1069 lines
26 KiB
C
1069 lines
26 KiB
C
/* C-SKY disassembler.
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Copyright (C) 1988-2018 Free Software Foundation, Inc.
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Contributed by C-SKY Microsystems and Mentor Graphics.
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This file is part of the GNU opcodes library.
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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 "config.h"
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#include <stdio.h>
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#include "bfd_stdint.h"
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#include "disassemble.h"
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#include "elf-bfd.h"
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#include "opcode/csky.h"
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#include "libiberty.h"
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#include "csky-opc.h"
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#include "floatformat.h"
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#define CSKY_INST_TYPE unsigned long
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#define HAS_SUB_OPERAND (unsigned int)0xffffffff
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enum sym_type
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{
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CUR_TEXT,
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CUR_DATA
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};
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struct csky_dis_info
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{
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/* Mem to disassemble. */
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bfd_vma mem;
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/* Disassemble info. */
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disassemble_info *info;
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/* Opcode information. */
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struct csky_opcode_info const *opinfo;
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/* The value of operand to show. */
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int value;
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/* Whether to look up/print a symbol name. */
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int need_output_symbol;
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} dis_info;
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enum sym_type last_type;
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int last_map_sym = 1;
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bfd_vma last_map_addr = 0;
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/* Only for objdump tool. */
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#define INIT_MACH_FLAG 0xffffffff
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#define BINARY_MACH_FLAG 0x0
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static unsigned int mach_flag = INIT_MACH_FLAG;
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static void
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print_insn_data (bfd_vma pc ATTRIBUTE_UNUSED,
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struct disassemble_info *info,
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long given)
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{
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switch (info->bytes_per_chunk)
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{
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case 1:
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info->fprintf_func (info->stream, ".byte\t0x%02lx", given);
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break;
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case 2:
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info->fprintf_func (info->stream, ".short\t0x%04lx", given);
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break;
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case 4:
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info->fprintf_func (info->stream, ".long\t0x%08lx", given);
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break;
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default:
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abort ();
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}
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}
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static int
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get_sym_code_type (struct disassemble_info *info,
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int n,
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enum sym_type *sym_type)
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{
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const char *name;
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name = bfd_asymbol_name (info->symtab[n]);
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if (name[0] == '$' && (name[1] == 't' || name[1] == 'd')
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&& (name[2] == 0 || name[2] == '.'))
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{
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*sym_type = ((name[1] == 't') ? CUR_TEXT : CUR_DATA);
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return TRUE;
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}
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return FALSE;
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}
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static int
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csky_get_operand_mask (struct operand const *oprnd)
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{
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int mask = 0;
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if (oprnd->mask == HAS_SUB_OPERAND)
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{
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struct soperand *sop = (struct soperand *)oprnd;
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mask |= csky_get_operand_mask (&sop->subs[0]);
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mask |= csky_get_operand_mask (&sop->subs[1]);
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return mask;
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}
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return oprnd->mask;
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}
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static int
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csky_get_mask (struct csky_opcode_info const *pinfo)
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{
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int i = 0;
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int mask = 0;
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/* List type. */
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if (pinfo->operand_num == -1)
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mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]);
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else
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for (; i < pinfo->operand_num; i++)
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mask |= csky_get_operand_mask (&pinfo->oprnd.oprnds[i]);
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mask = ~mask;
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return mask;
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}
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static unsigned int
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csky_chars_to_number (unsigned char * buf, int n)
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{
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if (n == 0)
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abort ();
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int i;
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int val = 0;
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if (dis_info.info->endian == BFD_ENDIAN_BIG)
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while (n--)
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val |= buf[n] << (n*8);
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else
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for (i = 0; i < n; i++)
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val |= buf[i] << (i*8);
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return val;
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}
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static struct csky_opcode const *g_opcodeP;
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static struct csky_opcode const *
