ + +#define DUMMY_FRAME_SIZE (0x48) + +/* MJD - The sequence of words in the instructions is + halt + halt + halt + halt + subr b2,stack size,0 grab stack space for dummy call + labr b3,x0(b2),0 set AP_REGNUM to point at arguments + lw r2,x8(b3),0 load r2 with first argument + lwbr b1,arguments size(b2),0 load address of function to be called + brlnk r1,x8(b1),0 call function + halt + halt + labr b2,stack size(b2),0 give back stack + break break + */ + +#define CALL_DUMMY {0x00000000, \ + 0x00000000, \ + 0x59000000, \ + 0x598a0000, \ + 0xb5030008, \ + 0x5c820000, \ + 0x44810008, \ + 0x00000000, \ + 0x590a0000, \ + 0x28090000 } + +#define CALL_DUMMY_LENGTH 40 + +#define CALL_DUMMY_START_OFFSET 8 + +#define CALL_DUMMY_STACK_ADJUST 8 + +/* MJD - Fixup CALL_DUMMY for the specific function call. + OK heres the problems + 1) On a trap there are two copies of the stack pointer, one in SP_REGNUM + which is read/write and one in FP_REGNUM which is only read. It seems + that when restarting the GOULD NP1 uses FP_REGNUM's value. + 2) Loading function address into b1 looks a bit difficult if bigger than + 0x0000fffc, infact from what I can tell the compiler sets up table of + function address in base3 through which function calls are referenced. + + OK my solutions + Calculate the size of the dummy stack frame and do adjustments of + SP_REGNUM in the dummy call. + Push function address onto the stack and load it in the dummy call + */ + +#define FIX_CALL_DUMMY(dummyname, sp, fun, nargs, args, type, gcc_p) \ + { int i;\ + int arg_len = 0, total_len;\ + old_sp = push_word(old_sp,fun);\ + for(i = nargs - 1;i >= 0;i--)\ + arg_len += TYPE_LENGTH (VALUE_TYPE (value_arg_coerce (args[i])));\ + if(struct_return)\ + arg_len += TYPE_LENGTH(value_type);\ + total_len = DUMMY_FRAME_SIZE+CALL_DUMMY_STACK_ADJUST+4+arg_len;\ + dummyname[0] += total_len;\ + dummyname[2] += total_len;\ + dummyname[5] += arg_len+CALL_DUMMY_STACK_ADJUST;\ + dummyname[8] += total_len;} + +/* MJD - So the stack should end up looking like this + + | Normal stack frame | + | from normal program | + | flow | + +---------------------+ <- Final sp - 0x08 - argument size + | | - 0x4 - dummy_frame_size + | Pushed dummy frame | + | b0-b7, r0-r7 | + | pc and ps | + | | + +---------------------+ + | Function address | + +---------------------+ <- Final sp - 0x8 - arguments size + | | + | | + | | + | Arguments to | + | Function | + | | + | | + | | + +---------------------+ <- Final sp - 0x8 + | Dummy_stack_adjust | + +---------------------+ <- Final sp + | | + | where call will | + | build frame | +*/ |