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263 lines
8.5 KiB
263 lines
8.5 KiB
/* |
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* Incbin bytecode |
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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("$Id$"); |
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#include "libyasm-stdint.h" |
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#include "coretype.h" |
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#include "linemap.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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#include "file.h" |
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typedef struct bytecode_incbin { |
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/*@only@*/ char *filename; /* file to include data from */ |
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const char *from; /* filename of what contained incbin */ |
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/* starting offset to read from (NULL=0) */ |
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/*@only@*/ /*@null@*/ yasm_expr *start; |
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/* maximum number of bytes to read (NULL=no limit) */ |
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/*@only@*/ /*@null@*/ yasm_expr *maxlen; |
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} bytecode_incbin; |
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static void bc_incbin_destroy(void *contents); |
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static void bc_incbin_print(const void *contents, FILE *f, int indent_level); |
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static void bc_incbin_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc); |
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static int bc_incbin_calc_len(yasm_bytecode *bc, yasm_bc_add_span_func add_span, |
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void *add_span_data); |
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static int bc_incbin_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_incbin_callback = { |
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bc_incbin_destroy, |
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bc_incbin_print, |
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bc_incbin_finalize, |
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bc_incbin_calc_len, |
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yasm_bc_expand_common, |
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bc_incbin_tobytes, |
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0 |
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}; |
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static void |
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bc_incbin_destroy(void *contents) |
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{ |
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bytecode_incbin *incbin = (bytecode_incbin *)contents; |
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yasm_xfree(incbin->filename); |
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yasm_expr_destroy(incbin->start); |
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yasm_expr_destroy(incbin->maxlen); |
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yasm_xfree(contents); |
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} |
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static void |
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bc_incbin_print(const void *contents, FILE *f, int indent_level) |
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{ |
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const bytecode_incbin *incbin = (const bytecode_incbin *)contents; |
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fprintf(f, "%*s_IncBin_\n", indent_level, ""); |
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fprintf(f, "%*sFilename=`%s'\n", indent_level, "", |
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incbin->filename); |
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fprintf(f, "%*sStart=", indent_level, ""); |
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if (!incbin->start) |
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fprintf(f, "nil (0)"); |
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else |
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yasm_expr_print(incbin->start, f); |
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fprintf(f, "%*sMax Len=", indent_level, ""); |
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if (!incbin->maxlen) |
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fprintf(f, "nil (unlimited)"); |
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else |
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yasm_expr_print(incbin->maxlen, f); |
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fprintf(f, "\n"); |
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} |
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static void |
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bc_incbin_finalize(yasm_bytecode *bc, yasm_bytecode *prev_bc) |
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{ |
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bytecode_incbin *incbin = (bytecode_incbin *)bc->contents; |
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yasm_value val; |
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if (yasm_value_finalize_expr(&val, incbin->start, prev_bc, 0)) |
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yasm_error_set(YASM_ERROR_TOO_COMPLEX, |
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N_("start expression too complex")); |
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else if (val.rel) |
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yasm_error_set(YASM_ERROR_NOT_ABSOLUTE, |
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N_("start expression not absolute")); |
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incbin->start = val.abs; |
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if (yasm_value_finalize_expr(&val, incbin->maxlen, prev_bc, 0)) |
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yasm_error_set(YASM_ERROR_TOO_COMPLEX, |
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N_("maximum length expression too complex")); |
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else if (val.rel) |
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yasm_error_set(YASM_ERROR_NOT_ABSOLUTE, |
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N_("maximum length expression not absolute")); |
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incbin->maxlen = val.abs; |
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} |
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static int |
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bc_incbin_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_incbin *incbin = (bytecode_incbin *)bc->contents; |
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FILE *f; |
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/*@dependent@*/ /*@null@*/ const yasm_intnum *num; |
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unsigned long start = 0, maxlen = 0xFFFFFFFFUL, flen; |
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/* Try to convert start to integer value */ |
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if (incbin->start) { |
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num = yasm_expr_get_intnum(&incbin->start, 0); |
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if (num) |
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start = yasm_intnum_get_uint(num); |
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if (!num) { |
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/* FIXME */ |
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yasm_error_set(YASM_ERROR_NOT_IMPLEMENTED, |
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N_("incbin does not yet understand non-constant")); |
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return -1; |