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csky_find_inst_info (struct csky_opcode_info const **pinfo,
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CSKY_INST_TYPE inst, int length)
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{
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int i;
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unsigned int mask;
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struct csky_opcode const *p;
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p = g_opcodeP;
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while (p->mnemonic)
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{
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/* Get the opcode mask. */
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for (i = 0; i < OP_TABLE_NUM; i++)
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if (length == 2)
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{
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mask = csky_get_mask (&p->op16[i]);
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if (mask != 0 && (inst & mask) == p->op16[i].opcode)
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{
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*pinfo = &p->op16[i];
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g_opcodeP = p;
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return p;
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}
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}
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else if (length == 4)
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{
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mask = csky_get_mask (&p->op32[i]);
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if (mask != 0
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&& ((unsigned long)(inst & mask)
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== (unsigned long)p->op32[i].opcode))
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{
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*pinfo = &p->op32[i];
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g_opcodeP = p;
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return p;
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}
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}
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p++;
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}
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return NULL;
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}
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static bfd_boolean
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is_extern_symbol (struct disassemble_info *info, int addr)
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{
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unsigned int rel_count = 0;
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if (info->section == NULL)
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return 0;
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if ((info->section->flags & SEC_RELOC) != 0) /* Fit .o file. */
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{
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struct reloc_cache_entry *pt = info->section->relocation;
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for (; rel_count < info->section->reloc_count; rel_count++, pt++)
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if ((long unsigned int)addr == pt->address)
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return TRUE;
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return FALSE;
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}
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return FALSE;
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}
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/* Suppress printing of mapping symbols emitted by the assembler to mark
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the beginning of code and data sequences. */
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bfd_boolean
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csky_symbol_is_valid (asymbol *sym,
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struct disassemble_info *info ATTRIBUTE_UNUSED)
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{
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const char *name;
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if (sym == NULL)
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return FALSE;
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name = bfd_asymbol_name (sym);
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return name && *name != '$';
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}
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disassembler_ftype
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csky_get_disassembler (bfd *abfd)
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{
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if (abfd != NULL)
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mach_flag = elf_elfheader (abfd)->e_flags;
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return print_insn_csky;
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}
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static int
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csky_output_operand (char *str, struct operand const *oprnd,
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CSKY_INST_TYPE inst, int reloc ATTRIBUTE_UNUSED)
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{
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int ret = 0;;
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int bit = 0;
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int result = 0;
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bfd_vma value;
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int mask = oprnd->mask;
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int max = 0;
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char buf[128];
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/* Get operand value with mask. */
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value = inst & mask;
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for (; mask; mask >>= 1, value >>=1)
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if (mask & 0x1)
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{
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result |= ((value & 0x1) << bit);
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max |= (1 << bit);
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bit++;
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}
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value = result;
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/* Here is general instructions that have no reloc. */
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switch (oprnd->type)
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{
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case OPRND_TYPE_CTRLREG:
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if (IS_CSKY_V1 (mach_flag))
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{
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/* In V1 only cr0-cr12 have alias names. */
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if (value <= 12)
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strcat (str, csky_ctrl_regs[value].name);
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/* Others using crn(n > 12). */
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else if (value <= 30)
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{
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sprintf (buf, "cr%d", (int)value);
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strcat (str, buf);
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}
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else
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return -1;
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}
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else
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{
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int sel;
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int crx;
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sel = value >> 5;
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crx = value & 0x1f;
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sprintf (buf, "cr<%d, %d>", crx, sel);
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strcat (str, buf);
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}
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break;
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case OPRND_TYPE_DUMMY_REG:
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mask = dis_info.opinfo->oprnd.oprnds[0].mask;
