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Diffstat (limited to 'gdb/config/convex/tm-convex.h')
| -rw-r--r-- | gdb/config/convex/tm-convex.h | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/gdb/config/convex/tm-convex.h b/gdb/config/convex/tm-convex.h new file mode 100644 index 00000000000..5eb9f6ed89e --- /dev/null +++ b/gdb/config/convex/tm-convex.h @@ -0,0 +1,511 @@ +/* Definitions to make GDB run on Convex Unix (4bsd) + Copyright 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#define TARGET_BYTE_ORDER BIG_ENDIAN + +/* There is come problem with the debugging symbols generated by the + compiler such that the debugging symbol for the first line of a + function overlap with the function prologue. */ +#define PROLOGUE_FIRSTLINE_OVERLAP + +/* When convex pcc says CHAR or SHORT, it provides the correct address. */ + +#define BELIEVE_PCC_PROMOTION 1 + +/* Symbol types to ignore. */ +/* 0xc4 is N_MONPT. Use the numeric value for the benefit of people + with (rather) old OS's. */ +#define IGNORE_SYMBOL(TYPE) \ + (((TYPE) & ~N_EXT) == N_TBSS \ + || ((TYPE) & ~N_EXT) == N_TDATA \ + || ((TYPE) & ~N_EXT) == 0xc4) + +/* 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. + Convex prolog is: + [sub.w #-,sp] in one of 3 possible sizes + [mov psw,- fc/vc main program prolog + and #-,- (skip it because the "mov psw" saves the + mov -,psw] T bit, so continue gets a surprise trap) + [and #-,sp] fc/vc O2 main program prolog + [ld.- -(ap),-] pcc/gcc register arg loads +*/ + +#define SKIP_PROLOGUE(pc) \ +{ int op, ix; \ + op = read_memory_integer (pc, 2); \ + if ((op & 0xffc7) == 0x5ac0) pc += 2; \ + else if (op == 0x1580) pc += 4; \ + else if (op == 0x15c0) pc += 6; \ + if ((read_memory_integer (pc, 2) & 0xfff8) == 0x7c40 \ + && (read_memory_integer (pc + 2, 2) & 0xfff8) == 0x1240 \ + && (read_memory_integer (pc + 8, 2) & 0xfff8) == 0x7c48) \ + pc += 10; \ + if (read_memory_integer (pc, 2) == 0x1240) pc += 6; \ + for (;;) { \ + op = read_memory_integer (pc, 2); \ + ix = (op >> 3) & 7; \ + if (ix != 6) break; \ + if ((op & 0xfcc0) == 0x3000) pc += 4; \ + else if ((op & 0xfcc0) == 0x3040) pc += 6; \ + else if ((op & 0xfcc0) == 0x2800) pc += 4; \ + else if ((op & 0xfcc0) == 0x2840) pc += 6; \ + else break;}} + +/* Immediately after a function call, return the saved pc. + (ignore frame and return *$sp so we can handle both calls and callq) */ + +#define SAVED_PC_AFTER_CALL(frame) \ + read_memory_integer (read_register (SP_REGNUM), 4) + +/* Address of end of stack space. + This is ((USRSTACK + 0xfff) & -0x1000)) from <convex/vmparam.h> but + that expression depends on the kernel version; instead, fetch a + page-zero pointer and get it from that. This will be invalid if + they ever change the way bkpt signals are delivered. */ + +#define STACK_END_ADDR (0xfffff000 & *(unsigned *) 0x80000050) + +/* User-mode traps push an extended rtn block, + then fault with one of the following PCs */ + +#define is_trace_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000040)) <= 4) +#define is_arith_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000044)) <= 4) +#define is_break_pc(pc) ((unsigned) ((pc) - (*(int *) 0x80000050)) <= 4) + +/* We need to manipulate trap bits in