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Diffstat (limited to 'gdb/m-pn.h')
| -rw-r--r-- | gdb/m-pn.h | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/gdb/m-pn.h b/gdb/m-pn.h new file mode 100644 index 0000000..6e0bf76 --- /dev/null +++ b/gdb/m-pn.h @@ -0,0 +1,486 @@ +/* Parameters for execution on a Gould PN, for GDB, the GNU debugger. + Copyright (C) 1986, 1987 Free Software Foundation, Inc. + +GDB is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY. No author or distributor accepts responsibility to anyone +for the consequences of using it or for whether it serves any +particular purpose or works at all, unless he says so in writing. +Refer to the GDB General Public License for full details. + +Everyone is granted permission to copy, modify and redistribute GDB, +but only under the conditions described in the GDB General Public +License. A copy of this license is supposed to have been given to you +along with GDB so you can know your rights and responsibilities. It +should be in a file named COPYING. Among other things, the copyright +notice and this notice must be preserved on all copies. + +In other words, go ahead and share GDB, but don't try to stop +anyone else from sharing it farther. Help stamp out software hoarding! */ + +/* Read file headers properly in core.c */ +#define gould + +/* Macro for text-offset and data info (in PN a.out format). */ +#define TEXTINFO \ + text_offset = N_TXTOFF (exec_coffhdr); \ + exec_data_offset = N_TXTOFF (exec_coffhdr) \ + + exec_aouthdr.a_text + +/* Macro for number of symbol table entries */ +#define END_OF_TEXT_DEFAULT \ + (0xffffff) + +/* Macro for number of symbol table entries */ +#define NUMBER_OF_SYMBOLS \ + (coffhdr.f_nsyms) + +/* Macro for file-offset of symbol table (in usual a.out format). */ +#define SYMBOL_TABLE_OFFSET \ + N_SYMOFF (coffhdr) + +/* Macro for file-offset of string table (in usual a.out format). */ +#define STRING_TABLE_OFFSET \ + (N_STROFF (coffhdr) + sizeof(int)) + +/* 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 old_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 GDPMAGIC +#define NS32SMAGIC PN_MAGIC +#define vprintf printf + +/* Get rid of any system-imposed stack limit if possible. */ +#define SET_STACK_LIMIT_HUGE + +/* 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 + +/* Offset from address of function to start of its code. + Zero on most machines. */ +#define FUNCTION_START_OFFSET 4 + +/* Advance PC across any function entry prologue instructions + to reach some "real" code. One PN we can have one or 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) == 0x580B0000) { \ + 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 PN! Return address is in R1. + Note: true return location is 4 bytes past R1! */ +#define SAVED_PC_AFTER_CALL(frame) \ + (read_register(R1_REGNUM) + 4) + +/* Address of U in kernel space */ +#define KERNEL_U_ADDR 0x3fc000 + +/* Address of end of stack space. */ +#define STACK_END_ADDR 0x480000 + +/* Stack grows downward. */ +#define INNER_THAN < + +/* Sequence of bytes for breakpoint instruction. */ +#define BREAKPOINT {0x28, 0x09} + +/* 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) == 0xEC100004) + +/* 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 + +/* Number of machine registers */ +#define NUM_REGS 19 +#define NUM_GEN_REGS 16 +#define NUM_CPU_REGS 3 + +/* 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", \ +} + +/* 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 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 FP_REGNUM 10 /* Br2 == (sp) */ +#define AP_REGNUM 11 /* Br3 == (ap) */ +#define SP_REGNUM 16 /* A copy of Br2 saved in trap */ +#define PS_REGNUM 17 /* Contains processor status */ +#define PC_REGNUM 18 /* Contains program counter */ + +/* This is a piece of magic that is given a register number REGNO + and as BLOCKEND the address in the system of the end of the user structure + and stores in ADDR the address in the kernel or core dump + of that register. */ +#define REGISTER_U_ADDR(addr, blockend, regno) { \ + addr = blockend + regno * 4; \ + if (regno == PC_REGNUM) addr = blockend - 8 * 4; \ + if (regno == PS_REGNUM) addr = blockend - 7 * 4; \ + if (regno == SP_REGNUM) addr = blockend - 6 * 4; \ +} + +/* 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_CPU_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 