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value = inst & mask;
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for (; mask; mask >>= 1, value >>=1)
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if (mask & 0x1)
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{
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result |= ((value & 0x1) << bit);
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bit++;
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}
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value = result;
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strcat (str, csky_general_reg[value]);
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break;
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case OPRND_TYPE_GREG0_7:
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case OPRND_TYPE_GREG0_15:
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case OPRND_TYPE_GREG16_31:
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case OPRND_TYPE_REGnsplr:
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case OPRND_TYPE_AREG:
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if (IS_CSKY_V2 (mach_flag) && value == 14)
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strcat (str, "sp");
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else
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strcat (str, csky_general_reg[value]);
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dis_info.value = value;
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break;
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case OPRND_TYPE_CPREG:
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strcat (str, csky_cp_reg[value]);
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break;
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case OPRND_TYPE_FREG:
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sprintf (buf, "fr%d", (int)value);
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strcat (str, buf);
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break;
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case OPRND_TYPE_VREG:
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sprintf (buf, "vr%d", (int)value);
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strcat (str, buf);
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break;
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case OPRND_TYPE_CPCREG:
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strcat (str, csky_cp_creg[value]);
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break;
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case OPRND_TYPE_CPIDX:
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strcat (str, csky_cp_idx[value]);
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break;
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case OPRND_TYPE_IMM2b_JMPIX:
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value = (value + 2) << 3;
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sprintf (buf, "%d", (int)value);
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strcat (str, buf);
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break;
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case OPRND_TYPE_IMM_LDST:
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case OPRND_TYPE_IMM_FLDST:
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value <<= oprnd->shift;
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sprintf (buf, "0x%x", (unsigned int)value);
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strcat (str, buf);
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break;
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case OPRND_TYPE_IMM7b_LS2:
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case OPRND_TYPE_IMM8b_LS2:
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sprintf (buf, "%d", (int)(value << 2));
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strcat (str, buf);
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ret = 0;
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break;
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case OPRND_TYPE_IMM5b_BMASKI:
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if ((value != 0) && (value > 31 || value < 8))
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{
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ret = -1;
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break;
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}
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sprintf (buf, "%d", (int)value);
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strcat (str, buf);
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ret = 0;
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break;
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case OPRND_TYPE_IMM5b_1_31:
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if (value > 31 || value < 1)
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{
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ret = -1;
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break;
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}
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sprintf (buf, "%d", (int)value);
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strcat (str, buf);
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ret = 0;
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break;
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case OPRND_TYPE_IMM5b_7_31:
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if (value > 31 || value < 7)
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{
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ret = -1;
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break;
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}
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sprintf (buf, "%d", (int)value);
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strcat (str, buf);
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ret = 0;
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break;
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case OPRND_TYPE_MSB2SIZE:
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case OPRND_TYPE_LSB2SIZE:
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{
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static int size;
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if (oprnd->type == OPRND_TYPE_MSB2SIZE)
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size = value;
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else
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{
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str[strlen (str) - 2] = '\0';
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sprintf (buf, "%d, %d", (int)(size + value), (int)value);
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strcat (str, buf);
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}
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break;
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}
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case OPRND_TYPE_IMM1b:
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case OPRND_TYPE_IMM2b:
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case OPRND_TYPE_IMM4b:
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case OPRND_TYPE_IMM5b:
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case OPRND_TYPE_IMM7b:
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case OPRND_TYPE_IMM8b:
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case OPRND_TYPE_IMM12b:
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case OPRND_TYPE_IMM15b:
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case OPRND_TYPE_IMM16b:
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case OPRND_TYPE_IMM16b_MOVIH:
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case OPRND_TYPE_IMM16b_ORI:
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sprintf (buf, "%d", (int)value);
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strcat (str, buf);
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ret = 0;
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break;
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case OPRND_TYPE_OFF8b:
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case OPRND_TYPE_OFF16b:
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{
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unsigned char ibytes[4];
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int shift = oprnd->shift;
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int status;
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unsigned int mem_val;
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dis_info.info->stop_vma = 0;
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value = ((dis_info.mem + (value << shift)
