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https://github.com/darlinghq/darling-gdb.git
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199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
235 lines
5.8 KiB
C
235 lines
5.8 KiB
C
/* Print instructions for Tahoe target machines, for GDB.
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Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
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Contributed by the State University of New York at Buffalo, by the
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Distributed Computer Systems Lab, Department of Computer Science, 1991.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "opcode/tahoe.h"
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/* Tahoe instructions are never longer than this. */
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#define MAXLEN 62
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/* Number of elements in the opcode table. */
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#define NOPCODES (sizeof votstrs / sizeof votstrs[0])
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static unsigned char *print_insn_arg ();
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/* Print the Tahoe instruction at address MEMADDR in debugged memory,
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on STREAM. Returns length of the instruction, in bytes. */
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int
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print_insn (memaddr, stream)
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CORE_ADDR memaddr;
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GDB_FILE *stream;
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{
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unsigned char buffer[MAXLEN];
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register int i;
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register unsigned char *p;
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register char *d;
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read_memory (memaddr, buffer, MAXLEN);
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for (i = 0; i < NOPCODES; i++)
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if (votstrs[i].detail.code == buffer[0]
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|| votstrs[i].detail.code == *(unsigned short *)buffer)
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break;
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/* Handle undefined instructions. */
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if (i == NOPCODES)
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{
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fprintf_unfiltered (stream, "0%o", buffer[0]);
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return 1;
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}
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fprintf_unfiltered (stream, "%s", votstrs[i].name);
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/* Point at first byte of argument data,
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and at descriptor for first argument. */
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p = buffer + 1 + (votstrs[i].detail.code >= 0x100);
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d = votstrs[i].detail.args;
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if (*d)
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fputc_unfiltered ('\t', stream);
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while (*d)
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{
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p = print_insn_arg (d, p, memaddr + (p - buffer), stream);
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d += 2;
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if (*d)
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fprintf_unfiltered (stream, ",");
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}
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return p - buffer;
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}
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/*******************************************************************/
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static unsigned char *
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print_insn_arg (d, p, addr, stream)
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char *d;
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register char *p;
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CORE_ADDR addr;
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GDB_FILE *stream;
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{
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int temp1 = 0;
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register int regnum = *p & 0xf;
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float floatlitbuf;
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if (*d == 'b')
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{
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if (d[1] == 'b')
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fprintf_unfiltered (stream, "0x%x", addr + *p++ + 1);
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else
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{
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temp1 = *p;
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temp1 <<= 8;
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temp1 |= *(p + 1);
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fprintf_unfiltered (stream, "0x%x", addr + temp1 + 2);
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p += 2;
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}
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}
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else
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switch ((*p++ >> 4) & 0xf)
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{
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case 0:
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case 1:
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case 2:
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case 3: /* Literal (short immediate byte) mode */
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if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
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{
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*(int *)&floatlitbuf = 0x4000 + ((p[-1] & 0x3f) << 4);
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fprintf_unfiltered (stream, "$%f", floatlitbuf);
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}
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else
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fprintf_unfiltered (stream, "$%d", p[-1] & 0x3f);
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break;
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case 4: /* Indexed */
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p = (char *) print_insn_arg (d, p, addr + 1, stream);
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fprintf_unfiltered (stream, "[%s]", reg_names[regnum]);
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break;
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case 5: /* Register */
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fprintf_unfiltered (stream, reg_names[regnum]);
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break;
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case 7: /* Autodecrement */
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fputc_unfiltered ('-', stream);
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case 6: /* Register deferred */
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fprintf_unfiltered (stream, "(%s)", reg_names[regnum]);
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break;
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case 9: /* Absolute Address & Autoincrement deferred */
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fputc_unfiltered ('*', stream);
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if (regnum == PC_REGNUM)
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{
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temp1 = *p;
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temp1 <<= 8;
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temp1 |= *(p +1);
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fputc_unfiltered ('$', stream);
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print_address (temp1, stream);
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p += 4;
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break;
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}
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case 8: /*Immediate & Autoincrement SP */
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if (regnum == 8) /*88 is Immediate Byte Mode*/
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fprintf_unfiltered (stream, "$%d", *p++);
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else if (regnum == 9) /*89 is Immediate Word Mode*/
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{
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temp1 = *p;
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temp1 <<= 8;
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temp1 |= *(p +1);
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fprintf_unfiltered (stream, "$%d", temp1);
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p += 2;
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}
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else if (regnum == PC_REGNUM) /*8F is Immediate Long Mode*/
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{
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temp1 = *p;
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temp1 <<=8;
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temp1 |= *(p +1);
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temp1 <<=8;
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temp1 |= *(p +2);
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temp1 <<= 8;
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temp1 |= *(p +3);
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fprintf_unfiltered (stream, "$%d", temp1);
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p += 4;
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}
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else /*8E is Autoincrement SP Mode*/
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fprintf_unfiltered (stream, "(%s)+", reg_names[regnum]);
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break;
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case 11: /* Register + Byte Displacement Deferred Mode*/
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fputc_unfiltered ('*', stream);
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case 10: /* Register + Byte Displacement Mode*/
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if (regnum == PC_REGNUM)
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print_address (addr + *p + 2, stream);
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else
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fprintf_unfiltered (stream, "%d(%s)", *p, reg_names[regnum]);
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p += 1;
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break;
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case 13: /* Register + Word Displacement Deferred Mode*/
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fputc_unfiltered ('*', stream);
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case 12: /* Register + Word Displacement Mode*/
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temp1 = *p;
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temp1 <<= 8;
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temp1 |= *(p +1);
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if (regnum == PC_REGNUM)
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print_address (addr + temp1 + 3, stream);
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else
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fprintf_unfiltered (stream, "%d(%s)", temp1, reg_names[regnum]);
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p += 2;
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break;
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case 15: /* Register + Long Displacement Deferred Mode*/
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fputc_unfiltered ('*', stream);
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case 14: /* Register + Long Displacement Mode*/
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temp1 = *p;
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temp1 <<= 8;
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temp1 |= *(p +1);
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temp1 <<= 8;
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temp1 |= *(p +2);
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temp1 <<= 8;
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temp1 |= *(p +3);
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if (regnum == PC_REGNUM)
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print_address (addr + temp1 + 5, stream);
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else
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fprintf_unfiltered (stream, "%d(%s)", temp1, reg_names[regnum]);
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p += 4;
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}
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return (unsigned char *) p;
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}
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