the PN, all normal 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 PN, 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), 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) (builtin_type_int) + +/* 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 (REGBUF, 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 (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. + + 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) + +#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 + 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 + 80) + +/* 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[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. */ + +/* 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, read_register (PC_REGNUM)); \ + sp = push_word (sp, read_register (FP_REGNUM)); \ + write_register (FP_REGNUM, sp); \ + for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ + sp = push_word (sp, read_register (regnum)); \ + sp = push_word (sp, read_register (PS_REGNUM)); \ + write_register (SP_REGNUM, sp); } + +/* Discard from the stack the innermost frame, + restoring all saved registers. */ + +#define POP_FRAME \ +{ register CORE_ADDR fp = read_register (FP_REGNUM); \ + register int regnum; \ + struct frame_saved_regs fsr; \ + struct frame_info fi; \ + fi = get_frame_info (fp); \ + get_frame_saved_regs (&fi, &fsr); \ + for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ + if (fsr.regs[regnum]) \ + write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \ + if (fsr.regs[PS_REGNUM]) \ + write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \ + write_register (FP_REGNUM, read_memory_integer (fp, 4)); \ + write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \ + write_register (SP_REGNUM, fp + 8); \ + set_current_frame (read_register (FP_REGNUM)); } + +/* This sequence of words is the instructions: + halt + halt + halt + halt + suabr b2, #<stacksize> + lwbr b6, #con + stw r1, 8(b2) - save caller address, do we care? + lw r2, 60(b2) - arg1 + labr b3, 50(b2) + std r4, 30(b2) - save r4-r7 + std r6, 38(b2) + lwbr b1, #<func> - load function call address + brlnk r1, 8(b1) - call function + halt + halt + ld r4, 30(b2) - restore r4-r7 + ld r6, 38(b2) + + Setup our stack frame, load argumemts, call and then restore registers. +*/ + +#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71} + +#define CALL_DUMMY_LENGTH 28 + +#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, fun, nargs) \ +{ *(int *)((char *) dummyname + 20) = nargs * 4; \ + *(int *)((char *) dummyname + 14) = fun; } + +/* + * No KDB support, Yet! */ +/* Interface definitions for kernel debugger KDB. */ + +/* Map machine fault codes into signal numbers. + First subtract 0, divide by 4, then index in a table. + Faults for which the entry in this table is 0 + are not handled by KDB; the program's own trap handler + gets to handle then. */ + +#define FAULT_CODE_ORIGIN 0 +#define FAULT_CODE_UNITS 4 +#define FAULT_TABLE \ +{ 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \ + 0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \ + 0, 0, 0, 0, 0, 0, 0, 0, \ + SIGILL } + +/* Start running with a stack stretching from BEG to END. + BEG and END should be symbols meaningful to the assembler. + This is used only for kdb. */ + +#define INIT_STACK(beg, end) \ +{ asm (".globl end"); \ + asm ("movel $ end, sp"); \ + asm ("clrl fp"); } + +/* Push the frame pointer register on the stack. */ +#define PUSH_FRAME_PTR \ + asm ("movel fp, -(sp)"); + +/* Copy the top-of-stack to the frame pointer register. */ +#define POP_FRAME_PTR \ + asm ("movl (sp), fp"); + +/* After KDB is entered by a fault, push all registers + that GDB thinks about (all NUM_REGS of them), + so that they appear in order of ascending GDB register number. + The fault code will be on the stack beyond the last register. */ + +#define PUSH_REGISTERS \ +{ asm ("clrw -(sp)"); \ + asm ("pea 10(sp)"); \ + asm ("movem $ 0xfffe,-(sp)"); } + +/* Assuming the registers (including processor status) have been + pushed on the stack in order of ascending GDB register number, + restore them and return to the address in the saved PC register. */ + +#define POP_REGISTERS \ +{ asm ("subil $8,28(sp)"); \ + asm ("movem (sp),$ 0xffff"); \ + asm ("rte"); } |