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+ ((IS_CSKY_V1 (mach_flag)) ? 2 : 0))
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& 0xfffffffc);
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status = dis_info.info->read_memory_func (value, ibytes, 4,
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dis_info.info);
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if (status != 0)
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{
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dis_info.info->memory_error_func (status, dis_info.mem,
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dis_info.info);
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return -1;
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}
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mem_val = csky_chars_to_number (ibytes, 4);
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/* Remove [] around literal value to match ABI syntax. */
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sprintf (buf, "0x%X", mem_val);
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strcat (str, buf);
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/* For jmpi/jsri, we'll try to get a symbol for the target. */
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if (dis_info.info->print_address_func && mem_val != 0)
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{
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dis_info.value = mem_val;
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dis_info.need_output_symbol = 1;
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}
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else
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{
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sprintf (buf, "\t// from address pool at 0x%x",
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(unsigned int)value);
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strcat (str, buf);
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}
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break;
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}
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case OPRND_TYPE_BLOOP_OFF4b:
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case OPRND_TYPE_BLOOP_OFF12b:
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case OPRND_TYPE_OFF11b:
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case OPRND_TYPE_OFF16b_LSL1:
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case OPRND_TYPE_IMM_OFF18b:
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case OPRND_TYPE_OFF26b:
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{
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int shift = oprnd->shift;
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if (value & ((max >> 1) + 1))
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value |= ~max;
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if (is_extern_symbol (dis_info.info, dis_info.mem))
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value = 0;
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else if (IS_CSKY_V1 (mach_flag))
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value = dis_info.mem + 2 + (value << shift);
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else
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value = dis_info.mem + (value << shift);
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dis_info.need_output_symbol = 1;
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dis_info.value= value;
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sprintf (buf, "0x%x", (unsigned int)value);
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strcat (str, buf);
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break;
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}
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case OPRND_TYPE_CONSTANT:
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case OPRND_TYPE_FCONSTANT:
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{
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int shift = oprnd->shift;
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char ibytes[8];
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int status;
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bfd_vma addr;
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int nbytes;
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dis_info.info->stop_vma = 0;
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value <<= shift;
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if (IS_CSKY_V1 (mach_flag))
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addr = (dis_info.mem + 2 + value) & 0xfffffffc;
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else
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addr = (dis_info.mem + value) & 0xfffffffc;
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if (oprnd->type == OPRND_TYPE_FCONSTANT
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&& dis_info.opinfo->opcode != CSKYV2_INST_FLRW)
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nbytes = 8;
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else
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nbytes = 4;
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|
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status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes,
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nbytes, dis_info.info);
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if (status != 0)
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/* Address out of bounds. -> lrw rx, [pc, 0ffset]. */
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sprintf (buf, "[pc, %d]\t// from address pool at %x", (int)value,
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(unsigned int)addr);
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else
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{
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dis_info.value = addr;
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value = csky_chars_to_number ((unsigned char *)ibytes, 4);
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}
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if (oprnd->type == OPRND_TYPE_FCONSTANT)
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{
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double f;
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if (dis_info.opinfo->opcode == CSKYV2_INST_FLRW)
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|
/* flrws. */
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|
floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG
|
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? &floatformat_ieee_single_big
|
|
: &floatformat_ieee_single_little),
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ibytes, &f);
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|
else
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|
floatformat_to_double ((dis_info.info->endian == BFD_ENDIAN_BIG
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? &floatformat_ieee_double_big
|
|
: &floatformat_ieee_double_little),
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ibytes, &f);
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|
sprintf (buf, "%f", f);
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|
}
|
|
else
|
|
{
|
|
dis_info.need_output_symbol = 1;
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sprintf (buf, "0x%x", (unsigned int)value);
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|
}
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|
|
strcat (str, buf);
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break;
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|
}
|
|
case OPRND_TYPE_ELRW_CONSTANT:
|
|
{
|
|
int shift = oprnd->shift;
|
|
char ibytes[4];
|
|
int status;
|
|
bfd_vma addr;
|
|
dis_info.info->stop_vma = 0;
|
|
|
|
value = 0x80 + ((~value) & 0x7f);
|
|
|
|
value = value << shift;
|
|
addr = (dis_info.mem + value) & 0xfffffffc;
|
|
|
|
status = dis_info.info->read_memory_func (addr, (bfd_byte *)ibytes,
|
|
4, dis_info.info);
|
|
if (status != 0)
|
|
/* Address out of bounds. -> lrw rx, [pc, 0ffset]. */
|
|
sprintf (buf, "[pc, %d]\t// from address pool at %x", (int) value,
|
|
(unsigned int)addr);
|
|
else
|
|
{
|
|
dis_info.value = addr;
|
|
value = csky_chars_to_number ((unsigned char *)ibytes, 4);
|
|
dis_info.need_output_symbol = 1;
|
|
sprintf (buf, "0x%x", (unsigned int)value);
|
|
}
|
|
|
|
strcat (str, buf);
|
|
break;
|
|
}
|
|
case OPRND_TYPE_SFLOAT:
|
|
case OPRND_TYPE_DFLOAT:
|
|
{
|
|
/* This is for fmovis/fmovid, which have an internal 13-bit
|
|
encoding that they convert to single/double precision
|
|
(respectively). We'll convert the 13-bit encoding to an IEEE
|
|
double and then to host double format to print it.
|
|
Sign bit: bit 20.
|
|
4-bit exponent: bits 19:16, biased by 11.