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} |
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} |
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/* Try to convert maxlen to integer value */ |
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if (incbin->maxlen) { |
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num = yasm_expr_get_intnum(&incbin->maxlen, 0); |
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if (num) |
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maxlen = yasm_intnum_get_uint(num); |
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if (!num) { |
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/* FIXME */ |
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yasm_error_set(YASM_ERROR_NOT_IMPLEMENTED, |
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N_("incbin does not yet understand non-constant")); |
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return -1; |
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} |
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} |
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/* Open file and determine its length */ |
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f = yasm_fopen_include(incbin->filename, incbin->from, "rb", NULL); |
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if (!f) { |
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yasm_error_set(YASM_ERROR_IO, |
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N_("`incbin': unable to open file `%s'"), |
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incbin->filename); |
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return -1; |
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} |
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if (fseek(f, 0L, SEEK_END) < 0) { |
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yasm_error_set(YASM_ERROR_IO, |
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N_("`incbin': unable to seek on file `%s'"), |
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incbin->filename); |
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return -1; |
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} |
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flen = (unsigned long)ftell(f); |
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fclose(f); |
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/* Compute length of incbin from start, maxlen, and len */ |
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if (start > flen) { |
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yasm_warn_set(YASM_WARN_GENERAL, |
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N_("`incbin': start past end of file `%s'"), |
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incbin->filename); |
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start = flen; |
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} |
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flen -= start; |
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if (incbin->maxlen) |
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if (maxlen < flen) |
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flen = maxlen; |
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bc->len += flen; |
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return 0; |
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} |
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static int |
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bc_incbin_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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bytecode_incbin *incbin = (bytecode_incbin *)bc->contents; |
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FILE *f; |
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/*@dependent@*/ /*@null@*/ const yasm_intnum *num; |
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unsigned long start = 0; |
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/* Convert start to integer value */ |
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if (incbin->start) { |
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num = yasm_expr_get_intnum(&incbin->start, 0); |
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if (!num) |
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yasm_internal_error( |
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N_("could not determine start in bc_tobytes_incbin")); |
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start = yasm_intnum_get_uint(num); |
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} |
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/* Open file */ |
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f = yasm_fopen_include(incbin->filename, incbin->from, "rb", NULL); |
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if (!f) { |
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yasm_error_set(YASM_ERROR_IO, N_("`incbin': unable to open file `%s'"), |
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incbin->filename); |
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return 1; |
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} |
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/* Seek to start of data */ |
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if (fseek(f, (long)start, SEEK_SET) < 0) { |
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yasm_error_set(YASM_ERROR_IO, |
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N_("`incbin': unable to seek on file `%s'"), |
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incbin->filename); |
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fclose(f); |
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return 1; |
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} |
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/* Read len bytes */ |
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if (fread(*bufp, 1, (size_t)bc->len, f) < (size_t)bc->len) { |
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yasm_error_set(YASM_ERROR_IO, |
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N_("`incbin': unable to read %lu bytes from file `%s'"), |
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bc->len, incbin->filename); |
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fclose(f); |
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return 1; |
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} |
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*bufp += bc->len; |
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fclose(f); |
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return 0; |
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} |
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yasm_bytecode * |
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yasm_bc_create_incbin(char *filename, yasm_expr *start, yasm_expr *maxlen, |
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yasm_linemap *linemap, unsigned long line) |
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{ |
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bytecode_incbin *incbin = yasm_xmalloc(sizeof(bytecode_incbin)); |
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unsigned long xline; |
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/* Find from filename based on line number */ |
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yasm_linemap_lookup(linemap, line, &incbin->from, &xline); |
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/*@-mustfree@*/ |
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incbin->filename = filename; |
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incbin->start = start; |
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incbin->maxlen = maxlen; |
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/*@=mustfree@*/ |
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return yasm_bc_create_common(&bc_incbin_callback, incbin, line); |
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}
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