the psw */ + +#define PSW_TRAP_FLAGS 0x69670000 +#define PSW_T_BIT 0x08000000 +#define PSW_S_BIT 0x01000000 + +/* Stack grows downward. */ + +#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) + +/* Sequence of bytes for breakpoint instruction. (bkpt) */ + +#define BREAKPOINT {0x7d,0x50} + +/* Amount PC must be decremented by after a breakpoint. + This is often the number of bytes in BREAKPOINT but not always. + (The break PC needs to be decremented by 2, but we do it when the + break frame is recognized and popped. That way gdb can tell breaks + from trace traps with certainty.) */ + +#define DECR_PC_AFTER_BREAK 0 + +/* 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 8 + +/* Number of machine registers */ + +#define NUM_REGS 26 + +/* Initializer for an array of names of registers. + There should be NUM_REGS strings in this initializer. */ + +#define REGISTER_NAMES {"pc","psw","fp","ap","a5","a4","a3","a2","a1","sp",\ + "s7","s6","s5","s4","s3","s2","s1","s0",\ + "S7","S6","S5","S4","S3","S2","S1","S0"} + +/* 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 S0_REGNUM 25 /* the real S regs */ +#define S7_REGNUM 18 +#define s0_REGNUM 17 /* low-order halves of S regs */ +#define s7_REGNUM 10 +#define SP_REGNUM 9 /* A regs */ +#define A1_REGNUM 8 +#define A5_REGNUM 4 +#define AP_REGNUM 3 +#define FP_REGNUM 2 /* Contains address of executing stack frame */ +#define PS_REGNUM 1 /* Contains processor status */ +#define PC_REGNUM 0 /* Contains program counter */ + +/* convert dbx stab register number (from `r' declaration) to a gdb REGNUM */ + +#define STAB_REG_TO_REGNUM(value) \ + ((value) < 8 ? S0_REGNUM - (value) : SP_REGNUM - ((value) - 8)) + +/* Vector register numbers, not handled as ordinary regs. + They are treated as convenience variables whose values are read + from the inferior when needed. */ + +#define V0_REGNUM 0 +#define V7_REGNUM 7 +#define VM_REGNUM 8 +#define VS_REGNUM 9 +#define VL_REGNUM 10 + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. */ +#define REGISTER_BYTES (4*10 + 8*8) + +/* Index within `registers' of the first byte of the space for + register N. + NB: must match structure of struct syscall_context for correct operation */ + +#define REGISTER_BYTE(N) ((N) < s7_REGNUM ? 4*(N) : \ + (N) < S7_REGNUM ? 44 + 8 * ((N)-s7_REGNUM) : \ + 40 + 8 * ((N)-S7_REGNUM)) + +/* Number of bytes of storage in the actual machine representation + for register N. */ + +#define REGISTER_RAW_SIZE(N) ((N) < S7_REGNUM ? 4 : 8) + +/* Number of bytes of storage in the program's representation + for register N. */ + +#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) + +/* Largest value REGISTER_RAW_SIZE can have. */ + +#define MAX_REGISTER_RAW_SIZE 8 + +/* Largest value REGISTER_VIRTUAL_SIZE can have. */ + +#define MAX_REGISTER_VIRTUAL_SIZE 8 + +/* Return the GDB type object for the "standard" data type + of data in register N. */ + +#define REGISTER_VIRTUAL_TYPE(N) \ + ((N) < S7_REGNUM ? builtin_type_int : builtin_type_long_long) + +/* 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 (A1_REGNUM, (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, &((char *) REGBUF) [REGISTER_BYTE (S0_REGNUM) + \ + 8 - TYPE_LENGTH (TYPE)],\ + 