|
|
8-bit mantissa: split between 24:21 and 7:4. */
|
|
uint64_t imm4;
|
|
uint64_t imm8;
|
|
uint64_t dbnum;
|
|
unsigned char valbytes[8];
|
|
double fvalue;
|
|
|
|
imm4 = ((inst >> 16) & 0xf);
|
|
imm4 = (uint64_t)(1023 - (imm4 - 11)) << 52;
|
|
|
|
imm8 = (uint64_t)((inst >> 4) & 0xf) << 44;
|
|
imm8 |= (uint64_t)((inst >> 21) & 0xf) << 48;
|
|
|
|
dbnum = (uint64_t)((inst >> 20) & 1) << 63;
|
|
dbnum |= imm4 | imm8;
|
|
|
|
/* Do this a byte at a time so we don't have to
|
|
worry about the host's endianness. */
|
|
valbytes[0] = dbnum & 0xff;
|
|
valbytes[1] = (dbnum >> 8) & 0xff;
|
|
valbytes[2] = (dbnum >> 16) & 0xff;
|
|
valbytes[3] = (dbnum >> 24) & 0xff;
|
|
valbytes[4] = (dbnum >> 32) & 0xff;
|
|
valbytes[5] = (dbnum >> 40) & 0xff;
|
|
valbytes[6] = (dbnum >> 48) & 0xff;
|
|
valbytes[7] = (dbnum >> 56) & 0xff;
|
|
|
|
floatformat_to_double (&floatformat_ieee_double_little, valbytes,
|
|
&fvalue);
|
|
|
|
sprintf (buf, "%f", fvalue);
|
|
strcat (str, buf);
|
|
break;
|
|
}
|
|
case OPRND_TYPE_LABEL_WITH_BRACKET:
|
|
sprintf (buf, "[0x%x]", (unsigned int)value);
|
|
strcat (str, buf);
|
|
strcat (str, "\t// the offset is based on .data");
|
|
break;
|
|
case OPRND_TYPE_OIMM3b:
|
|
case OPRND_TYPE_OIMM4b:
|
|
case OPRND_TYPE_OIMM5b:
|
|
case OPRND_TYPE_OIMM5b_IDLY:
|
|
case OPRND_TYPE_OIMM8b:
|
|
case OPRND_TYPE_OIMM12b:
|
|
case OPRND_TYPE_OIMM16b:
|
|
case OPRND_TYPE_OIMM18b:
|
|
value += 1;
|
|
sprintf (buf, "%d", (int)value);
|
|
strcat (str, buf);
|
|
break;
|
|
case OPRND_TYPE_OIMM5b_BMASKI:
|
|
if (value > 32 || value < 16)
|
|
{
|
|
ret = -1;
|
|
break;
|
|
}
|
|
sprintf (buf, "%d", (int)(value + 1));
|
|
strcat (str, buf);
|
|
ret = 0;
|
|
break;
|
|
case OPRND_TYPE_FREGLIST_DASH:
|
|
if (IS_CSKY_V2 (mach_flag))
|
|
{
|
|
int vrx = value & 0xf;
|
|
int vry = vrx + (value >> 4);
|
|
sprintf (buf, "fr%d-fr%d", vrx, vry);
|
|
strcat (str, buf);
|
|
}
|
|
break;
|
|
case OPRND_TYPE_REGLIST_DASH:
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
{
|
|
strcat (str, csky_general_reg[value]);
|
|
strcat (str, "-r15");
|
|
}
|
|
else
|
|
{
|
|
strcat (str, csky_general_reg[value >> 5]);
|
|
strcat (str, "-");
|
|
strcat (str, csky_general_reg[(value & 0x1f) + (value >> 5)]);
|
|
}
|
|
break;
|
|
case OPRND_TYPE_PSR_BITS_LIST:
|
|
{
|
|
struct psrbit const *bits;
|
|
int first_oprnd = TRUE;
|
|
int i = 0;
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
{
|
|
if (value == 0)
|
|
{
|
|
strcat (str, "af");
|
|
break;
|
|
}
|
|
bits = cskyv1_psr_bits;
|
|
}
|
|
else
|
|
bits = cskyv2_psr_bits;
|
|
while (value != 0 && bits[i].name != NULL)
|
|
{
|
|
if (value & bits[i].value)
|
|
{
|
|
if (!first_oprnd)
|
|
strcat (str, ", ");
|
|
strcat (str, bits[i].name);
|
|
value &= ~bits[i].value;
|
|
first_oprnd = FALSE;
|
|
}
|
|
i++;
|
|
}
|
|
break;
|
|
}
|
|
case OPRND_TYPE_REGbsp:
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
strcat (str, "(sp)");
|
|
else
|
|
strcat (str, "(sp)");
|
|
break;
|
|
case OPRND_TYPE_REGsp:
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
strcat (str, "sp");
|
|
else
|
|
strcat (str, "sp");
|
|
break;
|
|
case OPRND_TYPE_REGnr4_r7:
