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c906108c21
binutils-gdb/gdb/gould-tdep.c
Stan Shebs c906108c21 Initial creation of sourceware repository
1999-04-16 01:35:26 +00:00

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/* OBSOLETE /* GOULD RISC target-dependent code for GDB, the GNU debugger. */
/* OBSOLETE Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc. */
/* OBSOLETE */
/* OBSOLETE This file is part of GDB. */
/* OBSOLETE */
/* OBSOLETE This program is free software; you can redistribute it and/or modify */
/* OBSOLETE it under the terms of the GNU General Public License as published by */
/* OBSOLETE the Free Software Foundation; either version 2 of the License, or */
/* OBSOLETE (at your option) any later version. */
/* OBSOLETE */
/* OBSOLETE This program is distributed in the hope that it will be useful, */
/* OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* OBSOLETE GNU General Public License for more details. */
/* OBSOLETE */
/* OBSOLETE You should have received a copy of the GNU General Public License */
/* OBSOLETE along with this program; if not, write to the Free Software */
/* OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *x/ */
/* OBSOLETE */
/* OBSOLETE #include "defs.h" */
/* OBSOLETE #include "symtab.h" */
/* OBSOLETE #include "frame.h" */
/* OBSOLETE #include "gdbcore.h" */
/* OBSOLETE #if defined GOULD_PN */
/* OBSOLETE #include "opcode/pn.h" */
/* OBSOLETE #else */
/* OBSOLETE #include "opcode/np1.h" */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE /* GOULD RISC instructions are never longer than this many bytes. *x/ */
/* OBSOLETE #define MAXLEN 4 */
/* OBSOLETE */
/* OBSOLETE /* Number of elements in the opcode table. *x/ */
/* OBSOLETE #define NOPCODES (sizeof gld_opcodes / sizeof gld_opcodes[0]) */
/* OBSOLETE */
/* OBSOLETE int */
/* OBSOLETE gould_frame_chain_valid (chain, fi) */
/* OBSOLETE CORE_ADDR chain; */
/* OBSOLETE struct frame_info *fi; /* not used here *x/ */
/* OBSOLETE { */
/* OBSOLETE return (chain != 0 && chain != (thisframe)->frame); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Both gcc and cc return small structs in registers (i.e. in GDB */
/* OBSOLETE terminology, small structs don't use the struct return convention). *x/ */
/* OBSOLETE int */
/* OBSOLETE gould_use_struct_convention (gcc_p, type) */
/* OBSOLETE int gcc_p; */
/* OBSOLETE struct type *type; */
/* OBSOLETE { */
/* OBSOLETE return (TYPE_LENGTH(type) > 8); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE */
/* OBSOLETE */
/* OBSOLETE /* Print the GOULD instruction at address MEMADDR in debugged memory, */
/* OBSOLETE on STREAM. Returns length of the instruction, in bytes. *x/ */
/* OBSOLETE */
/* OBSOLETE int */
/* OBSOLETE gould_print_insn (memaddr, stream) */
/* OBSOLETE CORE_ADDR memaddr; */
/* OBSOLETE FILE *stream; */
/* OBSOLETE { */
/* OBSOLETE unsigned char buffer[MAXLEN]; */
/* OBSOLETE register int i; */
/* OBSOLETE register char *d; */
/* OBSOLETE register int bestmask; */
/* OBSOLETE unsigned best; */
/* OBSOLETE int temp, index, bestlen; */
/* OBSOLETE */
/* OBSOLETE read_memory (memaddr, buffer, MAXLEN); */
/* OBSOLETE */
/* OBSOLETE bestmask = 0; */
/* OBSOLETE index = -1; */
/* OBSOLETE best = 0xffffffff; */
/* OBSOLETE for (i = 0; i < NOPCODES; i++) */
/* OBSOLETE { */
/* OBSOLETE register unsigned int opcode = gld_opcodes[i].opcode; */
/* OBSOLETE register unsigned int mask = gld_opcodes[i].mask; */
/* OBSOLETE register unsigned int len = gld_opcodes[i].length; */
/* OBSOLETE register unsigned int test; */
/* OBSOLETE */
/* OBSOLETE /* Get possible opcode bytes into integer *x/ */
/* OBSOLETE test = buffer[0] << 24; */