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 (S0_REGNUM), VALBUF, 8) + +/* 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 *) & ((char *) REGBUF) [REGISTER_BYTE (s0_REGNUM)]) + +/* Define trapped internal variable hooks to read and write + vector and communication registers. */ + +#define IS_TRAPPED_INTERNALVAR is_trapped_internalvar +#define VALUE_OF_TRAPPED_INTERNALVAR value_of_trapped_internalvar +#define SET_TRAPPED_INTERNALVAR set_trapped_internalvar + +extern struct value *value_of_trapped_internalvar (); + +/* Hooks to read data from soff exec and core files, + and to describe the files. */ + +#define FILES_INFO_HOOK print_maps + +/* Hook to call to print a typeless integer value, normally printed in decimal. + For convex, use hex instead if the number looks like an address. */ + +#define PRINT_TYPELESS_INTEGER decout + +/* For the native compiler, variables for a particular lexical context + are listed after the beginning LBRAC instead of before in the + executables list of symbols. Using "gcc_compiled." to distinguish + between GCC and native compiler doesn't work on Convex because the + linker sorts the symbols to put "gcc_compiled." in the wrong place. + desc is nonzero for native, zero for gcc. */ +#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) (desc != 0) + +/* Pcc occaisionally puts an SO where there should be an SOL. */ +#define PCC_SOL_BROKEN + +/* Describe the pointer in each stack frame to the previous stack frame + (its caller). */ + +/* FRAME_CHAIN takes a frame_info with a frame's nominal address in fi->frame, + and produces the frame's chain-pointer. */ + +/* (caller fp is saved at 8(fp)) */ + +#define FRAME_CHAIN(fi) (read_memory_integer ((fi)->frame + 8, 4)) + +/* Define other aspects of the stack frame. */ + +/* We need the boundaries of the text in the exec file, as a kludge, + for FRAMELESS_FUNCTION_INVOCATION and CALL_DUMMY_LOCATION. */ + +#define NEED_TEXT_START_END 1 + +/* 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 convex, check at the return address for `callq' -- if so, frameless, + otherwise, not. */ + +#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ +{ \ + extern CORE_ADDR text_start, text_end; \ + CORE_ADDR call_addr = SAVED_PC_AFTER_CALL (FI); \ + (FRAMELESS) = (call_addr >= text_start && call_addr < text_end \ + && read_memory_integer (call_addr - 6, 1) == 0x22); \ +} + +#define FRAME_SAVED_PC(fi) (read_memory_integer ((fi)->frame, 4)) + +#define FRAME_ARGS_ADDRESS(fi) (read_memory_integer ((fi)->frame + 12, 4)) + +#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 = read_memory_integer (FRAME_ARGS_ADDRESS (fi) - 4, 4); \ + if (numargs < 0 || numargs >= 256) numargs = -1;} + +/* 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. */ + +/* Normal (short) frames save only PC, FP, (callee's) AP. To reasonably + handle gcc and pcc register variables, scan the code following the + call for the instructions the compiler inserts to reload register + variables from stack slots and record the stack slots as the saved + locations of those registers. This will occasionally identify some + random load as a saved register; this is harmless. vc does not + declare its register allocation actions in the stabs. */ + +#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ +{ register int regnum; \ + register int frame_length = /* 3 short, 2 long, 1 extended, 0 context */\ + (read_memory_integer ((frame_info)->frame + 4, 4) >> 25) & 3; \ + register CORE_ADDR frame_fp = \ + read_memory_integer ((frame_info)->frame + 8, 4); \ + register CORE_ADDR next_addr; \ + memset (&frame_saved_regs, '\0', sizeof frame_saved_regs); \ + (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 0; \ + (frame_saved_regs).regs[PS_REGNUM] = (frame_info)->frame + 4; \ + (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame + 8; \ + (frame_saved_regs).regs[AP_REGNUM] = frame_fp + 12; \ + next_addr = (frame_info)->frame + 12; \ + if (frame_length < 3) \ + for (regnum = A5_REGNUM; regnum < SP_REGNUM; ++regnum) \ + (frame_saved_regs).regs[regnum] = (next_addr += 4); \ + if (frame_length < 2) \ + (frame_saved_regs).regs[SP_REGNUM] = (next_addr += 4); \ + next_addr -= 4; \ + if (frame_length < 3) \ + for (regnum = S7_REGNUM; regnum < S0_REGNUM; ++regnum) \ + (frame_saved_regs).regs[regnum] = (next_addr += 8); \ + if (frame_length < 2) \ + (frame_saved_regs).regs[S0_REGNUM] = (next_addr += 8); \ + else \ + (frame_saved_regs).regs[SP_REGNUM] = next_addr + 8; \ + if (frame_length == 3) { \ + CORE_ADDR pc = read_memory_integer ((frame_info)->frame, 4); \ + int op, ix, disp; \ + op = read_memory_integer (pc, 2); \ + if ((op & 0xffc7) == 0x1480) pc += 4; /* add.w #-,sp */ \ + else if ((op & 0xffc7) == 0x58c0) pc += 2; /* add.w #-,sp */ \ + op = read_memory_integer (pc, 2); \ + if ((op & 0xffc7) == 0x2a06) pc += 4; /* ld.w -,ap */ \ + for (;;) { \ + op = read_memory_integer (pc, 2); \ + ix = (op >> 3) & 7; \ + if ((op & 0xfcc0) == 0x2800) { /* ld.- -,ak */ \ + regnum = SP_REGNUM - (op & 7); \ + disp = read_memory_integer (pc + 2, 2); \ + pc += 4;} \ + else if ((op & 0xfcc0) == 0x2840) { /* ld.- -,ak */ \ + regnum = SP_REGNUM - (op & 7); \ + disp = read_memory_integer (pc + 2, 4); \ + pc += 6;} \ + if ((op & 0xfcc0) == 0x3000) { /* ld.- -,sk */ \ + regnum = S0_REGNUM - (op & 7); \ + disp = read_memory_integer (pc + 2, 2); \ + pc += 4;} \ + else if ((op & 0xfcc0) == 0x3040) { /* ld.- -,sk */ \ + regnum = S0_REGNUM - (op & 7); \ + disp = read_memory_integer (pc + 2, 4); \ + pc += 6;} \ + else if ((op & 0xff00) == 0x7100) { /* br crossjump */ \ + pc += 2 * (char) op; \ + continue;} \ + else if (op == 0x0140) { /* jmp crossjump */ \ + pc = read_memory_integer (pc + 2, 4); \ + continue;} \ + else break; \ + if ((frame_saved_regs).regs[regnum]) \ + break; \ + if (ix == 7) disp += frame_fp; \ + else if (ix == 6) disp += read_memory_integer (frame_fp + 12, 4); \ + else if (ix != 0) break; \ + (frame_saved_regs).regs[regnum] = \ + disp - 8 + (1 << ((op >> 8) & 3)); \ + if (regnum >= S7_REGNUM) \ + (frame_saved_regs).regs[regnum - S0_REGNUM + s0_REGNUM] = \ + disp - 4 + (1 << ((op >> 8) & 3)); \ + } \ + } \ +} + +/* Things needed for making the inferior call functions. */ + +#define CALL_DUMMY_LOCATION BEFORE_TEXT_END + +/* 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; \ + char buf[8]; \ + long word; \ + for (regnum = S0_REGNUM; regnum >= S7_REGNUM; --regnum) { \ + read_register_bytes (REGISTER_BYTE (regnum), buf, 8); \ + sp = push_bytes (sp, buf, 8);} \ + for (regnum = SP_REGNUM; regnum >= FP_REGNUM; --regnum) { \ + word = read_register (regnum); \ + sp = push_bytes (sp, &word, 4);} \ + word = (read_register (PS_REGNUM) &~ (3<<25)) | (1<<25); \ + sp = push_bytes (sp, &word, 4); \ + word = read_register (PC_REGNUM); \ + sp = push_bytes (sp, &word, 4); \ + write_register (SP_REGNUM, sp); \ + write_register (FP_REGNUM, sp); \ + write_register (AP_REGNUM, sp);} + +/* Discard from the stack the innermost frame, restoring all registers. */ + +#define POP_FRAME do {\ + register CORE_ADDR fp = read_register (FP_REGNUM); \ + register int regnum; \ + register int frame_length = /* 3 short, 2 long, 1 extended, 0 context */ \ + (read_memory_integer (fp + 4, 4) >> 25) & 3; \ + char buf[8]; \ + write_register (PC_REGNUM, read_memory_integer (fp, 4)); \ + write_register (PS_REGNUM, read_memory_integer (fp += 4, 4)); \ + write_register (FP_REGNUM, read_memory_integer (fp += 4, 4)); \ + write_register (AP_REGNUM, read_memory_integer (fp += 4, 4)); \ + if (frame_length < 3) \ + for (regnum = A5_REGNUM; regnum < SP_REGNUM; ++regnum) \ + write_register (regnum, read_memory_integer (fp += 4, 4)); \ + if (frame_length < 2) \ + write_register (SP_REGNUM, read_memory_integer (fp += 4, 4)); \ + fp -= 4; \ + if (frame_length < 3) \ + for (regnum = S7_REGNUM; regnum < S0_REGNUM; ++regnum) { \ + read_memory (fp += 8, buf, 8); \ + write_register_bytes (REGISTER_BYTE (regnum), buf, 8);} \ + if (frame_length < 2) { \ + read_memory (fp += 8, buf, 8); \ + write_register_bytes (REGISTER_BYTE (regnum), buf, 8);} \ + else write_register (SP_REGNUM, fp + 8); \ + flush_cached_frames (); \ +} while (0) + +/* This sequence of words is the instructions + mov sp,ap + pshea 69696969 + calls 32323232 + bkpt + Note this is 16 bytes. */ + +#define CALL_DUMMY {0x50860d4069696969LL,0x2140323232327d50LL} + +#define CALL_DUMMY_LENGTH 16 + +#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, type, gcc_p) \ +{ *(int *)((char *) dummyname + 4) = nargs; \ + *(int *)((char *) dummyname + 10) = fun; } + +/* Defs to read soff symbol tables, see dbxread.c */ + +#define NUMBER_OF_SYMBOLS ((long) opthdr.o_nsyms) +#define STRING_TABLE_OFFSET ((long) filehdr.h_strptr) +#define SYMBOL_TABLE_OFFSET ((long) opthdr.o_symptr) +#define STRING_TABLE_SIZE ((long) filehdr.h_strsiz) +#define SIZE_OF_TEXT_SEGMENT ((long) txthdr.s_size) +#define ENTRY_POINT ((long) opthdr.o_entry) + +#define READ_STRING_TABLE_SIZE(BUFFER) \ + (BUFFER = STRING_TABLE_SIZE) + +#define DECLARE_FILE_HEADERS \ + FILEHDR filehdr; \ + OPTHDR opthdr; \ + SCNHDR txthdr + +#define READ_FILE_HEADERS(DESC,NAME) \ +{ \ + int n; \ + val = myread (DESC, &filehdr, sizeof filehdr); \ + if (val < 0) \ + perror_with_name (NAME); \ + if (! IS_SOFF_MAGIC (filehdr.h_magic)) \ + error ("%s: not an executable file.", NAME); \ + lseek (DESC, 0L, 0); \ + if (myread (DESC, &filehdr, sizeof filehdr) < 0) \ + perror_with_name (NAME); \ + if (myread (DESC, &opthdr, filehdr.h_opthdr) <= 0) \ + perror_with_name (NAME); \ + for (n = 0; n < filehdr.h_nscns; n++) \ + { \ + if (myread (DESC, &txthdr, sizeof txthdr) < 0) \ + perror_with_name (NAME); \ + if ((txthdr.s_flags & S_TYPMASK) == S_TEXT) \ + break; \ + } \ +} |