|
|
case OPRND_TYPE_AREG_WITH_BRACKET:
|
|
if (IS_CSKY_V1 (mach_flag) && (value < 4 || value > 7))
|
|
{
|
|
strcat (str, "(");
|
|
strcat (str, csky_general_reg[value]);
|
|
strcat (str, ")");
|
|
}
|
|
else
|
|
{
|
|
strcat (str, "(");
|
|
strcat (str, csky_general_reg[value]);
|
|
strcat (str, ")");
|
|
}
|
|
break;
|
|
case OPRND_TYPE_AREG_WITH_LSHIFT:
|
|
strcat (str, csky_general_reg[value >> 5]);
|
|
strcat (str, " << ");
|
|
if ((value & 0x1f) == 0x1)
|
|
strcat (str, "0");
|
|
else if ((value & 0x1f) == 0x2)
|
|
strcat (str, "1");
|
|
else if ((value & 0x1f) == 0x4)
|
|
strcat (str, "2");
|
|
else if ((value & 0x1f) == 0x8)
|
|
strcat (str, "3");
|
|
break;
|
|
case OPRND_TYPE_AREG_WITH_LSHIFT_FPU:
|
|
strcat (str, csky_general_reg[value >> 2]);
|
|
strcat (str, " << ");
|
|
if ((value & 0x3) == 0x0)
|
|
strcat (str, "0");
|
|
else if ((value & 0x3) == 0x1)
|
|
strcat (str, "1");
|
|
else if ((value & 0x3) == 0x2)
|
|
strcat (str, "2");
|
|
else if ((value & 0x3) == 0x3)
|
|
strcat (str, "3");
|
|
break;
|
|
case OPRND_TYPE_FREG_WITH_INDEX:
|
|
{
|
|
unsigned freg_val = value & 0xf;
|
|
unsigned index_val = (value >> 4) & 0xf;
|
|
sprintf (buf, "vr%d[%d]", freg_val, index_val);
|
|
strcat(str, buf);
|
|
break;
|
|
}
|
|
case OPRND_TYPE_REGr4_r7:
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
strcat (str, "r4-r7");
|
|
break;
|
|
case OPRND_TYPE_CONST1:
|
|
strcat (str, "1");
|
|
break;
|
|
case OPRND_TYPE_REG_r1a:
|
|
case OPRND_TYPE_REG_r1b:
|
|
strcat (str, "r1");
|
|
break;
|
|
case OPRND_TYPE_REG_r28:
|
|
strcat (str, "r28");
|
|
break;
|
|
case OPRND_TYPE_REGLIST_DASH_COMMA:
|
|
/* 16-bit reglist. */
|
|
if (value & 0xf)
|
|
{
|
|
strcat (str, "r4");
|
|
if ((value & 0xf) > 1)
|
|
{
|
|
strcat (str, "-");
|
|
strcat (str, csky_general_reg[(value & 0xf) + 3]);
|
|
}
|
|
if (value & ~0xf)
|
|
strcat (str, ", ");
|
|
}
|
|
if (value & 0x10)
|
|
{
|
|
/* r15. */
|
|
strcat (str, "r15");
|
|
if (value & ~0x1f)
|
|
strcat (str, ", ");
|
|
}
|
|
if (dis_info.opinfo->oprnd.oprnds[0].mask != OPRND_MASK_0_4)
|
|
{
|
|
/* 32bits reglist. */
|
|
value >>= 5;
|
|
if (value & 0x3)
|
|
{
|
|
strcat (str, "r16");
|
|
if ((value & 0x7) > 1)
|
|
{
|
|
strcat (str, "-");
|
|
strcat (str, csky_general_reg[(value & 0xf) + 15]);
|
|
}
|
|
if (value & ~0x7)
|
|
strcat (str, ", ");
|
|
}
|
|
if (value & 0x8)
|
|
/* r15. */
|
|
strcat (str, "r28");
|
|
}
|
|
break;
|
|
case OPRND_TYPE_UNCOND10b:
|
|
case OPRND_TYPE_UNCOND16b:
|
|
case OPRND_TYPE_COND10b:
|
|
case OPRND_TYPE_COND16b:
|
|
{
|
|
int shift = oprnd->shift;
|
|
|
|
if (value & ((max >> 1) + 1))
|
|
value |= ~max;
|
|
if (is_extern_symbol (dis_info.info, dis_info.mem))
|
|
value = 0;
|
|
else
|
|
value = dis_info.mem + (value << shift);
|
|
sprintf (buf, "0x%x", (unsigned int)value);
|
|
strcat (str, buf);
|
|
dis_info.need_output_symbol = 1;
|
|
dis_info.value = value;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ret = -1;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
csky_print_operand (char *str, struct operand const *oprnd,
|
|
CSKY_INST_TYPE inst, int reloc)
|
|
{
|
|
int ret = -1;
|
|
char *lc = "";
