/**

 * $Id$

 *

 * Wrapper around i386-dis to supply the same behaviour as the other

 * disassembly functions.

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <stdarg.h>

#include <string.h>

#include "x86dasm/x86dasm.h"

#include "x86dasm/bfd.h"

#include "x86dasm/dis-asm.h"

#include "sh4/sh4.h"

#include "sh4/sh4trans.h"

const struct cpu_desc_struct x86_cpu_desc = 

    { "x86", (disasm_func_t)x86_disasm_instruction, NULL, mem_has_page, 

      NULL, NULL, NULL, 1, 

      NULL, 0, NULL, 

      &sh4r.pc };

static int x86_disasm_output( void *data, const char *format, ... );

static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info );

static struct disassemble_info x86_disasm_info;

static x86_symbol *x86_symtab;

static int x86_num_symbols = 0;   

void xlat_disasm_block( FILE *out, void *block )

{

    uint32_t buflen = xlat_get_code_size(block);

    x86_set_symtab( NULL, 0 );

    x86_disasm_block( out, block, buflen );

}

void x86_disasm_block(FILE *out, void *start, uint32_t len)

{

    uintptr_t start_addr = (uintptr_t)start;

    uintptr_t pc;

    x86_disasm_init( start, start_addr, len );

    for( pc = start_addr; pc < start_addr + len;  ) {

	char buf[256];

	char op[256];

	uintptr_t pc2 = x86_disasm_instruction( pc, buf, sizeof(buf), op );

	fprintf( out, "%08X: %-20s %s\n", (unsigned int)pc, op, buf );

	pc = pc2;

    }

}

void x86_disasm_init(unsigned char *buf, uintptr_t vma, int buflen)

{

    init_disassemble_info( &x86_disasm_info, NULL, x86_disasm_output );

    x86_disasm_info.arch = bfd_arch_i386;

#if SIZEOF_VOID_P == 8

    x86_disasm_info.mach =  bfd_mach_x86_64_intel_syntax;

#else

    x86_disasm_info.mach = bfd_mach_i386_i386_intel_syntax;

#endif

    x86_disasm_info.endian = BFD_ENDIAN_LITTLE;

    x86_disasm_info.buffer = buf;

    x86_disasm_info.buffer_vma = vma;

    x86_disasm_info.buffer_length = buflen;

    x86_disasm_info.print_address_func = x86_print_address;

}

void x86_set_symtab( x86_symbol *symtab, int num_symbols )

{

    x86_symtab = symtab;

    x86_num_symbols = num_symbols;

}

static const char *x86_find_symbol( bfd_vma memaddr, struct disassemble_info *info )

{

    int i;

    for( i=0; i<x86_num_symbols; i++ ) {

	if( x86_symtab[i].ptr == (void *)(uintptr_t)memaddr ) {

	    return x86_symtab[i].name;

	}

    }

    return NULL;

}

static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info )

{

    const char *sym = x86_find_symbol(memaddr, info);

    info->fprintf_func( info->stream, "%08X", memaddr );

    if( sym != NULL ) {

	info->fprintf_func( info->stream, " <%s>", sym );

    }

}

void x86_print_symbolic_operand( char *buf, int hex, unsigned int disp )

{

    const char *sym = x86_find_symbol(disp, NULL);

    if( sym != NULL ) {

        snprintf( buf, 50, "<%s>", sym );

    } else if( hex ) {

        sprintf( buf, "0x%x", disp );

    } else {

        sprintf( buf, "%d", (int)disp );

    }

}

uintptr_t x86_disasm_instruction( uintptr_t pc, char *buf, int len, char *opcode )

{

    int count, i;

    x86_disasm_info.stream = buf;

    buf[0] = 0;

    count = print_insn_i386_att( pc, &x86_disasm_info );

    if( count != 0 ) {

	unsigned char tmp[count];

	x86_disasm_info.read_memory_func( pc, tmp, count, &x86_disasm_info );

	for( i=0; i<count; i++ ) {

	    sprintf( opcode, "%02X ", ((unsigned int)tmp[i])&0xFF );

	    opcode += 3;

	}

	*(opcode-1) = '\0';

    }

    return pc + count;

}

int x86_disasm_output( void *data, const char *format, ... )

{

    char *p = (char *)data;

    va_list ap;

    int n;

    p += strlen(p);

    va_start( ap, format );

    n = vsprintf( p, format, ap );

    va_end( ap );

    return n;

}