143 lines
4.8 KiB
C
143 lines
4.8 KiB
C
/*
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* Bytecode utility functions
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*
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* Copyright (C) 2001-2007 Peter Johnson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "util.h"
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/*@unused@*/ RCSID("$Id: bc-reserve.c 1895 2007-07-14 05:31:08Z peter $");
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#include "libyasm-stdint.h"
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#include "coretype.h"
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#include "errwarn.h"
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#include "intnum.h"
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#include "expr.h"
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#include "value.h"
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#include "bytecode.h"
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typedef struct bytecode_reserve {
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/*@only@*/ /*@null@*/ yasm_expr *numitems; /* number of items to reserve */
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unsigned int itemsize; /* size of each item (in bytes) */
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} bytecode_reserve;
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static void bc_reserve_destroy(void *contents);
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static void bc_reserve_print(const void *contents, FILE *f, int indent_level);
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static void bc_reserve_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc);
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static int bc_reserve_calc_len(yasm_bytecode *bc,
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yasm_bc_add_span_func add_span,
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void *add_span_data);
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static int bc_reserve_tobytes(yasm_bytecode *bc, unsigned char **bufp, void *d,
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yasm_output_value_func output_value,
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/*@null@*/ yasm_output_reloc_func output_reloc);
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static const yasm_bytecode_callback bc_reserve_callback = {
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bc_reserve_destroy,
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bc_reserve_print,
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bc_reserve_finalize,
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bc_reserve_calc_len,
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yasm_bc_expand_common,
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bc_reserve_tobytes,
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YASM_BC_SPECIAL_RESERVE
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};
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static void
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bc_reserve_destroy(void *contents)
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{
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bytecode_reserve *reserve = (bytecode_reserve *)contents;
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yasm_expr_destroy(reserve->numitems);
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yasm_xfree(contents);
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}
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static void
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bc_reserve_print(const void *contents, FILE *f, int indent_level)
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{
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const bytecode_reserve *reserve = (const bytecode_reserve *)contents;
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fprintf(f, "%*s_Reserve_\n", indent_level, "");
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fprintf(f, "%*sNum Items=", indent_level, "");
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yasm_expr_print(reserve->numitems, f);
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fprintf(f, "\n%*sItem Size=%u\n", indent_level, "", reserve->itemsize);
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}
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static void
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bc_reserve_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc)
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{
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bytecode_reserve *reserve = (bytecode_reserve *)bc->contents;
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/* multiply reserve expression into multiple */
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if (!bc->multiple)
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bc->multiple = reserve->numitems;
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else
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bc->multiple = yasm_expr_create_tree(bc->multiple, YASM_EXPR_MUL,
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reserve->numitems, bc->line);
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reserve->numitems = NULL;
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}
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static int
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bc_reserve_calc_len(yasm_bytecode *bc, yasm_bc_add_span_func add_span,
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void *add_span_data)
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{
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bytecode_reserve *reserve = (bytecode_reserve *)bc->contents;
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bc->len += reserve->itemsize;
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return 0;
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}
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static int
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bc_reserve_tobytes(yasm_bytecode *bc, unsigned char **bufp, void *d,
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yasm_output_value_func output_value,
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/*@unused@*/ yasm_output_reloc_func output_reloc)
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{
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yasm_internal_error(N_("bc_reserve_tobytes called"));
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/*@notreached@*/
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return 1;
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}
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yasm_bytecode *
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yasm_bc_create_reserve(yasm_expr *numitems, unsigned int itemsize,
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unsigned long line)
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{
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bytecode_reserve *reserve = yasm_xmalloc(sizeof(bytecode_reserve));
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/*@-mustfree@*/
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reserve->numitems = numitems;
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/*@=mustfree@*/
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reserve->itemsize = itemsize;
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return yasm_bc_create_common(&bc_reserve_callback, reserve, line);
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}
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const yasm_expr *
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yasm_bc_reserve_numitems(yasm_bytecode *bc, unsigned int *itemsize)
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{
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bytecode_reserve *reserve;
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if (bc->callback != &bc_reserve_callback)
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return NULL;
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reserve = (bytecode_reserve *)bc->contents;
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*itemsize = reserve->itemsize;
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return reserve->numitems;
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}
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