|
|
char *rc = "";
|
|
if (oprnd->mask == HAS_SUB_OPERAND)
|
|
{
|
|
struct soperand *sop = (struct soperand *)oprnd;
|
|
if (oprnd->type == OPRND_TYPE_BRACKET)
|
|
{
|
|
lc = "(";
|
|
rc = ")";
|
|
}
|
|
else if (oprnd->type == OPRND_TYPE_ABRACKET)
|
|
{
|
|
lc = "<";
|
|
rc = ">";
|
|
}
|
|
strcat (str, lc);
|
|
ret = csky_print_operand (str, &sop->subs[0], inst, reloc);
|
|
if (ret)
|
|
return ret;
|
|
strcat (str, ", ");
|
|
ret = csky_print_operand (str, &sop->subs[1], inst, reloc);
|
|
strcat (str, rc);
|
|
return ret;
|
|
}
|
|
return csky_output_operand (str, oprnd, inst, reloc);
|
|
}
|
|
|
|
static int
|
|
csky_print_operands (char *str, struct csky_opcode_info const *pinfo,
|
|
struct disassemble_info *info, CSKY_INST_TYPE inst,
|
|
int reloc)
|
|
{
|
|
int i = 0;
|
|
int ret = 0;
|
|
if (pinfo->operand_num)
|
|
strcat (str, " \t");
|
|
if (pinfo->operand_num == -1)
|
|
{
|
|
ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
else
|
|
for (; i < pinfo->operand_num; i++)
|
|
{
|
|
if (i != 0)
|
|
strcat (str, ", ");
|
|
ret = csky_print_operand (str, &pinfo->oprnd.oprnds[i], inst, reloc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
info->fprintf_func (info->stream, "%s", str);
|
|
if (dis_info.need_output_symbol)
|
|
{
|
|
info->fprintf_func (info->stream, "\t// ");
|
|
info->print_address_func (dis_info.value, dis_info.info);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
number_to_chars_littleendian (char *buf, CSKY_INST_TYPE val, int n)
|
|
{
|
|
if (n <= 0)
|
|
abort ();
|
|
while (n--)
|
|
{
|
|
*buf++ = val & 0xff;
|
|
val >>= 8;
|
|
}
|
|
}
|
|
|
|
#define CSKY_READ_DATA() \
|
|
{ \
|
|
status = info->read_memory_func (memaddr, buf, 2, info); \
|
|
if (status) \
|
|
{ \
|
|
info->memory_error_func (status, memaddr, info); \
|
|
return -1; \
|
|
} \
|
|
if (info->endian == BFD_ENDIAN_BIG) \
|
|
inst |= (buf[0] << 8) | buf[1]; \
|
|
else if (info->endian == BFD_ENDIAN_LITTLE) \
|
|
inst |= (buf[1] << 8) | buf[0]; \
|
|
else \
|
|
abort(); \
|
|
info->bytes_per_chunk += 2; \
|
|
memaddr += 2; \
|
|
}
|
|
|
|
int
|
|
print_insn_csky (bfd_vma memaddr, struct disassemble_info *info)
|
|
{
|
|
unsigned char buf[4];
|
|
CSKY_INST_TYPE inst = 0;
|
|
int status;
|
|
char str[256];
|
|
long given;
|
|
int is_data = FALSE;
|
|
void (*printer) (bfd_vma, struct disassemble_info *, long);
|
|
unsigned int size = 4;
|
|
|
|
memset (str, 0, sizeof (str));
|
|
info->bytes_per_chunk = 0;
|
|
info->bytes_per_chunk = 0;
|
|
dis_info.mem = memaddr;
|
|
dis_info.info = info;
|
|
dis_info.need_output_symbol = 0;
|
|
if (mach_flag != INIT_MACH_FLAG && mach_flag != BINARY_MACH_FLAG)
|
|
info->mach = mach_flag;
|
|
else if (mach_flag == INIT_MACH_FLAG)
|
|
mach_flag = info->mach;
|
|
|
|
if (mach_flag == BINARY_MACH_FLAG && info->endian == BFD_ENDIAN_UNKNOWN)
|
|
info->endian = BFD_ENDIAN_LITTLE;
|
|
|
|
/* First check the full symtab for a mapping symbol, even if there
|
|
are no usable non-mapping symbols for this address. */
|
|
if (info->symtab_size != 0
|
|
&& bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour)
|
|
{
|
|
bfd_vma addr;
|
|
int n;
|
|
