| /* ----------------------------------------------------------------------- * |
| * |
| * Copyright 2016-2017 The NASM Authors - All Rights Reserved |
| * See the file AUTHORS included with the NASM distribution for |
| * the specific copyright holders. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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 COPYRIGHT HOLDERS AND |
| * 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 COPYRIGHT OWNER OR |
| * 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. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| /* |
| * output/legacy.c |
| * |
| * Mangle a struct out_data to match the rather bizarre legacy |
| * backend interface. |
| * |
| * The "data" parameter for the output function points to a "int64_t", |
| * containing the address of the target in question, unless the type is |
| * OUT_RAWDATA, in which case it points to an "uint8_t" |
| * array. |
| * |
| * Exceptions are OUT_RELxADR, which denote an x-byte relocation |
| * which will be a relative jump. For this we need to know the |
| * distance in bytes from the start of the relocated record until |
| * the end of the containing instruction. _This_ is what is stored |
| * in the size part of the parameter, in this case. |
| * |
| * Also OUT_RESERVE denotes reservation of N bytes of BSS space, |
| * and the contents of the "data" parameter is irrelevant. |
| */ |
| |
| #include "nasm.h" |
| #include "outlib.h" |
| |
| void nasm_do_legacy_output(const struct out_data *data) |
| { |
| const void *dptr = data->data; |
| enum out_type type = data->type; |
| int32_t tsegment = data->tsegment; |
| int32_t twrt = data->twrt; |
| uint64_t size = data->size; |
| |
| switch (data->type) { |
| case OUT_RELADDR: |
| switch (data->size) { |
| case 1: |
| type = OUT_REL1ADR; |
| break; |
| case 2: |
| type = OUT_REL2ADR; |
| break; |
| case 4: |
| type = OUT_REL4ADR; |
| break; |
| case 8: |
| type = OUT_REL8ADR; |
| break; |
| default: |
| panic(); |
| break; |
| } |
| |
| dptr = &data->toffset; |
| size = data->relbase - data->offset; |
| break; |
| |
| case OUT_SEGMENT: |
| type = OUT_ADDRESS; |
| dptr = zero_buffer; |
| size = (data->sign == OUT_SIGNED) ? -data->size : data->size; |
| tsegment |= 1; |
| break; |
| |
| case OUT_ADDRESS: |
| dptr = &data->toffset; |
| size = (data->sign == OUT_SIGNED) ? -data->size : data->size; |
| break; |
| |
| case OUT_RAWDATA: |
| case OUT_RESERVE: |
| tsegment = twrt = NO_SEG; |
| break; |
| |
| case OUT_ZERODATA: |
| tsegment = twrt = NO_SEG; |
| type = OUT_RAWDATA; |
| dptr = zero_buffer; |
| while (size > ZERO_BUF_SIZE) { |
| ofmt->legacy_output(data->segment, dptr, type, |
| ZERO_BUF_SIZE, tsegment, twrt); |
| size -= ZERO_BUF_SIZE; |
| } |
| break; |
| |
| default: |
| panic(); |
| break; |
| } |
| |
| ofmt->legacy_output(data->segment, dptr, type, size, tsegment, twrt); |
| } |