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/*
* Bytecode utility functions
*
* Copyright (C) 2001-2007 Peter Johnson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "util.h"
#include "libyasm-stdint.h"
#include "coretype.h"
#include "errwarn.h"
#include "intnum.h"
#include "expr.h"
#include "value.h"
#include "bytecode.h"
typedef struct bytecode_reserve {
/*@only@*/ /*@null@*/ yasm_expr *numitems; /* number of items to reserve */
unsigned int itemsize; /* size of each item (in bytes) */
} bytecode_reserve;
static void bc_reserve_destroy(void *contents);
static void bc_reserve_print(const void *contents, FILE *f, int indent_level);
static void bc_reserve_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc);
static int bc_reserve_elem_size(yasm_bytecode *bc);
static int bc_reserve_calc_len(yasm_bytecode *bc,
yasm_bc_add_span_func add_span,
void *add_span_data);
static int bc_reserve_tobytes(yasm_bytecode *bc, unsigned char **bufp,
unsigned char *bufstart, void *d,
yasm_output_value_func output_value,
/*@null@*/ yasm_output_reloc_func output_reloc);
static const yasm_bytecode_callback bc_reserve_callback = {
bc_reserve_destroy,
bc_reserve_print,
bc_reserve_finalize,
bc_reserve_elem_size,
bc_reserve_calc_len,
yasm_bc_expand_common,
bc_reserve_tobytes,
YASM_BC_SPECIAL_RESERVE
};
static void
bc_reserve_destroy(void *contents)
{
bytecode_reserve *reserve = (bytecode_reserve *)contents;
yasm_expr_destroy(reserve->numitems);
yasm_xfree(contents);
}
static void
bc_reserve_print(const void *contents, FILE *f, int indent_level)
{
const bytecode_reserve *reserve = (const bytecode_reserve *)contents;
fprintf(f, "%*s_Reserve_\n", indent_level, "");
fprintf(f, "%*sNum Items=", indent_level, "");
yasm_expr_print(reserve->numitems, f);
fprintf(f, "\n%*sItem Size=%u\n", indent_level, "", reserve->itemsize);
}
static void
bc_reserve_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc)
{
bytecode_reserve *reserve = (bytecode_reserve *)bc->contents;
/* multiply reserve expression into multiple */
if (!bc->multiple)
bc->multiple = reserve->numitems;
else
bc->multiple = yasm_expr_create_tree(bc->multiple, YASM_EXPR_MUL,
reserve->numitems, bc->line);
reserve->numitems = NULL;
}
static int
bc_reserve_elem_size(yasm_bytecode *bc)
{
bytecode_reserve *reserve = (bytecode_reserve *)bc->contents;
return reserve->itemsize;
}
static int
bc_reserve_calc_len(yasm_bytecode *bc, yasm_bc_add_span_func add_span,
void *add_span_data)
{
bytecode_reserve *reserve = (bytecode_reserve *)bc->contents;
bc->len += reserve->itemsize;
return 0;
}
static int
bc_reserve_tobytes(yasm_bytecode *bc, unsigned char **bufp,
unsigned char *bufstart, void *d,
yasm_output_value_func output_value,
/*@unused@*/ yasm_output_reloc_func output_reloc)
{
yasm_internal_error(N_("bc_reserve_tobytes called"));
/*@notreached@*/
return 1;
}
yasm_bytecode *
yasm_bc_create_reserve(yasm_expr *numitems, unsigned int itemsize,
unsigned long line)
{
bytecode_reserve *reserve = yasm_xmalloc(sizeof(bytecode_reserve));
/*@-mustfree@*/
reserve->numitems = numitems;
/*@=mustfree@*/
reserve->itemsize = itemsize;
return yasm_bc_create_common(&bc_reserve_callback, reserve, line);
}
const yasm_expr *
yasm_bc_reserve_numitems(yasm_bytecode *bc, unsigned int *itemsize)
{
bytecode_reserve *reserve;
if (bc->callback != &bc_reserve_callback)
return NULL;
reserve = (bytecode_reserve *)bc->contents;
*itemsize = reserve->itemsize;
return reserve->numitems;
}
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