263 lines
6.2 KiB
C
263 lines
6.2 KiB
C
/* ARC target-dependent stuff. Extension structure access functions
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Copyright 1995, 1997, 2000, 2001, 2004, 2005, 2007
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Free Software Foundation, Inc.
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This file is part of libopcodes.
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This library 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 3, or (at your option)
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any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include "bfd.h"
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#include "arc-ext.h"
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#include "libiberty.h"
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/* Extension structure */
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static struct arcExtMap arc_extension_map;
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/* Get the name of an extension instruction. */
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const char *
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arcExtMap_instName(int opcode, int minor, int *flags)
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{
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if (opcode == 3)
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{
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/* FIXME: ??? need to also check 0/1/2 in bit0 for (3f) brk/sleep/swi */
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if (minor < 0x09 || minor == 0x3f)
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return 0;
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else
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opcode = 0x1f - 0x10 + minor - 0x09 + 1;
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}
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else
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if (opcode < 0x10)
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return 0;
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else
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opcode -= 0x10;
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if (!arc_extension_map.instructions[opcode])
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return 0;
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*flags = arc_extension_map.instructions[opcode]->flags;
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return arc_extension_map.instructions[opcode]->name;
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}
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/* Get the name of an extension core register. */
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const char *
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arcExtMap_coreRegName(int value)
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{
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if (value < 32)
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return 0;
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return arc_extension_map.coreRegisters[value-32];
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}
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/* Get the name of an extension condition code. */
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const char *
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arcExtMap_condCodeName(int value)
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{
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if (value < 16)
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return 0;
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return arc_extension_map.condCodes[value-16];
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}
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/* Get the name of an extension aux register. */
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const char *
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arcExtMap_auxRegName(long address)
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{
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/* walk the list of aux reg names and find the name */
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struct ExtAuxRegister *r;
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for (r = arc_extension_map.auxRegisters; r; r = r->next) {
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if (r->address == address)
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return (const char *) r->name;
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}
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return 0;
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}
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/* Recursively free auxilliary register strcture pointers until
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the list is empty. */
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static void
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clean_aux_registers(struct ExtAuxRegister *r)
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{
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if (r -> next)
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{
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clean_aux_registers( r->next);
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free(r -> name);
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free(r -> next);
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r ->next = NULL;
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}
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else
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free(r -> name);
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}
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/* Free memory that has been allocated for the extensions. */
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static void
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cleanup_ext_map(void)
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{
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struct ExtAuxRegister *r;
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struct ExtInstruction *insn;
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int i;
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/* clean aux reg structure */
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r = arc_extension_map.auxRegisters;
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if (r)
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{
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(clean_aux_registers(r));
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free(r);
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}
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/* clean instructions */
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for (i = 0; i < NUM_EXT_INST; i++)
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{
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insn = arc_extension_map.instructions[i];
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if (insn)
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free(insn->name);
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}
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/* clean core reg struct */
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for (i = 0; i < NUM_EXT_CORE; i++)
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{
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if (arc_extension_map.coreRegisters[i])
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free(arc_extension_map.coreRegisters[i]);
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}
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for (i = 0; i < NUM_EXT_COND; i++) {
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if (arc_extension_map.condCodes[i])
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free(arc_extension_map.condCodes[i]);
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}
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memset(&arc_extension_map, 0, sizeof(struct arcExtMap));
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}
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int
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arcExtMap_add(void *base, unsigned long length)
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{
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unsigned char *block = base;
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unsigned char *p = block;
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/* Clean up and reset everything if needed. */
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cleanup_ext_map();
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while (p && p < (block + length))
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{
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/* p[0] == length of record
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p[1] == type of record
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For instructions:
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p[2] = opcode
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p[3] = minor opcode (if opcode == 3)
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p[4] = flags
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p[5]+ = name
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For core regs and condition codes:
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p[2] = value
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p[3]+ = name
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For aux regs:
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p[2..5] = value
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p[6]+ = name
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(value is p[2]<<24|p[3]<<16|p[4]<<8|p[5]) */
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if (p[0] == 0)
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return -1;
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switch (p[1])
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{
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case EXT_INSTRUCTION:
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{
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char opcode = p[2];
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char minor = p[3];
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char * insn_name = (char *) xmalloc(( (int)*p-5) * sizeof(char));
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struct ExtInstruction * insn =
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(struct ExtInstruction *) xmalloc(sizeof(struct ExtInstruction));
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if (opcode==3)
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opcode = 0x1f - 0x10 + minor - 0x09 + 1;
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else
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opcode -= 0x10;
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insn -> flags = (char) *(p+4);
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strcpy (insn_name, (char *) (p+5));
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insn -> name = insn_name;
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arc_extension_map.instructions[(int) opcode] = insn;
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}
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break;
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case EXT_CORE_REGISTER:
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{
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char * core_name = (char *) xmalloc(((int)*p-3) * sizeof(char));
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strcpy(core_name, (char *) (p+3));
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arc_extension_map.coreRegisters[p[2]-32] = core_name;
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}
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break;
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case EXT_COND_CODE:
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{
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char * cc_name = (char *) xmalloc( ((int)*p-3) * sizeof(char));
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strcpy(cc_name, (char *) (p+3));
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arc_extension_map.condCodes[p[2]-16] = cc_name;
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}
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break;
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case EXT_AUX_REGISTER:
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{
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/* trickier -- need to store linked list to these */
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struct ExtAuxRegister *newAuxRegister =
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(struct ExtAuxRegister *)malloc(sizeof(struct ExtAuxRegister));
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char * aux_name = (char *) xmalloc ( ((int)*p-6) * sizeof(char));
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strcpy (aux_name, (char *) (p+6));
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newAuxRegister->name = aux_name;
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newAuxRegister->address = p[2]<<24 | p[3]<<16 | p[4]<<8 | p[5];
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newAuxRegister->next = arc_extension_map.auxRegisters;
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arc_extension_map.auxRegisters = newAuxRegister;
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}
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break;
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default:
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return -1;
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}
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p += p[0]; /* move to next record */
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}
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return 0;
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}
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/* Load hw extension descibed in .extArcMap ELF section. */
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void
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build_ARC_extmap (text_bfd)
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bfd *text_bfd;
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{
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char *arcExtMap;
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bfd_size_type count;
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asection *p;
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for (p = text_bfd->sections; p != NULL; p = p->next)
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if (!strcmp (p->name, ".arcextmap"))
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{
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count = bfd_get_section_size (p);
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arcExtMap = (char *) xmalloc (count);
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if (bfd_get_section_contents (text_bfd, p, (PTR) arcExtMap, 0, count))
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{
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arcExtMap_add ((PTR) arcExtMap, count);
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break;
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}
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free ((PTR) arcExtMap);
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}
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}
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