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