/* OBSOLETE test |= buffer[1] << 16; */
/* OBSOLETE test |= buffer[2] << 8; */
/* OBSOLETE test |= buffer[3]; */
/* OBSOLETE */
/* OBSOLETE /* Mask with opcode and see if match *x/ */
/* OBSOLETE if ((opcode & mask) == (test & mask)) */
/* OBSOLETE { */
/* OBSOLETE /* See if second or third match *x/ */
/* OBSOLETE if (index >= 0) */
/* OBSOLETE { */
/* OBSOLETE /* Take new one if it looks good *x/ */
/* OBSOLETE if (bestlen == MAXLEN && len == MAXLEN) */
/* OBSOLETE { */
/* OBSOLETE /* See if lower bits matched *x/ */
/* OBSOLETE if (((bestmask & 3) == 0) && */
/* OBSOLETE ((mask & 3) != 0)) */
/* OBSOLETE { */
/* OBSOLETE bestmask = mask; */
/* OBSOLETE bestlen = len; */
/* OBSOLETE best = test; */
/* OBSOLETE index = i; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE /* First match, save it *x/ */
/* OBSOLETE bestmask = mask; */
/* OBSOLETE bestlen = len; */
/* OBSOLETE best = test; */
/* OBSOLETE index = i; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Handle undefined instructions. *x/ */
/* OBSOLETE if (index < 0) */
/* OBSOLETE { */
/* OBSOLETE fprintf (stream, "undefined 0%o",(buffer[0]<<8)+buffer[1]); */
/* OBSOLETE return 2; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Print instruction name *x/ */
/* OBSOLETE fprintf (stream, "%-12s", gld_opcodes[index].name); */
/* OBSOLETE */
/* OBSOLETE /* Adjust if short instruction *x/ */
/* OBSOLETE if (gld_opcodes[index].length < 4) */
/* OBSOLETE { */
/* OBSOLETE best >>= 16; */
/* OBSOLETE i = 0; */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE i = 16; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Dump out instruction arguments *x/ */
/* OBSOLETE for (d = gld_opcodes[index].args; *d; ++d) */
/* OBSOLETE { */
/* OBSOLETE switch (*d) */
/* OBSOLETE { */
/* OBSOLETE case 'f': */
/* OBSOLETE fprintf (stream, "%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'r': */
/* OBSOLETE fprintf (stream, "r%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'R': */
/* OBSOLETE fprintf (stream, "r%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'b': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'B': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'v': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (7 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'V': */
/* OBSOLETE fprintf (stream, "b%d", (best >> (4 + i)) & 7); */
/* OBSOLETE break; */
/* OBSOLETE case 'X': */
/* OBSOLETE temp = (best >> 20) & 7; */
/* OBSOLETE if (temp) */
/* OBSOLETE fprintf (stream, "r%d", temp); */
/* OBSOLETE else */
/* OBSOLETE putc ('0', stream); */
/* OBSOLETE break; */
/* OBSOLETE case 'A': */
/* OBSOLETE temp = (best >> 16) & 7; */
/* OBSOLETE if (temp) */
/* OBSOLETE fprintf (stream, "(b%d)", temp); */
/* OBSOLETE break; */
/* OBSOLETE case 'S': */
/* OBSOLETE fprintf (stream, "#%d", best & 0x1f); */
/* OBSOLETE break; */
/* OBSOLETE case 'I': */
/* OBSOLETE fprintf (stream, "#%x", best & 0xffff); */
/* OBSOLETE break; */
/* OBSOLETE case 'O': */
/* OBSOLETE fprintf (stream, "%x", best & 0xffff); */
/* OBSOLETE break; */
/* OBSOLETE case 'h': */
/* OBSOLETE fprintf (stream, "%d", best & 0xfffe); */
/* OBSOLETE break; */
/* OBSOLETE case 'd': */
/* OBSOLETE fprintf (stream, "%d", best & 0xfffc); */
/* OBSOLETE break; */
/* OBSOLETE case 'T': */
/* OBSOLETE fprintf (stream, "%d", (best >> 8) & 0xff); */
/* OBSOLETE break; */
/* OBSOLETE case 'N': */
/* OBSOLETE fprintf (stream, "%d", best & 0xff); */
/* OBSOLETE break; */
/* OBSOLETE default: */
/* OBSOLETE putc (*d, stream); */
/* OBSOLETE break; */
/* OBSOLETE } */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* Return length of instruction *x/ */
