217e714e6b
The legacy output doesn't distinguish between segments and other addresses, so we need to force the offset to zero before passing it down to the output layer. This addresses BR 3392406. Reported-by: <rugxulo@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2016 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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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
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* conditions are met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* output/legacy.c
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*
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* Mangle a struct out_data to match the rather bizarre legacy
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* backend interface.
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*
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* The "data" parameter for the output function points to a "int64_t",
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* containing the address of the target in question, unless the type is
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* OUT_RAWDATA, in which case it points to an "uint8_t"
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* array.
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*
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* Exceptions are OUT_RELxADR, which denote an x-byte relocation
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* which will be a relative jump. For this we need to know the
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* distance in bytes from the start of the relocated record until
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* the end of the containing instruction. _This_ is what is stored
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* in the size part of the parameter, in this case.
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*
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* Also OUT_RESERVE denotes reservation of N bytes of BSS space,
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* and the contents of the "data" parameter is irrelevant.
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*/
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#include "nasm.h"
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#include "outlib.h"
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void nasm_do_legacy_output(const struct out_data *data)
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{
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const void *dptr = data->data;
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enum out_type type = data->type;
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int32_t tsegment = data->tsegment;
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int32_t twrt = data->twrt;
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uint64_t size = data->size;
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switch (data->type) {
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case OUT_RELADDR:
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switch (data->size) {
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case 1:
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type = OUT_REL1ADR;
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break;
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case 2:
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type = OUT_REL2ADR;
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break;
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case 4:
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type = OUT_REL4ADR;
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break;
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case 8:
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type = OUT_REL8ADR;
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break;
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default:
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panic();
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break;
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}
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dptr = &data->toffset;
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size = data->relbase - data->offset;
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break;
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case OUT_SEGMENT:
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type = OUT_ADDRESS;
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dptr = &zero_buffer;
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size = (data->sign == OUT_SIGNED) ? -data->size : data->size;
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break;
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case OUT_ADDRESS:
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dptr = &data->toffset;
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size = (data->sign == OUT_SIGNED) ? -data->size : data->size;
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break;
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case OUT_RAWDATA:
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case OUT_RESERVE:
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tsegment = twrt = NO_SEG;
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break;
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default:
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panic();
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break;
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}
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ofmt->legacy_output(data->segment, dptr, type, size, tsegment, twrt);
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}
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