int last_sym = -1;
|
|
enum sym_type type = CUR_TEXT;
|
|
|
|
if (memaddr <= last_map_addr)
|
|
last_map_sym = -1;
|
|
/* Start scanning at the start of the function, or wherever
|
|
we finished last time. */
|
|
n = 0;
|
|
if (n < last_map_sym)
|
|
n = last_map_sym;
|
|
|
|
/* Scan up to the location being disassembled. */
|
|
for (; n < info->symtab_size; n++)
|
|
{
|
|
addr = bfd_asymbol_value (info->symtab[n]);
|
|
if (addr > memaddr)
|
|
break;
|
|
if ((info->section == NULL
|
|
|| info->section == info->symtab[n]->section)
|
|
&& get_sym_code_type (info, n, &type))
|
|
last_sym = n;
|
|
}
|
|
last_map_sym = last_sym;
|
|
last_type = type;
|
|
is_data = (last_type == CUR_DATA);
|
|
if (is_data)
|
|
{
|
|
size = 4 - ( memaddr & 3);
|
|
for (n = last_sym + 1; n < info->symtab_size; n++)
|
|
{
|
|
addr = bfd_asymbol_value (info->symtab[n]);
|
|
if (addr > memaddr)
|
|
{
|
|
if (addr - memaddr < size)
|
|
size = addr - memaddr;
|
|
break;
|
|
}
|
|
}
|
|
/* If the next symbol is after three bytes, we need to
|
|
print only part of the data, so that we can use either
|
|
.byte or .short. */
|
|
if (size == 3)
|
|
size = (memaddr & 1) ? 1 : 2;
|
|
}
|
|
}
|
|
info->bytes_per_line = 4;
|
|
|
|
if (is_data)
|
|
{
|
|
int i;
|
|
|
|
/* Size was already set above. */
|
|
info->bytes_per_chunk = size;
|
|
printer = print_insn_data;
|
|
|
|
status = info->read_memory_func (memaddr, (bfd_byte *) buf, size, info);
|
|
given = 0;
|
|
if (info->endian == BFD_ENDIAN_LITTLE)
|
|
for (i = size - 1; i >= 0; i--)
|
|
given = buf[i] | (given << 8);
|
|
else
|
|
for (i = 0; i < (int) size; i++)
|
|
given = buf[i] | (given << 8);
|
|
|
|
printer (memaddr, info, given);
|
|
return info->bytes_per_chunk;
|
|
}
|
|
|
|
/* Handle instructions. */
|
|
CSKY_READ_DATA();
|
|
if ((inst & 0xc000) == 0xc000 && IS_CSKY_V2 (mach_flag))
|
|
{
|
|
/* It's a 32-bit instruction. */
|
|
inst <<= 16;
|
|
CSKY_READ_DATA();
|
|
if (info->buffer && (info->endian == BFD_ENDIAN_LITTLE))
|
|
{
|
|
char* src = (char *)(info->buffer
|
|
+ ((memaddr - 4 - info->buffer_vma)
|
|
* info->octets_per_byte));
|
|
if (info->endian == BFD_ENDIAN_LITTLE)
|
|
number_to_chars_littleendian (src, inst, 4);
|
|
}
|
|
}
|
|
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
g_opcodeP = csky_v1_opcodes;
|
|
else
|
|
g_opcodeP = csky_v2_opcodes;
|
|
|
|
do
|
|
{
|
|
struct csky_opcode const *op;
|
|
struct csky_opcode_info const *pinfo = NULL;
|
|
int reloc;
|
|
|
|
memset (str, 0, sizeof (str));
|
|
op = csky_find_inst_info (&pinfo, inst, info->bytes_per_chunk);
|
|
if (!op)
|
|
{
|
|
if (IS_CSKY_V1 (mach_flag))
|
|
info->fprintf_func (info->stream, ".short: 0x%04x",
|
|
(unsigned short)inst);
|
|
else
|
|
info->fprintf_func (info->stream, ".long: 0x%08x",
|
|
(unsigned int)inst);
|
|
return info->bytes_per_chunk;
|
|
}
|
|
|
|
if (info->bytes_per_chunk == 2)
|
|
reloc = op->reloc16;
|
|
else
|
|
reloc = op->reloc32;
|
|
dis_info.opinfo = pinfo;
|
|
strcat (str, op->mnemonic);
|
|
|
|
if (csky_print_operands (str, pinfo, info, inst, reloc))
|
|
g_opcodeP++;
|
|
else
|
|
break;
|
|
} while (1);
|
|
|
|
return info->bytes_per_chunk;
|
|
}
|