/* OBSOLETE return (gld_opcodes[index].length); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * Find the number of arguments to a function. */
/* OBSOLETE *x/ */
/* OBSOLETE findarg(frame) */
/* OBSOLETE struct frame_info *frame; */
/* OBSOLETE { */
/* OBSOLETE register struct symbol *func; */
/* OBSOLETE register unsigned pc; */
/* OBSOLETE */
/* OBSOLETE #ifdef notdef */
/* OBSOLETE /* find starting address of frame function *x/ */
/* OBSOLETE pc = get_pc_function_start (frame->pc); */
/* OBSOLETE */
/* OBSOLETE /* find function symbol info *x/ */
/* OBSOLETE func = find_pc_function (pc); */
/* OBSOLETE */
/* OBSOLETE /* call blockframe code to look for match *x/ */
/* OBSOLETE if (func != NULL) */
/* OBSOLETE return (func->value.block->nsyms / sizeof(int)); */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE return (-1); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * In the case of the NPL, the frame's norminal address is Br2 and the */
/* OBSOLETE * previous routines frame is up the stack X bytes. Finding out what */
/* OBSOLETE * 'X' is can be tricky. */
/* OBSOLETE * */
/* OBSOLETE * 1.) stored in the code function header xA(Br1). */
/* OBSOLETE * 2.) must be careful of recurssion. */
/* OBSOLETE *x/ */
/* OBSOLETE CORE_ADDR */
/* OBSOLETE findframe(thisframe) */
/* OBSOLETE struct frame_info *thisframe; */
/* OBSOLETE { */
/* OBSOLETE register CORE_ADDR pointer; */
/* OBSOLETE CORE_ADDR framechain(); */
/* OBSOLETE #if 0 */
/* OBSOLETE struct frame_info *frame; */
/* OBSOLETE */
/* OBSOLETE /* Setup toplevel frame structure *x/ */
/* OBSOLETE frame->pc = read_pc(); */
/* OBSOLETE frame->next_frame = 0; */
/* OBSOLETE frame->frame = read_register (SP_REGNUM); /* Br2 *x/ */
/* OBSOLETE */
/* OBSOLETE /* Search for this frame (start at current Br2) *x/ */
/* OBSOLETE do */
/* OBSOLETE { */
/* OBSOLETE pointer = framechain(frame); */
/* OBSOLETE frame->next_frame = frame->frame; */
/* OBSOLETE frame->frame = pointer; */
/* OBSOLETE frame->pc = FRAME_SAVED_PC(frame); */
/* OBSOLETE } */
/* OBSOLETE while (frame->next_frame != thisframe); */
/* OBSOLETE #endif */
/* OBSOLETE */
/* OBSOLETE pointer = framechain (thisframe); */
/* OBSOLETE */
/* OBSOLETE /* stop gap for now, end at __base3 *x/ */
/* OBSOLETE if (thisframe->pc == 0) */
/* OBSOLETE return 0; */
/* OBSOLETE */
/* OBSOLETE return pointer; */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE /* */
/* OBSOLETE * Gdb front-end and internal framechain routine. */
/* OBSOLETE * Go back up stack one level. Tricky... */
/* OBSOLETE *x/ */
/* OBSOLETE CORE_ADDR */
/* OBSOLETE framechain(frame) */
/* OBSOLETE register struct frame_info *frame; */
/* OBSOLETE { */
/* OBSOLETE register CORE_ADDR func, prevsp; */
/* OBSOLETE register unsigned value; */
/* OBSOLETE */
/* OBSOLETE /* Get real function start address from internal frame address *x/ */
/* OBSOLETE func = get_pc_function_start(frame->pc); */
/* OBSOLETE */
/* OBSOLETE /* If no stack given, read register Br1 "(sp)" *x/ */
/* OBSOLETE if (!frame->frame) */
/* OBSOLETE prevsp = read_register (SP_REGNUM); */
/* OBSOLETE else */
/* OBSOLETE prevsp = frame->frame; */
/* OBSOLETE */
/* OBSOLETE /* Check function header, case #2 *x/ */
/* OBSOLETE value = read_memory_integer (func, 4); */
/* OBSOLETE if (value) */
/* OBSOLETE { */
/* OBSOLETE /* 32bit call push value stored in function header *x/ */
/* OBSOLETE prevsp += value; */
/* OBSOLETE } */
/* OBSOLETE else */
/* OBSOLETE { */
/* OBSOLETE /* read half-word from suabr at start of function *x/ */
/* OBSOLETE prevsp += read_memory_integer (func + 10, 2); */
/* OBSOLETE } */
/* OBSOLETE */
/* OBSOLETE return (prevsp); */
/* OBSOLETE } */
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